FN ISI Export Format VR 1.0 PT J AU Gervilla, F Sanchez-Anguita, A Acevedo, RD Hach-Ali, PF TI Platinum-group element sulpharsenides and Pd bismuthotellurides in the metamorphosed Ni-Cu deposit at Las Aguilas (Province of San Luis, Argentina) SO MINERALOGICAL MAGAZINE LA English DT Article DE cobaltian hollingworthite; rhodian nickelian cobaltite; Pd bismuthotellurides; Ni-Cu ores; metamorphic reworking; Sierras Pampeanas; Argentina ID FE-AS-S; GROUP MINERALS; PHASE RELATIONS; RATHBUN LAKE; ONTARIO; COMPLEX; SYSTEM; PGE; MINERALIZATION; INTRUSION AB The Las Aguilas Ni-Cu-PGE deposit is associated with a sequence of basic-ultrabasic rocks made up of dunite, harzurgite, norite and amphibolite. These igneous (partially metamorphosed) rocks, and their host granulites, gneisses and migmatites of probable Precambrian age, are highly folded. The sulphide ore, consisting of pyrrhotite, pentlandite and chalcopyrite, occurs in the cores of both antiform and synform structures, within dunite, harzburgite and mainly along shear zones in bronzitite, replacing small mylonitic subgrains. The platinum-group mineral assemblage is dominated by Pd bismuthotellurides (Pt-free merenskyite, palladian bismuthian melonite and michenerite), with minor sperrylite, and PGE-sulpharsenides. The latter often occur as single, zoned crystals frequently showing cores of irarsite; outside these are concentric zones of cobaltian hollingworthite, rhodian nickelian cobaltite and Fe-rich nickelian cobaltite. Mineralogical, textural and chemical evidence indicate that the sperrylite and platinum-group element sulpharsenides were formed during a primary magmatic event associated with the fractionation of a basaltic melt, which was contaminated by the assimilation of metamorphic crustal rocks. PGE sulpharsenides crystallized from As-bearing, residual magmatic liquids that collected PGE and segregated after the crystallization of the monosulfide solid solution. During high-grade metamorphism, sulpharsenides were remobilized as solid crystals in the liquated sulfides suffering partial dissolution and fracturing. On the other hand, there is no evidence of a primary concentration of Pd-bismuthotelluride minerals, and their present spatial distribution is only the consequence of their formation under high-to medium-grade metamorphism, down to temperatures of below 500 degrees C. Pd bismuthotellurides crystallize even in fractures of sulpharsenides, attached to the boundaries of highly dissolved sulpharsenide crystals, and intergrown with molybdenite. C1 Inst Andaluz Ciencias Tierra, Granada 18002, Spain. Univ Granada, CSIC, Dept Mineral & Petrol, Granada 18002, Spain. APLITEG SL, Granada 18007, Spain. CONICET, Ctr Austral Invest Cient, RA-9410 Ushuaia, Tierra Del Fueg, Argentina. Univ Oviedo, Dept Geol, E-33005 Oviedo, Spain. RP Gervilla, F, Inst Andaluz Ciencias Tierra, Avda Fuentenueva S-N, Granada 18002, Spain. NR 34 TC 17 PU MINERALOGICAL SOCIETY PI LONDON PA 41 QUEENS GATE, LONDON, ENGLAND SW7 5HR SN 0026-461X J9 MINER MAG JI Mineral. Mag. PD DEC PY 1997 VL 61 IS 6 BP 861 EP 877 PG 17 SC Mineralogy GA YM369 UT ISI:000071056700009 ER PT J AU Nogales, FF Carvia, RE Donne, C Campello, TR Vidal, M Martin, A TI Adenomas of the rete ovarii SO HUMAN PATHOLOGY LA English DT Article DE ovary; rete ovarii; adenoma; adenocarcinoma; adenomatous hyperplasia; mesonephros; CA125 ID PROBABLE WOLFFIAN ORIGIN; TESTIS; HYPERPLASIA; TUMORS; ADENOCARCINOMA AB This article reports the clinicopathological and immunohistochemical findings of two cases of adenoma of the the rete ovarii (RO), one unilateral and the other bilateral, presenting with atypical histological features in the right ovary. Both tumors were incidental findings in 62- and 64-year-old patients presenting with metrorrhagia. The predominantly cystic lesions measured 2 cm and 3 cm in diameter and microscopically, they were tubulopapillary proliferations of regular columnar cells with clear cytoplasm. The stroma showed extensive differentiation of polygonal, Leydig-like cells which was associated in both cases with simple endometrial hyperplasia. In both cases rete and hilar mesonephric remnants were found in the vicinity of the lesion. The atypical lesion in one case had a complex papillary proliferation different in pattern and cellularity from a retiform Sertoli-Leydig cell tumor. It showed extensive areas of eosinophilic change, pleomorphism, and a few mitoses but did not invade the adjacent ovarian stroma. Its stroma also had steroidally active cells. The patient was alive and well after a follow-up interval of 3 years. Immunohistochemically, the lesions were diffusely positive for CAM 5.2, vimentin, epithelial membrane antigen, OC 125, OC 125, and progesterone receptors. Copyright (C) 1997 by W.B. Saunders Company. C1 Univ Hosp, Dept Pathol, Granada, Spain. Hop Jeanne Arc, Dept Pathol, Lyon, France. Univ Fed Pernambuco, Recife, PE, Brazil. RP Nogales, FF, Fac Med, Dept Anat Patol, Granada 18012, Spain. NR 19 TC 11 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 USA SN 0046-8177 J9 HUM PATHOL JI Hum. Pathol. PD DEC PY 1997 VL 28 IS 12 BP 1428 EP 1433 PG 6 SC Pathology GA YM711 UT ISI:000071093200016 ER PT J AU Steffen, W Gomez, JL Raga, AC Williams, RJR TI Jet-cloud interactions and the brightening of the narrow-line region in Seyfert galaxies SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies, active; galaxies, jets; galaxies, Seyfert; hydrodynamics; methods, numerical; shock waves ID INTERSTELLAR CLOUDS AB We study the kinematical and brightness evolution of emission-line clouds in the narrow-line region (NLR) of Seyfert galaxies during the passage of a jet. We derive a critical density above which a cloud remains radiative after compression by the jet cocoon. The critical density depends mainly on the cocoon pressure. Supercritical clouds increase in emission-line brightness, while subcritical clouds generally are highly overheated, reducing their luminosity below that of the intercloud medium. As a result of the pressure stratification in the bow shock of the jet, a cylindrical structure of nested shells develops around the jet. The most compact and brightest compressed clouds surround the cloud-free channel of the radio jet. To support our analytical model, we present a numerical simulation of a supersonic jet propagating into a clumpy NLR. The position-velocity diagram of the simulated H alpha emission shows total line widths of the order of 500 km s(-1) with large-scale variations in the radial velocities of the clouds due to the stratified pressure in the bow shock region of the jet. Most of the luminosity is concentrated in a few dense clouds surrounding the jet. These morphological and kinematic signatures are all found in the well-observed NLR of NGC 1068 and other Seyfert galaxies. C1 Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, England. RP Steffen, W, Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. NR 19 TC 21 PU UNIV CHICAGO PRESS PI CHICAGO PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1997 VL 491 IS 2 PN Part 2 BP L73 EP + PG 5 SC Astronomy & Astrophysics GA YN296 UT ISI:000071152700002 ER PT J AU Rosales-Borjas, DM Diaz-Rivadeneyra, J Dona-Leyva, A Zambrano-Villa, SA Mascaro, C Osuna, A Ortiz-Ortiz, L TI Secretory immune response to membrane antigens during Giardia lamblia infection in humans SO INFECTION AND IMMUNITY LA English DT Article ID SERUM; ANTIBODIES; PROTEINS AB The secretory immune response in humans infected with Giardia lamblia was studied by using saliva samples and a membrane rich protein fraction, The membrane fraction, studied by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, showed 24 antigen bands, ranging from 170 to 14 kDa, Saliva samples from giardiasis patients showed a heterogeneous response against the membrane fraction when they were assayed by immunoblotting. Among the antigens recognized by patient saliva samples, those of 170, 105, 92, 66, 32, 29, and 14 kDa stood out, These antigens were not recognized by saliva samples from healthy individuals, They may be of importance in future studies of protection from or diagnosis of G, lamblia infections. C1 Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, Mexico. Univ Granada, Inst Biotecnol, Grp Bioquim & Parasitol Mol, Granada, Spain. EMASAGRA, Granada, Spain. Hosp Univ Dr Miguel Oraa, Guanare, Edo Portuguesa, Venezuela. Univ Guadalajara, Ctr Univ Ciencias Exactas & Ingn, Guadalajara 44430, Jalisco, Mexico. RP Ortiz-Ortiz, L, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Apartado Postal 70228, Mexico City 04510, DF, Mexico. NR 24 TC 6 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 USA SN 0019-9567 J9 INFEC IMMUNITY JI Infect. Immun. PD FEB PY 1998 VL 66 IS 2 BP 756 EP 759 PG 4 SC Immunology; Infectious Diseases GA YU693 UT ISI:000071744800051 ER PT J AU Vaz, LPR Cunha, NCS Andersen, J Clausen, JV Garcia, JM Gimenez, A Casey, BW de Koff, S TI Four-colour photometry of eclipsing binaries - XXXVI. Light curves of the O7V+O9V system V 3903 Sagittarii SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE binaries, eclipsing, spectroscopic; stars, individual, V 3903 Sgr; stars, early-type ID Y-CYGNI; STARS AB Complete uvby light curves of the young detached double-lined massive O-type eclipsing binary V 3903 Sagittarii, obtained from 1989 to 1994, are presented. The observations were obtained at two different sites and a discussion of the characteristics of both data sets is included. C1 Univ Fed Minas Gerais, Dept Fis, ICEx, BR-30161970 Belo Horizonte, MG, Brazil. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. NBIfAFG, Astron Observ, DK-2100 Copenhagen, Denmark. UPM, EUIT Ind, Dept Fis, E-28012 Madrid, Spain. Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Wisconsin, Dept Astron, Madison, WI 53706 USA. Leiden Univ, Sterrewacht Leiden, NL-2333 CA Leiden, Netherlands. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Vaz, LPR, Univ Fed Minas Gerais, Dept Fis, ICEx, CP 702, BR-30161970 Belo Horizonte, MG, Brazil. NR 14 TC 1 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD MAR PY 1998 VL 128 IS 2 BP 251 EP 254 PG 4 SC Astronomy & Astrophysics GA ZC425 UT ISI:000072576700002 ER PT J AU Chapellier, E Sadsaoud, H Valtier, JC Garrido, R Sareyan, JP Le Contel, JM Alvarez, M TI 53 Persei: A slowly pulsating B star SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE stars : variables : general stars : oscillations stars : individual : 53 Persei ID NONRADIAL PULSATIONS; OPACITY MECHANISM; MODES AB A new investigation of the behaviour of the star 53 Per was performed. New photometric observations allow to confirm two dominant periods p(1)=2.16 d, p(2)=1.67 d. A third one p(3)=3.64 d is detected. These long period variations are present in our radial velocities data and in old equivalent width data. The amplitude of the p(1)=2.16d period increases from 1977 to 1991, while the amplitude of the 1.67 d period remains constant. Considering the observational characteristics of the star since 1997, 53 Per clearly belongs to the Slowly Pulsating B stars group as defined by Waelkens (1991)and North & Paltani (1994). C1 Observ Cote Azur, CNRS, UMR 6528, F-06304 Nice 04, France. Ctr Rech Astron Astrophys & Geophys, Algiers 16340, Algeria. Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Natl Astron Observ, Ensenada 22800, Baja California, Mexico. RP Chapellier, E, Observ Cote Azur, CNRS, UMR 6528, BP 4229, F-06304 Nice 04, France. NR 24 TC 6 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 1998 VL 331 IS 3 BP 1046 EP 1050 PG 5 SC Astronomy & Astrophysics GA ZD690 UT ISI:000072713100037 ER PT J AU Concepcion, JL Gonzalez-Pacanowska, D Urbina, JA TI 3-hydroxy-3-methyl-glutaryl-CoA reductase in Trypanosoma (Schizotrypanum) cruzi: Subcellular localization and kinetic properties SO ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS LA English DT Article DE Trypanosoma cruzi; epimastigotes; sterol biosynthesis; 3-hydroxy-3-methyl-glutaryl-CoA reductase; glycosomes; digitonin-permeabilized cells ID COENZYME-A REDUCTASE; STEROL BIOSYNTHESIS; 3-HYDROXY-3-METHYLGLUTARYL-COENZYME-A REDUCTASE; GROWTH; KETOCONAZOLE; EPIMASTIGOTES; PROMASTIGOTES; MEVINOLIN; PROTEINS; INVITRO AB The subcellular localization of 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase, which catalyzes the first committed step of the mevalonate pathway, was investigated in Trypanosoma cruzi epimastigotes using web-established cell fractionation procedures, It was found that ca. 80% of the activity of the enzyme was associated with the glycosomes, microbody-like organelles unique to kinetoplastid protozoa which contain most of the enzymes of the glycolytic pathway, while the rest of the activity was found in the soluble (cytoplasmatic) fraction, with almost no activity associated with microsomes. The glycosome-associated enzyme is not membrane-bound as it was recovered quantitatively in the aqueous phase of the biphasic system formed by Triton X-114 at 30 degrees C, Studies with digitonin-permeabilized intact epimastigotes demonstrated the presence of two pools of soluble HMG-CoA reductase in these cells, associated to the cytoplasmic and glycosomal compartments. Steady-state kinetic studies of the glycosome-associated enzyme indicated classical Michaelis-Menten behavior with K-m,K-app (HMG-CoA) 28 +/- 3 mu M, K-m,K-app (NADPH) 37 +/- 4 mu M, and V-m,V-app 3.9 +/- 0.2 nmol/min mg protein; the transition-state analog lovastatin behaved as a competitive inhibitor with respect to HMG-CoA with K-is 23 nM and a noncompetitive inhibitor toward NADPH with K-ii 29 nM. The results are in complete agreement with recent gene cloning and expression studies which showed that T. cruzi HMG-CoA reductase lacks the NH2-terminal membrane-spanning sequence, This is the first demonstration of a soluble eukaryotic HMG-CoA reductase and also the first report on the presence of an enzyme of the isoprenoid biosynthesis pathway in glycosomes. (C) 1998 Academic Press. C1 Univ Los Andes, Fac Ciencias, Lab Enzimol Parasitos, Merida 5101, Venezuela. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Inst Venezolano Invest Cient, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020A, Venezuela. RP Urbina, JA, Univ Illinois, Dept Chem, Chem & Life Sci Lab, Room A106,600 S Mathews Ave, Urbana, IL 61801 USA. EM jaurbina@churchill.scs.uiuc.edu NR 43 TC 27 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0003-9861 J9 ARCH BIOCHEM BIOPHYS JI Arch. Biochem. Biophys. PD APR 1 PY 1998 VL 352 IS 1 BP 114 EP 120 PG 7 SC Biochemistry & Molecular Biology; Biophysics GA ZF421 UT ISI:000072895800014 ER PT J AU Pena, JH Peniche, R Hobart, MA Rolland, A de Coca, PL Paparo, M Parrao, L de la Cruz, C Olivares, JI Costa, V Ibanoglu, C Ertan, AY Tumer, O Evren, S Tunca, Z TI Photoelectric photometry and period analysis of selected Delta Scuti stars in Praesepe SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE stars, Delta Scuti, open clusters, Praesepe; stars, oscillations ID UVBY-BETA-PHOTOMETRY; ICCD SPECKLE OBSERVATIONS; OPEN CLUSTERS; BU CANCRI; PROPER MOTION; BINARY STARS; PULSATION; VARIABLES; MEMBERS; PLEIADES AB Photoelectric photometry of seven Delta Scuti stars in Praesepe was secured. Three of them were observed simultaneously at observatories located at different longitudes. Period analysis has been carried out for each star with different computing packages and the results compared to those in the literature. Their physical characteristics have been determined from the Stromgren photometry and theoretical and empirical calibrations. C1 UNAM, Astron Inst, Mexico City, DF, Mexico. UV, Fac Fis, Xalapa, Ver, Mexico. Inst Astrofis Andalucia, E-18080 Granada, Spain. Konkoly Observ Budapest, H-1525 Budapest 12, Hungary. Ege Univ Observ, Bornova Izmir, Turkey. RP Pena, JH, UNAM, Astron Inst, Ap Postal 70-264, Mexico City, DF, Mexico. NR 70 TC 5 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD APR PY 1998 VL 129 IS 1 BP 9 EP 22 PG 14 SC Astronomy & Astrophysics GA ZH242 UT ISI:000073087600002 ER PT J AU Garcia-Romera, I Garcia-Garrido, JM Martin, J Fracchia, S Mujica, MT Godeas, A Ocampo, JA TI Interactions between Saprotrophic Fusarium strains and arbuscular mycorrhizas of soybean plants SO SYMBIOSIS LA English DT Article DE arbuscular mycorrhizas; Fusarium; Glomus mosseae; Glycine max; saprotrophic fungi ID GLOMUS-MOSSEAE; TRICHODERMA-AUREOVIRIDE; GROWTH; FUNGI; INOCULATION; INFECTION; ROOTS AB We studied the effect of inoculation with the saprotrophic fungi Fusarium concolor-2183, F, equiseti-91, F. graminearum-122, F. lateritium-2317, F, moniliforme-379, F, oxysporum-93, F. oxysporum-738, F. oxysporum-126, F, solani-51, F. solani-339, F, solani-2584 and F. stilboide-2169 on soybean (Glycine max) in unsterile and sterilized soils and in soils with or without arbuscular mycorrhizal (AM) inoculation with Glomus mosseae, in a greenhouse trial. Plant dry weight of non AM soybean was unaffected by the presence of any Fusarium. In contrast, AM colonization increased under all experimental conditions when F. oxysporum-738, F. oxysporum-126 or F. stilboide-2169 was used, and AM plant shoot dry weight increased in the presence of F, oxysporum-93, F, oxysporum-738, F, oxysporum-126 or F. solani-51. Synergistic effect of some Fusarium strains on G. mosseae but not effect of the AM fungus on the saprotrophic fungi were found. C1 CSIC, Estac Expt Zaidin, Dept Microbiol, E-18008 Granada, Spain. Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. RP Ocampo, JA, CSIC, Estac Expt Zaidin, Dept Microbiol, Prof Albareda 1, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 24 TC 18 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT 76120, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 1998 VL 24 IS 2 BP 235 EP 245 PG 11 SC Microbiology GA ZP493 UT ISI:000073759000003 ER PT J AU Vazquez, R Kingsburgh, RL Lopez, JA TI Spectrophotometry of the planetary nebula KjPn 8 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE ISM, abundances; planetary nebulae, individual, KjPn 8 ID HYDROGENIC IONS; ABUNDANCES AB Flux-calibrated low-resolution spectra covering the optical wavelength range from 3400 to 7500 Angstrom have been obtained over the central region and the surroundings of the extraordinary planetary nebula (PN) KjPn 8 (PNG 112.5-00.1). The spectrum from the core is of low excitation with T-e(N II)= 8000 K and n(e)(S II)= 550 cm(-3). KjPn 8 is found to be a Type IPN according to the original classification scheme of Peimbert & Torres-Peimbert, with enriched He/H and N/O ratios with respect to mean values for PN. Increased O/H, Ne/H and Ar/H ratios over those of average PN reflect the possible metal-rich environment from which the progenitor star formed, and also are similar to those found in the extreme Type I PN He 2-111. The N/H ratio is found to be only moderately high compared to the average PN and consequently, the large O abundance pulls the N/O ratio towards the lower limit of the criterion for Type I planetary nebulae (PNe) in this case. In addition, the spectra of some knots and faint regions ia the KjPn 8 surroundings are presented, which show only a few spectral lines. Low electron densities ranging from 100 to 300 cm(-3) have been derived in these outer regions. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Ensenada 22800, Baja California, Mexico. York Univ, Dept Phys & Astron, N York, ON M3J 1P3, Canada. RP Vazquez, R, CSIC, Inst Astrofis Andalucia, Apdo Postal 3004, E-18080 Granada, Spain. NR 24 TC 5 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAY 21 PY 1998 VL 296 IS 3 BP 564 EP 568 PG 5 SC Astronomy & Astrophysics GA ZR687 UT ISI:000074003700010 ER PT J AU Romero, E Dios, G Mingorance, MD Matallo, MB Pena, A Sanchez-Rasero, F TI Photodegradation of mecoprop and dichlorprop on dry, moist and amended soil surfaces exposed to sunlight SO CHEMOSPHERE LA English DT Article DE phenoxyacid herbicides; photodegradation; soil mecoprop; dichlorprop ID DISSIPATION; PHOTOLYSIS AB The effects of environmental conditions on the photodecomposition of two phenoxy-alkanoic acid herbicides were investigated on different soil surfaces conditions under sunlight exposition. A technique has been developed to study this process on moist nonsterile soil surfaces. A slow rate of disappeareance occurs in the three soils exposed to sunlight in absence of water. Photolysis of these herbicides is controlled by soil texture and its adsorption capacity. The organic matter does not have a sensitizing effect on the photodecomposition of these herbicides on dry soil surfaces. On nonsterile moist soil surfaces exposed to sunlight, the photolytic process prevails in the two first days of exposure and the transformation kinetics fits the Hoerl function better than the first-order exponential equation. (C) 1998 Elsevier Science Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Inst Biol, Sao Paulo, Brazil. RP Romero, E, CSIC, Estac Expt Zaidin, Prof Albareda 1, E-18008 Granada, Spain. NR 20 TC 18 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0045-6535 J9 CHEMOSPHERE JI Chemosphere PD AUG PY 1998 VL 37 IS 3 BP 577 EP 589 PG 13 SC Environmental Sciences GA ZV721 UT ISI:000074334400019 ER PT J AU Campello, TR Fittipaldi, H O'Valle, F Carvia, RE Nogales, FF TI Extrauterine (tubal) placental site nodule SO HISTOPATHOLOGY LA English DT Article DE fallopian tube; implantation site; intermediate trophoblast; placental site nodule AB Aims: The clinicopathological and immunohistochemical features of the second case of placental site nodule (PSN) of extrauterine, tubal location are presented, Methods and results: The lesion was incidentally found in the right tube during a cesarean section and eventual tubal ligation in a 23-year-old women gesta 2 para 1, after an uneventful 39-week intrauterine pregnancy, Grossly, the right Fallopian tube had a 1 cm dilatation filled by necrotic material, Microscopically, the lumen of the Fallopian tube was effaced and replaced by a rim of pleomorphic intermediate trophoblastic (IT) cells with pseudoinvasive parietal features which were positive for human placental lactogen, placental alkaline phosphatase, epithelial membrane antigen and CAM5,2. The Ki67 index was 3%, Conclusion: Due to its bizarre microscopic appearance, this lesion should be included in the differential diagnosis with malignant conditions, Both origins from a previous subclinical extrauterine tubal pregnancy and a possible migration of IT from a uterine implantation are considered. C1 Univ Fed Pernambuco, Dept Pathol, Recife, PE, Brazil. Univ Hosp, Granada, Spain. RP Nogales, FF, Fac Med, Dept Anat Patol, Granada 18012, Spain. NR 6 TC 7 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0309-0167 J9 HISTOPATHOLOGY JI Histopathology PD JUN PY 1998 VL 32 IS 6 BP 562 EP 565 PG 4 SC Cell Biology; Pathology GA ZW658 UT ISI:000074433700012 ER PT J AU Fracchia, S Mujica, MT Garcia-Romera, I Garcia-Garrido, JM Martin, J Ocampo, JA Godeas, A TI Interactions between Glomus mosseae and arbuscular mycorrhizal sporocarp-associated saprophytic fungi SO PLANT AND SOIL LA English DT Article DE Arbuscular mycorrhizas; Glomus mosseae; Glycine max; Saprophytic fungi ID TRICHODERMA-AUREOVIRIDE; GROWTH; ROOTS; INTRARADICES; STIMULATION; INOCULATION; GERMINATION; INFECTION; SOLANI; TRAPPE AB The saprophytic fungi Wardomyces inflatus (Marchal) Hennebert, Paecilomyces farinosus (Holm & Gray) A. H. S. Brown & G. Sm., Gliocladium roseum Bain., sterile dark mycelium (SDM-54), Trichoderma pseudokoningii Rifai and Trichoderma harzianum Rifai were isolated from sporocarps of Glomus mosseae. The effect of saprophytic fungi on G. mosseae spore germination was tested on water agar. Wardomyces inflatus decreased the percent germination of G. mosseae spores; G. roseum, T. pseudokoningii and T. harzianum had no effect on germination; and P. farinosus and SDM-54 increased the percentage of spore germination of G. mosseae after 4 d. Wardomyces inflatus significantly decreased hyphal length of spores which germinated: but no other saprophytic fungi affected hyphal growth. Trichoderma pseudokoningii, T: harzianum, Il farinosus and SDM-54 increased the number of auxiliary cells formed by G. mosseae. The effect of saprophytic fungi on arbuscular mycorrhizal colonization of soybean was studied in a greenhouse trial. The percentage of soybean root length colonized was decreased by W. inflatus, unaffected by SDM-54 and T. harzianum, and increased by P. farinosus. Gliocladium roseum decreased root length colonized when plants were 12 wk old, and T. pseudokoningii increased colonization of roots when plants were 4 wk old. Antagonistic, synergistic and neutral actions of G.. mosseae upon the saprophytic fungi were observed. The population of T. harzianum decreased and the populations of T. pseudokoningii and SDM-54 increased in the presence of G. mosseae. Our results indicate a complex interaction between G. mosseae and associated saprophytic fungi. C1 Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. CSIC, Estac Expt Zaidin, Dept Microbiol, E-18008 Granada, Spain. RP Fracchia, S, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, 41 2 Pabellon, RA-1428 Buenos Aires, DF, Argentina. NR 33 TC 17 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0032-079X J9 PLANT SOIL JI Plant Soil PD MAR PY 1998 VL 200 IS 2 BP 131 EP 137 PG 7 SC Agronomy; Plant Sciences; Soil Science GA 101BK UT ISI:000074849600002 ER PT J AU Lopez, R Rosado, M Riera, A Noriega-Crespo, A Raga, AC Estalella, R Anglada, G Le Coarer, E Langarica, R Tinoco, S Canto, J TI HH 262: The red lobe of the L1551 IRS 5 outflow SO ASTRONOMICAL JOURNAL LA English DT Article DE ISM : individual (HH 262, L1551 IRS 5); ISM : jets and outflows ID HERBIG-HARO OBJECTS; PROPER MOTIONS; HL TAURI; REGION; FLOW; CLOUD; JET; CO AB HH 262 is a group of emitting knots located approximately 3.'5 to the northeast of the L1551 IRS 5 source. We present a detailed study of the kinematic properties of HH 262, based on proper-motion measurements and on high-resolution imaging Fabry-Perot observations in the [S II] 6717 Angstrom line. From these observations, we conclude that it indeed appears to be the case that HH 262 is associated with the red lobe of the L1551 IRS 5 outflow. C1 Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Politecn Catalunya, Dept Fis & Engn Nucl, Vilanova I La Geltru, Spain. CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Observ Grenoble, F-38041 Grenoble 9, France. RP Lopez, R, Univ Barcelona, Dept Astron & Meteorol, Ave Diagonal 647, E-08028 Barcelona, Spain. NR 27 TC 6 PU UNIV CHICAGO PRESS PI CHICAGO PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD AUG PY 1998 VL 116 IS 2 BP 845 EP 853 PG 9 SC Astronomy & Astrophysics GA 115CW UT ISI:000075646800023 ER PT J AU Rodriguez, E Gonzalez-Bedolla, SF Lopez-Gonzalez, MJ TI Stromgren photometric study of BS Aqr SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE delta Scu; stars : individual : BS Aqr; stars : oscillations; techniques : photometric ID AMPLITUDE DELTA-SCUTI; PULSATING STARS; UVBY AB Simultaneous uvby photometric observations of the high amplitude delta Set star BS Aqr have been collected and new times of light maxima were obtained. Additionally, some H-beta observations are also presented. The light curves have been analysed and the physical parameters of this star are determined. The results indicate that BS Aqr is an evolved monoperiodic delta Set star, with solar abundances, pulsating radially in the fundamental mode. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Astron Inst, Mexico City 4510, DF, Mexico. RP Rodriguez, E, CSIC, Inst Astrofis Andalucia, POB 3004, E-18080 Granada, Spain. NR 32 TC 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG 20 PY 1998 VL 336 IS 3 BP 911 EP 914 PG 4 SC Astronomy & Astrophysics GA 118FL UT ISI:000075827700025 ER PT S AU Vazquez, R Miranda, LF Torrelles, JM Eiroa, C Lopez, JA TI Radio continuum and long-slit optical spectroscopy of the planetary nebulae Cn 3-1 and M 3-27 SO PLANETARY NEBULAE SE IAU SYMPOSIA LA English DT Article C1 Inst Astrofis Andalucia, CSIC, Granada 18080, Spain. Univ Complutense Madrid, Fac Ciencias Fis, Dept Astrofis, E-28040 Madrid, Spain. Univ Autonoma Madrid, Madrid, Spain. UNAM, Astron Inst, Mexico City, DF, Mexico. RP Vazquez, R, Inst Astrofis Andalucia, CSIC, Apartado Postal 3004, Granada 18080, Spain. NR 0 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 J9 IAU SYMP PY 1997 IS 180 BP 283 EP 283 PG 1 SC Astronomy & Astrophysics GA BL56K UT ISI:000075895400136 ER PT J AU Rodriguez, LF D'Alessio, P Wilner, DJ Ho, PTP Torrelles, JM Curiel, S Gomez, Y Lizano, S Pedlar, A Canto, J Raga, AC TI Compact protoplanetary disks around the stars of a young binary system SO NATURE LA English DT Article ID MAIN-SEQUENCE STARS; L1551 IRS-5; MOLECULAR OUTFLOWS; FORMING REGIONS; HL TAURI; ACCRETION; MULTIPLICITY; SEARCH AB Planet formation is believed to occur in the disks of gas and dust that surround young salar-type stars(1). Most stars, however, form in multiple systems(2-5), where the presence of a close companion could affect the structure of the disk(6-8) and perhaps interfere with planet formation. It has been difficult to investigate this because of the resolution needed Here we report interferometric observations (at a wavelength of 7 mm) of the core of the star-forming region L1551. We have achieved a linear resolution of seven astronomical units (less than the diameter of Jupiter's orbit). The core of L1551 contains two distinct disks, with a separation of 45 AU; these appear to be associated with a binary system. Both disks are spatially resolved, with semi-major axes of about 10 AU, which is about a factor of ten smaller than disks around isolated stars(9-12). The disk masses are of order 0.05 solar masses, which could be enough to form planetary systems like our own. C1 Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UIB, CSIC, IMEDEA, Palma de Mallorca 07071, Spain. Univ Manchester, Nuffield Radio Astron Labs, Macclesfield SK11 9DL, Cheshire, England. RP Rodriguez, LF, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico. NR 30 TC 88 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD SEP 24 PY 1998 VL 395 IS 6700 BP 355 EP 357 PG 3 SC Multidisciplinary Sciences GA 122QW UT ISI:000076083800044 ER PT J AU Delgado, AJ Alfaro, EJ Moitinho, A Franco, J TI Pre-main-sequence stars in the young galactic cluster IC 4996: A CCD photometric study SO ASTRONOMICAL JOURNAL LA English DT Article DE open clusters and associations : individual (IC 4996); stars : pre-main-sequence ID NEBULOSITY; EVOLUTION; RANGE AB The results of a UBV CCD photometric study of the cluster IC 4996 are presented. We obtain new values for the cluster parameters: E(B-V) = 0.71 +/- 0.08, V-O, - M-V = 11.9 +/- 0.1, and age = (7.5 +/- 3) x 10(6) yr. The combined evidence from the photometric diagrams suggests the presence of a number of pre-main-sequence (PMS) cluster members with spectral types similar to A0 to F5. The interpretation of these objects as PMS candidates is further supported by independent results from CCD uvby H beta observations. If confirmed, these stars would bridge the existing gap in the sample of PMS stars, between the coolest Herbig AeBe stars (HAeBe), and the hottest T Tauri stars. These PMS candidates are located some 0.5 and I mag above the main sequence in the V-(B-V) diagram, around the location of spectral types AF. This feature, together with their locations in the (U-B)-(B-V) diagram and the interpretation that they are PMS members, suggest an additional reddening law with a slope alpha = E(U-B)IE(B-V) similar or equal to 0.55, probably caused by circumstellar material. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. RP Delgado, AJ, CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain. NR 37 TC 11 PU UNIV CHICAGO PRESS PI CHICAGO PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD OCT PY 1998 VL 116 IS 4 BP 1801 EP 1809 PG 9 SC Astronomy & Astrophysics GA 128NP UT ISI:000076413100025 ER PT J AU Arana, FE Perez-Victoria, JM Repetto, Y Morello, A Castanys, S Gamarro, F TI Involvement of thiol metabolism in resistance to glucantime in Leishmania tropica SO BIOCHEMICAL PHARMACOLOGY LA English DT Article DE Leishmania tropica; resistance to glucantime; thiol metabolism; extrachromosomal element; buthionine sulfoximine; chlorambucil ID TRYPANOSOMA-CRUZI; MULTIDRUG RESISTANCE; STRUCTURAL-ANALYSIS; DRUG-RESISTANCE; OVOTHIOL-A; GENE; TRYPANOTHIONE; AMPLIFICATION; GLUTATHIONE; DONOVANI AB Clinical resistance to pentavalent antimonials, in the form of pentostam (sodium stibogluconate) or glucantime (N-methylglucamine antimoniate), has long been recognized as a problem in Leishmaniasis. However, the mechanisms of resistance are unclear. We selected in vitro a Leishmania tropica line resistant to 1.2 mg/mL of Sb(V) of glucantime (GLU-R10). The cell line has a stable phenotype for at least 6 months and a resistance index of 1400-fold. The resistant line has no cross-resistance to pentostam or to SbCl3 and SbCl5. The resistance to glucantime was reverted by buthionine sulfoximine (BSO) and chlorambucil (CLB); however, thiol analyses by HPLC of wild-type and GLU-R10 cell lines, in the presence or absence of the drug, showed no differences between these two cell lines. The resistant line had a DNA amplification shown as a circular extrachromosomal element (G-circle) of approximately 22 kb. However, the specific probes for gamma-glutamyl cysteine synthetase, ornithine decarboxylase and trypanothione reductase did not recognize the G-circle amplified in the GLU-R10. The G-circle did not arise from the H region and was not related with P-glycoprotein Pgp-MDR- or Pgp-MRP-like genes. Northern blot analysis of the G-circle showed that a single transcript of approximately 6 kb was overexpressed. in the resistant line. Molecular characterization of the G-circle would lead to the determination of the gene(s) involved in resistance to glucantime in Leishmania. (C) 1998 Elsevier Science Inc. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Univ Chile, Fac Med, Inst Ciencias Biomed, Programa Farmacol Mol & Clin, Santiago 7, Chile. RP Gamarro, F, CSIC, Inst Parasitol & Biomed Lopez Neyra, C Ventanilla 11, Granada 18001, Spain. EM amarro@ipb.csic.es NR 44 TC 15 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0006-2952 J9 BIOCHEM PHARMACOL JI Biochem. Pharmacol. PD NOV 1 PY 1998 VL 56 IS 9 BP 1201 EP 1208 PG 8 SC Pharmacology & Pharmacy GA 132PP UT ISI:000076639000017 ER PT J AU Anglada, G Villuendas, E Estalella, R Beltran, MT Rodriguez, LF Torrelles, JM Curiel, S TI Spectral indices of centimeter continuum sources in star-forming regions: Implications on the nature of the outflow exciting sources SO ASTRONOMICAL JOURNAL LA English DT Article DE ISM : jets and outflows; radio continuum; stars : formation ID HERBIG-HARO OBJECTS; YOUNG STELLAR OBJECTS; BIPOLAR MOLECULAR OUTFLOWS; RADIO-CONTINUUM; IRAS SOURCES; DARK CLOUDS; AMMONIA OBSERVATIONS; VLA OBSERVATIONS; PROPER MOTIONS; L1641 REGION AB We present 6 cm VLA observations of nine regions with molecular or HH outflows that appear to be driven by young stellar objects of low bolometric luminosity. Radio continuum emission at 3.6 cm had been detected previously toward the center of symmetry of 13 outflows in these regions. With the new 6 cm observations we have been able to estimate the spectral index in the 6 to 3.6 cm wavelength range for 11 of these outflow central (Class 0 and Class I) sources. All the spectral indices obtained for these central sources are positive and consistent with partially thick thermal free-free emission. We discuss this result in relation to the current models for the origin of centimeter radio continuum emission in outflow sources. In particular, we find that the observed flux densities of these sources fit very well in the observational correlation between the radio continuum luminosity and the momentum rate of the outflow, and that the results are consistent with the central sources being thermal radio jets. Our data suggest that the ionized part of the jets begins at a distance less than or similar to 10 AU from the star. In addition, we have derived a positive value for the spectral index of HH 32A, indicative of partially thick thermal emission. For the remaining sources detected in the nine fields observed, our results indicate that the emission is, in general, nonthermal, as expected for background extragalactic sources. However, a few of these sources could be related to the star-forming regions studied. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Illes Balears, CSIC, Inst Mediterraneo Estudios Avanzados, E-07071 Palma de Mallorca, Spain. UNAM, Inst Astron, Morelia, Michoacan, Mexico. RP Anglada, G, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004, E-18080 Granada, Spain. NR 91 TC 46 PU UNIV CHICAGO PRESS PI CHICAGO PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 1998 VL 116 IS 6 BP 2953 EP 2964 PG 12 SC Astronomy & Astrophysics GA 147RQ UT ISI:000077512000027 ER PT J AU Groot, PJ Galama, TJ Vreeswijk, PM Wijers, RAMJ Pian, E Palazzi, E van Paradijs, J Kouveliotou, C in't Zand, JJM Heise, J Robinson, C Tanvir, N Lidman, C Tinney, C Keane, M Briggs, M Hurley, K Gonzalez, JF Hall, P Smith, MG Covarrubias, R Jonker, PG Casares, J Masetti, N Frontera, F Feroci, M Piro, L Costa, E Smith, R Jones, B Windridge, D Bland-Hawthorn, J Veilleux, S Garcia, M Brown, WR Stanek, KZ Castro-Tirado, AJ Gorosabel, J Greiner, J Jager, K Bohm, A Fricke, KJ TI The rapid decay of the optical emission from GRB 980326 and its possible implications SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts; gamma rays : observations; radiation mechanisms : nonthermal ID GAMMA-RAY BURST; ASTRONOMY SATELLITE; ACCELERATION AB We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 +/- 0.13 and a constant underlying source at R-c = 25.5 +/- 0.5. Its optical colors 2.1 days after the burst imply a spectral slope of -0.66 +/- 0.70. The gamma-ray spectrum as observed with BATSE shows that it is among the 4% softest bursts ever recorded. We argue that the rapid optical decay may be a reason for the nondetection of some low-energy afterglows of GRBs. C1 Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Natl Inst Nucl & High Energy Phys, Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England. CNR, I-40129 Bologna, Italy. Univ Alabama, Dept Phys, Huntsville, AL 35899 USA. Univ Space Res Assoc, Washington, DC USA. NASA, MSFC, Huntsville, AL 35812 USA. SRON, Utrecht, Netherlands. European So Observ, Santiago 19, Chile. Anglo Australian Observ, Epping, NSW 2121, Australia. Cerro Tololo Interamer Observ, La Serena, Chile. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Univ Toronto, Dept Astron, Toronto, ON M5S 3H8, Canada. Inst Astrofis Canarias, Tenerife, Spain. CNR, Ist Astrofis Spaziale, I-00133 Rome, Italy. Univ Wales, Cardiff CF1 3NS, S Glam, Wales. Univ Bristol, Bristol, Avon, England. Univ Maryland, Dept Astron, College Pk, MD 20742 USA. Ctr Astrophys, Cambridge, MA 02138 USA. INTA, LAEFF, E-28080 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Univ Sternwarte Gottingen, D-37083 Gottingen, Germany. RP Groot, PJ, Univ Amsterdam, Astron Inst Anton Pannekoek, Kruislaan 403, NL-1098 SJ Amsterdam, Netherlands. NR 45 TC 47 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 1998 VL 502 IS 2 PN Part 2 BP L123 EP L127 PG 5 SC Astronomy & Astrophysics GA 152KH UT ISI:000077776200007 ER PT J AU Torrelles, JM Gomez, JF Rodriguez, LF Curiel, S Anglada, G Ho, PTP TI Radio continuum-H2O maser systems in NGC 2071: H2O masers tracing a jet (IRS 1) and a rotating proto-planetary disk of radius 20 AU (IRS 3) SO ASTROPHYSICAL JOURNAL LA English DT Article DE H II regions; ISM : individual (NGC 2071); ISM : jets and outflows; masers; stars : formation ID SHOCKED MOLECULAR-HYDROGEN; VLA OBSERVATIONS; INFRARED SOURCES; HIGH-RESOLUTION; WATER MASERS; NGC-2071; OUTFLOW; STAR; EMISSION; REGIONS AB We have observed simultaneously the 1.3 cm continuum and H2O maser emission toward the core of the star-forming region NGC 2071 using the Very Large Array in its A configuration. Two 1.3 cm continuum sources have been detected in the region, coinciding with the infrared sources IRS 1 and IRS 3, respectively. The radio emission in IRS 3 is consistent with an ionized thermal bipolar radio jet. Two clusters of H2O maser spots are detected, one associated with IRS 1 (22 spots) and the other one associated with IRS 3 (13 spots). The H2O maser distribution in IRS I seems to be tracing at scales of 300 AU the larger scale H-2 outflow observed at a few thousands of AU from the exciting source. On the other hand, the H2O masers in IRS 3 are distributed as an apparent disk of similar or equal to 0." 05 (similar or equal to 20 AU) radius, oriented almost perpendicular to the major axis of the radio jet. There is a clear velocity gradient (similar or equal to 0.35 km s(-1) AU(-1)) along the major axis of the H2O maser distribution, which can be gravitationally bound by a central mass of similar or equal to 1 M-.. These results, together with the low-mass and early evolutionary stage of IRS 3, suggest that masers around this source are tracing a rotating proto-planetary disk within a proto-solar-like system. This represents direct kinematic evidence of the smallest rotating circumstellar disk ever observed around a young stellar object (YSDO). We discuss the dichotomy of H2O masers tracing either outflows or disks around YSOs, based on the evolutionary scheme proposed in our earlier work. We suggested that systems in which H2O masers trace disks are less evolved than those in which masers trace outflows. In this scheme, IRS 3 would then represent a relatively less-evolved object than IRS 1. This prediction is consistent with independent infrared observations showing that IRS 3 is at an earlier phase of evolution. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Nacl Techn Aerospacial, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Torrelles, JM, Univ Illes Balears, CSIC, Inst Mediterraneo Estudios Avanzados, Apartado Correos 3004, E-07071 Palma de Mallorca, Spain. NR 51 TC 49 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 1 PY 1998 VL 505 IS 2 PN Part 1 BP 756 EP 765 PG 10 SC Astronomy & Astrophysics GA 152LF UT ISI:000077778500022 ER PT J AU Segundo, E Martinez-Abarca, F van Dillewijn, P Fernandez-Lopez, M Lagares, A Martinez-Drets, G Niehaus, K Puhler, A Toro, N TI Characterisation of symbiotically efficient alfalfa-nodulating rhizobia isolated from acid soils of Argentina and Uruguay SO FEMS MICROBIOLOGY ECOLOGY LA English DT Article DE competitiveness; insertion sequence; fingerprinting; pH; symbiosis ID 16S RIBOSOMAL-RNA; PHASEOLUS-VULGARIS; MEDICAGO-SATIVA; MELILOTI; TOLERANCE; LEGUMINOSARUM; SYMBIONT; PH AB The diversity, growth and symbiotic behaviour of symbiotically efficient alfalfa-nodulating rhizobia isolated from acid soils of Argentina and Uruguay were analysed. Partial sequencing of the 16S rDNA indicated that these isolates belong to Sinorhizobium meliloti species. IS-fingerprinting analysis revealed a high diversity among the isolates but some of them appear related to inoculant strains currently used in the region. The S. meliloti isolates showed a decreased growth rate with increasing acidity. They were, however, able to nodulate alfalfa at pH 5.6, but showed a delayed nodulation and decreased nodule number typical of S. meliloti strains. The impaired nodulation of S. meliloti at pH 5.6 did not result in a reduction of alfalfa dry matter production or nitrogen content. However, significant differences were observed for the relative symbiotic effectiveness of the strains analysed. LPU63 (Argentina) was the most effective among the isolates and exhibited a high nodulation competitiveness at both neutral and acidic pH. These results suggest that the isolate LPU63 may be a potential efficient inoculant for alfalfa in acid soils. (C) 1999 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, E-18008 Granada, Spain. Natl Univ La Plata, Fac Ciencias Exactas, Inst Bioquim & Biol Mol, RA-1900 La Plata, Argentina. Inst Invest Bioquim Clemente Estable, Montevideo, Uruguay. Univ Bielefeld, Lehrstuhl Genet, D-33501 Bielefeld, Germany. RP Toro, N, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, Prof Albareda 1, E-18008 Granada, Spain. NR 25 TC 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-6496 J9 FEMS MICROBIOL ECOL JI FEMS Microbiol. Ecol. PD FEB PY 1999 VL 28 IS 2 BP 169 EP 176 PG 8 SC Microbiology GA 166HH UT ISI:000078569800008 ER PT J AU Guerrero, MA Vazquez, R Lopez, JA TI The kinematics of point-symmetric planetary nebulae SO ASTRONOMICAL JOURNAL LA English DT Article DE ISM : kinematics and dynamics; planetary nebulae : individual (He 1-1, He 2-429, PC 19, Pe 1-17) ID EPISODIC JET; BIPOLAR; FLEMING-1 AB Four planetary nebulae (PNe) with conspicuous point-symmetric morphology are studied in this paper through high-quality imagery and long-slit echelle spectroscopy. Point symmetry is also found in the velocity space, and this is related to particular forms of bipolar collimated outflows. Morphology and kinematics together reveal the presence of collimated bipolar ejections in an episodic way with indications of rotation or displacement of the symmetry axis of the outflow. Point symmetry is currently known to occur in a wide variety of PNe and the convenience of a reevaluation of point-symmetric PNe as a main morphological class is pointed out. C1 Inst Astrofis Canarias, E-382000 Tenerife, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22800, Baja California, Mexico. RP Guerrero, MA, Inst Astrofis Canarias, E-382000 Tenerife, Spain. NR 23 TC 12 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 1999 VL 117 IS 2 BP 967 EP 973 PG 7 SC Astronomy & Astrophysics GA 172CT UT ISI:000078905300024 ER PT J AU Zerbi, FM Rodriguez, E Garrido, R Martin, S Ferro, AA Sareyan, JP Krisciunas, K Akan, MC Evren, S Ibanoglu, C Keskin, V Pekunlu, R Tunca, Z Luedeke, K Paparo, M Nuspl, J Guerrero, G TI The gamma Dor variable HR 8799: results from a multisite campaign SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : individual : HR 8799; stars : oscillations; stars : variables : other ID STARS; DORADUS; VARIABILITY; PHOTOMETRY AB In this paper, we present the results of a multisite photometric campaign devoted to the gamma Doradus type variable HR 8799. From Johnson and Stromgren data, we were able to identify three independent frequencies (f(i) = 1.9791 cycle d(-1), f(2) = 1.7268 cycle d(-10) and f(3) = 1.6498 cycle d(-1)) as well as another signal, which we are able to identify as the coupling term between two of the frequencies (f(4) = f(1) - f(2) = 0.2479 cycle d(-1)). These four frequencies are able to account for all of the observed variations down to the la significance level. We discuss another possible interpretation of these frequencies using a model of quasi-stochastic amplitude modulation. In this scenario, we are able to show that HR 8799 might be pulsating with two independent frequencies, one of which undergoes amplitude modulation similar to other gamma Dor objects. In addition, we discuss a preliminary mode identification based on the observed colour curves. Finally, 18 simultaneous, high-resolution echelle spectra were collected on two nights and we qualitatively compare the radial velocities from these data with our photometry. C1 Osserv Astron Brera, I-23807 Merate, Italy. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Guanajuato, IFUG, Dept Astron, Guanajuato 36000, Mexico. Observ Cote Azur, F-0634 Nice 4, France. Univ Washington, Dept Astron, Seattle, WA 98195 USA. Ege Univ Observ, Izmir, Turkey. Konkoly Observ Budapest, H-1525 Budapest, Hungary. RP Zerbi, FM, Osserv Astron Brera, Via Bianchi 46, I-23807 Merate, Italy. NR 17 TC 22 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD FEB 21 PY 1999 VL 303 IS 2 BP 275 EP 283 PG 9 SC Astronomy & Astrophysics GA 175QY UT ISI:000079107500013 ER PT J AU Torrelles, JM Gomez, JF Garay, G Rodriguez, LF Curiel, S Cohen, RJ Ho, PTP TI Systems with H2O maser and 1.3 centimeter continuum emission in Cepheus A SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (Cepheus A); ISM : jets and outflows; ISM : molecules; radio continuum : stars; stars : pre-main-sequence ID STAR-FORMING REGION; HERBIG-HARO OBJECTS; THERMAL RADIO JET; A HW2; OUTFLOW; BIPOLAR; SCALE; EAST; OH AB We report continuum (1.3 cm) and H2O maser line observations, made with the Very Large Array (A configuration), toward the cluster of radio continuum sources in the star-forming region Cepheus A East. The 1.3 cm continuum emission is detected toward HW2, HW3b, HW3c, HW3d, and HW9. In addition, a new continuum source (Cep A:VLA 1), undetected previously, is observed at this wavelength. We detected three spatial clusters of H2O masers that are associated with the 1.3 cm continuum sources HW2, HW3b, and HW3dii (the brightest component of HW3d), indicating that these objects may harbor an energy source as suggested by Garay and coworkers. The spatial distribution of the H2O masers with respect to the continuum emission is different in each one of these objects. Toward source HW2 the H2O masers are spread over similar to 1 " and aligned in a direction almost perpendicular to the associated radio jet. In HW3b the H2O masers are spread over a more compact region (-0." 5) and aligned along the major axis of the elongated radio continuum emission. The masers associated with the compact object HW3dii are distributed over a compact region (similar to 0." 5) but do not show any clear spatial trend. By comparing the H2O (this paper) and OH maser distributions in the region, we propose that object HW2, with the strongest H2O-OH maser activity, could represent the "oldest" young stellar object of the region, while HW3b, with no reported OH maser activity, could be the "youngest" source of these three objects. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Univ Chile, Dept Astron, Santiago, Chile. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Manchester, Nuffield Radio Astron Labs, Jodrell Bank, Macclesfield SK11 9DL, Cheshire, England. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Torrelles, JM, Univ Illes Balears, CSIC, Inst Mediterraneo Estudios Avanzados, E-07071 Palma de Mallorca, Spain. NR 33 TC 32 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1998 VL 509 IS 1 PN Part 1 BP 262 EP 269 PG 8 SC Astronomy & Astrophysics GA 178DE UT ISI:000079250400025 ER PT J AU Del Papa, MF Balague, LJ Sowinski, SC Wegener, C Segundo, E Abarca, FM Toro, N Niehaus, K Puhler, A Aguilar, OM Martinez-Drets, G Lagares, A TI Isolation and characterization of alfalfa-nodulating rhizobia present in acidic soils of Central Argentina and Uruguay SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID POLYMERASE CHAIN-REACTION; PHASEOLUS-VULGARIS L; 16S RIBOSOMAL-RNA; MEDICAGO-SATIVA; MELILOTI; PH; TOLERANCE; STRAINS; GENES; BRADYRHIZOBIUM AB We describe the isolation and characterization of alfalfa-nodulating rhizobia from acid soils of different locations in Central Argentina and Uruguay, A collection of 465 isolates was assembled, and the rhizobia were characterized for acid tolerance, Growth tests revealed the existence of 15 acid-tolerant (AT) isolates which were able to grow at pH 5.0 and formed nodules in alfalfa with a low rate of nitrogen fixation, Analysis of those isolates, including partial sequencing of the genes encoding 16S rRNA and genomic PCR-fingerprinting with MBOREP1 and BOXC1 primers, demonstrated that the new isolates share a genetic background closely related to that of the previously reported Rhizobium sp. Or191 recovered from an acid soil in Oregon (B. D. Eardly, J. P. Young, and R. K. Selander, Appl. Environ. Microbiol. 58:1809-1815, 1992), Growth curves, melanin production, temperature tolerance, and megaplasmid profiles of the AT isolates were all coincident with these characteristics in strain Or191, In addition to the ability of all of these strains to nodulate alfalfa (Medicago sativa) inefficiently, the AT isolates also nodulated the common bean and Leucaena leucocephala, showing an extended host range for nodulation of legumes. In alfalfa, the time course of nodule formation by the AT isolate LPU 83 showed a continued nodulation restricted to the emerging secondary roots, which was probably related to the low rate of nitrogen fixation by the largely ineffective nodules, Results demonstrate the complexity of the rhizobial populations present in the acidic soils represented by a main group of N-2-fixing rhizobia and a second group of ineffective and less-predominant isolates related to the AT strain Or191. C1 Natl Univ La Plata, Fac Ciencias Exactas, Inst Bioquim & Biol Mol, RA-1900 La Plata, Argentina. Inst Invest Biol Clemente Estable, Div Bioquim, Montevideo 11600, Uruguay. Univ Bielefeld, Fak Biol, Lehrstuhl Genet, D-33501 Bielefeld, Germany. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. RP Lagares, A, Natl Univ La Plata, Fac Ciencias Exactas, Inst Bioquim & Biol Mol, Calles 47 & 115, RA-1900 La Plata, Argentina. EM lagares@biol.unlp.edu.ar NR 49 TC 35 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 USA SN 0099-2240 J9 APPL ENVIRON MICROBIOL JI Appl. Environ. Microbiol. PD APR PY 1999 VL 65 IS 4 BP 1420 EP 1427 PG 8 SC Biotechnology & Applied Microbiology; Microbiology GA 183AE UT ISI:000079530000009 ER PT J AU Hernandez-Laguna, A Alfonso-Mendez, L Otto, P TI Soft Coulomb hole method applied to theoretical equilibrium geometries of singlet diatomic molecules SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRON CORRELATION; CORRELATION ENERGIES; POLYMERS AB It has been demonstrated that the soft Coulomb hole method is a reliable and efficient approach to calculate the electron correlation energy for atoms and molecules. In this method the perturbation operator -e(-wr2)12/r(12) is introduced, where omega determines the size of the Coulomb hole. The set of parameters for omega has been redetermined to calculate equilibrium bond distances. Calculations have been performed for 41 homo- and heteronuclear singlet diatomic molecules and ions (X (1)Sigma(+)), including atoms of the second and third periods of the periodic table. The soft Coulomb hole correlation energies are compared to the corresponding empirical correlation energies. In general, calculated equilibrium bond distances are in better agreement with the experimental values than Hartree-Fock and Moller-Plesset-2 results. With respect to Moller-Plesset-3, the soft Coulomb hole method gives slightly larger values for the average deviations, except for the homonuclear series. (C) 1999 American Institute of Physics. [S0021-9606(99)30214-2]. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Erlangen Nurnberg, D-91055 Erlangen, Germany. Inst Cubana Invest Derivados Cana Azucar, La Habana, Cuba. RP Hernandez-Laguna, A, CSIC, Estac Expt Zaidin, C Prof Albareda 1, E-18008 Granada, Spain. NR 27 TC 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD APR 15 PY 1999 VL 110 IS 15 BP 7160 EP 7165 PG 6 SC Physics, Atomic, Molecular & Chemical GA 184QZ UT ISI:000079625600008 ER PT J AU Umezawa, ES Bastos, SF Camargo, ME Yamauchi, LM Santos, MR Gonzalez, A Zingales, B Levin, MJ Sousa, O Rangel-Aldao, R da Silveira, JF TI Evaluation of recombinant antigens for serodiagnosis of Chagas' disease in south and central America SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID TRYPANOSOMA-CRUZI ANTIGENS; DEFINED ANTIGENS; ETIOLOGIC AGENT; BLOOD; SERA; DIAGNOSIS; EXPRESSION; ANTIBODIES; INFECTION; CLONING AB The commercially available diagnostic tests for Chagas' disease employ whole extracts or semipurified fractions of Trypanosoma cruzi epimastigotes. Considerable variation in the reproducibility and ri liability of these tests has been reported by different research laboratories, mainly due to cross-reactivity with other pathogens and standardization of the reagents. The use of recombinant antigens for the serodiagnosis of Chagas' disease is recommended to increase the sensitivity and specificity of serological tests. Expressed in Escherichia call, as fusion products with glutathione S-transferase. sir T. cruzi recombinant antigens (H49, JL7, A13, B13, JL8, and 1F8) were evaluated in an enzyme-linked immunosorbent assay for Chagas' disease, The study was carried out with a panel of 541 serum samples of chagasic and nonchagasic patients from nine countries of Latin America (Argentina, Bolivia, Brazil, Chile, Colombia, El Salvador, Guatemala, I Honduras, and Venezuela). The optimal concentration of each recombinant antigen for coating of plates was determined with the help of 84% labelled recombinant proteins. While the specificity of the epimastigote antigen was 84% because of false positives from leishmaniasis cases, for the recombinant antigens it varied from 96.2 to 99.6%. Recombinant antigens reacted with 79 to 100% of serum samples from chronic chagasic patients. In this way, it is proposed that a mixture of a few T. cruzi recombinant antigens should he employ ed in a diagnostic kit to minimize individual variation and promote high sensitivity in the diagnosis of Chagas' disease. C1 FMUSP, Inst Med Trop Sao Paulo, BR-05403000 Sao Paulo, Brazil. UNIFESP, Dept Micro Imuno & Parasitol, Escola Paulista Med, Sao Paulo, Brazil. USP, Inst Quim, Sao Paulo, Brazil. CSIC, Inst Parasitol & Biomed, Granada, Spain. Inst Invest Engn Genet & Biol Mol, Buenos Aires, DF, Argentina. Univ Panama, CIDEP, Panama City, Panama. Univ Simon Bolivar, Caracas, Venezuela. RP Umezawa, ES, FMUSP, Inst Med Trop Sao Paulo, Av Dr Eneas Carvalho Aguiar 470, BR-05403000 Sao Paulo, Brazil. NR 31 TC 33 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 USA SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD MAY PY 1999 VL 37 IS 5 BP 1554 EP 1560 PG 7 SC Microbiology GA 187NG UT ISI:000079792400058 ER PT J AU Gomez, JF Sargent, AI Torrelles, JM Ho, PTP Rodriguez, LF Canto, J Garay, G TI Disk and outflow in Cepheus A-HW2: Interferometric SiO and HCO+ observations SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (Cepheus A); ISM : jets and outflows; ISM : molecules; stars : pre-main-sequence ID MOLECULAR LINE EMISSION; STAR-FORMING REGION; PROTOPLANETARY DISKS; MASS OUTFLOW; OBJECTS; BIPOLAR; MODELS; MASERS; CLOUDS; JETS AB This paper reports observations of the HCO+ (1 --> 0) and SiO (2 --> 1) lines and of continuum emission at lambda= 3.4 mm toward the Cepheus A East star-forming region. The HCO+ line shows emission up to velocities of similar to 50 km s(-1) relative to the ambient cloud velocity. The spatial distribution of the high-velocity gas is bipolar, centered on HW2, and extends for similar to 1' along P.A. = 55 degrees-60 degrees. The orientation of this molecular outflow is very similar to that of the radio jet and CO emission associated with HW2. This confirms that current mass loss from HW2 takes place in the northeast-southwest direction. The momentum rate of the HCO+ outflow is 1.3 x 10(-2) M-. km s(-1) yr(-1), 20 times larger than that of the ionized jet from HW2, suggesting that the jet could be largely neutral. Peaks of HCO+ emission coincide with some of the radio-continuum sources in the region, consistent with outflow-ambient gas interaction. Multiple episodes of outflow activity from either one precessing source or a number of powering sources would explain the detection of moderate-velocity HCO+ emission toward the HW7 chain of sources. The continuum emission at 3.4 mm is strongly peaked toward HW2, confirming that this is the most likely powering source for the outflow. The SiO emission is barely elongated along P.A. = -33 degrees, i.e., almost perpendicular to the HCO+ outflow. A velocity trend consistent with a gradient of similar to 31 km s(-1) over 2 " is detected along the major axis of the SiO structure; these motions could be bound by 200 M-.. Published H2O and CS observations support our suggestion that this represents the outer, similar to 750 AU radius, part of a circumstellar disk, although further observations are needed to confirm this interpretation. C1 INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Illes Balears, CSIC, Inst Mediterraneo Estudios Avanzados, E-07071 Palma de Mallorca, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Natl Autonomous Univ Mexico, Astron Inst, Mexico City 04510, DF, Mexico. Univ Chile, Dept Astron, Santiago, Chile. RP Gomez, JF, INTA, Lab Astrofis Espacial & Fis Fundamental, Apdo Correos 50727, E-28080 Madrid, Spain. NR 35 TC 31 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1999 VL 514 IS 1 PN Part 1 BP 287 EP 295 PG 9 SC Astronomy & Astrophysics GA 192BE UT ISI:000080057000024 ER PT J AU Que, XC Kim, DJ Alagon, A Hirata, K Shike, H Shimizu, C Gonzalez, A Burns, JC Reed, SL TI Pantropic retroviral vectors mediate gene transfer and expression in Entamoeba histolytica SO MOLECULAR AND BIOCHEMICAL PARASITOLOGY LA English DT Article DE Entamoeba; amebiasis; retroviral vectors; transformation ID STABLE EPISOMAL TRANSFECTION; I-HYPERSENSITIVE SITES; INSERTIONAL MUTAGENESIS; RIBOSOMAL-RNA; HIGH-TITER; INTEGRATION; ZEBRAFISH; DISPAR; CELLS; DNA AB Transformation of Entamoeba histolytica has been previously reported, but the foreign genes have all been replicated episomally, Pantropic retroviral vectors based on the Moloney murine leukemia virus with the envelope glycoprotein of vesicular stomatitis virus (VSV-G) have an extremely broad host range and can be concentrated to high titer. To investigate whether these pseudotyped, pantropic vectors can mediate gene transfer and;expression in E. histolytica, we constructed a retroviral vector, in which a hygromycin phosphotransferase is expressed from the E. histolytica actin promoter. Data confirm the infection, integration, and expression of a foreign gene mediated by the provirus. To our knowledge, this is the most evolutionarily distant example of successful integration and expression of a mammalian retrovirus. Pantropic retroviral vectors may thus facilitate genetic analysis in species lacking transformation systems. (C) 1999 Published by Elsevier Science B.V. All rights reserved. C1 Univ Calif San Diego, San Diego Med Ctr, Dept Pathol, Div Infect Dis, San Diego, CA 92103 USA. Inst Biotecnol, Cuernavaca, Morelos, Mexico. Univ Calif San Diego, Dept Pediat, San Diego, CA 92103 USA. CSIC, Inst Parasitol & Biomed, Granada, Spain. RP Reed, SL, Univ Calif San Diego, San Diego Med Ctr, Dept Pathol, Div Infect Dis, 214 Dickinson St, San Diego, CA 92103 USA. NR 36 TC 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-6851 J9 MOL BIOCHEM PARASITOL JI Mol. Biochem. Parasitol. PD APR 30 PY 1999 VL 99 IS 2 BP 237 EP 245 PG 9 SC Biochemistry & Molecular Biology; Parasitology GA 194XT UT ISI:000080220600007 ER PT J AU Marti, J Rodriguez, LF Torrelles, JM TI Cross-calibrated VLA observations of H2O maser and 1.3 cm continuum emission in IRAS 18162-2048 (=HH80-81IRS) SO ASTRONOMY AND ASTROPHYSICS LA English DT Letter DE stars : individual : IRAS 18162-2048; stars : individual :; HH80-81IRS; stars : formation; ISM : Herbig-Haro objects; ISM : jets and outflows ID YOUNG STELLAR OBJECTS; HERBIG-HARO OBJECTS; THERMAL RADIO JET; CEPHEUS-A HW2; GGD 27-IRS; GGD27-IRS; STAR; SPECTROSCOPY; HH-80-NORTH; DOWNSTREAM AB We report simultaneous continuum (1.3 cm) and H2O maser line observations, made with the Very Large Array (A configuration), toward IRAS 18162-2048, the luminous exciting source of the HH 80-81 complex. The continuum observations, cross-calibrated with the H2O maser emission, provide information of the thermal jet of this young massive star with unprecedented angular resolution and fidelity. We find that the jet is already collimated on scales smaller than 100 AU. The analysis of the new 1.3 cm data and of previously obtained 3.6 cm data show that the source has the frequency dependences in major axis and flux density that characterize biconical jets. In particular, we find theta(maj) proportional to nu(-0.7+/-0.1) and S-nu proportional to nu(0.8+/-0.1) An improved determination of the mass loss rate in ionized gas, (M) over dot(ion) similar or equal to 9 x 10(-7) M. yr(-1), is provided with these new observations. As it was known from previous studies, the H2O maser emission does not coincide with the thermal jet but with a faint source of radio continuum emission displaced by similar to 7 " to the northeast of the thermal jet. The H2O masers appear in two compact clusters separated by similar to 20 mas. One of the clusters is formed by spots in a linear geometry. The kinematics of these maser spots and their large blueshift with respect to the radial velocity of the parental molecular cloud suggest that they trace material accelerated by outflow phenomena, instead of a possible disk. C1 Univ Jaen, Escula Politecn Superior, Dept Fis, E-23071 Jaen, Spain. UNAM, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, IEEC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. CSIC, Inst Astrofis Andalucia, Madrid, Spain. RP Marti, J, Univ Jaen, Escula Politecn Superior, Dept Fis, Calle Virgin Cabeza 2, E-23071 Jaen, Spain. NR 27 TC 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 1999 VL 345 IS 1 BP L5 EP L8 PG 4 SC Astronomy & Astrophysics GA 195UL UT ISI:000080270500002 ER PT J AU Vazquez, R Torrelles, JM Rodriguez, LF Gomez, Y Lopez, JA Miranda, LF TI Radio continuum and recombination line observations of the polypolar planetary nebula NGC 2440 SO ASTROPHYSICAL JOURNAL LA English DT Article DE planetary nebulae : individual (NGC 2440); radio lines : ISM ID NGC-2440; VELOCITY; NGC-6302; EVOLUTION; NGC-7027 AB H92 alpha and He92 alpha recombination lines and lambda 3.6 cm continuum observations have been carried out with the Very Large Array (synthesized beam 6."8 x 4."2, PA 74 degrees) toward the polypolar planetary nebula NGC 2440. The H92 alpha and He92 alpha lines have been detected, for the first time in this nebula, over a region of theta similar or equal to 14" around its geometric center. The lambda 3.6 cm continuum emission is detected over a region of similar or equal to 65" x 40", similar in extent to the optical emission. Physical parameters of the nebula have been derived for the region in which the recombination lines were detected. From the line to continuum ratio, an electron temperature of similar or equal to 16,000 K and a single ionized helium abundance Y+ similar or equal to 0.14 are obtained. A relative extinction map of NGC 2440 has also been obtained from the ratio of the lambda 3.6 cm continuum acid Ha images. A higher relative extinction in the central region traces the dense and dusty environment of an apparent central "toroid." The velocity field obtained from the H92a line suggests that the central toroidal structure has a distorted, noncircular shape. The polypolar characteristics of this nebula are discussed and compared with those of similar objects. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. UNAM, Astron Inst, Ensenada 22800, Baja California, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Vazquez, R, CSIC, Inst Astrofis Andalucia, Apdo Postal 3004, E-18080 Granada, Spain. NR 32 TC 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 20 PY 1999 VL 515 IS 2 PN Part 1 BP 633 EP 639 PG 7 SC Astronomy & Astrophysics GA 200EW UT ISI:000080527500018 ER PT J AU Pols, HAP Felsenberg, D Hanley, DA Stepan, J Munoz-Torres, M Wilkin, TJ Qin-sheng, G Galich, AM Vandormael, K Yates, AJ Stych, B CA Fosamax Int Trial Study Grp TI Multinational, placebo-controlled, randomized trial of the effects of alendronate on bone density and fracture risk in postmenopausal women with low bone mass: Results of the FOSIT study SO OSTEOPOROSIS INTERNATIONAL LA English DT Article DE alendronate; bisphosphonate; bone mineral density; fractures; postmenopausal osteoporosis ID AMINOBISPHOSPHONATE ALENDRONATE; VERTEBRAL FRACTURE; ORAL ALENDRONATE; OSTEOPOROSIS; PREVENTION AB This randomized, double-masked, placebo-controlled trial evaluated the safety, tolerability and effects on bone mineral density (BMD) of alendronate in a large, multinational population of postmenopausal women with low bone mass. At 153 centers in 34 countries, 1908 otherwise healthy, postmenopausal women with lumbar spine BMD 2 standard deviations or more below the premenopausal adult mean were randomly assigned to receive oral alendronate 10 mg (n = 950) or placebo (n = 958) once daily for 1 year. All patients received 500 mg elemental calcium daily. Baseline characteristics of patients in the two treatment groups were similar. At 12 months, mean increases in BMD were significantly (p less than or equal to 0.001) greater in the alendronate than the placebo group by 4.9% (95% confidence interval 4.6% to 5.2%) at the lumbar spine, 2.4% (2.0% to 2.8%) at the femoral neck, 3.6% (3.2% to 4.1%) at the trochanter and 3.0% (2.6% to 3.4%) for the total hip. The incidence of nonvertebral fractures was significantly lower in the alendronate than the placebo group (19 vs 37 patients with fractures), representing a 47% risk reduction for nonvertebral fracture for alendronate-treated patients (95% confidence interval 10% to 70%; p = 0.021). Incidences of adverse events, including upper gastrointestinal adverse events, were similar in the two groups. Therefore, for postmenopausal women with low bone mass, alendronate is well tolerated and produces significant, progressive increases in BMD at the lumbar spine and hip in addition to significant reduction in the risk of nonvertebral fracture. C1 Erasmus Univ, Sch Med, Dept Internal Med 3, NL-3000 DR Rotterdam, Netherlands. Free Univ Berlin, D-1000 Berlin, Germany. Univ Calgary, Calgary, AB, Canada. Charles Univ, Prague, Czech Republic. Hosp Clin San Cecilio, Granada, Spain. Freedom Fields Hosp, Plymouth, Devon, England. Peking Union Med Coll Hosp, Beijing, Peoples R China. Hosp Italiano Buenos Aires, Buenos Aires, DF, Argentina. Merck Res Labs, Brussels, Belgium. Merck Res Labs, Rahway, NJ USA. Merck & Co Inc, Whitehouse Stn, NJ USA. RP Pols, HAP, Erasmus Univ, Sch Med, Dept Internal Med 3, POB 1738, NL-3000 DR Rotterdam, Netherlands. NR 20 TC 252 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL ROAD, GODALMING GU7 3DJ, SURREY, ENGLAND SN 0937-941X J9 OSTEOPOROSIS INT JI Osteoporosis Int. PY 1999 VL 9 IS 5 BP 461 EP 468 PG 8 SC Endocrinology & Metabolism GA 201GP UT ISI:000080587200012 ER PT J AU Hobart, MA Pena, JH De la Cruz, C TI Character of the O-C variation of four W UMa type stars: AW UMa, AP Leo, AG Vir and AH Vir SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID PERIOD; PHOTOMETRY AB An analysis was carried out of the secular period variation of four WU Ma type stars (AW UMa, AP Leo, AG Vir and AH Vir) using some newly determined times of minima as well as others reported in the literature. It was found that two stars show period increases, one a period decrease and the remaining shows no variation in period. C1 Univ Veracruzana, Fac Fis, Mexico City, DF, Mexico. Inst Astrofis Andalucia, Andalucia, Spain. UNAM, Inst Astron, Mexico City, DF, Mexico. RP Hobart, MA, Univ Veracruzana, Fac Fis, Mexico City, DF, Mexico. NR 17 TC 4 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 1998 VL 260 IS 3 BP 375 EP 388 PG 14 SC Astronomy & Astrophysics GA 207RA UT ISI:000080948800009 ER PT J AU Matallo, M Romero, E Pena, A Rasero, FS Dios, G TI Leaching of mecoprop and dichlorprop in calcareous soil. Effect of the exogen organic matter addition in this process SO JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES LA English DT Article DE leaching; calcareous soil; organic matter; mecoprop; dichlorprop; herbicides AB Leaching studies of mecorprop (R,S)-2-(4-chloro-2-methylphenoxy)propanoic acid, and dichlorprop, (R,S)-2-(4-chloro-2,4-dichlorophenoxy) propanoic acid, under saturated conditions were conducted in unamended and amended soil columns. The purpose of the study was to investigate the leaching of these herbicides in three type of soils and the exogen organic matter effect on this process. The leaching patterns could be related to variation in the soil texture and diffusion processes of the herbicides into micropores within the walls of conducting pore. The leaching rate in the amended soil columns decreased with the addition of organic matter. The breakthrough curves (BTC) of these herbicides in the leachates of the amended soil columns were wider and more diffused than the ETC obtained for the corresponding unamended soil. The theoretical ETC overestimated the pore volume required for the displacement of these pesticides from the soil column. This may be due to the differences in the adsorption process between the bacth and soil columns methods. C1 Inst Biol, BR-01402023 Sao Paulo, Brazil. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. RP Matallo, M, Inst Biol, Avda Conselheiro Rodrigues Alves 1252, BR-01402023 Sao Paulo, Brazil. NR 14 TC 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 USA SN 0360-1234 J9 J ENVIRON SCI HEALTH B-PESTIC JI J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes PY 1999 VL 34 IS 4 BP 617 EP 632 PG 16 SC Environmental Sciences; Public, Environmental & Occupational Health GA 210GV UT ISI:000081097500004 ER PT J AU Miranda, LF Vazquez, R Corradi, RLM Guerrero, MA Lopez, JA Torrelles, JM TI Detection of collimated bipolar outflows in the planetary nebula NGC 6572 shaping its nebular shell SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : jets and outflows; ISM : kinematics and dynamics; planetary nebulae : individual (NGC 6572) ID NARROW-BAND IMAGES; EPISODIC JET; DISTANCES; NGC-6572; ESKIMO AB Highly collimated bipolar outflows have been detected in the planetary nebula NGC 6572 via groundbased optical imagery and high-resolution long-slit spectroscopy. Kinematics and morphology together provide strong evidence of a direct interaction between the collimated outflows and the nebular elliptical shell, creating a double point-symmetric structure. As a consequence of this interaction, the elliptical shell has been broken up, and in this process parts of the shell have been accelerated, while the collimated outflow has been slowed down and/or deflected, These results strengthen the notion that collimated outflows are common in planetary nebulae and may play an important role in shaping the nebular shells. In addition, our kinematic data give a solid confirmation of previous estimates used to derive the distance to this nebula with the parallax expansion method. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Ensenada 22800, Baja California, Mexico. Inst Astrofis Canarias, E-38200 La Laguna, Tenerife, Spain. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. CSIC, IEEC, E-08034 Barcelona, Spain. RP Miranda, LF, CSIC, Inst Astrofis Andalucia, Apartado Correos 3004, E-18080 Granada, Spain. NR 30 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 1999 VL 520 IS 2 PN Part 1 BP 714 EP 718 PG 5 SC Astronomy & Astrophysics GA 218EQ UT ISI:000081540600029 ER PT J AU Torrelles, JM Gomez, JF Garay, G Rodriguez, LF Miranda, LF Curiel, S Ho, PTP TI The distribution of the warm and dense molecular gas around Cepheus A HW 2 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : pre-main-sequence; ISM : individual : Cepheus A; ISM : jets and outflows; ISM : molecules; radio lines : ISM ID STAR-FORMING REGION; CLOUDS; BIPOLAR; OUTFLOW AB We present VLA observations of the (J, K) = (1, 1), (2, 2), (3, 3) and (4, 4) inversion transitions of NH3 toward the HW 2 object in Cepheus A, with 1-arcsec angular resolution. Emission is detected in the main hyperfine line of the first three transitions. The NH3(2, 2) emission shows a non-uniform 'ring' structure, which is more extended (3 arcsec) and intense than the emission seen in the (1, 1) and (3, 3) lines. A rotational temperature of similar to 30-50 K and a lower limit to the mass of similar to 1 (X-NH3/10(-8))(-1) M. are derived for the ring structure, The spatio-kinematical distribution of the NH3 emission does not seem to be consistent with a simple circumstellar disc around the HW 2 thermal biconical radio jet. We suggest that it represents the remnant of the parental core from which both the inner 300-au (0.4 arcsec) disc, traced by the water maser spots previously found in the region, and the central object have formed. The complex velocity field of this core is probably produced from bound motions (similar to those of the inner disc) and from interaction with outflowing material. C1 CSIC, IEEC, Edifici Nexus, E-08034 Barcelona, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Univ Chile, Dept Astron, Santiago, Chile. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Torrelles, JM, CSIC, IEEC, Edifici Nexus, C Gran Capita 2-4, E-08034 Barcelona, Spain. NR 22 TC 6 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUL 21 PY 1999 VL 307 IS 1 BP 58 EP 66 PG 9 SC Astronomy & Astrophysics GA 223AU UT ISI:000081818200008 ER PT J AU Campos-Garcia, J Esteve, A Vazquez-Duhalt, R Ramos, JL Soberon-Chavez, G TI The branched-chain dodecylbenzene sulfonate degradation pathway of Pseudomonas aeruginosa W51D involves a novel route for degradation of the surfactant lateral alkyl chain SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID LINEAR ALKYLBENZENE SULFONATE; BIODEGRADATION; DETERGENTS AB Pseudomonas aeruginosa W51D is able to grow by using branched-chain dodecylbenzene sulfonates (B-DBS) or the terpenic alcohol citronellol as a sole source of carbon. A mutant derived from this strain (W51M1) is unable to degrade citronellol but still grows on B-DBS, showing that the citronellol degradation route is not the main pathway involved in the degradation of the surfactant alkyl moiety. The structures of the main B-DBS isomers and of some intermediates were identified by gas chromatography-mass spectrometric analysis, and a possible catabolic route is proposed. C1 UNAM, Inst Biotechnol, Dept Microbiol, Cuernavaca 62251, Morelos, Mexico. UNAM, Inst Biotechnol, Dept Bioingn, Cuernavaca 62251, Morelos, Mexico. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. RP Soberon-Chavez, G, UNAM, Inst Biotechnol, Dept Mol Microbiol, Apdo Postal 510-3, Cuernavaca 62251, Morelos, Mexico. NR 21 TC 11 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 USA SN 0099-2240 J9 APPL ENVIRON MICROBIOL JI Appl. Environ. Microbiol. PD AUG PY 1999 VL 65 IS 8 BP 3730 EP 3734 PG 5 SC Biotechnology & Applied Microbiology; Microbiology GA 223WR UT ISI:000081865000071 ER PT J AU Sanchez-Fernandez, C Castro-Tirado, AJ Duerbeck, HW Mantegazza, L Beckmann, V Burwitz, I Vanzi, L Bianchini, A Della Valle, M Piemonte, A Dirsch, B Hook, I Yan, L Gimenez, A TI Optical observations of the black hole candidate XTE J1550-564 during the September/October 1998 outburst SO ASTRONOMY AND ASTROPHYSICS LA English DT Letter DE X-rays : bursts; accretion, accretion disks; stars : binaries : general; stars : neutron ID RAY AB We report here optical observations during the September/October 1998 outburst of the black hole candidate XTE J1550-564. CCD photometry was obtained for the optical counterpart with the 0.9m Dutch telescope at La Silla since the onset of this event. We analysed 211 U, V and i frames, from Sep 10 to Oct 23. Stochastic flaring activity was observed on Sep 11-16, but no evidence for a superhump period, as seen in other soft X-ray transients, was found. An optical flare nearly simultaneous to an X-ray flare that occurred on Sep 21 was observed in the V-band. A reddened optical spectrum showed the typical emission lines corresponding to X-ray transients in outburst. From the interstellar absorption lines, we derive E(B-V) = 0.70 +/- 0.10 and suggest D approximate to 2.5 kpc. In such case, M-B approximate to +7 mag. for the progenitor, which is consistent with the spectral type of a low-mass similar to K0-K5 main-sequence companion. C1 INTA, LAEFF, E-28080 Madrid, Spain. Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain. Free Univ Brussels, B-1050 Brussels, Belgium. Osservatorio Astron Brera, I-23807 Merate, Italy. Univ Hamburg, Hamburger Sternwarte, D-21029 Hamburg, Germany. Max Planck Inst Extraterr Phys, D-85740 Munich, Germany. European So Observ, Santiago, Chile. Osservatorio Astron Padova, I-35122 Padua, Italy. Univ Padua, Osservatorio Astrofis Asiago, I-36012 Asiago, Italy. Univ Bonn, Sternwarte, D-53121 Bonn, Germany. European So Observ, D-85748 Munich, Germany. Observ Carnegie Inst Washington, Pasadena, CA 91101 USA. RP Castro-Tirado, AJ, INTA, LAEFF, POB 50727, E-28080 Madrid, Spain. NR 24 TC 18 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 1999 VL 348 IS 1 BP L9 EP L12 PG 4 SC Astronomy & Astrophysics GA 225ZD UT ISI:000081995100003 ER PT J AU Moreno, E Alfaro, EJ Franco, J TI The kinematics of stars emerging from expanding shells: An analysis of the Gould Belt SO ASTROPHYSICAL JOURNAL LA English DT Article DE Galaxy : kinematics and dynamics; ISM : kinematics and dynamics; solar neighborhood; stars : formation; stars : kinematics ID SCORPIO-CENTAURUS; GALACTIC DISK; EVOLUTION; CLUSTERS; ORIGIN; CLOUDS; GAS AB Using the available data for nearby stars from the Hipparcos catalog, we derive the velocity ellipsoid of dwarf O-B5.5 stars belonging to the Gould Belt (GB). The resulting vertex deviation for the whole sample of 252 stars is l(nu) similar to -64 degrees +/- 20 degrees, and this value is modified to l(nu) = 22 degrees +/- 8 degrees when the members of the Pleiades moving group are removed from the sample. This implies the existence of, at least, two different kinematic groups defining the GB system. We also model the evolution of a supershell in the solar neighborhood and obtain a fit to the shape and kinematics of the gas in the GB. Assuming that the expanding shell is also forming stars, we obtain the corresponding velocity fields for the shell and its newly formed stars. The average vertex deviation value resulting from these models for the new stars (assuming different velocity dispersion values and cutoff distances) is l(nu) similar or equal to 20 degrees and is consistent with the observed value when the Pleiades moving group members are excluded from the GB. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Moreno, E, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico. NR 60 TC 16 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 1999 VL 522 IS 1 PN Part 1 BP 276 EP 284 PG 9 SC Astronomy & Astrophysics GA 228HJ UT ISI:000082130800022 ER PT J AU Valero-Garces, BL Delgado-Huertas, A Ratto, N Navas, A TI Large C-13 enrichment in primary carbonates from Andean Altiplano lakes, northwest Argentina SO EARTH AND PLANETARY SCIENCE LETTERS LA English DT Article DE C-13; C-14; carbonates; calcite; aragonite; carbon dioxide; Altiplano ID ISOTOPE FRACTIONATION; NORTHERN CHILE; STABLE-ISOTOPE; LACUSTRINE CARBONATES; DIAGENETIC CARBONATES; SEDIMENTS; PRECIPITATION; LIMNOGEOLOGY; EVOLUTION; HOLOCENE AB We report here extreme C-13 enrichments up to +13 parts per thousand PDB in primary calcite and aragonite precipitates in saline, well oxygenated waters from high-altitude lakes in the southern Andean Altiplano, northwestern Argentina. Biological effects, as well as variations in carbon source inputs, and in the exchange rate with atmospheric CO2, are commonly considered the main controls on the carbon isotope values of authigenic lacustrine carbonate. We present sedimentological and geochemical evidence that favors physical processes - evaporation effects and CO2-degassing - as major controls on C-13 enrichment. We propose that large enrichments may result from the non-equilibrium gas-transfer isotope fractionation during CO2-degassing from thermal springs and evaporation effects in arid environments. The dilution effect by large quantities of C-14-free CO2 hinders accurate C-14 chronology of these lake records based on lacustrine organic matter and aquatic plants. Our results indicate that geothermal and volcanic CO2 sources in lake basins located in volcanic settings, and physical fractionation may have a greater significance than commonly accepted to explain lacustrine carbon isotope records. (C) 1999 Elsevier Science B.V. All rights reserved. C1 CSIC, Inst Pirenaico Ecol, E-50080 Zaragoza, Spain. CSIC, Estac Expt El Zaidin, Granada, Spain. Univ Buenos Aires, RA-1002 Buenos Aires, DF, Argentina. CSIC, Estac Expt Aula Dei, Zaragoza, Spain. RP Valero-Garces, BL, CSIC, Inst Pirenaico Ecol, Apartado 202, E-50080 Zaragoza, Spain. NR 39 TC 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0012-821X J9 EARTH PLANET SCI LETT JI Earth Planet. Sci. Lett. PD AUG 30 PY 1999 VL 171 IS 2 BP 253 EP 266 PG 14 SC Geochemistry & Geophysics GA 229FU UT ISI:000082183500005 ER PT J AU Herrera-Cervera, JA Caballero-Mellado, J Laguerre, G Tichy, HV Requena, N Amarger, N Martinez-Romero, E Olivares, J Sanjuan, J TI At least five rhizobial species nodulate Phaseolus vulgaris in a Spanish soil SO FEMS MICROBIOLOGY ECOLOGY LA English DT Article DE symbiosis; common bean; Rhizobium; Sinorhizobium ID 16S RIBOSOMAL-RNA; LEGUMINOSARUM BIOVAR PHASEOLI; GENETIC DIVERSITY; PHYLOGENETIC-RELATIONSHIPS; ETLI; POPULATIONS; ELECTROPHORESIS; SEQUENCES; GALLICUM; TROPICI AB The genetic relationships among bacteria nodulating Phaseolus vulgaris in a soil of Granada, Spain, were investigated by multilocus enzyme electrophoresis, restriction fragment length polymorphism and partial sequencing of the 16S rRNA genes and restriction fragment length polymorphisms of symbiotic genes. Multilocus enzyme electrophoresis analysis of 39 isolates determined 11 different electrophoretic types, clustered into three main genetic groups. Genetic distances between groups were above 0.8. Five different 16S rRNA gene alleles were identified in this population, corresponding to previously described rhizobial species, Rhizobium etli, Rhizobium fredii, Rhizobium gallicum, Rhizobium giardinii and Rhizobium leguminosarum. Using R. etli strain CFN42 nifH and nodB genes as hybridization probes, identical restriction fragment length polymorphism profiles were found among isolates belonging to four different 16S rRNA gene species, indicative of interspecific gene transfer. Most of the bean-nodulating strains carried three copies of nifH and strongly hybridized to the nodB gene of R. etli CFN42, suggesting that their symbiotic plasmid genes are organized similarly. Combined data from multilocus enzyme electrophoresis and 16S allele characterization indicate that more than five bacterial species compose this rhizobial population, as almost identical 16S rDNA alleles were identified in isolates belonging to deeply divergent multilocus enzyme electrophoresis lineages. (C) 1999 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. UNAM, Ctr Invest Fijac Nitrogeno, Programa Ecol Mol & Microbiana, Cuernavaca, Morelos, Mexico. INRA, Ctr Microbiol Sol & Environm, Lab Microbiol Sols, F-21034 Dijon, France. TUV Energie & Syst Techn GmbH, D-79108 Freiburg, Germany. RP Sanjuan, J, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1, E-18008 Granada, Spain. NR 27 TC 44 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-6496 J9 FEMS MICROBIOL ECOL JI FEMS Microbiol. Ecol. PD SEP PY 1999 VL 30 IS 1 BP 87 EP 97 PG 11 SC Microbiology GA 232VC UT ISI:000082389800009 ER PT J AU Mujica, MT Fracchia, S Ocampo, JA Godeas, A TI Influence of the herbicides chlorsulfuron and glyphosate on mycorrhizal soybean inter cropped with the weeds Brassica campestris or Sorghum halepensis SO SYMBIOSIS LA English DT Article DE Brassica campestris; chlorsulfuron; Glomus mosseae; Glycine max; glyphosate; Sorghum halepensis ID NON-HOST PLANTS; INFECTION; FUNGI; COMPETITION; BIOCONTROL; BIOCIDES; BENTAZON; GROWTH; ROOTS AB The effect of the herbicides chlorsulfuron and glyphosate on arbuscular mycorrhizal (AM) colonization and plant dry matter was examined in soybean cultivated either alone or as an intercrop with the weeds Brassica campestris (chlorsulfuron) or Sorghum halepensis (glyphosate). There were 48 treatments, altogether, 24 with chlorsulfuron and 24 with glyphosate. Each set of 24 was designed as 2 x 3 x 4 factorial with 1) plus or minus Glomus mosseae, 2) soybean alone, weed alone or soybean plus weed combination, 3) herbicide applied at the rates 0, 0.1, 0.5 and 1 x the field recommendation dose. The shoot dry mass of AM soybean treated with low doses of herbicides, when grown together with B. campestris or S. halepensis, but not when grown alone, was increased. This fact together with the absence of an increase in plant dry mass in intercropped non-AM soybean plants, suggest that the AM fungus mediates nutrient transfer from weeds to soybean. Neither herbicide affected AM colonization of plants except when glyphosate was applied at field recommendation dose to the weed S. halepensis grown as an intercrop. The most beneficial effect of G. mosseae on soybean was found when chlorsulfuron and glyphosate were applied at low doses, but this beneficial effect disappeared when the herbicides were applied at high doses. C1 Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. RP Ocampo, JA, CSIC, Dept Microbiol, Estac Expt Zaidin, Prof Albareda 1, E-18008 Granada, Spain. NR 15 TC 3 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT 76120, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 1999 VL 27 IS 1 BP 73 EP 81 PG 9 SC Microbiology GA 241LZ UT ISI:000082885900005 ER PT J AU Vazquez, R Lopez, JA Miranda, LF Torrelles, JM Meaburn, J TI The kinematics of NGC 4361, a Population II planetary nebula with a bipolar outflow SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE ISM : abundances; ISM : kinematics and dynamics; planetary nebulae : individual : NGC 4361; ISM : structure ID INTERMEDIATE-MASS STARS; TEMPERATURE-FLUCTUATIONS; RADIATION GASDYNAMICS; IONIZATION; EVOLUTION; EMISSION; HOT AB High-resolution, spatially-resolved profiles of H alpha, He II lambda 6560 and [O III] lambda 5007 and deep narrow-band CCD images in the Hm and [O III] lambda 5007 emission lines have been obtained of the planetary nebula (PN) NGC 4361. In addition, VLA-DnC lambda 3.6-cm continuum observations are presented, This material allows one to explore in unprecedented detail the morphology and kinematics of this PN, The morphology of this object is complex given the highly filamentary structure of the envelope, which is confirmed to possess a low mass, The halo has a high expansion velocity that yields incompatible kinematic and evolutionary ages, unless previous acceleration of the nebular expansion is considered. However, the most remarkable result from the present observations is the detection of a bipolar outflow in NGC 4361, which is unexpected in a PN with a Population II low-mass-core progenitor. It is shown that shocks resulting from the interaction of the bipolar outflow with the outer shell are able to provide an additional heating source in this nebula. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Ensenada 22800, Baja California, Mexico. CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. RP Vazquez, R, CSIC, Inst Astrofis Andalucia, Apdo Postal 3004, E-18080 Granada, Spain. NR 27 TC 8 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD OCT 1 PY 1999 VL 308 IS 4 BP 939 EP 946 PG 8 SC Astronomy & Astrophysics GA 245EC UT ISI:000083092400006 ER PT J AU Perez-Victoria, JM Tincusi, BM Jimenez, IA Bazzocchi, IL Gupta, MP Castanys, S Gamarro, F Ravelo, AG TI New natural sesquiterpenes as modulators of daunomycin resistance in a multidrug-resistant Leishmania tropica line SO JOURNAL OF MEDICINAL CHEMISTRY LA English DT Article ID MOUSE P-GLYCOPROTEIN; ANTIFEEDANT ACTIVITY; MAYTENUS-CANARIENSIS; CELASTRACEAE; CANCER; AMPLIFICATION; GENE; PHARMACOLOGY; CHEMISTRY; DONOVANI AB The effects produced by nine dihydro-beta-agarofuran sesquiterpenes isolated from Crossopetalum tonduzii (1-8) and Maytenus macrocarpa (9) (Celastraceae) on the reversion of the resistant phenotype on a multidrug-resistant Leishmania line and their binding to recombinant C-terminal nucleotide-binding domain of Leishmania P-glycoprotein-like transporter were studied. The structures of the new compounds (1-5) were elucidated by spectroscopic methods, including H-1-C-13 heteronuclear correlation (HMQC), long-range correlation spectra with inversal detection (HMBC), ROESY experiments, and chemical correlations. The absolute configuration of one of them (1) was determined by CD studies. The structure-activity relationship is discussed. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Univ La Laguna, Inst Bioorgan Antonio Gonzalez, La Laguna 38206, Tenerife, Spain. Univ Panama, Fac Farm, CIFLORPAN, Panama City, Panama. RP Ravelo, AG, CSIC, Inst Parasitol & Biomed Lopez Neyra, Ventanilla 11, Granada 18001, Spain. NR 32 TC 31 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-2623 J9 J MED CHEM JI J. Med. Chem. PD OCT 21 PY 1999 VL 42 IS 21 BP 4388 EP 4393 PG 6 SC Chemistry, Medicinal GA 247ZR UT ISI:000083251300012 ER PT J AU Neto, GBL Gerbal, D Marquez, I TI The specific entropy of elliptical galaxies: an explanation for profile-shape distance indicators? SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE galaxies : clusters : individual : Coma; galaxies : clusters : individual : Abell 85; galaxies : distances and redshifts; galaxies : elliptical and lenticular, cD; galaxies : fundamental parameters; distance scale ID BRIGHTEST CLUSTER MEMBERS; COMA CLUSTER; VIOLENT RELAXATION; FUNDAMENTAL PLANE; SURFACE BRIGHTNESS; STELLAR-SYSTEMS; STATISTICAL-MECHANICS; PHOTOMETRIC CATALOG; LUMINOSITY-PROFILE; CENTRAL REGIONS AB Dynamical systems in equilibrium have a stationary entropy; we suggest that elliptical galaxies, as stellar systems in a stage of quasi-equilibrium, may have in principle a unique specific entropy. This uniqueness, a priori unknown, should be reflected in correlations between the fundamental parameters describing the mass (light) distribution in galaxies. Following recent photometrical work on elliptical galaxies by Caon et al., Graham & Colless and Prugniel & Simien, we use the Sersic law to describe the light profile and an analytical approximation to its three-dimensional deprojection. The specific entropy is then calculated, supposing that the galaxy behaves as a spherical, isotropic, one-component system in hydrostatic equilibrium, obeying the ideal-gas equations of state. We predict a relation between the three parameters of the Sersic law linked to the specific entropy, defining a surface in the parameter space, an 'Entropic Plane', by analogy with the well-known Fundamental Plane. We have analysed elliptical galaxies in two rich clusters of galaxies (Coma and ABCG 85) and a group of galaxies (associated with NGC 4839, near Coma). We show that, for a given cluster, the galaxies follow closely a relation predicted by the constant specific entropy hypothesis with a typical dispersion (one standard deviation) of 9.5 per cent around the mean value of the specific entropy. Moreover, assuming that the specific entropy is also the same for galaxies of different clusters, we are able to derive relative distances between Coma, ABGC 85, and the group of NGC 4839, If the errors are due only to the determination of the specific entropy (about 10 per cent), then the error in the relative distance determination should be less than 20 per cent for rich clusters. We suggest that the unique specific entropy may provide a physical explanation for the distance indicators based on the Sersic profile put forward by Young & Currie and recently discussed by Binggeli & Jerjen. C1 Univ Paris 06, CNRS, Inst Astrophys, F-75014 Paris, France. Univ Sao Paulo, Inst Astron & Geofis, BR-04301904 Sao Paulo, Brazil. Univ Paris 07, Observ Paris, DAEC, CNRS UA 173, F-92195 Meudon, France. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Neto, GBL, Univ Paris 06, CNRS, Inst Astrophys, 98bis Bd Arago, F-75014 Paris, France. NR 67 TC 37 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD OCT 21 PY 1999 VL 309 IS 2 BP 481 EP 495 PG 15 SC Astronomy & Astrophysics GA 251VK UT ISI:000083466900024 ER PT J AU Garcia-Barreto, JA Aceves, H Kuhn, O Canalizo, G Carrillo, R Franco, J TI Optical spectroscopy of the central regions of bright barred spiral galaxies SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE galaxies : individual : NGC 3504, NGC 4314, NGC 4691, NGC 5135, NGC 5383, NGC 5534, NGC 5915, NGC 6951; galaxies : kinematics and dynamics galaxies : spiral ID CIRCUMNUCLEAR STAR-FORMATION; EMISSION-LINE SPECTRA; DWARF SEYFERT NUCLEI; H-ALPHA EMISSION; DISK GALAXIES; IONIZED-GAS; NGC-1097; SEARCH; NEARBY; RING AB Optical red spectra of a set of 18 bright barred spiral galaxies are presented. The study is aimed at determining the local kinematics and physical conditions of ionized gas in the compact nucleus (inside a diameter of 5") and in the circumnuclear regions (inside a diameter of 20"). Only 8 galaxies showed bright emission from their east and west side of the nucleus. The spectrum of each region was analized separately. In other 10 galaxies the line emission was so weak that we were only able to obtain an average spectrum of the central emission. No emission was detected in the remaining 8 galaxies. An estimate of the dynamical mass is presented based on the observed velocities in the circumnuclear regions. In NGC 4314 and NGC 6951, that show Ha emission distributed in circumnuclear ring structures we determine the [NII] lambda 6583/H alpha and [SII]/H alpha ratios for the eastern and western regions of the rings. The velocity difference for the two sides is used to derive the rotation of the gas around the compact nucleus. The ratio [NII] lambda 6583/H alpha, is a factor of 2 larger in the compact nucleus of NGC 6951 than in its western side. The electron gas densities have been estimated from the [SII] lines ratio. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Natl Astron Observ, Inst Astron, Ensenada 22830, Baja California, Mexico. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. RP Garcia-Barreto, JA, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico. NR 65 TC 2 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 1999 VL 35 IS 2 BP 173 EP 185 PG 13 SC Astronomy & Astrophysics GA 258EN UT ISI:000083825300006 ER PT J AU Carrillo, R Masegosa, J Dultzin-Hacyan, D Ordonez, R TI A Multifrequency Catalog of Liners SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Review DE Catalogs - galaxies; active - galaxies; fundamental parameters - galaxies; nuclei - galaxies; starburst ID ACTIVE GALACTIC NUCLEI; ULTRALUMINOUS INFRARED GALAXIES; DWARF SEYFERT NUCLEI; H-ALPHA-EMISSION; OPTICAL SPECTROSCOPY; SPIRAL GALAXIES; SOUTHERN GALAXIES; COMPLETE SAMPLE; RADIO GALAXIES; MARKARIAN GALAXIES AB We present the first Catalog of Low Ionization Emission Line Galaxies (LINERs or Liners, which is the simplest name, and which we shall adopt in what follows). The Catalog "MCL" (Multifrequency Catalog of Liners), contains 476 entries and contains both broad-band and monochromatic emission data (ranging from radio to X-ray frequencies) of colors, and other data compiled from the literature and various data bases, as indicated in the references. Most of the galaxies can be considered "pure" Liners on the basis of the Veilleux & Osterbrock (1987) classification as suggested by Ho, Filippenko, & Sargent (1997). However, a considerable number of transition (Liners-HII or Liners-Starburst) objects are also included. One of the open questions, is whether Liners should be considered as a class of galaxies (like Seyfert galaxies for instance) or rather, as an heterogeneous group Of objects. We believe the study of Liners as a group is very interesting, precisely because they very likely represent a transition between non-thermal and starburst activity, and probably also between "active" and "non- active" galaxies. This catalog may be used as a basis for statistical research. A preliminary discussion of the main statistical properties of Liners, in the range from radio to X-ray frequencies, is given here. C1 UNAM, Inst Astron, Mexico City 04510, DF, Mexico. Inst Astrofis Andalucia, Granada 18008, Spain. RP Carrillo, R, UNAM, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico. NR 154 TC 13 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 1999 VL 35 IS 2 BP 187 EP 227 PG 41 SC Astronomy & Astrophysics GA 258EN UT ISI:000083825300007 ER PT J AU Venedikian, N Chiocchio, V Martinez, A Menendez, A Ocampo, JA Godeas, A TI Influence of the fungicides carbendazim and chlorothalonil on spore germination, arbuscular mycorrhizal colonization and growth of soybean plants SO AGROCHIMICA LA English DT Article ID INFECTION; ROOTS AB The application of the fungicides carbendazim and chlorothalonil decreased the percentage of colonization of soybean by the arbuscular mycorrhizal fungus Glomus mosseae. However, nonsignificant effect was observed on the colonization of soybean by the application of the fungicide chlorothalonil. Concentrations of 0.1 x 10(-3) mu l ml(-1) of carbendazim and 0.01 x 10(-3) mu l ml(-1) of chlorothalonil inhibited germination and hyphal length of G. mosseae spores. Ungerminated spores, treated with the fungicides, were able to germinate whell were transferred to freshly-prepared water-agar plates indicating a fungistatic rather than a fungicidal effect. C1 Univ Buenos Aires, Dept Ciencias Biol, Buenos Aires, DF, Argentina. CSIC, Dept Microbiol, Estac Expt Zaidin, Granada, Spain. RP Venedikian, N, Univ Buenos Aires, Dept Ciencias Biol, Buenos Aires, DF, Argentina. NR 11 TC 4 PU IST CHIMICA AGRARIA PI PISA 56100 PA UNIV PISA VIA S MICHELE DEGLI SCALZI, 2 PISA 56100, ITALY SN 0002-1857 J9 AGROCHIMICA JI Agrochimica PD MAY-AUG PY 1999 VL 43 IS 3-4 BP 105 EP 109 PG 5 SC Chemistry, Applied; Soil Science GA 260RW UT ISI:000083964500001 ER PT J AU Marquez, I Durret, F Delgado, RMG Marrero, I Masegosa, J Maza, J Moles, M Perez, E Roth, M TI Near-infrared photometry of isolated spirals with and without an AGN I. The data SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE galaxies : active; galaxies : fundamental parameters; galaxies : photometry; infrared : galaxies ID CCD SURFACE PHOTOMETRY; ACTIVE GALACTIC NUCLEI; SEYFERT-GALAXIES; IMAGING SURVEY; REGIONS; REDUCTION; STELLAR; BULGE; BARS AB We present infrared imaging data in the J and K' bands obtained for 18 active spiral galaxies, together with 11 non active galaxies taken as a control sample. All of them were chosen to satisfy well defined isolation criteria so that the observed properties are not related to gravitational interaction. For each object we give: the image in the K' band; the sharp-divided image (obtained by dividing the observed image by a filtered one); the difference image (obtained by subtracting a model to the observed one), the color J - K' image, the ellipticity and position angle profiles: the surface brightness profiles in J and K', their fits by bulge+disk models and the color gradient. We have found that four (one) active (control) galaxies previously classified as non-barred turn out to have bars when observed in the near-infrared. One of these four galaxies (UGC 1395) also harbours a secondary bar. For 15 (9 active, 6 control) out of 24 (14 active, 10 control) of the optically classified barred galaxies (SB or SX) we find that a secondary bar (or a disk; a lense or an elongated ring) is present. The work presented here is part of a large program (DEGAS) aimed at finding out whether there are differences between active and non active galaxies in the properties of their central regions that could be connected with the onset of nuclear activity. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Paris 07, DAEC, Observ Paris, CNRS,UA 173, F-92195 Meudon, France. Univ Chile, Dept Astron, Santiago, Chile. CSIC, Inst Mat & Fis Fundamental, Madrid, Spain. Observ Astron Nac, Madrid, Spain. Observ Carnegie Inst Washington, Pasadena, CA 91101 USA. RP Marquez, I, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. NR 37 TC 27 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD NOV PY 1999 VL 140 IS 1 BP 1 EP 14 PG 14 SC Astronomy & Astrophysics GA 260XV UT ISI:000083979500001 ER PT J AU Curiel, S Torrelles, JM Rodriguez, LF Gomez, JF Anglada, G TI A study of the kinematics and temperature of the high-density molecular gas surrounding L1448C SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (L1448); ISM : jets and outflows; ISM : molecules; stars : formation; stars : pre-main-sequence ID INTERSTELLAR AMMONIA; BIPOLAR OUTFLOW; EXCITING SOURCE; L-1448 OUTFLOW; EXTINCTION LAW; BOW SHOCKS; EMISSION; JET; THERMOMETER; BULLETS AB We have performed VLA ammonia (1, 1) and (2, 2) observations of the molecular core associated with the very young stellar object L1448C, the powering source of the highly collimated bipolar outflow L1448. The line broadening observed in the molecular core appears to be a consequence of the interaction between the highly collimated wind from L1448C and the ambient molecular gas. The ammonia line emission shows a velocity gradient in a direction perpendicular to the outflow axis, which is consistent with rotation in a circumstellar structure. In addition, there is also evidence of a velocity gradient along the outflow axis, suggesting that the ammonia line emission could be tracing a self-gravitating, thick, disklike structure around L1448C, which appears to be rotating and contracting. We also detect ammonia emission associated with IRS 3, the infrared source about 75" northwest of L1448C. This emission presents a wedgelike morphology pointing away from L1448C. We propose that this ammonia structure traces the region where the leading head of the L1448C near-infrared H-2 jet is carving a cavity in the northern molecular core, or alternatively, where the near-infrared H-2 jet is being bent to the west by the northern high-density core. In addition, an anticorrelation between the ammonia and H-2 line emissions is found. The near-infrared H-2 line emission is clearly seen in the relatively low density gap between the northern (IRS 3) and southern (L1448C) molecular cores, while the high-density molecular gas surrounding L1448C completely obscures this young stellar object and its counterjet at optical and near-infrared wavelengths. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. RP Curiel, S, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico. NR 31 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1999 VL 527 IS 1 PN Part 1 BP 310 EP 320 PG 11 SC Astronomy & Astrophysics GA 265EA UT ISI:000084227300028 ER PT J AU Godeas, A Fracchia, S Mujica, MT Ocampo, JA TI Influence of soil impoverishment on the interaction between Glomus mosseae and saprobe fungi SO MYCORRHIZA LA English DT Article DE arbuscular mycorrhizas; Glomus mosseae; saprobe fungi; Glycine max ID ARBUSCULAR MYCORRHIZAS; INOCULATION; INFECTION; STRAINS; GROWTH; ROOTS AB The effect of the saprobe fungi Wardomyces inflatus (Marchal) Hennebert, Paecilomyces farinosus (Holm & Gray) A. H. S. Brown & G. Sm., Gliocladium roseum Bain., Trichoderma pseudokoningii Rifai and T. harzianum Rifai, isolated from sporocarps of Glomus mosseae, on arbuscular mycorrhizal (AM) colonisation and plant dry matter of soybean was studied in 2/3 and 1/5 diluted soils in a greenhouse trial. Soil dilution to 1/5 had no effect on shoot dry matter of soybean but decreased AM colonisation and root dry weight of plants. CFU of saprobe fungi, except T. harzianum, were higher in 1/5 than in 2/3 diluted soils. W. inflatus and Gliocladium roseum decreased the shoot dry weight of soybean plant when inoculated together with Glomus mosseae. The saprobe fungi P. farinosus and T. pseudokoningii increased the shoot dry weights of plants grown in 1/5 diluted soil. The shoot dry weight and AM colonisation in 1/5 diluted soil were also increased when T. harzianum was inoculated together with Glomus mosseae. Thus, saprobe fungi increased AM colonisation of soybean plants by indigenous endophytes. The AM colonisation of plants at both soil dilutions was increased by Glomus mosseae. The highest level of AM colonisation was observed when P. farinosus and T. pseudokoningii were inoculated together Glomus mosseae. The dilution of soils influenced the interaction between inoculated microorganisms and their effect on plant growth. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. RP Ocampo, JA, CSIC, Estac Expt Zaidin, Prof Albareda 1, E-18008 Granada, Spain. NR 28 TC 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0940-6360 J9 MYCORRHIZA JI Mycorrhiza PD DEC PY 1999 VL 9 IS 4 BP 185 EP 189 PG 5 SC Mycology GA 273RM UT ISI:000084721000001 ER PT J AU Rodriguez, LF Anglada, G Curiel, S TI The nature of the radio continuum sources embedded in the HH 7-11 region and its surroundings SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE ISM : individual (HH 7-11); ISM : jets and outflows; radio continuum : stars; stars : pre-main-sequence ID HERBIG-HARO OBJECTS; STAR-FORMING REGIONS; SPECTRAL INDEXES; VLA OBSERVATIONS; NGC-1333 IRAS-4; MOLECULAR JET; EMISSION; OUTFLOW; POPULATION; PROTOSTAR AB Using the Very Large Array, we have carried out sensitive radio continuum observations at 6 and 3.6 cm of the HH 7-11 region, detecting a total of 44 radio sources in the 8' x 8' region centered at this HH complex. The majority of these sources, at least 26 of them, are believed to be associated with young objects in the cloud. Among these sources are found candidates to power all the CO outflows observed in the region. For the first time, we detect at centimeter wavelengths counterparts to the young objects IRAS 2A, IRAS 2B, ASR 51, ASR 7, MMS 2, and IRAS 4C, and to the foreground G2 IV star BD +30 degrees 547. There is a strong correlation between the far-infrared and millimeter sources reported previously and the centimeter sources discussed here. Most likely, this correlation results from the fact that young embedded stars systematically have ionized outflows. Under these assumptions, the far-infrared and millimeter emission will originate from dust heated in the surroundings of the star, while the centimeter emission will come from the ionized flow. However, in two of the sources detected, the centimeter emission appears to have a significant contribution from heated dust. Two of the detected sources are time-variable, circularly polarized sources, and one of them is associated with a previously known T Tauri star. The results of our study suggest that sensitive radio continuum studies of other active star-forming regions could reveal a similar diversity of centimeter wavelength sources. C1 UNAM, Unidad Morelia, Morelia 58090, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Rodriguez, LF, UNAM, Unidad Morelia, JJ Tablada 1006, Morelia 58090, Michoacan, Mexico. NR 50 TC 41 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0067-0049 J9 ASTROPHYS J SUPPL SER JI Astrophys. J. Suppl. Ser. PD DEC PY 1999 VL 125 IS 2 BP 427 EP 438 PG 12 SC Astronomy & Astrophysics GA 277PA UT ISI:000084940900007 ER PT J AU Pagano, EA Chueca, A Hermoso, R Lazaro, JJ Lopez-Gorge, J TI Ontogenic changes of thioredoxins f and m, and of their targets fructose-1,6-bisphosphatase and NAD(P)-malate dehydrogenase, of pea plants grown under light stress conditions SO NEW PHYTOLOGIST LA English DT Article DE fructose-1,6-bisphosphatase; light-stress; NAD(P)-malate dehydrogenase; ontogeny; thioredoxins ID PROTEIN; CHLOROPLAST; METABOLISM; PHOTOSYNTHESIS; BIOSYNTHESIS; PURIFICATION; EXPRESSION; REDUCTASE AB The transcript (mRNA) level and the protein content (as determined by enzyme-linked immunosorbent assay) of thioredoxins (Trx) f and m, and of their targets, chloroplast fructose-1,6-bisphosphatase (FBPase) and NAD(P)-malate dehydrogenase (NADP-MDH), increase over the ontogeny of pea plants grown under normal conditions, showing their highest values before flowering (40 d growth). The dearest results appear in apical, but also in middle leaves. Enzyme activites of FBPase and NADP-MDH were lowest just before flowering. In the case of FBPase this was probably a mechanism to facilitate triose-phosphate export to the cytosol for sucrose synthesis. The likely function of NADP-MDH is to supply the cytosol, via the malate translocator, with the NAD(P)H necessary for UTP regeneration in the sucrose biosynthetic pathway. Both the F-v/F(m)ratio and the net photosynthetic rate (IRGA) decreased at saturating irradiance (16 h photoperiod) and under sub-saturating continuous light. However, the F-v/F-m quotient recovered to normal values after several days adaptation to high light. A similar recovery was also observed in net photosynthesis, although normal levels were never obtained. Under light-stress conditions the concentration of Trxs f and m, and of the targets FBPase and NADP-MDH, were somewhat lower than those of unstressed plants. Even though the levels of the corresponding transcripts (mRNAs) are similar in upper leaves from control and light-stressed plants, those of the middle and basal leaves from plants grown under high light were substantially higher than those of the control plants. In addition to the well-documented transcriptional regulation of nuclear-coded chloroplast proteins, these results seem to indicate the existence of an additional post-transcriptional control. C1 Estac Expt Zaidin, Dept Plant Biochem, Granada 18008, Spain. Univ Buenos Aires, Fac Agron, RA-1053 Buenos Aires, DF, Argentina. RP Lopez-Gorge, J, Estac Expt Zaidin, Dept Plant Biochem, Profesor Albareda 1, Granada 18008, Spain. NR 28 TC 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 USA SN 0028-646X J9 NEW PHYTOL JI New Phytol. PD JAN PY 2000 VL 145 IS 1 BP 21 EP 28 PG 8 SC Plant Sciences GA 280RW UT ISI:000085116800004 ER PT J AU Miranda, LF Fernandez, M Alcala, JM Guerrero, MA Anglada, G Gomez, Y Torrelles, JM Aaquist, OB TI High-resolution spectroscopy and broad-band imaging of the young planetary nebula K 3-35 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : mass-loss; ISM : jets and outflows; planetary nebulae : individual : K3-35 ID RADIO MORPHOLOGY; BIPOLAR; K-3-35; FLIERS AB We present high-resolution echelle and long-slit spectra and broad-band (R, I) images of the very young planetary nebula K3-35. Several emission lines are identified, including the He II 4686 line and strong [N II]6548, 6583 and [O III]4959, 5007 emissions [I([N II])/I(H alpha) similar or equal to 5.5, I([O III])/I(H beta) similar or equal to 30]. A systemic velocity V-LSR = 10 +/- 2 km s(-1) for K3-35 is obtained from the optical emission lines, Two different kinematic components are identified in the nebula. One of them is probably related to the elliptical envelope previously observed. The second component exhibits systematic changes of the radial velocity with position, and a relatively small velocity width. This component may be attributed to the precessing jet-like outflows previously identified. The R and I images and the deduced R - I colour map strongly support the existence of a dense, partially neutral disc-like region in the equatorial plane of the nebula, which probably represents an equatorial density enhancement in a previously ejected slow wind. Diagnostic diagrams for Line intensity ratios in K 3-35 and collimated components of other planetary nebulae suggest that the emission spectrum of this kind of structure is a combination of radiative and shock excitation, in agreement with recent models of shocks in a strongly photoionized medium. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Max Planck Inst Extraterr Phys, D-85740 Garching, Germany. Osservatorio Astron Capodimonte, I-80131 Naples, Italy. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. UNAM, Inst Astron, Unidad Morelia, Morelia 58090, Michoacan, Mexico. CSIC, IEEC, E-08034 Barcelona, Spain. Grant MacEwan Community Coll, Edmonton, AB T5J 4S2, Canada. RP Miranda, LF, CSIC, Inst Astrofis Andalucia, Ap Correos 3004,C Sancho Panza S-N, E-18080 Granada, Spain. NR 24 TC 9 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD FEB 1 PY 2000 VL 311 IS 4 BP 748 EP 754 PG 7 SC Astronomy & Astrophysics GA 285AX UT ISI:000085366900011 ER PT J AU Marquez, I Neto, GBL Capelato, H Durret, F Gerbal, D TI Gravo-thermal properties and formation of elliptical galaxies SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gravitation; methods : N-body simulations; galaxies : clusters : individual : Abell 496; galaxies : clusters : individual : Abell 85; galaxies : clusters : individual : Coma; galaxies : formation ID COMA CLUSTER; PHOTOMETRIC CATALOG; DISTANCE INDICATOR; FUNDAMENTAL PLANE; RELAXATION; PROFILES; SHAPE AB We have analyzed a sample of galaxies belonging to three clusters: Coma, Abell 85, and Abell 496 (real galaxies) and a sample of simulated elliptical galaxies formed in a hierarchical merging scheme (virtual galaxies). We use the Sersic law to describe their light profile. The specific entropy (Boltzmann-Gibbs definition) is then calculated supposing that the galaxies behave as spherical, isotropic, one-component systems. We find that, to a good approximation (similar to 10%), both real and virtual galaxies have an almost unique specific entropy. Within this approximation the galaxies are distributed in a thin plane in the space defined by the three Sersic law parameters, which we call the Entropic Plane. A further analysis shows that both real and virtual galaxies are in fact located on a thin line, therefore indicating the existence of another - and yet unknown - physical property, besides the uniqueness of the specific entropy. A more careful examination of the virtual galaxies sample indicates a very small increase of their specific entropy with merging generation. In a hierarchical scenario, this implies a correlation between the specific entropy and the total mass, which is indeed seen in our data. The scatter and tilt of the Entropic Line, defined by Lima Neto et al. (1999a), are reduced when this correlation is taken into account. Although one cannot distinguish between various generations for real galaxies, the distribution of their specific entropy is similar to that in the virtual sample, suggesting that hierarchical merging processes could be an important mechanism in the building of elliptical galaxies. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. USP, Inst Astron & Geofis, BR-09500900 Sao Paulo, Brazil. CNRS, Inst Astrophys Paris, F-75014 Paris, France. Inst Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos, Brazil. Univ Paris 07, CNRS, UA 173, Observ Paris,DAEC, F-92195 Meudon, France. RP Marquez, I, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. NR 32 TC 16 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 2000 VL 353 IS 3 BP 873 EP 886 PG 14 SC Astronomy & Astrophysics GA 285HA UT ISI:000085382600012 ER PT J AU Perez, E Marquez, I Marrero, I Durret, F Delgado, RMG Masegosa, J Maza, J Moles, M TI Circumnuclear structure and kinematics in the active galaxy NGC 6951 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : active; galaxies : individual : NGC 6951; galaxies : kinematics and dynamics; galaxies : nuclei; galaxies : spiral; galaxies : structure ID GRAND-DESIGN GALAXIES; DWARF SEYFERT NUCLEI; H-II REGIONS; SPIRAL GALAXIES; STAR-FORMATION; HYDRODYNAMICAL SIMULATIONS; DYNAMICAL INTERPRETATION; INTERSTELLAR-MEDIUM; BARRED GALAXIES; MOLECULAR GAS AB A study is presented of the central structure and kinematics of the galaxy NGC 6951, by means of broad band B'IJK images and high resolution high dispersion longslit spectroscopy, together with archival HST WFPC2 V and NICMOS2 J and H images. We find that there is little ongoing star formation inside the bar dominated region of the galaxy, except for the circumnuclear ring at 5 arcsec radius. There is some evidence that this star formation occurs in two modes, in bursts and continuously, along the ring and inwards, towards the nucleus. The equivalent width of the Call triplet absorption lines show that, in the metal rich central region, the continuum is dominated by a population of red supergiants, while red giants dominate outside. The gaseous kinematics along three slit position angles, and the comparison with the stellar kinematics, suggest the existence of a hierarchy of disks within disks, whose dynamics are decoupled at the two inner Linblad resonances (ILR), that we find to be located at 180 pc and at 1100 pc. This is supported by the structure seen in the high resolution HST images. The nucleus is spatially resolved in the emission line ratio [NII]/H alpha, and in the FWHM of the emission lines, within a radius of 1.5", just inside the innermost ILR. Outside the iILR, the stellar CaT velocity profile is resolved into two different components, associated with the bar and the disk. Several results indicate that this is a dynamically old system: the little ongoing star formation inside the bar dominated part of the galaxy, the very large relative amount of molecular to total mass within the inner 6 arcsec radius, similar to 25%, and the geometry of the circumnuclear ring that leads the stellar bar at a position angle greater than 90 degrees. It is thus possible that a nuclear bar has existed in NGC 6951 that drove the gas towards the nucleus, as in the bars within bars scenario, but that this bar has already dissolved by the gas accumulated within the circumnuclear region. We discuss the possibility that the kinematical component inside the ilLR could be due to a nuclear outflow produced by the combined effects of SN and SN remnants, or to a nuclear disk, as in the disk within disk scenario that we propose fur the fueling of the AGN in NGC 6951. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Paris 06, CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Chile, Dept Astron, Santiago, Chile. CSIC, Inst Matemat & Fis Fundamental, Madrid, Spain. Observ Astron Nacl, Madrid, Spain. RP Perez, E, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. NR 69 TC 29 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 2000 VL 353 IS 3 BP 893 EP 909 PG 17 SC Astronomy & Astrophysics GA 285HA UT ISI:000085382600014 ER PT J AU Robello, C Dallagiovanna, B Castanys, S Gamarro, F Ehrlich, R TI Trypanosoma cruzi: Molecular cloning of a gene coding for a putative vacuolar protein SO EXPERIMENTAL PARASITOLOGY LA English DT Article DE Trypanosoma cruzi; parasite protozoo; putative vacuolar protein ID TRANSPORT; ENDOSPERM AB We describe the characterization of Tc38, a Trypanosoma cruzi gene coding for a 337-amino-acid protein with a predicted molecular mass of 38 kDa, Tc38 presents similarities to the plant storage vacuolar protein gamma-3-hordein involved in the transport and targeting of prolamins to the vacuole of developing barley endosperm. Western blot analysis using a polyclonal antiserum against recombinant Tc38 revealed that the protein is differentially expressed in the different life stages of the parasite, showing a higher expression in the epimastigote and tripomastigote stages. Immunofluorescence studies suggest that the protein is located in putative vacuolar structures in epimastigotes. The functionality of this protein in I cruzi remains to be elucidated. (C) 2000 Academic Press. C1 Univ Republ, Fac Ciencias, Dept Bioquim, Secc Bioquim, Montevideo, Uruguay. CSIC, Inst Parasitol & Biomed Lopez Neyra, Dept Bioquim & Farmacol Mol, Granada, Spain. Univ Republ, Fac Med, Dept Bioquim, Montevideo, Uruguay. RP Ehrlich, R, Univ Republ, Fac Ciencias, Dept Bioquim, Secc Bioquim, Igua 4225, Montevideo, Uruguay. NR 11 TC 0 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0014-4894 J9 EXP PARASITOL JI Exp. Parasitol. PD FEB PY 2000 VL 94 IS 2 BP 129 EP 131 PG 3 SC Parasitology GA 289GR UT ISI:000085612600009 ER PT J AU Paparo, M Rodriguez, E McNamara, BJ Kollath, Z Rolland, A Gonzalez-Bedolla, SF Jiang, SY Li, ZP TI A comprehensive study of the delta Scuti star, 57 Tauri (= HR 1351) in the Hyades cluster SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE stars : individual : 57 Tau = HR 1351; stars : oscillations; stars : variables : delta Sct; stars : binaries : spectroscopic ID PHOTOELECTRIC PHOTOMETRY; NONRADIAL PULSATION; GAMMA-DORADUS; BINARY-SYSTEM; FREQUENCIES; VARIABLES; CAMPAIGN; CATALOG AB A comprehensive frequency analysis of 57 Tau, supposed only a static pulsational arrangement, is presented based on 54 nights of photometric data collected between 1981 and 1995 (altogether 232 hours). The presence of individual frequencies is confirmed by intercomparing four subsets of this data set, however, the uncertainties in data coming from the sparse nights and low signal weaken the conclusion on some results. The entire data base is then used to resolve closely spaced peaks. Twelve frequencies are indentified using this process. Further multisite observations are recommended to confirm the present frequency solution. Two periods, with a high probability of being real, are found in the low frequency domain. They are suggested to arise from binarity or g modes, as in gamma Dor stars. Single unusual cycles, possessing large amplitude, or displaying asymmetry, have been localized. A coherent frequency at 29.83 c/d with variable amplitude was found. The nonstandard behaviour of the light variation indicates that nonlinear and/or nonstationary processes could be very important in the investigation of delta Scuti observations. C1 Konkoly Observ Budapest, H-1525 Budapest 12, Hungary. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. New Mexico State Univ, Las Cruces, NM 88003 USA. UNAM, Observ Astron Nacl, Ensenada 22800, Baja California, Mexico. Chinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R China. RP Paparo, M, Konkoly Observ Budapest, POB 67, H-1525 Budapest 12, Hungary. NR 31 TC 5 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD FEB PY 2000 VL 142 IS 1 BP 1 EP 11 PG 11 SC Astronomy & Astrophysics GA 293EQ UT ISI:000085838900001 ER PT J AU Thomas, MC Olivares, M Escalante, M Maranon, C Montilla, M Nicholls, S Lopez, MC Puerta, C TI Plasticity of the histone H2A genes in a Brazilian and six Colombian strains of Trypanosoma cruzi SO ACTA TROPICA LA English DT Article DE Trypanosoma cruzi; H2A gene units; polymorphism; plasticity; SINE; genome ID DNA; EXPRESSION; CHROMOSOMES; KARYOTYPE; EVOLUTION; SEQUENCE; REPEATS; BRUCEI AB The analysis of three recombinant clones containing the histone H2A locus isolated from a genomic library of Trypanosoma cruzi DNA shows that the H2A gene loci are formed by 1.2 and 0.76 kb long intercalated units organized in a head-to-tail tandem array. The difference in length between the two gene units is due to the presence of a short interspersed nucleotide element (SINE)-like DNA sequence inserted at the 3' end of some of these units. Southern, northern and chromosomal blot analysis of a Brazilian Y strain and six Colombian strains demonstrated the existence of polymorphisms regarding the relative copy number of the H2A gene units, the relative abundance of the H2A transcripts and their chromosomal location. These results show the existence of a dynamic organization in the H2A loci among T, cruzi strains in which a SINE-like sequence may be involved and support the fact that T. cruzi has a high degree of plasticity in its genome. (C) 2000 Elsevier Science B.V. All rights reserved. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Univ Javeriana, Dept Microbiol & Parasitol, Bogota, Colombia. Inst Nacl Salud, Parasitol Lab, Bogota, Colombia. RP Lopez, MC, CSIC, Inst Parasitol & Biomed Lopez Neyra, Calle Ventanilla 11, Granada 18001, Spain. NR 31 TC 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0001-706X J9 ACTA TROP JI Acta Trop. PD MAR 25 PY 2000 VL 75 IS 2 BP 203 EP 210 PG 8 SC Parasitology; Tropical Medicine GA 294JE UT ISI:000085907500007 ER PT J AU Masetti, N Palazzi, E Pian, E Hunt, LK Mendez, M Frontera, F Amati, L Vreeswijk, PM Rol, E Galama, TJ van Paradijs, J Antonelli, LA Nicastro, L Feroci, M Marconi, G Piro, L Costa, E Kouveliotou, C Castro-Tirado, AJ Falomo, R Augusteijn, T Bohnhardt, H Lidman, C Vanzi, L Merrill, KM Kaminsky, CD van der Klis, M Heemskerk, MHM van der Hooft, F Kuulkers, E Pedersen, H Benetti, S TI Near-infrared detection and optical follow-up of the GRB990705 afterglow SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; radiation mechanisms : non-thermal; galaxies : general ID GAMMA-RAY BURST; STANDARD STARS; GALAXY; EXTINCTION; SYSTEM AB Optical and near-infrared observations of the GRB990705 error box were carried out with ESO telescopes at La Silla and Paranal in Chile and with the NOAO SPIREX 0.6-meter telescope in Antarctica. We detected the counterpart of this GRB in the near-infrared H band and optical V band. The power-law decline of the near-infrared lightcurve is rather steep with a decay index alpha similar or equal to 1.7 in the first hours, and a possible steepening after one day. Broadband spectral analysis of the optical/near-infrared afterglow suggests that this GRB took place in a high density environment. A deep optical image obtained at Antu (VLT-UT1) about 5 days after the GRB trigger shows at the position of the transient an extended object which might be the host galaxy of GRB990705. C1 CNR, Ist Tecnol & Studio Radiazioni Extraterrestri, I-40129 Bologna, Italy. CNR, Ctr Astron Infrarossa & Studio Mezzo Interstellar, I-50125 Florence, Italy. Univ Amsterdam, Astron Inst, NL-1098 SJ Amsterdam, Netherlands. Natl Univ La Plata, Fac Ciencias Astron & Geofis, RA-1900 La Plata, Argentina. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Univ Alabama, Dept Phys, Huntsville, AL 35899 USA. Osserv Astron Roma, I-00040 Monte Porzio Catone, Italy. CNR, Ist Fis Cosm Applicazioni Informat, I-90146 Palermo, Italy. CNR, Ist Fis Cosm Applicaz Informat, I-00131 Rome, Italy. Univ Space Res Assoc, Huntsville, AL 35800 USA. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 28080, Spain. Osserv Astron Padova, I-35122 Padua, Italy. European So Observ, Santiago, Chile. Natl Opt Astron Observ, Tucson, AZ 85726 USA. Univ Chicago, Yerkes Observ, Ctr Astrophys Res Astron, Williams Bay, WI 53191 USA. Space Res Org Netherlands, NL-3584 CA Utrecht, Netherlands. Univ Utrecht, Astron Inst, NL-3507 TA Utrecht, Netherlands. Copenhagen Univ Observ, DK-2100 Copenhagen, Denmark. Ctr Galileo Galilei, Telescopio Nazl Galileo, Santa Cruz de la Palma 38700, Canary Isl, Spain. RP Masetti, N, CNR, Ist Tecnol & Studio Radiazioni Extraterrestri, Via Gobetti 101, I-40129 Bologna, Italy. EM masetti@tesre.bo.cnr.it NR 52 TC 31 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 2000 VL 354 IS 2 BP 473 EP 479 PG 7 SC Astronomy & Astrophysics GA 294QH UT ISI:000085921500012 ER PT J AU Guerrero, MA Miranda, LF Manchado, A Vazquez, R TI The triple-shell structure and collimated outflows of the planetary nebula NGC 6891 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : AGB and post-AGB; ISM : jets and outflows; ISM : kinematics and dynamics; planetary nebulae : individual : NGC 6891 ID STELLAR WIND PALEONTOLOGY; HALOS; JETS; SPECTROSCOPY; EVOLUTION; BIPOLAR; ANSAE; STARS; MASS AB Narrow-band H alpha and [N-II] images and high-dispersion spatially resolved echelle spectroscopy of the planetary nebula NGC 6891 are presented. These observations show a great wealth of structures. The bright central nebula is surrounded by an attached shell and a detached outer halo. Both the inner and intermediate shells can be described as ellipsoids with similar major to minor axial ratios, but different spatial orientations. The kinematical ages of the intermediate shell and halo are 4800 and 28 000 yr, respectively. The intershell time lapse is in good agreement with the evolutionary interpulse time lapse. A highly collimated outflow is observed to protrude from the tips of the major axis of the inner nebula and impact on the outer edge of the intermediate shell. Kinematics and excitation of this outflow provide conclusive evidence that it is deflected during the interaction with the outer edge of the intermediate shell. At the same time, both the kinematics and the morphology of the intermediate shell appear to be affected by this interaction. C1 Inst Astrofis Canarias, Tenerife 38200, Spain. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Ensenada 22800, Baja California, Mexico. RP Guerrero, MA, Inst Astrofis Canarias, Via Lactea S-N, Tenerife 38200, Spain. NR 33 TC 11 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAR 21 PY 2000 VL 313 IS 1 BP 1 EP 7 PG 7 SC Astronomy & Astrophysics GA 300UV UT ISI:000086272200005 ER PT J AU Dickman, R Munoz, MA Vespignani, A Zapperi, S TI Paths to self-organized criticality SO BRAZILIAN JOURNAL OF PHYSICS LA English DT Review ID SUPERCONDUCTING VORTEX AVALANCHES; KINETIC CRITICAL PHENOMENON; ANNIHILATING RANDOM-WALKS; UPPER CRITICAL DIMENSION; ABELIAN SANDPILE MODEL; CHARGE-DENSITY WAVES; FOREST-FIRE MODEL; ABSORBING STATES; ACOUSTIC-EMISSION; CRITICAL-BEHAVIOR AB We present a pedagogical introduction to self-organized criticality (SOC), unraveling its connections with nonequilibrium phase transitions. There are several paths from a conventional critical point to SOC. They begin with an absorbing-state phase transition (directed percolation is a familiar example), and impose supervision or driving on the system; two commonly used methods are extremal dynamics, and driving at a rate approaching zero. We illustrate this in sandpiles, where SOC is a consequence of slow driving in a system exhibiting an absorbing-state phase transition with a conserved density. Other paths to SOC, in driven interfaces, the Bak-Sneppen model, and self-organized directed percolation, are also examined. We review the status of experimental realizations of SOC in Light of these observations. C1 Univ Fed Minas Gerais, ICEx, Dept Fis, BR-30161970 Belo Horizonte, MG, Brazil. Inst Carlos I Theoret & Computat Phys, Granada 18071, Spain. Dept Electromagnetismo & Fis Mat, Granada 18071, Spain. Int Ctr Theoret Phys, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy. Ecole Phys & Chim Ind, PMMH, F-75231 Paris 05, France. RP Dickman, R, Univ Fed Minas Gerais, ICEx, Dept Fis, Caixa Postal 702, BR-30161970 Belo Horizonte, MG, Brazil. NR 128 TC 90 PU SOCIEDADE BRASILEIRA FISICA PI SAO PAULO PA CAIXA POSTAL 66328, 05315-970 SAO PAULO, BRAZIL SN 0103-9733 J9 BRAZ J PHYS JI Braz. J. Phys. PD MAR PY 2000 VL 30 IS 1 BP 27 EP 41 PG 15 SC Physics, Multidisciplinary GA 301TB UT ISI:000086325400004 ER PT J AU Robello, C Gamarro, F Castanys, S Alvarez-Valin, F TI Evolutionary relationships in Trypanosoma cruzi: molecular phylogenetics supports the existence of a new major lineage of strains SO GENE LA English DT Article DE phylogeny; pteridine reductase; strains; Trypanosoma cruzi ID MULTILOCUS ENZYME ELECTROPHORESIS; MINI-EXON GENE; CHAGAS-DISEASE; DNA; LEISHMANIA; RESISTANCE; SEQUENCES; PARASITE; AGENT; RNA AB For the purpose of investigating the evolutionary relationships among strains of the human parasite Trypanosoma cruzi, we have determined the nucleotide sequence: in 16 T. cruzi stocks, of a DNA fragment having approximately 1030 nucleotides in length. Phylogenetic analyses show the presence of at least three major groups of T, cruzi strains, a result that contradicts previous phylogenetic inferences based on polymorphism data. We also performed an analysis of the relative extent of nucleotide divergence among T. cruzi strains compared to the divergence between Leishmania species, using the gene encoding pteridine reductase. The results presented in this work show that the divergence among the most distant T. cruzi strains is at least as high as the divergence between two different species complexes of Leishmania, those containing L. major and L.. mexicana. (C) 2000 Published by Elsevier Science B.V. All rights reserved. C1 Fac Ciencias, Secc Biomatemat, Montevideo, Uruguay. Fac Med, Dept Bioquim, Montevideo, Uruguay. Consejo Super Invest Cient, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. RP Alvarez-Valin, F, Fac Ciencias, Secc Biomatemat, Montevideo, Uruguay. NR 37 TC 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD APR 4 PY 2000 VL 246 IS 1-2 BP 331 EP 338 PG 8 SC Genetics & Heredity GA 304NP UT ISI:000086490600034 ER PT J AU Calvo, O Cartwright, JHE Gonzalez, DL Piro, O Sportolari, F TI Three-frequency resonances in coupled phase-locked loops SO IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS LA English DT Article DE coupled oscillators; partial mode locking; phase-locked loops; quasi-periodicity; three-frequency resonances; weak resonances ID CAPTURE RANGE; CHAOS; OSCILLATORS; SYNCHRONIZATION; LOCKING; BROADEN AB We construct an experimental model of a nonlinear dynamical system with three frequencies. With this analog electronic circuit made up of quasi-periodically forced coupled phase-locked loops, we investigate the structure of the scaling of three-frequency resonances or lockings in the dynamics. We hypothesize and confirm experimentally that for weak coupling the three-frequency resonance with the largest frequency-locked plateau in the space of parameters in the interval between two adjacent resonances p/q and r/s is given by the mediant (p + r)/(q + s), We expect this to be universal behavior in systems of three-coupled oscillators. C1 Univ Nacl La Plata, LEICI, La Plata, Buenos Aires, Argentina. Inst Andaluz Ciencias Tierra, Granada, Spain. CNR, Ist Lamel, I-40126 Bologna, Italy. Univ Illes Balears, IMEDEA, Balears, Spain. RP Calvo, O, Univ Nacl La Plata, LEICI, La Plata, Buenos Aires, Argentina. NR 30 TC 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA SN 1057-7122 J9 IEEE TRANS CIRCUIT SYST-I JI IEEE Trans. Circuits Syst. I-Fundam. Theor. Appl. PD APR PY 2000 VL 47 IS 4 BP 491 EP 497 PG 7 SC Engineering, Electrical & Electronic GA 314WR UT ISI:000087081000007 ER PT J AU Lazio, TJW Fey, AL Dennison, B Mantovani, F Simonetti, JH Alberdi, A Foley, AR Fiedler, R Garrett, MA Hirabayashi, H Jauncey, DL Johnston, KJ Marcaide, J Migenes, V Nicolson, GD Venturi, T TI The extreme scattering event toward PKS 1741-038: VLBI images SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : general; quasars : individual (1741-038); radio continuum : ISM; scattering ID REFERENCE FRAME SOURCES; COMPACT RADIO-SOURCES; INTERSTELLAR-MEDIUM; PLASMA; SCINTILLATION; SPECTRUM; DENSITY; MHZ AB We report multiepoch VLBI observations of the source PKS 1741-038 (OT 068) as it underwent an extreme scattering event (ESE). Observations at four epochs were obtained, and images were produced at three of these. One of these three epochs was when the source was near the minimum flux density of the ESE, the other two were as the flux density of the source was returning to its nominal value. The fourth epoch was at the maximum flux density during the egress from the ESE, but the VLBI observations had too few stations to produce an image. During the event the source consisted of a dominant, compact component, essentially identical to the structure seen outside the event. However, the source's diameter increased slightly at 13 cm, from near 0.6 mas outside the ESE to near 1 mas during the ESE. An increase in the source's diameter is inconsistent with a simple refractive model in which a smooth refractive lens drifted across the line of sight to PKS 1741-038. We also see no evidence for ESE-induced substructure within the source or the formation of multiple images, as would occur in a strongly refractive lens. However, a model in which the decrease in flux density during the ESE occurs solely because of stochastic broadening within the lens requires a larger broadening diameter during the event than is observed. Thus, the ESE toward PKS 1741-038 involved both stochastic broadening and refractive defocusing within the lens. If the structure responsible for the ESE has a size of order I AU, the level of scattering within an ESE lens may be a factor of 10(7) larger than that in the ambient medium. A filamentary structure could reduce the difference between the strength of scattering in the lens and ambient medium, but there is no evidence for a refractively induced elongation of the source. We conclude that, if ESEs arise from filamentary structures, they occur when the filamentary structures are seen lengthwise. We are able to predict the amount of pulse broadening that would result from a comparable lens passing in front of a pulsar. The pulse broadening would be no more than 1.1 mu s, consistent with the lack of pulse broadening detected during ESEs toward the pulsars PSR B1937+21 and PSR J1643-1224. The line of sight toward PKS 1741-038 is consistent with a turbulent origin for the structures responsible for ESEs. The source PKS 1741-038 lies near the radio Loop I and is seen through a local minimum in 100 mu m emission. C1 USN, Res Lab, Washington, DC 20375 USA. USN Observ, Washington, DC 20392 USA. Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA. CNR, Ist Radioastron, I-40129 Bologna, Italy. CSIC, Inst Astrofis Andalucia, Granada, Spain. Netherlands Fdn Res Astron, NL-7990 AA Dwingeloo, Netherlands. Joint Inst VLBI, NL-7990 AA Dwingeloo, Netherlands. Inst Space & Astronaut Sci, Sagamihara, Kanagawa 229, Japan. Australia Telescope Natl Facil, Epping, NSW 2121, Australia. Univ Valencia, Dept Astron, E-46100 Burjassot, Spain. Univ Guanajuato, Dept Astron, Guanajuato 36000, Mexico. Hartebeesthoek Radio Astron Observ, ZA-1740 Krugersdorp, South Africa. RP Lazio, TJW, USN, Res Lab, Code 7213, Washington, DC 20375 USA. NR 29 TC 9 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2000 VL 534 IS 2 PN Part 1 BP 706 EP 717 PG 12 SC Astronomy & Astrophysics GA 320ZA UT ISI:000087429400017 ER PT J AU Ortiz, JL Sada, PV Rubio, LRB Aceituno, FJ Aceituno, J Gutierrez, PJ Thiele, U TI Optical detection of meteoroidal impacts on the Moon SO NATURE LA English DT Article ID ATMOSPHERE AB Impacts of meteoroids on the Moon should cause detectable optical flashes(1), but the population of objects that are big enough is very low, and hitherto no unambiguous impact flashes have been recorded. The flux of meteoroids associated with the Leonid meteor shower of 18 November 1999 was predicted to produce observable flashes on the night side of the Moon(2). Here we report the unambiguous detection of five such impact flashes, three of which were seen simultaneously by other observers(3). We also observed a possible impact flash on 16 July 1999. All of the flashes were of very brief duration (<0.02 s), as expected for high-speed impacts. C1 CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. Univ Monterrey, Dept Fis & Matemat, Nuevo Leon 66238, Mexico. Inst Astrofis Canarias, E-38200 Tenerife, Spain. Ctr Astron Hispano Aleman, Almeria 04080, Spain. RP Ortiz, JL, CSIC, Inst Astrofis Andalucia, Aptdo 3004, Granada 18080, Spain. NR 14 TC 17 PU MACMILLAN PUBLISHERS LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD JUN 22 PY 2000 VL 405 IS 6789 BP 921 EP 923 PG 3 SC Multidisciplinary Sciences GA 326JT UT ISI:000087732700041 ER PT J AU Alvarez-Idaboy, JR Gonzalez-Jonte, R Hernandez-Laguna, A Smeyers, YG TI Reaction mechanism of the acyl-enzyme formation in beta-lactam hydrolysis by means of quantum chemical modeling SO JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM LA English DT Article DE beta-lactam antibiotics; PBP's interaction with the beta-lactam antibiotics; quantum chemical calculations ID SITE-DIRECTED MUTAGENESIS; PENICILLIN-BINDING PROTEINS; GENERAL-BASE CATALYST; ACTIVE-SITE; ESCHERICHIA-COLI; ASPARTATE-AMINOTRANSFERASE; SEMIEMPIRICAL METHODS; BACTERIAL-RESISTANCE; CRYSTAL-STRUCTURE; RESOLUTION AB The acylation step of the beta-lactam hydrolysis by a class A P-lactamase has been modeled by means of the quantum chemical PM3 method. A model of the catalytic site of the protein has been built using two segments of three and four amino acids, respectively, which include four of the most important residues of the enzyme. The mechanism is based on that proposed by Strynadka et al, in 1992 (Strynadka et al,, Nature 359 (1992) 700-705). The results confirm that Lys-73 is expected to be unprotonated in the wild-type enzyme, and therefore acts as a general base in the acylation step of the reaction, Previous contradictory results are discussed, and a new proton transfer pathway from Lys-73 to p-lactam nitrogen is proposed. (C) 2000 Elsevier Science B.V. All rights reserved. C1 CSIC, Inst Estructura Mat, E-28006 Madrid, Spain. Univ La Habana, Fac Quim, Lab Quim Computac & Teoria, Havana 10400, Cuba. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. RP Smeyers, YG, CSIC, Inst Estructura Mat, Serrano 123, E-28006 Madrid, Spain. NR 56 TC 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 J MOL STRUC-THEOCHEM JI Theochem-J. Mol. Struct. PD JUN 12 PY 2000 VL 504 BP 13 EP 28 PG 16 SC Chemistry, Physical GA 327UY UT ISI:000087813300003 ER PT J AU Vazquez, R Lopez-Martin, L Miranda, LF Esteban, C Torrelles, JM Arias, L Raga, AC TI Bow-shocks and possible jet-shell interaction in the planetary nebula M 2-48 SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE ISM : jets and outflows; ISM : planetary nebulae :; individual : M 2-48 ID EPISODIC JET; BIPOLAR; MICROSTRUCTURES; OUTFLOWS; FLIERS AB Deep narrow band CCD images in the Ha, [O III] lambda 5007 Angstrom, [N II] lambda 6584 Angstrom, and [S II] lambda 6717 + 31 Angstrom emission lines have been obtained for the planetary nebula M 2-48. The discovery of a pair of symmetric low-excitation bow-shocks, separated by 4', and forming a highly collimated bipolar outflow, is presented. The bow-shocks are emitting in [O III] and present the ionization structure expected from working surfaces of collimated jets, pointing out that these structures are tracing regions with shocked gas at high velocities (> 100 km s(-1)). In addition, an internal bipolar outflow (60 " x 30 ") and an apparent off-center semi-circular shell (size approximate to 110 ") are also detected. An enhancement of low-excitation line emission is observed in the shell along the outflow axis. This result can be interpreted in terms of a jet-shell interaction. C1 UNAM, Inst Astron, Ensenada 22860, Baja California, Mexico. UNAM, Inst Astron, Circuito Invest Cient, Mexico City 06510, DF, Mexico. CSIC, Inst Astrofis Andalucia, Granada 18008, Spain. Inst Astrofis Canarias, La Laguna 38200, Tenerife, Spain. CSIC, Inst Estudis Espacials Catalunya, Barcelona 08034, Spain. CSIC, Inst Ciencias Espacio, Barcelona 08034, Spain. RP Vazquez, R, UNAM, Inst Astron, Km 103 Carretera Tijuana, Ensenada 22860, Baja California, Mexico. NR 22 TC 10 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2000 VL 357 IS 3 BP 1031 EP 1034 PG 4 SC Astronomy & Astrophysics GA 328KX UT ISI:000087851000034 ER PT J AU Sotolongo-Costa, O Antoranz, JC Posadas, A Vidal, F Vazquez, A TI Levy flights and earthquakes SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID SELF-ORGANIZED CRITICALITY; TEMPORAL ANALYSIS; BETIC CORDILLERA; SPAIN; SERIES AB Levy flights representation is proposed to describe earthquake characteristics like the distribution of waiting times and position of hypocenters in a seismic region. Over 7500 microearthquakes and earthquakes from 1985 to 1994 were analyzed to test that its spatial and temporal distributions are such that can be described by a Levy flight with anomalous diffusion (in this case in a subdiffusive regime). Earthquake behavior is well described through Levy flights and Levy distribution functions such as results show. C1 Univ La Habana, Dept Fis Teor, La Habana 10400, Cuba. UNED, Fac Ciencias, Dept Fis Matemat & Fluidos, Madrid 28040, Spain. Univ Almeria, Dipartimento Fis Aplicada, Almeria 04120, Spain. Ministerio Fomento, Inst Geograf Nacl, Madrid 28003, Spain. Inst Andaluz Geofis, Granada, Spain. RP Sotolongo-Costa, O, Univ La Habana, Dept Fis Teor, La Habana 10400, Cuba. NR 19 TC 14 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 1 PY 2000 VL 27 IS 13 BP 1965 EP 1968 PG 4 SC Geosciences, Multidisciplinary GA 331LY UT ISI:000088021600042 ER PT J AU Pagano, EA Chueca, A Lopez-Gorge, J TI Expression of thioredoxins f and m, and of their targets fructose-1,6-bisphosphatase and NADP-malate dehydrogenase, in pea plants grown under normal and light/temperature stress conditions SO JOURNAL OF EXPERIMENTAL BOTANY LA English DT Article DE thioredoxins; FBPase; light; temperature; stress; pea plants ID LOW-TEMPERATURE; PHOTOSYNTHETIC FRUCTOSE-1,6-BISPHOSPHATASE; MESSENGER-RNA; REDOX STATE; CHLOROPLAST; LIGHT; REDUCTION; SEQUENCE; PROTEIN; PURIFICATION AB Thioredoxins (Trxs) f and m, as well as their targets chloroplast fructose-1,6-bisphosphatase (FBPase) and NADP(+)-malate dehydrogenase (NADP-MDH), displayed transcriptional expression in both photosynthetic and non-photosynthetic organs of pea plants (Pisum sativum L, cv, Lincoln) grown for 50 d under normal irradiance, However, whereas Trx m and both target enzymes were poorly expressed in non-photosynthetic tissues, the content of the precursor form of the Trx f-specific mRNA was high in pea roots. In contrast, the translational expression of Trx f was low in this organ, The high FBPase activity in immature seeds, and the low activity of leaves, must be related to high starch synthesis in the first, and with high sucrose formation in the second. The transcriptional expression of FBPase and NADP(+)-MDH, and to a lesser extent that of Trxs f and m, was inhibited under low irradiance in plants grown under both normal and high temperatures. Pea plants grown at low temperature displayed a high level of mRNAs for Trxs and their targets, especially when the growth was carried out at low light. To a lesser extent, similar behaviour was observed at the protein level, Chloroplasts of mesophyll leaf cells of pea plants grown under saturating light, or under sub-saturating continuous irradiance, showed broken envelopes, distorted structural elements and disorganized starch grains, as a consequence of a photobleaching process and high starch accumulation. C1 CSIC, Estac Expt Zaidlin, Dept Plant Biochem, E-18008 Granada, Spain. Univ Buenos Aires, Fac Agron, RA-1053 Buenos Aires, DF, Argentina. RP Lopez-Gorge, J, CSIC, Estac Expt Zaidlin, Dept Plant Biochem, E-18008 Granada, Spain. NR 48 TC 8 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0022-0957 J9 J EXP BOT JI J. Exp. Bot. PD JUL PY 2000 VL 51 IS 348 BP 1299 EP 1307 PG 9 SC Plant Sciences GA 340EC UT ISI:000088519300015 ER PT J AU Uc, VH Garcia-Cruz, I Hernandez-Laguna, A Vivier-Bunge, A TI New channels in the reaction mechanism of the atmospheric oxidation of toluene SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID AROMATIC-HYDROCARBONS; ORTHO-XYLENE; OH-RADICALS; PHOTOOXIDATIONS; PRODUCTS; KINETICS AB Two different theoretical approaches are used to study the OH radical attack on toluene: the Molleer-Plesset perturbation theory and the B3LYP density functional method. The critical points of the potential energy surface for the OH addition to toluene are determined, and rate-equilibrium relationships are discussed. A stable structure corresponding to a prereactive complex which is formed when the OH radical is at about 2.5 Angstrom from toluene is obtained. The existence of this loosely bound system is necessary to explain the experimentally observed negative activation energy. The geometry of transition states and products are determined for addition at different positions in the ring, including the ipso position, which has not been considered in previous works. Energy results at the MP4 and coupled cluster levels calculated at the optimized MP2 and B3LYP geometries confirm that the ipso adduct is more stable than the ortho adduct by about 0.5 kcal/mol. Several routes are proposed for the subsequent reactions of the ipso adduct, which could explain the very high yield of o-cresol with respect to the other cresol isomers. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, Mexico. Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico. RP Vivier-Bunge, A, CSIC, Estac Expt Zaidin, C Prof Albareda N1, E-18008 Granada, Spain. NR 44 TC 28 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 24 PY 2000 VL 104 IS 33 BP 7847 EP 7855 PG 9 SC Chemistry, Physical; Physics, Atomic, Molecular & Chemical GA 347UQ UT ISI:000088947900016 ER PT J AU Fracchia, S Garcia-Romera, I Godeas, A Ocampo, JA TI Effect of the saprophytic fungus Fusarium oxysporum on arbuscular mycorrhizal colonization and growth of plants in greenhouse and field trials SO PLANT AND SOIL LA English DT Article DE arbuscular mycorrhizal fungi; field experiments; Fusarium oxysporum; plant growth; saprobe fungi ID GLOMUS-MOSSEAE; SOIL; TRICHODERMA; INOCULATION; PHOSPHORUS; PROPAGULES; ENDOPHYTES; INFECTION; STRAINS; ROOTS AB Effects of the saprophytic fungus Fusarium oxysporum on arbuscular mycorrhizal (AM) colonization and plant dry matter were studied in greenhouse and field experiments. Host plants: maize (Zea mays L.), sorghum (Sorghum vulgare L.), lettuce ( Lactuca sativa L.), tomato (Lycopersicum esculentum L.), wheat (Triticum vulgare L), lentil (Ervum lens L.) and pea (Pisum sativum L.), the AM fungi: Glomus mosseae, G. fasciculatum, G. intraradices, G. clarum, and G. deserticola and the carriers for F. oxysporum inoculum: aqueous solution, thin agar slices, and pellets of agar and alginate were tested under greenhouse conditions. Greatest plant growth and AM colonization responses in sterilized and unsterilized soils were observed with pea, Glomus deserticola and sodium alginate pellets as the carrier for F. oxysporum inoculum. Under field conditions, adding F. oxysporum increased the survival of transplanted pea, possibly through a beneficial effect on AM fungi. Application of F. oxysporum increased shoot dry matter, N and P concentrations of pea and sorghum plants, and the level of AM colonization attained by indigenous or introduced AM fungi. These parameters were similar in plants inoculated with either G. deserticola or with the indigenous AM fungi. Application of the saprophytic fungus increased the number of propagules of AM fungi in field plots in which pea was grown, but this increase was not sufficient to increase AM colonization of sorghum after the pea crop. C1 CSIC, Dept Microbiol, Estac Expt Zaidin, E-18008 Granada, Spain. RP Fracchia, S, Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. NR 33 TC 17 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0032-079X J9 PLANT SOIL JI Plant Soil PY 2000 VL 223 IS 1-2 BP 175 EP 184 PG 10 SC Agronomy; Plant Sciences; Soil Science GA 351CF UT ISI:000089137900015 ER PT J AU Alfaro, EJ Moreno, E Franco, J TI Kinematics of Gould's belt: Model and observations SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID HIPPARCOS DATA; MOVING GROUPS; STARS; IDENTIFICATION; SAMPLE; GAS AB Using the available data for nearby stars we derive the velocity ellipsoid of dwarf O-B5.5 stars belonging to the Gould Belt (GB). The resulting vertex deviation for the whole sample is negative (l(v) approximate to -70 degrees) and this value is modified to l(v) approximate to 20 degrees when the members of the Pleiades moving group are removed from the sample. This implies the existence of, at least, two different kinematic groups defining the GB system. We also model the evolution of a supershell in the solar neighborhood, and obtain a fit to the shape and kinematics of the gas in GB. Assuming that the expanding shell is also forming stars, we obtain the corresponding velocity fields for the shell and its newly formed stars. The average vertex deviation value resulting from these models for the new stars is l(v) approximate to 20 degrees, and is consistent with the observed value when the Pleiades moving group members are excluded from the GB. C1 CSIC, Inst Astrofis Andalucia, Granada, Spain. Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. RP Alfaro, EJ, CSIC, Inst Astrofis Andalucia, Apartado 3004, Granada, Spain. NR 27 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2000 VL 272 IS 1-3 BP 53 EP 59 PG 7 SC Astronomy & Astrophysics GA 351DH UT ISI:000089142200008 ER PT J AU Marquez, I Durret, F Masegosa, J Moles, M Delgado, RMG Marrero, I Maza, J Perez, E Roth, M TI Near-infrared photometry of isolated spirals with and without an AGN II. Photometric properties of the host galaxies SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : active; galaxies : fundamental parameters; galaxies : photometry; infrared : galaxies ID BAND SURFACE PHOTOMETRY; DISK DOMINATED GALAXIES; NUCLEAR ACTIVITY; SEYFERT-GALAXIES; STRUCTURAL-PROPERTIES; SECULAR EVOLUTION; STAR-FORMATION; BARS; BULGE; PARAMETERS AB We present here the analysis of morphological and photometric properties of a sample of isolated spirals with (18) and without (11) an active nucleus, based on near-infrared imaging in the J and K' bands (Paper I). The aim of that comparative analysis is to find the differential properties that could be directly connected with the phenomenon of nuclear activity. We stress the importance of using isolated objects for that purpose. Our study shows that both sets of galaxies are similar in their global properties: they define the same Kormendy relation, their disk components share the same properties, the bulge and disk scale lengths are correlated in a similar way, bar strengths and lengths are similar for primary bars. Our results therefore indicate that hosts of isolated Seyfert galaxies have bulge and disk properties comparable to those of isolated non active spirals. Central colors (the innermost 200 pc) of active galaxies are redder than the centers of non active spirals, most probably due to AGN light being re-emitted by the hot dust and/or due to circumnuclear star formation, through the contribution of giants/supergiants. Central to our analysis is the study of the possible connection between bars and similar non axisymmetric structures with the nuclear fuelling. We note that only one of the Seyfert galaxies in our sample, namely ESO 139-12, does not present a primary bar. But bars are equally present in active and control objects. The same applies to secondary bars. Not all the active galaxies we have observed have them, and some control galaxies also present such central structures. Secondary central elongations (associated with secondary bars, lenses, rings or disks) may be somewhat different,, but this result should be confirmed with larger samples. We note that numerical models indicate that such secondary bars are not strictly necessary to feed the central engine when a primary bar is present. Our results show that down to scales of 100-300 pc, there are no evident differences between active and non active spiral galaxies. C1 CSIC, Inst Astrofis Andalucia, Granada, Spain. CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Paris 07, UA 173, Observ Paris, DAEC, F-92195 Meudon, France. CSIC, Inst Matemat & Fis Fundamental, Madrid, Spain. Obser Astron Nacl, Madrid, Spain. Univ Chile, Dept Astron, Santiago, Chile. Observ Carnegie Inst Washington, Pasadena, CA 91101 USA. RP Marquez, I, CSIC, Inst Astrofis Andalucia, Apartado 3004, Granada, Spain. NR 48 TC 23 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG 10 PY 2000 VL 360 IS 2 BP 431 EP 438 PG 8 SC Astronomy & Astrophysics GA 354LF UT ISI:000089331400007 ER PT J AU Mavrogiannis, LA Baxova, A Kutilek, S Kim, CA Sugayama, SM Salamanca, A Wall, SA Antonopoulou, I Morriss-Kay, GM Wilkie, AOM TI Mutations of the homeobox gene ALX4 in parietal foramina and cranium bifidum: a component of DEFECT 11 syndrome. SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 John Radcliffe Hosp, Inst Mol Med, Cranofacial Unit, Oxford OX3 9DU, England. Charles Univ, Dept Paediat & Med Genet, CR-11636 Prague 1, Czech Republic. Inst Crianca, Sao Paulo, Brazil. Dept Obstet & Ginecol, Granada, Spain. Univ Oxford, Dept Human Anat & Genet, Oxford, England. NR 0 TC 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0002-9297 J9 AMER J HUM GENET JI Am. J. Hum. Genet. PD OCT PY 2000 VL 67 IS 4 SU Suppl. 2 BP 40 EP 40 PG 1 SC Genetics & Heredity GA 355TA UT ISI:000089400700147 ER PT J AU Sahu, KC Vreeswijk, P Bakos, G Menzies, JW Bragaglia, A Frontera, F Piro, L Albrow, MD Bond, IA Bower, R Caldwell, JAR Castro-Tirado, AJ Courbin, F Dominik, M Fynbo, JU Galama, T Glazebrook, K Greenhill, J Gorosabel, J Hearnshaw, J Hill, K Hjorth, J Kane, S Kilmartin, PM Kouveliotou, C Martin, R Masetti, N Maxted, P Minniti, D Moller, P Muraki, Y Nakamura, T Noda, S Ohnishi, K Palazzi, E van Paradijs, J Pian, E Pollard, KR Rattenbury, NJ Reid, M Rol, E Saito, T Sackett, PD Saizar, P Tinney, C Vermaak, P Watson, R Williams, A Yock, P Dar, A TI Discovery of the optical counterpart and early optical observations of GRB 990712 SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; gamma rays : bursts ID GAMMA-RAY BURST; HUBBLE-SPACE-TELESCOPE; 28 FEBRUARY 1997; 25 APRIL 1998; ERROR BOX; AFTERGLOW; SUPERNOVA; GALAXY; GRB-970508; EMISSION AB We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands during the first similar to 35 days after the outburst. The observed light curves were fitted with a power-law decay for the optical transient (OT), plus an additional component that was treated in two different ways. First, the additional component was assumed to be an underlying galaxy of constant brightness. The resulting slope of the decay is 0.97(-0.02)(+0.05), and the magnitudes of the underlying galaxy are V = 22.3 +/- 0.05, R = 21.75 +/- 0.05, and I = 21.35 +/- 0.05. Second, the additional component was assumed to be a galaxy plus an underlying supernova with a time-variable brightness identical to that of GRB 980425, appropriately scaled to the redshift of GRB 990712. The resulting slope of the decay is similar, but the goodness of fit is worse, which would imply that either this GRB is not associated with an underlying supernova or the underlying supernova is much fainter than the supernova associated with GRB 980425. The galaxy in this case is fainter: V = 22.7 +/- 0.05, R = 22.25 +/- 0.05, and I = 22.15 +/- 0.05, and the OT plus the underlying supernova at a given time is brighter. Measurements of the brightnesses of the OT and the galaxy by late-time Hubble Space Telescope observation and ground-based observations can thus assess the presence of an underlying supernova. C1 Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Konkoly Observ Budapest, H-1525 Budapest, Hungary. Univ Bologna, Inst TeSRE, I-40127 Bologna, Italy. S African Astron Observ, ZA-7935 Cape Town, South Africa. Osservatorio Astron Bologna, I-40127 Bologna, Italy. CNR, Ist Astrofis Spaziale, Rome, Italy. Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand. Univ Auckland, Fac Sci, Auckland 1, New Zealand. Univ Durham, Dept Phys, Durham DH1 3LE, England. INTA, LAEFF, Madrid 28080, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Pontificia Univ Catolica Chile, Dept Astron, Santiago 22, Chile. Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands. Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark. CALTECH, Palomar Observ, Pasadena, CA 91125 USA. Anglo Australian Observ, Epping, NSW 2121, Australia. Univ Tasmania, Dept Phys, Hobart, Tas 7001, Australia. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. NASA, George C Marshall Space Flight Ctr, Univ Space Res Assoc, Huntsville, AL 35812 USA. Perth Observ, Perth, WA 6076, Australia. Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England. European So Observ, D-85748 Garching, Germany. Nagoya Univ, Solar Terr Environm Lab, Chikusa Ku, Nagoya, Aichi 4648601, Japan. Kyoto Univ, Yukawa Inst, Kyoto, Japan. Nagano Natl Coll Technol, Nagano, Japan. Univ Alabama, Dept Phys, Huntsville, AL 35899 USA. Victoria Univ Wellington, Dept Phys, Wellington, New Zealand. Tokyo Metropolitan Coll Aeronaut, Tokyo, Japan. Lincoln Univ Coll, Buenos Aires, DF, Argentina. Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel. Technion Israel Inst Technol, Space Res Inst, IL-32000 Haifa, Israel. RP Sahu, KC, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA. NR 42 TC 29 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 2000 VL 540 IS 1 PN Part 1 BP 74 EP 80 PG 7 SC Astronomy & Astrophysics GA 356CW UT ISI:000089427600009 ER PT J AU Galleguillos, C Aguirre, C Barea, JM Azcon, R TI Growth promoting effect of two Sinorhizobium meliloti strains (a wild type and its genetically modified derivative) on a non-legume plant species in specific interaction with two arbuscular mycorrhizal fungi SO PLANT SCIENCE LA English DT Article DE Sinorhizobium; arbuscular mycorrhizal fungi; specific interactions; non-legume plant; PGPR ID RHIZOBIUM-LEGUMINOSARUM; NODULATION COMPETITIVENESS; MEDICAGO-SATIVA; COLONIZATION; MORPHOLOGY; IMPACT AB In the present study, we have investigated whether the ubiquitous rhizosphere soil organism Sinorhizobium meliloti has a plant growth promoting (PGP) effect on non-leguminous plant species. Such PGP activity was investigated for both a wild type strain and its genetically modified (GM) derivative, which had an enhanced biofertilizer capability. The PGP effect of these rhizobial strains was tested in interaction with two arbuscular-mycorrhizal (AM) fungi: G. mosseae or G. intraradices on lettuce (Lactuca sativa L.) plants. Both rhizobial strains were efficient in increasing lettuce biomass and also induced modifications on root morphology, particularly in mycorrhizal plants; thus these strains behave as plant growth promoting rhizobacteria. In non-mycorrhizal plants, both strains exhibited a similar growth promoting effect on lettuce. However, both rhizobial strains differed in mycorrhizal plants with regard to (i) biomass production, (ii) the length of axis and lateral roots, and (iii) the number of lateral roots formed; effects which were, in turn, affected by the AM fungus involved. Microbial treatments were more effective on root growth and morphology at earlier developmental stages (20 days of plant growth) but, in a later stage (after 40 days), the microbial effects were more relevant at increasing plant biomass. The interaction between the GM rhizobial strain and G. mosseae produced the highest growth promoting effect (476% over control), in spite of the fact that G. intraradices showed a quicker and higher colonization ability than G. mosseae. Microbial interactions inducing PGP effects did not benefit AM colonization nor the succinate dehydrogenase activity in the AM fungal mycelium. Irrespective of the underlying mechanisms, which are being now investigated, the interactions between rhizobial strains, as free-living saprophs, and AM fungi are noteworthy, and depend on the microbial genotype involved. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Univ Nacl Agr, Dept uso & Manejo Suelos, Managua, Nicaragua. Pontificia Univ Catolica Valparaiso, Inst Biol, Valparaiso, Chile. RP Azcon, R, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1, E-18008 Granada, Spain. EM raczon@eez.csic.es NR 31 TC 16 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0168-9452 J9 PLANT SCI JI Plant Sci. PD OCT 8 PY 2000 VL 159 IS 1 BP 57 EP 63 PG 7 SC Biochemistry & Molecular Biology; Plant Sciences GA 361AB UT ISI:000089698600007 ER PT J AU Tenorio-Tagle, G Munoz-Tunon, C Perez, E Maiz-Apellaniz, J Medina-Tanco, G TI On the ongoing multiple blowout in NGC 604 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : ISM; HII regions; ISM : individual (NGC 604); ISM : kinematics and dynamics ID H-II REGIONS; EVOLUTION; NGC-604; GAS; GALAXIES; M33 AB Several facts regarding the structure of NGC 604 are examined here. The three main cavities produced by the mechanical energy from massive stars, which in NGC 604 are spread over a volume of 10(6) pc(3), are shown here to be undergoing blowout into the halo of M33. High-resolution long-slit spectroscopy is used to track the impact from massive stars, while Hubble Space Telescope archive data are used to display the asymmetry of the nebula. NGC 604 is found to be a collection of photoionized filaments and sections of shells that are in direct contact with the thermalized matter ejected by the massive stars. The multiple blowout events presently drain the energy injected by massive stars, and thus the densest photoionized gas is found almost at rest and is expected to suffer a slow evolution. C1 Inst Nacl Astrofis Opt & Elect, Puebla 72840, Mexico. Inst Astrofis Canarias, E-38200 Tenerife, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 28080, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Sao Paulo, Dept Astron, Inst Astron & Geofis, BR-01060970 Sao Paulo, Brazil. RP Tenorio-Tagle, G, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51& 216, Puebla 72840, Mexico. NR 24 TC 5 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 1 PY 2000 VL 541 IS 2 PN Part 1 BP 720 EP 727 PG 8 SC Astronomy & Astrophysics GA 363FT UT ISI:000089825000020 ER PT J AU Rubio, LRB Ortiz, JL Sada, RV TI Luminous efficiency in hypervelocity impacts from the 1999 lunar Leonids SO ASTROPHYSICAL JOURNAL LA English DT Article DE meteors, meteoroids; Moon; plasmas; radiation mechanisms : thermal ID METEOROIDS; SEARCH; STREAM AB An analysis of the optical flashes produced by Leonid meteoroids impacting the Moon in 1999 November is carried out in order to estimate the fraction of kinetic energy converted into radiation, the so-called luminous efficiency eta. It is shown that the observational data are consistent with luminous efficiencies of 2 x 10(-3) in the wavelength range of 400-900 nm with an uncertainty of about 1 order of magnitude. This experimental value of eta is significantly larger than previous estimates for meteoroids of asteroidal composition based on numerical calculations and scaling laws from laboratory collisions. According to our results, the luminous efficiency might vary with mass, i.e., the smaller impactors converting less kinetic energy into light and vice versa. A comparison with recent numerical simulations for meteoroids of cometary composition is also carried out. C1 Inst Astrofis Canarias, E-38200 La Laguna, Canary Islands, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Monterrey, Dept Fis & Matemat, Monterrey 66238, Nuevo Leon, Mexico. RP Rubio, LRB, Inst Astrofis Canarias, Via Lactea, E-38200 La Laguna, Canary Islands, Spain. NR 26 TC 15 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 10 PY 2000 VL 542 IS 1 PN Part 2 BP L65 EP L68 PG 4 SC Astronomy & Astrophysics GA 365MF UT ISI:000089954500017 ER PT J AU Romero, E Matallo, MB Pena, A Sanchez-Rasero, F Schmitt-Kopplin, P Dios, G TI Dissipation of racemic mecoprop and dichlorprop and their pure R-enantiomers in three calcareous soils with and without peat addition SO ENVIRONMENTAL POLLUTION LA English DT Article DE soil; peat; dissipation; enantioselective degradation; enantiomerization; mecoprop; dichlorprop ID PHENOXYALKANOIC ACID HERBICIDES; PERFORMANCE CAPILLARY ELECTROPHORESIS; ENANTIOSELECTIVE DEGRADATION; CONVERSION REACTIONS; CHIRAL HERBICIDE; SEPARATION; AQUIFER AB Two racemic herbicides, mecoprop (R,S-MCPP) and dichlorprop (R,S-DCPP), as well as their enantiopure R-forms, were incubated in three calcareous soils at 15 degreesC and 80% of their field capacity to try to elucidate their behaviour in soil and compare the dissipation rates when racemic and enantiopure compounds are used. Quantitation of pesticides is made by HPLC and the R/S ratio by GC-MS. The inactive S-enantiomer from the racemic forms persists longer than the R-forms in silt and sandy loam soils, but for shorter time in the clay loam soil. The pure R-enantiomers, both for MCPP and DCPP, after incubation in soil, are partially converted into their S-forms. In all cases, the dissipation of racemic and pure enatiomeric forms is lower in the clay loam soil than in the silt and sandy loam soils. The R-forms' peristence, in the three soils, is approximately two times lower when they are incubated alone than when they are incubated as racemic compounds. When peat is added, the persistence of these herbicides in the silt and sandy loam soils increases, while in the clay loam soil it decreases. Besides, in the clay loam soil, the enantiomeric ratio (ER) changes from its S-preferential degradation to a preferential degradation of its R-form, so an increase in the persistence of the inactive S-form occurs. (C) 2000 Elsevier Science Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Ist Biol, BR-01402023 Sao Paulo, Brazil. GSF Forschungszentrum Umwelt & Gesundheit GMBH, Inst Okol Chem, D-85764 Neuherberg, Germany. RP Romero, E, CSIC, Estac Expt Zaidin, Profesor Albareda 1, E-18008 Granada, Spain. NR 20 TC 14 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0269-7491 J9 ENVIRON POLLUT JI Environ. Pollut. PY 2001 VL 111 IS 2 BP 209 EP 215 PG 7 SC Environmental Sciences GA 365YU UT ISI:000089978700004 ER PT J AU Valero-Garces, BL Delgado-Huertas, A Ratto, N Navas, A Edwards, L TI Paleohydrology of Andean saline lakes from sedimentological and isotopic records, Northwestern Argentina SO JOURNAL OF PALEOLIMNOLOGY LA English DT Article DE saline lakes; stable isotope; sedimentology; mineralogy; paleohydrology; Altiplano; Holocene; Little Ice Age ID NINO SOUTHERN OSCILLATION; QUELCCAYA ICE CAP; LAST 1000 YEARS; NORTHERN CHILE; LACUSTRINE CARBONATES; CLIMATIC FLUCTUATIONS; ATACAMA-ALTIPLANO; STABLE-ISOTOPE; HOLOCENE; STRATIGRAPHY AB The paleohydrological evolution of several high altitude, saline lakes located in the southernmost Altiplano (El Peinado and San Francisco basins, Catamarca province, NW Argentina) was reconstructed applying sedimentological, geochemical and isotopic techniques. Several playa lakes from the San Francisco basin (26 degrees 56' S; 68 degrees 08' W, 3800-3900 m a.s.l.) show evidence of a recent raise in the watertable that led to modern deposition of carbonate and diatomaceous muds. A 2 m - long core from El Peinado Lake (26 degrees 29' 59 " S, 68 degrees 05' 32 " W, 3820 m a.s.l.) consists of calcitic crusts (unit 3), overlaid by an alternation of macrophyte-rich and travertine clast- rich, laminated muds (unit 2), and topped by travertine facies (unit 1). This sedimentary sequence illustrates a paleohydrological evolution from a subaerial exposure (unit 3) to a high lake stand (unit 2), and a subsequent smaller decrease in lake level (unit 1). The delta C-13(organic matter) record also reflects the lake transgression between units 3 and 2. Although there is a general positive correlation between delta O-18(carbonate) and salinity proxies (Na, Li and B content), the large data dispersion indicates that other factors besides evaporation effects control chemical and isotopic composition of lakewater. Consequently, the oxygen isotopic composition cannot be interpreted exclusively as an indicator of salinity or evaporation ratio. The degassing of CO2 during groundwater discharge can explain the enriched delta C-13 values for primary carbonates precipitated. The carbon budget in these high altitude, saline lakes seems to be controlled by physical rather than biological processes. The Altiplano saline lakes contain records of environmental and climatic change, although accurate C-14 dating of these lacustrine sediments is hindered by the scarcity of terrestrial organic material, and the large reservoir effects. Sedimentologic evidence, a Pb-210-based chronology, and a preliminary U/Th chronology indicate a very large reservoir effect in El Peinado, likely as a result of old groundwaters and large contributions of volcanic and geothermal C-14-free CO2 to the lake system. Alternative chronologies are needed to place these paleorecords in a reliable chronological framework. A period of increased water balance in the San Francisco basin ended at about 1660 +/- 82 yr B.P. (calendar yr U/Th age), and would correlates with the humid phase between 3000 and 1800 yr B.P detected in other sites of the southern Altiplano. Both, Pb-210 and preliminary U/Th dating favor a younger age for the paleohydrological changes in El Peinado. The arid period reflected by subaerial exposure and low lake levels in unit 3 would have ended with a large increase in effective moisture during the late 17th century. The increased lake level during deposition of unit 2 would represent the period between AD1650 - 1900, synchronous to the Little Ice Age. This chronological framework is coherent with other regional records that show an abrupt transition from more arid to more humid conditions in the early 17th century, and a change to modern conditions in the late 19th century. Although there are local differences, the Little Ice Age stands as a significant climatic event in the Andean Altiplano. C1 CSIC, Inst Pirenaico Ecol, E-50080 Zaragoza, Spain. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Buenos Aires, Secc Arqueol, RA-1002 Buenos Aires, DF, Argentina. CSIC, Estac Expt Aula Dei, E-50080 Zaragoza, Spain. Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455 USA. RP Valero-Garces, BL, CSIC, Inst Pirenaico Ecol, Apdo 202, E-50080 Zaragoza, Spain. NR 55 TC 6 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0921-2728 J9 J PALEOLIMNOL JI J. Paleolimn. PD SEP PY 2000 VL 24 IS 3 BP 343 EP 359 PG 17 SC Environmental Sciences; Geosciences, Multidisciplinary; Limnology GA 366BU UT ISI:000089985600008 ER PT J AU Puerta, C Cuervo, P Thomas, MC Lopez, MC TI Molecular characterization of the histone H2A gene from the parasite Trypanosoma rangeli SO PARASITOLOGY RESEARCH LA English DT Article ID MESSENGER-RNA; CRUZI; EXPRESSION; DNA; TRANSCRIPTION; SEQUENCE; BRUCEI; EUKARYOTES; SIALIDASE; KARYOTYPE AB The sequence, genomic organization, and transcription of the gene encoding the H2A histone protein of the protozoan parasite Trypanosoma rangeli is described in this paper. The locus encoding the T. rangeli H2A protein is formed by at least 11 gene units measuring 790 nucleotides in length, organized in tandem, and located in a single chromosome of approximately 1.9 Mb. The gene units actively transcribe only one size class of mRNA measuring 0.7 kb in length. The T. rangeli H2A protein contains in the amino-terminal the AGLXFPV motif, which is conserved in a broad range of H2A proteins, and the RSAK motif, which is implicated in repression of the histone's basal transcription in yeast. The carboxyl-terminal of the protein contains a two-lysine residue described as the ubiquitin binding site and the histidine residue implicated in DNA binding. C1 Univ Javeriana, Dept Microbiol, Bogota, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. RP Puerta, C, Univ Javeriana, Dept Microbiol, Cra 7,N 43-82 Ed Felix Restrepo 111, Bogota, Colombia. NR 42 TC 4 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0932-0113 J9 PARASITOL RES JI Parasitol. Res. PD NOV PY 2000 VL 86 IS 11 BP 916 EP 922 PG 7 SC Parasitology GA 368YX UT ISI:000090146000009 ER PT J AU Covino, E Catalano, S Frasca, A Marilli, E Fernandez, M Alcala, JM Melo, C Paladino, R Sterzik, MF Stelzer, B TI RXJ 0529.4+0041: a low-mass pre-main sequence eclipsing-spectroscopic binary SO ASTRONOMY & ASTROPHYSICS LA English DT Letter DE stars : distances; stars : evolution; stars : fundamental parameters; stars : Hertzsprung-Russel (HR) and C-M diagrams; stars : pre-main sequence ID STARS AB We report the discovery of a low-mass pre-main sequence eclipsing system among a sample of double-lined spectroscopic binaries found recently on the basis of ROSAT followup observations in the Orion star forming region. From the analysis of the available photometric and spectroscopic data, we derive orbital elements as well as fundamental stellar parameters for the individual components of the eclipsing PMS binary RXJ 0529.4+0041. These results provide a new observational test for theoretical PMS evolutionary models setting some useful constraints on currently available PMS tracks and isochrones. C1 Osservatorio Astron Capodimonte, I-80131 Naples, Italy. Osservatorio Astrofis Catania, I-95125 Catania, Italy. Inst Astrofis Andalucia, E-18080 Granada, Spain. Observ Geneva, CH-1290 Sauverny, Switzerland. European So Observ, Santiago 19, Chile. Max Planck Inst Extraterr Phys, D-85740 Garching, Germany. RP Covino, E, Osservatorio Astron Capodimonte, Via Moiariello, I-80131 Naples, Italy. NR 16 TC 22 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2000 VL 361 IS 3 BP L49 EP L52 PG 4 SC Astronomy & Astrophysics GA 369XG UT ISI:000165092600003 ER PT J AU Anglada, G Rodriguez, LF Torrelles, JM TI Discovery of a subarcsecond radio binary associated with the SVS 13 star in the HH 7-11 region SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (HH 7-11); ISM : jets and outflows; radio continuum : ISM; stars : formation; stars : individual (SVS 13) ID HERBIG-HARO OBJECTS; T-TAURI STARS; INFRARED COMPANION; EXCITING SOURCE; NGC-1333; OUTBURST; SSV-13; HH7-11; DISKS; FLOW AB We report the discovery of a double radio continuum source (VLA 4A and 4B) associated with the optically visible star SVS 13. The two components of the radio source are separated by 0".3, corresponding to a projected separation of 65 AU for a distance of 220 pc. We propose that the radio sources trace the components of a binary system. The observed separation implies a lower limit of similar to 135 yr for the orbital period, for a binary system with a total mass of 2 M-.. We suggest that, as in other pre-main-sequence binaries, the two components of the system could be in different evolutionary stages and/or suffer from different extinction, with the more extincted object being associated with the previously reported millimeter source, while the other component would correspond to the visible star SVS 13. Since an increase in the optical/near-infrared brightness of the SVS 13 star was observed around 1990, we speculate that such flux variations could be due to the reappearance of the optical component previously occulted by the circumstellar envelope/disk of dust associated with the millimeter component. The observed separation implies a radius of similar to 60 AU for the presumed dust envelope and suggests an orbital period of similar to 1700 yr and a duration of the occultation of similar to 185 yr. We expect that other subarcsecond binary systems, which remain unresolved, could present an anomalous behavior that may be explained by assuming the presence of a binary system whose components are in different evolutionary stages and/or suffer from different extinction. C1 CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. RP Anglada, G, CSIC, Inst Astrofis Andalucia, Camino Bajo Huetor 24, E-18008 Granada, Spain. NR 35 TC 13 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 20 PY 2000 VL 542 IS 2 PN Part 2 BP L123 EP L126 PG 4 SC Astronomy & Astrophysics GA 369YQ UT ISI:000165095700012 ER PT J AU Rubio, LRB Ortiz, JL Sada, PV TI Observation and interpretation of meteoroid impact flashes on the moon SO EARTH MOON AND PLANETS LA English DT Article DE hypervelocity impacts; Leonids 1999; luminous efficiencies; lunar craters; meteoroids; meteors; Moon ID SEARCH; STREAM AB The first unambiguous detection of meteoroids impacting the night side of the Moon was obtained during the 1999 Leonid storm. Up to eight optical flashes were recorded with CCD video cameras attached to small telescopes on November 18, 1999. Six impacts were videotaped by at least two independent observers at the same times and lunar locations, which is perhaps the strongest evidence for their collisional nature. The flashes were clearly above the noise and lasted for less than 0.02 s. Although previous observational efforts did not succeed in detecting impact flashes, additional candidates have been reported in the literature. The evidence accumulated so far implies that small telescopes equipped with high speed cameras can be used as a new tool for studying meteoroid streams, sporadic meteoroids, and hypervelocity collisions. In this review we discuss the various intervening parameters for detectability of flashes on the night side of the Moon (geometrical effects, contamination by scattered light from the day side, and properties of the meteoroids such as speed and flux of particles). Particular emphasis is placed on the analysis of the observations in order to derive relevant physical parameters such as luminous efficiencies, impactor masses, and crater sizes. Some of these parameters are of interest for constraining theoretical impact models. From a simple analysis, it is possible to derive the mass distribution of the impactors in the kg range. A more elaborate analysis of the data permits an estimate of the fraction of kinetic energy converted to radiation (luminous efficiency) if the meteoroid flux on the Moon is known. Applied to the 1999 lunar Leonids, these methods yield a mass index of 1.6 +/- 0.1 and luminous efficiencies of 2 x 10(-3) with an uncertainty of about one order of magnitude. Predictions of visibility of the major annual meteor showers are given for the next few years. These include the forthcoming 2001 Leonid return, for which we estimate detection rates in the visible. C1 Inst Astrofis Canarias, Tenerife, Spain. CSIC, Inst Astrofis Andalucia, Granada, Spain. Univ Monterrey, Monterrey, Mexico. RP Rubio, LRB, Inst Astrofis Canarias, Tenerife, Spain. EM lbellot@ll.iac.es ortiz@iaa.es NR 32 TC 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANET JI Earth Moon Planets PY 2000 VL 82-3 BP 575 EP 598 PG 24 SC Astronomy & Astrophysics; Geosciences, Multidisciplinary GA 372TM UT ISI:000165250200042 ER PT J AU Bermudez, LE TI Operation Smile: plastic surgery with few resources SO LANCET LA English DT Article C1 Mil Hosp, Dept Plast Surg, Div Craniofacial Surg & Microsurg, Bogota, Colombia. Mil Univ Nueva Granada, Granada, Spain. RP Bermudez, LE, Mil Hosp, Dept Plast Surg, Div Craniofacial Surg & Microsurg, Bogota, Colombia. NR 0 TC 1 PU LANCET LTD PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 0140-6736 J9 LANCET JI Lancet PD DEC PY 2000 VL 356 SU Suppl. S BP S45 EP S45 PG 1 SC Medicine, General & Internal GA 386RG UT ISI:000166074900047 ER PT J AU de Pablo, R Beraun, Y Nieto, A Calzada, JE Rementeria, MC Sanz, L Lopez-Nevot, MA Martin, J TI HLA class I and class II allele distribution in the Peruvian population SO TISSUE ANTIGENS LA English DT Article DE Amerindians; HLA; Peruvian; quechua ID AMERICAN INDIAN TRIBES; B ALLELES; EVOLUTION; POLYMORPHISM; LOCI; DNA AB The distribution of HLA-A, -B, -C, -DRB1 and -DQB1 alleles in the Peruvian population was studied and compared with those of other populations in order to provide further information about their anthropological origin. Our data are consistent with the Mestizo character of this population. In terms of genetic distance Peruvians are closest to Bolivians, which is in agreement with the geographical location and the cultural and anthropological background of the two human groups. Several HLA-B alleles originally described in genetically isolated Amerindian tribes are also present in the sample studied here. This fact and the reported finding of these alleles in several Amerindian groups suggests that they were present in the first wave of humans that populated South America (Paleoindians) before they split to give rise to the different South American tribes. C1 Clin Puerta de Hierro, Serv Immunol, Madrid 28035, Spain. Hosp Nacl Guillermo Almenare EsSALUD, Lima, Peru. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Univ Virgen Nieves, Serv Anal Clin, Granada, Spain. RP de Pablo, R, Clin Puerta de Hierro, Serv Immunol, San Martin de Porres 4, Madrid 28035, Spain. NR 33 TC 13 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0001-2815 J9 TISSUE ANTIGEN JI Tissue Antigens PD DEC PY 2000 VL 56 IS 6 BP 507 EP 514 PG 8 SC Cell Biology; Immunology; Pathology GA 388WK UT ISI:000166205900004 ER PT J AU Ramirez, M Gallardo, EM Souto, AS Weissheimer, C Gil, A TI Plasma fatty-acid composition and antioxidant capacity in low birth-weight infants fed formula enriched with n-6 and n-3 long-chain polyunsaturated fatty acids from purified phospholipids SO CLINICAL NUTRITION LA English DT Article DE lipids; infant nutrition; LCP; arachidonic acid; docosahexaenoic acid ID MARINE-OIL SUPPLEMENTATION; VISUAL-ACUITY DEVELOPMENT; FED BREAST-MILK; 1ST YEAR GROWTH; PRETERM INFANTS; TERM INFANTS; DOCOSAHEXAENOIC ACID; ARACHIDONIC-ACID; GESTATIONAL-AGE; LIPID CLASSES AB Objective: To determine whether a formula containing n - 6 and n - 3 long-chain polyunsaturated fatty acids (LCP) from purified phospholipids increases the content of 20:4n - 6 and 22:6n -3 of plasma lipids and modifies the plasma antioxidant capacity in low-birth-weight infants. Study design: Seventeen infants were fed a conventional formula for low birth-weight infants (F), and 17 a formula containing n - 6 and n -3 LCP from purified pig-brain phospholipids (LCP-F). Fourteen infants receiving human milk from a human milk bank were used as a reference (HM). Growth index were measured and blood samples were taken at entry and after 15 days and 30 days of feeding. Results: In infants fed LCP-F the levels of 22:6n - 3 in total plasma lipids and in plasma phospholipids and triglycerides were higher than in infants fed F and closer to the levels of HM group throughout the study. Docosahexaenoic acid concentration in total plasma lipids was 3.46 +/- 0.19 mg/dl in infants fed LCP-F and 2.08 +/- 0.20 in infants fed F after 15 days of feeding (P < 0.001), and 3.83 +/- 0.30 and 2.15 +/- 0.20 in infants fed LCP-F and F respectively, after 30 days of feeding (P < 0.001). The concentration of 20:4n - 6 in the LCP-F was significantly higher than in the F group at 15 and 30 days of feeding. Plasma antioxidant capacity did not differ significantly between the study groups. Conclusion: Feeding low birth-weight infants a formula containing LCP phospholipids results in an increase of n - 3 and n - 6 LCP in plasma towards that of infants fed human milk. (C) 2000 Harcourt Publishers Ltd. C1 Abbott Labs, Dept Res & Dev, Granada 18004, Spain. Clin Porto Alegre Hosp, Porto Alegre, RS, Brazil. Univ Granada, Dept Biochem & Mol Biol, E-18071 Granada, Spain. RP Ramirez, M, Abbott Labs, Dept Res & Dev, Camino Purchil 68, Granada 18004, Spain. NR 45 TC 9 PU CHURCHILL LIVINGSTONE PI EDINBURGH PA JOURNAL PRODUCTION DEPT, ROBERT STEVENSON HOUSE, 1-3 BAXTERS PLACE, LEITH WALK, EDINBURGH EH1 3AF, MIDLOTHIAN, SCOTLAND SN 0261-5614 J9 CLIN NUTR JI Clin. Nutr. PD FEB PY 2001 VL 20 IS 1 BP 69 EP 76 DI 10.1054/clnu.2000.0163 PG 8 SC Nutrition & Dietetics GA 401FD UT ISI:000166915900012 ER PT J AU Cazalis, R Pagano, E Gorge, JL Chueca, A TI Cloning and molecular features of cytosolic fructose-1,6-bisphosphatase from pea SO AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY LA English DT Article DE cloning; cytosol; fructose-1,6-bisphosphatase; pea; sequencing ID CHLOROPLAST FRUCTOSE-1,6-BISPHOSPHATASE; RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE; SPINACH LEAVES; CDNA; PURIFICATION; EXPRESSION; ENZYME; MODULATION; REDUCTION; SEQUENCE AB A cDNA clone encoding for pea (Pisum sativum L.) cytosolic fructose-1,6-bisphosphatase (E.C. 3.1.3.11) has been isolated by reverse transcription-polymerase chain reaction of the total mRNA. The sequence analysis displayed a 341-amino acid protein of about 37 300 Da molecular mass, corresponding to the subunit of this homotetrameric enzyme; it showed about 80% homology with the other ten higher plant cytosolic FBPases sequenced so far. The enzyme displayed a strong transcriptional expression in green organs (sessile and petioled leaves, stem, pod and grain), and poor expression in root and senescent basal leaves. It is noteworthy the high FBPase transcriptional expression in pod, which displays up to 4-fold higher content of FBPase-specific mRNA than that of root. The mRNA related to cytosolic FBPase was detected after 24 h continuous illumination of 24-h-dark-grown seedlings; this light-induced transcriptional expression is slower than that of chloroplast FBPase, which appears soon after 2 h light. In both cases the corresponding mRNAs disappeared when the light was turned off. The translational expression was also manifested, both as FBPase protein and activity, after 24 h illumination. This delay in the expression of cytosolic FBPase with respect to that of the plastidic enzyme can be interpreted as an indirect effect induced by a metabolite of the photosynthetic carbon pathway, rather than a direct effect of light on the DNA-expression mechanism. Pea cytosolic FBPase was not activated by dithiothreitol, with or without coupling to thioredoxins f or m. The enzyme showed a half-life of 6 h. C1 CSIC, Dept Plant Biochem, Estac Expt Zaidin, E-18008 Granada, Spain. ESAP, F-31076 Toulouse, France. Univ Buenos Aires, Fac Agron, RA-1417 Buenos Aires, DF, Argentina. RP Chueca, A, CSIC, Dept Plant Biochem, Estac Expt Zaidin, Prof Albareda 1, E-18008 Granada, Spain. NR 41 TC 2 PU C S I R O PUBLISHING PI COLLINGWOOD PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA SN 0310-7841 J9 AUST J PLANT PHYSIOL JI Aust. J. Plant Physiol. PY 2001 VL 28 IS 2 BP 157 EP 163 DI 10.1071/PP00041 PG 7 SC Plant Sciences GA 401FZ UT ISI:000166918700008 ER PT J AU Lopez, S Maza, J Masegosa, J Marquez, I TI Slit spectroscopy of nine new z > 3 southern QSOs: Damped Ly alpha and Lyman-limit systems SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE cosmology : observations; quasars : individual : CTQ 247, CTQ298, CTQ 314, CTQ 325, CTQ 408, CTQ 460, CTQ 476, CTQ 1005, CTQ 1061; quasars : general; absorption lines ID CALAN-TOLOLO SURVEY; QUASARS AB We present FWHM = 5 to 8 Angstrom optical spectra of nine previously unknown quasars (QSOs) drawn from the Calan/Tololo Survey. We have chosen this sample based on QSO redshift, z > 3, and the presence of either candidate damped Ly alpha (DLA) or Lyman-limit (LL) systems in their. spectra. The spectra show at least 9 DLA systems at redshifts: 2.25 < z < 3.26, which are identified by the shape and strength of the HI-Ly alpha absorption line, by the presence of Ly beta and low-ionization metal lines at the same redshift, and in most cases: by the observed Lyman-break. We thus provide the astronomical community with new interesting: targets for high resolution spectroscopy oil large telescopes. We describe all the spectra with emphasis on the most outstanding DLA and LL systems: found. C1 Univ Chile, Dept Astron, Santiago, Chile. Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Lopez, S, Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile. NR 10 TC 9 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 2001 VL 366 IS 2 BP 387 EP 394 PG 8 SC Astronomy & Astrophysics GA 404XH UT ISI:000167127200006 ER PT J AU Barros, FC Victora, CG Vaughan, JP Tomasi, E Horta, BL Cesar, JA Menezes, AMB Halpern, R Post, CL Garcia, MD TI The epidemiological transition in maternal and child health in a Brazilian city, 1982-93: a comparison of two population-based cohorts SO PAEDIATRIC AND PERINATAL EPIDEMIOLOGY LA English DT Article ID GESTATIONAL-AGE; BIRTH AB Two studies carried out in 1982 and 1993 in the city of Pelotas, Southern Brazil, provide a unique opportunity for assessing the impact on maternal and child health of the economic and health care changes, which took place in Brazil in this period. The cohorts of mothers and infants of 1982 and 1993 were studied from the time of delivery. In both years, all mothers identified in the city's maternity hospitals answered a standardised questionnaire and their infants were examined. Over 99% of all children born in the city in each of the 2 years were included in the cohorts. Deaths occurring among these children were monitored prospectively, as well as all hospital admissions in the 1993 cohort. In the 1982 study, attempts were made to locate a 25% sample of the children at the mean age of 12 months using the addresses collected at the hospital (82% of the children were located), and all of the cohort children at the mean age of 20 months and 42 months, through a city census (87% were located in both follow-ups). In the 1993 study, 20% of all children plus all low birthweight infants were sought at 12 months of age, using the addresses collected at the hospital, and 95% were successfully traced. There was a 12% fall in the number of births occurring in 1993 (5304 births), in comparison with 1982 (6011 births), in spite of the increase in the population of reproductive age in the city during the decade. There was a marked difference in maternal height and weight at the beginning of pregnancy, with women giving birth in 1993 being, on average, 3.4 cm taller and 2.5 kg heavier than those who gave birth in 1982. The proportion of preterm babies (<37 weeks), measured by the date of last menstrual period, increased from 5.6% in 1982 to 7.5% in 1993. The median duration of breast feeding increased from 3.1 months in 1982 to 4.0 months in 1993. At 12 months of age, the prevalence of deficit of weight for age decreased from 5.4% in 1982 to 3.7% in 1993. The prevalence of deficit of height for age, however, increased from 5.3% to 6.1%. The perinatal mortality rate dropped 31%, from 32.2 per 1000 births in 1982 to 22.1 deaths per 1000 births in 1993. There was also a marked reduction in the infant mortality rate, from 36.4 per 1000 livebirths in 1982 to 21.1 per 1000 livebirths in 1993. The findings of the study indicate that there were improvements in the decade for most of the indicators evaluated, with the exception of birthweight and gestational age. It appears that improvements in perinatal and infant mortality rates are largely due to improvements in the health care sector. C1 PAHO WHO, Latin Amer Ctr Perinatol & Human Dev, Montevideo 11000, Uruguay. Escuela Andaluza Salud Publ, Granada, Spain. London Sch Hyg & Trop Med, London, England. RP Barros, FC, PAHO WHO, Latin Amer Ctr Perinatol & Human Dev, Casilla Correo 627, Montevideo 11000, Uruguay. NR 24 TC 17 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0269-5022 J9 PAEDIATR PERINAT EPIDEMIOL JI Paediatr. Perinat. Epidemiol. PD JAN PY 2001 VL 15 IS 1 BP 4 EP 11 PG 8 SC Public, Environmental & Occupational Health; Obstetrics & Gynecology; Pediatrics GA 406VM UT ISI:000167236900002 ER PT J AU Baez, ME Rodriguez, M Vilches, P Romero, E TI Adsorption of methabenzthiazuron on six allophanic and nonallophanic soils: Effect of organic matter amendment SO JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES LA English DT Article DE methabenzthiazuron; adsorption; organic matter; soil ID RESIDUES; DESORPTION; SORPTION AB This article reports on methabenzthiazuron [1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea] (MBT) adsorption process on six agricultural allophanic and nonallophanic soils. The effect of amendment with exogenous organic matter was also studied. Adsorption kinetic fits an hyperbolic model. MBT adsorption reached an apparent equilibrium within 2 h and followed a second-order reaction. The maximum adsorbed amounts for natural soils ranged from 32 to 145 mug g(-1). Rate constants were considered relatively low (0.27-1.5 x 10(-4) [mug g(-1)](1-n) (s-1)); the slow process was attributed to a combined effect of diffussion and adsorption. MBT adsorption fits the Freundlich model with r values greater than or equal to0.998 at P less than or equal to 0.001 significance levels. K-f and Freundlich exponents (1/n) ranged from 5.3 to 82.1 cm(3) g(-1) and from 0.66 to 0.73, respectively. K-f values for soils with a low organic matter content were lower than that obtained from the only typical allophanic soil derived from volcanic ash under study. Lineal regression analysis between K-f and organic matter content of nonallophanic soils gave a correlation coefficient of 0.980 (P = 0.02). Dispersion of K-d values together with close values of K-OM indicate that organic matter (OM) was the principal component responsible for MBT adsorption in unamended soils. Addition of peat decreased soil pH and increased adsorption capacity for allophanic and nonallophanic soils. Kinetic experiments showed enhancements of X-max values and lower rate constants. C1 Univ Chile, Fac Chem & Pharmaceut Sci, Dept Inorgan & Analyt Chem, Santiago, Chile. CSIC, Estac Expt Zaidin, Granada, Spain. RP Baez, ME, Univ Chile, Fac Chem & Pharmaceut Sci, Dept Inorgan & Analyt Chem, Casilla 233, Santiago, Chile. NR 22 TC 4 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 USA SN 0360-1234 J9 J ENVIRON SCI HEALTH B-PESTIC JI J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes PY 2001 VL 36 IS 1 BP 95 EP 105 PG 11 SC Environmental Sciences; Public, Environmental & Occupational Health GA 409FT UT ISI:000167374400009 ER PT J AU Beltran, MT Estalella, R Anglada, G Rodriguez, LF Torrelles, JM TI Radio spectral indices of the powering sources of outflows SO ASTRONOMICAL JOURNAL LA English DT Article DE ISM : jets and outflows; radio continuum; stars : formation ID YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; FREE-FREE RADIATION; IRAS SOURCES; CONTINUUM EMISSION; AMMONIA OBSERVATIONS; MOLECULAR OUTFLOWS; RHO-OPHIUCHI; WATER MASERS; PV-CEPHEI AB Eight regions containing molecular or HH outflows (Mon R2E, S287, L1654, L483, PV Cephei, L1203, L1251A, and CB 247) have been observed with the VLA at 6 cm, and a total of 55 sources have been detected above a 5 sigma level. By combining our observations at 6 cm with previous data obtained at 3.6 cm, we estimate the spectral indices of the sources in the fields. For 32 of the sources we discriminate the sign of the spectral index and thus, we obtain information about the nature of the emission. For seven outflows (Mon R2E, S287-B, L1654, L483, PV Cephei, L1203, and L1251A) we found at least a central source with an spectral index consistent with thermal free-free emission from thermal radio jets. Multiple sources, separated similar to 10 ", are found near the center of the Mon R2E, S287-B, L1654, and L1251A outflows. In the case of S287-B we found two sources that are valid candidates to drive the S287-B molecular outflow and could be related to the outflow excitation. Under the assumption that the observed emission arises from thermal radio jets, we discuss the mechanism responsible for the ionization and the constraints that introduces on their physical parameters, and we estimate that the flow of ionized material has to originate at a few AU from the exciting star. Most of the remaining, noncentral, sources are characterized by negative spectral indices (alpha < -0.1) and are probably nonthermal background objects unrelated to the studied star-forming regions. C1 Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. RP Beltran, MT, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. NR 59 TC 20 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 2001 VL 121 IS 3 BP 1556 EP 1568 PG 13 SC Astronomy & Astrophysics GA 412YL UT ISI:000167582800028 ER PT J AU Miranda, LF Torrelles, JM Guerrero, MA Vazquez, R Gomez, Y TI Morphological and kinematic signatures of a binary central star in the planetary nebula Hu 2-1 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : mass-loss; ISM : jets and outflows; ISM : kinematics and dynamics; planetary nebulae : individual : Hu 2-1 ID BIPOLAR PREPLANETARY NEBULAE; POINT-SYMMETRICAL NEBULAE; ACCRETION DISKS; WIDE BINARIES; HM-SAGITTAE; DUSTY WINDS; JETS; RESOLUTION; HYDRODYNAMICS; SYSTEMS AB We present H alpha, [N II] and [O III] ground-based and HST archive images, VLA-A 3.6-cm continuum and H92 alpha emission-line data and high-resolution long-slit [N II] spectra of the planetary nebula Hu 2-1. A large number of structural components are identified in the nebula: an outer bipolar and an inner shell, two pairs of collimated bipolar structures at different directions, monopolar bow-shock-like structures, and an extended equatorial structure within a halo. The formation of Hu 2-1 appears to be dominated by anisotropic mass ejection during the late-AGB stage of the progenitor and by variable, 'precessing' collimated bipolar outflows during the protoplanetary nebula and/or early planetary nebula phases. Different observational results strongly support the existence of a binary central star in Hu 2-1, among them (1) the observed point-symmetry of the bipolar lobes and inner shell, and the departures from axial symmetry of the bipolar lobes, (2) the off-centre position of the central star, (3) the detection of mass ejection towards the equatorial plane, and (4) the presence of 'precessing' collimated outflows. In addition, (5) an analysis of the kinematics shows that the systemic velocity of the bipolar outflows does not coincide with the systemic velocity of the bipolar shell. We propose that this velocity difference is a direct evidence of orbital motion of the ejection source in a binary system. From a deduced orbital velocity of similar to 10 km s(-1), a semimajor axis of similar to9-27 au and period of similar to 25-80 yr are obtained, assuming a reasonable range of masses. These parameters are used to analyse the formation of Hu 2-1 within current scenarios of planetary nebulae with binary central stars. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. UNAM, Inst Astron, Ensenada 22800, Baja California, Mexico. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. RP Miranda, LF, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004, E-18080 Granada, Spain. NR 39 TC 17 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAR PY 2001 VL 321 IS 3 BP 487 EP 496 PG 10 SC Astronomy & Astrophysics GA 413UE UT ISI:000167629600011 ER PT J AU Alfaro, EJ Perez, E Delgado, RMG Martos, MA Franco, J TI Detection of a corrugated velocity pattern in the spiral galaxy NGC 5427 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : individual (NGC 5427); galaxies : kinematics and dynamics; galaxies : spiral; galaxies : structure ID STAR-FORMATION; GALACTIC DISK; DISTRIBUTIONS; POPULATION; DENSITY; CLOUDS; SHOCK; ARMS AB Here we report the detection, in H alpha emission, of a radial corrugation in the velocity field of the spiral galaxy NGC 5427. The central velocity of the H alpha line displays coherent, wavy-like variations in the vicinity of the spiral arms. The spectra along three different arm segments show that the maximum amplitude of the sinusoidal line variations are displaced some 500 pc from the central part of the spiral arms. The peak blueshifted velocities appear some 500 pc upstream of the arm, whereas the peak red-shifted velocities are located some 500 pc downstream of the arm. This kinematical behavior is similar to the one expected in a galactic bore generated by the interaction of a spiral density wave with a thick gaseous disk, as recently modeled by Martos & Cox. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Alfaro, EJ, CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain. NR 43 TC 6 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 2001 VL 550 IS 1 PN Part 1 BP 253 EP 260 PG 8 SC Astronomy & Astrophysics GA 417YN UT ISI:000167863200023 ER PT J AU Capitan-Vallvey, LF Duque, O Miron-Garcia, G Checa-Moreno, R TI Determination of protein content using a solid phase spectrophotometric procedure SO ANALYTICA CHIMICA ACTA LA English DT Article DE protein determination; lowry procedure; glass paper; solid phase procedure AB We used a conditioned fiberglass paper to perform the reaction and to retain the reaction products of the Lowry method for protein content. The analytical parameter was obtained by measuring directly the absorbance of the support. Different influencing chemical, support related and instrumental variables were studied and optimized. The usual asymptotic behavior of the analytical function response was improved here by linearizing using a quadratic function. Using 10 mul of sample, the applicable concentration range was between 25 and 200 mg l(-1), with a detection limit of 17 mg l(-1) and a R,S.D. around 5%. The method was applied to the determination of protein in eggwhite samples coming from different birds. The method proposed here for protein content shows higher sensitivity than solution methods, less dependence on protein nature and higher stability of the species fixed on the support. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Granada, Dept Analyt Chem, E-18071 Granada, Spain. Univ La Habana, IMRE, Havana, Cuba. Minist Agr Fisheries & Food, Lab Nacl Sanidad & Prod Anim, Granada 18320, Spain. RP Capitan-Vallvey, LF, Univ Granada, Dept Analyt Chem, E-18071 Granada, Spain. NR 7 TC 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD APR 4 PY 2001 VL 433 IS 1 BP 155 EP 163 PG 9 SC Chemistry, Analytical GA 421HL UT ISI:000168058900016 ER PT J AU Gil, LT Rosello, AM Torres, AC Moreno, RL Orihuela, JAF TI Modulation of soluble phases of endothelial/leukocyte adhesion molecule 1, intercellular adhesion molecule 1, and vascular cell adhesion molecule 1 with interleukin-1 beta after experimental endotoxic challenge SO CRITICAL CARE MEDICINE LA English DT Article DE endotoxic shock; systemic inflammatory response syndrome; multiple organ dysfunction syndrome; E-selectin blood; intercellular adhesion molecule-1 blood; vascular cell adhesion molecule-1 blood; cytometry; enzyme-linked immunosarbent assay ID INFLAMMATORY RESPONSE SYNDROME; SYSTEM ORGAN FAILURE; SEPTIC SHOCK; INFECTION; ICAM-1; SEPSIS; MICE; CYTOKINES; RELEASE; IBUPROFEN AB Objective: To evaluate the effect of treatment with interleukin 1 beta (IL-1 beta) on the concentrations of soluble adhesion molecules after an endotoxic challenge, Design:Randomized, controlled study. Setting: Experimental Unit, Virgen de las Nieves University Hospital. Subjects: Seventy-two female CBA/H mice of 20 to 21 g, supplied by the animal center of the Experimental Unit. Intervention: The mice were randomized into three groups of 24, Group 1 (sham) received two intraperitoneal tip) doses of 0.1 mt of phosphate-buffered saline; group 2 (lipopolysaccharide) was injected with 125 mg/kg lipopolysaccharide (Escherichia coil) tip) 24 hrs after 0.1 mt of phosphate-buffered saline; group 3 was pretreated with 80 ng tip) of IL-1 beta per mouse 24 hrs before the endotoxic challenge. Measurements and Main Results:At 1, 2, 4, and 24 hrs after the endotoxic challenge, the concentrations of soluble endothelial/leukocyte adhesion molecule 1 (ELAM-1), intercellular adhesion molecule 1 (ICAM-1), and vascular cell adhesion molecule 1 (VCAM-1) were measured in the three groups. There was a significant increase (p < .01) in these concentrations at these times in comparison with the sham group, The use of IL-1 produced a significant decrease (p < .05) in the three molecules among the treated group versus the group submitted only to the challenge; concentrations of ELAM-1 significantly decreased to below those of the sham group, and those of VCAM-1 reduced to levels that did not significantly differ from those of the sham group. Conclusion: Endotoxin administration significantly increases the concentrations of soluble ELAM-1, ICAM-1, and VCAM-1 in mice, Treatment with IL-1 significantly decreases these concentrations, probably attenuating cell injury and organ dysfunction. C1 Univ Los Andes, Sch Med, Dept Microbiol, Merida, Venezuela. Virgen de las Nieves Univ Hosp, Expt Surg Unit, Granada, Spain. Virgen de las Nieves Univ Hosp, Dept Gen & Digest Surg, Granada, Spain. RP Gil, LT, Hosp Univ Virgen de las Nieves, Ctr Licinio Fuente Sotano, Unidad Cirugia Expt, Avenida de las Fuerzas Armadas 2, Granada 18014, Spain. NR 39 TC 8 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD APR PY 2001 VL 29 IS 4 BP 776 EP 781 PG 6 SC Critical Care Medicine GA 421KN UT ISI:000168063700012 ER PT J AU Castro-Tirado, AJ Sokolov, VV Gorosabel, J Ceron, JMC Greiner, J Wijers, RAMJ Jensen, BL Hjorth, J Toft, S Pedersen, H Palazzi, E Pian, E Masetti, N Sagar, RN Mohan, V Pandey, AK Pandey, SB Dodonov, SN Fatkhullin, TA Afanasiev, VL Komarova, VN Moiseev, AV Hudec, R Simon, V Vreeswijk, P Rol, E Klose, S Stecklum, B Zapatero-Osorio, MR Caon, N Blake, C Wall, J Heinlein, D Henden, A Benetti, S Magazzu, A Ghinassi, F Tommasi, L Bremer, M Kouveliotou, C Guziy, S Shlyapnikov, A Hopp, U Feulner, G Dreizler, S Hartmann, D Boehnhardt, H Paredes, JM Marti, J Xanthopoulos, E Kristen, HE Smoker, J Hurley, K TI The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : general; cosmology : observations ID GAMMA-RAY BURSTS; 28 FEBRUARY 1997; LIGHT CURVES; FIREBALL MODEL; ERROR BOX; PHOTOMETRY; GRB-990123; SUPERNOVA; DISCOVERY; EMISSION AB Broad-band optical observations of the extraordinarily bright optical afterglow of the intense gamma-rag burst GRB 991208 started similar to2.1 days after the event and continued until 4 Apr. 2000. The flux decay constant of the optic al afterglow in the R-band is -2.30 +/- 0.07 up to similar to5 days. which is very likely due to the jet effect. and it is followed by a much steeper decay with constant -3.2 +/- 0.2. the fastest one ever seen in a GRB optical afterglow. A negative detection in several all-sky films taken simultaneously with the er ent. that otherwise would have reached naked eye brightness, implies either a previous additional break prior to similar to2 days after the occurrence of the GRB (as expected from the jet effect) or a maximum, as observed in GRB 970508. The existence of a second break might indicate a steepening in the electron spectrum or the superposition of two events, resembling GRB 000301C. Once the afterglow emission vanished, contribution of a bright underlying supernova was found on the basis of the late-time R-band measurements. but the light curve is not sufficiently well sampled to rule out a dust echo explanation. Our redshift determination of z = 0.706 indicates that GRB 991208 is at 3.7 Gpc (for H-0 = 60 km s(-1) Mpc(-1), Omega (0) = 1 and Lambda (0) = 0), implying an isotropic energy release of 1.15 10(53) erg which may. be relaxed by beaming by a factor >10(2). Precise astrometry indicates that the GRB coincides within 0.2" with the host galaxy, thus supporting a massive star origin. The absolute magnitude of the galaxy is M-B = -18.2, well below the knee of the galaxy luminosity function and we derive a star-forming rate of (11.5 +/- 7.1) M-circle dot yr(-1), which is much larger than the present-day rate in our Galaxy. The quasi simultaneous broad-band photometric spectral energy distribution of the afterglow was determined similar to3.5 day after the burst (Dec. 12.0) implying a cooling frequency ve below the optical band, i.e. supporting a jet model with p = -2.30 as the index of the power-law electron distribution. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Nacl Invest Agr, LAEFF, E-28080 Madrid, Spain. Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Russia. Danish Space Res Inst, Copenhagen, Denmark. Real Inst, Cadiz 11110, Spain. Observ Armada, Secc Astron, Cadiz 11110, Spain. Inst Astrophys, Potsdam, Germany. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Univ Copenhagen, Astron Observ, Copenhagen, Denmark. CNR, Ist Tecnol & Studio Radiaz Extraterr, I-40126 Bologna, Italy. Uttar Pradesh State Observ, Naini Tal 263129, India. Acad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech Republic. Anton Pannekoehk Inst, Amsterdam, Netherlands. Thuringer Landessternwarte, D-07778 Tautenburg, Germany. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. Univ Oxford, Oxford AX1 4AU, England. Deutsch Zentrum Luft & Raumfahrt, D-86156 Augsburg, Germany. USN Observ, Flagstaff Stn, AZ USA. Univ Space Res Assoc, Flagstaff Stn, AZ USA. Ctr Galileo Galilei, Canary Isl, Spain. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Inst Radio Astron Millimetr, Grenoble, France. NASA, George C Marshall Space Flight Ctr, Univ Space Res Assoc, Huntsville, AL 35812 USA. Nikolaev Univ Observ, UA-327030 Nikolayev, Ukraine. Univ Sternwarte, Munich, Germany. Univ Tubingen, Tubingen, Germany. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. European So Observ, Santiago 19, Chile. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. Univ Jaen, Escuela Politecn Super, Dept Fis, Jaen, Spain. Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England. Harvard Univ, Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. RP Castro-Tirado, AJ, CSIC, Inst Astrofis Andalucia, POB 03004, E-18080 Granada, Spain. NR 83 TC 49 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2001 VL 370 IS 2 BP 398 EP 406 PG 9 SC Astronomy & Astrophysics GA 431BE UT ISI:000168611400008 ER PT J AU Moitinho, A TI Open clusters in the third galactic quadrant I. Photometry SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE techniques : photometric; stars : fundamental parameters; Galaxy : open clusters and associations : general; Galaxy : structure; ISM : dust extinction ID UBV(RI)(C) PHOTOMETRY; CELESTIAL EQUATOR; STANDARD STARS; SPECTROSCOPY; EXTINCTION AB We have performed a photometric survey of open clusters in the third Galactic quadrant in order to study the star formation history and spatial structure in the Canis Major-Puppis-Vela region. In this paper we describe a catalogue of CCD UBVRI photometry of approximately 65 000 stars in the fields of 30 open clusters. The data were obtained and reduced using the same telescope, the same reduction procedures, and the same standard photometric system, which makes this catalogue the largest homogeneous source of open cluster photometry so far. In subsequent papers of this series, colour-colour and colour-magnitude diagrams will be presented which, amongst other uses, will allow the determination of an homogeneous set of cluster reddenings, distances, and ages that will constitute the observational basis for our studies of the spatial structure and star formation history in the third Galactic quadrant. C1 UNAM, Observ Astron Nacl, Ensenada, Baja California, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Moitinho, A, UNAM, Observ Astron Nacl, Apdo Postal 877,CP 22800, Ensenada, Baja California, Mexico. NR 55 TC 24 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2001 VL 370 IS 2 BP 436 EP 446 PG 11 SC Astronomy & Astrophysics GA 431BE UT ISI:000168611400012 ER PT J AU Thomas, MC Longobardo, MV Carmelo, E Maranon, C Planelles, L Patarroyo, ME Alonso, C Lopez, MC TI Mapping of the antigenic determinants of the T-cruzi kinetoplastid membrane protein-11. Identification of a linear epitope specifically recognized by human Chagasic sera SO CLINICAL AND EXPERIMENTAL IMMUNOLOGY LA English DT Article DE KMP11; antigenic determinants; Trypanosoma cruzi; Leishmania; Chagas disease ID LEISHMANIA-DONOVANI; TRYPANOSOMA-CRUZI; MOLECULAR CHARACTERIZATION; RECOMBINANT ANTIGENS; AFRICAN TRYPANOSOMES; DISEASE; CLONING; LIPOPHOSPHOGLYCAN; EXPRESSION; DIAGNOSIS AB The high variability among strains and isolates of Trypanosoma cruzi and the existence of shared antigenic determinants with other pathogens, particularly with members of the Leishmania genus make difficult the specific diagnosis of Chagas' disease. The data reported in this paper show that the T. cruzi KMP11 protein is an immunodominant antigen highly recognized by the sera from chagasic and leishmaniasis patients. By the use of amino- and carboxyl-terminal truncated KMP11 recombinant proteins and synthetic peptides, evidence is provided that while the sera from chagasic patients recognize linear peptides the sera from patients with visceral leishmaniasis must be predominantly directed against conformational epitopes. We found that a particular linear determinant, located in the carboxyl-terminal region of the protein, is recognized with high specificity and sensitivity only by sera from Chagas' disease patients, suggesting it could be a good candidate for differential serodiagnosis of Chagas' disease. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Dept Mol Biol, Granada, Spain. Univ Nacl Colombia, Inst Inmunol, Bogota, Colombia. UAM, CSIC, Ctr Biol Mol Severo Ochoa, Madrid, Spain. RP Lopez, MC, CSIC, Inst Parasitol & Biomed Lopez Neyra, Dept Mol Biol, Ventanilla 11, Granada, Spain. NR 24 TC 12 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0009-9104 J9 CLIN EXP IMMUNOL JI Clin. Exp. Immunol. PD MAR PY 2001 VL 123 IS 3 BP 465 EP 471 PG 7 SC Immunology GA 431YX UT ISI:000168660300018 ER PT J AU Torrelles, JM Patel, NA Gomez, JF Ho, PTP Rodriguez, LF Anglada, G Garay, G Greenhill, L Curiel, S Canto, J TI Spherical episodic ejection of material from a young star SO NATURE LA English DT Article ID THERMAL RADIO JET; CEPHEUS-A HW2; WATER MASERS; MASS OUTFLOW; H2O MASERS; REGIONS; MOTION AB The exact processes by which interstellar matter condenses to form young stars are of great interest, in part because they bear on the formation of planets like our own from the material that fails to become part of the star. Theoretical models suggest that ejection of gas during early phases of stellar evolution is a key mechanism for removing excess angular momentum, thereby allowing material to drift inwards towards the star through an accretion disk(1,2). Such ejections also limit the mass that can be accumulated by the stellar core(1,2). To date, these ejections have been observed to be bipolar and highly collimated, in agreement with theory. Here we report observations at very high angular resolution of the proper motions of an arc of water-vapour masers near a very young, massive star in Cepheus. We rnd that the arc of masers can be fitted to a circle with an accuracy of one part in a thousand, and that the structure is expanding. Only a sphere will always produce a circle in projection, so our observations strongly suggest that the perfectly spherical ejection of material from this star took place about 33 years earlier. The spherical symmetry of the ejecta and its episodic nature are very surprising in the light of present theories. C1 Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, IEEC, ES-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, ES-08034 Barcelona, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 28080, Spain. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Chile, Dept Astron, Santiago, Chile. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Ho, PTP, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. NR 21 TC 35 PU MACMILLAN PUBLISHERS LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAY 17 PY 2001 VL 411 IS 6835 BP 277 EP 280 PG 4 SC Multidisciplinary Sciences GA 432RT UT ISI:000168710000038 ER PT J AU Manning-Cela, R Cortes, A Gonzalez-Rey, E Van Voorhis, WC Swindle, J Gonzalez, A TI LYT1 protein is required for efficient in vitro infection by Trypanosoma cruzi SO INFECTION AND IMMUNITY LA English DT Article ID HOST-CELL INVASION; GENE REPLACEMENTS; LOW PH; EXPRESSION; TRANSFORMATION; EPIMASTIGOTES; AMASTIGOTES; HEMOLYSIN; LYSOSOMES; SECRETION AB Trypanosoma cruzi invasion of host cells involves several discrete steps: attachment, parasite internalization mediated by recruitment and fusion of host cell lysosomes, and escape from the parasitophorous vacuole to liberate amastigotes to multiply freely in the cytosol. This report describes the initial characterization of the LYT1 gene and the demonstration that the gene product is involved in cell lysis and infectivity. Mutational analysis demonstrated that deletion of LYT1 resulted in attenuation of infection, which was associated with diminished hemolytic activity. Reintroduction of LYT1 restored infectivity in null mutants, confirming the critical role of LYT1 in infection. Additionally, in vitro stage transition experiments with LYT1-deficient lines showed that these parasites converted to extracellular amastigote-like cells and metacyclic trypomastigotes more rapidly than wild-type parasites, suggesting that the diminished infectivity was not a result of the LYT1 deficiency that affected the parasite's ability to complete the life cycle. C1 Infect Dis Res Inst, Seattle, WA 98104 USA. Univ Washington, Dept Pathobiol, Seattle, WA 98195 USA. Univ Washington, Dept Med, Seattle, WA 98195 USA. Seattle Biomed Res Inst, Seattle, WA 98109 USA. IPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City, DF, Mexico. CSIC, Inst Parasitol & Biomed, Granada, Spain. RP Swindle, J, Infect Dis Res Inst, 1124 Columbia St,Suite 600, Seattle, WA 98104 USA. NR 21 TC 12 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0019-9567 J9 INFEC IMMUNITY JI Infect. Immun. PD JUN PY 2001 VL 69 IS 6 BP 3916 EP 3923 PG 8 SC Immunology; Infectious Diseases GA 433WU UT ISI:000168784300051 ER PT J AU Rodriguez, LF Torrelles, JM Anglada, G Marti, J TI VLA observations of brightness enhancements moving along the axis of the Cep a HW2 thermal jet SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE ISM : individual (Cep a HW2); ISM : jets and outflows; radio continuum : stars; stars : formation ID CEPHEUS-A; RADIO JET; REGION AB We analyze sensitive, high angular resolution (0."3) Very Large Array observations made at 6-cm of the thermal jet Cep A HW2 in two epochs separated by 1.3 years. The subtraction of the maps made at the two epochs clearly shows the presence of brightness enhancements that travel in the jet at a velocity of 950 +/- 150 km s(-1). We also use these results to estimate an accurate position for the exciting star of this jet. C1 Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Jaen, Dept Fis EPS, E-23071 Jaen, Spain. RP Rodriguez, LF, Univ Nacl Autonoma Mexico, Inst Astron, Campus Morelia,Apartado Postal 3-72, Morelia 58089, Michoacan, Mexico. NR 11 TC 13 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD APR PY 2001 VL 37 IS 1 BP 95 EP 99 PG 5 SC Astronomy & Astrophysics GA 434YG UT ISI:000168843000010 ER PT J AU Varela, N Munoz-Pinedo, C Ruiz-Ruiz, C Robledo, G Pedroso, M Lopez-Rivas, A TI Interferon-gamma sensitizes human myeloid leukemia cells to death receptor-mediated apoptosis by a pleiotropic mechanism SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID TUMOR-NECROSIS-FACTOR; FADD-DEPENDENT APOPTOSIS; SEQUENCE-BINDING-PROTEIN; LIGAND-INDUCED APOPTOSIS; TRAIL-INDUCED APOPTOSIS; INDUCED-PROXIMITY MODEL; ANTI-FAS ANTIBODY; NF-KAPPA-B; CYTOCHROME-C; TNF-ALPHA AB The role of interferon (IFN)-gamma as a sensitizing agent in apoptosis induced by ligation of death receptors has been evaluated in human myeloid leukemia cells. Incubation of U937 cells with IFN-gamma sensitized these cells to apoptosis induced by tumor necrosis factor-alpha, agonistic CD95 antibody, and tumor necrosis factor-related apoptosis-inducing ligand, Other human myeloid leukemic cells were also sensitized by IFN-gamma to death receptor-mediated apoptosis. Treatment of U937 cells with IFN-gamma up-regulated the expression of caspase-8 and potently synergized with death receptor ligation in the processing of caspase-8 and BID cleavage. Concomitantly, a marked down-regulation of BCL-2 protein was also observed in cells incubated with IFN-gamma, Furthermore, the caspase-dependent generation of a 23-kDa fragment of BCL-2 protein, the release of cytochrome c from mitochondria and the activation of caspase-9 were also enhanced upon death receptor ligation in IFN-gamma -treated cells. Ectopically expressed Bcl-2 protein inhibited IFN-gamma -induced sensitization to apoptosis. In summary, these results indicate that IFN-gamma sensitizes human myeloid leukemic cells to a death receptor-induced, mitochondria-mediated pathway of apoptosis. C1 CSIC, Inst Parasitol & Biomed, Granada 18001, Spain. Ctr Nacl Sanidad Agropecuaria, La Habana, Cuba. RP Lopez-Rivas, A, CSIC, Inst Parasitol & Biomed, Calle Ventanilla 11, Granada 18001, Spain. NR 79 TC 33 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAY 25 PY 2001 VL 276 IS 21 BP 17779 EP 17787 PG 9 SC Biochemistry & Molecular Biology GA 435FJ UT ISI:000168866500023 ER PT J AU Velazquez, E Igual, JM Willems, A Willems, A Fernadez, MP Munoz, E Mateos, PF Abril, A Toro, N Normand, P Cervantes, E Gillis, M Martinez-Molina, E TI Mesorhizobium chacoense sp nov., a novel species that nodulates Prosopis alba in the Chaco Arido region (Argentina) SO INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY LA English DT Article DE taxonomy; Mesorhizobium; LMW RNA; 16S rRNA; Prosopis ID WEIGHT RNA PROFILES; CICER-ARIETINUM L; GEN-NOV; STAIRCASE ELECTROPHORESIS; RHIZOBIUM-MEDITERRANEUM; DEOXYRIBONUCLEIC-ACID; DNA FRAGMENTS; BACTERIA; STRAINS; SEQUENCES AB Low-molecular-weight RNA analysis was performed for the identification and classification of 20 Argentinian strains isolated from the root nodules of Prosopis alba, SDS-PAGE of total cellular proteins, determination of the DNA base composition, DNA-DNA reassociation experiments and physiological and biochemical tests were also carried out for these strains and the whole 16S rRNA gene was sequenced from one of the strains, strain LMG 19008(T). Results of the genotypic and phenotypic characterization showed that the strains isolated in this study belong to a group that clustered in the genus Mesorhizobium. The results of DNA-DNA hybridizations showed that this group is a novel species of this genus. The name Mesorhizobium chacoense sp, nov. is proposed for this species. The type strain is LMG 19008(T) (= CECT 5336(T)). C1 Univ Salamanca, Dept Microbiol & Genet, E-37008 Salamanca, Spain. CSIC, IRNA, Salamanca, Spain. Univ Cordoba, Catedra Microbiol Agr, Fac Agron, Cordoba, Argentina. Univ Lyon 1, Lab Ecol Microbienne, URA 697, CNRS, F-69622 Villeurbanne, France. Microbiol Lab, Vakgrp Biochem Fysiol & Microbiol, B-9000 Ghent, Belgium. CSIC, Estac Expt Zaidin, Dept Sistemas, Granada, Spain. RP Velazquez, E, Univ Salamanca, Dept Microbiol & Genet, Edificio Dept,Campus Miguel Unamuno, E-37008 Salamanca, Spain. NR 43 TC 35 PU SOC GENERAL MICROBIOLOGY PI READING PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AE, BERKS, ENGLAND SN 1466-5026 J9 INT J SYST EVOL MICROBIOL JI Int. J. Syst. Evol. Microbiol. PD MAY PY 2001 VL 51 PN Part 3 BP 1011 EP 1021 PG 11 SC Microbiology GA 435UP UT ISI:000168900000036 ER PT J AU Wegener, C Schroder, S Kapp, D Puhler, A Lopez, ES Martinez-Abarca, F Toro, N Del Papa, MF Balague, LJ Lagares, A Martinez-Drets, G Niehaus, K TI Genetic uniformity and symbiotic properties of acid-tolerant alfalfa-nodulating rhizobia isolated from dispersed locations throughout Argentina SO SYMBIOSIS LA English DT Article DE Rhizobium; acid-tolerance; genetical diversity; host range; pathogenicity; symbiotic effectiveness ID PHASEOLUS-VULGARIS L; BROAD-HOST-RANGE; NITROGEN-FIXATION; MEDICAGO-SATIVA; GEL-ELECTROPHORESIS; MELILOTI; BACTERIA; NODULES; SOIL; MUTANTS AB Alfalfa-nodulating rhizobia from acidic soils (pH 5.52-6.2) in Argentina comprise a distinct group of acid-tolerant Rhizobium isolates which were found to be related to Rhizobium sp. strain Or 191 (Del Papa et al., 1999). Lipopolysaccharide profiles and 16S rDNA sequences demonstrated that all twelve acid-tolerant Rhizobium isolates belonged to one species. Furthermore, the group of acid-tolerant Rhizobium isolates was formed by one strain type, since they gave the same plasmid profile as well as the same IS- and ERIC-fingerprints. All acid-tolerant Rhizobium isolates were genetically identical even though they were isolated at very different locations in Argentina. The isolates nodulated a range of Medicago, Melilotus and Trigonella species, and Phaseolus vulgaris, but were weak in nitrogen fixation. M. sativa nodules induced by one of the acid-tolerant rhizobial isolates contained several bacteroids within a vesicle-like structure, in contrast to nodules induced by the reference strain S. meliloti 2011. Reisolation of bacteria from root nodules resulted in approx. 40 times more colony forming bacteria in case of the acid-tolerant strains. These strains mark the borderline between a symbiotic and a parasitic plant-microbe interaction. C1 Univ Bielefeld, Lehrstuhl Genet, D-33501 Bielefeld, Germany. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Natl Univ La Plata, Fac Ciencias Exactas, Inst Bioquim & Biol Mol, RA-1900 La Plata, Argentina. Inst Invest Biol Clemente Estable, Montevideo 11600, Uruguay. RP Niehaus, K, Univ Bielefeld, Lehrstuhl Genet, POB 100131, D-33501 Bielefeld, Germany. NR 43 TC 4 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT 76120, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 2001 VL 30 IS 2-3 BP 141 EP 162 PG 22 SC Microbiology GA 438PX UT ISI:000169063200006 ER PT J AU Fontenla, S Puntieri, J Ocampo, JA TI Mycorrhizal associations in the Patagonian steppe, Argentina SO PLANT AND SOIL LA English DT Article DE exotics; hydrophytes; marsh; mycorrhizas; mycorrhizal status; Patagonia; steppe ID ARBUSCULAR MYCORRHIZAS; FUNGI; CYPERACEAE; INFECTION; FORESTS; PLANTS; ROOTS AB The mycorrhizal status of plant species in north-west Patagonia was examined. Communities representative of Patagonian steppe and marshes were compared with respect to the mycorrhizal status of their species. Most of both native and exotic plant species sampled were arbuscular mycorrhizal (AM). The percentage of species with mycorrhizal association was higher for perennial herbs and shrubs than for annual herbs. The higher ratio of mycorrhizal/nonmycorrhizal (NM) species found for dicotyledons than for monocotyledons, could reflect the presence of a considerable number of NM monocotyledons in the marsh. The mycorrhizal status of plants differed slightly between the steppe and the marsh. In the steppe, native AM species were more frequent than in the marsh. In contrast, in the marsh, the NM species were proportionally more represented than in the steppe. The Juncaceae and Cyperaceae, which include hydrohytic NM plants, accounted for many of these differences. Moreover, the dominant species in the marshes, Juncus arcticus, is a NM species. In the present study, most of species belonging to the same taxonomic family tended to have the same mycorrhizal associations, in agreement with studies on plants from other regions. Exceptions to this general behaviour were observed in the families Cyperaceae, Scrophulariaceae, Berberidaceae and Amaryllidaceae. The most represented families in which mycorrhizal behaviour differed between species of the same family were Asteraceae, Fabaceae and Poaceae. Senecio neaei (Asteraceae) and Boopis australis (Calyceraceae) showed facultative mycorrhizal behaviour. C1 Univ Nacl Comahue, Ctr Reg Univ Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Estac Expt Zaidin, Granada 18008, Spain. RP Fontenla, S, Univ Nacl Comahue, Ctr Reg Univ Bariloche, Quintral 1250, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. NR 65 TC 12 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0032-079X J9 PLANT SOIL JI Plant Soil PD JUN PY 2001 VL 233 IS 1 BP 13 EP 29 PG 17 SC Agronomy; Plant Sciences; Soil Science GA 443GG UT ISI:000169332300002 ER PT J AU Balog, Z Delgado, AJ Moitinho, A Furesz, G Kaszas, G Vinko, J Alfaro, EJ TI Fundamental parameters and new variables of the galactic open cluster NGC 7128 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE techniques : photometric; techniques : spectroscopic; stars : variables : other; open clusters and associations : individual : NGC 7128 ID DIFFUSE INTERSTELLAR BANDS; UVBY-BETA-PHOTOMETRY; MAIN-SEQUENCE STARS; SOUTHERN CLUSTERS; YOUNG; CALIBRATION; MAGNITUDE; CEPHEIDS; SEARCH; RANGE AB CCD photometry in Johnson UBV and Stromgren uvby systems and medium-resolution spectroscopy of the galactic open cluster NGC 7128 are presented. Spectral types of the brightest 12 stars in the cluster field were determined based on equivalent widths of the Hac and the HeI 6678-Angstrom line. The spectroscopic observations also revealed two obvious and one probable Be-type stars showing H alpha emission. The analysis of the photometric diagrams gave a colour excess of E(B - V) = 1.03 +/- 0.06 mag, a distance modulus DM = 13.0 +/- 0.2 mag and an age above 10 Myr. Time-resolved photometric observations obtained on one night resulted in the detection of short time-scale light variations of seven new and three already known variable stars in the cluster field. C1 Univ Szeged, Dept Opt & Quantum Elect, H-6720 Szeged, Hungary. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, Granada, Spain. UNAM, Inst Astron, Ensenada 22800, BC, Mexico. Univ Szeged, Dept Expt Phys, H-6720 Szeged, Hungary. RP Balog, Z, Univ Szeged, Dept Opt & Quantum Elect, Dom Ter 9, H-6720 Szeged, Hungary. NR 49 TC 1 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUN 1 PY 2001 VL 323 IS 4 BP 872 EP 886 PG 15 SC Astronomy & Astrophysics GA 443QN UT ISI:000169352000008 ER PT J AU Hartman, RC Bottcher, M Aldering, G Aller, H Aller, M Backman, DE Balonek, TJ Bertsch, DL Bloom, SD Bock, H Boltwood, P Carini, MT Collmar, W De Francesco, G Ferrara, EC Freudling, W Gear, WK Hall, PB Heidt, J Hughes, P Hunter, SD Jogee, S Johnson, WN Kanbach, G Katajainen, S Kidger, M Kii, T Koskimies, M Kraus, A Kubo, H Kurtanidze, O Lanteri, L Lawson, A Lin, YC Lisenfeld, U Madejski, G Makino, F Maraschi, L Marscher, AP McFarland, JP McHardy, I Miller, HR Nikolashvili, M Nilsson, K Noble, JC Nucciarelli, G Ostorero, L Pian, E Pursimo, T Raiteri, CM Reich, W Rekola, R Richter, GM Robson, EI Sadun, A Savolainen, T Sillanpaa, A Smale, A Sobrito, G Sreekumar, P Stevens, JA Takalo, LO Tavecchio, F Terasranta, H Thompson, DJ Tornikoski, M Tosti, G Ungerechts, H Urry, CM Valtaoja, E Villata, M Wagner, SJ Wehrle, AE Wilson, JW TI Multiepoch multiwavelength spectra and models for blazar 3C 279 SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : observations; quasars : individual (3C 279) ID EXTRAGALACTIC RADIO-SOURCES; RAY ASTRONOMY SATELLITE; MILLIMETER CONTINUUM MEASUREMENTS; ENERGY CONCENTRATOR SPECTROMETER; ACTIVE GALACTIC NUCLEI; BL LACERTAE OBJECTS; 3C 279; GAMMA-RAYS; QUASAR 3C-279; INSTRUMENT DESCRIPTION AB Of the blazars detected by EGRET in GeV gamma -rays, 3C 279 is not only the best observed by EGRET but also one of the best monitored at lower frequencies. We have assembled 11 spectra, from GHz radio through GeV gamma -rays, from the time intervals of EGRET observations. Although some of the data have appeared in previous publications, most are new, including data taken during the high states in early 1999 and early 2000. All of the spectra show substantial gamma -ray contribution to the total luminosity of the object; in a high state, the gamma -ray luminosity dominates over that at all other frequencies by a factor of more than 10. There is no clear pattern of time correlation; different bands do not always rise and fall together, even in the optical, X-ray, and gamma -ray bands. The spectra are modeled using a leptonic jet, with combined synchrotron self-Compton plus external Compton gamma -ray production. Spectral variability of 3C 279 is consistent with variations of the bulk Lorentz factor of the jet, accompanied by changes in the spectral shape of the electron distribution. Our modeling results are consistent with the UV spectrum of 3C 279 being dominated by accretion disk radiation during times of low gamma -ray intensity. C1 NASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771 USA. Rice Univ, Dept Space Phys & Astron, Houston, TX 77005 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA. Franklin & Marshall Coll, Dept Phys & Astron, Lancaster, PA 17604 USA. Colgate Univ, Dept Phys & Astron, Hamilton, NY 13346 USA. Hampden Sydney Coll, Hampden Sydney, VA 23943 USA. Landessternwarte Konigstuhl, D-69117 Heidelberg, Germany. Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42104 USA. Max Planck Inst Extraterr Phys, D-85740 Garching, Germany. Osserv Astron Torino, I-10025 Pino Torinese, Italy. Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA. European So Observ, D-85748 Munich, Germany. Space Telescope European Coordinating Facil, D-85748 Munich, Germany. Cardiff Univ, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, Wales. Pontificia Univ Catolica Chile, Fac Fis, Dept Astron & Astrofis, Santiago 22, Chile. Princeton Univ Observ, Princeton, NJ 08544 USA. CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA. USN, Res Lab, Washington, DC 20375 USA. Tuorla Observ, FIN-21500 Piikkio, Finland. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. Inst Space & Astronaut Sci, Kanagawa 2298510, Japan. Max Planck Inst Radioastron, D-53121 Bonn, Germany. Kyoto Univ, Fac Sci, Dept Phys, Kyoto 6068502, Japan. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England. Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA. Inst Radioastron Millimetr, E-18012 Granada, Spain. Stanford Linear Accelerator Ctr, GLAST Grp, Menlo Pk, CA 94025 USA. Osserv Astron Brera, I-20121 Milan, Italy. Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA. Abastumani Observ, GE-383762 Abastumani, Rep of Georgia. Osservatorio Astron Perugia, I-06123 Perugia, Italy. Astron Observ Trieste, I-34131 Trieste, Italy. Joint Astron Ctr, Hilo, HI 96720 USA. Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England. Univ Colorado, Dept Phys, Denver, CO 80217 USA. NASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771 USA. Indian Space Res Org, Satellite Ctr, Control & Mission Area, Bangalore 560017, Karnataka, India. UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England. Helsinki Univ Technol, Metsahovi Radio Observ, Kylmala 02540, Finland. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Turku, Dept Phys, SF-20500 Turku, Finland. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. RP Hartman, RC, NASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Code 661, Greenbelt, MD 20771 USA. EM rch@egret.gsfc.nasa.gov NR 79 TC 42 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 8 PY 2001 VL 553 IS 2 PN Part 1 BP 683 EP 694 PG 12 SC Astronomy & Astrophysics GA 444YX UT ISI:000169429100019 ER PT J AU Sokolov, VV Fatkhullin, TA Castro-Tirado, AJ Fruchter, AS Komarova, VN Kasimova, ER Dodonov, SN Afanasiev, VL Moiseev, AV TI Host galaxies of gamma-ray bursts: Spectral energy distributions and internal extinction SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : starburst; galaxies : photometry; cosmology : observations; gamma rays : bursts; ISM : dust, extintion ID STAR-FORMATION; FIELD GALAXIES; ULTRAVIOLET; SUPERNOVAE; GRB-970508; REDSHIFT; HISTORY AB We present BVRcIc broad-band flux spectra for the host galaxies of GRB 970508, GRB 980613, GRB 980703, GRB 990123 and GRB 991208 obtained with the 6-m telescope of SAO RAS. The comparison of the broad-band flux spectra of these host galaxies with the template spectral energy distributions (SEDs) of local starburst galaxies of different morphological types shows that the BVRcIc of the hosts are best fitted by the spectral properties of template SEDs of starburst galaxies and that there is a significant internal extinction in these host galaxies. We derived the absolute magnitudes of the GRB host galaxies making use of SEDs for the starburst galaxies. To create theoretical templates we performed the population synthesis modeling of the continuum spectral energy distribution of the host galaxies of GRB 970508 and GRB 980703 using different extinction laws (Cardelli et al. 1989 and Calzetti et al. 2000) and assuming burst and exponential scenarios of star formation. The comparison of BVRcIc broad-band flux spectra with the local starburst galaxies templates and theoretical templates as well as direct estimates (using Balmer emission lines) of the internal extinction shows that it is likely to be of great importance to take into account effects of the internal extinction in the host galaxies. From the energy distribution in the spectrum of the host galaxy of GRB 991208 and from the intensity of their spectral lines (with allowance for the effects of internal extinction) it follows that this is a GRB galaxy with the highest massive star-formation rate of all known GRB galaxies - up to hundreds of solar masses per year. The reduced luminosity of these dusty galaxies (e.g. for the host of GRB 970508 A(V) similar to 2 mag, for the host of GRB 980703 A(V) similar to 0.6 mag and for the host of GRB 991208 A(V) similar to 2 mag) could explain the observational fact (it results independently from our BVRcIc photometry and from calculated spectral distribution for the subset of galaxies having been observed with the 6-m telescope): none of the observed GRB host galaxies with known distances is brighter than the local galaxies with the luminosity L-* (where L-* is the "knee" of the local luminosity function). C1 RAS, Special Astrophys Observ, Nizhni Arkhyz 369167, Russia. CSIC, Inst Astrofis Andalucia, Granada, Spain. INTA, LAEFF, Madrid 28080, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Rostov State Univ, Inst Phys, Rostov On Don 344090, Russia. Isaac Newton Inst Chile, SAO Branch, Santiago, Chile. RP Sokolov, VV, RAS, Special Astrophys Observ, Karachai Cherkessia, Nizhni Arkhyz 369167, Russia. NR 58 TC 50 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2001 VL 372 IS 2 BP 438 EP 455 DI 10.1051/0004-6361:20010512 PG 18 SC Astronomy & Astrophysics GA 454GB UT ISI:000169963800013 ER PT J AU Fracchia, S Menendez, A Godeas, A Ocampo, JA TI A method to obtain monosporic cultures of arbuscular mycorrhizal fungi SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article DE arbuscular mycorrhizas; Gigaspora; Glomus; monosporic culture ID ROOTS; INFECTION AB We describe here a simple technique for obtaining monosporic cultures of PIM fungi. Gigaspora rosea, Gi. sp., Glomus mosseae and G, sp. were used. One surface-sterilized spore was transferred to a 5-cm diameter Petri dish with 10 mi of 10 mM MES buffer, plus 0.04 g of Gel-Gro. The contents of a vermiculite-perlite (1/1, v/v) dish with 2-week-old clover seedlings were transferred onto the Gel-Gro medium with the germinated spore. All plants inoculated with single germinated spores developed mycorrhizas. With this system, non-destructive observation of development of hyphae, formation of fan-like structures, hyphal contact and penetration of AM fungi into the plant root was possible. (C) 2001 Elsevier Science Ltd. All rights reserved. C1 Estac Expt Zaidin, Dept Microbiol, E-18008 Granada, Spain. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. RP Ocampo, JA, Estac Expt Zaidin, Dept Microbiol, Professor Albareda 1, E-18008 Granada, Spain. NR 11 TC 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD JUL PY 2001 VL 33 IS 9 BP 1283 EP 1285 PG 3 SC Soil Science GA 454KG UT ISI:000169971300019 ER PT J AU Greiner, J Cuby, JG McCaughrean, MJ Castro-Tirado, AJ Mennickent, RE TI Identification of the donor in the X-ray binary GRS 1915+105 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : binaries; infrared : stars; stars : individual : GRS 1915+105 ID SUPERLUMINAL SOURCE GRS-1915+105; MICROQUASAR GRS-1915+105; SPECTRA; STARS; SPECTROSCOPY; TEMPERATURE; GIANTS; BAND AB We report on the results of medium-resolution spectroscopy of GRS 1915+105 in the near-infrared H and K band using the 8 m VLT at ESO. We clearly identify absorption bandheads from (CO)-C-12 and (CO)-C-13. Together with other features this results in a classification of the mass-donating star in this binary as a K-MIII star, clearly indicating that GRS 1915+105 belongs to the class of low-mass X-ray binaries (LMXB). C1 Astrophys Inst Potsdam, D-14482 Potsdam, Germany. European So Observ, Santiago 19, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. LAEFF, INTA, Madrid 208080, Spain. Concepcion Univ, Concepcion, Chile. RP Greiner, J, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany. NR 25 TC 40 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2001 VL 373 IS 3 BP L37 EP L40 PG 4 SC Astronomy & Astrophysics GA 454MX UT ISI:000169977300005 ER PT J AU Dahlem, M Lazendic, JS Haynes, RF Ehle, M Lisenfeld, U TI Warm dust as a tracer of galaxies with gaseous halos SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : general; galaxies : evolution; galaxies : halos; galaxies : starburst; radio continuum : galaxies ID ON SPIRAL GALAXIES; RADIO-CONTINUUM OBSERVATIONS; DIFFUSE IONIZED-GAS; EDGE-ON; STAR-FORMATION; STARBURST GALAXIES; GHZ ATLAS; SAMPLE; EMISSION; NGC-891 AB We present radio continuum observations conducted with the VLA and ATCA of a sample of 15 edge-on spiral galaxies. 11 of these galaxies, with inclination angles of i greater than or similar to 75 degrees and neither active galactic nuclei nor nearby interaction partners, are suitable for studies of halo properties in relation to the level of star formation in their disks. In 6 of these 11 galaxies radio halos were detected at the angular resolution of the current data. In the remaining cases the presence of halo emission could not be proven unambiguously, partly due to relatively low angular resolution. A clear trend was found that galaxies with radio halos are those with the highest far-infrared 60 mum to 100 mum flux ratios. This shows the suitability of high f(60)/f(100) ratios of greater than or equal to0.4 as a reliable tracer of galaxies with high star formation rates and related disk-halo interactions, leading to the presence of extraplanar emission, e.g. from cosmic ray electrons. The measured exponential scale heights of those 6 radio halos that were clearly detected range from about 1.4 to 3.1 kpc. All 4 physically small galaxies in our sample do show extraplanar synchrotron radio emission, indicating that their more shallow gravitational potential compared to normal-sized spirals might facilitate the escape of cosmic-ray electrons from the sites of star formation in their disks. Although the galaxies with the highest energy input rates into the ISM of their disks are those that have the most prominent radio halos, there is no direct relation between the halo scale heights and the energy input rates. Instead, the scale heights of the radio halos are dominated by the energy losses of the cosmic ray electrons on their way out of the galaxy disks. C1 Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands. Univ Sydney, Sch Phys A28, Dept Astrophys, Sydney, NSW 2006, Australia. Australia Telescope Natl Facil, Epping, NSW 2121, Australia. XMM Newton Sci Operat Ctr, Madrid 28080, Spain. European Space Agcy, ESTEC, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, Netherlands. IRAM, E-18012 Granada, Spain. RP Dahlem, M, European So Observ, Alonso de Cordova 3107,Casilla 19001, Santiago 19, Chile. NR 41 TC 17 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2001 VL 374 IS 1 BP 42 EP 65 DI 10.1051/0004-6361:20010639 PG 24 SC Astronomy & Astrophysics GA 454QZ UT ISI:000169984400007 ER PT J AU Arentoft, T Sterken, C Handler, G Freyhammer, LM Bruch, A Niarchos, P Gazeas, K Manimanis, V Van Cauteren, P Poretti, E Dawson, DW Liu, ZL Zhou, AY Du, BT Shobbrock, RR Garrido, R Fried, R Akan, MC Ibanoglu, C Evren, S Tas, G Johnson, D Blake, C Kurtz, DW TI V 1162 Ori: A multiperiodic delta Scuti star with variable period and amplitude SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : variables : delta Scuti; stars : individual : V 1162 Orionis; techniques : photometric; methods : data analysis ID MODAL DISCRIMINATION; CANUM-VENATICORUM; PULSATING STARS; LIGHT CURVES; PHOTOMETRY; CAMPAIGN; CLUSTER AB We present the results of multisite observations of the delta Scuti star V1162 Ori. The observations were done in the period October 1999 - May 2000, when 18 telescopes at 15 observatories were used to collect 253 light extrema during a total of 290 hours of time-series observations. The purpose of the observations was to investigate amplitude and period variability previously observed in this star, and to search for low-amplitude frequencies. We detect, apart from the main frequency and its two first harmonics, four additional frequencies in the light curves, all with low amplitudes (1-3 mmag). Combining the present data set with data obtained in 1998-99 at ESO confirms the new frequencies and reveals the probable presence of yet another pulsational frequency. All five low-amplitude frequencies are statistically significant in the data, but at least one of them (f(5)) suffers from uncertainty due to aliasing. Using colour photometry we find evidence for a radial main frequency (f(1)), while most or all low-amplitude frequencies are likely non-radial. We show that the main frequency of V1162 Ori has variable amplitude and period/phase, the latter is also displayed in the O-C diagram from light extrema. The amplitude variability in our data is cyclic with a period of 282 d and a range of nearly 20 mmag, but earlier amplitude values quoted in the literature cannot be explained by this cyclic variation. O-C analysis including data from the literature show that the period of V1162 Ori displays a linear period change as well as sudden or cyclic variations on a time scale similar to that of the amplitude variations. C1 Free Univ Brussels, B-1050 Brussels, Belgium. S African Astron Observ, ZA-7935 Cape Town, South Africa. Observ Royal Belgique, B-1180 Brussels, Belgium. Lab Nacl Astrofis, BR-37500000 Itajuba, MG, Brazil. Univ Athens, Dept Astrophys Astron & Mech, Athens 15784, Greece. Osserv Astron Brera, I-23807 Merate, Italy. San Diego State Univ, Dept Astron, San Diego, CA 92182 USA. Western Connecticut State Univ, Dept Phys & Astron, Danbury, CT 06810 USA. Chinese Acad Sci, Beijing Astron Observ, Beijing 100012, Peoples R China. Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Braeside Observ, Flagstaff, AZ USA. Ege Univ Observ, TR-35100 Izmir, Turkey. Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England. Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa. Observ Midi Pyrenees, Astrophys Lab, F-31400 Toulouse, France. RP Arentoft, T, Free Univ Brussels, Pleinlaan 2, B-1050 Brussels, Belgium. NR 30 TC 9 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2001 VL 374 IS 3 BP 1056 EP 1070 PG 15 SC Astronomy & Astrophysics GA 458VJ UT ISI:000170215900028 ER PT J AU Fernandes, RC Heckman, T Schmitt, H Delgado, RMG Storchi-Bergmann, T TI Empirical diagnostics of the starburst-AGN connection SO ASTROPHYSICAL JOURNAL LA English DT Review DE galaxies : active; galaxies : nuclei; galaxies : Seyfert ID ACTIVE GALACTIC NUCLEI; SEYFERT 2 GALAXIES; BROAD-LINE REGIONS; ULTRALUMINOUS INFRARED GALAXIES; STAR-FORMATION; POPULATION SYNTHESIS; CYGNUS-A; STELLAR POPULATIONS; COMPOSITE SPECTRA; MERGING GALAXIES AB We examine a representative sample of 35 Seyfert 2 nuclei. Previous work has shown that nearly half (15) of these nuclei show the direct (but difficult to detect) spectroscopic signature at optical/near-UV wavelengths of the hot massive stars that power circumnuclear starbursts. In the present paper we examine a variety of more easily measured quantities for this sample, such as the equivalent widths of strong absorption features, continuum colors, emission line equivalent widths, emission line ratios and profiles, far-IR luminosities, and near-UV surface brightness. We compare the composite starburst + Seyfert 2 nuclei to "pure" Seyfert 2 nuclei, Starburst galaxies, and normal galactic nuclei. Our goals are to verify whether the easily measured properties of the composite nuclei are consistent with the expected impact of a starburst and to investigate alternative less demanding methods to infer the presence of starbursts in Seyfert 2 nuclei, applicable to larger or more distant samples. We show that starbursts do indeed leave clear and easily quantifiable imprints on the near-UV to optical continuum and emission line properties of Seyfert 2s. Composite starburst + Seyfert 2 systems can be recognized by: (1) a strong "featureless continuum" (FC), which dilutes the Ca II K line from old stars in the host's bulge to an equivalent width W-K < 10 Angstrom; (2) emission lines whose equivalent widths are intermediate between starburst galaxies and "pure" Seyfert 2's; (3) relatively low excitation line ratios, which indicate that part of the gas ionization in these Seyfert 2s (typically similar to 50% of H beta) is due to photoionization by OB stars; (4) large far-IR luminosities (greater than or similar to 10(10) L-circle dot); (5) high near-UV surface brightness (similar to 10(3) L-circle dot pc(-2)). These characteristics are all consistent with the expected impact of circumnuclear starbursts on the observed properties of Seyfert 2's. Furthermore, they offer alternative empirical diagnostics of the presence of circumnuclear starbursts from a few easily measured quantities. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Space Telescope Sci Inst, Socorro, NM 87801 USA. Natl Radio Astron Observ, Socorro, NM 87801 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. RP Fernandes, RC, Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. NR 136 TC 65 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 2001 VL 558 IS 1 PN Part 1 BP 81 EP 108 PG 28 SC Astronomy & Astrophysics GA 469CB UT ISI:000170794300009 ER PT J AU Gerbal, D Capelato, HV Durret, F Neto, GBL Marquez, I TI Some new observed properties of elliptical galaxies SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID FUNDAMENTAL PLANE; PROFILES AB We suggest that elliptical galaxies, as stellar systems in a stage of quasi-equilibrium, may have a specific entropy. We use the Sersic law to describe the light profile. The specific entropy (the Boltzmann-Gibbs definition) is then calculated assuming that the galaxy behaves as a spherical, isotropic, one-component system. We predict a relation between the three parameters of the Sersic law linked to the specific entropy, defining a surface in the parameter space, an `entropic plane'. We have analysed a sample of simulated merging elliptical galaxies (virtual) and a sample of galaxies belonging to the Coma Cluster (real). Both virtual and real galaxies are: 1) located in their own `entropic plane' and 2) in this plane, they are located on a straight line, indicating constant entropy: another physical property. A careful examination of the value of the specific entropy indicates a very small increase in the specific entropy with the generation after merging (virtual sample). Although one cannot distinguish between various generations for real galaxies, the distribution of specific entropy in this sample is very similar to that in the virtual sample. C1 CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Paris 07, CNRS, Observ Paris, DAEC, F-92195 Meudon, France. Inst Pesquisas Espaciais, Sao Paulo, Brazil. USP, Inst Astron & Geofis, BR-09500900 Sao Paulo, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Gerbal, D, CNRS, Inst Astrophys Paris, 98bis,Bd Arago, F-75014 Paris, France. NR 9 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2001 VL 276 IS 2-4 BP 861 EP 868 PG 8 SC Astronomy & Astrophysics GA 471TU UT ISI:000170945400065 ER PT J AU Rodriguez, E Lopez-Gonzalez, MJ Rolland, A Costa, V Gonzalez-Bedolla, SF TI Simultaneous uvby photometry of the delta Sct star HD 129231 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : variables : delta Scu; stars : individual : HD 129231; stars : oscillations; techniques : photometric ID A-TYPE STARS; PULSATING B-STAR; SCUTI STARS; HIPPARCOS PARALLAXES; MODAL DISCRIMINATION; SURFACE GRAVITY; BETA PHOTOMETRY; F-STARS; CALIBRATIONS; LUMINOSITY AB We present the results of a three-year Stromgren uvby photometric study of the recently discovered multiperiodic low amplitude delta Sct-type pulsator HD 129231. Some additional H-beta-Crawford measurements were also collected. Multiperiodicity is needed to describe the pulsational behaviour of this variable during each of the observing runs. A set of five significant frequencies has been found as the best fitting for the 1997 dataset, but only the two main ones result as significant during the 1995 and 1996 observing runs. Amplitude variations from season to season are also found for the main frequency f(1). Nonradial pulsation is suggested for some of the modes. Using the derived uvby beta indices, the most relevant physical parameters of HD 129231 are also determined placing this object as a hot Population I delta Sct star evolving on its main sequence stage. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Mexico City 4510, DF, Mexico. RP Rodriguez, E, CSIC, Inst Astrofis Andalucia, POB 3004, E-18080 Granada, Spain. NR 40 TC 7 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2001 VL 376 IS 2 BP 489 EP 496 PG 8 SC Astronomy & Astrophysics GA 474CM UT ISI:000171086800016 ER PT J AU Storchi-Bergmann, T Delgado, RMG Schmitt, HR Fernandes, RC Heckman, T TI Circumnuclear stellar population, morphology, and environment of Seyfert 2 galaxies: An evolutionary scenario SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : nuclei; galaxies : Seyfert; galaxies : starburst; galaxies : stellar content ID ACTIVE GALACTIC NUCLEI; BROAD-LINE REGIONS; STAR-FORMATION; HOST GALAXIES; BLACK-HOLES; SPECTROSCOPY; STARBURSTS; QUASARS; MERGERS; OBJECTS AB We investigate the relation between the characteristics of the circumnuclear stellar population and both the galaxy morphology and the presence of close companions for a sample of 35 Seyfert 2 nuclei. Fifteen galaxies present unambiguous signatures of recent episodes of star formation within approximate to 300 pc of the nucleus. When we relate this property to the Hubble type of the host galaxy, we find that the incidence of recent circumnuclear star formation increases along the Hubble sequence; it seems to be greater than that in non-Seyfert galaxies for the early Hubble types SO and Sa but similar to that in non-Seyfert galaxies for later Hubble types. In both early-type and late-type Seyfert galaxies, the presence of recent circumnuclear star formation is related to the galaxy morphology in the inner few kiloparsecs, as observed in Hubble Space Telescope images through the filter F606W by Malkan et al., who have assigned a late "inner Hubble type" to most Seyfert 2 galaxies with recent circumnuclear star formation. This new classification is due to the presence of dust lanes and spiral structures in the inner region. The presence of recent star formation around Seyfert 2 nuclei is also related to interactions: among the 13 galaxies of the sample with close companions or in mergers, nine have recent star formation in the nuclear region. These correlations between the presence of companions, the inner morphology, and the incidence of recent star formation suggest an evolutionary scenario in which the interaction is responsible for sending gas inward, which both feeds the active galactic nucleus and triggers star formation. The starburst then fades with time and the composite Seyfert 2 + starburst nucleus evolves to a "pure" Seyfert 2 nucleus with an old stellar population. This scenario can reconcile the hypothesis that the active nucleus in Seyfert galaxies is triggered by interactions with the results of previous studies, which find only a small excess of interacting galaxies in Seyfert samples when compared with non-Seyfert samples. The large excess can only be found early after the interaction, in the phase in which a composite (Seyfert+starburst) nucleus is observed. C1 Univ Fed Rio Grande Sul, Inst Fis, Porto Alegre, RS, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Radio Astron Observ, Socorro, NM 87801 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. RP Storchi-Bergmann, T, Univ Fed Rio Grande Sul, Inst Fis, Campus Vale,Caixa Postal 15051, Porto Alegre, RS, Brazil. NR 65 TC 40 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 20 PY 2001 VL 559 IS 1 PN Part 1 BP 147 EP 156 PG 10 SC Astronomy & Astrophysics GA 478WP UT ISI:000171371300014 ER PT J AU Braine, J Duc, PA Lisenfeld, U Charmandaris, V Vallejo, O Leon, S Brinks, E TI Abundant molecular gas in tidal dwarf galaxies: On-going galaxy formation SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : formation; galaxies : evolution; galaxies : formation; galaxies : interactions; galaxies : ISM; cosmology : dark matter ID LARGE-SCALE STRUCTURE; COLD DARK-MATTER; H-II REGIONS; IRREGULAR GALAXIES; MAGELLANIC CLOUDS; NGC-2782 ARP-215; SPIRAL GALAXIES; ELLIPTICAL GALAXIES; GLOBAL PROPERTIES; STEPHANS-QUINTET AB We investigate the process of galaxy formation as can be observed in the only currently forming galaxies {the so-called Tidal Dwarf Galaxies, hereafter TDGs {through observations of the molecular gas detected via its CO (Carbon Monoxide) emission. These objects are formed of material torn off of the outer parts of a spiral disk due to tidal forces in a collision between two massive galaxies. Molecular gas is a key element in the galaxy formation process, providing the link between a cloud of gas and a bona fide galaxy. We have detected CO in 8 TDGs (two of them have already been published in Braine et al. 2000, hereafter Paper I), with an overall detection rate of 80%, showing that molecular gas is abundant in TDGs, up to a few 10(8) M-.. The CO emission coincides both spatially and kinematically with the HI emission, indicating that the molecular gas forms from the atomic hydrogen where the HI column density is high. A possible trend of more evolved TDGs having greater molecular gas masses is observed, in accord with the transformation of HI into H-2. Although TDGs share many of the properties of small irregulars, their CO luminosity is much greater (factor similar to 100) than that of standard dwarf galaxies of comparable luminosity. This is most likely a consequence of the higher metallicity (greater than or similar to1/3 solar) of TDGs which makes CO a good tracer of molecular gas. This allows us to study star formation in environments ordinarily inaccessible due to the extreme difficulty of measuring the molecular gas mass. The star formation efficiency, measured by the CO luminosity per H alpha flux, is the same in TDGs and full-sized spirals. CO is likely the best tracer of the dynamics of these objects because some fraction of the HI near the TDGs may be part of the tidal tail and not bound to the TDG. Although uncertainties are large for individual objects, as the geometry is unknown, our sample is now of eight detected objects and we find that the "dynamical" masses of TDGs, estimated from the CO line widths, seem not to be greater than the "visible" masses (HI + H-2 + a stellar component). Although higher spatial resolution CO (and HI) observations would help reduce the uncertainties, we find that TDGs require no dark matter, which would make them the only galaxy-sized systems where this is the case. Dark matter in spirals should then be in a halo and not a rotating disk. Most dwarf galaxies are dark matter-rich, implying that they are not of tidal origin. We provide strong evidence that TDGs are self-gravitating entities, implying that we are witnessing the ensemble of processes in galaxy formation: concentration of large amounts of gas in a bound object, condensation of the gas, which is atomic at this point, to form molecular gas and the subsequent star formation from the dense molecular component. C1 Observ Bordeaux, UMR 5804, CNRS, INSU, F-33270 Florac, France. CEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France. CNRS, URA 2052, F-91191 Gif Sur Yvette, France. Inst Radio Astron Millimetr, Granada 18012, Spain. Cornell Univ, Dept Astron, Ithaca, NY 14853 USA. Acad Sinica, ASIAA, Taipei 115, Taiwan. Univ Guanajuato, Dept Astron, Guanajuato, Mexico. RP Braine, J, Observ Bordeaux, UMR 5804, CNRS, INSU, BP 89, F-33270 Florac, France. NR 94 TC 59 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2001 VL 378 IS 1 BP 51 EP 69 PG 19 SC Astronomy & Astrophysics GA 480WM UT ISI:000171486600013 ER PT J AU Feroci, M Casella, P Costa, E Massaro, E Soffitta, P Matt, G Belloni, T Castro-Tirado, AJ Dhawan, V Frontera, F Harmon, A Mirabel, F Pooley, G Tavani, M TI BeppoSAX observations of GRS 1915+105 SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE X-ray sources; accretion disk; microquasar; GRS 1915+105 ID GRS-1915+105; BURSTS AB The galactic superluminal source GRS 1915+105 was observed by BeppoSAX at several occasions from October 1996 to April 2000. In April 1999 the 2-10 keV light curve showed a long series of quasi regular pulses with a recurrence time of about 50 s. Some preliminary results of a spectral analysis are presented. C1 CNR, Ist Astrofis Spaziale, Rome, Italy. Univ Roma Tre, Dipartimento Fis, Rome, Italy. Osserv Astron Brera, Merate, Italy. Ist Astrofis Andalucia, Granada, Spain. NRAO, Socorro, NM USA. CNR, Ist TESRE, I-40126 Bologna, Italy. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. CEA, Serv Astrophys, Saclay, France. Consejo Nacl Invest Cient & Tecn, IAFE, RA-1033 Buenos Aires, DF, Argentina. Mullard Radio Astron Observ, Cambridge, England. CNR, Ist Fis Cosmica, I-20133 Milan, Italy. RP Feroci, M, CNR, Ist Astrofis Spaziale, Rome, Italy. NR 11 TC 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2001 VL 276 SU Suppl. S BP 15 EP 18 PG 4 SC Astronomy & Astrophysics GA 481BW UT ISI:000171500900006 ER PT J AU Ueda, Y Yamaoka, K Grove, JE McCollough, M Durouchoux, P Rodriguez, J Mirabel, F Swank, J Feroci, M Casella, P Castro-Tirado, AJ Sanchez-Fernandez, C Chaty, S Castaneda, H Kohno, K Dhawan, V Trushkin, SA Ebisawa, K Kotani, T Inoue, H CA Multiwavelength Campaign Team TI The 2000 April multiwavelength campaign of GRS 1915+105 SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE GRS 1915+105; multiwavelength observations ID GRS-1915+105 AB We report results from multiwavelength observations of the microquasar GRS 1915+105 performed during the 2000 April campaign. This is one of the biggest campaigns ever made for this source covering the broad band from radio to gamma -rays. Multiwavelength light curves compiled from all the data reduced up to date and broad band spectra obtained with ASCA and RXTE are presented. C1 Inst Space & Astronaut Sci, Sagamihara, Kanagawa 229, Japan. USN, Res Lab, Washington, DC 20375 USA. NASA, MSFC, Huntsville, AL USA. Serv Astrophys, Saclay, France. Consejo Nacl Invest Cient & Tecn, IAFE, RA-1033 Buenos Aires, DF, Argentina. NASA, GSFC, Greenbelt, MD USA. CNR, Ist Astrofis Spaziale, I-00185 Rome, Italy. CSIC, IAA, Granada, Spain. INTA, LAEFF, Madrid, Spain. Open Univ, Dept Phys & Astron, Milton Keynes, Bucks, England. Observ Astron Nacl Mexico, Mexico City, DF, Mexico. NAO, Nobeyama Radio Observ, Nagano, Japan. NRAO, Charlottesville, VA USA. RP Ueda, Y, Inst Space & Astronaut Sci, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan. NR 6 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2001 VL 276 SU Suppl. S BP 25 EP 28 PG 4 SC Astronomy & Astrophysics GA 481BW UT ISI:000171500900009 ER PT J AU Greiner, J McCaughrean, M Cuby, JG Castro-Tirado, AJ Mennickent, RE TI Identification of the donor in GRS 1915+105 SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE X-ray binary; GRS 1915+105; infrared observations ID GRS-1915+105; SPECTRA; SPECTROSCOPY; STARS; BAND AB We report on medium-resolution H and K band spectroscopy of GRS 1915+ 105 using the 8m VLT at ESO. We clearly identify absorption bandheads from (CO)-C-12/(CO)-C-13. Together with other features we classify the donor as a K-M III star. C1 Astrophys Inst Potsdam, D-14482 Potsdam, Germany. European So Observ, Santiago 19, Chile. Inst Astrofis Andalucia, E-18080 Granada, Spain. Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Concepcion Univ, Concepcion, Chile. RP Greiner, J, Astrophys Inst Potsdam, D-14482 Potsdam, Germany. NR 14 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2001 VL 276 SU Suppl. S BP 31 EP 34 PG 4 SC Astronomy & Astrophysics GA 481BW UT ISI:000171500900010 ER PT J AU Torrelles, JM Patel, NA Gomez, JF Ho, PTP Rodriguez, LF Anglada, G Garay, G Greenhill, L Curiel, S Canto, J TI Discovery of linear "building blocks" of water masers shaping linear/arcuate microstructures in Cepheus A SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (Cepheus A); ISM : jets and outflows; masers; stars : formation ID STAR-FORMING REGION; THERMAL RADIO JET; BIPOLAR OUTFLOW; H2O MASERS; A HW2; CONTINUUM; EMISSION; IMAGES AB We report three epochs of VLBA water maser observations toward the radio jet Cepheus A HW2. The VLBA data show that some of the masers detected previously with the VLA unfold into unexpected and remarkable linear/arcuate "microstructures," revealing, in particular three filaments (R1, R2, R3) with length sizes similar or equal to3-25 mas (2-18 AU) and unresolved in the perpendicular direction (less than or similar to0.1 AU), an arcuate structure (R4-A) of similar or equal to 20 mas size (15 AU), and a curved chain of masers (R5; which we have previously reported) of similar or equal to 100 mas size (similar or equal to 72 AU). Some of these structures unfold into even smaller linear "building blocks" (down to scales of 0.4 AU) shaping the "larger" structures. The flattened appearance of these small pieces argues strongly for a shock nature. Both the morphology and the observed proper motions found in these water maser structures have allowed us to identify at least three different centers of star formation activity in a region of similar or equal to 300 mas (200 AU) projected radius, unknown previously, and that could constitute a triple star system. We suggest that R1, R2, and R3, which are located close to the HW2 radio jet but offset by similar or equal to 200 mas with respect to its axis, could originate at the shocked walls of an inner cavity excavated by the HW2 wind in the circumstellar molecular gas. The presence of a wide-angle wind associated with the central HW2 object is implied. We also propose that the arcuate structure R4-A corresponds to a bow-shock structure produced by the wind of an undetected protostar (which we predict to be located toward the southeast of R4-A, similar or equal to 200 mas south from HW2). Finally, the third energy source of this small region could be that one exciting the arc R5, which, as we have previously reported, is expanding and related to an unidentified protostar located similar or equal to 600 mas south of HW2. The flux density of the water masers of the R5 arc excited by this unknown protostar (similar to 500 Jy) represents an important fraction (similar to 50%) of the total flux density of the maser emission in the entire Cepheus A star-forming region, suggesting that the exciting object could be a high-mass star. Furthermore, we find that the center of the circle, which Dt the R5 arc structure for each epoch, is moving with a velocity of similar to6 km s(-1). This could be caused by proper motions of the associated protostar because of relative orbital motions within the triple star system formed by HW2 and the energy sources of the R4-A and R5 structures. C1 CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Inst Nacl Tecn Aeroespacial, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Chile, Dept Astron, Santiago, Chile. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Torrelles, JM, CSIC, Inst Estudis Espacials Catalunya, C Gran Capita 2-4, E-08034 Barcelona, Spain. NR 27 TC 28 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 20 PY 2001 VL 560 IS 2 PN Part 1 BP 853 EP 864 PG 12 SC Astronomy & Astrophysics GA 483TM UT ISI:000171652000031 ER PT J AU Cairos, LM Caon, N Vilchez, JM Gonzalez-Perez, JN Munoz-Tunon, C TI Multiband analysis of a sample of blue compact dwarf galaxies. II. Spatially resolved and integrated photometry SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE galaxies : dwarf; galaxies : photometry; galaxies : starburst ID RECENT STAR-FORMATION; R-SURFACE PHOTOMETRY; SPECTROPHOTOMETRY; CLUSTERS; OBJECTS; REGIONS; CCD AB This is the second in a series of papers devoted to the study of a sample of 28 blue compact dwarf galaxies (BCDs). In the first paper, we presented the broadband observations in B, V, R, and I. Deep contour maps, surface-brightness profiles, and color profiles were used to analyze and discuss their morphology and structure. Here, we present new U-band and H alpha observations. We compute isophotal and asymptotic magnitudes of the sample galaxies and total H alpha fluxes. Comparison with previous works is done to assess the quality of the data available for BCDs. Finally, we produce an atlas of detailed color and H alpha maps, the Drst systematic atlas of this kind published so far. The high quality of the data allows us to identify the different star-forming knots in the maps and to discriminate between them and the regions where star formation activity has already ceased. We supplement the atlas with a morphological description of each galaxy and group the galaxies in four classes according to the distribution of their star-forming regions. C1 Inst Astrofis Canarias, E-38200 La Laguna, Tenerife, Spain. Univ Chile, Dept Astron, Santiago, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Cairos, LM, Inst Astrofis Canarias, E-38200 La Laguna, Tenerife, Spain. NR 44 TC 35 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0067-0049 J9 ASTROPHYS J SUPPL SER JI Astrophys. J. Suppl. Ser. PD OCT PY 2001 VL 136 IS 2 BP 393 EP 416 PG 24 SC Astronomy & Astrophysics GA 486CA UT ISI:000171799800003 ER PT J AU Calzada, JE Nieto, A Beraun, Y Martin, J TI Chemokine receptor CCR5 polymorphisms and Chagas' disease cardiomyopathy SO TISSUE ANTIGENS LA English DT Article DE CCR5; polymorphism; Trypanosoma cruzi; Chagas' disease ID TRYPANOSOMA-CRUZI; HUMAN MACROPHAGES; BETA-CHEMOKINES; HIV-1 INFECTION; NITRIC-OXIDE; PROMOTER; INFLAMMATION; POPULATIONS; INDIVIDUALS; PROGRESSION AB In this study we investigated the possible role of two CCR5 gene polymorphisms, CCR5 Delta 32 deletion and CCR5 59029 A -->G promoter point mutation, in determining the susceptibility to Trypanosoma cn,(Zi infection as well as in the development of chagasic heart disease. These CCR5 polymorphisms were assessed in 85 seropositive (asymptomatic, n=53; cardi- omyopathic, n=32) and 87 seronegative individuals. The extremely low frequency (0.009) of the CCR5 Delta 32 allele in our population did not allow us to analyse its possible influence on T cruzi infection. We found no differences in the distribution of CCR5 59029 promoter genotype or phenotype frequencies between total chagasic patients and controls. However, we observed that the CCR5 59029-A/G genotype was significantly increased in asymptomatic with respect to cardiomyopathic patients (P=0 02; OR=0 33 95% CI 0.10- 0.94). In addition, the presence of the CCR5 59029-G allele was also increased in asymptomatics when compared with cardiomyopathics (P=0 02;. OR=0.35, 95% CI 0.12-0.96). Our data suggest that the CCR5 59029 promoter polymorphism may be involved in a differential susceptibility to chagasic cardiomyopathy. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Hosp Nacl Guillermo Almenara, EsSALUD, Lima, Peru. RP Martin, J, CSIC, Inst Parasitol & Biomed Lopez Neyra, C Ventanilla 11, Granada 18001, Spain. NR 29 TC 16 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0001-2815 J9 TISSUE ANTIGEN JI Tissue Antigens PD SEP PY 2001 VL 58 IS 3 BP 154 EP 158 PG 5 SC Cell Biology; Immunology; Pathology GA 491TJ UT ISI:000172124800002 ER PT J AU Miranda, LF Gomez, Y Anglada, G Torrelles, JM TI Water-maser emission from a planetary nebula with a magnetized torus SO NATURE LA English DT Article ID STAR-FORMING REGIONS; H2O MASERS; PROTOPLANETARY NEBULA; RADIO MORPHOLOGY; EVOLVED STARS; YOUNG; BIPOLAR; K-3-35 AB A star like the Sun becomes a planetary nebula towards the end of its life, when the envelope ejected during the earlier giant phase becomes photoionized as the surface of the remnant star reaches a temperature of similar to 30,000 K. The spherical symmetry of the giant phase is lost in the transition to a planetary nebula, when nonspherical shells and powerful jets develop. Molecules that were present in the giant envelope are progressively destroyed by the radiation(1). The water-vapour masers that are typical of the giant envelopes(2,3) therefore are not expected to persist in planetary nebulae(1,4). Here we report the detection of water-maser emission from the planetary nebula K3-35. The masers are in a magnetized torus with a radius of about 85 astronomical units and are also found at the surprisingly large distance of about 5,000 astronomical units from the star, in the tips of bipolar lobes of gas. The precessing jets from K3-35 are probably involved in the excitation of the distant masers, although their existence is nevertheless puzzling. We infer that K3-35 is being observed at the very moment of its transformation from a giant star to a planetary nebula. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. RP Miranda, LF, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004, E-18080 Granada, Spain. NR 30 TC 44 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD NOV 15 PY 2001 VL 414 IS 6861 BP 284 EP 286 PG 3 SC Multidisciplinary Sciences GA 492CM UT ISI:000172150700036 ER PT J AU Marquez, I Neto, GBL Capelato, H Durret, F Gerbal, D Lanzoni, B TI Two physical laws for elliptical galaxies: Photometrical consequences SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE galaxies : clusters; individual : Coma ABCG 85; galaxies : distances and redshifts; galaxies : elliptical and lenticular cD; galaxies : fundamental parameters; distance scale C1 CSIC, IAA, E-18080 Granada, Spain. USP, IAG, BR-09500900 Sao Paulo, Brazil. Inst Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos, SP, Brazil. CNRS, IAP, F-75014 Paris, France. RP Marquez, I, CSIC, IAA, Apdo 3004, E-18080 Granada, Spain. NR 0 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2001 VL 277 SU Suppl. 1 BP 481 EP 481 PG 1 SC Astronomy & Astrophysics GA 492KQ UT ISI:000172167900123 ER PT J AU Martin, J Bereau, M Louisanna, E Ocampo, JA TI Arbuscular mycorrhizas in Dicorynia guianensis and Eperua falcata trees from primary tropical rain forest of French Guiana SO SYMBIOSIS LA English DT Article DE Dicorynia guianensis; Eperua falcata; glycine max; rainforest; arbuscular mycorrhizas ID ROOT; PLANT; FUNGI; SOIL; MORPHOLOGY; PROPAGULES; PIONEER; DENSITY; GUYANA AB The most probable number of arbuscular mycorrhizal (AM) fungal propagules, spore density and mycorrhizal colonization were studied in Dicorynia guianensis and Eperua falcata trees in three sites of the primary rain forest of French Guiana. A high number of propagules (17-230 per g soil) and number of spores (50-154 per g of soil) were found in the rhizosphere soil of both trees. The number of propagules and spores were similar in the rhizosphere soil of D. guianensis trees in all the three sites tested. In the rhizosphere soil of E. falcata from the Grand Plateau site, the highest number of propagules and spores were found. There were similar numbers of propagules and spores in the rhizosphere of E. falcata from the Petit Plateau and Paracou sites; in these sites the number of propagules and spores in the rhizosphere soil of D. guianensis was higher than in the E. falcata rhizosphere soil. The number of propagules was correlated with the number of spores but not with the level of AM colonization. The percentage of AM root length colonization was high (> 60%) and similar in both trees from all the sites tested. No arbuscules were observed in roots of trees from any of the soil samples tested, but soybean grown in these soils developed many arbuscules. C1 CSIC, Estac Expt Zaidin, Dept Microbiol, E-18008 Granada, Spain. INRA, Stn Rech Forestieres, F-97387 Kourou, France. RP Ocampo, JA, CSIC, Estac Expt Zaidin, Dept Microbiol, Prof Albareda 1, E-18008 Granada, Spain. NR 36 TC 2 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT 76120, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 2001 VL 31 IS 4 BP 283 EP 291 PG 9 SC Microbiology GA 493QU UT ISI:000172235600003 ER PT J AU Riera, A Lopez, R Raga, AC Anglada, G Estalella, R TI The transverse velocity structure of the HH 111 jet SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE ISM : individual (HH 111); ISM : jets and outflows; stars : pre-main-sequence AB We present long-slit spectroscopic observations of the HH 111 jet obtained with the 4.2 m William Herschel Telescope. We have obtained spectra for slit positions along and across the jet axis, in order to search for radial velocity, electron density and excitation variations across the jet. We have detected faint emission across knots HH 111 D and F, extending to large (approximate to 15 ") distances from the flow axis. This extended emission shows a radial velocity stratification, with higher radial velocities oil the jet axis and lower velocities away from the axis. Knot D has a low central electron density surrounded by material with higher electron densities, while the electron density is approximately constant across knot F. We argue that the extended emission and the radial velocity variations observed across the HH 111 flow are compatible with a jet beam with a transverse gradient in velocity or with a jet which is entraining low velocity material. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Politecn Catalunya, Dept Fis & Engn Nucl, E-08800 Vilanova I La Geltru, Spain. RP Riera, A, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004, E-18080 Granada, Spain. NR 0 TC 6 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 2001 VL 37 IS 2 BP 147 EP 157 PG 11 SC Astronomy & Astrophysics GA 494XY UT ISI:000172312200003 ER PT J AU Dickman, R Alava, M Munoz, MA Peltola, J Vespignani, A Zapperi, S TI Critical behavior of a one-dimensional fixed-energy stochastic sandpile SO PHYSICAL REVIEW E LA English DT Article ID SELF-ORGANIZED CRITICALITY; ABELIAN SANDPILE; CRITICAL EXPONENTS; PHASE-TRANSITIONS; ABSORBING STATES; FIELD-THEORY; MODEL; UNIVERSALITY; AVALANCHES; EVENTS AB We study a one-dimensional fixed-energy version (that is, with no input or loss of particles) of Manna's stochastic sandpile model, The system has a continuous transition to an absorbing state at a critical value of the particle density, and exhibits the hallmarks of an absorbing-state phase transition, including finite-size scaling. Critical exponents are obtained from extensive simulations, which treat stationary and transient properties, and an associated interface representation. These exponents characterize the universality class of an absorbing-state phase transition with a static conserved density in one dimension; they differ from those expected at a linear-interface depinning transition in a medium with point disorder, and from those of directed percolation. C1 Univ Fed Minas Gerais, ICEx, Dept Fis, BR-30161970 Belo Horizonte, MG, Brazil. Helsinki Univ Technol, Phys Lab, HUT-02105 Helsinki, Finland. Inst Carlos I Theoret & Computat Phys, Granada 18071, Spain. Dept Electromagnetismo & Fis Mat, Granada 18071, Spain. Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy. Univ Roma La Sapienza, Dipartimento Fis Enrico Fermi, INFM, I-00185 Rome, Italy. RP Dickman, R, Univ Fed Minas Gerais, ICEx, Dept Fis, Caixa Postal 702, BR-30161970 Belo Horizonte, MG, Brazil. NR 48 TC 27 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD NOV PY 2001 VL 64 IS 5 PN Part 2 AR 056104 DI 10.1103/PhysRevE.64.056104 PG 7 SC Physics, Fluids & Plasmas; Physics, Mathematical GA 496QH UT ISI:000172407100015 ER PT J AU Arancegui, N Lucena, PH Garcia, FG Martinez, M Urena, JL TI A comparative study of Streptococcus mutans strains by a molecular technique (PCR). SO JOURNAL OF DENTAL RESEARCH LA English DT Meeting Abstract C1 Fac Dent, Rosario, Argentina. Fac Dent, Granada, Spain. Univ Granada, Fac Med, E-18071 Granada, Spain. NR 0 TC 0 PU INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R PI ALEXANDRIA PA 1619 DUKE ST, ALEXANDRIA, VA 22314-3406 USA SN 0022-0345 J9 J DENT RES JI J. Dent. Res. PD APR PY 2001 VL 80 IS 4 BP 948 EP 948 PG 1 SC Dentistry, Oral Surgery & Medicine GA 497VL UT ISI:000172476100069 ER PT J AU Marquez, I Neto, GBL Capelato, H Durret, F Lanzoni, B Gerbal, D TI Energy, entropy and mass scaling relations for elliptical galaxies. Towards a physical understanding of their photometric properties SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : clusters : individual (Coma, Abell 85; Abell 496); galaxies : elliptical and lenticular, cD; galaxies : fundamental parameters; distance scale; gravitation ID FUNDAMENTAL PLANE; DISTANCE INDICATOR; LUMINOSITY-PROFILE; DARK-MATTER; CLUSTER; SHAPE; DYNAMICS; SYSTEMS; MERGERS AB In the present paper, we show that elliptical galaxies (Es) obey a scaling relation between potential energy and mass. Since they are relaxed systems in a post violent-relaxation stage, they are quasi-equilibrium gravitational systems and therefore they also have a quasi-constant specific entropy. Assuming that light traces mass, these two laws imply that in the space defined by the three Sersic law parameters (intensity Sigma (0), scale a and shape v), elliptical galaxies are distributed on two intersecting 2-manifolds: the Entropic Surface and the Energy-Mass Surface. Using a sample of 132 galaxies belonging to three nearby clusters, we have verified that ellipticals indeed follow these laws. This also implies that they are distributed along the intersection line (the Energy-Entropy line), thus they constitute a one-parameter family. These two physical laws (separately or combined), allow to find the theoretical origin of several observed photometrical relations, such as the correlation between absolute magnitude and effective surface brightness, and the fact that ellipticals are located on a surface in the [log R-eff, -2:5 log Sigma (0); log v] space. The fact that elliptical galaxies are a one-parameter family has important implications for cosmology and galaxy formation and evolution models. Moreover, the Energy-Entropy line could be used as a distance indicator. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. USP, Inst Astron & Geofis, BR-09500900 Sao Paulo, Brazil. Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos, SP, Brazil. CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Paris 07, Observ Paris, DAEC, CNRS,UA 173, F-92195 Meudon, France. Osservatorio Astron Bologna, I-40127 Bologna, Italy. RP Marquez, I, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. NR 40 TC 15 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 1432-0746 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2001 VL 379 IS 3 BP 767 EP 780 DI 10.1051/0004-6361:20011370 PG 14 SC Astronomy & Astrophysics GA 498HY UT ISI:000172505100004 ER PT J AU Kennedy, ML Cortes-Selva, F Perez-Victoria, JM Jimenez, IA Gonzalez, AG Munoz, OM Gamarro, F Castanys, S Ravelo, AG TI Chemosensitization of a multidrug-resistant Leishmania tropica line by new sesquiterpenes from Maytenus magellanica and Maytenus chubutensis SO JOURNAL OF MEDICINAL CHEMISTRY LA English DT Article ID ABSOLUTE-CONFIGURATION; CELASTRACEAE; ESTERS; GENE; PROMASTIGOTES; AMPLIFICATION; PHARMACOLOGY; TRANSPORTER; TRITERPENE; SCUTIOIDES AB Parasite resistance to drugs has emerged as a major problem in current medicine, and therefore, there is great clinical interest in developing compounds that overcome these resistances. In an intensive study of South American medicinal plants, herein we report the isolation, structure elucidation, and biological activity of dihydro-beta -agarofuran sesquiterpenes from the roots of Maytenus magellanica (1-14) and M. chubutensis (14-17). This type of natural products may be considered as privileged structures. The structures of 10 new compounds, 1, 3, 6-9, and 12-15, were determined by means of H-1 and C-13 NMR spectroscopic studies, including homonuclear (COSY and ROESY) and heteronuclear correlation experiments (HMQC and HMBC). The absolute configurations of eight hetero- and homochromophoric compounds, 1, 3, 6-9, 12, and 13, were determined by means of CD studies. Fourteen compounds, 1-3 and 6-16, have been tested on a multidrug-resistant Leishmania tropica line overexpressing a P-glycoprotein-like transporter to determine their ability to revert the resistance phenotype and to modulate intracellular drug accumulation. From this series, 1, 2, 3, 14, and 15 showed potent activity, 1 being the most active compound. The structure-activity relationships of the different compounds are discussed. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Univ Chile, Fac Ciencias, Santiago, Chile. Univ La Laguna, Inst Univ Bioorgan Antonio Gonzalez, La Laguna 38206, Tenerife, Spain. RP Castanys, S, CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. NR 41 TC 30 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-2623 J9 J MED CHEM JI J. Med. Chem. PD DEC 20 PY 2001 VL 44 IS 26 BP 4668 EP 4676 DI 10.1021/jm010970c PG 9 SC Chemistry, Medicinal GA 502NP UT ISI:000172749900017 ER PT J AU Gavazzi, G Boselli, A Mayer, L Iglesias-Paramo, J Vilchez, JM Carrasco, L TI 75 kiloparsec trails of ionized gas behind two irregular galaxies in A1367 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : individual (Abell 1367); galaxies : evolution; galaxies : irregular; intergalactic medium; methods : n-body simulations ID 3 PECULIAR GALAXIES; SPIRAL GALAXIES; CLUSTER GALAXIES; COMA SUPERCLUSTER; STAR-FORMATION; EVOLUTION; HARASSMENT; MATTER; A-1367; RADIO AB In a 6 hr H alpha exposure of the northwest region of the cluster of galaxies A1367, we discovered a 75 kpc cometary emission of ionized gas trailing behind two Irr galaxies. The H alpha trails correspond in position and length with tails of syncrotron radiation. At the galaxy side opposite to the tails, the two galaxies show bright H II regions aligned along arcs, where the star formation takes place at the prodigious rate of similar to1 M-. yr(-1). From the morphology of the galaxies and of the trailing material, we infer that the two galaxies are suffering from ram pressure due to their high-velocity motion through the cluster intergalactic medium. We estimate that similar to 10(9) M-. of gas, probably ionized in the giant H ii regions, is swept out, forming the tails. The tails cross each other at some 100 kpc from the present galaxy location, indicating that a major tidal event occurred some similar to 5 x 10(7) yr ago. We exclude that mutual harassment produced the observed morphology, and we show with numerical simulations that it could have marginally aided ram pressure stripping by loosening the potential well of the galaxies. C1 Univ Milano Bicocca, I-20126 Milan, Italy. Lab Astrophys Marseille, F-13376 Marseille 12, France. Univ Washington, Dept Astron, Seattle, WA 98195 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico. UNAM, Observ Astron Nacl, Ensenada 22860, Baja California, Mexico. RP Gavazzi, G, Univ Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy. NR 35 TC 32 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 2001 VL 563 IS 1 PN Part 2 BP L23 EP L26 PG 4 SC Astronomy & Astrophysics GA 504JD UT ISI:000172852800006 ER PT J AU Guerrero, MA Miranda, LF Chu, YH Rodriguez, M Williams, RM TI The constant-velocity highly collimated outflows of the planetary nebula He 2-90 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : jets and outflows; ISM : kinematics and dynamics; planetary nebulae : individual (He 2-90) ID HUBBLE-SPACE-TELESCOPE; KNOTTY OUTFLOW; BIPOLAR; MICROSTRUCTURES; SPECTROSCOPY; MYCN-18; OBJECTS; FLIERS; M-1-92; STARS AB We present high-dispersion echelle spectroscopic observations and a narrowband [N II] image of the remarkable jetlike features of He 2-90. They are detected in the echelle spectra in the H alpha and [N II] lines but not in other nebular lines. The [N II]/H alpha ratio is uniformly high, similar or equal to1. The observed kinematics reveals bipolar collimated outflows in the jetlike features and shows that the southeast (northwest) component expands toward (away from) the observer at a remarkably constant line-of-sight velocity, 26.0 +/- 0.5 km s(-1). The observed expansion velocity and the opening angle of the jetlike features are used to estimate an inclination angle of similar or equal to5 degrees with respect to the sky plane and a space expansion velocity of similar or equal to 290 km s(-1). The spectrum of the bright central nebula reveals a profusion of Fe lines and extended wings of the H alpha line, similar to those seen in symbiotic stars and some young planetary nebulae that are presumed to host a mass-exchanging binary system. If this is the case for He 2-90, the constant velocity and direction of the jets require a very stable dynamic system against precession and warping. C1 Univ Illinois, Dept Astron, Urbana, IL 61801 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INAOE, Puebla 72840, Mexico. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RP Guerrero, MA, Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA. NR 27 TC 6 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 2001 VL 563 IS 2 PN Part 1 BP 883 EP 888 PG 6 SC Astronomy & Astrophysics GA 504JE UT ISI:000172852900036 ER PT J AU Sulentic, JW Rosado, M Dultzin-Hacyan, D Verdes-Montenegro, L Trinchieri, G Xu, C Pietsch, W TI A multiwavelength study of Stephanis Quintet SO ASTRONOMICAL JOURNAL LA English DT Article DE galaxies : interactions; galaxies : kinematics and dynamics; galaxies : structure; galaxies : Seyfert; intergalactic medium ID HICKSON COMPACT-GROUPS; SEYFERT-GALAXY NGC-7319; FAR-INFRARED PROPERTIES; CARTWHEEL RING GALAXY; STAR-FORMATION RATES; X-RAY-EMISSION; DWARF GALAXIES; TIDAL TAILS; ENVIRONMENT; EVOLUTION AB Stephan's Quintet (SQ) is a compact group that we find in an atypical moment when a high-velocity intruder is passing through it. The intrusion is particularly interesting because a previous intruder had stripped most of the gas from the group members. This debris field was shocked in the ongoing collision with the new intruder. This evolutionary history agrees well with observations and explains how a strongly interacting system can show low levels of star formation. We present new multiwavelength data including previously unpublished ROSAT X-ray, Ha interference ISO MIR/FIR, and filter/Fabry-Perot, radio line and continuum images. These observations and previously published data provide new insights, as well as support for some previous hypotheses. (1) and H I velocities allow us to Fabry-Peerot unambiguously distinguish between gas associated with SQ and the new intruder. (2) Most detected emission regions are found in the remnant interstellar medium (ISM) of the new intruder, which allows us to infer its size and present physical state. (3) The few emission regions associated with the stripped ISM of SQ include the best candidate tidal dwarf galaxy. (4) Multiwavelength data suggest that strong MIR/FIR emission from the Seyfert 2 nucleus of NGC 7319 comes from dust heated directly by a power-law continuum rather than a starburst. (5) The correspondence between extended X-ray/radio continuum/forbidden optical emission confirms the existence of a large scale shock in SQ. (6) We confirm the presence of two stripped spiral members in the process of transformation into E/S0 morphology. Finally (7) observations are consistent with the idea that the collision in SQ is ongoing with possible detection of H II region ablation and Rayleigh-Taylor instabilities. C1 Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Inst Astrofis Andalucia, E-18080 Granada, Spain. Osserv Astron Brera, I-20121 Milan, Italy. CALTECH, IPAC, Pasadena, CA 91125 USA. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. RP Sulentic, JW, Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA. NR 87 TC 27 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 2001 VL 122 IS 6 BP 2993 EP 3016 PG 24 SC Astronomy & Astrophysics GA 505TT UT ISI:000172932200015 ER PT J AU Curiel, S Trinidad, MA Canto, J Rodriguez, LF Torrelles, JM Ho, PTP Patel, NA Greenhill, L Gomez, JF Garay, G Hernandez, L Contreras, ME Anglada, G TI Detection of a candidate for the exciting source of the expanding water maser bubble in Cepheus A SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (Cepheus A); ISM : jets and outflows; radio continuum : ISM; stars : formation ID THERMAL RADIO JET; A HW2 AB We report sensitive, high angular resolution VLA 3.6 cm and 7 mm continuum observations toward the star-forming region Cepheus A. Three embedded young stellar objects (YSOs) were found within a projected area of similar or equal to 0".6 x 0".6 (400x400 AU(2)). One of the sources is the already known radio continuum jet HW2 (detected at 3.6 cm and 7 mm), while the other two weak sources were not previously known. One of these two new sources is detected only at 7 mm and is located similar or equal to0".15 south from HW2. The other source, detected only at 3.6 cm, is located 0".6 south from HW2 and nearly coincides with the center of the enigmatic expanding bubble of water masers recently detected with the Very Long Baseline Array. We suggest that this radio continuum source is the embedded YSO powering the water maser structure, but its nature is still unknown at present. We also discuss possible scenarios that could explain the surprisingly precise spherical geometry of the water maser bubble. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Lab Astrofis Espacial & Fis Fundamental INTA, E-28080 Madrid, Spain. Univ Chile, Dept Astron, Santiago, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Curiel, S, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico. NR 12 TC 14 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 2002 VL 564 IS 1 PN Part 2 BP L35 EP L38 PG 4 SC Astronomy & Astrophysics GA 509NT UT ISI:000173154400009 ER PT J AU Pena, JH Paparo, M Peniche, R Rodriguez, M Hobart, MA De la Cruz, C Garcia-Cole, A TI Physical parameter determination of the delta Scuti star V1719 Cygni SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article ID RR LYRAE STARS; EMPIRICAL CALIBRATIONS; UVBY PHOTOMETRY; BETA PHOTOMETRY; PRAESEPE; SYSTEMS; GRIDS AB New uvbybeta photoelectric photometry of the short-period variable star V1719 Cygni (HD 200925) has been secured. A period analysis of these data and those reported in the literature has provided us with stable pulsation frequencies that fit all the available observations covering a time span of 20 yr. The frequencies determined are 3.7411556, 7.4823111, 11.2234667, and 4.6777749 cycles day(-1) and of smaller amplitude 8.4189900 cycles day(-1). It was found that this Population I star has around 3.1 and an effective temperature log g of 6750 K. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Hungarian Acad Sci, Konkoly Observ, H-1525 Budapest, Hungary. Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico. Univ Veracruzana, Xalapa 91090, Veracruz, Mexico. Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Colegio Ciencias & Humanidades Sur, Mexico City 04510, DF, Mexico. RP Pena, JH, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico. NR 38 TC 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD FEB PY 2002 VL 114 IS 792 BP 214 EP 223 PG 10 SC Astronomy & Astrophysics GA 517EJ UT ISI:000173597900011 ER PT J AU Posadas, A Morales, J Vidal, F Sotolongo-Costa, O Antoranz, JC TI Continuous time random walks and south Spain seismic series SO JOURNAL OF SEISMOLOGY LA English DT Article DE Levy flight; self-organised criticality; seismicity ID SELF-ORGANIZED CRITICALITY; TEMPORAL ANALYSIS; EARTHQUAKES; MODEL; DYNAMICS; FAULT AB Levy flights were introduced through the mathematical research of the algebra or random variables with infinite moments. Mandelbrot recognized that the Levy flight prescription had a deep connection to scale-invariant fractal random walk trajectories. The theory of Continuous Time Random Walks (CTRW) can be described in terms of Levy distribution functions and it can be used to explain some earthquake characteristics like the distribution of waiting times and hypocenter locations in a seismic region. This paper checks the validity of this assumption analyzing three seismic series localized in South Spain. The three seismic series (Alboran, Antequera and Loja) show qualitatively the same behavior, although there are quantitative differences between them. C1 Univ Almeria, Dept Fis Aplicada, Almeria, Spain. Inst Andaluz Geofis, Granada, Spain. Minist Fomento, Inst Geog Nacl, Madrid, Spain. Univ La Habana, Dept Fis Teor, Havana, Cuba. UNED, Dept Fis Matemat & Fluidos, Madrid, Spain. RP Posadas, A, Univ Almeria, Dept Fis Aplicada, Almeria, Spain. NR 38 TC 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1383-4649 J9 J SEISMOL JI J. Seismol. PD JAN PY 2002 VL 6 IS 1 BP 61 EP 67 PG 7 SC Geochemistry & Geophysics GA 524BC UT ISI:000173991200005 ER PT J AU Larsen, SS Efremov, YN Elmegreen, BG Alfaro, EJ Battinelli, P Hodge, PW Richtler, T TI Hubble Space Telescope imaging of a peculiar stellar complex in NGC 6946 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : individual (NGC 6946); galaxies : star clusters; galaxies : stellar content ID SPIRAL GALAXY NGC-6946; LARGE-MAGELLANIC-CLOUD; STAR-FORMATION HISTORY; H-II REGIONS; NEARBY GALAXIES; LOCAL GROUP; MOLECULAR CLOUDS; INFRARED OBSERVATIONS; RADIAL-DISTRIBUTION; GLOBULAR-CLUSTER AB The stellar populations in a stellar complex in NGC 6946 are analyzed on images taken with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The complex is peculiar because of its very high density of stars and clusters and semicircular shape. Its physical dimensions are about the same as for the local Gould Belt, but the stellar density is 1-2 orders of magnitude higher. In addition to an extremely luminous, similar to15 Myr old cluster discussed in an earlier paper, accounting for about 17% of the integrated V-band light, we identify 18 stellar clusters within the complex with luminosities similar to the brightest open clusters in the Milky Way. The color-magnitude diagram of individual stars in the complex shows a paucity of red supergiants compared to model predictions in the 10-20 Myr age range for a uniform star formation rate. We thus find tentative evidence for a gap in the dispersed star formation history, with a concentration of star formation into a young globular cluster during this gap. Confirmation of this result must, however, await a better understanding of the late evolution of stars in the corresponding mass range (greater than or similar to12 M.). A reddening map based on individual reddenings for 373 early-type stars is presented, showing significant variations in the absorption across the complex. These may be responsible for some of the arclike structures previously identified on ground-based images. We finally discuss various formation scenarios for the complex and the star clusters within it. C1 Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119899, Russia. IBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Osserv Astron Roma, I-00136 Rome, Italy. Univ Washington, Dept Astron, Seattle, WA 98195 USA. Concepcion Univ, Dept Fis, Astron Grp, Concepcion, Chile. RP Larsen, SS, Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. NR 81 TC 21 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 2002 VL 567 IS 2 PN Part 1 BP 896 EP 914 PG 19 SC Astronomy & Astrophysics GA 527WF UT ISI:000174210400019 ER PT J AU Poretti, E Koen, C Bossi, M Rodriguez, E Martin, S Krisciunas, K Akan, MC Crowe, R Wilcox, M Ibanoglu, C Evren, S TI The multiperiodicity of the gamma Doradus stars HD 224945 and HD 224638 as detected from a multisite campaign SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE methods : data analysis; stars : oscillations; stars : variables : general; techniques : photometric ID F-TYPE STARS; PULSATIONS; VARIABLES; PHOTOMETRY AB We discuss new photometric data collected on the gamma Dor variables HD 224945 and HD 224638. Multiperiodicity was detected in both stars, thanks to the clear spectral window of a multisite campaign that involved five observatories. HD 224945 shows the shortest period among the gamma Dor stars, i.e., 0.3330 d. The pulsation behaviour is very different: HD 224945 displays a set of frequencies spread over an interval much larger than that of HD 224638. We clearly found evidence for amplitude variations in the excited modes by comparing data from different years. HD 224945 and HD 224638 are among the best examples of gamma Dor stars that show multimode pulsations, which make them very interesting from an asteroseismological point of view. C1 Osserv Astron Brera, I-23807 Merate, Italy. S African Astron Observ, ZA-7935 Cape Town, South Africa. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Cerro Tololo Interamer Observ, La Serena, Chile. Ege Univ, Fac Sci, Dept Astron & Space Sci, TR-35100 Izmir, Turkey. Univ Hawaii, Dept Phys & Astron, Hilo, HI 96720 USA. RP Poretti, E, Osserv Astron Brera, Via Bianchi 46, I-23807 Merate, Italy. NR 21 TC 7 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2002 VL 384 IS 2 BP 513 EP 520 DI 10.1051/0004-6361:20020068 PG 8 SC Astronomy & Astrophysics GA 528PW UT ISI:000174253000016 ER PT J AU Abdelmassih, V Balmaceda, JP Tesarik, J Abdelmassih, R Nagy, ZP TI Relationship between time period after vasectomy and the reproductive capacity of sperm obtained by epididymal aspiration SO HUMAN REPRODUCTION LA English DT Article DE epididymal sperm; implantation rate; pregnancy rate; time from vasectomy ID IN-VITRO FERTILIZATION; TESTICULAR SPERMATOZOA; INJECTION ICSI; FEMALE AGE; MEN; INFERTILITY; IMPLANTATION; MOTILITY; QUALITY; OOCYTE AB BACKGROUND: It is not well defined whether the elapsed time after vasectomy has any influence on the outcome of IVF-ICSI using epididymal sperm. We analysed retrospectively the results of 151 ICSI cycles in which sperm of vasectomized men were used at different time periods after vasectomy. METHODS: Oocytes were obtained after a desensitizing ovarian stimulation protocol using GnRH agonist in association with recombinant FSH and HCG. Sperm were retrieved by percutaneous epididymal sperm aspiration. The cycles were split into three groups: less than or equal to10 years after vasectomy (group 1, n = 47), 11-19 years after vasectomy (group 2, n = 79), and greater than or equal to20 years after vasectomy (group 3, n = 25). RESULTS: As might be expected, the mean age of men differed in the three groups (group 3 > group 2 > group 1), and the mean age of the women was also significantly higher in group 3 than in groups 1 and 2, although no differences were described between groups 2 and 3. All other laboratory and clinical parameters were similar in the three groups. Ongoing pregnancy and implantation rates (34, 25, 8% and 22, 15, 6% respectively) decreased significantly from group 1 to group 3. CONCLUSION: Pregnancy and implantation rates after ICSI with sperm from vasectomized men are negatively correlated with the time interval from vasectomy, which cannot be explained purely by male or female ageing. C1 Clin & Ctr Pesquisa Reprod Humana Roger Abdelmass, BR-01433000 Sao Paulo, Brazil. Mar&Gen, Granada, Spain. RP Nagy, ZP, Clin & Ctr Pesquisa Reprod Humana Roger Abdelmass, Rua Maestro Elias Lobo 805,Jardim Paulista, BR-01433000 Sao Paulo, Brazil. NR 28 TC 13 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0268-1161 J9 HUM REPROD JI Hum. Reprod. PD MAR PY 2002 VL 17 IS 3 BP 736 EP 740 PG 5 SC Obstetrics & Gynecology; Reproductive Biology GA 531PQ UT ISI:000174424600033 ER PT J AU Robles, AB Allegretti, LI Passera, CB TI Coronilla juncea is both a nutritive fodder shrub and useful in the rehabilitation of abandoned Mediterranean marginal farmland SO JOURNAL OF ARID ENVIRONMENTS LA English DT Article DE Coronilla juncea; semi-arid; Mediterranean fodder shrub; allometric relationships; digestibility; seed germination ID SEED-GERMINATION; INGESTION; DISPERSAL; MAMMALS; DEER AB Coronilla juncea is a leguminous shrub native to semi-arid regions of the Mediterranean Basin, particularly south-eastern Spain, and is browsed by livestock such as sheep and goats. We provide here information about this source of forage: allometric regression equations (phytovolume vs. total and forage phytomass), nutritive value and seed germination. The regression equations calculated were highly significant (r(2)=0.86 for volume/total phytomass and 0.93 for volume/forage phytomass, p<0.001). The values recorded for the in vitro digestibility of dry matter and organic matter were 65.93% and 62.13%, respectively. The optimum temperature for seed germination was 10&DEG;C. Scarification in goat rumen for 24h increased the overall germination rate of fruit with pericarp although in sheep rumen overall germination decreased slightly. We suggest that this fodder shrub be included in programmes for land management and the rehabilitation of degraded semi-arid-to-arid ecosystems. (C) 2002 Elsevier Science Ltd. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Consejo Nacl Invest Cient & Tecn, Inst Argentino Invest Zonas Aridas, RA-5500 Mendoza, Argentina. RP Robles, AB, CSIC, Estac Expt Zaidin, POB 419, E-18008 Granada, Spain. NR 59 TC 1 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0140-1963 J9 J ARID ENVIRON JI J. Arid. Environ. PD MAR PY 2002 VL 50 IS 3 BP 381 EP 392 DI 10.1006/jare.2001.0913 PG 12 SC Ecology; Environmental Sciences GA 542QG UT ISI:000175055400002 ER PT J AU Marti, J Mirabel, IF Rodriguez, LF Smith, IA TI Radio images of the microquasar GRS 1758-258 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : individual : GRS 1758-258; stars : winds, outflows ID GRS-1758-258; COUNTERPART AB We present sensitive images of the microquasar GRS 1758-258 at two different radio wavelengths. The positions, flux densities and spectral indices of the central source and the extended radio lobes are reported. Our results confirm the synchrotron nature of the radio lobes. We also present a very deep radio image of the jet flow at arcminute scales. The source VLA-C, previously proposed as the exciting source of the system, is found to coincide with the Chandra position. C1 Univ Jaen, Escuela Politecn Super, Dept Fis, Jaen, Spain. CSIC, Inst Astrofis Andalucia, Granada, Spain. Ctr Etud Saclay, Serv Astrophys, CEA, DSM,DAPNIA, F-91191 Gif Sur Yvette, France. Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. RP Marti, J, Univ Jaen, Escuela Politecn Super, Dept Fis, Virgen Cabeza 2, Jaen, Spain. NR 16 TC 11 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2002 VL 386 IS 2 BP 571 EP 575 DI 10.1051/0004-6361:20020273 PG 5 SC Astronomy & Astrophysics GA 543YX UT ISI:000175132400017 ER PT J AU Brom, S Girard, L Garcia-de los Santos, A Sanjuan-Pinilla, JM Olivares, J Sanjuan, J TI Conservation of plasmid-encoded traits among bean-nodulating Rhizobium species SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID PHASEOLUS-VULGARIS L; LEGUMINOSARUM BIOVAR PHASEOLI; SYMBIOTIC PLASMID; ETLI; PERFORMANCE; TRANSPOSON; REPLICONS; NODULES; REGION; GENES AB Rhizobium etli type strain CFN42 contains six plasmids. We analyzed the distribution of genetic markers from some of these plasmids in bean-nodulating strains belonging to different species (Rhizobium etli, Rhizobium gallicum, Rhizobium giardinii, Rhizobium leguminosarum, and Sinorhizobium fredii). Our results indicate that independent of geographic origin, R. etli strains usually share not only the pSym plasmid but also other plasmids containing symbiosis-related genes, with a similar organization. In contrast, strains belonging to other bean-nodulating species seem to have acquired only the pSym plasmid from R. etli. C1 UNAM, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca, Morelos, Mexico. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, E-18008 Granada, Spain. RP Brom, S, UNAM, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Ap P 565-A, Cuernavaca, Morelos, Mexico. NR 29 TC 14 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROBIOL JI Appl. Environ. Microbiol. PD MAY PY 2002 VL 68 IS 5 BP 2555 EP 2561 DI 10.1128/AEM.68.5.2555-2561-2002 PG 7 SC Biotechnology & Applied Microbiology; Microbiology GA 548UB UT ISI:000175407300059 ER PT J AU Franco, J Kim, J Alfaro, EJ Hong, SS TI The Parker instability in three dimensions: Corrugations and superclouds along the Carina-Sagittarius arm SO ASTROPHYSICAL JOURNAL LA English DT Article DE Galaxy : kinematics and dynamics; Galaxy : structure; ISM : clouds; ISM : magnetic fields; ISM : structure MHD ID GALACTIC MAGNETIC-FIELD; H-II REGIONS; STAR-FORMATION; MOLECULAR CLOUD; INNER GALAXY; DISKS; DENSITY; EQUILIBRIUM; EVOLUTION; COMPLEXES AB Here we present three-dimensional MHD models for the Parker instability in a thick magnetized disk, including the presence of a spiral arm. The B field is assumed parallel to the arm, and the model results are applied to the optical segment of the Carina-Sagittarius arm. The characteristic features of the undular and interchange modes are clearly apparent in the simulations. The interchange mode appears first and generates small interstellar structures in the interarm regions, but its development inside the arm is hampered by the acceleration of the spiral wave. In contrast, the undular mode follows its normal evolution inside the spiral wave, creating large gas concentrations distributed along the arm. This results in a clear arm/interarm difference; the instability triggers the formation of large interstellar clouds ( with masses in the range of 10(6)-10(7) M-circle dot) inside the arms but generates only small structures with slight density enhancements in the interarm regions. The resulting clouds are distributed in an antisymmetric way with respect to the midplane, and their masses are similar to those inferred for H I superclouds in our Galaxy. Such a cloud distribution results in an azimuthal corrugation along the arm, and for conditions similar to those of the optical segment of the Carina-Sagittarius arm, it has a wavelength of about 2.4 kpc. This structuring, then, can explain the origin of both H I superclouds and the azimuthal corrugations in spiral arms. In particular, the wavelength of the fastest growing undular mode matches the corrugation length derived with the young stellar groups located in the optical segment of the Carina-Sagittarius arm. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Korea Astron Observ, Taejon 305348, South Korea. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Seoul Natl Univ, Dept Astron, Seoul 151742, South Korea. RP Franco, J, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264,Cd Univ, Mexico City 04510, DF, Mexico. NR 56 TC 14 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2002 VL 570 IS 2 PN Part 1 BP 647 EP 655 PG 9 SC Astronomy & Astrophysics GA 550WJ UT ISI:000175527100015 ER PT J AU Anglada, G Rodriguez, LF TI VLA detection of the exciting sources of the molecular outflows associated with L1448 IRS2, IRAS 05327+3404, L43, IRAS 22142+5206, L1211, and IRAS 23545+6508 SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE ISM : jets and outflows; stars : formation; stars : mass loss; radio continuum : stars ID PROTOPLANETARY NEBULA CANDIDATES; YOUNG STELLAR OBJECTS; AMMONIA OBSERVATIONS; BIPOLAR-OUTFLOW; DENSE CORES; CO OUTFLOW; STARS; IRAS-23545+6508; PROTOSTAR; REGIONS AB We present, sensitive very large array observations at 3.6 cm of nine fields containing molecular outflows. We detected candidates for the exciting sources of the molecular outflows in six of the fields: L1448 IRS2, IRAS 05327+3404, L43, IRAS 22142+5206, L1211, and IRAS 23545+6508. We discuss the parameters of these sources, as well as their relation with sources detected at other wavelengths. C1 CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. UNAM, Astron Inst, Morelia 58090, Michoacan, Mexico. RP Anglada, G, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. NR 37 TC 5 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD APR PY 2002 VL 38 IS 1 BP 13 EP 21 PG 9 SC Astronomy & Astrophysics GA 555CV UT ISI:000175776500002 ER PT J AU Luridiana, V Esteban, C Peimbert, M Peimbert, A TI Chemical abundances of NGC 5461 and NGC 5471 derived from echelle spectrophotometry SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE HII regions; ISM : abundances; ISM : individual (NGC 5461, NGC 5471) ID H-II REGIONS; TEMPERATURE-FLUCTUATIONS; HELIUM ABUNDANCE; LINE-INTENSITIES; HYDROGENIC IONS; HII-REGIONS; NEBULAE; DENSITY; GALAXIES; CLUSTER AB We present high resolution spectroscopic data of the two giant extragalactic H II regions NGC 5461 and NGC 54 71 in M101, which have been obtained with the 2.1-m telescope of the Observatorio Astronomico Nacional in San Pedro Martir, Baja California. We measured the intensities of several H and He recombination lines, and of forbidden lilies of a large number of ions. We calculate the physical conditions in the, two nebulae with a large number of diagnostics and determine their chemical abundances by applying ionization correction factors (icf's) to the observed ionic abundances. For NGC 5461, the icf's are based on a tailored photoionization model of the region (Luridiana & Peimbert 2001), while for NGC 5471 they are computed from those predicted by a photoionization model of NGC 2363 (Luridiana, Peimbert, & Leitherer 1999), a region which is similar to NGC 5471 in the ionization structure. For both regions, the icf's are compared to those computed following the prescriptions by Mathis & Rosa (1991). Such comparison shows large discrepancies for several elements. including nitrogen, neon, and chlorine. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. RP Luridiana, V, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004,Camino Bajo Huetor 24, E-18080 Granada, Spain. NR 48 TC 9 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD APR PY 2002 VL 38 IS 1 BP 97 EP 109 PG 13 SC Astronomy & Astrophysics GA 555CV UT ISI:000175776500010 ER PT J AU Ueda, Y Yamaoka, K Sanchez-Fernandez, C Dhawan, V Chaty, S Grove, JE McCollough, M Castro-Tirado, AJ Mirabel, F Kohno, K Feroci, M Casella, P Trushkin, SA Castaneda, H Rodriguez, J Durouchoux, P Ebisawa, K Kotani, T Swank, J Inoue, H TI Study of the largest multiwavelength campaign of the microquasar GRS 1915+105 SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; black hole physics; infrared : stars; radio continuum : stars; stars : individual (GRS 1915+105); X-rays : individual ( GRS 1915+105) X-rays : stars ID SUPERLUMINAL SOURCE GRS-1915+105; BLACK-HOLE CANDIDATES; RAY TIMING EXPLORER; X-RAY; RELATIVISTIC JETS; INFRARED FLARES; RADIO-EMISSION; PERFORMANCE; OUTBURST; GALAXY AB We present the results from a multiwavelength campaign of GRS 1915+105 performed from 2000 April 16 to April 25. This is one of the largest coordinated set of observations ever performed for this source, covering the wide energy band in radio (13.3-0.3 cm), near-infrared (J, H, and K bands), X-rays, and gamma rays (from 1 keV to 10 MeV). During the campaign GRS 1915+105 was predominantly in the plateau (or low/hard) state but sometimes showed soft X-ray oscillations: before April 20.3, rapid, quasi-periodic (similar or equal to45 minutes) flare-dip cycles were observed. In the spectral energy distribution in the plateau state, optically thick synchrotron emission and Comptonization is dominant in the radio and X- to gamma-ray bands, respectively. The small luminosity in the radio band relative to that in X-rays indicates that GRS 1915+105 falls in the regime of "radio-quiet" microquasars. In three epochs we detected faint flares in the radio or infrared bands with amplitudes of 10-20 mJy. The radio flares observed on April 17 shows frequency-dependent peak delay, consistent with an expansion of synchrotron-emitting region starting at the transition from the hard-dip to the soft-flare states in X-rays. On the other hand, infrared flares on April 20 appear to follow (or precede) the beginning of X-ray oscillations with an inconstant time delay of similar or equal to5-30 minutes. This implies that the infrared-emitting region is located far from the black hole by greater than or similar to10(13) cm, while its size is less than or similar to10(12) cm constrained from the time variability. We find a good correlation between the quasi-steady flux level in the near-infrared band and in the X-ray band. From this we estimate that the reprocessing of X-rays, probably occurring in the outer parts of the accretion disk, accounts for about 20%-30% of the observed K magnitude in the plateau state. The OSSE spectrum in the 0.05-10 MeV band is represented by a single power law with a photon index of 3.1 extending to similar to1 MeV with no cutoff. We can model the combined GIS-PCA-HEXTE spectra covering 1 200 keV by a sum of the multicolor disk model, a broken power law modified with a high-energy cutoff, and a reflection component. The power-law slope above similar to30 keV is found to be very similar between different states in spite of large flux variations in soft X- rays, implying that the electron energy distribution is not affected by the change of the state in the accretion disk. C1 Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan. RIKEN, Inst Phys & Chem Res, Wako, Saitama 35101, Japan. INTA, LAEFF, Madrid, Spain. Natl Radio Astron Observ, Charlottesville, VA 22903 USA. Open Univ, Dept Phys & Astron, Milton Keynes, Bucks, England. USN, Res Lab, Washington, DC 20375 USA. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. CSIC, IAA, Granada, Spain. Serv Astrophys, Saclay, France. Consejo Nacl Invest Cient & Tecn, IAFE, RA-1033 Buenos Aires, DF, Argentina. NAO, Nobeyama Radio Observ, Nagano, Japan. Univ Tokyo, Inst Astron, Tokyo 113, Japan. CNR, Ist Astrofis Spaziale, I-00185 Rome, Italy. SAO, St Petersburg, Russia. Observ Astron Nacl Mexico, Mexico City, DF, Mexico. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RP Ueda, Y, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan. NR 73 TC 22 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 1 PY 2002 VL 571 IS 2 PN Part 1 BP 918 EP 935 PG 18 SC Astronomy & Astrophysics GA 556CB UT ISI:000175830800029 ER PT J AU Luridiana, V Cervino, M Binette, L TI Can stellar winds account for temperature fluctuations? The case of NGC 2363 SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE HII regions; ISM : individual (NGC 2366, NGC 2363); stars : clusters ID MODELS C1 European So Observ, D-8046 Garching, Germany. CSIC, Inst Astrofis Andalucia, Granada, Spain. Max Planck Inst Extraterr Phys, D-8046 Garching, Germany. UNAM, Inst Astron, Mexico City, DF, Mexico. RP Luridiana, V, European So Observ, Karl Schwarzschild Str 2, D-8046 Garching, Germany. NR 7 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2002 VL 281 IS 1-2 BP 323 EP 324 PG 2 SC Astronomy & Astrophysics GA 557RG UT ISI:000175921200069 ER PT S AU Torrelles, JM Rodriguez, LF Anglada, G TI Twin, aligned protoplanetary disks around the components of the young binary system L1551 IRS5 SO FORMATION OF BINARY STARS SE IAU SYMPOSIA LA English DT Article ID OUTFLOW AB VLA 7 mm continuum observations carried out by Rodriguez et al. (1998) with 0.06" resolution toward L1551 IRS5 have shown two resolved dust sources. Both sources are elongated with almost the same orientation, similar flux densities, and similar angular sizes, being interpreted by these authors as a system of twin, aligned protoplanetary disks of 10 AU radius around the components of a young binary of 50 AU separation. These protoplanetary disks, the smaller ones ever imaged at mm wavelengths, are about a factor of ten smaller than disks around isolated stars, but have enough mass to form solar systems similar to our own. The fact that the disks are aligned with each other argues in favor for long-lived planetary systems in this binary. We all look forward to the future development of interferometers such as the EVLA, SMA, and ALMA in order to characterize the physical conditions of these associated protoplanetary disks by detecting spatially resolved molecular line emission. With these upcoming interferometers it will be possible to make great strides forward in our knowledge of the star formation processes. C1 CSIC, IEEC, ES-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, ES-08034 Barcelona, Spain. UNAM, Astron Inst, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Torrelles, JM, CSIC, IEEC, Gran Capita 2, ES-08034 Barcelona, Spain. NR 14 TC 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA SN 0074-1809 J9 IAU SYMP PY 2001 IS 200 BP 132 EP 135 PG 4 SC Astronomy & Astrophysics GA BU43W UT ISI:000175996700016 ER PT J AU Lopez-Martin, L Lopez, JA Esteban, C Vazquez, R Raga, A Torrelles, JM Miranda, LF Meaburn, J Olguin, L TI Unveiling the structure of the planetary nebula M 2-48: Kinematics and physical conditions SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : jets and outflows; hydrodynamics; shock waves; planetary nebulae : individual : M 2-48 ID LONG-SLIT SPECTROSCOPY; RECOMBINATION COEFFICIENTS; COLLIMATED OUTFLOWS; LINE-INTENSITIES; HE-I; BIPOLAR; MODELS; JETS; EVOLUTION; DISCOVERY AB The kinematics and physical conditions of the bipolar planetary nebula M 2-48 are analysed from high and low dispersion long-slit spectra. Previous CCD narrow-band optical observations have suggested that this nebula is mainly formed by a pair of symmetric bow-shocks, an off-center semi-circular shell, and an internal bipolar structure. The bipolar outflow has a complex structure, characterised by a series of shocked regions located between the bright core and the polar tips. There is an apparent kinematic discontinuity between the bright bipolar core and the outer regions. The fragmented ring around the bright bipolar region presents a low expansion velocity and could be associated with ejection in the AGB-PN transition phase, although its nature remains unclear. The chemical abundances of the central region are derived, showing that M 2-48 is a type I planetary nebula (PN). C1 Inst Astrofis Canarias, Tenerife 38200, Spain. Observ Paris, DEMIRM, CNRS, UMR 8540, F-75014 Paris, France. UNAM, Inst Astron, Ensenada 22860, Baja California, Mexico. Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. Inst Estudis Espacials Catalunya, Barcelona 08034, Spain. Inst Ciencias Espacio, Barcelona 08034, Spain. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Manchester, Dept Astron, Macclesfield SK11 9DL, Cheshire, England. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Lopez-Martin, L, Inst Astrofis Canarias, C Via Lactea S-N, Tenerife 38200, Spain. NR 33 TC 7 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2002 VL 388 IS 2 BP 652 EP 659 DI 10.1051/0004-6361:20020502 PG 8 SC Astronomy & Astrophysics GA 560UP UT ISI:000176100000035 ER PT J AU Gimenez, C Otto, RF Castilla, N TI Productivity of leaf and root vegetable crops under direct cover SO SCIENTIA HORTICULTURAE LA English DT Article DE Chinese cabbage; beet; spinach; lettuce; crop biomass; leaf area index; microclimate; specific leaf area; floating cover ID ROW COVERS AB A two-year study was conducted to characterise the influence of direct covering, using a spunbonded non-woven polypropylene fabric, on crop productivity of Chinese cabbage, table beet, lettuce and spinach. Air temperature under the cover was higher at the beginning of the cropping season, as compared with open-air growing, but differences decreased throughout the crop cycle. Transmission of PPFD under cover varied from 85 to 65%, depending on dust accumulation on the cover and water vapour condensation in the inner surface of the fabric. Above-ground crop biomass at harvest was not influenced by direct covering (CO) relative to open air (OA) growing conditions. The enhancement of leaf area development, due to the more adequate temperature conditions in CO plots, was compensated by the reduction of the incoming PPFD under CO. Beet root biomass was significantly higher in the CO plots. The larger leaf area index (LAI) and similar values of above-ground biomass under CO indicate a larger production of thinner leaves, reaching significantly higher specific leaf area (SLA) at harvest in the CO cabbage, lettuce and spinach crops, contributing to an important rise in the quality of the marketable product. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Cordoba, Dept Agron, E-14080 Cordoba, Spain. CIDA, Dept Hort, Granada, Spain. Univ Estadual Ponta Grosa, Dept Fitotecnia & Fitosanidade, BR-84010790 Ponta Grossa, Brazil. RP Gimenez, C, Univ Cordoba, Dept Agron, Apartado Correos 3048, E-14080 Cordoba, Spain. NR 20 TC 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-4238 J9 SCI HORT-AMSTERDAM JI Sci. Hortic. PD MAY 20 PY 2002 VL 94 IS 1-2 BP 1 EP 11 PG 11 SC Horticulture GA 561JR UT ISI:000176137300001 ER PT J AU Rienzi, L Nagy, ZP Ubaldi, F Iacobelli, M Anniballo, R Tesarik, J Greco, E TI Laser-assisted removal of necrotic blastomeres from cryopreserved embryos that were partially damaged SO FERTILITY AND STERILITY LA English DT Article DE cryopreservation; embryos; human; laser-assisted hatching; necrotic blastomere removal ID INTRACYTOPLASMIC SPERM INJECTION; INVITRO FERTILIZATION; IN-VITRO; CLOMIPHENE CITRATE; PREGNANCY RATES; ZONA-PELLUCIDA; IMPLANTATION; VIABILITY; DIMETHYLSULFOXIDE; CLEAVAGE AB Objective: To examine whether the developmental potential of embryos that were partially damaged after freezing and thawing can be improved by removal of necrotic blastomeres before embryo transfer. Design: Prospective pilot study and observational clinical series. Setting: Private hospital. Patient(s): Two hundred thirty-five infertile Couples undergoing frozen embryo transfer. Intervention(s): Removal of necrotic blastomeres from frozen-thawed human embryos. Main Outcome Measure(s): Pregnancy and implantation rates. Result(s): Removal of necrotic blastomeres front partially damaged frozen-thawed embryos before transfer increased rates of pregnancy (45.7% vs. 17.1%). ongoing pregnancy (40.0% vs. 11.4%) and ongoing implantation (16.2% vs. 4.3%) compared with the control group, in which necrotic blastomeres were not removed. A similarly high implantation rate (16.7%) was seen a Subsequent clinical series in which necrotic blastomeres were removed from all partially damaged embryos. Conclusion(s): The viability of partially damaged froze with awed embryos can be improved by removal of necrotic blastomeres before embryo transfer. (C) 2002 by American Society for Reproductive Medicine. C1 European Hosp, Ctr Reprod Med, I-00149 Rome, Italy. Clin Reprod Humana, Sao Paulo, Brazil. Androl Ctr John MacLeod, Naples, Italy. MAR&Gen, Mol Assisted Reprod & Genet, Granada, Spain. RP Rienzi, L, European Hosp, Ctr Reprod Med, Via Portuense 700, I-00149 Rome, Italy. NR 29 TC 13 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0015-0282 J9 FERT STERIL JI Fertil. Steril. PD JUN PY 2002 VL 77 IS 6 BP 1196 EP 1201 PG 6 SC Obstetrics & Gynecology; Reproductive Biology GA 562AV UT ISI:000176176000017 ER PT J AU Cruz, MDR Puga, E Aguirre, L Vergara, M Morata, D TI Vermiculite-like minerals in low-grade metasediments from the Coastal Range of central Chile SO CLAY MINERALS LA English DT Article DE Coastal Range; Chile; chlorite; mixed-layer minerals; TEM; vermiculite ID ANALYTICAL ELECTRON-MICROSCOPY; METAMORPHIC VERMICULITE; CHLORITE REACTION; BIOTITE; ILLITE; TRANSMISSION; MECHANISMS AB Mixed-layer minerals with optical properties similar to metamorphic vermiculite were identified in rocks belonging to a Palaeozoic and a Triassic formation separated by an angular unconformity and exposed in the Coastal Range of central Chile. Both formations are affected by low-grade metamorphism. The mixed-layer minerals were studied by optical microscopy, X-ray diffraction (XRD), electron microprobe (EMPA), and transmission/analytical electron microscopy (TEM/AEM). Two types of phyllosilicates were identified: chlorite-vermiculite and mica-chlorite, which are present in the Palaeozoic and Triassic rocks respectively. Chlorite-vermiculite mixed layers form packets with well-defined boundaries and mainly show 1:1 ordered sequences. On the contrary, mica-chlorite mixed layers show, in most cases, random sequences evolving laterally toward chlorite. The AEM data indicate compositions close to that of chlorite in the ternary Si-Al(Fe+Mg+Mn) diagrams for both types of mixed-layer phyllosilicates. Relative to the coexisting chlorite, they have lower (Fe+Mg) contents, and a higher Si/Al ratio. They are interpreted as products of the transformation of chlorite, developed during prograde metamorphism, and probably represent intermediate, metastable phases, in the chlorite to biotite transformation. C1 Univ Malaga, Fac Ciencias, Dept Quim Inorgan Cristalog & Mineral, E-29071 Malaga, Spain. CSIC, Inst Andaluz Ciencias Tierra, Granada 18002, Spain. Univ Chile, Dept Geol, Santiago, Chile. RP Cruz, MDR, Univ Malaga, Fac Ciencias, Dept Quim Inorgan Cristalog & Mineral, E-29071 Malaga, Spain. NR 35 TC 2 PU MINERALOGICAL SOCIETY PI LONDON PA 41 QUEENS GATE, LONDON SW7 5HR, ENGLAND SN 0009-8558 J9 CLAY MINER JI Clay Min. PD JUN PY 2002 VL 37 IS 2 BP 221 EP 234 DI 10.1180/0009855023720029 PG 14 SC Mineralogy GA 571VA UT ISI:000176738800002 ER PT J AU Rodriguez, LF Anglada, G Torrelles, JM Mendoza-Torres, JE Haschick, AD Ho, PTP TI VLA observations of water maser emission associated with SVS 13 and other sources in NGC 1333 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : Herbig-Haro objects; ISM : jets and outflows; masers; stars : pre-main sequence ID HERBIG-HARO OBJECTS; HH 7-11; NGC-1333; STAR; REGION AB The young stellar object SVS 13 is believed to power the chain formed by the HH 7-11 objects. Recent observations have revealed that in the radio continuum (3.6-cm) the source is a binary with components separated by about 0."3 in the east-west direction. The members of the binary are named VLA 4A (western component) and VLA 4B (eastern component). In an attempt to ascertain which of the two components of the binary is the most likely candidate to drive the outflow, we obtained accurate positions for the H2O maser spots toward this source, also known as H2O(A), derived from Very Large Array observations in its highest angular resolution A configuration. We detected a total of eleven spots over four observational sessions (made in the years 1983, 1985, 1988, and 1989). The spots are segregated in two velocity groups: a velocity group with v(LSR) similar to that of the ambient cloud (v(LSR) similar or equal to 8 km s(-1)), for which we detected five features (with v(LSR) in the range of 6.5 to 12.2 km s(-1)) and a blueshifted velocity group (six features with vLSR in the range of -25.4 to 5.6 km s(-1)). Remarkably, all the spots in the first velocity group are associated with VLA 4A, while all the spots in the blueshifted velocity group are associated with VLA 4B. We discuss the possible implications of this observation. We also present accurate positions of the H2O maser HH 7(B) and of the masers associated with IRAS4B (VLA 28) and IRAS7 (VLA 27, the exciting source of HH 6). C1 UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, IEEC, ES-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, ES-08034 Barcelona, Spain. Inst Nacl Astrofis Opt & Electr, Puebla 72840, Mexico. MIT, Haystack Observ, Westford, MA 01886 USA. RP Rodriguez, LF, UNAM, Inst Astron, Campus Morelia,Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico. NR 28 TC 7 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2002 VL 389 IS 2 BP 572 EP 576 DI 10.1051/0004-6361:20020619 PG 5 SC Astronomy & Astrophysics GA 573EW UT ISI:000176817200028 ER PT J AU Efremov, YN Pustilnik, SA Kniazev, AY Elmegreen, BG Larsen, SS Alfaro, EJ Hodge, PW Pramsky, AG Richtler, T TI 6-m telescope spectroscopic observations of the bubble complex in NGC 6946 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : ISM; galaxies : globular clusters : general; galaxies : formation; galaxies : individual : NGC6946; ISM : bubbles ID SPIRAL GALAXY NGC-6946; YOUNG GLOBULAR-CLUSTER; STAR-FORMATION HISTORY; IONIZED-GAS; INTERSTELLAR-MEDIUM; SUPERNOVA-REMNANTS; DWARF GALAXIES; EVOLUTION; ABUNDANCES; EMISSION AB We describe the results of a long-slit spectroscopic study of an unusual star complex in the nearby spiral galaxy NGC 6946 using the SAO 6 m telescope and the Keck 10 m telescope. The complex resembles a circular bubble 600 pc in diameter with a young super star cluster (SSC) near the center. The kinematics of ionized gas is studied through Halpha emission with several slit positions. Position-velocity diagrams show two distinct features with high speed motions. One is an irregularly shaped region to the east of the SSC, 270 pc in size, in which most of the Halpha emission is blue shifted by 120 km s(-1), and another is a 350 pc shell centered on the SSC with positive and negative velocity shifts of 60 km s(-1). Balmer and He I absorption lines in the SSC give an age of 12-13 Myr, which is consistent with the photometric age but significantly older than the kinematic ages of the high speed regions. The energetics of the SSC and its interaction with the environment are considered. The expansion energies exceed 10(52) ergs, but the power outputs from winds and supernova in the SSC are large enough to account for this. The intensities of Balmer, [N II], and [S II] emission lines within and around the complex indicate that shock excitation makes a significant contribution to the emission from the most energetic region. C1 Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119899, Russia. RAS, Special Astrophys Observ, Circassia 369167, Russia. Isaac Newton Inst Chile, SAO Branch, St Petersburg, Russia. Max Planck Inst Astron, D-69117 Heidelberg, Germany. TJ Watson Res Ctr, IBM Res Div, Yorktown Hts, NY 10598 USA. Univ Calif Santa Cruz, UC Observ, Lick Observ, Santa Cruz, CA 95064 USA. Inst Astrofis Andalucia, Granada 18008, Spain. Univ Washington, Seattle, WA 98195 USA. Concepcion Univ, Dept Fis, Astron Grp, Concepcion, Chile. RP Efremov, YN, Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Univ Prospect 13, Moscow 119899, Russia. NR 50 TC 13 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2002 VL 389 IS 3 BP 855 EP 870 DI 10.1051/0004-6361:20020721 PG 16 SC Astronomy & Astrophysics GA 574FL UT ISI:000176877800016 ER PT J AU Reipurth, B Rodriguez, LF Anglada, G Bally, J TI Radio continuum maps of deeply embedded protostars: Thermal jets, multiplicity, and variability SO ASTRONOMICAL JOURNAL LA English DT Article DE binaries : general; ISM : jets and outflows; radio continuum; stars : formation; stars : pre-main-sequence ID HARO ENERGY-SOURCES; YOUNG STELLAR OBJECTS; SMALL-SCALE STRUCTURE; EXCITING SOURCES; STAR-FORMATION; VLA DETECTION; MOLECULAR OUTFLOWS; NGC-1333 IRAS-4; BIPOLAR OUTFLOW; BINARY-SYSTEM AB We have carried out a deep, 3.6 cm radio continuum survey of young outflow sources using the Very Large Array in its A configuration providing subarcsecond resolution. The seven regions observed are L1448-N, IRAS 2 and 4 in NGC 1333, L1551-NE, SSV 63 in L1630, HH 124 IRS in NGC 2264, and B335 IRS. The first three of these objects are known from submillimeter observations to be multiple sources, and we detect almost all known submillimeter components at 3.6 cm. The L1551-NE source is confirmed to be a subarcsecond binary. We find a third radio source in the SSV 63 system, which drives the multiple HH 24 jets. HH 124 IRS is embedded in a cometary cloud, where we detect a small cluster of six time-variable radio continuum sources. Six of the observed sources are resolved into compact thermal radio jets. C1 Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. UNAM, Astron Inst, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA. RP Reipurth, B, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA. NR 79 TC 35 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD AUG PY 2002 VL 124 IS 2 BP 1045 EP 1053 PG 9 SC Astronomy & Astrophysics GA 574KQ UT ISI:000176888900031 ER PT J AU Manning-Cela, R Gonzalez, A Swindle, J TI Alternative splicing of LYT1 transcripts in Trypanosoma cruzi SO INFECTION AND IMMUNITY LA English DT Article ID PRE-MESSENGER-RNA; INTERGENIC REGIONS; POLYADENYLATION; BRUCEI; GENE; SITE AB As a result of alternative trans splicing, three distinct LYT1 mRNAs are produced in Trypanosoma cruzi, two encoding the full-length LYT1 protein and the third encoding a truncated LYT1 protein lacking a possible signal sequence. Analysis of the three mRNAs in different developmental forms of the parasite revealed that the alternative processing events were regulated differently during the parasite life cycle. C1 Infect Dis Res Inst, Seattle, WA 98104 USA. IPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City 07738, DF, Mexico. CSIC, Inst Parasitol & Biomed, Granada, Spain. RP Swindle, J, Infect Dis Res Inst, 1124 Columbia St,Suite 600, Seattle, WA 98104 USA. NR 12 TC 12 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0019-9567 J9 INFEC IMMUNITY JI Infect. Immun. PD AUG PY 2002 VL 70 IS 8 BP 4726 EP 4728 DI 10.1128/IAI.70.8.4726-4728.2002 PG 3 SC Immunology; Infectious Diseases GA 574VC UT ISI:000176909400090 ER PT J AU Calzada, JE Lopez-Nevot, MA Beraun, Y Martin, J TI No evidence for association of the inducible nitric oxide synthase promoter polymorphism with Trypanosoma cruzi infection SO TISSUE ANTIGENS LA English DT Article DE Chagas; inducible nitric oxide synthase; nitric oxide; Peruvian; polymorphism; T. cruzi ID IMMUNE-RESPONSE; MALARIA; GENE; DISEASE; SUSCEPTIBILITY; POPULATION; PROTECTION; PARASITE; REGION; NOS2A AB The purpose of the present study was to address the possible contribution of the (CCTTT)(n) microsatellite polymorphism in the NOS2 promoter region to the susceptibility to chronic Trypanosoma cruzi infection and to Chagas' disease related cardiomyopathy. We determined the (CCTTT)(n) genotypes in a sample of 76 serologically positive chagasic individuals and in 78 healthy controls. No statistically significant differences were observed between total chagasic patients and healthy controls with regard to frequency of the (CCTTT)(n) microsatellite repeat of any given length. Likewise, we found no differences in the distribution of the (CCTTT)(n) microsatellite repeats between seropositives without manifestations of the disease and those with chagasic cardiomyopathy. Our data suggest that the NOS2 promoter pentanucleotide microsatellite polymorphisms analyzed do not play a major role in the pathogenesis of chronic T. cruzi infection in this Peruvian sample. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Hosp Virgen Neyes, Serv Immunol, Granada, Spain. Hosp Nacl Guiliermo Almenara, Dept Patol Clin, Lima, Peru. RP Martin, J, CSIC, Inst Parasitol & Biomed Lopez Neyra, C Ventanilla 11, Granada 18001, Spain. NR 20 TC 5 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0001-2815 J9 TISSUE ANTIGEN JI Tissue Antigens PD APR PY 2002 VL 59 IS 4 BP 316 EP 319 PG 4 SC Cell Biology; Immunology; Pathology GA 575AW UT ISI:000176924200011 ER PT J AU Rubio, R Borie, F Schalchli, C Castillo, C Azcon, R TI Plant growth responses in natural acidic soil as affected by arbuscular mycorrhizal inoculation and phosphorus sources SO JOURNAL OF PLANT NUTRITION LA English DT Article ID MINERAL ACQUISITION; PHOSPHATASE-ACTIVITY; ORGANIC PHOSPHORUS; ROOT COLONIZATION; DIFFERENT GENERA; WHITE CLOVER; FUNGI; INFECTION; SORGHUM; HYPHAE AB The effect of arbuscular-mycorrhizal (AM) fungus Glomus etunicatum inoculation in interaction with two sources of phosphorus (P) [soluble P and partially acidulated phosphate rock (pa-PR)] at three rates (17, 43, and 86 kg P ha(-1)) was studied in an acidic natural soil using wheat (Triticum aestivum L.) as host plant. Shoot and root dry biomass, AM colonized root length, macro-micronutrients content and soil phosphatase (P-ase) activity were determined after six months of plant growth. The inoculated G. etunicatum fungus, a fungal strain adapted to the prevailing soil conditions, enhanced plant growth (shoot and root biomass) and mineral acquisition of some elements when plants were fertilized with pa-PR but not with soluble P. The nutrient acquisition by AM inoculated plants varied with the source and amount of applied P. When pa-PR was supplied, the inoculated AM fungus enhanced P, potassium (K), aluminum (Al), and manganese (Mn) plant acquisition in comparison with indigenous endophytes alone. Shoot zinc (Zn) and copper (Cu) uptakes were also enhanced by G. etunicatum inoculation only at the intermediate assayed pa-PR level (43 kg ha(-1)). AM root colonization in the efficient pa-PR treatments, did not relate well to the plant growth and nutrient acquisition in most cases. Nutrients (Ca and Mg) that increased in AM inoculated plants were not those commonly deficient in acidic soils. Nevertheless, some nutrients, which often become limiting under low pH conditions such as P and K were increased by G. etunicatum inoculation plus pa-PR. Changes in rhizospheric soil pH under pa-PR application may be involved in these mycorrhizal effects on nutrient acquisition. The increases in plant biomass as a result of mycorrhizal inoculation do not seem to account for all the changes observed in mineral acquisition. The highest soil P-ase activity was observed at the lowest pa-PR dose showing a negative relationship with P-availability. The inoculation of G. etunicatum was effective in this natural acidic soil in overcoming factors that restrict plant growth and nutrition when pa-PR was applied. C1 Univ La Frontera, Dept Ciencias Quim, Temuco, Chile. CSIC, Estac Expt Zaidin, Dept Biol Suelos & Sistemas Simbiot, E-18008 Granada, Spain. RP Borie, F, Univ La Frontera, Dept Ciencias Quim, POB 54-D, Temuco, Chile. NR 55 TC 4 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 USA SN 0190-4167 J9 J PLANT NUTR JI J. Plant Nutr. PY 2002 VL 25 IS 7 BP 1389 EP 1405 PG 17 SC Plant Sciences GA 575TK UT ISI:000176964400003 ER PT J AU Greve, A Kononen, P Graham, DA Wiik, K Krichbaum, TP Conway, J Rantakyro, R Urpo, S Grewing, M Booth, RS Zensus, JA John, D Navarro, S Mujunen, A Ritakari, J Peltonen, J Sjoman, P Oinaskallio, E Berton, M TI 147 GHz VLBI observations: Detection of 3C273 and 3C279 on the 3100 km baseline Metsahovi-Pico Veleta SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE mm VLBI; galaxies : quasars; galaxies : individual : 3C 273B, 3C 279 AB We report a successful VLBI observation at 147 GHz (2.1 mm) on the 3 100 km long baseline between the telescopes at Metsahovi (Finland) and Pico Veleta (Spain). The sources 3C 273B and 3C 279 were detected with a SNR of similar to 10. For these sources we estimate that 25-30% of the total flux is detectable as correlated flux on the 3 100 km baseline, which gives at 147 GHz a lower limit of the brightness temperature of the inner VLBI jet region of similar to1 x 10(10) K. C1 Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France. Metsahovi Radio Observ, Kylmala 02540, Finland. Max Planck Inst Radioastron, D-53121 Bonn, Germany. Tuorla Observ, Piikkio 21500, Finland. Onsala Space Observ, S-43920 Onsala, Sweden. Univ Chile, Observ Cerro Calan, Santiago, Chile. European So Observ, Santiago 19, Chile. IRAM, Nucl Cent, Granada 18102, Spain. RP Greve, A, Inst Radio Astron Millimetr, 300 Rue Piscine, F-38406 St Martin Dheres, France. NR 6 TC 3 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2002 VL 390 IS 3 BP L19 EP L22 DI 10.1051/0004-6361:20020893 PG 4 SC Astronomy & Astrophysics GA 579MR UT ISI:000177182200002 ER PT J AU Tellez-Gil, L Mansilla-Rosello, A Collado-Torres, A Villar-del-Moral, J Garrote-Lara, D Villegas-Herrera, T Alvarez-Martin, MJ Ferron-Orihuela, JA TI Effect of pretreatment with interleukin-1 beta on inflammatory infiltrates and tissue damage after experimental endotoxic challenge SO CRITICAL CARE MEDICINE LA English DT Article DE endotoxic shock; systemic inflammatory response syndrome; multiple organ dysfunction syndrome; interleukin-1 beta; myeloperoxidase; malondialdehyde ID ORGAN DYSFUNCTION SYNDROME; TUMOR-NECROSIS-FACTOR; INTERCELLULAR-ADHESION MOLECULE-1; RESPONSE SYNDROME; ENDOTHELIAL-CELLS; RECOMBINANT INTERLEUKIN-1; E-SELECTIN; INFECTION; FAILURE; MICE AB Objective: To evaluate the effect of treatment with murine recombinant interleukin-1beta on inflammatory infiltrate and tissue damage after experimental endotoxic challenge. Design: Randomized, controlled study. Setting: Experimental Unit, Virgen de las Nieves University Hospital. Subjects: Seventy-two female CBA/H mice, 20-21 g, supplied by the animal center of the Experimental Unit. Intervention: The mice were randomized into three groups of 24. Group 1 (sham) received two intraperitoneal doses of 0.1 mL of phosphate-buffered saline; group 2 (lipopolysaccharide) was injected with 125 mg/kg lipopolysaccharide (Escherichia coli, intraperitoneally) 24 hrs after 0.1 mL of phosphate-buffered saline; group 3 was pretreated with 80 ng of recombinant interleukin-1beta per mouse (intraperitoneally) 24 hrs before the endotoxic challenge. Measurements and Main Results: At 1, 2, 4, and 24 hrs after the endotoxic challenge, we studied inflammatory infiltrate and tissue damage in lung, liver, and intestine by determining myeloperoxidase and malondialdehyde tissue concentrations. When we compared the pretreated group with the lipopolysaccharide group, myeloperoxidase concentrations decreased significantly in lung (p < .001) and liver (p < .001) at all study times, and in intestine (p < .001) at 2, 4, and 24 hrs; malondialdehyde concentrations significantly decreased in lung at 1 (p < .05), 2 (p < .01), and 24 (p < .001) hrs, in liver at 2 (p < .001), 4 (p < .01), and 24 (p < .001) hrs, and in intestine at 1 (p < .001), 2, 4 (p < .05), and 24 (p < .001) hrs. Conclusion: Pretreatment with recombinant interleukin-1beta significantly reduces inflammatory infiltrate and tissue damage in mouse lung, liver, and intestine after an experimental endotoxic challenge. C1 Hosp Univ Virgen de las Nieves, Ctr Licinio Fuente Sotano, Unidad Cirugia Expt, Granada 18014, Spain. Hosp Univ Virgen de las Nieves, Gen & Digest Surg Dept, Granada 18014, Spain. Univ Los Andes, Sch Med, Dept Microbiol, Merida, Venezuela. RP Mansilla-Rosello, A, Hosp Univ Virgen de las Nieves, Ctr Licinio Fuente Sotano, Unidad Cirugia Expt, Avda Fuerzas Armados 2, Granada 18014, Spain. NR 48 TC 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD AUG PY 2002 VL 30 IS 8 BP 1820 EP 1825 DI 10.1097/01.CCM.0000020981.94183.AA PG 6 SC Critical Care Medicine GA 584GX UT ISI:000177459800025 ER PT J AU Hjorth, J Thomsen, B Nielsen, SR Andersen, MI Holland, ST Fynbo, JU Pedersen, H Jaunsen, AO Halpern, JP Fesen, R Gorosabel, J Castro-Tirado, A McMahon, RG Hoenig, MD Bjornsson, G Amati, L Tanvir, NR Natarajan, P TI The afterglow and complex environment of the optically dim burst GRB 980613 SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; galaxies : high-redshift; galaxies : photometry; gamma rays : bursts; stars : formation ID GAMMA-RAY BURST; STAR-FORMATION; LIGHT CURVES; HOST GALAXY; SUPERNOVA; TELESCOPE; EMISSION; BEPPOSAX; HISTORY; ONBOARD AB We report the identification of the optical afterglow of GRB 980613 in R- and I-band images obtained between 16 and 48 hr after the gamma-ray burst. Early near-infrared (NIR) H and K' observations are also reported. The afterglow was optically faint (R approximate to 23) at discovery but did not exhibit an unusually rapid decay (power-law decay slope alpha < 1 : 8 at 2σ). The optical/NIR spectral index (β(RH) < 1.1) was consistent with the optical-to-X-ray spectral index (beta(RX) approximate to 0.6), indicating a maximal reddening of the afterglow of approximate to0.45 mag in R. Hence, the dimness of the optical afterglow was mainly due to the fairly at spectral shape rather than internal reddening in the host galaxy. We also present late-time Hubble Space Telescope/Space Telescope Imaging Spectrograph images of the field in which GRB 980613 occurred, obtained 799 days after the burst. These images show that GRB 980613 was located close to a very compact, blue V = 26 : 1 object inside a complex region consisting of star-forming knots and/or interacting galaxy fragments. Therefore, GRB 980613 constitutes a strong case for the association of cosmological gamma-ray bursts with star-forming regions. C1 Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. Ctr Adv Study, Oslo, Norway. NORDITA, DK-2100 Copenhagen, Denmark. Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark. Oulu Univ, Div Astron, FIN-90014 Oulu, Finland. Nordic Opt Telescope, E-38700 Santa Cruz de La Palma, Canary Isl, Spain. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. European So Observ, D-85748 Munich, Germany. Univ Oslo, Inst Theoret Astrophys, N-0315 Oslo, Norway. European So Observ, Santiago 19, Chile. Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA. Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. CSIC, IAA, Granada, Spain. INTA, LAEFF, E-28080 Madrid, Spain. Astron Inst, Cambridge CB3 0HA, England. Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland. CNR, Inst Tecnol & Studio Radiazoni Extraterr, I-40129 Bologna, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Yale Univ, Dept Astron, New Haven, CT 06511 USA. RP Hjorth, J, Univ Copenhagen, Astron Observ, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark. NR 65 TC 33 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 2002 VL 576 IS 1 PN Part 1 BP 113 EP 119 PG 7 SC Astronomy & Astrophysics GA 586NB UT ISI:000177589100011 ER PT J AU Vazquez, R Miranda, LF Torrelles, JM Olguin, L Benitez, G Rodriguez, LF Lopez, JA TI Multiwavelength observations of the peculiar planetary nebula IC 2149 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : kinematics and dynamics; planetary nebulae : individual (IC 2149); stars : AGB and post-AGB ID RESOLUTION SPECTRA; KINEMATICS; EVOLUTION; STARS; JETS AB We report high- and low-dispersion spectroscopy, optical imaging, and high-resolution Very Large Array-A lambda3.6 cm continuum observations of the peculiar planetary nebula IC 2149. These observations show that bipolar is a suitable morphological classification for IC 2149. Most nebular material is concentrated in a knotty, bright ring seen edge-on, embedded in an apparently oblate ellipsoidal shell from which remnant or incipient bipolar lobes emerge. We confirm the previously reported depletion in heavy elements and deduce a very low ejected nebular mass less than or similar to0.03 M.. All this information indicates that the formation of IC 2149 is the result of the evolution of a low-mass central star. C1 UNAM, Astron Inst, Ensenada 22800, Baja California, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CSIC, IEEC, Barcelona, Spain. CSIC, Inst Ciencias Espacio, Barcelona, Spain. Natl Autonomous Univ Mexico, Astron Inst, Mexico City 04510, DF, Mexico. UABC, Fac Ciencias, Ensenada 22800, Baja California, Mexico. UNAM, Astron Inst, Morelia 58089, Michoacan, Mexico. RP Vazquez, R, UNAM, Astron Inst, Apartado Postal 877, Ensenada 22800, Baja California, Mexico. NR 33 TC 8 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 10 PY 2002 VL 576 IS 2 PN Part 1 BP 860 EP 869 PG 10 SC Astronomy & Astrophysics GA 590EF UT ISI:000177804800022 ER PT J AU Barucci, MA Boehnhardt, H Dotto, E Doressoundiram, A Romon, J Lazzarin, M Fornasier, S de Bergh, C Tozzi, GP Delsanti, A Hainaut, O Barrera, L Birkle, K Meech, K Ortiz, JL Sekiguchi, T Thomas, N Watanabe, J West, RM Davies, JK TI Visible and near-infrared spectroscopy of the Centaur 32532 (2001 PT13) - ESO large program on TNOs and Centaurs: First spectroscopy results SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE Centaur; 32532 (2001 PT13); visible; near-infrared; spectroscopy; photometry ID CHARGED-PARTICLE IRRADIATION; OUTER SOLAR-SYSTEM; STANDARD STARS; OPTICAL-CONSTANTS; EVOLUTION; COMETS AB We present photometric and spectroscopic data obtained through visible and near-infrared observations of the Centaur 32532 (2001 PT13) performed with FORS1 and ISAAC at the Very Large Telescope (VLT-ESO) within the framework of an ESO large program on the Trans-Neptunian objects (TNOs) and Centaurs. The results show evidence for a difference in the near-infrared spectral behaviour obtained during two observations carried out one month apart. In one spectrum there is the possible presence of signatures of water ice in small amounts. Two models have been proposed to interpret the surface composition of this Centaur. C1 Observ Paris, LESIA, F-92195 Meudon, France. European So Observ, Santiago, Chile. Osserv Astron Torino, INAF, I-10025 Pino Torinese, Italy. Osserv Astron Torino, INAF, I-00040 Monte Porzio Catone, Italy. Dipartimento Astron, I-35122 Padua, Italy. Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy. Univ Catolica Norte, Inst Astron, Antofagasta, Chile. Max Planck Inst Astron, D-69117 Heidelberg, Germany. Univ Hawaii, IFA, Honolulu, HI 96822 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Astron Observ, Tokyo 181, Japan. Max Planck Inst Aeron, D-37189 Katlenburg Lindau, Germany. European So Observ, D-85748 Garching, Germany. Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland. RP Barucci, MA, Observ Paris, LESIA, F-92195 Meudon, France. NR 29 TC 28 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2002 VL 392 IS 1 BP 335 EP 339 DI 10.1051/0004-6361:20021186 PG 5 SC Astronomy & Astrophysics GA 591FH UT ISI:000177868700034 ER PT J AU Cairos, LM Caon, N Garcia-Lorenzo, B Vilchez, JM Munoz-Tunon, C TI Spectrophotometric observations of blue compact dwarf galaxies: Markarian 370 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : individual (Markarian 370); galaxies : kinematics and dynamics; galaxies : starburst; stars : Wolf-Rayet ID H-II-REGIONS; STAR-FORMATION HISTORY; ALPHA VELOCITY-FIELDS; R-SURFACE PHOTOMETRY; INTERSTELLAR EXTINCTION; STELLAR POPULATIONS; AMORPHOUS GALAXIES; MULTIBAND ANALYSIS; OPTICAL STRUCTURE; MULTIPLE NUCLEI AB We present results from a detailed spectrophotometric analysis of the blue compact dwarf galaxy (BCD) Mrk 370, based on deep UBVRI broadband and Halpha narrowband observations, and on long-slit and two-dimensional spectroscopy of its brightest knots. The spectroscopic data are used to derive the internal extinction and to compute metallicities, electronic density, and temperature in the knots. By subtracting the contribution of the underlying older stellar population, modeled by an exponential function, removing the contribution from emission lines, and correcting for extinction, we can measure the true colors of the young star-forming knots. We show that the colors obtained this way differ significantly from those derived without the above corrections and lead to different estimates of the ages and star-forming history of the knots. Using predictions of evolutionary synthesis models, we estimate the ages of both the starburst regions and the underlying stellar component. We found that we can reproduce the colors of all the knots with an instantaneous burst of star formation and the Salpeter initial mass function ( IMF) with an upper mass limit of 100 M-circle dot. The resulting ages range between 3 and 6 Myr. The colors of the low surface brightness component are consistent with ages larger than 5 Gyr. The kinematic results suggest ordered motion around the major axis of the galaxy. C1 Univ Sternwarte Gottingen, D-37083 Gottingen, Germany. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. Isaac Newton Grp Telescopes, E-38780 La Palma, Canary Islands, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Chile, Dept Astron, Santiago, Chile. RP Cairos, LM, Univ Sternwarte Gottingen, Geismarlandstr 11, D-37083 Gottingen, Germany. NR 65 TC 14 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 20 PY 2002 VL 577 IS 1 PN Part 1 BP 164 EP 182 PG 19 SC Astronomy & Astrophysics GA 594DJ UT ISI:000178033200017 ER PT J AU Wang, ET Tan, ZY Willems, A Fernandez-Lopez, M Reinhold-Hurek, B Martinez-Romero, E TI Sinorhizobium morelense sp nov., a Leucaena leucocephala-associated bacterium that is highly resistant to multiple antibiotics SO INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY LA English DT Article DE Sinorhizobium morelense; phylogeny; DNA-DNA relatedness; antibiotic resistance ID GEN-NOV; DEOXYRIBONUCLEIC-ACID; RHIZOBIUM-TROPICI; GENETIC-STRUCTURE; STRAINS; NODULATE; HYBRIDIZATION; DIVERSITY; MELILOTI; MEDICAGO AB Sinorhizobium morelense sp. nov. is described to designate a group of bacteria isolated from root nodules of Leucaena leucocephala. S. morelense shows 98% 16S rRNA gene sequence similarity to some Sinorhizobium species and to Ensifer adhaerens. This novel species is distinguished from other Sinorhizobium species and from E. adhaerens by DNA-DNA hybridization, 16S rRNA gene restriction fragments and sequence and some distinctive phenotypic features. Strains of this species are highly resistant to some antibiotics, such as carbenicillin (1 mg ml-(1)), kanamycin (500 mug ml(-1)) and erythromycin (300 mug ml(-1)). They do not form nodules, but a nodulating strain, Lc57, is closely related to the novel species. Strain Lc04(T) (=LMG 21331(T)=CFN E1007(T)) is designated as the type strain of this novel species. C1 IPN, Escuela Nacl Ciencias Biol, Lab Microbiol Agricola, Mexico City 11340, DF, Mexico. Univ Bremen, Fac Biol & Chem, Lab Gen Microbiol, D-28334 Bremen, Germany. State Univ Ghent, Microbiol Lab, Vakgroep Biochim Fysiol & Microbiol, B-9000 Ghent, Belgium. CSIC, Estac Expt Zaidin, Grp Ecol Genet, E-18008 Granada, Spain. Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nnitrogeno, Cuernavaca 62191, Morelos, Mexico. RP Wang, ET, IPN, Escuela Nacl Ciencias Biol, Lab Microbiol Agricola, Prol Carpio & Plan Ayala, Mexico City 11340, DF, Mexico. NR 39 TC 20 PU SOC GENERAL MICROBIOLOGY PI READING PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG, BERKS, ENGLAND SN 1466-5026 J9 INT J SYST EVOL MICROBIOL JI Int. J. Syst. Evol. Microbiol. PD SEP PY 2002 VL 52 PN Part 5 BP 1687 EP 1693 DI 10.1099/ijs.0.01954-0 PG 7 SC Microbiology GA 595PG UT ISI:000178117500032 ER PT J AU Borie, F Redel, Y Rubio, R Rouanet, JL Barea, JM TI Interactions between crop residues application and mycorrhizal developments and some soil-root interface properties and mineral acquisition by plants in an acidic soil SO BIOLOGY AND FERTILITY OF SOILS LA English DT Article DE low soil pH; AM fungi; crop residues; nutrient availability; alleviation of toxic minerals ID ALUMINUM TOXICITY; FARMING SYSTEM; PHOSPHORUS; NITROGEN; GROWTH; PH; COLONIZATION; POPULATIONS; FUNGI; L. AB The addition of plant residues and the appropriate management of arbuscular mycorrhizal (AM) symbioses have been tested in an acidic soil, an Andisol from Southern Chile, to ascertain whether these agro-technologies help plants to withstand potential mineral deficiency and the toxicities inherent to the low pH conditions. Firstly, the effects of legume (lupine) and non-legume (wheat) crop residues on some key root-soil interface activities (including AM development), on mineral acquisition by the plants, and on the yield of wheat growing in the test Andisol were investigated in a pot experiment under greenhouse conditions. Both lupine and wheat residues were added at a rate equivalent to 300 g m(-2) to the natural soil. These organic amendments increased soil pH (wheat more than lupine), P availability and AM development (lupine more than wheat), plant performance and mineral acquisition (wheat more than lupine). Because of an increase in mycorrhizal activity, which appeared to be involved in the effect of the added crop (particularly lupine) residues, the role of the AM symbiosis was further investigated in a tailored inoculation assay, using a selected AM fungus (Glomus etunicatum), in interaction with lupine and wheat residues. A significant effect of AM inoculation on the reduction of Zn and Cu, and Mn and Al acquisition was demonstrated, which could be of interest in acid soils with regard to potential toxicity problems. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Univ La Frontera, Dept Ciencias Quim, Temuco, Chile. RP Barea, JM, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1, E-18008 Granada, Spain. NR 51 TC 6 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0178-2762 J9 BIOL FERT SOILS JI Biol. Fertil. Soils PD SEP PY 2002 VL 36 IS 2 BP 151 EP 160 DI 10.1007/s00374-002-0508-y PG 10 SC Soil Science GA 598KR UT ISI:000178275500010 ER PT J AU Barea, JM Toro, M Orozco, MO Campos, E Azcon, R TI The application of isotopic (P-32 and N-15) dilution techniques to evaluate the interactive effect of phosphate-solubilizing rhizobacteria, mycorrhizal fungi and Rhizobium to improve the agronomic efficiency of rock phosphate for legume crops SO NUTRIENT CYCLING IN AGROECOSYSTEMS LA English DT Article DE arbuscular mycorrhiza; N-15; P-32; phosphate solubilizing rhizobacteria; Rhizobium; rock phosphate ID SOIL; PHOSPHORUS; NITROGEN AB A pot experiment was designed to evaluate the interactive effects of multifunctional microbial inoculation treatments and rock phosphate (RP) application on N and P uptake by alfalfa through the use of N-15 and P-32 isotopic dilution approaches. The microbial inocula consisted of a wild type (WT) Rhizobium meliloti strain, the arbuscular mycorrhizal (AM) fungus Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe, and a phosphate solubilizing rhizobacterium (Enterobacter sp.). Inoculated microorganisms were established in the root tissues and/or in the rhizosphere soil of alfalfa plants (Medicago sativa L.). Improvements in N and P accumulation in alfalfa corroborate beneficial effects of Rhizobium and AM interactions. Inoculation with selected rhizobacteria improved the AM effect on N or P accumulation in both the RP-added soil and in the non RP-amended controls. Measurements of the N-15/N-14 ratio in plant shoots indicate an enhancement of the N-2 fixation rates in Rhizobium-inoculated AM-plants, over that achieved by Rhizobium in non-mycorrhizal plants. Whether or not RP was added, AM-inoculated plants showed a lower specific activity (P-32/P-31) than did their comparable non-mycorrhizal controls, suggesting that the plant was using otherwise unavailable P sources. The phosphate-solubilizing, AM-associated, microbiota could in fact release phosphate ions, either from the added RP or from the indigenous "less-available" soil phosphate. A low Ca concentrations in the test soil may have benefited P solubilization. Under field conditions, the inoculation with AM fungi significantly increased plant biomass and N and P accumulation in plant tissues. Phosphate-solubilizing rhizobacteria improved mycorrhizal responses in soil dually receiving RP and organic matter amendments. Organic matter addition favoured RP solubilization. This, together with a tailored microbial inoculation, increased the agronomic efficiency of RP in the test soil that was Ca deficient at neutral pH. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. CSIC, Dept Ciencias Tierra, E-18008 Granada, Spain. CSIC, Quim Ambiental Estac Expt Zaidin, E-18008 Granada, Spain. Acad Cubana Ciencias Habana, Inst Sistemat & Ecol, Havana, Cuba. RP Barea, JM, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, CProfesor Albareda 1, E-18008 Granada, Spain. NR 22 TC 14 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1385-1314 J9 NUTR CYCL AGROECOSYST JI Nutr. Cycl. Agroecosyst. PD MAY PY 2002 VL 63 IS 1 BP 35 EP 42 PG 8 SC Soil Science GA 600LU UT ISI:000178392600005 ER PT J AU Lisenfeld, U Braine, J Duc, PA Leon, S Charmandaris, V Brinks, E TI Abundant molecular gas in the intergalactic medium of Stephan's Quintet SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : clusters : individual : Stephan's Quintet; galaxies : individual : NGC 7319, NGC 7318b galaxies : interaction; galaxies : ISM; intergalactic medium ID TIDAL DWARF GALAXIES; INFRARED-EMISSION; SPIRAL GALAXIES; COMPACT-GROUPS; SHOCKS; STARBURST; SYSTEM; CO AB Stephan's Quintet (SQ) is a system consisting of at least four interacting galaxies which is well known for its complex dynamical and star formation history. It possesses a rich intergalactic medium (IGM), where hydrogen clouds, both atomic and molecular, associated with two starbursts (refered to as SQ A and B) have been found. In order to study the extent, origin and fate of the intergalactic molecular gas and its relation to the formation of stars outside galaxies and Tidal Dwarf Galaxies (TDGs), we mapped with the IRAM30 m antenna the carbon monoxide (CO) towards several regions of the IGMin SQ. In both SQ A and B, we detected unusually large amounts of molecular gas (3.1 x 10(9) M-. and 7 x 10(8) M-., respectively). In contrast, no significant CO detection was achieved towards HII regions south of the pair NGC 7318a/b despite their high Halpha luminosities. The molecular gas is very extended in both SQ A and SQ B, over areas of between 15 and 25 kpc. The CO clouds seem to have otherwise different properties and may be of a different nature. The integrated CO line of SQ A is in particular much wider than in SQ B. Its CO spectrum shows emission at two velocities (6000 and 6700 km s(-1)) that are coincident with two HI lines. The strongest emission at 6000 km s(-1) is however spatially offset from the HI emission and situated on a ridge south-east of the starburst region. In SQ B the CO emission coincides with that of tracers of star formation (Halpha, 15 mum and radio continuum). The CO peak lies slightly offset from the HI peak towards a steep HI gradient. This is indicating that the molecular gas is forming in-situ, possibly in a region of compressed HI, with subsequent star formation. The star forming region at SQ B is the object in SQ that most resembles a TDG. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Observ Bordeaux, INSU, CNRS, UMR 5804, F-33270 Florac, France. CNRS, URA 2052, F-91191 Gif Sur Yvette, France. CEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France. Univ Cologne, Inst Phys, D-5000 Cologne 41, Germany. Cornell Univ, Dept Astron, Ithaca, NY 14853 USA. Observ Paris, LERMA, F-75014 Paris, France. Univ Guanajuato, Dept Astron, Guanajuato 36000, Mexico. INAOE, Puebla 72000, Mexico. RP Lisenfeld, U, CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain. NR 27 TC 11 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2002 VL 394 IS 3 BP 823 EP 833 DI 10.1051/0004-6361:20021232 PG 11 SC Astronomy & Astrophysics GA 609CL UT ISI:000178885000011 ER PT J AU Gomez, Y Miranda, LF Torrelles, JM Rodriguez, LF Lopez, JA TI VLA observations at 7 mm of the planetary nebula IC 4997 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE ISM : jets and outflows; planetary nebulae : individual : IC 4997; radio continuum : ISM ID PROTOPLANETARY DISKS; IC-4997; EVOLUTION; SYSTEM; JET AB We present high angular resolution (0.1 arcsec) VLA observations at 7-mm wavelength towards the bipolar planetary nebula IC 4997. The 7-mm emission in IC 4997 is dominated by a bright, compact core, the flux density of which at this wavelength is about six times brighter than at 2.0 and 3.6 cm. We model the centimetre and millimetre continuum spectrum in terms of free-free emission from an ionized core-halo source. In this model a dense (2.6 x 10(6) cm(-3)), optically thick inner core dominates the millimetre emission, while a low-density (1 x 10(4) cm(-3)), optically thin halo dominates the centimetre emission. The spectral index of the core (between 2 cm and 7 mm) is alpha similar or equal to 1.6 +/- 0.1 (S-nu proportional to nu(alpha)), which is consistent with optically thick free-free emission. An upper limit for the mass-loss rate that created this inner core is similar to3 x 10(-6) M-. yr(-1), suggesting that this core may have been formed at the end of the superwind phase. C1 UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, Edifici Nexus, E-08034 Barcelona, Spain. UNAM, Inst Astron, Ensenada 22800, Baja California, Mexico. RP Gomez, Y, UNAM, Inst Astron, Campus Morelia,Apdo Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico. NR 24 TC 0 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD NOV 11 PY 2002 VL 336 IS 4 BP 1139 EP 1142 PG 4 SC Astronomy & Astrophysics GA 610VC UT ISI:000178981200010 ER PT J AU Boehnhardt, H Delsanti, A Barucci, A Hainaut, O Doressoundiram, A Lazzarin, M Barrera, L de Bergh, C Birkle, K Dotto, E Meech, K Ortiz, JE Romon, J Sekiguchi, T Thomas, N Tozzi, GP Watanabe, J West, RM TI ESO large program on physical studies of Transneptunian Objects and Centaurs: Visible photometry - First results SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE Kuiper-Belt; minor planets, asteroids; techniques : photometric ID KUIPER-BELT OBJECTS; DIVERSITY AB We present the first results of BVRI photometry of Transneptunian Objects (TNOs) and Centaurs obtained through the ESO Large Program on physical studies of these icy bodies in the outer solar system. In total 28 objects were observed of which 18 are new measurements. Combining our new BVRI photometry with the data summary published by Hainaut & Delsanti (2002) results in a database of 94 objects: 45 Cubewanos, 22 Plutinos, 13 scattered disk objects, 14 Centaurs. The reddening range seems to be similar among the four dynamical classes (-5 to 55%/100 nm) and only one outlier (1994 ES2) exists. The spectral gradient distribution of the Cubewanos peaks between 25 to 35%/100 nm, while for the three other types the maximum seems to fall below 20%/100 nm. A clustering of red Cubewanos with perihelia beyond similar to41 AU in low eccentricity and low inclination orbit suggests that these objects are less affected by the physical processes that potentially produce neutral colors, i.e. resurfacing by collision and by intrinsic activity. For Cubewanos and scattered disk objects, the range of reddening increases with decreasing perihelion distance and with increasing orbital excitation. A correlation of the spectral slope with inclination is present for Cubewanos and scattered disk objects, and is non-existent for the other dynamical types. It is unclear whether these trends (or their absence) are discriminative for the correctness of the resurfacing scenarios. If intrinsic activity is responsible for resurfacing, the start of the effect inside similar to41 AU from the Sun may be indicative for the driving agent, while in the collision scenario the survival of the red Cubewano cluster in the central region of the Kuiper-Belt argues for the existence of a population of bodies the surface of which is heavily radiation processed without impact resurfacing. C1 European So Observ, Santiago, Chile. Observ Paris, F-92195 Meudon, France. Astron Observ Padova, I-35122 Padua, Italy. Univ Catolica Norte, Inst Astron, Antofagasta, Chile. Max Planck Inst Astron, D-69117 Heidelberg, Germany. Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, Italy. Osserv Astron Roma, INAF, I-00040 Rome, Italy. Univ Hawaii, Honolulu, HI 96822 USA. Inst Astron Andalucia, Granada 18080, Spain. Natl Astron Observ, Tokyo 181, Japan. Max Planck Inst Aeron, D-37189 Katlenburg Lindau, Germany. Osserv Astrofis Arcetri, I-50125 Florence, Italy. European So Observ, D-85748 Garching, Germany. RP Boehnhardt, H, European So Observ, Alonso de Cordova 3107, Santiago, Chile. NR 23 TC 32 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2002 VL 395 IS 1 BP 297 EP 303 DI 10.1051/0004-6361:20021265 PG 7 SC Astronomy & Astrophysics GA 611ZH UT ISI:000179048000036 ER PT J AU Spadafora, C Repetto, Y Torres, C Pino, L Robello, C Morello, A Gamarro, F Castanys, S TI Two casein kinase 1 isoforms are differentially expressed in Trypanosoma cruzi SO MOLECULAR AND BIOCHEMICAL PARASITOLOGY LA English DT Article DE casein kinase 1; Trypanosoma cruzi; cell cycle; hymenialdisine; differential expression ID PROTEIN-KINASE; MOLECULAR-CLONING; GLYCOGEN-SYNTHASE; DNA-REPLICATION; I-DELTA; YEAST; PHOSPHORYLATION; GENE; CELL; IDENTIFICATION AB The cDNAs for two casein kinase 1 (CK1) homologues, TcCK1.1 and TcCK1.2, have been isolated from Trypanosoma cruzi. Both isoforms showed strong identity with other known CK1s. Their corresponding genes encode proteins of 312- and 330-amino acid residues with apparent molecular weights of 16 and 37 kDa, respectively. TcCK1.1 is a two-copy gene while TcCK1.2 is tandemly repeated, an arrangement not yet found in any other CK1. TcCK1.1 has been overexpressed in Escherichia coli and the recombinant protein exhibited properties characteristic of the CK1 family. Northern blot indicated that both TcCK1s are expressed differentially during the life stages of the parasite: the isoform TcCK1.1 shows low levels of mRNA expression in epimastigotes and increased expression in trypomastigotes while TcCK1.2 presents an augmented expression in amastigotes as compared with the other two life stages of the parasite. The CK1-like activity of amastigotes and trypomastigotes is significantly higher than that of epimastigotes and, independent of the life stage of the parasite, a constitutive activity is observed which, in the epimastigote forms, is found predominantly in the microsomal fraction. Also in the epimastigote forms, the CK1-like activity increases in the log phase of growth of the parasites, and, through synchronization studies, this activity has been most conspicuously circumscribed to the S and M phases of the cell cycle. (C) 2002 Elsevier Science B.V. All rights reserved. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Univ Chile, Fac Med, Inst Ciencias Biomed, Programa Farmacol Mol & Clin, Santiago 7, Chile. RP Castanys, S, CSIC, Inst Parasitol & Biomed Lopez Neyra, Calle Ventanilla 11, Granada 18001, Spain. NR 52 TC 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-6851 J9 MOL BIOCHEM PARASITOL JI Mol. Biochem. Parasitol. PD SEP-OCT PY 2002 VL 124 IS 1-2 BP 23 EP 36 PG 14 SC Biochemistry & Molecular Biology; Parasitology GA 613GF UT ISI:000179124000003 ER PT J AU Uc, VH Hernandez-Laguna, A Grand, A Vivier-Bunge, A TI Isomeric adduct stability in the addition of atomic radicals to toluene: H, O(P-3), F and Cl SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID GAS-PHASE; ATMOSPHERIC OXIDATION; MECHANISM; OH; KINETICS; EXCHANGE; BENZENE AB In recent work we have found that, in the case of the OH addition to toluene, ipso addition may be important. Moreover, quite different values were calculated for several of the EPR coupling constants of the different adduct isomers, suggesting that electron paramagnetic resonance measurements could provide decisive information on the selectivity of the OH radical addition reaction to toluene. In this work, the reaction of the atomic radicals, H, O(P-3), F and Cl with toluene has been studied using ab initio theoretical methods to compare the stability of the isomeric adducts and to predict their expected hyperfine coupling constants. Ipso addition is found to be favored only for fluorine, although the ipso and ortho isomers have very similar energies for oxygen and chlorine. Ipso adducts are expected to contribute nonnegligibly in all cases. C1 Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. CEA Grenoble, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble, France. RP Uc, VH, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico. NR 42 TC 3 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2002 VL 4 IS 23 BP 5730 EP 5738 DI 10.1039/b206865f PG 9 SC Chemistry, Physical; Physics, Atomic, Molecular & Chemical GA 615GM UT ISI:000179237500004 ER PT J AU Ramos-Gonzalez, MI Olson, M Gatenby, AA Mosqueda, G Manzanera, M Campos, MJ Vichez, S Ramos, JL TI Cross-regulation between a novel two-component signal transduction system for catabolism of toluene in Pseudomonas mendocina and the TodST system from Pseudomonas putida SO JOURNAL OF BACTERIOLOGY LA English DT Article ID CLUSTER ENCODING TOLUENE-4-MONOOXYGENASE; GRAM-NEGATIVE BACTERIA; FUNCTIONAL-ANALYSIS; CLONING VECTOR; GENES; PLASMID; PATHWAY; STRAIN; KR1; DEGRADATION AB The tmoABCDEF genes encode the toluene-4-monooxygenase from Pseudomonas mendocina KR1. Upstream from the tmoA gene an open reading frame, tmoX, encoding a protein 83% identical to TodX (todX being the initial gene in the todXFC1C2BADEGIH operon from Pseudomonas putida DOT-T1E) was found. The tmoX gene is also the initial gene in the tmoXABCDEF gene cluster. The transcription initiation point from the tmoX promoter was mapped, and the sequence upstream revealed striking identity with the promoter of the tod operon of P. putida. The tod operon is regulated by a two-component signal transduction system encoded by the todST genes. Two novel genes from P. mendocina KR1, tmoST, were rescued by complementation of a P. putida DOT-TIE todST knockout mutant, whose gene products shared about 85% identity with TodS-TodT. We show that transcription from P-tmoX and P-todX can be mediated by TmoS-TmoT or TodS-TodT, in the presence of toluene, revealing cross-regulation between these two catabolic pathways. C1 CSIC, Estac Expt Zaidin, Dept Biochem & Mol & Cellular Biol Plants, Granada 18008, Spain. DuPont Co Inc, Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA. Ctr Invest & Estudios Avanzados, Dept Plant Genet Engn, Plant Biotechnol Unit, Guanajuato 36500, Mexico. RP Ramos-Gonzalez, MI, CSIC, Estac Expt Zaidin, Dept Biochem & Mol & Cellular Biol Plants, Prof Albareda 1, Granada 18008, Spain. NR 38 TC 18 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD DEC PY 2002 VL 184 IS 24 BP 7062 EP 7067 DI 10.1128/JB.184.24.7062-7067.2002 PG 6 SC Microbiology GA 620JA UT ISI:000179529200034 ER PT J AU Biver, N Bockelee-Morvan, D Colom, P Crovisier, J Henry, F Lellouch, E Winnberg, A Johansson, LEB Gunnarsson, M Rickman, H Rantakyro, F Davies, JK Dent, WRF Paubert, G Moreno, R Wink, J Despois, D Benford, DJ Gardner, M Lis, DC Mehringer, D Phillips, TG Rauer, H TI The 1995-2002 long-term monitoring of comet C/1995 O1 (Hale-Bopp) at radiowavelength SO EARTH MOON AND PLANETS LA English DT Article DE C/1995 O1 (Hale-Bopp); comets; molecules; radio observations ID CARBON-MONOXIDE; FORMALDEHYDE; CO; POSTPERIHELION; NUCLEUS; HALLEY; RATES AB The bright comet Hale-Bopp provided the first opportunity to follow the outgassing rates of a number of molecular species over a large range of heliocentric distances. We present the results of our observing campaign at radio wavelengths which began in August 1995 and ended in January 2002. The observations were carried out with the telescopes of Nancay, IRAM, JCMT, CSO and, since September 1997, SEST. The lines of nine molecules (OH, CO, HCN, CH3OH, H2CO, H2S, CS, CH3CN and HNC) were monitored. CS, H2S, H2CO, CH3CN were detected up to r(h) = 3-4 AU from the Sun, while HCN and CH3OH were detected up to 6 AU. CO, which is the main driver of cometary activity at heliocentric distances larger than 3-4 AU, was last detected in August 2001, at r(h) = 14 AU. The gas production rates obtained from this programme contain important information on the nature of cometary ices, their thermal properties and sublimation mechanisms. Line shapes allow to measure gas expansion velocities, which, at large heliocentric distances, might be directly connected to the temperature of the nucleus surface. Inferred expansion velocity of the gas varied as r(h)(-0.4) within 7 AU from the Sun, but remained close to 0.4 km s(-1) further away. The CO spectra obtained at large r(h) are strongly blueshifted and indicative of an important day-to-night asymmetry in outgassing and expansion velocity. The kinetic temperature of the coma, estimated from the relative intensities of the CH3OH and CO lines, increased with decreasing r(h), from about 10 K at 7 AU to 110 K around perihelion. C1 ESA, ESTEC, NL-2200 AG Noordwijk, Netherlands. Observ Paris, LESIA, F-92195 Meudon, France. Onsala Space Observ, S-43992 Onsala, Sweden. Uppsala Astron Observ, S-75120 Uppsala, Sweden. European So Observ, Santiago 19, Chile. Royal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland. IRAM, E-18012 Granada, Spain. IRAM, F-38406 St Martin Dheres, France. Observ Bordeaux, F-33270 Florac, France. CALTECH, Pasadena, CA 91125 USA. DLR, Inst Planetenerkundung, D-12489 Berlin, Germany. RP Biver, N, ESA, ESTEC, Sci Sb,Keplerlaan 1, NL-2200 AG Noordwijk, Netherlands. NR 24 TC 22 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANET JI Earth Moon Planets PD MAR-JUN PY 2002 VL 90 IS 1-4 BP 5 EP 14 PG 10 SC Astronomy & Astrophysics; Geosciences, Multidisciplinary GA 622RM UT ISI:000179660800003 ER PT J AU Licandro, J Guerra, JC Campins, H Di Martino, M Lara, LM Gil-Hutton, R Tozzi, GP TI The surface of cometary nulcei related minor icy bodies SO EARTH MOON AND PLANETS LA English DT Article ID NICS C1 Ctr Galileo Galilei & Telescopio Nazl Galileo, Tenerife 38700, Spain. Univ Arizona, Tucson, AZ USA. Osserv Astron Torino, I-10025 Pino Torinese, Italy. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Observ Astron Felix Aguilar, RA-5407 Marquesado, San Juan, Argentina. Osservatorio Arcetri, I-50125 Florence, Italy. RP Licandro, J, Ctr Galileo Galilei & Telescopio Nazl Galileo, POB 565, Tenerife 38700, Spain. NR 2 TC 8 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANET JI Earth Moon Planets PD MAR-JUN PY 2002 VL 90 IS 1-4 BP 495 EP 496 PG 2 SC Astronomy & Astrophysics; Geosciences, Multidisciplinary GA 622RM UT ISI:000179660800053 ER PT J AU Umezawa, ES Bastos, SF Coura, JR Levin, MJ Gonzalez, A Rangel-Aldao, R Zingales, B Luquetti, AO da Silveira, JF TI An improved serodiagnostic test for Chagas' disease employing a mixture of Trypanosoma cruzi recombinant antigens SO TRANSFUSION LA English DT Article ID LINKED-IMMUNOSORBENT-ASSAY; SEROLOGICAL DIAGNOSIS; SYNTHETIC PEPTIDES; LINE IMMUNOASSAY; BLOOD-DONORS; SERA; CONFIRMATION; ANTIBODIES; AMERICA; SOUTH AB BACKGROUND: Blood transfusion is one of the most important transmission routes of Chagas' disease, a major parasitic infection in Latin America. Therefore, screening for antibodies to Trypanosoma cruzi is mandatory in blood banks in South America. Most of the commercial serologic tests employ epimastigote antigens and show a high number of inconclusive and false-positive results, with high economic and social costs. STUDY DESIGN AND METHODS: An ELISA using a mixture of three T. cruzi recombinant antigens, B13, 1F8, and H49 (mix-ELISA), was evaluated, first with a panel of well-characterized sera from 617 patients with Chagas' disease and 277 nonchagasic individuals, living in nine countries of South and Central America. Subsequently, the mix-ELISA was evaluated with 451 samples, from an endemic area of Brazil (Goias), that were rejected from several blood banks because they presented discrepant results by two commercially available kits (indirect immunofluorescence assay, indirect hemagglutination assay, and/or ELISA). RESULTS: The mix-ELISA exhibited 99.7 percent sensitivity and 98.6 percent specificity in the first evaluation with the 894 samples. In the second evaluation, 451 sera that had discrepant results in the first screening for Chagas' disease were further analyzed with the mix-ELISA. Upon consideration of the consensus results obtained with the trypomastigote excreted-secreted antigens blot test, a confirmatory test for Chagas' disease, the mix-ELISA led to a reduction in 99.6 percent in the number of discordant sera. CONCLUSION: The combination of three T. cruzi recombinant antigens in a multiantigen immunoassay was highly sensitive and specific for Chagas' disease diagnosis. It is proposed that it can be applicable in blood bank screening in conjunction with the conventional serologic tests. C1 USP, Inst Med Trop Sao Paulo, Lab Protozool, BR-05403000 Sao Paulo, Brazil. Univ Sao Paulo, Inst Chem, BR-05403000 Sao Paulo, Brazil. Fiocruz MS, Inst Oswaldo Cruz, Dept Trop Med, BR-21045900 Rio De Janeiro, Brazil. Consejo Nacl Invest Cient & Tecn, INGEBI, Lab Mol Biol Chagas Dis, RA-1033 Buenos Aires, DF, Argentina. CSIC, Inst Parasitol & Biomed, Granada, Spain. Univ Simon Bolivar, Caracas, Venezuela. Fed Univ Goias, Fac Med, Goiania, Go, Brazil. Fed Univ Goias, Inst Trop Pathol & Publ Hlth, Goiania, Go, Brazil. UNIFESP, Sch Med Sao Paulo, Dept Microbiol Immunol & Parasitol, Sao Paulo, Brazil. RP Umezawa, ES, USP, Inst Med Trop Sao Paulo, Lab Protozool, Ave Dr Eneas de Carvalho Aguiar 470, BR-05403000 Sao Paulo, Brazil. NR 30 TC 23 PU AMER ASSOC BLOOD BANKS PI BETHESDA PA 8101 GLENBROOK RD, BETHESDA, MD 20814-2749 USA SN 0041-1132 J9 TRANSFUSION JI Transfusion PD JAN PY 2003 VL 43 IS 1 BP 91 EP 97 PG 7 SC Hematology GA 634BY UT ISI:000180321200014 ER PT J AU Lara, LM Licandro, J Oscoz, A Motta, V TI Behaviour of Comet 21P/Giacobini-Zinner during the 1998 perihelion SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE comets : individual : 21P/Giacobini-Zinner; comets : general ID P/GIACOBINI-ZINNER; GIACOBINI-ZINNER; RADIO TELESCOPES; ATMOSPHERES; P/HALLEY; RATES; DUST; GAS; CN; PHOTOMETRY AB Comet 21P/Giacobini-Zinner was observed from Nov. 8 to Dec. 10, 1998. Pre- and post-perihelion CCD images of the gas (CN, C-2) and dust (green and red continua) coma were obtained with the 82 cm IAC-80 telescope at Teide Observatory (Canary Islands, Spain). For vp = 0.85r(H)(-0.5) and v(d) = 1.19 km s(-1) (i.e. characteristic of HCN being the CN parent species), the CN column density profiles are best reproduced with parent and daughter lifetimes of the order of 19 300 and 256 000 s. An equally good reproduction of the observed profiles is achieved by considering that a mixture of nitrogen compounds expanding at v(p) = 1 km s(-1) and with a lifetime of 19 000 s produces CN with an ejection velocity of v(d) = 2.5 km s(-1) and a lifetime of 174 000 s. Fitting the observed CN profiles with variable velocities and lifetimes, the results indicate that the nature of the CN precursor in comet 21P/Giacobini-Zinner is still unclear, ruling out HCN as the only precursor and favouring a mixture of nitrogen compounds. Regarding C-2, the derived lifetimes are 35 000 and 62 000 s, if the parent and daughter velocities are fixed at similar to1 km s(-1). Gas production rates derived by means of the Vectorial modeling with the mentioned above lifetimes and velocities indicate that (i) the comet activity decreases with decreasing r(H) (i.e. peak activity is not reached at the perihelion), and (ii) as already known, the comet is typically depleted in C-2 with a log Q(C2)/Q(CN) approximate to -0.4. The azimuthally averaged surface brightness profiles of the continuum images are well fitted with m greater than or equal to 1 in a log B-log rho representation at projected radial distances (rho) larger than 1000 km. The continuum light scattered from the dust in the coma of comet Giacobini-Zinner is redder than the Sun light on every date from Nov. 8 to 24, regardless the cometocentric distance. On Nov. 25, there is a sudden change in the dust color, being considerably bluer than the Sun, whereas on Dec. 7 and 8, the dust became much redder than it was before. These color variations do not seem to be related to sudden variations (relative minimum or maximum) in the cometary activity. The gas-to-dust mass ratio is similar to1, but affected by a large uncertainty (about a factor of 2) since the comet was not simultaneously imaged in the OH band, and the H2O production rate has been considered from other measurements taken some weeks before ours. C1 CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Ctr Galileo Galilei & Telescopio Nazl Galileo, Tenerife 38700, Spain. Inst Astrofis Canarias, Tenerife 38205, Spain. Univ Republica, Fac Ciencias, Dept Astron, Montevideo 11400, Uruguay. RP Lara, LM, CSIC, Inst Astrofis Andalucia, Camino Baja Huetor 24, E-18008 Granada, Spain. NR 41 TC 6 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 2003 VL 399 IS 2 BP 763 EP 772 DI 10.1051/0004-6361:20021720 PG 10 SC Astronomy & Astrophysics GA 643JW UT ISI:000180859000040 ER PT S AU Rodriguez, LF Anglada, G Torrelles, JM Mendoza-Torres, JE Haschick, AD Ho, PTP TI VLA Observations of water maser emission associated with SVS 13 SO COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLES SE IAU SYMPOSIA LA English DT Article ID HERBIG-HARO OBJECTS; EXCITING SOURCE; HH 7-11; NGC-1333; STAR AB The young stellar object SVS 13 has been proposed as the powering source of the HH 7-11 objects. Recent observations have revealed that in the radio continuum (3.6-cm) the source is a binary separated by about 0."3 in the east-west direction. We present Very Large Array observations, made in the highest angular resolution A configuration, of H2O maser emission toward this source. Our data show that the H2O spots appear to be segregated in two velocity groups: a group with radial velocity similar to that of the ambient cloud (V-LSR similar or equal to 8 km s(-1)) that is associated with the western radio source, and a blueshifted (by similar to20 km s(-1)) velocity group that is associated with the eastern radio source. We discuss the possible implications of this observation. C1 UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Inst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, Mexico. MIT, Haystack Observ, Westford, MA 01886 USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Rodriguez, LF, UNAM, Inst Astron, Campus Morelia,Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico. NR 14 TC 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA SN 0074-1809 J9 IAU SYMP PY 2002 IS 206 BP 59 EP 62 PG 4 SC Astronomy & Astrophysics GA BW16P UT ISI:000181054300011 ER PT S AU Torrelles, JM Patel, NA Gomez, JF Ho, PTP Rodriguez, LF Anglada, G Garay, G Greenhill, L Curiel, S Canto, J TI VLBA multi-epoch water maser observations towards Cepheus A SO COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLES SE IAU SYMPOSIA LA English DT Article ID THERMAL RADIO JET; A HW2; EMISSION AB We have carried out and recently reported VLBA multi-epoch water maser observations toward Cepheus A with an angular and velocity resolution of 0.5 mas and 0.2 km s(-1), respectively. Some of the masers detected previously with the VLA (observations made with angular and velocity resolutions of 80 mas and 1.3 km s(-1) respectively) are resolved now into linear/arcuate coherent "microstructures". These structures, while smaller than the VLA beam, are 6-200 times the size of the VLBA synthesized beam. The morphology and the observed proper motions found in these structures imply three different centers of star formation activity in a region of similar or equal to 0."3 radius (similar or equal to 200 AU). The most remarkable result from these observations is the discovery of an arc of water masers which is perfectly fitted by a circle to one part in a thousand. This arc is expanding and suggests a spherical "puff" of ejected material ejected 33 years ago from a protostar located 600 mas south of the radio jet HW2. This spherical ejection represents a very strong challenge for theoretical studies of star formation. C1 CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Chile, Dept Astron, Santiago, Chile. UNAM, Inst Astron, Mexico City 04510, DF, Mexico. RP Torrelles, JM, CSIC, IEEC, Edifici Nexus,C Gran Capita,2-4, E-08034 Barcelona, Spain. NR 12 TC 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA SN 0074-1809 J9 IAU SYMP PY 2002 IS 206 BP 84 EP 87 PG 4 SC Astronomy & Astrophysics GA BW16P UT ISI:000181054300017 ER PT J AU Raimann, D Storchi-Bergmann, T Delgado, RMG Fernandes, RC Heckman, T Leitherer, C Schmitt, H TI Stellar population gradients in Seyfert 2 galaxies: northern sample SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY DT Article DE galaxies : active; galaxies : Seyfert; galaxies : stellar content ID JET-INDUCED VELOCITIES; GALACTIC NUCLEI; STAR-CLUSTERS; INFRARED GALAXIES; ACTIVE GALAXIES; CONTINUUM; NGC-1068; VIRIAL AB We use high signal-to-noise ratio long-slit spectra in the lambdalambda3600-4700 range of the 20 brightest northern Seyfert 2 galaxies to study the variation of the stellar population properties as a function of distance from the nucleus. In order to characterize the stellar population and other continuum sources (e.g. featureless continuum, FC) we have measured the equivalent width, W , of six absorption features, four continuum colours and their radial variations, and performed spectral population synthesis as a function of distance from the nucleus. About half of the sample has Ca iiK and G band W values smaller at the nucleus than at 1 kpc from it, owing to a younger population and/or FC. The stellar population synthesis shows that, while at the nucleus, 75 per cent of the galaxies present contribution >20 per cent of ages less than or equal to100 Myr and/or of an FC, this proportion decreases to 45 per cent at 3 kpc. In particular, 55 per cent of the galaxies have a contribution >10 per cent of the 3-Myr/FC component (a degenerate component in which one cannot separate what is caused by an FC or by a 3-Myr stellar population) at the nucleus, but only 25 per cent of them have this contribution at 3 kpc. As a reference, the stellar population of 10 non-Seyfert galaxies, spanning the Hubble types of the Seyfert (from S0 to Sc) was also studied. A comparison between the stellar population of the Seyferts and that of the non-Seyferts shows systematic differences: the contribution of ages younger than 1 Gyr is in most cases larger in the Seyfert galaxies than in non-Seyferts, not only at the nucleus but up to 1 kpc from it. C1 Univ Fed Rio Grande Sul, IF, BR-91501970 Porto Alegre, RS, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Fed Santa Catarina, Dept Fis, CFM, BR-88040900 Florianopolis, SC, Brazil. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Natl Radio Astron Observ, Socorro, NM 87801 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Raimann, D, Univ Fed Rio Grande Sul, IF, CP 15051, BR-91501970 Porto Alegre, RS, Brazil. NR 28 TC 13 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAR 1 PY 2003 VL 339 IS 3 BP 772 EP 792 PG 21 SC Astronomy & Astrophysics GA 647DN UT ISI:000181077300023 ER PT J AU Sanchez, MJ Martinez, C Nieto, A Castellsague, X Quintana, MJ Bosch, FX Munoz, N Herrero, R Franceschi, S TI Oral and oropharyngeal cancer in Spain: influence of dietary patterns SO EUROPEAN JOURNAL OF CANCER PREVENTION LA English DT Article DE cancer of oral cavity and oropharynx; case-control study; diet; fruits; vegetables ID PHARYNGEAL CANCER; RISK-FACTORS; ATTRIBUTABLE RISK; FOOD GROUPS; CAVITY; EPIDEMIOLOGY; CONSUMPTION; HYPOPHARYNX; NUTRITION; SMOKING AB Cancer of the oral cavity and oropharynx is a major public health problem in Spain. Tobacco and alcohol have been identified as the two major risk factors for oral cancer in most western populations. Other risk factors include diets low in fruits and vegetables, but the impact of dietary habits on the risk of these cancers has never been assessed in Spain. The objective of this study was to elucidate the role of dietary habits in oral and oropharyngeal cancer, a multicentric case-control study was conducted in three areas of Spain (Barcelona, Granada and Sevilla) between 1996 and 1999. Cases were 375 patients (71 women), with incident, histologically confirmed cancer of the oral cavity or oropharynx, and controls were 375 subjects (71 women) admitted to hospitals for conditions unrelated to smoking or alcohol drinking. Data were analysed using multivariate logistic regression procedures. After allowance for education, tobacco and alcohol use, a significant inverse association with the risk of oral and oropharyngeal cancer was found for total consumption of total green vegetables (OR 0.54, 95% Cl = 0.34-0.87) and total fruit (OR 0.52, 95% CI = 0.34-0.79) with significant trends in risk. We found that the protective effect of each of these food items was consistently larger among current smokers and among heavy alcohol drinkers, following a multiplicative effect model. In conclusion, this study provides further support to the beneficial effect of high intake of vegetables and fruits on the risk of developing cancers of the oral cavity and oropharynx in Spain, particularly among current smokers and heavy alcohol drinkers. (C) 2003 Lippincott Williams Wilkins. C1 Escuela Andaluza Salud Publ, Registro Canc Granada, Granada 18080, Spain. Fac Med, Dept Ciencias Sociosanit, Seville, Spain. Inst Catala Oncol, Serv Epidemiol, Lhospitalet De Llobregat, Spain. Inst Catala Oncol, Registre Canc, Lhospitalet De Llobregat, Spain. Int Agcy Res Canc, F-69372 Lyon, France. Proyecto Epidemiol Guanacaste, San Jose, Costa Rica. RP Sanchez, MJ, Escuela Andaluza Salud Publ, Registro Canc Granada, Campus Univ Cartuja S-N, Granada 18080, Spain. NR 39 TC 13 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0959-8278 J9 EUR J CANCER PREV JI Eur. J. Cancer Prev. PD FEB PY 2003 VL 12 IS 1 BP 49 EP 56 DI 10.1097/01.cej.0000043739.13672.47 PG 8 SC Oncology GA 647WA UT ISI:000181116000008 ER PT J AU Gorosabel, J Christensen, L Hjorth, J Fynbo, JU Pedersen, H Jensen, BL Andersen, MI Lund, N Jaunsen, AO Ceron, JMC Castro-Tirado, AJ Fruchter, A Greiner, J Pian, E Vreeswijk, PM Burud, I Frontera, F Kaper, L Klose, S Kouveliotou, C Masetti, N Palazzi, E Rhoads, J Rol, E Salamanca, I Tanvir, N Wijers, RAMJ van den Heuvel, E TI A multi-colour study of the dark GRB 000210 host galaxy and its environment SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : fundamental parameters; techniques : photometric ID GAMMA-RAY BURSTS; INTERSTELLAR EXTINCTION; LUMINOSITY FUNCTION; MAGELLANIC CLOUD; NEUTRON-STARS; VELOCITIES; EXPLOSIONS; RADIATION; BIRTH AB We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z = 0.842(-0.042)(+0.014), which is in excellent agreement with the spectroscopic redshift (z = 0.8463 +/- 0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6' x 6' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L similar to 0.5 +/- 0.2 L*), with no companions above our detection threshold of 0.18 +/- 0.06 L*. Based on the restframe ultraviolet flux a star formation rate of 2.1 +/- 0.2 M, yr(-1) is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181(-0.026)(+0.037) Gyr and a very low extinction (A(v) similar to 0). We discuss the implications of the inferred low value of Av and the age of the dominant stellar population for the non-detection of the GRB 000210 optical afterglow. C1 Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. LAEFF INTA, Madrid 28080, Spain. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. Inst Astrophys, D-14482 Potsdam, Germany. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. European So Observ, Santiago 19, Chile. Real Inst, Secc Astron, Cadiz 11110, Spain. Observ Armada, Secc Astron, Cadiz 11110, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Osserv Astron Trieste, I-34131 Trieste, Italy. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. CNR, Ist Tecnol & Studio Radiaz Extraterrestri, I-40129 Bologna, Italy. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. RP Gorosabel, J, Danish Space Res Inst, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark. NR 46 TC 37 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2003 VL 400 IS 1 BP 127 EP 136 DI 10.1051/0004-6361:20021907 PG 10 SC Astronomy & Astrophysics GA 648XT UT ISI:000181177300015 ER PT J AU Riera, A Lopez, R Raga, AC Estalella, R Anglada, G TI The transverse velocity and excitation structure of the HH 110 jet SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : individual : HH 110; ISM : jets and outflows; stars : pre-main sequence ID CLOUD CORE; HH-110; COLLISION AB We present long-slit spectroscopic observations of the HH 110 jet obtained with the 4.2 m William Herschel Telescope. We have obtained for the first time, spectra for slit positions along and across the jet axis (at the position of knots B, C, I, J and P) to search for the observational signatures of entrainment and turbulence by studying the kinematics and the excitation structure. We find that the HH 110 flow accelerates from a velocity of 35 km s(-1) in knot A up to 110 km s(-1) in knot P. We find some systematic trends for the variation of the emission line ratios along the jet. No clear trends for the variation of the radial velocity are seen across the width of the jet beam. The cross sections of the jet show complex radial velocity and line emission structures which differ quite strongly from each other. C1 Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. Univ Politecn Catalunya, Dept Fis & Engn Nucl, Geltru 08800, Spain. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. RP Riera, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico. NR 10 TC 5 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2003 VL 400 IS 1 BP 213 EP 221 DI 10.1051/0004-6361:20021879 PG 9 SC Astronomy & Astrophysics GA 648XT UT ISI:000181177300022 ER PT J AU Lellouch, E Coustenis, A Sebag, B Cuby, JG Lopez-Valverde, M Schmitt, B Fouchet, T Crovisier, J TI Titan's 5-mu m window: observations with the Very Large Telescope SO ICARUS LA English DT Article DE infrared observations; atmospheres; composition; Titan ID SUBMILLIMETER HETERODYNE OBSERVATIONS; ICY GALILEAN SATELLITES; MIXED VERTICAL PROFILE; 5 MU-M; CARBON-MONOXIDE; INFRARED OBSERVATIONS; ADAPTIVE OPTICS; X-RAY; ATMOSPHERE; SURFACE AB We report on mid-resolution (Rsimilar to2000) spectroscopic observations of Titan, acquired in November 2000 with the Very Large Telescope and covering the range 4.75-5.07 mum. These observations provide a detailed characterization of the CO (1-0) vibrational band, clearly separating for the first time individual CO lines (P10 to P19 lines of (CO)-C-13). They indicate that the CO/N-2 mixing ratio in Titan's troposphere is 32+/-10 ppm. Comparison with photochemical models indicates that CO is not in a steady state in Titan's atmosphere. The observations confirm that Titan's 5-mum continuum geometric albedo is similar to0.06, and further indicates a similar to20% albedo decrease over 4.98-5.07 mum. Nonzero flux is detected at the 0.01 geometric albedo level in the saturated core of the (CO)-C-12 (1-0) band, at 4.75-4.85 mum, providing evidence for backscattering on the stratospheric haze. Finally, emission lines are detected at 4.75-4.835 mum, coinciding in position with lines from the CO(1-0) and/or CO(2-1) bands. Matching them by thermal emission would require Titan's stratosphere to be much warmer (by similar to 25 K at 0.1 mbar) than indicated by the methane 7.7-mum emission and the Voyager radio-occultation. We show instead that a nonthermal mechanism, namely solar-excited fluorescence, is a more plausible source for these emissions. Improved observations and laboratory measurements on the vibrational-translational relaxation of CO are needed for further interpretation of these emissions in terms of a CO stratospheric mixing ratio. (C) 2003 Elsevier Science (USA). All rights reserved. C1 Observ Paris, F-92195 Meudon, France. Univ Oxford, Oxford OX1 3PU, England. Lab Planetol Grenoble, F-38406 St Martin Dheres, France. Inst Astrofis Andalucia, E-18080 Granada, Spain. European So Observ, Santiago 19, Chile. RP Lellouch, E, Observ Paris, F-92195 Meudon, France. EM emmanuel.lellouch@obspm.fr NR 66 TC 18 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0019-1035 J9 ICARUS JI Icarus PD MAR PY 2003 VL 162 IS 1 BP 125 EP 142 DI 10.1016/S0019-1035(02)00079-9 PG 18 SC Astronomy & Astrophysics GA 658FG UT ISI:000181710500011 ER PT J AU Jaunsen, AO Andersen, MI Hjorth, J Fynbo, JPU Holland, ST Thomsen, B Gorosabel, J Schaefer, BE Bjornsson, G Natarajan, P Tanvir, NR TI An HST study of three very faint GRB host galaxies SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; cosmology : observations; galaxies : starburst ID GAMMA-RAY BURSTS; GRB-980329; AFTERGLOW AB As part of the HST/STIS GRB host survey program we present the detection of three faint gamma-ray burst (GRB) host galaxies based on an accurate localisation using ground-based data of the optical afterglows (OAs). A common property of these three hosts is their extreme faintness. The location at which GRBs occur with respect to their host galaxies and surrounding environments are robust indicators of the nature of GRB progenitors. The bursts studied here are among the four most extreme outliers, in terms of relative distance from the host center, in the recent comprehensive study of Bloom et al. (2002). We obtain a revised and much higher probability that the galaxies identified as hosts indeed are related to the GRBs (P(n(chance))=0.69, following Bloom et al. 2002), thereby strengthening the conclusion that GRBs are preferentially located in star-forming regions in their hosts. Apart from being faint, the three hosts consist of multiple structures, indicative of merging and active star-formation. For one of the hosts, GRB 980329, we estimate a photometric redshift of zsimilar to3.5. C1 European So Observ, Santiago 19, Chile. Univ Oulu, Div Astron, Oulu 90014, Finland. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 28080, Spain. Univ Texas, Dept Astron, Austin, TX 78712 USA. Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland. Yale Univ, Dept Astron, New Haven, CT 06511 USA. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. RP Jaunsen, AO, European So Observ, Casilla 19001, Santiago 19, Chile. NR 39 TC 17 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2003 VL 402 IS 1 BP 125 EP 132 DI 10.1051/0004-6361:20030154 PG 8 SC Astronomy & Astrophysics GA 665NU UT ISI:000182128200014 ER PT J AU Gunnarsson, M Bockelee-Morvan, D Winnberg, A Rickman, H Crovisier, J Biver, N Colom, P Davies, JK Despois, D Henry, F Johansson, LEB Moreno, R Paubert, G Rantakyro, FT TI Production and kinematics of CO in comet C/1995 O1 (Hale-Bopp) at large post-perihelion distances SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE comets : individual : C/1995 O1 (Hale-Bopp); radio lines : solar system ID CARBON-MONOXIDE; EXCITATION; NUCLEUS; SCHWASSMANN-WACHMANN-1; EVOLUTION; WIRTANEN; H2O AB Radio observations of different molecular species in comet C/1995 O1(Hale-Bopp) have been carried out regularly since August 1995. We present an analysis of carbon monoxide spectra observed at SEST. A detailed picture of the nature of the post-perihelion outgassing at large heliocentric distances is shown. The data starts at 2.9 AU, with active water sublimation, and stretch outside 10 AU, where CO-driven activity is still detected. The activity is studied using a coma model which separates the outgassing into two different sources, one insolation-dependent source, peaking at the subsolar point, and one isotropically outgassing source. Gas velocities and production rates of the two sources are derived for two different cases. In the first case the isotropic source is assumed to be inside the nucleus, and in the second case this source is assumed to be CO-rich material in the coma. Under both assumptions, the results indicate that the two component sources evolve independently. At heliocentric distances around 3 AU, acceleration of the CO molecules in the innermost region of the coma is required for the model to fit the observations. This acceleration must occur at a slower rate than that predicted by hydrodynamic simulations. From 6 to 10 AU, the derived parameters appear remarkably constant. The nuclear outgassing velocity is generally unchanged with heliocentric distance during this wide interval. Observations of molecules other than CO are included in the SEST dataset, and a comparison is made to the modelling results. HCN and CH3OH show signs of being produced in the same way as the CO up to a heliocentric distance of 6 AU. C1 Astron Observ, S-75120 Uppsala, Sweden. Observ Paris, F-92195 Meudon, France. Onsala Space Observ, S-43900 Onsala, Sweden. ESTEC Sci So, European Space Agcy, Noordwijk, Netherlands. Joint Astron Ctr, Hilo, HI 96720 USA. Observ Bordeaux, Bordeaux, France. Inst Radio Astron Millimetr, Grenoble, France. Inst Radio Astron Millimetr, Granada, Spain. European So Observ, Santiago 19, Chile. Univ Chile, Observ Cerro Calan, Santiago, Chile. RP Gunnarsson, M, Astron Observ, Box 515, S-75120 Uppsala, Sweden. NR 31 TC 5 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2003 VL 402 IS 1 BP 383 EP 393 DI 10.1051/0004-6361:20030178 PG 11 SC Astronomy & Astrophysics GA 665NU UT ISI:000182128200039 ER PT J AU Infante, L Varela, J Moles, M Hertling, G Garcia, A Menanteau, F TI Quasars clustering at z similar to 3 on scales less than or similar to 10 h(-1) Mpc SO ASTROPHYSICAL JOURNAL LA English DT Article DE large-scale structure of universe; quasars : general ID HIGH-REDSHIFT; GALAXIES; QSO; EVOLUTION AB We test the hypothesis of whether high-redshift quasi-stellar objects (QSOs) would preferentially appear in small groups or pairs and whether they are associated with massive young clusters. We carried out a photometric search for Lyalpha emitters on scales less than or similar to 10 h(-1) Mpc in the fields of a sample of 47 z approximate to 3 known QSOs. Wide and narrowband filter color-magnitude diagrams were generated for each of the 6'.6 x 6'.6 fields. A total of 13 nonresolved objects with a significant color excess were detected as QSO candidates at a redshift similar to that of the target. All the candidates are significantly fainter than the reference QSOs, with only two of them within 2 mag of the central object. Follow-up spectroscopic observations have shown that five, i.e., about 40% of the candidates, are QSOs at the same redshift of the target; four are QSOs at different z ( two of them probably being a lensed pair at z = 1.47); two candidates are unresolved H II galaxies at z similar to 0.3; and one unclassified and one candidate turned out to be a CCD flaw. These data indicate that at least 10% of the QSOs at z similar to 3 do have companions. We have also detected a number of resolved, rather bright Lyalpha emitter candidates. Most likely, a large fraction of them might be bright galaxies with [O II] emission, at z approximate to 0.3. The fainter population of our candidates corresponds to the current expectations. Thus, there are no strong indications for the existence of an overdensity of Lyalpha galaxies brighter than m approximate to 25 around QSOs at z approximate to 3. C1 Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. CSIC, Inst Matemat & Fis Fundamental, E-28006 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. RP Infante, L, Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Casilla 306, Santiago 22, Chile. NR 19 TC 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 1 PY 2003 VL 588 IS 1 PN Part 1 BP 90 EP 98 PG 9 SC Astronomy & Astrophysics GA 671EF UT ISI:000182451800007 ER PT J AU Proenza, JA Alfonso, P Melgarejo, JC Gervilla, F Tritlla, J Fallick, AE TI D, O and C isotopes in podiform chromitites as fluid tracers for hydrothermal alteration processes of the Mayari-Baracoa Ophiolitic Belt, eastern Cuba SO JOURNAL OF GEOCHEMICAL EXPLORATION LA English DT Article DE fluids; serpentinization; stable isotopes; ophiolites; Cuba ID ULTRAMAFIC ROCKS; OXYGEN; SERPENTINIZATION; HYDROGEN; WATERS AB The Mayari-Baracoa Ophiolitic Belt (MBOB, eastern Cuba) is composed of two large, chromite-rich massifs: Mayari-Cristal and Moa-Baracoa. The chromitites and hosting dunites were firstly affected by a regional serpentinization event, a subsequent episode of hydrothermal alteration (chloritization mainly) and, finally, these already altered bodies were crosscut by thin calcite-dominated veins. Analysed serpentines from serpentinized chromitites and dunites present very similar isotopic compositions (delta(18)O= + 4.7 parts per thousand to + 6.3 parts per thousand and deltaD = - 67 parts per thousand to - 60 parts per thousand), suggesting that the serpentinization process took place at moderate temperatures, in an oceanic environment. Serpentine formation by interaction with ocean water is also supported by the isotopic composition of chlorite and calcite. These results suggest that the serpentinization, chloritization and fracture filling processes of the Mayari-Baracoa Ophiolite Belt took place in a subocean floor scenario and, thus, that the Mayari-Baracoa serpentines represent a good example of serpentine formed during interaction with seawater. The oceanic origin of the serpentines from serpentinized chromitites and dunites from the MBOB indicate that the serpentinization of the mantle sequence occurred pre-thrusting (pre-emplacement in age). (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ Barcelona, Dept Cristal Iog Mineral & Diposits Minerals, CMDM, E-08028 Barcelona, Spain. Fac Ciencias, Inst Andaluz Ciencas Tierra, Granada 18002, Spain. UNAM, Ctr Geociencias, Queretaro 76230, Mexico. SUERC, Isotope Geosci Unit, Glasgow, Lanark, Scotland. RP Proenza, JA, Univ Barcelona, Dept Cristal Iog Mineral & Diposits Minerals, CMDM, C-Marti I Franques S-N, E-08028 Barcelona, Spain. NR 12 TC 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-6742 J9 J GEOCHEM EXPLOR JI J. Geochem. Explor. PD MAY PY 2003 VL 78-9 SI Sp. Iss. SI BP 117 EP 122 DI 10.1016/S00375-6742(03)00021-9 PG 6 SC Geochemistry & Geophysics GA 673LQ UT ISI:000182582800022 ER PT J AU Fracchia, S Godeas, A Scervino, JM Sampedro, I Ocampo, JA Garcia-Romera, I TI Interaction between the soil yeast Rhodotorula mucilaginosa and the arbuscular mycorrhizal fungi Glomus mosseae and Gigaspora rosea SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article DE arbuscular mycorrhiza; Gigaspora rosea; Glomus mosseae; Rhodotorula mucilaginosa; soil yeast ID SACCHAROMYCES-CEREVISIAE; FUSARIUM-OXYSPORUM; GROWTH; INTRARADICES; COLONIZATION; RHIZOSPHERE; INFECTION; BACTERIA; PLANTS; ROOTS AB The effect of the soil yeast, Rhodotorula mucilaginosa LBA, on Glomus mosseae (BEG n(o)12) and Gigaspora rosea (BEG n(o)9) was studied in vitro and in greenhouse trials. Hyphal length of G. mosseae and G. rosea spores increased significantly in the presence of R. mucilaginosa. Exudates from R. mucilaginosa stimulated hyphal growth of G. mosseae and G. rosea spores. Increase in hyphal length of G. mosseae coincided with an increase in R. mucilaginosa exudates. No stimulation of G. rosea hyphal growth was detected when 0.3 and 0.5 ml per petri dish of yeast exudates was applied. Percentage root length colonization by G. mosseae in soybean (Glycine max L. Merill) and by G. rosea in red clover (Trifolium pratense L. cv. Huia) was increased only when the soil yeast was inoculated before G. mosseae or G. rosea was introduced. Beneficial effects of R. mucilaginosa on arbuscular mycorrhizal (AM) colonization were found when the soil yeast was inoculated either as a thin agar slice or as a volume of 5 and 10 ml of an aqueous solution. R. mucilaginosa exudates (20 ml per pots) applied to soil increased significantly the percentage of AM colonization of soybean and red clover. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. RP Garcia-Romera, I, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1,Apdo 419, E-18008 Granada, Spain. NR 30 TC 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD MAY PY 2003 VL 35 IS 5 BP 701 EP 707 DI 10.1016/S0038-0717(03)00086-5 PG 7 SC Soil Science GA 678JD UT ISI:000182863000007 ER PT J AU Valero-Garces, BL Delgado-Huertas, A Navas, A Edwards, L Schwalb, A Ratto, N TI Patterns of regional hydrological variability in central-southern Altiplano (18 degrees-26 degrees S) lakes during the last 500 years SO PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY LA English DT Article ID NORTHERN CHILE; ATACAMA-ALTIPLANO; ATMOSPHERIC CIRCULATION; BOLIVIAN-ALTIPLANO; CLIMATE HISTORY; LAGUNA-MISCANTI; CENTRAL ANDES; ICE CAP; HOLOCENE; PRECIPITATION AB Paleohydrological reconstructions based on sedimentological, geochemical, and isotopic records from a lake transect in the central-southern Altiplano (18degrees-26degreesS) indicate abrupt moisture fluctuations during the last 500 years. A change to modem conditions occurred in the late 19th century in all the records, from northern Chile (Lago Chungara, 18degrees15'S) and the Atacama (Laguna Miscanti, 23degrees45'S) to the southern tip of the Altiplano (Laguna El Peinado, NW Argentina, 26degrees30'S). A previous drier period shows different patterns of timing, duration, and intensity. In Chungara, the and period was shorter and occurred during the late 19th and early 20th centuries, while in Miscanti, it occurred earlier and ended at the beginning of the 20th century. In El Peinado, conditions were wetter during the 17-19th centuries and the and period occurred prior to the 17th century. Other records from the region show abrupt paleohydrological and paleoclimatic changes synchronous with the termination of the Little Ice Age. Despite local differences and dating uncertainties, the Little Ice Age stands out as a significant though complex climatic event in the Andean Altiplano. The discrepancies between the northern and southern Altiplano records during the last few centuries may reflect contrasting responses to external forcing in two areas with different climatic regimes. (C) 2003 Elsevier Science B.V. All rights reserved. C1 CSIC, Pyrenean Inst Ecol, E-50080 Zaragoza, Spain. CSIC, Estac Expt El Zaidin, Granada, Spain. CSIC, Estac Expt Aula Dei, E-50080 Zaragoza, Spain. Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455 USA. Univ Heidelberg, Inst Umwelt Geochem, D-69120 Heidelberg, Germany. Univ Buenos Aires, RA-1002 Buenos Aires, DF, Argentina. RP Valero-Garces, BL, CSIC, Pyrenean Inst Ecol, Apdo 202, E-50080 Zaragoza, Spain. NR 52 TC 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0031-0182 J9 PALAEOGEOGR PALAEOCLIMATOL JI Paleogeogr. Paleoclimatol. Paleoecol. PD MAY 15 PY 2003 VL 194 IS 1-3 BP 319 EP 338 DI 10.1016/S0031-0182(03)00284-0 PG 20 SC Geography, Physical; Geosciences, Multidisciplinary; Paleontology GA 679PP UT ISI:000182931400017 ER PT J AU Covino, S Malesani, D Tavecchio, F Antonelli, LA Arkharov, A Di Paola, A Fugazza, D Ghisellini, G Larionov, V Lazzati, D Mannucci, F Masetti, N Barrena, R Benetti, S Castro-Tirado, AJ Alighieri, SD Fiore, F Frontera, F Fruchter, A Ghinassi, F Gladders, M Hall, PB Israel, GL Klose, S Magazzu, A Palazzi, E Pedani, M Pian, E Romano, P Stefanon, M Stella, L TI Optical and NIR observations of the afterglow of GRB020813 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; radiation mechanisms : non-thermal ID GAMMA-RAY BURST; 28 FEBRUARY 1997; LIGHT CURVES; GRB 990510; EMISSION; SCATTERING; GRB-010921; SPECTRA; MODEL AB We present optical and near-infrared (NIR) photometry of the bright afterglow of GRB020813. Our data span from 3 hours to 4 days after the GRB event. A rather sharp achromatic break is present in the light curve, 14 hours after the trigger. In the framework of jetted fireballs, this break corresponds to a jet half-opening angle of 1.9degrees +/- 0.2degrees, the smallest value ever inferred for a GRB. We discuss our results in the framework of currently available models, and find that they have problems in explaining the joint temporal and spectral properties, and in particular the slow decay before the break. C1 Osserv Astron Brera, INAF, I-23807 Merate, LC, Italy. Osserv Astron Roma, INAF, I-00136 Rome, Italy. Cent Astron Observ Pulkovo, St Petersburg 196140, Russia. Telescopio Nazl Galileo, INAF, Santa Cruz De La Palma 38700, Spain. St Petersburg Univ, St Petersburg 198504, Russia. Isaac Newton Inst Chile, St Petersburg Branch, St Petersburg, Russia. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England. CNR, Inst Radioastron, I-50125 Florence, Italy. Ist Astrofis Spaziale & Fis Cosm, I-40129 Bologna, Italy. Osserv Astron Padova, INAF, I-35122 Padua, Italy. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Carnegie Observ, Pasadena, CA 91101 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. Princeton Univ Observ, Princeton, NJ 08544 USA. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Thuringer Landessternwarte Tautenburg, Karl Schwarzschild Observ, D-07778 Tautenburg, Germany. RP Covino, S, Osserv Astron Brera, INAF, Via E Bianchi 46, I-23807 Merate, LC, Italy. EM covino@mi.astro.it NR 42 TC 28 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2003 VL 404 IS 1 BP L5 EP L9 DI 10.1051/0004-6361:20030525 PG 5 SC Astronomy & Astrophysics GA 682FP UT ISI:000183081300002 ER PT J AU Masetti, N Palazzi, E Pian, E Simoncelli, A Hunt, LK Maiorano, E Levan, A Christensen, L Rol, E Savaglio, S Falomo, R Castro-Tirado, AJ Hjorth, J Delsanti, A Pannella, M Mohan, V Pandey, SB Sagar, R Amati, L Burud, I Ceron, JMC Frontera, F Fruchter, AS Fynbo, JPU Gorosabel, J Kaper, L Klose, S Kouveliotou, C Nicastro, L Pedersen, H Rhoads, J Salamanca, I Tanvir, N Vreeswijk, PM Wijers, RAMJ van den Heuvel, EPJ TI Optical and near-infrared observations of the GRB020405 afterglow SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; radiation mechanisms : non-thermal; line : identification; cosmology : observations ID GAMMA-RAY BURST; SOUTHERN SPECTROPHOTOMETRIC STANDARDS; LIGHT CURVES; LINEAR-POLARIZATION; GRB AFTERGLOWS; DUST ECHOES; SN 2002AP; 1ST MONTH; SUPERNOVA; VARIABILITY AB We report on photometric, spectroscopic and polarimetric monitoring of the optical and near-infrared (NIR) afterglow of GRB020405. Ground-based optical observations, performed with 8 different telescopes, started about 1 day after the high-energy prompt event and spanned a period of similar to10 days; the addition of archival HST data extended the coverage up to similar to150 days after the GRB. We report the first detection of the afterglow in NIR bands. The detection of Balmer and oxygen emission lines in the optical spectrum of the host galaxy indicates that the GRB is located at redshift z = 0.691. Fe II and Mg II absorption systems are detected at z = 0.691 and at z = 0.472 in the afterglow optical spectrum. The latter system is likely caused by absorbing clouds in the galaxy complex located similar to2" southwest of the GRB020405 host. Hence, for the first time, the galaxy responsible for an intervening absorption line system in the spectrum of a GRB afterglow is spectroscopically identified. Optical and NIR photometry of the afterglow indicates that, between 1 and 10 days after the GRB, the decay in all bands is consistent with a single power law of index alpha = 1.54 +/- 0.06. The late-epoch VLT J-band and HST optical points lie above the extrapolation of this power law, so that a plateau ( or "bump") is apparent in the VRIJ light curves at 10-20 days after the GRB. The light curves at epochs later than day similar to20 after the GRB are consistent with a power-law decay with index alpha' = 1.85 +/- 0.15. While other authors have proposed to reproduce the bump with the template of the supernova ( SN) 1998bw, considered the prototypical "hypernova", we suggest that it can also be modeled with a SN having the same temporal profile as the other proposed hypernova SN2002ap, but 1.3 mag brighter at peak, and located at the GRB redshift. Alternatively, a shock re-energization may be responsible for the rebrightening. A single polarimetric R-band measurement shows that the afterglow is polarized, with P = 1.5 +/- 0.4% and polarization angle theta = 172degrees +/- 8degrees. Broad-band optical-NIR spectral flux distributions show, in the first days after the GRB, a change of slope across the J band which we interpret as due to the presence of the electron cooling frequency v(c). The analysis of the multiwavelength spectrum within the standard fireball model suggests that a population of relativistic electrons with index p similar to 2.7 produces the optical-NIR emission via synchrotron radiation in an adiabatically expanding blastwave, with negligible host galaxy extinction, and the X-rays via Inverse Compton scattering off lower-frequency afterglow photons. C1 CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Univ Bologna, Dipartimento Astron, I-40126 Bologna, Italy. CNR, Ist Radioastron, Sez Firenze, I-50125 Florence, Italy. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Inst Astrophys, D-14482 Potsdam, Germany. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Johns Hopkins Univ, Baltimore, MD 21218 USA. Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy. Osserv Astron Padova, INAF, I-35122 Padua, Italy. CSIC, IAA, E-18080 Granada, Spain. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. LESIA, Observ Paris Meudon, F-92195 Meudon, France. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. State Observ, Naini Tal 263129, Uttaranchal, India. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Real Inst & Observ Armada, Secc Astron, Cadiz 11110, Spain. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. NASA, MSFC, Huntsville, AL 35812 USA. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Palermo, I-90146 Palermo, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. European So Observ, Santiago 19, Chile. RP Masetti, N, CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, Via Gobetti 101, I-40129 Bologna, Italy. EM masetti@bo.iasf.cnr.it NR 94 TC 35 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2003 VL 404 IS 2 BP 465 EP 481 DI 10.1051/0004-6361:20030491 PG 17 SC Astronomy & Astrophysics GA 685VA UT ISI:000183283300010 ER PT J AU Gomez-Villamandos, JC Carrasco, L Bautista, MJ Sierra, MA Quezada, M Hervas, J De Lara, FCM Ruiz-Villamor, E Salguero, FJ Sonchez-Cordon, PJ Romanini, S Nunez, A Mekonen, T Mendez, A Jover, A TI African swine fever and classical swine fever: a review of the pathogenesis SO DEUTSCHE TIERARZTLICHE WOCHENSCHRIFT LA English DT Article DE African swine fever; classical swine fever; monocyte-macrophage-system; thrombocytopenia; haemorrhages; lymphopenia ID PULMONARY INTRAVASCULAR MACROPHAGES; TUMOR-NECROSIS-FACTOR; HOG-CHOLERA VIRUS; SUBCELLULAR CHANGES; T-LYMPHOCYTES; FACTOR-ALPHA; LYMPH-NODES; BONE-MARROW; CELL-DEATH; APOPTOSIS AB This paper describes major pathogenetic mechanisms of African and Classical Swine Fever virus infections. The interactions between both viruses and the monocyte-macrophage-system result in the release of mediator molecules, which are important for the further progression of the diseases. The causes of the thrombocytopenia and the mechanisms of the haemorrhages, which are characteristic in both infections, are described. Apoptotic cell death is regarded as the predominant cause of lymphopenia in both virus infections. C1 Fac Vet, Dept Anat Patol, Cordoba, Spain. Fac Vet, Dept Patol, Chillan, Chile. HISTOLAB, Malaga, Spain. Cent Vet Lab, Granada, Spain. Ctr Invest Sanidad Anim, Madrid, Spain. Fac Vet, Dpto Patol, Rio Cuarto, Argentina. RP Gomez-Villamandos, JC, Fac Vet, Dpto Anat & Anat Patol Comparada, Ed Sanidad Anim,Campus Univ Rabanales,Crtra Madri, Cordoba 14014, Spain. NR 70 TC 1 PU M H SCHAPER GMBH CO KG PI ALFELD PA BORSIGSTRASSE 5, POSTFACH 16 42, 310460 ALFELD, GERMANY SN 0341-6593 J9 DEUT TIERARZTL WOCHENSCHR JI Dtsch. Tierarztl. Wochenschr. PD APR PY 2003 VL 110 IS 4 BP 165 EP 169 PG 5 SC Veterinary Sciences GA 685ZE UT ISI:000183294200009 ER PT J AU Hjorth, J Sollerman, J Moller, P Fynbo, JPU Woosley, SE Kouvellotou, C Tanvir, NR Greiner, J Andersen, MI Castro-Tirado, AJ Ceron, JMC Fruchter, AS Gorosabel, J Jakobsson, P Kaper, L Klose, S Masetti, N Pedersen, H Pedersen, K Pian, E Palazzi, E Rhoads, JE Rol, E van den Heuvel, EPJ Vreeswijk, PM Watson, D Wijers, RAMJ TI A very energetic supernova associated with the gamma-ray burst of 29 March 2003 SO NATURE LA English DT Article ID 25 APRIL 1998; HUBBLE-SPACE-TELESCOPE; SN 1998BW; AFTERGLOW; EMISSION AB Over the past five years evidence has mounted that long-duration (>2 s) gamma-ray bursts (GRBs)-the most luminous of all astronomical explosions-signal the collapse of massive stars in our Universe. This evidence was originally based on the probable association of one unusual GRB with a supernova(1), but now includes the association of GRBs with regions of massive star formation in distant galaxies(2,3), the appearance of supernova-like 'bumps' in the optical afterglow light curves of several bursts(4-6) and lines of freshly synthesized elements in the spectra of a few X-ray afterglows(7). These observations support, but do not yet conclusively demonstrate, the idea that long-duration GRBs are associated with the deaths of massive stars, presumably arising from core collapse. Here we report evidence that a very energetic supernova (a hypernova) was temporally and spatially coincident with a GRB at redshift z=0.1685. The timing of the supernova indicates that it exploded within a few days of the GRB, strongly suggesting that core-collapse events can give rise to GRBs, thereby favouring the 'collapsar' model(8,9). C1 Univ Copenhagen, NBIfAFG, Astron Observ, DK-2100 Copenhagen O, Denmark. Stockholm Observ, Dept Astron, S-10691 Stockholm, Sweden. European So Observ, D-85748 Garching, Germany. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. NSSTC, Huntsville, AL 35805 USA. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Inst Astrophys, D-14482 Potsdam, Germany. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. European So Observ, Santiago 19, Chile. RP Hjorth, J, Univ Copenhagen, NBIfAFG, Astron Observ, Juliane Maries Vej, DK-2100 Copenhagen O, Denmark. NR 30 TC 453 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD JUN 19 PY 2003 VL 423 IS 6942 BP 847 EP 850 DI 10.1038/nature01750 PG 5 SC Multidisciplinary Sciences GA 691BQ UT ISI:000183585300039 ER PT J AU de Halac, IN Cismondi, IA Rodriguez-Garcia, MI Fama, G TI Distribution of pectins in the pollen apertures of Oenothera hookeri.velans ster/+ster SO BIOCELL LA English DT Article DE pectins; monoclonal antibodies; JIM5; JIM7; immunogold; pollen; sporoderm; Oenothera; cytochemistry ID CELL-WALLS; MALE-STERILITY; IMMUNOCYTOCHEMICAL LOCALIZATION; ELECTRON MICROSCOPY; FLOWERING PLANTS; POLYSACCHARIDES; BIOSYNTHESIS; SECTIONS; ONTOGENY; ANTHERS AB Cell wall pectins are some of the most complex biopolymers known, and yet their functions remain largely mysterious. The aim of this paper was to deepen the study of the spatial pattern of pectin distribution in the aperture of Oenothera hookeri.velans ster/+ster fertile pollen. We used "in situ" immunocytochemical techniques at electron microscopy, involving monoclonal antibodies JIM5 and JIM7 directed against pectin epitopes in fertile pollen grains of Oenothera hookeri.velans ster/+ster. The same region was also analyzed by classical cytochemistry for polysaccharide detection. Immunogold labelling at the JIM7 epitope showed only in mature pollen labelling mainly located at the intine endo-aperture region. Cytoplasmic structures near the plasma membrane of the vegetative cell showed no labelling gold grains. In the same pollen stage the labelling at the JIM5 epitope was mostly confined to a layer located in the limit between the endexine and the ektexine at the level of the border of the oncus. Some tubuli at the base of the ektexine showed also an accumulation of gold particles. No JIM5 label was demonstrated in the aperture chamber and either in any cytoplasmic structure of the pollen grains. The immunocytochemical technique, when compared with the traditional methods for non- cellulose polysaccharide cytochemistry is fare more sensitive and allows the univocal determination of temporal and spatial location of pectins recognized by the JIM7 and JIM5 MAbs. C1 Univ Nacl Cordoba, Fac Ciencias Med, Catedra Clin Pediat, CEMECO, RA-5000 Cordoba, Argentina. Univ Nacl Cordoba, Fac Odontol, Catedra Biol Celular, RA-5000 Cordoba, Argentina. CSIC, Estac Expt Zaidin, Granada, Spain. RP de Halac, IN, Univ Nacl Cordoba, Fac Ciencias Med, Catedra Clin Pediat, CEMECO, Ferroviarios 1250, RA-5000 Cordoba, Argentina. NR 43 TC 1 PU INST HISTOL EMBRIOL-CONICET PI MENDOZA PA FAC CIENCIAS MED-UNIV NAC CUYO CASILLA DE CORREO 56, 5500 MENDOZA, ARGENTINA SN 0327-9545 J9 BIOCELL JI Biocell PD APR PY 2003 VL 27 IS 1 BP 11 EP 18 PG 8 SC Cell Biology GA 692DL UT ISI:000183645400002 ER PT J AU Rol, E Wijers, RAMJ Fynbo, JPU Hjorth, J Gorosabel, J Egholm, MP Ceron, JMC Castro-Tirado, AJ Kaper, L Masetti, N Palazzi, E Pian, E Tanvir, N Vreeswijk, P Kouveliotou, C Moller, P Pedersen, H Fruchter, AS Rhoads, J Burud, I Salamanca, I Van den Heuvel, EPJ TI Variable polarization in the optical afterglow of GRB021004 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; polarization; radiation mechanisms : non-thermal ID GAMMA-RAY BURSTS; LINEAR-POLARIZATION; LIGHT CURVES; GRB-021004; VARIABILITY; GRB-990510; GRB-020405; EMISSION AB We present polarimetric observations of the afterglow of gamma-ray burst (GRB) 021004, obtained with the Nordic Optical Telescope ( NOT) and the Very Large Telescope (VLT) between 8 and 17 hours after the burst. Comparison among the observations shows a 45 degree change in the position angle from 9 hours after the burst to 16 hours after the burst, and comparison with published data from later epochs even shows a 90 degree change between 9 and 89 hours after the burst. The degree of linear polarization shows a marginal change, but is also consistent with being constant in time. In the context of currently available models for changes in the polarization of GRBs, a homogeneous jet with an early break time of t(b) approximate to 1 day provides a good explanation of our data. The break time is a factor 2 to 6 earlier than has been found from the analysis of the optical light curve. The change in the position angle of the polarization rules out a structured jet model for the GRB. C1 Univ Amsterdam, Astron Inst, NL-1098 SJ Amsterdam, Netherlands. Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Inst Astrofis Andalucia, Granada 18008, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Nord Opt Telescope, Tenerife 38700, Spain. Real Inst & Observ Armada, Secc Astron, Cadiz 11110, Spain. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. Astron Observ Trieste, INAF, I-34131 Trieste, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. European So Observ, Santiago 19, Chile. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. European So Observ, D-85748 Garching, Germany. RP Rol, E, Univ Amsterdam, Astron Inst, Kruislaan 403, NL-1098 SJ Amsterdam, Netherlands. NR 45 TC 27 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2003 VL 405 IS 3 BP L23 EP L27 DI 10.1051/0004-6361:20030731 PG 5 SC Astronomy & Astrophysics GA 696HF UT ISI:000183881000001 ER PT J AU Vivas, A Marulanda, A Gomez, M Barea, JM Azcon, R TI Physiological characteristics (SDH and ALP activities) of arbuscular mycorrhizal colonization as affected by Bacillus thuringiensis inoculation under two phosphorus levels SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article DE Bacillus thuringiensis; mycorrhiza-bacteria interaction; SDH and ALP fungal activities; phosphorus ID PHOSPHATE-SOLUBILIZING RHIZOBACTERIA; FUNGAL ALKALINE-PHOSPHATASE; TRIFOLIUM-REPENS L; RHIZOSPHERE BACTERIA; EXTERNAL HYPHAE; PLANT-RESPONSES; ROCK PHOSPHATE; GLOMUS; GROWTH; ROOT AB The effect of Bacillus thuringiensis (B.t.) inoculation on plant growth and on the intra- and extraradical mycorrhizal development of lettuce roots colonized by Glomus mosseae or Glomus intraradices was examined in an inert, soil-less substrate. Histochemical determination of succinate dehydrogenase (SDH) and alkaline phosphatase (ALP) activities which indicate active fungal metabolism was carried out at two phosphorus (P) levels. The presence of B.t. increased extra- and intraradical colonization [measured as frequency (%F), intensity (%I) and percentage of arbuscules (%A)] for both arbuscular mycorrhizal fungi (AMF) rather than plant growth or nutrition regardless P level. Under the lowest level of P fertilization, B.t. enhanced to a similar extent the extra- and intraradical development of both endophytes, but the proportion of fungal tissue showing SDH or ALP was increased in G. intraradices-colonized plants. [SDH: 458% (M) and 512% (A); ALP: 358% (M) and 300% (A)]. P supply decreased G. intraradices colonization to a higher extent than G. mosseae. Nevertheless, the totality of G. intraradices structures developed in P-amended medium showed intraradical o extraradical activity, while in G. mosseae-colonized roots, SDH and ALP activities highly decreased relative to fungal tissue determined by TB staining as affected by P. Our results show that bacterial inoculation compensates the negative effect of P on the intraradical fungal growth and vitality. P amendment reduced in a higher extent G. intraradices infection intensity (non-vital and vital staining) and G. mosseae activity (ALP staining). Thus, big differences in the proportion of SDH-active infection showing ALP activity in mycelium developed by each endophyte were noted at the highest P level. Physiological plant parameters such as photosynthetic activity did not explain specific changes on each arbuscular-mycorrhizal fungus as affected by P or B.t. inoculation. The increased extraradical mycelium development and metabolic fungal activity as a result of B.t. inoculation positively affected N and P plant content and photosynthetic rate in G. intraradices-colonized plants under the lowest P conditions. In general, the increased metabolically active fungal biomass in co-inoculated plants was irrespective of P level and was not related to the P plant uptake from the inert soil-less substrate. These results show the bacterial effect increasing the physiological and metabolic status of AM endophytes, which not only confirms but also extends previous findings on arbuscular mycorrhizae-bacteria interactions. The present study emphasizes the ecological and practical importance of rhizosphere free-living bacteria as mycorrhizae-helper microorganisms. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Univ Caldas, Fac Ciencias Agropecuarias, Manizales, Colombia. CSIC, Dept Agroecol & Protecc Vegetal, E-18008 Granada, Spain. RP Azcon, R, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1, E-18008 Granada, Spain. NR 53 TC 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD JUL PY 2003 VL 35 IS 7 BP 987 EP 996 DI 10.1016/S0038-0717(03)00161-5 PG 10 SC Soil Science GA 700RT UT ISI:000184125500013 ER PT J AU Willems, A Fernandez-Lopez, M Munoz-Adelantado, E Goris, J De Vos, P Martinez-Romero, E Toro, N Gillis, M TI Description of new Ensifer strains from nodules and proposal to transfer Ensifer adhaerens Casida 1982 to Sinorhizobium as Sinorhizobium adhaerens comb. nov. Request for an opinion SO INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY LA English DT Article ID NONSYMBIOTIC RHIZOBIUM-LEGUMINOSARUM; DEOXYRIBONUCLEIC-ACID; BURKHOLDERIA-CEPACIA; NUCLEOTIDE-SEQUENCE; DNA HYBRIDIZATION; SP. NOV; GEN-NOV; SOIL; PLASMID; IDENTIFICATION AB A group of four diverse rhizobial isolates and two soil isolates that are highly related to Ensifer adhaerens were characterized by a polyphasic approach. On the basis of DNA-DNA hybridizations and phenotypic features, these strains cannot be distinguished clearly form Ensifer adhaerens, a soil bacterium that was described in 1982, mainly on the basis of phenotypic characteristics. Phylogenetically, Ensifer and Sinorhizobium form a single group in the 16S rDNA dendrogram of the alpha-Proteobacteria, as well as in an analysis of partial recA gene sequences. They may therefore be regarded as a single genus. Because Sinorhizobium was proposed in 1988, according to the Bacteriological Code (1990 Revision) the older name, Ensifer, has priority. However, there are several reasons why a change from Sinorhizobium to Ensifer may not be the best solution and making an exception to Rule 38 may be more appropriate. We therefore propose the species Sinorhizobium adhaerens comb. nov. and put forward a Request for an Opinion to the Judicial Commission regarding the conservation of Sinorhizobium adhaerens over Ensifer adhaerens. C1 State Univ Ghent, Fac Wetenschappen, Lab Microbiol, Vakgrp Biochem Fysiol Microbiol, B-9000 Ghent, Belgium. CSIC, Grp Ecol Genet, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Nacl Autonoma Mexico, Ctr Invest Sobre Fijacion Nitrogeno, Cuernavaca, Morelos, Mexico. RP Willems, A, State Univ Ghent, Fac Wetenschappen, Lab Microbiol, Vakgrp Biochem Fysiol Microbiol, Ledeganckstr 35, B-9000 Ghent, Belgium. NR 51 TC 15 PU SOC GENERAL MICROBIOLOGY PI READING PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG, BERKS, ENGLAND SN 1466-5026 J9 INT J SYST EVOL MICROBIOL JI Int. J. Syst. Evol. Microbiol. PD JUL PY 2003 VL 53 PN Part 4 BP 1207 EP 1217 DI 10.1099/ijs.0.02264-0 PG 11 SC Microbiology GA 702RR UT ISI:000184237700042 ER PT J AU Fynbo, JPU Jakobsson, P Moller, P Hjorth, J Thomsen, B Andersen, MI Fruchter, AS Gorosabel, J Holland, ST Ledoux, C Pedersen, H Rhoads, J Weidinger, M Wijers, RAMJ TI On the Ly alpha emission from gamma-ray burst host galaxies: Evidence for low metallicities SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : high redshift; techniques : photometric ID OPTICAL AFTERGLOW; REDSHIFT; EXTINCTION; DISCOVERY; EMITTERS; SYSTEMS AB We report on the results of a search for Lyalpha emission from the host galaxy of the z = 2.140 GRB 011211 and other galaxies in its surrounding field. We detect Lyalpha emission from the host as well as from six other galaxies in the field. The restframe equivalent width of the Lyalpha line from the GRB 011211 host is about 21 Angstrom. This is the fifth detection of Lyalpha emission out of five possible detections from GRB host galaxies, strongly indicating that GRB hosts, at least at high redshifts, are Lyalpha emitters. This is intriguing as only similar to25% of the Lyman-Break selected galaxies at similar redshifts have Lyalpha emission lines with restframe equivalent width larger than 20 Angstrom. Possible explanations are i) a preference for GRB progenitors to be metal-poor as expected in the collapsar model, ii) an optical afterglow selection bias against dusty hosts, and iii) a higher fraction of Lyalpha emitters at the faint end of the luminosity function for high-z galaxies. Of these, the current evidence seems to favour i). C1 Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. European So Observ, D-85748 Garching, Germany. Inst Astrophys, D-14482 Potsdam, Germany. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. European So Observ, Santiago 19, Chile. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. RP Fynbo, JPU, Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. NR 40 TC 58 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2003 VL 406 IS 3 BP L63 EP L66 DI 10.1051/0004-6361:20030931 PG 4 SC Astronomy & Astrophysics GA 704BL UT ISI:000184317800004 ER PT J AU Rubio, R Borie, F Schalchli, C Castillo, C Azcon, R TI Occurrence and effect of arbuscular mycorrhizal propagules in wheat as affected by the source and amount of phosphorus fertilizer and fungal inoculation SO APPLIED SOIL ECOLOGY LA English DT Article DE P-fertilizers; mycorrhizal propagules; wheat; acidic soil; G. etunicatum ID TRIFOLIUM-SUBTERRANEUM L; ACID-PHOSPHATASE-ACTIVITY; ASH-DERIVED SOILS; EXTERNAL HYPHAE; ORGANIC PHOSPHORUS; RAPID ASSESSMENT; ROOTS; COLONIZATION; GROWTH; FIELD AB Volcanic ash-derived soils in Chile show very unique behavior and properties as soil system due to their unusual composition characterized by high allophane and stabilized humus content. These soils constitute excellent models to study both natural and man-induced VA mycorrhizal effect over plant nutrition and soil ecology sustainability. This paper studies the effect of Glomus etunicatum inoculation of wheat in a natural volcanic soil fertilized with soluble P or with partially acidulated-rock phosphate (pa-RP) at two rates (17 and 86 kg P ha(-1)); yield, plant phosphorus acquisition, and mycorrhizal colonized root length, are measured. The influence of these treatments on mycorrhizal mycelium and spore production as well as on soil phosphatase (P-ase) activity was also determined. The inoculation of G. etunicatum, locally isolated, increased significantly the extent of P plant acquisition, spore number, length of extraradical mycelium, and P-ase activity when compared with indigenous arbuscular mycorrhizal (AM) fungi fertilized with pa-RP, at the level of 86 kg ha(-1). In concordance with these results, the remaining available P in the experimental soil without inoculation was depressed. A negative impact of soluble P application in G. etunicatum inoculated soil was noted in the P-ase activity, and also in the effectiveness of the applied inoculum in relation to P plant uptake. In soil AM inoculated and fertilized with pa-RP (86 kg ha(-1)), the enhancement of P-ase activity was related to high mycelium development and spore formation. P plant acquisition in G. etunicatunt inoculated plants ranged from 4.96 to 11.57 mg per pot when 86 kg ha(-1) of pa-RP is applied compared with the same amount of soluble P Surprisingly, adding pa-RP does not improve the amount of colonized root length. Fungal root AM colonization and AM propagules (mycelium and spores) were not depressed at higher soluble P supply, but the activity of G. etunicatum measured as P plant uptake was strongly affected. The inoculation with G. etunicatum enhances spore production, particularly at the lower soluble P and at the highest pa-RP levels. A close relationship (r = 0.938) between AM spores and P-ase activity was found. Only in pa-RP treatments the G. etunicatum inoculation reduced the external P wheat requirements. The improvement of P-ase activity by G. etunicatum inoculation, as a biological factor involved in P-cycling in soil, may be an important mechanism related to plant P acquisition. It is concluded that pa-RP is the best source of P, not only by increasing P uptake by interacting with G. etunicatum, but also by enhancing AM propagules (mycelium and spores) remaining in soil. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ La Frontera, Dept Ciencias Quim, Temuco, Chile. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Granada 18008, Spain. RP Rubio, R, Univ La Frontera, Dept Ciencias Quim, Casilla 54-D, Temuco, Chile. EM rrubio@ufro.cl NR 63 TC 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0929-1393 J9 APPL SOIL ECOL JI Appl. Soil Ecol. PD JUL PY 2003 VL 23 IS 3 BP 245 EP 255 DI 10.1016/S0929-1393(03)00045-3 PG 11 SC Soil Science GA 704CY UT ISI:000184321200006 ER PT J AU Luridiana, V Peimbert, A Peimbert, M Cervino, M TI The effect of collisional enhancement of Balmer lines on the determination of the primordial helium abundance SO ASTROPHYSICAL JOURNAL LA English DT Article DE atomic processes; galaxies : abundances; galaxies : individual (H29, I Zw 18, SBS 0335-052); galaxies : ISM; HII regions; ISM : abundances ID EVOLUTIONARY SYNTHESIS MODELS; WOLF-RAYET STARS; H-II REGIONS; HII-REGIONS; X-RAY; PHOTOIONIZATION MODELS; CHEMICAL-COMPOSITION; PHYSICAL CONDITIONS; PLANETARY-NEBULAE; COMPACT GALAXIES AB This paper describes a new determination of the primordial helium abundance (YP), based on the abundance analysis of five metal-poor extragalactic H II regions. For three regions of the sample (SBS 0335 - 052, I Zw 18, and H29) we present tailored photoionization models based on improved calculations with respect to previous models. In particular, we use the photoionization models to study quantitatively the effect of collisional excitation of Balmer lines on the determination of the helium abundance (Y) in the individual regions. This effect is twofold: first, the intensities of the Balmer lines are enhanced with respect to the pure recombination value, mimicking a higher hydrogen abundance; second, the observed reddening is larger than the true extinction, as a result of the differential effect of collisions on different Balmer lines. In addition to these effects, our analysis takes into account the following features of H II regions: ( 1) the temperature structure, ( 2) the density structure, ( 3) the presence of neutral helium, ( 4) the collisional excitation of the He I lines, ( 5) the underlying absorption of the He I lines, and ( 6) the optical thickness of the He I lines. The object that shows the highest increase in Y after the inclusion of collisional effects in the analysis is SBS 0335 - 052, whose helium abundance has been revised by DeltaY = +0.0107. The revised Y-values for the five objects in our sample yield an increase of + 0.0035 in Y-P, giving Y-P = 0.2391 +/- 0.0020. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid, Spain. RP Luridiana, V, CSIC, Inst Astrofis Andalucia, Apartado Correos 3004, E-18080 Granada, Spain. NR 68 TC 34 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 2003 VL 592 IS 2 PN Part 1 BP 846 EP 865 PG 20 SC Astronomy & Astrophysics GA 705RG UT ISI:000184408100015 ER PT J AU Cairos, LM Caon, N Papaderos, P Noeske, K Vilchez, JM Lorenzo, BG Munoz-Tunon, C TI Deep near-infrared mapping of young and old stars in blue compact dwarf galaxies SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : dwarf; galaxies : evolution; galaxies : starburst; galaxies : structure; infrared : galaxies ID PRIMORDIAL HELIUM ABUNDANCE; HEAVY-ELEMENT ABUNDANCES; EMISSION-LINE GALAXIES; R-SURFACE PHOTOMETRY; H-II GALAXIES; STELLAR POPULATIONS; SPECTROPHOTOMETRIC OBSERVATIONS; BRIGHTNESS DISTRIBUTION; STRUCTURAL PARAMETERS; AMORPHOUS GALAXIES AB We analyze J, H, and K-s near-infrared data for nine blue compact dwarf (BCD) galaxies, selected from a larger sample that we have already studied in the optical. We present contour maps, surface brightness and color profiles, and color maps of the sample galaxies. The morphology of the BCDs in the near-infrared (NIR) has been found to be basically the same as in the optical. The inner regions of these systems are dominated by the starburst component. At low surface brightness levels the emission is due to the underlying host galaxy; the latter is characterized by red, radially constant colors and isophotes well fitted by ellipses. We derive accurate optical-NIR host galaxy colors for eight of the sample galaxies; these colors are typical of an evolved stellar population. Interestingly, optical-NIR color maps reveal the presence of a complex, large-scale absorption pattern in three of the sample galaxies. We study the applicability of the Sersic law to describe the surface brightness profiles of the underlying host galaxy and find that, because of the limited surface brightness interval over which the fit can be made, the derived Sersic parameters are very sensitive to the selected radial interval and to errors in the sky subtraction. Fitting an exponential model gives generally more stable results and can provide a useful tool to quantify the structural properties of the host galaxy and compare them with those of other dwarf classes, as well as with those of star-forming dwarfs at higher redshifts. C1 Univ Sternwarte Gottingen, D-37083 Gottingen, Germany. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. Univ Chile, Dept Astron, Santiago, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Isaac Newton Grp Telescopes, E-38780 Santa Cruz De La Palma, Canary Islands, Spain. RP Cairos, LM, Univ Sternwarte Gottingen, Geismarlandstr 11, D-37083 Gottingen, Germany. NR 85 TC 15 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2003 VL 593 IS 1 PN Part 1 BP 312 EP 332 PG 21 SC Astronomy & Astrophysics GA 708TN UT ISI:000184585600023 ER PT J AU Rodriguez, E Ferro, AA Costa, V Lopez-Gonzalez, MJ Sareyan, JP TI delta Sct-type nature of the variable V2109 Cyg SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : variables : delta Sct; stars : individual : V2109 Cyg; stars : oscillations; techniques : photometric, spectroscopic ID SIMULTANEOUS UVBY PHOTOMETRY; A-TYPE STARS; STROMGREN PHOTOMETRY; NONRADIAL PULSATION; SCUTI; CATALOG AB We present the results of simultaneous uvbybeta photometry carried out from 1999 to 2001 of the variable V2109 Cyg together with a spectroscopic analysis based on one high resolution spectrum obtained in 2000. From this study, the star is definitively classified as an evolved delta Sct-type variable with solar metal abundances. This conclusion is also supported by the detected multiperiodic pulsational behaviour and the observed variation of the m(1) index over the pulsation cycle. This variation is slightly reversed relative to the V light curve, in very good agreement with the m(1) variation expected from the photometric calibrations. Besides the main frequency f(1)=5.3745 cd(-1) and its first harmonic 2f(1), a secondary peak is found at f(2)=5.8332 cd(-1) (f(1)/f(2)=0.92) with f(1) identified as a radial mode and f(2) as non-radial. Whereas no significant variations are found in the amplitude of f(1) from season to season, the amplitude of f(2) changes strongly. Moreover, the main period has remained constant since 1990, within the observational uncertainties. Additional secondary frequencies may also be excited in this variable. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Inst Astron, Mexico City 4510, DF, Mexico. Observ Cote Azur, F-0634 Nice, France. RP Rodriguez, E, CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. NR 34 TC 2 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2003 VL 407 IS 3 BP 1059 EP 1065 DI 10.1051/0004-6361:20030925 PG 7 SC Astronomy & Astrophysics GA 710FD UT ISI:000184669400030 ER PT J AU Luquetti, AO Ponce, C Ponce, E Esfandiari, J Schijman, A Revollo, S Anez, N Zingales, B Ramgel-Aldao, R Gonzalez, A Levin, MJ Umezawa, ES da Silveira, JF TI Chagas' disease diagnosis: a multicentric evaluation of Chagas Stat-Pak, a rapid immunochromatographic assay with recombinant proteins of Trypanosoma cruzi SO DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE DT Article ID SYNTHETIC PEPTIDE; ANTIGENS; SERODIAGNOSIS; IMMUNOASSAY; BLOOD; ANTIBODIES; INFECTION; LINEAGES; TESTS; SERA AB A rapid serologic test for diagnosis of T. cruzi infection (Chagas Stat Pak) was developed using recombinant proteins in an immunochromatographic assay. This cassette formal test was evaluated first in blind with a panel of 393 coded serum samples. The Chagas Stat-Pak identified 197 infected (98.5% sensitivity) and 183 non-infected individuals (94.8% specificity). A second evaluation was performed with 352 sera from four Latin America countries tested independently in each Country, showing a sensitivity of 100% and specificity of 98.6%. A third set of tests comparing sera with plasma and eluates from filter paper as well as serum preserved in 50% glycerol did show identical results as those obtained with serum. This rapid test (15 min) uses one device per sample, does not require refrigeration nor a laboratory structure or specialized skills to be performed, accepts different types of samples and may be stored for long periods of time for result checking and documentation. These attributes together with the high sensitivity and specificity demonstrated herein, make this test a suitable tool for field studies, small laboratories and emergencies at blood banks in the countryside of endemic areas. (C) 2003 Elsevier Inc. All rights reserved. C1 UNIFESP, Escola Paulista Med, Dept Microbiol Immunol & Parasitol, Sao Paulo, Brazil. Univ Fed Goias, Fac Med, Inst Patol & Saude Publ, Goiania, Go, Brazil. Secretaria Salud, Lab Referencia Enfermedad Chagas & Leihmaniasis, Tegucigalpa, Honduras. Chembio Diagnost Syst Inc, Medford, NY USA. Inst INGEGI, Buenos Aires, DF, Argentina. Fac Sc Farmaceut & Bioquim, Inst Serv, Lab Diagnost & Invest Salud Seladis, La Paz, Bolivia. Univ Los Andes, Merida, Venezuela. Univ Sao Paulo, Inst Quim, Dept Bioquim, BR-01498 Sao Paulo, Brazil. Univ Simon Bolivar, Dept Ciencias Biol, Caracas, Venezuela. CSIC, Inst Parasitol & Biomed, Granada, Spain. Univ Sao Paulo, Inst Trop Med S Paulo, Sao Paulo, Brazil. RP da Silveira, JF, UNIFESP, Escola Paulista Med, Dept Microbiol Immunol & Parasitol, Sao Paulo, Brazil. NR 22 TC 8 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0732-8893 J9 DIAGN MICROBIOL INFECT DIS JI Diagn. Microbiol. Infect. Dis. PD AUG PY 2003 VL 46 IS 4 BP 265 EP 271 DI 10.1016/S0732-8893(03)00051-8 PG 7 SC Infectious Diseases; Microbiology GA 719GN UT ISI:000185195400007 ER PT J AU Gorosabel, J Klose, S Christensen, L Fynbo, JPU Hjorth, J Greiner, J Tanvir, N Jensen, BL Pedersen, H Holland, ST Lund, N Jaunsen, AO Ceron, JMC Castro-Tirado, AJ Fruchter, A Pian, E Vreeswijk, PM Burud, I Frontera, F Kaper, L Kouveliotou, C Masetti, N Palazzi, E Rhoads, J Rol, E Salamanca, I Wijers, RAMJ van den Heuvel, E TI The blue host galaxy of the red GRB 000418 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : fundamental parameters; techniques : photometric ID GAMMA-RAY BURSTS; LUMINOUS INFRARED GALAXIES; STAR-FORMING GALAXIES; INTERSTELLAR EXTINCTION; OPTICAL AFTERGLOW; MAGELLANIC CLOUD; STANDARD STARS; EMISSION; CONNECTION; EVOLUTION AB We report on multi-band (UBVRIZJ(s)K(s)) observations of the host galaxy of the April 18, 2000 gamma-ray burst. The Spectral Energy Distribution (SED) is analysed by fitting empirical and synthetic spectral templates. We find that: (i) the best SED fit is obtained with a starburst template, (ii) the photometric redshift is consistent with the spectroscopic redshift, (iii) the colours of the host are inconsistent with an old stellar population, and (iv) the global extinction is constrained to be in the range A(V) = 0.12-0.61 mag. The derived global extinction agrees with the one reported for the afterglow (A(V) = 0.4-0.9 mag), suggesting a homogeneous distribution of the interstellar medium (ISM) in the host galaxy. These findings are supplemented by morphological information from Hubble Space Telescope (HST) imaging: the surface brightness profile is smooth, symmetric and compact with no underlying structures (like dust lanes, spiral arms or disks). A natural scenario which accounts of all the above results is a nuclear starburst that harbours a young population of stars from which the GRB originated. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Thuringer Landessternwarte Tautenberg, D-07778 Tautenburg, Germany. Inst Astrophys, D-14482 Potsdam, Germany. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. European So Observ, Santiago 19, Chile. Real Inst & Observ Armadda, Secc Astron, Cadiz, Spain. Osserv Astron Trieste, I-34131 Trieste, Italy. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. CNR, Ist Tecnol & Studio Radiaz Extraterr, I-40129 Bologna, Italy. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. RP Gorosabel, J, CSIC, Inst Astrofis Andalucia, POB 03004, E-18080 Granada, Spain. NR 53 TC 24 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2003 VL 409 IS 1 BP 123 EP 133 DI 10.1051/0004-6361:20031047 PG 11 SC Astronomy & Astrophysics GA 721LQ UT ISI:000185318200012 ER PT J AU Bouvier, J Grankin, KN Alencar, SHP Dougados, C Fernandez, M Basri, G Batalha, C Guenther, E Ibrahimov, MA Magakian, TY Melnikov, SY Petrov, PP Rud, MV Osorio, MRZ TI Eclipses by circumstellar material in the T Tauri star AA Tau - II. Evidence for non-stationary magnetospheric accretion SO ASTRONOMY & ASTROPHYSICS DT Article DE accretion, accretion disks; stars : pre-main sequence; stars : magnetic fields; stars : individual : AA Tau ID LINKED ECHELLE SPECTROGRAPH; EMISSION-LINE DIAGNOSTICS; YOUNG STELLAR OBJECTS; ESO 1.52-M TELESCOPE; TIME-SERIES ANALYSIS; MAGNETIC-FIELD; SU-AURIGAE; MAGNETOHYDRODYNAMIC SIMULATIONS; MOLECULAR CLOUD; DISK ACCRETION AB We report the results of a synoptic study of the photometric and spectroscopic variability of the classical T Tauri star AA Tau on timescales ranging from a few hours to several weeks. The AA Tau light curve had been previously shown to vary with a 8.2 d period, exhibiting a roughly constant brightness level, interrupted by quasi-cyclic fading episodes, which we interpreted as recurrent eclipses of the central star by the warped inner edge of its accretion disk (Bouvier et al. 1999). Our observations show the system is dynamic and presents non-stationary variability both in the photometry and spectroscopy. The star exhibits strong emission lines that show substantial variety and variability in their profile shapes and fluxes. Emission lines such as Halpha and Hbeta show both infall and outflow signatures and are well reproduced by magnetospheric accretion models with moderate mass accretion rates (10(-8)- 10(-9) M-. yr(-1)) and high inclinations (i greater than or equal to 60degrees). The veiling shows variations that indicate the presence of 2 rotationally modulated hot spots corresponding to the two magnetosphere poles. It correlates well with the He i line flux, with B - V and the V excess flux. We have indications of a time delay between the main emission lines (Halpha, Hbeta and He I) and veiling, the lines formed farther away preceding the veiling changes. The time delay we measure is consistent with accreted material propagating downwards the accretion columns at free fall velocity from a distance of about 8 R-star. In addition, we report periodic radial velocity variations of the photospheric spectrum which might point to the existence of a 0.02 M-. object orbiting the star at a distance of 0.08 AU. During a few days, the eclipses disappeared, the variability of the system was strongly reduced and the line fluxes and veiling severely depressed. We argue that this episode of quiescence corresponds to the temporary disruption of the magnetic configuration at the disk inner edge. The smooth radial velocity variations of inflow and outflow diagnostics in the Halpha profile yield further evidence for large scale variations of the magnetic configuration on a timescale of a month. These results may provide the first clear evidence for large scale instabilities developping in T Tauri magnetospheres as the magnetic field lines are twisted by differential rotation between the star and the inner disk. The interaction between the inner accretion disk and the stellar magnetosphere thus appears to be a highly dynamical and time dependent process. C1 Univ Grenoble 1, Observ Grenoble, Astrophys Lab, F-38041 Grenoble 9, France. Uzbek Acad Sci, Astron Inst, Tashkent 700052, Uzbekistan. UFMG, ICEx, Dept Fis, BR-30161970 Belo Horizonte, MG, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. CNPq, Observ Nacl, BR-20920400 Rio De Janeiro, Brazil. Karl Schwarzschild Observ, Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Byurakan Astrophys Observ, Byurakan 378433, Aragatsotn Prov, Armenia. Crimean Astrophys Observ, UA-98409 Crimea, Ukraine. Isaac Newton Inst chile, Crimean Branch, UA-98409 Crimea, Ukraine. Fessenkov Astrophys Inst, Almaty 480068, Kazakhstan. INTA, LAEFF, Madrid 28080, Spain. RP Bouvier, J, Univ Grenoble 1, Observ Grenoble, Astrophys Lab, BP 53, F-38041 Grenoble 9, France. NR 80 TC 33 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2003 VL 409 IS 1 BP 169 EP 192 DI 10.1051/0004-6361:20030938 PG 24 SC Astronomy & Astrophysics GA 721LQ UT ISI:000185318200017 ER PT J AU Chini, R Kampgen, K Reipurth, B Albrecht, M Kreysa, E Lemke, R Nielbock, M Reichertz, LA Sievers, A Zylka, R TI SIMBA observations of the R Corona Australis molecular cloud SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : dust, extinction; stars : circumstellar matter; stars : formation ID MAIN-SEQUENCE STARS; YOUNG STELLAR OBJECTS; HERBIG-HARO OBJECTS; CRA DARK CLOUD; T-TAURI STARS; INFRARED OBSERVATIONS; FORMATION REGION; COLD DUST; EMISSION; OUTFLOWS AB We have mapped the R Corona Australis molecular cloud at 1.2 mm with SIMBA on SEST and detected 25 distinct dust emission peaks. While 7 of them coincide with positions of previously known young stars, 18 are seemingly not associated with any known stellar object. We discuss the nature of individual sources and conclude that there are at least four small concentrations of young objects located along the filamentary shaped cloud. A comparison with (CO)-O-18 data hints at the depletion of molecules in some of the cores. Our new results yield some conflicting arguments about whether star formation proceeds from north-west to south-east in the R Cr A cloud. C1 Ruhr Univ Bochum, Astron Inst, D-44780 Bochum, Germany. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. Max Planck Inst Radioastron, D-53121 Bonn, Germany. European So Observ, SEST, Santiago 19, Chile. IRAM, E-18012 Granada, Spain. Univ Cologne, Inst Phys 1, D-50937 Cologne, Germany. RP Chini, R, Ruhr Univ Bochum, Astron Inst, Univ Str 150, D-44780 Bochum, Germany. NR 51 TC 21 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2003 VL 409 IS 1 BP 235 EP + DI 10.1051/0004-6361:20031115 PG 13 SC Astronomy & Astrophysics GA 721LQ UT ISI:000185318200021 ER PT J AU Nelson, JL Lambert, NC Brautbar, C El-Gabalaway, H Fraser, P Gorodezky, C Jonas, B Konenkov, V Martin, J Moxley, G Oen, K Papasteriades, C Schroeder, M Tikly, M Vejbaesya, S Yoo, B Lathrop, M Thorsby, E Thomsen, G McWeeney, S TI The 13th International Histocompatibility Working Group for rheumatoid arthritis joint report. SO ARTHRITIS AND RHEUMATISM LA English DT Meeting Abstract C1 Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA. Hadassah Med Ctr, IL-91120 Jerusalem, Israel. Univ Manitoba, Winnipeg, MB, Canada. Brigham & Womens Hosp, Boston, MA 02115 USA. SSA, InDRE, Inst Diagnost & Referencia Epidemiol, Mexico City, DF, Mexico. Univ N Carolina, Chapel Hill, NC USA. SB AMS, Inst Clin Immunol, Novosibirsk, Russia. Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Virginia Commonwealth Univ, Richmond, VA USA. Evangelismos Hosp, Athens, Greece. Univ Manitoba, Winnipeg, MB, Canada. Chris Hani Baragwanath Hosp, Johannesburg, South Africa. Univ Witwatersrand, Johannesburg, South Africa. Mahidol Univ, Siriraj Hosp, Bangkok, Thailand. Univ Ulsan, Coll Med, Asan Med Ctr, Seoul, South Korea. Ctr Natl Genotypage, Paris, France. Rikshospitalet Univ Hosp, Oslo, Norway. Univ Calif Berkeley, Berkeley, CA 94720 USA. Oregon Hlth Sci Univ, Portland, OR 97201 USA. NR 0 TC 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0004-3591 J9 ARTHRITIS RHEUM JI Arthritis Rheum. PD SEP PY 2003 VL 48 IS 9 SU Suppl. S BP S143 EP S143 PG 1 SC Rheumatology GA 723LA UT ISI:000185432800309 ER PT J AU Marquez, I Masegosa, J Durret, F Delgado, RMG Moles, M Maza, J Perez, E Roth, M TI The detection of stellar velocity dispersion drops in the central regions of five isolated Seyfert spirals SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : spiral; galaxies : kinematics and dynamics; galaxies : structure; galaxies : interactions ID ACTIVE GALACTIC NUCLEI; NEAR-INFRARED PHOTOMETRY; DISK GALAXIES; CIRCUMNUCLEAR DUST; INACTIVE GALAXIES; BARS; KINEMATICS; MORPHOLOGY; TRIPLET; AGN AB We analyze the kinematics of the central regions of five isolated Seyfert spiral galaxies from the DEGAS sample (four with new data presented in this paper, IC 184, UGC 3223, NGC 2639, NGC 6814, and NGC 6951 from our previous data), by using long slit spectroscopy in the CaII triplet range (at approximate to8600 Angstrom) obtained with a 4 m-class telescope. A drop of the velocity dispersions in the innermost +/-(1-3) arcsec is observed in four of them, and hinted at in the remaining galaxy (NGC 6814). The available HST images for our sample together with another nine galaxies with reported velocity dispersion drops are also used to investigate the presence of morphological inner structures at the scales of the kinematical drops. Evidence for disk-like shapes is found in 12 out of the 14 cases. The only exceptions are NGC 6814 and NGC 6951. Existing N-body simulations including stars, gas and star formation predict that such a drop is most probably due to a young stellar population born from dynamically cold gas accreted in a circumnuclear disk formed during an episode of central gas accretion driven by a bar. The equivalent widths of the calcium triplet lines for our 5 galaxies have been measured. Even if the profiles could be formally consistent with constant EW(CaT) values, they seem to indicate the presence of a local maximum in the regions corresponding spatially to the drops; if confirmed, this would imply the presence of a different stellar population, whose properties could help constrain the models. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Chile, Dept Astron, Santiago, Chile. Observ Carnegie Inst Washington, Pasadena, CA 91101 USA. RP Marquez, I, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. NR 46 TC 17 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2003 VL 409 IS 2 BP 459 EP 467 DI 10.1051/0004-6361:20031059 PG 9 SC Astronomy & Astrophysics GA 725FW UT ISI:000185534000011 ER PT J AU Gotz, D Mereghetti, S Hurley, K Deluit, S Feroci, M Frontera, F Fruchter, A Gorosabel, J Hartmann, DH Hjorth, J Hudec, R Mirabel, IF Pian, E Pizzichini, G Ubertini, P Winkler, C TI Observation of GRB 030131 with the INTEGRAL satellite SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; gamma rays : observations ID GAMMA-RAY BURST; 28 FEBRUARY 1997; BATSE OBSERVATIONS; OPTICAL-EMISSION; AFTERGLOW; SPECTRA; DISCOVERY AB A long Gamma-Ray Burst (GRB) was detected with the instruments on board the INTEGRAL satellite on January 31 2003. Although most of the GRB, which lasted similar to150 s, occurred during a satellite slew, the automatic software of the INTEGRAL Burst Alert System was able to detect it in near-real time. Here we report the results obtained with the IBIS instrument, which detected GRB 030131 in the 15 keV-200 keV energy range, and ESO/VLT observations of its optical transient. The burst displays a complex time profile with numerous peaks. The peak spectrum can be described by a single power law with photon index Gamma similar or equal to 1.7 and has a flux of similar to2 photons cm(-2) s(-1) in the 20-200 keV energy band. The high sensitivity of IBIS has made it possible for the first time to perform detailed time-resolved spectroscopy of a GRB with a fluence of 7 x 10(-6) erg cm(-2) (20-200 keV). C1 CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Milano G Occhialini, I-20133 Milan, Italy. Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Integral Sci Data Ctr, CH-1290 Versoix, Switzerland. CNR, Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, Italy. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Acad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech Republic. CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France. Osserv Astron Trieste, I-34131 Trieste, Italy. ESA, ESTEC, RSSD, NL-2201 AZ Noordwijk, Netherlands. Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Gotz, D, CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Milano G Occhialini, Via Bassini 15, I-20133 Milan, Italy. NR 29 TC 6 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2003 VL 409 IS 3 BP 831 EP 834 DI 10.1051/0004-6361:20031128 PG 4 SC Astronomy & Astrophysics GA 725ZJ UT ISI:000185572300010 ER PT J AU Azcon, R Ambrosano, E Charest, C TI Nutrient acquisition in mycorrhizal lettuce plants under different phosphorus and nitrogen concentration SO PLANT SCIENCE DT Article DE arbuscular mycorrhiza; N-P interaction; nutrient assimilation; specific absorption rate (SAR) ID ZEA-MAYS L; VESICULAR-ARBUSCULAR MYCORRHIZAE; LACTUCA-SATIVA L; RHIZOSPHERE MICROORGANISMS; MINERAL ACQUISITION; GROWTH-RESPONSES; EXTERNAL HYPHAE; FUNGI; SOIL; MAIZE AB This study aimed to determine the combined effects of N (1, 5 or 9 mM) and P (0.1 or 0.5 mM) fertilization on mycorrhizal and non-mycorrhizal lettuces. Plant growth, macro and micronutrient assimilation, and specific absorption rate (SAR) were measured. Arbuscular mycorrhizal (AM) colonization and extraradical mycelium development were also examined. The high availability of N and P in the soil reduced the content of macro and micronutrients in AM plants. At the lowest P application (0.1 mM), the AM colonization increased nutrient acquisition at all N levels tested. However, the highest application of N and P to the soil reduced the uptake of N, P, K, Mn and Zn in AM compared to non-AM lettuce plants. These fertilizer levels were also inhibitory to AM-intra and extraradical colonization. In contrast to non-AM plants, AM colonization increased SAR values at the lowest N and P levels for nearly all the nutrients, and decreased the amount of nutrients absorbed per unit of root mass at the highest N and P levels applied. Results demonstrated some negative effects of high N and P application in soil on the acquisition of N, P, K, Fe, Mn and Zn for mycorrhizal plants. (C) 2003 Elsevier Ireland Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Inst Agron Campinas, Dept Crop Prod Syst, Campinas, SP, Brazil. Univ Ottawa, Dept Biol, Ottawa, ON K1N 6N5, Canada. RP Azcon, R, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1, E-18008 Granada, Spain. NR 50 TC 12 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0168-9452 J9 PLANT SCI JI Plant Sci. PD NOV PY 2003 VL 165 IS 5 BP 1137 EP 1145 DI 10.1016/S0168-9452(03)00322-4 PG 9 SC Biochemistry & Molecular Biology; Plant Sciences GA 729ZX UT ISI:000185805700025 ER PT J AU Magaraci, F Jimenez, CJ Rodrigues, C Rodrigues, JCF Braga, MV Yardley, V de Luca-Fradley, K Croft, SL de Souza, W Ruiz-Perez, LM Urbina, J Pacanowska, DG Gilbert, IH TI Azasterols as inhibitors of sterol 24-methyltransferase in leishmania species and Trypanosoma cruzi SO JOURNAL OF MEDICINAL CHEMISTRY LA English DT Article ID METHYL TRANSFERASE INHIBITORS; SCHIZOTRYPANUM CRUZI; IN-VITRO; ULTRASTRUCTURAL ALTERATIONS; KETOCONAZOLE; DONOVANI; GROWTH; BIOSYNTHESIS; COMBINATIONS; MECHANISM AB This paper describes the synthesis of some novel azasterols based on (20R,22xi)-5alpha-pregnan-20-(piperidin-2-yl)-3beta,20-diol. These compounds are potential inhibitors of the enzyme sterol 24-methyltransferase (24-SMT), which is a vital enzyme in the biosynthesis of ergosterol and related 24-alkyl sterols. Structure-activity studies were undertaken to understand the important features for activity against the enzyme, with the aim of increasing activity and selectivity. The compounds were evaluated for inhibition of recombinant Leishmania major 24-SMT and the effect of compounds on sterol composition and parasite proliferation. Essentially, compounds which showed good activity against the recombinant enzyme had a significant effect on the sterol composition and growth of parasites. The activity of compounds was found to be related to the basicity and stereochemical location of the nitrogen. Also, presence of an unprotected 3beta-OH seemed to be important for activity. However, some azasterols which were not good inhibitors of 24-SMT also showed antiproliferative activity, suggesting that there may be other modes of actions of these compounds. C1 Univ Wales Coll Cardiff, Welsh Sch Pharm, Cardiff CF10 3XF, S Glam, Wales. Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Inst Venezolano Invest Cient, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020A, Venezuela. Univ Fed Rio de Janeiro, Ctr Ciencias Saude, Inst Biofis Carlos Chagas Filho, Lab Ultraestrutura Celular Hertha Meyer, BR-21949900 Rio De Janeiro, Brazil. London Sch Hyg & Trop Med, London WC1E 7HT, England. RP Gilbert, IH, Univ Wales Coll Cardiff, Welsh Sch Pharm, Redwood Bldg,King Edward VII Ave, Cardiff CF10 3XF, S Glam, Wales. NR 22 TC 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-2623 J9 J MED CHEM JI J. Med. Chem. PD OCT 23 PY 2003 VL 46 IS 22 BP 4714 EP 4727 DI 10.1021/jm021114j PG 14 SC Chemistry, Medicinal GA 733GG UT ISI:000185991100012 ER PT J AU Gavazzi, G Cortese, L Boselli, A Iglesias-Paramo, J Vilchez, JM Carrasco, L TI Capturing a star formation burst in galaxies infalling onto the cluster A1367 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : individual (A1367); galaxies : dwarf; galaxies : evolution ID BRIGHTEST SPIRAL GALAXIES; COMPACT-GROUPS; DISK GALAXIES; LUMINOSITY FUNCTION; INTRACLUSTER MEDIUM; NEARBY CLUSTERS; DWARF GALAXIES; VIRGO CLUSTER; COMA; SAMPLE AB The discovery of a striking astrophysical laboratory in the cluster of galaxies A1367 by Sakai and coworkers is confirmed with independent imaging and spectroscopic observations and further investigated in the present analysis. Two giant and 10 dwarf/ H II galaxies, members of a group, are simultaneously undergoing a burst of star formation. Redshift measurements suggest that the group galaxies are in the process of falling into the cluster at very high speed. We explore two possible mechanisms that could have triggered the short-lived stellar burst that we are witnessing: the first, internal to the group itself, via tidal interactions among its members, the hypothesis favored by Sakai et al.; the second associated with the high-velocity infall of the group galaxies into the cluster intergalactic medium. We present evidence in favor of and against the two hypotheses. C1 Univ Studi Milano Bicocca, I-20126 Milan, Italy. Lab Astrophys Marseille, F-13376 Marseille, France. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico. Univ Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22860, Baja California, Mexico. RP Gavazzi, G, Univ Studi Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy. NR 31 TC 16 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 2003 VL 597 IS 1 PN Part 1 BP 210 EP 217 PG 8 SC Astronomy & Astrophysics GA 736KW UT ISI:000186170800019 ER PT J AU Castro-Tirado, AJ Gorosabel, J Guziy, S Reverte, D Ceron, JMC Postigo, AD Tanvir, N Mereghetti, S Tiengo, A Buckle, J Sagar, R Pandey, SB Mohan, V Masetti, N Mannucci, F Feltzing, S Lundstrom, I Pedersen, H Riess, C Trushkin, S Vilchez, J Lund, N Brandt, S Nunez, SM Reglero, V Perez-Ramirez, MD Klose, S Greiner, J Hjorth, J Kaper, L Pian, E Palazzi, E Andersen, MI Fruchter, A Fynbo, JPU Jensen, BL Kouveliotou, C Rhoads, J Rol, E Vreeswijk, PM Wijers, RAMJ van den Heuvel, E TI GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; techniques : photometric; cosmology : observations ID GAMMA-RAY BURST; OPTICAL AFTERGLOW; LIGHT CURVES; WIND; EMISSION AB We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and similar to1.7 days after the event. Here we report the discovery of a dim optical afterglow (OA) that would not have been detected by many previous searches due to its faintess (R similar to 23). This OA was seen to decline following a power law decay with index alpha(R) = - 0.95 +/- 0.16. The spectral index beta(opt/NIR) yielded - 1.25 +/- 0.14. These values may be explained by a relativistic expansion of a fireball ( with p = 2.0) in the cooling regime. We also find evidence for inverse Compton scattering in X-rays. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Milano, I-20133 Milan, Italy. Joint Astron Ctr, Hilo, HI 96720 USA. Uttar Pradesh State Observ, Naini Tal 263129, India. Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. CNR, Ist Radioastron, Sez Firenze, I-50125 Florence, Italy. Lund Observ, S-22100 Lund, Sweden. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. Univ Observ Munich, D-81679 Munich, Germany. RAS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. Univ Valencia, Grp Astrofis & Ciencias Espacio, Valencia 46071, Spain. European Space Agcy, Res Sci Div, Noordwijk, Netherlands. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. Osserv Astron Trieste, I-34131 Trieste, Italy. Inst Astrophys, D-14482 Potsdam, Germany. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. NASA, MSFC, NSSTC, Huntsville, AL 35805 USA. European So Observ, Santiago 19, Chile. RP Castro-Tirado, AJ, CSIC, Inst Astrofis Andalucia, Apartado Correos 3004, E-18080 Granada, Spain. EM ajct@iaa.es NR 35 TC 13 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2003 VL 411 IS 1 BP L315 EP L319 DI 10.1051/0004-6361:20031393 PG 5 SC Astronomy & Astrophysics GA 737JZ UT ISI:000186227800051 ER PT J AU Hjorth, J Moller, P Gorosabel, J Fynbo, JPU Toft, S Jaunsen, AO Kaas, AA Pursimo, T Torii, K Kato, T Yamaoka, H Yoshida, A Thomsen, B Andersen, MI Burud, I Ceron, JMC Castro-Tirado, AJ Fruchter, AS Kaper, L Kouveliotou, C Masetti, N Palazzi, E Pedersen, H Pian, E Rhoads, J Rol, E Tanvir, NR Vreeswijk, PM Wijers, RAMJ van den Heuvel, EPJ TI Very high column density and small reddening toward GRB 020124 at z=3.20 SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; dust, extinction; galaxies : abundances; galaxies : ISM; gamma rays : bursts ID GAMMA-RAY BURSTS; LY-ALPHA GALAXIES; TIME-DEPENDENT PHOTOIONIZATION; INFRARED EXTINCTION LAW; HUBBLE-SPACE-TELESCOPE; HIGH-REDSHIFT GALAXIES; LYMAN-BREAK GALAXIES; OPTICAL AFTERGLOW; HOST GALAXY; MAGELLANIC CLOUD AB We present optical and near-infrared observations of the dim afterglow of GRB 020124, obtained between 2 and 68 hr after the gamma-ray burst. The burst occurred in a very faint (Rgreater than or similar to29.5) damped Lyalpha absorber (DLA) at a redshift of z=3.198+/-0.004. The derived column density of neutral hydrogen is log(N-Hi)=21.7+/-0.2, and the rest-frame reddening is constrained to be E(B-V)<0.065, i.e., A(V)<0.20 for standard extinction laws with R-V&AP;3. The resulting dust-to-gas ratio is less than 11% of that found in the Milky Way but consistent with the SMC and high-redshift QSO DLAs, indicating a low metallicity and/or a low dust-to-metal ratio in the burst environment. A gray extinction law (large R-V), produced through preferential destruction of small dust grains by the gamma-ray burst, could increase the derived A(V) and dust-to-gas ratio. The dimness of the afterglow is, however, fully accounted for by the high redshift: if GRB 020124 had been at z=1, it would have been approximately 1.8 mag brighter-in the range of typical bright afterglows. C1 Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. European So Observ, D-85748 Garching, Germany. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. European So Observ, Santiago 19, Chile. Nord Opt Telescope, E-38700 Santa Cruz De La Palma, Canary Islands, Spain. RIKEN, Cosm Radiat Lab, Wako, Saitama 3510198, Japan. Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan. Kyushu Univ, Fac Sci, Dept Phys, Chuo Ku, Fukuoka 8108560, Japan. Aoyama Gakuin Univ, Dept Phys, Tokyo 1578572, Japan. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Real Inst, Cadiz 11110, Spain. Observ Armada, Secc Astron, Cadiz 11110, Spain. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. NASA, Univ Res Assoc, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. CNR, IASF, Sez Bologna, I-40129 Bologna, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. RP Hjorth, J, Univ Copenhagen, Astron Observ, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark. EM jens@astro.ku.dk NR 48 TC 58 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 2003 VL 597 IS 2 PN Part 1 BP 699 EP 705 PG 7 SC Astronomy & Astrophysics GA 740ZG UT ISI:000186432700006 ER PT J AU Gonzalez, M de Pablo, J Valdes, M TI The clinical confusion about delirium SO REVISTA MEDICA DE CHILE LA Spanish DT Review DE brain diseases; delirium; dementia; amnestic; cognitive disorders; frail elderly ID HOSPITALIZED OLDER PATIENTS; RISK-FACTORS; ATYPICAL ANTIPSYCHOTICS; POSTOPERATIVE DELIRIUM; PREVENT DELIRIUM; OLANZAPINE; TRIAL; INTERVENTION; RECOGNITION; UNIT AB Delirium or acute confusional state is a condition that lies within the boundaries of psychiatry and other medical specialties. It is defined as a syndrome characterized by a fluctuating cognitive impairment of acute onset. The pathogenesis is multifactorial and it frequently appears in elderly patients admitted to general hospitals Delirium carries a high mortality and it prolongs hospital stay. its diagnosis if often overlooked and the treatment is inadequate or belated . This article discusses the most efficient procedures to diagnose and treat delirium. The review was based on a systematic search in the literature using the key words delirium, acute mental syndrome, acute confusional state and organic mental syndrome. Articles were selected according to their relevance and methodological accuracy. C1 Hosp Clin Univ Barcelona, Secc Psiquiat Enlace, Inst Clin Psiquiat & Psicol, Barcelona, Spain. Pontificia Univ Catolica Chile, Dept Psiquiat, Hosp Clin, Santiago, Chile. Univ Barcelona, Hosp Clin, Inst Clin Psiquiat & Psicol, E-08007 Barcelona, Spain. Univ Barcelona, Progrema Neurociencias, E-08007 Barcelona, Spain. RP de Pablo, J, Av Villarroel 170, Barcelona 08036, Spain. EM JDEPABLO@clinic.ul.es NR 45 TC 3 PU SOC MEDICA SANTIAGO PI SANTIAGO 9 PA BERNARDA MORIN 488 PROVIDENCIA, CASILLA 168 CORREO 55, SANTIAGO 9, CHILE SN 0034-9887 J9 REV MED CHILE JI Rev. Medica Chile PD SEP PY 2003 VL 131 IS 9 BP 1051 EP 1060 PG 10 SC Medicine, General & Internal GA 741TH UT ISI:000186475300013 ER PT J AU Toledano, M Osorio, R Ceballos, L Fuentes, MV Fernandes, CAO Tay, FR Carvalho, RM TI Microtensile bond strength of several adhesive systems to different dentin depths SO AMERICAN JOURNAL OF DENTISTRY DT Article ID SELF-ETCHING PRIMER; HYBRID LAYER; RESIN COMPOSITE; SMEAR LAYERS; MICROLEAKAGE; AGENTS; ENAMEL; ACID; AGGRESSIVENESS; INTERFACE AB Purpose: To determine the bond strength of five adhesives systems to either superficial or deep dentin. Methods: Extracted human third molars had their crowns transversally sectioned either next to the occlusal DEJ or next to the pulp, to expose flat, superficial or deep dentin surfaces. The surfaces were bonded with: 1) three two-step, total-etch, self-priming adhesives (Single Bond, Prime&Bond NT, and Excite), 2) a two-step, self-etching primer (Clearfil SE Bond), and 3) a single-step, self-etching all-in-one adhesive (Etch & Prime 3.0) according to manufacturers' directions. Composite build-ups were constructed incrementally with Z250. After storage for 24 hours in water at 37degreesC, the teeth were sectioned to obtain several bonded beams of 1.0 mm(2) cross-sectional area. Each beam was tested in tension in an Instron machine at 0.5 mm/minute. Results were analyzed by two-way ANOVA and post-hoc multiple comparisons (P= 0.05). Bonded interfaces were also examined by TEM. Nanoleakage was examined using a silver-staining technique. Results: Single Bond, Prime&Bond NT and Clearfil SE Bond performed equally when were bonded to superficial dentin; the lowest value was obtained with Etch & Prime 3.0. On deep dentin, the highest bond strengths were attained with Clearfil SE Bond and Prime&Bond NT. The bond strengths of Prime&Bond NT and Excite were significantly higher to deep than to superficial dentin and the rest of the adhesives showed similar bond strength to both dentin depths. Nanoleakage was manifested to variable extent within all hybrid layers examined. C1 Fed Univ Ceara, Dept Restorat Dent, Fortaleza, Ceara, Brazil. Univ Hong Kong, Fac Dent, Dept Conservat Dent, Hong Kong, Hong Kong, Peoples R China. Univ Sao Paulo, Bauru Sch Dent, Dept Operat Dent Endodont & Dent Mat, BR-05508 Sao Paulo, Brazil. RP Toledano, M, Avda Fuerzas Armadas 1,1B, Granada 18014, Spain. NR 58 TC 30 PU MOSHER & LINDER, INC PI WESTON PA 318 INDIAN TRACE #500, WESTON, FL 33326 USA SN 0894-8275 J9 AM J DENTISTRY JI Am. J. Dent. PD OCT PY 2003 VL 16 IS 5 BP 292 EP 298 PG 7 SC Dentistry, Oral Surgery & Medicine GA 744PD UT ISI:000186640100002 ER PT J AU Nieto, A Sanchez, MJ Martinez, C Castellsague, X Quintana, MJ Bosch, X Conde, M Munoz, N Herrero, R Franceschi, S TI Lifetime body mass index and risk of oral cavity and oropharyngeal cancer by smoking and drinking habits SO BRITISH JOURNAL OF CANCER LA English DT Article DE alcohol; body mass index; cancer of oral cavity and oropharynx; leanness; smoking ID SQUAMOUS-CELL CARCINOMA; PHARYNGEAL CANCER; MORTALITY; ALCOHOL AB The influence of body mass index (BMI) on oral cancer risk was evaluated in 375 incident cases and 375 age-gender-matched hospital-based controls. Low BMIs at diagnosis and 2 years before diagnosis were associated with significantly elevated odds ratios (OR for BMI less than or equal to22 vs >26 kg m(-2); 3.64; 95% confidence interval, CI:2.27-5.82 and 3.31; 95% CI:2.04-5.39, respectively). The association with low BMI, however, tended to be weaker and nonsignificant among never smokers and never drinkers. C1 Univ Sevilla, Fac Med, Dept Ciencias Sociosanitarias, E-41009 Seville, Spain. Escuela Andaluza Salud Publ, Granada, Spain. Inst Catala Oncol, Barcelona, Spain. Int Agcy Res Canc, F-69372 Lyon, France. Costa Rican Fdn Hlth Sci, Proyecto Epidemiol Guanacaste, San Jose, Costa Rica. RP Nieto, A, Univ Sevilla, Fac Med, Dept Ciencias Sociosanitarias, Avda Sanchez Pizjuan S-N, E-41009 Seville, Spain. NR 23 TC 5 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0007-0920 J9 BRIT J CANCER JI Br. J. Cancer PD NOV 3 PY 2003 VL 89 IS 9 BP 1667 EP 1671 DI 10.1038/sj.bjc.6601347 PG 5 SC Oncology GA 747DG UT ISI:000186789500014 ER PT J AU Baez, ME Aponte, A Snchez-Rasero, F TI Microwave-assisted solvent extraction of the herbicide methabenzthiazuron from soils and some soil natural organic and inorganic constituents. Influence of environmental factors on its extractability SO ANALYST LA English DT Article ID PHASE LIQUID-CHROMATOGRAPHY; UV DETECTION; METHABENZTHIAZURON; PESTICIDES; AMENDMENT; RESIDUES; FATE AB A microwave-assisted solvent extraction (MASE) method for the determination of methabenzthiazuron (MBT) in soil samples by HPLC-DAD ( diode array detection) was evaluated. Spiked soil samples having different physico-chemical properties, and selected soil-derived matrices with diverse MBT adsorption capacity, characterized by their Freundlich equation K-f values, were used to verify the method applicability to a broad range of different soils. The spiking procedure was considered a crucial point to reproduce as closely as possible the solute - soil adsorption taking place in the natural environment. Ageing effects, where the compound could diffuse into inaccessible locations within the soil matrix in view of its great stability, were considered of particular concern. In spite of the heterogeneous physico-chemical properties of soils under study, recoveries were greater than 90%. Performance of the MASE procedure correlated highly with the adsorption capacity of soil-derived matrices: the lowest recoveries were for illite ( 67 - 73%), among the mineral surfaces, and for a humic acid ( 67 - 72%), among the organic fractions. Intra-assay variation for each type of sample soil range from 0.40 to 3.89% (RSD). Limits of detection and quantification were 0.047 and 0.15 mug g(-1), respectively. Analyte residence time was not a very significant factor on the extractability. C1 Univ Chile, Fac Chem & Pharmaceut Sci, Dept Inorgan & Analyt Chem, Santiago, Chile. CSIC, Estac Expt Zaidin, Granada, Spain. RP Baez, ME, Univ Chile, Fac Chem & Pharmaceut Sci, Dept Inorgan & Analyt Chem, Casilla 233, Santiago, Chile. NR 22 TC 4 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 0003-2654 J9 ANALYST JI Analyst PY 2003 VL 128 IS 12 BP 1478 EP 1484 DI 10.1039/b312288c PG 7 SC Chemistry, Analytical GA 750MN UT ISI:000187000500015 ER PT J AU Herrero, R Castellsague, X Pawlita, M Lissowska, J Kee, F Balaram, P Rajkumar, T Sridhar, H Rose, B Pintos, J Fernandez, L Idris, A Sanchez, MJ Nieto, A Talamini, R Tavani, A Bosch, FX Reidel, U Snijders, PJF Meijer, CJLM Viscidi, R Munoz, N Franceschi, S CA IARC Multicenter Oral Canc Study G TI Human papillomavirus and oral cancer: The international agency for research on cancer multicenter study SO JOURNAL OF THE NATIONAL CANCER INSTITUTE LA English DT Article ID SQUAMOUS-CELL CARCINOMA; POLYMERASE CHAIN-REACTION; INVASIVE CERVICAL-CANCER; TONSILLAR CARCINOMAS; RAPID DETECTION; EARLY PROTEINS; NECK CANCERS; HPV TYPE-16; RISK FACTOR; HEAD AB Background: Human papillomavirus (HPV), the causal agent of cervical cancer, appears to be involved in the etiology of cancer of the oral cavity and oropharynx. To investigate these associations, we conducted a multicenter case-control study of cancer of the oral cavity and oropharynx in nine countries. Methods: We recruited 1670 case patients (1415 with cancer of the oral cavity and 255 with cancer of the oropharynx) and 1732 control subjects and obtained an interview, oral exfoliated cells, and blood from all participants and fresh biopsy specimens from case patients. HPV DNA was detected by polymerase chain reaction (PCR). Antibodies against HPV16 L1, E6, and E7 proteins in plasma were detected with enzyme-linked immunosorbent assays. Multivariable models were used for case-control and case-case comparisons. Results: HPV DNA was detected in biopsy specimens of 3.9% (95% confidence interval [CI] = 2.5% to 5.3%) of 766 cancers of the oral cavity with valid PCR results and 18.3% (95% CI = 12.0% to 24.7%) of 142 cancers of the oropharynx (oropharynx and tonsil combined) with valid PCR results. HPV DNA in cancer biopsy specimens was detected less frequently among tobacco smokers and paan chewers and more frequently among subjects who reported more than one sexual partner or who practiced oral sex. HPV16 DNA was found in 94.7% of HPV DNA-positive case patients. HPV DNA in exfoliated cells was not associated with cancer risk or with HPV DNA detection in biopsy specimens. Antibodies against HPV16 L1 were associated with risk for cancers of the oral cavity (odds ratio [OR] = 1.5, 95% CI = 1.1 to 2.1) and the oropharynx (OR = 3.5, 95% CI = 2.1 to 5.9). Antibodies against HPV16 E6 or E7 were also associated with risk for cancers of the oral cavity (OR = 2.9, 95% CI = 1.7 to 4.8) and the oropharynx (OR = 9.2. 95% CI = 4.8 to 17.7). Conclusions: HPV appears to play an etiologic role in many cancers of the oropharynx and possibly a small subgroup of cancers of the oral cavity. The most common HPV type in genital cancers (HPV16) was also the most common in these tumors. The mechanism of transmission of HPV to the oral cavity warrants further investigation. C1 Costa Rican Fdn Hlth Sci, Proyecto Epidemiol Guanacaste, San Jose, Costa Rica. Int Agcy Res Canc, F-69372 Lyon, France. Inst Catala Oncol, Barcelona, Spain. Deutsch Krebsforschungszentrum, D-6900 Heidelberg, Germany. Ctr Canc, Warsaw, Poland. Inst Oncol, Warsaw, Poland. Queens Univ Belfast, Belfast, Antrim, North Ireland. Reg Canc Ctr, Trivandrum 695011, Kerala, India. Women India Assoc, Inst Canc, Madras, Tamil Nadu, India. Kidwai Mem Inst Oncol, Bangalore, Karnataka, India. Royal Prince Alfred Hosp, Sydney Head & Neck Canc Inst, Sydney, NSW, Australia. Univ Sydney, Sydney, NSW 2006, Australia. McGill Univ, Montreal, PQ, Canada. Inst Nacl Oncol & Radiobiol, Havana, Cuba. Toombak & Smoking Res Ctr, Khartoum, Sudan. Escuela Andaluza Salud Publ, Granada, Spain. Fac Med, Seville, Spain. Ctr Riferimento Oncol, I-33081 Aviano, Italy. Ist Ric Farmacol Mario Negri, Milan, Italy. Vrije Univ Amsterdam, Med Ctr, Amsterdam, Netherlands. Johns Hopkins Univ, Sch Med, Dept Pediat, Stanley Div Dev Neurovirol, Baltimore, MD 21205 USA. RP Herrero, R, Costa Rican Fdn Hlth Sci, Proyecto Epidemiol Guanacaste, POB 125-6151, San Jose, Costa Rica. NR 38 TC 146 PU OXFORD UNIV PRESS INC PI CARY PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA SN 0027-8874 J9 J NAT CANCER INST JI J. Natl. Cancer Inst. PD DEC 3 PY 2003 VL 95 IS 23 BP 1772 EP 1783 DI 10.1093/jnci/djg/107 PG 12 SC Oncology GA 751RL UT ISI:000187080700011 ER PT J AU Torrelles, JM Patel, NA Anglada, G Gomez, JF Ho, PTP Lara, L Alberdi, A Canto, J Curiel, S Garay, G Rodriguez, LF TI Evidence for evolution of the outflow collimation in very young stellar objects SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (W75); ISM : jets and outflows; masers; stars : formation ID WATER MASERS; BIPOLAR OUTFLOW; STAR-FORMATION; CEPHEUS-A; REGIONS; W75N; EMISSION; SYSTEM; MOTION; SCALE AB We present Very Long Baseline Array proper-motion measurements of water masers toward two young stellar objects (YSOs) of the W75 N star-forming region. We find that these two objects are remarkable for having a similar spectral type, being separated by 0."7 (corresponding to 1400 AU), and sharing the same environment, but with a strikingly different outflow ejection geometry. One source has a collimated, jetlike outflow at a 2000 AU scale, while the other has a shell outflow at a 160 AU scale expanding in multiple directions with respect to a central compact radio continuum source. This result reveals that outflow collimation is not only a consequence of ambient conditions but is something intrinsic to the individual evolution of stars and brings to light the possibility of noncollimated outflows in the earliest stages of YSOs. C1 IEEC, CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan. Univ Granada, Dept Fis Teor & Cosmos, E-18071 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Chile, Dept Astron, Santiago, Chile. UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. NR 30 TC 27 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 2003 VL 598 IS 2 PN Part 2 BP L115 EP L119 PG 5 SC Astronomy & Astrophysics GA 752FM UT ISI:000187149400012 ER PT S AU Gomez, Y Miranda, LF Anglada, G Torrelles, JM TI Water and OH maser emission from the planetary nebula k3-35 SO PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSE SE IAU SYMPOSIA LA English DT Article ID RADIO MORPHOLOGY AB Water-vapour masers, typical of the envelopes in giant stars, are not expected to persist in planetary nebulae due to the ultraviolet radiation of the remnant star that progressively destroys the molecules. Recently, we have reported the first unambiguous detection of water maser emission in a planetary nebula, K 3-35 (Miranda et al. 2001). The water masers in K3-35 were detected at the center of the nebula, along the minor axis, at a radius of similar to85 AU and also at the surprisingly large distance of 5000 AU from the star, at the tips of the bipolar lobes. The existence of these water molecules is puzzling, and probably we are observing the very moment of transformation of a giant star into a planetary nebula. Miranda et al. (2001) also report the presence of polarization in the OH 1665 MHz masers, which are distributed towards the central star in a torus-like structure. Here we review the main results on this source. C1 Natl Autonomous Univ Mexico, Astron Inst, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. CSIC, IEEC, E-08034 Barcelona, Spain. RP Gomez, Y, Natl Autonomous Univ Mexico, Astron Inst, Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico. NR 13 TC 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA SN 0074-1809 J9 IAU SYMP PY 2003 IS 209 BP 263 EP 266 PG 4 SC Astronomy & Astrophysics GA BY04E UT ISI:000187344400075 ER PT S AU Vazquez, R Miranda, LF Olguin, L Torrelles, JM Lopez, JA TI The structure of NGC 6309: BRET or bipolar outflow? SO PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSE SE IAU SYMPOSIA LA English DT Article AB Multiwavelength and multitechnique observations towards NGC 6309 are presented. The data consist of lambda3.6-cm continuum, ground and space-based imaging, and high and low-dispersion longslit spectra. The structure of the central region seems to be a distorted, ring of 20" in diameter. The lack of [N-II] emission is conspicuous, as revealed by imaging and low dispersion spectra. Notably, the kinematics of the point-symmetric (PS) structures of NGC 6309 indicates the presence of lobes or cavities as those generally found in bipolar nebulae. The results lead to conclude that the origin of this peculiar morphology is not related to BRETs, but rather to that of a bipolar PN with PS structures in its lobes. C1 UNAM, Inst Astron, Ensenada, Baja California, Mexico. CSIC, Inst Astrofis Andalucia, Granada, Spain. UNAM, Astron Inst, Mexico City, DF, Mexico. CSIC, IEEC, Barcelona, Spain. CSIC, Inst Ciencias Espacio, Barcelona, Spain. RP Vazquez, R, UNAM, Inst Astron, Ensenada, Baja California, Mexico. NR 0 TC 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA SN 0074-1809 J9 IAU SYMP PY 2003 IS 209 BP 537 EP 538 PG 2 SC Astronomy & Astrophysics GA BY04E UT ISI:000187344400169 ER PT J AU Christensen, L Hjorth, J Gorosabel, J Vreeswijk, P Fruchter, A Sahu, K Petro, L TI The host galaxy of GRB 990712 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : hosts; galaxies : star formation ID GAMMA-RAY BURST; STAR-FORMATION; INTERSTELLAR EXTINCTION; OPTICAL AFTERGLOW; LUMINOSITY FUNCTION; MAGELLANIC CLOUD; GRB 990712; SUPERNOVA; SPECTROSCOPY; COUNTERPART AB We present a comprehensive study of the z = 0.43 host galaxy of GRB 990712, involving ground-based photometry, spectroscopy, and HST imaging. The broad-band UBVRIJHKs photometry is used to determine the global spectral energy distribution (SED) of the host galaxy. Comparison with that of known galaxy types shows that the host is similar to a moderately kreddened starburst galaxy with a young stellar population. The estimated internal extinction in the host is A(V) = 0.15 +/- 0.1 and the star-formation rate (SFR) from the UV continuum is 1.3 +/- 0.3 M-circle dot yr(-1) (not corrected for the effects of extinction). Other galaxy template spectra than starbursts failed to reproduce the observed SED. We also present VLT spectra leading to the detection of Halpha from the GRB host galaxy. A SFR of 2.8 +/- 0.7 M-circle dot yr(-1) is inferred from the Halpha line flux, and the presence of a young stellar population is supported by a large equivalent width. Images from HST/STIS show that the host has two separate knots, which could be two distinct star-forming regions. C1 Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Univ Copenhagen, Niels Bohr Inst, Astron Observ, DK-2100 Copenhagen O, Denmark. CSIC, Inst Astrofis Andalucia, Granada, Spain. INTA, LAEFF, Madrid 28080, Spain. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. European So Observ, Santiago 19, Chile. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Natl Inst Nucl & High Energy Phys, Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Christensen, L, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany. NR 59 TC 12 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 2004 VL 413 IS 1 BP 121 EP 130 DI 10.1051/0004-6361:20031517 PG 10 SC Astronomy & Astrophysics GA 754WT UT ISI:000187356300014 ER PT J AU Greiner, J Klose, S Salvato, M Zeh, A Schwarz, R Hartmann, DH Masetti, N Stecklum, B Lamer, G Lodieu, N Scholz, RD Sterken, C Gorosabel, J Burud, I Rhoads, J Mitrofanov, I Litvak, M Sanin, A Grinkov, V Andersen, MI Ceron, JMC Castro-Tirado, AJ Fruchter, A Fynbo, JU Hjorth, J Kaper, L Kouveliotou, C Palazzi, E Pian, E Rol, E Tanvir, NR Vreeswijk, PM Wijers, RAMJ van den Heuvel, E TI GRB 011121: A collimated outflow into wind-blown surroundings SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts; supernovae : general; techniques : photometric ID GAMMA-RAY BURSTS; LIGHT CURVES; OPTICAL AFTERGLOW; HOST GALAXY; STAR-FORMATION; STELLAR WIND; DUST ECHOES; ERROR BOX; SUPERNOVA; PROGENITORS AB We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the afterglow light curve after 1.3 days, which implies an initial jet opening angle of about 9degrees. The jet origin of this break is supported by the fact that the spectral energy distribution is achromatic during the first 4 days. During later phases, GRB 011121 shows significant excess emission above the flux predicted by a power law, which we interpret as additional light from an underlying supernova. In particular, the spectral energy distribution of the optical transient approximately 2 weeks after the burst is clearly not of power-law type but can be presented by a blackbody with a temperature of similar to6000 K. The deduced parameters for the decay slope and the spectral index favor a wind scenario, i.e., an outflow into a circumburst environment shaped by the stellar wind of a massive gamma-ray burst (GRB) progenitor. Because of its low redshift of z = 0: 36, GRB 011121 has been the best example for the GRB-supernova connection until GRB 030329 and provides compelling evidence for a circumburster wind region expected to exist if the progenitor was a massive star. C1 Inst Astrophys, D-14482 Potsdam, Germany. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Karl Schwarzschild Observ, Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Univ Sternwarte Gottingen, D-37083 Gottingen, Germany. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. Free Univ Brussels, Astrofys Inst, B-1050 Brussels, Belgium. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Russian Acad Sci, Space Res Inst, Moscow 117810, Russia. Real Inst & Observ Armada, Secc Astron, Cadiz 11110, Spain. Lab Astrofis Espacial & Fis Fundamental, Madrid, Spain. Univ Aarhus, Inst Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. Natl Space Sci & Technol Ctr, Huntsville, AL 35805 USA. Osserv Astron Trieste, Ist Nazl Astrofis, I-34131 Trieste, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. European So Observ, Santiago 19, Chile. RP Greiner, J, Inst Astrophys, D-14482 Potsdam, Germany. NR 85 TC 27 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 2003 VL 599 IS 2 PN Part 1 BP 1223 EP 1237 PG 15 SC Astronomy & Astrophysics GA 756DX UT ISI:000187451500038 ER PT J AU Handler, G Shobbrook, RR Jerzykiewicz, M Krisciunas, K Tshenye, T Rodriguez, E Costa, V Zhou, AY Medupe, R Phorah, WM Garrido, R Amado, PJ Paparo, M Zsuffa, D Ramokgali, L Crowe, R Purves, N Avila, R Knight, R Brassfield, E Kilmartin, PM Cottrell, PL TI Asteroseismology of the beta Cephei star nu Eridani - I. Photometric observations and pulsational frequency analysis SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE techniques : photometric; stars : early-type; stars : individual : mu Eridani; stars : individual : nu Eridani; stars : oscillations; stars : variables : other ID WHOLE-EARTH-TELESCOPE; MODE-IDENTIFICATION; OSCILLATIONS; AMPLITUDE; CAMPAIGN AB We undertook a multisite photometric campaign for the beta Cephei star nu Eridani. More than 600 h of differential photoelectric uvyV photometry were obtained with 11 telescopes during 148 clear nights. The frequency analysis of our measurements shows that the variability of nu Eri can be decomposed into 23 sinusoidal components, eight of which correspond to independent pulsation frequencies between 5 and 8 cd(-1). Some of these are arranged in multiplets, which suggests rotational m-mode splitting of non-radial pulsation modes as the cause. If so, the rotation period of the star must be between 30 and 60 d. One of the signals in the light curves of nu Eri has a very low frequency of 0.432 cd(-1). It can be a high-order combination frequency or, more likely, an independent pulsation mode. In the latter case, nu Eri would be both a beta Cephei star and a slowly pulsating B (SPB) star. The photometric amplitudes of the individual pulsation modes of nu Eri appear to have increased by about 20 per cent over the last 40 years. So have the amplitudes of the dominant combination frequencies of the star. Among the latter, we could only identify sum frequencies with certainty, not difference frequencies, which suggests that neither light-curve distortion in its simplest form nor resonant mode coupling is their single cause. One of our comparison stars, mu Eridani, turned out to be variable with a dominant time-scale of 1.62 d. We believe either that it is an SPB star just leaving its instability strip or that its variations are of rotational origin. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Australian Natl Univ, Canberra, ACT, Australia. Wroclaw Univ Observ, PL-51622 Wroclaw, Poland. Natl Opt Astron Observ, Cerro Tololo Inter Amer Observ, La Serena, Chile. Las Campanas Observ, La Serena, Chile. Univ North West, Theoret Astrophys Programme, ZA-2735 Mmabatho, South Africa. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. S African Astron Observ, ZA-7935 Cape Town, South Africa. Konkoly Observ Budapest, H-1525 Budapest 12, Hungary. Univ Hawaii, Dept Phys & Astron, Hilo, HI 96720 USA. Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand. RP Handler, G, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. NR 47 TC 25 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JAN 11 PY 2004 VL 347 IS 2 BP 454 EP 462 PG 9 SC Astronomy & Astrophysics GA 756EB UT ISI:000187451900017 ER PT J AU Garcia-Perez, JL Gonzalez, CI Thomas, MC Olivares, M Lopez, MC TI Characterization of reverse transcriptase activity of the L1Tc retroelement from Trypanosoma cruzi SO CELLULAR AND MOLECULAR LIFE SCIENCES LA English DT Article DE LINE; enzymatic activity; substrates; mutagenesis; template switching; reverse transcriptase ID DNA ELEMENTS; IN-VIVO; RETROTRANSPOSON; RNA; PROTEIN; INTEGRATION; ENDONUCLEASE; ORGANIZATION; SEQUENCE; REGIONS AB The recombinant protein RTL1Tc, encoded by the non-LTR (long terminal repeat) retrotransposon L1Tc from Trypanosoma cruzi, has been shown to have reverse transcriptase (RT) activity using poly(rA)/oligo(dT) and poly(rC)/oligo(dG) homopolymers as template/primers. The optimal RT activity was detected at a concentration of 5 mM Mg2+, pH 8 and between 28 and 37degreesC. Site-directed mutagenesis in the RT catalytic site proved that substitution of aspartic acid 313 for isoleucine (RTD313IL1Tc) practically abolishes the RT activity of the RTL1Tc protein. RT-polymerase chain reaction assays revealed that the RTL1Tc protein has the ability to use both homologous and heterologous RNA templates. Also, it is shown that the RTL1Tc protein is capable of synthesizing complementary DNA molecules by consecutive switching of the oligo molecule, which the protein uses as a template. This template switching may be involved in the retroelement integration process. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Dept Biol Mol, Granada 18001, Spain. Hosp Univ San Cecilio, SAS, Unidad Invest Med, Granada 18012, Spain. Univ Ind Santander, Fac Salud, Escuela Bacteriol, Bucaramanga, Colombia. Puleva Biotech, Dept Inmunol, Granada, Spain. RP Lopez, MC, CSIC, Inst Parasitol & Biomed Lopez Neyra, Dept Biol Mol, Calle Ventanilla 11, Granada 18001, Spain. NR 31 TC 6 PU BIRKHAUSER VERLAG AG PI BASEL PA VIADUKSTRASSE 40-44, PO BOX 133, CH-4010 BASEL, SWITZERLAND SN 1420-682X J9 CELL MOL LIFE SCI JI Cell. Mol. Life Sci. PD DEC PY 2003 VL 60 IS 12 BP 2692 EP 2701 DI 10.1007/s00018-003-3342-y PG 10 SC Biochemistry & Molecular Biology; Cell Biology GA 756VD UT ISI:000187503800011 ER PT J AU Castellsague, X Quintana, MJ Martinez, MC Nieto, A Sanchez, MJ Juan, A Monner, A Carrera, M Agudo, A Quer, M Munoz, N Herrero, R Franceschi, S Bosch, FX TI The role of type of tobacco and type of alcoholic beverage in oral carcinogenesis SO INTERNATIONAL JOURNAL OF CANCER LA English DT Article DE tobacco; alcohol; oral cavity; oropharynx; neoplasia ID UPPER AERODIGESTIVE TRACT; SQUAMOUS-CELL CARCINOMA; UPPER DIGESTIVE-TRACT; ESOPHAGEAL CANCER; RISK-FACTORS; PHARYNGEAL CANCER; HUMAN-PAPILLOMAVIRUS; MATE DRINKING; PUERTO-RICO; NECK-CANCER AB Incidence rates of oral and oropharyngeal cancers (oral cancer) in Spain are among the highest in Europe. Spain has a population heavily exposed to various types of tobacco and alcoholic beverages but the role and impact of tobacco type and beverage type in oral carcinogenesis remain controversial. To estimate the independent and joint effects of tobacco smoking and alcohol drinking habits on the risk of developing oral cancer, we carried out a multicenter, hospital-based, case-control study in Spain. Data from 375 patients newly diagnosed with cancer of the oral cavity or oropharynx and 375 matched control subjects were analyzed using multivariate logistic regression procedures. All exposure characteristics of amount, duration and cessation of both tobacco smoking and alcohol drinking were strongly associated with cancer risk following a dose-dependent relationship. At equal intake or duration levels, black-tobacco smoking and drinking of spirits were both associated with a 2- to 4-fold increase in cancer risk compared to blond tobacco smoking or drinking of wine or beer, respectively. While ever exposure to smoking only or drinking only was associated with a moderate and nonsignificant increase in cancer risk, a history of simultaneous exposure to both habits was associated with a 13-fold increase that was compatible with a synergistic effect model (p-value for interaction: 0.008). Exposure to black tobacco smoking and/or drinking of spirits may account for up to 77% of oral cancer occurrence in Spain. Both black tobacco smoking and drinking of spirits place individuals at a very high risk of developing oral cancer. Simultaneous exposure to tobacco and alcohol consumption increases oral cancer risk in a synergistic fashion, even when consumption levels are moderate. These results underline the importance of type of tobacco and alcohol concentration in oral carcinogenesis. (C) 2003 Wiley-Liss, Inc. C1 Hosp Llobregat, Serv Epidemiol Registre Canc, Inst Catala Oncol, Barcelona, Spain. Registro Canc Granada, Escuela Andaluza Salud Publ, Granada, Spain. Dept Ciencias Sociosanitarias, Fac Med, Seville, Spain. Ciudad Sanitaria & Univ Bellvitge, Hosp Llobregat, Serv Otorinolaringol, Barcelona, Spain. Ciudad Sanitaria & Univ Bellvitge, Hosp Llobregat, Serv Cirurg Maxillofacial, Barcelona, Spain. Ciudad Sanitaria & Univ Bellvitge, Hosp Llobregat, Serv Anat Patol, Barcelona, Spain. Hosp Santa Creu & Sant Pau, Serv Otorrinolaringol, Barcelona, Spain. Int Agcy Res Canc, Unit Field & Intervent Studies, Lyon, France. Costa Rican Fdn Hlth Sci, Proyecto Epidemiol Guanacaste, Santa Ana, Costa Rica. RP Castellsague, X, Hosp Llobregat, Serv Epidemiol Registre Canc, Inst Catala Oncol, Av Gran Via S-N,Km 2,7, Barcelona, Spain. EM xcastellsague@ico.scs.es NR 47 TC 29 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0020-7136 J9 INT J CANCER JI Int. J. Cancer PD FEB 20 PY 2004 VL 108 IS 5 BP 741 EP 749 DI 10.1002/ijc.11627 PG 9 SC Oncology GA 763PB UT ISI:000188093800012 ER PT J AU de Gregorio-Monsalvo, I Gomez, Y Anglada, G Cesaroni, R Miranda, LF Gomez, JF Torrelles, JM TI A survey for water maser emission toward planetary nebulae: New detection in IRAS 17347-3139 SO ASTROPHYSICAL JOURNAL LA English DT Article DE masers; planetary nebulae : general; planetary nebulae : individual (IRAS 17347-3139, K3-35); radio lines : ISM ID LATE-TYPE STARS; CIRCUMSTELLAR ENVELOPES; PROTOPLANETARY NEBULAE; RADIO MORPHOLOGY; IRAS 16342-3814; OH/IR STARS; H2O MASERS; EVOLUTION; SPECTRUM; K-3-35 AB We report on a water maser survey toward a sample of 27 planetary nebulae (PNe) using the Robledo de Chavela and Medicina single-dish antennas, as well as the Very Large Array (VLA). Two detections have been obtained: the already known water maser emission in K3-35, and a new cluster of masers in IRAS 17347-3139. This low rate of detections is compatible with the short lifetime of water molecules in PNe (similar to100 yr). The water maser cluster at IRAS 17347-3139 are distributed on a ellipse of size similar or equal to0."2 x 0."1, spatially associated with compact 1.3 cm continuum emission ( simultaneously observed with the VLA). From archive VLA continuum data at 4.9, 8.4, and 14.9 GHz, a spectral index alpha = 0.76 +/- 0.03 (S-v proportional to v(alpha)) is derived for this radio source, which is consistent with either a partially optically thick ionized region or an ionized wind. However, the latter scenario can be ruled out by mass-loss considerations, thus indicating that this source is probably a young PN. The spatial distribution and the radial velocities of the water masers are suggestive of a rotating and expanding maser ring, tracing the innermost regions of a torus formed at the end of the asymptotic giant branch phase. Given that the 1.3 cm continuum emission peak is located near one of the tips of the major axis of the ellipse of masers, we speculate on a possible binary nature of IRAS 17347-3139, where the radio continuum emission could belong to one of the components and the water masers would be associated with a companion. C1 Inst Nacl Tecn Aeroesp, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Natl Radio Astron Observ, Socorro, NM 87801 USA. Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Osserv Astrofis Arcetri, Ist Nazl Astrofis, I-50125 Florence, Italy. CSIC, IEEC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. RP de Gregorio-Monsalvo, I, Inst Nacl Tecn Aeroesp, Lab Astrofis Espacial & Fis Fundamental, Apartado 50727, E-28080 Madrid, Spain. EM itziar@laeff.esa.es jfg@laeff.esa.es NR 38 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 2004 VL 601 IS 2 PN Part 1 BP 921 EP 929 PG 9 SC Astronomy & Astrophysics GA 769PC UT ISI:000188658100025 ER PT J AU Pena-Diaz, J Montalvetti, A Flores, CL Constan, A Hurtado-Guerrero, R De Souza, W Gancedo, C Ruiz-Perez, LM Gonzalez-Pacanowska, D TI Mitochondrial localization of the mevalonate pathway enzyme 3-hydroxy-3-methyl-glutaryl-CoA reductase in the trypanosomatidae SO MOLECULAR BIOLOGY OF THE CELL DT Article ID HMG-COA REDUCTASE; CHOLESTEROL BIOSYNTHETIC-PATHWAY; COENZYME-A REDUCTASE; SACCHAROMYCES-CEREVISIAE; LEISHMANIA-MAJOR; 3-HYDROXY-3-METHYLGLUTARYL-COA REDUCTASE; CARBON-SOURCES; CRUZI; PROTEINS; BRUCEI AB 3-Hydroxy-3-methyl-glutaryl-CoA reductase (HMGR) is a key enzyme in the sterol biosynthesis pathway, but its subcellular distribution in the Trypanosomatidae family is somewhat controversial. Trypanosoma cruzi and Leishmania HMGRs are closely related in their catalytic domains to bacterial and eukaryotic enzymes described but lack an amino-terminal domain responsible for the attachment to the endoplasmic reticulum. In the present study, digitonin-titration experiments together with immunoelectron microscopy were used to establish the intracellular localization of HMGR in these pathogens. Results obtained with wild-type cells and transfectants overexpressing the enzyme established that HMGR in both T. cruzi and Leishmania major is localized primarily in the mitochondrion and that elimination of the mitochondrial targeting sequence in Leishmania leads to protein accumulation in the cytosolic compartment. Furthermore, T. cruzi HMGR is efficiently targeted to the mitochondrion in yeast cells. Thus, when the gene encoding T. cruzi HMGR was expressed in a hmg1 hmg2 mutant of Saccharomyces cerevisiae, the mevalonate auxotrophy of mutant cells was relieved, and immunoelectron analysis showed that the parasite enzyme exhibits a mitochondrial localization, suggesting a conservation between the targeting signals of both organisms. C1 Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Univ Fed Rio de Janeiro, Inst Biofis Carlos Chagas Filho, BR-21941 Rio De Janeiro, Brazil. Inst Invest Biomed Alberto Sols, Madrid 28029, Spain. RP Gonzalez-Pacanowska, D, Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. EM dgonzalez@ipb.csic.es NR 50 TC 8 PU AMER SOC CELL BIOLOGY PI BETHESDA PA 8120 WOODMONT AVE, STE 750, BETHESDA, MD 20814-2755 USA SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD MAR PY 2004 VL 15 IS 3 BP 1356 EP 1363 DI 10.1091/mbc.E03-10-0720 PG 8 SC Cell Biology GA 800TZ UT ISI:000220051900038 ER PT J AU Reipurth, B Rodriguez, LF Anglada, G Bally, J TI Radio continuum jets from protostellar objects SO ASTRONOMICAL JOURNAL LA English DT Article DE binaries : general; ISM : jets and outflows; radio continuum : ISM; stars : formation; stars : pre-main-sequence ID STAR-FORMING REGIONS; HARO ENERGY-SOURCES; TELESCOPE NICMOS IMAGES; YOUNG STELLAR OBJECTS; NGC 2264 IRS; VLA DETECTION; MOLECULAR OUTFLOWS; EXCITING SOURCES; AMMONIA OBSERVATIONS; SPECTRAL INDEXES AB We have carried out a deep, 3.6 cm radio continuum survey of young outflow sources using the Very Large Array in its A configuration providing subarcsecond resolution. The eight regions observed are Haro 6-10 and L1527 IRS in Taurus, Haro 5a/6a in OMC 2/3, NGC 2023 MMS, NGC 2264 IRS1, HH 108 IRAS/MMS in Serpens, L1228, and L1251A. In combination with our similar and previously published maps of eight other star-forming regions, we find only one region with a single source, while the other 15 regions have on average 3.9 nearby sources. This supports the view that isolated star formation is rare. We have selected 21 objects, which are all young mostly Class I sources, and find a binary frequency of 33% in the separation range from 0."5 to 12". This is within the uncertainties comparable to the observed binary frequency among T Tauri stars in a similar separation range. Seven of the 21 sources drive giant Herbig-Haro flows. Four of these seven are known to have companions ( three are triple systems), corresponding to 57%. We discuss these results in relation to the hypothesis that giant Herbig-Haro flows are driven by disintegrating multiple systems. C1 Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA. RP Reipurth, B, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA. EM reipurth@ifa.hawaii.edu l.rodriguez@astrosmo.unam.mx guillem@iaa.es bally@casa.colorado.edu NR 76 TC 13 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 2004 VL 127 IS 3 BP 1736 EP 1746 PG 11 SC Astronomy & Astrophysics GA 801FL UT ISI:000220081700039 ER PT J AU Marquez, I Durret, F Masegosa, J Moles, M Varela, J Delgado, RMG Maza, J Perez, E Roth, M TI Long slit spectroscopy of a sample of isolated spirals with and without an AGN SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : spiral; galaxies : kinematics and dynamics; galaxies : structure; galaxies : interactions ID NEAR-INFRARED PHOTOMETRY; ACTIVE GALACTIC NUCLEI; ROTATION CURVES; HOST GALAXIES; INACTIVE GALAXIES; SEYFERT-GALAXIES; BARS; MORPHOLOGY; KINEMATICS; REGIONS AB We present the kinematical data obtained for a sample of active (Seyfert) and non active isolated spiral galaxies, based on long slit spectra along several position angles in the Ha line region and, in some cases, in the Ca triplet region as well. Gas velocity distributions are presented, together with a simple circular rotation model that allows us to determine the kinematical major axes. Stellar velocity distributions are also shown. The main result is that active and control galaxies seem to be equivalent in all kinematical aspects. For both subsamples, the departure from pure circular rotation in some galaxies can be explained by the presence of a bar and/or of a spiral arm. They also present the same kind of peculiarities, in particular, S-shape structures are quite common near the nuclear regions. They define very similar Tully-Fisher relations. Emission line ratios are Given for all the detected HII regions; the analysis of the [NIl]/Halpha metallicity indicator shows that active and non-active galaxies have indistinguishable disk metallicities. These results argue in favour of active and non-active isolated spiral galaxies having essentially the same properties, in agreement with our previous results based on the analysis of near infrared images. It appears now necessary to confirm these results on a larger sample. C1 Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain. Inst Astrophys, CNRS, F-75014 Paris, France. Univ Chile, Dept Astron, Santiago, Chile. Observ Carnegie Inst Washington, Pasadena, CA 91101 USA. RP Marquez, I, Inst Astrofis Andalucia, CSIC, Apartado 3004, E-18080 Granada, Spain. EM isabel@iaa.es NR 23 TC 4 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2004 VL 416 IS 2 BP 475 EP 498 DI 10.1051/0004-6361:20034108 PG 24 SC Astronomy & Astrophysics GA 811PG UT ISI:000220783200009 ER PT J AU Fernandes, RC Delgado, RMG Schmitt, H Storchi-Bergmann, T Martins, LP Perez, E Heckman, T Leitherer, C Schaerer, D TI The stellar populations of low-luminosity active galactic nuclei. I. Ground-based observations SO ASTROPHYSICAL JOURNAL DT Article DE galaxies : active; galaxies : nuclei; galaxies : starburst; galaxies : stellar content ID DWARF SEYFERT NUCLEI; WOLF-RAYET GALAXIES; NEARBY GALAXIES; STAR-FORMATION; STARBURST GALAXIES; ELLIPTIC GALAXIES; EMISSION-LINES; COOLING FLOWS; HOST GALAXIES; RADIO-SOURCES AB We present a spectroscopic study of the stellar populations of low-luminosity active galactic nuclei (LLAGNs). Our main goal is to determine whether the stars that live in the innermost ( 100 pc scale) regions of these galaxies are in some way related to the emission-line properties, which would imply a link between the stellar population and the ionization mechanism. High signal-to-noise ratio, ground-based long-slit spectra in the 3500-5500 Angstrom interval were collected for 60 galaxies: 51 LINERs and LINER/H II transition objects, two starburst galaxies, and seven nonactive galaxies. In this paper, the first of a series, we ( 1) describe the sample; ( 2) present the nuclear spectra; ( 3) characterize the stellar populations of LLAGNs by means of an empirical comparison with normal galaxies; ( 4) measure a set of spectral indices, including several absorption-line equivalent widths and colors indicative of stellar populations; and ( 5) correlate the stellar indices with emission-line ratios that may distinguish between possible excitation sources for the gas. Our main findings are as follows: ( 1) Few LLAGNs have a detectable young (less than or similar to10(7) yr) starburst component, indicating that very massive stars do not contribute significantly to the optical continuum. In particular, no features due to Wolf-Rayet stars were convincingly detected. (2) High-order Balmer absorption lines of H I (HOBLs), on the other hand, are detected in similar to40% of LLAGNs. These features, which are strongest in 10(8) - 10(9) yr intermediate-age stellar populations, are accompanied by diluted metal absorption lines and bluer colors than other objects in the sample. ( 3) These intermediate-age populations are very common (similar to50%) in LLAGNs with relatively weak [O I] emission ([O I]/Halpha less than or equal to 0.25) but rare (similar to10%) in LLAGNs with stronger [O I]. This is intriguing since LLAGNs with weak [O I] have been previously hypothesized to be "transition objects'' in which both an AGN and young stars contribute to the emission-line excitation. Massive stars, if present, are completely outshone by intermediate-age and old stars in the optical. This happens in at least a couple of objects where independent UV spectroscopy detects young starbursts not seen in the optical. (4) Objects with predominantly old stars span the whole range of [O I]/Halpha values, but (5) sources with significant young and/or intermediate-age populations are nearly all (similar to90%) weak [ O I] emitters. These new findings suggest a link between the stellar populations and the gas ionization mechanism. The strong -[ O I] objects are most likely true LLAGNs, with stellar processes being insignificant. However, the weak -[ O I] objects may comprise two populations, one where the ionization is dominated by stellar processes and another where it is governed by either an AGN or a more even mixture of stellar and AGN processes. Possible stellar sources for the ionization include weak starbursts, supernova remnants, and evolved poststarburst populations. These scenarios are examined and constrained by means of complementary observations and detailed modeling of the stellar populations in forthcoming communications. C1 Univ Fed Santa Catarina, Dept Fis CFM, BR-88040900 Florianopolis, SC, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Radio Astron Observ, Charlottesville, VA 22903 USA. Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo, Brazil. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Observ Geneva, CH-1290 Sauverny, Switzerland. Astrophys Lab, UMR 5572, F-31400 Toulouse, France. RP Fernandes, RC, Univ Fed Santa Catarina, Dept Fis CFM, CP 476, BR-88040900 Florianopolis, SC, Brazil. EM cid@astro.ufsc.br rosa@iaa.es hschmitt@nrao.edu thaisa@if.ufrgs.br martins@stsci.edu eperez@iaa.es heckman@pha.jhu.edu leitherer@stsci.edu NR 67 TC 24 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 10 PY 2004 VL 605 IS 1 PN Part 1 BP 105 EP 126 PG 22 SC Astronomy & Astrophysics GA 811WJ UT ISI:000220801700011 ER PT J AU Delgado, RMG Fernandes, RC Perez, E Martins, LP Storchi-Bergmann, T Schmitt, H Heckman, T Leitherer, C TI The stellar populations of low-luminosity active galactic nuclei. II. Space telescope imaging spectrograph observations SO ASTROPHYSICAL JOURNAL DT Article DE galaxies : active; galaxies : nuclei; galaxies : starburst; galaxies : stellar content ID DWARF SEYFERT NUCLEI; STAR-FORMATION; NEARBY GALAXIES; IONIZING SOURCE; ACCRETION DISK; LINERS; EMISSION; STARBURST; EVOLUTION; CLUSTER AB We present a study of the stellar populations of low-luminosity active galactic nuclei (LLAGNs). Our goal is to search for spectroscopic signatures of young and intermediate-age stars and to investigate their relationship with the ionization mechanism in LLAGNs. The method used is based on the stellar population synthesis of the optical continuum of the innermost ( 20 - 100 pc) regions in these galaxies. For this purpose, we have collected high spatial resolution optical (2900 - 5700 Angstrom) STIS spectra of 28 nearby LLAGNs that are available in the Hubble Space Telescope archive. The analysis of these data is compared with a similar analysis also presented here for 51 ground-based spectra of LLAGNs. Our main findings are as follows: ( 1) No features due to Wolf-Rayet stars were convincingly detected in the STIS spectra. ( 2) Young stars contribute very little to the optical continuum in the ground-based aperture. However, the fraction of light provided by these stars is higher than 10% in most of the weak-[O I] ([O I]/Halpha less than or equal to 0.25) LLAGN STIS spectra. (3) Intermediate-age stars contribute significantly to the optical continuum of these nuclei. This population is more frequent in objects with weak than with strong [O I]. Weak -[O I] LLAGNs that have young stars stand out for their intermediate-age population. (4) Most of the strong -[O I] LLAGNs have predominantly old stellar population. A few of these objects also show a featureless continuum that contributes significantly to the optical continuum. These results suggest that young and intermediate-age stars do not play a significant role in the ionization of LLAGNs with strong [ O I]. However, the ionization in weak -[O I] LLAGNs with young and/or intermediate-age populations could be due to stellar processes. A comparison of the properties of these objects with Seyfert 2 galaxies that harbor a nuclear starburst suggests that weak -[O I] LLAGNs are the lower luminosity counterparts of the Seyfert 2 composite nuclei. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Fed Santa Catarina, Dept Fis CFM, BR-88040900 Florianopolis, SC, Brazil. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Inst Astron Geofis & Ciencia Atmosfer, BR-05508900 Sao Paulo, Brazil. Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. Natl Radio Astron Observ, Charlottesville, VA 22903 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. RP Delgado, RMG, CSIC, Inst Astrofis Andalucia, POB 3004, E-18080 Granada, Spain. EM rosa@iaa.es cid@astro.ufsc.br eperez@iaa.es martins@stsci.edu thaisa@if.ufrgs.br hschmitt@nrao.edu heckman@pha.jhu.edu leitherer@stsci.edu NR 44 TC 22 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 10 PY 2004 VL 605 IS 1 PN Part 1 BP 127 EP 143 PG 17 SC Astronomy & Astrophysics GA 811WJ UT ISI:000220801700012 ER PT J AU Anglada, G Rodriguez, LF Osorio, M Torrelles, JM Estalella, R Beltran, MT Ho, PTP TI A single circumstellar disk in the SVS 13 close binary system SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (HH 7-11, NGC 1333; SVS 13); ISM : jets and outflows; radio continuum : ISM; stars : formation ID HERBIG-HARO OBJECTS; HH 7-11 REGION; EXCITING SOURCE; PROPER MOTIONS; STAR; VARIABILITY; CONTINUUM; NGC-1333; SSV-13; L1551-IRS-5 AB We present Very Large Array observations at 7 mm of the sources IRAS 2A, IRAS 2B, MMS 2, MMS 3, and SVS 13, in the NGC 1333 region. SVS 13 is a young close binary system whose components are separated by 65 AU in projection. Our high angular resolution observations reveal that only one of the components of the SVS 13 system (VLA 4B) is associated with detectable circumstellar dust emission. This result is in contrast with the well-known case of L1551 IRS 5, a binary system of two protostars separated by 45 AU, where each component is associated with a disk of dust. In both SVS 13 and in L1551 IRS 5 the emission apparently arises from compact accretion disks, smaller than those observed around single stars, but still massive enough to form planetary systems like the solar one. These observational results confirm that the formation of planets can occur in close binary systems, either in one or in both components of the system, depending on the specific angular momentum of the infalling material. C1 CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. UNAM, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, Mexico. CSIC, IEEC, Inst Ciencias Espacio, ES-08034 Barcelona, Spain. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Osserv Astrofis Arcetri, I-50125 Florence, Italy. Acad Sinica, Inst Astron & Astrophys, Taipei 115, Taiwan. RP Anglada, G, CSIC, Inst Astrofis Andalucia, Camino Bajo de Huetor 24, E-18008 Granada, Spain. EM guillem@iaa.es l.rodriguez@astrosmo.unam.mx osorio@iaa.es torrelles@ieec.fcr.es robert@am.ub.es mbeltran@arcetri.astro.it ho@cfa.harvard.edu NR 31 TC 7 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 20 PY 2004 VL 605 IS 2 PN Part 2 BP L137 EP L140 PG 4 SC Astronomy & Astrophysics GA 811WM UT ISI:000220802000013 ER PT J AU Mathias, P Le Contell, JM Chapellier, E Jankov, S Sareyan, JP Poretti, E Garrido, R Rodriguez, E Ferro, AA Alvarez, M Parrao, L Pena, J Eyer, L Aerts, C De Cat, P Weiss, WW Zhou, A TI Multi-site, multi-technique survey of gamma Doradus candidates - I. Spectroscopic results for 59 stars SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE line : profiles; stars : variables : general; stars : oscillations; stars : binaries : spectroscopic ID HIPPARCOS EPOCH PHOTOMETRY; DELTA-SCUTI STARS; A-TYPE STARS; SHELL STARS; SPECKLE INTERFEROMETRY; ROTATIONAL VELOCITIES; HR 8799; VARIABLES; CAMPAIGN; DISCOVERY AB We present the first results of a 2-year high-resolution spectroscopy campaign of 59 candidate gamma Doradus stars which were mainly discovered from the HIPPARCOS astrometric mission. More than 60% of the stars present line profile variations which can be interpreted as due to pulsation related to gamma Doradus stars. For all stars we also derived the projected rotation velocity (up to more than 200 km s(-1)). The amplitude ratios 2K/Deltam for the main HIPPARCOS frequency are in the range 35-96 km s(-1) mag(-1). About 50% of the candidates are possible members of binary systems, with 20 stars being confirmed gamma Doradus. At least 6 stars present composite spectra, and in all but one case (for which only one spectrum could be obtained), the narrow component shows line profile variations, pointing towards an uncomfortable situation if this narrow component originates from a shell surrounding the star. This paper is the first of a series concerning mode identification using both photometric and spectroscopic methods for the confirmed gamma Doradus stars of the present sample. C1 Observ Cote Azur, Dept Fresnel, UMR 6528, F-06304 Nice 4, France. Osserv Astron Brera, I-23807 Merate, Italy. Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. UNAM, IA, Observ Astron Nacl, Ensenada 22800, Baja California, Mexico. Princeton Univ Observ, Princeton, NJ 08544 USA. Katholieke Univ Leuven, Dept Natuurkunde & Sterrenkunde, B-3001 Louvain, Belgium. Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. RP Mathias, P, Observ Cote Azur, Dept Fresnel, UMR 6528, F-06304 Nice 4, France. EM mathias@obs-nice.fr NR 49 TC 21 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2004 VL 417 IS 1 BP 189 EP 199 DI 10.1051/0004-6361:20034503 PG 11 SC Astronomy & Astrophysics GA 814LL UT ISI:000220976100024 ER PT J AU Mugrauer, M Neuhauser, R Guenther, EW Hatzes, AP Huelamo, N Fernandez, M Ammler, M Retzlaff, J Konig, B Charbonneau, D Jayawardhana, R Brandner, W TI HD 77407 and GJ 577: Two new young stellar binaries - Detected with the Calar Alto Adaptive Optics system ALFA SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : low mass, brown dwarfs; stars : binaries : general ID PRE-MAIN-SEQUENCE; CANDIDATE SUBSTELLAR COMPANION; STAR SPECTROSCOPIC SURVEY; BROWN DWARF COMPANION; RADIAL-VELOCITIES; EVOLUTIONARY MODELS; MAGNETIC ACTIVITY; PROPER MOTION; GLIESE 569B; MASS STARS AB We present the first results from our search for close stellar and sub-stellar companions to young nearby stars on the northern sky. Our infrared imaging observations are obtained with the 3.5 m Calar Alto telescope and the AO system ALFA. With two epoch observations which were separated by about one year, we found two co-moving companion candidates, one close to HD 77407 and one close to GJ 577. For the companion candidate near GJ 577, we obtained an optical spectrum showing spectral type M 4.5; this candidate is a bound low-mass stellar companion confirmed by both proper motion and spectroscopy. We estimate the masses for HD 77407 B and GJ 577 B to be similar to0.3 to 0.5 M-. and similar to0.16 to 0.2 M-., respectively. Compared to Siess et al. (2000) models, each of the two pairs appears co-eval with HD 77407 A, B being 10 to 40 Myrs and GJ 577 A, B being greater than or equal to 100 Myrs old. We also took multi-epoch high-resolution spectra of HD 77407 to search for sub-stellar companions, but did not find any with 3 M-Jup as upper mass (m sin i) limit (for up to 4 year orbit s); however, we detected a long-term radial velocity trend in HD 77407 A, consistent with a similar to0.3 M-. companion at similar to50 AU separation, i.e. the one detected by the imaging. Hence, HD 77407 B is confirmed to be a bound companion to HD 77407 A. We also present limits for undetected, but detectable companions using a deep image of HD 77407 A and B, also observed with the Keck NIRC2 AO system; any brown dwarfs were detectable outside of 0.5 arcsec (17 AU at HD 77407), giant planets with masses from similar to6.5 to 12 M-Jup were detectable at greater than or equal to 1.5 arcsec. C1 Univ Jena, Inst Astrophys, D-07745 Jena, Germany. Max Planck Inst Extraterr Phys, D-85748 Garching, Germany. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. European So Observ, Santiago 19, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CALTECH, Pasadena, CA 91125 USA. Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA. Max Planck Inst Astron, D-69117 Heidelberg, Germany. RP Mugrauer, M, Univ Jena, Inst Astrophys, Schillergasschen 2-3, D-07745 Jena, Germany. EM markus@astro.uni-jena.de NR 39 TC 7 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2004 VL 417 IS 3 BP 1031 EP 1038 DI 10.1051/0004-6361:20040008 PG 8 SC Astronomy & Astrophysics GA 819FG UT ISI:000221299400025 ER PT J AU Martinez, A Obertello, M Pardo, A Ocampo, JA Godeas, A TI Interactions between Trichoderma pseudokoningii strains and the arbuscular mycorrhizal fungi Glomus mosseae and Gigaspora rosea SO MYCORRHIZA LA English DT Article DE Arbuscular mycorrhiza; Glomus mosseae; Gigaspora rosea; glycine max; saprotrophic fungi ID ALTERNARIA-ALTERNATA; FUSARIUM-EQUISETI; SOYBEAN PLANTS; SOIL; HARZIANUM; GROWTH; INTRARADICES; BIOCONTROL; INFECTION; SPORE AB The interaction between Trichoderma pseudokoningii (Rifai) 511, 2212, 741A, 741B and 453 and the arbuscular mycorrhizal fungi Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe BEG12 and Gigaspora rosea Nicolson & Schenck BEG9 were studied in vitro and in greenhouse experiments. All T. pseudokoningii strains inhibited the germination of G. mosseae and Gi. rosea except the strain 453, which did not affect the germination of Gi. rosea. Soluble exudates and volatile substances produced by all T. pseudokoningii strains inhibited the spore germination of G. mosseae. The germination of Gi. rosea spores was inhibited by the soluble exudates produced by T. pseudokoningii 2212 and 511, whereas T. pseudokoningii 714A and 714B inhibited the germination of Gi. rosea spores by the production of volatile substances. The strains of T. pseudokoningii did not affect dry matter and percentage of root length colonization of soybean inoculated with G. mosseae, except T. pseudokoningii 2212, which inhibited both parameters. However, all T. pseudokoningii strains decreased the shoot dry matter and the percentage of AM root length colonization of soybean inoculated with Gi. rosea. The saprotrophic fungi tested seem to affect AM colonization of root by effects on the presymbiotic phase of the AM fungi. No influence of AM fungi on the number of CFUs of T pseudokoningii was found. The effect of saprotrophic fungi on AM fungal development and function varied with the strain of the saprotrophic species tested. C1 CSIC, Dept Microbiol, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. Univ Nacl Quilmes, Ctr Estudios & Invest, Prorgama Invest Interacc Biol, Bernal, Buenos Aires, Argentina. Univ Nacl Quilmes, Dept Ciencia & Tecnol, Bernal, Buenos Aires, Argentina. RP Ocampo, JA, CSIC, Dept Microbiol, Estac Expt Zaidin, Prof Albareda 1, E-18008 Granada, Spain. EM juanantonio.ocampo@eez.csic.es NR 27 TC 3 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0940-6360 J9 MYCORRHIZA JI Mycorrhiza PD APR PY 2004 VL 14 IS 2 BP 79 EP 84 DI 10.1007/s00572-003-0240-y PG 6 SC Mycology GA 819GH UT ISI:000221302400002 ER PT J AU Braine, J Lisenfeld, U Duc, PA Brinks, E Charmandaris, V Leon, S TI Colliding molecular clouds in head-on galaxy collisions SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : spiral; galaxies : evolution; galaxies : ISM; galaxies : interaction; galaxies : individual : UGC 813; galaxies : individual : UGC 816 ID INTERACTING GALAXIES; TAFFY GALAXIES; STAR FORMATION; GAS; PAIR AB We present further observations of molecular gas in head-on collisions of spiral galaxies, this time of the CO(J = 1 --> 0) and CO(J = 2 --> 1) lines in the UGC 813 - UGC 816 system. UGC 813/6 are only the second known example of head-on spiral-spiral collisions, the first example being the UGC 12914/5 pair. Strong CO emission is present in the bridge between UGC 813 and 816, unassociated with stellar emission, just as in UGC 12914/5. The CO emission from the UGC 813/6 bridge, not counting the emission from the galaxies themselves, is at least that of the entire Milky Way. Collisions of gas-rich spirals are really collisions between the interstellar media (ISMs) of the galaxies. We show that collisions between molecular clouds bring H-2 into the bridge region. Although the dense clouds are ionized by the collisions, they cool and recombine very quickly and become molecular again even before the galactic disks separate. Because the clouds acquire an intermediate velocity post-collision, they are left in the bridge between the separating galaxies. The star formation efficiency appears low in the molecular clouds in the bridges. We speculate that the pre-stellar cores in the molecular clouds may expand during the cloud collisions, thus retarding future star formation. Because the ISM-ISM collisions discussed here require a very small impact parameter, they are rare among field spirals. In clusters, however, these collisions should be an important means of ejecting enriched gas from the inner parts of spirals. C1 Observ Bordeaux, CNRS, INSU, UMR 5804, F-33270 Floirac, France. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CNRS, URA 2052, F-91191 Gif Sur Yvette, France. CEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France. INAOE, Puebla 72000, Mexico. Cornell Univ, Dept Astron, Ithaca, NY 14853 USA. Observ Paris, LERMA, F-75014 Paris, France. RP Braine, J, Observ Bordeaux, CNRS, INSU, UMR 5804, BP 89, F-33270 Floirac, France. EM braine@obs.u-bordeaux1.fr NR 24 TC 6 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2004 VL 418 IS 2 BP 419 EP 428 DI 10.1051/0004-6361:20035732 PG 10 SC Astronomy & Astrophysics GA 824ER UT ISI:000221669200005 ER PT J AU Fracchia, S Sampedro, I Scervino, JM Garcia-Romera, I Ocampo, JA Godeas, A TI Influence of saprobe fungi and their exudates on arbuscular mycorrhizal symbioses SO SYMBIOSIS LA English DT Article DE arbuscular mycorrhizal fungi; Gigaspora rosea; Glomus mosseae; plant growth; saprobe fungi ID GLOMUS-MOSSEAE; TRICHODERMA-HARZIANUM; BIOLOGICAL-CONTROL; SOIL; GROWTH; INTRARADICES; PLANTS; ROOTS; COLONIZATION; INOCULATION AB The effects of saprobe fungi Aspergillus niger (341), Penicillium restrictum (512) and Trichoderma harzianum (153) isolated from soil, or their exudates on the arbuscular mycorrhizal (AM) fungi Glomus mosseae and Gigaspora rosea were studied in greenhouse and in vitro experiments. A. niger and its exudates stimulated the germination and hyphal outgrowth of G. mosseae and Gi. rosea spores and AM colonization of roots by these and native fungi in an unsterilized soil. In contrast, T. harzianum and its exudates had no effects, and P. restrictum and its exudates had no effects on spore germination or hyphal outgrowth from spores of either G. mosseae or colonization by the native AM endophytes in an unsterilized soil. Effect of A. niger were dependent on the concentration of exudates and varied according to the AM endophyte. For example, the application of 1-2.5 mul/ml of exudates of A. niger increased the outgrowth of hyphae from spores of G. mosseae, but for Gi. rosea increases only occurred in the range 1-10 mul/ml. On the other hand, the colonization of plants by Gi. rosea increased with the application of 10 ml/pot of exudates of A. niger, but the colonization of soybean by G. mosseae or by native AM endophytes increased in the presence of 20 mul/pot of exudates. The similarity in trends observed in the effects of the saprobe fungi or their exudates on spore germination and hyphal length and effects on AM colonization of plants and number of propagules of AM fungi suggest that the effects of saprobe fungi are largely due to effects on the extraradical phase of the AM fungi. C1 Univ Buenos Aires, Dept Biodiversidad & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. CSIC, Estac Expt Zaidin, Dept Microbiol, E-18008 Granada, Spain. RP Ocampo, JA, Univ Buenos Aires, Dept Biodiversidad & Biol Expt, 4 Piso,2 Pabellon,Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina. NR 41 TC 4 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT 76120, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 2004 VL 36 IS 2 BP 169 EP 182 PG 14 SC Microbiology GA 827ED UT ISI:000221880900004 ER PT J AU Thomsen, B Hjorth, J Watson, D Gorosabel, J Fynbo, JPU Jensen, BL Andersen, MI Dall, TH Rasmussen, JR Bruntt, H Laurikainen, E Augusteijn, T Pursimo, T Germany, L Jakobsson, P Pedersen, K TI The supernova 2003lw associated with X-ray flash 031203 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; supernovae : general ID 25 APRIL 1998; ABSOLUTE-MAGNITUDE DISTRIBUTIONS; OPTICAL AFTERGLOW; BURSTS; DISCOVERY; EMISSION; GRB-011121; COLLAPSARS; GRB-030329; GRB-031203 AB The X-Ray Flash (XRF), 031203 with a host galaxy at z = 0.1055, is, apart from GRB 980425, the closest gamma-Ray Burst (GRB) or XRF known to date. We have monitored its host galaxy from 1-100 days after the burst. In spite of the high extinction to the source and the bright host, a significant increase and subsequent decrease has been detected in the apparent brightness of the host, peaking between 10 and 33 days after the GRB. The only convincing explanation is a supernova (SN) associated with the XRF, SN20031w. This is the earliest time at which a SN signal is clearly discernible in a GRB/XRF (apart from SN1998bw). SN20031w is extremely luminous with a broad peak and can be approximately represented by the lightcurve of SN1998bw brightened by similar to0.55 mag, implying a hypernova, as observed in most GRB-SNe. The XRF-SN association firmly links XRFs with the deaths of massive stars and further strengthens their connection with GRBs. The fact that SNe are also associated with XRFs implies that Swift may detect a significant population of intermediate redshift SNe very soon after the SN explosions, a sample ideally suited for detailed studies of early SN physics. C1 Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. European So Observ, Santiago 19, Chile. Univ Oulu, Dept Phys Sci, Oulu 90014, Finland. Nord Opt Telescope, Santa Cruz de La Palma 38700, Canary Islands, Spain. RP Thomsen, B, Aarhus Univ, Dept Phys & Astron, Ny Munkegade, DK-8000 Aarhus C, Denmark. EM bt@phys.au.dk NR 43 TC 35 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2004 VL 419 IS 2 BP L21 EP L25 DI 10.1051/0004-6361:20040133 PG 5 SC Astronomy & Astrophysics GA 827GD UT ISI:000221886800005 ER PT J AU Breger, M Rodler, F Pretorius, ML Martin-Ruiz, S Amado, PJ Costa, V Garrido, R de Coca, PL Olivares, I Rodriguez, E Rolland, A Tshenye, T Handler, G Poretti, E Sareyan, JP Alvarez, M Kilmartin, PM Zima, W TI The delta Scuti star FG Vir. - V. The 2002 photometric multisite campaign SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : variables : delta Sct; stars : oscillations; stars : individual : FG Vir; techniques : photometric ID 4 CANUM-VENATICORUM; PULSATION FREQUENCIES; MODE-IDENTIFICATIONS; VIRGINIS AB A high-accuracy multisite campaign was caffied out from 2002 January to May with a photometric coverage of 398 h at five observatories. The concentration on a few selected sites gives better consistency and accuracy than collecting smaller amounts from a larger number of sites. 23 frequencies were detected with a high statistical significance. 6 of these are new. The 17 frequencies found in common with the 1992-1995 data are the modes with highest amplitudes. This indicates that the pulsation spectrum of FG Vir is relatively stable over the ten-year period. Two frequencies have variable amplitudes and phases from year to year as well as during 2002. These were both found to be double modes with close frequencies. For the mode at 12.15 c/d this leads to an apparent modulation with a time scale of similar to129 d. The close frequencies at 12.15 c/d are composed of a radial and a nonradial mode, suggesting a similarity with the Blazhko Effect seen in RR Lyrae stars. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South Africa. Osserv Astron Brera, INAF, I-23807 Merate, Italy. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ NW, Mmabatho, South Africa. S African Astron Observ, ZA-7935 Cape Town, South Africa. Observ Cote Azur, F-0634 Nice 4, France. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Canterbury, Dept Phys & Astron, Mt John Univ Observ, Christchurch 1, New Zealand. RP Breger, M, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM breger@astro.univie.ac.at NR 17 TC 8 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2004 VL 419 IS 2 BP 695 EP 701 DI 10.1051/0004-6361:20035830 PG 7 SC Astronomy & Astrophysics GA 827GD UT ISI:000221886800031 ER PT J AU Vreeswijk, PM Ellison, SL Ledoux, C Wijers, RAMJ Fynbo, JPU Moller, P Henden, A Hjorth, J Masi, G Rol, E Jensen, BL Tanvir, N Levan, A Ceron, JMC Gorosabel, J Castro-Tirado, AJ Fruchter, AS Kouveliotou, C Burud, I Rhoads, J Masetti, N Palazzi, E Pian, E Pedersen, H Kaper, L Gilmore, A Kilmartin, P Buckle, JV Seigar, MS Hartmann, DH Lindsay, K van den Heuvel, EPJ TI The host of GRB 030323 at z=3.372: A very high column density DLA system with a low metallicity SO ASTRONOMY & ASTROPHYSICS LA English DT Review DE gamma rays : bursts; galaxies : distances and redshifts; galaxies : quasars : absorption lines; ISM : dust, extinction ID GAMMA-RAY BURST; LYMAN-ALPHA SYSTEMS; INTERSTELLAR MOLECULAR-HYDROGEN; INFRARED EXTINCTION LAW; HIGH-REDSHIFT GALAXIES; 14 DECEMBER 1997; 29 MARCH 2003; STAR-FORMATION; ABSORPTION SYSTEMS; OPTICAL AFTERGLOW AB We present photometry and spectroscopy of the afterglow of GRB 030323. VET spectra of the afterglow show damped Lyalpha (DLA) absorption and low- and high-ionization lines at a redshift z = 3.3718 +/- 0.0005. The inferred neutral hydrogen column density, log N(H I) = 21.90 +/- 0.07, is larger than any (GRB- or QSO-) DLA H I column density inferred directly from Lyalpha in absorption, From the afterglow photometry, we derive a conservative upper limit to the host-galaxy extinction: A(V) < 0.5 mag. The iron abundance is [Fe/H] = -1.47 &PLUSMN; 0.11, while the rnetallicity of the gas as measured from sulphur is [S/H] = -1.26 &PLUSMN; 0.20. We derive an upper limit on the H-2 molecular fraction of 2N(H-2)/(2N(H-2) + N(H I)) &LSIM; 10(-6). In the Lyα trough, a Lyα emission line is detected, which corresponds to a star-formation rate (not corrected for dust extinction) of roughly I M. yr(-1). All these results are consistent with the host galaxy of GRB 030323 consisting of a low metallicity gas with a low dust content. We detect fine-structure lines of silicon, Si II*, which have never been clearly detected in QSO-DLAs; this Suggests that these lines are produced in the vicinity of the GRB explosion site. Under the assumption that these fine-structure levels are Populated by particle collisions, we estimate the H I volume density to be n(H I) = 10(2)-10(4) cm(-3). HST/ACS imaging 4 months after the burst shows an extended AB(F606W) = 28.0 &PLUSMN; 0.3 mag object at a distance of 0.&DPRIME;14 (1 kpc) from the early afterglow location, which presumably is the host galaxy of GRB 030323. C1 European So Observ, Santiago 19, Chile. Pontificia Univ Catolica Chile, Santiago 22, Chile. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark. European So Observ, D-85748 Garching, Germany. USN Observ, Univ Space Res Assoc, Flagstaff Stn, Flagstaff, AZ 86002 USA. Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. NSSTC, Huntsville, AL 35805 USA. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand. Joint Astron Ctr, Hilo, HI 96720 USA. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. RP Vreeswijk, PM, European So Observ, Alonso Cordova 3107,Casilla 19001, Santiago 19, Chile. EM pvreeswi@eso.org NR 103 TC 76 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2004 VL 419 IS 3 BP 927 EP 940 DI 10.1051/0004-6361:20040086 PG 14 SC Astronomy & Astrophysics GA 827PO UT ISI:000221913100020 ER PT J AU Cadenas, JM Pelta, DA Pelta, HR Verdegay, JL TI Application of fuzzy optimization to diet problems in Argentinean farms SO EUROPEAN JOURNAL OF OPERATIONAL RESEARCH LA English DT Article DE decision support systems; fuzzy linear programming; diet problem AB The problem of designing diets for cattle in an Argentinean farm is addressed in this paper. Usually the livestock is not confined, so it is impossible to assess the amount of food each animal will eat. Therefore it makes no sense to design diets verifying the nutritional requirements exactly. It is more valuable to allow for constraint violations, i.e., fuzzy constraints which in turn may lead to cheaper diets. Under this scenario the problem is modelled as a fuzzy linear programming (FLP) one and then solved by using a decision support systems (DSS) named SACRA (a Spanish acronym for support system for the construction of cattle diets) that the authors have specifically developed for this problem. SACRA is based on PROBO, an already experimented DSS also developed by the authors, and it is highly friendship, interactive and does not require any knowledge about FLP. The tests carried out with SACRA have shown a high level of satisfaction from the side of the decision makers. (C) 2003 Elsevier B.V. All rights reserved. C1 ETS Ingn Informat, Dept Ciencias Computac & IA, Granada 18071, Spain. Fac Informat, Dept Ing Informat & Comunicac, Murcia 30071, Spain. OIT, INTA, RA-8160 Tornquist, BA, Argentina. RP Verdegay, JL, ETS Ingn Informat, Dept Ciencias Computac & IA, Granada 18071, Spain. EM jcadenas@dif.um.es dpelta@ugr.es hrpelta@hotmail.com verdegay@ugr.es NR 7 TC 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-2217 J9 EUR J OPER RES JI Eur. J. Oper. Res. PD OCT 1 PY 2004 VL 158 IS 1 BP 218 EP 228 DI 10.1016/S0377-2217(03)00365-4 PG 11 SC Management; Operations Research & Management Science GA 828RS UT ISI:000221991100014 ER PT J AU Boehnhardt, H Barucci, A Delsanti, A De Bergh, C Doressoundiram, A Romon, J Dotto, E Tozzi, G Lazzarin, M Fornasier, S Peixinho, N Hainaut, O Davies, J Rousselot, P Barrera, L Birkle, K Meech, K Ortiz, J Sekiguchi, T Watanabe, J Thomas, N West, R TI Results from the ESO large program on Transneptunian Objects and Centaurs SO EARTH MOON AND PLANETS LA English DT Article ID TRANS-NEPTUNIAN OBJECTS; KUIPER-BELT OBJECTS; NEAR-INFRARED SPECTROSCOPY; TNOS; PHOTOMETRY AB BVRI photometry of 107 TNOs and Centaurs establishes the range of spectral gradients to be between - 5 to 55%/100 nm ( with one exception). A cluster of very red Cubewanos is firmly identified in orbits of low inclination and eccentricity beyond 40 AU from the Sun. Further correlations between surface colours and dynamical parameters ( inclination and perihelion distance) are suggested for Cubewanos and scattered disk objects, but lack complete confidence for their reality. Plutinos and Centaurs do not show any clear correlation between surface colours and orbital parameters. We present in this paper 12 spectra obtained in the visible region and nine of them for which we obtained also near infrared spectra up to 2.4 microns. A few other objects have been observed, but the data are still under reduction and analysis. The principal reported results obtained are: (i) a wide range of visible slopes; (ii) evidence for surface variations on 2001 PT13; and (iii) possible detection of few percent of water ice ( 1999 TC36, 2000 EB173, 1999 DE9\, 2001 PT13, 2000 QC(243), 1998 SG(35)). C1 Observ Paris, Meudon, France. Osserv Astron Roma, I-00136 Rome, Italy. Osservatorio Astron Arcetri, Florence, Italy. Osserv Astron Padova, I-35122 Padua, Italy. Observ Astron Lisboa, Lisbon, Portugal. European So Observ, Santiago 19, Chile. Royal Observ Edinburgh, Edinburgh, Midlothian, Scotland. Observ Besancon, Besancon, France. Univ Catolica Norte, Antofagasta, Chile. Univ Hawaii, Honolulu, HI 96822 USA. Inst Astron Andalucia, Granada, Spain. Natl Astron Observ, Mitaka, Tokyo 181, Japan. Univ Bern, CH-3012 Bern, Switzerland. European So Observ, D-8046 Garching, Germany. RP Boehnhardt, H, Max Planck Inst Astron, Konigstuhl 17, D-6900 Heidelberg, Germany. NR 18 TC 5 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANET JI Earth Moon Planets PD JUN PY 2003 VL 92 IS 1-4 BP 145 EP 156 PG 12 SC Astronomy & Astrophysics; Geosciences, Multidisciplinary GA 829OD UT ISI:000222057600013 ER PT J AU Merin, B Montesinos, B Eiroa, C Solano, E Mora, A D'Alessio, P Calvet, N Oudmaijer, RD de Winter, D Davies, JK Harris, AW Cameron, A Deeg, HJ Ferlet, R Garzon, F Grady, CA Horne, K Miranda, LF Palacios, J Penny, A Quirrenbach, A Rauer, H Schneider, J Wesselius, PR TI Study of the properties and spectral energy distributions of the Herbig AeBe stars HD 34282 and HD 141569 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : pre-main sequence; stars : fundamental parameters; stars : planetary systems : protoplanetary disks ID T-TAURI STARS; INTERMEDIATE-MASS STARS; MAIN-SEQUENCE STARS; PARTICLE-SIZE DISTRIBUTION; VEGA-LIKE STARS; AE/BE STARS; ACCRETION DISKS; CIRCUMSTELLAR DISKS; INFRARED-EMISSION; YOUNG OBJECTS AB We present a study of the stellar parameters, distances and spectral energy distributions (SEDs) of HD 34282 and HD 141569, two pre-main sequence Herbig AeBe stars. Both objects have been reported to show "anomalous positions" in the HR diagram in the sense that they appear below the main sequence. A significant result of this work is that both stars arc metal-deficient. The Hipparcos distance of HD 34282 is very uncertain and the current study places the star at the expected evolutionary position in the HR diagram, i.e. as a PMS star. The distance for HD 141569 found in this work matches the Hipparcos distance, and the problem of its anomalous position is solved as a result of the low metallicity of the object: using the right metallicity tracks, the star is in the PMS region. The SEDs are constructed using data covering ultraviolet to millimetre wavelengths. Physical, non-parametric models, have been applied in order to extract some properties of the disks surrounding the stars. The disk around HD 34282 is accreting actively, it is massive and presents large grains in the mid-plane and small grains in the surface. HD 141569 has a very low mass disk, which is in an intermediate stage towards a debris-type disk. C1 LAEFF, E-28080 Madrid, Spain. Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain. Univ Autonoma Madrid, Dept Fis Teor, Fac Ciencias, E-28049 Madrid, Spain. UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Univ Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, England. TNO, TPD Space Instrumentat, NL-2600 AD Delft, Netherlands. Royal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland. DLR, Dept Planetary Explorat, D-12489 Berlin, Germany. Univ St Andrews, Dept Phys & Astron, St Andrews KY16 9SS, Fife, Scotland. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain. Inst Astrophys, CNRS, F-75014 Paris, France. NASA, Goddard Space Flight Ctr, NOAO, STIS, Greenbelt, MD 20771 USA. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands. Observ Paris, F-92195 Meudon, France. Univ Groningen, SRON, NL-9700 AV Groningen, Netherlands. RP Merin, B, LAEFF, Apartado 50727, E-28080 Madrid, Spain. EM bruno@laeff.esa.es NR 99 TC 19 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2004 VL 419 IS 1 BP 301 EP 318 PG 18 SC Astronomy & Astrophysics GA 831RH UT ISI:000222213300029 ER PT J AU Rowan-Robinson, M Lari, C Perez-Fournon, I Gonzalez-Solares, EA La Franca, F Vaccari, M Oliver, S Gruppioni, C Ciliegi, P Heraudeau, P Serjeant, S Efstathiou, A Babbedge, T Matute, I Pozzi, F Franceschini, A Vaisanen, P Afonso-Luis, A Alexander, DM Almaini, O Baker, AC Basilakos, S Barden, M del Burgo, C Bellas-Velidis, I Cabrera-Guerra, F Carballo, R Cesarsky, CJ Clements, DL Crockett, H Danese, L Dapergolas, A Drolias, B Eaton, N Egami, E Elbaz, D Fadda, D Fox, M Genzel, R Goldschmidt, P Gonzalez-Serrano, JI Graham, M Granato, GL Hatziminaoglou, E Herbstmeier, U Joshi, M Kontizas, E Kontizas, M Kotilainen, JK Kunze, D Lawrence, A Lemke, D Linden-Vornle, MJD Mann, RG Marquez, I Masegosa, J McMahon, RG Miley, G Missoulis, V Mobasher, B Morel, T Norgaard-Nielsen, H Omont, A Papadopoulos, P Puget, JL Rigopoulou, D Rocca-Volmerange, B Sedgwick, N Silva, L Sumner, T Surace, C Vila-Vilaro, B van der Werf, P Verma, A Vigroux, L Villar-Martin, M Willott, CJ Carraminana, A Mujica, R TI The European Large-Area ISO Survey (ELAIS): the final band-merged catalogue SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : formation; galaxies : evolution; galaxies : starburst; cosmology : observations; infrared : galaxies ID HUBBLE-DEEP-FIELD; EXTRAGALACTIC SOURCE COUNTS; X-RAY SURVEY; ACTIVE GALACTIC NUCLEI; STAR-FORMATION HISTORY; 170 MU-M; DATA REDUCTION; FORMATION RATES; SOUTHERN FIELD; HIGH-REDSHIFT AB We present the final band-merged European Large-Area ISO Survey (ELAIS) Catalogue at 6.7, 15, 90 and 175 mum, and the associated data at U, g', r', i', Z, J, H, K and 20 cm. The origin of the survey, infrared and radio observations, data-reduction and optical identifications are briefly reviewed, and a summary of the area covered and the completeness limit for each infrared band is given. A detailed discussion of the band-merging and optical association strategy is given. The total Catalogue consists of 3762 sources. 23 per cent of the 15-mum sources and 75 per cent of the 6.7-mum sources are stars. For extragalactic sources observed in three or more infrared bands, colour-colour diagrams are presented and discussed in terms of the contributing infrared populations. Spectral energy distributions (SEDs) are shown for selected sources and compared with cirrus, M82 and Arp220 starburst, and active galactic nuclei (AGN) dust torus models. Spectroscopic redshifts are tabulated, where available. For the N1 and N2 areas, the Isaac Newton Telescope ugriz Wide Field Survey permits photometric redshifts to be estimated for galaxies and quasars. These agree well with the spectroscopic redshifts, within the uncertainty of the photometric method [similar to10 per cent in (1 + z) for galaxies]. The redshift distribution is given for selected ELAIS bands and colour-redshift diagrams are discussed. There is a high proportion of ultraluminous infrared galaxies (log(10) of 1-1000 mum luminosity L-ir > 12.22) in the ELAIS Catalogue (14 per cent of 15-mum galaxies with known z), many with Arp220-like SEDs. 10 per cent of the 15-mum sources are genuine optically blank fields to r' = 24: these must have very high infrared-to-optical ratios and probably have z > 0.6, so are high-luminosity dusty starbursts or Type 2 AGN. Nine hyperluminous infrared galaxies (L-ir > 13.22) and nine extremely red objects (EROs) (r - K > 6) are found in the survey. The latter are interpreted as ultraluminous dusty infrared galaxies at z similar to 1. The large numbers of ultraluminous galaxies imply very strong evolution in the star formation rate between z = 0 and 1. There is also a surprisingly large population of luminous (L-ir > 11.5), cool (cirrus-type SEDs) galaxies, with L-ir L-opt > 0, implying A(V) > 1. C1 Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, England. Ist Radioastron, I-40129 Bologna, Italy. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, SC de Tenerife, Spain. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England. Univ Studi Roma TRE, Dipartimento Fis, I-00146 Rome, Italy. Univ Padua, Dipartimento Astron, I-35122 Padua, Italy. Univ Sussex, Ctr Astron, Dept Phys & Astron, Brighton BN1 9QJ, E Sussex, England. Osservatorio Astron Bologna, I-40127 Bologna, Italy. Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands. Univ Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7HR, Kent, England. Cyprus Coll, Dept Comp Sci & Engn, CY-1516 Nicosia, Cyprus. European So Observ, Santiago 19, Chile. Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland. ESO, D-85748 Garching, Germany. Univ Cantabria, Consejo Super Invest Cient, Inst Fis Cantabria, E-39005 Santander, Spain. Max Planck Inst Extraterr Phys, D-85740 Garching, Germany. Astron Inst, Natl Observ Athens, GR-11810 Athens, Greece. Univ Cantabria, Dept Matemat Aplicada, E-39005 Santander, Spain. CEA Saclay, F-91191 Gif Sur Yvette, France. SISSA, Int Sch Adv Studies, I-34014 Trieste, Italy. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Max Planck Inst Astron, Konigstuhl MPIA 17, D-69117 Heidelberg, Germany. Univ Athens, Dept Phys, Sect Astrophys Astron & Mech, GR-15783 Zografos, Greece. Univ Turku, Tuorla Observ, FIN-21500 Piikkio, Finland. Niels Bohr Inst Astron Phys & Geophys, Astron Observ, DK-2100 Copenhagen O, Denmark. Danish Space Res Inst, DK-2100 Copenhagen O, Denmark. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Inst Astrophys, F-75014 Paris, France. Leiden Observ, NL-2300 RA Leiden, Netherlands. Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France. Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada. ESTEC, NL-2200 AG Noordwijk, Netherlands. Univ Oxford, Dept Phys, Oxford OX1 3RH, England. Osserv Astron Palermo, Ist Nazl Astrofis, I-90134 Palermo, Italy. Univ Helsinki Observ, FIN-00014 Helsinki, Finland. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. INAOE, Puebla, Mexico. RP Rowan-Robinson, M, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, Prince Consort Rd, London SW7 2BZ, England. EM m.rrobinson@imperial.ac.uk NR 53 TC 52 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUL 11 PY 2004 VL 351 IS 4 BP 1290 EP 1306 DI 10.1111/j.1365-2966.2004.07868.x PG 17 SC Astronomy & Astrophysics GA 834PQ UT ISI:000222423400016 ER PT J AU Fynbo, JPU Sollerman, J Hjorth, J Grundahl, F Gorosabel, J Weidinger, M Moller, P Jensen, BL Vreeswijk, PM Fransson, C Ramirez-Ruiz, E Jakobsson, P Jorgensen, SF Vinter, C Andersen, MI Ceron, JMC Castro-Tirado, AJ Fruchter, AS Greiner, J Kouveliotou, C Levan, A Klose, S Masetti, N Pedersen, H Palazzi, E Pian, E Rhoads, J Rol, E Sekiguchi, T Tanvir, NR Tristram, P Postigo, AD Wijers, RAMJ van den Heuvel, E TI On the afterglow of the X-ray flash of 2003 July 23: Photometric evidence for an off-axis gamma-ray burst with an associated supernova? SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; gamma rays : bursts; supernovae : general; X-rays : individual (XRF 030723) ID 25 APRIL 1998; LIGHT CURVES; HOST GALAXY; OPTICAL PHOTOMETRY; RELATIVISTIC JETS; DUST ECHOES; SPECTROSCOPY; SPECTRA; GRB-000926; DISCOVERY AB We present optical and near-infrared follow-up observations of the X-ray flash (XRF) of 2003 July 23. Our observations in the R band cover the temporal range from 4.2 hr to 64 days after the high-energy event. We also present the results of multicolor imaging extending to the K band on three epochs. The light curve of the R-band afterglow the first week after the burst is similar to the light curve for long-duration gamma-ray bursts (GRBs), i.e., a broken power law with a late time slope of alpha approximate to 2.0 (F-nu proportional to t(-alpha)). Furthermore, the spectral energy distribution (SED) has a power-law (F-nu proportional to nu(-beta)) shape with slope beta approximate to 1.0. However, the decay slope at t < 1 day is shallow, consistent with zero. This is in qualitative agreement with the prediction that XRFs are off-axis classical GRBs. After the first week there is a strong bump in the light curve, which peaks at around 16 days. The SED after the peak becomes significantly redder. We discuss the possible interpretations of this bump and conclude that an underlying supernova is the most likely explanation since no other model appears consistent with the evolution of the SED. Finally, we present deep spectroscopy of the burst both in the afterglow and in the bump phase. A firm upper limit of z = 2.3 is placed on the redshift of XRF 030723 from the lack of Lyα forest lines in the spectrum of the afterglow. The lack of significant absorption and emission lines in either of the two spectra excludes a spectroscopic redshift determination. C1 Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. AlbaNova, Dept Astron, Stockholm Observ, S-10691 Stockholm, Sweden. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. European So Observ, D-85748 Garching, Germany. European So Observ, Santiago 19, Chile. Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. NASA, Univ Res Assoc, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. CNR, IASF, Sez Bologna, I-40129 Bologna, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Univ Canterbury, Mt John Observ, Lake Tekapo, New Zealand. RP Fynbo, JPU, Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. NR 90 TC 58 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUL 10 PY 2004 VL 609 IS 2 PN Part 1 BP 962 EP 971 PG 10 SC Astronomy & Astrophysics GA 835BZ UT ISI:000222456200037 ER PT J AU Aguero, F Ben Abdellah, K Tekiel, V Sanchez, DO Gonzalez, A TI Generation and analysis of expressed sequence tags from Trypanosoma cruzi trypomastigote and amastigote cDNA libraries SO MOLECULAR AND BIOCHEMICAL PARASITOLOGY LA English DT Article DE trypanosoma cruzi; EST; trypomastigote; amastigote; cDNA library ID RIBOSOMAL-PROTEIN; GENE DISCOVERY; MESSENGER-RNA; IDENTIFICATION; PARASITE AB We have generated 2771 expressed sequence tags (ESTs) from two cDNA libraries of Trypanosoma cruzi CL-Brener. The libraries were constructed from trypomastigote and amastigotes, using a spliced leader primer to synthesize the cDNA second strand, thus selecting for full-length cDNAs. Since the libraries were not normalized nor pre-screened, we compared the representation of transcripts between the two using a statistical test and identify a subset of transcripts that show apparent differential representation. A non-redundant set of 1619 reconstructed transcripts was generated by sequence clustering. This dataset was used to perform similarity searches against protein and nucleotide databases. Based on these searches, 339 sequences could be assigned a putative identity. One thousand one-hundred and sixteen sequences in the non-redundant clustered dataset (68.8%) are new expression tags, not represented in the T cruzi epimastigote ESTs that are in the public databases. Additional information is provided online at http://genoma.unsam.edu.ar/projects/tram. To the best of our knowledge these are the first ESTs reported for the life cycle stages of T cruzi that occur in the vertebrate host. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Nacl Gen San Martin, CONICET, Inst Invest Biotecnol, Buenos Aires, DF, Argentina. CSIC, Inst Parasitol & Biomed, Granada, Spain. RP Aguero, F, Univ Nacl Gen San Martin, CONICET, Inst Invest Biotecnol, Buenos Aires, DF, Argentina. EM fernan@iib.unsam.edu.ar NR 22 TC 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-6851 J9 MOL BIOCHEM PARASITOL JI Mol. Biochem. Parasitol. PD AUG PY 2004 VL 136 IS 2 BP 221 EP 225 DI 10.1016/j.molbiopara.2004.04.002 PG 5 SC Biochemistry & Molecular Biology; Parasitology GA 835OR UT ISI:000222493600011 ER PT J AU Martin-Sanchez, J Navarro-Mari, JM Pasquau-Liano, J Salomon, OD Morillas-Marquez, F TI Visceral leishmaniasis caused by Leishmania infantum in a Spanish patient in Argentina: What is the origin of the infection? Case report SO BMC INFECTIOUS DISEASES LA English DT Article ID CUTANEOUS LEISHMANIASIS; TRAVELERS AB Background: The question "Where have you been?" is a common one asked by doctors in Northern Europe and America when faced with clinical symptoms not typical of their country. This question must also arise in the clinics of developing countries in which non-autochthonous cases such as the one described here can appear. Important outbreaks of Leishmania infantum have been recorded in the last decade in several Latin American countries but its presence has not yet been recorded in Argentina. We report the first case of visceral leishmaniasis owing to L. infantum in this country. Case presentation: A 71-year-old Spanish woman who has been living in Mendoza, Argentina, during the last 40 years presented with a history of high fever and shivering, anemia, leukopenia and splenomegaly over two years. Argentinian doctors did not suspect visceral leishmaniasis even when the histological analysis revealed the presence of "intracytoplasmatic spheroid particles compatible with fungal or parasitic infection". After a serious deterioration in her health, she was taken to Spain where she was evaluated and visceral leishmaniasis was established. Specific identification of the parasite was done by PCR-ELISA, isoenzyme electrophoresis and RAPD-PCR. Conclusion: We would like to point out that: i) cases such as the one described here, which appear in non-endemic areas, can pass unnoticed by the clinical physician. ii) in countries in which these introduced cases reside, in-depth parasitological studies are required into vectors and possible reservoirs to rule out the rare case of local infection and, once infection has taken place, to ensure that this does not spread by anthroponotic transmission or a competent reservoir. C1 Univ Granada, Fac Farm, Dept Parasitol, E-18071 Granada, Spain. Hosp Univ Virgen Nieves, Microbiol Serv, Granada, Spain. Hosp Univ Virgen Nieves, Unidad Enfermedades Infecciosas, Granada, Spain. Minist Salud, Adm Nacl Labs & Inst Salud Dr Carlos G Malbran, CeNDIE, Buenos Aires, DF, Argentina. RP Martin-Sanchez, J, Univ Granada, Fac Farm, Dept Parasitol, Campus Univ Cartuja, E-18071 Granada, Spain. EM joaquina@ugr.es josem.navarro.sspa@juntadeandalucia.es pascuau@juntadeandalucia.es danielsalomon@hotmail.com fmorilla@ugr.es NR 33 TC 4 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1471-2334 J9 BMC INFECT DIS JI BMC Infect. Dis. PD JUN 29 PY 2004 VL 4 AR 20 DI 10.1186/1471-2334-4-20 PG 5 SC Infectious Diseases GA 837FR UT ISI:000222614400002 ER PT J AU Lorente, SO Rodrigues, JCF Jimenez, CJ Joyce-Menekse, M Rodrigues, C Croft, SL Yardley, V de Luca-Fradley, K Ruiz-Perez, LM Urbina, J de Souza, W Pacanowska, DG Gilbert, IH TI Novel azasterols as potential agents for treatment of leishmaniasis and trypanosomiasis SO ANTIMICROBIAL AGENTS AND CHEMOTHERAPY LA English DT Article ID METHYL TRANSFERASE INHIBITORS; SCHIZOTRYPANUM CRUZI; IN-VITRO; DELTA-24-STEROL METHYLTRANSFERASE; ULTRASTRUCTURAL ALTERATIONS; STEROL COMPOSITION; SACCHAROMYCES-CEREVISIAE; ERGOSTEROL BIOSYNTHESIS; CANDIDA-ALBICANS; BRUCEI AB This paper describes the design and evaluation of novel azasterols as potential compounds for the treatment of leishmaniasis and other diseases caused by trypanosomatid parasites. Azasterols are a known class of (S)-adenosyl-L-methionine: Delta(24)-sterol methltransferase(24-SMT) inhibitors in fungi, plants, and some parasitic protozoa. The compounds prepared showed activity at micromolar and nanomolar concentrations when tested against Leishmania spp. and Trypanosoma spp. The enzymatic and sterol composition studies indicated that the most active compounds acted by inhibiting 24-SMT. The role of the free hydroxyl group at position 3 of the sterol nucleus was also probed. When an acetate was attached to the 3beta-OH, the compounds did not inhibit the enzyme but had an effect on parasite growth and the levels of sterols in the parasite, suggesting that the acetate group was removed in the organism. Thus, an acetate group on the 3beta-OH may have application as a prodrug. However, there may be an additional mode(s) of action for these acetate derivatives. These compounds were shown to have ultrastructural effects on Leishmania amazonensis promastigote membranes, including the plasma membrane, the mitochondrial membrane, and the endoplasmic reticulum. The compounds were also found to be active against the bloodstream form (trypomastigotes) of Trypanosoma brucei rhodesiense, a causative agent of African trypanosomiasis. C1 Univ Wales Coll Cardiff, Welsh Sch Pharm, Cardiff CF10 3XF, S Glam, Wales. Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1E 7HT, England. Univ Fed Rio de Janeiro, Ctr Ciencias Saude, Lab Ultraestrutura Celular Hertha Meyer, Inst Biofis Carlos Chagas Filho, BR-21949900 Rio De Janeiro, Brazil. Inst Parasitol & Biomed Lopez Neyra, Granada 18001, Spain. Inst Venezolano Invest Cient, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020A, Venezuela. RP Gilbert, IH, Univ Wales Coll Cardiff, Welsh Sch Pharm, Redwood Bldg,King Edward VII Ave, Cardiff CF10 3XF, S Glam, Wales. EM gilbertih@cf.ac.uk NR 37 TC 22 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0066-4804 J9 ANTIMICROB AGENTS CHEMOTHER JI Antimicrob. Agents Chemother. PD AUG PY 2004 VL 48 IS 8 BP 2937 EP 2950 DI 10.1128/AAC.48.8.2937-2950.2004 PG 14 SC Microbiology; Pharmacology & Pharmacy GA 842IV UT ISI:000222998300023 ER PT J AU Nogales, FF Musto, ML Saez, AI Robledo, M Palacios, J Aneiros, J TI Multifocal intrafollicular granulosa cell tumor of the ovary associated with an unusual germline p53 mutation SO MODERN PATHOLOGY LA English DT Article DE granulosa cell tumor; p53 gene mutation; Li Fraumeni syndrome; childhood malignant adrenocortical tumor ID LI-FRAUMENI-SYNDROME; TP53 MUTATIONS; CANCER AB A 23-year-old woman presented with a 7 cm right multicystic mass in the ovary, which corresponded microscopically to an unusual lesion consisting of a multifocal granulosa cell tumor with intrafollicular ('in situ') growth involving two-thirds of mature follicles. Stromal invasion was found in only one area where neoplastic follicles coalesced. Granulosa cells had atypical, bizarre TP53 positive nuclei with hyperchromatism, abundant mitoses and numerous hyaline globules. The contralateral ovary was normal. From the age of 10 years, the patient had a complex medical history of multiple tumors, including telangiectatic osteosarcoma, typical and malignant phyllodes tumor, reticulohistiocytoma of skin, carcinomas of the breast and lipo- and leiomyosarcoma. The female genital tract also harbored myometrial leiomyomas and an early endometrial carcinoma. Retrospective histologic study of all mesenchymal neoplasms in this patient showed, the conspicuous presence of similar bizarre TP53 positive cells with hyaline globules in all the mesenchymal neoplasms. In the genetic study, a germline p53 gene mutation was detected in exon 10, codon 336, generating a stop codon in the oligomerization domain of the protein (E336X). A further p53 mutation was found in exon 7 in the granulosa cell tumor. Mutation occurred de novo since there was no history of tumors in any family members, all of whom had a wild-type p53. Although this patient shows a typical tumor phenotype of Li Fraumeni syndrome, the germline mutation corresponded to a highly unusual mutated domain, which is similar to the one found in childhood malignant adrenocortical tumor; also a rare neoplasm that originates in adrenocortical cells; which are closely related, both functionally and embryologically, to granulosa cells. C1 Univ Hosp Granada, Dept Anat Patol, Fac Med, Granada 18012 11, Spain. Univ Hosp Granada, Dept Pathol, Granada, Spain. Univ Montevideo, Montevideo, Uruguay. CNIO, Madrid, Spain. RP Nogales, FF, Univ Hosp Granada, Dept Anat Patol, Fac Med, Granada 18012 11, Spain. EM fnogales@ugr.es NR 19 TC 2 PU NATURE PUBLISHING GROUP PI NEW YORK PA 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 USA SN 0893-3952 J9 MODERN PATHOL JI Mod. Pathol. PD JUL PY 2004 VL 17 IS 7 BP 868 EP 873 DI 10.1038/modpathol.3800133 PG 6 SC Pathology GA 843WR UT ISI:000223118200017 ER PT J AU Gorosabel, J Rol, E Covino, S Castro-Tirado, AJ Ceron, JMC Lazzati, D Hjorth, J Malesani, D Della Valle, M di Serego Alighieri, S Fiore, F Fruchter, AS Fynbo, JPU Ghisellini, G Goldoni, P Greiner, J Israel, GL Kaper, L Kawai, N Klose, S Kouveliotou, C Le Floc'h, E Masetti, N Mirabel, F Moller, P Ortolani, S Palazzi, E Pian, E Rhoads, J Ricker, G Saracco, P Stella, L Tagliaferri, G Tanvir, N van den Heuvel, E Vietri, M Vreeswijk, PM Wijers, RAMJ Zerbi, FM TI GRB 020813: Polarization in the case of a smooth optical decay SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; techniques : photometric; techniques : polarimetric ID GAMMA-RAY BURSTS; GRB 990510; LINEAR-POLARIZATION; LIGHT CURVES; AFTERGLOW; GRB-021004; RADIATION AB We present the results of a VLT polarimetric monitoring campaign of the GRB 020813 optical afterglow carried out in three nights, from 0.88 to 4.20 days after the gamma-ray event. The mean values of the degree of linear polarization (P) and its position angle (theta) resulting from our campaign are

= 1.18 +/- 0.10% and = 148.7degrees +/- 2.3degrees, after correcting for Galactic interstellar polarization. Our VLT data set is most naturally described by a constant degree of linear polarization and position angle, nonetheless a slow theta evolution cannot be entirely ruled out by our data. The VLT monitoring campaign did not reveal either a significant theta rotation respect to the Keck spectropolarimetric observations performed similar to0.25 days after the GRB (Barth et al. 2003). However,

is a factor of two lower than the polarization degree measured from Keck. Additionally, the VLT polarization data allowed us to construct an accurate V-band light curve. The V-band photometric data revealed a smooth light curve with a break located between the last Keck and our first VLT polarimetric measurement, 0.33 < t(break,V) < 0.88 days after the GRB. The typical magnitude fluctuations of the VLT V-band lightcurve are 0.003 mag, 0.010 mag and 0.016 mag for our three observing nights, respectively. We speculate that the stability of theta might be related to the smoothness of the light curve. C1 CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. Osserv Astron Brera, INAF, I-23807 Merate, LC, Italy. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen O, Denmark. ISAS, SISSA, Int Sch Adv Studies, I-34016 Trieste, Italy. Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy. Osserv Astron Roma, INAF, I-00044 Frascati, Italy. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. LOrme Merisiers, DAPNIA, DSM, CEA, Gif Sur Yvette, France. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Tokyo Inst Technol, Fac Sci, Dept Phys, Meguro Ku, Tokyo 1528551, Japan. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. NASA, MSFC, Huntsville, AL 35812 USA. CNR, Inst Astrofis Spaziale & Fis Cosm, I-40129 Bologna, Italy. European So Observ, D-85748 Garching, Germany. Univ Padua, Dipartimento Astron, I-35122 Padua, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. MIT, Ctr Space Res, Cambridge, MA 02139 USA. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Scuola Normale Super Pisa, I-56100 Pisa, Italy. European So Observ, Santiago 19, Chile. RP Gorosabel, J, CSIC, Inst Astrofis Andalucia, POB 03004, Granada 18080, Spain. EM jgu@iaa.es NR 41 TC 11 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2004 VL 422 IS 1 BP 113 EP 119 DI 10.1051/0004-6361:20034409 PG 7 SC Astronomy & Astrophysics GA 844PE UT ISI:000223171300017 ER PT J AU Gotz, D Mereghetti, S Hurley, K Deluit, S Feroci, M Frontera, F Fruchter, A Gorosabel, J Hartmann, DH Hjorth, J Hudec, R Mirabel, IF Pian, E Pizzichini, G Ubertini, P Winkler, C TI GRB 030131: a long Gamma-Ray Burst detected with INTEGRAL during a satellite slew SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article ID 28 FEBRUARY 1997; BATSE OBSERVATIONS; OPTICAL-EMISSION; SPECTRA; AFTERGLOW; DISCOVERY AB A long Gamma-Ray Burst (GRB) was detected with the instruments on board the INTEGRAL satellite on January 31 2003. Although most of the GRB, which lasted similar to150 seconds, occurred during a satellite slew, the automatic software of the INTEGRAL Burst Alert System was able to detect it in near-real time. Here we report the results obtained with the IBIS instrument, which detected GRB 030131 in the 15 keV - 200 keV energy range, The burst displays a complex time profile with numerous peaks. The peak spectrum can be described by a single power law with photon index Gamma similar or equal to 1.7 and has a flux of similar to2 photons cm(-2) s(-1) in the 20-200 keV energy band. The high sensitivity of IBIS has made it possible for the first time to perform detailed time-resolved spectroscopy of a GRB with a fluence of 7 x 10(-6) erg cm(-2) (20-200 keV). C1 CNR, IASF, I-20133 Milan, Italy. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Integral Sci Data Ctr, CH-1290 Versoix, Switzerland. IASF, CNR, Sez Roma, I-00133 Rome, Italy. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Acad Sci Czech Republ, Inst Astron, CZ-25165 Ondrejov, Czech Republic. CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France. Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina. Osserv Astron Trieste, I-34131 Trieste, Italy. CNR, IASF, Sez Bologna, I-40129 Bologna, Italy. ESA, Estec, RSSD, NL-2201 AZ Noordwijk, Netherlands. RP Gotz, D, CNR, IASF, Via Bassini 15, I-20133 Milan, Italy. NR 20 TC 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUPPL JI Nucl. Phys. B-Proc. Suppl. PD JUN PY 2004 VL 132 BP 316 EP 319 DI 10.1016/j.nuclphysbps.2004.04.056 PG 4 SC Physics, Particles & Fields GA 845FX UT ISI:000223224300058 ER PT J AU Sampedro, I Aranda, E Scervino, JM Fracchia, S Garcia-Romera, I Ocampo, JA Godeas, A TI Improvement by soil yeasts of arbuscular mycorrhizal symbiosis of soybean (Glycine max) colonized by Glomus mosseae SO MYCORRHIZA LA English DT Review DE arbuscular mycorrhizas; Crytococcus laurentii; Glomus mosseae; Rhodotorula mucilaginosa; Saccharomyces kunashirensis; soil yeasts ID PSEUDOMONAS-PUTIDA; FUSARIUM-OXYSPORUM; CULTURE FRACTIONS; ROOT COLONIZATION; PLANT-GROWTH; VAM FUNGI; BACTERIA; INOCULATION; RHIZOSPHERE; INFECTION AB The effects of the soil yeasts Rhodotorula mucilaginosa, Cryptococcus laurentii and Saccharomyces kunashirensis on the arbuscular mycorrhizal (AM) fungus Glomus mosseae (BEG 12) was studied in vitro and in greenhouse trials. The presence of yeasts or their soluble and volatile exudates stimulated the percentage spore germination and hyphal growth of G. mosseae. Percentage root length colonized by G. mosseae and plant dry matter of soybean (Glycine max L. Merill) were increased only when the soil yeasts were inoculated prior to the AM fungus. Higher beneficial effects on AM colonization and plant dry matter were found when the soil yeasts were inoculated as an aqueous solution rather than as a thin agar slice. Although soluble and volatile exudates of yeasts benefited the AM symbiosis, their modes of action were different. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Buenos Aires, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina. RP Garcia-Romera, I, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Prof Albareda 1,Apdo 419, E-18008 Granada, Spain. EM igarcia@eez.csic.es NR 33 TC 5 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0940-6360 J9 MYCORRHIZA JI Mycorrhiza PD AUG PY 2004 VL 14 IS 4 BP 229 EP 234 DI 10.1007/s00572-003-0285-y PG 6 SC Mycology GA 846DO UT ISI:000223295500002 ER PT J AU Perez-Mendoza, D Dominguez-Ferreras, A Munoz, S Soto, MJ Olivares, J Brom, S Girard, L Herrera-Cervera, JA Sanjuan, J TI Identification of functional mob regions in Rhizobium etli: Evidence for self-transmissibility of the symbiotic plasmid pRetCFN42d SO JOURNAL OF BACTERIOLOGY LA English DT Article ID GRAM-NEGATIVE BACTERIA; CONJUGAL TRANSFER; AGROBACTERIUM-TUMEFACIENS; BRADYRHIZOBIUM-JAPONICUM; SINORHIZOBIUM-MELILOTI; LEGUMINOSARUM STRAIN; REGULATORY SYSTEM; ESCHERICHIA-COLI; EXPRESSION; CLONING AB An approach originally designed to identify functional origins of conjugative transfer (oriT or mob) in a bacterial genome (J. A. Herrera-Cervera, J. M. Sanjuan-Pinilla, J. Olivares, and J. Sanjuan, J. Bacteriol. 180:4583-4590, 1998) was modified to improve its reliability and prevent selection of undesired false mob clones. By following this modified approach, we were able to identify two functional mob regions in the genome of Rhizobium etli CFN42. One corresponds to the recently characterized transfer region of the nonsymbiotic, self-transmissible plasmid pRetCFN42a (C. Tun-Garrido, P. Bustos, V. Gonzalez, and S. Brom, J. Bacteriol. 185:1681-1692, 2003), whereas the second mob region belongs to the symbiotic plasmid pRetCFN42d. The new transfer region identified contains a putative oriT and a typical conjugative (tra) gene cluster organization. Although pRetCFN42d had not previously been shown to be self-transmissible, mobilization of cosmids containing this tra region required the presence of a wild-type pRetCFN42d in the donor cell; the presence of multiple copies of this mob region in CFN42 also promoted conjugal transfer of the Sym plasmid pRetCFN42d. The overexpression of a small open reading frame, named yp028, located downstream of the putative relaxase gene traA, appeared to be responsible for promoting the conjugal transfer of the R. etli pSym under laboratory conditions. This yp028-dependent conjugal transfer required a wild-type pRetCFN42d traA gene. Our results suggest for the first time that the R. etli symbiotic plasmid is self-transmissible and that its transfer is subject to regulation. In wild-type CFN42, pRetCFN42d tra gene expression appears to be insufficient to promote plasmid transfer under standard laboratory conditions; gene yp028 may play some role in the activation of conjugal transfer in response to as-yet-unknown environmental conditions. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Granada 18008, Spain. UNAM, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca, Morelos, Mexico. RP Sanjuan, J, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Prof Albareda 1, Granada 18008, Spain. EM juan.sanjuan@eez.csic.es NR 55 TC 7 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD SEP PY 2004 VL 186 IS 17 BP 5753 EP 5761 DI 10.1128/JB.186.17.5753-5761.2004 PG 9 SC Microbiology GA 848HX UT ISI:000223459300022 ER PT J AU Ponce, MA Scervino, JM Erra-Balsells, R Ocampo, JA Godeas, AM TI Flavonoids from shoots and roots of Trifolium repens (white clover) grown in presence or absence of the arbuscular mycorrhizal fungus Glomus intraradices SO PHYTOCHEMISTRY LA English DT Article DE white clover; Trifolium repens; leguminosae; shoots; roots; flavonoids; flavones; chalcone; Glomus intraradices; 4 ',5,6,7,8-pentahydroxy-3-methoxyflavone; 5,6,7,8-tetrahydroxy-3-methoxyflavone; 3,7-dihydroxy-4 '-methoxyflavone; 5,6,7,8-tetrahydroxy-4 '-methoxyflavone ID EXUDATE FLAVONOIDS AB White clover (Trifolium repens) plants were grown in the presence or absence of the arbuscular mycorrhizal fungus Glomus intraradices. Flavones, 4',5,6,7,8-pentahydroxy-3-methoxyflavone and 5,6,7,8-tetrahydroxy-3-methoxyflavone, as well as two flavones 3,7-dihydroxy-4'-methoxyflavone and 5,6,7,8-tetrahydroxy-4'-methoxyflavone never previously reported in plants, were isolated. The known 3,5,6,7,8-pentahydroxy-4-methoxyflavone, 2',3',4',5',6'-pentahydroxy-chalcone, 6-hydroxykaempferol, 4',5,6,7,8-pentahydroxyflavone and 3,4'-dimethoxykaempferol were also obtained. Analysis of extracts obtained from roots and shoots revealed that the compositions of the flavonoid mixtures varied with growing conditions. Quercetin, acacetin and rhamnetin accumulated in roots of inoculated plants, whereas they were not detected in non-inoculated plants. (C) 2004 Published by Elsevier Ltd. C1 Univ Buenos Aires, CONICET, CIHIDECAR, Fac Ciencias Exactas & Nat,Dept Quim Organ, RA-1428 Buenos Aires, DF, Argentina. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Biodiversidad & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. RP Ponce, MA, Univ Buenos Aires, CONICET, CIHIDECAR, Fac Ciencias Exactas & Nat,Dept Quim Organ, Pabellon 2,3P Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina. EM henryh@qo.fcen.uba.ar NR 31 TC 14 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0031-9422 J9 PHYTOCHEMISTRY JI Phytochemistry PD JUL PY 2004 VL 65 IS 13 BP 1925 EP 1930 DI 10.1016/j.phytochem.2004.06.005 PG 6 SC Biochemistry & Molecular Biology; Plant Sciences GA 848YM UT ISI:000223504100007 ER PT J AU Lacy, CHS Vaz, LPR Claret, A Sabby, JA TI Absolute properties of the main-sequence eclipsing binary star V885 Cygni SO ASTRONOMICAL JOURNAL DT Article DE binaries : eclipsing; binaries : spectroscopic; stars : evolution; stars : fundamental parameters; stars : individual (V885 Cygni) ID LIGHT CURVES; SYNCHRONIZATION TIMES; PHOTOMETRY; VELOCITY; CIRCULARIZATION; MODELS AB We present 4179 differential observations in the V filter measured by a robotic telescope, as well as 25 pairs of radial velocities from high-resolution spectroscopic observations, of the detached, EB-type, 1.69 day period double-lined eclipsing binary star V885 Cyg. Absolute dimensions of the components are determined with high precision (better than 1.5% in the masses and radii) for the purpose of testing various aspects of theoretical modeling. We obtain 2.005 +/- 0.029 M-circle dot and 2/345 +/- 0.012 R-circle dot for the hotter, but smaller, less massive and less luminous photometric primary (star A), and 2.234 +/- 0.026 M-circle dot and 3.385 +/- 0.026 R-circle dot for the cooler, larger, more massive and more luminous photometric secondary (star B). The effective temperatures and interstellar reddening of the stars are accurately determined from uvbybeta photometry: 8375 +/- 150 K for the primary, 8150 +/- 150 K for the secondary - corresponding to spectral types of A3m and A4m - and 0.058 mag for Eb-y. The metallic-lined character of the stars is revealed by high-resolution spectroscopy and uvbybeta photometry. The orbits are circular, and spectral line widths give observed rotational velocities that are synchronous with the orbital motion for both components. The components of V885 Cyg are main-sequence stars with an age of about 500 Myr according to models. Our estimate of the age of this system would seem to favor the hydrodynamic damping formalism of Tassoul & Tassoul in this particular case, since both the components' spins are synchronous and the orbit is circular. C1 Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA. Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Lacy, CHS, Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA. EM clacy@uark.edu lpv@fisica.ufmg.br claret@iaa.es jsabby@uark.edu NR 36 TC 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD SEP PY 2004 VL 128 IS 3 BP 1324 EP 1330 PG 7 SC Astronomy & Astrophysics GA 850SW UT ISI:000223633800027 ER PT J AU Gil, MA Lopez, CM Cuadra, MED Sanchez, JA Coca, BM Martinez, SP Zueco, JC TI 'Amalia': A medium-fruit-size, heat-tolerant tomato cultivar for tropical conditions SO HORTSCIENCE LA English DT Editorial Material DE Lycopersicon esculentum; fruit set; heat tolerance; Alternaria solani; early blight; disease resistance ID EARLY BLIGHT RESISTANCE C1 CSIC, Estac Expt La Mayora, E-29750 Malaga, Spain. Inst Nacl Ciencias Agricolas, Havana 32700, Cuba. Ctr Nacl Sanidad Agropecuaria, Havana 32700, Cuba. RP Zueco, JC, CSIC, Estac Expt La Mayora, Algarrobo-Costa, E-29750 Malaga, Spain. EM cuartero@eelm.csic.es NR 13 TC 0 PU AMER SOC HORTICULTURAL SCIENCE PI ALEXANDRIA PA 113 S WEST ST, STE 200, ALEXANDRIA, VA 22314-2851 USA SN 0018-5345 J9 HORTSCIENCE JI Hortscience PD OCT PY 2004 VL 39 IS 6 BP 1503 EP 1504 PG 2 SC Horticulture GA 861LL UT ISI:000224417900083 ER PT J AU Osorio, M Anglada, G Lizano, S D'Alessio, P TI A model to test the internal structure of the G31.41+0.31 hot molecular core SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE radiative transfer; radio lines : ISM; stars : formation; ISM : individual (G31.41+0.31) ID COMPACT HII-REGIONS; STAR-FORMATION AB We investigate the physical conditions of the material around massive protostars by modelling the so-called hot molecular cores. We present a model for the spectral energy distribution ( SED) as well as the ammonia line emission of the G31.41+0.31 hot core. We find that the best fit to the SED is achieved by assuming a density distribution corresponding to the collapse of a magnetized logatropic sphere. On the other hand, the line emission is reproduced by adopting a gas phase ammonia abundance increasing towards the center of the core, as a result of the release of the ammonia molecules trapped in ice grain mantles. C1 CSIC, Inst Astrofis Andalucia, Granada, Spain. UNAM, Ctr Radioastron & Astrofis, Morelia, Michoacan, Mexico. RP Osorio, M, CSIC, Inst Astrofis Andalucia, Granada, Spain. EM osorio@iaa.es NR 10 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2004 VL 292 IS 1-4 BP 369 EP 374 PG 6 SC Astronomy & Astrophysics GA 862AM UT ISI:000224461300046 ER PT J AU Klose, S Greiner, J Rau, A Henden, AA Hartmann, DH Zeh, A Ries, C Masetti, N Malesani, D Guenther, E Gorosabel, J Stecklum, B Antonelli, LA Brinkworth, C Ceron, JMC Castro-Tirado, AJ Covino, S Fruchter, A Fynbo, JPU Ghisellini, G Hjorth, J Hudec, R Jelinek, M Kaper, L Kouveliotou, C Lindsay, K Maiorano, E Mannucci, F Nysewander, M Palazzi, E Pedersen, K Pian, E Reichart, DE Rhoads, J Rol, E Smail, I Tanvir, NR Postigo, AD Vreeswijk, PM Wijers, RAMJ van den Heuvel, EPJ TI Probing a gamma-ray burst progenitor at a redshift of z=2: A comprehensive observing campaign of the afterglow of GRB 030226 SO ASTRONOMICAL JOURNAL LA English DT Article DE gamma rays : bursts; stars : Wolf-Rayet ID HIGH COLUMN DENSITY; MASS-LOSS RATES; OPTICAL AFTERGLOW; STANDARD STARS; HOST GALAXY; ETA-CARINAE; LINEAR-POLARIZATION; SUPERNOVA 2003DH; LIGHT CURVES; STELLAR WIND AB We report results from a comprehensive follow-up observing campaign of the afterglow of GRB 030226, including VLT spectroscopy, VLT polarimetry, and Chandra X-ray observations. In addition, we present BOOTES-1 wide-field observations at the time of the occurrence of the burst. First observations at ESO started 0.2 days after the event when the gamma ray burst ( GRB) afterglow was at a magnitude of R similar to 19 and continued until the afterglow had faded below the detection threshold (R> 26). No underlying host galaxy was found. The optical light curve shows a break around 0.8 days after the burst, which is achromatic within the observational errors, supporting the view that it was due to a jetted explosion. Close to the break time the degree of linear polarization of the afterglow light was less than 1.1%, which favors a uniform-jet model rather than a structured one. VLT spectra show two absorption line systems at redshifts z = 1.962 +/- 0.001 and 1.986 +/- 0.001, placing the lower limit for the redshift of the GRB close to 2. We emphasize that the kinematics and the composition of the absorbing clouds responsible for these line systems are very similar to those observed in the afterglow of GRB 021004. This corroborates the picture in which at least some GRBs are physically related to the explosion of a Wolf-Rayet star. C1 Thuringer Landessternwarte Tautenberg, D-07778 Tautenburg, Germany. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. USN Observ, Univ Space Res Assoc, Flagstaff, AZ 86001 USA. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. Wendelstein Observ, D-81679 Munich, Germany. CNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. SISSA, ISAS, I-34014 Trieste, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Osserv Astron Roma, Ist Nazl Astrofis, I-00040 Monte Porzio Catone, Italy. Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England. Osserv Astron Brera, Ist Nazl Astrofis, I-23807 Merate, LC, Italy. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Acad Sci Czech Republ, Inst Astron, CZ-25165 Ondrejov, Czech Republic. Univ Amsterdam, NL-1098 SJ Amsterdam, Netherlands. Natl Space Sci & Technol Ctr, Huntsville, AL 35805 USA. Univ Bologna, Dipartimento Astron, I-40129 Bologna, Italy. CNR, Ist Radioastron, Sez Firenze, I-50125 Florence, Italy. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Osserv Astron Trieste, Ist Nazl Astrofis, I-34131 Trieste, Italy. Univ Durham, Inst Computat Cosmol, Durham DH1 3LE, England. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. European So Observ, Santiago 19, Chile. RP Klose, S, Thuringer Landessternwarte Tautenberg, Sternwarte 5, D-07778 Tautenburg, Germany. NR 100 TC 37 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD NOV PY 2004 VL 128 IS 5 BP 1942 EP 1954 PG 13 SC Astronomy & Astrophysics GA 867TX UT ISI:000224866500002 ER PT J AU Chapellier, E Mathias, P Garrido, R Le Contel, JM Sareyan, JP Ribas, I Parrao, L Moya, A Pena, JH Alvarez, M TI HD 173977: An ellipsoidal delta Scuti star variable SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : binaries : general; stars : oscillations; techniques : photometric; techniques : spectroscopic; stars : variables : delta Sct ID GAMMA-DORADUS CANDIDATES AB We present spectroscopic and photometric observations of the star HD173977. It appears that the star is part of a double line binary system, with a period of 1.801 d, corresponding to twice the period of the photometric variations. Hence the star is an ellipsoidal variable. The system is probably synchronized. The physical parameters of both components were derived through two independant methods, one based on evolutionary tracks, the other being the result of the behaviour of light curves in a close binary system. After removing the ellipsoidal variations, 3 frequencies are detected in the photometric data: 8.56, 14.51 and 16.42 d(-1), while 2 additional frequencies are also possible: 10.96 and 12.11 d(-1). In accordance with its position in the HR diagram, the primary component of HD173977 should be considered as a delta Scuti star and no longer as a gamma Doradus star. In addition, HD173844, used as a check star, is discovered variable with a 15.79 d(-1) frequency and is classified as a delta Scuti star. C1 Observ Cote Azur, Dept GEMINI, UMR 6203, F-06304 Nice 4, France. Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. UNAM, Inst Astron, Ensenada, Baja California, Mexico. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Chapellier, E, Observ Cote Azur, Dept GEMINI, UMR 6203, BP 4229, F-06304 Nice 4, France. EM eric@obs-nice.fr mathias@obs-nice.fr NR 15 TC 3 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2004 VL 426 IS 1 BP 247 EP 252 DI 10.1051/0004-6361:20034068 PG 6 SC Astronomy & Astrophysics GA 869ED UT ISI:000224965300028 ER PT J AU Lisenfeld, U Braine, J Duc, PA Brinks, E Charmandaris, V Leon, S TI Molecular and ionized gas in the tidal tail in Stephan's Quintet SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : formation; ISM : molecules; galaxies : clusters : individual : Stephan's Quintet; galaxies : interactions; galaxies : ISM; galaxies : intergalactic medium ID PHYSICAL CONDITIONS; INTRAGROUP MEDIUM; GALAXIES; EMISSION; STARBURST; (CO)-C-13; OBJECTS; MERGERS; REGIONS AB We have mapped with the IRAM interferometer at Plateau de Bure (PdBI) the (CO)-C-12 emission towards intergalactic star forming regions located in the tidal tail stemming from NGC 7319, in the Stephan's Quintet compact group of galaxies. The (CO)-C-13 emission of the same region was observed with the IRAM 30 m telescope and optical spectroscopy of several H.. regions in the area were obtained with the Calar Alto 3.5 m telescope. We recovered with the interferometer about 50% of the (CO)-C-12(1-0) total emission that had been earlier measured with single dish observations (Lisenfeld 2002, A&A, 394, 823), indicating that about half of the molecular gas is distributed on spatial scales larger than about 10-15" (corresponding to 4-6 kpc) to which PdBI is not sensitive. We find two main areas of CO emission: (i) an elongated region towards the area known as SQ B where a Tidal Dwarf Galaxy could currently be forming and (ii) a barely resolved area at the tip of the optical tidal arm. Both regions follow dust lanes visible on HST images and their CO peak coincides spatially exactly with the maximum of the Ha line emission. In SQ B, there is furthermore very good kinematical agreement between the CO, Ha and HI components. We conclude from these coincidences that the gaseous matter found in quantities in the area is physically associated to the optical tidal tail and thus that the intergalactic atomic hydrogen there was expelled from NGC 7319. Its origin had previously been much debated. Furthermore, the relatively high oxygen abundances ( about solar) estimated from the optical spectra of the H.. regions imply that the gas feeding the star formation originated from the inner regions of the parent galaxy. In SQ B, we derive from different tracers a star formation rate, corrected for dust extinction-which is important in the area-of 0.5 M-circle dot/yr, i. e. one of the highest values so far measured outside galaxies. The inferred molecular gas consumption time of 0.5 Gyr lies in the range of values found for spiral and starburst galaxies. On the other hand, the ratio of (CO)-C-12/(CO)-C-13 > 25 is much higher than the values found in disks of spiral galaxies. A relatively low opacity for the (CO)-C-12 gas is the most likely reason. C1 CSIC, Inst Astrofis Andalucia, Granada 18040, Spain. Univ Granada, Dept Fis Teor & Cosmos, Granada, Spain. Observ Bordeaux, UMR 5804, CNRS INSU, F-33270 Florac, France. CNRS, URA 2052, F-91191 Gif Sur Yvette, France. CEA DSM DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France. INAOE, Puebla 72000, Mexico. Cornell Univ, Dept Astron, Ithaca, NY 14853 USA. Observ Paris, LERMA, F-75014 Paris, France. RP Lisenfeld, U, CSIC, Inst Astrofis Andalucia, Apdo 3004, Granada 18040, Spain. NR 27 TC 5 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2004 VL 426 IS 2 BP 471 EP 479 DI 10.1051/0004-6361:20041330 PG 9 SC Astronomy & Astrophysics GA 869EI UT ISI:000224965800017 ER PT J AU Jakobsson, P Hjorth, J Fynbo, JPU Weidinger, M Gorosabel, J Ledoux, C Watson, D Bjornsson, G Gudmundsson, EH Wijers, RAMJ Moller, P Pedersen, K Sollerman, J Henden, AA Jensen, BL Gilmore, A Kilmartin, P Levan, A Ceron, JMC Castro-Tirado, AJ Fruchter, A Kouveliotou, C Masetti, N Tanvir, N TI The line-of-sight towards GRB 030429 at z=2.66: Probing the matter at stellar, galactic and intergalactic scales SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : distances and redshifts; galaxies : high-redshift; ISM : dust, extinction; quasars : absorption lines ID GAMMA-RAY BURST; HUBBLE-SPACE-TELESCOPE; UNUSUAL OPTICAL AFTERGLOW; HIGH COLUMN DENSITY; HOST GALAXY; GRB 000301C; ABSORPTION SYSTEMS; LOW-METALLICITY; JET MODEL; GRB-021004 AB We report the discovery of the optical afterglow (OA) of the long-duration gamma-ray burst GRB 030429, and present a comprehensive optical/near-infrared dataset used to probe the matter at different distance scales, i.e. in the burst environment, in the host galaxy and in an intervening absorber. A break in the afterglow light curve is seen approximately 1 day from the onset of the burst. The light curve displays a significant deviation from a simple broken power-law with a bright 1.5 mag bump with a duration of 2-3 days. The optical/near-infrared spectral energy distribution is best fit with a power-law with index beta=-0.36+/-0.12 reddened by an SMC-like extinction law with (a modest) A(V)=0.34+/-0.04. In addition, we present deep spectroscopic observations obtained with the Very Large Telescope. The redshift measured via metal absorption lines in the OA is z=2.658+/-0.004. Based on the damped Lyalpha absorption line in the OA spectrum we measure the H. column density to be log N(H I)=21.6+/-0.2. This confirms the trend that GRBs tend to be located behind very large H. column densities. The resulting dust-to-gas ratio is consistent with that found in the SMC, indicating a low metallicity and/or a low dust-to-metal ratio in the burst environment. We find that a neighbouring galaxy, at a separation of only 1."2, has z=0.841+/-0.001, ruling it out as the host of GRB 030429. The small impact parameter of this nearby galaxy, which is responsible for Mg II absorption in the OA spectrum, is in contrast to previous identifications of most QSO absorption-selected galaxy counterparts. Finally, we demonstrate that the OA was not affected by strong gravitational lensing via the nearby galaxy. C1 Univ Copenhagen, Niels Bohr Inst, Astron Observ, DK-2100 Copenhagen, Denmark. Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland. Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark. European So Observ, D-85748 Garching, Germany. CSIC, IAA, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. European So Observ, Santiago 19, Chile. Univ Amsterdam, Astron Inst, NL-1098 SJ Amsterdam, Netherlands. Stockholm Observ, Dept Astron, S-10691 Stockholm, Sweden. USRA USNO Flagstaff Stn, Flagstaff, AZ 86002 USA. Univ Canterbury, Dept Phys & Astron, Mt John Observ, Christchurch 8020, New Zealand. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. NASA MSFC, Huntsville, AL 35812 USA. CNR, Sez Bologna, Ist Astrofis Spaziale & Fis Cosm, I-40129 Bologna, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. RP Jakobsson, P, Univ Copenhagen, Niels Bohr Inst, Astron Observ, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. EM pallja@astro.ku.dk NR 88 TC 41 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2004 VL 427 IS 3 BP 785 EP 794 DI 10.1051/0004-6361:20041233 PG 10 SC Astronomy & Astrophysics GA 872HE UT ISI:000225197500005 ER PT J AU Ponce, MA Scervino, JM Erra-Balsells, R Ocampo, JA Godeas, AM TI Flavonoids from shoots, roots and roots exudates of Brassica alba SO PHYTOCHEMISTRY LA English DT Article DE Brassica alba; Cruciferae; shoots; roots; root exudates; flavonoids; flavones; chalcone; 3,5,6,7,8-pentahydroxy-4 '-methoxy flavone; 2 ',3 ',4 ',5 ',6 '-pentahydroxy chalcone; 3,5,6,7,8-pentahydroxy flavone ID ARBUSCULAR MYCORRHIZAL FUNGUS; PURE FLAVONOIDS; GROWTH; MOSSES AB Analysis of extracts obtained from shoots, roots and exudates of Brassica alba revealed the presence of 3,5,6,7,8-pentahydroxy-4'-methoxy flavone in shoots, as well as 2',3',4',5',6'-pentahydroxy chalcone and 3,5,6,7,8-pentahydroxy flavone in roots and exudates. Apigenin was also found in the shoots and roots, but not in the root exudates. (C) 2004 Published by Elsevier Ltd. C1 Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Organ, CIHIDECAR,CONICET, RA-1428 Buenos Aires, DF, Argentina. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Biodiversidad & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. RP Ponce, MA, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Organ, CIHIDECAR,CONICET, Pabellon 2,3P Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina. EM henryh@qo.fcen.uba.ar NR 16 TC 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0031-9422 J9 PHYTOCHEMISTRY JI Phytochemistry PD DEC PY 2004 VL 65 IS 23 BP 3131 EP 3134 DI 10.1016/j.phytochem.2004.08.031 PG 4 SC Biochemistry & Molecular Biology; Plant Sciences GA 877MY UT ISI:000225575900010 ER PT J AU Huelamo, N Fernandez, M Neuhauser, R Wolk, SJ TI Rotation periods of Post-T Tauri stars in Lindroos systems SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : pre-main sequence; stars : late-type; stars : rotation; X-rays : stars; stars : binaries : visual ID LOW-MASS STARS; ORION-NEBULA-CLUSTER; MAIN-SEQUENCE STARS; X-RAY-EMISSION; ANGULAR-MOMENTUM EVOLUTION; EARLY-TYPE PRIMARIES; SOLAR-TYPE STARS; YOUNG STARS; STELLAR ROTATION; ACCRETION DISKS AB We present a rotational study of Post-T Tauri stars (PTTSs) in Lindroos systems, defined as binaries with early type primaries on the main-sequence (MS) and late-type secondaries on the pre-main-sequence (PMS) phase. The importance of this study in comparison with previous ones is that the Lindroos sample is not X-ray selected so we avoid a possible bias towards fast rotators. In this preliminary study we have monitored eleven stars in the UBVRI bands during two campaigns of ten consecutive nights each. Eight of the observed PTTSs show periodic modulations in their lightcurves and the derived periods range from 1.9 d to 8.0 d. The comparison of these results with theoretical rotational tracks based on disk-star locking theory shows that star-disk decoupling times of 1-20 Myr could reproduce the rotational properties of the targets, assuming an initial rotation period of similar to8 d and a mass of 1 M-circle dot. We have studied the rotation-activity relations of Lindroos PTTSs and compared them with those found in other groups of PMS and zero-age main-sequence (ZAMS) similar to1 M-circle dot stars. The Lindroos sample displays activity-rotation relations very similar to those found in TTSs. It contains a mixture of very active stars, with L-X/L-bol ratios close to the saturation level of -3, and less active (unsaturated) stars. This could be the result of different star-disk decoupling times. Future monitoring of a larger and unbiased sample of PTTS will be important to confirm the significance of these results. C1 European So Observ, Santiago 19, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Jena, Inst Astrophys, D-07745 Jena, Germany. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Huelamo, N, European So Observ, Alonso Cordova 3107,Casilla 19001, Santiago 19, Chile. EM nhuelamo@eso.org NR 68 TC 3 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2004 VL 428 IS 3 BP 953 EP 967 DI 10.1051/0004-6361:20034442 PG 15 SC Astronomy & Astrophysics GA 877UT UT ISI:000225599800021 ER PT J AU Cid Fernandes, R Gonzalez Delgado, RM Storchi-Bergmann, T Martins, LP Schmitt, H TI The stellar populations of low-luminosity active galactic nuclei - III. Spatially resolved spectral properties SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY DT Article DE galaxies : active; galaxies : nuclei; galaxies : Seyfert; galaxies : statistics; galaxies : stellar content ID DWARF SEYFERT NUCLEI; NEARBY GALAXIES; STAR-FORMATION; EMISSION; SEARCH; STARBURST; CLUSTER; ATLAS AB In a recently completed survey of the stellar population properties of low-ionization nuclear emission-line regions (LINERs) and LINER/H II transition objects (TOs), we have identified a numerous class of galactic nuclei which stand out because of their conspicuous 10(8-9) yr populations, traced by high-order Balmer absorption lines and other stellar indices. These objects are called 'young-TOs', because they all have TO-like emission-line ratios. In this paper we extend this previous work, which concentrated on the nuclear properties, by investigating the radial variations of spectral properties in low-luminosity active galactic nuclei (LLAGNs). Our analysis is based on high signal-to-noise ratio (S/N) long-slit spectra in the 3500-5500 Angstrom interval for a sample of 47 galaxies. The data probe distances of typically up to 850 pc from the nucleus with a resolution of similar to100 pc (similar to1 arcsec) and S/N similar to 30. Stellar population gradients are mapped by the radial profiles of absorption-line equivalent widths and continuum colours along the slit. These variations are further analysed by means of a decomposition of each spectrum in terms of template galaxies representative of very young (less than or equal to10(7) yr), intermediate age (10(8-9) yr) and old (10(10) yr) stellar populations. This study reveals that young-TOs also differ from old-TOs and old-LINERs in terms of the spatial distributions of their stellar populations and dust. Specifically, our main findings are as follows. (i) Significant stellar population gradients are found almost exclusively in young-TOs. (ii) The intermediate age population of young-TOs, although heavily concentrated in the nucleus, reaches distances of up to a few hundred pc from the nucleus. Nevertheless, the half width at half-maximum of its brightness profile is more typically 100 pc or less. (iii) Objects with predominantly old stellar populations present spatially homogeneous spectra, be they LINERs or TOs. (iv) Young-TOs have much more dust in their central regions than other LLAGNs. (v) The B-band luminosities of the central less than or similar to1 Gyr population in young-TOs are within an order of magnitude of M-B=-15, implying masses of the order of similar to10(7)-10(8) M-circle dot. This population was 10-100 times more luminous in its formation epoch, at which time young massive stars would have completely outshone any active nucleus, unless the AGN too was brighter in the past. C1 Univ Fed Santa Catarina, Dept Fis, CFM, BR-88040900 Florianopolis, SC, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. Space Telescope Inst, Baltimore, MD 21218 USA. Natl Radio Astron Observ, Charlottesville, VA 22903 USA. RP Cid Fernandes, R, Univ Fed Santa Catarina, Dept Fis, CFM, CP 476, BR-88040900 Florianopolis, SC, Brazil. EM cid@astro.ufsc.br rosa@iaa.es thaisa@if.ufrgs.br martins@stsci.edu hschmitt@nrao.edu NR 23 TC 3 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JAN 1 PY 2005 VL 356 IS 1 BP 270 EP 294 DI 10.1111/j.1365-2966.2004.08452.x PG 25 SC Astronomy & Astrophysics GA 879WG UT ISI:000225749300023 ER PT J AU Solano, E Catala, C Garrido, R Poretti, E Janet-Pacheco, E Gutierrez, R Gonzalez, R Mantegazza, L Neiner, C Fremat, Y Charpinet, S Weiss, W Amado, PJ Rainer, M Tsymbal, V Lyashko, D Ballereau, D Bouret, JC Hua, T Katz, D Lignieres, F Luftinger, T Mittermayer, P Nesvacil, N Soubiran, C van't Veer-Menneret, C Goupil, MJ Costa, V Rolland, A Antonello, E Bossi, M Buzzoni, A Rodrigo, C Aerts, C Butler, CJ Guenther, E Hatzes, A TI GAUDI: A preparatory archive for the COROT mission SO ASTRONOMICAL JOURNAL DT Article DE catalogs; stars : fundamental parameters ID UVBY PHOTOMETRY; STARS BRIGHTER AB The GAUDI database (Ground-based Asteroseismology Uniform Database Interface) is a preparatory archive for the COROT ( Convection, Rotation, and Planetary Transits) mission developed at the Laboratorio de Astrofisica Espacial y Fisica Fundamental (Laboratory for Space Astrophysics and Theoretical Physics, Spain). Its intention is to make the ground-based observations obtained in preparation of the asteroseismology program available in a simple and efficient way. It contains spectroscopic and photometric data together with inferred physical parameters for more than 1500 objects gathered since 1998 January 1998 in 6 years of observational campaigns. In this paper, the main functions and characteristics of the system are described. C1 ESAC, INSA, Lab AStrofis Espacial & Fis Fondamental, E-28080 Madrid, Spain. Observ Paris, CNRS, UMR 8109, Lab Etud Spaitales & Instrumentat & Astrophys, F-92195 Meudon, France. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INAF, Osservatorio Astron Brera, I-23807 Merate, Italy. Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508 Sao Paulo, Brazil. ESAC, INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. ESA, ESAC, XMM Newton Sci Operat Ctr, E-28080 Madrid, Spain. ESA, ESTEC, Res & Sci Support Dept, Noordwijk, Netherlands. Observ Paris, CNRS, UMR 8111, Paris, France. CNRS, UMR 5572, Lab Astrophys Toulouse Tarbes, F-75700 Paris, France. Tavricheskii Natsionalnyi Univ, Fizicheskiy Fak, UA-95007 Simferopol, Ukraine. Observ Astron Marseille Prov, Marseille, France. Observ Bordeaux, F-33270 Florac, France. Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy. Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium. Armagh Observ, Armagh BT61 9DG, North Ireland. Thuringer Landessternwarte tautenberg, D-07778 Tautenberg, Germany. RP Solano, E, ESAC, INSA, Lab AStrofis Espacial & Fis Fondamental, Apdo 50727, E-28080 Madrid, Spain. NR 13 TC 8 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD JAN PY 2005 VL 129 IS 1 BP 547 EP 553 PG 7 SC Astronomy & Astrophysics GA 885BK UT ISI:000226130800042 ER PT J AU Mieske, S Infante, L Hilker, M Hertling, G Blakeslee, JP Benitez, N Ford, H Zekser, K TI Discovery of two M 32 twins in Abell 1689 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : clusters : individual : Abell 1689; galaxies : dwarf; galaxies : structure; galaxies : interactions ID COMPACT DWARF GALAXIES; MASSIVE STAR-CLUSTERS; FORNAX CLUSTER; ELLIPTICAL GALAXIES; SURFACE BRIGHTNESS; STELLAR-SYSTEMS; CENTRAL REGION; ORIGIN; PHOTOMETRY; HST AB The M 31 satellite galaxy M 32 has long been considered an object of unique properties, being the most extreme example of the very rare compact elliptical galaxy class. Here we present the spectroscopic discovery of two M 32 twins in the massive galaxy cluster Abell 1689. As these objects are so rare, this is an important step towards a better understanding of the nature of compact galaxies. The two M 32 twins had first been detected within our photometric search for ultra compact dwarf galaxy (UCDs) candidates in A1689 (Mieske et al. 2004b, AJ, 128, 1529) with the Advanced Camera for Surveys (ACS). Their luminosities (M-V similar or equal to - 17 mag) are very similar to M 32 and their surface brightness profiles are consistent with that of M 32 projected to A1689' s distance. From our ACS imaging we detect several fainter compact galaxy candidates with luminosities intermediate between M 32 and the Fornax UCDs. If spectroscopically confirmed as cluster members, this would almost close the gap in the mag-mu plane between the region of UCDs and the compact ellipticals, implying a sequence of faint compact galaxies well separated from that of dwarf ellipticals. C1 Univ Sternwarte, D-53121 Bonn, Germany. Pontificia Univ Catolica Chile, Dept Astron & Astrophys, Santiago 22, Chile. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, Granada 18008, Spain. RP Mieske, S, Univ Sternwarte, Auf Hugel 71, D-53121 Bonn, Germany. EM smieske@astro.uni-bonn.de NR 26 TC 9 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 2005 VL 430 IS 2 BP L25 EP L28 DI 10.1051/0004-6361:200400119 PG 4 SC Astronomy & Astrophysics GA 889TE UT ISI:000226464700002 ER PT J AU Bueno, E Gomez-Hernandez, N Girard, L Bedmar, EJ Delgado, MJ TI Function of the Rhizobium etli CFN42 nirK gene in nitrite metabolism SO BIOCHEMICAL SOCIETY TRANSACTIONS LA English DT Article DE anaerobiosis; denitrification; detoxification; nitrite reduction; respiratory nitrite reductase; Rhizobium etli ID BRADYRHIZOBIUM-JAPONICUM; SYMBIOTIC PLASMID; REDUCTASE; PHASEOLI; NITRATE AB Rhizobium etli CFN42 is not capable of growing anaerobically with nitrate but it grows with nitrite as a terminal electron acceptor. This bacterium contains the nirK gene encoding the copper-containing Nir (nitrite reductase), which is located on the cryptic plasmid pCFN42f. Mutational analysis has demonstrated that a nirK deficient mutant was not capable of growing under nitrite-respiring conditions. Moreover, microaerobic growth of this mutant was inhibited by the presence of nitrite. Nir activity and nitrite uptake were highly diminished in a nirK mutant, compared with the wild-type levels after incubation under anaerobic conditions. our results suggest that the copper-containing Nir may have both a respiratory and a nitrite-detoxifying role in R. etli. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, Granada 18080, Spain. UNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca 62271, Morelos, Mexico. RP Delgado, MJ, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, POB 419, Granada 18080, Spain. EM mdelgado@eez.csic.es NR 14 TC 0 PU PORTLAND PRESS LTD PI LONDON PA 59 PORTLAND PLACE, LONDON W1B 1QW, ENGLAND SN 0300-5127 J9 BIOCHEM SOC TRANS JI Biochem. Soc. Trans. PD FEB PY 2005 VL 33 PN Part 1 BP 162 EP 163 PG 2 SC Biochemistry & Molecular Biology GA 901GA UT ISI:000227269800047 ER PT J AU Menanteau, F Martel, AR Tozzi, P Frye, B Ford, HC Infante, L Benitez, N Galaz, G Coe, D Illingworth, GD Hartig, GF Clampin, M TI The nature of blue cores in spheroids: A possible connection with active galactic nuclei and star formation SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : elliptical and lenticular, cD; X-rays : galaxies ID HUBBLE-DEEP-FIELD; FORMATION RATE INDICATOR; 2-10 KEV LUMINOSITY; EARLY-TYPE GALAXIES; SIMILAR-TO 0.7; FORMING GALAXIES; SEQUENCE; SOUTH; EVOLUTION; EMISSION AB We investigate the physical nature of blue cores in early-type galaxies through the first multiwavelength analysis of a serendipitously discovered field blue-nucleated spheroid in the background of the deep Hubble Space Telescope ACS/WFC griz multicolor observations of the cluster A1689. The resolved g - r, r - i, and i - z color maps reveal a prominent blue core identifying this galaxy as a "typical'' case study, exhibiting variations of 0.5 - 1.0 mag in color between the center and the outer regions, opposite to the expectations of reddened metallicity- induced gradients in passively evolved elliptical galaxies. From a Magellan-Clay telescope spectrum we secure the galaxy redshift at z = 0.624. We find a strong X-ray source coincident with the spheroid galaxy. Spectral features and a high X-ray luminosity indicate the presence of an active galactic nucleus (AGN) in the galaxy. However, a comparison of the X-ray luminosity to a sample derived from the Chandra Deep Field - South displays L-X to be comparable to type 1/QSO galaxies while the optical flux is consistent with a normal star-forming galaxy. We conclude that the galaxy's nonthermal component dominates at high-energy wavelengths, while we associate the spheroid blue light with the stellar spectrum of normal star-forming galaxies. We argue for a probable association between the presence of blue cores in spheroids and AGN activity. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771 USA. RP Menanteau, F, Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. NR 27 TC 12 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 2005 VL 620 IS 2 PN Part 1 BP 697 EP 702 PG 6 SC Astronomy & Astrophysics GA 903DN UT ISI:000227405800012 ER PT J AU Broadhurst, T Benitez, N Coe, D Sharon, K Zekser, K White, R Ford, H Bouwens, R Blakeslee, J Clampin, M Cross, N Franx, M Frye, B Hartig, G Illingworth, G Infante, L Menanteau, F Meurer, G Postman, M Ardila, DR Bartko, F Brown, RA Burrows, CJ Cheng, ES Feldman, PD Golimowski, DA Goto, T Gronwall, C Herranz, D Holden, B Homeier, N Krist, JE Lesser, MP Martel, AR Miley, GK Rosati, P Sirianni, M Sparks, WB Steindling, S Tran, HD Tsvetanov, ZI Zheng, W TI Strong-lensing analysis of A1689 from deep Advanced Camera images SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmological parameters; galaxies : clusters : individual (A1683); gravitational lensing ID HUBBLE-SPACE-TELESCOPE; DARK-MATTER HALOS; X-RAY; MASS-DISTRIBUTION; BACKGROUND GALAXIES; DENSITY PROFILES; INNER STRUCTURE; CLUSTER SURVEY; RICH CLUSTERS; HIGH-REDSHIFT AB We analyze deep multicolor Advanced Camera images of the largest known gravitational lens, A1689. Radial and tangential arcs delineate the critical curves in unprecedented detail, and many small counterimages are found near the center of mass. We construct a flexible light deflection field to predict the appearance and positions of counterimages. The model is refined as new counterimages are identified and incorporated to improve the model, yielding a total of 106 images of 30 multiply lensed background galaxies, spanning a wide redshift range, 1.0 < z < 5.5. The resulting mass map is more circular in projection than the clumpy distribution of cluster galaxies, and the light is more concentrated than the mass within r < 50 kpc h(-1). The projected mass profile flattens steadily toward the center with a shallow mean slope of dlog &USigma;/dlog r &SIME; -0.55 &PLUSMN; 0.1, over the observed range r < 250 kpc h(-1), matching well an NFW profile, but with a relatively high concentration, C-vir = 8.2(1.8)(+2.1). A softened isothermal profile (r(core) = 20 +/- 2") is not conclusively excluded, illustrating that lensing constrains only projected quantities. Regarding cosmology, we clearly detect the purely geometric increase of bend angles with redshift. The dependence on the cosmological parameters is weak owing to the proximity of A1689, z = 0.18, constraining the locus, Omega(M) + Omega(Lambda) less than or equal to 1.2. This consistency with standard cosmology provides independent support for our model, because the redshift information is not required to derive an accurate mass map. Similarly, the relative fluxes of the multiple images are reproduced well by our best-fitting lens model. C1 Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Conceptual Anal LLC, Glenn Dale, MD 20769 USA. Princeton Univ, Princeton, NJ 08544 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. Bartko Sci & Technol, Brighton, CO 80602 USA. Leiden Observ, NL-2300 RA Leiden, Netherlands. Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA. Ist Sci & Tecnol Informaz Alessandro Faedo, I-56124 Pisa, Italy. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. European So Observ, D-85748 Garching, Germany. WM Keck Observ, Kamuela, HI 96743 USA. RP Broadhurst, T, Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. EM tjb@wise3.tau.ac.il NR 81 TC 64 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 2005 VL 621 IS 1 PN Part 1 BP 53 EP 88 PG 36 SC Astronomy & Astrophysics GA 903DR UT ISI:000227406200006 ER PT J AU Pereira, CB Miranda, LF TI The identification of PM1-322 as a new young high-density planetary nebulae SO ASTRONOMY & ASTROPHYSICS DT Article DE planetary nebulae : individual : PM1-322 ID SYMBIOTIC STARS; SPECTROSCOPIC OBSERVATIONS; ELEMENTAL ABUNDANCES; GASEOUS NEBULAE; RADIATION; SPECTRUM AB We report spectroscopic observations of a new planetary nebula PM1-322, which has not yet been identified. This object was found during a northern survey of post-AGB and planetary nebulae candidates selected from Garcia-Lario et al. ( 1997, AWAS, 126, 479) and Preite-Martinez ( 1988, AWAS, 76, 317). Here we present the main spectroscopic features including a list of the intensities of the identified emission lines. The main spectral characteristic of PM1-322 is the presence of a very strong [O III] lambda 4363 emission line (I[OIII] 4363/H beta similar or equal to 120) indicating high electron densities ( log N-e > 6.0). A comparison with similar objects strongly suggests that PM1-322 is a very young planetary nebula, although the posibility of a symbiotic nature can not be ruled out. C1 Observ Nacl MCT, BR-20921400 Rio De Janeiro, RJ, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Pereira, CB, Observ Nacl MCT, Rua Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil. EM claudio@on.br NR 24 TC 1 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2005 VL 433 IS 2 BP 579 EP 582 DI 10.1051/0004-6361:20042218 PG 4 SC Astronomy & Astrophysics GA 909JS UT ISI:000227856800025 ER PT J AU Araujo-Santos, JM Parodi-Talice, A Castanys, S Gamarro, F TI The overexpression of an intracellular ABCA-like transporter alters phospholipid trafficking in Leishmania SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article DE ABC transporter; ABCA subfamily; phospholipid trafficking; exocytic activity; infectivity; parasites; Leishmania ID MULTIDRUG-RESISTANCE; TRYPANOSOMA-CRUZI; SECRETORY PATHWAY; PROTEIN; PROTOZOAN; MEMBRANE; DRUG; HEXADECYLPHOSPHOCHOLINE; CHEMOSENSITIZATION; ENGULFMENT AB In parasites, ATP-binding cassette (ABC) transporters represent an important family of proteins related to drug resistance and other biological activities. Here we report the characterization of LtrABCA2, a new ABC transporter of the ABCA subfamily in the protozoan parasite Leishmania tropica, localized at the flagellar pocket region and in internal vesicles. The overexpression of this transporter reduced the accumulation of fluorescent glycerophospholipid analogs, increased the exocytic activity, and decreased infectivity of macrophage, but did not confer resistance to drugs. Together, these results suggest that this new ABC transporter plays a role in phospholipid trafficking, which may be modifying the vesicular trafficking and the infectivity of the parasite. (c) 2005 Elsevier Inc. All rights reserved. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Parque Tecnol Ciencias Salud, Granada, Spain. Univ Republica, Fac Ciencias, Secc Genet, Montevideo, Uruguay. RP Gamarro, F, CSIC, Inst Parasitol & Biomed Lopez Neyra, Parque Tecnol Ciencias Salud, Avda Conocimiento S-N 18100 Armilla, Granada, Spain. EM gamarro@ipb.csic.es NR 35 TC 6 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0006-291X J9 BIOCHEM BIOPHYS RES COMMUN JI Biochem. Biophys. Res. Commun. PD APR 29 PY 2005 VL 330 IS 1 BP 349 EP 355 DI 10.1016/j.bbrc.2005.02.176 PG 7 SC Biochemistry & Molecular Biology; Biophysics GA 914UP UT ISI:000228253700049 ER PT J AU Torrelles, JM Patel, N Gomez, JF Anglada, G Uscanga, L TI VLBI water maser proper motion measurements in star-forming regions SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE ISM : jets and outflows; masers-stars : formation ID YOUNG STELLAR OBJECTS; CEPHEUS-A; H2O MASERS; BIPOLAR OUTFLOW; EXCITING SOURCE; MASSIVE STARS; JET; EMISSION; DISK; W75N AB We review some of the recent water maser proper motion measurements in star-forming regions performed through VLBI multi-epoch observations. These observations are starting to reveal exciting perspectives, providing the full kinematics of the gas within the outflows/circumstellar disks around YSOs at scales of AUs, discovering new phenomena (e.g., isotropic mass ejections, water maser "micro-structures" exhibiting remarkable coherent and well ordered spatio-kinematical behavior at AU scale), and opening new, puzzling questions related to the early stellar evolution. C1 IEEC, CSIC, Inst Ciencias Espacio, Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, England. INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid, Spain. CSIC, Inst Astrophys Andalucia, Granada, Spain. UNAM, Astron Inst, Mexico City, DF, Mexico. RP Torrelles, JM, IEEC, CSIC, Inst Ciencias Espacio, C-Gran Capita 2-4, Barcelona, Spain. EM torrelles@ieec.fcr.es NR 52 TC 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 2005 VL 295 IS 1-2 BP 53 EP 63 PG 11 SC Astronomy & Astrophysics GA 916MG UT ISI:000228389200007 ER PT J AU Postman, M Franx, M Cross, NJG Holden, B Ford, HC Illingworth, GD Goto, T Demarco, R Rosati, P Blakeslee, JP Tran, KV Benitez, N Clampin, M Hartig, GF Homeier, N Ardila, DR Bartko, F Bouwens, RJ Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Feldman, PD Golimowski, DA Gronwall, C Infante, L Kimble, RA Krist, JE Lesser, MP Martel, AR Mei, S Menanteau, F Meurer, GR Miley, GK Motta, V Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W TI The morphology-density relation in z similar to 1 clusters SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : general; galaxies : evolution; galaxies : formation; galaxies : structure ID HUBBLE-SPACE-TELESCOPE; HIGH-REDSHIFT CLUSTERS; COLOR-MAGNITUDE RELATION; STAR-FORMATION RATE; X-RAY; GALAXY CLUSTER; DISK GALAXIES; ADVANCED CAMERA; RICH CLUSTERS; S0 GALAXIES AB We measure the morphology-density relation (MDR) and morphology-radius relation (MRR) for galaxies in seven z similar to 1 clusters that have been observed with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope. Simulations and independent comparisons of our visually derived morphologies indicate that ACS allows one to distinguish between E, S0, and spiral morphologies down to z(850) = 24, corresponding to L/L* 0.21 and 0.30 at z = 0.83 and 1.24, respectively. We adopt density and radius estimation methods that match those used at lower redshift in order to study the evolution of the MDR and MRR. We detect a change in the MDR between 0: 8 < z < 1.2 and that observed at z similar to 0, consistent with recent work; specifically, the growth in the bulge-dominated galaxy fraction, f(E+S0), with increasing density proceeds less rapidly at z similar to 1 than it does at z similar to 0. At z similar to 1 and Sigma >= 500 galaxies Mpc(-2), we find < f(E+S0)> = 0.72 +/- 0.10. At z similar to 0, an E + S0 population fraction of this magnitude occurs at densities about 5 times smaller. The evolution in the MDR is confined to densities Sigma greater than or similar to 40 galaxies Mpc(-2) and appears to be primarily due to a deficit of S0 galaxies and an excess of Sp+Irr galaxies relative to the local galaxy population. The f(E)-density relation exhibits no significant evolution between z = 1 and 0. We find mild evidence to suggest that the MDR is dependent on the bolometric X-ray luminosity of the intracluster medium. Implications for the evolution of the disk galaxy population in dense regions are discussed in the context of these observations. C1 Space Telescope Sci Inst, Baltimore, MD 21218 USA. Leiden Observ, NL-2300 RA Leiden, Netherlands. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. European So Observ, D-85748 Garching, Germany. ETH, Inst Astron, CH-8093 Zurich, Switzerland. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Bartko Sci & Technol, Brighton, CO 80602 USA. Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. MetaJiva Sci, Edmonds, WA 98026 USA. Conceptual Analyt LLC, Glenn Dale, MD 20769 USA. Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. WM Keck Observ, Kamuela, HI 96743 USA. RP Postman, M, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA. NR 87 TC 67 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 20 PY 2005 VL 623 IS 2 PN Part 1 BP 721 EP 741 PG 21 SC Astronomy & Astrophysics GA 917GU UT ISI:000228445500010 ER PT J AU Garcia, J Stock, J Stock, MJ Sanchez, N TI Quantitative stellar spectral classification. III. Spectral resolution SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE stars : fundamental parameters, classification ID STARS AB The method developed by Stock & Stock (1999) to derive absolute magnitudes and intrinsic colors is applied to simulated low-resolution spectra. The simulation is made by convolving real spectra with a Gaussian function, with sigma (the full width at half maximum) related to the final spectral resolution. The accuracy with which the stellar parameters are determined indicates that the method may be applied to typical objective-prism spectra. We show that changes in the spectral resolution do not significantly affect the stellar parameters obtained with this method for early-type stars, whereas for later-type stars an improved approach is necessary. C1 Univ Zulia, Fac Ciencias Expt, Lab Invest Astron, Dept Fis, Maracaibo 4011, Venezuela. CIDA, Merida 5101A, Venezuela. Univ Los Andes, Fac Ciencias, Los Andes, Venezuela. CSIC, Inst Astrofis Andalucia, Madrid, Spain. RP Garcia, J, Univ Zulia, Fac Ciencias Expt, Lab Invest Astron, Dept Fis, Apartado 15439, Maracaibo 4011, Venezuela. EM jgarcia@cida.ve mjstock@cida.ve-nestor mjstock@cida.ve nestor@luz.ve NR 5 TC 1 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD APR PY 2005 VL 41 IS 1 BP 31 EP 40 PG 10 SC Astronomy & Astrophysics GA 920QU UT ISI:000228706000004 ER PT J AU D'Alessio, P Merin, B Calvet, N Hartmann, L Montesinos, B TI Www database of models of accretion disks irradiated by the central star SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE accretion disks; astronomical data bases; stars : pre-main sequence ID T-TAURI STARS; SPECTRAL ENERGY-DISTRIBUTIONS; YOUNG STELLAR OBJECTS; EMISSION-LINE DIAGNOSTICS; INTERMEDIATE-MASS STARS; VERTICAL STRUCTURE; MAGNETOSPHERIC ACCRETION; CIRCUMSTELLAR DISKS; PROTOPLANETARY DISK; DM-TAU AB We announce the release of a catalog of physical models of irradiated accretion disks around young stars based on the modelling techniques by D'Alessio et al. The WWW catalog includes similar to 3000 disk models for different central stars, disk sizes, inclinations, dust contents and mass accretion rates. For any of them, radial profiles of disk physical parameters and synthetic spectral energy distributions can be browsed and downloaded to compare with observations. The catalog can be accessed at http://cfa-www.harvard.edu/youngstars/dalessio/ US), http: //www. astrosmo. unam. mx/similar to dalessio/ (Mexico), and at http: // www.laeff.esa.es/models/dalessio/ (Spain). C1 Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. UNAM, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, Mexico. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. RP D'Alessio, P, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. EM p.dalessio@astrosmo.unam.mx merin@strw.leidenuniv.nl ncalvet@cfa.harvard.edu hartmann@cfa.harvard.edu bmm@laeff.esa.es NR 58 TC 15 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD APR PY 2005 VL 41 IS 1 BP 61 EP 67 PG 7 SC Astronomy & Astrophysics GA 920QU UT ISI:000228706000008 ER PT J AU Garcia-Rissmann, A Vega, LR Asari, NV Fernandes, RC Schmitt, H Delgado, RMG Storchi-Bergmann, T TI An atlas of calcium triplet spectra of active galaxies SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY DT Article DE galaxies : active; galaxies : kinematics and dynamics; galaxies : Seyfert galaxies : statistics; galaxies : stellar content ID INFRARED CAII TRIPLET; BLACK-HOLE MASS; STELLAR POPULATION SYNTHESIS; SEYFERT 2 GALAXIES; EMPIRICAL CALIBRATION; VELOCITY DISPERSION; GALACTIC NUCLEI; SPECTROPHOTOMETRIC STANDARDS; GASEOUS KINEMATICS; LINE REGION AB We present a spectroscopic atlas of active galactic nuclei covering the region around the lambda lambda 8498, 8542, 8662 calcium triplet (CaT). The sample comprises 78 objects, divided into 43 Seyfert 2s, 26 Seyfert 1s, three starburst and six normal galaxies. The spectra pertain to the inner similar to 300 pc in radius, and thus sample the central kinematics and stellar populations of active galaxies. The data are used to measure stellar velocity dispersions (sigma(star)) with both cross-correlation and direct fitting methods. These measurements are found to be in good agreement with each other and with those in previous studies for objects in common. The CaT equivalent width is also measured. We find average values and sample dispersions of W-CaT of 4.6 +/- 2.0, 7.0 +/- 1.0 and 7.7 +/- 1.0 angstrom for Seyfert 1s, Seyfert 2s and normal galaxies, respectively. We further present an atlas of [S III]lambda 9069 emission-line profiles for a subset of 40 galaxies. These data are analysed in a companion paper which addresses the connection between stellar and narrow-line region kinematics, the behaviour of the CaT equivalent width as a function of sigma(star), activity type and stellar population properties. C1 Univ Fed Santa Catarina, CFM, Dept Fis, BR-88040900 Florianopolis, SC, Brazil. Observ Astron, RA-5000 Cordoba, Argentina. USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA. Interferometr Inc, Chantilly, VA USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. RP Garcia-Rissmann, A, Univ Fed Santa Catarina, CFM, Dept Fis, CP 476, BR-88040900 Florianopolis, SC, Brazil. EM aurea@astro.ufsc.br luis@astro.ufsc.br natalia@astro.ufsc.br cid@astro.ufsc.br hschmitt@css.nrl.navy.mil rosa@iaa.es thaisa@if.ufrgs.br NR 54 TC 13 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAY 11 PY 2005 VL 359 IS 2 BP 765 EP 780 DI 10.1111/j.1365-2966.2005.08957.x PG 16 SC Astronomy & Astrophysics GA 921DY UT ISI:000228745600039 ER PT J AU Hannikainen, DC Rodriguez, J Vilhu, O Hjalmarsdotter, L Zdziarski, AA Belloni, T Poutanen, J Wu, K Shaw, SE Beckmann, V Hunstead, RW Pooley, GG Westergaard, NJ Mirabel, IF Hakala, P Castro-Tirado, A Durouchoux, P TI Characterizing a new class of variability in GRS 1915+105 with simultaneous INTEGRAL/RXTE observations SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE X-rays : binaries; X-rays : stars; X-rays : individual : GRS 1915+105; gamma rays : observations; black hole physics ID BLACK-HOLE CANDIDATES; GRS 1915+105; MICROQUASAR GRS-1915+105; RELATIVISTIC EJECTIONS; RXTE OBSERVATIONS; SPECTRAL STATES; ACCRETION DISK; CYGNUS X-1; MODEL; COMPTONIZATION AB We report on the analysis of 100 ks INTEGRAL observations of the Galactic microquasar GRS 1915+105. We focus on INTEGRAL Revolution number 48 when the source was found to exhibit a new type of variability as preliminarily reported in Hannikainen ( 2003, A&A, 411, L415). The variability pattern, which we name., is characterized by a pulsing behaviour, consisting of a main pulse and a shorter, softer, and smaller amplitude precursor pulse, on a timescale of 5 min in the JEM-X 3-35 keV lightcurve. We also present simultaneous RXTE data. From a study of the individual RXTE/PCA pulse profiles we find that the rising phase is shorter and harder than the declining phase, which is opposite to what has been observed in other otherwise similar variability classes in this source. The position in the colour-colour diagram throughout the revolution corresponds to State A (Belloni et al. 2000, A&A, 355, 271) but not to any previously known variability class. We separated the INTEGRAL data into two subsets covering the maxima and minima of the pulses and fitted the resulting two broadband spectra with a hybrid thermal-non-thermal Comptonization model. The fits show the source to be in a soft state characterized by a strong disc component below &SIM; 6 keV and Comptonization by both thermal and non-thermal electrons at higher energies. C1 Univ Helsinki Observ, Helsinki 00014, Finland. CEA, DAPNIA, Serv Astrophys, CNRS FRE 2591, F-91191 Gif Sur Yvette, France. INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland. Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland. INAF, Osserv Astron Brera, I-23807 Merate, LC, Italy. Oulu Univ, Astron Div, Oulu 90014, Finland. Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England. Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Maryland Baltimore Cty, Dept Phys, Joint Ctr Astrophys, Baltimore, MD 21250 USA. Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia. Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England. Danish Space Res Inst, DK-2100 Copenhagen, Denmark. European So Observ, Santiago 10, Chile. Inst Astrofis Andalucia, IAA, CSIC, Granada 18080, Spain. RP Hannikainen, DC, Univ Helsinki Observ, POB 14, Helsinki 00014, Finland. EM diana@astro.helsinki.fi NR 50 TC 7 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2005 VL 435 IS 3 BP 995 EP 1004 DI 10.1051/0004-6361:20042250 PG 10 SC Astronomy & Astrophysics GA 926GU UT ISI:000229112100020 ER PT J AU Nielsen, K Gall, D Smith, P Balsevicius, S Garrido, F Ferrer, MD Biancifiori, F Dajer, A Luna, E Samartino, L Bermudez, R Moreno, F Renteria, T Corral, A TI Comparison of serological tests for the detection of ovine and caprine antibody to Brucella melitensis SO REVUE SCIENTIFIQUE ET TECHNIQUE-OFFICE INTERNATIONAL DES EPIZOOTIES LA English DT Article DE brucellosis; conventional test; diagnosis; goat; primary binding assay; sheep ID FLUORESCENCE POLARIZATION ASSAY; DIAGNOSIS; ABORTUS AB The indirect enzyme-linked immunosorbent assay (IELISA), the competitive enzyme-linked immunosorbent assay (CELISA) and the fluorescence polarisation assay (FPA) were evaluated with sera from sheep experimentally infected with Brucella melitensis and negative Canadian sheep. The sensitivity and specificity of the assays were as follows: IELISA: 91.7% and 97.6%, CELISA: 75.0% and 99.8% and FPA: 91.7% and 89.5%. Sera from the same experimental population were divided according to serological reaction in the rose bengal agglutination test (RBT) and the complement fixation test (CFT). Reactivity relative to the RBT positive and CFT positive sera were as follows: IELISA: 99.7%, CELISA: 93.2% and FPA: 99.1%. Since sera from goats with proven B. melitensis infection were not available, 699 sera from goats judged positive in the buffered antigen plate agglutination test (BPAT) and CFT and 982 BPAT/CFT negative Canadian goats were used. The sensitivity and specificity of the assays relative to the BPAT and CFT positive sera were: IELISA: 99.4% and 98.0%, CELISA: 95.4% and 97.1% and FPA: 92.7% and 99.8%. C1 Canadian Food Inspect Agcy, Anim Dis Res Inst, Nepean, ON K2H 8P9, Canada. Lab Nacl Sanidad & Prod Anim, E-18320 Granada, Spain. Ist Zooprofilatt Sperimentale Umbria & Marche, I-06126 Perugia, Italy. Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Merida, Yucatan, Mexico. Comis Nacl Sanidad Agropecuria, Coyoacan, DF Mexico, Mexico. Inst Pathobiol, INTA, CICV, RA-1708 Buenos Aires, DF, Argentina. Univ Autonoma Baja California, IICV, Unidad Lab Diagnost, Mexico City, DF, Mexico. RP Nielsen, K, Canadian Food Inspect Agcy, Anim Dis Res Inst, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada. NR 14 TC 3 PU OFFICE INT EPIZOOTIES PI PARIS PA 12 RUE DE PRONY, 75017 PARIS, FRANCE SN 0253-1933 J9 REV SCI TECH OIE JI Rev. Sci. Tech. Off. Int. Epizoot. PD DEC PY 2004 VL 23 IS 3 BP 979 EP 987 PG 9 SC Veterinary Sciences GA 926JJ UT ISI:000229119200026 ER PT J AU Lorente, SO Gomez, R Jimenez, C Cammerer, S Yardley, V de Luca-Fradley, K Croft, SL Perez, LMR Urbina, J Pacanowska, DG Gilbert, IH TI Biphenylquinuclidines as inhibitors of squalene synthase and growth of parasitic protozoa SO BIOORGANIC & MEDICINAL CHEMISTRY LA English DT Article ID TRYPANOSOMA SCHIZOTRYPANUM CRUZI; METHYL TRANSFERASE INHIBITORS; ERGOSTEROL BIOSYNTHESIS INHIBITORS; DRUG-RESISTANT STRAINS; BIS-TRIAZOLE D0870; ULTRASTRUCTURAL ALTERATIONS; IN-VITRO; LEISHMANIA-DONOVANI; STEROL COMPOSITION; PLASMA-MEMBRANES AB In this paper we describe the preparation of some biphenylquinuclidine derivatives and their evaluation as inhibitors of squalene synthase in order to explore their potential in the treatment of the parasitic diseases leishmaniasis and Chagas disease. The compounds were screened against recombinant Leishmania major squalene synthase and against Leishmania mexicana promastigotes, Leishmania donovani intracellular amastigotes and Trypanosoma cruzi intracellular amastigotes. Compounds that inhibited the enzyme, also reduced the levels of steroids and caused growth inhibition of L. mexicana promastigotes. However there was a lower correlation between inhibition of the enzyme and growth inhibition of the intracellular parasites, possibly due to delivery problems. Some compounds also showed growth inhibition of T brucei rhodesiense trypomastigotes, although in this case alternative modes of action other than inhibition of SQS are probably involved. © 2005 Elsevier Ltd. All rights reserved. C1 Univ Cardiff Wales, Welsh Sch Pharm, Cardiff CF10 3XF, Wales. Inst Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Med, London WC1E 7HT, England. Inst Venezolano Invest Cient, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020, Venezuela. RP Gilbert, IH, Univ Cardiff Wales, Welsh Sch Pharm, Redwood Bldg,King Edward 7 Ave, Cardiff CF10 3XF, Wales. EM gilbertih@cf.ac.uk NR 34 TC 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0968-0896 J9 BIOORGAN MED CHEM JI Bioorg. Med. Chem. PD MAY 16 PY 2005 VL 13 IS 10 BP 3519 EP 3529 DI 10.1016/j.bmc.2005.02.060 PG 11 SC Biochemistry & Molecular Biology; Chemistry, Medicinal; Chemistry, Organic GA 926PW UT ISI:000229136100022 ER PT J AU Sanchez, N Alfaro, EJ Perez, E TI The fractal dimension of projected clouds SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : clouds; ISM : general; ISM : structure ID INTERSTELLAR-MEDIUM; MOLECULAR CLOUDS; MASS-SPECTRUM; TURBULENCE; DENSITY; OBJECTS; ORIGIN AB The interstellar medium seems to have an underlying fractal structure, which can be characterized through its fractal dimension. However, interstellar clouds are observed as projected two-dimensional images, and the projection of a three-dimensional fractal distorts its measured properties. Here we use simulated fractal clouds to study the relationship between the three-dimensional fractal dimension (D-f) of modeled clouds and the dimension resulting from their projected images. We analyze different fractal dimension estimators: the correlation and mass dimensions of the clouds and the perimeter-based dimension of their boundaries (D-per). We find the functional forms relating Df with the projected fractal dimensions, as well as their dependence on the image resolution, which allow us to estimate the "real'' Df value of a cloud from its projection. The application of these results to Orion A indicates in a self-consistent way that 2.5 less than or similar to D-f less than or similar to 2.7 for this molecular cloud, a value higher than the result D-per + 1 similar or equal to 2.3 sometimes assumed in the literature for interstellar clouds. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Zulia, Dept Fis, Maracaibo 4011, Venezuela. RP Sanchez, N, CSIC, Inst Astrofis Andalucia, Apdo Correaos 3004, E-18080 Granada, Spain. EM nestor@iaa.es emilio@iaa.es eperez@iaa.es NR 36 TC 12 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 1 PY 2005 VL 625 IS 2 PN Part 1 BP 849 EP 856 PG 8 SC Astronomy & Astrophysics GA 930SJ UT ISI:000229436900024 ER PT J AU Holden, BP Blakeslee, JP Postman, M Illingworth, GD Demarco, R Franx, M Rosati, P Bouwens, RJ Martel, AR Ford, H Clampin, M Hartig, GF Benitez, N Cross, NJG Homeier, N Lidman, C Menanteau, F Zirm, A Ardila, DR Bartko, F Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Feldman, PD Golimowski, DA Goto, T Gronwall, C Infante, L Kimble, RA Krist, JE Lesser, MP Magee, D Mei, S Meurer, GR Miley, GK Motta, V Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W TI Evolution in the cluster early-type galaxy size-surface brightness relation at z similar or equal to 1 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : general; galaxies : clusters : individual (RDCS J1252.9-2927, RX J1052.7-1357); galaxies : elliptical and lenticular, cD; galaxies : evolution; galaxies : fundamental parameters; galaxies : photometry ID COLOR-MAGNITUDE RELATION; HIGH-REDSHIFT CLUSTERS; DIGITAL SKY SURVEY; FUNDAMENTAL PLANE; DISTANT CLUSTERS; CL 1358+62; LUMINOSITY EVOLUTION; SPECTROSCOPIC SURVEY; ELLIPTIC GALAXIES; ADVANCED CAMERA AB We investigate the evolution in the distribution of surface brightness, as a function of size, for elliptical and S0 galaxies in the two clusters RDCS J1252.9 - 2927 ( z = 1: 237) and RX J0152.7 - 1357 ( z = 0: 837). We use multicolor imaging with the Advanced Camera for Surveys on the Hubble Space Telescope to determine these sizes and surface brightnesses. Using three different estimates of the surface brightnesses, we find that we reliably estimate the surface brightness for the galaxies in our sample with a scatter of < 0.2 mag and with systematic shifts of <= 0.05 mag. We construct samples of galaxies with early- type morphologies in both clusters. For each cluster, we use a magnitude limit in a band that closely corresponds to the rest- frame B, to magnitude limit of M-B = - 18: 8 at z = 0, and select only those galaxies within the color- magnitude sequence of the cluster or by using our spectroscopic redshifts. We measure evolution in the rest- frame B surface brightness and find - 1: 41 +/- 0: 14 mag from the Coma Cluster of galaxies for RDCS J1252.9 - 2927 and - 0: 90 +/- 0: 12 mag of evolution for RX J0152.7 - 1357, or an average evolution of ( - 1: 13 +/- 0: 15) z mag. Our statistical errors are dominated by the observed scatter in the size - surface brightness relation, sigma = 0: 42 +/- 0: 05 mag for RX J0152.7 - 1357 and sigma = 0: 76 +/- 0: 10 mag for RDCS J1252.9 - 2927. We find no statistically significant evolution in this scatter, although an increase in the scatter could be expected. Overall, the pace of luminosity evolution we measure agrees with that of the fundamental plane of early- type galaxies, implying that the majority of massive early- type galaxies observed at z similar or equal to 1 formed at high redshifts. C1 Univ Calif Santa Cruz, UCO, Lick Observ, Dept Astron, Santa Cruz, CA 95064 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Leiden Observ, NL-2300 RA Leiden, Netherlands. European So Observ, D-85748 Garching, Germany. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Inst Astrofis Andalucia, Granada 18008, Spain. European So Observ, Santiago 19001, Chile. Bartko Sci & Technol, Brighton, CO 80602 USA. Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. Conceptual Analyt LLC, Glenn Dale, MD 20769 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago, Chile. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. WM Keck Observ, Kamuela, HI 96743 USA. RP Holden, BP, Univ Calif Santa Cruz, UCO, Lick Observ, Dept Astron, Santa Cruz, CA 95064 USA. EM holden@ucolick.org NR 62 TC 19 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 20 PY 2005 VL 626 IS 2 PN Part 1 BP 809 EP 822 PG 14 SC Astronomy & Astrophysics GA 935PU UT ISI:000229795000014 ER PT J AU Diez, H Thomas, MC Uruena, CP Santander, SP Cuervo, CL Lopez, MC Puerta, CJ TI Molecular characterization of the kinetoplastid membrane protein-11 genes from the parasite Trypanosoma rangeli SO PARASITOLOGY LA English DT Article DE Trypanosoma rangeli; Trypanosoma cruzi; kinetoplastid membrane protein-11; molecular characterization ID HUMORAL IMMUNE-RESPONSE; INFANTUM KMP-11 PROTEIN; AFRICAN TRYPANOSOMES; LEISHMANIA-DONOVANI; CRUZI INFECTION; LINKAGE GROUPS; KMP11 ANTIGEN; MICE; IDENTIFICATION; CLONING AB Trypanosomatids are early divergent parasites which include several species of medical interest. Trypanosoma rangeli is not pathogenic for humans but shows a high immunological cross-reactivity with Trypanosoma cruzi, the causative agent of Chagas' disease that affects more than 17 million people throughout the world. Recent studies have suggested that T. cruzi KMP-11 antigen could be a good candidate for the induction of immunoprotective cytotoxic responses against T. cruzi natural infection. In the present paper the genes coding for the T. rangeli kinetoplastid membrane protein-11 have been characterized. The results show that the locus encoding this protein is formed by 4 gene units measuring 550 nucleotides in length, organized in tandem, and located in different chromosomes in KP1(+) and KP1(-) strains. The gene units are transcribed as a single mRNA of 530 nucleotides in length. Alignment of the T. rangeli KMP-11 deduced amino acid sequence with the homologous KMP-11 protein from T. cruzi revealed an identity of 97%. Interestingly, the T and B cell epitopes of the T. cruzi KMP-11 protein are conserved in the T. rangeli KMP-11 amino acid sequence. C1 Pontifica Univ Javeriana, Mol Parasitol Lab, Dept Microbiol, Fac Ciencias,Lab 113, Bogota, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. RP Puerta, CJ, Pontifica Univ Javeriana, Mol Parasitol Lab, Dept Microbiol, Fac Ciencias,Lab 113, Carrera 7a 43-82,Edificio 50, Bogota, Colombia. EM epuerta@javeriana.edu.co NR 46 TC 3 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0031-1820 J9 PARASITOLOGY JI Parasitology PD JUN PY 2005 VL 130 PN Part 6 BP 643 EP 651 DI 10.1017/S0031182004006936 PG 9 SC Parasitology GA 938OB UT ISI:000230011600007 ER PT J AU Lampens, P Fremat, Y Garrido, R Pena, JH Parrao, L Van Cauteren, P Cuypers, J De Cat, P Uytterhoeven, K Arentoft, T Hobart, M TI A photometric study of the light variations of the triple system DG Leo SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : binaries : visual; stars : binaries : spectroscopic; stars : variables :delta Sct; stars : individual : DG Leo; rechnique : photometric ID DELTA-SCUTI; VARIABLE-STARS; 20-LEONIS; CLASSIFICATION AB Multi-site and multi-year differential photometry of the triple star DG Leo reveals a complex frequency spectrum that can be modelled as the combination of at least three delta Scuti type frequencies in the range 11.5 - 13 c/d (with semi- amplitudes of 2 - 7 mmag) and a superimposed slow variability of larger amplitude. The period of the slow variation fits very well with half the orbital period of the inner spectroscopic binary indicating the presence of ellipsoidal variations caused by the tidally deformed components in a close configuration. These findings, together with the results of a recent spectroscopic analysis (showing that the system consists of a pair of mild Am stars and one A-type component of normal solar composition), infer that DG Leo is an extremely interesting asteroseismic target. Identification of which component(s) of this multiple system is (or are) pulsating and determination of the excited pulsation modes will both contribute to a much better understanding of the non-trivial link between multiplicity, chemical composition, rotation, and pulsation in the lower part of the classical Cepheid instability strip. C1 Koninklijke Sterrenwacht Belgie, B-1180 Brussels, Belgium. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Beersel Hills Observ, B-1650 Beersel, Belgium. Katholieke Univ Leuven, Inst Astron, B-3001 Louvain, Belgium. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, Denmark. Univ Veracruzana, Fac Fis, Veracruz, Mexico. RP Lampens, P, Koninklijke Sterrenwacht Belgie, Ringlaan 3, B-1180 Brussels, Belgium. EM patricia.lampens@oma.be NR 37 TC 3 PU EDP SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2005 VL 438 IS 1 BP 201 EP 209 DI 10.1051/0004-6361:20042335 PG 9 SC Astronomy & Astrophysics GA 943XC UT ISI:000230387800020 ER PT J AU Scervino, JM Ponce, MA Erra-Bassells, R Vierheilig, H Ocampo, JA Godeas, A TI Arbuscular mycorrhizal colonization of tomato by Gigaspora and Glomus species in the presence of root flavonoids SO JOURNAL OF PLANT PHYSIOLOGY LA English DT Article DE arbuscular mycorrhiza; flavonoids; glomales; signal molecules; symbiosis ID HYPHAL GROWTH; DEFENSE RESPONSE; WHITE CLOVER; FUNGUS; INVITRO; MARGARITA; IDENTIFICATION; PHYTOALEXINS; INTRARADICES; STIMULATION AB The effect of flavonoids isolated from arbuscutar mycorrhizal. (AM) colonized and noncolonized clover roots on the number of entry points and percentage of root colonization of tomato (Lycopersicum esculentum L.) by Gigaspora rosea, Gi margarita, Glomus mosseae and G. intrarradices symbionts was determined. With fungi of both genera, a correlation between the number of entry points and the percentage of root colonization was found in the presence of some of the tested flavonoids. The flavonoids acacetin and rhamnetin, present in AM clover roots, inhibited the formation of AM penetration structures and the AM colonization of tomato roots, whereas the flavonoid 5,6,7,8,9-hydroxy chalcone, which could not be detected in AM clover root, inhibited both parameters. The flavonoid quercetin, which was present in AM clover roots, stimulated the penetration and root colonization of tomato by Gigaspora. However, the flavonoids 5,6,7,8-hydroxy-4'-methoxy flavone and 3,5,6,7,4'-hydroxy flavone, which was not found in AM clover root, increased the number of entry points and the AM colonization of tomato roots by Gigaspora. These results indicated that flavonoids could be implicated in the process of regulation of AM colonization in plant root, but its role is highly complex and depend not only on flavonoids, but also on AM fungal genus or even species. (c) 2005 Elsevier GmbH. All rights reserved. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidan, E-18008 Granada, Spain. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Biodiversidad & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. Univ Buenos Aires, Fac Ciencias Exactas & Nat, CIHIDECAR, CONICET,Dept Quim Organ, RA-1428 Buenos Aires, DF, Argentina. Agr Univ Vienna, Dept Angew Pflanzenwissensch & Pflanzenbiotechnol, Inst Pflanzenschutz, A-1190 Vienna, Austria. RP Ocampo, JA, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidan, Prof Albareda 1,Apdo 419, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 35 TC 10 PU URBAN & FISCHER VERLAG PI JENA PA BRANCH OFFICE JENA, P O BOX 100537, D-07705 JENA, GERMANY SN 0176-1617 J9 J PLANT PHYSIOL JI J. Plant Physiol. PD JUN PY 2005 VL 162 IS 6 BP 625 EP 633 DI 10.1016/j.jplph.2004.08.010 PG 9 SC Plant Sciences GA 943XT UT ISI:000230389900003 ER PT J AU Masetti, N Palazzi, E Pian, E Hunt, L Fynbo, JPU Gorosabel, J Klose, S Benetti, S Falomo, R Zeh, A Amati, L Andersen, MI Castro-Tirado, AJ Ceron, JMC Danziger, J Frontera, F Fruchter, AS Greiner, J Hjorth, J Jensen, BL Kaper, L Kouveliotou, C Levan, A Magazzu, A Wijers, RAMJ van den Heuvel, EPJ TI Late-epoch optical and near-infrared observations of the GRB 000911 afterglow and its host galaxy SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; supernovae : general; radiation mechanisms : non-thermal; cosmology : observations galaxies : high-redshift; galaxy : fundamental parameters ID GAMMA-RAY BURSTS; SOUTHERN SPECTROPHOTOMETRIC STANDARDS; SPECTRAL ENERGY-DISTRIBUTIONS; HUBBLE-SPACE-TELESCOPE; STAR-FORMATION; FOLLOW-UP; INTERSTELLAR EXTINCTION; LUMINOSITY FUNCTION; MAGELLANIC CLOUD; GRB AFTERGLOWS AB We present the results of an optical and near-infrared (NIR) monitoring campaign of the counterpart of Gamma-Ray Burst (GRB) 000911, located at redshift z = 1.06, from 5 days to more than 13 months after explosion. Our extensive dataset is a factor of 2 larger and spans a time interval similar to 4 times longer than the ones considered previously for this GRB afterglow; this allows a more thorough analysis of its light curve and of the GRB host galaxy properties. The afterglow light curves show a single power-law temporal decline, modified at late times by light from a host galaxy with moderate intrinsic extinction, and possibly by an emerging supernova (SN). The afterglow evolution is interpreted within the classical "fireball" scenario as a weakly collimated adiabatic shock propagating in the interstellar medium. The presence of a SN light curve superimposed on the non-thermal afterglow emission is investigated: while in the optical bands no significant contribution to the total light is found from a SN, the NIR J-band data show an excess which is consistent with a SN as bright as the known hypernova SN1998bw. If the SN interpretation is true, this would be the farthest GRB-associated SN, as well as the farthest core-collapse SN, discovered to date. However, other possible explanations of this NIR excess are also investigated. Finally, we studied the photometric properties of the host, and found that it is likely to be a slightly reddened, subluminous, extreme starburst compact galaxy, with luminosity similar to 0.1 L-star, an age of similar to 0.5 Gyr and a specific Star Formation Rate (SFR) of approximate to 30 M-circle dot yr(-1) (L/L-star)(-1). This is the highest specific SFR value for a GRB host inferred from optical/NIR data. C1 INAF, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy. CNR, IASF, I-40126 Bologna, Italy. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Ist Radioastron, INAF, Sez Firenze, I-50125 Florence, Italy. Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. CSIC, IAA, Granada, Spain. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Osserv Astron Padova, INAF, I-35122 Padua, Italy. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Max Planck Inst Extraterr Phys, D-85748 Garching, Germany. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. INAF, Telescopio Nazl Galileo, Roque Los Muchachos Astron Observ, Santa Cruz de La Palma 38700, Spain. European So Observ, D-85748 Garching, Germany. INAF, Ist AStrofis Spacial & Fis Cosm, Sez Palermo, I-90146 Palermo, Italy. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. European So Observ, Santiago 19, Chile. RP Masetti, N, INAF, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, Via Gobetti 101, I-40129 Bologna, Italy. EM masetti@bo.iasf.cnr.it NR 95 TC 5 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2005 VL 438 IS 3 BP 841 EP 853 DI 10.1051/0004-6361:20052763 PG 13 SC Astronomy & Astrophysics GA 946ZK UT ISI:000230611600010 ER PT J AU Pappas, GJ Benabdellah, K Zingales, B Gonzalez, A TI Expressed sequence tags from the plant trypanosomatid Phytomonas serpens SO MOLECULAR AND BIOCHEMICAL PARASITOLOGY DT Article DE Phytomonas serpens; expressed sequence tags; hexose transporters; microsatellites; stability motifs ID HEXOSE TRANSPORTER GENE; MESSENGER-RNA TURNOVER; LEISHMANIA-ENRIETTII; GLUCOSE TRANSPORTERS; EUPHORBIA-CHARACIAS; KINETOPLAST DNA; BRUCEI; DISTINCT; METABOLISM; GENERATION AB We have generated 2190 expressed sequence tags (ESTs) from a cDNA library of the plant trypanosomatid Phytomonas serpens. Upon processing and clustering the set of 1893 accepted sequences was reduced to 697 clusters consisting of 452 singletons and 245 contigs. Functional categories were assigned based on BLAST searches against a database of the eukaryotic orthologous groups of proteins (KOG). Thirty six percent of the generated sequences showed no hits against the KOG database and 39.6% presented similarity to the KOG classes corresponding to translation, ribosomal structure and biogenesis. The most populated cluster contained 45 ESTs homologous to members of the glucose transporter family. This fact can be immediately correlated to the reported Phytomonas dependence on anaerobic glycolytic ATP production due to the lack of cytochrome-mediated respiratory chain. In this context, not only a number of enzymes of the glycolytic pathway were identified but also of the Krebs cycle as well as specific components of the respiratory chain. The data here reported, including a few hundred unique sequences and the description of tandemly repeated motifs and putative transcript stability motifs at untranslated mRNA ends, represent an initial approach to overcome the lack of information on the molecular biology of this organism. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Catolica Brazilia, Genom Sci & Biotechnol Program, Brasilia, DF, Brazil. Univ Sao Paulo, Inst Quim, Dept Bioquim, BR-05508 Sao Paulo, Brazil. CSIC, Inst Parasitol & Biomed, E-18100 Granada, Spain. RP Gonzalez, A, Univ Catolica Brazilia, Genom Sci & Biotechnol Program, Brasilia, DF, Brazil. EM aga@ipb.csic.es NR 41 TC 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-6851 J9 MOL BIOCHEM PARASITOL JI Mol. Biochem. Parasitol. PD AUG PY 2005 VL 142 IS 2 BP 149 EP 157 DI 10.1016/j.molbiopara.2005.03.017 PG 9 SC Biochemistry & Molecular Biology; Parasitology GA 947ZY UT ISI:000230687000002 ER PT J AU Zirm, AW Overzier, RA Miley, GK Blakeslee, JP Clampin, M De Breuck, C Demarco, R Ford, HC Hartig, GF Homeier, N Illingworth, GD Martel, AR Rottgering, HJA Venemans, B Ardila, DR Bartko, F Benitez, NB Bouwens, RJ Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Cross, NJG Feldman, PD Franx, M Golimowski, DA Goto, T Gronwall, C Holden, B Infante, L Kimble, RA Krist, JE Lesser, MP Mei, S Menanteau, F Meurer, GR Motta, V Postman, M Rosati, P Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W TI Feedback and brightest cluster galaxy formation: ACS observations of the radio galaxy TNJ J1338-1942 AT z=4.1 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : halos; galaxies : high-redshift; galaxies : individual (TN J1338-1942) ID LYMAN-BREAK GALAXIES; EMISSION-LINE PROPERTIES; JET-CLOUD INTERACTIONS; LY-ALPHA EMITTERS; X-RAY SURVEY; K-Z RELATION; HIGH-REDSHIFT; STAR-FORMATION; GALACTIC SUPERWINDS; KECK SPECTROPOLARIMETRY AB We present deep optical imaging of the z 4: 1 radio galaxy TN J1338 - 1942, obtained using the Advanced Camera for Surveys ( ACS) on board the Hubble Space Telescope, as well as ground- based near- infrared imaging data from the European Southern Observatory ( ESO) Very Large Telescope ( VLT). The radio galaxy is known to reside within a large galaxy overdensity ( both in physical extent and density contrast). There is good evidence that this `` protocluster'' region is the progenitor of a present- day rich galaxy cluster. TN J1338 is the dominant galaxy in the protocluster in terms of size and luminosity ( in both the optical and near- infrared) and therefore seems destined to evolve into the brightest cluster galaxy. The high spatial resolution ACS images reveal several kiloparsec- scale features within and around the radio galaxy. The continuum light is aligned with the radio axis and is resolved into two clumps in the i(775) and z(850) bands. These components have luminosities similar to 10(9) L-circle dot and sizes of a few kpc. The estimated nebular continuum, scattered light, synchrotron- and inverse Compton - scattering contributions to the aligned continuum light are only a few percent of the observed total, indicating that the observed flux is likely dominated by forming stars. The estimated star formation rate for the whole radio galaxy is similar to 200M(circle dot) yr(-1). A simple model in which the jet has triggered star formation in these continuum knots is consistent with the available data. A striking, but small, linear feature is evident in the z850 aligned light and may be indicative of a large- scale shock associated with the advance of the radio jet. The rest of the aligned light also seems morphologically consistent with star formation induced by shocks associated with the radio source, as seen in other high- z radio galaxies ( e. g., 4C 41.17). An unusual feature is seen in Ly alpha emission. A wedge- shaped extension emanates from the radio galaxy perpendicularly to the radio axis. This `` wedge'' naturally connects to the surrounding asymmetric, large- scale (similar to 100 kpc) Ly alpha halo. We posit that the wedge is a starburst- driven superwind associated with the first major epoch of formation of the brightest cluster galaxy. The shock and wedge are examples of feedback processes due to both active galactic nucleus and star formation in the earliest stages of massive galaxy formation. C1 Leiden Observ, NL-2300 RA Leiden, Netherlands. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. European So Observ, D-85748 Garching, Germany. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. Conceptual Analyt LLC, Glenn Dale, MD 20769 USA. Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland. Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. WM Keck Observ, Kamuela, HI 96743 USA. RP Zirm, AW, Leiden Observ, Postbus 9513, NL-2300 RA Leiden, Netherlands. NR 96 TC 11 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 2005 VL 630 IS 1 PN Part 1 BP 68 EP 81 PG 14 SC Astronomy & Astrophysics GA 958JD UT ISI:000231439700006 ER PT J AU Lopez-Lara, IM Gao, JL Soto, MJ Solares-Perez, A Weissenmayer, B Sohlenkamp, C Verroios, GP Thomas-Oates, J Geiger, O TI Phosphorus-free membrane lipids of Sinorhizobium meliloti are not required for the symbiosis with alfalfa but contribute to increased cell yields under phosphorus-limiting conditions of growth SO MOLECULAR PLANT-MICROBE INTERACTIONS LA English DT Article ID RHIZOBIUM-MELILOTI; NITROGEN-FIXATION; RHODOBACTER-SPHAEROIDES; PHOSPHATE ASSIMILATION; ACIDIC PHOSPHOLIPIDS; ESCHERICHIA-COLI; GENE-EXPRESSION; CLONING VECTORS; BIOSYNTHESIS; IDENTIFICATION AB The microsymbiont of alfalfa, Sinorhizobium meliloti, possesses phosphatidylglycerol, cardiolipin, phosphatidylethanolamine, and phosphatidylcholine as major membrane phospholipids, when grown in the presence of sufficient accessible phosphorus sources. Under phosphate-limiting conditions of growth, S. meliloti replaces its phospholipids by membrane lipids that do not contain any phosphorus in their molecular structure and, in S. meliloti, these phosphorus-free membrane lipids are sulphoquinovosyl diacyl-glycerols (SL), ornithine-containing lipids (OL), and diacylglyceryl-N,N,N-trimethylhomoserines (DGTS). In earlier work, we demonstrated that neither SL nor OL are required for establishing a nitrogen-fixing root nodule symbiosis with alfalfa. We now report the identification of the two structural genes btaA and btaB from S. meliloti required for DGTS biosynthesis. When the sinorhizobial btaA and btaB genes are expressed in Escherichia coli, they cause the formation of DGTS in this latter organism. A btaA-deficient mutant of S. meliloti is unable to form DGTS but can form nitrogen-fixing root nodules on alfalfa, demonstrating that sinorhizobial DGTS is not required for establishing a successful symbiosis with the host plant. Even a triple mutant of S. meliloti, unable to form any of the phosphorus-free membrane lipids SL, OL, or DGTS is equally competitive for nodule occupancy as the wild type. Only under growth-limiting concentrations of phosphate in culture media did mutants that could form neither OL nor DGTS grow to lesser cell densities. C1 Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Cuernavaca 62210, Morelos, Mexico. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, E-18008 Granada, Spain. Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England. UMIST, Dept Chem, Michael Barber Ctr Mass Spectrometry, Manchester M60 1QD, Lancs, England. RP Geiger, O, Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Apdo Postal 565-A, Cuernavaca 62210, Morelos, Mexico. EM otto@ccg.unam.mx NR 43 TC 3 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA SN 0894-0282 J9 MOL PLANT MICROBE INTERACTION JI Mol. Plant-Microbe Interact. PD SEP PY 2005 VL 18 IS 9 BP 973 EP 982 DI 10.1094/MPMI-18-0973 PG 10 SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Plant Sciences GA 958JF UT ISI:000231439900009 ER PT J AU Lorente, SO Jimenez, CJ Gros, L Yardley, V de Luca-Fradley, K Croft, SL Urbina, JA Ruiz-Perez, LM Pacanowska, DG Gilbert, IH TI Preparation of transition-state analogues of sterol 24-methyl transferase as potential anti-parasities SO BIOORGANIC & MEDICINAL CHEMISTRY LA English DT Article ID TRYPANOSOMA SCHIZOTRYPANUM CRUZI; HIGH-ENERGY INTERMEDIATE; BORANE-DIMETHYL SULFIDE; METHYL TRANSFERASE; IN-VITRO; DELTA-24-STEROL METHYLTRANSFERASE; SACCHAROMYCES-CEREVISIAE; LEISHMANIA-DONOVANI; CANDIDA-ALBICANS; INHIBITORS AB There is an urgent need for new drugs to treat leishmaniasis and Chagas disease. One important drug target in these organisms is sterol biosynthesis. In these organisms the main endogenous sterols are ergosta- and stigmata-like compounds in contrast to the situation in mammals, which have cholesterol as the sole sterol. In this paper we discuss the design, synthesis and evaluation of potential transition state analogues of the enzyme Delta(24(25))-methyltransferase (24-SMT). This enzyme is essential for the biosynthesis of ergosterol, but not required for the biosynthesis of cholesterol. A series of compounds were successfully synthesised in which mimics of the S-adenosyl methionine co-factor were attached to the sterol nucleus. Compounds were evaluated against recombinant Leishmania major 24-SMT and the parasites L. donovani and Trypanosoma cruzi in vitro, causative organisms of leishmaniasis and Chagas disease, respectively. Some of the-compounds showed inhibition of the recombinant Leishmania major 24-SMT and induced growth inhibition of the parasites. Some compounds also showed anti-parasitic activity against L. donovani and T cruzi, but no inhibition of the enzyme. In addition, some of the compounds had anti-proliferative activity against the bloodstream forms of Trypanosoma brucei rhodesiense, which causes African trypanosomiasis. (c) 2005 Published by Elsevier Ltd. C1 Univ Cardiff Wales, Welsh Sch Pharm, Cardiff CF10 3XF, S Glam, Wales. Consejo Super Invest Cientificas, Inst Parastiol & Biomed Lopez Neyra, Granada 18100, Spain. London Sch Hyg & Trop Med, London WC1E 7HT, England. IVIC, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020, Venezuela. RP Gilbert, IH, Univ Cardiff Wales, Welsh Sch Pharm, Redwood Bldg,King Edward 7th Ave, Cardiff CF10 3XF, S Glam, Wales. EM gilbertih@cf.ac.uk NR 41 TC 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0968-0896 J9 BIOORGAN MED CHEM JI Bioorg. Med. Chem. PD SEP 15 PY 2005 VL 13 IS 18 BP 5435 EP 5453 DI 10.1016/j.bmc.2005.06.012 PG 19 SC Biochemistry & Molecular Biology; Chemistry, Medicinal; Chemistry, Organic GA 959CF UT ISI:000231493800010 ER PT J AU Resmi, L Ishwara-Chandra, CH Castro-Tirado, AJ Bhattacharya, D Rao, AP Bremer, M Pandey, SB Sahu, DK Bhatt, BC Sagar, R Anupama, GC Subramaniam, A Lundgren, A Gorosabel, J Guziy, S Postigo, AD Ceron, JMC Wiklind, T TI Radio, millimeter and optical monitoring of GRB 030329 afterglow: constraining the double jet model SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts ID GAMMA-RAY BURST; 29 MARCH 2003; LIGHT CURVES; GRB-030329; SUPERNOVA; VARIABILITY; TELESCOPE; GRB030329; EVOLUTION; EMISSION AB We present radio, millimeter and optical observations of the afterglow of GRB 030329. UBVRCIC photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz has been carried out using the GMRT for more than a year. Simultaneous millimeter observations at 90 GHz and 230 GHz have been obtained from the Swedish-ESO Submillimeter Telescope (SEST) and the IRAM-PdB interferometer over more than a month following the burst. We use these data to constrain the double jet model proposed by Berger et al. ( 2003) for this afterglow. We also examine whether instead of the two jets being simultaneously present, the wider jet could result from the initially narrow jet, due to a fresh supply of energy from the central engine after the "jet break". C1 Raman Res Inst, Bangalore 560080, Karnataka, India. Indian Inst Sci, Joint Astron Programme, Bangalore 560012, Karnataka, India. Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India. Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France. Aryabhatta Res Inst Observ Sci, Naini Tal 263129, India. Indian Inst Astrophys, Bangalore 560034, Karnataka, India. Ctr Res & Educ Sci & Technol, Bangalore 562114, Karnataka, India. European So Observ, Alonso De Cordova, Chile. Stockholm Observ, S-10691 Stockholm, Sweden. Nikolaev State Univ, Astron Observ, UA-54030 Nikolayev, Ukraine. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Resmi, L, Raman Res Inst, Bangalore 560080, Karnataka, India. EM resmi@rri.res.in NR 48 TC 9 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2005 VL 440 IS 2 BP 477 EP U42 DI 10.1051/0004-6361:20041642 PG 20 SC Astronomy & Astrophysics GA 959VM UT ISI:000231547400016 ER PT J AU Martin-Ruiz, S Amado, PJ Suarez, JC Moya, A Ferro, AA Ribas, I Poretti, E TI HD 172189: an eclipsing and spectroscopic binary with a delta Sct-type pulsating component in an open cluster SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : binaries : eclipsing; stars : oscillations; stars : variables : delta Sct; galaxy : open clusters and association : IC4756 ID IC-4756; COROT; CHAMAELEONTIS; MEMBERSHIP; PHOTOMETRY; 4-COLOR; MISSION; SYSTEMS; STARS AB We present a study based on more than 2500 uvby-measurements collected on HD172189, a new eclipsing binary system with a delta Sct-type pulsating component that belongs to the open cluster IC4756. The great interest of this object lies in that three important characteristics coexist: cluster membership, binarity and pulsation. Its binarity and the delta Sct-type pulsations of one component were detected in the course of several Strmgren photometric campaigns. The frequency analysis of all the uvby out-of-eclipse data reveals a clear frequency of 19.5974 cd(-1) as well as the existence of other high values in the range 18-20 cd(-1). We have also carried out a first evaluation of the binary parameters and determined a value of 5.702 d for the orbital period. An additional potential interest of HD172189 resides in its location in the field of view of the COROT mission and, therefore, this star is an excellent candidate for becoming a target for asteroseismology. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. European So Observ, Santiago 19, Chile. Observ Paris, LESIA, F-92195 Meudon, France. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, Inst Estudis Espacials Catalunya, Fac Ciencies, E-08193 Barcelona, Spain. INAF, Osserv Astron Brera, I-23807 Merate, Italy. RP Martin-Ruiz, S, CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain. EM susana@iaa.es NR 25 TC 3 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2005 VL 440 IS 2 BP 711 EP 714 DI 10.1051/0004-6361:20053549 PG 4 SC Astronomy & Astrophysics GA 959VM UT ISI:000231547400038 ER PT J AU Patel, NA Curiel, S Sridharan, TK Zhang, QZ Hunter, TR Ho, PTP Torrelles, JM Moran, JM Gomez, JF Anglada, G TI A disk of dust and molecular gas around a high-mass protostar SO NATURE LA English DT Article ID THERMAL RADIO JET; CEPHEUS-A HW2; CONTINUUM EMISSION; STAR-FORMATION; ACCRETION; CLOUD; OUTFLOW; OBJECTS; SYSTEM; CORES AB The processes leading to the birth of low-mass stars such as our Sun have been well studied(1), but the formation of high-mass ( over eight times the Sun's mass, M-.) stars remains poorly understood(2). Recent studies suggest that high-mass stars may form through accretion of material from a circumstellar disk(3), in essentially the same way as low-mass stars form, rather than through the merging of several low-mass stars(4). There is as yet, however, no conclusive evidence(5,6). Here we report the presence of a flattened disk-like structure around a massive 15M(.) protostar in the Cepheus A region, based on observations of continuum emission from the dust and line emission from the molecular gas. The disk has a radius of about 330 astronomical units (AU) and a mass of 1 to 8 M(: It is oriented perpendicular to, and spatially coincident with, the central embedded powerful bipolar radio jet, just as is the case with low-mass stars, from which we conclude that high-mass stars can form through accretion. C1 Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Acad Sinica, Inst Astron & Astrophys, Taipei 115, Taiwan. Consejo Super Invest Cient, IEEC, E-08034 Barcelona, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. RP Patel, NA, Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS78, Cambridge, MA 02138 USA. EM npatel@cfa.harvard.edu NR 30 TC 38 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD SEP 1 PY 2005 VL 437 IS 7055 BP 109 EP 111 DI 10.1038/nature04011 PG 3 SC Multidisciplinary Sciences GA 960AC UT ISI:000231560400050 ER PT J AU Scervino, JM Ponce, MA Erra-Bassells, R Vierheilig, H Ocampo, JA Godeas, A TI Flavonoids exhibit fungal species and genus specific effects on the presymbiotic growth of Gigaspora and Glomus SO MYCOLOGICAL RESEARCH LA English DT Article ID ARBUSCULAR-MYCORRHIZAL FUNGI; HYPHAL GROWTH; INVITRO; COLONIZATION; RECOGNITION; ROOTS AB The effect of the flavonoids chrysin, isorhamnetin, kaempferol, luteolin, morm and rutin on pre-symbiotic growth, such as spore germination, hyphal length, hyphal branching and the formation of auxiliary cells and secondary spores, of the arbuscular mycorrhizal fungi Gigaspora rosea, G. margarita, Glornus mosseve and G. intraradices was studied. According to the effect on each fungal growth parameter, the tested compounds could be classified to be genus and/or species specific or specific, for a certain developmental stage of pre-symbiotic growth. A clear arbuscular mycorrhizal genus specific, and even species specific, effect of some flavonoids was observed. However, this specificity of a flavonoid could not be generalized but differs depending on the pre-symbiotic stage of the AM fungus. Moreover, our show that for a better understanding of the role of compounds in the AM symbiosis, studies should not be conducted only with one AM fungus looking at one fungal growth parameter such as spore germination or hyphal length, but should be wider, including several growth parameters and several AM fungi. C1 CSIC, Dept Microbiol, E-18008 Granada, Spain. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Biodiversidad & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. Univ Buenos Aires, Fac Ciencias Exactas & Nat, CIHIDECAR, CONICET,Dept Quim Organ, RA-1428 Buenos Aires, DF, Argentina. Univ Bodenkultur Wien, Dept Angew Pflanzenwissenschaften & Pflanzenbiote, Inst Pflanzenschutz, A-1190 Vienna, Austria. RP Ocampo, JA, CSIC, Dept Microbiol, Estac Expt Zaidin, E-18008 Granada, Spain. EM jocampo@eez.esic.es NR 23 TC 10 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0953-7562 J9 MYCOL RES JI Mycol. Res. PD JUL PY 2005 VL 109 PN Part 7 BP 789 EP 794 DI 10.1017/S0953756205002881 PG 6 SC Mycology GA 961HZ UT ISI:000231654000004 ER PT J AU Hjorth, J Sollerman, J Gorosabel, J Granot, J Klose, S Kouveliotou, C Melinder, J Ramirez-Ruiz, E Starling, R Thomsen, B Andersen, MI Fynbo, JPU Jensen, BL Vreeswijk, PM Ceron, JMC Jakobsson, P Levan, A Pedersen, K Rhoads, JE Tanvir, NR Watson, D Wijers, RAMJ TI GRB 050509B: Constraints on short gamma-ray burst models SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts; supernovae : general ID NEUTRON-STAR MERGERS; SHORT-DURATION; OPTICAL AFTERGLOW; SUPERNOVA; EMISSION; PHOTOMETRY; COLLAPSARS; DISCOVERY; FLASHES; SEARCH AB We have obtained deep optical images with the Very Large Telescope at ESO of the first well-localized short-duration gamma-ray burst, GRB 050509B. From V and R imaging, initiated similar to 2 days after the GRB trigger and lasting up to three weeks, we detect no variable object inside the small Swift XRT X-ray error circle down to 2 sigma limits of V = 26.5 and R = 25.1. The X-ray error circle includes a giant elliptical galaxy at z = 0.225, which has been proposed as the likely host of this GRB. Our limits indicate that if the GRB originated at, z = 0.225 any supernova-like event accompanying the GRB would have to be over 100 times fainter than normal Type Ia SNe or Type Ic hypernovae, 5 times fainter than the faintest known Ia or Ic SNe, and fainter than the faintest known Type II SNe. Moreover, we use the optical limits to constrain the energetics of the GRB outflow. Simple models indicate that unless the intrinsic energy in the outflow from GRB 050509B was <= 10(51) ergs, there was very little radioactive material with efficient decay timescales for generating a large luminosity. These limits strongly constrain progenitor models for this short GRB. C1 Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Stockholm Univ, Dept Astron, S-10691 Stockholm, Sweden. Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain. Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. NASA, George C Marshall Space Flight Ctr, Natl Space Sci Technol Ctr, Huntsville, AL 35805 USA. Inst Adv Study, Princeton, NJ 08540 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, Denmark. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. European So Observ, Santiago 19, Chile. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. RP Hjorth, J, Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. EM jens@astro.ku.dk josemari@alumni.nd.edu jgu@iaa.es granot@slac.stanford.edu klose@tls-tautenburg.de chryssa.kouveliotou-1@nasa.gov jesper@astro.su.se enrico@ias.edu starling@science.uva.nl bt@phys.au.dk mandersen@aip.de jfynbo@astro.ku.dk jens@astro.ku.dk pvreeswi@eso.org brian_j@astro.ku.dk pallja@astro.ku.dk anl@star.le.ac.uk kp@astro.ku.dk rhoads@stsci.edu nrt@star.herts.ac.uk darach@astro.ku.dk rwijers@science.uva.nl NR 46 TC 40 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 10 PY 2005 VL 630 IS 2 PN Part 2 BP L117 EP L120 PG 4 SC Astronomy & Astrophysics GA 961LT UT ISI:000231664600004 ER PT J AU Poretti, E Suarez, JC Niarchos, PG Gazeas, KD Manimanis, VN Van Cauteren, P Lampens, P Wils, P Alonso, R Amado, PJ Belmonte, JA Butterworth, ND Martignoni, M Martin-Ruiz, S Moskalik, P Robertson, CW TI The double-mode nature of the HADS star GSC 00144-03031 and the Petersen diagram of the class SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE methods : data analysis; stars : oscillations; techniques : photometric; stars : variables : delta Sct; stars : individual : GSC 00144-03031 ID GRAVITATIONAL LENSING EXPERIMENT; SKY AUTOMATED SURVEY; DELTA-SCUTI STARS; VARIABLE-STARS; SOUTHERN-HEMISPHERE; OSCILLATIONS; OPACITIES; BEHAVIOR; EQUATION; PROJECT AB The double-mode pulsation of GSC 00144-03031 has been detected when searching for COROT targets. A very large dataset composed of 4722 photometric measurements was collected at six observatories in Europe and America. There is no hint of the excitation of additional modes (down to 0.6 mmag) and therefore GSC 00144-03031 seems to be a pure double-mode pulsator, with a very short fundamental radial mode (P = 84 min). From uvby beta photometry and evolutionary tracks it appears to be a Pop. I star with M = 1.75 M., located in the middle of the instability strip, close to the Zero-Age Main Sequence. We also discovered other new double-mode pulsators in the databases of large-scale projects: OGLE BW2_V142, OGLE BW1_V207, ASAS3 094303-1707.3, ASAS3 000116-6037.0, NSVS 3234596 and NSVS 3324715. An observational Petersen diagram is presented and explained by means of new models. A common sequence connecting Pop. I stars from the shortest to the longest periods is proposed and the spreads in the period ratios are ascribed to different metallicities (at the shortest periods) and to different masses (at the longest ones). C1 INAF, Osservatorio Astron Brera, I-23807 Merate, Italy. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Athens, Fac Phys, Dept Astrophys Astron & Mech, Athens 15784, Greece. Beersel Hills Observ, B-1650 Beersel, Belgium. GEOS, F-28300 Bailleau Leveque, France. Koninklijke Sterrenwacht Belgie, B-1180 Brussels, Belgium. Inst Astrofis Canarias, Tenerife 38200, Spain. European So Observ, Santiago 19, Chile. Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland. SETEC Observ, Goddard, KS USA. RP Poretti, E, INAF, Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, Italy. EM poretti@merate.mi.astro.it NR 40 TC 6 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2005 VL 440 IS 3 BP 1097 EP 1104 DI 10.1051/0004-6361:20053463 PG 8 SC Astronomy & Astrophysics GA 961VG UT ISI:000231689300028 ER PT J AU Gavito, ME Olsson, PA Rouhier, H Medina-Penafiel, A Jakobsen, I Bago, A Azcon-Aguilar, C TI Temperature constraints on the growth and functioning of root organ cultures with arbuscular mycorrhizal fungi SO NEW PHYTOLOGIST LA English DT Article DE arbuscular mycorrhizal fungi (AMF); carbon; growth; mycorrhiza; phosphorus; temperature; translocation; uptake ID SOIL-TEMPERATURE; ATMOSPHERIC CO2; CLIMATE-CHANGE; PLANT-GROWTH; ELEVATED CO2; COLONIZATION; IMPACT; HYPHAE; TRANSLOCATION; METABOLISM AB (.) In this study we investigated the effects of temperature on fungal growth and tested whether the differences in fungal growth were related to the effects of temperature on carbon movement to, or within, the fungus. (.) Growth curves and C uptake-transfer-translocation measurements were obtained for three arbuscular mycorrhizal fungi (AMF) isolates cultured within a 6-30 degrees C temperature range. A series of experiments with a model fungal isolate, Glomus intraradices, was used to examine the effects of temperature on lipid body and 33 P movement, and to investigate the role of acclimation and incubation time. (.) Temperature effects on AMF growth were both direct and indirect because, despite clear independent root and AMF growth responses in some cases, the uptake and translocation of 13 C was also affected within the temperature range tested. Root C uptake and, to a lesser extent, C translocation in the fungus, were reduced by low temperatures (< 18 C). Uptake and translocation of 33 P by fungal hyphae were, by contrast, similar between 10 and 25 C. (.) We conclude that temperature, between 6 and 18 C, reduces AMF growth, and that C movement to the fungus is involved in this response. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Lund Univ, Dept Microbial Ecol, S-22362 Lund, Sweden. Riso Natl Lab, Dept Biosyst, DK-4000 Roskilde, Denmark. RP Gavito, ME, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Apartado Postal 27-3, Morelia 58090, Michoacan, Mexico. EM mgavito@oikos.unam.mx NR 39 TC 3 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0028-646X J9 NEW PHYTOL JI New Phytol. PD OCT PY 2005 VL 168 IS 1 BP 179 EP 188 DI 10.1111/j.1469-8137.2005.01481.x PG 10 SC Plant Sciences GA 962CD UT ISI:000231707700018 ER PT J AU Arriagada, CA Herrera, MA Ocampo, JA TI Contribution of arbuscular mycorrhizal and saprobe fungi to the tolerance of Eucalyptus globulus to Pb SO WATER AIR AND SOIL POLLUTION LA English DT Article DE arbuscular mycorrhizal fungi; phytoextraction; Eucalyptus; Pb tolerance; saprobe fungi ID GLOMUS-MOSSEAE; CONTAMINATED SOILS; AQUEOUS-SOLUTIONS; SOYBEAN PLANTS; HEAVY-METALS; GROWTH; LEAD; INFECTION; PHYTOREMEDIATION; L. AB The application of Pb inhibited the development of mycelia of the saprobe fungi Fusarium concolor and Trichoderma koningii and the hyphal length of the arbuscular mycorrhizal fungi (AM) Glomus mosseae and G. deserticola in vitro. The application to soil of 1500 mg kg(-1) of Pb decreases the dry weight, total N, P, Mg and Fe concentration and chlorophyll content of the shoot of E. globulus no inoculated with AM fungi. However, G. deserticola increased the dry weight, total nutrient concentration and chlorophyll content of the shoot, and the percentage of AM root length colonization and the succinate dehydrogenase activity of AM mycelia of E. globulus in presence of 1500 mg kg(-1) of Pb, and these increases were higher when G. deserticola was inoculated together with T. koningii. The application to soil of 3000 mg kg(-1)of Pb decreased the shoot dry weight and AM colonization of E. globulus in all treatments tested. Pb was accumulated in the stem more than in the leaves of E. globulus. In presence of 1500 mg kg-1 of Pb the highest accumulation of this metal in the stem took place when E. globulus was colonized with G. deserticola. In conclusion, the possibility to increase Lead accumulation in stem is very attractive for phytoextraction function, the saprobe fungi, AM and their interaction may have a potential role in elevating phytoextraction efficiency and stimulate plant growth under adverse conditions such as lead contaminated soil. C1 CSIC, Dept Microbiol Suelo & Sist Simbiot, Estacion Expt Zaidin, E-18008 Granada, Spain. Univ Cordoba, Dept Ingn Forestal, Escuela Tecn Super Ingn Agron & Montes, E-14080 Cordoba, Spain. Univ La Frontera, Fac Ciencias Agropecuarias & Forestales, Dept Ciencias Forestales, Temuco, Chile. RP Ocampo, JA, CSIC, Dept Microbiol Suelo & Sist Simbiot, Estacion Expt Zaidin, Profesor Albareda 1, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 67 TC 6 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0049-6979 J9 WATER AIR SOIL POLLUT JI Water Air Soil Pollut. PD SEP PY 2005 VL 166 IS 1-4 BP 31 EP 47 DI 10.1007/s11270-005-7711-z PG 17 SC Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources GA 963MJ UT ISI:000231808100004 ER PT J AU Paunzen, E Pintado, OI Maitzen, HM Claret, A TI On the incidence of chemically peculiar stars in the Large Magellanic Cloud SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE techniques : photometric; stars : chemically peculiar; stars : statistics; Magellanic Clouds ID 5200-ANGSTROM FLUX DEPRESSION; CCD PHOTOMETRIC SEARCH; LAMBDA-BOOTIS STARS; OPEN CLUSTERS; AP-STARS; MAIN-SEQUENCE; AGE; LMC; DIAGRAM AB With the aim to corroborate the result of a search for chemically peculiar stars in the Large Magellanic Cloud (LMC), we present measurements obtained from CCD imaging of two fields, one containing a young open cluster (NGC 1711). While for the latter field, including its surrounding we obtain a contribution of 3 per cent of chemically peculiar stars detectable by Delta a photometry (i.e. the magnetic objects of this group), the second field yields about half of this value in good accordance with Maitzen et al.'s finding for NGC 1866, the surrounding field of which has been found to exhibit a very low value of such stars (0.3 per cent). Thus, we are faced with the fact that our incipient impression about a substantially lower appearance of magnetic chemically peculiar stars in the LMC as compared to the Galaxy continues to be valid. Most of the photometrically identified peculiar stars (from their historical origin denominated Ap stars) are located in the domain of the B-type stars. However, this is a selection effect due to the limiting magnitude of our observing conditions impeding the observation of fainter main-sequence stars. In addition to objects showing up as positive deviators in Delta a photometry, we also discuss nine stars which appear opposite the main line of normal stars, and hence are negative deviators. For most of them, the interpretation as emission stars of B-type seems to be appropriate. The statistically relevant number of observations obtained so far in the LMC supports the view that the formation of magnetic peculiar stars has occurred there at a significantly lower rate. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Univ Nacl Tucuman, Dept Fis, Fac Ciencias Exactas & Technol, Argentina Consejo Nacl Invest Cientif & Tecn, San Miguel De Tucuman, Argentina. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Paunzen, E, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM Ernst.Paunzen@univie.ac.at NR 36 TC 6 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD SEP 21 PY 2005 VL 362 IS 3 BP 1025 EP 1030 DI 10.1111/j.1365-2966.2005.09371.x PG 6 SC Astronomy & Astrophysics GA 968JH UT ISI:000232158300028 ER PT J AU Gomez, LM Pineda-Tamayo, R Martin, J Anaya, JM TI Polymorphism in gene coding for LYP is a risk factor for primary Sjogren's syndrome and systemic lupus erythematosus. SO ARTHRITIS AND RHEUMATISM LA English DT Meeting Abstract C1 Corp Invest Biol, Medellin, Colombia. Clin Univ Bolivariana, UPB, Medellin, Colombia. CSIC, Granada, Spain. U Rosario, CIB, Medellin, Colombia. NR 0 TC 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0004-3591 J9 ARTHRITIS RHEUM JI Arthritis Rheum. PD SEP PY 2005 VL 52 IS 9 SU Suppl. S BP S376 EP S376 PG 1 SC Rheumatology GA 969BG UT ISI:000232207801487 ER PT J AU Contreras-Jurado, C Sanchez-Morito, N Ruiz-Contreras, A Gonzalez-Martinez, MT Soler-Diaz, A TI Evidence for simultaneous 1Na(+): 1Mg(2+) and ping pong 2Na(+): 1Mg2+exchangers in rat thymocytes SO FRONTIERS IN BIOSCIENCE LA English DT Article DE Na/Mg exchange; ping pong exchanger; simultaneous exchanger; amiloride; thymocytes ID RED-BLOOD-CELLS; INTRACELLULAR CA2+ STORES; PLASMA-MEMBRANE; MAGNESIUM TRANSPORT; MG2+ TRANSPORTERS; NA+/MG2+ ANTIPORT; NA+; EXCHANGE; MECHANISMS; EFFLUX AB Rat thymocytes showed two Na+/ Mg2+ exchangers with high- and low- affinities for external Na+ ( Na-o(+)) at physiological internal Mg2+ content. The total internal Mg2+ content ( Mg2+ (it)) was enhanced by loading with MgCl2 and the ionophore A- 23187. Under these conditions, Na+/ Mg2+ exchangers were dramatically stimulated by the Mg2+ (it) increase. Na+- induced Mg2+ effluxes were independent of Cl-o(-) or H+. The Na+/ Mg2+ exchangers, which we named HANao ( high affinity for Na-o(+)) and LANao ( low affinity for Na-o(+)), were dissected in Mg2+- loaded thymocytes according to their kinetics and stoichiometries. HANao, which showed an apparent dissociation constant for Na-o(+) ( K-Na H) = 9.2 +/- 1.6 mmol l(-1) Na-o(+) and a maximal Na+ influx rate ( V-Na( Na (H)) (max)) = 30.5 +/- 6.1 mmol ( 1 cells)(-1) h(-1), was a 1Na(+): 1Mg(2+) simultaneous antiporter insensitive to external magnesium ( Mg-o(2+)) whereas that LANao, with K-Na (L) = 65.1 +/- 8.6 mmol l(-1) Na+ and a V-Na( Na (L)) (max) = 79.5 +/- 14.3 mmol ( l cells)(-1) Na+ h(-1), was a 2Na(+): 1Mg(2+) " ping- pong" antiporter which was strongly inhibited by Mg-o(2+). At physiological concentration of Mg-o(2+) ( 1 mM), the Na+/ Mg2+ exchange through the LANao was inhibited by similar to 50%. Amiloride ( 10(-4) M) inhibited at similar extent both Na+ and Mg2+ fluxes at high and at low Na-o(+). C1 Univ Madrid, Fac Med, Dept Fisiol, E-18012 Granada, Spain. Univ Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, Mexico. Univ Granada, Inst Biotecnol, E-18071 Granada, Spain. RP Soler-Diaz, A, Univ Madrid, Fac Med, Dept Fisiol, Avda Madrid 13, E-18012 Granada, Spain. EM agasoler@ugr.es NR 36 TC 1 PU FRONTIERS IN BIOSCIENCE INC PI MANHASSET PA C/O NORTH SHORE UNIV HOSPITAL, BIOMEDICAL RESEARCH CENTER, 350 COMMUNITY DR, MANHASSET, NY 11030 USA SN 1093-9946 J9 FRONT BIOSCI JI Front. Biosci. PD MAY 1 PY 2005 VL 10 BP 1693 EP 1706 PG 14 SC Biochemistry & Molecular Biology; Cell Biology GA 970OP UT ISI:000232319800060 ER PT J AU Hjorth, J Watson, D Fynbo, JPU Price, PA Jensen, BL Jorgensen, UG Kubas, D Gorosabel, J Jakobsson, P Sollerman, J Pedersen, K Kouveliotou, C TI The optical afterglow of the short gamma-ray burst GRB 050709 SO NATURE LA English DT Article ID 28 FEBRUARY 1997; HOST GALAXIES; ERROR BOX; SUPERNOVA; PROGENITORS; CONSTRAINTS; DISCOVERY; PROSPECTS; SPECTRA; MODEL AB It has long been known that there are two classes(1) of gamma-ray bursts (GRBs), mainly distinguished by their durations. The breakthrough in our understanding of long-duration GRBs ( those lasting more than similar to 2 s), which ultimately linked them with energetic type Ic supernovae(2-4), came from the discovery of their long-lived X-ray(5) and optical(6,7) 'afterglows', when precise and rapid localizations of the sources could finally be obtained. X-ray localizations have recently become available(8,9) for short ( duration < 2 s) GRBs, which have evaded optical detection for more than 30 years. Here we report the first discovery of transient optical emission (R-band magnitude similar to 23) associated with a short burst: GRB 050709. The optical afterglow was localized with subarcsecond accuracy, and lies in the outskirts of a blue dwarf galaxy. The optical and X-ray(10) afterglow properties 34 h after the GRB are reminiscent of the afterglows of long GRBs, which are attributable to synchrotron emission from ultrarelativistic ejecta. We did not, however, detect a supernova, as found in most nearby long GRB afterglows, which suggests a different origin for the short GRBs. C1 Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. European So Observ, Santiago 19, Chile. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Stockholm Univ, Dept Astron, S-10691 Stockholm, Sweden. NASA, George C Marshall Space Flight Ctr, Natl Space Sci Technol Ctr, Huntsville, AL 35805 USA. RP Hjorth, J, Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej, DK-2100 Copenhagen, Denmark. EM jens@astro.ku.dk NR 26 TC 88 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD OCT 6 PY 2005 VL 437 IS 7060 BP 859 EP 861 DI 10.1038/nature04174 PG 3 SC Multidisciplinary Sciences GA 970VB UT ISI:000232338600040 ER PT J AU Starling, RLC Vreeswijk, PM Ellison, SL Rol, E Wiersema, K Levan, AJ Tanvir, NR Wijers, RAMJ Tadhunter, C Zaurin, JR Delgado, RMG Kouveliotou, C TI Gas and dust properties in the afterglow spectra of GRB 050730 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : distances and redshifts; cosmology : observations ID LUMINOSITY-METALLICITY RELATION; STAR-FORMING GALAXIES; BURST HOST GALAXIES; HIGH COLUMN DENSITY; SUBMILLIMETER; SPECTROSCOPY; GRB-021004; EMISSION; FIELD; JET AB We present early WHT ISIS optical spectroscopy of the afterglow of gamma-ray burst GRB050730. The spectrum shows a DLA system with the highest measured hydrogen column to date: N(H I) = 22.1 +/- 0.1 at the third-highest GRB redshift z = 3.968. Our analysis of the Swift XRT X-ray observations of the early afterglow show X-ray flares accompanied by decreasing X-ray absorption. From both the optical and the X-ray spectra we constrain the dust and gas properties of the host galaxy. We find the host to be a low metallicity galaxy, with low dust content. Much of the X-ray absorbing gas is situated close to the GRB, whilst the H I absorption causing the DLA is most likely located further out. C1 Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. European So Observ, Santiago 19, Chile. Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. NASA, George C Marshall Space Flight Ctr, NSSTC, Huntsville, AL 35805 USA. RP Starling, RLC, Univ Amsterdam, Astron Inst Anton Pannekoek, Kruislaan 403, NL-1098 SJ Amsterdam, Netherlands. EM starling@science.uva.nl NR 40 TC 29 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2005 VL 442 IS 2 BP L21 EP U6 DI 10.1051/0004-6361:200500181 PG 6 SC Astronomy & Astrophysics GA 971SH UT ISI:000232404400005 ER PT J AU Meech, KJ Ageorges, N A'Hearn, MF Arpigny, C Ates, A Aycock, J Bagnulo, S Bailey, J Barber, R Barrera, L Barrena, R Bauer, JM Belton, MJS Bensch, F Bhattacharya, B Biver, N Blake, G Bocklee-Morvan, D Boehnhardt, H Bonev, BP Bonev, T Buie, MW Burton, MG Butner, HM Cabanac, R Campbell, R Campins, H Capria, MT Carroll, T Chaffee, F Charnley, SB Cleis, R Coates, A Cochran, A Colom, P Conrad, A Coulson, IM Crovisier, J deBuizer, J Dekany, R de Leon, J Dello Russo, N Delsanti, A DiSanti, M Drummond, J Dundon, L Etzel, PB Farnham, TL Feldman, P Fernandez, YR Filipovic, MD Fisher, S Fitzsimmons, A Fong, D Fugate, R Fujiwara, H Fujiyoshi, T Furusho, R Fuse, T Gibb, E Groussin, O Gulkis, S Gurwell, M Hadamcik, H Hainaut, O Harker, D Harrington, D Harwit, M Hasegawa, S Hergenrother, CW Hirst, P Hodapp, K Honda, M Howell, ES Hutsemekers, D Iono, D Ip, WH Jackson, W Jehin, E Jiang, ZJ Jones, GH Jones, PA Kadono, T Kamath, UW Kaufl, HU Kasuga, T Kawakita, H Kelley, MS Kerber, F Kidger, M Kinoshita, D Knight, M Lara, L Larson, SM Lederer, S Lee, CF Levasseur-Regourd, AC Li, JY Li, QS Licandro, J Lin, ZY Lisse, CM LoCurto, G Lovell, AJ Lowry, SC Lyke, J Lynch, D Ma, J Magee-Sauer, K Maheswar, G Manfroid, J Marco, O Martin, P Melnick, G Miller, S Miyata, T Moriarty-Schieven, GH Moskovitz, N Mueller, BEA Mumma, MJ Muneer, S Neufeld, DA Ootsubo, T Osip, D Pandea, SK Pantin, E Paterno-Mahler, R Patten, B Penprase, BE Peck, A Petitas, G Pinilla-Alonso, N Pittichova, J Pompei, E Prabhu, TP Qi, C Rao, R Rauer, H Reitsema, H Rodgers, SD Rodriguez, P Ruane, R Ruch, G Rujopakarn, W Sahu, DK Sako, S Sakon, I Samarasinha, N Sarkissian, JM Saviane, I Schirmer, M Schultz, P Schulz, R Seitzer, P Sekiguchi, T Selman, F Serra-Ricart, M Sharp, R Snell, RL Snodgrass, C Stallard, T Stecklein, G Sterken, C Stuwe, JA Sugita, S Sumner, M Suntzeff, N Swaters, R Takakuwa, S Takata, N Thomas-Osip, J Thompson, E Tokunaga, AT Tozzi, GP Tran, H Troy, M Trujillo, C Van Cleve, J Vasundhara, R Vazquez, R Vilas, F Villanueva, G von Braun, K Vora, P Wainscoat, RJ Walsh, K Watanabe, J Weaver, HA Weaver, W Weiler, M Weissman, PR Welsh, WF Wilner, D Wolk, S Womack, M Wooden, D Woodney, LM Woodward, C Wu, ZY Wu, JH Yamashita, T Yang, B Yang, YB Yokogawa, S Zook, AC Zauderer, A Zhao, X Zhou, X Zucconi, JM TI Deep Impact: Observations from a worldwide Earth-based campaign SO SCIENCE LA English DT Article ID COMET-9P/TEMPEL-1 AB On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempet 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics. C1 Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA. European So Observ, Santiago 19, Chile. Univ Maryland, College Pk, MD 20742 USA. Univ Liege, B-4000 Liege, Belgium. Pomona Coll, Claremont, CA 91711 USA. Keck Observ, Kamuela, HI 96743 USA. Macquarie Univ, Australian Ctr Astrobiol, Sydney, NSW 2109, Australia. Univ Coll London, London WC1E 6BT, England. Univ Metropolitana Ciencias Educ, Santiago, Chile. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. NASA, Jet Prop Lab, Pasadena, CA 91109 USA. Belton Space Initiat, Tucson, AZ 85716 USA. Univ Bonn, Inst Radioastron, D-53121 Bonn, Germany. CALTECH, Pasadena, CA 91125 USA. Observ Paris, F-92195 Meudon, France. Max Planck Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany. Univ Toledo, Toledo, OH 43606 USA. Inst Astron, Sofia 1784, Bulgaria. Lowell Observ, Flagstaff, AZ 86001 USA. Univ New S Wales, Sydney, NSW 2052, Australia. Joint Astron Ctr, Hilo, HI 96720 USA. Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA. Univ Cent Florida, Orlando, FL 32816 USA. Inst Astrofis Spaziale & Fis Cosm, I-00133 Rome, Italy. NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. USAF, Res Lab, Kirtland AFB, NM 87117 USA. Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England. Univ Texas, Austin, TX 78712 USA. Gemini Observ, Serena, Chile. Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20770 USA. San Diego State Univ, San Diego, CA 92182 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Western Sydney, Sydney, NSW 1797, Australia. Gemini Observ N, Hilo, HI 96720 USA. Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Univ Tokyo, Tokyo 1138654, Japan. Subaru Telescope, Hilo, HI 96720 USA. Waseda Univ, Tokyo 1698050, Japan. Univ Notre Dame, Notre Dame, IN 46556 USA. CNRS, Serv Aeron, F-91371 Verrieres Le Buisson, France. Univ Calif San Diego, La Jolla, CA 92093 USA. Cornell Univ, Ithaca, NY 14853 USA. Inst Space & Astronaut Sci, Kanagawa 2298510, Japan. Univ Arizona, Tucson, AZ 85721 USA. Arecibo Observ, Arecibo, PR 00612 USA. Natl Cent Univ, Taoyuan 32001, Taiwan. Univ Calif Davis, Davis, CA 95616 USA. Natl Astron Observ, Beijing 100012, Peoples R China. Australian Telescope, Natl Facil, Epping, NSW 1710, Australia. Japan Agcy Marine Earth Sci & Technol, Kanagawa 2370061, Japan. Indian Inst Astrophys, Bangalore 560034, Karnataka, India. Natl Astron Observ Japan, Tokyo 1818588, Japan. Kyoto Sangyo Univ, Kyoto 6038555, Japan. Univ Minnesota, Minneapolis, MN 55455 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Calif State Univ San Bernardino, San Bernardino, CA 92407 USA. Isaac Newton Grp Telescopes, E-38700 La Palma, Spain. Agnes Scott Coll, Decatur, GA 30030 USA. Aerosp Corp, Los Angeles, CA 90009 USA. Rowan Univ, Glassboro, NJ 08028 USA. Natl Opt Astron Observ, Tucson, AZ 85719 USA. Nagoya Univ, Nagoya, Aichi 4648601, Japan. Las Campanas Observ, Pasadena, CA 91101 USA. CEA, Serv Astron, F-91191 Gif Sur Yvette, France. Fdn Galileo Galilei & Telescopio Nazl Galileo, La Palma 38700, Spain. Deutsch Zentrum Luft & Raumfahrt, D-12489 Berlin, Germany. Ball Aerosp, Boulder, CO 80306 USA. European Space Agcy, Madrid 28080, Spain. Univ Michigan, Ann Arbor, MI 48109 USA. Brown Univ, Providence, RI 02912 USA. European Space Agcy, NL-2200 AG Noordwijk, Netherlands. Anglo Australian Observ, Epping, NSW 1710, Australia. Univ Massachusetts, Amherst, MA 01003 USA. Univ Brussels, B-1050 Brussels, Belgium. Leiden Observ, NL-2300 RA Leiden, Netherlands. Osserv Astrofis Arcetri, I-50125 Florence, Italy. Univ Nacl Autonoma Mexico, Ensenada 22800, Baja California, Mexico. NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA. Carnegie Inst Washington, Washington, DC 20015 USA. Coll William & Mary, Williamsburg, VA 23187 USA. St Cloud State Univ, St Cloud, MN 56301 USA. Observ Besancon, F-25010 Besancon, France. RP Meech, KJ, Univ Hawaii Manoa, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA. EM meech@ifa.hawaii.edu NR 15 TC 57 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD OCT 14 PY 2005 VL 310 IS 5746 BP 265 EP 269 DI 10.1126/science.1118978 PG 5 SC Multidisciplinary Sciences GA 975NV UT ISI:000232670100038 ER PT J AU Tagliaferri, G Antonelli, LA Chincarini, G Fernandez-Soto, A Malesani, D Della Valle, M D'Avanzo, P Grazian, A Testa, V Campana, S Covino, S Fiore, F Stella, L Castro-Tirado, AJ Gorosabel, J Burrows, DN Capalbi, M Cusumano, G Conciatore, ML D'Elia, V Filliatre, P Fugazza, D Gehrels, N Guetta, D Guziy, S Held, EV Hurley, K Israel, GL Jelinek, M Lazzati, D Lopez-Echarri, A Melandri, A Mirabel, IF Moles, M Moretti, A Mason, KO Nousek, J Osborne, J Pellizza, LJ Perna, R Piranomonte, S Piro, L Postigo, AD Romano, P TI GRB050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE cosmology : observations; early Universe; gamma rays : bursts; gamma rays : individual : GRB 050904 ID GAMMA-RAY BURST; PHOTOMETRIC REDSHIFTS; SUPERNOVA; GALAXIES; UNIVERSE; SPECTRA; REIONIZATION; METALLICITY; PARAMETERS; DENSITY AB We present optical and near-infrared observations of the afterglow of the gamma-ray burst GRB050904. We derive a photometric redshift z = 6.3, estimated from the presence of the Lyman break falling between the I and J filters. This is by far the most distant GRB known to date. Its isotropic-equivalent energy is 3.4 x 10(53) erg in the rest- frame 110 110- 1100 keV energy band. Despite the high redshift, both the prompt and the afterglow emission are not peculiar with respect to other GRBs. We find a break in the J-band light curve at - t(b) = 2.6 +/- 1.0 d ( observer frame). If we assume this is the jet break, we derive a beaming-corrected energy E-gamma similar to (4 divided by 12) x 10(51) erg. This limit shows that GRB050904 is consistent with the Amati and Ghirlanda relations. This detection is consistent with the expected number of GRBs at z > 6 and shows that GRBs are a powerful tool to study the star formation history up to very high redshift. C1 INAF, Osservatorio Astron Brera, I-23807 Merate, Lc, Italy. INAF, Osservatorio Astron Roma, I-00040 Rome, Italy. Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy. Univ Valencia, Astron Observ, Valencia 46071, Spain. ISAS, SISSA, I-34014 Trieste, Italy. INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy. Univ Insubria, Dipartimento Matemat & Fis, I-22100 Como, Italy. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. ASI Sci Data Ctr, I-00044 Frascati, Roma, Italy. INAF, IASF, Sez Palermo, I-90146 Palermo, Italy. Lab Astroparticule & Cosmol, UMR 7164, F-75231 Paris, France. CEA Saclay, DAPNIA, DSM, Serv Astrophys, F-91911 Gif Sur Yvette, France. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. INAF, Osservatorio Astron Padova, I-35122 Padua, Italy. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. Inst Astrofis Canarias, Tenerife 38200, Spain. Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Ca, Italy. European So Observ Vitacura, Santiago 19, Chile. Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England. Univ Leicester, Dept Phys & Astron, Xray & Observat Astron Grp, Leicester LE1 7RH, Leics, England. Univ Paris 07, CEA Saclay, Serv Astrophys, AIM,CNRS,UMR 7158, F-91191 Gif Sur Yvette, France. INAF, IASF, Sez Roma, I-00133 Rome, Italy. RP Tagliaferri, G, INAF, Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, Lc, Italy. EM tagliaferri@merate.mi.astro.it NR 54 TC 51 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2005 VL 443 IS 1 BP L1 EP L5 DI 10.1051/0004-6361:200500196 PG 5 SC Astronomy & Astrophysics GA 976JP UT ISI:000232730000001 ER PT J AU Paunzen, E Netopil, M Iliev, IK Maitzen, HM Claret, A Pintado, OI TI CCD photometric search for peculiar stars in open clusters - VI. NGC 1502, NGC 3105, Stock 16, NGC 6268, NGC 7235 and NGC 7510 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : chemically peculiar; stars : early-type; techniques : photometric; Galaxy : globular clusters : general ID MAIN-SEQUENCE STARS; CHEMICALLY PECULIAR; BETA-PHOTOMETRY; MASS FUNCTION; MELOTTE-105; NGC-2169; UVBY AB In a sample of six young open clusters (NGC 1502, NGC 3105, Stock 16, NGC 6268, NGC 7235, and NGC 7510) we investigated 1753 objects using the narrow band, three filter. a photometric system resulting in the detection of eleven bona-fide magnetic chemically peculiar (CP) stars and five Be or metal-weak stars. The results for the distant cluster NGC 3105 is most important because of the still unknown influence of the global metallicity gradient of the Milky Way. These findings confirm that CP stars are present in open clusters of very young ages ( log t >= 6.90) at galactocentric distances up to 11.4 kpc. For all programme clusters the age, reddening, and distance modulus were derived using the corresponding isochrones. Some additional variable stars within Stock 16 could be identified by comparing different photometric studies. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Natl Astron Observ, Inst Astron, Smoljan 4700, Bulgaria. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Tucuman, Fac Ciencias Exactas & Tecnol, Dept Fis, RA-4000 San Miguel De Tucuman, Tucuman, Argentina. Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina. RP Paunzen, E, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM ernst.paunzen@univie.ac.at NR 34 TC 5 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2005 VL 443 IS 1 BP 157 EP 162 DI 10.1051/0004-6361:20053287 PG 6 SC Astronomy & Astrophysics GA 976JP UT ISI:000232730000016 ER PT J AU Suarez, JC Moya, A Martin-Ruiz, S Amado, PJ Grigahcene, A Garrido, R TI Frequency ratio method for seismic modelling of gamma Doradus stars - II. The role of rotation SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : rotation; stars : oscillations; stars : fundamental parameters; stars : evolution; stars : individual : HD48501; stars : general ID DELTA-SCUTI STARS; APPROXIMATIONS; OSCILLATIONS; PARAMETERS; PHOTOMETRY; CATALOG; MODES AB The effect of rotation on the Frequency Ratio Method (Moya et al. 2005, A&A, 432, 189) is examined. Its applicability to observed frequencies of rotating gamma Doradus stars is discussed taking into account the following aspects: the use of a perturbative approach to compute adiabatic oscillation frequencies; the effect of rotation on the observational Brunt-Vaisala integral determination and finally, the problem of disentangling multiplet-like structures from frequency patterns due to the period spacing expected for high-order gravity modes in asymptotic regime. This analysis reveals that the FRM produces reliable results for objects with rotational velocities up to 70 km s(-1), for which the FRM intrinsic error increases one order of magnitude with respect to the typical FRM errors given in Moya et al. (2005, A&A, 432, 189). Our computations suggest that, given the spherical degree l identification, the FRM may be discriminating for m = 0 modes, in the sense that the method avoids any misinterpretation induced by the presence of rotationally split multiplet-like structures, which reinforces the robustness of the method. However, if l is unknown, such discrimination is not ensured. In order to check the FRM in presence of slow-moderate rotation, we have applied it to the three observed frequencies of the slowly rotating (v sin i = 29 km s(-1)). Doradus star HD 48501. C1 CSIC, Inst Astrofis Andalucia, Granada, Spain. Observ Paris, LESIA, UMR 8109, Meudon, France. European So Observ, Off Santiago, Santiago 19, Chile. RP Suarez, JC, CSIC, Inst Astrofis Andalucia, CP3004, Granada, Spain. EM jcsuarez@iaa.es NR 22 TC 7 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2005 VL 443 IS 1 BP 271 EP 282 DI 10.1051/0004-6361:20053114 PG 12 SC Astronomy & Astrophysics GA 976JP UT ISI:000232730000027 ER PT J AU Ponce, C Ponce, E Vinelli, E Montoya, A de Aguilar, V Gonzalez, A Zingales, B Rangel-Aldao, R Levin, MJ Esfandiari, J Umezawa, ES Luquetti, AO da Silveira, JF TI Validation of a rapid and reliable test for diagnosis of Chagas' disease by detection of Trypanosoma cruzi-specific antibodies in blood of donors and patients in Central America SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID RECOMBINANT; ANTIGENS; IMMUNOASSAY; ASSAY AB In this study we compared the performance of the Chagas Stat-Pak rapid immunochromatographic test with a standard enzyme-linked immunosorbent assay (ELISA) in the serodiagnosis of Chagas' disease in Central America. Out of 3,400 blood donor samples, 156 (4.6%) were positive in both assays. Three sera out of 2,084 samples from reference laboratories were negative with the rapid test but positive with the ELISA (99.8% agreement). Agreement of 100% between the two tests was observed with 339 additional sera from patients with cardiopathies and 175 sera from potential blood donors in emergency surgical cases occurring on weekends or at night. In conclusion, Chagas Stat-Pak showed 99.6% and 99.9% sensitivity and specificity, respectively, when assayed with 5,998 serum samples. It is a sensitive and specific alternative to the ELISA, as required in medical emergencies and blood screenings in Central America. C1 Univ Fed Sao Paulo, Escola Paulista Med, Dept Microbiol Immunol & Parasitol, BR-04023062 Sao Paulo, Brazil. Secretaria Salud, Lab Cent Referencia Enfermedad Chagas & Leishmani, Tegucigalpa, Honduras. Cruz Roja Hondurena, Tegucigalpa, Honduras. Minist Salud, Ctr Nacl Diagnost & Referencia, Managua, Nicaragua. Minist Salud Publ & Asistencia Social, Cent Lab, San Salvador, El Salvador. CSIC, Inst Parasitol & Biomed, Granada, Spain. Univ Sao Paulo, Inst Quim, Dept Bioquim, BR-01498 Sao Paulo, Brazil. Univ Simon Bolivar, Dept Biol Celular, Caracas, Venezuela. Inst Invest Engn Genet & Biol Mol, INGEBI, Buenos Aires, DF, Argentina. Chembio Diagnost Syst Inc, Medford, NY USA. Univ Sao Paulo, Inst Med Trop Sao Paulo, Sao Paulo, Brazil. Univ Fed Goias, Inst Patol Trop & Saude Publ, Goiania, Go, Brazil. Univ Fed Goias, Fac Med, Goiania, Go, Brazil. RP da Silveira, JF, Univ Fed Sao Paulo, Escola Paulista Med, Dept Microbiol Immunol & Parasitol, Rua Botucatu 862, BR-04023062 Sao Paulo, Brazil. EM franco@ccb.epm.br NR 14 TC 7 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD OCT PY 2005 VL 43 IS 10 BP 5065 EP 5068 DI 10.1128/JCM.43.10.5065-5068.2005 PG 4 SC Microbiology GA 976VV UT ISI:000232762500020 ER PT J AU Perez-Mendoza, D Sepulveda, E Pando, V Munoz, S Nogales, J Olivares, J Soto, MJ Herrera-Cervera, JA Romero, D Brom, S Sanjuan, J TI Identification of the rctA gene, which is required for repression of conjugative transfer of rhizobial symbiotic megaplasmids SO JOURNAL OF BACTERIOLOGY LA English DT Article ID AGROBACTERIUM-TUMEFACIENS; PLASMID TRANSFER; SINORHIZOBIUM-MELILOTI; PHASEOLUS-VULGARIS; ETLI CFN42; CRYSTAL-STRUCTURE; BACTERIUM BNC1; LEGUMINOSARUM; NODULATION; PROTEIN AB An analysis of the conjugative transfer of pRetCFN42d, the symbiotic plasmid (pSym) of Rhizobium edi, has revealed a novel gene, rctA, as an essential element of a regulatory system for silencing the conjugative transfer of R. edi pSym by repressing the transcription of conjugal transfer genes in standard laboratory media. The rctA gene product lacks sequence conservation with other proteins of known function but may belong to the winged-helix DNA-binding subfamily of transcriptional regulators. Similar to that of many transcriptional repressors, rctA transcription seems to be positively autoregulated. rctA expression is greatly reduced upon overexpression of another gene, rctB, previously identified as a putative activator of R. edi pSym conjugal transfer. Thus, rctB seems to counteract the repressive action of rctA. rctA homologs are present in at least three other bacterial genomes within the order Rhizobiales, where they are invariably located adjacent to and divergently transcribed from putative virB-like operons. We show that similar to that of R. edi pSym, conjugative transfer of the 1.35-Mb symbiotic megaplasmid A of Sinorhizobium meliloti is also subjected to the inhibitory action of rctA. Our data provide strong evidence that the R. edi and S. meliloti pSym plasmids are indeed self-conjugative plasmids and that this property would only be expressed under optimal, as yet unknown conditions that entail inactivation of the rctA function. The rctA gene seems to represent novel but probably widespread regulatory systems controlling the transfer of conjugative elements within the order Rhizobiales. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suela & Sistemas Simbioticos, E-18008 Granada, Spain. UNAM, Ctr Ciencias Genom, Programa Ingn Genom, Cuernavaca, Morelos, Mexico. RP Sanjuan, J, CSIC, Estac Expt Zaidin, Dept Microbiol Suela & Sistemas Simbioticos, Profesor Albareda 1, E-18008 Granada, Spain. EM juan.sanjuan@eez.csic.es NR 63 TC 7 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD NOV PY 2005 VL 187 IS 21 BP 7341 EP 7350 DI 10.1128/JB.187.21.7341-7350.2005 PG 10 SC Microbiology GA 977EV UT ISI:000232786100019 ER PT J AU Conselice, CJ Vreeswijk, PM Fruchter, AS Levan, A Kouveliotou, C Fynbo, JPU Gorosabel, J Tanvir, NR Thorsett, SE TI Gamma-ray burst-selected high-redshift galaxies: Comparison to field galaxy populations to z similar to 3 SO ASTROPHYSICAL JOURNAL LA English DT Article DE early universe; galaxies : ISM; gamma rays : observations; quasars : absorption lines ID HUBBLE-SPACE-TELESCOPE; HIGH COLUMN DENSITY; ORIGINS DEEP SURVEY; HOST GALAXY; STAR-FORMATION; STARBURST GALAXIES; OPTICAL COUNTERPART; PHYSICAL MORPHOLOGY; KECK SPECTROSCOPY; NEARBY GALAXIES AB We study the internal structural properties of 37 long-duration gamma-ray burst (GRB) host galaxies imaged with the Hubble Space Telescope (HST). Our goal is to gain insights in the types of galaxies that give rise to GRBs and the relationship of GRB hosts to high-redshift galaxies selected through more traditional photometric methods. We measure structural properties of our sample from HST observations obtained after the GRB afterglow faded. Fitting exponential disk (typical for spirals) and r(1/4) (typical for ellipticals) models to the surface brightness profiles of eight z < 1.2 bright host galaxies, we find that the disk model is slightly preferred for most hosts, although two galaxies are fit best with an r(1/4) profile. We furthermore measure the central concentrations and asymmetries of all 37 host galaxies using the CAS (concentration, asymmetry, clumpiness) system and compare with values for galaxies in the Hubble Deep Field and systems present on the GRB host images. Our first main conclusion is that GRB hosts exhibit a surprisingly broad diversity of galaxy types. A significant fraction (68%) of host galaxies are situated in a region of the concentration-asymmetry diagram occupied by spirals or peculiar/merging galaxies. Twelve hosts (32%) are situated in the region occupied by elliptical galaxies, having high concentration indices indicative of early types or early types in formation. These results show that GRB host galaxies are not a single morphological type but span the available range of galaxy types seen at high redshift. We also find some evidence for evolution in GRB host galaxy morphology, such that hosts at z > 1 have a relatively high light concentration, indicating that these systems are perhaps progenitors of massive galaxies, or are compact blue star-forming galaxies. We find that GRB hosts at z > 1 are different from the general field population at z > 1 in terms of light concentration, at > 99.5% confidence, yet have sizes similar to the general z > 1 population. This is the opposite of the effect at z < 1, where GRB hosts are smaller than average. We argue that GRB hosts trace the starburst population at high redshift, as similarly concentrated galaxies at z > 2 are undergoing a disproportionate amount of star formation for their luminosities. Furthermore, our results show that GRBs are not only an effective tracer of star formation but are perhaps ideal tracers of typical galaxies undergoing star formation at any epoch, making them perhaps our best hope of locating the earliest galaxies at z > 7. C1 CALTECH, Pasadena, CA 91125 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands. European So Observ, Santiago 19, Chile. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. NASA, George C Marshall Space Flight Ctr, Natl Space Sci Technol Ctr, Huntsville, AL 35805 USA. Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. CSIC, IAA, E-18008 Granada, Spain. Univ Hertfordshire, Ctr Astrophys, Hatfield AL10 9AB, Herts, England. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. RP Conselice, CJ, CALTECH, Mail Code 105-24, Pasadena, CA 91125 USA. EM cc@astro.caltech.edu fruchter@stsci.edu NR 94 TC 22 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 2005 VL 633 IS 1 PN Part 1 BP 29 EP 40 PG 12 SC Astronomy & Astrophysics GA 977VV UT ISI:000232832500004 ER PT J AU Fynbo, JPU Gorosabel, J Smette, A Fruchter, A Hjorth, J Pedersen, K Levan, A Burud, I Sahu, K Vreeswijk, PM Bergeron, E Kouveliotou, C Tanvir, N Thorsett, SE Wijers, RAMJ Ceron, JMC Castro-Tirado, AC Garnavich, P Holland, ST Jakobsson, P Moller, P Nugent, P Pian, E Rhoads, J Thomsen, B Watson, D Woosley, S TI On the afterglow and host galaxy of GRB 021004: A comprehensive study with the Hubble space telescope SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; gamma rays : bursts ID GAMMA-RAY BURST; LYMAN-ALPHA EMISSION; HIGH COLUMN DENSITY; STAR-FORMATION; HIGH-REDSHIFT; OPTICAL AFTERGLOW; LOW METALLICITY; LIGHT CURVES; DUST; POLARIZATION AB We report on Hubble Space Telescope (HST) observations of the late-time afterglow and host galaxy of GRB 021004 (z = 2.33). Although this gamma- ray burst (GRB) is one of the best observed so far in terms of sampling in the time domain, multiwavelength coverage, and polarimetric observations, there is substantial disagreement between different interpretations of data sets on this burst in the literature. We have observed the field of GRB 021004 with the HST at multiple epochs from 3 days until almost 10 months after the burst. With the STIS PRISM and G430L spectroscopy, we cover the spectral region from about 2000 to 5700 angstrom, corresponding to 600-1700 angstrom in the rest frame. From the limit on the flux recovery blueward of the Lyman limit, we constrain the H I column density to be above 1 x 10(18) cm(-2) (5 sigma). On the basis of ACS and NICMOS imaging, we find that the afterglow evolved achromatically within the errors (any variation must be less than 5%) during the period of the HST observations. The color changes observed by other authors during the first 4 days must be related to a stochastic phenomenon superimposed on an afterglow component with a constant spectral shape. This achromaticity implies that the cooling break has remained on the blue side of the optical part of the spectrum for at least 2 weeks after the explosion. The optical-to-X-ray slope beta(OX) is consistent with being the same at 1.4 and 52.4 days after the burst. This indicates that the cooling frequency is constant and, hence, according to fireball models, that the circumburst medium has a constant density profile. The late-time slope of the light curve (alpha(2), F-v proportional to t(-alpha 2)) is in the range alpha(2) = 1.8-1.9 and is inconsistent with a single power law. This could be due to a late-time flattening caused by the transition to nonrelativistic expansion or could be due to excess emission (a "bump" in the light curve) about 7 days after the burst. The host galaxy is, like most previously studied GRB hosts, a (very) blue starburst galaxy with no evidence for dust and with strong Ly alpha emission. The star formation rate of the host is about 10 M-circle dot yr(-1) on the basis of both the strength of the UV continuum and the Ly alpha luminosity. The spectral energy distribution of the host implies an age in the range 30-100 Myr for the dominant stellar population. The afterglow was located very close (similar to 100 pc) to the center of the host, implying that the progenitor was possibly associated with a circumnuclear starburst. C1 Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, IAA, E-11080 Granada, Spain. European So Observ, Santiago, Chile. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. NASA, Marshall Space Flight Ctr, Natl Space Sci & Technol Ctr, Huntsville, AL 35805 USA. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. NSSTC, Univ Space Res Assoc, Huntsville, AL 35805 USA. Univ Amsterdam, Inst Astron, NL-1098 SJ Amsterdam, Netherlands. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. European So Observ, D-85748 Munich, Germany. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Osserv Astron Trieste, I-34131 Trieste, Italy. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, Denmark. RP Fynbo, JPU, Univ Copenhagen, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. NR 75 TC 7 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 2005 VL 633 IS 1 PN Part 1 BP 317 EP 327 PG 11 SC Astronomy & Astrophysics GA 977VV UT ISI:000232832500030 ER PT J AU Vinuesa, P Silva, C Lorite, MJ Izaguirre-Mayoral, ML Bedmar, EJ Martinez-Romero, E TI Molecular systematics of rhizobia based on maximum likelihood and Bayesian phylogenies inferred from rrs, atpD, recA and nifH sequences, and their use in the classification of Sesbania microsymbionts from Venezuelan wetlands SO SYSTEMATIC AND APPLIED MICROBIOLOGY LA English DT Article DE Bayesian phylogenetics; maximum likelihood; Mesorhizobium plurifarium; Rhizobium huautlense; Sesbania; nitrogenfixation; plasmids; molecular systematics; recombination ID GENOTYPIC CHARACTERIZATION; CANARY-ISLANDS; 16S RDNA; BRADYRHIZOBIUM; MESORHIZOBIUM; RECOMBINATION; INFERENCE; STRAINS; LEGUMES; IDENTIFICATION AB A well-resolved rhizobial species phylogeny with 51 haplotypes was inferred from a combined atpD + recA data set using Bayesian inference with best-fit, gene-specific substitution models. Relatively dense taxon sampling for the genera Rhizobium and Mesorhizobium was achieved by generating atpD and recA sequences for six type and 24 reference strains not previously available in GenBank. This phylogeny was used to classify nine nodule isolates from Sesbania exasperata, S. punicea and S. sericea plants native to seasonally flooded areas of Venezuela, and compared with a PCR-RFLP analysis of rrs plus rrl genes and large maximum likelihood rrs and nifH phylogenies. We show that rrs phylogenies are particularly sensitive to strain choice due to the high levels of sequence mosaicism found at this locus. All analyses consistently identified the Sesbania isolates as Mesorhizobium plurifarium or Rhizobium huautlense. Host range experiments on ten legume species coupled with plasmid profiling uncovered potential novel biovarieties of both species. This study demonstrates the wide geographic and environmental distribution of M. plurifarium, that R. galegae and R. huautlense are sister lineages, and the synonymy of R. gallicum, R. mongolense and R. yanglingense. Complex and diverse phylogeographic, inheritance and host-association patterns were found for the symbiotic nifH locus. The results and the analytical approaches used herein are discussed in the context of rhizobial taxonomy and molecular systematics. (c) 2005 Elsevier GmbH. All rights reserved. C1 UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico. CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Granada, Spain. Inst Venezolano Invest Cient, Ctr Microbiol & Biol Celular, Lab Biotecnol & Virol Vegetal, Caracas, Venezuela. RP Vinuesa, P, UNAM, Ctr Ciencias Genom, Apdo 565A, Cuernavaca, Morelos, Mexico. EM vinuesa@ccg.unam.mx NR 56 TC 13 PU URBAN & FISCHER VERLAG PI JENA PA BRANCH OFFICE JENA, P O BOX 100537, D-07705 JENA, GERMANY SN 0723-2020 J9 SYST APPL MICROBIOL JI Syst. Appl. Microbiol. PD OCT PY 2005 VL 28 IS 8 BP 702 EP 716 DI 10.1016/j.syapm.2005.05.007 PG 15 SC Biotechnology & Applied Microbiology; Microbiology GA 978NN UT ISI:000232880400006 ER PT J AU Gomez, LM Anaya, JM Gonzalez, CI Pineda-Tamayo, R Otero, W Arango, A Martin, J TI PTPN22 C1858T polymorphism in Colombian patients with autoimmune diseases SO GENES AND IMMUNITY LA English DT Article DE PTPN22; Sjogren's syndrome; rheumatoid arthritis; systemic lupus erythematosus; diabetes mellitus; Colombia ID PROTEIN-TYROSINE-PHOSPHATASE; SYSTEMIC-LUPUS-ERYTHEMATOSUS; SINGLE-NUCLEOTIDE POLYMORPHISM; CELL SIGNALING ABNORMALITIES; PRIMARY SJOGRENS-SYNDROME; RHEUMATOID-ARTHRITIS; GENETIC ASSOCIATION; SUSCEPTIBILITY GENES; R620W POLYMORPHISM; FAMILIES AB A functional single nucleotide polymorphism (SNP) C1858T in the protein tyrosine phosphatase nonreceptor 22 ( PTPN22) gene encoding an intracellular phosphatase with negative regulatory effects on T-cell activation is associated with some autoimmune diseases in Caucasians. Taking into account firstly, that SNP frequencies may vary across populations and, secondly, that replication studies are important to confirm previous associations, we examined the influence of PTPN22 polymorphism in 621 Colombian patients with four autoimmune diseases. Accordingly, 298 patients with rheumatoid arthritis (RA), 143 with systemic lupus erythematosus (SLE), 70 with primary Sjogren's syndrome (pSS) and 110 with Type 1 diabetes (T1D) were studied. The control group consisted of 308 matched healthy individuals. Genotyping of PTPN22 was performed by the real-time polymerase chain reaction technology, using the TaqMan 50'allele discrimination assay. The 1858 T allele was found to be a risk factor for pSS (odds ratio (OR) = 2.42), SLE (OR 2.56), and T1D (OR 1.83). A lower but nonsignificant trend was observed for RA (OR = 1.26). These results confirm the influence of PTPN22 in autoimmunity and indicate that autoimmune phenotypes could represent pleiotropic outcomes of nonspecific disease genes that underlie similar immunogenetic mechanisms. C1 CSIC, Isnt Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. Univ Antioquia, Medellin, Colombia. CIB, Cellular Biol & Immunogenet Unit, Medellin, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Univ Nacl Rosario, CIB, CBIU, Medellin, Colombia. Unvi Ind Santander, Hlth Fac, Bucaramanga, Colombia. Univ Pontificia Bolivariana, Clin Univ Bolivarirana, Medellin, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. RP Martin, J, CSIC, Isnt Parasitol & Biomed Lopez Neyra, Parque Tecnol Ciencias Salud,avda Conocimiento S-, Granada 18100, Spain. EM martin@ipb.csic.es NR 34 TC 28 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1466-4879 J9 GENES IMMUN JI Genes Immun. PD OCT PY 2005 VL 6 IS 7 BP 628 EP 631 DI 10.1038/sj.gene.6364261 PG 4 SC Genetics & Heredity; Immunology GA 978OB UT ISI:000232881800009 ER PT J AU Trinidad, MA Curiel, S Migenes, V Patel, N Torrelles, JM Gomez, JF Rodriguez, LF Ho, PTP Canto, J TI Very large array simultaneous 1.3 cm continuum and H2O maser observations toward IRAS 20126+4104 SO ASTRONOMICAL JOURNAL LA English DT Article DE ISM : individual (IRAS 20126+4104); ISM : jets and outflows; masers; stars : formation ID COLD IRAS SOURCES; METHANOL MASERS; DISK; JET; OUTFLOW; SYSTEM; STAR AB We have observed simultaneously the 1.3 cm continuum and H2O maser emission toward the high-mass protostar IRAS 20126+4104 with the Very Large Array (VLA) in its A configuration, providing an angular resolution of similar or equal to 0.'' 1. We have detected an unresolved continuum source [ I20126N(1.3 cm)] nearly coinciding with the strongest peak of the northern double continuum source previously detected at 3.6 cm in the field and suggested to be a radio jet. In addition, we have detected 29 water maser spots, 21 of which are tightly grouped in a cluster of similar or equal to 0.'' 1 size displaced similar or equal to 0.'' 07 (similar or equal to 120 AU) northwest of I20126N(1.3 cm). The relative positions of the masers with respect to I20126N(1.3 cm) have been established with 10 mas of accuracy. The overall spatial distribution and line-of-sight velocity components of the water maser spots associated with I20126N( 1.3 cm) are fully consistent with those previously found by Moscadelli and collaborators through VLBI measurements and interpreted as tracing a conical outflow, with the powering source ( suggested to be traced by a one-sided radio continuum jet) located at the cone vertex. Within this very reasonable scenario, our observations would indicate that the source I20126N( 1.3 cm) is showing the position of the high-mass protostar. Analyzing the spatiokinematic distribution of the VLA water masers, we propose that their motions also show, in addition to proper motions on the order of 100 km s(-1) seen in the plane of the sky, a component of rotation with velocities on the order of 20 km s(-1). The water masers seem then to be both rotating ( as evidenced from their radial velocities) and changing their position in the plane of the sky ( from the proper motions). Within this scenario, some of the water maser spots could be within a rotating circumstellar disk of similar or equal to 170 AU size around a protostar of similar or equal to 20 M-. if it is located at the center of the water maser cluster rather than located at the position of I20126N( 1.3 cm). Then, I20126N( 1.3 cm) would trace one of the two peaks of a two-sided thermal jet, with the high-mass protostar located in between. We think that simultaneous high angular resolution and sensitive multifrequency ( from centimeter to submillimeter wavelengths) observations are the key studies to knowing both the nature of the continuum emission ( one-or two-sided jet?) and the location of the high-mass protostar, which is very relevant for modeling this important object. C1 Univ Guanajuato, Dept Astron, Guanajuato 36240, Mexico. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. INTA, Lab Astrofis Epsacial & Fis Fundamental, E-28080 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. RP Trinidad, MA, Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36240, Mexico. EM trinidad@astro.ugto.mx NR 19 TC 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD NOV PY 2005 VL 130 IS 5 BP 2206 EP 2211 PG 6 SC Astronomy & Astrophysics GA 979XI UT ISI:000232977900018 ER PT J AU Izquierdo, J Venkova-Canova, T Ramirez-Romero, MA Tellez-Sosa, J Hernandez-Lucas, I Sanjuan, J Cevallos, MA TI An antisense RNA plays a central role in the replication control of a repC plasmid SO PLASMID LA English DT Article DE plasmid incompatibility; plasmid replication; antisense RNA; repC; Sinorhizobium meliloti AB The widespread replicons of repABC and repC families from alpha-proteobacteria share high similarity in their replication initiator proteins (RepC). Here we describe the minimal region required for stable replication of a member of the repC family, the low copy-number plasmid pRmeGR4a from Sinorizobium meliloti GR4. This region contains only two genes: one encoding the initiator protein RepC (46.8 kDa) and other, an antisense RNA (67 nt). Mapping of transcriptional start sites and promoter regions of both genes showed that the antisense RNA is nested within the repC mRNA leader. The constitutively expressed countertranscribed RNA (ctRNA) forms a single stem-loop structure that acts as an intrinsic rho-independent terminator. The ctRNA is a strong trans-incompatibility factor and negative regulator of repC expression. Based on structural and functional similarities between members of the repC and repABC families we propose a model of their evolutionary relationship. (c) 2005 Elsevier Inc. All rights reserved. C1 Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Programa Genom Evolut, Cuernavaca 62191, Morelos, Mexico. Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Programa Ecol Genom, Cuernavaca 62191, Morelos, Mexico. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. RP Cevallos, MA, Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Programa Genom Evolut, Apartado Postal 565-A, Cuernavaca 62191, Morelos, Mexico. EM mac@ccg.unam.mx NR 61 TC 7 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0147-619X J9 PLASMID JI Plasmid PD NOV PY 2005 VL 54 IS 3 BP 259 EP 277 DI 10.1016/j.plasmid.2005.05.003 PG 19 SC Genetics & Heredity GA 981BK UT ISI:000233061900006 ER PT J AU Robles, C Barea, JM TI Microbial-plant symbiosis and quality of soil in a degraded Mediterranean ecosystem SO AGROCHIMICA LA Spanish DT Article ID INFECTION; ROOTS AB Rizospheric and no rhizospheric soil samples were taken in a Mediterranean degraded ecosystem corresponding to an << albaidal >> from Sierra de los Filabres (Almeria, Espana) from november 1996 to march 1998. Arbuscular mycorrhizal fungi propagules densities and nitrogen fixing bacteria (Rhizobium), associated to Anthyllis cytisoides, showed variations according with climatic stationality. Roots and its associated soil microorganisms clearly and positively affected all the biological and physicochemical analyzed parameters. This effect is indicative of the transcendental role of these microorganisms in the regeneration of degraded soils. C1 IPN Oaxaca, CHDIR, Dpto Recursos Nat, Oaxaca 71230, Mexico. CSIC, Estac Expt Zaidin, Dpto Microbiol Suelo & Sistemas Simbioticos, Granada, Spain. RP Robles, C, IPN Oaxaca, CHDIR, Dpto Recursos Nat, C Hornos 1003, Oaxaca 71230, Mexico. EM crobles@ole.com NR 12 TC 0 PU IST CHIMICA AGRARIA PI PISA 56100 PA UNIV PISA VIA S MICHELE DEGLI SCALZI, 2 PISA 56100, ITALY SN 0002-1857 J9 AGROCHIMICA JI Agrochimica PD MAY-AUG PY 2004 VL 48 IS 3-4 BP 99 EP 103 PG 5 SC Chemistry, Applied; Soil Science GA 982FF UT ISI:000233142600002 ER PT J AU Martinez-Frias, J Delgado, A Millan, M Reyes, E Rull, F Travis, D Garcia, R Lopez-Vera, F Rodriguez-Losada, JA Martin-Rubi, JA Raya, J Santoyo, E TI Oxygen and hydrogen isotopic signatures of large atmospheric ice conglomerations SO JOURNAL OF ATMOSPHERIC CHEMISTRY LA English DT Article DE hydrogen and oxygen isotopes; ice conglomeration; megacryometeors; tropopause ID WATER-VAPOR; LARGE HAILSTONES; STABLE ISOTOPES; TROPOPAUSE; GROWTH; PRECIPITATION; STRATOSPHERE; DEUTERIUM; RECORD; MODEL AB Specific studies about the stable isotope composition (O-18/O-16 and D/H) of atmospheric icy conglomerations are still scarce. The present work offers, for the first time, a very detailed analysis of oxygen and hydrogen isotopic signatures of unusually large ice conglomerations, or "megacryometeors", that fell to the ground in Spain during January 2000. The hydrochemical analysis is based on the bulk isotopic composition and systematic selective sampling ( deuterium isotopic mapping) of eleven selected specimens. delta(18)O and delta D (V-SMOW) of all samples fall into the Meteoric Water Line matching well with typical tropospheric values. The distribution of the samples on Craig's line suggests either a variation in condensation temperature and/or different residual fractions of water vapour ( Rayleigh processes). Three of the largest megacryometeors exhibited unequivocally distinctive negative values (delta(18)O = - 17.2 parts per thousand and delta D = - 127 parts per thousand V-SMOW), (delta(18)O = - 15.6 parts per thousand and delta D = - 112 parts per thousand V-SMOW) and (delta(18)O = - 14.4 parts per thousand and delta D =- 100% V-SMOW), suggesting an atmospheric origin typical of the upper troposphere. Theoretical calculations indicate that the vertical trajectory of growth was lower than 3.2 km. During the period in which the fall of megacryometeors occurred, anomalous atmospheric conditions were observed to exist: a substantial lowering of the tropopause with a deep layer of saturated air below, ozone depression and strong wind shear. Moreover, these large ice conglomerations occurred during non-thunderstorm conditions, suggesting an alternative process of ice growth was responsible for their formation. C1 CSIC, INTA, Ctr Astrobiol,NASA Astrobiol Inst, Planetary Geol Lab, Madrid 28850, Spain. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Fdn CEAM, Valencia 46980, Spain. Univ Valladolid, Fac Ciencias, Dpto Fis Mat Condensada Cristalog & Mineral, E-47005 Valladolid, Spain. Univ Wisconsin, Dept Geog & Geol, Whitewater, WI 53190 USA. CSIC, Museo Nacl Ciencias Nat, Madrid 28006, Spain. Univ Autonoma Madrid, Fac Ciencias, E-28049 Madrid, Spain. Univ La Laguna, Fac Biol, Dep Edafol & Geol, Tenerife 38206, Canarias, Spain. Labs IGME, Madrid 28760, Spain. Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico. RP Martinez-Frias, J, CSIC, INTA, Ctr Astrobiol,NASA Astrobiol Inst, Planetary Geol Lab, Ctra Ajalvir,Km 4, Madrid 28850, Spain. EM martinezfrias@mncn.csic.es NR 55 TC 2 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-7764 J9 J ATMOS CHEM JI J. Atmos. Chem. PD OCT PY 2005 VL 52 IS 2 BP 185 EP 202 DI 10.1007/s10874-005-2007-7 PG 18 SC Environmental Sciences; Meteorology & Atmospheric Sciences GA 983QS UT ISI:000233247800005 ER PT J AU Gomez, JF de Gregorio-Monsalvo, I Lovell, JEJ Anglada, G Miranda, LF Suarez, O Torrelles, JM Gomez, Y TI Spectral index of the H2O-maser-emitting planetary nebula IRAS 17347-3139 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE stars : AGB and post-AGB; planetary nebulae : general; planetary nebulae : individual; IRAS 17347-3139; radio continuum : ISM ID RADIO-CONTINUUM OBSERVATIONS; INTERMEDIATE-MASS STARS; DISTANCE SCALE; EVOLUTION; EMISSION; MASERS; ENVELOPES; CATALOG; ARRAY; H2O AB We present radio-continuum observations of the planetary nebula (PN) IRAS 17347 - 3139 (one of the only two known to harbour water maser emission), made to derive its spectral index and the turnover frequency of the emission. The spectrum of the source rises in the whole frequency range sampled, from 2.4 to 24.9 GHz, although the spectral index seems to decrease at the highest frequencies (0.79 +/- 0.04 between 4.3 and 8.9 GHz, and 0.64 +/- 0.06 between 16.1 and 24.9 GHz). This suggests a turnover frequency of around 20 GHz (which is unusual among PNe, whose radio emission usually becomes optically thin at frequencies < 10 GHz), and a relatively high emission measure (1.5 x 10(9) cm(-6) pc). The radio-continuum emission has increased by a factor of similar or equal to 1.26 at 8.4 GHz in 13 yr, which can be explained as expansion of the ionized region by a factor of similar or equal to 1.12 in radius with a dynamical age of similar or equal to 120 yr and at an expansion velocity of similar or equal to 5-40 km s (-1). These radio-continuum characteristics, together with the presence of water maser emission and a strong optical extinction, suggest that IRAS 17347 - 3139 is one of the youngest PNe known, with a relatively massive progenitor star. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia. CSIC, IEEC, Inst Ciencias Espacio, ES-08034 Barcelona, Spain. UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. RP Gomez, JF, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. EM jfg@iaa.es NR 32 TC 1 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD DEC 1 PY 2005 VL 364 IS 2 BP 738 EP 742 DI 10.1111/j.1365-2966.2005.09592.x PG 5 SC Astronomy & Astrophysics GA 984LZ UT ISI:000233307700035 ER PT J AU Uscanga, L Canto, J Curiel, S Anglada, G Torrelles, JM Patel, NA Gomez, JF Raga, AC TI A 1 AU expanding water maser circular ring in the W75N(B)-VLA 2 shell SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual ( W75N); ISM : jets and outflows; masers; stars : formation ID STAR-FORMING REGIONS; H-II REGIONS; YOUNG STELLAR OBJECTS; H2O MASERS; BIPOLAR OUTFLOW; OH-EMISSION; W75N; PROTOSTARS; MOTION; W49N AB We have identified and modeled a remarkable water maser "microstructure'' of similar or equal to 1.1 mas size within the expanding shell of similar or equal to 0."16 size associated with the young stellar object W75 N(B)-VLA2. The water maser spots of this microstructure present a spatial distribution and line-of-sight velocity components that fit extremely well a circular ring of similar or equal to 1 AU radius expanding at similar or equal to 2.5 km s(-1). In particular, we have studied the spatio-kinematics and intensity distribution of the maser emission of an expanding ring observed at arbitrary angles. We construct position-velocity diagrams for the maser spots, calculating the maximum intensity as a function of the impact parameter and then comparing the results with the observations. This is the first time that such well-ordered spatio-kinematical behavior of the water masers is observed and modeled at the very small scale of similar or equal to 1 AU. The VLA2 maser shell is probably produced by an energetic stellar wind that compresses the ambient medium and drives a shock into it. Water maser emission is excited in flattened structures behind the shocks. We speculate that either these kinds of spatio-kinematical microstructures are produced by fluid instabilities within the shocked material or they correspond to nearly round cloudlets (turbulent eddies?) in the ambient medium that were flattened by the expanding shock. C1 Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CSIC, Inst Ciencias Espac, E-08034 Barcelona, Spain. CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. Royal Observ, United Kingdom Astron Technol Ctr, Edinburgh, Midlothian, Scotland. INTA, Lab Astrofis Espac & Fis Fundamental, E-28080 Madrid, Spain. Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. RP Uscanga, L, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico. EM lucero@astroscu.unam.mx scuriel@astroscu.unam.mx torrelles@ieec.fcr.es npatel@iaa.es jfg@iaaa.es raga@nuclecu.unam.mx NR 37 TC 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 2005 VL 634 IS 1 PN Part 1 BP 468 EP 475 PG 8 SC Astronomy & Astrophysics GA 985AF UT ISI:000233347800041 ER PT J AU Lacy, CHS Torres, G Claret, A Vaz, LPR TI Absolute properties of the eclipsing binary star RW Lacertae SO ASTRONOMICAL JOURNAL DT Article DE binaries : eclipsing; binaries : spectroscopic; stars : evolution; stars : fundamental parameters; stars : individual (RW Lacertae) ID LIMB-DARKENING COEFFICIENTS; MAIN-SEQUENCE; LIGHT CURVES; SPECTROSCOPIC BINARIES; SYNCHRONIZATION TIMES; EVOLUTIONARY MODELS; Y-2 ISOCHRONES; PHOTOMETRY; CIRCULARIZATION; DIMENSIONS AB We present 3004 differential observations in the V bandpass measured by a robotic telescope, as well as 36 pairs of radial velocities from high-resolution spectroscopic observations, of the detached, eccentric, EA-type, 10.37 day period, double-lined eclipsing binary star RW Lac. Absolute dimensions of the components are determined with excellent precision ( better than 0.7% in the masses and 0.5% in the radii) for the purpose of testing various aspects of theoretical modeling. We obtain 0.928 +/- 0.006 M. and 1.186 +/- 0.004 R. for the hotter, larger, more massive, and more luminous photometric primary (star A) and 0.870 +/- 0.004 M. and 0.964 +/- 0.004 R. for the cooler, smaller, less massive, and less luminous photometric secondary (star B). A faint, third component contributes 2.6% of the light in V but is not detected in our spectrograms. The effective temperatures and interstellar reddening of the stars are accurately determined from UBV and uvby beta photometry and from analysis of the spectrograms: 5760 +/- 100 K for the primary and 5560 +/- 150 K for the secondary, corresponding to spectral types of G5 and G7, and 0.050 mag for interstellar reddening Eb-y. The orbits are slightly eccentric, and spectral line widths give observed rotational velocities that are not significantly different from synchronous for both components. The components of RW Lac are old, somewhat metal-deficient, low-mass, main-sequence stars with an age of about 11 Gyr, according to models. C1 Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil. RP Lacy, CHS, Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA. EM clacy@uark.edu gtorres@cfa.harvard.edu claret@iaa.es lpv@fisica.ufmg.br NR 49 TC 12 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 2005 VL 130 IS 6 BP 2838 EP 2846 PG 9 SC Astronomy & Astrophysics GA 988FH UT ISI:000233576800030 ER PT J AU De Buizer, JM Osorio, M Calvet, N TI Observations and modeling of the 2-25 mu m emission from high-mass protostellar object candidates SO ASTROPHYSICAL JOURNAL LA English DT Article DE circumstellar matter; infrared : ISM; ISM : individual (G11.94-0.62, G29.96-0.02, G45.07+0.13); stars : early-type; stars : formation; stars : pre-main sequence ID H-II REGIONS; HOT MOLECULAR CORE; STAR-FORMING REGIONS; MIDINFRARED DETECTION; HII-REGIONS; G29.96-0.02; COMPACT; AMMONIA; ENVIRONMENTS; RESOLUTION AB This is a report on detailed modeling of young high-mass protostellar candidates during their most embedded and obscured phases. We performed narrowband mid-infrared imaging of three candidate high-mass protostellar objects in G11.94-0.62, G29.96-0.02, and G45.07+0.13 at Gemini Observatory using the Thermal-Region Camera and Spectrograph (T-ReCS). The sources were imaged through up to 11 narrowband filters, sampling their SEDs over the entire 2-25 mu m infrared range. For the first time, we have fit the observed SEDs of massive protostars with models that take into account departures from spherical symmetry in the infalling envelopes. In this way, we have been able to derive from the models the detailed physical parameters for these earliest stages of massive stellar life. Our detailed modeling suggests that massive star formation can proceed in a way very similar to the formation of low-mass stars. C1 Gemini Observat, La Serena, Chile. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Harvard Univ, Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP De Buizer, JM, Gemini Observat, Casilla 603, La Serena, Chile. EM jdebuizer@gemini.edu osorio@iaa.es ncalvet@cfa.harvard.edu NR 47 TC 8 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 2005 VL 635 IS 1 PN Part 1 BP 452 EP 465 PG 14 SC Astronomy & Astrophysics GA 993CF UT ISI:000233929600035 ER PT J AU Luz, D Civeit, T Courtin, R Lebreton, JP Gautier, D Rannou, P Kaufer, A Witasse, O Lara, L Ferri, F TI Characterization of zonal winds in the stratosphere of Titan with UVES SO ICARUS LA English DT Article DE Titan; atmospheres, dynamics ID ATMOSPHERE; OCCULTATION; DYNAMICS; TEMPERATURES; SPECTROGRAPH; AEROSOLS; PLANETS AB Titan has been observed with UVES, the UV-Visual Echelle Spectrograph at the Very Large Telescope, with the aim of characterizing the zonal wind flow. We use a retrieval scheme originally developed for absolute stellar accelerometry [Connes, R, 1985. Astrophys. Space Sci., 110, 211-255] to extract the velocity signal by Simultaneously taking into account all the lines present in the spectrum. The method allows to measure the Doppler shift induced at a given point by the zonal wind flow, with high precision. The short-wavelength channel (4200-5200 angstrom) probes one scale height higher than the long-wavelength one (5200-6200 angstrom), and we observe statistically significant evidence for stronger winds at higher altitudes. The results show a high dispersion. Globally, we detect prograde zonal winds, with lower limits of 62 and 50 in s(-1) at the regions centered at 200 and 170 km attitude, but approximately a quarter of the measurements indicates null or retrograde winds. (c) 2005 Elsevier Inc. All rights reserved. C1 Observ Paris, F-91295 Meudon, France. Univ Lisbon, Ctr Astron & Astrofis, P-1349018 Lisbon, Portugal. Estec, ESA, Res & Sci Support Dept, NL-2200 AG Noordwijk, Netherlands. Univ Versailles, Serv Aeron, IPSL, F-91371 Verrieres Le Buisson, France. European So Observ, Santiago 19, Chile. CSIC, Inst Astrofis Andalucia, Granada 18008, Spain. Univ Padua, CISAS, I-35131 Padua, Italy. RP Luz, D, Observ Paris, 5 Pl Jules Janssen, F-91295 Meudon, France. EM david.luz@obspm.fr NR 41 TC 6 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0019-1035 J9 ICARUS JI Icarus PD DEC 15 PY 2005 VL 179 IS 2 BP 497 EP 510 DI 10.1016/j.icarus.2005.07.021 PG 14 SC Astronomy & Astrophysics GA 995HY UT ISI:000234092600015 ER PT J AU Valero-Garces, BL Jenny, E Rondanelli, M Delgado-Huertas, A Burns, SJ Veit, H Moreno, A TI Palaeohydrology of Laguna de Tagua Tagua (34 degrees 30 ' S) and moisture fluctuations in Central Chile for the last 46 000 yr SO JOURNAL OF QUATERNARY SCIENCE LA English DT Article DE westerlies; last glacial Maximum; South America; palaeohydrology; stable isotopes ID MIDLATITUDE SOUTH-AMERICA; GRANDE-DE-CHILOE; LATE PLEISTOCENE; LAKE DISTRICT; ISLA-GRANDE; PALYNOLOGICAL EVIDENCE; LACUSTRINE CARBONATES; ISOTOPIC COMPOSITION; ABRUPT VEGETATION; GLACIAL MAXIMUM AB Central Chile (32-35 degrees S) lies at the northern border of the strong influence of the westerly circulation bell and thus exhibits a steep rainfall gradient. A new core from Laguna de Tagua Tagua (34 degrees 30' S) provides a sedimentologic, geochemical and palynological record of regional hydrologic balance for the last 46 000 cal. yr BP. According to Our age model, relatively humid conditions Occurred during glacial times before 43500 cal.yr BP and from 40000 to 21 500 cal.yr BP. Reduced moisture conditions and likely lower temperatures occurred from 42 400-40100 cal. yr BP. Higher lake levels, and pollen assemblages with Valdivian rainforest taxa, imply much higher precipitation during glacial times (40 100-21 000 cal. yr BP) compared to today and, therefore, enhanced westerly activity in northern Central Chile. Afterwards, the general decrease in moisture was punctuated by two abrupt arid periods at 21 000-19 500 cal. yr BP and 17 00015 000 cal. yr BP, arid two more humid intervals: 19 500-17 000 (almost coincident with the global Last Glacial Maximum, LGM) and 13 500-11 500 cal. yr BP. The early and mid-Holocene were the most arid periods in Central Chile for the studied time interval. Millennial-scale palaeohydrological reconstructions from Tagua Tagua are consistent with regional climatic records. Copyright (C) 2005 John Wiley & Sons, Ltd. C1 CSIC, Spanish Sci Res Council, Pyrenean Inst Ecol, E-50080 Zaragoza, Spain. Univ Bern, Inst Geog, Bern, Switzerland. Concepcion Univ, Dept Forestry, Los Angeles, Biobio, Chile. Spanish Sci Res Council, Estac Expt Zaidin, Granada, Spain. Univ Massachusetts, Dept Geosci, Amherst, MA 01003 USA. RP Valero-Garces, BL, CSIC, Spanish Sci Res Council, Pyrenean Inst Ecol, Apdo 202, E-50080 Zaragoza, Spain. EM blas@ipe.csic.es NR 80 TC 2 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0267-8179 J9 J QUATERNARY SCI JI J. Quat. Sci. PD OCT-DEC PY 2005 VL 20 IS 7-8 BP 625 EP 641 PG 17 SC Geosciences, Multidisciplinary; Paleontology GA 000CQ UT ISI:000234438900002 ER PT J AU Jimenez, A Tiampo, KF Levin, S Posadas, AM TI Testing the persistence in earthquake catalogs: The Iberian Peninsula SO EUROPHYSICS LETTERS LA English DT Article ID FRACTAL DIMENSION; MODELS; DYNAMICS AB The nature of the long-run correlations in a seismic catalog ( the Iberian Peninsula catalogrecorded from 1970 to 2001) is analyzed by means of the Hurst exponent. Different techniques, tested with simulated time series, are used to calculate this parameter, so that the results are reliable. We find that there is strong correlation in the region, and that small earthquakes are very important to the stress transfers. In addition, it is shown that predictability in an earthquake system is a function of the relationship between magnitude and energy, and that seismicity rate, or number of events, provides the best measure of this predictability. C1 Univ Almeria, Dept Appl Phys, Almeria, Spain. Andalusian Inst Geophys & Seism Disaster Prevent, Granada, Spain. Univ Western Ontario, Dept Earth Sci Biol & Geol Sci, London, ON, Canada. Univ Havana, Henri Poincare Chair Complex Syst, Havana, Cuba. RP Jimenez, A, Univ Almeria, Dept Appl Phys, Almeria, Spain. NR 29 TC 2 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD JAN PY 2006 VL 73 IS 2 BP 171 EP 177 DI 10.1209/epl/i2005-10383-8 PG 7 SC Physics, Multidisciplinary GA 000GA UT ISI:000234447700003 ER PT J AU Menanteau, F Ford, HC Motta, V Benitez, N Martel, AR Blakeslee, JP Infante, L TI The morphological demographics of galaxies in the Advanced Camera for Surveys Hubble Ultra Deep parallel fields SO ASTRONOMICAL JOURNAL LA English DT Article DE galaxies : elliptical and lenticular, cD; galaxies : evolution; galaxies : formation; galaxies : structure ID ULTRAVIOLET LUMINOSITY DENSITY; COLOR-MAGNITUDE RELATION; STAR-FORMATION HISTORY; TELESCOPE ADVANCED CAMERA; TADPOLE ADVANCED CAMERA; HIGH-REDSHIFT GALAXIES; SPHEROIDAL GALAXIES; FORMING GALAXIES; SURFACE BRIGHTNESS; DISTANT GALAXIES AB We present a morphological analysis of distant field galaxies using the deep Advanced Camera for Surveys images from the public parallel Near-Infrared Camera and Multi-Object Spectrometer observations of the Hubble Ultra Deep Field obtained in the F435W (B-435), F606W (V-606), F775W (i(775)), and F850LP (z(850)) filters. We morphologically segregate galaxies using a combination of visual classification and objective machine-based selection. We use the asymmetry (A) and central concentration (C) parameters to characterize galaxies up to z(850,AB) < 25 mag. We take advantage of the multicolor data set and estimate redshifts for our sample using the Bayesian photometric redshift, which enables us to investigate the evolution of their morphological demographics with redshift. Using a template fitting model and a maximum likelihood approach, we compute the star formation rate (SFR) for galaxies up to z similar or equal to 1.3 and its contributions from different morphological types. We report that spiral galaxies are the main providers to the total SFR. The E/S0 contribution flattens out at z similar or equal to 1, while the irregular/peculiar (Irr/Pec) galaxy populations continuously rise to match the spiral contribution at z similar or equal to 1:0. We use the i(775) - z850 and V606 - i(775) color-magnitude diagrams to constrain the galaxies' formation histories and find that E/S0s show both a population of luminous red galaxies in place at z similar to 1.2 and a bluer and fainter population resembling that of Irr/Pec at similar redshifts. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. RP Menanteau, F, Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. NR 63 TC 16 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD JAN PY 2006 VL 131 IS 1 BP 208 EP 215 PG 8 SC Astronomy & Astrophysics GA 001TU UT ISI:000234561300016 ER PT J AU Souchie, EL Ascon, R Barea, JM Saggin, OJ da Silva, EMR TI Phosphate solubilization in solid and liquid media by soil bacteria and fungi SO PESQUISA AGROPECUARIA BRASILEIRA DT Article DE Aspergillus; Enterobacteria; phosphorus; growth media; apatite ID MICROORGANISMS AB The objective of this work was to evaluate the ability and efficiency of solubilization of CaHPO4 AlPO4 and Araxa apatite in solid medium, and AlPO4 and Araxa apatite in liquid medium. Soil P-solubilizing fungi (Aspergillus) and P-solubilizing bacteria (Enterobacteriaceae) were tested. In solid medium, all isolates solubilized CaBPO4 not any isolate solubilized Araxa apatite, and one fungus isolate (PSF 7) solubilized AlPO4. In liquid medium, all isolates solubilized AlPO4 and Araxa apatite. Screening of P-solubilizing microorganisms must be done by quantifying their potential of phosphate solubilization in liquid growth medium. C1 Ctr Fed Educ Tecnol, BR-75901970 Rio Verde, Go, Brazil. Estac Expt Zaidin, Dept Microbiol & Sistemas Simbiot, Granada 18008, Spain. Embrapa Agrobiol, BR-23851970 Seropedica, RJ, Brazil. RP Souchie, EL, Ctr Fed Educ Tecnol, Caixa Postal 66, BR-75901970 Rio Verde, Go, Brazil. EM esouchie@yahoo.com.br razcon@eez.csic.es jmbarea@eez.csic.es saggin@cnpab.embrapa.br eliane@cnpab.embrapa.br NR 14 TC 2 PU EMPRESA BRASIL PESQ AGROPEC PI BRASILIA PA EMBRAPA-SPI-PAB SAIN-PARQUE RURAL NORTE, CAIXA POSTAL 04 0315, 70770-901 BRASILIA, BRAZIL SN 0100-204X J9 PESQUISA AGR BRASIL JI Pesqui. Agropecu. Bras. PD NOV PY 2005 VL 40 IS 11 BP 1149 EP 1152 PG 4 SC Agriculture, Multidisciplinary GA 005DP UT ISI:000234803100015 ER PT J AU Handler, G Jerzykiewicz, M Rodriguez, E Uytterhoeven, K Amado, PJ Dorokhova, TN Dorokhov, NI Poretti, E Sareyan, JP Parrao, L Lorenz, D Zsuffa, D Drummond, R Daszynska-Daszkiewicz, J Verhoelst, T De Ridder, J Acke, B Bourge, PO Movchan, AI Garrido, R Paparo, M Sahin, T Antoci, V Udovichenko, SN Csorba, K Crowe, R Berkey, B Stewart, S Terry, D Mkrtichian, DE Aerts, C TI Asteroseismology of the beta Cephei star 12 (DD) Lacertae: photometric observations, pulsational frequency analysis and mode identification SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE techniques : photometric; stars : early-type; stars : individual : 12 (DD) Lacertae; stars : oscillations; stars : variables : other ID WHITE-DWARF G29-38; NU-ERIDANI; NONLINEAR BEHAVIOR; THETA-OPHIUCHI; MAIN-SEQUENCE; MOMENT METHOD; OSCILLATION; AMPLITUDES; CAMPAIGN; SPECTRUM AB We report a multisite photometric campaign for the beta Cephei star 12 Lacertae. 750 h of high-quality differential photoelectric Stromgren, Johnson and Geneva time-series photometry were obtained with nine telescopes during 190 nights. Our frequency analysis results in the detection of 23 sinusoidal signals in the light curves. Ten of those correspond to independent pulsation modes, and the remainder are combination frequencies. We find some slow aperiodic variability such as that seemingly present in several beta Cephei stars. We perform mode identification from our colour photometry, derive the spherical degree l for the five strongest modes unambiguously and provide constraints on l for the weaker modes. We find a mixture of modes of 0 <= l <= 4. In particular, we prove that the previously suspected rotationally split triplet within the modes of 12 Lac consists of modes of different l; their equal frequency splitting must thus be accidental. One of the periodic signals we detected in the light curves is argued to be a linearly stable mode excited to visible amplitude by non-linear mode coupling via a 2:1 resonance. We also find a low-frequency signal in the light variations whose physical nature is unclear; it could be a parent or daughter mode resonantly coupled. The remaining combination frequencies are consistent with simple light-curve distortions. The range of excited pulsation frequencies of 12 Lac may be sufficiently large that it cannot be reproduced by standard models. We suspect that the star has a larger metal abundance in the pulsational driving zone, a hypothesis also capable of explaining the presence of beta Cephei stars in the Large Magellanic Cloud. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Wroclaw Univ Observ, PL-51622 Wroclaw, Poland. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Heverlee, Belgium. Mercator Telescope, Santa Cruz De La Palma 38700, Spain. Odessa Natl Univ, Astron Observ, UA-65014 Odessa, Ukraine. INAF, Osservatorio Astron Brera, I-23807 Merate, Italy. Observ Cote Azur, Dept GEMINI, UMR 6203, F-06304 Nice 4, France. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Konkoly Observ Budapest, H-1525 Budapest 12, Hungary. Univ Liege, Inst Astrophys & Geophys, B-4000 Cointe Ougree, Belgium. Akdeniz Univ, Dept Phys, TR-07058 Antalya, Turkey. Armagh Observ, Armagh BT61 9DG, North Ireland. Univ Hawaii, Dept Phys & Astron, Hilo, HI 96720 USA. Sejong Univ, ARCSEC, Seoul 143747, South Korea. RP Handler, G, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM handler@astro.univie.ac.at NR 49 TC 12 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JAN 1 PY 2006 VL 365 IS 1 BP 327 EP 338 DI 10.1111/j.1365-2966.2005.09728.x PG 12 SC Astronomy & Astrophysics GA 005VT UT ISI:000234853400035 ER PT J AU Vreeswijk, PM Smette, A Fruchter, AS Palazzi, E Rol, E Wijers, RAMJ Kouveliotou, C Kaper, L Pian, E Masetti, N Frontera, F Hjorth, J Gorosabel, J Piro, L Fynbo, JPU Jakobsson, P Watson, D O'Brien, PT Ledoux, C TI Low-resolution VLT spectroscopy of GRBs 991216, 011211 and 021211 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : abundances; galaxies : distances and redshifts; galaxies : quasars : absorption lines ID GAMMA-RAY BURST; EARLY OPTICAL-EMISSION; HIGH COLUMN DENSITY; 28 FEBRUARY 1997; HOST GALAXY; ABSORPTION SYSTEMS; INTERSTELLAR DUST; STAR-FORMATION; GRB 991216; ERROR BOX AB We present low-resolution VLT spectroscopy of the afterglow of the gamma-ray bursts (GRBs) 991216, 011211 and 021211. Our spectrum of GRB 991216 is the only optical spectrum for this afterglow. It shows two probable absorption systems at z = 0.80 and z = 1.02, where the highest redshift most likely reflects the distance to the host galaxy. A third system may be detected at z = 0.77. HST imaging of the field, obtained 4 months after the burst, has resulted in the detection of two amorphous regions of emission, one at the projected afterglow position, and the other 0.''6 away. The spectrum shows a depression in flux in between 4000 angstrom and 5500 angstrom. This could be the result of a 2175 angstrom-type extinction feature in the host of GRB 991216, but at a rather red wavelength of 2360 angstrom. If this interpretation is correct, it is the first time the extinction feature is seen in a GRB afterglow spectrum. It is centered at a wavelength similar to that of the ultra-violet (UV) bumps inferred from observations of a few UV-strong, hydrogen-poor stars in the Galaxy. All significant absorption lines (except for one) detected in the spectrum of GRB 011211 are identified with lines originating in a single absorption system at z = 2.142 +/- 0.002, the redshift of the GRB 011211 host galaxy. We also detect the Ly alpha absorption line in the host, to which we fit a neutral hydrogen column density of log N( H I) = 20.4 +/- 0.2, which indicates that it is a damped Lya system. Using a curve-of-growth analysis, we estimate the Si, Fe and Al metallicity at the GRB 011211 redshift to be [Si/H] = -0.9(-0.4)(+0.6), [Fe/H] = -1.3 +/- 0.3, and [Al/H] = -1.0(-0.3)(+0.5) . For GRB 021211, we detect a single emission line in a spectrum obtained tens of days after the burst, which we identify as [O II] lambda 3727 at z = 1.006. The corresponding unobscured [O II] star-formation rate is 1.4 M-circle dot yr(-1). C1 European So Observ, Santiago 19, Chile. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands. Univ Liege, Inst Astrophy & Geophys, B-4000 Liege, Belgium. Space Telescope Sci Inst, Baltimore, MD 21218 USA. INAF, Ist Astrofis Spaziale & Fis Cosm, Sezione Bologna, I-40129 Bologna, Italy. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. NASA, MSFC, Natl Space Sci Technol Ctr, Huntsville, AL 35805 USA. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen 0, Denmark. CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. INAF, Ist Astrofis Spaziale & Fis Cosm, Sezione Roma, I-00133 Rome, Italy. RP Vreeswijk, PM, European So Observ, Casilla 19001,Alonso de Cordova 3107, Santiago 19, Chile. EM pvreeswi@eso.org NR 90 TC 16 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 2006 VL 447 IS 1 BP 145 EP 156 DI 10.1051/004-6361:20053795 PG 12 SC Astronomy & Astrophysics GA 007GS UT ISI:000234957400014 ER PT J AU Diez, H Lopez, MC Thomas, MD Guzman, F Rosas, F Velazco, V Gonzalez, JM Puerta, C TI Evaluation of IFN-gamma production by CD8(+) T lymphocytes in response to the K1 peptide from KMP-11 protein in patients infected with Trypanosoma cruzi SO PARASITE IMMUNOLOGY LA English DT Article DE CD8(+) T lymphocytes; Chagas disease; HLA-A*0201 epitope; KMP-11; Trypanosoma cruzi ID KINETOPLASTID MEMBRANE PROTEIN-11; CHAGAS-DISEASE; LEISHMANIA-DONOVANI; IMMUNE-RESPONSE; TRANSGENIC MICE; CELLS; IDENTIFICATION; ANTIGEN; IMMUNIZATION; EPITOPES AB The cellular response mediated by MHC class I restricted CD8(+)T cells has been shown to be crucial in the control of Chagas disease. The K1 peptide derived from T. cruzi KMP-11 protein has a high binding affinity to the HLA-A*0201 molecule. Nevertheless, it is not known whether this peptide is processed and displayed as an MHC class I epitope during natural infection by T. cruzi. The aim of this study was to evaluate, by ELISPOT assay, the ability of K1 peptide to activate CD8(+)T lymphocytes to produce IFN-gamma. Therefore, CD8(+)T lymphocytes from 22 HLA-A*0201(+)individuals, 12 chronic chagasic patients and 10 uninfected controls, were analysed. The results revealed that two of the chagasic patients had IFN-gamma-secreting CD8(+)T cells that were able to respond to K1 peptide with a relative frequency of 110 and 230 per million CD8(+)T cells. In contrast, none of HLA-A*0201(+)uninfected controls responded to K1 peptide. Responses to HLA-A*0201 restricted peptide from the influenza matrix protein were found in six chagasic patients and four uninfected controls with an average frequency of 175 and 111 cells per million CD8(+)T cells, respectively. Moreover, a flow cytometric assay for degranulation showed that chagasic responders had K1-specific cytotoxic CD8(+) T cells. It is shown here for the first time that the K1 peptide is efficiently processed, presented and recognized by CD8(+)T lymphocytes during the natural course of Chagas disease. C1 Pontificia Univ Javeriana, Mol Parasitol Lab, Dept Microbiol, Fac Ciencias, Bogota, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Univ Nacl Colombia, Fac Med, Bogota, Colombia. Fdn Clin Shaio, Bogota, Colombia. Univ So Calif, Dept Neurol, Keck Sch Med, Los Angeles, CA USA. RP Puerta, C, Pontificia Univ Javeriana, Mol Parasitol Lab, Dept Microbiol, Fac Ciencias, Bogota, Colombia. EM cpuerta@javeriana.edu.co NR 26 TC 5 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0141-9838 J9 PARASITE IMMUNOL JI Parasite Immunol. PD MAR PY 2006 VL 28 IS 3 BP 101 EP 105 DI 10.1111/j.1365-3024.2005.00815.x PG 5 SC Immunology; Parasitology GA 007QW UT ISI:000234985400006 ER PT J AU Overzier, RA Miley, GK Bouwens, RJ Cross, NJG Zirm, AW Benitez, N Blakeslee, JP Clampin, M Demarco, R Ford, HC Hartig, GF Illingworth, GD Martel, AR Rottgering, HJA Venemans, B Ardila, DR Bartko, F Bradley, LD Broadhurst, TJ Coe, D Feldman, PD Franx, M Golimowski, DA Goto, T Gronwall, C Holden, B Homeier, N Infante, L Kimble, RA Krist, JE Mei, S Menanteau, F Meurer, GR Motta, V Postman, M Rosati, P Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W TI Clustering of star-forming galaxies near a radio galaxy at z=5.2 SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; early universe; galaxies : clusters : general; galaxies : high-redshift; galaxies : individual (TN J0924-2201); galaxies : starburst; large-scale structure of universe ID LYMAN-BREAK GALAXIES; HIGH-REDSHIFT GALAXIES; SUBARU DEEP SURVEY; LY-ALPHA EMITTERS; ULTRAVIOLET LUMINOSITY DENSITY; HUBBLE-SPACE-TELESCOPE; LARGE-SCALE STRUCTURE; ADVANCED CAMERA; ELLIPTIC GALAXIES; STELLAR POPULATIONS AB We present HSTACS observations of the most distant radio galaxy known, TNJ0924-2201 at z = 5.2. This radio galaxy has six spectroscopically confirmed Ly alpha-emitting companion galaxies and appears to lie within an overdense region. The radio galaxy is marginally resolved in i(775) and z(850), showing continuum emission aligned with the radio axis, similar to what is observed for lower redshift radio galaxies. Both the half-light radius and the UV star formation rate are comparable to the typical values found for Lyman break galaxies at z similar to 4-5. The Ly alpha emitters are sub-L-* galaxies, with deduced star formation rates of 1-10 M-circle dot yr(-1). One of the Ly alpha emitters is only detected in Ly alpha. Based on the star formation rate of similar to 3 M-circle dot yr(-1) calculated from Ly alpha, the lack of continuum emission could be explained if the galaxy is younger than similar to 2 Myr and is producing its first stars. Observations in V(606)i(775)z(850) were used to identify additional Lyman break galaxies associated with this structure. In addition to the radio galaxy, there are 22 V-606 break (z similar to 5) galaxies with z(850) < 26.5 (5 sigma), two of which are also in the spectroscopic sample. We compare the surface density of similar to 2 arcmin(-2) to that of similarly selected V-606 dropouts extracted from GOODS and the UDF parallel fields. We find evidence for an overdensity to very high confidence (> 99%), based on a counts-in-cells analysis applied to the control field. The excess suggests that the V-606 break objects are associated with a forming cluster around the radio galaxy. C1 Leiden Observ, NL-2300 RA Leiden, Netherlands. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland. CSIC, Ist Astrofis Andalucia, E-18008 Granada, Spain. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Bartko Sci & Technol, Brighton, CO 80602 USA. Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. Jet Prop Lab, Pasadena, CA 91109 USA. European So Observ, D-85748 Garching, Germany. WM Keck Observ, Kamuela, HI 96743 USA. RP Overzier, RA, Leiden Observ, Postbus 9513, NL-2300 RA Leiden, Netherlands. EM overzier@strw.leidenuniv.nl NR 91 TC 14 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 2006 VL 637 IS 1 PN Part 1 BP 58 EP 73 PG 16 SC Astronomy & Astrophysics GA 009RT UT ISI:000235130800007 ER PT J AU Curiel, S Ho, PTP Patel, NA Torrelles, JM Rodriguez, LF Trinidad, MA Canto, J Hernandez, L Gomez, JF Garay, G Anglada, G TI Large proper motions in the jet of the high-mass YSO Cepheus A HW2 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : individual (Cepheus A); ISM : jets and outflows; radio continuum : ISM; stars : formation ID LARGE ARRAY OBSERVATIONS; STAR-FORMING REGIONS; OB3 MOLECULAR CLOUD; THERMAL RADIO JET; VLA OBSERVATIONS; VLBI OBSERVATIONS; OUTFLOW; MASERS; SERPENS; DISK AB Using high angular resolution (similar to 0. double prime 25 - 0. double prime 05) Very Large Array (VLA) observations made at 3.6 cm, 1.3 cm, and 7 mm during the period 1991 - 2004, we report the detection of large proper motions in the components of the radio continuum jet associated with the high-mass young stellar object (YSO) HW2 in the star-forming region Cepheus A. The relative proper motions observed for the two main components of the outflow, moving away from the central source in nearly opposite directions, are of the order of 140 mas yr(-1), or similar to 480 km s(-1) at a distance of 725 pc. The proper motions observed in the northeast and southwest lobes are not completely antiparallel, and the central elongated source seems to be changing orientation. We discuss possible scenarios to account for these and other observed characteristics. We also report the detection of a 7 mm compact continuum condensation of emission near the center of the thermal radio continuum jet, which we propose as the location of the exciting star. C1 UNAM, Inst Astron, Mexico City 04510, DF, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, E-08034 Barcelona, Spain. Inst Estud Espacials Catalunya, E-08034 Barcelona, Spain. UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. Univ Guanajuato, Dept Astron, Guanajuato 36240, Mexico. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Lab Astrofis Espacial & Fis Fundamental, E-18080 Granada, Spain. Univ Chile, Dept Astron, Santiago, Chile. RP Curiel, S, UNAM, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico. EM scuriel@cfa.harvard.edu pho@cfa.harvard.edu npatel@cfa.harvard.edu torrelle@ieec.fcr.es l.rodriguez@astrosmo.unam.mx trinidad@astro.ugto.mx liliana@astroscu.unam.mx jfg@iaa.es guido@das.uchile.cl guillem@iaa.es NR 41 TC 13 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 2006 VL 638 IS 2 PN Part 1 BP 878 EP 886 PG 9 SC Astronomy & Astrophysics GA 013RA UT ISI:000235425700026 ER PT J AU Bergond, G Zepf, SE Romanowsky, AJ Sharples, RM Rhode, KL TI Wide-field kinematics of globular clusters in the Leo I group SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : elliptical and lenticular, cD; galaxies : halos; galaxies : kinematics and dynamics; galaxies : star clusters ID DARK-MATTER HALOS; ORDINARY ELLIPTIC GALAXIES; PLANETARY-NEBULAE; SPECTROSCOPIC DATA; ORBITAL STRUCTURE; NGC 3379; SYSTEM; NGC-3379; DYNAMICS; M87 AB We present wide-field spectroscopy of globular clusters around the Leo I group galaxies NGC 3379 and NGC 3384 using the FLAMES multi-fibre instrument at the VLT. We obtain accurate radial velocities for 42 globular clusters (GCs) in total, 30 for GCs around the elliptical NGC 3379, eight around the lenticular NGC 3384, and four which may be associated with either galaxy. These data are notable for their large radial range extending from 0.'7 to 14.'5 (2 to 42 kpc) from the centre of NGC 3379, and small velocity uncertainties of about 10 km s(-1). We combine our sample of 30 radial velocities for globular clusters around NGC 3379 with 8 additional GC velocities from the literature, and find a projected velocity dispersion of sigma(p) = 175(-22)(+24) km s(-1) at R < 5' and sigma(p) = 147(-39)(+44) at R > 5'. These velocity dispersions are consistent with a dark matter halo around NGC 3379 with a concentration in the range expected from a Lambda CDM cosmological model and a total mass of approximate to 6 x 10(11) M-.. Such a model is also consistent with the stellar velocity dispersion at small radii and the rotation of the H I ring at large radii, and has a (M/L)(B) that increases by a factor of five from several kpc to 100 kpc. Our velocity dispersion for the globular cluster system of NGC 3379 is somewhat higher than that found for the planetary nebulae (PNe) in the inner region covered by the PN data, and we discuss possible reasons for this difference. For NGC 3384, we find the GC system has a rotation signature broadly similar to that seen in other kinematic probes of this SB0 galaxy. This suggests that significant rotation may not be unusual in the GC systems of disc galaxies. C1 Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Inst Astrofis Andalucia, Granada 18008, Spain. Observ Paris, CAI, GEPI, F-75014 Paris, France. Concepcion Univ, Dept Fis, Concepcion, Chile. Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. Univ Durham, Dept Phys, Durham DH1 3LE, England. Wesleyan Univ, Dept Astron, Middletown, CT 06459 USA. Yale Univ, Dept Astron, New Haven, CT 06520 USA. RP Bergond, G, Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. EM gilles@iaa.es zepf@pa.msu.edu romanow@astro-udec.cl r.m.sharples@durham.ac.uk kathy@astro.wesleyan.edu NR 57 TC 12 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2006 VL 448 IS 1 BP 155 EP 164 DI 10.1051/0004-6361:20053697 PG 10 SC Astronomy & Astrophysics GA 018PP UT ISI:000235777600013 ER PT J AU Mei, S Blakeslee, JP Stanford, SA Holden, BP Rosati, P Strazzullo, V Homeier, N Postman, M Franx, M Rettura, A Ford, H Illingworth, GD Ettori, S Bouwens, RJ Demarco, R Martel, AR Clampin, M Hartig, GF Eisenhardt, P Ardila, DR Bartko, F Benitez, N Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Cross, NJG Feldman, PD Golimowski, DA Goto, T Gronwall, C Infante, L Kimble, RA Krist, JE Lesser, MP Menanteau, F Meurer, GR Miley, GK Motta, V Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W TI Evolution of the color-magnitude relation in high-redshift clusters: Blue early-type galaxies and red pairs in RDCS J0910+5422 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : individual (RDCS J0910+5422); galaxies : elliptical and lenticular, cD; galaxies : evolution ID HUBBLE DEEP FIELD; ELLIPTIC GALAXIES; ADVANCED CAMERA; MS 1054-03; QUANTITATIVE MORPHOLOGY; DISTANT CLUSTERS; S0 GALAXIES; CL 1358+62; CALIBRATION; PHOTOMETRY AB The color-magnitude relation has been determined for the RDCS J0910+5422 cluster of galaxies at redshift z = 1.106. Cluster members were selected from the Hubble Space Telescope Advanced Camera for Surveys (HST ACS) images, combined with ground-based near-IR imaging and optical spectroscopy. The observed early-type color-magnitude relation (CMR) in i(775) - z(850) versus z(850) shows an intrinsic scatter in color of 0.060 +/- 0.009 mag, within 10 from the cluster X-ray emission center. Both the elliptical and the S0 galaxies show small scatter about the CMR of 0.042 +/- 0.010 and 0.044 +/- 0.020 mag, respectively. From the scatter about the CMR, a mean luminosity weighted age t > 3: 3 Gyr (z(f) approximate to 3) is derived for the elliptical galaxies, assuming a simple stellar population modeling (single-burst solar metallicity). Strikingly, the S0 galaxies in RDCS J0910+5422 are systematically bluer in i(775) - z(850), by 0.07 +/- 0.02 mag, than the ellipticals. The ellipticity distribution as a function of color indicates that the face-on S0s in this particular cluster have likely been classified as elliptical. Thus, if anything, the offset in color between the elliptical and S0 populations may be even more significant. The color offset between S0 and E galaxies corresponds to an age difference of approximate to 1 Gyr for a single-burst solar-metallicity model. A solar-metallicity model with an exponential decay in star formation will reproduce the offset for an age of 3.5 Gyr; i.e., the S0s have evolved gradually from star-forming progenitors. The early-type population in this cluster appears to be still forming. The blue early-type disk galaxies in RDCS J0910+5422 likely represent the direct progenitors of the more evolved S0s that follow the same red sequence as elliptical galaxies in other clusters. Thirteen red galaxy pairs are observed, and the galaxies associated in pairs constitute similar to 40% of the CMR galaxies in this cluster. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Calif Davis, Dept Phys, Davis, CA 94516 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA. Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA. European So Observ, D-85748 Garching, Germany. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Leiden Observ, NL-2300 RA Leiden, Netherlands. Univ Paris Sud 11, F-91405 Orsay, France. INAF, Osservat Astron, I-40127 Bologna, Italy. CALTECH, Jet Propuls Lab, Pasadena, CA 91125 USA. Bartko Sci & Technol, Brighton, CO 80602 USA. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. LLC, Conceptual Anal, Glenn Dale, MD 20769 USA. Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. WM Keck Observ, Kamuela, HI 96743 USA. RP Mei, S, Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. EM smei@pha.jhu.edu NR 69 TC 22 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 2006 VL 639 IS 1 PN Part 1 BP 81 EP 94 PG 14 SC Astronomy & Astrophysics GA 019LI UT ISI:000235836900007 ER PT J AU Haislip, JB Nysewander, MC Reichart, DE Levan, A Tanvir, N Cenko, SB Fox, DB Price, PA Castro-Tirado, AJ Gorosabel, J Evans, CR Figueredo, E MacLeod, CL Kirschbrown, JR Jelinek, M Guziy, S Postigo, AD Cypriano, ES LaCluyze, A Graham, J Priddey, R Chapman, R Rhoads, J Fruchter, AS Lamb, DQ Kouveliotou, C Wijers, RAMJ Bayliss, MB Schmidt, BP Soderberg, AM Kulkarni, SR Harrison, FA Moon, DS Gal-Yam, A Kasliwal, MM Hudec, R Vitek, S Kubanek, P Crain, JA Foster, AC Clemens, JC Bartelme, JW Canterna, R Hartmann, DH Henden, AA Klose, S Park, HS Williams, GG Rol, E O'Brien, P Bersier, D Prada, F Pizarro, S Maturana, D Ugarte, P Alvarez, A Fernandez, AJM Jarvis, MJ Moles, M Alfaro, E Ivarsen, KM Kumar, ND Mack, CE Zdarowicz, CM Gehrels, N Barthelmy, S Burrows, DN TI A photometric redshift of z = 6.39 +/- 0.12 for GRB 050904 SO NATURE LA English DT Article ID GAMMA-RAY BURST; OPTICAL AFTERGLOW; RADIATION; EMISSION; PROBE AB Gamma-ray bursts (GRBs) and their afterglows are the most brilliant transient events in the Universe. Both the bursts themselves and their afterglows have been predicted to be visible out to redshifts of z approximate to 20, and therefore to be powerful probes of the early Universe(1,2). The burst GRB 000131, at z = 4.50, was hitherto the most distant such event identified(3). Here we report the discovery of the bright near-infrared afterglow of GRB 050904 (ref. 4). From our measurements of the near-infrared afterglow, and our failure to detect the optical afterglow, we determine the photometric redshift of the burst to be z = 6.39(-0.12)(+0.11) (refs 5-7). Subsequently, it was measured(8) spectroscopically to be z = 6.29 +/- 0.01, in agreement with our photometric estimate. These results demonstrate that GRBs can be used to trace the star formation, metallicity, and reionization histories of the early Universe. C1 Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. CALTECH, Dept Astron, Pasadena, CA 91125 USA. Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo, Brazil. So Observ Astrophys, La Serena, Chile. Lab Nacl Astrofis, BR-37500000 Itajuba, MG, Brazil. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. NASA, George C Marshall Space Flight Ctr, Natl Space Sci Technol Ctr, Huntsville, AL 35805 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands. Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Canberra, ACT 2611, Australia. CALTECH, Space Radiat Lab, Pasadena, CA 91125 USA. Acad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech Republic. Czech Tech Univ, Fac Electrotech, Prague 12135, Czech Republic. Integral Sci Data Ctr, CH-1290 Versoix, Switzerland. Univ Wyoming, Dept Phys & Astron, Laramie, WY 82072 USA. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. Amer Assoc Variable Star Observers, Cambridge, MA 02138 USA. Thueringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Arizona, Multiple Mirror Telescope Observ, Tucson, AZ 85721 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England. Univ Oxford, Dept Phys, Oxford OX1 3RH, England. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RP Reichart, DE, Univ N Carolina, Dept Phys & Astron, Campus Box 3255, Chapel Hill, NC 27599 USA. EM reichart@physics.unc.edu NR 30 TC 43 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAR 9 PY 2006 VL 440 IS 7081 BP 181 EP 183 DI 10.1038/nature04552 PG 3 SC Multidisciplinary Sciences GA 019MC UT ISI:000235839500038 ER PT J AU Zanetti, R Rosso, S Martinez, C Nieto, A Miranda, A Mercier, M Loria, DI Osterlind, A Greinert, R Navarro, C Fabbrocini, G Barbera, C Sancho-Garnier, H Gafa, L Chiarugi, A Mossotti, R CA Helios Working Grp TI Comparison of risk patterns in carcinoma and melanoma of the skin in men: a multi-centre case-case-control study SO BRITISH JOURNAL OF CANCER LA English DT Article DE skin cancer; melanoma; basal-cell carcinoma; squamous-cell carcinoma; case-case-control; sun exposure ID CUTANEOUS MALIGNANT-MELANOMA; BASAL-CELL CARCINOMA; POLYCHOTOMOUS LOGISTIC-REGRESSION; SUN EXPOSURE; SUNLIGHT-EXPOSURE; SUNBURN; CANCER; NEVI; INTERMITTENT; METAANALYSIS AB We directly compared risk factors between 214 histologically confirmed melanomas ( CMM), 215 basal-cell carcinomas ( BCC) and 139 squamous-cell carcinomas ( SCC) in a multiple case-case-control study with 349 controls from patients without dermatological disease admitted to the same hospitals. Subjects with fair hair had a significant risk increase for all types of tumours at a comparable level ( ORadj for blonde hair: CMM 2.3; SCC 2.4; BCC 2.3). The effect of pale eyes was significant and similar for CMM and BCC ( ORadj 2.6). Intermittent sun exposure measured in hours spent at beach during holidays was significant for both CMM ( ORadj 2.6 for more than 7000 lifelong hours) and BCC ( ORadj 2.1 for more than 7000 lifelong hours), while SCC exhibited a significant risk increase for chronic exposure to sunlight measured in hours of outdoor work ( ORadj 2.2 for more than 6000 lifelong hours). In the case-case comparison using a multinomial logistic regression model, we found a statistically significant risk difference for pale eyes, and number of naevi in the CMM group, compared to other skin cancers. For intermittent sun exposure, there was a significant risk difference of BCC when compared to the risk of SCC. Factors influencing risk of SCC are different, with chronic exposure to sun playing a major role in causing this type of carcinoma. C1 GPO, Registro Tumori Piemonte, I-10123 Turin, Italy. Escuela Andaluza Salud Publ, Reg Canc Granada, Granada 18080, Spain. Univ Sevilla, Fac Med, Dept Ciencias Sociosanitarias, Seville 41009, Spain. Inst Portugues Oncol Francisco Gentil, Reg Oncol Reg Sul, P-1093 Lisbon, Portugal. Registre Tumeurs Doubs, Fac Med Pharm, F-25030 Besancon, France. Inst Oncol, RA-1417 Buenos Aires, DF, Argentina. Dermatol Clin, DK-3400 Hillerod, Denmark. Dermatol Zentrum, Krankenhaus Buxtehude, Buxtehude, Germany. Consejena Sanidad & Consumo, Serv Epidemiol, Murcia 30008, Spain. Univ Naples Federico II, Dermatol Clin, Naples, Italy. Osped Infermi Biella, Biella, Italy. Epidaure, F-34298 Montpellier, France. Lega Italiana Lotta Tumori Sez Provinciale Ragusa, I-97100 Ragusa, Italy. Univ Florence, Dipartimento Dermatol, I-58160 Florence, Italy. CNR, ISMAC, I-13900 Biella, Italy. RP Zanetti, R, GPO, Registro Tumori Piemonte, Via Francesco Paola 31, I-10123 Turin, Italy. EM roberto.zanetti@cpo.it NR 30 TC 10 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0007-0920 J9 BRIT J CANCER JI Br. J. Cancer PD MAR 13 PY 2006 VL 94 IS 5 BP 743 EP 751 DI 10.1038/sj.bjc.6602982 PG 9 SC Oncology GA 019WR UT ISI:000235868700022 ER PT J AU Perez-Montero, E Diaz, AI Vilchez, JM Kehrig, C TI An empirical calibration of sulphur abundance in ionised gaseous nebulae SO ASTRONOMY & ASTROPHYSICS DT Article DE ISM : abundances; ISM : HII regions ID H-II-REGIONS; PRIMORDIAL HELIUM ABUNDANCE; NEAR-INFRARED SPECTROSCOPY; BLUE COMPACT GALAXIES; MODEL-HII REGIONS; CHEMICAL-COMPOSITION; COMPOSITION GRADIENT; PHOTOIONIZATION MODELS; ELECTRON TEMPERATURES; ELEMENTAL ABUNDANCES AB We have derived an empirical calibration of the abundance of S/H as a function of the S-23 parameter, defined using the bright sulphur lines of [SII] and [SIII]. Contrary to the case for the widely used O-23 parameter, the calibration remains single valued up to the abundance values observed in the disk HII regions. The calibration is based on a large sample of nebulae for which direct determinations of electron temperatures exist and the sulphur chemical abundances can be directly derived. ICFs, as derived from the [SIV] 10.52 mu emission line (ISO observations), are shown to be well reproduced by Barker's formula for a value of alpha = 2.5. Only about 30% of the objects in the sample require ICFs larger than 1.2. The use of the proposed calibration opens the possibility of performing abundance analysis with red to IR spectroscopic data using S/H as a metallicity tracer. C1 Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Observ Nacl, BR-20921400 Rio De Janeiro, Brazil. RP Perez-Montero, E, Univ Autonoma Madrid, Dept Fis Teor, C-XI, E-28049 Madrid, Spain. EM enrique.perez@uam.es angeles.diaz@uam.es jvm@iaa.es kehrig@iaa.es NR 60 TC 5 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2006 VL 449 IS 1 BP 193 EP 201 DI 10.1051/0004-6361:20054216 PG 9 SC Astronomy & Astrophysics GA 021OD UT ISI:000235991600021 ER PT J AU Ripepi, V Bernabei, S Marconi, M Palla, F Ferro, AA Bonanno, A Ferrara, P Frasca, A Jiang, XJ Kim, SL Marinoni, S Mignemi, G Monteiro, MJPFG Oswalt, TD Reegen, P Janulis, R Rodriguez, E Rolland, A Ruoppo, A Terranegra, L Zwintz, K TI A multisite photometric campaign on the pre-main-sequence delta Scuti pulsator IP Persei SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : variables : delta Scuti; stars : oscillations; stars : pre-main sequence; stars : fundamental parameters; stars : individual : IP Persei ID HERBIG AE STAR; LIGHT VARIABILITY; INSTABILITY STRIP; PRAESEPE CLUSTER; UVBY PHOTOMETRY; STANDARD STARS; TELESCOPE; CATALOG; HR-5999; CANCRI AB We present the results of a photometric multisite campaign on the delta Scuti Pre-Main- Sequence star IP Per. Nine telescopes have been involved in the observations, with a total of about 190 h of observations over 38 nights. Present data confirms the multiperiodic nature of this star and leads to the identification of at least nine pulsational frequencies. Comparison with the predictions of linear non-adiabatic radial pulsation models allowed us to identify only five of the nine observed frequencies, and to constrain the position of IP Per in the HR diagram. The latter is in good agreement with the empirical determination of the stellar parameters obtained by Miroshnichenko et al. ( 2001, A&A, 377, 854). An initial interpretation of the observed frequencies using the Aarhus non-radial pulsation code suggests that three frequencies could be associated with non-radial ( l = 2) modes. Finally, we present new evolutionary and pulsation models at lower metallicity ( Z = 0.008) to take into account the possibility that IP Per is metal deficient, as indicated by Miroshnichenko et al. ( 2001, A&A, 377, 854). C1 INAF, Osservatorio Astron Capodimonte, I-80131 Naples, Italy. INAF, Osservatorio Astron Bologna, I-40127 Bologna, Italy. Univ La Laguna, Dept Astrofis, San Cristobal la Laguna 30071, Spain. INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. INAF, Osservatorio Astrofis Catania, I-95125 Catania, Italy. Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. Korea Astron & Space Sci Inst, Taejon 305348, South Korea. Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, I-95123 Catania, Italy. Univ Porto, Fac Ciencias, DMA, P-4150762 Oporto, Portugal. Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal. Florida Inst Technol, Melbourne, FL 32901 USA. Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Vilnius State Univ, Inst Theoret Phys & Astron, Vilnius, Lithuania. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. RP Ripepi, V, INAF, Osservatorio Astron Capodimonte, Via Moiariello 16, I-80131 Naples, Italy. NR 42 TC 4 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD APR PY 2006 VL 449 IS 1 BP 335 EP U128 DI 10.1051/0004-6361:20054164 PG 11 SC Astronomy & Astrophysics GA 021OD UT ISI:000235991600033 ER PT J AU Souchie, EL Saggin-Junior, OJ Silva, EMR Campello, EFC Azcon, R Barea, JM TI Communities of P-solubilizing bacteria, fungi and arbuscular mycorrhizal fungi in grass pasture and secondary forest of Paraty, RJ Brazil SO ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS DT Article DE phosphate; Enterobacteriaceae; Atlantic forest; Glomeromycota; soil microorganisms ID PHOSPHATE SOLUBILIZATION; ROCK PHOSPHATE; WHEAT ROOTS; SOIL; PLANT; COLONIZATION; PHOSPHORUS; GROWTH; AGROECOSYSTEMS; MICROORGANISMS AB Communities of P-solubilizing bacteria, fungi and arbuscular mycorrhizal fungi, were evaluated in two different ecosystems. Samplings taken from two areas of Atlantic forest, in Paraty - RJ, Brazil, one with a secondary forest and the other with a grass pasture were studied. Four growth media: GL (glucose and yeast extract), GES (glucose, soil extract, KNO3, CaCl2, MgSO4, NaCl, FeEDTA and micronutrients solution), GAGES (glucose, soil extract, arabinose, glycerol, CaCl2, MgSO4 and NaCl) and GELP (glucose, soil extract, yeast extract, peptone, CaCl2, MgSO4 and NaCl) were evaluated for the isolation of P-solubilizing microorganisms. The identification of P-solubilizing bacteria was based on 16 S rDNA sequence analysis, while the identification of P-solubilizing fungi and arbuscular mycorrhizal fungi was based on morphology. The greatest number of P-solubilizing bacteria was isolated using GL and GELP growth media. The greatest number of P-solubilizing fungi was isolated using GAGES and GES. The bacteria were identified as Enterobacteriaceae and Bacillus sp., while the P-solubilizing fungi were identified as Aspergillus sp. Glomus macrocarpum and Glomus etunicatum were the dominant mycorrhizal fungi in the secondary forest and grass pasture area, respectively. C1 Ctr Fed Educ Tecnol, BR-75901970 Rio Verde, Go, Brazil. EMBRAPA, BR-23890970 Seropedica, RJ, Brazil. Estac Expt Zaidin, Dep Microbiol & Sistemas Simbiot, Granada 18008, Spain. RP Souchie, EL, Ctr Fed Educ Tecnol, Cx Postal 66, BR-75901970 Rio Verde, Go, Brazil. EM esouchie@yahoo.com.br NR 40 TC 4 PU ACAD BRASILEIRA DE CIENCIAS PI RIO JANEIRO PA RUA ANFILOFIO DE CARVALHO, 29, 3 ANDAR, 20030-060 RIO JANEIRO, BRAZIL SN 0001-3765 J9 AN ACAD BRASIL CIENC JI An. Acad. Bras. Cienc. PD MAR PY 2006 VL 78 IS 1 BP 183 EP 193 PG 11 SC Multidisciplinary Sciences GA 021QC UT ISI:000235997100016 ER PT J AU Adriano-Anaya, A Salvador-Figueroa, M Ocampo, JA Garcia-Romera, I TI Plant cell-wall degrading hydrolytic enzymes of Gluconacetobacter diazotrophicus SO SYMBIOSIS LA English DT Article DE Gluconacetobacter diazotrophicus; endoglucanase; endopolymethylgalacturonase; endoxyloglucanase; hydrolytic enzymes ID BACTERIUM ACETOBACTER-DIAZOTROPHICUS; TRICHODERMA-REESEI; PECTOLYTIC ENZYMES; BASAL EXPRESSION; SUGAR-CANE; INFECTION; CELLULASE; RHIZOBIUM; INOCULATION; INDUCTION AB The strains PA15 and UAP5541 of Gluconacetobacter diazotrophicus were able to produce endoglucanase (EG), endopolymethylgalacturonase (EPMG) and endoxyloglucanase (EXG) enzymes using sucrose or the corresponding substrate as the sole source of carbon. The results indicate that the hydrolytic activity of the PA15 strain was inducible, whereas that of the UAP5541 strain seems to be constitutive (regardless of the concentration of sucrose used). When the concentration of the enzymatic substrates was increased in the culture medium, the production of hydrolytic enzymes decreased. The different behaviour of the strains PA15 and UAP5541 grown in the culture medium with different concentrations of sucrose and the enzymatic substrates demonstrates, that the microbial response and the control of the enzymatic expression of G. diazotrophicus strains were different and complex and may be important in their capacity to penetrate plant root as well as in their competitive capacity against other microorganisms. C1 CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Autonoma Chiapas, Area Biotecnol, Tapachula 30700, Chiapas, Mexico. RP Ocampo, JA, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Prof Albareda 1,Apdo 419, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 33 TC 1 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT 76120, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 2005 VL 40 IS 3 BP 151 EP 156 PG 6 SC Microbiology GA 022XC UT ISI:000236088400004 ER PT J AU Delgado, M Olavarrieta, P Vergara, P TI Fuzzy set based protocols for process quality control SO INTERNATIONAL JOURNAL OF UNCERTAINTY FUZZINESS AND KNOWLEDGE-BASED SYSTEMS LA English DT Article DE control; fuzzy; statistical; quality AB Industrial process quality control has as yet been carried out using Shewhart's classic charts and control charts with probabilistic limits, using sampling statistics for average and deviation (m) over cap and (sigma) over cap, respectively, or C-p and C-pk, derived from them, in order to determine whether the process is precise or imprecise. Although these statistics has been formulated using crisp mathematics, their use returns statements about "quality control" which are full of vagueness (for example, the aforementioned idea of precise or imprecise processes). For this reason, it seems both natural and interesting to introduce tools from Fuzzy Sets Theory for the formulation of quality control models. Fuzzy Sets shall be used to study process quality capability and to generate a bilateral simultaneous control for the central tendency and a unilateral one for variability. We shall define linguistic rules in order to perform this control and membership functions for the sample control mean and deviation, (x) over cap and (s) over cap. C1 Dept Comp Sci, Granada 18071, Spain. AI Univ Granada, Granada 18071, Spain. Univ Tecnol Metropolitana, Dept Elect, Santiago, Chile. Univ Tecnol Metropolitana, Dept Ind, Santiago, Chile. RP Delgado, M, Dept Comp Sci, Granada 18071, Spain. EM mdelgado@ugr.es polavarr@utem.cl pvergara@utem.cl NR 12 TC 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-4885 J9 INT J UNCERTAIN FUZZ KNOWL-B JI Int. J. Uncertainty Fuzziness Knowl.-Based Syst. PD FEB PY 2006 VL 14 IS 1 BP 61 EP 76 PG 16 SC Computer Science, Artificial Intelligence GA 025BR UT ISI:000236240800006 ER PT J AU Zheng, W Overzier, RA Bouwens, RJ White, RL Ford, HC Benitez, N Blakeslee, JP Bradley, LD Jee, MJ Martel, AR Mei, S Zirm, AW Illingworth, GD Clampin, M Hartig, GF Ardila, DR Bartko, F Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Cross, NJG Demarco, R Feldman, PD Franx, M Golimowski, DA Goto, T Gronwall, C Holden, B Homeier, N Infante, L Kimble, RA Krist, JE Lesser, MP Menanteau, F Meurer, GR Miley, GK Motta, V Postman, M Rosati, P Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI TI An overdensity of galaxies near the most distant radio-loud quasar SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : high-redshift; large-scale structure of universe; quasars : individual (SDSS J0836+0054) ID ULTRA DEEP FIELD; LYMAN-BREAK GALAXIES; DIGITAL SKY SURVEY; LY-ALPHA EMITTERS; LUMINOUS QUASARS; ADVANCED CAMERA; STAR-FORMATION; DISCOVERY; REDSHIFT; CLUSTERS AB A 5 arcmin(2) region around the luminous radio-loud quasar SDSS J0836+0054 (z = 5.8) hosts a wealth of associated galaxies, characterized by very red (1: 3 < i(775) similar to z(850) < 2: 0) color. The surface density of these z similar to 5: 8 candidates is approximately 6 times higher than the number expected from deep ACS fields. This is one of the highest galaxy overdensities at high redshifts, which may develop into a group or cluster. We also find evidence for a substructure associated with one of the candidates. It has two very faint companion objects within 200, which are likely to merge. The finding supports the results of a recent simulation, which finds that luminous quasars at high redshifts lie on the most prominent dark matter filaments and are surrounded by many fainter galaxies. The quasar activity from these regions may signal the buildup of a massive system. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Leiden Observ, NL-2300 RA Leiden, Netherlands. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. CALTECH, IPAC, Spitzer Sci Ctr, Pasadena, CA 91125 USA. Bartko Sci & Technol, Brighton, CO 80602 USA. Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. Metajiva, Edmonds, WA 98026 USA. Conceptual Analyt LLC, Glenn Dale, MD 20769 USA. Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland. Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. European So Observ, D-85748 Garching, Germany. WM Keck Observ, Kamuela, HI 96743 USA. RP Zheng, W, Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. NR 32 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 2006 VL 640 IS 2 PN Part 1 BP 574 EP 578 PG 5 SC Astronomy & Astrophysics GA 026RR UT ISI:000236360300004 ER PT J AU Rodriguez, E Amado, PJ Suarez, JC Moya, A Dupret, MA Poretti, E Grigahcene, A Costa, V Lopez- Gonzalez, MJ TI The frequency ratio method and the new multiperiodic gamma Doradus star HD218427 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : variables : general; stars : individual : HD218427; stars : oscillations; techniques : photometric ID LAMBDA-BOOTIS STARS; SIMULTANEOUS UVBY PHOTOMETRY; DELTA-SCT STAR; MULTISITE CAMPAIGN; CHEMICAL-COMPOSITION; PARTICLE-TRANSPORT; ROTATING STARS; MASS-LOSS; F-STARS; A-STARS AB Oscillations of gamma Dor-type were discovered in the star HD218427 through simultaneous uvby photometric observations carried out in the year 2003. A few H-beta-Crawford measurements were also collected for calibration purposes and they locate this star well inside the gamma Dor instability region. We find HD 218427 to be deficient in metals, similar to other well-defined gamma Dor stars, and discuss the possibility that it has a lambda Boo nature. We carried out frequency analysis for different filters, including the combined "vby" filter, and five frequencies were found as significant with periods ranging between 0.3 and 0.8 days. The recently-developed frequency ratio method is used in order to identify the excited modes. The results are consistent with an l = 2 identification for all the modes and with high radial quantum numbers ( n similar to 40) for the three main observed periodicities. The possibility of multiplet structures is also discussed. However, no consistency is found when using the time-dependent convection treatment to discriminate modes. This disagreement can be due to the large rotation velocity taking place in HD218427 and, consequently, the significant coupling between the modes. C1 CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. European So Observ, Santiago 19, Chile. Observ Paris, LESIA, UMR 8109, F-92190 Meudon, France. INAF, Osserv Astron Brera, I-23807 Merate, Italy. Algiers Observ, CRAAG, Algiers 16340, Algeria. RP Rodriguez, E, CSIC, Inst Astrofis Andalucia, POB 3004, Granada 18080, Spain. EM eloy@iaa.es NR 62 TC 2 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2006 VL 450 IS 2 BP 715 EP 723 DI 10.1051/0004-6361:20053942 PG 9 SC Astronomy & Astrophysics GA 031LZ UT ISI:000236707400024 ER PT J AU Sanchez, N Alfaro, EJ Perez, E TI On the properties of fractal cloud complexes SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : clouds; ISM : general; ISM : structure ID INITIAL MASS FUNCTION; MOLECULAR CLOUDS; STAR-FORMATION; INTERSTELLAR-MEDIUM; TURBULENT FRAGMENTATION; MAGNETIC-FIELD; COLUMN DENSITY; MODELS; STATISTICS; SPECTRUM AB We study the physical properties derived from interstellar cloud complexes having a fractal structure. We first generate fractal clouds with a given fractal dimension and associate each clump with a maximum in the resulting density field. Then, we discuss the effect that different criteria for clump selection have on the derived global properties. We calculate the masses, sizes, and average densities of the clumps as a function of the fractal dimension (D-f) and the fraction of the total mass in the form of clumps (epsilon). In general, clump mass does not fulfill a simple power law with size of the type M-cl proportional to R-cl(gamma); instead, the power changes, from gamma similar or equal to 3 at small sizes to gamma < 3 at larger sizes. The number of clumps per logarithmic mass interval can be fitted to a power law N-cl proportional to M-cl(-alpha M) cl in the range of relatively large masses, and the corresponding size distribution is N-cl proportional to M-cl(-alpha M) cl at large sizes. When all the mass is forming clumps (epsilon = 1), we obtain that as Df increases from 2 to 3, alpha(M) increases from similar to 0.3 to similar to 0.6 and alpha(R) increases from similar to 1.0 to similar to 2.1. Comparison with observations suggests that D-f similar or equal to 2: 6 is roughly consistent with the average properties of the ISM. On the other hand, as the fraction of mass in clumps decreases (epsilon < 1), alpha(M) increases and alpha(R) decreases. When only similar to 10% of the complex mass is in the form of dense clumps, we obtain alpha(M) similar or equal to 1.2 for D-f = 2.6 ( not very different from the Salpeter value 1.35), suggesting this a likely link between the stellar initial mass function and the internal structure of molecular cloud complexes. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Zulia, Dept Fis, Maracaibo 4011, Venezuela. RP Sanchez, N, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. EM nestor@iaa.es emilio@iaa.es eperez@iaa.es NR 59 TC 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 10 PY 2006 VL 641 IS 1 PN Part 1 BP 347 EP 356 PG 10 SC Astronomy & Astrophysics GA 033AH UT ISI:000236817800027 ER PT J AU Gil-Montoya, JA de Mello, ALF Cardenas, CB Lopez, IG TI Oral health protocol for the dependent institutionalized elderly SO GERIATRIC NURSING LA English DT Article ID NURSING-HOME RESIDENTS; CORONARY-HEART; SURGERY; CARE; RINSE; STAFF AB Establishing an oral hygiene protocol for the frail and functionally dependent elderly should be of special concern to health care providers. The previous assessment of a care center, including patients or residents and staff, allows an effective strategy to be designed. Oral health protocols are mainly based on the daily removal of bacterial plaque from teeth or prostheses (or both), cleaning of oral mucosa, and continual oral hydration. These practices are facilitated by the use of electric toothbrushes and products such as chlorhexidine, fluoride toothpastes, and rinses or gels for dry mouth. This type of protocol should include regular collaboration with dental professionals and provide a program of continuous training for nursing staff on oral health issues. C1 Univ Granada, Sch Dent, Dept Speical Care Dent & Gerodontol, Granada, Spain. Domiciliary Assistant Dent Program, Granada, Spain. Univ Fed Santa Catarina, Florianopolis, SC, Brazil. Univ Granada, Sch Dent, Granada, Spain. RP Gil-Montoya, JA, Univ Granada, Sch Dent, Dept Speical Care Dent & Gerodontol, Granada, Spain. NR 32 TC 3 PU MOSBY, INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 USA SN 0197-4572 J9 GERIATR NURS JI Geriatr. Nurs. PD MAR-APR PY 2006 VL 27 IS 2 BP 95 EP 101 DI 10.1016/j.gerinurse.2005.12.003 PG 7 SC Geriatrics & Gerontology; Gerontology; Nursing GA 034EU UT ISI:000236912500015 ER PT J AU Turler, M Chernyakova, M Courvoisier, TJL Foellmi, C Aller, MF Aller, HD Kraus, A Krichbaum, TP Lahteenmaki, A Marscher, A McHardy, IM O'Brien, PT Page, KL Popescu, L Robson, EI Tornikoski, M Ungerechts, H TI A historic jet-emission minimum reveals hidden spectral features in 3C 273 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE quasars : general; quasars : individual : 3C 273; infrared : galaxies; X-rays : galaxies ID X-RAY-SPECTRUM; QUASAR 3C 273; RADIO-SOURCES; MULTIWAVELENGTH OBSERVATIONS; VARIABILITY; 3C273; LINE AB Aims. The aim of this work is to identify and study spectral features in the quasar 3C 273 usually blended by its strong jet emission. Methods. A historic minimum in the sub-millimetre emission of 3C 273 triggered coordinated multi-wavelength observations in June 2004. length X-ray observations from the INTEGRAL, XMM-Newton and RXTE satellites are complement complemented by ground-based optical, infrared, millimetre and radio observations. The overall spectrum is used to model the infrared and X- ray spectral components. Results. Three thermal dust emission components are identified in the infrared. The dust emission on scales from 1 pc to several kpc is comparable to that of other quasars, as expected by AGN unification schemes. The observed weakness of the X-ray emission supports the hypothesis of a synchrotron self-Compton origin for the jet component. There is a clear soft-excess and we find evidence for a very broad iron line which could be emitted in a disk around a Kerr black hole. Other signatures of a Seyfert-like X-ray component are not detected. C1 INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland. Observ Geneva, CH-1290 Sauverny, Switzerland. European So Observ, Santiago, Chile. Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA. Max Planck Inst Radioastron, D-53121 Bonn, Germany. Helsinki Univ Technol, Metsahovi Radio Observ, Kylmala 02540, Finland. Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA. Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland. Inst Radio Astron Millimetr, Granada 18012, Spain. RP Turler, M, INTEGRAL Sci Data Ctr, Ch Ecogia 16, CH-1290 Versoix, Switzerland. EM Marc.Turler@obs.unige.ch NR 24 TC 8 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2006 VL 451 IS 1 BP L1 EP L4 DI 10.1051/0004-6361:200600023 PG 4 SC Astronomy & Astrophysics GA 036TB UT ISI:000237097200001 ER PT J AU Graham, RR Kozyrev, SV Baechler, EC Reddy, MPL Plenge, RM Bauer, JW Ortmann, WA Koeuth, T Escribano, MF Pons-Estel, B Petri, M Daly, M Gregersen, PK Martin, J Altshuler, D Behrens, TW Alarcon-Riquelme, ME CA Argentine Collaborative Grp; Spanish Collaborative Grp TI A common haplotype of interferon regulatory factor 5 (IRF5) regulates splicing and expression and is associated with increased risk of systemic lupus erythematosus SO NATURE GENETICS LA English DT Article ID HUMAN GENE-EXPRESSION; INDUCTION; ALPHA; GENOME; DISEQUILIBRIUM; ACTIVATION; LINKAGE; BLOOD; CELLS AB Systemic lupus erythematosus (SLE) is a complex autoimmune disease(1) characterized by activation of the type I interferon (IFN) pathway(2-4). Here we convincingly replicate association of the IFN regulatory factor 5 (IRF5) rs2004640 T allele with SLE5 in four independent case-control cohorts (P = 4.4 x 10(-16)) and by family-based transmission disequilibrium test analysis (P = 0.0006). The rs2004640 T allele creates a 5' donor splice site in an alternate exon 1 of IRF5, allowing expression of several unique IRF5 isoforms. We also identify an independent cis-acting variant associated with elevated expression of IRF5 and linked to the exon 1B splice site. Haplotypes carrying the variant associated with elevated expression and lacking the exon 1B donor site do not confer risk of SLE. Thus, a common IRF5 haplotype driving elevated expression of multiple unique isoforms of IRF5 is an important genetic risk factor for SLE, establishing a causal role for type I IFN pathway genes in human autoimmunity. C1 Uppsala Univ, Rudbcek Lab, Unit Med Genet, Dept Genet & Pathol, S-75185 Uppsala, Sweden. MIT, Cambridge, MA 02142 USA. Harvard Univ, Broad Inst, Program Med & Populat Genet, Cambridge, MA 02142 USA. Massachusetts Gen Hosp, Ctr Human Genet Res & Mol Biol, Boston, MA 02114 USA. Univ Minnesota, Sch Med, Ctr Immunol, Minneapolis, MN 55455 USA. Hosp Virgen del Rocio, Serv Inmunol, Seville 41013, Spain. Sanatorio Parque, RA-2000 Rosario, Santa Fe, Argentina. Johns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205 USA. N Shore Long Isl Jewish Hlth Syst, Feinstein Inst Med Res, Manhasset, NY 11030 USA. CSIC, Inst Biomed Lopez Neyra, Granada 18100, Spain. RP Alarcon-Riquelme, ME, Uppsala Univ, Rudbcek Lab, Unit Med Genet, Dept Genet & Pathol, S-75185 Uppsala, Sweden. EM behre001@umn.edu marta.alarcon@genpat.uu.se NR 24 TC 96 PU NATURE PUBLISHING GROUP PI NEW YORK PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA SN 1061-4036 J9 NAT GENET JI Nature Genet. PD MAY PY 2006 VL 38 IS 5 BP 550 EP 555 DI 10.1038/ng1782 PG 6 SC Genetics & Heredity GA 037LE UT ISI:000237147500016 ER PT J AU de Gregorio-Monsalvo, I Gomez, JF Suarez, O Kuiper, TBH Rodriguez, LF Jimenez-Bailon, E TI CCS and NH3 emission associated with low-mass young stellar objects SO ASTROPHYSICAL JOURNAL LA English DT Review DE astrochemistry; ISM : clouds; ISM : evolution; ISM : molecules; stars : formation; stars : pre-main-sequence ID STAR-FORMING REGIONS; MONTH MONITORING SURVEY; VELOCITY MOLECULAR GAS; HERBIG-HARO OBJECTS; DARK CLOUD CORES; H-II-REGIONS; IRAS SOURCES; DENSE CORES; WATER MASERS; BIPOLAR OUTFLOW AB In this work we present a sensitive and systematic single-dish survey of CCS emission ( complemented with ammonia observations) at 1 cm, toward a sample of low- and intermediate-mass young star-forming regions known to harbor water maser emission, made with NASA's 70 m antenna at Robledo de Chavela, Spain. Out of the 40 star-forming regions surveyed in the CCS (2(1) - 1(0)) line, only six low- mass sources show CCS emission: one transitional object between the prestellar and protostellar Class 0 phase (GF9-2), three Class 0 protostars (L1448-IRS3, L1448C, and B1-IRS), a Class I source (L1251A), and a young T Tauri star (NGC 2071 North). Since CCS is considered an "early-time'' (less than or similar to 10(5) yr) molecule, we explain these results by either proposing a revision of the classification of the age of NGC 2071 North and L1251A, or suggesting the possibility that the particular physical conditions and processes of each source affect the destruction/production of the CCS. No statistically significant relationship was found between the presence of CCS and parameters of the molecular outflows and their driving sources. Nevertheless, we found a significant relationship between the detectability of CCS and the ammonia peak intensity ( higher in regions with CCS), but not with its integrated intensity. This tendency may suggest that the narrower ammonia line widths in the less turbulent medium associated with younger cores may compensate for the differences in ammonia peak intensity, rendering differences in integrated intensity negligible. From the CCS detection rate we derive a lifetime of this molecule of similar or equal to(0.7-3) x 10(4) yr in low-mass star-forming regions. C1 Lab Astrofis Espacial & Fis Fundamental INTA, E-28080 Madrid, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico. ESA, RSSD, XMM Newton Sci Operat Ctr, E-28080 Madrid, Spain. RP de Gregorio-Monsalvo, I, Lab Astrofis Espacial & Fis Fundamental INTA, Apartado 50727, E-28080 Madrid, Spain. NR 109 TC 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 1 PY 2006 VL 642 IS 1 PN Part 1 BP 319 EP 329 PG 11 SC Astronomy & Astrophysics GA 038GH UT ISI:000237206600025 ER PT J AU Fynbo, JPU Starling, RLC Ledoux, C Wiersema, K Thone, CC Sollerman, J Jakobsson, P Hjorth, J Watson, D Vreeswijk, PM Moller, P Rol, E Gorosabel, J Naranen, J Wijers, RAMJ Bjornsson, G Ceron, JMC Curran, P Hartmann, DH Holland, ST Jensen, BL Levan, AJ Limousin, M Kouveliotou, C Nelemans, G Pedersen, K Priddey, RS Tanvir, NR TI Probing cosmic chemical evolution with gamma-ray bursts: GRB 060206 at z=4.048 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : high-redshift; galaxies : abundances; cosmology : observations ID LYMAN-ALPHA SYSTEMS; HIGH-REDSHIFT; HOST GALAXIES; PHYSICAL CONDITIONS; MOLECULAR-HYDROGEN; NEUTRAL GAS; LY-ALPHA; ABUNDANCES; UNIVERSE; SPECTROSCOPY AB Aims. We present early optical spectroscopy of the afterglow of the gamma-ray burst GRB060206 with the aim of determining the metallicity of the GRB absorber and the physical conditions in the circumburst medium. We also discuss how GRBs may be important complementary probes of cosmic chemical evolution. Methods. Absorption line study of the GRB afterglow spectrum. Results. We determine the redshift of the GRB to be z = 4.04795 +/- 0.00020. Based on the measurement of the neutral hydrogen column density from the damped Lyman-alpha line and the metal content from weak, unsaturated S II lines we derive a metallicity of [S/H] = -0.84 +/- 0.10. This is one of the highest metallicities measured from absorption lines at z similar to 4. From the very high column densities for the forbidden Si II*, O I*, and O I** lines we infer very high densities and low temperatures in the system. There is evidence for the presence of H-2 molecules with log N(H-2) similar to 17.0, translating into a molecular fraction of log f approximate to 3.5 with f = 2N(H-2)/(2N(H-2) + N(H-I)). Even if GRBs are only formed by single massive stars with metallicities below similar to 0.3 Z(circle dot), they could still be fairly unbiased tracers of the bulk of the star formation at z > 2. Hence, metallicities as derived for GRB060206 here for a complete sample of GRB afterglows will directly show the distribution of metallicities for representative star-forming galaxies at these redshifts. C1 Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. European So Observ, Santiago 19001, Chile. Univ Chile, Dept Astron, Santiago, Chile. European So Observ, D-85748 Garching, Germany. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Helsinki, Observ, FIN-00014 Helsinki, Finland. Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland. Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. NASA, George C Marshall Space Flight Ctr, NSSTC, Huntsville, AL 35805 USA. Radboud Univ, Dept Astrophys, NL-6500 GL Nijmegen, Netherlands. RP Fynbo, JPU, Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. EM jfynbo@astro.ku.dk NR 36 TC 40 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2006 VL 451 IS 3 BP L47 EP L50 DI 10.1051/0004-6361:20065056 PG 4 SC Astronomy & Astrophysics GA 039TC UT ISI:000237329000007 ER PT J AU Orozco, G Sanchez, E Gomez, LM Gonzalez-Gay, MA Lopez-Nevot, MA Torres, B Ortego-Centeno, N Jimenez-Alonso, J de Ramon, E Roman, JS Anaya, JM Sturfelt, G Gunnarsson, I Svennungsson, E Alarcon-Riquelme, M Gonzalez-Escribano, MF Martin, J TI Study of the role of functional variants of SLC22A4, RUNX1 and SUMO4 in systemic lupus erythematosus SO ANNALS OF THE RHEUMATIC DISEASES LA English DT Article ID AUTOIMMUNE-DISEASE; KAPPA-B; CATION TRANSPORTER; CROHN-DISEASE; BINDING-SITE; SUSCEPTIBILITY; ASSOCIATION; GENE; GLOMERULONEPHRITIS; POLYMORPHISM AB Background: Functional polymorphisms of the solute carrier family 22, member 4 (SLC22A4), runt related transcription factor 1 (RUNX1) and small ubiquitin- like modifier 4 (SUMO4) genes have been shown to be associated with several autoimmune diseases. Objective: To test the possible role of these variants in susceptibility to or severity of systemic lupus erythematosus (SLE), on the basis that common genetic bases are shared by autoimmune disorders. Methods: 597 SLE patients and 987 healthy controls of white Spanish origin were studied. Two additional cohorts of 228 SLE patients from Sweden and 122 SLE patients from Colombia were included. A case control association study was carried out with six single nucleotide polymorphisms (SNP) spanning the SLC22A4 gene, one SNP in RUNX1 gene, and one additional SNP in SUM04 gene. Results: No significant differences were observed between SLE patients and healthy controls when comparing the distribution of the genotypes or alleles of any of the SLC22A4, RUNX1, or SUMO4 polymorphisms tested. Significant differences were found in the distribution of the SUMO4 genotypes and alleles among SLE patients with and without nephritis, but after multiple testing correction, the significance of the association was lost. The association of SUMO4 with nephritis could not be verified in two independent SLE cohorts from Sweden and Colombia. Conclusions: These results suggest that the SLC22A4, RUNX1, and SUMO4 polymorphisms analysed do not play a role in the susceptibility to or severity of SLE. C1 CSIC, Inst Parasitol & Biomed, Granada 18100, Spain. CIB, Unidad Biol Celular & Inmunol, Medellin, Colombia. Univ Antioquia, Medellin, Colombia. Hosp Xeral Calde, Serv Reumatol, Lugo, Spain. Hosp Virgen Nieves, Serv Inmunol, Granada, Spain. Hosp Virgen Rocio, Serv Inmunol, Seville, Spain. Hosp San Cecilia, Med Interna Serv, Granada, Spain. Hosp Virgen Nieves, Med Interna Serv, Granada, Spain. Hosp Carlos Haya, Med Interna Serv, Malaga, Spain. Hosp Virgen Rocio, Med Interna Serv, Seville, Spain. Univ Nacl Rosario, CIB, Unidad Biol Celular & Inmunol, Medellin, Colombia. Univ Lund Hosp, Dept Rheumatol, S-22185 Lund, Sweden. Karolinska Univ Hosp, Rheumatol Unit, Solna, Sweden. Univ Uppsala, Dept Genet & Pathol, Rudbeck Lab, Uppsala, Sweden. RP Martin, J, CSIC, Inst Parasitol & Biomed, Parque Tecnol Ciencias Salud,Ave Conocimiento S-N, Granada 18100, Spain. EM martin@ipb.csic.es NR 21 TC 0 PU B M J PUBLISHING GROUP PI LONDON PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND SN 0003-4967 J9 ANN RHEUM DIS JI Ann. Rheum. Dis. PD JUN PY 2006 VL 65 IS 6 BP 791 EP 795 DI 10.1136/ard.2005.044891 PG 5 SC Rheumatology GA 042FM UT ISI:000237513300017 ER PT J AU Adriano-Anaya, ML Salvador-Figueroa, M Ocampo, JA Garcia-Romera, I TI Hydrolytic enzyme activities in maize (Zea mays) and sorghum (Sorghum bicolor) roots inoculated with Gluconacetobacter diazotrophicus and Glomus intraradices SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article DE arbuscular mycorrhizal; endoglucanase; endopolymethylgalacturonase; endoxyloglucanase; Gluconacetobacter diazotrophicus; Glomus intraradices ID ARBUSCULAR MYCORRHIZAL FUNGI; BACTERIUM ACETOBACTER-DIAZOTROPHICUS; DINITROGEN FIXATION; WHEAT CULTIVARS; PLANT-GROWTH; SUGAR-CANE; INFECTION; MOSSEAE; RHIZOBIUM; COLONIZATION AB Two strains of Gluconacetobacter diazotrophicus (Pal 5, UAP5541) and the arbuscular mycorrhizal fungus Glomus intraradices increased both the shoot and root dry weight of sorghum 45 days after inoculation, whereas they had no effect on the shoot and root dry weight of maize. Co-inoculation (Gluconacetobacter diazotrophicus plus Gloinus mosseae) did not increase the shoot and root dry weight of either plant. There was a synergistic effect of Gluconacetobacter diazotrophicus on root colonization of maize by Glomus intraradices, whereas an antagonistic interaction was observed in the sorghum root where the number of Gluconacetobacter diazotrophicus and the colonization by Glomus intraradices were reduced. Plant roots inoculated with Glucottacetobacter diazotrophicus and Glomus intraradices, either separately or together, significantly increased root endoglucanase, endopolymethylgalacturonase and endoxyloglucanase activities. The increase varied according to the plant. For example, in comparison with non-inoculated plants, there were higher endoglucanase (+328%), endopolymethylgalacturonase (+ 180%) and endoxyloglucanase (+ 125%) activities in 45-day old co-inoculated maize, but not in 45-day old sorghum. The possibility is discussed that hydrolytic enzyme activities were increased as a result of inoculation with Gluconacetobacter diazotrophicus, considering this to be one of the mechanisms by which these bacteria may increase root colonization by AM fungi. (c) 2005 Elsevier Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Univ Autonoma Chiapas, Area Biotecnol, Chiapas 30700, Mexico. RP Ocampo, JA, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda I Apdo 419, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 38 TC 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD MAY PY 2006 VL 38 IS 5 BP 879 EP 886 DI 10.1016/j.soilbio.2005.08.004 PG 8 SC Soil Science GA 042RF UT ISI:000237545900004 ER PT J AU Tenorio-Tagle, G Munoz-Tunon, C Perez, E Silich, S Telles, E TI On the feedback from super stellar clusters. I. The structure of giant HII regions and HII galaxies SO ASTROPHYSICAL JOURNAL LA English DT Article DE HII regions; galaxies : ISM; galaxies : starburst; methods : numerical ID DYNAMICAL EVOLUTION; MOLECULAR CLOUDS; STAR-CLUSTERS; GAS; STARBURST; WINDS; NGC-604; HYDRODYNAMICS; TURBULENCE; DRIVEN AB We review the structural properties of giant extragalactic H (II) regions and H (II) galaxies based on two-dimensional hydrodynamic calculations and propose an evolutionary sequence that accounts for their observed detailed structure. The model assumes a massive and young stellar cluster surrounded by a large collection of clouds. These are thus exposed to the most important star formation feedback mechanisms: photoionization and the cluster wind. The models show how he two feedback mechanisms compete with each other in the disruption of clouds and lead to two different hydrodynamic solutions: the storage of clouds into a long-lasting ragged shell that inhibits the expansion of the thermalized wind and the steady filtering of the shocked wind gas through channels carved within the cloud stratum. Both solutions are here claimed to be concurrently at work in giant H (II) regions and H (II) galaxies, causing their detailed inner structure. This includes multiple large-scale shells, filled with an X-ray-emitting gas, that evolve to finally merge with each other, giving the appearance of shells within shells. The models also show how the inner filamentary structure of the giant superbubbles is largely enhanced with matter ablated from clouds and how cloud ablation proceeds within the original cloud stratum. The calculations point at the initial contrast density between the cloud and the intercloud media as the factor that defines which of the two feedback mechanisms becomes dominant throughout the evolution. Animated versions of the models presented can be found at http://www.iaa.csic.es/ similar to eperez/ssc/ssc.html. C1 Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico. Observ Nacl, BR-20921400 Rio De Janeiro, Brazil. RP Tenorio-Tagle, G, Inst Nacl Astrofis Opt & Elect, AP 51, Puebla 72000, Mexico. EM gtt@inaoep.mx cmt@ll.iac.es eperez@iaa.es silich@inaoep.mx etelles@on.br NR 38 TC 6 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2006 VL 643 IS 1 PN Part 1 BP 186 EP 199 PG 14 SC Astronomy & Astrophysics GA 043TP UT ISI:000237624900019 ER PT J AU Bersier, D Fruchter, AS Strolger, LG Gorosabel, J Levan, A Burud, I Rhoads, JE Becker, AC Cassan, A Chornock, R Covino, S De Jong, RS Dominis, D Filippenko, AV Hjorth, J Holmberg, J Malesani, D Mobasher, B Olsen, KAG Stefanon, M Ceron, JMC Fynbo, JPU Holland, ST Kouveliotou, C Pedersen, H Tanvir, NR Woosley, SE TI Evidence for a supernova associated with the X-ray flash 020903 SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts; supernovae : general ID GAMMA-RAY BURSTS; HUBBLE-SPACE-TELESCOPE; IMAGE SUBTRACTION; OPTICAL AFTERGLOW; UBVRI PHOTOMETRY; LOW-REDSHIFT; GRB 970508; SN 1998BW; FLASHES; LIGHT AB We present ground-based and Hubble Space Telescope optical observations of the X-ray flash ( XRF) 020903, covering 300 days. The afterglow showed a very rapid rise in the first day, followed by a relatively slow decay in the next few days. There was a clear bump in the light curve after similar to 25 days, accompanied by a drastic change in the spectral energy distribution. The light curve and the spectral energy distribution are naturally interpreted as describing the emergence and subsequent decay of a supernova ( SN), similar to SN 1998bw. At peak luminosity, the SN is estimated to be 0.8 +/- 0.1 mag fainter than SN 1998bw. This argues in favor of the existence of a SN associated with this XRF. A spectrum obtained 35 days after the burst shows emission lines from the host galaxy. We use this spectrum to put an upper limit on the oxygen abundance of the host at [O/H] <= 0.6 dex. We also discuss a possible trend between the softness of several bursts and the early behavior of the optical afterglow, in the sense that XRFs and X-ray-rich gamma-ray bursts ( GRBs) seem to have a plateau phase or even a rising light curve. This can be naturally explained in models in which XRFs are similar to GRBs but are seen off the jet axis. C1 Space Telescope Sci Inst, Baltimore, MD 21218 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Univ Washington, Dept Astron, Seattle, WA 98195 USA. Inst Astrophys, F-75014 Paris, France. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Osserv Astron Brera, INAF, I-23807 Merate, LC, Italy. Univ Potsdam, D-14469 Potsdam, Germany. Astrophys Inst Potsdam, D-14482 Potsdam, Germany. Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Tuorla Observ, FI-21500 Piikkio, Finland. SISSA, ISAS, I-34014 Trieste, Italy. Cerro Tololo Interamer Observ, Natl Opt Astron Observ, La Serena, Chile. NASA, Goddard Space Flight Ctr, Swift Sci Ctr, Greenbelt, MD 20771 USA. Univ Space Res Assoc, Columbia, MD 21044 USA. NASA, George C Marshall Space Flight Ctr, NSSTC, Huntsville, AL 35805 USA. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. RP Bersier, D, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA. NR 63 TC 11 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2006 VL 643 IS 1 PN Part 1 BP 284 EP 291 PG 8 SC Astronomy & Astrophysics GA 043TP UT ISI:000237624900029 ER PT J AU Fruchter, AS Levan, AJ Strolger, L Vreeswijk, PM Thorsett, SE Bersier, D Burud, I Ceron, JMC Castro-Tirado, AJ Conselice, C Dahlen, T Ferguson, HC Fynbo, JPU Garnavich, PM Gibbons, RA Gorosabel, J Gull, TR Hjorth, J Holland, ST Kouveliotou, C Levay, Z Livio, M Metzger, MR Nugent, PE Petro, L Pian, E Rhoads, JE Riess, AG Sahu, KC Smette, A Tanvir, NR Wijers, RAMJ Woosley, SE AF Fruchter, A. S. Levan, A. J. Strolger, L. Vreeswijk, P. M. Thorsett, S. E. Bersier, D. Burud, I. Castro Ceron, J. M. Castro-Tirado, A. J. Conselice, C. Dahlen, T. Ferguson, H. C. Fynbo, J. P. U. Garnavich, P. M. Gibbons, R. A. Gorosabel, J. Gull, T. R. Hjorth, J. Holland, S. T. Kouveliotou, C. Levay, Z. Livio, M. Metzger, M. R. Nugent, P. E. Petro, L. Pian, E. Rhoads, J. E. Riess, A. G. Sahu, K. C. Smette, A. Tanvir, N. R. Wijers, R. A. M. J. Woosley, S. E. TI Long gamma-ray bursts and core-collapse supernovae have different environments SO NATURE LA English DT Article ID HOST GALAXIES; LOW METALLICITY; MASSIVE STARS; IA SUPERNOVAE; REDSHIFT; AFTERGLOW; PROGENITORS; RATES; SPECTROSCOPY; CONSTRAINTS AB When massive stars exhaust their fuel, they collapse and often produce the extraordinarily bright explosions known as core-collapse supernovae. On occasion, this stellar collapse also powers an even more brilliant relativistic explosion known as a long-duration gamma-ray burst. One would then expect that these long gamma-ray bursts and core-collapse supernovae should be found in similar galactic environments. Here we show that this expectation is wrong. We find that the gamma-ray bursts are far more concentrated in the very brightest regions of their host galaxies than are the core-collapse supernovae. Furthermore, the host galaxies of the long gamma-ray bursts are significantly fainter and more irregular than the hosts of the core-collapse supernovae. Together these results suggest that long-duration gamma-ray bursts are associated with the most extremely massive stars and may be restricted to galaxies of limited chemical evolution. Our results directly imply that long gamma-ray bursts are relatively rare in galaxies such as our own Milky Way. C1 Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Western Kentucky Univ, Bowling Green, KY 42101 USA. European So Observ, Santiago 19, Chile. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England. Norwegian Meteorol Inst, N-0313 Oslo, Norway. Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. CALTECH, Pasadena, CA 91125 USA. Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Extraterr Planets & Stellar Astrophys Explorat Un, Greenbelt, MD 20771 USA. NASA, George C Marshall Space Flight Ctr, Natl Space Sci & Technol Ctr, Huntsville, AL 35805 USA. Renaissance Technol Corp, E Setauket, NY 11733 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Osserv Astron Trieste, INAF, I-34131 Trieste, Italy. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. RP Fruchter, AS, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA. EM fruchter@stsci.edu NR 50 TC 92 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAY 25 PY 2006 VL 441 IS 7092 BP 463 EP 468 DI 10.1038/nature04787 PG 6 SC Multidisciplinary Sciences GA 045YP UT ISI:000237778900040 ER PT J AU Mancebo, J Fernandez, R Blanch, L Rialp, G Gordo, F Ferrer, M Rodriguez, F Garro, P Ricart, P Vallverdu, I Gich, I Castano, J Saura, P Dominguez, G Bonet, A Albert, RK TI A Multicenter trial of prolonged prone ventilation in severe acute respiratory distress syndrome SO AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE LA English DT Article DE prone position; respiratory distress syndrome; adult; respiration; artificial ID RANDOMIZED CONTROLLED-TRIAL; INDUCED LUNG INJURY; END-EXPIRATORY PRESSURE; MECHANICAL VENTILATION; NITRIC-OXIDE; POSITION; PULMONARY; FAILURE; OXYGENATION; PREVENTION AB Rationale: Ventilation in the prone position for about 7 h/d in patients with acute respiratory distress syndrome (ARDS), acute lung injury, or acute respiratory failure does not decrease mortality. Whether it is beneficial to administer prone ventilation early, and for longer periods of time, is unknown. Methods: We enrolled 136 patients within 48 h of tracheal intubation for severe ARDS, 60 randomized to supine and 76 to prone ventilation. Guidelines were established for ventilator settings and weaning. The prone group was targeted to receive continuous prone ventilation treatment for 20 h/d. Results: The intensive care unit mortality was 58% (35/60) in the patients ventilated supine and 43% (33/76) in the patients ventilated prone (p = 0.12). The latter had a higher simplified acute physiology score II at inclusion. Multivariate analysis showed that simplified acute physiology score II at inclusion (odds ratio [OR], 1.07; p < 0.001), number of days elapsed between ARDS diagnosis and inclusion (OR, 2.83; p < 0.001), and randomization to supine position (OR, 2.53; p = 0.03) were independent risk factors for mortality. A total of 718 turning procedures were done, and prone position was applied for a mean of 17 h/d for a mean of 10 d. A total of 28 complications were reported, and most were rapidly reversible. Conclusion: Prone ventilation is feasible and safe, and may reduce mortality in patients with severe ARDS when it is initiated early and applied for most of the day. C1 Hosp Sant Pau, Serv Med Intens, Dept Intens Care Med, Barcelona 08025, Spain. Hosp Sant Pau, Serv Med Intens, Dept Epidemiol, Barcelona 08025, Spain. Inst Invest Biomed August Pi & Sunyer, Hosp Clin, Dept Intens Care Med, Resp Unit, Barcelona, Spain. Hosp Sabadell, Inst Univ Fundacio Parc, Dept Intens Care Med, Sabadell, Spain. Hosp Gen Mallorca, Palma de Mallorca, Spain. Fdn Hosp Alcorcon, Dept Intens Care Med, Alcorcon, Spain. Clin San Miguel, Dept Intens Care Med, Pamplona, Spain. Hosp Granollers, Dept Intens Care Med, Granollers, Spain. Hosp Germans Trias & Pujol, Dept Intens Care Med, Badalona, Spain. Hosp Sant Joan, Dept Intens Care Med, Reus, Spain. Hosp Virgen Nieves, Dept Intens Care Med, Granada, Spain. Ctr Hosp Manresa, Dept Intens Care Med, Manresa, Spain. Hosp Josep TRueta, Dept Intens Care Med, Girona, Spain. Inst Nacl Ciencias Med & Nutr Salvador, Dept Intens Care Med, Zubiran, DF, Mexico. Univ Colorado, Hlth Sci Ctr, Denver Hlth Med Ctr, Denver, CO USA. Univ Colorado, Hlth Sci Ctr, Dept Med, Denver, CO USA. RP Mancebo, J, Hosp Sant Pau, Serv Med Intens, Dept Intens Care Med, Maria Claret 167, Barcelona 08025, Spain. EM jmancebo@santpau.es NR 34 TC 33 PU AMER THORACIC SOC PI NEW YORK PA 1740 BROADWAY, NEW YORK, NY 10019-4374 USA SN 1073-449X J9 AMER J RESPIR CRIT CARE MED JI Am. J. Respir. Crit. Care Med. PD JUN 1 PY 2006 VL 173 IS 11 BP 1233 EP 1239 DI 10.1164/rccm.200503-353OC PG 7 SC Critical Care Medicine; Respiratory System GA 049BJ UT ISI:000237990100011 ER PT J AU Gomez, LM Anaya, JM Martin, J TI Genetic influence of PTPN22 R620W polymorphism in tuberculosis SO HUMAN IMMUNOLOGY LA English DT Article DE PTPN22; tuberculosis; tuberculin skin test; delayed-type hypersensitivity; autoimmunity ID PROTEIN-TYROSINE-PHOSPHATASE; SINGLE-NUCLEOTIDE POLYMORPHISM; MYCOBACTERIUM-TUBERCULOSIS; PULMONARY TUBERCULOSIS; RHEUMATOID-ARTHRITIS; ASSOCIATION; DISEASE; SUSCEPTIBILITY; AUTOIMMUNITY; ACTIVATION AB The PTPN22 gene codes for an intracellular lymphoid-specific phosphatase (Lyp) that has a negative regulatory effect on T-cell activation. Because Lyp is an important molecule involved in the inflammatory response, and its levels are increased in cells that participate in the immune response against Mycobacterium tuberculosis, we hypothesized that the functional PTPN22 C1858T polymorphism could be a genetic factor predisposing to the development of tuberculosis (TB). Accordingly, we undertook an association study in which 113 patients with pulmonary TB and 161 matched healthy controls stratified by the tuberculin skin test (TST) were examined. Significant skewing was observed when T allele frequencies of patients with TB and all controls were compared (P = 0.04, odds ratio = 0.3; 95% confidence interval = 0.08-1.04) and frequencies of patients with TB and TST+ healthy controls were compared (P = 0.01, odds ratio = 0.2; 95% confidence interval = 0.05-0.79). No stratification was detected between patients and control samples. These results suggest that the T allele may be a factor protecting against development of TB once the immune system recognizes M. tuberculosis (i.e., TST+ individuals), whereas the C allele may be a risk factor for development of overt TB. The results also indicate that an association opposite that between the PTPN22 polymorphism and TB exists between TB and autoimmunity. C1 CSIC, Inst Parasitol & Biomed, Granada 18100, Spain. Corp Invest Biol, Cellular Biol & Immunogenet Unit, Medellin, Colombia. Univ Rosario Medellin, Medellin, Colombia. RP Martin, J, CSIC, Inst Parasitol & Biomed, Parque Tecnol Ciencias Salud,Ave Conocimiento S-N, Granada 18100, Spain. EM martin@ipb.csic.es NR 37 TC 7 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0198-8859 J9 HUM IMMUNOL JI Hum. Immunol. PD DEC PY 2005 VL 66 IS 12 BP 1242 EP 1247 DI 10.1016/j.humimm.2005.11.008 PG 6 SC Immunology GA 050JI UT ISI:000238083100006 ER PT J AU Golimowski, DA Ardila, DR Krist, JE Clampin, M Ford, HC Illingworth, GD Bartko, F Benitez, N Blakeslee, JP Bouwens, RJ Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Cross, NJG Demarco, R Feldman, PD Franx, M Goto, T Gronwall, C Hartig, GF Holden, BP Homeier, NL Infante, L Jee, MJ Kimble, RA Lesser, MP Martel, AR Mei, S Menanteau, F Meurer, GR Miley, GK Motta, V Postman, M Rosati, P Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W Zirm, AW TI Hubble Space Telescope ACS multiband coronagraphic imaging of the debris disk around beta pictoris SO ASTRONOMICAL JOURNAL LA English DT Article DE circumstellar matter; planetary systems : formation; planetary systems : protoplanetary disks; stars : individual (beta Pictoris) ID KUIPER-BELT OBJECTS; CIRCUMSTELLAR DUST DISK; ADVANCED CAMERA; MIDINFRARED SPECTROSCOPY; STELLAR ENCOUNTERS; OPTICAL-PROPERTIES; INFALLING COMETS; COLOR DIVERSITY; AU-MICROSCOPII; SYSTEM AB We present F435W(B), F606W (broad V), and F814W(broad I) coronagraphic images of the debris disk around beta Pictoris obtained with the Hubble Space Telescope's Advanced Camera for Surveys. These images provide the most photometrically accurate and morphologically detailed views of the disk between 30 and 300 AU from the star ever recorded in scattered light. We confirm that the previously reported warp in the inner disk is a distinct secondary disk inclined by similar to 5 degrees from the main disk. The projected spine of the secondary disk coincides with the isophotal inflections, or "butterfly asymmetry,'' previously seen at large distances from the star. We also confirm that the opposing extensions of the main disk have different position angles, but we find that this "wing-tilt asymmetry'' is centered on the star rather than offset from it, as previously reported. The main disk's northeast extension is linear from 80 to 250 AU, but the southwest extension is distinctly bowed with an amplitude of similar to 1 AU over the same region. Both extensions of the secondary disk appear linear, but not collinear, from 80 to 150 AU. Within similar to 120 AU of the star, the main disk is similar to 50% thinner than previously reported. The surface brightness profiles along the spine of the main disk are fitted with four distinct radial power laws between 40 and 250 AU, while those of the secondary disk between 80 and 150 AU are fitted with single power laws. These discrepancies suggest that the two disks have different grain compositions or size distributions. The F606W/F435W and F814W/F435W flux ratios of the composite disk are nonuniform and asymmetric about both projected axes of the disk. The disk's northwest region appears 20%-30% redder than its southeast region, which is inconsistent with the notion that forward scattering from the nearer northwest side of the disk should diminish with increasing wavelength. Within similar to 120 AU, the m(F435W)-m(F606W) and m(F435W)-m(F814W) colors along the spine of the main disk are similar to 10% and similar to 20% redder, respectively, than those of beta Pic. These colors increasingly redden beyond similar to 120 AU, becoming 25% and 40% redder, respectively, than the star at 250 AU. These measurements overrule previous determinations that the disk is composed of neutrally scattering grains. The change in color gradient at similar to 120 AU nearly coincides with the prominent inflection in the surface brightness profile at similar to 115 AU and the expected water-ice sublimation boundary. We compare the observed red colors within similar to 120 AU with the simulated colors of nonicy grains having a radial number density alpha r(-3) and different compositions, porosities, and minimum grain sizes. The observed colors are consistent with those of compact or moderately porous grains of astronomical silicate and/or graphite with sizes greater than or similar to 0.15-0.20 mu m, but the colors are inconsistent with the blue colors expected from grains with porosities greater than or similar to 90%. The increasingly red colors beyond the ice sublimation zone may indicate the condensation of icy mantles on the refractory grains, or they may reflect an increasing minimum grain size caused by the cessation of cometary activity. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. CALTECH, Ctr Infrared Proc & Anal, Spitzer Sci Ctr, Pasadena, CA 91125 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA. Bartko Sci & Technol, Brighton, CO 80602 USA. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Metajiva, Edmonds, WA 98026 USA. Conceptual Anal LLC, Glenn Dale, MD 20769 USA. Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland. Leiden Observ, NL-2300 RA Leiden, Netherlands. Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. European So Observ, D-85748 Garching, Germany. WM Keck Observ, Kamuela, HI 96743 USA. RP Golimowski, DA, Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. NR 86 TC 17 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD JUN PY 2006 VL 131 IS 6 BP 3109 EP 3130 PG 22 SC Astronomy & Astrophysics GA 051QT UT ISI:000238176400028 ER PT J AU Monza, J Irisarri, P Az, PD' Delgado, MJ Mesa, S Bedmar, EJ AF Monza, Jorge Irisarri, Pilar Az, Pedro Di ' Delgado, Ma. Jesus Mesa, Socorro Bedmar, Eulogio J. TI Denitrification ability of rhizobial strains isolated from Lotus sp. SO ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY LA English DT Article DE 16S rDNA sequentiation; denitrification genes; gene probes; lotus rhizobia; nitrous oxide accumulation ID PERIPLASMIC NITRATE REDUCTASE; CONTAINING NITRITE REDUCTASE; BRADYRHIZOBIUM-JAPONICUM; OXIDE REDUCTASES; IDENTIFICATION; BACTERIA; GENES; EXPRESSION; SOILS; DNA AB Ten rhizobial strains isolated from Lotus sp. have been characterized by their ability to denitrify. Out of the 10 strains, the five slow-growing isolates grew well under oxygen-limiting conditions with nitrate as a sole nitrogen source, and accumulated nitrous oxide in the growth medium when acetylene was used to inhibit nitrous oxide reductase activity. All five strains contained DNA homologous to the Bradyrhizobium japonicum nirK, norBDQ and nosZ genes. In contrast, fast-growing lotus rhizobia were incapable of growing under nitrate-respiring conditions, and did not accumulate nitrous oxide in the growth medium. DNA from each of the five fast-growing strains showed a hybridization band with the B. japonicum nirK gene but not with norBDQ and nosZ genes. Partial 16S rDNA gene sequencing revealed that fast-growing strains could be identified as Mesorhizobium loti species and the slow-growers as Bradyrhizobium sp. C1 Univ Republica, Fac Agron, Lab Bioquim, Montevideo 12900, Uruguay. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18080 Granada, Spain. ETH Zentrum, LFV, Inst Mikrobiol, CH-8092 Zurich, Switzerland. RP Monza, J, Univ Republica, Fac Agron, Lab Bioquim, Ave Garzon 780, Montevideo 12900, Uruguay. EM jmonza@fagro.edu.uy NR 28 TC 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0003-6072 J9 ANTON LEEUWENHOEK INT J GEN M JI Antonie Van Leeuwenhoek PD MAY PY 2006 VL 89 IS 3-4 BP 479 EP 484 DI 10.1007/s10482-005-9046-6 PG 6 SC Microbiology GA 053RM UT ISI:000238322600021 ER PT J AU Humphrey, A Villar-Martin, M Fosbury, R Vernet, J Alighieri, SD TI Jet-gas interactions in z similar to 2.5 radio galaxies: evolution of the ultraviolet line and continuum emission with radio morphology SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE polarization; galaxies : active; galaxies : high-redshift; galaxies : jets; ultraviolet : ISM ID CLOUD INTERACTIONS; ACTIVE GALAXIES; STAR-FORMATION; REDSHIFT; SPECTROSCOPY; SPECTROPOLARIMETRY; IONIZATION; KINEMATICS; QUASARS; SHOCKS AB We present an investigation into the nature of the jet-gas interactions in a sample of 10 radio galaxies at 2.3 < z < 2.9 using deep spectroscopy of the ultraviolet (UV) line and continuum emission obtained at Keck II and the Very Large Telescope. Kinematically perturbed gas, which we have shown to be within the radio structure in previous publications, is always blueshifted with respect to the kinematically quiescent gas, is usually spatially extended, and is usually detected on both sides of the nucleus. In the three objects from this sample for which we are able to measure line ratios for both the perturbed and quiescent gases, we suggest that the former has a lower ionization state than the latter. We propose that the perturbed gas is part of a jet-induced outflow, with dust obscuring the outflowing gas that lies on the far side of the object. The spatial extent of the blueshifted perturbed gas, typically similar to 35 kpc, implies that the dust is spatially extended at least on similar spatial scales. We also find interesting interrelationships between UV line, UV continuum and radio continuum properties of this sample. C1 Univ Hertfordshire, Dept Phys Astron & Math, Hatfield AL10 9AB, Herts, England. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Space Telescope European Coordinating Facil, D-85748 Garching, Germany. European So Observ, D-85748 Garching, Germany. INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy. RP Humphrey, A, Univ Hertfordshire, Dept Phys Astron & Math, Hatfield AL10 9AB, Herts, England. EM ahumphre@astroscu.unam.mx NR 72 TC 9 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUL 1 PY 2006 VL 369 IS 3 BP 1103 EP 1114 DI 10.1111/j.1365-2966.2006.10224.x PG 12 SC Astronomy & Astrophysics GA 054CM UT ISI:000238353800007 ER PT J AU Paunzen, E Netopil, M Iliev, IK Maitzen, HM Claret, A Pintado, OI TI CCD photometric search for peculiar stars in open clusters VII. Berkeley 11, Berkeley 94, Haffner 15, Lynga 1, NGC 6031, NGC 6405, NGC 6834 and Ruprecht 130 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : chemically peculiar; stars : early-type; techniques : photometric; Galaxy : open clusters and associations : general ID 5200-ANGSTROM FLUX DEPRESSION; CHEMICALLY PECULIAR; DELTA-A; NGC 6031; PARAMETERS; CATALOG; SYSTEM; BE-94; UVBY AB Aims. The detection of magnetic chemically peculiar (CP2) stars in open clusters of the Milky Way can be used to study the influence of different galactic environments on the (non-)presence of peculiarities, which has to be taken into account in stellar evolution models. Furthermore it is still unknown if the CP2 phenomenon evolves, i.e. does the strength of the peculiarity feature at 5200 angstrom increase or decrease with age. Methods. We have observed eight young to intermediate age open clusters in the. a photometric system. This intermediate band photometric system samples the depth of the 5200 angstrom flux depression by comparing the flux at the center with the adjacent regions having bandwidths of 110 angstrom to 230 angstrom. The Delta a photometric system is most suitable to detect CP2 stars with high efficiency, but is also capable of detecting a small percentage of non-magnetic CP objects. Also, the groups of (metal-weak). Bootis, as well as classical Be/shell stars, can be successfully investigated. This photometric system allows one to determine the age, reddening and distance modulus by fitting isochrones. Results. Among the presented sample of eight galactic clusters, we have detected twenty three CP2, eight Be/Ae and eight metal-weak stars. Another six objects show a peculiar behaviour which is most probably due to a non-membership, variability or duplicity. Fitting isochrones to a photometry yields estimates of the age, reddening and distance that are in excellent agreement with published values. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Natl Astron Observ, Inst Astron, Smoljan 4700, Bulgaria. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Tucuman, Dept Fis, Fac Ciencias Exactas & Tecnol, Consejo Nacl Invest Cient & Tecn Repbul, RA-4000 San Miguel De Tucuman, Tucuman, Argentina. RP Paunzen, E, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM Ernst.Paunzen@univie.ac.at NR 41 TC 2 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2006 VL 454 IS 1 BP 171 EP 178 DI 10.1051/0004-6361:20054628 PG 8 SC Astronomy & Astrophysics GA 059IK UT ISI:000238726300022 ER PT J AU Sollerman, J Jaunsen, AO Fynbo, JPU Hjorth, J Jakobsson, P Stritzinger, M Feron, C Laursen, P Ovaldsen, JE Selj, J Thone, CC Xu, D Davis, T Gorosabel, J Watson, D Duro, R Ilyin, I Jensen, BL Lysfjord, N Marquart, T Nielsen, TB Naranen, J Schwarz, HE Walch, S Wold, M Ostlin, G AF Sollerman, J. Jaunsen, A. O. Fynbo, J. P. U. Hjorth, J. Jakobsson, P. Stritzinger, M. Feron, C. Laursen, P. Ovaldsen, J. -E. Selj, J. Thone, C. C. Xu, D. Davis, T. Gorosabel, J. Watson, D. Duro, R. Ilyin, I. Jensen, B. L. Lysfjord, N. Marquart, T. Nielsen, T. B. Naranen, J. Schwarz, H. E. Walch, S. Wold, M. Ostlin, G. TI Supernova 2006aj and the associated X-Ray Flash 060218 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; supernovae : individual : SN 2006aj ID GAMMA-RAY BURST; DIGITAL SKY SURVEY; INTERSTELLAR EXTINCTION; OPTICAL PHOTOMETRY; MAGELLANIC CLOUD; STANDARD STARS; SN 1998BW; GALAXIES; DUST; SPECTROSCOPY AB Aims. We have studied the afterglow of the gamma-ray burst (GRB) of February 18, 2006. This is a nearby long GRB, with a very low peak energy, and is therefore classified as an X-ray Flash (XRF). XRF 060218 is clearly associated with a supernova-dubbed SN2006aj. Methods. We present early spectra for SN2006aj as well as optical lightcurves reaching out to 50 days past explosion. Results. Our optical lightcurves define the rise times, the lightcurve shapes and the absolute magnitudes in the U, V and R bands, and we compare these data with data for other relevant supernovae. SN2006aj evolved quite fast, somewhat similarly to SN2002ap, but not as fast as SN1994I. Our spectra show the evolution of the supernova over the peak, when the U-band portion of the spectrum rapidly fades due to extensive line blanketing. We compare to similar spectra of very energetic type Ic supernovae. Our first spectra are earlier than spectra for any other GRB-SN. The spectrum taken 12 days after burst in the rest frame is similar to somewhat later spectra of both SN1998bw and SN2003dh, implying a rapid early evolution. This is consistent with the fast lightcurve. From the narrow emission lines from the host galaxy we derive a redshift of z = 0.0331 +/- 0.0007. This makes XRF 060218 the second closest gamma-ray burst detected. The flux of these emission lines indicate a high-excitation state, and a modest metallicity and star formation rate of the host galaxy. C1 Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark. Stockholm Observ, Dept Astron, AlbaNova, S-10691 Stockholm, Sweden. Inst Theoret Astrophys, N-0315 Oslo, Norway. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Astrophys, D-14482 Potsdam, Germany. Dept Astron & Space Sci, S-75120 Uppsala, Sweden. NOT, Santa Cruz De La Palma 38700, Spain. Univ Helsinki, Observ Helsinki, FIN-00014 Helsinki, Finland. Natl Opt Astron Observ, Cerro Tololo Interamer Observ, La Serena, Chile. Univ Observ Munich, D-81679 Munich, Germany. ESO, D-85744 Garching, Germany. RP Sollerman, J, Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark. NR 61 TC 30 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2006 VL 454 IS 2 BP 503 EP + DI 10.1051/0004-6361:20065226 PG 11 SC Astronomy & Astrophysics GA 063FW UT ISI:000239004300040 ER PT J AU Sanchez, E Gomez, LM Lopez-Nevot, MA Gonzalez-Gay, MA Sabio, JM Ortego-Centeno, N de Ramon, E Anaya, JM Gonzalez-Escribano, MF Koeleman, BP Martin, J AF Sanchez, E. Gomez, L. M. Lopez-Nevot, M. A. Gonzalez-Gay, M. A. Sabio, J. M. Ortego-Centeno, N. de Ramon, E. Anaya, J. M. Gonzalez-Escribano, M. F. Koeleman, B. P. Martin, J. TI Evidence of association of macrophage migration inhibitory factor gene polymorphisms with systemic lupus erythematosus SO GENES AND IMMUNITY LA English DT Article DE polymorphism; systemic lupus erythematosus; macrophage migration inhibitory factor; inflammation ID RHEUMATOID-ARTHRITIS; FACTOR MIF; AUTOIMMUNE-DISEASE; SUSCEPTIBILITY; SEVERITY; BIOMARKERS; REGION; PTPN22 AB The aim of this study was to evaluate the potential association of functional polymorphisms of macrophage migration inhibitory factor with systemic lupus erythematosus. Our study includes 711 systemic lupus erythematosus (SLE) patients and 755 healthy controls. We genotyped the migration inhibitory factor (MIF) -173G/C using a polymerase chain reaction (PCR) system with predeveloped TaqMan allelic discrimination assay and the MIF -794 CATT(n) microsatellite polymorphism using a PCR-fluorescent method. A statistically significant difference in the distribution of the MIF -173*C allele between SLE patients and controls (P = 0.004, OR 1.34, 95% CI 1.05-1.27) was observed. In addition, the frequency of the MIF -173*C/C genotype was higher in SLE patient (P = 0.002, OR 2.58, 95% CI 1.32-5.10). No differences in the distribution of CATTn were found. However, the haplotypes analyses showed that only the CATT(7)-MIF-173*C haplotype was associated with a higher susceptibility to SLE (P = 0.001, OR 1.84, 95% CI 1.35-2.79). No association with clinical features was detected in any case. These results suggest that both, MIF -173*C allele and CATT(7)-MIF-173*C haplotype, confer susceptibility to SLE in our population. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Armilla Granada 18100, Spain. CIB, Unidad Biol Celular & Inmunogenet, Medellin, Colombia. Hosp Virgen De Las Nieves, Serv Inmunol, Granada, Spain. Hosp Xeral Calde, Serv Reumatol, Lugo, Spain. Hosp Virgen Nieves, Med Interna Serv, Granada, Spain. Hosp Clin San Cecilio, Med Interna Serv, Granada, Spain. Hosp Carlos Haya, Med Interna Serv, Malaga, Spain. Univ Nacl Rosario, CIB, Unidad Biol Celular & Inmunogenet, Medellin, Colombia. Hosp Virgen Rocio, Serv Inmunol, Seville, Spain. Univ Utrecht, Med Ctr, Dept Biomed Genet, Utrecht, Netherlands. RP Martin, J, CSIC, Inst Parasitol & Biomed Lopez Neyra, Parque Tecnol Ciencias Salud,Ave Conocimiento S-N, Armilla Granada 18100, Spain. EM martin@ipb.csic.es NR 26 TC 11 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1466-4879 J9 GENES IMMUN JI Genes Immun. PD JUL PY 2006 VL 7 IS 5 BP 433 EP 436 DI 10.1038/sj.gene.6364310 PG 4 SC Genetics & Heredity; Immunology GA 067NK UT ISI:000239309700012 ER PT J AU Campos, A Sanchez-Quevedo, MC Fernandez-Segura, E Moreu, G Rodriguez, IA Alaminos, M AF Campos, A. Sanchez-Quevedo, M. C. Fernandez-Segura, E. Moreu, G. Rodriguez, I. A. Alaminos, M. TI Evaluation of the cytotoxicity of 2-hydroxymethylmethacrylate (HEMA) used as a biomaterial in tissue engineering SO CYTOTHERAPY LA English DT Meeting Abstract C1 Univ Granada, Dept Histol, Granada, Spain. Univ Granada, Dept Stomatol, Granada, Spain. Univ Cordoba, Dept Stomatol, Cordoba, Argentina. Fundac Hosp Clin, Granada, Spain. NR 0 TC 1 PU TAYLOR & FRANCIS AS PI OSLO PA PO BOX 12 POSTHUSET, NO-0051 OSLO, NORWAY SN 1465-3249 J9 CYTOTHERAPY JI Cytotherapy PY 2006 VL 8 SU Suppl. 2 BP 46 EP 46 PG 1 SC Biotechnology & Applied Microbiology; Cell Biology; Hematology; Medicine, Research & Experimental GA 067YD UT ISI:000239337800167 ER PT J AU Cuervo, C Lopez, MC Puerta, C AF Cuervo, Claudia Lopez, Manuel Carlos Puerta, Concepcion TI The Trypanosoma rangeli histone H2A gene sequence serves as a differential marker for KP1 strains SO INFECTION GENETICS AND EVOLUTION LA English DT Article DE histone H2A; Trypanosoma rangeli KPl(+); Trypanosoma rangeli KPl(-); KPl(-) minicircle; low-stringency single specific primer polymerase chain reaction (LSSP-PCR) ID MOLECULAR CHARACTERIZATION; COLOMBIAN STRAINS; LOW-STRINGENCY; CRUZI; PCR; H2A; SIGNATURES; KARYOTYPE; AMERICA; ORIGIN AB Typanosoma rangeli has recently been divided in two primary lineages denoted as KP1 (+) and KP1 (-) strains because of epidemiological and evolutionary interest in the molecular differentiation of these two groups. We report the molecular characterization of the genes encoding histone H2A protein from a T rangeli KP1(+) strain (H14), its comparison to T rangeli KPI(-) strain (C23) histone H2A coding genes [Puerta, C., Cuervo, P., Thomas, M.C., Lopez, M.C., 2000. Molecular characterization of the histone H2A gene from the parasite Trypanosoma rangeli. Parasitol. Res. 86, 916--922], and its application in a low-stringency single specific primer polymerase chain reaction (LSSP-PCR) assay to differentiate these parasite groups. The results show that the locus encoding the H2A protein in the H14 strain is formed by at least 11 gene units measuring 799 nucleotides in length, organized in tandem, and located in two chromosomes of approximately 1.9 and 1.1 Mb in size. Remarkably, in KPI(-) strains these genes are on pairs of chromosomes of about 1.7 and 1.9 Mb. In addition, there is a hybridization signal in the compression region above 2.1 Mb in all T. rangeli strains. Therefore, the chromosomal location of these genes is a useful marker to distinguish between KPI(+) and KPI(-) T. rangeli strains. The alignment of the H2A nucleotide sequences from H14 and C23 strains showed an identity of 99.5% between the coding regions and an identity of 95% between the non-coding regions. The deduced amino acid sequences proved to be identical. Based on 5% of the difference between the intergenic regions, we developed a LSSP-PCR assay which can differentiate between KPI(+) and KPI(-) strains. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ Javeriana, Fac Ciencias, Dept Microbiol, Mol Parasitol Lab,Lab 113, Bogota, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. RP Puerta, C, Univ Javeriana, Fac Ciencias, Dept Microbiol, Mol Parasitol Lab,Lab 113, Carrera 7,43-82,Edif 50, Bogota, Colombia. EM cpuerta@javeriana.edu.co NR 34 TC 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1567-1348 J9 INFECT GENET EVOL JI Infect. Genet. Evol. PD SEP PY 2006 VL 6 IS 5 BP 401 EP 409 DI 10.1016/j.meegid.2006.01.005 PG 9 SC Infectious Diseases GA 068IQ UT ISI:000239367500008 ER PT J AU Maiorano, E Masetti, N Palazzi, E Savaglio, S Rol, E Vreeswijk, PM Pian, E Price, PA Peterson, BA Jelinek, M Amati, L Andersen, MI Castro-Tirado, AJ Ceron, JMC Postigo, AD Frontera, F Fruchter, AS Fynbo, JPU Gorosabel, J Henden, AA Hjorth, J Jensen, BL Klose, S Kouveliotou, C Masi, G Moller, P Nicastro, L Ofek, EO Pandey, SB Rhoads, J Tanvir, NR Wijers, RAMJ van den Heuvel, EPJ AF Maiorano, E. Masetti, N. Palazzi, E. Savaglio, S. Rol, E. Vreeswijk, P. M. Pian, E. Price, P. A. Peterson, B. A. Jelinek, M. Amati, L. Andersen, M. I. Castro-Tirado, A. J. Cern, J. M. Castro de Ugarte Postigo, A. Frontera, F. Fruchter, A. S. Fynbo, J. P. U. Gorosabel, J. Henden, A. A. Hjorth, J. Jensen, B. L. Klose, S. Kouveliotou, C. Masi, G. Moller, P. Nicastro, L. Ofek, E. O. Pandey, S. B. Rhoads, J. Tanvir, N. R. Wijers, R. A. M. J. van den Heuvel, E. P. J. TI Physics of the GRB 030328 afterglow and its environment SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; radiation mechanisms : non-thermal; line : identification; cosmology : observations ID GAMMA-RAY BURST; SOUTHERN SPECTROPHOTOMETRIC STANDARDS; 28 FEBRUARY 1997; LINEAR-POLARIZATION; OPTICAL AFTERGLOW; LIGHT CURVES; SUPERNOVA 2003DH; ERROR BOX; SPECTROSCOPY; EMISSION AB Aims. To investigate the physical nature of the afterglow emission. We report on the photometric, spectroscopic and polarimetric observations of the optical afterglow of Gamma-Ray Burst (GRB) 030328 detected by HETE-2. Methods. Photometric, spectroscopic and polarimetric monitoring of the optical afterglow. Results. Photometry, collected at 7 different telescopes, shows that a smoothly broken powerlaw decay, with indices alpha(1) = 0.76 +/- 0.03, alpha(2) = 1.50 +/- 0.07 and a break at t(b) = 0.48 +/- 0.03 days after the GRB, provides the best fit of the optical afterglow decline. This shape is interpreted as due to collimated emission, for which we determine a jet opening angle theta(jet) similar to 3 degrees.2. An achromatic bump starting around similar to 0.2 d after the GRB is possibly marginally detected in the optical light curves. Optical spectroscopy shows the presence of two rest-frame ultraviolet metal absorption systems at z = 1.5216 +/- 0.0006 and at z = 1.295 +/- 0.001, the former likely associated with the GRB host galaxy. Analysis of the absorption lines at z = 1.5216 suggests that the host of this GRB may be a Damped Lyman-alpha Absorber. The optical V-band afterglow appears polarized, with P = (2.4 +/- 0.6)% and theta = 170 degrees +/- 7 degrees, suggesting an asymmetric blastwave expansion. An X-ray-to-optical spectral flux distribution of the GRB 030328 afterglow was obtained at 0.78 days after the GRB and fitted using a broken powerlaw, with an optical spectral slope beta(opt) = 0.47 +/- 0.15, and an X-ray slope beta(X) = 1.0 +/- 0.2. Conclusions. The discussion of the results in the context of the "fireball model" shows that the preferred scenario for this afterglow is collimated structured jet with fixed opening angle in a homogeneous medium. C1 INAF, Ist Astrofis Spaziale & Fis Cosm Bologna, I-40129 Bologna, Italy. INAF, Osservatorio Astron Trieste, I-34131 Trieste, Italy. Univ Bologna, Dipartmento Astron, I-40126 Bologna, Italy. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. European So Observ, Santiago 19, Chile. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Inst Astrophys, D-14482 Potsdam, Germany. Univ Copenhagen, Dark Cosmol Ctr, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Space Res Assoc, US Naval Observ, Flagstaff, AZ 86002 USA. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. NASA, MSFC, Huntsville, AL 35812 USA. Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy. European So Observ, D-85748 Garching, Germany. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Tel Aviv Univ, Wise Observ, IL-69978 Tel Aviv, Israel. ARIES Observ, Naini Tal 263129, Uttaranchal, India. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. RP Maiorano, E, INAF, Ist Astrofis Spaziale & Fis Cosm Bologna, Via Gobetti 101, I-40129 Bologna, Italy. EM maiorano@iasfbo.inaf.it NR 79 TC 2 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2006 VL 455 IS 2 BP 423 EP U13 DI 10.1051/0004-6361:20054728 PG 13 SC Astronomy & Astrophysics GA 070XM UT ISI:000239560000009 ER PT J AU Nila, AG Sandalio, LM Lopez, MG Gomez, M del Rio, LA Gomez-Lim, MA AF Nila, Alejandro G. Sandalio, Luisa M. Lopez, Mercedes G. Gomez, Manuel del Rio, Luis A. Gomez-Lim, Miguel A. TI Expression of a peroxisome proliferator-activated receptor gene (xPPAR alpha) from Xenopus laevis in tobacco (Nicotiana tabacum) plants SO PLANTA LA English DT Article DE acyl-CoA oxidase; clofibrate; Nicotiana tabacum; peroxisomes; peroxisome proliferator-activated receptor ID FATTY-ACIDS; NITRIC-OXIDE; BETA-OXIDATION; TRANSGENIC TOBACCO; PPAR-GAMMA; DESATURASE; METABOLISM; MECHANISMS; YEAST; IDENTIFICATION AB In this work, we have genetically transformed tobacco (Nicotiana tabacum) plants with the peroxisome proliferator-activated receptor cDNA (xPPAR alpha) from Xenopus laevis, which is a transcriptional factor involved in the peroxisomal proliferation and induction of fatty acid beta-oxidation in animal cells. Several transgenic lines were generated and one representative line (T) from the R2 generation was selected for further studies. Analysis of free fatty acids revealed that unsaturated fatty acids such as C16:2 and C16:3 were deficient in line T, whereas saturated fatty acids like C16:0, C18:0, and C20:0 were more abundant than in non-transformed plants. Acyl-CoA oxidase (ACOX) activity was assayed as a marker enzyme of beta-oxidation in crude leaf extracts and it was found that in line T there was a threefold increase in enzyme activity. We also found that the peroxisome population was increased and that catalase (CAT) activity was induced by clofibrate, a known activator of xPPAR alpha protein, in leaves from line T. Taken together, these findings suggest that xPPAR alpha is functional in plants and that its expression in tobacco leads to changes in general lipid metabolism and peroxisomal proliferation as reported in animal cells. Furthermore, it indicates that there is an endogenous ligand in tobacco cells able to activate xPPAR alpha. C1 CINVESTAV, Dept Ingn Genet, Irapuato 36500, Gto, Mexico. CSIC, Dept Bioquim Biol Celular & Mol Plantas, Estac Expt Zaidin, E-18080 Granada, Spain. CSIC, Dept Agroecol & Protec Vegetal, Estac Expt Zaidin, E-18080 Granada, Spain. RP Gomez-Lim, MA, CINVESTAV, Dept Ingn Genet, Km 9-6,Carretera Irapuato Leon,Apartado Postal 62, Irapuato 36500, Gto, Mexico. EM mgomez@ira.cinvestav.mx NR 50 TC 3 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0032-0935 J9 PLANTA JI Planta PD AUG PY 2006 VL 224 IS 3 BP 569 EP 581 DI 10.1007/s00425-006-0246-8 PG 13 SC Plant Sciences GA 071HZ UT ISI:000239591900008 ER PT J AU Gros, L Castillo-Acosta, VM Jimenez, CJ Sealey-Cardona, M Vargas, S Estevez, AM Yardley, V Rattray, L Croft, SL Ruiz-Perez, LM Urbina, JA Gilbert, IH Gonzalez-Pacanowska, D AF Gros, Ludovic Castillo-Acosta, Victor Manuel Jimenez Jimenez, Carmen Sealey-Cardona, Marco Vargas, Sofia Manuel Estevez, Antonio Yardley, Vanessa Rattray, Lauren Croft, Simon L. Ruiz-Perez, Luis M. Urbina, Julio A. Gilbert, Ian H. Gonzalez-Pacanowska, Dolores TI New azasterols against Trypanosoma brucei: Role of 24-sterol methyltransferase in inhibitor action SO ANTIMICROBIAL AGENTS AND CHEMOTHERAPY LA English DT Article ID METHYL TRANSFERASE INHIBITORS; SCHIZOTRYPANUM CRUZI; STEROL BIOSYNTHESIS; IN-VITRO; KETOCONAZOLE; COMBINATIONS; ANALOGS; FORMS AB A series of azasterol derivatives, designed as potential inhibitors of the Delta(24)-sterol methyltransferase enzyme (24-SMT), were synthesized and evaluated for their activities against parasitic protozoa. Values in the nanomolar range were obtained for 50% effective dose against the Trypanosoma brucei subsp. rhodesiense bloodstream form cultured in vitro. In order to investigate the mode of action, Trypanosoma brucei subsp. brucei 24-SMT was cloned and overexpressed and compounds were assayed for inhibitory activity. None of the inhibitors tested appeared to be active against the enzyme. Sterol composition analysis showed that only cholestane type sterols are present in membranes of bloodstream forms while ergosterol is a major component of procyclic sterol extracts. Interestingly, Northern blot analysis showed the presence of 24-SMT mRNA in both the procyclic and the bloodstream forms of the parasite, although levels of mRNA were threefold lower in the latter. Likewise, Western blot analysis and activity determinations evidenced the existence of actives enzyme in both forms of the parasite. We conclude that the designed compounds act at sites other than 24-SMT in Trypanosoma brucei. C1 Consejo Super Invest Cientificas, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Univ Cardiff Wales, Welsh Sch Pharm, Cardiff CF10 3XF, Wales. Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Med, London WC1E 7HT, England. IVIC, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020, Venezuela. RP Gonzalez-Pacanowska, D, Consejo Super Invest Cientificas, Inst Parasitol & Biomed Lopez Neyra, Avda Conocimienta S-N,Parque Tecnol Ciencias Salu, Granada, Spain. EM dgonzalez@ipb.csic.es NR 26 TC 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0066-4804 J9 ANTIMICROB AGENTS CHEMOTHER JI Antimicrob. Agents Chemother. PD AUG PY 2006 VL 50 IS 8 BP 2595 EP 2601 DI 10.1128/AAC.01508-05 PG 7 SC Microbiology; Pharmacology & Pharmacy GA 071YS UT ISI:000239640400001 ER PT J AU Levan, A Fruchter, A Rhoads, J Mobasher, B Tanvir, N Gorosabel, J Rol, E Kouveliotou, C Dell'Antonio, I Merrill, M Bergeron, E Ceron, JM Masetti, N Vreeswijk, P Antonelli, A Bersier, D Castro-Tirado, A Fynbo, J Garnavich, P Holland, S Hjorth, J Nugent, P Pian, E Smette, A Thomsen, B Thorsett, SE Wijers, R AF Levan, Andrew Fruchter, Andrew Rhoads, James Mobasher, Bahram Tanvir, Nial Gorosabel, Javier Rol, Evert Kouveliotou, Chryssa Dell'Antonio, Ian Merrill, Michael Bergeron, Eddie Castro Ceron, Jose Maria Masetti, Nicola Vreeswijk, Paul Antonelli, Angelo Bersier, David Castro-Tirado, Alberto Fynbo, Johan Garnavich, Peter Holland, Stephen Hjorth, Jens Nugent, Peter Pian, Elena Smette, Alain Thomsen, Bjarne Thorsett, Stephen E. Wijers, Ralph TI Infrared and optical observations of GRB 030115 and its extremely red host galaxy: Implications for dark bursts SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : high-redshift; gamma rays : bursts ID GAMMA-RAY BURSTS; HUBBLE-SPACE-TELESCOPE; X-RAY; STARBURST GALAXIES; DUST EXTINCTION; BAND AFTERGLOW; STAR-FORMATION; BRIGHT; SUBMILLIMETER; SUPERNOVA AB We present near-infrared (NIR) and optical observations of the afterglow of GRB 030115. Discovered in an infrared search at Kitt Peak 5 hr after the burst trigger, this afterglow is the faintest ever observed in the R band at such an early epoch and exhibits very red colors, with R - K approximate to 6. The optical magnitude of the afterglow of GRB 030115 is fainter than many upper limits for other bursts, suggesting that without early NIR observations it would have been classified as a "dark'' burst. Both the color and optical magnitude of the afterglow are likely due to dust extinction at moderate redshift z > 2 and indicate that at least some optical afterglows are very faint due to dust along the line of sight. Multicolor Hubble Space Telescope observations were also taken of the host galaxy and the surrounding field. Photometric redshifts imply that the host and a substantial number of faint galaxies in the field are at z similar to 2.5. The overdensity of galaxies is sufficiently great that GRB 030115 may have occurred in a rich high-redshift cluster. The host galaxy shows extremely red colors (R - K = 5) and is the first GRB host to be classified as an extremely red object (ERO). Some of the galaxies surrounding the host also show very red colors, while the majority of the cluster are much bluer, indicating ongoing unobscured star formation. As it is thought that much of high-redshift star formation occurs in highly obscured environments, it may well be that GRB 030115 represents a transition object, between the relatively unobscured afterglows seen to date and a population of objects that are very heavily extinguished, even in the NIR. C1 Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. CSIC, IAA, E-18080 Granada, Spain. Univ Amsterdam, Inst Astron, NL-1098 SJ Amsterdam, Netherlands. NASA, MSFC, NSSTC, Huntsville, AL 35805 USA. Brown Univ, Dept Phys, Providence, RI 02912 USA. Natl Opt Astron Observ, Tucson, AZ 85726 USA. Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, CNR, I-40129 Bologna, Italy. European So Observ, Santiago 19, Chile. Osserv Astron Roma, I-00040 Monte Porzio Catone, Italy. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, Denmark. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. USN Observ, Flagstaff, AZ 86002 USA. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Osserv Astron Trieste, I-34131 Trieste, Italy. Univ Liege, Inst Astrophys & Geophys, B-4000 Cointe Ougree, Belgium. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. RP Levan, A, Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. NR 81 TC 14 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2006 VL 647 IS 1 PN Part 1 BP 471 EP 482 PG 12 SC Astronomy & Astrophysics GA 072BO UT ISI:000239647800040 ER PT J AU Rodriguez, N Campos, W Lopez, M AF Rodriguez, N. Campos, W. Lopez, M. TI Calibration of a respiratory chamber for calorimetry studies. SO JOURNAL OF ANIMAL SCIENCE LA English DT Meeting Abstract DE respirometry; calorimetry; chamber C1 Univ Fed Minas Gerais, Belo Horizonte, MG, Brazil. Consejo Super Invest Cient, Granada, Spain. NR 0 TC 0 PU AMER SOC ANIMAL SCIENCE PI SAVOY PA 1111 NORTH DUNLAP AVE, SAVOY, IL 61874 USA SN 0021-8812 J9 J ANIM SCI JI J. Anim. Sci. PY 2006 VL 84 SU Suppl. 1 BP 359 EP 359 PG 1 SC Agriculture, Dairy & Animal Science GA 074DS UT ISI:000239793501394 ER PT J AU De la vega Elena, DA Oyonarte, S Nogues, N Blanzaco, PD Theiller, E Raillon, MA Chialina, S Solis, E Fernandez Montoya, A Crespo Ferrer, V Campos Munoz, A Muniz-Diaz, E AF De la vega Elena, D. A. Oyonarte, S. Dr. Nogues, N. dr. Blanzaco, P. D. prof. Theiller, E. dr. Raillon, M. A. dr. Chialina, S. dr. Solis, E. prof. Fernandez Montoya, A. dr. Crespo Ferrer, V. prof. Campos Munoz, A. prof. Muniz-Diaz, E. dr TI Characterization of human platelet antigens in the Argentinean population SO VOX SANGUINIS LA English DT Meeting Abstract C1 Hosp Italiano Garibaldi, Rosario, Santa Fe, Argentina. CRTS Granada Almeria, Granada, Spain. Banc Sang & Teixits, Barcelona, Spain. FBCB UNL, Santa Fe, Argentina. Dept Histol UGr, Granada, Spain. NR 0 TC 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0042-9007 J9 VOX SANG JI Vox Sang. PD AUG PY 2006 VL 91 SU Suppl. 3 BP 263 EP 264 PG 2 SC Hematology GA 077AE UT ISI:000239999300657 ER PT J AU Luz, D Civeit, T Courtin, R Lebreton, JP Gautier, D Witasse, O Kaufer, A Ferri, F Lara, L Livengood, T Kostiuk, T AF Luz, D. Civeit, T. Courtin, R. Lebreton, J. -P. Gautier, D. Witasse, O. Kaufer, A. Ferri, F. Lara, L. Livengood, T. Kostiuk, T. TI Characterization of zonal winds in the stratosphere of Titan with UVES: 2. Observations coordinated with the Huygens Probe entry SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID TROPOSPHERIC CLOUDS; ATMOSPHERE; TEMPERATURES; OCCULTATION; DYNAMICS AB The Huygens Probe has successfully entered Titan's atmosphere and landed on its surface on 14 January 2005. With the aim of characterizing the zonal wind flow in Titan's stratosphere close to the time of entry, coordinated observations were carried out at the Very Large Telescope on the nights of 7, 12, 14, and 15 January. As in our previous investigation (Luz et al., 2005), we used the UVES instrument, mounted on the Kueyen-UT2 telescope, simultaneously achieving high spectral resolving power and high spatial resolution. The field has been derotated in order to align the 0.3-arcsec aperture perpendicularly to Titan's rotation axis. In this configuration, spatial information in the east-west direction is preserved in a set of spectra in the direction perpendicular to dispersion. We present measurements of zonal winds obtained with the technique of absolute accelerometry. The observations were made in the wavelength range 4200-6200 angstrom, probing between 115 and 280 km, with peak contributions at 200 and 170 km for the lower and upper parts of the domain. We detect prograde zonal winds with lower limits 46 and 53 ms(-1) at these altitudes. These values are close to our previous measurements. C1 Univ Lisbon, Ctr Astron & Astrofis, Observ Astron Lisboa, P-1349018 Lisbon, Portugal. Observ Paris, Sect Meudon, Lab Etud Spatiales & Instrumentat Astrophys, F-92195 Meudon, France. European Space Agcy, Estec, Res & Sci Support Dept, NL-2200 AG Noordwijk, Netherlands. European So Observ, Santiago 19, Chile. Univ Padua, CISAS, I-35131 Padua, Italy. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RP Luz, D, Univ Lisbon, Ctr Astron & Astrofis, Observ Astron Lisboa, P-1349018 Lisbon, Portugal. EM dluz@oal.ul.pt NR 30 TC 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-PLANETS JI J. Geophys. Res.-Planets PD AUG 23 PY 2006 VL 111 IS E8 AR E08S90 DI 10.1029/2005JE002617 PG 8 SC Geochemistry & Geophysics GA 078KK UT ISI:000240101500002 ER PT J AU Pian, E Mazzali, PA Masetti, N Ferrero, P Klose, S Palazzi, E Ramirez-Ruiz, E Woosley, SE Kouveliotou, C Deng, J Filippenko, AV Foley, RJ Fynbo, JPU Kann, DA Li, W Hjorth, J Nomoto, K Patat, F Sauer, DN Sollerman, J Vreeswijk, PM Guenther, EW Levan, A O'Brien, P Tanvir, NR Wijers, RAMJ Dumas, C Hainaut, O Wong, DS Baade, D Wang, L Amati, L Cappellaro, E Castro-Tirado, AJ Ellison, S Frontera, F Fruchter, AS Greiner, J Kawabata, K Ledoux, C Maeda, K Moller, P Nicastro, L Rol, E Starling, R AF Pian, E. Mazzali, P. A. Masetti, N. Ferrero, P. Klose, S. Palazzi, E. Ramirez-Ruiz, E. Woosley, S. E. Kouveliotou, C. Deng, J. Filippenko, A. V. Foley, R. J. Fynbo, J. P. U. Kann, D. A. Li, W. Hjorth, J. Nomoto, K. Patat, F. Sauer, D. N. Sollerman, J. Vreeswijk, P. M. Guenther, E. W. Levan, A. O'Brien, P. Tanvir, N. R. Wijers, R. A. M. J. Dumas, C. Hainaut, O. Wong, D. S. Baade, D. Wang, L. Amati, L. Cappellaro, E. Castro-Tirado, A. J. Ellison, S. Frontera, F. Fruchter, A. S. Greiner, J. Kawabata, K. Ledoux, C. Maeda, K. Moller, P. Nicastro, L. Rol, E. Starling, R. TI An optical supernova associated with the X-ray flash XRF 060218 SO NATURE LA English DT Article ID LOW-LUMINOSITY; LIGHT-CURVE; BURST; AFTERGLOW; MODELS; GRB-030329; GRB-031203; DISCOVERY; SN-2006AJ; EMISSION AB Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae(1) that are more luminous than average(2-5) and that eject material at very high velocities. Less-luminous supernovae were not hitherto known to be associated with GRBs, and therefore GRB - supernovae were thought to be rare events(6). Whether X-ray flashes - analogues of GRBs, but with lower luminosities and fewer gamma-rays - can also be associated with supernovae, and whether they are intrinsically 'weak' events or typical GRBs viewed off the axis of the burst(7), is unclear. Here we report the optical discovery and follow-up observations of the type Ic supernova SN 2006aj associated with X-ray flash XRF 060218. Supernova 2006aj is intrinsically less luminous than the GRB - supernovae, but more luminous than many supernovae not accompanied by a GRB. The ejecta velocities derived from our spectra are intermediate between these two groups, which is consistent with the weakness of both the GRB output(8) and the supernova radio flux(9). Our data, combined with radio and X-ray observations(8-10), suggest that XRF 060218 is an intrinsically weak and soft event, rather than a classical GRB observed off-axis. This extends the GRB - supernova connection to X-ray flashes and fainter supernovae, implying a common origin. Events such as XRF 060218 are probably more numerous than GRB - supernovae. C1 Trieste Astron Observ, Ist Nazl Astrofis, I-34131 Trieste, Italy. Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA. Max Planck Inst Astrophys, D-85748 Garching, Germany. Univ Tokyo, Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan. Univ Tokyo, Sch Sci, Res Ctr Early Universe, Bunkyo Ku, Tokyo 1130033, Japan. IASF, Ist Nazl Astrofis, I-40129 Bologna, Italy. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Inst Adv Study, Princeton, NJ 08540 USA. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. NASA, MSFC, NSSTC, Huntsville, AL 35805 USA. Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark. European So Observ, D-85748 Garching, Germany. Stockholm Univ, Dept Astron, S-10691 Stockholm, Sweden. Univ Chile, Dept Astron, Santiago, Chile. European So Observ, Santiago 19, Chile. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Univ Leicester, Dept Phys & Astron, Xray & Observat Astron Grp, Leicester LE1 7RH, Leics, England. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Padova Astron Observ, Ist Nazl Astrofis, I-35122 Padua, Italy. CSIC, IAA, E-18080 Granada, Spain. Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada. Univ Ferrara, Dept Phys, I-44100 Ferrara, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan. Univ Tokyo, Coll Arts & Sci, Dept Earth Sci & Astron, Meguro Ku, Tokyo 1538902, Japan. RP Pian, E, Trieste Astron Observ, Ist Nazl Astrofis, Via GB Tiepolo 11, I-34131 Trieste, Italy. EM pian@oats.inaf.it NR 30 TC 68 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 31 PY 2006 VL 442 IS 7106 BP 1011 EP 1013 DI 10.1038/nature05082 PG 3 SC Multidisciplinary Sciences GA 078YF UT ISI:000240142000042 ER PT J AU Miranda, LF Ayala, S Vazquez, R Guillen, PF AF Miranda, L. F. Ayala, S. Vazquez, R. Guillen, P. F. TI IC 5217 as a double-shell, point-symmetric planetary nebula with a very narrow waist SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE planetary nebulae : individual : IC 5217; ISM : jets and outflows ID BIPOLAR; RADIATION; EVOLUTION; OUTFLOW; BUBBLES; WINDS AB Aims. Identification of the structural components and analysis of the internal kinematics in the planetary nebula IC 5217. Methods. Narrow- band images and high resolution long- slit spectra in the H alpha, [N II] and [O III] emission lines, and VLA 6 cm continuum data. Results. IC 5217 is composed of a very bright equatorial ring, open bipolar lobes, alpha- axis point- symmetric features, on- axis distant faint regions, and an off- axis very elongated bipolar structure. The ring, open lobes, point- symmetric features and distant faint regions appear as elements of a single point- symmetric bipolar shell with a very narrow waist. This shell presents an axis ratio of similar to 37 and an aspect ratio of similar to 5. The 6 cm data show that the ring is an extremely flat disk with a central hole. Expansion velocity in the ring ranges from <= 10 km s(-1) in He II up to similar or equal to 27 km s(-1) in [N II], whereas a velocity of similar to 460 km s(-1) is estimated for the polar regions of the bipolar shell. Strong acceleration of the outer regions of the ring is observed. The elongated bipolar structure probably represents a highly collimated (aspect ratio similar to 12), high velocity cylindrical- like shell. A collimated agent (wind or jet) would account for the shaping of the bipolar shell if this agent has operated in the direction perpendicular to the equatorial disk. The point- symmetric features and cylindrical shell are probably related to collimated ejections but that occurred when the basic nebular shape had already been established. C1 CSIC, Inst Astrofis Andalucia, Granada 18008, Spain. UNAM, Astron Inst, Ensenada 22800, Baja California, Mexico. RP Miranda, LF, CSIC, Inst Astrofis Andalucia, Camino Bajo Huetor 50, Granada 18008, Spain. EM lfm@iaa.es sayala@iaa.es vazquez@astrosen.unam.mx fguillen@astrosen.unam.mx NR 26 TC 2 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2006 VL 456 IS 2 BP 591 EP 597 DI 10.1051/0004-6361:20065542 PG 7 SC Astronomy & Astrophysics GA 080IZ UT ISI:000240242400019 ER PT J AU Scervino, JM Ponce, MA Erra-Bassells, R Bompadre, MJ Vierheilig, H Ocampo, JA Godeas, A AF Scervino, J. M. Ponce, M. A. Erra-Bassells, R. Bompadre, M. J. Vierheilig, H. Ocampo, J. A. Godeas, A. TI Glycosidation of apigenin results in a loss of its activity on different growth parameters of arbuscular mycorrhizal fungi from the genus Glomus and Gigaspora SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article DE arbuscular mycorrhiza; glomeromycota; flavonoid; apigenin; signal molecule; symbiosis ID HYPHAL GROWTH; ROOT EXUDATE; FLAVONOIDS; INVITRO; HOST; INFECTIONS; SPORE AB The effect of different concentrations (0.5, 2 and 8 mu M) of apigenin and its glycosidated form 5,7,4'-hydroxy flavone glycoside on arbuscular mycorrhizal (AM) fungal spore germination, hyphal growth, hyphal branching, the formation of entry points and root colonization of Gigaspora. rosea, Gi. margarita, Glomus mosseae and G. intraradices was tested. The lowest apigenin concentration (0.5 mu M) nearly doubled hyphal branching, the formation of entry points and root colonization of all four tested fungi, whereas higher concentrations (2 and 8 mu M) nearly doubled the hyphal growth of Gi. margarita, G. mosseae and G. intraradices. In none of the treatments with the apigenin-glycoside any effect on AM fungi could be observed. Our data show that apigenin exhibits an AM fungal genus and even species activity and we provide strong evidence that glycosidation results in a loss of its activity towards AM fungi. (c) 2006 Elsevier Ltd. All rights reserved. C1 CSIC, Dept Microbiol, Estacion Expt Zaidin, E-18008 Granada, Spain. Agr Univ Vienna, Dept Angewandte Pflanzenwissenschaft & Pflanzenbi, Inst Pflanzenschutz, A-1190 Vienna, Austria. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Organ, CONICET,CIHIDECAR, RA-1428 Buenos Aires, DF, Argentina. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Biodivers & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. RP Ocampo, JA, CSIC, Dept Microbiol, Estacion Expt Zaidin, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 24 TC 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD SEP PY 2006 VL 38 IS 9 BP 2919 EP 2922 DI 10.1016/j.soilbio.2006.05.002 PG 4 SC Soil Science GA 080TD UT ISI:000240270300044 ER PT J AU Kehrig, C Vilchez, JM Telles, E Cuisinier, F Perez-Montero, E AF Kehrig, C. Vilchez, J. M. Telles, E. Cuisinier, F. Perez-Montero, E. TI A spectroscopic study of the near-IR [SIII] lines in a sample of HII galaxies: chemical abundances SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : abundances; HII regions; galaxies : abundances; galaxies : dwarf; galaxies : evolution ID H-II REGIONS; COMPACT DWARF GALAXIES; EMPIRICAL CALIBRATION; IONIZATION STRUCTURE; NEBULAR ABUNDANCES; SOUTHERN GALAXIES; MAGELLANIC CLOUDS; OXYGEN ABUNDANCE; IONIZING STARS; MASSIVE STARS AB Aims. A detailed spectroscopic study covering the blue to near-infrared wavelength range (.3700 angstrom-1 mu m) was performed for a sample of 34 HII galaxies in order to derive fundamental parameters for their HII regions and ionizing sources, as well as gaseous metal abundances. All the spectra included the nebular [SIII]lambda lambda 9069,9532 angstrom lines, given their importance in the derivation of the S/H abundance and relevant ionization diagnostics. Methods. A systematic method was followed to correct the near-IR [SIII] line fluxes for the effects of the atmospheric transmission. A comparative analysis of the predictions of the empirical abundance indicators R-23 and S-23 was performed for our sample galaxies. The relative hardness of their ionizing sources was studied using the. eta' parameter and exploring the role played by metallicity. Results. For 22 galaxies of the sample, a value of the electron temperature T-e[SIII] was derived, along with their ionic and total S/H abundances. Their ionic and total O/H abundances were derived using direct determinations of T-e[OIII]. For the rest of the objects, the total S/H abundance was derived using the S 23 calibration. The abundance range covered by our sample goes from 1/20 solar up to solar metallicity. Six galaxies present 12+log (O/H) <7.8 dex. The mean S/O ratio derived in this work is log (S/O) = -1.68 +/- 0.20 dex, 1 sigma below the solar (S/O)(circle dot) value. The S/O abundance ratio shows no significant trend with O/H over the range of abundance covered in this work, in agreement with previous findings. There is a trend for HII galaxies with lower gaseous metallicity to present harder ionizing spectra. We compared the distribution of the ionic ratios O+/O++ vs. S+/S++ derived for our sample with the predictions of a grid of photoionization models performed for three different stellar effective temperatures. This analysis indicates that a large fraction of galaxies in our sample seem to be ionized by extremely hard spectra, in line with recent suggestions for extra ionizing sources in HII galaxies. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Observ Nacl, BR-20921400 Rio De Janeiro, Brazil. UFRJ, Observ Valongo, GEMAC, BR-20080090 Rio De Janeiro, Brazil. Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain. RP Kehrig, C, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. EM kehrig@iaa.es jvm@iaa.es kehrig@on.br francois@ov.ufrj.br enrique.perez@uam.es NR 55 TC 3 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2006 VL 457 IS 2 BP 477 EP U107 DI 10.1051/0004-6361:20054488 PG 11 SC Astronomy & Astrophysics GA 084NQ UT ISI:000240540400010 ER PT J AU Lacasana, M Vazquez-Grameix, H Borja-Aburto, VH Blanco-Munoz, J Romieu, I Aguilar-Garduno, C Garcia, AM AF Lacasana, M. Vazquez-Grameix, H. Borja-Aburto, V. H. Blanco-Munoz, J. Romieu, I. Aguilar-Garduno, C. Garcia, A. M. TI Maternal and paternal occupational exposure to agricultural work and the risk of anencephaly SO OCCUPATIONAL AND ENVIRONMENTAL MEDICINE LA English DT Article ID NEURAL-TUBE DEFECTS; LIMB REDUCTION DEFECTS; PESTICIDE EXPOSURE; CONGENITAL-MALFORMATIONS; SPONTANEOUS-ABORTION; PARENTAL OCCUPATION; ETIOLOGIC HETEROGENEITY; SPINA-BIFIDA; FETAL-DEATH; PREGNANCY AB Aims: To evaluate the association between parental occupational exposure to agricultural work and the risk of anencephaly in three Mexican states. Methods: A paired case control study ( 1: 1) was done based on records of the Epidemiological Surveillance System of Neural Tube Defects in Mexico; 151 cases of anencephaly of more than 20 weeks' gestation were selected between March 2000 and February 2001. Controls were selected from the same maternity services as those of the cases and were born alive without congenital malformations. Information was obtained from both parents by means of a general questionnaire, a food frequency questionnaire, and a specific questionnaire on occupational exposure to pesticides. Exposures were analysed with emphasis on the three months before and one month after the last menstruation periods ( acute risk period ( ARP)), as well as exposure prior to the abovementioned period ( non-acute risk period ( NARP)). Results: The children of mothers who worked in agriculture in the ARP had a greater risk of anencephaly ( OR = 4.57, 95% CI 1.05 to 19.96). The risk of fathers having a child with anencephaly was greater in those who applied pesticides irrespective of whether it was done in the ARP or the NARP ( OR = 2.50, 95% CI 0.73 to 8.64; and OR= 2.03, 95% CI 0.58 to 7.08, respectively). Conclusions: These results support the hypothesis of the effect of maternal exposure to agricultural work on anencephaly and suggest that exposure of the father to pesticides in the periconceptional period or prior to this can also increase the risk of having an anencephalic child. C1 Natl Inst Publ Hlth, Ctr Hlth & Populat Res, Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico. Mexican Inst Social Secur, Mexico City, DF, Mexico. Andalusian Sch Publ Hlth, Granada, Spain. Miguel Hernandez Univ, Dept Publ Hlth, Alicante, Spain. Univ Valencia, Dept Prevent Med & Publ Hlth, Valencia, Spain. RP Lacasana, M, Natl Inst Publ Hlth, Ctr Hlth & Populat Res, Col Sta Maria Ahuacatitlan, Av Univ 655, Cuernavaca 62508, Morelos, Mexico. EM mlacasan@correo.insp.mx NR 43 TC 3 PU B M J PUBLISHING GROUP PI LONDON PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND SN 1351-0711 J9 OCCUP ENVIRON MEDICINE JI Occup. Environ. Med. PD OCT PY 2006 VL 63 IS 10 BP 649 EP 656 DI 10.1136/oem.2005.023333 PG 8 SC Public, Environmental & Occupational Health GA 084TH UT ISI:000240556800002 ER PT S AU Courtin, R Luz, D Gautier, D Appourchaux, T Lebreton, JP Ferri, F Lara, L Hourdin, F Kaufer, A AF Courtin, Regis Luz, David Gautier, Daniel Appourchaux, Thierry Lebreton, Jean-Pierre Ferri, Francesca Lara, Luisa Hourdin, Frederic Kaufer, Andreas TI Characterization of the zonal wind flow in the upper atmosphere of Titan with the VLT SO HIGHLIGHTS OF ASTRONOMY, VOL 13 SE IAU SYMPOSIA LA English DT Article AB We report on recent efforts to characterize the zonal wind flow in the upper atmosphere of Titan from high resolution spectroscopic observations with the Very Large Telescope. C1 Observ Paris, CNRS, LESIA, F-92195 Meudon, France. European Space Agcy, Estec, NL-2200 AG Noordwijk, Netherlands. Univ Padua, Padua, Italy. Inst Astrofis Andalucia, Granada, Spain. Meteorol Dynam Lab, Paris, France. European So Observ, Santiago 19, Chile. RP Courtin, R, Observ Paris, CNRS, LESIA, F-92195 Meudon, France. NR 3 TC 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA SN 0074-1809 J9 IAU SYMP PY 2005 VL 13 BP 897 EP 897 PG 1 SC Astronomy & Astrophysics GA BFB49 UT ISI:000240768700252 ER PT J AU Martinez-Espin, E Martinez-Gonzalez, LJ Fernandez-Rosado, F Entrala, C Alvarez, JC Lorente, JA Budowle, B de Monroy, MO AF Martinez-Espin, Esther Martinez-Gonzalez, Luis J. Fernandez-Rosado, Francisco Entrala, Carmen Alvarez, J. Carlos Lorente, Jose A. Budowle, Bruce de Monroy, Myriam Ovalle TI Guatemala mestizo population data on 15 STR loci (Identifiler (R) kit) SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE forensic science; DNA typing; population genetics; Guatemala; identifiler((R)) kit; D3S1358; TH01; D21S11; D18S51; D2S1338; D5S818; D13S317; D7S820; D16S539; CSF1PO; D19S433; vWA; D8S1179; TPOX; FGA ID GENETIC-VARIATION C1 Univ Granada, Fac Med, Dept Legal Med, Lab Genet Identificat, Granada 18012, Spain. Ciencias Salud BIC, PT, R&D Div, LORGEN GP, Granada 18100, Spain. Fed Bur Invest Acad, Lab Div, Quantico, VA 22135 USA. Minist Publ Guatemala, Dept Tecn Cient, Guatemala City, Guatemala. RP Lorente, JA, Univ Granada, Fac Med, Dept Legal Med, Lab Genet Identificat, Granada 18012, Spain. EM jlorente@ugr.es NR 5 TC 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD SEP PY 2006 VL 51 IS 5 BP 1216 EP 1218 DI 10.1111/j.1556-4029.2006.00249.x PG 3 SC Medicine, Legal GA 087WO UT ISI:000240773700047 ER PT J AU Florez, O Zafra, G Morillo, C Martin, J Gonzalez, CI AF Florez, Oscar Zafra, German Morillo, Carlos Martin, Javier Gonzalez, Clara Isabel TI Interleukin-1 gene cluster polymorphism in Chagas disease in a Colombian case-control study SO HUMAN IMMUNOLOGY LA English DT Article DE Chagas disease; interleukin 1; interleukin 1 receptor; interleukin 1 antagonist; polymorphism ID TRYPANOSOMA-CRUZI ANTIGENS; RECEPTOR ANTAGONIST GENE; NECROSIS-FACTOR-ALPHA; LINKAGE DISEQUILIBRIUM; PARASITE PERSISTENCE; PLASMA-LEVELS; CARDIOMYOPATHY; ASSOCIATION; MYOCARDITIS; SUSCEPTIBILITY AB The aim of this study was to assess the possible association between the ILIA, IL1B and IL1RN gene polymorphisms and Chagas disease. Our study population consisted of 130 serologically positive cardiomyopathic patients and 130 seropositive and asymptomatic individuals from a Colombian population where Trypanosoma cruzi infection is endemic. Genotyping of the ILIA (-889C/T, +4845G/T), IL1B (-511C/T, -31T/C, +3954T/C, +5810G/A) and IL1RN (+8006T/C, +8061C/T, + 1100T/C) polymorphisms was performed by polymerase chain reaction-restriction fragment length polymorphism and polymerase chain reaction sequence-specific primer methods. Statistically significant differences in the distribution of the IL1B +5810 genotypes were observed comparing cardiomyopathic patients and asymptomatic individuals (p = 0.036). Frequency of the GG genotype was higher in the cardiomyopathic patient group than in the asymptomatic group (13% versus 5%, P = 0.03, odds ratio [OR] = 2.64, 95,76 confidence interval [CI] = 0.99-7-33). Differences in the distribution of the allele frequencies were also observed, being the +5810G allele overrepresented in patients with cardiomyopathy (37% versus 27%, p = 0.014, OR = 1.59, 95% Cl = 1.08-2.36). Examination of markers in the ILIA (-889 and +4845), IL1B (-511, -31, and +3954) and IL1RN (+11100) genes revealed that the overall distribution of alleles and genotypes in patients with chagasic cardiomyopathy and asymptomatic were not significantly different. Our results show that in,Colombian population the IL1B+5810G allele was associated with an increased risk chagasic cardiomyopathy. In addition, we demonstrated that homozygosity for the IL1B+5810G risk allele increased significantly the susceptibility to cardiomyopathy. This implies that the effect of IL1B gene on chagasic cardiomyopathy predisposition is dose dependent. We found that the haplotype CT of IL1B -31 and +3954 polymorphisms showed higher association with risk to chagasic cardiomyopathy (p(c) = 0.008, OR = 12.53) and the extended haplotype (CCT-CATT) was significantly more frequent in asymptomatic than in cardiomyopathic patients (p = 0.0014, P-c = 0.011, OR = 0.17). Therefore this study suggests that IL1 gene cluster polymorphisms may play a relevant role in the susceptibility to development of chagasic chronic cardiomyopathy. (c) American Society for Histocompatibitity and Immunogenetics, 2006. Published by Elsevier Inc. C1 Univ Ind Santander, Escuela Bacteriol, Fac Salud, Immunol & Mol Epidemiol Unit,Hlth Fac, Bucaramanga 678, Santander, Colombia. Fdn Cardiovasc Colombia, Autonomous Nervous Syst Unit, Floridablanca, Colombia. Inst Parasitol & Biomed, Granada, Spain. RP Gonzalez, CI, Univ Ind Santander, Escuela Bacteriol, Fac Salud, Immunol & Mol Epidemiol Unit,Hlth Fac, Carrera 32 29-31, Bucaramanga 678, Santander, Colombia. EM cig@uis.edu.co NR 54 TC 5 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0198-8859 J9 HUM IMMUNOL JI Hum. Immunol. PD SEP PY 2006 VL 67 IS 9 BP 741 EP 748 DI 10.1016/j.humimm.2006.06.004 PG 8 SC Immunology GA 093KW UT ISI:000241168200010 ER PT J AU Orozco, G Robledo, G Reddy, MVPL Garcia, A Pascual-Salcedo, D Balsa, A Gonzalez-Gay, MA Eimon, A Paira, S Scherbarth, HR Pons-Estel, BA Petersson, IF Alarcon-Riquelme, M Martin, J AF Orozco, G. Robledo, G. Reddy, M. V. P. Linga Garcia, A. Pascual-Salcedo, D. Balsa, A. Gonzalez-Gay, M. A. Eimon, A. Paira, S. Scherbarth, H. R. Pons-Estel, B. A. Petersson, I. F. Alarcon-Riquelme, M. Martin, J. TI Study of the role of a functional polymorphism of MHC2TA in rheumatoid arthritis in three ethnically different populations SO RHEUMATOLOGY LA English DT Letter ID II TRANSACTIVATOR GENE; MULTIPLE-SCLEROSIS; SUSCEPTIBILITY; EXPRESSION C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Parque Tecnol Ciencias Salud, Granada 18100, Spain. Uppsala Univ, Rudbeck Lab, Dept Genet & Pathol, Uppsala, Sweden. Hosp Virgen Nieves, Serv Reumatol, Granada, Spain. Hosp La Paz, Serv Reumatol & Immunol, Madrid, Spain. Hosp Xeral Calde, Serv Reumatol, Lugo, Spain. CEMIC, Buenos Aires, DF, Argentina. Hosp Jose M Cullen, Santa Fe, Argentina. Hosp Interzonal Gen Agudos, Serv Reumatol, Mar Del Plata, Argentina. Sanatorio Parque, Rosario, Argentina. Spenshult Hosp Rheumat Dis, Halmstad, Sweden. RP Martin, J, CSIC, Inst Parasitol & Biomed Lopez Neyra, Parque Tecnol Ciencias Salud, Avenida Conocimiento S-N, Granada 18100, Spain. EM martin@ipb.csic.es NR 10 TC 5 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1462-0324 J9 RHEUMATOLOGY JI RHEUMATOLOGY PD NOV PY 2006 VL 45 IS 11 BP 1442 EP 1444 DI 10.1093/rheumatology/kel272 PG 3 SC Rheumatology GA 097EZ UT ISI:000241431000022 ER PT J AU Gomez, LM Anaya, JM Sierra-Filardi, E Cadena, J Corbi, A Martin, J AF Gomez, Luis M. Anaya, Juan-Manuel Sierra-Filardi, Elena Cadena, Jose Corbi, Angel Martin, Javier TI Analysis of DC-SIGN (CD209) functional variants in patients with tuberculosis SO HUMAN IMMUNOLOGY LA English DT Article DE DC-SIGN; CD209; tuberculosis; tuberculin skin test; Colombia ID GENETIC POLYMORPHISMS; DENDRITIC CELLS; ASSOCIATION; NONINTEGRIN; PROMOTER; RECEPTOR; BINDING; VIRUS; RISK AB Several lines of evidence suggest that host genetic factors controlling the immune response influence infection by Mycobacterium tuberculosis. Recently, DC-SIGN has been shown to be the major M, tuberculosis receptor on dendritic cells (DCs). The aim of this study was to investigate the influence of DC-SIGN functional polymorphisms -336G/A SNP in the promoter region and insertion/deletion in the "neck" region on the predisposition to tuberculosis. We performed an association study in 110 HIV-negative tuberculosis patients and 299 matched controls. In addition, a total of 155 healthy controls were screened for the tuberculin skin test (TST). DC-SIGN -336 SNP detection was performed by the real-time polymerase chain reaction technology, using the TaqMan 5' allele. The insertion/deletion in the "neck" region was analyzed by polymerase chain reaction with specific primers. Although an increased frequency of the G allele in tuberculosis patients (23176), as compared with controls (19%), was observed, differences were not statistically significant (OR = 1.31, 95176 CI = 0.89-1.94, P = 0.14). On the other hand, DC-SIGN repeat polymorphism in the "neck" region had a very low frequency in the analyzed population. We conclude that the studied polymorphisms are not relevant risk factors for developing tuberculosis in Northwestern Colombian individuals. Human Immunology 67, 808-811 (2006). (c) American Society for Histocompatibility and 1mmunogenetics, 2006. Published by Elsevier Inc. C1 Inst Parasitol & Biomed Lopez Neyra, CSIC, Armilla 18100, Granada, Spain. Univ Nacl Rosario, Cellular Biol & Immunogenet Unit, Corp Investigac Biol, Medellin, Colombia. CSIC, Ctr Invest Biol, Madrid, Spain. RP Martin, J, Inst Parasitol & Biomed Lopez Neyra, CSIC, Ave Conocimiento S-N,Parque Tecnol Ciencias Salud, Armilla 18100, Granada, Spain. EM martin@ipb.csic.es NR 16 TC 5 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0198-8859 J9 HUM IMMUNOL JI Hum. Immunol. PD OCT PY 2006 VL 67 IS 10 BP 808 EP 811 DI 10.1016/j.humimm.2006.07.003 PG 4 SC Immunology GA 101OY UT ISI:000241751300005 ER PT J AU Binette, L Wilman, RJ Villar-Martin, M Fosbury, RAE Jarvis, MJ Rottgering, HJA AF Binette, L. Wilman, R. J. Villar-Martin, M. Fosbury, R. A. E. Jarvis, M. J. Rottgering, H. J. A. TI Ionization of large-scale absorbing haloes and feedback events from high-redshift radio galaxies SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE cosmology : early universe; galaxies : active; galaxies : formation; galaxies : ISM; line : formation ID LYMAN-ALPHA EMISSION; STAR-FORMATION; INTERGALACTIC MEDIUM; ABSORPTION-LINES; HII GALAXY; KINEMATICS; QUASARS; CLUSTER; SPECTROSCOPY; POPULATIONS AB Aims. We present photoionization calculations for the spatially-extended absorbers observed in front of the extended emission-line spectrum of two high-redshift radio galaxies, 0943 - 242 (z(e) = 2.922) and 0200 + 015 (z(e) = 2.230), with the aim of reproducing the absorber column ratio, N-CIV/N-HI. Methods. We explore the effects of using different UV continua in the photoionization calculations. A comparison is made between the absorber in 0200 + 015 and the two absorbers observed near the lensed Lynx arc nebula at redshift 3.36, which present very similar NCIV/NHI ratios. Results. We find that hot stars from a powerful starburst, or a metagalactic background radiation (MBR) in which stars dominate quasars, are equally successful in reproducing the observed NCIV/NHI, assuming subsolar gas metallicities for each absorber. These softer SEDs eliminate the difference of a factor 1000 in metallicity between the two absorbers encountered in earlier work where a power-law sed was assumed. The detection of continuum flux in 0943 - 242 suggests that the level of ionizing photons is consistent with a stellar ionizing source. Conclusions. If the MBR is responsible for the ionization of the radio galaxy absorbing shells, their radii (if spherical) would be large (> 100 kpc) and their mass huge > 10(12) M circle dot, implying that the feedback mechanism initiated by the central galaxy has caused the expulsion of more baryonic mass than that left in the radio galaxy. If, as we believe is more likely, stellar ionizing sources within the radio galaxy are responsible for the absorber's ionization, smaller radii of similar to 25 kpc and much smaller masses (similar to 10(8) - 10(10) M circle dot) are inferred. This radius is consistent with the observed transition in radio source size between the smaller sources in which strong Hi absorption is almost ubiquitous and the larger sources where it is mostly lacking. Finally, we outline further absorption-line diagnostics that could be used to further constrain the properties of the haloes and their source of ionization. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Durham, Dept Phys, Durham DH1 3LE, England. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. ST ECF, D-85748 Garching, Germany. Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England. Leiden Observ, NL-2300 RA Leiden, Netherlands. RP Binette, L, Univ Nacl Autonoma Mexico, Inst Astron, Ap 70-264, Mexico City 04510, DF, Mexico. EM r.j.wilman@durham.ac.uk NR 45 TC 3 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 2006 VL 459 IS 1 BP 31 EP 42 DI 10.1051/0004-6361:20065079 PG 12 SC Astronomy & Astrophysics GA 102CT UT ISI:000241789100009 ER PT J AU Sicardy, B Colas, F Widemann, T Bellucci, A Beisker, W Kretlow, M Ferri, F Lacour, S Lecacheux, J Lellouch, E Pau, S Renner, S Roques, F Fienga, A Etienne, C Martinez, C Glass, IS Baba, D Nagayama, T Nagata, T Itting-Enke, S Bath, KL Bode, HJ Bode, F Ludemann, H Ludemann, J Neubauer, D Tegtmeier, A Tegtmeier, C Thome, B Hund, F deWitt, C Fraser, B Jansen, A Jones, T Schoenau, P Turk, C Meintjies, P Hernandez, M Fiel, D Frappa, E Peyrot, A Teng, JP Vignand, M Hesler, G Payet, T Howell, RR Kidger, M Ortiz, JL Naranjo, O Rosenzweig, P Rapaport, M AF Sicardy, B. Colas, F. Widemann, T. Bellucci, A. Beisker, W. Kretlow, M. Ferri, F. Lacour, S. Lecacheux, J. Lellouch, E. Pau, S. Renner, S. Roques, F. Fienga, A. Etienne, C. Martinez, C. Glass, I. S. Baba, D. Nagayama, T. Nagata, T. Itting-Enke, S. Bath, K. -L. Bode, H. -J. Bode, F. Luedemann, H. Luedemann, J. Neubauer, D. Tegtmeier, A. Tegtmeier, C. Thome, B. Hund, F. deWitt, C. Fraser, B. Jansen, A. Jones, T. Schoenau, P. Turk, C. Meintjies, P. Hernandez, M. Fiel, D. Frappa, E. Peyrot, A. Teng, J. P. Vignand, M. Hesler, G. Payet, T. Howell, R. R. Kidger, M. Ortiz, J. L. Naranjo, O. Rosenzweig, P. Rapaport, M. TI The two Titan stellar occultations of 14 November 2003 SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID UPPER-ATMOSPHERE; ZONAL WINDS; STRATOSPHERE; NEPTUNE; TEMPERATURE AB [1] We report the observation of two stellar occultations by Titan on 14 November 2003, using stations in the Indian Ocean, southern Africa, Spain, and northern and southern Americas. These occultations probed altitudes between similar to 550 and 250 km ( similar to 1 to 250 mbar) in Titan's upper stratosphere. The light curves reveal a sharp inversion layer near 515 +/- 6 km altitude (1.5 mu bar pressure level), where the temperature increases by 15 K in only 6 km. This layer is close to an inversion layer observed fourteen months later by the Huygens HASI instrument during the entry of the probe in Titan's atmosphere on 14 January 2005 [ Fulchignoni et al., 2005]. Central flashes observed during the first occultation provide constraints on the zonal wind regime at 250 km, with a strong northern jet ( similar to 200 m s(-1)) around the latitude 55 degrees N, wind velocities of similar to 150 m s(-1) near the equator, and progressively weaker winds as more southern latitudes are probed. The haze distribution around Titan's limb at 250 km altitude is close to that predicted by the Global Circulation Model of Rannou et al. ( 2004) in the southern hemisphere, but a clearing north of 40 degrees N is necessary to explain our data. This contrasts with Rannou et al.' s ( 2004) model, which predicts a very thick polar hood over Titan's northern polar regions. Simultaneous observations of the flashes at various wavelengths provide a dependence of tau proportional to lambda(-q), with q = 1.8 +/- 0.5 between 0.51 and 2.2 mu m for the tangential optical depth of the hazes at 250 km altitude. C1 Observ Paris, LESIA, F-92195 Meudon, France. Observ Paris, IMCCE, F-75014 Paris, France. Int Occultat Timing Assoc, European Sect, Hannover, Germany. Univ Padua, CISAS G Colombo, I-35131 Padua, Italy. Observ Paris, CERCOM, F-92195 Meudon, France. Inst Super Ciencias Astron, Buenos Aires, DF, Argentina. Liga Iberoamer Astron, Buenos Aires, DF, Argentina. S African Astron Observ, ZA-7935 Cape Town, South Africa. Nagoya Univ, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan. Hakos Guestfarm, Windhoek, Namibia. Astron Soc So Africa, ZA-7935 Cape Town, South Africa. Univ Orange Free State, Boyden Observ, ZA-9300 Bloemfontein, South Africa. Care Of Colas F, Assoc Aude, F-75014 Paris, France. Lycee Stanislas, F-75006 Paris, France. Astronef, Planetarium St Etienne, F-42100 St Etienne, France. Observ Makes, La Riviere, Reunion. ARECA, St Marie, Reunion. Wyoming Infrared Observ, Dept Phys & Astron, Laramie, WY 82070 USA. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Los Andes, Fac Ciencias, Dept Fis, Grp Astrofis Teor, Merida 5101, Venezuela. Observ Aquitain Sci Univ, F-33270 Floirac, France. RP Sicardy, B, Observ Paris, LESIA, Batiment 10, F-92195 Meudon, France. EM bruno.sicardy@obspm.fr NR 21 TC 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-PLANETS JI J. Geophys. Res.-Planets PD NOV 18 PY 2006 VL 111 IS E11 AR E11S91 DI 10.1029/2005JE002624 PG 26 SC Geochemistry & Geophysics GA 107NG UT ISI:000242177700001 ER PT J AU Raiteri, CM Villata, M Kadler, M Ibrahimov, MA Kurtanidze, OM Larionov, VM Tornikoski, M Boltwood, P Lee, CU Aller, MF Romero, GE Aller, HD Araudo, AT Arkharov, AA Bach, U Barnaby, D Berdyugin, A Buemi, CS Carini, MT Carosati, D Cellone, SA Cool, R Dolci, M Efimova, NV Fuhrmann, L Hagen-Thorn, VA Holcomb, M Ilyin, I Impellizzeri, V Ivanidze, RZ Kapanadze, BZ Kerp, J Konstantinova, TS Kovalev, YY Kovalev, YA Kraus, A Krichbaum, TP Lahteenmaki, A Lanteri, L Leto, P Lindfors, E Mattox, JR Napoleone, N Nikolashvili, MG Nilsson, K Ohlert, J Papadakis, IE Pasanen, M Poteet, C Pursimo, T Ros, E Sigua, LA Smith, S Takalo, LO Trigilio, C Troller, M Umana, G Ungerechts, H Walters, R Witzel, A Xilouris, E AF Raiteri, C. M. Villata, M. Kadler, M. Ibrahimov, M. A. Kurtanidze, O. M. Larionov, V. M. Tornikoski, M. Boltwood, P. Lee, C. -U. Aller, M. F. Romero, G. E. Aller, H. D. Araudo, A. T. Arkharov, A. A. Bach, U. Barnaby, D. Berdyugin, A. Buemi, C. S. Carini, M. T. Carosati, D. Cellone, S. A. Cool, R. Dolci, M. Efimova, N. V. Fuhrmann, L. Hagen-Thorn, V. A. Holcomb, M. Ilyin, I. Impellizzeri, V. Ivanidze, R. Z. Kapanadze, B. Z. Kerp, J. Konstantinova, T. S. Kovalev, Y. Y. Kovalev, Yu. A. Kraus, A. Krichbaum, T. P. Lahteenmaki, A. Lanteri, L. Leto, P. Lindfors, E. Mattox, J. R. Napoleone, N. Nikolashvili, M. G. Nilsson, K. Ohlert, J. Papadakis, I. E. Pasanen, M. Poteet, C. Pursimo, T. Ros, E. Sigua, L. A. Smith, S. Takalo, L. O. Trigilio, C. Troller, M. Umana, G. Ungerechts, H. Walters, R. Witzel, A. Xilouris, E. TI Multifrequency variability of the blazar AO 0235+164 - The WEBT campaign in 2004-2005 and long-term SED analysis SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : active; galaxies : BL Lacertae objects : general; galaxies : BL Lacertae objects : individual : AO 0235+164; galaxies : jets; galaxies : quasars : general ID ACTIVE GALACTIC NUCLEI; BL-LACERTAE OBJECTS; EXTRAGALACTIC RADIO-SOURCES; XMM-NEWTON OBSERVATIONS; SOFT-X-RAY; RELATIVISTIC JETS; LIGHT CURVES; HELICAL JETS; QUASARS; AO-0235+164 AB Aims. A huge multiwavelength campaign targeting the blazar AO0235+164 was organized by the Whole Earth Blazar Telescope (WEBT) in 2003 - 2005 to study the variability properties of the source. Methods. Monitoring observations were carried out at cm and mm wavelengths, and in the near-IR and optical bands, while three pointings by the XMM-Newton satellite provided information on the X-ray and UV emission. Results. We present the data acquired during the second observing season, 2004 - 2005, by 27 radio-to-optical telescopes. The similar to 2600 data points collected allow us to trace the low-energy behaviour of the source in detail, revealing an increased near-IR and optical activity with respect to the previous season. Increased variability is also found at the higher radio frequencies, down to similar to 15 GHz, but not at the lower ones. While the X-ray (and optical) light curves obtained during the XMM-Newton pointings reveal no significant short-term variability, the simultaneous intraday radio observations with the 100 m telescope at Effelsberg show flux-density changes at 10.5 GHz, which are more likely due to a combination of intrinsic and extrinsic processes. Conclusions. The radio ( and optical) outburst predicted to peak around February - March 2004 on the basis of the previously observed 5 - 6 yr quasi-periodicity did not occur. The analysis of the optical light curves reveals now a longer characteristic time scale of variability of similar to 8 yr, which is also present in the radio data. The spectral energy distributions corresponding to the XMM-Newton observations performed during the WEBT campaign are compared with those pertaining to previous pointings of X-ray satellites. Bright, soft X-ray spectra can be described in terms of an extra component, which appears also when the source is faint through a hard UV spectrum and a curvature of the X-ray spectrum. Finally, there might be a correlation between the X-ray and optical bright states with a long time delay of about 5 yr, which would require a geometrical interpretation. C1 Osserv Astron Torino, INAF, I-10025 Pino Torinese, Italy. Max Planck Inst Radioastron, D-53121 Bonn, Germany. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Uzbek Acad Sci, Ulugh Beg Astron Inst, Tashkent 700052, Uzbekistan. Abastumani Observ, GE-383762 Abastumani, Rep of Georgia. St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russia. Helsinki Univ Technol, Metsahovi Radio Observ, FIN-02540 Kylmala, Finland. Korea Astron & Space Sci Inst, Seoul, South Korea. Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA. Inst Argentino Radioastron, RA-1894 Villa Elisa, Argentina. UNLP, Fac Ciencias Astron & Geofis, La Plata, Buenos Aires, Argentina. Pulkovo Observ, St Petersburg, Russia. Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY USA. Tourla Observ, Piikkio 21500, Finland. Osserv Astrofis Catania, INAF, I-95123 Catania, Italy. Armenzano Astron Observ, Assisi, Italy. Steward Observ, Tucson, AZ 85721 USA. Osservatorio Astron Collurania, INAF, I-64100 Teramo, Italy. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Univ Perugia, Osservatorio Astron, I-06100 Perugia, Italy. AStrophys Inst Potsdam, D-14482 Potsdam, Germany. Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany. Natl Radio Astron Observ, Green Bank, WV 24944 USA. Astro Space Ctr Lebedev Phys Inst, Moscow 117997, Russia. Ist Radioastron, INAF, I-96017 Noto, Italy. Fayetteville State Univ, Dept Nat Sci, Fayetteville, NC 28301 USA. Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy. Michael Adrian Observ, D-65468 Trebur, Germany. FORTH, IESL, GR-71110 Iraklion, Greece. Univ Crete, Dept Phys, GR-71003 Iraklion, Greece. Nord Opt Telescope, Santa Cruz de La Palma 38700, Spain. Tbilisi State Univ, Akhaltsikhe Branch, GE-380086 Tbilisi, Rep of Georgia. IRAM, E-18012 Granada, Spain. Natl Observ Athens, Inst Astron & Astrophys, GR-11810 Athens, Greece. RP Raiteri, CM, Osserv Astron Torino, INAF, I-10025 Pino Torinese, Italy. EM villata@to.astro.it NR 50 TC 17 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2006 VL 459 IS 3 BP 731 EP 743 DI 10.1051/0004-6361:20065744 PG 13 SC Astronomy & Astrophysics GA 108YW UT ISI:000242276100006 ER PT J AU Paunzen, E Maitzen, HM Pintado, OI Claret, A Iliev, IK Netopil, M AF Paunzen, E. Maitzen, H. M. Pintado, O. I. Claret, A. Iliev, I. Kh. Netopil, M. TI Chemically peculiar stars in the large magellanic cloud SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : chemically peculiar; stars : early-type; techniques : photometric; galaxies : Magellanic Clouds ID DELTA-A-PHOTOMETRY; LAMBDA-BOOTIS STARS; ABSOLUTE MAGNITUDES; LMC; METALLICITY; EVOLUTION; CLUSTERS AB Context. The detection of magnetic chemically peculiar (CP2) stars in open clusters of extragalactic systems can give observational answers to many unsolved questions. For example, one can study the influence of different global as well local environments on the lack of and presence of peculiarities. Aims. The mean percentage of CP2 stars in the Milky Way is of the order of 5% for the spectral range from early B-to F-type, luminosity class V objects. The origin of the CP2 phenomenon seems to be closely connected to the overall metallicity and global magnetic field environment. The theoretical models are still only tested by observations in the Milky Way. It is therefore essential to provide high quality observations in rather different global environments. Methods. The young clusters NGC 2136/7 were observed in the. a photometric system. This intermediate band photometric system samples the depth of the 520 nm flux depression by comparing the flux at the center with the adjacent regions with bandwidths of 11 nm to 23 nm. The Delta a photometric system is most suitable for detecting CP2 stars with high efficiency, but is also capable of detecting a small percentage of non-magnetic CP objects. Furthermore, the groups of (metal-weak) lambda Bootis, as well as classical Be/shell stars, can be successfully investigated. Results. We present high precision photometric. a observations of 417 objects in NGC 2136/7 and its surrounding field, of which five turned out to be bona fide magnetic CP stars. In addition, we discovered two Be/Ae stars. Conclusions. From our investigations of NGC 1711, NGC 1866, NGC 2136/7, their surroundings, and one independent field of the LMC population, we derive an occurrence of classical chemically peculiar stars of 2.2(6)% in the LMC, which is only half the value found in the Milky Way. The mass and age distribution of the photometrically detected CP stars is not different from that of similar objects in galactic open clusters. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Univ Nacl Tucuman, Fac Ciencias Exactas & Tecnol, Dept Fis, Consejo Nacl Invest Cient & Tecn, RA-4000 San Miguel De Tucuman, Tucuman, Argentina. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Astron Observ, Astron Inst, Smoljan 4700, Bulgaria. RP Paunzen, E, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM Ernst.Paunzen@univie.ac.at NR 22 TC 4 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2006 VL 459 IS 3 BP 871 EP 874 DI 10.1051/0004-6361:20065333 PG 4 SC Astronomy & Astrophysics GA 108YW UT ISI:000242276100021 ER PT J AU Gonzalez-Martin, O Masegosa, J Marquez, I Guerrero, MA Dultzin-Hacyan, D AF Gonzalez-Martin, O. Masegosa, J. Marquez, I. Guerrero, M. A. Dultzin-Hacyan, D. TI X-ray nature of the LINER nuclear sources SO ASTRONOMY & ASTROPHYSICS LA English DT Review DE galaxies : nuclei; X-rays : galaxies; galaxies : active ID ACTIVE GALACTIC NUCLEI; ULTRALUMINOUS INFRARED GALAXIES; XMM-NEWTON OBSERVATIONS; SUPERMASSIVE BLACK-HOLES; HUBBLE-SPACE-TELESCOPE; NEARBY SEYFERT-GALAXIES; CHANDRA OBSERVATIONS; ELLIPTIC GALAXY; LUMINOSITY FUNCTION; RADIO-SOURCES AB We report the results from a homogeneous analysis of the X-ray (Chandra ACIS) data available for a sample of 51 LINER galaxies selected from the catalogue by Carrillo et al. (1999, Rev. Mex. Astron. Astrofis., 35, 187) and representative of the population of bright LINER sources. The nuclear X-ray morphology has been classified by their nuclear compactness in the hard band (4.5 - 8.0 keV) into 2 categories: active galactic nuclei (AGN) candidates ( with a clearly identified unresolved nuclear source) and starburst (SB) candidates ( without a clear nuclear source). Sixty percent of the total sample are classified as AGNs, with a median luminosity of L-X(2-10 keV) = 2.5 x 10(40) erg s(-1), which is an order of magnitude higher than for SB-like nuclei. The spectral fitting allows us to conclude that most of the objects need a non-negligible power-law contribution. When no spectral fitting can be performed ( data with a low signal-to-noise ratio), the color - color diagrams allow us to roughly estimate physical parameters, such as column density, temperature of the thermal model, or spectral index for a power-law, and therefore to better constrain the origin of the X-ray emission. The X-ray morphology, the spectra, and the color - color diagrams together allow us to conclude that a high percentage of LINER galaxies, at least approximate to 60%, could host AGN nuclei, although contributions from high-mass X-ray binaries or ultra-luminous X-ray sources cannot be ruled out for some galaxies. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Gonzalez-Martin, O, CSIC, Inst Astrofis Andalucia, Apartado Postal 3004, E-18080 Granada, Spain. EM omaira@iaa.es NR 170 TC 11 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2006 VL 460 IS 1 BP 45 EP U93 DI 10.1051/0004-6361:20054756 PG 79 SC Astronomy & Astrophysics GA 108ZD UT ISI:000242276800006 ER PT J AU Souchie, EL Azcon, R Barea, JM Saggin-Junior, OJ da Silva, EMR AF Souchie, Edson Luiz Azcon, Rosario Barea, Jose Miguel Saggin-Junior, Orivaldo Jose Ribeiro da Silva, Eliane Maria TI Phosphate solubilization and synergism between P-solubilizing and arbuscular mycorrhizal fungi SO PESQUISA AGROPECUARIA BRASILEIRA LA English DT Article DE Aspergillus; Trifolium pratense; Araxa apatite; aluminum phosphate; symbiosis; Glomus ID ROCK-PHOSPHATE; ASPERGILLUS-NIGER; ECTOMYCORRHIZAL FUNGI; ALUMINUM RESISTANCE; PHOSPHORUS UPTAKE; PLANT-GROWTH; OXALIC-ACID; RHIZOSPHERE; STRAINS; IMPROVE AB The objective of this work was to evaluate the ability of several P-solubilizing fungi to solubilize aluminum phosphate and Araxa apatite as well as the synergism between the P-solubilizing fungus, PSF 7, and arbuscular mycorrhizal fungi to promote clover growth amended with aluminum phosphate. Two experiments were carried out, the first under laboratory conditions and the second in a controlled environmental chamber. In the first experiment, PSF 7, PSF 9, PSF 21 and PSF 22 isolates plus control were incubated in liquid medium at 28 degrees C for eight days. On the 2nd, 4th and 8th day of incubation, pH and soluble P were determined. In the second experiment, clover was sowed in plastic pots containing 300 g of sterilized substrate amended with aluminum phosphate, 3 g L-1, in presence and absence of PSF 7 isolate and arbuscular mycorrhizal fungi. A completely randomized design, in factorial outline 2x2 (presence and absence of PSF 7 and arbuscular mycorrhizal fungi) and five replicates were used. In the first experiment, higher P content was detected in the medium containing aluminum phosphate. PSF 7 is the best fungi isolate which increases aluminum solubilization with major tolerance to Al3+. Clover growth was stimulated by presence of PSF 7 and arbuscular mycorrhizal fungi. There is synergism between microorganisms utilized to improve plant nutrition. C1 Ctr Fed Educ Tecnol, BR-75901970 Rio Verde, Go, Brazil. Estac Expt Zaidin, Dept Microbiol & Sistemas Simbiot, Granada 18008, Spain. Embrapa Agrobiol, BR-23851970 Seropedica, RJ, Brazil. RP Souchie, EL, Ctr Fed Educ Tecnol, Caixa Postal 66, BR-75901970 Rio Verde, Go, Brazil. EM esouchie@yahoo.com.br razcon@eez.csic.es jmbarea@eez.csic.es saggin@cnpab.embrapa.br eliane@cnpab.embrapa.br NR 29 TC 0 PU EMPRESA BRASIL PESQ AGROPEC PI BRASILIA PA EMBRAPA-SPI-PAB SAIN-PARQUE RURAL NORTE, CAIXA POSTAL 04 0315, 70770-901 BRASILIA, BRAZIL SN 0100-204X J9 PESQUISA AGR BRASIL JI Pesqui. Agropecu. Bras. PD SEP PY 2006 VL 41 IS 9 BP 1405 EP 1411 PG 7 SC Agriculture, Multidisciplinary GA 109BD UT ISI:000242282000009 ER PT J AU Amado, PJ Martin-Ruiz, S Suarez, JC Ferro, AA Moya, A Ribas, I Poretti, E AF Amado, Pedro J. Martin-Ruiz, Susana Suarez, Juan Carlos Ferro, Armando Arellano Moya, Andres Ribas, Ignasi Poretti, Ennio TI HD 172189, a cluster member binary system with a delta Scuti component in the field of view of COROT SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article DE stars : binaries; eclipsing; stars : oscillations; stars : variables : delta Sct; galaxy : open clusters; association : IC 4756 AB Photometric and spectroscopic results for the star HD 172189, member of the open cluster IC 4756 in the summer field of the space mission COROT, are presented. From photometric observations in the Stromgren system carried out at various epochs, its binary nature as well as the presence of a delta Scuti-type pulsating component have been discovered. The frequency analysis of the whole dataset confirms a dominant frequency of 19.5974 c d(-1) with a maximum amplitude near 0.02 mag plus other frequencies in the range 18-20 c d(-1). A preliminary orbital solution from the light curve and from four FEROS spectra reveals two similar components of around 1.5 M (circle dot) orbiting with a period of 5.702 d. C1 European So Observ, Santiago 19, Chile. CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. Observ Paris, LESIA, F-92195 Meudon, France. Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. Inst Estudis Espacials Catalunya, CSIC, Fac Ciencies, Bellaterra 08193, Spain. INAF, Osserv Astron Brera, I-23807 Merate, LC, Italy. RP Amado, PJ, European So Observ, Alonso Cordova 3107, Santiago 19, Chile. NR 4 TC 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PD AUG PY 2006 VL 304 IS 1-4 BP 173 EP 175 DI 10.1007/s10509-006-9102-3 PG 3 SC Astronomy & Astrophysics GA 109BX UT ISI:000242284000043 ER PT J AU Jakobsson, P Fynbo, JPU Ledoux, C Vreeswijk, P Kann, DA Hjorth, J Priddey, RS Tanvir, NR Reichart, D Gorosabel, J Klose, S Watson, D Sollerman, J Fruchter, AS Postigo, AD Wiersema, K Bjornsson, G Chapman, R Thone, CC Pedersen, K Jensen, BL AF Jakobsson, P. Fynbo, J. P. U. Ledoux, C. Vreeswijk, P. Kann, D. A. Hjorth, J. Priddey, R. S. Tanvir, N. R. Reichart, D. Gorosabel, J. Klose, S. Watson, D. Sollerman, J. Fruchter, A. S. de Ugarte Postigo, A. Wiersema, K. Bjoernsson, G. Chapman, R. Thoene, C. C. Pedersen, K. Jensen, B. L. TI HI column densities of z > 2 Swift gamma-ray bursts SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts; galaxies : high-redshift; galaxies : abundances; dust, extinction ID STAR-FORMATION; HOST GALAXIES; DUST; AFTERGLOW; REDSHIFT; CLOUDS; METALLICITY; ABSORPTION; SUPERNOVA; EMISSION AB Context. Before the launch of the Swift satellite, the majority of the gamma-ray burst (GRB) afterglows for which Lya was redshifted into the observable spectrum showed evidence for a damped Lya absorber. This small sample indicated that GRBs explode either in galaxies, or regions within them, having high neutral hydrogen column densities. Aims. To increase the spectroscopic sample of GRBs with z > 2 and hence establish the N(H I) distribution along GRB lines-of-sight. Methods. We have obtained six z > 2 GRB afterglow spectra and fitted the Lya absorption line in each case to determine N(H I). This has been complemented with 12 other Swift N(H I) values from the literature. Results. We show that the peak of the GRB N(H I) distribution is qualitatively consistent with a model where GRBs originate in Galactic-like molecular clouds. However, a systematic difference, in particular an excess of low column-density systems compared to the predictions, indicates that selection effects and conditions within the cloud (e.g. strong ionization) influence the observed N(H I) range. We also report the discovery of Lya emission from the GRB 060714 host, corresponding to a star-formation rate of approximately 0.8 M-circle dot yr(-1). Finally, we present accurate redshifts of the six bursts: z = 3.240 +/- 0.001 (GRB 050319), z = 2.198 +/- 0.002 (GRB 050922C), z = 3.221 +/- 0.001 (GRB 060526), z = 3.425 +/- 0.002 (GRB 060707), z = 2.711 +/- 0.001 (GRB 060714) and z = 3.686 +/- 0.002 (GRB 060906). C1 Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland. European So Observ, Santiago 19, Chile. Univ Chile, Dept Astron, Santiago, Chile. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. RP Jakobsson, P, Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England. NR 69 TC 26 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 2006 VL 460 IS 2 BP L13 EP L17 DI 10.1051/0004-6361:20066405 PG 5 SC Astronomy & Astrophysics GA 110HW UT ISI:000242370100004 ER PT J AU Watson, D Fynbo, JPU Ledoux, C Vreeswijk, P Hjorth, J Smette, A Andersen, AC Aoki, K Augusteijn, T Beardmore, AP Bersier, D Ceron, JMC D'Avanzo, P Diaz-Fraile, D Gorosabel, J Hirst, P Jakobsson, P Jensen, BL Kawai, N Kosugi, G Laursen, P Levan, A Masegosa, J Naranen, J Page, KL Pedersen, K Pozanenko, A Reeves, JN Rumyantsev, V Shahbaz, T Sharapov, D Sollerman, J Starling, RLC Tanvir, N Torstensson, K Wiersema, K AF Watson, D. Fynbo, J. P. U. Ledoux, C. Vreeswijk, P. Hjorth, J. Smette, A. Andersen, A. C. Aoki, K. Augusteijn, T. Beardmore, A. P. Bersier, D. Ceron, J. M. Castro D'Avanzo, P. Diaz-Fraile, D. Gorosabel, J. Hirst, P. Jakobsson, P. Jensen, B. L. Kawai, N. Kosugi, G. Laursen, P. Levan, A. Masegosa, J. Naranen, J. Page, K. L. Pedersen, K. Pozanenko, A. Reeves, J. N. Rumyantsev, V. Shahbaz, T. Sharapov, D. Sollerman, J. Starling, R. L. C. Tanvir, N. Torstensson, K. Wiersema, K. TI A log N-HI=22.6 damped Ly alpha absorber in a dark gamma-ray burst: The environment of GRB 050401 SO ASTROPHYSICAL JOURNAL LA English DT Article DE dust, extinction; galaxies : high-redshift; galaxies : ISM; gamma rays : bursts; quasars : absorption lines; X-rays : general ID HIGH COLUMN DENSITY; HOST GALAXIES; LYMAN-ALPHA; LOW METALLICITY; INTERSTELLAR-MEDIUM; ABSORPTION SYSTEMS; DUST PROPERTIES; STAR-FORMATION; LOW-REDSHIFT; NEUTRAL GAS AB The optical afterglow spectrum of GRB 050401 (at z = 2.8992 +/- 0.0004) shows the presence of a damped Ly alpha absorber (DLA), with log N-Hi 22.6 +/- 0.3. This is the highest column density ever observed in a DLA and is about 5 times larger than the strongest DLA detected so far in any QSO spectrum. From the optical spectrum, we also find a very large Zn column density, implying an abundance of [Zn/H] = -1.0 +/- 0.4. These large columns are supported by the early X-ray spectrum from Swift XRT, which shows a column density (in excess of Galactic) of log N-H = 22.21(-0.08)(+0.06) assuming solar abundances (at z = 2.9). The comparison of this X-ray column density, which is dominated by absorption due to alpha-chain elements, and the H I column density derived from the Ly alpha absorption line allows us to derive a metallicity for the absorbing matter of [alpha/H] = -0.4 +/- 0.3. The optical spectrum is reddened and can be well reproduced with a power law with SMC extinction, where A(V) = 0.62 +/- 0.06. But the total optical extinction can also be constrained independent of the shape of the extinction curve: from the optical to X-ray spectral energy distribution, we find 0.5 less than or similar to A(V) less than or similar to 4.5. However, even this upper limit, independent of the shape of the extinction curve, is still well below the dust column that is inferred from the X-ray column density, i.e., A(V) = 9.1(-1.5)(+1.4). This discrepancy might be explained by a small dust content with high metallicity (low dust-to-metals ratio). "Gray" extinction cannot explain the discrepancy, since we are comparing the metallicity to a measurement of the total extinction (without reference to the reddening). Little dust with high metallicity may be produced by sublimation of dust grains or may naturally exist in systems younger than a few hundred megayears. C1 Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark. European So Observ, Santiago 19, Chile. Natl Astron Observ, Subaru Telescope, Hilo, HI 96720 USA. Nord Opt Telescope, La Palma, Spain. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England. Osserv Astron Brera, INAF, I-23807 Merate, LC, Italy. Univ Insubria, Dipartimento Matemat & Fis, I-22100 Como, Italy. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Joint Astron Ctr, Hilo, HI 96720 USA. Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. ALMA Project Off, Natl Astron Observ, Mitaka, Tokyo 1818588, Japan. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. IKI, Inst Space Res, Moscow 117997, Russia. NASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771 USA. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain. Ulugh Beg Astron Inst, Tashkent 700052, Uzbekistan. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. RP Watson, D, Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark. EM darach@astro.ku.dk NR 66 TC 28 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 2006 VL 652 IS 2 PN Part 1 BP 1011 EP 1019 PG 9 SC Astronomy & Astrophysics GA 112MM UT ISI:000242530100015 ER PT J AU Rueda, B Reddy, MVPL Gonzalez-Gay, MA Balsa, A Pascual-Salcedo, D Petersson, IF Eimon, A Paira, S Scherbarth, HR Pons-Estel, BA Gonzalez-Escribano, MF Alarcon-Riquelme, ME Martin, J AF Rueda, Blanca Reddy, M. V. Prasad Linga Gonzalez-Gay, Miguel A. Balsa, Alejandro Pascual-Salcedo, Dora Petersson, Ingemar F. Eimon, Alicia Paira, Sergio Scherbarth, Hugo R. Pons-Estel, Bernardo A. Gonzalez-Escribano, Maria F. Alarcon-Riquelme, Marta E. Martin, Javier TI Analysis of IRF5 gene functional polymorphisms in rheumatoid arthritis SO ARTHRITIS AND RHEUMATISM LA English DT Article ID SYSTEMIC-LUPUS-ERYTHEMATOSUS; INTERFERON; AUTOIMMUNITY; EXPRESSION AB Objective. Recent findings suggest that interferon regulatory factor 5 (IRF-5) may play a crucial role in several cellular processes, including the transcription of genes for inflammatory cytokines. Two genetic variants of the IRF5 gene (rs2004640 in exon 1 and rs2280714 in the 3'-untranslated region) have been shown to exert functional modifications affecting IRF5 messenger RNA splicing and expression, and have been associated with genetic predisposition to systemic lupus erythematosus (SLE). The aim of this study was to analyze the possible contribution of the IRF5 gene to the predisposition to rheumatoid arthritis (RA). Methods. Three case-control cohorts from Spain (724 RA patients and 542 healthy controls), Sweden (281 RA patients 474 healthy controls), and Argentina (284 RA patients and 286 healthy controls) were independently analyzed. Genotyping for IRF5 rs2004640 and rs2280714 was performed using a TaqMan 5' allele-discrimination assay. Results. In the 3 cohorts studied, no statistically significant differences in allele or genotype frequencies of the rs2004640 and rs2280714 IRF5 polymorphisms were observed between RA patients and controls. Accordingly, haplotype analysis revealed that none of the IRF5 haplotypes was associated with genetic predisposition to RA. Conclusion. Our results suggest that the IRF5 functional polymorphisms analyzed do not seem to be implicated in genetic susceptibility to RA. C1 CSIC, Inst Biomed Lopez Neyra, Granada 18100, Spain. Univ Uppsala, S-75105 Uppsala, Sweden. Hosp Xeral Calde, Lugo, Spain. Univ Madrid, Hosp La Paz, Madrid 3, Spain. Spenshult Hosp Rheumat Dis, Halmstad, Sweden. Ctr Educ Med & Invest Clin, Buenos Aires, DF, Argentina. Hosp Jose M Cullen, Santa Fe, Argentina. Hosp Interzonal Gen Agudos Dr Oscar Alende, Mar Del Plata, Argentina. Sanatorio Parque, Rosario, Argentina. Hosp Virgen Rocio, Seville, Spain. RP Martin, J, CSIC, Inst Biomed Lopez Neyra, Parque Tecnool Ciencias Salud,Ave Conocimiento S-, Granada 18100, Spain. EM martin@ipb.csic.es NR 15 TC 6 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0004-3591 J9 ARTHRITIS RHEUM JI Arthritis Rheum. PD DEC PY 2006 VL 54 IS 12 BP 3815 EP 3819 DI 10.1002/art.22271 PG 5 SC Rheumatology GA 116CS UT ISI:000242780700013 ER PT J AU Esquivel, J Sticca, R Sugarbaker, P Levine, E Yan, TD Alexander, R Baratti, D Bartlett, D Barone, R Barrios, P Bieligk, S Bretcha-Boix, P Chang, CK Chu, F Chu, Q Daniel, S Debree, E Deraco, M Dominguez-Parra, L Elias, D Flynn, R Foster, J Garofalo, A Gilly, FN Glehen, O Gomez-Portilla, A Gonzalez-Bayon, L Gonzalez-Moreno, S Goodman, M Gushchin, V Hanna, N Hartmann, J Harrison, L Hoefer, R Kane, J Kecmanovic, D Kelley, S Kuhn, J LaMont, J Lange, J Li, B Loggie, B Mahteme, H Mann, G Martin, R Misih, RA Moran, B Morris, D Onate-Ocana, L Petrelli, N Philippe, G Pingpank, J Pitroff, A Piso, P Quinones, M Riley, L Rutstein, L Saha, S Alrawi, S Sardi, A Schneebaum, S Shen, P Shibata, D Spellman, J Stojadinovic, A Stewart, J Torres-Melero, J Tuttle, T Verwaal, V Villar, J Wilkinson, N Younan, R Zeh, H Zoetmulder, F Sebbag, G AF Esquivel, J. Sticca, R. Sugarbaker, P. Levine, E. Yan, T. D. Alexander, R. Baratti, D. Bartlett, D. Barone, R. Barrios, P. Bieligk, S. Bretcha-Boix, P. Chang, C. K. Chu, F. Chu, Q. Daniel, S. deBree, E. Deraco, M. Dominguez-Parra, L. Elias, D. Flynn, R. Foster, J. Garofalo, A. Gilly, F. N. Glehen, O. Gomez-Portilla, A. Gonzalez-Bayon, L. Gonzalez-Moreno, S. Goodman, M. Gushchin, V. Hanna, N. Hartmann, J. Harrison, L. Hoefer, R. Kane, J. Kecmanovic, D. Kelley, S. Kuhn, J. LaMont, J. Lange, J. Li, B. Loggie, B. Mahteme, H. Mann, G. Martin, R. Misih, R. A. Moran, B. Morris, D. Onate-Ocana, L. Petrelli, N. Philippe, G. Pingpank, J. Pitroff, A. Piso, P. Quinones, M. Riley, L. Rutstein, L. Saha, S. Alrawi, S. Sardi, A. Schneebaum, S. Shen, P. Shibata, D. Spellman, J. Stojadinovic, A. Stewart, J. Torres-Melero, J. Tuttle, T. Verwaal, V. Villar, J. Wilkinson, N. Younan, R. Zeh, H. Zoetmulder, F. Sebbag, G. TI Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy in the management of peritoneal surface malignancies of colonic origin: A consensus statement SO ANNALS OF SURGICAL ONCOLOGY LA English DT Article ID COLORECTAL-CANCER; CARCINOMATOSIS C1 St Agnes Hosp, Baltimore, MD USA. Univ N Dakota, Altru Hosp, Grand Forks, ND 58201 USA. Washington Hosp Ctr, Washington, DC 20010 USA. Wake Forest Univ, Winston Salem, NC 27109 USA. Univ Maryland, Baltimore, MD 21201 USA. Natl Canc Inst, I-20133 Milan, Italy. Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA. Sharp HealthCare, San Diego, CA USA. Hosp San Pablo, Barcelona, Spain. Baltimore Washington Med Ctr, Glen Burnie, MD USA. Hosp San Jaime, Torrevieja, Spain. Walnut Creek Kaiser Permanente, Walnut Creek, CA USA. St George Hosp, Sydney, NSW, Australia. Louisiana State Univ, Shreveport, LA 71105 USA. Crete Univ Hosp, Sch Med, Iraklion, Greece. Inst Nacl Cancerl, Mexico City, DF, Mexico. Inst Gustave Roussy, Villejuif, France. Creighton Univ, Sch Med, Omaha, NE USA. Osped S Camillo Forlanini, Rome, Italy. Univ Lyon, Lyon, France. Policlin San Jose, Vitoria, Spain. Hosp Gen Univ Gregorio Maranon, Madrid, Spain. MD Anderson Espana, Madrid, Spain. Dorothy E Schneider Canc Ctr, San Mateo, CA USA. Mercy Med Ctr, Baltimore, MD USA. Univ Med & Dent New Jersey, Newark, NJ 07103 USA. Surg Oncol Associates, Newport News, VA USA. Roswell Pk Canc Ctr, Buffalo, NY USA. First Surg Univ Hosp, Belgrade, Serbia. Univ S Florida, H Lee Moffitt Canc Ctr, Tampa, FL 33682 USA. Baylor Univ, Med Ctr, Dallas, TX USA. Johns Hopkins Univ Hosp, Baltimore, MD 21287 USA. Akad Univ Hosp, Uppsala, Sweden. Univ Washington, Seattle, WA 98195 USA. Univ Louisville, Louisville, KY 40292 USA. Helen F Graham Canc Ctr, Newark, DE USA. N Hampshire Hosp, Basingstoke, Hants, England. Hosp Med Sur, Tlalpan, Mexico. Kantonsspital, Dept Surg, St Gallen, Switzerland. NCI, Bethesda, MD 20892 USA. Univ Regensburg, D-8400 Regensburg, Germany. Dekalb Med Ctr, Decatur, GA USA. St Lukes Hosp, Bethlehem, PA USA. Maine Med Ctr, Portland, ME 04102 USA. Miami Valley Hosp, Xenia, OH USA. Tel Aviv Sourasky Med Ctr, Tel Aviv, Israel. Beebe Med Christiana Care, Lewes, DE USA. Walter Reed Army Med Ctr, Washington, DC 20307 USA. Hosp Torrecardenas, Almeria, Spain. Fairview Univ, Med Ctr, Minneapolis, MN USA. Netherlands Canc Inst, Amsterdam, Netherlands. Hosp Virgen Las Nieves, Granada, Spain. Univ Iowa, Iowa City, IA USA. Soroka Univ, Med Ctr, Beer Sheva, Israel. RP Esquivel, J, St Agnes Hosp, Baltimore, MD USA. EM jesusesquivel@yahoo.com NR 11 TC 16 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1068-9265 J9 ANNALS SURG ONCOLOGY JI Ann. Surg. Oncol. PD JAN PY 2007 VL 14 IS 1 BP 128 EP 133 DI 10.1245/s10434-006-9185-7 PG 6 SC Oncology; Surgery GA 117CL UT ISI:000242850200016 ER PT J AU Fynbo, JPU Watson, D Thone, CC Sollerman, J Bloom, JS Davis, TM Hjorth, J Jakobsson, P Jorgensen, UG Graham, JF Fruchter, AS Bersier, D Kewley, L Cassan, A Ceron, JMC Foley, S Gorosabel, J Hinse, TC Horne, KD Jensen, BL Klose, S Kocevski, D Marquette, JB Perley, D Ramirez-Ruiz, E Stritzinger, MD Vreeswijk, PM Wijers, RAM Woller, KG Xu, D Zub, M AF Fynbo, Johan P. U. Watson, Darach Thone, Christina C. Sollerman, Jesper Bloom, Joshua S. Davis, Tamara M. Hjorth, Jens Jakobsson, Pall Jorgensen, Uffe G. Graham, John F. Fruchter, Andrew S. Bersier, David Kewley, Lisa Cassan, Arnaud Ceron, Jose Maria Castro Foley, Suzanne Gorosabel, Javier Hinse, Tobias C. Horne, Keith D. Jensen, Brian L. Klose, Sylvio Kocevski, Daniel Marquette, Jean-Baptiste Perley, Daniel Ramirez-Ruiz, Enrico Stritzinger, Maximilian D. Vreeswijk, Paul M. Wijers, Ralph A. M. Woller, Kristian G. Xu, Dong Zub, Marta TI No supernovae associated with two long-duration gamma-ray bursts SO NATURE LA English DT Article ID EMISSION; COLLAPSE; LIGHT; DISKS; HST AB It is now accepted that long-duration gamma-ray bursts (GRBs) are produced during the collapse of a massive star(1,2). The standard 'collapsar' model(3) predicts that a broad-lined and luminous type Ic core-collapse supernova accompanies every long- duration GRB(4). This association has been confirmed in observations of several nearby GRBs(5-9). Here we report that GRB 060505 ( ref. 10) and GRB 060614 ( ref. 11) were not accompanied by supernova emission down to limits hundreds of times fainter than the archetypal supernova SN 1998bw that accompanied GRB 980425, and fainter than any type Ic supernova ever observed(12). Multi-band observations of the early afterglows, as well as spectroscopy of the host galaxies, exclude the possibility of significant dust obscuration and show that the bursts originated in actively star-forming regions. The absence of a supernova to such deep limits is qualitatively different from all previous nearby long- duration GRBs and suggests a new phenomenological type of massive stellar death. C1 Univ Copenhagen, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Univ Stockholm, AlbaNova, Dept Astron, S-10691 Stockholm, Sweden. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. Univ Heidelberg ZAH, Zentrum AStron, ARI, D-69120 Heidelberg, Germany. Univ Coll Dublin, Sch Phys, Dublin 4, Ireland. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ St Andrews, SUPA Phys Astron, St Andrews KY16 9SS, Fife, Scotland. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. Univ Paris 06, CNRS, UMR 70951, Inst Astrophys Paris, F-75014 Paris, France. Inst Adv Study, Princeton, NJ 08540 USA. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. Univ Chile, Dept Astron, Santiago, Chile. Univ Amsterdam, Astron Inst Anton Pannekoek, Fac Sci, NL-1098 SJ Amsterdam, Netherlands. RP Fynbo, JPU, Univ Copenhagen, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. EM jfynbo@dark-cosmology.dk NR 27 TC 55 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD DEC 21 PY 2006 VL 444 IS 7122 BP 1047 EP 1049 DI 10.1038/nature05375 PG 3 SC Multidisciplinary Sciences GA 118VH UT ISI:000242971100049 ER PT J AU Stratta, G Basa, S Butler, N Atteia, JL Gendre, B Pelangeon, A Malacrino, F Mellier, Y Kann, DA Klose, S Zeh, A Masetti, N Palazzi, E Gorosabel, J Castro-Tirado, AJ Postigo, ADU Jelinek, M Cepa, J Castaneda, H Martinez-Delgado, D Boer, M Braga, J Crew, G Donaghy, TQ Dezalay, JP Doty, J Fenimore, EE Galassi, M Graziani, C Jernigan, JG Kawai, N Lamb, DQ Levine, A Manchanda, RK Martel, F Matsuoka, M Nakagawa, Y Olive, JF Pizzichini, G Prigozhin, G Ricker, G Sakamoto, T Shirasaki, Y Sugita, S Suzuki, M Takagishi, K Tamagawa, T Vanderspek, R Villasenor, J Woosley, SE Yamauchi, M Yoshida, A AF Stratta, G. Basa, S. Butler, N. Atteia, J. L. Gendre, B. Pelangeon, A. Malacrino, F. Mellier, Y. Kann, D. A. Klose, S. Zeh, A. Masetti, N. Palazzi, E. Gorosabel, J. Castro-Tirado, A. J. Postigo, A. de Ugarte Jelinek, M. Cepa, J. Castaneda, H. Martinez-Delgado, D. Boer, M. Braga, J. Crew, G. Donaghy, T. Q. Dezalay, J. -P. Doty, J. Fenimore, E. E. Galassi, M. Graziani, C. Jernigan, J. G. Kawai, N. Lamb, D. Q. Levine, A. Manchanda, R. K. Martel, F. Matsuoka, M. Nakagawa, Y. Olive, J. -F. Pizzichini, G. Prigozhin, G. Ricker, G. Sakamoto, T. Shirasaki, Y. Sugita, S. Suzuki, M. Takagishi, K. Tamagawa, T. Vanderspek, R. Villasenor, J. Woosley, S. E. Yamauchi, M. Yoshida, A. TI X-ray flashes or soft gamma-ray bursts? The case of the likely distant XRF 040912 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : bursts ID HOST GALAXY; STAR-FORMATION; SUPERNOVA; REDSHIFT; DUST; XRF-020903; AFTERGLOW; SPECTRA; STELLAR; 2006AJ AB Context. The origin of X-ray Flashes (XRFs) is still a mystery and several models have been proposed. To disentangle among these models, an important observational tool is the measure of the XRF distance scale, so far available only for a few of them. Aims. In this work, we present a multi-wavelength study of XRF 040912, aimed at measuring its distance scale and the intrinsic burst properties. Methods. We performed a detailed spectral and temporal analysis of both the prompt and the afterglow emission and we estimated the distance scale of the likely host galaxy. We then used the currently available sample of XRFs with known distance to discuss the connection between XRFs and classical Gamma-ray Bursts (GRBs). Results. We found that the prompt emission properties unambiguously identify this burst as an XRF, with an observed peak energy of E-p = 17 +/- 13 keV and a burst fluence ratio S2-30 keV/S30-400 keV > 1. A non-fading optical source with R similar to 24 mag and with an apparently extended morphology is spatially consistent with the X-ray afterglow, likely the host galaxy. XRF 040912 is a very dark burst since no afterglow optical counterpart is detected down to R > 25 mag (3 sigma limiting magnitude) at 13.6 h after the burst. The host galaxy spectrum detected from 3800 angstrom to 10 000 angstrom, shows a single emission line at 9552 angstrom. The lack of any other strong emission lines blue-ward of the detected one and the absence of the Ly alpha cut-off down to 3800 angstrom are consistent with the hypothesis of the [OII] line at redshift z = 1.563 +/- 0.001. The intrinsic spectral properties rank this XRF among the soft GRBs in the E-peak-E-iso diagram. Similar results were obtained for most XRFs at known redshift. Only XRF 060218 and XRF 020903 represent a good example of instrinsic XRF (i-XRF) and are possibly associated with a different progenitor population. This scenario may call for a new definition of XRFs. C1 Observ Midi Pyrenees, Lab Astrophys Toulouse, F-31400 Toulouse, France. Lab Astrophys Marseille, F-13012 Marseille, France. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. IASF Roma, INAF, I-00133 Rome, Italy. Inst Astrophys Paris, F-75014 Paris, France. Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany. IASF Bologna, INAF, I-40129 Bologna, Italy. CSIC, IAA, E-18080 Granada, Spain. Inst Nacl Pesquisas Espaciais, BR-12227010 Sao Jose Dos Campos, Brazil. MIT, Ctr Space Res, Cambridge, MA 02139 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Observ Midi Pyrenees, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RIKEN, Tokyo 3510198, Japan. Tata Inst Fundamental Res, Dept Astron & Astrophys, Bombay 400005, Maharashtra, India. Natl Space Dev Agcy Japan, Tsukuba Space Ctr, Tsukuba, Ibaraki 3058505, Japan. Natl Astron Observ, Mitaka, Tokyo 1818588, Japan. Aoyama Gakuin Univ, Dept Phys, Setagaya Ku, Tokyo 1578572, Japan. Miyazaki Univ, Fac Engn, Miyazaki 8892192, Japan. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan. RP Stratta, G, Observ Midi Pyrenees, Lab Astrophys Toulouse, 14 Av E Belin, F-31400 Toulouse, France. EM gstratta@ast.obs-mip.fr NR 71 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 2007 VL 461 IS 2 BP 485 EP 492 DI 10.1051/0004-6361:20065831 PG 8 SC Astronomy & Astrophysics GA 119HZ UT ISI:000243004700012 ER PT J AU Moreno, O Gonzalez, CI Saaibi, DL Otero, W Badillo, R Martin, J Ramirez, G AF Moreno, Olga Isabel Gonzalez, Clara Luis Saaibi, Diego Otero, William Badillo, Reynaldo Martin, Javier Ramirez, Gerardo TI Polymorphisms in the IL4 and IL4RA genes in Colombian patients with rheumatoid arthritis SO JOURNAL OF RHEUMATOLOGY LA English DT Article DE rheumatoid arthritis; interleukin 4; genetic predisposition ID COLLAGEN-INDUCED ARTHRITIS; DENDRITIC CELLS; INTERLEUKIN-4 RECEPTOR; CYTOKINE PRODUCTION; ATOPIC-DERMATITIS; IL-12 PRODUCTION; T-CELLS; IN-VIVO; ASSOCIATION; ASTHMA AB Objective. Rheumatoid arthritis (RA) is considered a Th1-driven disease. Interleukin 4 (IL-4) binds to its receptor, promoting Th2 differentiation and limiting Th1 responses, but its role in the pathogenesis of RA is conflicting. We analyzed 2 polymorphisms of the IL4 gene and 4 polymorphisms of the IL4RA gene in patients with RA and in a control population, as well as rheumatoid factor (RF) seropositivity, titers of RF, and history of replacement joint surgery among patients with RA. Methods. The study population consisted of 102 patients with RA and 102 matched healthy controls. Genotyping of IL4-590, IL4RA +148, +1124, +1218, and +1902 was determined by restriction fragment length polymorphism-polymerase chain reaction (PCR) and sequence-specific primer-PCR. IL4 variable number tandem repeat polymorphism was determined by direct amplification. Results. The IL4-590TT genotype was significantly more frequent in patients with RA than in controls (p = 0.018, OR 3.34, 95% CI 1.08-11.04). The IL4RA +148A allele was significantly associated with the presence of RF (p = 0.0019, OR 2.55, 95% CI 1.55-4.86) and a history of articular joint replacement (p = 0.024, OR 2.08, 95% CI 1.04-4.18). The IL4RA +19026 allele was more frequently seen in patients with RA and high RF titers (p = 0.00067, OR 4, 95% CI 1.64-9.93). Conclusion. Highly complex pathways lead to the development of RA and may not be similar in all patients. Our findings of higher frequency of IL4 and IL4RA genotypes and alleles with RA, presence of RF, RF titers, and history of articular joint replacement support the polygenic expression of RA and the likely role of IL-4 in influencing its initiation and development. C1 Univ Ind Santander, Lab Inmunol & Biol Mol, Fac Salud, Grp Inmunol & Epidemiol Mol, Bucaramanga 678, Colombia. Clin Carlos Ardila Lulle, Floridablanca, Santander, Spain. Univ Ind Santander, Dept Med Interna, Fac Salud, Bucaramanga, Colombia. Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. RP Ramirez, G, Univ Ind Santander, Lab Inmunol & Biol Mol, Fac Salud, Grp Inmunol & Epidemiol Mol, Carrera 32 29-31, Bucaramanga 678, Colombia. EM gemensu@yahoo.com NR 58 TC 4 PU J RHEUMATOL PUBL CO PI TORONTO PA 920 YONGE ST, SUITE 115, TORONTO, ONTARIO M4W 3C7, CANADA SN 0315-162X J9 J RHEUMATOL JI J. Rheumatol. PD JAN PY 2007 VL 34 IS 1 BP 36 EP 42 PG 7 SC Rheumatology GA 125UC UT ISI:000243467300008 ER PT J AU Pereira, CB Miranda, LF AF Pereira, C. B. Miranda, L. F. TI Spectroscopic survey of post-AGB star candidates SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : AGB and post-AGB; HII regions; stars : pre-main sequence ID PLANETARY-NEBULAE; PROTOPLANETARY NEBULAE; EMISSION-LINE; IRAS SOURCES; YOUNG STARS; ATLAS; IDENTIFICATION; PHOTOMETRY; STANDARDS; ANGSTROM AB Aims. Our goal is to establish the true nature of post-AGB star candidates and to identify new post-AGB stars. Methods. We used low resolution optical spectroscopy and we compared the spectra of the candidate post-AGB stars with those of stars in the library specta available in the literature and with spectra of "standard" post-AGB stars, and direct imaging in narrow-band filters. Results. Spectra were obtained for 16 objects: 14 objects have not been observed previously and 2 objects are already known post-AGB stars used as "standards" for identification. From the spectra we identify: six new post-AGB stars with spectral types between G5 and F5, two HII regions the morphology of which is revealed in the direct images for the first time, a G giant with infrared emission, a young stellar object, a probable post-AGB star with emission lines and three objects for which the classification is still unclear. As a whole, our results provide new, reliable identifications for 10 objects among listed post-AGB star candidates. C1 Observ Nacl, MCT, BR-20921400 Rio De Janeiro, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Pereira, CB, Observ Nacl, MCT, Rua Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil. EM claudio@on.br lfm@iaa.es NR 41 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JAN PY 2007 VL 462 IS 1 BP 231 EP U19 DI 10.1051/0004-6361:20054529 PG 10 SC Astronomy & Astrophysics GA 126KW UT ISI:000243512800028 ER PT J AU Del Papa, MF Pistorio, M Draghi, WO Lozano, MJ Giusti, MA Medina, C van Dillewijn, P Martinez-Abarca, F Flores, BM Ruiz-Sainz, JE Megias, M Puhler, A Niehaus, K Toro, N Lagares, A AF Del Papa, M. F. Pistorio, M. Draghi, W. O. Lozano, M. J. Giusti, M. A. Medina, C. van Dillewijn, P. Martinez-Abarca, F. Flores, B. Moron Ruiz-Sainz, J. E. Megias, M. Puehler, A. Niehaus, K. Toro, N. Lagares, A. TI Identification and characterization of a nodH ortholog from the alfalfa-nodulating Or191-like rhizobia SO MOLECULAR PLANT-MICROBE INTERACTIONS LA English DT Article ID GRAM-NEGATIVE BACTERIA; BROAD-HOST-RANGE; VITRO SULFOTRANSFERASE ACTIVITY; LIPO-OLIGOSACCHARIDE SIGNALS; TRANSCRIPTION START SITES; PHASEOLUS-VULGARIS; MUTATIONAL ANALYSIS; SULFATE ACTIVATION; SPECIFICITY GENE; MOLECULAR-BASIS AB Nodulation of Medicago sativa (alfalfa) is known to be restricted to Sinorhizobium meliloti and a few other rhizobia that include the poorly characterized isolates related to Rhizobium sp. strain Or191. Distinctive features of the symbiosis between alfalfa and S. meliloti are the marked specificity from the plant to the bacteria and the strict requirement for the presence of sulfated lipochitooligosaccharides (Nod factors [NFs]) at its reducing end. Here, we present evidence of the presence of a functional nodH-encoded NF sulfotransferase in the Or191-like rhizobia. The nodH gene, present in single copy, maps to a high molecular weight megaplasmid. As in S. meliloti, a nodF homolog was identified immediately upstream of nodH that was transcribed in the opposite direction (local synteny). This novel nodH ortholog was cloned and shown to restore both NF sulfation and the Nif(+)Fix(+) phenotypes when introduced into an S. meliloti nodH mutant. Unexpectedly, however, nodH disruption in the Or191-like bacteria did not abolish their ability to nodulate alfalfa, resulting instead in a severely delayed nodulation. In agreement with evidence from other authors, the nodH sequence analysis strongly supports the idea that the Or191-like rhizobia most likely represent a genetic mosaic resulting from the horizontal transfer of symbiotic genes from a sinorhizobial megaplasmid to a not yet clearly identified ancestor. C1 Natl Univ La Plata, Fac Ciencias Exactas, Inst Bioquim & Biol Mol, RA-1900 La Plata, Argentina. Univ Seville, Fac Biol, Dept Microbiol, E-41080 Seville, Spain. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sist Simbiot, E-18008 Granada, Spain. Univ Seville, Fac Farm, Dept Microbiol & Parasitol, E-41071 Seville, Spain. Univ Bielefeld, Lehrstuhl Genet, D-4800 Bielefeld, Germany. RP Lagares, A, Natl Univ La Plata, Fac Ciencias Exactas, Inst Bioquim & Biol Mol, Calles 47 & 115, RA-1900 La Plata, Argentina. EM lagares@biol.unlp.edu.ar NR 52 TC 0 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA SN 0894-0282 J9 MOL PLANT MICROBE INTERACTION JI Mol. Plant-Microbe Interact. PD FEB PY 2007 VL 20 IS 2 BP 138 EP 145 PG 8 SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Plant Sciences GA 126VA UT ISI:000243542400004 ER PT J AU Cornejo, P Borie, F Rubio, R Azcon, R AF Cornejo, P. Borie, F. Rubio, R. Azcon, R. TI Influence of nitrogen source on the viability, functionality and persistence of Glomus etunicatum fungal propagules in an Andisol SO APPLIED SOIL ECOLOGY LA English DT Article DE AM fungal propagules; nitrogen source; Andisol ID ARBUSCULAR MYCORRHIZAL FUNGI; LACTUCA-SATIVA L; ALLIUM-CEPA L; MINERAL ACQUISITION; HYPHAL DENSITY; ACIDIC SOIL; GROWTH; PHOSPHORUS; ROOT; AMMONIUM AB This study investigated how two different N sources used as fertilizer (NO3- or NH4+) interact with an inoculated arbuscular mycorrhizal (AM) fungus (Glomus etunicatum) in an Andisol from southern Chile. The effect of NO3- or NH4+ on mycorrhizal and non-mycorrhizal wheat plants was measured on key root-soil interface activities: pH, acid phosphatase (P-ase) activity and P availability. Root AM colonization, extraradical mycelium length and spore number were also examined at three stages of AM symbiosis development (120, 150 and 240 days after sowing, DAS). The effect of N-source on AM propagule formation was used as an index of the quality and vigor of AM colonization. Mycorrhizal root length was greater with NO3- than with NH4+ at all times. The NO3- source also improved extraradical mycelium density, which reached its maximum at 150 DAS. At each harvest the spore number in the rhizosphere soil was also greater with NO3- fertilization. This NO3- effect on spore formation ranged from 20% at a 120 DAS to 287% at a 240 DAS increase, compared with NH4+. Extraradical mycelium and AM efficiency for P acquisition appeared to be related. The particular fungus/plant metabolism as affected by N sources (NO3- or NH4+) applied did not result in differential plant growth or in changes in N plant acquisition, but affected AM development and activity. Differences in soil pH, available P or P-ase activity in soil seems not to be responsible for the improved physiological status of mycorrhizal development in NO3- fed plants. Mycorrhizal propaguide formation in this soil and the high persistence of extraradical mycelium are important factors which may have a strong influence on the next crop, and thus, this aspects should be considered when a cropping system is designed. The influence of N sources on AM performance is of ecological and practical interest in volcanic soils when conventional management is used. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ La Frontera, Dept Ciencias Quim, Temuco, Chile. CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, E-18008 Granada, Spain. RP Borie, F, Univ La Frontera, Dept Ciencias Quim, POB 54-D, Temuco, Chile. EM fborie@ufro.cl NR 49 TC 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0929-1393 J9 APPL SOIL ECOL JI Appl. Soil Ecol. PD FEB PY 2007 VL 35 IS 2 BP 423 EP 431 DI 10.1016/j.apsoil.2006.06.006 PG 9 SC Soil Science GA 126XG UT ISI:000243548200017 ER PT J AU Netopil, M Paunzen, E Maitzen, HM Pintado, OI Claret, A Miranda, LF Iliev, IK Casanova, V AF Netopil, M. Paunzen, E. Maitzen, H. M. Pintado, O. I. Claret, A. Miranda, L. F. Iliev, I. Kh. Casanova, V. TI CCD photometric search for peculiar stars in open clusters - VIII. King 21, NGC 3293, NGC 5999, NGC 6802, NGC 6830, Ruprecht 44, Ruprecht 115, and Ruprecht 120 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : chemically peculiar; stars : early-type; techniques : photometric; open clusters and associations : general ID 5200-ANGSTROM FLUX DEPRESSION; GALACTIC OPEN CLUSTERS; YOUNG OPEN CLUSTERS; DELTA-A-PHOTOMETRY; B-TYPE STARS; CHEMICALLY PECULIAR; INTEGRATED SPECTRA; MAIN-SEQUENCE; PARAMETERS; CALIBRATIONS AB Context. We continue our survey of magnetic chemically peculiar (CP2) stars in galactic open clusters to shed more light on their origin and evolution. Aims. To study the group of CP2 stars, it is essential to find these objects in different galactic environments and at a wide range of evolutionary stages. The knowledge of open cluster ages and metallicities can help for finding a correlation between these parameters and the (non-)presence of peculiarities, which has to be taken into account in stellar evolution models. Methods. The intermediate band. a photometric system samples the depth of the 5200 angstrom flux depression by comparing the flux at the centre with the adjacent regions with bandwidths of 110 angstrom to 230 angstrom. It is capable of detecting magnetic CP2 and CP4 stars with high efficiency, but also the groups of (metal-weak) lambda Bootis and classical Be/shell stars can be successfully investigated. In addition, it allows the age, reddening, and distance modulus to be determined with appropriate accuracy by fitting isochrones. Results. From the 1677 observed members of the eight open clusters, one Ae and twenty-five CP2 stars were identified. Furthermore nineteen deviating stars are designated as questionable for several reasons. The estimated age, reddening, and distance for the programme clusters were compared with published values of the literature and discussed in this context. Conclusions. The current paper shows that CP2 stars are continuously present in very young (7 Myr) to intermediate age (500 Myr) open clusters at distances greater than 2 kpc from the Sun. C1 Univ Vienna, Inst Astron, A-1180 Vienna, Austria. Univ Nacl Tucuman, Consejo Nacl Invest Cient & Tecn, Fac Ciencias Exactas & Tecnol, Dept Fis, RA-4000 San Miguel De Tucuman, Tucuman, Argentina. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Astron Observ, Inst Astron, Smoljan 4700, Bulgaria. RP Netopil, M, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria. EM Martin.Netopil@univie.ac.at NR 46 TC 3 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 2007 VL 462 IS 2 BP 591 EP U200 DI 10.1051/0004-6361:20066076 PG 12 SC Astronomy & Astrophysics GA 128VH UT ISI:000243686600018 ER PT J AU Tafoya, D Gomez, Y Anglada, G Loinard, L Torrelles, JM Miranda, LF Osorio, M Franco-Hernandez, R Nyman, LA Nakashima, J Deguchi, S AF Tafoya, D. Gomez, Y. Anglada, G. Loinard, L. Torrelles, J. M. Miranda, L. F. Osorio, M. Franco-Hernandez, R. Nyman, L. -A. Nakashima, J. Deguchi, S. TI Detection of HCO+ emission toward the planetary nebula K3-35 SO ASTRONOMICAL JOURNAL LA English DT Article DE circumstellar matter; ISM : molecules; planetary nebulae : general; radio lines : ISM; stars : individual (K3-35) ID ASYMPTOTIC GIANT BRANCH; WATER-MASER EMISSION; RADIO MORPHOLOGY; CO; ENVELOPES; STARS AB We report the detection, for the first time, of HCO+(J = 1 -> 0) emission, as well as marginal CO(J = 1 -> 0) emission, toward the planetary nebula (PN) K3-35 as a result of a molecular survey carried out toward this source. We also report new observations of the previously detected CO( J 2 ! 1) and water maser emission, as well as upper limits for the emission of the SiO, (HCO+)-C-13, HNC, HCN, HC3OH, HC5N, CS, HC3N, (CO)-C-13, CN, and NH3 molecules. From the ratio of CO(J = 2 -> 1) to CO(J = 1 -> 0) emission we have estimated the kinetic temperature of the molecular gas, obtaining a value of similar or equal to 20 K. Using this result we have estimated a molecular mass for the envelope of similar or equal to 0.017M(circle dot) and an HCO+ abundance relative to H-2 of 6 x 10(-7), similar to the abundances found in other PNe. K3-35 is remarkable because it is one of the two PNe reported to exhibit water maser emission, which is present in the central region, as well as at a distance of similar or equal to 5000 AU from the center. The presence of molecular emission provides some clues that could help in understanding the persistence of water molecules in the envelope of K3-35. The HCO+ emission could be arising in dense molecular clumps, which may provide the shielding mechanism that protects water molecules in this source. C1 UNAM, Ctr Radioastron & Astrofis, Morelia, Michoacan, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. CSIC, Inst Astrofis Andalucia, Granada, Spain. Univ Barcelona, Fac Fis, Inst Ciencias Espacio, E-08028 Barcelona, Spain. Univ Barcelona, Inst Estudis Espacials Catalunya, E-08028 Barcelona, Spain. European So Observ, Swedish ESO Submillimetre Telescope, Santiago 19, Chile. Onsala Space Observ, Onsala, Sweden. Acad Sinica, Inst Astron & Astrophys, Taipei 115, Taiwan. Grad Univ Adv Studies, Dept Astron Sci, Nobeyama Observ, Minamisa Ku, Nagano, Japan. RP Tafoya, D, UNAM, Ctr Radioastron & Astrofis, Morelia, Michoacan, Mexico. EM d.tafoya@astrosmo.unam.mx y.gomez@astrosmo.unam.mx guillem@iaa.es l.loinard@astrosmo.unam.mx torrelles@ieec.fcr.es lfm@iaa.es osorio@iaa.es rfranco@cfa.harvard.edu lnyman@eso.org junichi@asiaa.sinica.edu.tw deguchi@nro.nao.ac.jp NR 27 TC 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 2007 VL 133 IS 2 BP 364 EP 369 PG 6 SC Astronomy & Astrophysics GA 129LC UT ISI:000243730000002 ER PT J AU Sanchez, N Alfaro, EJ Perez, E AF Sanchez, Nestor Alfaro, Emilio J. Perez, Enrique TI Fractal dimension of interstellar clouds: Opacity and noise effects SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM : clouds; ISM : individual (Ophiuchus, Orion, Perseus molecular cloud); ISM : structure ID MOLECULAR CLOUDS; COMPLEXES; GEOMETRY AB There exists observational evidence that the interstellar medium has a fractal structure in a wide range of spatial scales. The measurement of the fractal dimension (D-f) of interstellar clouds is a simple way to characterize this fractal structure, but several factors, both intrinsic to the clouds and to the observations, may contribute to affect the values obtained. In this work, we study the effects that opacity and noise have on the determination of D-f. We focus on two different fractal dimension estimators, namely, the perimeter-area-based dimension (D-per) and the mass-size dimension (D-m). We first use simulated fractal clouds to show that opacity does not affect the estimation of D-per. However, D-m tends to increase as opacity increases, and this estimator fails when applied to optically thick regions. In addition, very noisy maps can seriously affect the estimation of both D-per and D-m, decreasing the final estimation of D-f. We apply these methods to emission maps of the Ophiuchus, Perseus, and Orion molecular clouds in different molecular lines, and we obtain that the fractal dimension is always in the range 2.6 less than or similar to D-f less than or similar to 2.8 for these regions. These results support the idea of a relatively high (>2.3) average fractal dimension for the interstellar medium, as traced by different chemical species. C1 CSIC, Inst Astrofis Andalucia, Granada, Spain. Univ Zulia, Dept Fis, Maracaibo 4011, Venezuela. RP Sanchez, N, CSIC, Inst Astrofis Andalucia, Granada, Spain. EM nestor@iaa.es emilio@iaa.es eperez@iaa.es NR 16 TC 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 2007 VL 656 IS 1 PN Part 1 BP 222 EP 226 PG 5 SC Astronomy & Astrophysics GA 133SD UT ISI:000244032600018 ER PT J AU Humphrey, A Villar-Martin, M Fosbury, R Binette, L Vernet, J De Breuck, C Alighieri, SD AF Humphrey, A. Villar-Martin, M. Fosbury, R. Binette, L. Vernet, J. De Breuck, C. di Serego Alighieri, S. TI Giant Ly alpha nebulae around z > 2 radio galaxies: evidence for infall SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE galaxies : active; galaxies : evolution; galaxies : high-redshift; galaxies : jets ID QUASI-STELLAR OBJECTS; EMISSION-LINE GAS; HIGH-REDSHIFT; SPECTRAL INDEX; REPRESENTATIVE SAMPLE; INFRARED-SPECTROSCOPY; OPTICAL ASYMMETRIES; DEEP SPECTROSCOPY; CORRELATED RADIO; LOUD QUASARS AB We present an investigation into the possible relationship between side-to-side asymmetries of powerful radio galaxies at high redshift, with the goal of understanding the geometry, orientation and gas dynamics of these sources. Our sample consists of 11 radio galaxies at 2.3 <= z <= 3.6 previously known to have giant, kinematically quiescent nebulae. We identify several correlated asymmetries: on the side of the brightest radio jet and hotspot (i) the redshift of the kinematically quiescent nebula is highest, (ii) Ly alpha is brighter relative to the other lines and continuum, (iii) the radio spectrum is flattest and (iv) the radio structure has its highest polarization. These asymmetries are not found to be correlated with either the radio arm length asymmetry or the brightness asymmetry of the UV-optical emitting material. The correlation between the radio brightness asymmetry and the radial velocity of the quiescent gas also appears to be present in powerful radio galaxies with 0 less than or similar to z less than or similar to 1. Collectively, these asymmetries are most naturally explained as an effect of orientation, with the quiescent nebulae in infall: this is the first study to distinguish between the rotation, infall, outflow and chaotic motion scenarios for the kinematically quiescent emission-line nebulae around powerful active galactic nuclei. C1 Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. ST ECF, D-85748 Garching, Germany. European So Observ, D-85748 Garching, Germany. Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy. RP Humphrey, A, Univ Nacl Autonoma Mexico, Astron Inst, Ap 70-264, Mexico City 04510, DF, Mexico. EM ahumphre@astroscu.unam.mx NR 95 TC 2 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD FEB 21 PY 2007 VL 375 IS 2 BP 705 EP 714 DI 10.1111/j.1365-2966.2006.11344.x PG 10 SC Astronomy & Astrophysics GA 134KY UT ISI:000244083100025 ER PT J AU Marilli, E Frasca, A Covino, E Alcala, JM Catalano, S Fernandez, M Ferro, AA Rubio-Herrera, E Spezzi, L AF Marilli, E. Frasca, A. Covino, E. Alcala, J. M. Catalano, S. Fernandez, M. Arellano Ferro, A. Rubio-Herrera, E. Spezzi, L. TI Rotational periods of solar-mass young stars in Orion SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : pre-main sequence; X-ray : stars; stars : activity; techniques : photometric; ISM : individual objects : Orion ID PRE-MAIN-SEQUENCE; T-TAURI STARS; X-RAY-EMISSION; ALL-SKY SURVEY; TIME-SERIES ANALYSIS; CLOSE BINARY STARS; STELLAR ROTATION; TIDAL EVOLUTION; KH 15D; NEBULA CLUSTER AB Context. The evolution of the angular momentum in young low-mass stars is still a debated issue. The stars presented here were discovered as X-ray sources in the ROSAT All-Sky Survey (RASS) of the Orion complex and subsequently optically identified thanks to both low and high resolution spectroscopy. Aims. The determination of the rotational periods in young low-mass stars of different age is fundamental for the understanding of the angular momentum evolution. Methods. We performed a photometric monitoring program on a sample of 40 solar-mass young stars in the Orion star-forming region, almost all previously identified as weak T Tauri stars (WTTS) candidates. Photometric B and V data were collected from 1999 to 2006 at Catania Astrophysical Observatory (OAC). Data were also acquired in December 1998 at Calar Alto Observatory (CA) and in 1999, 2000, and 2003 at San Pedro Martir (SPM). From the observed rotational modulation, induced by starspots, we derived the rotation periods, using both the Lomb-Scargle periodogram and the CLEAN deconvolution algorithms. Results. In total, we were able to determine the rotation periods for 39 stars, spanning from about 0.5 to 13 days, showing a rather flat distribution with a peak around 1-2 days. Though some of these stars were found to be spectroscopic binaries, only the systems with shorter orbital periods and circular orbits turned out to be synchronized. In the other cases, the rotational period is shorter than the period of pseudo-synchronization at periastron. Conclusions. The new data provide further evidence for the spin up of solar-mass stars predicted by models of angular momentum evolution of pre-main sequence (PMS) stars. C1 Osserv Astrofis Catania, INAF, I-95123 Catania, Italy. Osserv Astron Capodimonte, INAF, I-80131 Naples, Italy. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Marilli, E, Osserv Astrofis Catania, INAF, Via S Sofia 78, I-95123 Catania, Italy. EM emarilli@oact.inaf.it NR 50 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2007 VL 463 IS 3 BP 1081 EP U92 DI 10.1051/0004-6361:20066458 PG 16 SC Astronomy & Astrophysics GA 136MX UT ISI:000244229900029 ER PT J AU Villar-Martin, M Humphrey, A De Breuck, C Fosbury, R Binette, L Vernet, J AF Villar-Martin, M. Humphrey, A. De Breuck, C. Fosbury, R. Binette, L. Vernet, J. TI Ly alpha excess in high-redshift radio galaxies: a signature of star formation SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE galaxies : active; galaxies : evolution; cosmology : observations; early Universe ID CONTINUUM EMISSION; HII GALAXY; 4C 41.17; LINE; SPECTROSCOPY; LYMAN; DUST; IONIZATION; SHOCKS; Z-SIMILAR-TO-2.5 AB About 54 per cent of radio galaxies at z >= 3 and 8 per cent of radio galaxies at 2 less than or similar to z < 3 show unusually strong Ly alpha emission, compared with the general population of high-redshift ( z greater than or similar to 2) radio galaxies. These Ly alpha-excess objects (LAEs) show Ly alpha/He II values consistent with or above standard photoionization model predictions. We reject with confidence several scenarios to explain the unusual strength of Ly alpha in these objects: shocks, low nebular metallicities, high gas densities and absorption/ scattering effects. We show that the most successful explanation is the presence of a young stellar population which provides the extra supply of ionizing photons required to explain the Ly alpha excess in at least the most extreme LAEs ( probably in all of them). This interpretation is strongly supported by the tentative trend found by other authors for z >= 3 radio galaxies to show lower ultraviolet rest-frame polarization levels, or the dramatic increase in the detection rate at submm wavelengths of z > 2.5 radio galaxies. The enhanced star formation activity in LAEs could be a consequence of a recent merger which has triggered both the star formation and the active galactic nucleus/radio activities. The measurement of unusually high Ly alpha ratios in the extended gas of some high-redshift radio galaxies suggests that star formation activity occurs in spatial scales of tens of kpc. We argue that, although the fraction of LAEs may be incompletely determined, both at 2 less than or similar to z < 3 and at z >= 3, the much larger fraction of LAEs found at z >= 3 is a genuine redshift evolution and not due to selection effects. Therefore, our results suggest that the radio galaxy phenomenon is more often associated with a massive starburst at z > 3 than at z < 3. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico. European So Observ, D-85748 Garching, Germany. ST ECF, D-85748 Garching, Germany. RP Villar-Martin, M, CSIC, Inst Astrofis Andalucia, Aptdo 3004, E-18080 Granada, Spain. EM montse@iaa.es NR 51 TC 6 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAR 11 PY 2007 VL 375 IS 4 BP 1299 EP 1310 DI 10.1111/j.1365-2966.2006.11371.x PG 12 SC Astronomy & Astrophysics GA 139GE UT ISI:000244419500014 ER PT J AU Villadas, PJ Fernandez-Lopez, M Ramirez-Saad, H Toro, N AF Villadas, P. J. Fernandez-Lopez, M. Ramirez-Saad, H. Toro, N. TI Rhizosphere-bacterial community in Eperua falcata (Caesalpiniaceae) a putative nitrogen-fixing from French Guiana rainforest SO MICROBIAL ECOLOGY LA English DT Article ID RIBOSOMAL-RNA ANALYSIS; MICROBIAL COMMUNITY; SOIL BACTERIA; NIFH GENE; DIVERSITY; MICROORGANISMS; TREES; ECOSYSTEMS; DELTA-N-15; NODULATION AB The rainforest of French Guiana is still largely unaffected by human activity. Various pristine sites like the Paracou Research Station are devoted to study this tropical ecosystem. We used culture-independent techniques, like polymerase chain reaction-temperature gradient gel electrophoresis, and construction of clone libraries of partial 16S rRNA and nifH genes, to analyze the composition of the bacterial community in the rhizosphere of mature trees of Eperua falcata and Dicorynia guianensis, both species within the Caesalpiniaceae family. E. falcata is one of the more abundant pioneer tree species in this ecosystem and so far, no root nodules have ever been found. However, its nitrogen-fixing status is regarded as "uncertain", whereas D. guianensis is clearly considered a non-nitrogen- fixing plant. The rhizospheres of these mature trees contain specific bacterial communities, including several currently found uncultured microorganisms. In these communities, there are putative nitrogen-fixing bacteria specifically associated to each tree: D. guianensis harbors several Rhlzoblum spp. and E. falcata members of the genera Burkholderla and Bradyrhizobium. In addition, nifH sequences in the rhizosphere of the latter tree were very diverse. Retrieved sequences were related to bacteria belonging to the alpha(-), beta(-), and gamma-Protcobacteria in the E. falcata rhizoplane, whereas only two sequences related to y-Proteobacteria were found in D. guianensis. Differences in the bacterial communities and the abundance and diversity of nijli sequences in E. falcata rhizosphere suggest that this tree could obtain nitrogen through a nonnodulating bacterial interaction. C1 CSIC, Estac Expt Zaidin, Grp Ecol Genet, E-18008 Granada, Spain. Univ Autonoma Metropolitana Xochimilco, Dept Sist Biol, Mexico City 04960, DF, Mexico. RP Toro, N, CSIC, Estac Expt Zaidin, Grp Ecol Genet, C Prof Albareda 1, E-18008 Granada, Spain. EM ntoro@eez.csic.es NR 37 TC 0 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0095-3628 J9 MICROBIAL ECOL JI Microb. Ecol. PD FEB PY 2007 VL 53 IS 2 BP 317 EP 327 DI 10.1007/s00248-006-9158-1 PG 11 SC Ecology; Marine & Freshwater Biology; Microbiology GA 142JM UT ISI:000244645600013 ER PT J AU Pereira, TMD Suarez, JC Lopes, I Martin-Ruiz, S Amado, PJ Garrido, R Rodriguez, E Costa, V Rolland, A Ferro, AA Sareyan, JP AF Pereira, T. M. D. Suarez, J. C. Lopes, I. Martin-Ruiz, S. Amado, P. J. Garrido, R. Rodriguez, E. Costa, V. Rolland, A. Ferro, A. Arellano Sareyan, J. -P. TI Searching for signatures of stochastic excitation in stellar pulsations: a look at gamma Doradus stars SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE methods : statistical; stars : statistics; stars : oscillations; stars : fundamental parameters ID FREQUENCY RATIO METHOD; VARIABLE-STARS; DELTA-SCUTI; CLUSTER; DOZEN AB In stellar oscillations, the temporal variation in the amplitude of a given mode can yield some information about the interior of the star. In what concerns the excitation mechanism, it has been shown that for oscillations that are excited and damped by a physical process in stochastic equilibrium, the ratio of the standard deviation of the amplitude sigma(A) over the amplitude mean value mu(A) is of the order of 0.52. This "statistical signature" is a general property of stochastically excited oscillations, so it can be used with any type of star-making it a powerful tool. Although the method is simple, its reliability and robustness have yet to be proven. With the help of simulations, these points are addressed in the present work, and the observational requirements for this method to work are more clearly defined. We show that a number of amplitude measurements of about 10(2) are required to get a good estimate of sigma(A)/mu(A). The method is also tested against the complication of having a time series crowded with many modes (unresolvable in short time series), and results show that the theoretical relation of sigma(A)/mu(A) still holds true. Some of the motivation behind the new tests of the method involves applying it to gamma Doradus stars. The open question of what drives oscillations in these stars makes this statistical method very interesting when applied to gamma Doradus stars. A test of the method is performed using. Doradus observations. As expected, the results are inconclusive and demonstrate how ground-based observations of. Doradus stars hardly fulfill the applicability requirements of the method. We show, however, how a possible scenario of stochastic excitation in these stars could be detected with the COROT space mission. C1 Inst Super Tecn, Ctr Multidisciplinar Astrofis, P-1049001 Lisbon, Portugal. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Ctr Geofis Evora, Dept Fis, Evora, Portugal. Univ Granada, Dept Fis Teor & Cosmos, Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Observ Cote Azur, GEMINI, UMR 6203, F-06304 Nice 4, France. RP Pereira, TMD, Inst Super Tecn, Ctr Multidisciplinar Astrofis, Av Rovisco Pais, P-1049001 Lisbon, Portugal. EM tiago@mso.anu.edu.au NR 30 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2007 VL 464 IS 2 BP 659 EP 665 DI 10.1051/0004-6361:20065355 PG 7 SC Astronomy & Astrophysics GA 142VU UT ISI:000244679500032 ER PT J AU Robledo, G Gonzalez, CI Morillo, C Martin, J Gonzalez, A AF Robledo, G. Gonzalez, C. I. Morillo, C. Martin, J. Gonzalez, A. TI Association study of PTPN22 C1858T polymorphism in Trypanosoma cruzi infection SO TISSUE ANTIGENS LA English DT Article DE Chagas' disease; protein tyrosine; phosphatase nonreceptor 22 (PTPN22) gene; Trypanosoma cruzi ID PROTEIN-TYROSINE-PHOSPHATASE; SINGLE-NUCLEOTIDE POLYMORPHISM; CHAGAS-DISEASE; RHEUMATOID-ARTHRITIS; FUNCTIONAL VARIANT; R620W POLYMORPHISM; GENE; CARDIOMYOPATHY; KINASE; ALLELE AB In this study we investigated a possible role for the single nucleotide polymorphism C1858T of the PTPN22 (protein tyrosine phosphatase nonreceptor 22) gene in determining the susceptibility to Trypanosoma cruzi infection, as well as in development of chagasic heart disease. This study included 316 patients with Chagas' disease and 520 healthy individuals from Colombia and Peru. Genotyping of PTPN22 was performed by the real-time polymerase chain reaction technology, using the TaqMan 5' allelic discrimination assay. No statistically significant differences in the frequency of PTPN22 C1858T gene polymorphism between chagasic patients and controls or between asymptomatic and cardiomyopathic individuals were observed. Our findings suggest that the PTPN22 polymorphism analyzed does not play a major role in the development of Chagas' disease in the Colombian and Peruvian populations. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. Univ Ind Santander, Fac Salud, Grp Immunol & Epidemiol Mol, Bucaramanga, Colombia. Fdn Cardiovasc Colombia, Unidad Sistema Nervioso Autonomo, Floridablanca, Colombia. RP Martin, J, CSIC, Inst Parasitol & Biomed Lopez Neyra, Parque Tecnol Campus Salud,Avd Conocimiento S-N, Granada 18100, Spain. EM martin@ipb.csic.es NR 25 TC 1 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0001-2815 J9 TISSUE ANTIGEN JI Tissue Antigens PD MAR PY 2007 VL 69 IS 3 BP 261 EP 264 DI 10.1111/j.1399-0039.2007.00800.x PG 4 SC Cell Biology; Immunology; Pathology GA 147YF UT ISI:000245041000009 ER PT J AU Passera, CB Allegretti, LI Robles, AB AF Passera, C. B. Allegretti, L. I. Robles, A. B. TI Effect of nonprescribed fire on an Atriplex lampa community, in the Guadal Plateau of Mendoza Province, Argentina SO ARID LAND RESEARCH AND MANAGEMENT LA English DT Article DE burned areas; carrying capacity; forage cover; resprouting capacity ID CENTRAL SEMIARID ARGENTINA; CENTRAL MONTE DESERT; ADENOSTOMA-FASCICULATUM; CHIHUAHUAN DESERT; PLAINS ARGENTINA; SEED DISPERSAL; SHORT-TERM; VEGETATION; MANAGEMENT; REPRODUCTION AB The purpose of the present study was to determine the effect of a single nonprescribed fire on species community composition, woody and herbaceous species diversity, carrying capacity, density of dominating shrubs, and their resprouting capacity after fire. For short and long-term evaluations, two sites were chosen in a private extensive cattle ranch: (1) unburned areas and (2) burned areas. The forage total cover before fire (initial stage) was 54%; this cover decreased in burned areas to 13% (1986) and to 25% (2000), mainly due to a reduction in forage shrub cover. The cover of Atriplex lampa (zampa), the dominant forage shrub, decreased from 17.0 to 0.20% in 1986 after fire, and 15 years later this value remains constant (0.33%). The same area showed a carrying capacity, expressed in hectares per large stock unit (LSU), of 10 haLSU(-1) by 1986 and 17 haLSU(-1) by 2000, whereas in unburned areas it was 7 haLSU(-1), similar to prewildfire. All selected species that had been cut, simulating the action of fire, resprouted 1 year later, except zampa. We determined that the re-establishment of zampa plants in burned areas is extremely slow. Conditions as absence of adventitious bud/root crown and drought in following post-fire years may have determined the poor recovery of A. lampa. C1 Univ Nacl Cuyo, Fac Ciencias Agr, RA-5505 Mendoza, Argentina. CSIC, Estac Expt Zaidin, Granada, Spain. RP Passera, CB, Univ Nacl Cuyo, Fac Ciencias Agr, Almirante Brown 500, RA-5505 Mendoza, Argentina. EM cpassera@uncu.edu.ar NR 63 TC 0 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1532-4982 J9 ARID LAND RES MANAG JI Arid Land Res. Manag. PY 2007 VL 21 IS 2 BP 91 EP 105 DI 10.1080/15324980701236325 PG 15 SC Environmental Sciences; Soil Science GA 148WL UT ISI:000245108000001 ER PT J AU Sepulveda, E Perez-Mendoza, D Munoz, S Ramirez-Romero, MA Soto, MJ Cervantes, L Herrera-Cervera, JA Lopez-Lara, IS Geiger, O Sanuan, J Brom, S Romero, D AF Sepulveda, Edgardo Perez-Mendoza, Daniel Munoz, Socorro Ramirez-Romero, Miguel A. Soto, Maria Jose Cervantes, Laura Herrera-Cervera, Jose A. Lopez-Lara, Isabel Sabel Geiger, Otto Sanuan, Juan Brom, Susana Romero, David TI Regulation of conjugal transfer of the Rhizobium etli Sym plasmid. SO PLASMID LA English DT Meeting Abstract C1 Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Cuernavaca 62191, Morelos, Mexico. CSIC, Estacion Experimental Zaidin, Granada, Spain. Univ Granada, Granada, Spain. NR 1 TC 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0147-619X J9 PLASMID JI Plasmid PD MAR PY 2007 VL 57 IS 2 BP 220 EP 221 PG 2 SC Genetics & Heredity GA 152PM UT ISI:000245374100095 ER PT J AU Flores, N Cabrera, G Jimenez, IA Pinero, J Gimenez, A Bourdy, G Cortes-Selva, F Bazzocchi, IL AF Flores, Ninoska Cabrera, Gabriela Jimenez, Ignacio A. Pinero, Jose Gimenez, Alberto Bourdy, Genevieve Cortes-Selva, Fernando Bazzocchi, Isabel L. TI Leishmanicidal constituents from the leaves of Piper rusbyi SO PLANTA MEDICA LA English DT Article DE piperaceae; Piper rusbyi; kavapyrones; chalcones; Leishmania; reversal of multidrug-resistance activities ID MULTIDRUG-RESISTANCE PHENOTYPE; GLYCOPROTEIN-LIKE TRANSPORTER; ABSOLUTE-CONFIGURATION; CHALCONES; DIHYDROCHALCONES; SESQUITERPENES AB The kavapyrone (+)-(7R,8S)-epoxy-5,6-didehydrokavain (1) and the chalcone flavokavain B (2) were isolated from Piper rusbyi as the bioactive components by bioassay-guided fractionation, using an in vitro assay against promastigote forms of three Leishmania strains. In addition, the new kavapyrone, (7R,8R/7S,8S)-dihydroxy-5,6-didehydrokavain (3), which is very likely an artifact, and four known compounds (4-7) were isolated. Their structures were elucidated on the basis of spectral analysis, and the absolute configurations of compounds 1 and 3 were established by CD studies and the modified Mosher ester procedure, respectively. All compounds were evaluated for in vitro leishmanicidal activity. The most active compounds 1 (IC50 = 81.9 mu M) and 2 (IC50 = 11.2 mu M) were also evaluated in vivo against a New World strain of cutaneous leishmaniasis, and the results showed the efficacy of 2 at a dose of 5 mg/kg/day. Compounds 1 and 3 were also assayed as reversal agents against a multidrug-resistant Leishmania tropica line, but were found to be inactive. C1 Univ La Laguna, Inst Univ Bioorgan Antonio Gonzalez, Isabel Lopez Bazzocchi, E-38206 Tenerife, Spain. Univ Mayor San Andres, Fac Ciencias Farmaceut & Bioquim, Inst Invest Farmaco Bioquim, La Paz, Bolivia. Univ La Laguna, Inst Univ Enfermedades Trop & Salud Publ Canarias, E-38206 Tenerife, Spain. CSIC, Inst Parasitol & Biomed Lopez Neyra, Armilla, Granada, Spain. RP Bazzocchi, IL, Univ La Laguna, Inst Univ Bioorgan Antonio Gonzalez, Isabel Lopez Bazzocchi, Ave Astrofis Francisco Sanchez 2, E-38206 Tenerife, Spain. EM ilopez@ull.es NR 25 TC 0 PU GEORG THIEME VERLAG KG PI STUTTGART PA RUDIGERSTR 14, D-70469 STUTTGART, GERMANY SN 0032-0943 J9 PLANTA MED JI Planta Med. PD MAR PY 2007 VL 73 IS 3 BP 206 EP 211 DI 10.1055/s-2007-967123 PG 6 SC Plant Sciences; Chemistry, Medicinal; Pharmacology & Pharmacy GA 155OY UT ISI:000245588700003 ER PT J AU Rueda, B Linga Reddy, MV Gonzalez-Gay, MA Balsa, A Pascual-Salcedo, D Petersson, IF Eimon, A Paira, S Scherbarth, HR Pons-Estel, BA Gonzalez-Escribano, MF Alarcon-Riquelme, ME Martin, J AF Rueda, B. Linga Reddy, M. V. Gonzalez-Gay, M. A. Balsa, A. Pascual-Salcedo, D. Petersson, I. F. Eimon, A. Paira, S. Scherbarth, H. R. Pons-Estel, B. A. Gonzalez-Escribano, M. F. Alarcon-Riquelme, M. E. Martin, J. TI Analysis of interferon regulatory factor 5 (IRF5) gene functional polymorphisms in rheumatoid arthritis SO TISSUE ANTIGENS LA English DT Meeting Abstract C1 IPB Lopez Neyra, CSIC, Dept Biol Celular & Inmunol, Granada, Spain. Univ Uppsala, Dept Genet & Pathol, Uppsala, Sweden. Hosp Xeral Calde, Serv Reumatol, Lugo, Spain. Hosp Univ La Paz, Serv Reumatol, Madrid, Spain. Hosp Univ La Paz, Serv Inmunol, Madrid, Spain. Spenshult Hosp Rheumat Dis, Halmstad, Sweden. Ctr Educ Med & Investigac Clin, Buenos Aires, DF, Argentina. Hosp Jose M Cullen, Santa Fe, NM USA. Hosp Interzonal Gen Agudos Dr Oscar Alende, Mar Del Plata, Argentina. Sanatorio Parque, Rosario, Argentina. Hosp Virgen Rocio, Serv Inmunol, Seville, Spain. NR 0 TC 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0001-2815 J9 TISSUE ANTIGEN JI Tissue Antigens PD MAY PY 2007 VL 69 IS 5 BP 471 EP 471 PG 1 SC Cell Biology; Immunology; Pathology GA 160ZV UT ISI:000245985000256 ER PT J AU Bernal, P Munoz-Rojas, J Hurtado, A Ramos, JL Segura, A AF Bernal, Patricia Munoz-Rojas, Jesus Hurtado, Ana Ramos, Juan L. Segura, Ana TI A Pseudomonas putida cardiolipin synthesis mutant exhibits increased sensitivity to drugs related to transport functionality SO ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID UNSATURATED FATTY-ACIDS; ESCHERICHIA-COLI; MULTIDRUG EFFLUX; PHOSPHOLIPID-COMPOSITION; CIS/TRANS ISOMERIZATION; AROMATIC-HYDROCARBONS; RESPIRATORY-CHAIN; CRYSTAL-STRUCTURE; ACRIDINE-ORANGE; IN-VITRO AB Biological membranes have evolved different mechanisms to modify their composition in response to chemical stimuli in a process called 'homeoviscous adaptation'. Among these mechanisms, modifications in the ratio of saturated/unsaturated fatty acids and in cis/trans fatty acid isomers, cyclopropanation and changes in the phospholipids head group composition have been observed. To further understand the role of phospholipid head groups in solvent stress adaptation, we knocked out the cls (cardiolipin synthase) gene in Pseudomonas putida DOT-T1E. As expected, cis mutant membranes contained less cardiolipin than those of the wild-type strain. Although no significant growth rate defect was observed in the cis mutant compared with the wild-type strain, mutant cells were significantly smaller than the wild-type cells. The cls mutant was more sensitive to toluene shocks and to several antibiotics than the parental strain, suggesting either that the RND efflux pumps involved in the extrusion of these drugs were not working efficiently or that membrane permeability was altered in the mutant. Membranes of the cis mutant strain seemed to be more rigid than those of the parental strain, as observed by measurements of fluorescence polarization using the DPH probe, which intercalates into the membranes. Ethidium bromide is pumped out in Pseudomonas putida by at least one RND efflux pump involved in antibiotic and solvent resistance, and the higher rate of accumulation of ethidium bromide inside mutant cells indicated that functioning of the efflux pumps was compromised as a consequence of the alteration in phospholipid head group composition. C1 CSIC, Estac Expt Zaidin, Dept Environm Protect, E-18008 Granada, Spain. CICM, ICUAP, BUAP, Puebla, Mexico. RP Ramos, JL, CSIC, Estac Expt Zaidin, Dept Environm Protect, Prof Albareda 1, E-18008 Granada, Spain. EM jlramos@eez.csic.es NR 57 TC 2 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1462-2912 J9 ENVIRON MICROBIOL JI Environ. Microbiol. PD MAY PY 2007 VL 9 IS 5 BP 1135 EP 1145 DI 10.1111/j.1462-2920.2006.01236.x PG 11 SC Microbiology GA 161LI UT ISI:000246016000004 ER PT J AU Rosso, S Zanetti, R Sanchez, MJ Nieto, A Miranda, A Mercier, M Loria, D Osterlind, A Greinert, R Chirlaque, MD Fabbrocini, G Barbera, C Sancho-Garnier, H Lauria, C Balzi, D Zoccola, M AF Rosso, Stefano Zanetti, Roberto Sanchez, Maria Jose Nieto, Adoracion Miranda, Ana Mercier, Mariette Loria, Dora Osterlind, Anne Greinert, Ruediger Chirlaque, Maria-Dolores Fabbrocini, Gabriella Barbera, Cesare Sancho-Garnier, Helene Lauria, Carmela Balzi, Daniela Zoccola, Marina CA Helios Working Group TI Is 2,3,5-pyrroletricarboxylic acid in hair a better risk indicator for melanoma than traditional epidemiologic measures for skin phenotype? SO AMERICAN JOURNAL OF EPIDEMIOLOGY LA English DT Article DE melanins; melanoma; skin neoplasms; spectroscopy; near-infrared ID CUTANEOUS MELANOMA; SUN EXPOSURE; PHEOMELANIN; EUMELANIN; DEGRADATION; MICROANALYSIS; PIGMENTATION; METAANALYSIS; CARCINOMA; MELANINS AB This study aims to assess type of melanin as a risk indicator for skin tumors, in a sample of melanoma cases and controls within a larger multicenter study (Helios 2), held in Europe and South America in 2001-2002. In each case and control, the melanin content in hair was assessed by three methods: 1) the amount of 2,3,5-pyrroletricarboxylic acid (PTCA); 2) the absorbance ratio with ultraviolet spectroscopy; and 3) the spectra of near-infrared spectroscopy. Statistical analysis was performed in a Bayesian setting, defining priors for confounders and effect modifiers from the larger study data set. Subjects with values of PTCA of less than 85 ng/mg carried an increased risk (26 vs. seven discordant pairs: odds ratio = 4.4, 95% confidence interval: 1.52, 14.54), adjusted by hair color, eye color, and number of nevi (n = >= 40). The absorbance ratio showed a weaker and nonsignificant odds ratio of 1.5. After correction by misclassification, near-infrared spectroscopy was associated with an odds ratio of 2.3 (95% confidence interval: 1.36, 4.22). The amount of PTCA is thus a strong and independent risk indicator for melanoma. Incorporating PTCA determination into epidemiologic studies is therefore recommended. C1 Piedmont Canc Registry, Oncol Prevent Ctr, I-10123 Turin, Italy. Andalusian Sch Publ Hlth, Granada Canc Registry, Granada, Spain. Univ Seville, Fac Med, Dept Prevent Med & Publ Hlth, E-41009 Seville, Spain. So Portugal Reg Inst Oncol, Reg Canc Registry, Lisbon, Portugal. Univ Besancon, Fac Med & Pharm, Doubs Canc Registry, F-25030 Besancon, France. Univ Buenos Aires, AH Roffo Inst Oncol, RA-1053 Buenos Aires, DF, Argentina. Hillerod Hosp, Dermatol Clin, Hillerod, Denmark. Buxtehude Hosp, Dermatol Ctr, Buxtehude, Germany. Murcia Hlth Council, Dept Epidemiol, Murcia, Spain. Univ Naples Federico II, Dept Dermatol, Naples, Italy. Infermi Hosp, Dept Dermatol, Biella, Italy. Ctr Epidaure, Herault Canc Registry, Montpellier, France. Italian League Against Canc, Ragusa Sect, Ragusa, Italy. Reg Agcy Publ Hlth Tuscany, Florence, Italy. CNR, Inst Macromol Studies, Biella, Italy. RP Rosso, S, Piedmont Canc Registry, Oncol Prevent Ctr, Via San Francesco Paola 31, I-10123 Turin, Italy. EM stefano.rosso@cpo.it NR 27 TC 1 PU OXFORD UNIV PRESS INC PI CARY PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA SN 0002-9262 J9 AMER J EPIDEMIOL JI Am. J. Epidemiol. PD MAY 15 PY 2007 VL 165 IS 10 BP 1170 EP 1177 DI 10.1093/aje/kwm018 PG 8 SC Public, Environmental & Occupational Health GA 162WK UT ISI:000246120000010 ER PT J AU Bashan, Y Khaosaad, T Salazar, BG Ocampo, JA Wiemken, A Oehl, F Vierheilig, H AF Bashan, Y. Khaosaad, T. Salazar, B. G. Ocampo, J. A. Wiemken, A. Oehl, F. Vierheilig, Horst TI Mycorrhizal characterization of the boojum tree, Fouquieria columnaris, an endemic ancient tree from the Baja California Peninsula, Mexico SO TREES-STRUCTURE AND FUNCTION LA English DT Article DE arbuscular mycorrhizal fungi; Baja California Peninsula; boojum tree; Fouquieria columnaris ID ARBUSCULAR MYCORRHIZAE; SONORAN DESERT; FUNGI; DIVERSITY; NAMIBIA; PLANTS; AGROECOSYSTEMS; ESTABLISHMENT; COLONIZATION; ARCHAEOSPORA AB The mycorrhizal association with the boojum tree, Fouquieria columnaris (=Idria columnaris), was studied. This unusual tree is almost exclusively endemic to granite and volcanic soils in highly arid areas of the Baja California Peninsula of Mexico. Soil and root samples from ten sites, covering the extent of geographic distribution of the tree on the peninsula, were analyzed. The roots of the boojum tree contained all structures of an arbuscular mycorrhizal (AM) association. Morphologically different species, 23 in number, were identified in close vicinity to the boojum tree indicating that F. columnaris is associated with a high number of AM species of several AM genera and families. C1 Agr Univ Vienna, Inst Pflanzenschutz, Dept Angew Pflanzenwissensch & Pflanzenbiotechnol, A-1190 Vienna, Austria. NW Ctr Biol Res CIBNOR, Environm Microbiol Grp, La Paz 23090, Mexico. CSIC, Estac Expt Zaidin, Dept Microbiol, E-18008 Granada, Spain. Univ Basel, Inst Bot, Zurich Basel Plant Sci Ctr, CH-4056 Basel, Switzerland. RP Vierheilig, H, Agr Univ Vienna, Inst Pflanzenschutz, Dept Angew Pflanzenwissensch & Pflanzenbiotechnol, Peter Jordan Str 82, A-1190 Vienna, Austria. EM horst.vierheilig@boku.ac.at NR 35 TC 2 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0931-1890 J9 TREES-STRUCT FUNCT JI Trees-Struct. Funct. PD MAY PY 2007 VL 21 IS 3 BP 329 EP 335 DI 10.1007/s00468-007-0126-2 PG 7 SC Forestry GA 164AY UT ISI:000246206200007 ER PT J AU Arriagada, CA Herrera, MA Borie, F Ocampo, JA AF Arriagada, C. A. Herrera, M. A. Borie, F. Ocampo, J. A. TI Contribution of arbuscular mycorrhizal and saprobe fungi to the aluminum resistance of Eucalyptus globulus SO WATER AIR AND SOIL POLLUTION LA English DT Article DE Eucalyptus; aluminum tolerance; acid soils; symbiosis; phytotoxic; phytoremediation ID HEAVY-METAL UPTAKE; ANDROPOGON-VIRGINICUS L.; MINERAL ACQUISITION; PHOSPHORUS UPTAKE; ORGANIC-ACIDS; PLANT-GROWTH; SOIL; TOLERANCE; TOXICITY; ROOTS AB Aluminum in acidic conditions is toxic to plants. Aluminum tolerance in some plant species has been ascribed to arbuscular mycorrhizal fungal symbiosis. In this study, the application of aluminum was found to inhibit mycelia development of saprobe fungi Fusarium concolor and Trichoderma koningii and the hyphal length of the arbuscular mycorrhizal fungi Glomus mosseae and Glomus deserticola in vitro. Several levels of aluminum were applied to Eucalyptus globulus plants and inoculated with arbuscular mycorrhizal fungi alone or together with both saprobe fungi. The application of 1,500 mg kg(-1) decreased the shoot and root dry weight, chlorophyll content and total P, Mg, and Ca concentrations in the shoot of E. globulus. However, both mycorrhizal fungi G. mosseae and G. deserticola inoculated alone increased the shoot dry weight of Eucalyptus, compared with a non- arbuscular mycorrhizal inoculated control treated with 1,500 mg kg(-1) of aluminum. When 1,500 mg kg(-1) of aluminum was applied, T. koningii increased the effect of G. deserticola on the shoot weight of eucalyptus, whereas with 3,000 mg kg(-1), shoot weight and arbuscular mycorrhizal colonization decreased in all treatments. With 1,500 mg kg(-1), the highest accumulation of aluminum in the shoot was obtained when G. deserticola was inoculated together with T. koningii. The possibility of manipulating an arbuscular mycorrhizal inoculation together with a saprobe fungus confers a high aluminum resistance in E. globulus. The effect of such combined inoculation is particularly important in some Chilean volcanic acid soils, mainly those which have been intensively cropped and are without lime addition, which facilitates the increase of phytotoxic aluminum species and limits their agricultural use. Therefore, such dual inoculation in field conditions deserves further investigation. Overall, the arbuscular mycorrhizal and saprobe fungi contribute to the increase in resistance of E. globulus to aluminium. C1 Univ La Frontera, Dept Ciencias Forestales, Fac Ciencias Agropecuarias & Forestales, Temuco 01145, Chile. Univ Cordoba, Dept Ingn Forestal, Escuela Tecn Super Ingenieros Agron & Montes, E-14080 Cordoba, Spain. Estac Expt Zaidin, Granada 18008, Spain. RP Arriagada, CA, Univ La Frontera, Dept Ciencias Forestales, Fac Ciencias Agropecuarias & Forestales, Av Francisco Salazar, Temuco 01145, Chile. EM carriaga@ufro.cl NR 77 TC 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0049-6979 J9 WATER AIR SOIL POLLUT JI Water Air Soil Pollut. PD JUN PY 2007 VL 182 IS 1-4 BP 383 EP 394 DI 10.1007/s11270-007-9349-5 PG 12 SC Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources GA 166EJ UT ISI:000246360400032 ER PT J AU Apellaniz, JM Walborn, NR Morrell, NI Niemela, VS Nelan, EP AF Apellaniz, J. Maiz Walborn, Nolan R. Morrell, N. I. Niemela, V. S. Nelan, E. P. TI Pismis 24-1: The stellar upper mass limit preserved SO ASTROPHYSICAL JOURNAL LA English DT Article DE binaries : close; stars : early type; stars : fundamental parameters; stars : individual ( Pismis 24-17, Pismis 24-1NW, Pismis 24-1SE) ID LARGE-MAGELLANIC-CLOUD; O-STARS; SPECTRAL CLASSIFICATION; SYSTEMS; CALIBRATION; PARAMETERS; NGC-6357; NEBULA AB Is there a stellar upper mass limit? Recent statistical work seems to indicate that there is and that it is in the vicinity of 150M circle dot. In this paper we use HST and ground- based data to investigate the brightest members of the cluster Pismis 24, one of which ( Pismis 24-1) was previously inferred to have a mass greater than 200M circle dot, in apparent disagreement with that limit. We determine that Pismis 24-1 is composed of at least three objects, the resolved Pismis 24-1SW and the unresolved spectroscopic binary Pismis 24-1NE. The evolutionary zero-age masses of Pismis 24-1SW, the unresolved system Pismis 24-1NE, and the nearby star Pismis 24-17 are all approximate to 100 M circle dot, very large but under the stellar upper mass limit. C1 CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Observ Carnegie Inst Washington, Las Campanas Observ, La Serena, Chile. Univ Nacl La Plata, Fac Ciencias Astron & Geofis, RA-1900 La Plata, Argentina. RP Apellaniz, JM, CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. EM jmaiz@iaa.es NR 30 TC 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2007 VL 660 IS 2 PN Part 1 BP 1480 EP 1485 PG 6 SC Astronomy & Astrophysics GA 169CW UT ISI:000246571300052 ER PT J AU Pereira, CB Miranda, LF AF Pereira, C. B. Miranda, L. F. TI Identification of PNG232.0+05.7 as a new halo planetary nebula and of IRAS 19336-0400 as a new type III planetary nebula SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE planetary nebulae : individual : PNG232.0+05.7; planetary nebulae : individual : IRAS 19336+0400 ID ALPHA EMISSION STARS; POST-AGB STAR; CANDIDATES; ABUNDANCES; CHLORINE; SULFUR; ARGON AB Aims. We determined the nature and Peimbert type of two low-excitation planetary nebulae, PNG 232.0+05.7 and IRAS 19336-0400. Methods. We used low resolution optical spectroscopy in the range 3200-9000 angstrom. Results. We derived line intensities, reddening, physical conditions ( electron density and temperature) and ionic and elemental abundances. Based on the abundance analysis and its radial velocity we conclude that PNG 232.0+05.7 is a halo planetary nebulae. This discovery thus adds this object to the sample of ten known halo planetary nebulae. IRAS 19336-0400 is probably a type III planetary nebulae, as strongly suggested by its abundances and high radial velocity, although this conclusion awaits a better estimation of its distance. C1 Observ Nacl MCT, BR-20921400 Rio De Janeiro, RJ, Brazil. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Pereira, CB, Observ Nacl MCT, Rua Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil. EM claudio@on.br lfm@iaa.es NR 28 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2007 VL 467 IS 3 BP 1249 EP 1252 DI 10.1051/0004-6361:20077154 PG 4 SC Astronomy & Astrophysics GA 169RV UT ISI:000246610300035 ER PT J AU Benaglia, P Vink, JS Marti, J Apellaniz, JM Koribalski, B Crowther, PA AF Benaglia, P. Vink, J. S. Marti, J. Apellaniz, J. Maiz Koribalski, B. Crowther, P. A. TI Testing the predicted mass-loss bi-stability jump at radio wavelengths SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE radio continuum : stars; stars : early-type; stars : mass-loss; stars : winds, outflows ID EARLY-TYPE STARS; RADIATION-DRIVEN WINDS; LUMINOUS BLUE VARIABLES; LOW METALLICITY ENVIRONMENT; SOUTHERN OB STARS; STELLAR WINDS; WOLF-RAYET; SPECTRAL CLASSIFICATIONS; CONTINUUM MEASUREMENTS; TERMINAL VELOCITIES AB Context. Massive stars play a dominant role in the Universe, but one of the main drivers for their evolution, their mass loss, remains poorly understood. Aims. In this study, we test the theoretically predicted mass-loss behaviour as a function of stellar effective temperature across the so-called "bi-stability" jump. Methods. We observe OB supergiants in the spectral range O8-B3 at radio wavelengths to measure their thermal radio flux densities, and complement these measurements with data from the literature. We derive the radio mass-loss rates and wind efficiencies, and compare our results with H alpha mass-loss rates and predictions based on radiation-driven wind models. Results. The wind efficiency shows the possible presence of a local maximum around an effective temperature of 21 000 K - in qualitative agreement with predictions. Furthermore, we find that the absolute values of the radio mass-loss rates show good agreement with empirical H alpha rates derived assuming homogeneous winds - for the spectral range under consideration. However, the empirical mass-loss rates are larger ( by a factor of a few) than the predicted rates from radiation-driven wind theory for objects above the bi-stability jump ( BSJ) temperature, whilst they are smaller ( by a factor of a few) for stars below the BSJ temperature. The reason for these discrepancies remains as yet unresolved. A new wind momenta-luminosity relation ( WLR) for O8-B0 stars has been derived using the radio observations. The validity of the WLR as a function of the fitting parameter related to the force multiplier alpha(eff) ( Kudritzki & Puls 2000) is discussed. Conclusions. Our most interesting finding is that the qualitative behaviour of the empirical wind efficiencies with effective temperature is in line with the predicted behaviour, and this presents the first hint of empirical evidence for the predicted mass-loss bi-stability jump. However, a larger sample of stars around the BSJ needs to be observed to confirm this finding. C1 Inst Argentino Radioastron, RA-1894 Villa Elisa, Argentina. UNLP, Fac Cs Astron & Geofis, RA-1900 La Plata, Argentina. Univ Keele, Lennard Jones Lab, Keele ST5 5BG, Staffs, England. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England. Univ Jaen, Dept Fis, EPS, Jaen 23071, Spain. Inst Astrofis Andalucia, Granada 18008, Spain. CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia. Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England. RP Benaglia, P, Inst Argentino Radioastron, CC5, RA-1894 Villa Elisa, Argentina. EM pbenaglia@fcaglp.unlp.edu.ar jsv@astro.keele.ac.uk jmarti@ujaen.es jmaiz@iaa.es Baerbel.Koribalski@csiro.au Paul.Crowther@sheffield.ac.uk NR 80 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2007 VL 467 IS 3 BP 1265 EP 1274 DI 10.1051/0004-6361:20077139 PG 10 SC Astronomy & Astrophysics GA 169RV UT ISI:000246610300037 ER PT J AU Arriagada, CA Herrera, MA Ocampo, JA AF Arriagada, Cesar A. Herrera, Miguel A. Ocampo, Juan A. TI Beneficial effect of saprobe and arbuscular mycorrhizal fungi on growth of Eucalyptus globulus co-cultured with Glycine max in soil contaminated with heavy metals SO JOURNAL OF ENVIRONMENTAL MANAGEMENT LA English DT Article DE eucalyptus; contamination; heavy metals; arbuscular mycorrhiza; saprobe fungi; cadmium; lead; tolerance ID GLOMUS-MOSSEAE; TOLERANCE; INFECTION; PLANTS; ROOTS; COLONIZATION; CHLOROPHYLL; MINE; PB; CD AB The effects of saprobe and arbuscular mycorrhizal (AM) fungi on growth, chlorophyll and N, P and K content of Eucalyptus globulus Labill. growing in soil contaminated by heavy metals in the presence or absence of Glycine max were investigated. Glomus mosseae and Glomus deserticola increased dry weight, shoot length, total N, P and K concentration and the quantity of chlorophyll in E. globulus shoots. The protection of Eucalyptus by AM fungi against the action of the heavy metals was more evident when this plant grew as an intercrop with soybean than as a monoculture. The presence of the saprobe fungi Fusarium concolor and Trichoderma koningii further enhanced shoot dry weight, N, P and K content of AM Eucalyptus. The co-inoculation of Eucalyptus with Glomus deserticola and T koningii was more effective for Cd uptake. In addition, Glomus deserticola enhanced the amount of Ph absorbed by Eucalyptus plants. We showed that it is important to select the most efficient AM and saprobe fungi to stimulate plant growth in heavy-metal-contaminated soil and that the combination of both plays an important role in metal tolerance of Eucalyptus plants. (C0 2006 Elsevier Ltd. All rights reserved. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain. Univ Cordoba, Escuela Tecn Super Ingn Agron & Montes, Dept Ingn Forestal, E-14080 Cordoba, Spain. Univ La Frontera, Fac Ciencias Agropecuarias & Forestales, Dept Ciencias Forestales, Temuco, Chile. RP Ocampo, JA, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Profesor Albareda 1, E-18008 Granada, Spain. EM carriaga@ufro.cl jocampo@eez.csic.es NR 42 TC 1 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0301-4797 J9 J ENVIRON MANAGE JI J. Environ. Manage. PD JUL PY 2007 VL 84 IS 1 BP 93 EP 99 DI 10.1016/j.jenvman.2006.05.005 PG 7 SC Environmental Sciences; Environmental Studies GA 173YQ UT ISI:000246908800010 ER PT J AU Oyonarte, C Mingorance, MD Durante, P Pinero, G Barahona, E AF Oyonarte, Ceellio Mingorance, Maria Dolores Durante, Pilar Pinero, Gervasio Barahona, Enrique TI Indicators of change in the organic matter in arid soils SO SCIENCE OF THE TOTAL ENVIRONMENT LA English DT Article DE degradation; global change; vegetation; land use; monitoring programmes ID CARBON FRACTIONS; MANAGEMENT; QUALITY AB Soil organic matter is a key component in ecosystems, as it is the essential part of a set of relevant processes and constitutes an important carbon pool contributing to Global Change. The design of environmental monitoring programmes should include indicators of the current status of ecosystems, alerting to incipient changes in them. In this context, a sampling scheme has been designed taking into account the main processes and soil uses affecting the dynamics of soil organic matter. Well-tested parameters were determined in order to assess which of them are most useful as indicators of soil organic matter evolution in and soil, such as that in the "Cabo de Gata-Nijar" Natural Park (SE Spain). The parameters characterising the lability of the different fractions indicate changes in soil organic matter triggered by changes in soil use and soil dynamics. Changes in soil use, when drastic, are best reflected by those fractions comprising a high percentage of the total soil carbon, while the processes having slower dynamics are best demonstrated by the labile fractions. As a result of the sensitivity analysis of parameters versus changes, and taking into account the operational difficulties for determining them, the following indicators are proposed for a monitoring programme: total organic carbon, active fraction of the organic carbon and ratios of this fraction versus total organic carbon (%) (as given by the lability index proposed). (C) 2007 Elsevier B.V. All rights reserved. C1 Univ Almeria, Dept Soil Sci, Almeria 04120, Spain. CSIC, Earth Sci & Environm Chem, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Buenos Aires, CONICET, IFEVA, Fac Agron, Buenos Aires, DF, Argentina. RP Oyonarte, C, Univ Almeria, Dept Soil Sci, Almeria 04120, Spain. EM coyonart@ual.es NR 10 TC 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0048-9697 J9 SCI TOTAL ENVIR JI Sci. Total Environ. PD MAY 25 PY 2007 VL 378 IS 1-2 BP 133 EP 137 DI 10.1016/j.sciotenv.2007.01.039 PG 5 SC Environmental Sciences GA 174NM UT ISI:000246949000027 ER PT J AU Anglada, G Lopez, R Estalella, R Masegosa, J Riera, A Raga, AC AF Anglada, Guillem Lopez, Rosario Estalella, Robert Masegosa, Josefa Riera, Angels Raga, Alejandro C. TI Proper motions of the jets in the region of HH 30 and HL/XZ Tau: Evidence for a binary exciting source of the HH 30 jet SO ASTRONOMICAL JOURNAL LA English DT Article DE ISM : Herbig-Haro objects; ISM : individual (HH 30, HH 266); ISM : jets and outflows; stars : formation; stars : individual (HL Tauri, XZ Tauri) ID AURIGA MOLECULAR CLOUD; HL TAURI; CIRCUMSTELLAR DISK; HIGH-RESOLUTION; HH 30; YOUNG STARS; LONG-SLIT; OUTFLOWS; SPECTROSCOPY; KINEMATICS AB We present [ S II] images of the HH 30 and HL/XZ Tau region obtained at two epochs, as well as long-slit optical spectroscopy of the HH 30 jet. We measured proper motions of similar to 100-300 km s(-1) for the HH 30 jet and counterjet and of similar to 120 km s(-1) for the HL Tau jet. Inclination angles with respect to the plane of the sky are 0 degrees - 40 degrees for the HH 30 jet and 60 degrees for the HL Tau jet. Comparison with previous observations suggests that most of the jet knots consist of persistent structures. Also, we corroborate that the HH 30-N knots correspond to the head of the HH 30 jet. The overall HH 30 jet structure can be well described by a wiggling ballistic jet, arising either from orbital motion of the jet source around a primary or from precession of the jet axis because of the tidal effects of a companion. In the first scenario, the orbital period would be 53 yr and the total mass 0.25-2 M-circle dot. In the precession scenario, the mass of the jet source would be similar to 0.1-1 M-circle dot, the orbital period < 1 yr, and the mass of the companion less than a few times 0.01 M-circle dot, thus being a substellar object or a giant exoplanet. In both scenarios a binary system with a separation < 18 AU(< 0.13") is required. Since the radius of the flared disk observed with the HST is similar to 250 AU, we conclude that this disk appears to be circumbinary rather than circumstellar, suggesting that the search for the collimating agent of the HH 30 jet should be carried out at much smaller scales. C1 CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain. Univ Politecn Catalunya, Dept Fis & Engn Nucl, Vilanova I La Geltru, Spain. Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. RP Anglada, G, CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. EM guillem@iaa.es rosario.lopez@am.ub.es robert.estalella@am.ub.es pepa@iaa.es angels.riera@upc.es raga@nucleares.unam.mx NR 47 TC 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD JUN PY 2007 VL 133 IS 6 BP 2799 EP 2814 PG 16 SC Astronomy & Astrophysics GA 175BO UT ISI:000246987400031 ER PT J AU Sealey-Cardona, M Cammerer, S Jones, S Ruiz-Perez, LM Brun, R Gilbert, IH Urbina, JA Gonzalez-Pacanowska, D AF Sealey-Cardona, Marco Cammerer, Simon Jones, Simon Ruiz-Perez, Luis M. Brun, Reto Gilbert, Ian H. Urbina, Julio A. Gonzalez-Pacanowska, Dolores TI Kinetic characterization of squalene synthase from Trypanosoma cruzi: Selective inhibition by quinuclidine derivatives SO ANTIMICROBIAL AGENTS AND CHEMOTHERAPY LA English DT Article ID CHAGAS-DISEASE; MOLECULAR-CLONING; IN-VITRO; EXPRESSION; SYNTHETASE; PURIFICATION; YEAST; CDNA; GENE; BIOSYNTHESIS AB The biosynthesis of sterols is a major route for the development of antitrypanosomals. Squalene synthase (SQS) catalyzes the first step committed to the biosynthesis of sterols within the isoprenoid pathway, and several inhibitors of the enzyme have selective antitrypanosomal activity both in vivo and in vitro. The enzyme from Trypanosoma cruzi is a 404-amino-acid protein with a clearly identifiable membrane-spanning region. In an effort to generate soluble recombinant enzyme, we have expressed in Escherichia coli several truncated versions of T. cruzi SQS with a His tag attached to the amino terminus. Deletions of both the amino- and carboxyl-terminal regions generated active and soluble forms of the enzyme. The highest levels of soluble protein were achieved when 24 and 36 amino acids were eliminated from the amino and carboxyl regions, respectively, yielding a protein of 41.67 kDa. The Michaelis-Menten constants of the purified enzyme for farnesyl diphosphate and NAD (NADPH) were 5.25 and 23.34 mu M, respectively, whereas the V-max was 1,428.56 nmol min(-1)mg(-1). Several quinuclidine derivatives with antiprotozoal activity in vitro were found to be selective inhibitors of recombinant T. cruzi SQS in comparative assays with the human enzyme, with 50% inhibitory concentration values in the nanomolar range. These data suggest that selective inhibition of T. cruzi SQS may be an efficient strategy for the development of new antitrypanosomal agents. C1 CSIC, Inst Parasitol & Biomed Lopez Neyra, E-18100 Granada, Spain. Univ Cardiff Wales, Welsh Sch Pharm, Cardiff CF10 3XF, S Glam, Wales. Swiss Trop Inst, CH-4002 Basel, Switzerland. Inst Venezolano Invest Cient, Ctr Bioquim & Biofis, Lab Quim Biol, Caracas 1020A, Venezuela. RP Gonzalez-Pacanowska, D, CSIC, Inst Parasitol & Biomed Lopez Neyra, Avda Conocimiento S-N,Parque Tecnol Ciencias Salu, E-18100 Granada, Spain. EM dgonzalez@ipb.csic.es NR 28 TC 1 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0066-4804 J9 ANTIMICROB AGENTS CHEMOTHER JI Antimicrob. Agents Chemother. PD JUN PY 2007 VL 51 IS 6 BP 2123 EP 2129 DI 10.1128/AAC.01454-06 PG 7 SC Microbiology; Pharmacology & Pharmacy GA 175CY UT ISI:000246991400035 ER PT J AU Gomez, LM Sanchez, E Ruiz-Narvaez, EA Lopez-Nevot, MA Anaya, JM Martin, J AF Gomez, L. M. Sanchez, E. Ruiz-Narvaez, E. A. Lopez-Nevot, M. A. Anaya, J.-M. Martin, J. TI Macrophage migration inhibitory factor gene influences the risk of developing tuberculosis in northwestern Colombian population SO TISSUE ANTIGENS LA English DT Article DE delayed-type hypersensitivity; microsatellite; MIF; polymorphism; single nucleotide; polymorphism; tuberculin skin test; tuberculosis ID FACTOR MIF GENE; RHEUMATOID-ARTHRITIS; SUSCEPTIBILITY; ASSOCIATION; POLYMORPHISMS; DISEASE; REGULATOR; SEVERITY; IMMUNITY; AFRICANS AB Macrophage migration inhibitory factor (MIF) is a pleiotropic cytokine that regulates innate and adaptative immunity responses against pathogens. The MIF gene, at 22q11.2, is polymorphic. Functional promoter variants in the MIF gene influence susceptibility to inflammatory diseases in Caucasians and Africans. An association study was carried out to examine the influence of MIF-173 single nucleotide polymorphism and the MIF-794 microsatellite on the susceptibility to develop human tuberculosis (TB) in a well-defined Latin-American population. To this purpose, 230 northwestern Colombian patients with pulmonary TB, negative for human immunodeficiency virus infection, and 235 matched healthy individuals stratified by the tuberculin skin test were examined. Multivariate analysis showed that MIF-173C allele was associated with disease (odds ratio = 1.64, 95% confidence interval 1.07-2.52) in a dominant pattern. No allele in the MIF-794 CATT microsatellite was associated with risk of TB. These results indicate that MIF gene influences the risk of developing TB in the studied population. C1 CIB, Cellular Biol & Immunogenet Unit, Medellin, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Harvard Sch Publ Hlth, Dept Nutr, Boston, MA USA. Harvard Sch Publ Hlth, Dept Epidemiol, Boston, MA USA. Hosp Virgen Nieves, Serv Inmunol, Granada, Spain. Univ Nacl Rosario, Sch Med, Medellin, Colombia. RP Anaya, JM, CIB, Cellular Biol & Immunogenet Unit, Carrera 72A 78B-141, Medellin, Colombia. EM janaya@cib.org.co NR 34 TC 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0001-2815 J9 TISSUE ANTIGEN JI Tissue Antigens PD JUL PY 2007 VL 70 IS 1 BP 28 EP 33 DI 10.1111/j.1399-0039.2007.00843.x PG 6 SC Cell Biology; Immunology; Pathology GA 177SR UT ISI:000247173300004 ER PT J AU Vaz, LPR Andersen, J Claret, A AF Vaz, L. P. R. Andersen, J. Claret, A. TI Absolute dimensions of eclipsing binaries - XXV. U Ophiuchi and the evolution and composition of 5 M circle dot stars SO ASTRONOMY & ASTROPHYSICS LA English DT Review DE stars : binaries : eclipsing; stars : fundamental parameters; stars : evolution; Galaxy : evolution ID LIMB-DARKENING COEFFICIENTS; MODEL STELLAR ATMOSPHERES; TY CORONAE AUSTRALIS; APSIDAL-MOTION; MAIN-SEQUENCE; RADIATIVE OPACITIES; 4-COLOR PHOTOMETRY; LIGHT CURVES; TRIPLE SYSTEM; SPECTROSCOPIC OBSERVATIONS AB Context. Precise stellar masses and radii provide unique information on stellar evolution. In a Galactic context, they may also provide information on the evolution of the Solar neighbourhood. Aims. We aim to determine absolute dimensions for the mid B-type eclipsing binary U Ophiuchi and compare the inferred ages and chemical compositions to those of other binary stars with masses near 5 M-circle dot. Methods. We determine masses, radii, log g, log T-eff, and luminosities for the stars in U Oph from new radial velocities and uvby light curves. By improving the Wilson-Devinney code, we also derive precise apsidal-motion and light-time orbits of this triple system, using 353 times of minimum over 120 years. Finally, we compare the data for U Oph and three similar systems with the predictions of stellar models. Results. The stars in U Oph have masses of 5.27 +/- 0.09 M-circle dot and 4.74 +/- 0.07 M circle dot, radii of 3.48 +/- 0.02 R-circle dot and 3.11 +/- 0.03 R-circle dot; we argue that systematic errors are negligible. The apsidal motion period is exceptionally short, U similar to 21 yr, while the light-time orbit has P-3 similar to 38.4 yr. The precise log g values for DI Her, UOph, V760 Sco, and MU Cas, all within 10% of 5 M-circle dot, place them successively from the ZAMS to the TAMS, at ages of 5-100 x 10(6) yr. Current stellar evolution models fit both stars in each system very well if the (otherwise unconstrained) metal abundance Z is adjusted in each case. Conclusions. More accurate data and/or binary systems with larger mass ratios are needed to actually test stellar models near 5 M-circle dot. The different Z values found for these young, nearby systems suggest that disk stars form with a range of metal abundances even today, but more data are needed to confirm this result. C1 Univ Fed Minas Gerais, ICEX, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil. Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Noric Opt Telescope Sci Assoc, Santa Cruz de La Palma 38700, Spain. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. RP Vaz, LPR, Univ Fed Minas Gerais, ICEX, Dept Fis, CP 702, BR-30123970 Belo Horizonte, MG, Brazil. EM lpv@fisica.ufmg.br ja@astro.ku.dk claret@iaa.es NR 102 TC 2 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 2007 VL 469 IS 1 BP 285 EP 296 DI 10.1051/0004-6361:20066911 PG 12 SC Astronomy & Astrophysics GA 178ZY UT ISI:000247260300032 ER PT J AU Villar-Martin, M Sanchez, SF Humphrey, A Dijkstra, M Alighieri, SD De Breuck, C Delgado, RG AF Villar-Martin, M. Sanchez, S. F. Humphrey, A. Dijkstra, M. Alighieri, S. di Serego De Breuck, C. Delgado, R. Gonzalez TI VIMOS-VLT spectroscopy of the giant Ly alpha nebulae associated with three z similar to 2.5 radio galaxies SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE galaxies : active; galaxies : high-redshift; galaxies : individual : MRC 1558-003; galaxies : individual : MRC 2025-218; galaxies : individual : MRC 0140-257 ID K-Z DIAGRAM; HIGH-REDSHIFT; MOLONGLO CATALOG; EMISSION-LINES; Z-SIMILAR-TO-2.5; SPECTRUM; FIELD; HALO; KINEMATICS; EVOLUTION AB The morphological and spectroscopic properties of the giant (> 60 kpc) Ly alpha nebulae associated with three radio galaxies at z similar to 2.5 (MRC 1558-003, 2025-218 and 0140-257) have been investigated using integral field spectroscopic data obtained with the Visible Multi-Object Spectrograph (VIMOS) on VLT. The morphologies are varied. The nebula of one source has a centrally peaked, rounded appearance. In the other two objects, it consists of two spatial components. The three nebulae are aligned with the radio axis within less than or similar to 30 degrees. The total Ly alpha luminosities are in the range (0.3-3.4) x 10(44) erg s(-1). The Ly alpha spectral profile shows strong variation through the nebulae, with full width at half-maximum (FWHM) values in the range similar to 400-1500 km s(-1) and velocity shifts V-offset similar to 120-600 km s(-1). We present an infall model that can successfully explain the morphology, size, surface brightness distribution and the velocity field of the Ly alpha nebula associated with MRC 1558-003. It can also explain why Ly alpha is redshifted relative to other emission lines and the FWHM values of the non-resonant He II line. This adds further support to our previous conclusion that the quiescent giant nebulae associated with this and other high-redshift powerful radio galaxies are in infall. A problem for this model is the difficulty to reproduce the large Ly alpha FWHM values, which might be the consequence of a different mechanism. We have discovered a giant (similar to 85 kpc) Ly alpha nebula associated with the radio galaxy MRC 0140-257 at z = 2.64. It shows strikingly relaxed kinematics (FWHM < 300 km s(-1) and V-offset less than or similar to 120 km s(-1)), unique among high-z (greater than or similar to 2) radio galaxies. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. CSIC, MPIA, Ctr Astron Hispano Aleman Calar Alto, E-4004 Almeria, Spain. UNAM, Inst Astron, Mexico City 04510, DF, Mexico. Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia. Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy. European So Observ, D-85748 Garching, Germany. RP Villar-Martin, M, CSIC, Inst Astrofis Andalucia, Aptdo 3004, E-18080 Granada, Spain. EM montse@iaa.es NR 51 TC 2 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUN 21 PY 2007 VL 378 IS 2 BP 416 EP 428 DI 10.1111/j.1365-2966.2007.11811.x PG 13 SC Astronomy & Astrophysics GA 179AV UT ISI:000247262600003 ER PT J AU Munoz, JB Lacasana, M Cavazos, RG Borja-Aburto, VH Galaviz-Hernandez, C Garduno, CA AF Munoz, Julia Blanco Lacasana, Marina Cavazos, Ricardo Garcia Borja-Aburto, Victor Hugo Galaviz-Hernandez, Carlos Garduno, Clemente Aguilar TI Methylenetetrahydrofolate reductase gene polymorphisms and the risk of anencephaly in Mexico SO MOLECULAR HUMAN REPRODUCTION LA English DT Article DE anencephaly; Mexico; MTHFR polymorphisms ID NEURAL-TUBE DEFECTS; COMMON MUTATION; THERMOLABILE VARIANT; C677T POLYMORPHISM; SPINA-BIFIDA; MTHFR; POPULATION; SUPPLEMENTATION; HOMOCYSTEINE; METABOLISM AB The precise etiology of neural tube defects (NTDs) is not known. There is some evidence that mutations in MTHFR gene provide susceptibility to NTDs in some populations; however, other studies have not found this association. One of the problems with previous studies is that they treat NTDs as a homogeneous group, when specific defects could have different etiologies. We conducted a case-control study specifically for anencephaly, based on the Mexican Epidemiological Surveillance System of Neural Tube Defects to evaluate its association with maternal MTHFR 677C > T and 1298A > C polymorphisms, in three states with high frequencies of NTDs: Puebla, Estado de Mexico and Guerrero. We interviewed and collected blood samples from 118 case mothers and 112 control mothers. The questionnaire included information on their reproductive history, socioeconomic characteristics, prenatal care, tobacco and alcohol use, presence of chronic diseases, acute illnesses and fever, consumption of multivitamins and drugs during the periconceptional period. After adjusting for potential confounders, the risk from the mutated homozygous mothers (677TT genotype) was significantly higher than that from mothers with 677CC genotype (OR 3.16, 95 % C1 1.29-7.73); in the case of the heterozygous mothers, an increased risk of anencephaly was observed, even though this was not statistically significant (OR 1.8195% C1 0.78-4.25). The association found between maternal 677TT genotype and anencephaly and the elevated presence of the 677T allele among Mexican women of fertile age urges intensifying folic acid supplementation which has proved to modify this genetic risk in other populations C1 Natl Inst Publ Hlth, Dept Environm Hlth, Cuernavaca 62508, Morelos, Mexico. Andalusian Sch Publ Hlth, Granada 18080, Spain. Natl Inst Perinatol, Dept Training & Med Educ Dirrecc Ensenanza, Mexico City 11000, DF, Mexico. Natl Med Ctr SIglo XXI, Occupat Hlth Coordinat Coordinac Normat Salud T, IMSS, Mexico City 06725, DF, Mexico. Natl Med Ctr 20 Noviembre, Dept Genom Med & Clin Genet, ISSSTE, Mexico City 03229, DF, Mexico. San Cecilio Univ Hosp, Lab Med Invest, Granada 18080, Spain. RP Lacasana, M, Natl Inst Publ Hlth, Dept Environm Hlth, Cuernavaca 62508, Morelos, Mexico. EM marina.lacasana.easp@juntadeanadalucia.es NR 35 TC 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1360-9947 J9 MOL HUM REPROD JI Mol. Hum. Reprod. PD MAY-JUN PY 2007 VL 13 IS 5-6 BP 419 EP 424 DI 10.1093/molehr/gam017 PG 6 SC Developmental Biology; Reproductive Biology GA 180FS UT ISI:000247348500017 ER PT J AU Garofalo, K Tassi, F Vaselli, O Delgado-Huertas, A Tedesco, D Frische, M Hansteen, TH Poreda, RJ Strauch, W AF Garofalo, K. Tassi, F. Vaselli, O. Delgado-Huertas, A. Tedesco, D. Frische, M. Hansteen, T. H. Poreda, R. J. Strauch, W. TI Fumarolic gases at Mombacho volcano (Nicaragua): presence of magmatic gas species and implications for volcanic surveillance SO BULLETIN OF VOLCANOLOGY LA English DT Article DE Nicaragua; Mombacho volcano; fumarolic gases; geochemical monitoring; fluid geochemistry; isotope geochemistry ID EL-CHICHON-VOLCANO; IZU-OGASAWARA ARC; LIGHT-HYDROCARBONS; IWOJIMA VOLCANO; COSTA-RICA; ORIGIN; TEMPERATURE; SYSTEM; JAPAN; WATER AB Mombacho is a deeply dissected volcano belonging to the Quaternary volcanic chain of Nicaragua. The southern, historic collapse crater (El Crater) currently hosts a fumarolic field with a maximum temperature of 121 degrees C. Chemical and isotopic data from five gas-sampling field campaigns carried out in 2002, 2003 and 2005 highlight the presence of high-temperature gas components (e.g. SO2, HCl and HF), which indicate a significant contribution of juvenile magmatic fluids to the hydrothermal system feeding the gas discharges. This is strongly supported by the mantle-derived helium and carbon isotopic signatures, although the latter is partly masked by either a sedimentary subduction-related or a shallow carbonate component. The observed chemical and isotopic composition of the Mombacho fluids seems to indicate that this volcanic system, although it has not experienced eruptive events during the last centuries, can be considered active and possibly dangerous, in agreement with the geophysical data recorded in the region. Systematic geochemical monitoring of the fumarolic gas discharges, coupled with a seismic and ground deformation network, is highly recommended in order to monitor a possible new eruptive phase. C1 IFM, GEOMAR, SFB 574, D-24148 Kiel, Germany. Univ Florence, Dept Earth Sci, I-50121 Florence, Italy. CNR, IGG, Inst Geosci & Earth Resources, I-50121 Florence, Italy. CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Naples 2, Dept Environm Sci, I-81100 Caserta, Italy. CNR, CNR, Inst Environm Geol & Geoengn, I-00100 Rome, Italy. Dept Earth & Environm Sci, Rochester, NY 14627 USA. Inst Nicaraguense Estudios Terr, INETER, Frente Policlin Oriental, Managua 21100, Nicaragua. RP Garofalo, K, IFM, GEOMAR, SFB 574, Wischhofstr 1-3, D-24148 Kiel, Germany. EM kgarofalo@ifm-geomar.de NR 66 TC 0 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0258-8900 J9 BULL VOLCANOL JI Bull. Volcanol. PD JUN PY 2007 VL 69 IS 7 BP 785 EP 795 DI 10.1007/s00445-006-0108-z PG 11 SC Geosciences, Multidisciplinary GA 180SF UT ISI:000247385400005 ER PT J AU Bruntt, H Stello, D Suarez, JC Arentoft, T Bedding, TR Bouzid, MY Csubry, Z Dall, TH Dind, ZE Frandsen, S Gilliland, RL Jacob, AP Jensen, HR Kang, YB Kim, SL Kiss, LL Kjeldsen, H Koo, JR Lee, JA Lee, CU Nuspl, J Sterken, C Szabo, R AF Bruntt, H. Stello, D. Suarez, J. C. Arentoft, T. Bedding, T. R. Bouzid, M. Y. Csubry, Z. Dall, T. H. Dind, Z. E. Frandsen, S. Gilliland, R. L. Jacob, A. P. Jensen, H. R. Kang, Y. B. Kim, S.-L. Kiss, L. L. Kjeldsen, H. Koo, J.-R. Lee, J.-A. Lee, C.-U. Nuspl, J. Sterken, C. Szabo, R. TI Multisite campaign on the open cluster M67 - III. delta Scuti pulsations in the blue stragglers SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE blue stragglers; stars : individual : EX Cnc; stars : individual; EW Cnc; delta Scuti; open clusters and associations : individual : M67 (NGC 2682) ID SOLAR-LIKE OSCILLATIONS; RESOLVED CCD PHOTOMETRY; OLD OPEN CLUSTERS; STAR FG-VIR; BETA PHOTOMETRY; EFFECTIVE TEMPERATURE; STELLAR OSCILLATIONS; SURFACE GRAVITY; PROPER MOTIONS; LOG-G AB We have made an asteroseismic analysis of the variable blue stragglers in the open cluster M67. The data set consists of photometric time-series from eight sites using nine 0.6-2.1 m telescopes with a time-baseline of 43 d. In two stars, EW Cnc and EX Cnc, we detect the highest number of frequencies (41 and 26) detected in delta Scuti stars belonging to a stellar cluster, and EW Cnc has the second highest number of frequencies detected in any delta Scuti star. We have computed a grid of pulsation models that take the effects of rotation into account. The distribution of observed and theoretical frequencies shows that in a wide frequency range a significant fraction of the radial and non-radial low-degree modes are excited to detectable amplitudes. Despite the large number of observed frequencies we cannot constrain the fundamental parameters of the stars. To make progress we need to identify the degrees of some of the modes from either multicolour photometry or spectroscopy. C1 Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia. Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus, Denmark. USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA. CSIC, Inst Astrofis Andalucia, E-3004 Granada, Spain. UMR, LESIA, Observ Paris, F-8109 Meudon, France. Aarhus Univ, Danish Asteroseismol Ctr, DK-8000 Aarhus, Denmark. Vrije Univ Brussels, B-1050 Brussels, Belgium. Hungarian Acad Sci, Konkoly Observ Budapest, H-1525 Budapest, Hungary. Gemini Observ, Hilo, HI 96720 USA. European So Observ, Santiago 19, Chile. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Chungnam Natl Univ, Dept Astron & Space Sci, Taejon 305764, South Korea. Korea Astron & Space Sci Inst, Taejon 305, South Korea. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. RP Bruntt, H, Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia. EM bruntt@physics.usyd.edu.au NR 65 TC 2 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUL 11 PY 2007 VL 378 IS 4 BP 1371 EP 1384 DI 10.1111/j.1365-2966.2007.11865.x PG 14 SC Astronomy & Astrophysics GA 184UK UT ISI:000247667900015 ER PT J AU Levan, AJ Jakobsson, P Hurkett, C Tanvir, NR Gorosabel, J Vreeswijk, P Rol, E Chapman, R Gehrels, N O'Brien, PT Osborne, JP Priddey, RS Kouveliotou, C Starling, R Berk, DV Wiersema, K AF Levan, A. J. Jakobsson, P. Hurkett, C. Tanvir, N. R. Gorosabel, J. Vreeswijk, P. Rol, E. Chapman, R. Gehrels, N. O'Brien, P. T. Osborne, J. P. Priddey, R. S. Kouveliotou, C. Starling, R. Vanden Berk, D. Wiersema, K. TI A case of mistaken identity? GRB 060912A and the nature of the long-short GRB divide SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE gamma-rays : bursts ID GAMMA-RAY BURST; HOST GALAXY; STAR-FORMATION; VLT SPECTROSCOPY; AFTERGLOW; SUPERNOVA; REDSHIFT; FAINT; PROGENITORS; CONSTRAINTS AB We investigate the origin of the GRB 060912A, which has observational properties that make its classification as either a long or short burst ambiguous. Short-duration gamma-ray bursts (SGRBs) are thought to have typically lower energies than long-duration bursts, can be found in galaxies with populations of all ages and are likely to originate from different progenitors to the long-duration bursts. However, it has become clear that duration alone is insufficient to make a distinction between the two populations in many cases, leading to a desire to find additional discriminators of burst type. GRB 060912A had a duration of 6 s and occurred only similar to 10 arcsec from a bright, low-redshift (z = 0.0936) elliptical galaxy, suggesting that this may have been the host, which would favour it being a short burst. However, our deep optical imaging and spectroscopy of the location of GRB 060912A using the Very Large Telescope (VLT) shows that GRB 060912A more likely originates in a distant star-forming galaxy at z = 0.937, and is most likely a long burst. This demonstrates the risk in identifying bright, nearby galaxies as the hosts of given gamma-ray bursts (GRBs) without further supporting evidence. Further, it implies that, in the absence of secure identifications, 'host' type, or more broadly discriminators that rely on galaxy redshifts, may not be good indicators of the true nature of any given GRB. C1 Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Inst Astrofis Andalucia, CSIC, IAA, E-18080 Granada, Spain. European So Observ, Santiago, Chile. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. NASA, George C Marshall Space Flight Ctr, NSSTC, Huntsville, AL 35805 USA. Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. RP Levan, AJ, Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. EM a.j.levan@warwick.ac.uk NR 59 TC 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUL 11 PY 2007 VL 378 IS 4 BP 1439 EP 1446 DI 10.1111/j.1365-2966.2007.11879.x PG 8 SC Astronomy & Astrophysics GA 184UK UT ISI:000247667900022 ER PT J AU Guallar-Castillon, P Rodriguez-Artalejo, F Fornes, NS Banegas, JR Etxezarreta, PA Ardanaz, E Barricarte, A Chirlaque, MD Iraeta, MD Larranaga, NL Losada, A Mendez, M Martinez, C Quiros, JR Navarro, C Jakszyn, P Sanchez, MJ Tormo, MJ Gonzalez, CA AF Guallar-Castillon, Pilar Rodriguez-Artalejo, Fernando Fornes, Nelida Schmid Banegas, Jose R. Etxezarreta, Pilar Amiano Ardanaz, Eva Barricarte, Aurelio Chirlaque, Maria-Dolores Iraeta, Miren Dorronsoro Larranaga, Nerea Larranaga Losada, Adamina Mendez, Michelle Martinez, Carmen Quiros, Jose R. Navarro, Carmen Jakszyn, Paula Sanchez, Maria J. Tormo, Maria J. Gonzalez, Carlos A. TI Intake of fried foods is associated with obesity in the cohort of Spanish adults from the European Prospective Investigation into Cancer and Nutrition SO AMERICAN JOURNAL OF CLINICAL NUTRITION LA English DT Article DE fried food; general obesity; central obesity; olive oil; Spain ID CORONARY-HEART-DISEASE; DIETARY-FAT INTAKE; ENERGY-INTAKE; HETEROCYCLIC AMINES; PHYSICAL-ACTIVITY; BREAST-CANCER; WOMEN; RISK; CONSUMPTION; OVERWEIGHT AB Background: Consumption of fried food has been suggested to promote obesity, but this association has seldom been studied. Objective: We aimed to assess the association of energy intake from fried food with general and central obesity in Spain, a Mediterranean country where frying with oil is a traditional cooking procedure. Design: This was a cross-sectional study of 33 542 Spanish persons aged 29-69 y who were participating in the European Prospective Investigation into Cancer and Nutrition between 1992 and 1996. Dietary intake was assessed by a diet history questionnaire. Height, weight, and waist circumference were measured by trained interviewers. Analyses were performed with logistic regression and were adjusted for total energy intake and other confounders. Results: The prevalence of general obesity [body mass index (in kg/m(2)) 30] was 27.6% in men and 27.7% in women. Respective figures for central obesity (waist circumference >= 102 cm in men and >= 88 cm in women) were 34.5% and 42.6%. The average proportion of energy intake from fried food was 15.6% in men and 12.6% in women. The adjusted odds ratios for general obesity in the highest versus the lowest quintile of fried food intake were 1.26 (95% CI: 1.09, 1.45; P for trend < 0.001) in men and 1.25 (1.11, 1.41; P for trend < 0.001) in women. The corresponding values for central obesity were 1.17 (1.02, 1.34; P for trend < 0.003) in men and 1.27 (1.13, 1.42; P for trend < 0.001) in women. Conclusion: Fried food was positively associated with general and central obesity only among subjects in the highest quintile of energy intake from fried food. C1 Univ Autonoma Madrid, Fac Med, Dept Med Prevent & Salud Publ, Madrid 28029, Spain. Johns Hopkins Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA. Univ Fed Goias, Sch Nutr, Goiania, Go, Brazil. Hlth Dept Basque Country, Publ Hlth Div Gipuzkoa, Donostia San Sebastian, Spain. Publ Hlth Inst Navarra, Pamplona, Spain. Murcia Hlth Council, Dept Epidemiol, Murcia, Spain. Consejeria Salud & Serv Sanitarios Asturias, Direcc Gen Salud Publ & Planificac, Oviedo, Spain. Catalan Inst Oncol, Grp Nutr Environm & Canc, Dept Epidemiol & Canc Registry, Barcelona, Spain. Escuela Andaluza Salud Publ, Granada, Spain. RP Guallar-Castillon, P, Univ Autonoma Madrid, Fac Med, Dept Med Prevent & Salud Publ, Avda Arzobispo Morcillo sn, Madrid 28029, Spain. EM mpilar.guallar@uam.es NR 61 TC 1 PU AMER SOC CLINICAL NUTRITION PI BETHESDA PA 9650 ROCKVILLE PIKE, SUBSCRIPTIONS, RM L-3300, BETHESDA, MD 20814-3998 USA SN 0002-9165 J9 AMER J CLIN NUTR JI Am. J. Clin. Nutr. PD JUL PY 2007 VL 86 IS 1 BP 198 EP 205 PG 8 SC Nutrition & Dietetics GA 189IF UT ISI:000247981900028 ER EFFN ISI Export Format VR 1.0 PT J AU Rodriguez, NM Campos, WE Lachica, ML Borges, I Goncalves, LC Borges, ALCC Saliba, EOS AF Rodriguez, N. M. Campos, W. E. Lachica, M. L. Borges, I. Goncalves, L. C. Borges, A. L. C. C. Saliba, E. O. S. TI A calorimetry system for metabolism trials SO ARQUIVO BRASILEIRO DE MEDICINA VETERINARIA E ZOOTECNIA LA English DT Article DE calibration; open circuit; respirometry ID RESPIRATION AB An indirect calorimetry system for rapid determination of CO2 and CH4 production and O-2 consumption to estimate heat production of animals was built at Escola de Veterinaria da Universidade Federal de Minas Gerais, Brazil. Procedures for determination of correction and calibration factors for gas analyzers and the whole system, using standard test gases were described. In addition, a metabolic trial was performed to evaluate heat production of lambs fed ad libitum. It is concluded that the system is suitable for heat production determinations in small and medium size animals. C1 Univ Fed Minas Gerais, Escola Vet, BR-30123970 Belo Horizonte, MG, Brazil. Estac Expt Zaina, Dept Anim Nutr, Granada, Spain. RP Rodriguez, NM, Univ Fed Minas Gerais, Escola Vet, BR-30123970 Belo Horizonte, MG, Brazil. EM noberto@vet.ufmg.br NR 13 TC 0 PU ARQUIVO BRASILEIRO MEDICINA VETERINARIA ZOOTECNIA PI MINAS GERAIS PA FEDERAL MINAS GERAIS CAIXA POSTAL 567-BELO HORIZ, MINAS GERAIS, BRAZIL SN 0102-0935 J9 ARQ BRAS MED VET ZOOTEC JI Arq. Bras. Med. Vet. Zootec. PD APR PY 2007 VL 59 IS 2 BP 495 EP 500 PG 6 SC Veterinary Sciences GA 191BS UT ISI:000248105400033 ER PT J AU Gomez, LM Anaya, JM Vilchez, JR Cadena, J Hinojosa, R Velez, L Lopez-Nevot, MA Martin, J AF Gomez, Luis Miguel Anaya, Juan-Manuel Vilchez, Jose Ramon Cadena, Jose Hinojosa, Rosa Velez, Luciano Lopez-Nevot, Miguel Angel Martin, Javier TI A polymorphism in the inducible nitric oxide synthase gene is associated with tuberculosis SO TUBERCULOSIS LA English DT Article DE genetics; nitric oxide; synthases; tuberculosis ID MYCOBACTERIUM-TUBERCULOSIS; PULMONARY TUBERCULOSIS; ALVEOLAR MACROPHAGES; NOS2 GENE; PROMOTER POLYMORPHISM; REPEAT POLYMORPHISM; (CCTTT)(N) REPEAT; UP-REGULATION; SUSCEPTIBILITY; POPULATION AB iNOS or NOS2 is a molecule that plays a key role in the immunological control of a broad spectrum of infectious agents. Investigation is hampered by difficulty in estimating in vivo production of nitric oxide (NO), but genetic studies provide a potential means of examining the relation between NO production and disease outcome. To better characterize the host genetic factors determining the susceptibility to TB, we evaluated the influence of two polymorphisms in the NOS2A gene on the risk of developing pulmonary TB in a Northwestern Colombian population, which is a moderately-high endemic area. One hundred and fourteen patients with TB and negative for human immunodeficiency virus, plus 304 healthy controls were examined for NOS2A CCTTT and TAAA polymorphisms. A total of 160 healthy controls mentioned before, underwent tuberculin skin test (TST). Analysis disclosed significant differences between patients and controls with NOS2A CCTTT polymorphism (P = 0.0001, Pc = 0.001, OR = 0.4, and 95%Cl = 0.3-0.7) independent of TST status. When the NOS2A alleles were stratified into short (8-11) and long (12-16) repeats, significant differences with short repeats were observed between TB patients and all controls (P = 0.005, OR = 0.63, 95% Cl = 0.46-0.86). No individual association with NOS2A TAAA was detected. These results indicate that a polymorphism in the NOS2A gene influences the susceptibility to TB and suggest a role for NOS2A in the pathogenesis of mycobacterial infection. (c) 2007 Elsevier Ltd. All rights reserved. C1 Consejo Super Invest Cient, Granada 18100, Spain. Corp Invest Biol CIB, Cellular Biol & Immunogenet Unit, Medellin, Colombia. Hosp Virgen Nieves, Serv Immunol, Granada, Spain. Univ Nacl Rosario, CIB, Cellular Biol & Immunogenet Unit, Medellin, Colombia. RP Martin, J, Consejo Super Invest Cient, Parque Tecnol Ciencias Salud,Avda Conocimiento S-, Granada 18100, Spain. EM janaya@cib.org.co martin@ipb.csic.es NR 46 TC 0 PU CHURCHILL LIVINGSTONE PI EDINBURGH PA JOURNAL PRODUCTION DEPT, ROBERT STEVENSON HOUSE, 1-3 BAXTERS PLACE, LEITH WALK, EDINBURGH EH1 3AF, MIDLOTHIAN, SCOTLAND SN 1472-9792 J9 TUBERCULOSIS JI Tuberculosis PD JUL PY 2007 VL 87 IS 4 BP 288 EP 294 DI 10.1016/j.tube.2007.03.002 PG 7 SC Immunology; Microbiology; Respiratory System GA 191UH UT ISI:000248157000004 ER PT J AU Dall, TH Foellmi, C Pritchard, J Lo Curto, G Prieto, CA Bruntt, H Amado, PJ Arentoft, T Baes, M Depagne, E Fernandez, M Ivanov, V Koesterke, L Monaco, L O'Brien, K Sarro, LM Saviane, I Scharwachter, J Schmidtobreick, L Schuetz, O Seifahrt, A Selman, F Stefanon, M Sterzik, M AF Dall, T. H. Foellmi, C. Pritchard, J. Lo Curto, G. Prieto, C. Allende Bruntt, H. Amado, P. J. Arentoft, T. Baes, M. Depagne, E. Fernandez, M. Ivanov, V. Koesterke, L. Monaco, L. O'Brien, K. Sarro, L. M. Saviane, I. Scharwaechter, J. Schmidtobreick, L. Schuetz, O. Seifahrt, A. Selman, F. Stefanon, M. Sterzik, M. TI VSOP: the variable star one-shot project - I. Project presentation and first data release SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars; variables; general - stars; fundamental parameters - methods; observational - astronomical data bases; miscellaneous ID RADIAL-VELOCITY MEASUREMENTS; HIGH-RESOLUTION SPECTROSCOPY; SOUTHERN LUMINOUS STARS; LARGE-MAGELLANIC-CLOUD; SKY VARIABILITY SURVEY; LTE MODEL ATMOSPHERES; TIME-SERIES ANALYSIS; RR-LYRAE STARS; EXTRASOLAR PLANETS; LUNAR OCCULTATION AB Context. About 500 new variable stars enter the General Catalogue of Variable Stars (GCVS) every year. Most of them however lack spectroscopic observations, which remains critical for a correct assignement of the variability type and for the understanding of the object. Aims. The Variable Star One-shot Project (VSOP)is aimed at (1) providing the variability type and spectral type of all unstudied variable stars, (2) process, publish, and make the data available as automatically as possible, and (3) generate serendipitous discoveries. This first paper describes the project itself, the acquisition of the data, the dataflow, the spectroscopic analysis and the on-line availability of the fully calibrated and reduced data. We also present the results on the 221 stars observed during the first semester of the project. Methods. We used the high-resolution echelle spectrographs HARPS and FEROS in the ESO La Silla Observatory (Chile) to survey known variable stars. Once reduced by the dedicated pipelines, the radial velocities are determined from cross correlation with synthetic template spectra, and the spectral types are determined by an automatic minimum distance matching to synthetic spectra, with traditional manual spectral typing cross-checks. The variability types are determined by manually evaluating the available light curves and the spectroscopy. In the future, a new automatic classifier, currently being developed by members of the VSOP team, based on these spectroscopic data and on the photometric classifier developed for the COROT and Gaia space missions, will be used. Results. We confirm or revise spectral types of 221 variable stars from the GCVS. We identify 26 previously unknown multiple systems, among them several visual binaries with spectroscopic binary individual components. We present new individual results for the multiple systems V349 Vel and BC Gru, for the composite spectrum star V4385 Sgr, for the T Tauri star V1045 Sco, and for DM Boo which we re-classify as a BY Draconis variable. The complete data release can be accessed via the VSOP web site. C1 Gemini Observ, Hilo, HI 96720 USA. Lab Astrophys Grenoble, F-38400 St Martin Dheres, France. European So Observ, D-85748 Garching, Germany. European So Observ, Santiago, Chile. Univ Texas, McDonald Observ, Austin, TX 78712 USA. Univ Texas, Dept Astron, Austin, TX 78712 USA. Univ Sydney, Sch Phys A28, Sydney, NSW 2006, Australia. Univ Granada, IAA, CSIC, E-18080 Granada, Spain. Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Ghent, Sterrenkundig Observ, B-9000 Ghent, Belgium. Pontificia Univ Catolica Chile, Santiago, Chile. Inst Astrofis Andalucia, E-18008 Granada, Spain. ETSI Informat, Dept Artificial Intelligence, E-28040 Madrid, Spain. Astrophys Inst, D-07745 Jena, Germany. Univ Sternwarte Jena, D-07745 Jena, Germany. RP Dall, TH, Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA. EM tdall@gemini.edu NR 75 TC 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2007 VL 470 IS 3 BP 1201 EP 1214 DI 10.1051/0004-6361:20077571 PG 14 SC Astronomy & Astrophysics GA 192HE UT ISI:000248190700043 ER PT J AU Camacho, ME Martinez, M Leon, JM Quiroz, J Pleguezuelo, J Delgado, JV AF Camacho, M. E. Martinez, M. Leon, J. M. Quiroz, J. Pleguezuelo, J. Delgado, J. V. TI Advances in the breeding program of the Murciano-Granadina dairy goat breed SO ITALIAN JOURNAL OF ANIMAL SCIENCE LA English DT Article C1 Andalusian Govt, IFAPA, Andalucia, Spain. Univ Cordoba, Dept Genet, E-14071 Cordoba, Spain. Provicial Govt Cordoba, Delegat Tourims & Dev, Cordoba, Spain. INIFAP, Tabasco, Mexico. Murciano Granadina Breeders Assoc, Granada, Spain. RP Camacho, ME, Maria Esperanza Camacho IFAPA Hinojosa del Duque, Carretera Viso Km 2,Box 14, Cordoba 14270, Spain. EM mariae.camacho@juntadeandalucia.es NR 0 TC 0 PU AVENUE MEDIA PI BOLOGNA PA VIA RIVA RENO 61, BOLOGNA, 40122, ITALY SN 1594-4077 J9 ITAL J ANIM SCI JI Ital. J. Anim. Sci. PY 2007 VL 6 SU Suppl. 1 BP 56 EP 56 PG 1 SC Agriculture, Dairy & Animal Science; Veterinary Sciences GA 193LU UT ISI:000248276300012 ER PT J AU Leon, JM Quiroz, J Martinez, M Camacho, ME Puntas, J Delgado, JV AF Leon, J. M. Quiroz, J. Martinez, M. Camacho, M. E. Puntas, J. Delgado, J. V. TI The breeding program of the Segureno meat sheep breed SO ITALIAN JOURNAL OF ANIMAL SCIENCE LA English DT Article C1 Delegat Tourims & Dev Prov Govt Cordoba, E-14071 Cordoba, Spain. INIFAP, Tabasco, Mexico. Univ Cordoba, Dept Genet, E-14071 Cordoba, Spain. IFAPA Andalusian Govt, Andalucia, Spain. Segureno Breededers Assoc, Granada, Spain. RP Leon, JM, Delegat Tourims & Dev Prov Govt Cordoba, Carretera Alcolea Km 5, E-14071 Cordoba, Spain. EM jomalejur@yahoo.es NR 0 TC 0 PU AVENUE MEDIA PI BOLOGNA PA VIA RIVA RENO 61, BOLOGNA, 40122, ITALY SN 1594-4077 J9 ITAL J ANIM SCI JI Ital. J. Anim. Sci. PY 2007 VL 6 SU Suppl. 1 BP 149 EP 149 PG 1 SC Agriculture, Dairy & Animal Science; Veterinary Sciences GA 193LU UT ISI:000248276300057 ER PT J AU Marin, VMM Delgado, RMG Schmitt, HR Fernandes, RC Perez, E Storchi-Bergmann, T Heckman, T Leitherer, C AF Marin, Victor M. Munoz Delgado, Rosa M. Gonzalez Schmitt, Henrique R. Fernandes, Roberto Cid Perez, Enrique Storchi-Bergmann, Thaisa Heckman, Tim Leitherer, Claus TI An atlas of the circumnuclear regions of 75 Seyfert galaxies in the near-ultraviolet with the Hubble Space Telescope Advanced Camera for Surveys SO ASTRONOMICAL JOURNAL LA English DT Article DE atlases; galaxies : nuclei; galaxies : Seyfert; galaxies : starburst; galaxies : star clusters ID ACTIVE GALACTIC NUCLEI; ANISOTROPIC IONIZING-RADIATION; NARROW-LINE REGION; SPIRAL GALAXIES; STAR-CLUSTERS; CIRCINUS GALAXY; SPECTRAL ATLAS; IMAGING SURVEY; LOW-LUMINOSITY; HOST GALAXIES AB We present an atlas of the central regions of 75 Seyfert galaxies imaged in the near-UV with the Advanced Camera for Surveys of the Hubble Space Telescope at an average resolution of similar to 10 pc. These data complement archival high-resolution data from the Hubble Space Telescope at optical and near-IR wavelengths, creating an extremely valuable data set for astronomers with a broad range of scientific interests. Our goal is to investigate the nature of the near-UV light in these objects, its relation to the circumnuclear starburst phenomenon, and the connection of this to the evolution and growth of the galaxy bulge and central black hole. In this paper we describe the near-UV morphology of the objects and characterize the near-UV emission. We estimate the size and the luminosity of the emitting regions and extract the luminosity profile. We also determine the presence of unresolved compact nuclei. In addition, the circumnuclear stellar cluster population is identified, and the contribution of the stellar clusters to the total light, at this wavelength, is estimated. The size of the sample allows us to draw robust statistical conclusions. We find that Seyfert 1 galaxies (Sy 1's) are completely dominated by their bright and compact nuclei, which remains pointlike at this resolution, while we find almost no unresolved nuclei in Seyfert 2 galaxies (Sy2's). The Seyfert types 1 and 2 are quite segregated in an asymmetry versus compactness plot. Stellar clusters are found somewhat more frequently in Sy2's (in similar to 70% of the galaxies) than in Sy1's (similar to 57%), and contribute more to the total light in Sy2's, but these two differences seem to be mostly due to the large contribution of the compact nuclei in Sy1's, as the luminosity distribution of the clusters is similar in both Seyfert types. C1 CSIC, Inst Astrofis Andalucia, Granada 18080, Spain. USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA. Interferometr Inc, Herndon, VA 20171 USA. Univ Fed Santa Catarina, CFM, Dept Fis, BR-88040900 Florianopolis, SC, Brazil. Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Marin, VMM, CSIC, Inst Astrofis Andalucia, POB 3004, Granada 18080, Spain. EM manuel@iaa.es rosa@iaa.es henrique.schmitt@nrl.navy.mil cid@astro.ufsc.br thaisa@if.ufrgs.br NR 78 TC 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD AUG PY 2007 VL 134 IS 2 BP 648 EP 667 PG 20 SC Astronomy & Astrophysics GA 197XY UT ISI:000248591800018 ER PT J AU Perez-Ruiz, M Collao, X Navarro-Mari, JM Tenorio, A AF Perez-Ruiz, Mercedes Collao, Ximena Navarro-Mari, Jose-Maria Tenorio, Antonio TI Reversetranscription, real-time PCR assay for detection of Toscana virus SO JOURNAL OF CLINICAL VIROLOGY LA English DT Article DE Toscana virus; real-time PCR; meningitis ID SANDFLY FEVER VIRUS; SEROTYPE TOSCANA; CLINICAL SPECIMENS; NESTED-PCR; INFECTION; SPAIN; IDENTIFICATION; MENINGITIS; DIAGNOSIS AB Background: The arthropod-borne Toscana virus is a common cause of acute neurological infection in the Mediterranean basin. Recently, a new lineage, highly divergent from the Italian prototype, has been reported in Spain. Objective: We describe a reversetranscription, real-time PCR assay for detection of both Toscana virus genotypes. The real-time PCR uses a TaqMan (R) probe and an internal control to identify false negative results. Study design: A conserved region of the two known lineages of Toscana virus, located at the 3' end of the small segment of their genomes, was chosen to design both the primers and the probe. Results: The sensitivity of the assay was 0.0158 TICD50 per reaction of Toscana virus, equivalent to seven copies of cDNA. No other phleboviruses or RNA viruses were amplified by this specific real-time PCR. Conclusions: The assay seems to be sensitive, reliable and easy to be applied in the diagnosis of autochthonous and/or imported suspected cases of Toscana virus infection. (c) 2007 Elsevier B.V. All rights reserved. C1 Hosp Univ Virgen Nieves, Microbiol Serv, Granada 18014, Spain. Inst Salud Carlos III, Lab Arbovirus & Enfermedades Viri Importadas, Ctr Nacl Microbiol, Madrid 28220, Spain. Univ Valparaiso, Dept Microbiol, Fac Med, Valparaiso, Chile. RP Perez-Ruiz, M, Hosp Univ Virgen Nieves, Microbiol Serv, Avda Fuerzas Armadas 2, Granada 18014, Spain. EM mercedes.perez.ruiz.sspa@juntadeandalucia.es xime.collao@isciii.es josem.navarro.sspa@juntadeandalucia.es atenorio@isciii.es NR 22 TC 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1386-6532 J9 J CLIN VIROL JI J. Clin. Virol. PD AUG PY 2007 VL 39 IS 4 BP 276 EP 281 DI 10.1016/j.jcv.2007.05.003 PG 6 SC Virology GA 201YC UT ISI:000248867500004 ER PT J AU Morales, M Julia, BM Mariano, CG Susana, B Clemente, AG Cecilia, MH Guadalupe, RH AF Morales, M. Julia, B-M Mariano, C-G Susana, B. Clemente, A-G Cecilia, M. H. Guadalupe, RA-H TI Organophosphorous pesticides exposure and reproductive hormone profile in male greenhouse workers of morelos, Mexico SO EPIDEMIOLOGY LA English DT Meeting Abstract C1 CINVESTAV, Mexico City 14000, DF, Mexico. Natl Publ Hlth Inst, Cuernavaca, Morelos, Mexico. Autonomous Univ Coahuila, Res Ctr, Sch Med, Mexico City, DF, Mexico. San Cecilio Univ Hosp, Lab Med Invest, Granada, Spain. NR 0 TC 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1044-3983 J9 EPIDEMIOLOGY JI Epidemiology PD SEP PY 2007 VL 18 IS 5 SU Suppl. S BP S64 EP S64 PG 1 SC Public, Environmental & Occupational Health GA 204BQ UT ISI:000249018300202 ER PT J AU Lacasana, M Aguilar-Garduno, C Blanco-Munoz, J Cebrian, ME Bassol, S Morales-Rodriguez, MM AF Lacasana, M. Aguilar-Garduno, C. Blanco-Munoz, J. Cebrian, M. E. Bassol, S. Morales-Rodriguez, M. M. TI The relationship between thyroid hormones levels and organophosphates pesticides exposure in Mexican greenhouse workers SO EPIDEMIOLOGY LA English DT Meeting Abstract C1 Andalusian Sch Publ Hlth, Granada, Spain. San Cecilio Univ Hosp, Lab Med Invest, Granada, Spain. Natl Inst Publ Hlth, Cuernavaca, Morelos, Mexico. CINVESTAV IPN, External Sect Toxicol, Mexico City, DF, Mexico. NR 0 TC 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1044-3983 J9 EPIDEMIOLOGY JI Epidemiology PD SEP PY 2007 VL 18 IS 5 SU Suppl. S BP S114 EP S114 PG 1 SC Public, Environmental & Occupational Health GA 204BQ UT ISI:000249018300373 ER PT J AU Scervino, JM Ponce, MA Erra-Bassells, R Bornpadre, J Vierheilig, H Ocampo, JA Godeas, A AF Scervino, Jose M. Ponce, Maria A. Erra-Bassells, Rosa Bornpadre, Josefina Vierheilig, Horst Ocampo, Juan A. Godeas, Alicia TI The effect of flavones and flavonols on colonization of tomato plants by arbuscular mycorrhizal fungi of the genera Gigaspora and Glomus SO CANADIAN JOURNAL OF MICROBIOLOGY LA English DT Article DE arbuscular mycorrhiza; flavonoids; flavones; flavonols; signal molecules; symbiosis ID HYPHAL GROWTH; ROOTS; INVITRO; IDENTIFICATION; ESTABLISHMENT; INFECTIONS; CLOVER AB No clear data are available on how flavonoids from different chemical groups affect root colonization by arbuscular mycorrhizal fungi (AMF) and whether flavonoids affecting the presymbiotic growth of AMF also affect root colonization by AMF. In the present work, we compared the effect of flavones (chrysin and luteolin) and flavonols (kaempferol, morin, isorhamnetin, and rutin) on root colonization (number of entry points and degree of root colonization) of tomato plants (Lycopersicum esculentum L.) with the effect of these flavonoids on the presymbiotic growth of these AMF, which has been reported in a recent study. With all tested AMF (Gigaspora rosea, Gigaspora margarita, Glomus mosseae, and Glomus intraradices) a correlation between the number of entry points and the percentage of root colonization was found. When the number of entry points was high, root colonization was also enhanced. Application of the flavones chrysin and luteolin and of the flavonol morin increased the number of entry points and the degree of colonization, whereas the flavonols kaempferol, isorhamnetin, and rutin showed no effect. These results show that in contrast to their effect on the presymbiotic growth of the AMF on the level of root colonization, the tested flavonoids do not exhibit a genus- and species-specificity. Moreover, comparison of our data with the data obtained by J.M. Scervino, M.A. Ponce, R. Erra-Bassells, H. Vierheilig, J.A. Ocampo, and A. Godeas. (2005a. J. Plant Interact. 15: 22-30) indicates that a positive effect on the hyphal 14 growth of AMF does not necessarily result in an enhanced AM root colonization, further indicating that the mode of action of flavonoids at the level of root colonization is more complex. C1 CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioti, E-18008 Granada, Spain. Agr Univ Vienna, Inst Pflanzenschutz, Dept Angew Pflanzenwissensch & Pflanzenbiotechnol, A-1190 Vienna, Austria. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Organ, RA-1428 Buenos Aires, DF, Argentina. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Biodiversidad & Biol Expt, RA-1428 Buenos Aires, DF, Argentina. RP Ocampo, JA, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioti, Prof Albareda 1 Apdo 419, E-18008 Granada, Spain. EM jocampo@eez.csic.es NR 32 TC 0 PU NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS PI OTTAWA PA BUILDING M 55, OTTAWA, ON K1A 0R6, CANADA SN 0008-4166 J9 CAN J MICROBIOL JI Can. J. Microbiol. PD JUN PY 2007 VL 53 IS 6 BP 702 EP 709 PG 8 SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Immunology; Microbiology GA 206SF UT ISI:000249202500004 ER PT J AU Peimbert, M Luridiana, V Peimbert, A AF Peimbert, Manuel Luridiana, Valentina Peimbert, Antonio TI Revised primordial helium abundance based on new atomic data SO ASTROPHYSICAL JOURNAL LA English DT Article DE early universe; galaxies : abundances; galaxies : individual (SBS0335-052, IZw18, Haro29) galaxies : ISM; HII regions; ISM : abundances ID BLUE COMPACT GALAXIES; H 2 REGIONS; ORION-NEBULA; CHEMICAL-COMPOSITION; GASEOUS NEBULAE; PHOTOELECTRIC SPECTROPHOTOMETRY; PHOTOIONIZATION MODELS; COLLISION STRENGTHS; MAGELLANIC-CLOUD; LINE-INTENSITIES AB We have derived a primordial helium abundance of Y-p = 0.2477 +/- 0: 0029, based on new atomic physics computations of the recombination coefficients of He I and of the collisional excitation of the H I Balmer lines together with observations and photoionization models of metal-poor extragalactic H II regions. The new atomic data increase our previous determination of Y-p by 0.0086, a very significant amount. By combining our Y-p result with the predictions made by the standard big bang nucleosynthesis model, we find a baryon-to-photon ratio, eta, in excellent agreement both with the eta-value derived by the primordial deuterium abundance value observed in damped Ly alpha systems and with the one obtained from the WMAP observations. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, E-18008 Granada, Spain. RP Peimbert, M, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. EM peimbert@astroscu.unam.mx vale@iaa.es antonio@astroscu.unam.mx NR 58 TC 7 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 10 PY 2007 VL 666 IS 2 PN Part 1 BP 636 EP 646 PG 11 SC Astronomy & Astrophysics GA 208FR UT ISI:000249305700002 ER PT J AU Alasaad, S Huang, CQ Li, QY Granados, JE Garcia-Romero, C Perez, JM Zhu, XQ AF Alasaad, S. Huang, C. Q. Li, Q. Y. Granados, J. E. Garcia-Romero, C. Perez, J. M. Zhu, X. Q. TI Characterization of Fasciola samples from different host species and geographical localities in Spain by sequences of internal transcribed spacers of rDNA SO PARASITOLOGY RESEARCH LA English DT Article ID RIBOSOMAL DNA-SEQUENCE; COMPLEX NEMATODA; GIGANTICA; HEPATICA; JAPAN; GENE AB In the present study, 25 samples representing Fasciola (Platyhelminthes: Trematoda: Digenea) from nine host species and 19 geographical locations in Spain were characterized genetically by sequences of the first (ITS-1) and second (ITS-2) internal transcribed spacers (ITS) of nuclear ribosomal DNA (rDNA). The ITS rDNA was amplified from individual liver flukes by polymerase chain reaction (PCR), and the amplicons were sequenced directly. The lengths of the ITS-1 and ITS-2 sequences were 422 and 362 bp, respectively, for all Spanish liver fluke samples sequenced. Comparison of the ITS sequences of the Spanish Fasciola samples examined in the present study with that of Fasciola hepatica, Fasciola gigantica and the "intermediate Fasciola" revealed that all Spanish Fasciola samples examined represent the single species of F. hepatica, with only slight sequence variation in the ITS-2 (1/362, 0.3%) among the sequenced samples, but the sequence variation was not related to particular host species and/or geographical origins of the samples. The Spanish F. hepatica examined differed from Fasciola from elsewhere by two nucleotides in the ITS-2, which provided genetic marker for the differentiation of Spanish F. hepatica from Fasciola from other geographical localities. These results have implications for studying the population genetic structure of the Spanish F. hepatica and for the diagnosis and control of the disease it causes. C1 So China Agr Univ, Coll Vet Med, Guangzhou 510642, Guangdong, Peoples R China. Univ Jaen, Dept Anim Biol,Biol Veget Ecol, E-23071 Jaen, Spain. Espacio Nat Sierra Nevada, Carretera Antigua Sierra Nevada, E-18071 Granada, Spain. Consejeria Agr, Parasitol Lab Anim, Serv Invest, E-45002 Toledo, Spain. RP Zhu, XQ, So China Agr Univ, Coll Vet Med, 483 Wushan Str Tianhe Dist, Guangzhou 510642, Guangdong, Peoples R China. EM xingquanzh@scau.edu.cn NR 21 TC 4 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0932-0113 J9 PARASITOL RES JI Parasitol. Res. PD OCT PY 2007 VL 101 IS 5 BP 1245 EP 1250 DI 10.1007/s00436-007-0628-2 PG 6 SC Parasitology GA 209SD UT ISI:000249407400011 ER PT J AU Sanchez, N Alfaro, EJ Elias, F Delgado, AJ Cabrera-Cano, J AF Sanchez, Nestor Alfaro, Emilio J. Elias, Federico Delgado, Antonio J. Cabrera-Cano, Jesus TI The nature of the Gould Belt from a fractal analysis of its stellar population SO ASTROPHYSICAL JOURNAL LA English DT Article DE methods : numerical; solar neighborhood; stars : early-type ID SOLAR NEIGHBORHOOD; STAR-FORMATION; YOUNG STARS; CORRELATION DIMENSION; SPATIAL-DISTRIBUTION; MOLECULAR CLOUDS; OB STARS; KINEMATICS; GALAXIES; CLUSTERS AB The Gould Belt (GB) is a system of gas and young, bright stars distributed along a plane that is inclined with respect to the main plane of the Milky Way. Observational evidence suggests that the GB is our closest star formation complex, but its true nature and origin remain rather controversial. In this work we analyze the fractal structure of the stellar component of the GB. In order to do this, we tailor and apply an algorithm that estimates the fractal dimension in a precise and accurate way, avoiding both boundary and small-data set problems. We find that early OB stars ( of spectral types earlier than B4) in the GB have a fractal dimension very similar to that of the gas clouds in our Galaxy. On the contrary, stars in the GB of later spectral types show a larger fractal dimension, similar to that found for OB stars of both age groups in the local Galactic disk (LGD). This result seems to indicate that while the younger OB stars in the GB preserve the memory of the spatial structure of the cloud where they were born, older stars are distributed following a similar morphology as that found for the LGD stars. The possible causes for these differences are discussed. C1 CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Univ Seville, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, Spain. RP Sanchez, N, CSIC, Inst Astrofis Andalucia, Apartado 3004, E-18080 Granada, Spain. EM nestor@iaa.es emilio@iaa.es felias@astroscu.unam.mx delgado@iaa.es jcc-famn@us.es NR 41 TC 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 20 PY 2007 VL 667 IS 1 PN Part 1 BP 213 EP 218 PG 6 SC Astronomy & Astrophysics GA 210KU UT ISI:000249455900018 ER PT J AU Diez, H Guzman, F Alba, MP Cuellar, A Thomas, MC Lopez, MC Rosas, F Velasco, V Gonzalez, JM Patarroyo, ME Puerta, CJ AF Diez, H. Guzman, F. Alba, M. P. Cuellar, A. Thomas, M. C. Lopez, M. C. Rosas, F. Velasco, V. Gonzalez, J. M. Patarroyo, M. E. Puerta, C. J. TI Immunological and structural characterization of an epitope from the Trypanosoma cruzi KMP-11 protein SO PEPTIDES LA English DT Article DE KMP-11 protein; K1 peptide; alpha-helix; humoral immune response; Chagas' disease; Trypanosoma cruzi ID KINETOPLASTID MEMBRANE PROTEIN-11; CELLULAR IMMUNE-RESPONSES; CHAGAS-DISEASE; MOLECULAR CHARACTERIZATION; LEISHMANIA-DONOVANI; ANTIGENIC PEPTIDES; TRANSGENIC MICE; T-CELLS; ANTIBODY; IDENTIFICATION AB The K1 peptide is an HLA-A*0201-restricted cytotoxic epitope derived from the Trypanosoma cruzi KMP-11 protein, this being the etiological agent of Chagas' disease. This work describes the K1 peptide's secondary structure and its recognition by sera from chagasic patients. Circular dichroism and NMR spectroscopy analysis revealed that the K1 peptide adopts an alpha-helical conformation. Fifty-six percent of individuals had anti-K1 and 86% anti-KMP-11 antibodies by ELISA in the chronic Chagas' group and 28 and 68% in the indeterminate Chagas' group, respectively. By contrast, no reactivity was observed in sera from healthy individuals and tuberculosis patients. Antibody response subclass specificity to the K1 peptide was IgG1 and IgG3. Taken together these results support the idea that the K1 peptide acts as a B-cell-inducer epitope during Chagas' disease. (c) 2007 Elsevier Inc. All rights reserved. C1 Pontif Univ Javeriana, Lab Parasitol Mol, Bogota, Colombia. FIDIC, Fdn Inst Inmunol Colombia, Bogota, Colombia. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. Fdn Clin Abood Shaio, Bogota, Colombia. Univ Los Andes, Grp Ciencias Basicas, Fac Med, Bogota, Colombia. Pontif Univ Javeriana, Grp Inmunobiol & Biol Celular, Bogota, Colombia. RP Puerta, CJ, Pontif Univ Javeriana, Lab Parasitol Mol, Cra 7A 43-82,Ed 50,Lab 113, Bogota, Colombia. EM cpuerta@javeriana.edu.co NR 37 TC 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0196-9781 J9 PEPTIDES JI Peptides PD AUG PY 2007 VL 28 IS 8 BP 1520 EP 1526 DI 10.1016/j.peptides.2007.06.017 PG 7 SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy GA 210UO UT ISI:000249481300006 ER PT J AU Nigoche-Netro, A Moles, M Ruelas-Mayorga, A Franco-Balderas, A Kjaegaard, P AF Nigoche-Netro, A. Moles, M. Ruelas-Mayorga, A. Franco-Balderas, A. Kjaegaard, P. TI Structural properties of isolated early-type galaxies. The dependence of scaling relations on environment SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : elliptical and lenticular; cD; galaxies : fundamental parameters; galaxies : interactions ID SURFACE BRIGHTNESS TEST; DIGITAL SKY SURVEY; FUNDAMENTAL PLANE; ELLIPTIC GALAXIES; STAR-FORMATION; SPIRAL GALAXIES; S0 GALAXIES; PHOTOMETRIC PROPERTIES; VELOCITY DISPERSIONS; STELLAR POPULATIONS AB Aims. In order to investigate whether gravitational interactions between galaxies are able to modify their structural properties, we determine the Kormendy relation (KR) for a sample of isolated early-type galaxies (ETG) for which we have measured several photometric parameters. This relation is compared with that obtained for a sample of ETG of the Coma Cluster, and with that obtained for a sample of perturbed S0 galaxies contained within high-density environments. Methods. Using very strict physical isolation criteria we selected a sample of 82 E and S0 galaxies from the CfA catalogue, in the redshift range 5000 km s(-1) <= cz < 10 000 km s(-1). We obtained the photometric parameters, ( re, < S Be >) and total magnitude for 21 galaxies in the B filter and for 23 in the Gunn r filter. Results. The main result we obtained is that the KR is the same for isolated galaxies and for galaxies in high- density environments or in interaction. In addition we found evidence that the intrinsic dispersion of the KR depends on the magnitude range within which the galaxies are contained (larger dispersion for larger magnitude range), and not on the degree of gravitational interaction to which these galaxies are subjected. C1 Inst Astrofis Andalucia, Granada 18008, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Copenhagen Univ Observ, Niels Bohr Inst Astron Phys & Geophys, DK-2100 Copenhagen, Denmark. RP Nigoche-Netro, A, Inst Astrofis Andalucia, Camino Bajo Huetor 24, Granada 18008, Spain. EM alberto.n@imaff.cfmac.csic.es rarm@astrocu.unam.mx per@astro.ku.dk NR 88 TC 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 2007 VL 472 IS 3 BP 773 EP U22 DI 10.1051/0004-6361:20066398 PG 25 SC Astronomy & Astrophysics GA 214SO UT ISI:000249758600011 ER PT J AU Mkrtichian, DE Kusakin, AV De Coca, PL Krisciunas, K Akan, C Malanushenko, VP Paparo, M Percy, J Rolland, A Costa, V Olivares, JI Koval, VA Hobart, MA Ibanoglu, C Ozturk, A Thompson, S Paunzen, E Handler, G Burnashev, V Weiss, WW Kuratov, KS Kang, YW AF Mkrtichian, D. E. Kusakin, A. V. De Coca, P. Lopez Krisciunas, K. Akan, C. Malanushenko, V. P. Paparo, M. Percy, J. Rolland, A. Costa, V. Olivares, J. I. Koval, V. A. Hobart, M. A. Ibanoglu, C. Ozturk, A. Thompson, S. Paunzen, E. Handler, G. Burnashev, V. Weiss, W. W. Kuratov, K. S. Kang, Y. W. TI Multimode pulsations of the lambda bootis star 29 Cygni: The 1995 and 1996 multisite campaigns SO ASTRONOMICAL JOURNAL LA English DT Article DE stars : individual (29 Cygni); stars : oscillations ID UNEQUALLY-SPACED DATA AB In this paper we present the results of multisite photometric and spectroscopic campaigns, carried out during the years 1995 and 1996, to study the pulsations of a typical lambda Bootis star, 29 Cyg. During the 1995 campaign we found well-defined multiperiodicity in 29 Cyg, which was studied in detail during a multilongitude campaign covering a 65 day time interval in 1996. The frequency analysis of the 1996 campaign's data easily revealed 11 excited low l degree modes with frequencies of oscillation ranging from 20.3 to 37.4 cycles day(-1) and mean photometric amplitudes ranging from 10.65 to 0.96 mmag in the V filter. After removing the well-identified frequencies, the discrete Fourier transform of the residuals showed excess power in the 20-40 cycle day(-1) domain, which indicates the probable existence of unresolved rich p-mode spectra with photometric V amplitudes below 0.5 mmag. We found a regular spacing of 2.41 cycles day(-1) within the modes of 29 Cyg, which was interpreted as the spacing of consecutive even and odd l-values. The asteroseismic luminosity log L/L-circle dot = 1.12, calculated from the frequency spacing, is in good agreement with the Hipparcos luminosity log L/L-circle dot = 1.16 and with luminosities from photometric and spectroscopic calibrations. Using our multicolor photometry we tentatively identified the dominant f(1) 37.425 cycle day(-1) mode as an l = 2, n = 5mode, and made radial overtone identification for all frequencies. These ranged from n 2 to 5. Analysis of the photometric data shows the long-term ( years) and probable short-term ( days) variability of amplitudes for all of these modes in 29 Cyg. Using our multicolor WBVR filter photometry, we found the wavelength dependence of the pulsation amplitudes for the five highest amplitude modes. Based on the H alpha line radial velocity observations of 29 Cyg, we detected multiperiodic radial velocity variations with frequencies of 38.36 and 29.99 cycles day(-1) and semiamplitudes of 1.0 and 0.8 km s(-1), respectively. These frequencies coincide within the errors with the photometric frequencies of the two highest amplitude modes, 37.425 and 29.775 cycles day(-1). For the highest amplitude l = 2, n= 5 mode ( 37.425 cycles day(-1)), the radial velocity-to-light amplitude ratio and velocity-to-light phase shift are equal to 2K(H alpha)/Delta V 94 km mag(-1) s(-1) and Phi(f1) = phi(Vr) - phi V = +0: 08 +/- 0.01, respectively, and are in good agreement with values for delta Scuti stars. The rich multiperiodic spectrum makes 29 Cyg a promising target for future multisite campaigns. C1 Sejong Univ, Astrophys Res Ctr Struct & Evolut Cosmos, Seoul 143747, South Korea. Odessa Natl Univ, Astron Observ, UA-650014 Odessa, Ukraine. Sternberg State Astron Inst, RU-119899 Moscow, Russia. Natl Acad Sci Kazakhstan, Fesenkov Astrophys Inst, Alma Ata 050068, Kazakhstan. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Cerro Tololo Interamer Observ, La Serena, Chile. Ege Univ Observ, Izmir, Turkey. Crimean Astrophys Observ, UA-334413 Nauchnyi, Ukraine. Isaac Newton Inst Chile, Crimean Branch, UA-334413 Nauchnyi, Ukraine. Konkoly Observ Budapest, H-1525 Budapest, Hungary. Univ Toronto, Mississauga, ON L5L 1C6, Canada. Univ Veracruzana, Fac Fis, Xalapa 91000, Veracruz, Mexico. Univ Vienna, Inst Astron, A-1180 Vienna, Austria. RP Mkrtichian, DE, Sejong Univ, Astrophys Res Ctr Struct & Evolut Cosmos, Seoul 143747, South Korea. NR 24 TC 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD OCT PY 2007 VL 134 IS 4 BP 1713 EP 1727 PG 15 SC Astronomy & Astrophysics GA 215BG UT ISI:000249781800038 ER PT J AU Zafra, G Morillo, C Martin, J Gonzalez, A Gonzalez, CI AF Zafra, German Morillo, Carlos Martin, Javier Gonzalez, Antonio Isabel Gonzalez, Clara TI Polymorphism in the 3 ' UTR of the IL12B gene is associated with Chagas' disease cardiomyopathy SO MICROBES AND INFECTION LA English DT Article DE Chagas' disease; interleukin 12; polymorphism; Trypanosoma cruzi ID TRYPANOSOMA-CRUZI INFECTION; IL-12 P40 GENE; CELL RESPONSES; INTERLEUKIN-12; GLYCOINOSITOLPHOSPHOLIPIDS; EXPRESSION; RESISTANCE; CYTOKINES AB The aim of this study was to investigate the possible influence of a 3' untranslated region (3' UTR) polymorphism of the IL12B gene in susceptibility to Trypanosome crttzi infection or in the development to cardiomyopathy in Chagas' disease (CD). We determined the IL12B 3' UTR genotypes in a sample of 200 seronegative individuals and 260 serologically positive patients (130 with Chagasic cardiomyopathy and 130 asymptomatic). All individuals are from a Colombian region where T. cruzi infection is endemic. Genotyping was performed by the PCR-restriction fragment length polymorphism (RFLP) method. The overall distribution of the IL12B 3' UTR alleles and genotypes in seronegative compared with seropositive individuals was not statistically significant. Interestingly, we found that the IL12B 3' UTR CC genotype was significantly increased among cardiomyopathic patients when compared to asymptomatic individuals (16% versus 5%; P = 0.005; P-c = 0.015; OR = 3.39; 95% CI 1.3-9.15). In addition, we observed that the IL12B 3' UTR C allele was present at significantly higher frequency in cardiomyopathic (33% versus 22%; P = 0.008; P-c = 0.016; OR = 1.69; 95% CI 1.12-2.55) as compared to asymptomatic. Our results suggest that IL12B 3' UTR gene polymorphisms may influence the susceptibility to develop Chagasic cardiomyopathy. (C) 2007 Elsevier Masson SAS. All rights reserved. C1 Univ Ind Santander, Sch Bacteriol, Fac Salud, Bucaramanga 678, AA, Colombia. Univ Ind Santander, GIEM, Fac Salud, Grp Inmunol & Epidemiol Mol, Bucaramanga, Colombia. Fdn Cardiovasc Colombia, Grp Invest Syst Nervous Autonom, Floridablanca, Colombia. Parque Technol Ciencias Salud, Consejo Super Investigat Sci, Inst Parasitol & Biomed Lopes Neyra, Granada, Spain. RP Gonzalez, CI, Univ Ind Santander, Sch Bacteriol, Fac Salud, Carrera 32 29,31, Bucaramanga 678, AA, Colombia. EM cig@uis.edu.co NR 30 TC 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1286-4579 J9 MICROBES INFECT JI Microbes Infect. PD JUL PY 2007 VL 9 IS 9 BP 1049 EP 1052 DI 10.1016/j.micinf.2007.04.010 PG 4 SC Immunology; Microbiology; Virology GA 216TZ UT ISI:000249903200002 ER PT J AU de Gregorio-Monsalvo, I D'Alessio, P Gomez, JF AF de Gregorio-Monsalvo, Itziar D'Alessio, Paola Gomez, Jose F. TI Statistical analysis of molecular line emission from T Tauri disk models SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE ISM : molecules; methods : statistical; planetary systems : protoplanetary disks; radiative transfer ID MAIN-SEQUENCE STARS; ACCRETION DISKS; YOUNG OBJECTS; PROTOPLANETARY DISKS; CIRCUMSTELLAR DISKS; GAS TEMPERATURE; KEPLERIAN DISK; CONTINUUM; DISTRIBUTIONS; IRRADIATION AB In this work we model the expected emission from the molecular line (CO)-O-17(J=3 -> 42) in protoplanetary disks, modifying different physical parameters to obtain distinctive observational signatures. Our aim is to determine the kind of observations that will allow us to extract information about the physical parameters of disks. With this purpose we periorm a statistical analysis of principal components and a multiple linear correlation on our set, of results from the models. We also present prospects for future molecular line observations of protoplanetary disks using SMA and ALMA. C1 Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, Granada, Spain. RP de Gregorio-Monsalvo, I, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Campus Morelia,Apartado Postal 3-72, Morelia 58090, Michoacan, Mexico. EM p.dalessio@astrosmo.unam.mx idegrego@eso.org jfg@iaa.es NR 37 TC 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 2007 VL 43 IS 2 BP 271 EP 281 PG 11 SC Astronomy & Astrophysics GA 217DV UT ISI:000249929500004 ER PT J AU Pena, JH Machado, LF Garrido, R AF Pena, J. H. Fox Machado, L. Garrido, R. TI uvby - beta photoelectric photometry of NGC 7063 SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE open clusters and associations : individual (NGC 7063) techniques : photometric ID OPEN CLUSTERS; STARS AB From uvby photometry of 75 stars in the direction of NGC 7063 we were able to determine membership of some stars and fix the distance (722 +/- 105 pc), log age (8.146) and reddening (E(b - y) = 0.091 +/- 0.039 mag) for the cluster. C1 Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22860, Baja California, Mexico. Inst Astrofis Andalucia, E-18008 Granada, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. RP Pena, JH, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 877, Ensenada 22860, Baja California, Mexico. EM lfox@astrosen.unam.mx garrido@iaa.es jhpena@astroscu.unam.mx NR 22 TC 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 2007 VL 43 IS 2 BP 329 EP 335 PG 7 SC Astronomy & Astrophysics GA 217DV UT ISI:000249929500011 ER PT J AU Leon, S Eckart, A Laine, S Kotilainen, JK Schinnerer, E Lee, SW Krips, M Reunanen, J Scharwachter, J AF Leon, S. Eckart, A. Laine, S. Kotilainen, J. K. Schinnerer, E. Lee, S.-W. Krips, M. Reunanen, J. Scharwaechter, J. TI Nuclear starburst-driven evolution of the central region in NGC 6764 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE ISM : jets and outflows; galaxies : active; ISM : kinematics and dynamics; ISM : individual : objects : NGC 6764 radio; lines : galaxies ID H-II-REGIONS; MOLECULAR GAS; SEYFERT-GALAXIES; STAR-FORMATION; INTERSTELLAR-MEDIUM; SPIRAL GALAXIES; GALACTIC-CENTER; RADIO; CONTINUUM; BARS AB Aims. We study the CO and the radio continuum emission in an active galaxy to analyze the interplay between the central activity and the molecular gas. Methods. We present new high-resolution observations of the (CO)-C-12(1-0) and (CO)-C-12(2-1) emission lines, and 3.5 cm and 20 cm radio continuum emission in the central region of the LINER/starburst galaxy NGC 6764. Results. The galaxy has an outflow morphology in radio continuum, spatially coincident with the CO and H alpha emission, and centered slightly off the radio continuum peak at the LINER nucleus. The total molecular gas mass in the center is about 7 x 10(8) M-circle dot, using a CO luminosity to total molecular gas conversion factor that is three times lower than the standard one. (CO)-C-12(1-0) emission is found near the boundaries of the radio continuum emission cone. The outflow has a projected expansion velocity of 25 km s(-1) relative to the systemic velocity of NGC 6764. About 4 x 10(6) M-circle dot of molecular gas is detected in the outflow. The approximate location (similar to 1 kpc) of the dynamical inner Lindblad resonance has been derived from the rotation curve. The peak of the CO emission is slightly (< 200 pc) off set from the peak of the radio continuum. Conclusions. The molecular gas has most likely been ejected by the stellar winds from the recent starburst, but the CO line ratios show indication of an interaction with the AGN. The energy released by the nuclear starburst is sufficient to explain the observed outflow, even if the data cannot exclude the AGN from being the major energy source. Comparison of the outflow with hydrodynamical simulations suggests that the nuclear starburst is 3-7 Myr old and the bubble-like outflow is still confined and not freely expanding. C1 Inst Radio Astron Milimetr, Granada, Spain. Univ Cologne, Inst Phys 1, D-5000 Cologne, Germany. CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA. Univ Turku, Tuorla Observ, Piikkio, Finland. Max Planck Inst Astron, D-6900 Heidelberg, Germany. Univ Toronto, Dept Astron, Toronto, ON, Canada. Leiden Univ, Dept Astron, Leiden, Netherlands. European So Observ, Santiago 19, Chile. RP Leon, S, Inst Radio Astron Milimetr, Granada, Spain. EM leon@iram.es NR 61 TC 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD OCT PY 2007 VL 473 IS 3 BP 747 EP 759 DI 10.1051/0004-6361:20066075 PG 13 SC Astronomy & Astrophysics GA 217OU UT ISI:000249958000014 ER PT J AU Cust, AE Slimani, N Kaaks, R van Bakel, M Biessy, C Ferrari, P Laville, M Tjonneland, A Olsen, A Overvad, K Lajous, M Clavel-Chapelon, F Boutron-Ruault, MC Linseisen, J Rohrmann, S Nothlings, U Boeing, H Palli, D Sieri, S Panico, S Tumino, R Sacerdote, C Skeie, G Engeset, D Gram, IT Quiros, JR Jakszyn, P Sanchez, MJ Larranaga, N Navarro, C Ardanaz, E Wirfalt, E Berglund, G Lundin, E Hallmans, G Bueno-de-Mesquita, HB Du, HD Peeters, PHM Bingham, S Khaw, KT Allen, NE Key, TJ Jenab, M Riboli, E AF Cust, Anne E. Slimani, Nadia Kaaks, Rudolf van Bakel, Marit Biessy, Carine Ferrari, Pietro Laville, Martine Tjonneland, Anne Olsen, Anja Overvad, Kim Lajous, Martin Clavel-Chapelon, Francoise Boutron-Ruault, Marie-Christine Linseisen, Jakob Rohrmann, Sabine Noethlings, Ute Boeing, Heiner Palli, Domenico Sieri, Sabina Panico, Salvatore Tumino, Rosario Sacerdote, Carlotta Skeie, Guri Engeset, Dagrun Gram, Inger Torhild Quiros, J. Ramon Jakszyn, Paula Sanchez, Maria Jose Larranaga, Nerea Navarro, Carmen Ardanaz, Eva Wirfalt, Elisabet Berglund, Goran Lundin, Eva Hallmans, Goeran Bueno-de-Mesquita, H. Bas Du, Huaidong Peeters, Petra H. M. Bingham, Shelia Khaw, Kay-Tee Allen, Naomi E. Key, Timothy J. Jenab, Mazda Riboli, Elio TI Dietary carbohydrates, glycemic index, glycemic load, and endometrial cancer risk within the European prospective investigation into cancer and nutrition cohort SO AMERICAN JOURNAL OF EPIDEMIOLOGY LA English DT Article DE cohort studies; diet; dietary carbohydrates; dietary fiber; endometrial neoplasms; glycemic index; insulin; nutrition assessment ID DIANA RANDOMIZED-TRIAL; IOWA WOMENS HEALTH; ENERGY-INTAKE; INSULIN SENSITIVITY; PHYSICAL-ACTIVITY; MEASUREMENT ERROR; C-PEPTIDE; IGF-I; FAT; FOODS AB The associations of dietary total carbohydrates, overall glycemic index, total dietary glycemic load, total sugars, total starch, and total fiber with endometrial cancer risk were analyzed among 288,428 women in the European Prospective Investigation into Cancer and Nutrition cohort (1992-2004), including 710 incident cases diagnosed during a mean 6.4 years of follow-up. Cox proportional hazards models were used to estimate relative risks and 95% confidence intervals. There were no statistically significant associations with endometrial cancer risk for increasing quartile intakes of any of the exposure variables. However, in continuous models calibrated by using 24-hour recall values, the multivariable relative risks were 1.61 (95% confidence interval: 1.06, 2.45) per 100 g/day of total carbohydrates, 1.40 (95% confidence interval: 0.99, 1.99) per 50 units/day of total dietary glycemic load, and 1.36 (95% confidence interval: 1.05, 1.76) per 50 g/day of total sugars. These associations were stronger among women who had never used postmenopausal hormone therapy compared with ever users (total carbohydrates P-heterogeneity = 0.04). Data suggest no association of overall glycemic index, total starch, and total fiber with risk, and a possible modest positive association of total carbohydrates, total dietary glycemic load, and total sugars with risk, particularly among never users of hormone replacement therapy. C1 Univ Sydney, Sch Publ Hlth, Sydney, NSW 2006, Australia. Int Agcy Res Canc, Nutr & Hormones Unit, F-69372 Lyon, France. Univ Lyon 1, Ctr Res Human Nutr Rhone Alpes, Lyon, France. German Canc Res Ctr, DKFZ, Div Canc Epidemiol, Heidelberg, Germany. INRA, UMR Inserm U449, Lyon, France. Danish Canc Soc, Inst Canc Epidemiol, Copenhagen, Denmark. Aarhus Univ, Dept Clin Epidemiol, Aalborg, Denmark. Univ Paris Sud, INSERM, ERI 20, EA 4045, Villejuif, France. Inst Gustave Roussy, Villejuif, France. Natl Inst Publ Hlth, Ctr Invest Populat Hlth, Cuernavaca, Morelos, Mexico. German Inst Human Nutr Potsdam Rehbrucke, Nuthetal, Germany. CSPO, Sci Inst Tuscany, Mol & Nutr Epidemiol Unit, Florence, Italy. NCI, Nutr Epidemiol Unit, Milan, Italy. Univ Naples Federico 2, Dept Clin & Expt Med, Naples, Italy. Azienda Osped Civil MP Arezzo, Canc registry, Ragusa, Italy. CPO Piemonte, Turin, Italy. Univ Tromso, Fac Med, Inst Community Med, Tromso, Norway. Publ Hlth & Hlth Planning Directorate, Asturias, Spain. Catalan Inst Oncol, Dept Epidemiol, Barcelona, Spain. Catalan Inst Oncol, Canc Registry, Barcelona, Spain. Andalusian Sch Publ Hlth, Granada, Spain. Publ Hlth Gipuzkoa, San Sebastian, Spain. Murcia Hlth Council, Dept Epidemiol, Murcia, Spain. Publ Hlth Inst Navarra, Pamplona, Spain. Lund Univ, Dept Clin Sci, Malmo, Sweden. Lund Univ, Dept Med, Malmo, Sweden. Umea Univ, Dept Med Biosci, Umea, Sweden. Umea Univ, Dept Publ Hlth & Clin Med, Umea, Sweden. Natl Inst Publ Hlth & Environm, Ctr Nutr & Hlth, NL-3720 BA Bilthoven, Netherlands. Univ Med Ctr, Julius Ctr Hlth Sci & Primary Care, Utrecht, Netherlands. MRC, Dunn Human Nutr Unit, Cambridge, England. Univ Cambridge, MRC, Ctr Nutr Epidemiol Canc Prevent Survival, Dept Publ Hlth & Primary Care, Cambridge, England. Univ Cambridge, Dept Publ Hlth & Primary Care, Cambridge, England. Univ Oxford, Canc Res, UK Epidemiol Unit, Oxford, England. Univ London Imperial Coll Sci Technol & Med, Dept Epidemiol & Publ Hlth, London, England. RP Cust, AE, Univ Sydney, Sch Publ Hlth, Level 2,K25 Med Fdn Bldg, Sydney, NSW 2006, Australia. EM annec@health.usyd.edu.au NR 63 TC 2 PU OXFORD UNIV PRESS INC PI CARY PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA SN 0002-9262 J9 AMER J EPIDEMIOL JI Am. J. Epidemiol. PD OCT 15 PY 2007 VL 166 IS 8 BP 912 EP 923 DI 10.1093/aje/kwm161 PG 12 SC Public, Environmental & Occupational Health GA 220FS UT ISI:000250143200008 ER PT J AU Ruiz-Velasco, AE Swan, H Troja, E Malesani, D Fynbo, JPU Starling, RLC Xu, D Aharonian, F Akerlof, C Andersen, MI Ashley, MCB Barthelmy, SD Bersier, D Ceron, JMC Castro-Tirado, AJ Gehrels, N Goegus, E Gorosabel, J Guidorzi, C Guver, T Hjorth, J Horns, D Huang, KY Jakobsson, P Jensen, BL Kiziloglu, U Kouveliotou, C Krimm, HA Ledoux, C Levan, AJ Marsh, T McKay, T Melandri, A Milvang-Jensen, B Mundell, CG O'Brien, PT Ozel, M Phillips, A Quimby, R Rowell, G Rujopakarn, W Rykoff, ES Schaefer, BE Sollerman, J Tanvir, NR Thone, CC Urata, Y Vestrand, WT Vreeswijk, PM Watson, D Wheeler, JC Wijers, RAMJ Wren, J Yost, SA Yuan, F Zhai, M Zheng, WK AF Ruiz-Velasco, A. E. Swan, H. Troja, E. Malesani, D. Fynbo, J. P. U. Starling, R. L. C. Xu, D. Aharonian, F. Akerlof, C. Andersen, M. I. Ashley, M. C. B. Barthelmy, S. D. Bersier, D. Ceron, J. M. Castro Castro-Tirado, A. J. Gehrels, N. Goegues, E. Gorosabel, J. Guidorzi, C. Guever, T. Hjorth, J. Horns, D. Huang, K. Y. Jakobsson, P. Jensen, B. L. Kiziloglu, Ue. Kouveliotou, C. Krimm, H. A. Ledoux, C. Levan, A. J. Marsh, T. McKay, T. Melandri, A. Milvang-Jensen, B. Mundell, C. G. O'Brien, P. T. Oezel, M. Phillips, A. Quimby, R. Rowell, G. Rujopakarn, W. Rykoff, E. S. Schaefer, B. E. Sollerman, J. Tanvir, N. R. Thoene, C. C. Urata, Y. Vestrand, W. T. Vreeswijk, P. M. Watson, D. Wheeler, J. C. Wijers, R. A. M. J. Wren, J. Yost, S. A. Yuan, F. Zhai, M. Zheng, W. K. TI Detection of GRB 060927 at z=5.47: Implications for the use of gamma-ray bursts as probes of the end of the dark ages SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; gamma rays : bursts (GRB 060927) ID HOST GALAXIES; LIGHT-CURVE; THEORETICAL IMPLICATIONS; COSMIC REIONIZATION; GRB AFTERGLOWS; COLUMN DENSITY; MILKY-WAY; REDSHIFT; SWIFT; EVOLUTION AB We report on follow-up observations of the gamma-ray burst GRB 060927 using the robotic ROTSE-IIIa telescope and a suite of larger aperture ground-based telescopes. An optical afterglow was detected 20 s after the burst, the earliest rest-frame detection of optical emission from any GRB. Spectroscopy performed with the VLT about 13 hr after the trigger shows a continuumbreak at lambda approximate to 8070 angstrom, produced by neutral hydrogen absorption at z approximate to 5.6. We also detect an absorption line at 8158 angstrom, which we interpret as Si II lambda 1260 at z = 5. 467. Hence, GRB 060927 is the second most distant GRB with a spectroscopically measured redshift. The shape of the red wing of the spectral break can be fitted by a damped Ly alpha profile with a column density with log (N-H/cm(-2)) = 22-50 +/- 0.15. We discuss the implications of thiswork for the use ofGRBs as probes of the end of the dark ages and draw threemain conclusions: (1) GRB afterglows originating from z less than or similar to 6 should be relatively easy to detect from the ground, but rapid near-infrared monitoring is necessary to ensure that they are found; (2) the presence of large H I column densities in some GRB host galaxies at z > 5 makes the use of GRBs to probe the reionization epoch via spectroscopy of the red damping wing challenging; and ( 3) GRBs appear crucial to locate typical star-forming galaxies at z > 5, and therefore the type of galaxies responsible for the reionization of the universe. C1 Univ Copenhagen, Neil Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark. Univ Guanajuato, Dept Astron, Guanajuato 36000, Mexico. Univ Michigan, Ann Arbor, MI 48109 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. INAF Ist Astrofis Spaz & Fis Cosm Sez Palermo, I-90146 Palermo, Italy. Univ Palermo, Sez Astron, Dipartimento Sci Fis & Astron, I-90134 Palermo, Italy. Max Planck Inst Kernphys, D-69117 Heidelberg, Germany. Inst Astrophys, D-14482 Potsdam, Germany. Univ New S Wales, Sch Phys, Dept Astrophys & Opt, Sydney, NSW 2052, Australia. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England. IAA CSIC, E-18080 Granada, Spain. Sabanci Univ, TR-34956 Istanbul, Turkey. INAF Osservatorio Astron Brera, I-23807 Merate, Italy. Istanbul Univ, Fac Sci, Dept Astron & Space Sci, TR-34119 Istanbul, Turkey. Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan. Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England. Middle E Tech Univ, TR-06531 Ankara, Turkey. NASA Marshall Space Flight Ctr, NSSTC, Huntsville, AL USA. Univ Space Res Assoc, Columbia, MD 21044 USA. European So Observ, Santiago 19, Chile. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Canakkale Onsekiz Mart Univ, TR-17020 Canakkale, Turkey. Univ Texas, Dept Astron, Austin, TX 78712 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Saitama Univ, Dept Phys, Sakura, Saitama 3388570, Japan. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. RP Ruiz-Velasco, AE, Univ Copenhagen, Neil Bohr Inst, Dark Cosmol Ctr, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark. NR 84 TC 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 2007 VL 669 IS 1 PN Part 1 BP 1 EP 9 PG 9 SC Astronomy & Astrophysics GA 224XB UT ISI:000250480600001 ER PT J AU Cartwright, JHE Montagne, R Piro, N Piro, O AF Cartwright, Julyan H. E. Montagne, Raul Piro, Nicolas Piro, Oreste TI Fronts between rhythms: Spatiotemporal dynamics of extended polyrhythmic media SO PHYSICAL REVIEW LETTERS LA English DT Article ID BIRHYTHMICITY; OSCILLATIONS; WAVE AB We study the propagation of fronts in extended oscillatory reaction-diffusion systems that contain several coexisting limit cycles. In contrast with the variational behavior, fronts between regions oscillating in two different limit cycles are found to propagate not necessarily towards the region of the less stable limit cycle, but towards the regions of the largest amplitudes, provided that the frequency mismatch between the cycles is sufficiently large. In other words, the smaller oscillations can always be made to control the whole system. C1 CSIC, Lab Estudios Cristalog, E-18100 Granada, Spain. Univ Fed Rio Grande do Norte, Dept Fis Teor & Expt, Natal, RN, Brazil. Mediterranean Technol Pk, Inst Ciencies Foton, Barcelona 08860, Spain. Univ Illes Balears, CSIC, Inst Mediterrani Estudis Avancats, E-07071 Palma de Mallorca, Spain. Rockefeller Univ, Ctr Studies Phys & Biol, New York, NY 10021 USA. RP Cartwright, JHE, CSIC, Lab Estudios Cristalog, E-18100 Granada, Spain. NR 17 TC 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD OCT 26 PY 2007 VL 99 IS 17 AR 174101 DI 10.1103/PhysRevLett.99.174101 PG 4 SC Physics, Multidisciplinary GA 225GV UT ISI:000250506000032 ER PT J AU Cammerer, SB Jimenez, C Jones, S Gros, L Lorente, SO Rodrigues, C Rodrigues, JCF Caldera, A Perez, LMR da Souza, W Kaiser, M Brun, R Urbina, JA Pacanowska, DG Gilbert, IH AF Cammerer, Simon B. Jimenez, Carmen Jones, Simon Gros, Ludovic Lorente, Silvia Orenes Rodrigues, Carlos Rodrigues, Juliany C. F. Caldera, Aura Perez, Luis Miguel Ruiz da Souza, Wanderley Kaiser, Marcel Brun, Reto Urbina, Julio A. Pacanowska, Dolores Gonzalez Gilbert, Ian H. TI Quinuclidine derivatives as potential antiparasitics del SO ANTIMICROBIAL AGENTS AND CHEMOTHERAPY LA English DT Article ID TRYPANOSOMA SCHIZOTRYPANUM CRUZI; SQUALENE SYNTHASE INHIBITOR; METHYL TRANSFERASE INHIBITORS; ERGOSTEROL BIOSYNTHESIS INHIBITORS; TRANSITION-STATE ANALOGS; DRUG-RESISTANT STRAINS; BIS-TRIAZOLE D0870; IN-VIVO ACTIVITIES; ULTRASTRUCTURAL ALTERATIONS; LEISHMANIA-AMAZONENSIS AB There is an urgent need for the development of new drugs for the treatment of tropical parasitic diseases such as Chagas' disease and leishmaniasis. One potential drug target in the organisms that cause these diseases is sterol biosynthesis. This paper describes the design and synthesis of quinuclidine derivatives as potential inhibitors of a key enzyme in sterol biosynthesis, squalene synthase (SQS). A number of compounds that were inhibitors of the recombinant Leishmania major SQS at submicromolar concentrations were discovered. Some of these compounds were also selective for the parasite enzyme rather than the homologous human enzyme. The compounds inhibited the growth of and sterol biosynthesis in Leishmania parasites. In addition, we identified other quinuclidine derivatives that inhibit the growth of Trypanosoma brucei (the causative organism of human African trypanosomiasis) and Plasmodium falciparum (a causative agent of malaria), but through an unknown mode(s) of action. C1 Cardiff Univ, Welsh Sch Pharm, Cardiff CF10 3XF, Wales. CSIC, Inst Parasitol & Biomed Lopez Neyra, Granada 18100, Spain. Univ Dundee, Sch Life Sci, Dundee DD1 5EH, Scotland. Inst Venezolano Invest Cient, Lab Quim Biol, Ctr Biofis & Bioquim, Caracas 1020, Venezuela. Univ Fed Rio de Janeiro, Inst Biofis Carlos Chagas Filho, Lab Ultraestrutura Celular Hertha Meyer, Ctr Ciencias Saude, BR-21949900 Rio De Janeiro, Brazil. Swiss Trop Inst, CH-4002 Basel, Switzerland. RP Gilbert, IH, Univ Dundee, Sch Life Sci, MSI WTB CIR Complex,Dow St, Dundee DD1 5EH, Scotland. EM i.h.gilbert@dundee.ac.uk NR 49 TC 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0066-4804 J9 ANTIMICROB AGENTS CHEMOTHER JI Antimicrob. Agents Chemother. PD NOV PY 2007 VL 51 IS 11 BP 4049 EP 4061 DI 10.1128/AAC.00205-07 PG 13 SC Microbiology; Pharmacology & Pharmacy GA 226UB UT ISI:000250612900036 ER PT J AU Abraham, J Abreu, P Aglietta, M Aguirre, C Allard, D Allekotte, I Allen, J Allison, P Alvarez, C Alvarez-Muniz, J Ambrosio, M Anchordoqui, L Andringa, S Anzalone, A Aramo, C Argiro, S Arisaka, K Armengaud, E Arneodo, F Arqueros, F Asch, T Asorey, H Assis, P Atulugama, BS Aublin, J Ave, M Avila, G Backer, T Badagnani, D Barbosa, AF Barnhill, D Barroso, SLC Bauleo, P Beatty, J Beau, T Becker, BR Becker, KH Bellido, JA BenZvi, S Berat, C Bergmann, T Bernardini, P Bertou, X Biermann, PL Billoir, P Blanch-Bigas, O Blanco, F Blasi, P Bleve, C Blumer, H Bohacova, M Bonifazi, C Bonino, R Boratav, M Brack, J Brogueira, P Brown, WC Buchholz, P Bueno, A Busca, NG Caballero-Mora, KS Cai, B Camin, DV Caruso, R Carvalho, W Castellina, A Catalano, O Cataldi, G Cazon-Boado, L Cester, R Chauvin, J Chiavassa, A Chinellato, JA Chou, A Chye, J Clark, PDJ Clay, RW Colombo, E Conceicao, R Connolly, B Contreras, F Coppens, J Cordier, A Cotti, U Coutu, S Covault, CE Creusot, A Cronin, J Dagoret-Campagne, S Daumiller, K Dawson, BR de Almeida, RM De Donato, C de Jong, SJ De la Vega, G de Mello, JM de Mello, JRT De Mitri, I de Souza, V del Peral, L Deligny, O Della Selva, A Delle Fratte, C Dembinski, H Di Giulio, C Diaz, JC Dobrigkeit, C D'Olivo, JC Dornic, D Dorofeev, A dos Anjos, JC Dova, MT D'Urso, D DuVernois, MA Engel, R Epele, L Erdmann, M Escobar, CO Etchegoyen, A San Luis, PF Falcke, H Farrar, G Fauth, AC Fazzini, N Fernandez, A Farrar, G Fauth, AC Fazzini, N Fernandez, A Ferrer, F Ferry, S Fick, B Filevich, A Filipcic, A Fleck, I Fonte, R Fracchiolla, CE Fulgione, W Garcia, B Gamez, DG Garcia-Pinto, D Garrido, X Geenen, H Gelmini, G Gemmeke, H Ghia, PL Giller, M Glass, H Gold, MS Golup, G Albarracin, FG Berisso, MG Herrero, RG Goncalves, P do Amaral, MG Gonzalez, D Gonzalez, JG Gonzalez, M Gora, D Gorgi, A Gouffon, P Grassi, V Grillo, A Grunfeld, C Guardincerri, Y Guarino, F Guedes, GP Gutierrez, J Hague, JD Hamilton, JC Hansen, P Harari, D Harmsma, S Harton, JL Haungs, A Hauschildt, T Healy, MD Hebbeker, T Heck, D Hojvat, C Holmes, VC Homola, P Horandel, J Horneffer, A Horvat, M Hrabovsky, M Huege, T Iarlori, M Insolia, A Ionita, F Italiano, A Kaducak, M Kampert, KH Keilhauer, B Kemp, E Kieckhafer, RM Klages, HO Kleifges, M Kleinfeller, J Knapik, R Knapp, J Koang, DH Kopmann, A Krieger, A Kromer, D Kumpel, D Kunka, N Kusenko, A La Rosa, G Lachaud, C Lago, BL Lebrun, D LeBrun, P Lee, J Leigui de Oliveira, MA Letessier-Selvon, A Leuthold, M Lhenry-Yvon, I Lopez, R Aguera, AL Bahilo, JL Maccarone, MC Macolino, C Maldera, S Malek, M Mancarella, G Mancenido, ME Mandat, D Mantsch, P Mariazzi, AG Maris, IC Martello, D Martinez, J Bravo, OM Mathes, HJ Matthiae, G Maurizio, D Mazur, PO McCauley, T McEwen, M McNeil, RR Medina, MC Medina-Tanco, G Meli, A Melo, D Menichetti, E Menschikov, A Meurer, C Meyhandan, R Micheletti, MI Miele, G Miller, W Mollerach, S Monasor, M Ragaigne, DM Montanet, F Morales, B Morello, C Moreno, E Moreno, JC Morris, C Mostafa, M Muller, MA Mussa, R Navarra, G Navarro, JL Navas, S Nellen, L Newman-Holmes, C Newton, D Thi, TN Nierstenhofer, N Nitz, D Nosek, D Nozka, L Oehlschlager, J Ohnuki, T Olinto, A Olmos-Gilbaja, VM Ortiz, M Ostapchenko, S Otero, L Selmi-Dei, DP Palatka, M Pallotta, J Parente, G Parizot, E Parlati, S Pastor, S Patel, M Paul, T Pavlidou, V Payet, K Pech, M Pekala, J Pelayo, R Pepe, IM Perrone, L Petrera, S Petrinca, P Petrov, Y Ngoc, DP Ngoc, DP Thi, TNP Pichel, A Piegaia, R Pierog, T Pimenta, M Pinto, T Pirronello, V Pisanti, O Platino, M Pochon, J Porter, TA Privitera, P Prouza, M Quel, EJ Rautenberg, J Reucroft, S Revenu, B Rezende, FAS Ridky, J Riggi, S Risse, M Riviere, C Rizi, V Roberts, M Robledo, C Rodriguez, G Frias, D Martino, JR Rojo, JR Rodriguez-Cabo, I Ros, G Rosado, J Roth, M Rouille-d'Orfeuil, B Roulet, E Rovero, AC Salamida, F Salazar, H Salina, G Sanchez, F Santander, M Santo, CE Santos, EM Sarazin, F Sarkar, S Sato, R Scherini, V Schieler, H Schmidt, F Schmidt, T Scholten, O Schovanek, P Schussler, F Sciutto, SJ Scuderi, M Segreto, A Semikoz, D Settimo, M Shellard, RC Sidelnik, I Siffert, BB Sigl, G De Grande, NS Smialkowski, A Smida, R Smith, AGK Smith, BE Snow, GR Sokolsky, P Sommers, P Sorokin, J Spinka, H Squartini, R Strazzeri, E Stutz, A Suarez, F Suomijarvi, T Supanitsky, AD Sutherland, MS Swain, J Szadkowski, Z Takahashi, J Tamashiro, A Tamburro, A Tascau, O Tcaciuc, R Thomas, D Ticona, R Tiffenberg, J Timmermans, C Tkaczyk, W Peixoto, CJ Tome, B Tonachini, A Torresi, D Travnicek, P Tripathi, A Tristram, G Tscherniakhovski, D Tueros, M Tunnicliffe, V Ulrich, R Unger, M Urban, M Galicia, JFV Valino, I Valore, L van den Berg, AM van Elewyck, V Vazquez, RA Veberic, D Veiga, A Velarde, A Venters, T Verzi, V Videla, M Villasenor, L Vorobiov, S Voyvodic, L Wahlberg, H Wainberg, O Waldenmaier, T Walker, P Warner, D Watson, AA Westerhoff, S Wieczorek, G Wiencke, L Wilczynska, B Wilczynski, H Wileman, C Winnick, MG Wu, H Wundheiler, B Xu, J Yamamoto, T Younk, P Zas, E Zavrtanik, D Zavrtanik, M Zech, A Zepeda, A Ziolkowski, M AF Abraham, J. Abreu, P. Aglietta, M. Aguirre, C. Allard, D. Allekotte, I. Allen, J. Allison, P. Alvarez, C. Alvarez-Muniz, J. Ambrosio, M. Anchordoqui, L. Andringa, S. Anzalone, A. Aramo, C. Argiro, S. Arisaka, K. Armengaud, E. Arneodo, F. Arqueros, F. Asch, T. Asorey, H. Assis, P. Atulugama, B. S. Aublin, J. Ave, M. Avila, G. Baecker, T. Badagnani, D. Barbosa, A. F. Barnhill, D. Barroso, S. L. C. Bauleo, P. Beatty, J. Beau, T. Becker, B. R. Becker, K. H. Bellido, J. A. BenZvi, S. Berat, C. Bergmann, T. Bernardini, P. Bertou, X. Biermann, P. L. Billoir, P. Blanch-Bigas, O. Blanco, F. Blasi, P. Bleve, C. Bluemer, H. Bohacova, M. Bonifazi, C. Bonino, R. Boratav, M. Brack, J. Brogueira, P. Brown, W. C. Buchholz, P. Bueno, A. Busca, N. G. Caballero-Mora, K. S. Cai, B. Camin, D. V. Caruso, R. Carvalho, W. Castellina, A. Catalano, O. Cataldi, G. Cazon-Boado, L. Cester, R. Chauvin, J. Chiavassa, A. Chinellato, J. A. Chou, A. Chye, J. Clark, P. D. J. Clay, R. W. Colombo, E. Conceicao, R. Connolly, B. Contreras, F. Coppens, J. Cordier, A. Cotti, U. Coutu, S. Covault, C. E. Creusot, A. Cronin, J. Dagoret-Campagne, S. Daumiller, K. Dawson, B. R. de Almeida, R. M. De Donato, C. de Jong, S. J. De La Vega, G. de Mello Junior, J. M. de Mello Neto, J. R. T. De Mitri, I. de Souza, V. del Peral, L. Deligny, O. Della Selva, A. Delle Fratte, C. Dembinski, H. Di Giulio, C. Diaz, J. C. Dobrigkeit, C. D'Olivo, J. C. Dornic, D. Dorofeev, A. dos Anjos, J. C. Dova, M. T. D'Urso, D. DuVernois, M. A. Engel, R. Epele, L. Erdmann, M. Escobar, C. O. Etchegoyen, A. San Luis, P. Facal Falcke, H. Farrar, G. Fauth, A. C. Fazzini, N. Fernandez, A. Farrar, G. Fauth, A. C. Fazzini, N. Fernandez, A. Ferrer, F. Ferry, S. Fick, B. Filevich, A. Filipcic, A. Fleck, I. Fonte, R. Fracchiolla, C. E. Fulgione, W. Garcia, B. Garcia Gamez, D. Garcia-Pinto, D. Garrido, X. Geenen, H. Gelmini, G. Gemmeke, H. Ghia, P. L. Giller, M. Glass, H. Gold, M. S. Golup, G. Gomez Albarracin, F. Gomez Berisso, M. Gomez Herrero, R. Goncalves, P. Goncalves do Amaral, M. Gonzalez, D. Gonzalez, J. G. Gonzalez, M. Gora, D. Gorgi, A. Gouffon, P. Grassi, V. Grillo, A. Grunfeld, C. Guardincerri, Y. Guarino, F. Guedes, G. P. Gutierrez, J. Hague, J. D. Hamilton, J. C. Hansen, P. Harari, D. Harmsma, S. Harton, J. L. Haungs, A. Hauschildt, T. Healy, M. D. Hebbeker, T. Heck, D. Hojvat, C. Holmes, V. C. Homola, P. Hoerandel, J. Horneffer, A. Horvat, M. Hrabovsky, M. Huege, T. Iarlori, M. Insolia, A. Ionita, F. Italiano, A. Kaducak, M. Kampert, K. H. Keilhauer, B. Kemp, E. Kieckhafer, R. M. Klages, H. O. Kleifges, M. Kleinfeller, J. Knapik, R. Knapp, J. Koang, D.-H. Kopmann, A. Krieger, A. Kroemer, O. Kuempel, D. Kunka, N. Kusenko, A. La Rosa, G. Lachaud, C. Lago, B. L. Lebrun, D. LeBrun, P. Lee, J. Leigui de Oliveira, M. A. Letessier-Selvon, A. Leuthold, M. Lhenry-Yvon, I. Lopez, R. Lopez Aguera, A. Lozano Bahilo, J. Maccarone, M. C. Macolino, C. Maldera, S. Malek, M. Mancarella, G. Mancenido, M. E. Mandat, D. Mantsch, P. Mariazzi, A. G. Maris, I. C. Martello, D. Martinez, J. Martinez Bravo, O. Mathes, H. J. Matthiae, G. Maurizio, D. Mazur, P. O. McCauley, T. McEwen, M. McNeil, R. R. Medina, M. C. Medina-Tanco, G. Meli, A. Melo, D. Menichetti, E. Menschikov, A. Meurer, Chr. Meyhandan, R. Micheletti, M. I. Miele, G. Miller, W. Mollerach, S. Monasor, M. Ragaigne, D. Monnier Montanet, F. Morales, B. Morello, C. Moreno, E. Moreno, J. C. Morris, C. Mostafa, M. Muller, M. A. Mussa, R. Navarra, G. Navarro, J. L. Navas, S. Nellen, L. Newman-Holmes, C. Newton, D. Thi, T. Nguyen Nierstenhoefer, N. Nitz, D. Nosek, D. Nozka, L. Oehlschlaeger, J. Ohnuki, T. Olinto, A. Olmos-Gilbaja, V. M. Ortiz, M. Ostapchenko, S. Otero, L. Selmi-Dei, D. Pakk Palatka, M. Pallotta, J. Parente, G. Parizot, E. Parlati, S. Pastor, S. Patel, M. Paul, T. Pavlidou, V. Payet, K. Pech, M. Pekala, J. Pelayo, R. Pepe, I. M. Perrone, L. Petrera, S. Petrinca, P. Petrov, Y. Ngoc, DiepPham Ngoc, DongPham Thi, T. N. Pham Pichel, A. Piegaia, R. Pierog, T. Pimenta, M. Pinto, T. Pirronello, V. Pisanti, O. Platino, M. Pochon, J. Porter, T. A. Privitera, P. Prouza, M. Quel, E. J. Rautenberg, J. Reucroft, S. Revenu, B. Rezende, F. A. S. Ridky, J. Riggi, S. Risse, M. Riviere, C. Rizi, V. Roberts, M. Robledo, C. Rodriguez, G. Rodriguez Frias, D. Rodriguez Martino, J. Rodriguez Rojo, J. Rodriguez-Cabo, I. Ros, G. Rosado, J. Roth, M. Rouille-d'Orfeuil, B. Roulet, E. Rovero, A. C. Salamida, F. Salazar, H. Salina, G. Sanchez, F. Santander, M. Santo, C. E. Santos, E. M. Sarazin, F. Sarkar, S. Sato, R. Scherini, V. Schieler, H. Schmidt, F. Schmidt, T. Scholten, O. Schovanek, P. Schuessler, F. Sciutto, S. J. Scuderi, M. Segreto, A. Semikoz, D. Settimo, M. Shellard, R. C. Sidelnik, I. Siffert, B. B. Sigl, G. De Grande, N. Smetniansky Smialkowski, A. Smida, R. Smith, A. G. K. Smith, B. E. Snow, G. R. Sokolsky, P. Sommers, P. Sorokin, J. Spinka, H. Squartini, R. Strazzeri, E. Stutz, A. Suarez, F. Suomijarvi, T. Supanitsky, A. D. Sutherland, M. S. Swain, J. Szadkowski, Z. Takahashi, J. Tamashiro, A. Tamburro, A. Tascau, O. Tcaciuc, R. Thomas, D. Ticona, R. Tiffenberg, J. Timmermans, C. Tkaczyk, W. Todero Peixoto, C. J. Tome, B. Tonachini, A. Torresi, D. Travnicek, P. Tripathi, A. Tristram, G. Tscherniakhovski, D. Tueros, M. Tunnicliffe, V. Ulrich, R. Unger, M. Urban, M. Valdes Galicia, J. F. Valino, I. Valore, L. van den Berg, A. M. van Elewyck, V. Vazquez, R. A. Veberic, D. Veiga, A. Velarde, A. Venters, T. Verzi, V. Videla, M. Villasenor, L. Vorobiov, S. Voyvodic, L. Wahlberg, H. Wainberg, O. Waldenmaier, T. Walker, P. Warner, D. Watson, A. A. Westerhoff, S. Wieczorek, G. Wiencke, L. Wilczynska, B. Wilczynski, H. Wileman, C. Winnick, M. G. Wu, H. Wundheiler, B. Xu, J. Yamamoto, T. Younk, P. Zas, E. Zavrtanik, D. Zavrtanik, M. Zech, A. Zepeda, A. Ziolkowski, M. CA Pierre Auger Collaboration TI Correlation of the highest-energy cosmic rays with nearby extragalactic objects SO SCIENCE LA English DT Article ID SPECTRUM AB Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 x 10(19) electron volts and the positions of active galactic nuclei (AGN) lying within similar to 75 megaparsecs. We rejected the hypothesis of an isotropic distribution of these cosmic rays with at least a 99% confidence level from a prescribed a priori test. The correlation we observed is compatible with the hypothesis that the highest-energy particles originate from nearby extragalactic sources whose flux has not been substantially reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources. C1 Univ Tecnol Nacl Reg Mendoza & San Rafael, RA-5500 Mendoza, Argentina. Lab Instrumentacao & Fis Expt Particulas, P-1000119 Lisbon, Portugal. Inst Super Tecn, P-1000119 Lisbon, Portugal. Univ Turin, Ist Fis Spazio Interplanetario, I-10125 Turin, Italy. Sez INFN, I-10125 Turin, Italy. Univ Catolica Bolivia, La Paz, Bolivia. Univ Paris 07, Lab AstroParticule & Cosmol, IN2P3, CNRS, F-75231 Paris 05, France. Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Inst Balseiro, UNCuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. NYU, New York, NY 10027 USA. Ohio State Univ, Columbus, OH 43210 USA. Benernerita Univ Autonoma Puebla, Puebla, Mexico. Univ Santiago de Compostela, E-15782 Santiago De Compostela, Spain. Sez INFN Napoli, I-80126 Naples, Italy. Northeastern Univ, Boston, MA 02115 USA. Univ Wisconsin, Milwaukee, WI 53201 USA. Ist Astrofis Spaziale & Fis Cosm Palermo, INAF, I-90146 Palermo, Italy. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Laquila, Italy. Univ Complutense Madrid, E-28040 Madrid, Spain. Forschungszentrum Karlsruhe, Inst Prozessdatenverarbeitung & Elekt, D-76021 Karlsruhe, Germany. Penn State Univ, University Pk, PA 16802 USA. Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris 05, France. Univ Paris 07, F-75252 Paris 05, France. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Pierre Auger So Observ, RA-5613 Mendoza, Argentina. Univ Siegen, D-57068 Siegen, Germany. Natl Univ La Plata, Inst Fis Plata, Consejo Nacl Invest Cient & Tecn, RA-1900 La Plata, Argentina. Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil. Univ Estadual Sudoeste Bahia, BR-45083900 Vitoria da Conquista, BA, Brazil. Colorado State Univ, Ft Collins, CO 80523 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Berg Univ Wuppertal, D-42097 Wuppertal, Germany. Columbia Univ, New York, NY 10027 USA. CNRS, IN2P3, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France. Univ Karlsruhe TH, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Univ Salento, I-73100 Lecce, Italy. Sez INFN, I-73100 Lecce, Italy. Max Planck Inst Radioastron, D-53121 Bonn, Germany. Univ Aquila, I-67010 Coppito, Aquila, Italy. Sez INFN, I-67010 Coppito, Aquila, Italy. Osserv Astrofis Arcetri, I-50125 Florence, Italy. Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England. Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany. Acad Sci Czech Republic, Inst Phys, CZ-18221 Prague 8, Czech Republic. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Pueblo, CO 81001 USA. Univ Granada, E-18071 Granada, Spain. Ctr Andaluz Fis Particulas Elementales, E-18071 Granada, Spain. Univ Minnesota, Minneapolis, MN 55455 USA. Univ Milan, I-20133 Milan, Italy. Sez INFN, I-20133 Milan, Italy. Univ Catania, I-95123 Catania, Italy. Sez INFN, I-95123 Catania, Italy. Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil. Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Michigan Technol Univ, Houghton, MI 49931 USA. Univ Leeds, Inst Integrated Informat Syst, Leeds LS2 9JT, W Yorkshire, England. Univ Adelaide, Adelaide, SA 5005, Australia. Comis Nacl Energia Atom, Ctr Atom Constituyentes, RA-1650 Buenos Aires, DF, Argentina. Radboud Univ Nijmegen, Inst Math Astrophys & Particle Phys, NL-6500 GL Nijmegen, Netherlands. Natl Inst Subatom Phys, NL-1009 DB Amsterdam, Netherlands. Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France. Univ Michoacana, Morelia 58040, Michoacan, Mexico. Case Western Reserve Univ, Cleveland, OH 44106 USA. Univ Nova Gorica, Lab Astroparticle Phys, SI-5000 Nova Gorica, Slovenia. Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil. Univ Alcala de Henares, Madrid 28801, Spain. Univ Paris 11, CNRS, IN2P3, Inst Phys Nucl, F-91898 Orsay, France. Univ Naples Federico 2, I-80126 Naples, Italy. Sez INFN, I-80126 Naples, Italy. Univ Roma II Tor Vergata, I-00133 Rome, Italy. Sez INFN, I-00133 Rome, Italy. Rhein Westfal TH Aachen Univ, Inst Phys 3 A, D-52056 Aachen, Germany. Univ Nacl Autonoma Mexico, Mexico City 01000, DF, Mexico. Louisiana State Univ, Baton Rouge, LA 70803 USA. Univ Hawaii, Honolulu, HI 96822 USA. ASTRON, NL-7990 AA Dwingeloo, Netherlands. Pontificia Univ Catolica, BR-22453500 Rio De Janeiro, Brazil. Univ Lodz, PL-90236 Lodz, Poland. Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil. Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, Mexico. PAN, Inst Nucl Phys, PL-31342 Krakow, Poland. Univ Estadual de Feira Santana, BR-44031460 Feira de Santana, Brazil. Univ Groningen, Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. Univ Fed ABC, BR-09210170 Santo Andre, SP, Brazil. Southern Univ, Baton Rouge, LA 70813 USA. Univ Utah, Salt Lake City, UT 84112 USA. Inst Nucl Sci & Technol, Hanoi, Vietnam. Charles Univ Prague, Inst Nucl & Particle Phys, CZ-18000 Prague 8, Czech Republic. Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain. Univ Fed Bahia, BR-40210340 Salvador, BA, Brazil. Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1128 Buenos Aires, DF, Argentina. Colorado Sch Mines, Golden, CO 80401 USA. Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England. Univ Nebraska, Lincoln, NE 68588 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Abraham, J, Pierre Auger So Observ, Avenida San Martin Norte 304, RA-5613 Mendoza, Argentina. EM auger_collaboration2@fnal.gov NR 23 TC 29 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD NOV 9 PY 2007 VL 318 IS 5852 BP 938 EP 943 DI 10.1126/science.1151154 PG 6 SC Multidisciplinary Sciences GA 229FM UT ISI:000250788500033 ER PT J AU Chou, MY Majewski, SR Cunha, K Smith, VV Patterson, RJ Martinez-Delgado, D Law, DR Crane, JD Munoz, RR Lopez, RG Geisler, D Skrutskie, MF AF Chou, Mei-Yin Majewski, Steven R. Cunha, Katia Smith, Verne V. Patterson, Richard J. Martinez-Delgado, David Law, David R. Crane, Jeffrey D. Munoz, Ricardo R. Lopez, Ramon Garcia Geisler, Doug Skrutskie, Michael F. TI A 2mass all-sky view of the sagittarius dwarf galaxy. V. Variation of the metallicity distribution function along the sagittarius stream SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : evolution; galaxies : interactions; Galaxy : halo; Local Group ID EXPLORING HALO SUBSTRUCTURE; GIANT BRANCH STARS; SPHEROIDAL GALAXY; RED GIANTS; MILKY-WAY; CHEMICAL-COMPOSITION; GALACTIC HALO; TIDAL STREAM; DARK-MATTER; VLT/UVES ABUNDANCES AB We present reliable measurements of the metallicity distribution function (MDF) at different points along the tidal stream of the Sagittarius (Sgr) dwarf spheroidal (dSph) galaxy, based on high- resolution, echelle spectroscopy of candidate M giant members of the Sgr system. The Sgr MDF is found to evolve significantly from a median [Fe/H] similar to -0.4 in the core to similar to-1.1 dex over a Sgr leading arm length representing similar to 2.5-3.0 Gyr of dynamical (i. e., tidal stripping) age. This is direct evidence that there can be significant chemical differences between current dSph satellites and the bulk of the stars they have contributed to the halo. Our results suggest that Sgr experienced a significant change in binding energy over the past several gigayears, which has substantially decreased its tidal boundary across a radial range over which there must have been a significant metallicity gradient in the progenitor galaxy. By accounting for MDF variation along the debris arms, we approximate the MDF Sgr would have had several gigayears ago. We also analyze the MDF of a moving group of M giants we previously discovered toward the north Galactic cap. These objects have the opposite radial velocities to the infalling Sgr leading arm stars there, and we propose that most of them represent Sgr trailing arm stars overlapping the Sgr leading arm in this part of the sky. If so, these trailing arm stars further demonstrate the strong MDF evolution within the Sgr stream. C1 Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA. Natl Opt Astron Observ, Tucson, AZ 85726 USA. Observ Nacl, Rio De Janeiro, Brazil. Inst Astrofis Andalucia, E-18080 Granada, Spain. CALTECH, Dept Astron, Pasadena, CA 91125 USA. Carnegei Observ, Pasadena, CA 91101 USA. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain. Univ Concepcion, Dept Fis, Concepcion, Chile. RP Chou, MY, Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA. EM mc6ss@virginia.edu srm4n@virginia.edu cunha@noao.edu vsmith@noao.edu rjp0i@virginia.edu rrm8f@virginia.edu drlaw@astro.caltech.edu crane@ociw.edu rrm8f@virginia.edu rgl@ll.iac.es doug@kukita.cfm.udec.cl mfs4n@virginia.edu NR 65 TC 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 20 PY 2007 VL 670 IS 1 PN Part 1 BP 346 EP 362 PG 17 SC Astronomy & Astrophysics GA 231QZ UT ISI:000250965400025 ER PT J AU Diaz-Rubio, E Tabernero, J Gomez-Espana, A Massuti, B Sastre, J Chaves, M Abad, A Carrato, A Queralt, B Reina, JJ Maurel, J Gonzalez-Flores, E Aparicio, J Rivera, F Losa, F Aranda, E AF Diaz-Rubio, Eduardo Tabernero, Jose Gomez-Espana, Auxiliadora Massuti, Bartomeu Sastre, Javier Chaves, Manuel Abad, Alberto Carrato, Alfredo Queralt, Bernardo Reina, Juan Jose Maurel, Joan Gonzalez-Flores, Encarnacion Aparicio, Jorge Rivera, Fernando Losa, Ferran Aranda, Enrique TI Phase III study of capecitabine plus oxaliplatin compared with continuous-infusion fluorouracil plus oxaliplatin as first-line therapy in metastatic colorectal cancer: Final report of the Spanish cooperative group for the treatment of digestive tumors trial SO JOURNAL OF CLINICAL ONCOLOGY LA English DT Article ID ORAL CAPECITABINE; COLON-CANCER; ADJUVANT TREATMENT; RANDOMIZED-TRIAL; LEUCOVORIN; 5-FLUOROURACIL; IRINOTECAN; CARCINOMA; BOLUS AB Purpose The aim of this phase III trial was to compare the efficacy and safety of capecitabine plus oxaliplatin (XELOX) versus Spanish-based continuous-infusion high-dose fluorouracil (FU) plus oxaliplatin (FUOX) regimens as first-line therapy for metastatic colorectal cancer (MCRC). Patients and Methods A total of 348 patients were randomly assigned to receive XELOX (oral capecitabine 1,000 mg/m(2) bid for 14 days plus oxaliplatin 130 mg/m(2) on day 1 every 3 weeks) or FUOX ( continuous-infusion FU 2,250 mg/m(2) during 48 hours on days 1, 8, 15, 22, 29, and 36 plus oxaliplatin 85 mg/m(2) on days 1, 15, and 29 every 6 weeks). Results There were no significant differences in efficacy between XELOX and FUOX arms, which showed, respectively, median time to tumor progression (TTP; 8.9 v 9.5 months; P = .153); median overall survival (18.1 v 20.8 months; P = .145); and confirmed response rate (RR; 37% v 46%; P = .539). The safety profile of the two regimens was similar, although there were lower rates of grade 3/4 diarrhea (14% v 24%) and grade 1/2 stomatitis (28% v 43%), and higher rates of grade 1/2 hyperbilirubinemia (37% v 21%) and grade 1/2 hand-foot syndrome (14% v 5%) with XELOX versus FUOX, respectively. Conclusion This randomized study shows a similar TTP of XELOX compared with FUOX in the first-line treatment of MCRC, although there was a trend for slightly lower RR and survival. XELOX can be considered as an alternative to FUOX. C1 Hosp Clin Univ San Carlos, Serv Oncol Med, Madrid 28040, Spain. Univ Barcelona, Hosp Vall Hebron, Barcelona, Spain. Hosp Clin Barcelona, Barcelona, Spain. Hosp Hosp, Barcelona, Spain. Hosp Reina Sofia, Cordoba, Argentina. Gen Hosp, Alicante, Spain. Hosp Virgen Rocio, Seville, Spain. Hosp Germans Trias & Pujol, Badalona, Spain. Hosp Univ Elche, Alicante, Spain. ICO, Girona, Spain. Hosp J Ramon Jimenez, Huelva, Spain. Hosp Virgen Nieves, Granada, Spain. Hosp Fe, Valencia, Spain. Hosp Marques Valdecilla, Santander, Spain. RP Diaz-Rubio, E, Hosp Clin Univ San Carlos, Serv Oncol Med, Madrid 28040, Spain. EM ediazrubio.hcsc@salud.madrid.org NR 26 TC 17 PU AMER SOC CLINICAL ONCOLOGY PI ALEXANDRIA PA 330 JOHN CARLYLE ST, STE 300, ALEXANDRIA, VA 22314 USA SN 0732-183X J9 J CLIN ONCOL JI J. Clin. Oncol. PD SEP 20 PY 2007 VL 25 IS 27 BP 4224 EP 4230 DI 10.1200/JCO.2006.09.8467 PG 7 SC Oncology GA 233EM UT ISI:000251073200014 ER PT J AU Granados-Baeza, MJ Gomez-Hernandez, N Mora, Y Delgado, MJ Romero, D Girard, L AF Granados-Baeza, Manuel J. Gomez-Hernandez, Nicolas Mora, Yolanda Delgado, Maria J. Romero, David Girard, Lourdes TI Novel reiterated Fnr-type proteins control the production of the symbiotic terminal oxidase cbb(3) in Rhizobium etli CFN42 SO MOLECULAR PLANT-MICROBE INTERACTIONS LA English DT Article ID GRAM-NEGATIVE BACTERIA; NITROGEN-FIXATION; BRADYRHIZOBIUM-JAPONICUM; SINORHIZOBIUM-MELILOTI; CYTOCHROME-OXIDASE; ESCHERICHIA-COLI; GENE; LEGUMINOSARUM; PHASEOLI; GENOME AB Symbiotic nitrogen-fixing bacteria express a terminal oxidase with a high oxygen affinity, the cbb3-type oxidase encoded by the fixNOQP operon. Previously, we have shown that, in Rhizobium etli CFN42, the repeated fixNOQP operons (fixNOQPd and fixNOQPf) have a differential role in nitrogen fixation. Only the fixNOQPd operon is required for the establishment of an effective symbiosis; microaerobic induction of this operon is under the control of at least three transcriptional regulators, FixKf, FnrNd, and FnrNchr, belonging to the Crp/Fnr family. In this work, we describe two novel Crp/Fnr-type transcriptional regulators (StoRd and StoRf, symbiotic terminal oxidase regulators) that play differential roles in the control of key genes for nitrogen fixation. Mutations either in stoRd or stoRf enhance the microaerobic expression of both fixNOQP reiterations, increasing also the synthesis of the cbb3-type oxidase in nodules. Despite their structural similarity, a differential role of these genes was also revealed, since a mutation in stoRd but not in stoRf enhanced both the expression of fixKf and the nitrogen-fixing capacity of R. etli CFN42. C1 Univ Nacl Autonoma Mexico, Programa Genom Func Procariotes, Cuernavaca 62271, Morelos, Mexico. Univ Nacl Autonoma Mexico, Ctr Ciencias Gen, Programa Ingn Genom, Cuernavaca 62271, Morelos, Mexico. CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18080 Granada, Spain. RP Girard, L, Univ Nacl Autonoma Mexico, Programa Genom Func Procariotes, Ap Postal 565-A, Cuernavaca 62271, Morelos, Mexico. EM girard@ccg.unam.mx NR 44 TC 0 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA SN 0894-0282 J9 MOL PLANT MICROBE INTERACTION JI Mol. Plant-Microbe Interact. PD OCT PY 2007 VL 20 IS 10 BP 1241 EP 1249 DI 10.1094/MPMI-20-10-1241 PG 9 SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Plant Sciences GA 241DQ UT ISI:000251637500008 ER PT J AU Humphrey, A Iwamuro, F Villar-Martin, M Binette, L Fosbury, R Alighieri, SD AF Humphrey, A. Iwamuro, F. Villar-Martin, M. Binette, L. Fosbury, R. Alighieri, S. di Serego TI UV and optical emission lines from the z similar to 2.6 radio galaxy 0828+193: spatially resolved measurements SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE galaxies : active; galaxies : evolution; galaxies : high-redshift; galaxies : ISM; galaxies : jets ID GALAXIES; SPECTROSCOPY; EVOLUTION; SHOCKS; GAS; SPECTROPOLARIMETRY; HALOES; MODEL AB We present an investigation into the spatial variation of the rest-frame ultraviolet (UV) and optical line and continuum emission along the radio axis of the z similar to 2.6 radio galaxy 0828+193, using long-slit spectra from the Keck II and Subaru telescopes. Line brightnesses, line ratios and electron temperatures are examined, and their relationship with the arm-length asymmetry of the radio source is also investigated. We find that on the side of the nucleus with the shortest radio lobe, the gas covering factor is higher, and the ionization parameter is lower. The contrasts in environmental density required to explain the asymmetries in the line brightness and the radio arm-length asymmetries are in fair agreement with each other. These results add further weight to the conclusion of McCarthy, van Breugel & Kapahi - lobe distance asymmetries in powerful radio sources are the result of an asymmetry in the environmental density. We also note that the brightness of both the UV and optical continuum emission shows a similar spatial asymmetry to that shown by the line emission. While the UV continuum asymmetry can be wholly explained by the expected asymmetry in the nebular continuum, the optical continuum asymmetry cannot. We argue that, at least at optical wavelengths, the starlight and/or the scattered light must also be strongly spatially asymmetric. C1 Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico. Kyoto Univ, Dept Astron, Kyoto 6068502, Japan. Inst Astrofis Andalucia, CSIC, Granada 18080, Spain. Space Telescope European Coordinat Facil, D-85748 Garching, Germany. Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy. RP Humphrey, A, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico. EM ahumphre@astroscu.unam.mx NR 29 TC 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2ZG, OXON, ENGLAND SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD DEC 21 PY 2007 VL 382 IS 4 BP 1729 EP 1737 DI 10.1111/j.1365-2966.2007.12463.x PG 9 SC Astronomy & Astrophysics GA 241QY UT ISI:000251672100028 ER PT J AU Villasante-Marcos, V Martinez-Ruiz, F Osete, ML Urrutia-Fucugauchi, J AF Villasante-Marcos, Victor Martinez-Ruiz, Francisca Luisa Osete, Maria Urrutia-Fucugauchi, Jaime TI Magnetic characterization of cretaceous-tertiary boundary sediments SO METEORITICS & PLANETARY SCIENCE LA English DT Article ID GULF-OF-MEXICO; NORTHEASTERN MEXICO; CHICXULUB IMPACT; SE SPAIN; GRAVITY FLOWS; NE MEXICO; EL-KEF; EVENT; SPINEL; EJECTA AB Rock magnetic properties across several K-T boundary sections have been investigated to reveal any possible magnetic signature associated with the remains of the impact event at the end of the Cretaceous. Studied sections' locations vary in distance to the Chicxulub structure from distal (Agost and Caravaca, Spain), through closer (ODP Hole 1049A, Blake Nose, North Atlantic), to proximal (El Mimbral and La Lajilla, Mexico). A clear magnetic signature is associated with the fireball layer in the most distal sections, consisting of a sharp increase in susceptibility and saturation isothermal remanent magnetization (SIRM), and a decrease in remanence coercivity. Magnetic properties in these sections point to a distinctive ferrimagnetic phase, probably corresponding to the reported Mg- and Ni-rich, highly oxidized spinels of meteoritic origin. At closer and proximal sections magnetic properties are different. Although there is an increase in susceptibility and SIRM associated with a rusty layer placed on top of the siliciclastic deposit in proximal sections, and with a similar limonitic layer on top of the spherule bed that defines the boundary at Blake Nose, the magnetic properties indicate a mixture of iron oxyhydroxides dominated by fine-grained goethite. Based on previous geochemical studies at Blake Nose and new geochemical and PGE abundance measurements performed in this work at El Mimbral, this goethite-rich layer can be interpreted as an effect of diagenetic remobilization and precipitation of Fe. There is not enough evidence to assert that this Fe concentration layer at proximal sections is directly related to deposition of fine meteoritic material. Magnetic, geochemical, and iridium data reject it as a primary meteoritic phase. C1 Univ Complutense Madrid, Lab Paleomagnetismo, Fac CC Fis, Dept Fis Tierra Astron & Astrofis, E-28040 Madrid, Spain. CSIC UGR, Inst Andaluz Ciencias Tierra, Fac Ciencias, Granada 18002, Spain. Univ Nacl Autonoma Mexico, Inst Geofis, Coyoacan 04510, DF, Mexico. RP Villasante-Marcos, V, Univ Complutense Madrid, Lab Paleomagnetismo, Fac CC Fis, Dept Fis Tierra Astron & Astrofis, Avda Complutense S-N, E-28040 Madrid, Spain. EM vicvilla@fis.ucm.es NR 65 TC 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 1086-9379 J9 METEORIT PLANETARY SCI JI Meteorit. Planet. Sci. PD SEP PY 2007 VL 42 IS 9 BP 1505 EP 1527 PG 23 SC Geochemistry & Geophysics GA 244MB UT ISI:000251868900004 ER PT J AU Vera, M Sierra, M Diez, M Sierra, C Martinez, A Martinez, FJ Aguilar, J AF Vera, M. Sierra, M. Diez, M. Sierra, C. Martinez, A. Martinez, F. J. Aguilar, J. TI Deforestation and land use effects on micromorphological and fertility changes in acidic rainforest soils in Venezuelan Andes SO SOIL & TILLAGE RESEARCH LA English DT Article DE land use effects; deforestation; micromorphological changes; fertility changes ID ORGANIC FARMING SYSTEMS; QUALITY AB With the aim of determining the impact on soil caused by deforestation and replacement by pasture in the rainforests of the Venezuelan Andes, three representative plots were selected: one under natural forest (F), another deforested (D), and the third one under pasture (P). The chemical analyses of the soils were complemented with a micromorphological study. The analysis of thin sections revealed major differences in the microstructure and porosity, as well as in the characteristics of the fine fraction and organic constituents, together with other pedological features, corroborating the different dynamics and types of soil in the natural or altered forest landscape. The change in soil use leads to the reorganization of the solid fraction, evidenced in the intensity of the processes of transference and accumulation of materials in the different soil horizons. The results confirm that the change in land use is determinant in the current fertility and evolution of the soils. The main consequences of the land-use change are: a change in the soil organic-matter cycle with a greater degree of maturation in the disturbed soils (C/N in Ah horizon: 28.5 (F); 19.8 (D); 18.4 (P)), in which moder humus from undisturbed forest soils transforms into an acidic mull in the anthropogenic disturbed ones; illuviation of organic matter and minerals appears to have occurred after deforestation (colour (dry-wet) in Ah-Bt1-Bt2 horizons: 3/2-2/2, 4/ 4-3/4, 4.5/4-3.5/4 (F); 5/4-4.5/4, 5/6-4/6, 5/6-4.5/6 (D); 4.5/4-4/3.5, 5/6-4/4, 5/6-4/4 (P)); the amount of kaolinite and the degree of browning increased gradually with deforestation; other changes observed (bioturbation, microstructure, porosity and distribution of organic constituents) may also be related to the different activity of the soil fauna in disturbed (oribatids) and undisturbed soils (worms). Thus the porosity changes in the following form: the percentage of packing voids in the surface samples decreases from a 80% in the forest soil to a 70% and 65% in deforested and pasture soils, respectively. Moreover in depth a dominance of channels in forest-soil porosity changes into an abundance of planar voids in the other two types of soils studied. (C) 2007 Elsevier B.V. All rights reserved. C1 Univ Granada, Dept Pedol & Agr Chem, E-18071 Granada, Spain. Univ Los Andes, Fac Forestry & Environm Sci, Inst Geog, Merida, Venezuela. Ctr Informac & Fomento Agrario, Granada, Spain. RP Sierra, M, Univ Granada, Dept Pedol & Agr Chem, Campus Fuentenueva, E-18071 Granada, Spain. EM msierra@ugr.es NR 52 TC 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-1987 J9 SOIL TILL RES JI Soil Tillage Res. PD DEC PY 2007 VL 97 IS 2 BP 184 EP 194 DI 10.1016/j.still.2007.09.015 PG 11 SC Soil Science GA 245YY UT ISI:000251975900006 ER PT J AU Amariles, P Lacampa, P Saez-Benito, L AF Amariles, Pedro Lacampa, Patricia Saez-Benito, Loreto TI Dosage adjustments in hepatic dysfunction SO AMERICAN JOURNAL OF HEALTH-SYSTEM PHARMACY LA English DT Letter C1 Univ Antioquia, Medellin 1226, Colombia. Pharm La Jolla, Zaragoza 50014, Spain. Res Grp Pharmaceut Care, Granada 18071, Spain. RP Amariles, P, Univ Antioquia, Medellin 1226, Colombia. EM pamaris@farmacia.udea.edu.co NR 5 TC 0 PU AMER SOC HEALTH-SYSTEM PHARMACISTS PI BETHESDA PA 7272 WISCONSIN AVE, BETHESDA, MD 20814 USA SN 1079-2082 J9 AMER J HEALTH-SYST PHARM JI Am. J. Health-Syst. Pharm. PD DEC 15 PY 2007 VL 64 IS 24 BP 2536 EP + DI 10.2146/ajhp070273 PG 2 SC Pharmacology & Pharmacy GA 246AP UT ISI:000251980200006 ER PT J AU Naredo, E Rodriguez, M Rodriguez-Heredia, JM Campos, C Medina, JA Giner, E Martnez, O Toyos, FJ Ruiz, T Ros, I Pujol, M Miquel, X Garcia, L Aznar, JJ Chamizo, E Paez, M Morales, P Rueda, A Tuneu, R Corominas, H Minguez, D Garrido, J Willisch, A Aragon, A Iglesias, G Valdazo, JP Vargas, C Calvo, J Mas, AJ Galindez, E Raya, E Diaz, C AF Naredo, E. Rodriguez, M. Rodriguez-Heredia, J. M. Campos, C. Medina, J. A. Giner, E. Martnez, O. Toyos, F. J. Ruiz, T. Ros, I. Pujol, M. Miquel, X. Garcia, L. Aznar, J. J. Chamizo, E. Paez, M. Morales, P. Rueda, A. Tuneu, R. Corominas, H. Minguez, D. Garrido, J. Willisch, A. Aragon, A. Iglesias, G. Valdazo, J. P. Vargas, C. Calvo, J. Mas, A. J. Galindez, E. Raya, E. Diaz, C. TI Validity, reliability and sensitivity to change of simplified power doppler ultrasonographic assessment of the effect of biological therapy on rheumatoid arthritis joint inflammation SO ANNALS OF THE RHEUMATIC DISEASES LA English DT Meeting Abstract C1 Hosp Severo Ochoa, Madrid, Spain. Complejo Hosp Ourense, Ourense, Ecuador. Hosp Univ Getafe, Madrid, Spain. Hosp Gen Univ Valencia, Valencia, Spain. Complejo Hosp Palencia, Palencia, Spain. Hosp Clin Univ Lozano Blesa, Zaragoza, Spain. Hosp Virgen Concha, Zamora, Ecuador. Hosp Univ Virgen Macarena, Seville, Spain. Hosp Sierrallana Torrelavega, Torrelavega, Ecuador. Hosp Son Llatzer, Palma de Mallorca, Spain. Fdn Sanitaria Igualada, Barcelona, Spain. Hosp Basurto, Basurto, Ecuador. Hosp Merida, Merida, Venezuela. Hosp Jerez, Jerez, Ecuador. Hosp Clin San Cecilio, Granada, Spain. Ctr Hosp & Policlin Manresa, Manresa, Ecuador. Hosp Santa Creu & Sant Pau, Barcelona, Spain. Complejo Hosp Ciudad Real, Ciudad Real, Spain. Univ Autonoma Madrid, Dept Methodol, Madrid, Spain. NR 0 TC 0 PU B M J PUBLISHING GROUP PI LONDON PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND SN 0003-4967 J9 ANN RHEUM DIS JI Ann. Rheum. Dis. PD JUL PY 2007 VL 66 SU Suppl. 2 BP 183 EP 183 PG 1 SC Rheumatology GA 261SU UT ISI:000253101100584 ER PT J AU Moreno, OM Gonzalez, CI Saaibi, DL Otero, W Badillo, R Martin, J Ramirez, G AF Moreno, Olga Maria Gonzalez, Clara Isabel Saaibi, Diego Luis Otero, William Badillo, Reynaldo Martin, Javier Ramirez, Gerardo TI Polymorphisms of IL-10 gene promoter and rheumatoid arthritis in a Colombian population SO BIOMEDICA LA Spanish DT Article DE interleukins; interleukin-10; polymorphism; genetic; arthritis; rheumatoid; polymorphism; single nucleotide. ID SYSTEMIC-LUPUS-ERYTHEMATOSUS; INTERLEUKIN-10 PRODUCTION; CYTOKINE PRODUCTION; SJOGRENS-SYNDROME; MENINGOCOCCAL DISEASE; ALLELE FREQUENCIES; JOINT DESTRUCTION; PERIPHERAL-BLOOD; MESSENGER-RNA; B-CELLS AB Introduction. Rheumatoid arthritis is an inflammatory disease driven by TH1 CD4(+) cells. Interleukin-10 is present in higher concentrations in serum and synovial fluid from patients with rheumatoid arthritis and has a marked anti-inflammatory activity. Furthermore, it is capable of stimulating B cells and increasing autoantibody production. Interleukin-10 synthesis is under genetic control. Objective. Three polymorphisms of the promoter region were analyzed for interleukin-10 genes -1082, -819 and -592. Subjects were patients with rheumatoid arthritis compared with a control population for these genes. Material and methods. One hundred two patients with rheumatoid arthritis and 102 matched healthy controls were studied. The following data were taken from the rheumatoid arthritis patients: age of disease onset, presence and titers of rheumatoid factor, and history of replacement joint surgery. Genotypes were obtained by polymerase chain reaction and sequence-specific primer method. The three polymorphisms are in strong linkage-disequilibrium and form three haplotypes -1082A/-819C/-592C, -1082A/-819T/-592A y -1082G/-819C/-592C. Results. No association was detected between Interleukin-10 alleles, haplotypes/genotypes and rheumatoid arthritis. No significant differences occurred between interleukin-10 polymorphisms and age of disease onset, presence and titer of rheumatoid factor and history of major joint replacement. Conclusions. Interleukin-10 is an important regulator of the immune response and likely plays a role in the pathogenesis of rheumatoid arthritis. The current results suggested that Interleukin10 promoter polymorphisms were not important for development or severity of rheumatoid arthritis. C1 Univ Ind Santander, Lab Inmunol & Biol Mol, Grp Inmunol & Epidemiol Mol GIEM, Fac Salud, Bucaramanga, Colombia. Ctr Med Carlos Ardila Lulle, Floridablanca, Colombia. Med Interna Clin, Floridablanca, Colombia. Hosp Univ Santander, Bucaramanga, Colombia. Univ Ind Santander, Dept Med Interna, Fac Salud, Bucaramanga, Colombia. Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. RP Moreno, OM, Univ Ind Santander, Lab Inmunol & Biol Mol, Grp Inmunol & Epidemiol Mol GIEM, Fac Salud, Bucaramanga, Colombia. NR 55 TC 0 PU INST NACIONAL SALUD PI BOGOTA D C PA AVENIDA CALLE 26 NO 51-60, APARTADO AEREO 80334 Y 80080, BOGOTA D C, 00000, COLOMBIA SN 0120-4157 J9 BIOMEDICA JI Biomedica PD MAR PY 2007 VL 27 IS 1 BP 56 EP 65 PG 10 SC Tropical Medicine GA 284RR UT ISI:000254724000006 ER PT J AU Santander, SP Cuellar, A Thomas, MD Guzman, F Gomez, A Lopez, MC Puerta, C AF Santander, Sandra Paola Cuellar, Adriana del Carmen Thomas, Maria Guzman, Fanny Gomez, Alberto Lopez, Manuel Carlos Puerta, Concepcion TI Expression of markers on dendritic cells from chronic chagasic patients stimulated with the KMP-11 protein and the K1 peptide from Trypanosoma cruzi SO BIOMEDICA LA Spanish DT Article DE Chagas disease; interleukin-12; Trypanosoma cruzi ID CD8(+) T-LYMPHOCYTES; IMMUNE-RESPONSE; MOLECULAR CHARACTERIZATION; COSTIMULATORY MOLECULES; MEMBRANE PROTEIN-11; HELICOBACTER-PYLORI; KMP11 ANTIGEN; CLASS-I; MATURATION; PROTECTION AB Introduction. The kinetoplastid membrane protein 11, KMP-11, from Trypanosoma cruzi elicits humoral and cellular immunity in mice that protects them from infection against further parasite challenge. Objective. To characterize the expression of surface markers on dendritic cells from chronic chagasic patients and healthy individuals, in response to the KMP-11 protein from Trypanosoma cruzi and its N-terminal pepticle K1. Materials and methods. Monocyte-derived dendritic cells from seven chronic chagasic patients and seven healthy individuals were stimulated with the KIMP-11 protein and the K1 peptide. Seven days after culturing, the CD83, CD86, and HLA-DR membrane expression as well as the production of cytokines were evaluated by flow cytometry. Results. Neither KMP-11 protein nor K1 peptide elicited the expression of the maturation marker CD83 on dendritic cells of patients or healthy control individuals. Dendritic cells from chronic chagasic patients exposed to K1 and LIPS at the same time presented a significant reduction in CD86 and CD83 membrane expression in contrast to the cells exposed to LPS alone, whereas dendritic cells from healthy individuals did not show this behavior. The secretion of interleukin-12 was decreased in the cultures of dendritic cells from chronic chagasic patients but not from healthy controls. Conclusions. KIVIP-11 protein does not affect the maturation of dendritic cells, but in the presence of LIDS the K1 peptide leads to a decreased expression of CD86 and CD83 as well as interleukin-12 production, This phenomenon may be associated with an impaired T cell stimulation. C1 Pontificia Univ Javeriana, Lab Parasitol Mol, Dept Microbiol, Bogota, DC, Colombia. Pontificia Univ Javeriana, Lab Immunobiol & Biol Celular, Dept Microbiol, Fac Ciencias, Bogota, DC, Colombia. CSIC, Dept Biol Mol, Inst Parasitol & Biomed Lopez Neyra, Granada, Spain. Univ Nacl Colombia, Fac Med, Bogota, DC, Colombia. Pontificia Univ Javeriana, Inst Genet Humana, Fac Med, Bogota, DC, Colombia. RP Puerta, C, Pontificia Univ Javeriana, Lab Parasitol Mol, Dept Microbiol, Bogota, DC, Colombia. EM cpuerta@javeriana.edu.co NR 39 TC 1 PU INST NACIONAL SALUD PI BOGOTA D C PA AVENIDA CALLE 26 NO 51-60, APARTADO AEREO 80334 Y 80080, BOGOTA D C, 00000, COLOMBIA SN 0120-4157 J9 BIOMEDICA JI Biomedica PD JAN PY 2007 VL 27 SU Suppl. 1 BP 18 EP 27 PG 10 SC Tropical Medicine GA 287ME UT ISI:000254920400003 ER PT J AU GIL, A SAITUA, MT CASSORLA, X DUQUE, C UAUY, R TI EFFECTS OF POSTNATAL AGE AND DIET ON PLASMA-LIPIDS SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 UNIV CHILE,INTA,SANTIAGO,CHILE. UNIASA,GRANADA,SPAIN. NR 0 TC 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PY 1984 VL 32 IS 2 BP A628 EP A628 PG 1 SC Medicine, Research & Experimental GA SJ725 UT ISI:A1984SJ72502886 ER PT J AU GIL, A SAITUA, MT CASSORLA, X DUQUE, C UAUY, R TI EFFECTS OF POSTNATAL AGE AND DIET ON PLASMA-LIPIDS SO AMERICAN JOURNAL OF CLINICAL NUTRITION LA English DT Meeting Abstract C1 UNIV CHILE,DUTA,SANTIAGO,CHILE. UNIASA,GRANADA,SPAIN. NR 0 TC 1 PU AMER SOC CLINICAL NUTRITION PI BETHESDA PA 9650 ROCKVILLE PIKE, SUBSCRIPTIONS, RM L-2310, BETHESDA, MD 20814-3998 SN 0002-9165 J9 AMER J CLIN NUTR JI Am. J. Clin. Nutr. PY 1984 VL 39 IS 4 BP 668 EP 668 PG 1 SC Nutrition & Dietetics GA SN601 UT ISI:A1984SN60100053 ER PT J AU GARRIDO, R GONZALEZ, SF ROLLAND, A HOBART, MA DECOCA, PL PENA, JH TI LIGHT VARIATIONS OF 28 ANDROMEDAE SO ASTRONOMY AND ASTROPHYSICS LA English DT Article C1 CSIC,INST ASTROFIS ANDALUCIA,APDO 2144,GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. NR 13 TC 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PY 1985 VL 144 IS 1 BP 211 EP 214 PG 4 SC Astronomy & Astrophysics GA AER29 UT ISI:A1985AER2900027 ER PT J AU MELNICK, J MOLES, M TERLEVICH, R TI THE SUPER STAR CLUSTER IN NGC-1705 SO ASTRONOMY AND ASTROPHYSICS LA English DT Letter C1 INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. UNIV CHILE,SANTIAGO,CHILE. ROYAL GREENWICH OBSERV,HAILSHAM BN27 1RP,E SUSSEX,ENGLAND. RP MELNICK, J, EUROPEAN SO OBSERV,KARL SCHWARZSCHILD STR 2,D-8046 GARCHING,FED REP GER. NR 21 TC 62 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PY 1985 VL 149 IS 2 BP L24 EP L26 PG 3 SC Astronomy & Astrophysics GA APN13 UT ISI:A1985APN1300002 ER PT J AU MELNICK, J TERLEVICH, R MOLES, M TI NEAR-INFRARED PHOTOMETRY OF VIOLENT STAR FORMATION REGIONS SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article C1 UNIV CHILE,SANTIAGO,CHILE. ROYAL GREENWICH OBSERV,HAILSHAM BN27 1RP,E SUSSEX,ENGLAND. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP MELNICK, J, EUROPEAN SO OBSERV,KARL SCHWARZSCHILD STR 2,D-8046 GARCHING,FED REP GER. NR 25 TC 14 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PY 1985 VL 11 IS 2 BP 91 EP 97 PG 7 SC Astronomy & Astrophysics GA AWP38 UT ISI:A1985AWP3800006 ER PT J AU BAEZ, ME GONZALEZ, C LACHICA, M TI LIFETIME OF PYROLYTIC GRAPHITE-TUBE ATOMIZERS IN MOLYBDENUM DETERMINATION SO ANALUSIS LA English DT Note C1 CSIC,ESTAC EXPTL ZAIDIN,GRANADA,SPAIN. RP BAEZ, ME, UNIV CHILE,FAC CIENCIAS QUIM & FARMACEUT,CASILLA 233,SANTIAGO,CHILE. NR 13 TC 4 PU EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER PI PARIS CEDEX 15 PA 141 RUE JAVEL, 75747 PARIS CEDEX 15, FRANCE SN 0365-4877 J9 ANALUSIS JI Analusis PD DEC PY 1985 VL 13 IS 10 BP 474 EP 476 PG 3 SC Chemistry, Analytical GA AWT74 UT ISI:A1985AWT7400007 ER PT J AU GORGE, JL LASTRA, O CHUECA, A LACHICA, M TI USE OF PHOTOSYNTHETIC PARAMETERS FOR THE DIAGNOSIS OF COPPER DEFICIENCY IN PINUS-RADIATA SEEDLINGS SO PHYSIOLOGIA PLANTARUM LA English DT Article C1 UNIV CHILE,FAC CIENCIAS BASICAS & FARMACEUT,SANTIAGO,CHILE. RP GORGE, JL, CSIC,ESTAC EXP ZAIDIN,APARTADO 419,E-18008 GRANADA,SPAIN. NR 27 TC 8 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0031-9317 J9 PHYSIOL PLANT JI Physiol. Plant. PD DEC PY 1985 VL 65 IS 4 BP 508 EP 512 PG 5 SC Plant Sciences GA AXU17 UT ISI:A1985AXU1700026 ER PT J AU TORRELLES, JM HO, PTP MORAN, JM RODRIGUEZ, LF CANTO, J TI AMMONIA OBSERVATIONS OF REGIONS WITH MOLECULAR OUTFLOWS SO ASTROPHYSICAL JOURNAL LA English DT Article C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP TORRELLES, JM, CSIC,INST ASTROFIS ANDALUCIA,APDO POSTAL 2144,E-18080 GRANADA,SPAIN. NR 70 TC 45 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 15 PY 1986 VL 307 IS 2 PN Part 1 BP 787 EP 794 PG 8 SC Astronomy & Astrophysics GA D8377 UT ISI:A1986D837700035 ER PT J AU ROLLAND, A PENA, JH DECOCA, PL PENICHE, R GONZALEZ, SF TI PERIOD CHANGES IN CY AQUARII SO ASTRONOMY AND ASTROPHYSICS LA English DT Article C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP ROLLAND, A, CSIC,INST ASTROFIS ANDALUCIA,APARTADO 2144,GRANADA,SPAIN. NR 21 TC 7 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 1986 VL 168 IS 1-2 BP 125 EP 129 PG 5 SC Astronomy & Astrophysics GA E7468 UT ISI:A1986E746800023 ER PT J AU GONZALEZ, C ESCOBAR, R LACHICA, M TI PINUS-RADIATA D-DON IN CHILE FERTILIZATION TRIALS WITH COPPER SO PLANT AND SOIL LA English DT Article C1 CSIC,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. RP GONZALEZ, C, UNIV CHILE,FAC CIENCIAS QUIM & FARMACEUT,SANTIAGO,CHILE. NR 10 TC 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0032-079X J9 PLANT SOIL JI Plant Soil PY 1987 VL 97 IS 2 BP 217 EP 222 PG 6 SC Agronomy; Plant Sciences; Soil Science GA F7719 UT ISI:A1987F771900007 ER PT J AU GEREMIA, RA CAVAIGNAC, S ZORREGUIETA, A TORO, N OLIVARES, J UGALDE, RA TI A RHIZOBIUM-MELILOTI MUTANT THAT FORMS INEFFECTIVE PSEUDONODULES IN ALFALFA PRODUCES EXOPOLYSACCHARIDE BUT FAILS TO FORM BETA-(1-]2) GLUCAN SO JOURNAL OF BACTERIOLOGY LA English DT Article C1 FAC CIENCIAS EXACT & NAT BUENOS AIRES,INST INVEST BIOQUIM FDN CAMPOMAR,RA-1405 BUENOS AIRES,ARGENTINA. CONSEJO NACL INVEST CIENT & TECN,RA-1405 BUENOS AIRES,ARGENTINA. CSIC,ESTAC EXPTL ZAIDIN,DEPT MICROBIOL,E-18008 GRANADA,SPAIN. NR 30 TC 88 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD FEB PY 1987 VL 169 IS 2 BP 880 EP 884 PG 5 SC Microbiology GA F8333 UT ISI:A1987F833300065 ER PT J AU CRISTIANI, S BABEL, J BARWIG, H CLAUSEN, JV GOUIFFES, C GUNTER, T HELT, BE HEYNDERICKX, D LOYOLA, P MAGNUSSON, P MONDEREN, P RABATTU, X SAUVAGEOT, JL SCHOEMBS, R SCHWARZ, H STEEMAN, F VAZ, LPR GIMENEZ, A TI PHOTOMETRY OF SN-1987A SO ASTRONOMY AND ASTROPHYSICS LA English DT Letter C1 ASTRON OBSERV,S-75120 UPPSALA,SWEDEN. UNIV PADUA,IST ASTRON,I-35100 PADUA,ITALY. OBSERV GENEVA,CH-1290 SAUVERNY,SWITZERLAND. UNIV LAUSANNE,INST ASTRON,CH-1015 LAUSANNE,SWITZERLAND. UNIV MUNICH STERNWARTE,D-8000 MUNICH 80,FED REP GER. COPENHAGEN UNIV OBSERV,DK-4340 TOLLOSE,DENMARK. UNIV STERNWARTE HAMBURG,D-2050 HAMBURG 80,FED REP GER. CATHOLIC UNIV LEUVEN,INST ASTRON,B-3000 LOUVAIN,BELGIUM. UNIV CHILE,SANTIAGO,CHILE. STERREWACHT LEIDEN,2300 RA LEIDEN,NETHERLANDS. UNIV FED MINAS GERAIS,BR-30000 BELO HORIZONTE,MG,BRAZIL. INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. RP CRISTIANI, S, EUROPEAN SO OBSERV,KARL SCHWARZSCHILD STR Z,D-8046 GARCHING,FED REP GER. NR 19 TC 16 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 1987 VL 177 IS 1-2 BP L5 EP L8 PG 4 SC Astronomy & Astrophysics GA H2175 UT ISI:A1987H217500003 ER PT J AU MELNICK, J MOLES, M TERLEVICH, R GARCIAPELAYO, JM TI GIANT H II REGIONS AS DISTANCE INDICATORS .1. RELATIONS BETWEEN GLOBAL PARAMETERS FOR THE LOCAL CALIBRATORS SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article C1 EUROPEAN SO OBSERV,D-8046 GARCHING,FED REP GER. OBSERV ASTRON NACL,GRANADA,SPAIN. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. ROYAL GREENWICH OBSERV,HAILSHAM BN27 1RP,E SUSSEX,ENGLAND. RP MELNICK, J, UNIV CHILE,SANTIAGO,CHILE. NR 69 TC 65 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUN 15 PY 1987 VL 226 IS 4 BP 849 EP 866 PG 18 SC Astronomy & Astrophysics GA H7318 UT ISI:A1987H731800005 ER PT J AU MELNICK, J MOLES, M TI ON THE ORIGIN OF THE DIPOLE ANISOTROPY OF THE COSMIC MICROWAVE BACKGROUND - BEYOND THE HYDRA-CENTAURUS SUPERCLUSTER SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article C1 OBSERV ASTRON NACL ESPANA,GRANADA,SPAIN. INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. RP MELNICK, J, EUROPEAN SO OBSERV,SANTIAGO,CHILE. NR 11 TC 36 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD MAY PY 1987 VL 14 IS 1 BP 72 EP 76 PG 5 SC Astronomy & Astrophysics GA J8087 UT ISI:A1987J808700011 ER PT J AU GONZALEZ, S SAREYAN, JP GARRIDO, R DELGADO, A CHAPELLIER, E TI LIGHT VARIATION AMPLITUDES OF THE TYPE BETA-CMA VARIABLE-STAR DELTA-CET SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA Spanish DT Article C1 OBSERV NICE,F-06300 NICE,FRANCE. INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. RP GONZALEZ, S, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 18 TC 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD MAY PY 1987 VL 14 IS 1 BP 391 EP 394 PG 4 SC Astronomy & Astrophysics GA J8087 UT ISI:A1987J808700093 ER PT J AU TORRELLES, JM HO, PTP RODRIGUEZ, LF CANTO, J MORAN, JM TI INTERACTION OF THE HIGH-DENSITY GAS WITH THE BIPOLAR OUTFLOW IN CEPHEUS-A SO ASTROPHYSICAL JOURNAL LA English DT Article C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP TORRELLES, JM, CSIC,INST ASTROFIS ANDALUCIA,APDO CORREOS 2144,E-18080 GRANADA,SPAIN. NR 16 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 15 PY 1987 VL 321 IS 2 PN Part 1 BP 884 EP 887 PG 4 SC Astronomy & Astrophysics GA K2110 UT ISI:A1987K211000024 ER PT J AU RODRIGUEZ, LF HASCHICK, AD TORRELLES, JM MYERS, PC TI WATER-VAPOR MASERS ASSOCIATED WITH YOUNG VISIBLE STARS SO ASTRONOMY AND ASTROPHYSICS LA English DT Note C1 HAYSTACK OBSERV,WESTFORD,MA 01886. INST ASTROFIS ANDALUCIA,E-19080 GRANADA,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP RODRIGUEZ, LF, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 14 TC 17 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 1987 VL 186 IS 1-2 BP 319 EP 321 PG 3 SC Astronomy & Astrophysics GA K9811 UT ISI:A1987K981100046 ER PT J AU GONZALEZ, SF ROLLAND, A GIMENEZ, A DECOCA, PL GARRIDO, R HOBART, MA PENA, JH TI PHOTOMETRIC VARIABILITY OF THE BINARY HD-1826 SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV COMPLUTENSE MADRID,DEPT ASTROFIS,E-28040 MADRID,SPAIN. UNIV VERACRUZANA,XALAPA,MEXICO. RP GONZALEZ, SF, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 17 TC 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD MAY PY 1987 VL 14 IS 2 BP 410 EP 413 PG 4 SC Astronomy & Astrophysics GA L1513 UT ISI:A1987L151300003 ER PT J AU GARRIDO, R GOMEZ, T PENICHE, R PENA, JH TI LZ HER - AN ECLIPSING BINARY STAR SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Meeting Abstract C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP GARRIDO, R, INST ASTROFIS ANDALUCIA,APARTADO POSTAL 2144,GRANADA,SPAIN. NR 1 TC 3 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD MAY PY 1987 VL 14 IS 2 BP 416 EP 416 PG 1 SC Astronomy & Astrophysics GA L1513 UT ISI:A1987L151300005 ER PT J AU ROLLAND, A DECOCA, PL HOBART, MA PENA, JH PARRAO, L TI PHOTOMETRIC-STUDY OF THE DELTA-SCUTI STAR DELTA-SERPENTIS SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article C1 UNIV VERACRUZANA,FAC FIS,XALAPA,VERACRUZ,MEXICO. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP ROLLAND, A, INST ASTROFIS ANDALUCIA,APARTADO POSTAL 2144,GRANADA,SPAIN. NR 0 TC 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD MAY PY 1987 VL 14 IS 2 BP 419 EP 419 PG 1 SC Astronomy & Astrophysics GA L1513 UT ISI:A1987L151300008 ER PT J AU SILVACOLOMER, J MOLINA, E FONOLLA, J BOZA, J TI DIGESTIBILITY OF ATRIPLEX-NUMMULARIA AND AACACIA-SALICINA IN GOATS SO ANNALES DE ZOOTECHNIE LA English DT Meeting Abstract C1 CSIC,ESTAC EXPTL ZAIDIN,DEPT FISIOL ANIM,E-18008 GRANADA,SPAIN. INST ARGENTINO INVEST ZONAS ARIDAS,CONSEJO NACL INVEST CIENT & TECN,MENDOZA,ARGENTINA. NR 0 TC 0 PU EDITIONS SCIENTIFIQUES ELSEVIER PI PARIS CEDEX 15 PA 141 RUE JAVEL, 75747 PARIS CEDEX 15, FRANCE SN 0003-424X J9 ANN ZOOTECH JI Ann. Zootech. PY 1987 VL 36 IS 3 BP 331 EP 332 PG 2 SC Agriculture, Dairy & Animal Science; Veterinary Sciences GA M3456 UT ISI:A1987M345600049 ER PT J AU PICCINI, D OCAMPO, JA BEDMAR, EJ TI POSSIBLE INFLUENCE OF RHIZOBIUM ON VA MYCORRHIZA METABOLIC-ACTIVITY IN DOUBLE SYMBIOSIS OF ALFALFA PLANTS (MEDICAGO-SATIVA L) GROWN IN A POT EXPERIMENT SO BIOLOGY AND FERTILITY OF SOILS LA English DT Article C1 CSIC,ESTAC EXPTL ZAIDIN,DEPT MICROBIOL,E-18008 GRANADA,SPAIN. UNIV NACL AGR SELVA,FAC AGRON,E-156 TINGOMARIA,PERU. NR 17 TC 4 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-2762 J9 BIOL FERT SOILS JI Biol. Fertil. Soils PY 1988 VL 6 IS 1 BP 65 EP 67 PG 3 SC Soil Science GA M4000 UT ISI:A1988M400000012 ER PT J AU LASTRA, O CHUECA, A LACHICA, M GORGE, JL TI ROOT UPTAKE AND PARTITION OF COPPER, IRON, MANGANESE, AND ZINC IN PINUS-RADIATA SEEDLINGS GROWN UNDER DIFFERENT COPPER SUPPLIES SO JOURNAL OF PLANT PHYSIOLOGY LA English DT Article C1 CSIC,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. RP LASTRA, O, UNIV CHILE,FAC CIENCIAS QUIM & FARMACEUT,CASILLA 223,SANTIAGO,CHILE. NR 36 TC 1 PU GUSTAV FISCHER VERLAG PI JENA PA VILLENGANG 2, D-07745 JENA, GERMANY SN 0176-1617 J9 J PLANT PHYSIOL JI J. Plant Physiol. PD FEB PY 1988 VL 132 IS 1 BP 16 EP 22 PG 7 SC Plant Sciences GA M6675 UT ISI:A1988M667500004 ER PT J AU MARCAIDE, JM TORRELLES, JM GUSTEN, R MENTEN, KM HO, PTP MORAN, JM RODRIGUEZ, LF TI OBSERVATIONAL EVIDENCE OF A POSSIBLE COLLIMATING AGENT OF THE HH1-2 OUTFLOW SO ASTRONOMY AND ASTROPHYSICS LA English DT Article C1 MAX PLANCK INST RADIOASTRON,D-5300 BONN 1,FED REP GER. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP MARCAIDE, JM, INST ASTROFIS ANDALUCIA,APDO POSTAL 2144,E-18080 GRANADA,SPAIN. NR 27 TC 18 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 1988 VL 197 IS 1-2 BP 235 EP 241 PG 7 SC Astronomy & Astrophysics GA N6164 UT ISI:A1988N616400037 ER PT J AU BAEZ, ME GONZALEZ, C LACHICA, M TI THE ASHING OF PLANT-MATERIAL - PROBLEMS ASSOCIATED WITH THE USE OF SILICA CRUCIBLES SO ANALUSIS LA English DT Article C1 CSIC,ESTAC EXPTL ZAIDIN,E-18080 GRANADA,SPAIN. RP BAEZ, ME, UNIV CHILE,FAC CIENCIAS QUIM & FARMACEUT,CASILLA 233,SANTIAGO,CHILE. NR 6 TC 1 PU EDITIONS SCIENTIFIQUES ELSEVIER PI PARIS CEDEX 15 PA 141 RUE JAVEL, 75747 PARIS CEDEX 15, FRANCE SN 0365-4877 J9 ANALUSIS JI Analusis PD MAY PY 1988 VL 16 IS 5 BP 300 EP 302 PG 3 SC Chemistry, Analytical GA N6725 UT ISI:A1988N672500007 ER PT J AU SARMIENTO, A HACYAN, S TI ENERGY-DENSITY SPECTRUM OF THE VACUUM AROUND A COSMIC STRING SO PHYSICAL REVIEW D LA English DT Note C1 INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP SARMIENTO, A, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70264,CD UNIV,MEXICO CITY 04510,DF,MEXICO. NR 27 TC 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD AUG 15 PY 1988 VL 38 IS 4 BP 1331 EP 1333 PG 3 SC Astronomy & Astrophysics; Physics, Particles & Fields GA P7952 UT ISI:A1988P795200039 ER PT J AU MAUERSBERGER, R HENKEL, C WILSON, TL OLANO, CA TI THE DETECTION OF CO IN A PROTO-PLANETARY NEBULA CLOSE TO THE GALACTIC-CENTER SO ASTRONOMY AND ASTROPHYSICS LA English DT Letter C1 IRAM,AVDA DIVINA PASTORA 7,NUCL CENT,E-18012 GRANADA,SPAIN. INST ARGENTINO RADIOSTIOASTRON,RA-1894 VILLA ELISA,ARGENTINA. MAX PLANCK INST RADIOASTRON,D-5300 BONN 1,FED REP GER. NR 25 TC 5 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 1988 VL 206 IS 2 BP L34 EP L36 PG 3 SC Astronomy & Astrophysics GA R0460 UT ISI:A1988R046000004 ER PT J AU TORRELLES, JM HO, PTP RODRIGUEZ, LF CANTO, J TI NH3 OBSERVATIONS OF THE AFGL 2591 REGION - A POSSIBLE CAVITY IN THE MOLECULAR CLOUD SO ASTROPHYSICAL JOURNAL LA English DT Article C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP TORRELLES, JM, INST ASTROFIS ANDALUCIA,APDO POSTAL 2144,E-18080 GRANADA,SPAIN. NR 24 TC 18 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 1989 VL 343 IS 1 PN Part 1 BP 222 EP 228 PG 7 SC Astronomy & Astrophysics GA AG978 UT ISI:A1989AG97800021 ER PT J AU CURIEL, S RODRIGUEZ, LF CANTO, J BOHIGAS, J ROTH, M TORRELLES, JM TI EXTENDED RADIO-CONTINUUM EMISSION ASSOCIATED WITH V645 CYG AND MWC1080 SO ASTROPHYSICAL LETTERS & COMMUNICATIONS LA English DT Article C1 UNIV MANCHESTER,DEPT ASTRON,MANCHESTER M13 9PL,LANCS,ENGLAND. CSIC,INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. RP CURIEL, S, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. NR 39 TC 55 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0888-6512 J9 ASTROPHYS LETT COMMUN JI Astrophys. Lett. Comm. PY 1989 VL 27 IS 5 BP 299 EP 309 PG 11 SC Astronomy & Astrophysics GA AN463 UT ISI:A1989AN46300002 ER PT J AU TORRELLES, JM HO, PTP RODRIGUEZ, LF CANTO, J VERDESMONTENEGRO, L TI VLA OBSERVATIONS OF AMMONIA AND CONTINUUM IN REGIONS WITH HIGH-VELOCITY GASEOUS OUTFLOWS .2. 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NR 22 TC 6 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD DEC PY 1989 VL 17 IS 2 BP 137 EP 141 PG 5 SC Astronomy & Astrophysics GA CF614 UT ISI:A1989CF61400011 ER PT J AU DULTZINHACYAN, D MOLES, M MASEGOSA, J TI THE ORIGIN OF THE 25-MU-M EMISSION IN SEYFERT 2 GALAXIES SO IAU SYMPOSIA LA English DT Article C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP DULTZINHACYAN, D, INST ASTROFIS ANDALUCIA,APDO 2144,E-18080 GRANADA,SPAIN. NR 10 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 J9 IAU SYMP PY 1989 IS 134 BP 422 EP 423 PG 2 SC Astronomy & Astrophysics GA DB065 UT ISI:A1989DB06500134 ER PT J AU CLAUSEN, JV GIMENEZ, A HELT, BE JENSEN, KS VAZ, LPR TI 4-COLOR PHOTOMETRY OF ECLIPSING BINARIES .31. LIGHT CURVES OF EM CARINAE SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article C1 INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV FED MINAS GERAIS,DEPT FIS ICEX,OBSERV ASTRON SERRA PIEDADE,BR-30161 BELO HORIZONTE,MG,BRAZIL. COPENHAGEN UNIV OBSERV,DK-1350 COPENHAGEN K,DENMARK. RP CLAUSEN, JV, COPENHAGEN UNIV OBSERV,BRORFELDEVEJ 23,DK-4340 TOLLOSE,DENMARK. NR 9 TC 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD FEB PY 1989 VL 77 IS 2 BP 257 EP 267 PG 11 SC Astronomy & Astrophysics GA U1064 UT ISI:A1989U106400006 ER PT J AU ANGLADA, G RODRIGUEZ, LF TORRELLES, JM ESTALELLA, R HO, PTP CANTO, J LOPEZ, R VERDESMONTENEGRO, L TI AMMONIA OBSERVATIONS OF OUTFLOW REGIONS SO ASTROPHYSICAL JOURNAL LA English DT Article C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. SOC CATALANA FIS,INST ESTUD CATALANS,ASTROFIS GRP,BARCELONA,SPAIN. RP ANGLADA, G, UNIV BARCELONA,DEPT FIS ATMOSFERA ASTRON & ASTROFIS,DIAGONAL 645,E-08028 BARCELONA,SPAIN. NR 73 TC 75 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 1 PY 1989 VL 341 IS 1 PN Part 1 BP 208 EP 219 PG 12 SC Astronomy & Astrophysics GA U7987 UT ISI:A1989U798700021 ER PT J AU TORRELLES, JM HO, PTP RODRIGUEZ, LF CANTO, J TI MONOCEROS-R2 - INTERACTIONS OF A MOLECULAR CLOUD CORE WITH A STELLAR WIND SO ASTROPHYSICAL JOURNAL LA English DT Article C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP TORRELLES, JM, INST ASTROFIS ANDALUCIA,APDO CORREOS 2144,E-18080 GRANADA,SPAIN. NR 39 TC 13 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1990 VL 349 IS 2 PN Part 1 BP 529 EP 537 PG 9 SC Astronomy & Astrophysics GA CL819 UT ISI:A1990CL81900017 ER PT J AU RODRIGUEZ, LF HO, PTP TORRELLES, JM CURIEL, S CANTO, J TI VLA OBSERVATIONS OF THE HERBIG-HARO 1-2 SYSTEM SO ASTROPHYSICAL JOURNAL LA English DT Article C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. CSIC INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP RODRIGUEZ, LF, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 30 TC 74 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 1990 VL 352 IS 2 PN Part 1 BP 645 EP 653 PG 9 SC Astronomy & Astrophysics GA CZ297 UT ISI:A1990CZ29700023 ER PT J AU GONZALEZLOPEZ, J SALMERON, V RAMOSCORMENZANA, A SILVACOLOMER, J BOZA, J TI INFLUENCE OF SEVERAL FEEDS ON BACTERIA IN SHEEP AND GOAT RUMEN LIQUOR INVITRO SO MICROBIOS LA English DT Article C1 CONSEJO NACL INVEST CIENT & TECN,IADIZA,MENDOZA,ARGENTINA. CSIC,ZAIDIN EXPTL STN,GRANADA,SPAIN. RP GONZALEZLOPEZ, J, UNIV GRANADA,FAC PHARM,DEPT MICROBIOL,E-18001 GRANADA,SPAIN. NR 16 TC 1 PU FACULTY PRESS PI CAMBRIDGE PA 88 REGENT ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1DP SN 0026-2633 J9 MICROBIOS JI Microbios PY 1990 VL 62 IS 251 BP 75 EP 81 PG 7 SC Microbiology GA DF619 UT ISI:A1990DF61900001 ER PT J AU GOMEZ, JF TORRELLES, JM TAPIA, M ROTH, M VERDESMONTENEGRO, L RODRIGUEZ, LF TI MORPHOLOGY AND KINEMATICS OF THE MOLECULAR CLOUD ASSOCIATED WITH GM-24 SO ASTRONOMY AND ASTROPHYSICS LA English DT Article C1 UNIV NACL AUTONOMA MEXICO,INST ASTRON,ENSENADA 22830,BAJA CALIFORNIA,MEXICO. CARNEGIE INST WASHINGTON,LAS CAMPANAS OBSERV,LA SERENA,CHILE. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP GOMEZ, JF, INST ASTROFIS ANDALUCIA,APDO CORREOS 2144,E-18080 GRANADA,SPAIN. NR 15 TC 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 1990 VL 234 IS 1-2 BP 447 EP 453 PG 7 SC Astronomy & Astrophysics GA DT494 UT ISI:A1990DT49400062 ER PT J AU CROVISIER, J DESPOIS, D BOCKELEEMORVAN, D GERARD, E PAUBERT, G JOHANSSON, LEB EKELUND, L WINNBERG, A GE, W IRVINE, WM KINZEL, WM SCHLOERB, FP TI A SEARCH FOR THE MILLIMETER LINES OF HCN IN COMETS WILSON-1987-VII AND MACHHOLZ-1988-XV SO ASTRONOMY AND ASTROPHYSICS LA English DT Article C1 OBSERV BORDEAUX,F-33270 FLOIRAC,FRANCE. IRAM,E-18012 GRANADA,SPAIN. CHALMERS UNIV TECHNOL,ONSALA SPACE OBSERV,S-43900 ONSALA,SWEDEN. EUROPEAN SO OBSERV,SEST PROJECT,SANTIAGO 19,CHILE. UNIV MASSACHUSETTS,FIVE COLL RADIO ASTRON OBSERV,AMHERST,MA 01003. RP CROVISIER, J, OBSERV PARIS,MEUDON SECT,F-92195 MEUDON,FRANCE. NR 14 TC 5 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 1990 VL 234 IS 1-2 BP 535 EP 538 PG 4 SC Astronomy & Astrophysics GA DT494 UT ISI:A1990DT49400069 ER PT J AU DULTZINHACYAN, D MASEGOSA, J MOLES, M TI IR TRACERS OF STAR FORMATION AND THE ORIGIN OF THE 25-MU-M EMISSION IN H-II GALAXIES SO ASTRONOMY AND ASTROPHYSICS LA English DT Article C1 INST ASTROFIS ANDALUCIA,APDO 2144,E-18080 GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. NR 79 TC 25 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD NOV PY 1990 VL 238 IS 1-2 BP 28 EP 38 PG 11 SC Astronomy & Astrophysics GA EH715 UT ISI:A1990EH71500005 ER PT J AU GARCIA, JM VAZ, LPR GIMENEZ, A TI A STUDY OF THE ALGUL-TYPE BINARY AS-VELORUM USING STROMGREN 4-COLOR PHOTOMETRY SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE PHOTOMETRY; STARS-BINARY AB We present a photometric study of the eclipsing binary AS Vel based on observations made at the European Southern Observatory (La Silla, Chile). C1 INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV FED MINAS GERAIS,DEPT FIS,BR-30161 BELO HORIZONTE,BRAZIL. RP GARCIA, JM, UNIV POLITECN MADRID,DEPT FIS,RONDA VALENCIA 3,E-28012 MADRID,SPAIN. NR 1 TC 0 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD NOV PY 1990 VL 21 IS SI BP 381 EP 381 PG 1 SC Astronomy & Astrophysics GA EM943 UT ISI:A1990EM94300082 ER PT J AU CLAUSEN, JV ANDERSEN, J GIMENEZ, A HELT, BE JENSEN, KS LINDGREN, H NORDSTROM, B REIPURTH, B VAZ, LPR TI 4-COLOR PHOTOMETRY OF ECLIPSING BINARIES .33. LIGHT CURVES OF TZ FORNACIS SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE PHOTOMETRY; STARS; BINARIES; CLOSE; STARS; INDIVIDUAL; TZ FOR; STARS; INDIVIDUAL; HR-970; STARS; INDIVIDUAL; HR-974; STARS; INDIVIDUAL; HR-990 ID STELLAR MASSES AB Complete uvby light curves are presented for the southern double-lined eclipsing binary TZ For. The light curves were obtained on 148 nights from 1976 through 1984 and contain 1175 points in each colour. TZ For consists of two evolved, but very well-separated, late-type stars (F7 III + G8 III) in a circular orbit (P = 75.d7). It allows the first determination of highly accurate absolute dimensions for a normal giant star and provides a unique opportunity for testing current theories of stellar and tidal evolution. A detailed study of TZ For, based on the present light curves, new high resolution spectra, and new radial velocity curves is published separately (Andersen et al. 1990). C1 COPENHAGEN UNIV OBSERV,DK-1350 COPENHAGEN K,DENMARK. EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. CTR ASTROPHYS,CAMBRIDGE,MA 02138. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV FED MINAS GERAIS,OBSERV ASTRON SERRA PIEDADE,DEPT FIS,IOBX,BR-30000 BELO HORIZONTE,MG,BRAZIL. RP CLAUSEN, JV, COPENHAGEN UNIV OBSERV,BRORFELDEVEJ 23,DK-4340 TOLLOSE,DENMARK. NR 18 TC 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD JUN PY 1991 VL 88 IS 3 BP 535 EP 544 PG 10 SC Astronomy & Astrophysics GA FP767 UT ISI:A1991FP76700008 ER PT J AU ANGLADA, G ESTALELLA, R RODRIGUEZ, LF TORRELLES, JM LOPEZ, R CANTO, J TI A DOUBLE RADIO-SOURCE AT THE CENTER OF THE OUTFLOW IN L723 SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, SOURCES; NEBULAE, INDIVIDUAL (L723); RADIO SOURCES, GENERAL; STARS, PRE; MAIN-SEQUENCE ID SOLAR NEIGHBORHOOD; CONTINUUM EMISSION; MOLECULAR OUTFLOWS; VLA OBSERVATIONS; IRAS 16293-2422; WIDE BINARIES; L1551 IRS-5; REGIONS; AMMONIA; SYSTEM AB We report the detection of a double radio source at the center of the L723 outflow complex. Whether the four-lobe structure of the outflow constitutes a single or two independent bipolar outflows is a matter of discussion. Our detection of two radio continuum sources, separated approximately 15", is suggestive of two outflows with two independent exciting sources. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP ANGLADA, G, UNIV BARCELONA,DEPT ASTRON & METEOROL,AV DIAGONA 647,E-08028 BARCELONA,SPAIN. NR 29 TC 31 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 1991 VL 376 IS 2 PN Part 1 BP 615 EP 617 PG 3 SC Astronomy & Astrophysics GA FY359 UT ISI:A1991FY35900022 ER PT J AU HELT, BE BIBO, EA CUYPERS, J DEBEHOGNE, H DECAMPOS, JA FRANCO, GAP GIMENEZ, A GRAY, RO LINDGREN, H LUNDSTROM, I MANFROID, J NG, YK OLSEN, EH PERNIER, B PETERSEN, CS VAZ, LPR VERSCHUEREN, W TI STROMGREN 6-COLOR PHOTOMETRY OF SN 1987 A .1. DAYS 1 TO 330 SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE SUPERNOVAE AND SUPERNOVA REMNANTS - SUPERNOVA 1987 A; PHOTOMETRY; GALAXIES - MAGELLANIC CLOUDS ID LARGE MAGELLANIC CLOUD; INTERSTELLAR EXTINCTION; SUPERNOVA 1987-A; NEUTRINO BURST; SN-1987A; 4-COLOR; SYSTEM; STARS; DUST AB We present intermediate and narrow band photometry of SN 1987 A. All observations are carried out at the Danish 0.5m telescope at European Southern Observatory (ESO), La Silla, and presented in the instrumental system. The bands in the Stromgren system are u (lambda-eff = 3505 angstrom, FWHM = 325 angstrom), v (4110 angstrom, 170 angstrom), b (4685 angstrom), 185 angstrom), y (5488 angstrom, 225 angstrom), beta-W, a wide H-beta filter (4864 angstrom, 135 angstrom), and beta-N, a narrow H-beta filter (4865 angstrom, 30 angstrom). Flux calibrations are derived for the first time for the H-beta passbands, and improved flux calibrations are given for the uvby passbands. C1 UNIV AMSTERDAM,STERRENKUDIG INST ANTON PANNEKOEK,1018 WB AMSTERDAM,NETHERLANDS. KONINKLIJKE STERRENWACHT,B-1180 BRUSSELS,BELGIUM. OBSERV ROYAL BELGIQUE,B-1180 BRUSSELS,BELGIUM. UNIV FED RIO JANEIRO,BR-20080 RIO DE JANEIRO,BRAZIL. INST ASTROFIS CANARIAS,E-18080 GRANADA,SPAIN. APPALACHIAN STATE UNIV,DEPT PHYS & ASTRON,BOONE,NC 28608. EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. INST ASTRON,S-22100 LUND,SWEDEN. UNIV LIEGE,INST ASTROPHYS,B-4200 COINTE OUGREE,BELGIUM. LEIDEN OBSERV,2300 RA LEIDEN,NETHERLANDS. COPENHAGEN UNIV OBSERV,DK-4340 TOLLOSE,DENMARK. OBSERV GENEVA,CH-1290 SAUVERNY,SWITZERLAND. UNIV ANTWERP,RIJKSUNIV CTR ANTWERP,ASTROPHYS RES GRP,B-2020 ANTWERP,BELGIUM. UNIV FED MINAS GERAIS,DEPT FIS ICEX,BR-30161 BELO HORIZONTE,MG,BRAZIL. RP HELT, BE, COPENHAGEN UNIV OBSERV,OSTER VOLDGADE 3,DK-1350 COPENHAGEN K,DENMARK. NR 32 TC 2 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD AUG PY 1991 VL 89 IS 2 BP 399 EP 409 PG 11 SC Astronomy & Astrophysics GA FY838 UT ISI:A1991FY83800011 ER PT J AU BAUJARD, P CASTILLO, P DOUCET, M MARTINY, B MOUNPORT, D NDIAYE, A TI INTRASPECIFIC AND INTERSPECIFIC VARIABILITY OF EXTERNAL CUTICULAR SYSTEMS IN THE GENUS AOROLAIMUS-SHER, 1963 (NEMATA, HOPLOLAIMIDAE) SO SYSTEMATIC PARASITOLOGY LA French DT Article AB Seven species in the genus Aorolaimus are studied with the stereoscan electron microscope: A. helicus, A. leiomerus, A. luci, A. macbethi, A. striatus, A. longistylus and A. perscitus. The results show that many characteristic cuticular features (form of the head, head constriction, prominence of labial disc, presence and number of longitudinal striations on basal lip annule, tail form, form of tail annules, presence of epiptygma, indentation of the bursa) are variable at specific level and cannot be used for specific characterization. Some other characters (number of lip annules, presence of areolations at phasmid level in lateral fields, ornamentation of lateral fields) show a low variability, are relatively constant in the genus, have limited use as identification criteria at the specific level, and help to separate species into groups. Study of the morphology of the epiptygma shows that this organ has a tubular structure which can be retracted and/or coiled into the vagina or protruded from the vulva to varying degrees, appearing in lateral optical section single when flattened or double when the tube is open. The synonymy of Peltamigratus and Nectopelta with Aorolaimus is confirmed. Eight new combinations are proposed: A. areolatus, A. levicaudatus, A. amazonensis, A. cerradoensis, A. raskii, A. paraensis, A. vigiae, A. banoae for species originally in Peltamigratus. A. intermedius is transferred to the genus Hoplolaimus as Hoplolaimus intermedius n. comb. The 32 species of the genus are placed in three groups according to (i) phasmid position, (ii) the presence of areolations at phasmid level in the lateral field, and (iii) the type of longitudinal ornamentations in the lateral fields. Morphological differences between the genera Scutellonema and Aorolaimus are discussed. C1 CTR INVEST & DESARROLLO AGR,E-18080 GRANADA,SPAIN. UNIV CHEIKH ANTA DIOP,DEPT BIOL ANIM,DAKAR,SENEGAMBIA. NATL UNIV CORDOBA,CTR ZOOL APLICADA,NEMATOL LAB,RA-5000 CORDOBA,ARGENTINA. RP BAUJARD, P, ORSTOM,NEMATOL LAB,DAKAR,SENEGAMBIA. NR 30 TC 3 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0165-5752 J9 SYST PARASITOL JI Syst. Parasitol. PD JUL PY 1991 VL 19 IS 3 BP 195 EP 213 PG 19 SC Parasitology GA GD462 UT ISI:A1991GD46200003 ER PT J AU TERLEVICH, R MELNICK, J MASEGOSA, J MOLES, M COPETTI, MVF TI A SPECTROPHOTOMETRIC CATALOG OF HII GALAXIES SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE GALAXIES - ACTIVE; EMISSION LINES; COMPACT ID EMISSION-LINE GALAXIES; H-II GALAXIES; VIOLENT STAR FORMATION; COMPLETE SAMPLE; PRISM SURVEY; LIST-V; REGIONS; QUASARS; SPECTROSCOPY; LUMINOSITY AB We present a spectrophotometric catalogue of 425 emission line galaxies discovered in objective prism surveys for which we derived redshifts, emission line intensities, equivalent widths, and absolute fluxes. The vast majority of objects in the catalogue are HII region-like galaxies (HII galaxies). In more than 80 HII galaxies the line [OIII]-lambda-4363 was measured with accuracy good enough to permit precise electron temperature determinations. The observational parameters that define the properties of HII galaxies as a class are characterized and discussed. C1 EUROPEAN SO OBSERV,CASILLA 19001,SANTIAGO 19,CHILE. ROYAL GREENWICH OBSERV,CAMBRIDGE CB3 0EZ,ENGLAND. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV FED SANTA MARIA,DEPT MATEMAT & NEPAE,BR-97119 SANTA MARIA,RS,BRAZIL. NR 41 TC 221 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD DEC PY 1991 VL 91 IS 2 BP 285 EP 324 PG 40 SC Astronomy & Astrophysics GA GP340 UT ISI:A1991GP34000009 ER PT J AU MAUPOME, L RODRIGUEZ, E HOBART, MA PENA, JH PENICHE, R TI PHOTOELECTRIC OBSERVATIONS OF W-UMA STARS - U-PEGASI AND AB-ANDROMEDAE SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE STARS-W URSAE MAJORIS; STARS-VARIABLE; STARS-ECLIPSING BINARIES AB Recent photoelectric-photometric data of the W UMa systems U Pegasi and AB Andromedae are reported. From the times of minima found in the literature and those obtained in the present paper, the following quadratic ephemerides were calculated: For U Peg: HJD(min) = 2436511.6706 (+/- 0.0035) + 0.3747818 +/- 1.27 x 10(-7)) E - 1.08 x 10(-10) (+/- 0.0324 x 10(-10)) (E2/2) and for AB And: HJD(min) = 2440128.7945 (+/- 0.0035) + 0.33189162 (+/- 9 x 10(-8)) E + 8.74 x 10(-11) (+/- 0.16 x 10(-11)) (E2/2); implying a continuous change in the period of -0.91 s/century for U Peg and 0.83 s/century for AB And. C1 UNIV VERACRUZ,FAC FIS,JALAPA,VERACRUZ,MEXICO. INST NACL ASTROFIS OPT & ELECTR,PUEBLA 72000,PUEBLA,MEXICO. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP MAUPOME, L, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 33 TC 6 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 1991 VL 22 IS 2 BP 235 EP 242 PG 8 SC Astronomy & Astrophysics GA GV405 UT ISI:A1991GV40500005 ER PT J AU ABE, O ABE, R ASAISHI, K ENOMOTO, K HATTORI, T INO, Y KIKUCHI, K KOYAMA, H SAWA, K UCHINO, J YOSHIDA, M HAYBITTLE, JL VANDEVELDE, T VERMORKEN, JB HARVEY, VJ HOLDAWAY, TM KAY, RG MASON, BH FORBES, JF BASTERT, G SAUERBREI, W SCHEURLEN, H SCHUMACHER, M FOCAN, C LOBELLE, JP PEEK, U OATES, GD POWELL, J DURAND, M MAURIAC, L GELMAN, RS HENDERSON, IC SHAPIRO, CL HANCOCK, AK JACKSON, S RAGAZ, J HENDERSON, IC KORZUN, A WOOD, WC YOSHIMOTO, M BAUM, M HOUGHTON, J HORGAN, K HUGHES, L STEWART, HJ GORDON, NH DAVIS, HL DELOZIER, T MACELESECH, J RAMBERT, P ANDRYSEK, O BARKMANOVA, J OWEN, JR HOWELL, A RIBEIRO, GC SWINDELL, R DEOLIVEIRA, CF CARSTENSEN, B PALSHOF, T JOHANSEN, H KORZENIOWSKI, S SKOLYSZEWSKI, J ANDERSEN, KW DOMBERNOWSKY, P MOURIDSEN, HT ROSE, C CORCORAN, N TRAMPISCH, HJ ABELOFF, MD CARBONE, PC GLICK, J GRAY, R TORMEY, DC BUYSE, M MIGNOLET, F PARIDAENS, R VANDRIEL, OJR SYLVESTER, RJ VANDEVELDE, CJH VANDONGEN, JA WELVAART, K SCANLON, EF SCHURMAN, S CATALANO, R CREECH, RH DESCHRYVER, A MCGREGOR, K YOSEF, HMA MCARDLE, CS SMITH, DC LARA, PC DENT, DM GUDGEON, CA HACKING, A BOCCARDO, F IZUO, M BENTLEY, A DORAN, Z FENTIMAN, IS HAYWARD, JL RUBENS, RD KAUFMANN, M JONAT, W SCHEURLEN, H VONFOURNIER, D KAUFMANN, M KLEFSTROM, P CUZICK, J MARGREITER, R ASSELAIN, B POUILLARD, P BAHI, J MILLA, A SANCHIZ, F CASTIGLIONE, M CAVALLI, F COLLINS, J GELBER, RD GOLDHIRSCH, A ISLEY, MR LINDTNER, J PRICE, KN RUDENSTAM, CM SENN, HJ BLISS, JM CHILVERS, CED COOMBES, RC MARTY, M BOROVIK, R BRUFMAN, G ROBINSON, E PANNUTI, F TAKASHIMA, S YASUTOMI, T HOLM, LE SONOO, H YAMASHITA, J BONTE, J BUZDAR, AU SMITH, T MARTIN, P ROMAIN, S AHMANN, D SCHAID, DJ HAKES, T NORTON, L WITTES, R FOROGLOU, P LISSAIOS, B BONADONNA, G DELVECCHIO, M VALAGUSSA, P VERONESI, U DUBOIS, JB BRUFMAN, G HAYAT, H BIANCO, AR LIPPMAN, ME PIERCE, LJ SIMON, R STEINBERG, SM NOMURA, Y DELAHUERTA, R SAINZ, MG BROWN, A FISHER, B REDMOND, C WOLMARK, N BAUM, M JACKSON, IM PALMER, MK INGLE, JN SCHAID, DJ BENGTSSON, NO LARSSON, LG LYTHGOE, JP SWINDELL, R KISSIN, M BLAMEY, RW MITCHELL, AK ROBERTSON, JFR CASTIGLIONE, M FLUCKIGER, H SENN, HJ NAKAMURA, Y MATHE, G MISSET, JL DESHPANDE, N DIMARTINO, L CLARKE, EA MCLAUGHLIN, JR CLARK, RM LEVINE, M MORIMOTO, K GUNDERSEN, S HAUERJENSEN, M HOST, H CROSSLEY, E DURRANT, K HARRIS, A CLARKE, M COLLINS, R GODWIN, J GRAY, R GREAVES, E HARWOOD, C MEAD, G PETO, R WHEATLEY, K HILL, C LACOUR, J LAPLANCHE, A LE, M SARRAZIN, D SEMIGLAZOV, V BROCKSCHMIDT, J COOPER, MR MEAKIN, JW PANZARELLA, T PRITCHARD, KI TREURNIETDONKER, AD VANPUTTEN, WLJ EASTON, D POWLES, TJ GAZET, JC DOUGLAS, P HACKING, A HOST, H LINDTNER, A NOTTER, G BRYANT, AJS EWING, GH KRUSHEN, JL NISSENMEYER, R FORREST, APM MCDONALD, C STEWART, HJ MOLLER, TR RYDEN, S CARSTENSEN, J HATSCHEK, T SODERBERG, M CARPENTER, JT CRAWLEY, J GREEN, S OSBORNE, CK RUTQVIST, LE WALLGREN, A BRENNER, H HERCBERGS, A DEBOER, G PATERSON, AHG PRITCHARD, KI NAJA, A REID, M SPITTLE, M SENANAYAKE, F MEIER, P TENGRUP, I TENNVALLNITTBY, L CAFFIER, H BEZWODA, WR HOLMBERG, L SEVELDA, P ZIELINSKY, CC JAKESZ, R BUCHANAN, RB CROSS, M DUNN, JA GILLESPIE KELLY, K MORRISON, JM LITTON, A CHLEBOWSKI, RT TI SYSTEMIC TREATMENT OF EARLY BREAST-CANCER BY HORMONAL, CYTOTOXIC, OR IMMUNE THERAPY - 133 RANDOMIZED TRIALS INVOLVING 31000 RECURRENCES AND 24000 DEATHS AMONG 75000 WOMEN .2. SO LANCET LA English DT Review ID REQUIRING PROLONGED OBSERVATION; SURGICAL ADJUVANT BREAST; TAMOXIFEN THERAPY; CHEMOTHERAPY; IRRADIATION; PATIENT; DESIGN; TUMORS C1 INTEGRAAL KANKERCTR,AMSTERDAM,NETHERLANDS. AUCKLAND BREAST CANC STUDY GRP,AUCKLAND,NETHERLANDS. AKAD WISSENSCH DDR,O-1086 BERLIN,GERMANY. BIRMINGHAM GEN HOSP,BIRMINGHAM,ENGLAND. FDN BERGONIE,F-33076 BORDEAUX,FRANCE. HARVARD UNIV,SCH MED,DANA FARBER CANC INST,BOSTON,MA 02115. BRADFORD ROYAL INFIRM,BRADFORD,ENGLAND. BRITISH COLUMBIA CANC FDN,VANCOUVER V5Z 3J3,BC,CANADA. CANC INST HOSP,TOKYO,JAPAN. CANC RES CAMPAIGN,LONDON,ENGLAND. CARDIFF SURG TRIALISTS,CARDIFF,WALES. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. CTR REG FRANCOIS BACLESSE,CAEN,FRANCE. CTR RENE HUGUENIN,ST CLOUD,FRANCE. CHARLES UNIV,CS-11636 PRAGUE 1,CZECHOSLOVAKIA. CHELTENHAM GEN HOSP,CHELTENHAM,ENGLAND. CHRISTIE HOSP & HOLT RADIUM INST,MANCHESTER M20 9BX,LANCS,ENGLAND. COIMBRA INST ONCOL,COIMBRA,PORTUGAL. DANISH CANC REGISTRY,COPENHAGEN,DENMARK. COPENHAGEN RADIUM CTR,COPENHAGEN,DENMARK. CRACOW INST ONCOL,KRAKOW,POLAND. ST LUKES HOSP,DUBLIN,IRELAND. UNIV DUSSELDORF,W-4000 DUSSELDORF 1,GERMANY. EUROPEAN ORG RES TREATMENT CANC,BRUSSELS,BELGIUM. EASTERN COOPERAT ONCOL GRP,BOSTON,MA. DANISH BREAST CANC COOPERAT GRP,COPENHAGEN,DENMARK. CANC & LEUKEMIA GRP B,BROOKLINE,MA. EVANSTON HOSP CORP,EVANSTON,IL 60201. FOX CHASE CANC INST,PHILADELPHIA,PA 19111. STATE UNIV GHENT HOSP,B-9000 GHENT,BELGIUM. GLASCOW BEATSON ONCOL CTR,GLASGOW,SCOTLAND. VICTORIA INFIRM,GLASGOW G42 9TY,SCOTLAND. GRANADA UNIV HOSP,GRANADA,SPAIN. GROOTE SCHUUR HOSP,CAPE TOWN 7925,SOUTH AFRICA. GUNMA UNIV,MAEBASHI,GUNMA 371,JAPAN. GUYS HOSP,LONDON SE1 9RT,ENGLAND. UNIV HEIDELBERG,W-6900 HEIDELBERG,GERMANY. UNIV HEIDELBERG 2,HEIDELBERG,GERMANY. UNIV HEIDELBERG 1,HEIDELBERG,GERMANY. DEACONESS MED CTR,HELSINKI,FINLAND. IMPERIAL CANC RES FUND,LONDON WC2A 3PX,ENGLAND. UNIV INNSBRUCK,A-6020 INNSBRUCK,AUSTRIA. INST CURIE,F-75231 PARIS 05,FRANCE. INST SALAH AZAIZ,TUNIS,TUNISIA. INST POLICLIN,BARCELONA,SPAIN. INT LUDWIG BREAST CANC STUDY GRP,LONDON,ENGLAND. CHARING CROSS HOSP,INT COLLABORAT CANC GRP,LONDON W6 8RP,ENGLAND. TECHNION ISRAEL INST TECHNOL,RAMBAM MED CTR,HAIFA,ISRAEL. KAROLINSKA HOSP,S-10401 STOCKHOLM 60,SWEDEN. KAWASAKI MED UNIV,KURASHIKI,OKAYAMA 70101,JAPAN. KUMAMOTO UNIV GRP,KUMAMOTO,JAPAN. ACAD HOSP ST RAFAEL,B-3000 LOUVAIN,BELGIUM. MD ANDERSON CANC CTR,HOUSTON,TX. LAB CANEROL BIOL APM,MARSEILLE,FRANCE. MAYO CLIN & MAYO FDN,ROCHESTER,MN 55905. MEM SLOAN KETTERING CANC CTR,NEW YORK,NY 10021. METAXAS MEM CANC HOSP,ATHENS,GREECE. IST NAZL STUDIO & CURA TUMORI,I-20133 MILAN,ITALY. CTR PAUL LAMARQUE,F-34033 MONTPELLIER,FRANCE. NAPLES UNIV,I-80138 NAPLES,ITALY. NCI,BETHESDA,MD 20892. NATL KYUSHU CANC CTR HOSP,KYUSHU,JAPAN. NATL MED CTR,MEXICO CITY,DF,MEXICO. NATL SURG ADJUVANT PROJECT BREAST & BOWEL CANC,PITTSBURGH,PA. N CENT CANC TREATMENT GRP,ROCHESTER,MN. NORTHWICK PK HOSP & CLIN RES CTR,HARROW HA1 3UJ,MIDDX,ENGLAND. NOTTINGHAM CITY HOSP,NOTTINGHAM NG5 1PB,ENGLAND. OITA PREFECTURAL HOSP,OITA,JAPAN. ONCOL HOSP A BUSINICO,SARDINIA,FRANCE. ONTARIO CANC TREATMENT & RES FDN,TORONTO,ONTARIO,CANADA. ONTARIO CLIN ONCOL GRP,TORONTO,ONTARIO,CANADA. OSAKA CITY MED SCH,OSAKA,JAPAN. OSLO RADIUM HOSP,OSLO,NORWAY. CHURCHILL HOSP,OXFORD OX3 7LJ,ENGLAND. IMPERIAL CANC RES FUND,MRC,CLIN TRIAL SERV UNIT,OXFORD,ENGLAND. INST GUSTAVE ROUSSY,F-94805 VILLEJUIF,FRANCE. NN PETROV ONCOL RES INST,LENINGRAD 188646,USSR. PIEDMONT ONCOL ASSOC,ATLANTA,GA. PRINCESS MARGARET HOSP,TORONTO M4X 1K9,ONTARIO,CANADA. ROTTERDAM RADIOTHERAPEUT INST,ROTTERDAM,NETHERLANDS. ROYAL MARSDEN HOSP,INST CANC RES,LONDON,ENGLAND. ST GEORGE HOSP,LONDON,ENGLAND. SASKATCHEWAN CANC FDN,SASKATOON,SASKATCHEWAN,CANADA. SW ONCOL GRP,KANSAS CITY,KS 66103. STOCKHOLM BREAST CANC STUDY GRP,STOCKHOLM,SWEDEN. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. TORONTO EDMONTON BREAST CANC STUDY GRP,TORONTO,ONTARIO,CANADA. TOULOUSE CTR CLAUDIUS REGAUD,TOULOUSE,FRANCE. UNIV CHICAGO,CHICAGO,IL 60637. UNIV LUND,S-22101 LUND,SWEDEN. UNIV WURZBURG,W-8700 WURZBURG,GERMANY. UNIV WITWATERSRAND,JOHANNESBURG 2001,SOUTH AFRICA. UPPSALA OREBRO CANC STUDY GRP,UPPSALA,SWEDEN. VIENNA UNIV HOSP,DEPT GYNAECOL 1,VIENNA,AUSTRIA. VIENNA UNIV HOSP,DEPT SURG 1,VIENNA,AUSTRIA. WESSEX RADIOTHERAPY CTR,WESSEX,ENGLAND. ADDENBROOKES HOSP,CAMBRIDGE CB2 2QQ,ENGLAND. RP ABE, O, RADCLIFFE INFIRM,NUFFIELD DEPT CLIN MED,ICRF MRC CLIN TRIAL SERV UNIT,OXFORD OX2 6HE,ENGLAND. NR 39 TC 738 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD JAN 11 PY 1992 VL 339 IS 8785 BP 71 EP 85 PG 15 SC Medicine, General & Internal GA GZ156 UT ISI:A1992GZ15600001 ER PT J AU MONZA, J DELGADO, MJ BEDMAR, EJ TI NITRATE REDUCTASE AND NITRITE REDUCTASE-ACTIVITY IN FREE-LIVING CELLS AND BACTEROIDS OF RHIZOBIUM-LOTI SO PLANT AND SOIL LA English DT Article DE BACTEROIDS; CYTOSOL; FREE-LIVING CELLS; LOTUS SP; NITRATE REDUCTASE; NITRITE REDUCTASE; RHIZOBIUM-LOTI ID ALFALFA ROOT-NODULES; NITROGEN-FIXATION; BRADYRHIZOBIUM-JAPONICUM; SOYBEAN NODULES; SENESCENCE; STRAINS AB Cells of Rhizobium loti strains T1 and U226 cultured in defined medium with glutamate as the only nitrogen source and bacteroids isolated from root nodules of Lottus corniculatus. L. pedunculatus and L. tenuis did not show constitutive (non-nitrate induced) nitrate reductase activity (NRA). In contrast, nitrite reductase activity (NiRA) was present in both free-living cells and bacteroids of either strain T1 or U226. Constitutive NRA and NiRA were detected in the cytosol fraction from nodules of all three symbioses examined. An induced NRA was expressed in bacteroids after a 10 h incubation in the presence of nitrate. C1 CSIC,DEPT MICROBIOL,ESTAC EXPTL ZAIDIN,POB 419,E-18080 GRANADA,SPAIN. FAC AGRON MONTEVIDEO,CATREDRA BIOQUIM,MONTEVIDEO,URUGUAY. NR 25 TC 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0032-079X J9 PLANT SOIL JI Plant Soil PD JAN PY 1992 VL 139 IS 2 BP 203 EP 207 PG 5 SC Agronomy; Plant Sciences; Soil Science GA HB322 UT ISI:A1992HB32200007 ER PT J AU GOPALKRISHNA GIRAUD, E MELNICK, J STEPPE, H TI A POWERFUL, ULTRA-STEEP SPECTRUM RADIO GALAXY HAVING AN EXTREMELY LOW-EXCITATION EMISSION-LINE SPECTRUM SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE GALAXIES; GALAXY MERGERS; GALAXIES, RADIO SOURCES; GALAXIES, EVOLUTION; COSMOLOGY ID RECENT STAR FORMATION; HIGH-REDSHIFT; EMITTING GAS; INTERACTING GALAXIES; MERGING GALAXIES; GALACTIC NUCLEI; IONIZED-GAS; ALIGNMENT; CATALOG; RADIOGALAXIES AB In the course of our optical follow up of the Ooty sample of ultra-steep spectrum radio sources (USSRS), we have discovered an exceptionally interesting case of a classical double radio source of size approximately 14" and spectral index alpha = -1.2 associated with a red galaxy at a modest redshift of z = 0.477. The galaxy exhibits gaseous wisps broadly coincident with the radio lobes. The optical spectrum is dominated by an emission line showing a very large rest-frame equivalent width of 350 angstrom, a spatial extent of approximately 10" at the position angle of the radio structure, and a tilt with a maximum rest-frame velocity difference of approximately 760 km s-1. These properties, as well as the presence of the optical wisps suggest that the system is a product of a merger involving a gas-rich disk and a massive elliptical. Even though the object is relatively bright (V = 21.3), additional spectral lines could only be detected after a persistent, deep integration. These very faint features, identified with H-beta, [O III] lambda-5007, and H, K and G-band, have lead to an unambiguous interpretation of the dominant emission line as being [O II] lambda-3727. The detection of faint lines may have considerable relevance to some cases of radio galaxies for which extremely large redshifts (z > 3) have been inferred recently. The red colour of the galaxy, and the equivalent widths of the stellar absorption features suggest that the continuum of 1411-192 is dominated by an old stellar population. The physical conditions of the gas are similar to those of LINERS, with shock-heating as a possible ionization mechanism. The association of an "ultra-soft" emission line spectrum with such a powerful radio galaxy is intriguing. C1 UNIV POONA,NCRA TIFR,POONA 411007,MAHARASHTRA,INDIA. EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. IRAM,E-18012 GRANADA,SPAIN. NR 73 TC 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD FEB PY 1992 VL 254 IS 1-2 BP 42 EP 48 PG 7 SC Astronomy & Astrophysics GA HC817 UT ISI:A1992HC81700018 ER PT J AU RODRIGUEZ, LF CANTO, J TORRELLES, JM GOMEZ, JF HO, PTP TI VLA IMAGING OF A POSSIBLE CIRCUMSTELLAR DISK AROUND HL TAURI SO ASTROPHYSICAL JOURNAL LA English DT Article DE PLANETS-AND SATELLITES, GENERAL; STARS, PRE-MAIN-SEQUENCE ID YOUNG STELLAR OBJECTS; OUTFLOWS; SPECTRA; CLOUDS; SYSTEM; STARS AB High-angular resolution (approximately 0".4) VLA observations of HL Tauri at 1.3 cm reveal the existence of an elongated structure (approximately 1"4 x 0.6, or - 200 x 80 AU at a distance of 140 pc) surrounding the star. The physical dimensions and the flux density of this source (2.9 +/- 0.4 mJy) suggest that the 1.3 cm emission arises from dust in a protoplanetary disk. However, the orientation of the major axis of the structure (position angle = 220-degrees +/- 4-degrees) with respect to the orientation of previously studied phenomena in the region does not allow a definitive determination of the nature of the object. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP RODRIGUEZ, LF, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 22 TC 21 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUL 1 PY 1992 VL 393 IS 1 PN Part 2 BP L29 EP L31 PG 3 SC Astronomy & Astrophysics GA HZ513 UT ISI:A1992HZ51300008 ER PT J AU ANGLADA, G RODRIGUEZ, LF CANTO, J ESTALELLA, R TORRELLES, JM TI RADIO-CONTINUUM FROM THE POWERING SOURCES OF THE RNO-43, HARO-4-255-FIR, B335, AND PV-CEPHEI OUTFLOWS AND FROM THE HERBIG-HARO OBJECT-32A SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL, (RNO-43, HARO-4-255 FIR, B335, PV-CEPHEI, HH-32A); ISM, JETS AND OUTFLOWS; RADIO CONTINUUM, INTERSTELLAR; STARS, PRE-MAIN-SEQUENCE ID T-TAURI STARS; MAIN-SEQUENCE OBJECTS; VLA OBSERVATIONS; MOLECULAR OUTFLOWS; EXCITING SOURCE; BIPOLAR OUTFLOW; DARK CLOUDS; YOUNG STARS; PROPER MOTIONS; DENSE CORES AB We report a sensitive VLA search for 3.6 cm continuum emission from the central regions of eight outflows. We detected continuum sources in RNO 43, Haro 4-255 FIR, B335, and PV Cephei that are probably associated with the powering sources of these bipolar outflows. For objects with low bolometric luminosity (L(bol) less-than-or-equal-to 100 L.), we find a marginal correlation between the momentum rate in the molecular outflow and the centimeter continuum luminosity, P is-proportional-to S(v) d2. This correlation is in agreement with models that explain the radio continuum emission as arising in shock-ionized gas in the surroundings of the powering source of the molecular outflow. We also detected radio continuum emission from the Herbig-Haro object 32A. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. INST ESTUDIOS CATALANS,SOC CATALANA FIS,ASTROFIS LAB,BARCELONA,SPAIN. RP ANGLADA, G, UNIV BARCELONA,DEPT ASTRON & METEOROL,AV DIAGONAL 647,E-08028 BARCELONA,SPAIN. NR 66 TC 59 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 20 PY 1992 VL 395 IS 2 PN Part 1 BP 494 EP 500 PG 7 SC Astronomy & Astrophysics GA JH628 UT ISI:A1992JH62800017 ER PT J AU QUIROGA, RJ CLARET, A TI SOME APPLICATIONS OF JACOBI DYNAMICS TO THE STELLAR EVOLUTION SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID LOW-MASS STARS AB This study compares computational results from stellar models and the evolutive behaviour of the stars, using elements of Jacobi dynamics. A linearized form of the Jacobi equation is used in order to analyze the dependency on the time of the coefficients alpha(t), beta(t) of the inner structure of the stars. With these coefficients and the stellar radii R(t) one can define all the dynamical parameters: the potential energy E(p)(t), the momentum of inertia I(t), the Jacobi function phi(t), and the amount of action A(c)(t). and the relations among them depending on the geometry of the problem. The computational models used here include pre-Main-Sequence stages and variations in the chemical composition X, Z. Since this is an introductory study, we only used the examples for 5 M., 1 M., and 0.6 M.. The results obtained are: (a) The Main Sequence represents a state of minimum action and potential energy where A(c)(t) and E(p)(t) are nearly invariant when compared to the variations of any other stellar parameter such as luminosity L(t), radius R(t), or the density rho(t) on which depends alpha(t), beta(t). (b) These parameters and the time of permanence of a star in the Main Sequence are, as expected, very sensitive to X, Z. But the parameters A(c), E(p) remain minimum and nearly invariant in the Main Sequence. The contractive and expansive phases associated with the pre- and post-Main-Sequence stages are also analysed. The scenario is not fundamentally altered if one includes rotational effects, taking the possible upper limits from observed rotations in T Tauri stars. (c) As a test for the theoretical criteria used here (and as a by-product with further applications) one has that the effective dynamical density rho(eff) = alpha-3-rho (mean stellar density) leads to an effective scale time for the thermal motions in the stellar interior P(eff) is-proportional-to rho(eff)-1/2 which is consistent with oscillation periods of pulsating stars not far from the Main Sequence such as delta-Scuti and beta-Cephei. The possibilities of further studies about stellar evolution using Jacobi dynamics are discussed. C1 INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. RP QUIROGA, RJ, UNIV FED MINAS GERAIS,DEPT FIS,BR-30000 BELO HORIZONTE,MG,BRAZIL. NR 11 TC 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PD JUL PY 1992 VL 193 IS 2 BP 185 EP 200 PG 16 SC Astronomy & Astrophysics GA JK266 UT ISI:A1992JK26600002 ER PT J AU QUIROGA, RJ CLARET, A TI THE STARS IN THE MAIN-SEQUENCE AND THEIR DYNAMIC PARAMETERS SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID CLOUDS AB The stars in the Main Sequence are seen as a hierarchy of objects with different masses M and effective dynamical radii R(eff) = R/alpha given by the stellar radii and the coefficients for the inner structure of the stars. As seen in a previous work (Paper I), during the lifetime in the Main Sequence R(eff)(t) remains a near invariant when compared to the variation in the time of R(t) and alpha(t). With such an effective R(eff) one obtains the amounts of action A(c)(M), the effective densities rho(eff)(M) = rho(M)alpha-3(M), the densities of action and of energy (or mean pressures in the stellar interior) a(c)(M), e(c)(M), and the potential energies E(p)(M). The amounts of action are A(c) is-proportional-to M(k) with k almost-equal-to 1.87 for the M stars, k almost-equal-to 5/3 for the KGF stars, and k almost-equal-to 1.83 for the A and earlier stars, representing very simple conditions for the other dynamical parameters. For instance k almost-equal-to 5/3 means a near invariant effective density rho(eff) for the KGF stars, while for such stars the mean densities and coefficients-alpha present the strongest variations with masses rho(M) is-proportional-to M-1.81 alpha(M) is-proportional-to M0.6. The cases for the M stars (e(c)(M) is-proportional-to M-1) and for the A and earlier stars (between a(c)(M) = constant and rho(eff)(M) is-proportional-to M-1) are also discussed. These conditions for the earlier stars also represent reasonable mean values for the whole stellar hierarchy in the range of masses 0.2 M. less-than-or-equal-to M less-than-or-equal-to 25 M.. With all this, one can build 'dynamical' HR diagrams with A(c)(M), E(p)(M), rho(eff)(M), etc., whose characteristics are analogous to these in the photometrical HR diagram. A comparison is made between A(c)(M) from the models here and the HR diagram with the best known stars of luminosity classes IV, V, and white dwarfs. The comparison of the potential energies E(p)(M) is-proportional-to M(-p) according to the stellar models used here and the observed frequency function psi(M) is-proportional-to M(-q) (number of stars in a given interval of masses) from different authors suggests the possibility that the product E(p)(M)psi(M) is a constant, but this must be confirmed with further studies of the function psi(M) and its fine structure. There are analogies between the formulation used here for the stellar hierarchy and other physical processes, for instance, in modified forms of the Kolmogorov law of turbulence and in the formulation used for the hierarchy of molecular clouds in gravitational equilibrium. Besides, the function of action A(c)(M) for the stars has analogous properties to the relations of angular momenta and masses J(M) for different types of objects. The cosmological implications of all this are discussed. C1 INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. RP QUIROGA, RJ, UNIV FED MINAS GERAIS,DEPT FIS,BR-30000 BELO HORIZONTE,MG,BRAZIL. NR 17 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PD JUL PY 1992 VL 193 IS 2 BP 235 EP 246 PG 12 SC Astronomy & Astrophysics GA JK266 UT ISI:A1992JK26600005 ER PT J AU GARCIAGARRIDO, JM CABELLO, MN GARCIAROMERA, I OCAMPO, JA TI ENDOGLUCANASE ACTIVITY IN LETTUCE PLANTS COLONIZED WITH THE VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGUS GLOMUS-FASCICULATUM SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article ID ALLIUM-PORRUM; CELL-WALL; ROOTS; HOST; SPECIFICITY; INFECTION; ENZYMES AB We studied the production of endoglucanase (EC 3.2.1.4) enzymes during the process of penetration and development of the vesicular-arbuscular (VA) mycorrhizal fungus Glomus fasciculatum in roots of lettuce (Lactuca sativa). Mycorrhizal plants showed more endoglucanase activity than non-mycorrhizal plants. Endoglucanse activity in VA-colonized plants increased at the beginning of the logarithmic stage of fungal development, and subsequently declined. The extracts from external mycelia of G. fasciculatum showed endoglucanase activity. Some of the endoglucanase activities detected in VA-colonized plant roots can be attributed to the VA fungus, since some of the endoglucanase proteins found in the external mycelia of G. fasciculatum and in mycorrhizal root extracts showed the same electrophoretic mobility. However, some of the endoglucanase activities from extracts of mycorrhizal plants had different electrophoretic mobilities than those observed in the external mycelia and in non-mycorrhizal plants. These results suggest that endoglucanases may be involved in the process of colonization of lettuce roots by G. fasciculatum. C1 ESTAC EXPTL ZAIDIN,DEPT MICROBIOL,PROF ALBAREDA 1,E-18008 GRANADA,SPAIN. INST SPEGAZZINI,RA-1900 LA PLATA,ARGENTINA. NR 20 TC 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD OCT PY 1992 VL 24 IS 10 BP 955 EP 959 PG 5 SC Soil Science GA JT440 UT ISI:A1992JT44000004 ER PT J AU RODRIGUEZ, E ROLLAND, A DECOCA, L GARRIDO, R GONZALEZBEDOLLA, SF TI STROMGREN PHOTOMETRY OF THE LOW AMPLITUDE DELTA-SCUTI STAR BETA-CASSIOPEIAE SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE STARS; VARIABLE; STARS; BETA SCU; PHOTOMETRY ID PULSATING STARS; CATALOG AB uvbybeta photometric observations of the delta Scuti type star beta Cassiopeiae are presented. Analysis of the data using both Fourier Transform and classical O-C methods establishes beta Cas as a monoperiodic pulsator with a period of 0.10091d. The physical parameters of this star are determined. The analysis of the phase shifts between observed light and colour variations suggests that beta Cas can be a nonradial pulsator, but a discrepant amplitude ratio DELTA (b - y)/DELTA y is observed. C1 UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP RODRIGUEZ, E, INST ASTROFIS ANDALUCIA,APARTADO 3004,E-18080 GRANADA,SPAIN. NR 30 TC 11 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD DEC PY 1992 VL 96 IS 3 BP 429 EP 434 PG 6 SC Astronomy & Astrophysics GA KG982 UT ISI:A1992KG98200001 ER PT J AU TORRELLES, JM RODRIGUEZ, LF CANTO, J HO, PTP TI A CIRCUMSTELLAR MOLECULAR GAS STRUCTURE ASSOCIATED WITH THE MASSIVE YOUNG STAR CEPHEUS-A-HW-2 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (CEPHEUS-A); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; H-II REGIONS ID OUTFLOWS; OBJECTS; TAURI; DISK AB We report the detection via VLA-D observations of ammonia of a circumstellar high-density molecular gas structure toward the massive young star related to the object Cepheus A-HW 2, a firm candidate for the powering source of the high-velocity molecular outflow in the region. This structure has a deconvolved angular size of 3.3'' x 2.3'' (p.a. = 22-degrees), or 2400 x 1700 AU at a distance of 725 pc. For this circumstellar molecular gas structure we derive an average column density N(H2) congruent-to 1 X 10(24)(X(NH3)/10(-8)) cm-2 , a volume density n(H-2) congruent-to 3 X 10(7)(X(NH3)/10(-8)) cm-3, and a mass M(H-2) congruent-to 2(X(NH3)/10(-8)) M.. The ammonia emission shows velocity variations of approximately 4 km s-1 across the condensation. HW 2 was previously reported to be a double radio source, separated by approximately 0.2'' (or 150 AU) with p.a. congruent-to 30-degrees-40-degrees. We suggest that the circumstellar molecular gas structure could be related to the circumstellar disk previously suggested from infrared, H2O, and OH maser observations. We consider as a plausible scenario that the double radio continuum source of HW 2 could represent the ionized inner part of the circumstellar disk, in the same way as proposed to explain the double radio source in L1551. The observed motions in the circumstellar molecular gas can be produced by bound motions (e.g., infall or rotation) around a central mass of approximately 10-20 M. (BO.5 V star or earlier). C1 UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP TORRELLES, JM, CSIC,INST ASTROFIS ANDALUCIA,CORREOS 3004,C SANCHO PANZA S-N,E-18080 GRANADA,SPAIN. NR 24 TC 15 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 1993 VL 404 IS 2 PN Part 2 BP L75 EP & PG 0 SC Astronomy & Astrophysics GA KL881 UT ISI:A1993KL88100011 ER PT J AU VALERO, MV AMADOR, LR GALINDO, C FIGUEROA, J BELLO, MS MURILLO, LA MORA, AL PATARROYO, G ROCHA, CL ROJAS, M APONTE, JJ SARMIENTO, LE LOZADA, DM CORONELL, CG ORTEGA, NM ROSAS, JE ALONSO, PL PATARROYO, ME TI VACCINATION WITH SPF66, A CHEMICALLY SYNTHESIZED VACCINE, AGAINST PLASMODIUM-FALCIPARUM MALARIA IN COLOMBIA SO LANCET LA English DT Article ID ASEXUAL BLOOD STAGES; SYNTHETIC VACCINE; PROTECTIVE IMMUNITY; OWL MONKEYS; ANTIGENS; PROTEIN; ANTIBODIES; INDUCTION; PEPTIDES AB Preclinical and clinical studies have established the safety and immunogenicity of the chemically synthesised SPf66 malaria vaccine. The present study is a phase III randomised, double-blind, placebo-controlled, efficacy trial completed in La Tola, Colombia. 1548 volunteers over one year of age received three doses of either the vaccine (n = 738) or placebo (n = 810). Active and passive case detection methods were used to document clinical episodes of malaria among the study population. The follow-up period began one month after the third dose and lasted for one year. 168 and 297 episodes of Plasmodium falciparum malaria were documented in the SPf66 group and the placebo group, respectively; this corresponds to a crude protective efficacy of 38.8%. Incidence rates for first or only P falciparum malarial episodes were 22.3% per annum among the vaccinee group and 33.5% among the placebo group (RR = 1.5; 95% Cl 1.23, 1.84). Therefore, the protective efficacy of SPf66 against first or only episodes was 33.6% (95% Cl 18.8, 45.7), being highest in children aged 1-4 years (77%) and adults older than 45 years (67%). The estimated protective efficacy against second episodes was 50.5% (95% Cl 12.9-71.9). Our study shows that the chemically synthesised SPf66 malaria vaccine is safe, immunogenic, and protective against P falciparum malaria in semi-immune populations subject to natural challenge. C1 NATL UNIV COLOMBIA,HOSP SAN JUAN DE DIOS,INST IMMUNOL,BOGOTA,COLOMBIA. HOSP CLIN BARCELONA,FUNDACIO RECERCA BIOMED,BARCELONA,SPAIN. CSIC,INST PARASITOL LOPEZ NEYRA,GRANADA,SPAIN. NR 40 TC 144 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD MAR 20 PY 1993 VL 341 IS 8847 BP 705 EP 710 PG 6 SC Medicine, General & Internal GA KT362 UT ISI:A1993KT36200001 ER PT J AU PASTORI, GM TRIPPI, VS TI ANTIOXIDATIVE PROTECTION IN A DROUGHT-RESISTANT MAIZE STRAIN DURING LEAF SENESCENCE SO PHYSIOLOGIA PLANTARUM LA English DT Article DE ANTIOXIDANT ENZYMES; MAIZE; OXIDATIVE STRESS; SENESCENCE; STRESS RESISTANCE; ZEA-MAYS ID GLUTATHIONE-REDUCTASE ACTIVITY; SUPEROXIDE-DISMUTASE; HYDROGEN-PEROXIDE; OAT LEAVES; LIPID-PEROXIDATION; SPINACH LEAVES; OXYGEN; OZONE; CHLOROPLASTS; PARAQUAT AB Leaves of 7- and 18-day-old plants of two maize strains, one resistant (LIZA) and one sensitive (LG11) to water stress, were floated in 1 mM paraquat and 1 mM H2O2 for 12 h in light and in darkness. The aim of this work was to analyse the effects of these substances on the activities of enzymes involved in the scavenging of active oxygen species during senescence. Three senescence parameters; chlorophyll loss, lipid peroxidation and conductivity; showed a general cell damage caused by both oxidative treatments and revealed a higher tolerance of LIZA than LG11 to paraquat and H2O2 both in light and in darkness. Activities of antioxidative enzymes increased by the effect of oxidative treatments in young and senescent leaves of the drought-resistant maize strain LIZA. These increases were about 3- to 6-fold in glutathione reductase, 3- to 4-fold in superoxide dismutase and 2-fold in ascorbate peroxidase activities. The possible correlation between water stress resistance, senescence and the potential of antioxidant enzymes was analysed. C1 NATL UNIV CORDOBA,FAC CIENCIAS EXACTAS FIS & NAT,FISIOL VEGETAL LAB,RA-5000 CORDOBA,ARGENTINA. RP PASTORI, GM, CSIC,UNIDAD BIOQUIM VEGETAL,ESTAC EXPTL ZAIDIN,APDO 419,E-18080 GRANADA,SPAIN. NR 35 TC 46 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0031-9317 J9 PHYSIOL PLANT JI Physiol. Plant. PD FEB PY 1993 VL 87 IS 2 BP 227 EP 231 PG 5 SC Plant Sciences GA KU921 UT ISI:A1993KU92100016 ER PT J AU CHINI, R KRUGEL, E HASLAM, CGT KREYSA, E LEMKE, R REIPURTH, B SIEVERS, A WARDTHOMPSON, D TI DISCOVERY OF A COLD AND GRAVITATIONALLY UNSTABLE CLOUD FRAGMENT SO ASTRONOMY AND ASTROPHYSICS LA English DT Letter DE INTERSTELLAR MEDIUM, DUST; FORMATION OF STARS ID STAR FORMATION; SUBMILLIMETER AB 1300 mum mapping of the region around the energy source of HH24 in the dark cloud L1652 has revealed a neighbouring strong, previously unknown source of dust emission. Photometry at 450, 800, 1100 and 1300 mum yields a very low dust temperature of around 10 K. Estimates for the mass of the object lead to values of 36 and 52 M. for radii of 4.1 . 10(16) and 8.2 . 10(16) cm which is at least a factor of 50 above the Jeans mass. The 1300 mum contours show an elongation along N-S and a strong central increase in density. These observational facts lead us to suggest that we have detected a cold and gravitationally unstable cloud fragment which might be a protostar. C1 EUROPEAN SO OBSER,SANTIAGO 19,CHILE. IRAM,E-18012 GRANADA,SPAIN. UNIV CAMBRIDGE,CAVENDISH LAB,MRAO,CAMBRIDGE CB3 0HE,ENGLAND. RP CHINI, R, MAX PLANCK INST RADIOASTRON,HUGEL 69,W-5300 BONN,GERMANY. NR 19 TC 46 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 1993 VL 272 IS 1 BP L5 EP L8 PG 4 SC Astronomy & Astrophysics GA LA022 UT ISI:A1993LA02200002 ER PT J AU HO, PTP PENG, YL TORRELLES, JM GOMEZ, JF RODRIGUEZ, LF CANTO, J TI A FLATTENED CLOUD CORE IN NGC-2024 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (NGC-2024); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; RADIO LINES, ISM ID ORION-B NGC-2024; MOLECULAR CLOUD; PROTOSTELLAR CONDENSATIONS; NGC 2024; AMMONIA; THERMOMETER; OUTFLOWS; REGION; LINE AB The (J, K) = (1, 1) and (2, 2) NH, lines were mapped toward a molecular cloud core in NGC 2024 using the VLA in its C/D-configuration. This region is associated with one of the most highly collimated molecular outflows. We find that the molecular condensations associated with the far-infrared sources FIR 5, FIR 6, and FIR 7 have kinetic temperatures T(K) congruent-to 40 K. We also find line broadening toward FIR 6 and FIR 7. This suggests that these condensations may not be protostars heated by gravitational energy released during collapse but that they have an internal heating source. A flattened structure of ammonia emission is found extending parallel to the unipolar CO outflow structure, but displaced systematically to the east. If the NH3 emission traces the denser gas environment, there is no evidence that a dense gas structure is confining the molecular outflow. Instead, the location of the high-velocity outflow along the surface of the NH3 structure suggests that a wind is sweeping material from the surface of this elongated cloud core. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. NANJING UNIV,NANJING,PEOPLES R CHINA. RP HO, PTP, HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138. NR 36 TC 13 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 1993 VL 408 IS 2 PN Part 1 BP 565 EP 572 PG 8 SC Astronomy & Astrophysics GA LA024 UT ISI:A1993LA02400019 ER PT J AU GOMEZ, JF TORRELLES, JM TAPIA, M GOMEZ, Y RODRIGUEZ, LF ROTH, M HO, PTP TI FURTHER-STUDIES ON THE CHAMPAGNE PHASE OF GM-24 (IRAS-17136-3617) SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-II REGIONS; ISM, INDIVIDUAL (GM-24); RADIO CONTINUUM, INTERSTELLAR ID H-II REGIONS AB We observed with the VLA the H II region associated with the cometary nebula GM 24 at the 3.6 and 6 cm continuum, the H92alpha recombination line, and the water maser line. These observations suggest the presence of a ''champagne'' flow of ionized gas. We detected two extended radio continuum sources emitting optically thin free-free radiation. The stronger one [S(nu)(total) congruent-to 4 Jy] is associated with GM 24, while the weaker one [S(nu)(total) congruent-to 0.1 Jy], located approximately 1'5 south of GM 24, is related to an optical nebula in the region. The maximum of radio continuum emission coincides with the source IRAS 17136-3617, which is the core of an infrared star cluster. The spectral line data show two velocity components toward GM 24 separated by approximately 10 km s-1. The velocity of the stronger and more compact component is close to the molecular cloud velocity, while its peak of line intensity coincides with the core of the star cluster. The largest H92alpha line widths (DELTAV congruent-to 46 km s-1) are also observed toward this position. The second velocity component (the weaker and extended one) is redshifted by approximately 10 km s-1 with respect to the velocity of the ambient molecular cloud. We suggest as a possible scenario that this velocity component constitutes emission from the ionized gas which is breaking out of the cloud and expanding away from us. A water maser source, with four velocity compoments, is located approximately 15'' southwest of the peak of the radio continuum emission. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. CARNEGIE INST WASHINGTON,LAS CAMPANAS OBSERV,LA SERENA,CHILE. UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. UNAM,INST ASTRON,ENSENADA 22830,BAJA CALIFORNIA,MEXICO. RP GOMEZ, JF, HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138. NR 18 TC 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 1993 VL 409 IS 1 PN Part 1 BP 269 EP 274 PG 6 SC Astronomy & Astrophysics GA LB038 UT ISI:A1993LB03800025 ER PT J AU TORRELLES, JM VERDESMONTENEGRO, L HO, PTP RODRIGUEZ, LF CANTO, J TI FROM BIPOLAR TO QUADRUPOLAR - THE COLLIMATION PROCESSES OF THE CEPHEUS-A OUTFLOW SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-PI REGIONS; ISM, INDIVIDUAL (CEPHEUS-A); ISM, JETS AND OUTFLOWS; ISM, MOLECULES ID HERBIG-HARO OBJECTS; OB3 MOLECULAR CLOUD; H-II REGIONS; STAR-FORMATION; INFRARED OBSERVATIONS; INTERSTELLAR AMMONIA; RADIO OBSERVATIONS; MASS OUTFLOW; CEP-A; CORE AB We present new high-angular (approximately 2'') and -velocity (approximately 0.3 km s-1) resolution observations in the (J, K) = (1, 1) and (2, 2) ammonia lines toward Cepheus A using the VLA D-configuration. As previously reported, the high-density gas is mainly distributed in three clumps, Cep A-1, Cep A-2, and Cep A-3. Cep A-1 and Cep A-3 constitute an interstellar elongated structure (approximately 2.'3 x 0.'4, or approximately 0.5 x 0.08 pc), with the stellar activity center located at its northwest edge. We find that Cep A-1 and Cep A-3 are located, respectively, between the two main pairs of the blue- and redshifted CO lobes of the quadrupolar molecular outflow. This implies that the interstellar disklike structure cannot collimate the bipolar outflow near its origin in the east-west direction. The high-velocity outflow and the photons of its powering source seem to be producing significant perturbations of the morphological, kinematical, and temperature structures at the edges of the ammonia condensations. We suggest that the interstellar high-density condensations are diverting and redirecting the molecular outflow at scales of approximately 0.05-0.5 pc, with Cep A-1 and Cep A-3 splitting in two halves, respectively, the blue- and redshifted lobes of an originally bipolar outflow already collimated in the east-west direction at circumstellar scales. Part of the high-density gas located at the edges of the interstellar ammonia condensations may be in the process of being incorporated into the general high-velocity molecular outflow by a dragging effect. However, the overall observed motions in the interstellar high-density gas could be bound by the observed mass in the region. HW 2 is embedded in a circumstellar (approximately 3.3 x 2.''3, or approximately 2400 x 1700 AU; pa. = 22-degrees) high-density [n(H2) congruent-to 3 x 10(7)(X(NH3)/10(-8))-1 cm-3] clump of approximately 2(X(NH3)/10(-8))-1 M.. The high rotational temperatures [T(R)(22-11) = 40-50 K] and the large velocity dispersions in the ammonia emission (sigma congruent-to 3-4 km s-1) found toward this position lead us to favor this object as the powering source of the high-velocity outflow. The observed motions of the circumstellar molecular gas could reflect the bound motions of the gas (e.g., rotation or infall) around a central mass of approximately 10-20 M., or alternatively the perturbation of the ps by the wind of the central source. This circumstellar clump could be related to the circumstellar disk previously suggested from infrared continuum and maser line observations. We find that gas temperatures as a function of the projected distance r with respect to HW 2 can be fitted by T(R)(22-11) is-proportional-to r(-alpha), with alpha = 0.3-0.6. These indices are quite similar to those expected if heating of the molecular gas is via collisions with hot dust heated by the radiation of the central star(s). The observed luminosity in the region is enough to heat the gas up to the observed temperatures. This analysis suggests that similar VLA studies of radial temperature profiles in other star-forming regions may be very useful for understanding heating processes and identifying exciting sources. C1 UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP TORRELLES, JM, CSIC,INST ASTROFIS ANDALUCIA,AP CORREOS 3004,C SANCHO PANZA S-N,E-18080 GRANADA,SPAIN. NR 51 TC 43 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 10 PY 1993 VL 410 IS 1 PN Part 1 BP 202 EP 217 PG 16 SC Astronomy & Astrophysics GA LE330 UT ISI:A1993LE33000021 ER PT J AU DAZA, MC SANDALIO, LM QUIJANORICO, M DELRIO, LA TI ISOENZYME PATTERN OF SUPEROXIDE-DISMUTASE IN COFFEE LEAVES FROM CULTIVARS SUSCEPTIBLE AND RESISTANT TO THE RUST HEMILEIA-VASTATRIX SO JOURNAL OF PLANT PHYSIOLOGY LA English DT Article DE COFFEA-ARABICA; HEMILEIA-VASTATRIX; CU; ZN-SUPEROXIDE DISMUTASE; FE-SUPEROXIDE DISMUTASE; MN-SUPEROXIDE DISMUTASE; RUST INFECTION; SOD PATTERN ID PISUM-SATIVUM-L; PROTECTIVE SYSTEMS; OXYGEN-TOXICITY; PLANTS; MANGANESE; LOCALIZATION; INDUCTION; VULGARIS; RADICALS; STRESS AB Superoxide dismutases (SOD; EC 1.15.1.1) in coffee leaves (Coffea arabica L.) from cultivars susceptible and resistant to infection by Hemileia vastatrix (Berk and Br.) were characterized by non-denaturing polyacrylamide gel electrophoresis. The 3 molecular forms of SOD were distinguished from each other by their different sensitivities to cyanide and H2O2. In leaves of the susceptible cultivar (cv. Caturra), one Mn-SOD, one Fe-SOD, and one Cu,Zn-SOD were found, and Fe-SOD was the most abundant isozyme (about 50 % of the total SOD activity). In coffee leaves from the resistant cultivar (cv. Colombia), two additional Cu,Zn-SODs were present. The appearance of new Cu,Zn-SOD isoenzymes could be related to the manifestation of resistance against fungal infection. The identification of Fe-SOD in a species belonging to the plant family Rubiaceae extends the small number of higher plants where the presence of these Fe-containing metalloenzymes has been demonstrated. Results obtained may be useful from an evolutionary viewpoint and also in oxy-radical studies in plants dealing with defence mechanisms against fungal infection. C1 CSIC,ESTAC EXPTL ZAIDIN,UNIDAD BIOQUIM VEGETAL,E-18080 GRANADA,SPAIN. RP DAZA, MC, FED NACL CAFETEROS COLOMBIA,INVEST QUIM CAFE PROD NAT LAB,CALLE 26A 37-28,BOGOTA,COLOMBIA. NR 36 TC 16 PU GUSTAV FISCHER VERLAG PI JENA PA VILLENGANG 2, D-07745 JENA, GERMANY SN 0176-1617 J9 J PLANT PHYSIOL JI J. Plant Physiol. PD MAY PY 1993 VL 141 IS 5 BP 521 EP 526 PG 6 SC Plant Sciences GA LF787 UT ISI:A1993LF78700002 ER PT J AU RODRIGUEZ, E ROLLAND, A DECOCA, PL GARRIDO, R MENDOZA, EE TI SIMULTANEOUS UVBY PHOTOMETRY OF 28 ANDROMEDAE SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE STARS, VARIABLE; STARS, DELTA SCT; PHOTOMETRY ID DELTA-SCUTI STARS; STROMGREN PHOTOMETRY; PULSATING STARS; MULTISITE CAMPAIGN; CATALOG AB Simultaneous uvby photometric observations of the low amplitude delta Scuti type star 28 Andromedae are presented. Analysis of the data using the Fourier transform method suggests 28 And as a monoperiodic pulsator. Using the classical O-C method, it is found that the pulsation of this star can be well described by means of a linear ephemeris with a period of p=0.d069304118 over the last twenty-four years. Amplitude variations are also shown to be present from season to season. The analysis of the phase shifts and amplitude ratios between observed light and colour variations suggests that 28 And is a non-radial pulsator. C1 UNAM,INST ASTRON,MEXICO CITY,DF,MEXICO. RP RODRIGUEZ, E, CSIC,INST ASTROFIS ANDALUCIA,APARTADO 3004,E-18080 GRANADA,SPAIN. NR 38 TC 17 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 1993 VL 273 IS 2 BP 473 EP 481 PG 9 SC Astronomy & Astrophysics GA LJ207 UT ISI:A1993LJ20700019 ER PT J AU GOMEZ, JF TORRELLES, JM HO, PTP RODRIGUEZ, LF CANTO, J TI UPPER LIMITS TO THE DETECTION OF AMMONIA FROM PROTOPLANETARY DISKS AROUND HL TAURI AND L1551-IRS 5 SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; STARS, INDIVIDUAL (HL TAURI, L1551 IRS 5); STARS, PRE-MAIN-SEQUENCE ID YOUNG STELLAR OBJECTS; CIRCUMSTELLAR DISKS; ACCRETION DISK; STARS; OUTFLOWS; SPECTRA; IRS-5; GAS AB We present NH3(1, 1) and (2, 2) observations of the young stellar sources HL Tau and L1551-IRS 5 using the VLA in its B-configuration, which provides an angular resolution of approximately 0.4'' (approximately 50 AU at 140 pc) at 1.3 cm wavelength. Our goal was to detect and resolve circumstellar molecular disks with radius of the order of 100 AU around these two sources. No ammonia emission was detected toward either of them. The 3 sigma levels were 2.7 mJy beam-1 and 3.9 mJy beam-1 for HL Tau and L1551-IRS 5, respectively, with a velocity resolution of approximately 5 km s-1. With this nondetection, we estimate upper limits to the mass of the proposed protoplanetary molecular disks (within a radius of 10 AU from the central stars) on the order of 0.02 (X(NH3)/10(-8))-1 M. for HL Tau and 0.1 (X(NH3)/10(-8))-1 M. for L1551-IRS 5. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP GOMEZ, JF, HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138. NR 33 TC 5 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 1993 VL 414 IS 1 PN Part 1 BP 333 EP 336 PG 4 SC Astronomy & Astrophysics GA LU114 UT ISI:A1993LU11400029 ER PT J AU RAGA, AC CANTO, J CALVET, N RODRIGUEZ, LF TORRELLES, JM TI A UNIFIED STELLAR JET MOLECULAR OUTFLOW MODEL SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE HYDRODYNAMICS; TURBULENCE; INTERSTELLAR MEDIUM, JETS AND OUTFLOWS; INTERSTELLAR MEDIUM, MOLECULES ID HERBIG-HARO OBJECTS; CO LINE FORMATION; MACH NUMBER JET; RILEY-I JETS; SURFACE BRIGHTNESS; THEORETICAL-MODEL; NH3 OBSERVATIONS; STAR FORMATION; BIPOLAR FLOWS; TURBULENT AB We present a coupled stellar jet/molecular outflow model. In this model, the stellar jet is assumed to have a large number of ''internal working surfaces'' that intercept material from the jet beam and eject it sideways into the near environment. This sideways ejection of mass and momentum leads to the formation of a ''turbulent envelope'' in which the jet material is mixed with entrained environmental gas. Under the assumption that the jet has a large number of internal working surfaces (which would probably be the case for an evolved outflow), we derive a simple theoretical framework for describing this flow. We then use this model to obtain predictions of intensity maps and position-velocity diagrams which can be directly compared with observations of molecular outflows. We also discuss the general characteristics predicted from our model, which apparently show a good qualitative agreement with observations of molecular outflows. However, our model appears to predict a somewhat too high degree of collimation for the molecular outflows. This discrepancy could be a result of the simple parametrization that we have adopted for the description of the turbulent flow. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV LEEDS,SCH MATH,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND. UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. CTR INVEST ASTRON,MERIDA 5101A,VENEZUELA. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP RAGA, AC, UNIV MANCHESTER,INST SCI & TECHNOL,DEPT MATH,POB 88,MANCHESTER M60 1QD,LANCS,ENGLAND. NR 37 TC 67 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 1993 VL 276 IS 2 BP 539 EP 548 PG 10 SC Astronomy & Astrophysics GA LW895 UT ISI:A1993LW89500024 ER PT J AU PENA, JH HOBART, MA RODRIGUEZ, E TI OBSERVATIONS AND PERIOD VARIATION ANALYSIS OF THE W-UMA TYPE STAR SW LAC SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE STARS ECLIPSING BINARIES; STARS VARIABLES ID PHOTOELECTRIC OBSERVATIONS; MINIMUM LIGHT; BINARIES; LACERTAE; EPOCHS AB Recent photoelectric-photometric data of the W UMa system SW Lacertae are reported. From the times of minima obtained in the present paper and those found in the literature, linear, quadratic and harmonic ephemeris are derived; the residuals show that the period variation of this system is not strictly periodic. C1 UNIV VERACRUZ,FAC FIS,XALAPA 91000,VERACRUZ,MEXICO. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP PENA, JH, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 57 TC 5 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 1993 VL 25 IS 2 BP 63 EP 69 PG 7 SC Astronomy & Astrophysics GA MB264 UT ISI:A1993MB26400001 ER PT J AU CLAUSEN, JV GARCIA, JM GIMENEZ, A HELT, BE VAZ, LPR TI 4-COLOR PHOTOMETRY OF ECLIPSING BINARIES .35. LIGHT CURVES OF GG LUPI - YOUNG METAL-DEFICIENT B-STARS SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE PHOTOMETRY; STARS BINARIES-ECLIPSING; STARS INDIVIDUAL-GG LUP; STARS INDIVIDUAL-HR5696; STARS INDIVIDUAL-HR5668; STARS INDIVIDUAL-HR5724 AB This paper presents the first photoelectric light curves (uvby) of the bright southern detached double lined eclipsing binary GG Lupi (HR5687, B7 V + B9 V, p = 1.85d) consisting of two main sequence stars (4.1 M. and 2.5 M.) close to the ZAMS. The orbit of GG Lup is eccentric (e = 0.150) and shows apsidal motion (U = 101 yr). The light curves, which contain 1035 observations in each colour, were collected during March 1985. Observations from 1987-91 for 10 additional times of minima are also given. Accurate masses and radii (almost-equal-to 1%) of the components have been established from an analysis of the light curves and of new radial velocity curves. A detailed study of GG Lup is published separately (Andersen et al. 1993). C1 ASTRON OBSERV,NIELS BOHR INST ASTRON PHYS & GEOPHYS,DK-1350 COPENHAGEN K,DENMARK. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UPM,EUIT IND,DEPT FIS,E-28012 MADRID,SPAIN. INTA,ASTROFIS ESPACIAL & FIS FUNDAMENTAL LAB,E-28080 MADRID,SPAIN. UFMG,OBSERV ASTRON SERRA PIEDALE,DEPT FIS ICEX,BR-30161 BELO HORIZON,MG,BRAZIL. RP CLAUSEN, JV, ASTRON OBSERV,NIELS BOHR INST ASTRON PHYS & GEOPHYS,BRORFELDEVEJ 23,DK-4340 TOLLOSE,DENMARK. NR 8 TC 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD NOV PY 1993 VL 101 IS 3 BP 563 EP 572 PG 10 SC Astronomy & Astrophysics GA MD978 UT ISI:A1993MD97800010 ER PT J AU FERRO, AA MENDOZA, EE TI CALIBRATIONS OF M-UPSILON, [FE/H], AND LOG-G FOR YELLOW SUPERGIANT STARS FROM O I-7774 AND U-UPSILON-BY-BETA-DATA SO ASTRONOMICAL JOURNAL LA English DT Article ID F-TYPE STARS; COLOR EXCESSES; BRIGHT GIANTS; A-TYPE; PHOTOMETRY; ABUNDANCE; CATALOG; INDEXES; SYSTEM; TERMS AB New calibrations of the absolute magnitude M(v) from O I 7774 data are derived from narrow-band photometry and low dispersion spectroscopy for A0-G2 low and high luminosity stars. The nonlinear dependence of M(v) from the equivalent width W(O I) and the relevance of the stellar temperature in the calibration are confirmed in agreement with previous calibrations obtained from high resolution spectroscopy. Also functional formulas to estimate [Fe/H] and log g from uvbybeta data for F0-G3 supergiants are offered. These calibrations predict iron abundances. and gravities for yellow supergiants with uncertainties not much higher than good spectroscopic determinations. C1 CSIC,INST ASTROFIS ANDAULCIA,E-18080 GRANADA,SPAIN. RP FERRO, AA, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 43 TC 12 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 1993 VL 106 IS 6 BP 2516 EP 2523 PG 8 SC Astronomy & Astrophysics GA MK862 UT ISI:A1993MK86200028 ER PT J AU MENDOZA, EE FERRO, AA TI A PHOTOMETRIC AND SPECTROSCOPIC SEARCH FOR LUMINOUS HIGH-LATITUDE STARS SO ASTRONOMICAL JOURNAL LA English DT Article ID BETA PHOTOMETRY; F-SUPERGIANTS; CALIBRATION; CATALOG; LIGHT; LINE AB Formulas, derived by Arellano Ferro and Mendoza in Paper I [AJ, 106, 2516 (1993)], to calculate M(v), log g, and [Fe/H] were applied to a group of 73 A, F, and G stars of high galactic latitude previously classified as supergiant stars. The only star that showed, from data on hand, to be luminous, slightly iron deficient, and out of the galactic plane was BL Telescopii. The remainder of the sample either present controversial results or are definitively giant or dwarf stars misclassified as supergiants. Thus, if luminous, young stars indeed exist out of the galactic plane, they are extremely rare. C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP MENDOZA, EE, CSIC,INST ASTROFIS ANDALUCIA,APARTADO POSTAL 3004,E-18080 GRANADA,SPAIN. NR 36 TC 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 1993 VL 106 IS 6 BP 2524 EP 2531 PG 8 SC Astronomy & Astrophysics GA MK862 UT ISI:A1993MK86200029 ER PT J AU RODRIGUEZ, LF CANTO, J TORRELLES, JM GOMEZ, JF ANGLADA, G HO, PTP TI SUBARCSECOND VLA1 MAPS OF THE DISK AND THE JET IN HL TAURI SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, JETS AND OUTFLOWS; PLANETARY SYSTEMS; RADIO CONTINUUM, ISM; STARS; PRE-MAIN-SEQUENCE ID CIRCUMSTELLAR MOLECULAR GAS; MASSIVE YOUNG STAR; RADIO-CONTINUUM; L1551 IRS-5; CLOUD CORES; SYSTEM; COLLAPSE; OUTFLOWS; COMPLEX; DUST AB High-angular resolution (approximately 0.3''-0.4'') VLA observations of HL Tau at 3.6 and 1.3 cm show extended structures associated with this young star that are strikingly different at each wavelength. While the structure observed at 3.6 cin is elongated approximately in the east-west direction, the 1.3 cm structure is elongated approximately in the north-south direction. We interpret these results to imply that while the 3.6 cm emission is dominated by free-free radiation from an ionized outflow, the 1.3 cm emission traces dust emission from a perpendicular, collimating disk. If our interpretation is correct, these VLA images represent the first subsecond images of both jet and disk in a young star. C1 UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UB,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP RODRIGUEZ, LF, NATL RADIO ASTRON OBSERV,POB 0,SOCORRO,NM 87801. NR 32 TC 22 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 1 PY 1994 VL 427 IS 2 PN Part 2 BP L103 EP L106 PG 4 SC Astronomy & Astrophysics GA NN740 UT ISI:A1994NN74000010 ER PT J AU PRIETO, C AGUILERA, JF LACHICA, M FERNANDEZFIGARES, I PEREZ, L NIETO, R FERRANDO, G TI THE USE OF PLASMA-FREE AMINO-ACIDS FOR PREDICTING THE LIMITING AMINO ACID(S) IN DIETS FOR CHICKENS SO ANIMAL FEED SCIENCE AND TECHNOLOGY LA English DT Article ID PROTEIN AB Three experiments were carried out with male broiler chicks aged 23 days (Experiments 1 and 2) and 28 days (Experiment 3). In Experiment 1 chicks were tube-fed with a nitrogen (N)-free diet for 4 days and then with a diet based on casein. Blood samples were taken by heart puncture for amino acid (AA) analysis at hourly intervals between 0 and 6 h after a meal. In Experiments 2 and 3, chicks were tube-fed at 1.5 or 1.9 maintenance level with isoenergetic (13.1 kJ ME/g(-1) DM) semisynthetic diets of different protein quality. In Experiment 2, high protein diets (20% crude protein) based on casein (C), lupin (L), soya bean (SB), faba bean (FB), field pea (FP), vetch (V) or bitter vetch (B), as the only source of protein, were used. In Experiment 3, low protein diets (12% CP) contained SB, FP, V or B. In both experiments, a N-free diet was also given. Samples of blood were taken for AA analysis between 3 and 4 h after a meal. In Experiment 1, a post-prandial increase in aminoacidemia was found; AA levels in plasma rose quickly, reaching a peak at 1 h, remained constant until 5 h and then declined, without reaching the initial values after 6 h. Irrespective of the protein quality or the protein level of the diets, the plasma AA ratio technique was in reasonable agreement with the Protein Score procedures in identifying the two most limiting amino acids for mast diets assayed. Methionine was found to be either the first or second limiting PLA for all diets, with the exception of diet C in Experiment 2 (tryptophan and histidine, respectively). C1 FAC CIENCIAS VET & PECUARIAS,SANTIAGO,CHILE. RP PRIETO, C, ESTAC EXPTL ZAIDIN,PROF ALBAREDA 1,E-18008 GRANADA,SPAIN. NR 32 TC 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-8401 J9 ANIM FEED SCI TECH JI Anim. Feed Sci. Technol. PD MAY PY 1994 VL 47 IS 1-2 BP 151 EP 164 PG 14 SC Agriculture, Dairy & Animal Science GA NV056 UT ISI:A1994NV05600013 ER PT J AU RODRIGUEZ, LF GARAY, G CURIEL, S RAMIREZ, S TORRELLES, JM GOMEZ, Y VELAZQUEZ, A TI CEPHEUS-A HW2 - A POWERFUL THERMAL RADIO JET SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-II REGIONS; ISM, INDIVIDUAL (CEPHEUS A); ISM, JETS AND OUTFLOWS; RADIO CONTINUUM, STARS; STARS, FORMATION; STARS, PRE-MAIN-SEQUENCE ID HERBIG-HARO OBJECTS; IONIZED STELLAR WINDS; OB3 MOLECULAR CLOUD; STAR-FORMING REGION; MASSIVE YOUNG STAR; VLA OBSERVATIONS; WATER-VAPOR; OUTFLOW; BIPOLAR; CONTINUUM AB At angular resolution of approximately 1'' the Cepheus A East radio source is known to consist of 16 compact components clustered within a 25'' radius region, most of which are aligned in stringlike structures. We present multifrequency VLA radio continuum observations of Cep A HW2, the elongated radio object believed to be associated with the most luminous (approximately 10(4) L.) source in the region. In the frequency range from 1.5 to 43 GHz, we find that its flux density increases with frequency as nu0.69, while the angular size of its major axis decreases with frequency as nu-0.57. The above frequency dependences are very close to the theoretical values of nu0.6 and nu-0.7 expected for a biconical thermal jet and make Cep A HW2 the best example known of this type of object. We suggest that Cep A HW2 is responsible for at least part of the complex outflow and excitation phenomena observed in the region. The estimated ionized mass-loss rate in this source, approximately 8 x 10(-7) M. yr-1, is about 100 times larger than the value expected for a star of the same luminosity in the main sequence. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CHILE,DEPT ASTRON,SANTIAGO,CHILE. RP RODRIGUEZ, LF, NATL RADIO ASTRON OBSERV,POB 0,SOCORRO,NM 87801. NR 35 TC 60 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUL 20 PY 1994 VL 430 IS 1 PN Part 2 BP L65 EP L68 PG 4 SC Astronomy & Astrophysics GA NW514 UT ISI:A1994NW51400017 ER PT J AU WINGET, DE NATHER, RE CLEMENS, JC PROVENCAL, JL KLEINMAN, SJ BRADLEY, PA CLAVER, CF DIXSON, JS MONTGOMERY, MH HANSEN, CJ HINE, BP BIRCH, P CANDY, M MARAR, TMK SEETHA, S ASHOKA, BN LEIBOWITZ, EM ODONOGHUE, D WARNER, B BUCKLEY, DAH TRIPE, P VAUCLAIR, G DOLEZ, N CHEVRETON, M SERRE, T GARRIDO, R KEPLER, SO KANAAN, A AUGUSTEIJN, T WOOD, MA BERGERON, P GRAUER, AD TI WHOLE EARTH TELESCOPE OBSERVATIONS OF THE DBV WHITE-DWARF GD-358 SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, INDIVIDUAL (GD-358); STARS, OSCILLATIONS; WHITE DWARFS ID ZZ-CETI STARS; ASTEROSEISMOLOGY AB We report on the analysis of 154 hours of early continuous high-speed photometry on the pulsating DB white dwarf (DBV) GD 358, obtained during the Whole Earth Telescope (WET) run of 1990 May. The power spectrum of the light curve is dominated by power in the range from 1000 to 2400 muHz, with more than 180 significant peaks in the total spectrum. We identify all of the triplet frequencies as degree l = 1, and from the details of their spacings we derive the total stellar mass as 0.61 +/- 0.03 M., the mass of the outer helium envelope as 2.0 +/- 1.0 x 10(-6) M*, the absolute luminosity as 0.050 +/- 0.012 L. and the distance as 42 +/- 3 pc. We find strong evidence for differential rotation in the radial direction-the outer envelope is rotating at least 1.8 times faster than the core-and we detect the presence of a weak magnetic field with a strength of 1300 +/- 300 G. We also find a significant power at the sums and differences of the dominant frequencies, indicating nonlinear processes are significant, but they have a richness and complexity that rules out resonant mode coupling as a major cause. C1 UNIV TEXAS,MCDONALD OBSERV,AUSTIN,TX 78712. UNIV COLORADO,BOULDER,CO 80309. NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. PERTH OBSERV,BICKLEY,WA,AUSTRALIA. INDIAN SPACE RES ORG,ISRO SATELLITE CTR,DIV TECH PHYS,BANGALORE 560017,INDIA. TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. UNIV CAPE TOWN,DEPT ASTRON,RONDEBOSCH 7700,SOUTH AFRICA. OBSERV MIDI PYRENEES,F-31400 TOULOUSE,FRANCE. OBSERV PARIS,F-9195 MEUDON,FRANCE. INST ASTROFIS ANDALUCIA,GRANADA,SPAIN. UNIV FED RIO GRANDE SUL,INST FIS,BR-90049 PORTO ALEGRE,RS,BRAZIL. EUROPEAN SO OBSERV,LA SILLA,CHILE. FLORIDA INST TECHNOL,DEPT PHYS & SPACE SCI,MELBOURNE,FL 32901. UNIV MONTREAL,DEPT PHYS,MONTREAL H3C 3J7,QUEBEC,CANADA. UNIV ARKANSAS,DEPT PHYS & ASTRON,LITTLE ROCK,AR 72204. RP WINGET, DE, UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712. NR 26 TC 108 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 1994 VL 430 IS 2 PN Part 1 BP 839 EP 849 PG 11 SC Astronomy & Astrophysics GA NZ043 UT ISI:A1994NZ04300036 ER PT J AU LAVAL, A GRY, C ROSADO, M MARCELIN, M GREVE, A TI THE EXCITING STAR OF THE SMALL BUBBLE N-120A IN THE LARGE MAGELLANIC CLOUD SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE LMC; STELLAR WIND; ISM BUBBLE ID ULTRAVIOLET SPECTRAL MORPHOLOGY; WOLF-RAYET STARS; H-II-REGIONS; O-TYPE STARS; STELLAR WINDS; MASS-LOSS; LINE-PROFILES; SEI METHOD; LMC; NEBULAE AB UV characteristics of the star BI 141 show that it is the exciting star of the nebula N 120A of the LMC. We determine its UV spectral classification as 09.5I and we derive the terminal velocity and mass-loss rate of its stellar wind, in agreement with the usual values found for galactic supergiants of the same spectral type. The energetic balance between the power of the stellar wind and the measured energetic input into the surrounding gas shows that the wind is largely the dominant factor for driving the bubble. The best model for the sustained bubble is the model with conservation of energy, (nonradiative shocked stellar winds). The discrepancy between the visible spectral classification B3I and the UV classification opens the questions of either the multiplicity or the valiability of BI 141, and of its stellar wind. C1 LAB ASTRON SPATIALE TRAVERSE SIPHON,F-13012 MARSEILLE,FRANCE. UNAM,MEXICO CITY 04510,MEXICO. IRAM,NUCL CENT,E-18012 GRANADA,SPAIN. RP LAVAL, A, OBSERV MARSEILLE,2 PL VERRIER,F-13248 MARSEILLE 04,FRANCE. NR 59 TC 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 1994 VL 288 IS 2 BP 572 EP 580 PG 9 SC Astronomy & Astrophysics GA PB634 UT ISI:A1994PB63400027 ER PT J AU CUENCA, G AZCON, R TI EFFECTS OF AMMONIUM AND NITRATE ON THE GROWTH OF VESICULAR-ARBUSCULAR MYCORRHIZAL ERYTHRINA-POEPPIGIANA OI COOK SEEDLINGS SO BIOLOGY AND FERTILITY OF SOILS LA English DT Article DE AMMONIUM; ERYTHRINA POEPPIGIANA; NITRATE; VA MYCORRHIZA; NUTRIENT UPTAKE; GLOMUS SPP ID LACTUCA-SATIVA; NITROGEN; INFECTION; NUTRITION; ASSIMILATION; TRANSPORT; FUNGUS; SHOOTS; TREES; ROOTS AB Erythrina poeppigiana, a woody tropical plant, was inoculated with vesicular-arbuscular mycorrhizal (VAM) fungi Glomus etunicatum Becker and Gerdeman, G. mosseae Nicol. and Gerd. Gerdeman and Trappe, or G. intraradices Schenk and Smith. Growth, N uptake, and nutrition were evaluated in VAM-inoculated plants and controls fertilized with two levels (3 or 6 mM) of either NH4+-N or NO3--N. The response by the mycorrhizal plants to N fertilization, according to N source and/or level differed significantly from that of the control plants. In general, the growth of the mycorrhizal plants was similar to that of the non-mycorrhizal plants when N was provided as NH4+. When the N source was NO3- the control plants grew significantly less than the VAM plants. Inoculation with VAM fungi gave yield increases of 255 and 268% for G. etunicatum-colonized plants, 201 and 164% for G. mosseae-colonized plants and 286 and 218% for G. intraradices-colonized plants fertilized with 3 and 6 mM NO3--N, respectively. The increased growth and acquisition of nutrients by plants fertilized with NO3--N and inoculated with VAM shows that VAM mycelium has a capacity for NO3- absorption. The results also showed that E. poeppigiana seedlings preferred NH4+ as an N source. G. etunicatum was the most effective endophyte, not only increasing N, P, Ca, Mg, and Zn uptake in the presence of NO3- fertilizer but also P and Mg in the presence of NH4+ applications. From these results we conclude that VAM symbiosis affects N metabolism in E. poeppigiana plants and that this species can overcome limitations on the use of NO3--N by the mediation of VAM fungi. C1 CSIC,DEPT MICROBIOL,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. RP CUENCA, G, INST VENEZOLANO INVEST CIENT,CTR ECOL & CIENCIAS AMBIENTALES,APARTADO 21827,CARACAS 1020A,VENEZUELA. NR 34 TC 15 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-2762 J9 BIOL FERT SOILS JI Biol. Fertil. Soils PD AUG PY 1994 VL 18 IS 3 BP 249 EP 254 PG 6 SC Soil Science GA PJ344 UT ISI:A1994PJ34400014 ER PT J AU MCALLISTER, CB GARCIAROMERA, I GODEAS, A OCAMPO, JA TI IN-VITRO INTERACTIONS BETWEEN TRICHODERMA-KONINGII, FUSARIUM-SOLANI AND GLOMUS-MOSSEAE SO SOIL BIOLOGY & BIOCHEMISTRY LA English DT Article ID GROWTH; FUNGI; GERMINATION; PLANTS AB The inoculation of maize plants with spores of G. mosseae decreased the populations of the saprophytic fungi Trichoderma koningii and Fusarium solani. However, F. solani had no effect on mycorrhizal development, whereas G. mosseae was inhibited in its extramatrical stage by T. koningii. Germinated spores of G. mosseae did not affect growth of the saprophytic fungi on water-agar. T. koningii inhibited the germination, but not mycelial development of G. mosseae; this inhibition was independent of the change in pH of the medium. F. solani did not inhibit germination of G. mosseae spores, and endophyte hyphal development was markedly stimulated. The influence of soluble and volatile substances produced by the saprophytic fungi on these effects is discussed. C1 CSIC,DEPT MICROBIOL,ESTN EXPTL ZAIDAN,E-18008 GRANADA,SPAIN. UNIV BUENOS AIRES,DEPT CIENCIAS BIOL,RA-1428 BUENOS AIRES,ARGENTINA. NR 17 TC 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-0717 J9 SOIL BIOL BIOCHEM JI Soil Biol. Biochem. PD OCT PY 1994 VL 26 IS 10 BP 1369 EP 1374 PG 6 SC Soil Science GA PJ406 UT ISI:A1994PJ40600011 ER PT J AU GIRART, JM RODRIGUEZ, LF ANGLADA, G ESTALELLA, R TORRELLES, JM MARTI, J PENA, M AYALA, S CURIEL, S NORIEGACRESPO, A TI AMMONIA DOWNSTREAM FROM HH-80-NORTH SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL, (HH 80 NORTH); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; RADIO CONTINUUM, ISM ID HERBIG-HARO OBJECTS; RADIO-CONTINUUM EMISSION; MOLECULAR OUTFLOWS; PROTOSTELLAR DISK; GGD 27-IRS; REGIONS; SPECTROSCOPY; SYSTEM; DENSE; STAR AB HH 80-81 are two optically visible Herbig-Haro objects located about 5' south of their exciting source IRAS 18162-2048. Displaced symmetrically to the north of this luminous IRAS source, a possible HH counterpart was recently detected as a radio continuum source with the VLA. This radio source, HH 80 North, has been proposed to be a member of the Herbig-Haro class since its centimeter flux density, angular size, spectral index, and morphology are all similar to those of HH 80. However, no object has been detected at optical wavelengths at the position of HH 80 North, possibly because of high extinction, and the confirmation of the radio continuum source as an HH object has not been possible. In the prototypical Herbig-Haro objects HH 1 and 2, ammonia emission has been detected downstream of the how in both objects. This detection has been interpreted as a result of an enhancement in the ammonia emission produced by the radiation held of the shock associated with the HH object. In this Letter we report the detection of the (1, 1) and (2, 2) inversion transitions of ammonia downstream HH 80 North. This detection gives strong support to the interpretation of HH 80 North as a heavily obscured HH object. In addition, we suggest that ammonia emission may be a tracer of embedded Herbig-Haro objects in other regions of star formation. A 60 mu m IRAS source could be associated with HH 80 North and with the ammonia condensation. A tentative explanation for the far-infrared emission as arising in dust heated by the optical and UV radiation of the HH object is presented. C1 UNIV BARCELONA,DEPT ASTRON & METEOROL,BARCELONA,SPAIN. UNAM,INST ASTRON,MEXICO CITY,DF,MEXICO. NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. IEC,SOC CATALANA FIS,ASTROFIS LAB,MADRID,SPAIN. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. CALTECH,JET PROP LAB,CTR INFRARED PROC & ANAL,PASADENA,CA 91125. RP GIRART, JM, HARVARD UNIV,SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,MS 42,CAMBRIDGE,MA 02138. NR 31 TC 26 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1994 VL 435 IS 2 PN Part 2 BP L145 EP L148 PG 4 SC Astronomy & Astrophysics GA PQ973 UT ISI:A1994PQ97300017 ER PT J AU HOBART, MA PENA, JH PENICHE, R RODRIGUEZ, E GARRIDO, R RIOSBERUMEN, M RIOSHERRERA, M LOPEZCRUZ, O TI PHOTOMETRY AND PERIOD BEHAVIOR OF SELECT W UMA TYPE STARS SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE BINARIES; ECLIPSING; STARS; VARIABLES; OTHER AB Recent photoelectric data on the W UMa systems LZ Her, ER Ori, YY Eri and RZ Tau are reported. Linear and quadratic ephemerides are determined from the times of minima obtained in the present paper and those compiled from the literature; the rates of change in the periods are calculated from the quadratic terms in the ephemerides. C1 UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. UNIV AUTONOMA ZACATECAS,ZACETECAS 98000,MEXICO. UNIV TORONTO,DEPT ASTRON,TORONTO M5S 1A7,ONTARIO,CANADA. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP HOBART, MA, UNIV VERACRUZ,FAC FIS,APARTADO POSTAL 270,XALAPA 91190,VERACRUZ,MEXICO. NR 45 TC 8 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 1994 VL 28 IS 2 BP 111 EP 123 PG 13 SC Astronomy & Astrophysics GA PR470 UT ISI:A1994PR47000002 ER PT J AU MCALLISTER, CB GARCIAROMERA, I MARTIN, J GODEAS, A OCAMPO, JA TI INTERACTION BETWEEN ASPERGILLUS-NIGER VAN TIEGH AND GLOMUS-MOSSEAE (NICOL AND GERD) GERD AND TRAPPE SO NEW PHYTOLOGIST LA English DT Article DE ARBUSCULAR MYCORRHIZA; ASPERGILLUS NIGER; GLOMUS MOSSEAE; SAPROBIC FUNGUS ID MYCORRHIZAL FUNGI; GROWTH; INFECTION; ROOTS; PHOSPHORUS; PLANTS AB Percent germination and length of hyphae of germinated Glomus mosseae spores, cultivated on water agar, decreased significantly in the presence of Aspergillus niger; this decrease was independent of any change in pH of the medium. Soluble and volatile compounds produced by A. niger significantly decreased percentage spore germination and the hyphal length of G, mosseae on water agar. The decrease caused by volatile compounds was significantly greater when A, niger was grown on malt extract agar. Shoot dry weights of maize and lettuce plants cultivated in soil in pots, and percentage arbuscular mycorrhizal (AM) root colonization of plants grown either in sand:vermiculite tubes inoculated with G. mosseae spores or in soil in pots with soil inoculum, were unaffected by A. niger when this saprobe was inoculated 2 wk after G. mosseae. Shoot dry weights and percentage AM colonization of plants decreased when the saprobic fungus was inoculated at the same time or 2 wk before G. mosseae. However, the metabolic activity resulting from AM colonization, measured as the percentage of mycelium showing succinate dehydrogenase activity, decreased in all treatments. The population of A. niger decreased when inoculated to the rhizosphere of plants at the same time as, or 2 wk after, G, mosseae, but not when it was inoculated 2 wk before G, mosseae. Our results show that C. mosseae decreases the saprobic fungal population through its effect on the plant, whereas A. niger, by the production of soluble or volatile substances, inhibits G. mosseae in its extramatrical stage. C1 CSIC,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. RP MCALLISTER, CB, UNIV BUENOS AIRES,DEPT CIENCIAS BIOL,4 II PABELLON,RA-1428 BUENOS AIRES,DF,ARGENTINA. NR 30 TC 9 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0028-646X J9 NEW PHYTOL JI New Phytol. PD FEB PY 1995 VL 129 IS 2 BP 309 EP 316 PG 8 SC Plant Sciences GA QL617 UT ISI:A1995QL61700011 ER PT J AU ANGLADA, G ESTALELLA, R MAUERSBERGER, R TORRELLES, JM RODRIGUEZ, LF CANTO, J HO, PTP DALESSIO, P TI THE MOLECULAR ENVIRONMENT OF THE HH-34 SYSTEM SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, JETS AND OUTFLOWS; ISM, MOLECULES; RADIO LINES, ISM; STARS, INDIVIDUAL (HH 34); STARS, PRE-MAIN-SEQUENCE ID DENSE INTERSTELLAR CLOUDS; HERBIG-HARO OBJECTS; RADIO-CONTINUUM SOURCE; INTER-STELLAR CLOUDS; EXCITING STARS; ORION-KL; RATE COEFFICIENTS; DARK CLOUDS; BOW SHOCKS; MASS STARS AB We present single-dish (angular resolution similar to 40'') and VLA (angular resolution similar to 4'') ammonia observations toward the HH 34 region. Two main condensations are distinguished in both our single-dish and our VLA maps. The northern ammonia condensation is resolved by the VLA as an arclike structure that surrounds the east side of the star HH 34 IRS (the exciting source of the jet) and coincides in projection with Re 24, the reflection nebula associated with the infrared source IRS 5. We suggest that this ammonia structure is tracing the wall of a cavity around HH 34 IRS. Our results are in good agreement with the hypothesis that this cavity was created by the stellar wind from HH 34 IRS, indicating that along the life of the star two kinds of stellar wind might have been present: a low-collimation wind that created the cavity, and a highly collimated wind that is at the origin of the jet. A second VLA ammonia condensation coincides with Re 23, the brightest part of the are of optical nebulosity previously proposed to be tracing the western wall of a cavity that contains the jet. The inner edges of these two ammonia condensations coincide with zones of a high level of polarization of the optical emission. With the angular resolution of our VLA observations, no ammonia (1, 1) emission is detected directly associated with the star HH 34 IRS, setting an upper limit of 0.1[X(NH3)/10(-8)](-1) M. for the mass of a possible circumstellar disk. From our single-dish observations, we find that there is extended emission (similar to 3') of high-density gas, not seen with the VLA. For this gas we estimate a total mass of similar to 15 M. and a kinetic temperature of 15 K. C1 MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. RP ANGLADA, G, UNIV BARCELONA,DEPT ASTRON & METEOROL,AV DIAGONAL 647,E-08028 BARCELONA,SPAIN. NR 80 TC 12 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 20 PY 1995 VL 443 IS 2 PN Part 1 BP 682 EP 697 PG 16 SC Astronomy & Astrophysics GA QU584 UT ISI:A1995QU58400020 ER PT J AU JACQUOT, JP LOPEZJARAMILLO, J CHUECA, A CHERFILS, J LEMAIRE, S CHEDOZEAU, B MIGINIACMASLOW, M DECOTTIGNIES, P WOLOSIUK, R LOPEZGORGE, J TI HIGH-LEVEL EXPRESSION OF RECOMBINANT PEA CHLOROPLAST FRUCTOSE-1,6-BISPHOSPHATASE AND MUTAGENESIS OF ITS REGULATORY SITE SO EUROPEAN JOURNAL OF BIOCHEMISTRY LA English DT Article DE LIGHT REGULATION; THIOREDOXIN; FRUCTOSE-1,6-BISPHOSPHATASE ID AMINO-ACID-SEQUENCE; NADP-MALATE DEHYDROGENASE; SPINACH-CHLOROPLAST; NUCLEOTIDE-SEQUENCE; THIOREDOXIN-F; CDNA; GENE; LIGHT; PROTEINS; IDENTIFICATION AB The cDNA fragment coding for mature chloroplast pea fructose-1,6-bisphosphatase [Fru(1,6)P(2)ase] was introduced by PCR into the expression vector pET-3d resulting in the construction pET-FBP. After transformation of BL21(DE3) Escherichia coli cells by the pET-FBP plasmid and induction with isopropyl thio-beta-D-galactoside, high-level expression of the recombinant enzyme was achieved. The protein could be purified in three days by a simple procedure which includes heat treatment, ammonium sulfate fractionation, DEAE Sephacel and ACA 44 chromatographies with a yield of 20 mg/l culture. In every respect, the recombinant enzyme was similar to plant chloroplast Fru(1,6)P(2)ase and, in particular, its reactivity with Mg2+ and redox regulatory properties were conserved. In a second series of experiments based on three-dimensional modeling of the chloroplast protein and sequence alignments, two cysteine residues of the recombinant enzyme (Cys173 and Cys178) were mutated into serine residues. An active enzyme, which did not respond to thiol reagents and to light activation, was obtained, confirming the putative regulatory role of the insertional sequence characteristic of the chloroplast enzyme. C1 CSIC,ESTAC EXPTL ZAIDIN PROF ALBAREDA,GRANADA,SPAIN. CNRS,ENZYMOL LAB,GIF SUR YVETTE,FRANCE. FDN CAMPOMAR,INST INVEST BIOQUIM,RA-1405 BUENOS AIRES,DF,ARGENTINA. RP JACQUOT, JP, UNIV PARIS 11,CNRS,INST BIOTECHNOL PLANTES,BATIMENT 630,F-91405 ORSAY,FRANCE. NR 43 TC 42 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0014-2956 J9 EUR J BIOCHEM JI Eur. J. Biochem. PD MAY 1 PY 1995 VL 229 IS 3 BP 675 EP 681 PG 7 SC Biochemistry & Molecular Biology GA QW630 UT ISI:A1995QW63000012 ER PT J AU COX, P MEZGER, PG SIEVERS, A NAJARRO, F BRONFMAN, L KREYSA, E HASLAM, G TI MILLIMETER EMISSION OF ETA-CARINAE AND ITS SURROUNDINGS SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE STARS, INDIVIDUAL, ETA CARINE; INFRARED, STARS; RADIO CONTIMUUM, STARS; STARS, MASS LOSS ID MASS-LOSS; NEBULA; ENVELOPES; SPECTRUM; STARS; RADIO AB Using the SEST telescope we have mapped the lambda 1.3-mm and 2.9-mm continuum emission around Eta Carinae (eta Car), the peculiar star belonging to the open cluster Trumpler 16 in the Carina Nebula. The maps are dominated by a central source whose position coincides with eta Car. Extended millimeter continuum emission is detected both at lambda 1.3 and 2.9-mm. This emission traces the optically thin free-free emission from the gas ionized by the nearby massive luminous stars of Trumpler 16. In 1992, the flux densities of eta Car were 15.8+/-1.9 Jy at lambda 1.3-mm and 4.9+/-0.7Jy at 2.9-mm. From an analysis of the spectrum from the near-infrared to the decimeter radio range, we show that the millimeter emission of eta Car is dominated by thermal emission from the ionized stellar wind. The infrared emission is dominated by dust radiation with temperatures ranging from 200 to 400 K. The total luminosity is L(IR) = 5 10(6) L.. Based on the millimeter flux densities measured in 1992, we derive a mass-loss rate of similar to 2.4 10(-3) M.yr(-1). Measurements obtained during the time interval from 1991 to 1994 indicate strong flux density variations at both millimeter wavelengths. We suggest that these variations are related to episodic shell ejections leading to variations in the degree of ionization in the wind of eta Car. C1 OBSERV MARSEILLE,F-13248 MARSEILLE 4,FRANCE. INST RADIO ASTRON MILLIMETR,GRANADA,SPAIN. UNIV MUNICH,INST ASTRON & ASTROPHYS,D-97074 MUNICH,GERMANY. UNIV CHILE,DEPT ASTRON,SANTIAGO,CHILE. RP COX, P, MAX PLANCK INST RADIOASTRON,POSTFACH 2024,D-53121 BONN,GERMANY. NR 37 TC 40 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 1995 VL 297 IS 1 BP 168 EP 174 PG 7 SC Astronomy & Astrophysics GA QW868 UT ISI:A1995QW86800022 ER PT J AU SULENTIC, JW MARZIANI, P DULTZINHACYAN, D CALVANI, M MOLES, M TI FIRST DIRECT COMPARISON OF HIGH AND LOW IONIZATION LINE KINEMATICS IN ACTIVE GALACTIC NUCLEI SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, SEYFERT; GALAXIES, NUCLEI; QUASARS, EMISSION LINES ID PROFILES; QSOS AB We present first results of a comparison of emission line shift properties for the high (HILs) and low (LILs) ionization lines in 43 low-redshift quasars. We identify a core sample of C IV lambda 1549 and H beta profiles with a wide distribution of red- and blueshifts (less than or equal to+/-1000 km s(-1)). We also identify two tails in this distribution: one with large HE redshifts (greater than or equal to 2000 km s(-1)) and another with large C IV blueshifts (greater than or equal to 1500 km s(-1)). The tails are mutually exclusive. All objects with extreme H beta redshift are radio loud, and all objects with extreme C IV blueshift are radio quiet. The core samples of smaller shifts can be most simply divided into: (1) H beta-a red-shifted radio-loud population (related to the tail) acid a radio-quiet population with mean shift near zero, and (2) C IV-a blueshifted radio-quiet population (related to the tail) and a radio-loud population with mean shift near zero. The results suggest fundamentally different kinematics for the HILs and LILs. They also suggest very different kinematics for radio-loud and radio-quiet active galactic nuclei. They also favor a predominance of radial motion in a large fraction of the sample. C1 UNAM,INST ASTRON,MEXICO CITY,DF,MEXICO. OSSERV ASTRON PADOVA,I-35122 PADUA,ITALY. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP SULENTIC, JW, UNIV ALABAMA,DEPT PHYS & ASTRON,TUSCALOOSA,AL 35487. NR 10 TC 19 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 1 PY 1995 VL 445 IS 2 PN Part 2 BP L85 EP L89 PG 5 SC Astronomy & Astrophysics GA RA626 UT ISI:A1995RA62600005 ER PT J AU ROBLES, AB PASSERA, CB TI NATIVE FORAGE SHRUB SPECIES IN SOUTH-EASTERN SPAIN - FORAGE SPECIES, FORAGE PHYTOMASS, NUTRITIVE-VALUE AND CARRYING-CAPACITY SO JOURNAL OF ARID ENVIRONMENTS LA English DT Article DE CARRYING CAPACITY; GOATS; MEDITERRANEAN BASIN; NUTRITIVE VALUE; PHYTOMASS; RANGELAND; SHRUBS ID GRANADINA GOATS; MAINTENANCE; PROTEIN AB This study provides data on plant density, vegetation cover, total and forage phytomass for the main rangelands and shrubs of a 'pilot zone' (Almeria, Spain) in the south-east of Spain. Carrying capacity has been calculated for each rangeland, and for two different levels of energy requirements: maintenance (from 0.29 to 1.28 goats ha(-1)) and production (from 0.20 to 0.88 goats ha(-1)). The nutritive value was determined for the most representative shrubs in the area C1 CONSEJO NACL INVEST CIENT & TECN,INST ARGENTINO INVEST ZONAS ARIDAS,RA-5500 MENDOZA,ARGENTINA. RP ROBLES, AB, CSIC,ESTAC EXPTL ZAIDIN,BOX 419,E-18008 GRANADA,SPAIN. NR 13 TC 5 PU ACADEMIC PRESS (LONDON) LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0140-1963 J9 J ARID ENVIRON JI J. Arid. Environ. PD JUN PY 1995 VL 30 IS 2 BP 191 EP 196 PG 6 SC Ecology; Environmental Sciences GA RF903 UT ISI:A1995RF90300008 ER PT J AU CANO, MI GRUBER, A VAZQUEZ, M CORTES, A LEVIN, MJ GONZALEZ, A DEGRAVE, W RONDINELLI, E ZINGALES, B RAMIREZ, JL ALONSO, C REQUENA, JM DASILVEIRA, JF TI MOLECULAR KARYOTYPE OF CLONE CL BRENER CHOSEN FOR THE TRYPANOSOMA-CRUZI GENOME PROJECT SO MOLECULAR AND BIOCHEMICAL PARASITOLOGY LA English DT Note DE TRYPANOSOMA CRUZI; CLONE CL BRENER; GENOME PROJECT; MOLECULAR KARYOTYPE; CHROMOSOME MAPPING ID CHAGAS-DISEASE; VARIABILITY; GENES; DNA C1 ESCOLA PAULISTA MED,BR-04023062 SAO PAULO,BRAZIL. UNIV SAO PAULO,INST QUIM,BR-05508 SAO PAULO,BRAZIL. INST INVEST ENGN GENET & BIOL MOLEC,BUENOS AIRES,DF,ARGENTINA. INST PARASITOL & BIOMED,GRANADA,SPAIN. FIOCRUZ MS,RIO JANEIRO,BRAZIL. UNIV FED RIO DE JANEIRO,INST BIOFIS,BR-21945 RIO JANEIRO,BRAZIL. UCV,CTR BIOL CELULAR,CARACAS,VENEZUELA. AUTONOMOUS UNIV MADRID,CTR MOLEC BIOL,E-28049 MADRID,SPAIN. NR 17 TC 99 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-6851 J9 MOL BIOCHEM PARASITOL JI Mol. Biochem. Parasitol. PD MAY PY 1995 VL 71 IS 2 BP 273 EP 278 PG 6 SC Biochemistry & Molecular Biology; Parasitology GA RG119 UT ISI:A1995RG11900016 ER PT J AU CABRERACANO, J MORENO, E FRANCO, J ALFARO, EJ TI THE LOCATION OF STELLAR CLUSTERS IN THE BIG DENT - AN AGE GRADIENT ALONG THE Z-AXIS SO ASTROPHYSICAL JOURNAL LA English DT Article DE CEPHEIDS; GALAXY, STRUCTURE; OPEN CLUSTERS AND ASSOCIATIONS, GENERAL; STARS, FORMATION ID MOLECULAR CLOUD COMPLEXES; HIGH-VELOCITY CLOUDS; STAR GAS COMPLEXES; INTERSTELLAR-MEDIUM; GALACTIC DISK; DIFFUSE CLOUDS; GALAXY; MASS; ASSOCIATIONS; REGIONS AB The ages and locations of stellar clusters and individual Cepheid stars in the depression called the ''Big Dent'' are analyzed. The Z-locations of the cluster sample display a well-defined Z-age stratification. The Cepheid sample has ages between 3 and 8 x 10(7) yr and shows a departure from the midplane similar to the one observed for clusters of the same age range. The existence of such an age gradient seems to corroborate previous hypotheses suggesting that the star formation activity was probably triggered by the same strong perturbation which originated the depression. A model in which the Big Dent was created by a collision of a high-velocity cloud with the Galactic disk is able to reproduce the observed gradient. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNAM,INST ASTRON,MEXICO CITY,DF,MEXICO. RP CABRERACANO, J, UNIV SEVILLA,APDO CORREOS 1065,E-41080 SEVILLE,SPAIN. NR 61 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUL 20 PY 1995 VL 448 IS 1 PN Part 1 BP 149 EP 156 PG 8 SC Astronomy & Astrophysics GA RJ489 UT ISI:A1995RJ48900012 ER PT J AU VAZ, LPR CLAUSEN, JV GIMENEZ, A HELT, BE JENSEN, KS TI 4-COLOR PHOTOMETRY OF ECLIPSING BINARIES .30A. LIGHT CURVES OF LZ-CENTAURI SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE STARS, BINARIES, ECLIPSING; STARS, INDIVIDUAL, LZ CEN; STARS, FUNDAMENTAL PARAMETERS AB Complete uvby light curves of the detached double-lined early B-type eclipsing binary LZ Centauri are presented. They contain 916 points in each colour and were obtained 1982-84. A detailed photometric analysis based on these observations and on new spectroscopic material will be published separately (Vaz, et al. 1995). C1 ASTRON OBSERV,NIELS BOHR INST ASTRON PHYS & GEOPHYS,DK-4340 TOLLOSE,DENMARK. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. ASTRON OBSERV,NIELS BOHR INST ASTRON PHYS & GEOPHYS,DK-1350 COPENHAGEN K,DENMARK. UNIV WISCONSIN,DEPT ASTRON,MADISON,WI 53706. RP VAZ, LPR, UNIV FED MINAS GERAIS,ICEX,DEPT FIS,CP 702,BR-30161970 BELO HORIZONT,MG,BRAZIL. NR 5 TC 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD JUL PY 1995 VL 112 IS 1 BP 123 EP 124 PG 2 SC Astronomy & Astrophysics GA RK221 UT ISI:A1995RK22100009 ER PT J AU BAJAJA, E WIELEBINSKI, R REUTER, HP HARNETT, JI HUMMEL, E TI OBSERVATIONS OF CO LINES IN SOUTHERN SPIRAL GALAXIES SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE GALAXIES; ISM; SPIRAL; RADIO LINES; GALAXIES ID SURFACE PHOTOMETRY; CENTRAL REGION; NGC-1566; KINEMATICS; DYNAMICS; NGC-613; GAS AB Six southern spiral galaxies, with diameters between 5' and 8', were mapped with the SEST in the (CO)-C-12(1-0) line. CO emission was detected in five of the galaxies. The 43'' beam of the SEST, at 115 GHz, was small enough for determining the general distribution of the gas, which is centrally peaked in all the cases, and the velocity field from which we could derive the major axis position angle and the rotation curve. The latter is, in general, very steep at the centre and quite flat after the turn-over point. It was used to estimate the total mass of the galaxy up to the farthest measured point. The gas mass was estimated from the CO and H I global velocity profiles. On three of the galaxies the (CO)-C-12(2-1) and (CO)-C-13(1-0) lines were also observed on their centres, the first one on a 10'' grid, covering a region of 20'' x 20'', and the second on one point towards the centre. The average ratio between the intensities of the (CO)-C-12(2-1) and (CO)-C-12(1-0) spectra is 1.3 in the three cases. The detections of the (CO)-C-13(1-0) were only marginal. A good correlation has been found between the CO and the continuum emission at 843 MHz. C1 MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. INST ARGENTINO RADIOASTRON,RA-1894 VILLA ELISA,BUENOS AIRES,ARGENTINA. IRAM,E-18012 GRANADA,SPAIN. UNIV SYDNEY,SCH PHYS,SYDNEY,NSW 2006,AUSTRALIA. NR 34 TC 20 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD NOV PY 1995 VL 114 IS 1 BP 147 EP 166 PG 20 SC Astronomy & Astrophysics GA TF255 UT ISI:A1995TF25500009 ER PT J AU ABE, O ABE, R ASAISHI, K ENOMOTO, K HATTORI, T IINO, Y KIKUCHI, K KOYAMA, H SAWA, K UCHINO, J YOSHIDA, M VANDEVELDE, AO VERMORKEN, JB FOROGLOU, P GIOKAS, G LISSAIOS, B HARVEY, VJ HOLDAWAY, TM KAY, RG MASON, BH FORBES, JF FOCAN, C LOBELLE, JP PEEK, U OATES, GD POWELL, J BASTERT, G RAUSCHECKER, H SAUER, R SAUERBREI, W SCHAUER, A SCHUMACHER, M GELMAN, RS HENDERSON, IC SHAPIRO, CL HANCOCK, AK JACKSON, S RAGAZ, J DELOZIER, T MACELESECH, J HAYBITTLE, JL CIRRINCIONE, C KORZUN, A WEISS, RB WOOD, WC BAUM, M HOUGHTON, J RILEY, D DENT, DM GUDGEON, CA HACKING, A HORGAN, K HUGHES, L STEWART, HJ GORDON, NH DAVIS, HL OWEN, JR MEIER, P HOWELL, A RIBEIRO, GC SWINDELL, R ALBANO, J DEOLIVEIRA, CF GERVASIO, H GORDILHO, J CARSTENSEN, B PALSHOF, T JOHANSEN, H KORZENIOWSKI, S SKOLYSZEWSKI, J ANDERSEN, KW AXELSSON, CK BLICHERTTOFT, M MOURIDSEN, HT OVERGAARD, M ROSE, C CORCORAN, N TRAMPISCH, HJ ABELOFF, MD CARBONE, PC GLICK, J GRAY, R TORMEY, DC BARTELINK, H FENTIMAN, IS PARIDAENS, R VANDRIEL, OJR SYLVESTER, RJ VANDEVELDE, CJH VANDERSCHUEREN, E VANDONGEN, JA WELVAART, K SCANLON, EF SCHURMAN, S DESCHRYVER, A YOSEF, HMA MCARDLE, CS SMITH, DC LARA, PC BOCCARDO, F IZUO, M MORISHITA, Y BENTLEY, A DORAN, Z HAYWARD, JL RUBENS, RD KAUFMANN, M JONAT, W SCHEURLEN, H VONFOURNIER, D KAUFMANN, M KLEFSTROM, P CUZICK, J MARGREITER, R CAVALLI, F COLLINS, J GELBER, RD GOLDHIRSCH, A ISLEY, MR LINDTNER, J PRICE, KN RUDENSTAM, CM BLISS, JM CHILVERS, CED COOMBES, RC MARTY, M BRUFMAN, G HAYAT, H BOROVIK, R ROBINSON, E PANNUTI, F TAKASHIMA, S YASUTOMI, T SONOO, H YAMASHITA, J OGAWA, M NOMURA, Y BONTE, J TENGRUP, I TENNVALLNITTBY, L MARTIN, P ROMAIN, S AHMANN, D SCHAID, DJ BUZDAR, AU SMITH, T HAKES, T NORTON, L WITTES, R DELAHUERTA, R SAINZ, MG BONADONNA, G DELVECCHIO, M VALAGUSSA, P VERONESI, U DUBOIS, JB BIANCO, AR LIPPMAN, ME PIERCE, LJ SIMON, R STEINBERG, SM BROWN, A FISHER, B REDMOND, C WOLMARK, N JACKSON, IM PALMER, MK INGLE, JN BENGTSSON, NO LARSSON, LG LYTHGOE, JP KISSIN, M HANNISDAL, E VARHAUG, JE BLAMEY, RW MITCHELL, AK ROBERTSON, JFR NAKAMURA, Y MATHE, G MISSET, JL CLARKE, EA MCLAUGHLIN, JR CLARK, RM LEVINE, M MORIMOTO, K GUNDERSEN, S HAUERJENSEN, M HOST, H CROSSLEY, E DURRANT, K HARRIS, A BEIGHTON, A CHADBON, D CLARKE, M COLLINS, R DAVIES, C EVANS, V GODWIN, J GREAVES, E HARWOOD, C JAMES, S MEAD, G MULDAHL, A PETO, R TOOTH, A WHEATLEY, K RAMBERT, P ASSELAIN, B SALMON, RJ VILCOQ, JR ARRIAGADA, R HILL, C LAPLANCHE, A LE, MG SPIELMANN, M COCCONI, G DIBLASIO, B CATALANO, R CREECH, RH BROCKSCHMIDT, J COOPER, MR ANDRYSEK, O BARKMANOVA, J TREURNIETDONKER, AD VANPUTTEN, WLJ EASTON, D POWLES, TJ GAZET, JC SEMIGLAZOV, V DESHPANDE, N DIMARTINO, L DOUGLAS, P LINDTNER, A NOTTER, G NISSENMEYER, R FORREST, APM JACK, W MCDONALD, C MOLLER, TR RYDEN, S CARSTENSEN, J HATSCHEK, T SODERBERG, M CARPENTER, JT ALBAIN, K CROWLEY, J GREEN, S OSBORNE, CK RUTQUIST, LE WALLGREN, A HOLM, LE CASTIGLIONE, M FLUCKIGER, H THURLIMANN, B BRENNER, H HERCBERGS, A YOSHIMOTO, M DEBOER, G PATERSON, AHG PRITCHARD, KI MEAKIN, JW PANZARELLA, T NAJA, A BAHI, J REID, M SPITTLER, M SENANAYAKE, F HOLMBERG, L SEVELDA, P ZIELINSKY, CC JAKESZ, R BUCHANAN, RB CROSS, M DUNN, JA GILLESPIE, WM KELLY, K MORRISON, JM LITTON, A CHLEBOWSKI, RT BEZWODA, WR CAFFIER, H TI EFFECTS OF RADIOTHERAPY AND SURGERY IN EARLY BREAST-CANCER - AN OVERVIEW OF THE RANDOMIZED TRIALS SO NEW ENGLAND JOURNAL OF MEDICINE LA English DT Article ID REQUIRING PROLONGED OBSERVATION; POSTOPERATIVE RADIOTHERAPY; RECURRENCE; PATIENT; DESIGN AB Background. Randomized trials of radiotherapy and surgery for early breast cancer may have been too small to detect differences in long-term survival and recurrence reliably. We therefore performed a systematic overview (meta-analysis) of the results of such trials. Methods. Information was sought on each subject from investigators who conducted trials that began before 1985 and that compared local therapies for early breast cancer. Data on mortality were available from 36 trials comparing radiotherapy plus surgery with the same type of surgery alone, 10 comparing more-extensive surgery with less-extensive surgery, and 18 comparing more-extensive surgery with less-extensive surgery plus radiotherapy. Information on mortality was available for 28,405 women (97.4 percent of the 29,175 women in the trials). Results. The addition of radiotherapy to surgery resulted in a rate of local recurrence that was three times lower than the rate with surgery alone, but there was no significant difference in 10-year survival; among a total of 17,273 women enrolled in such trials, mortality was 40.3 percent with radiotherapy and 41.4 percent without radiotherapy (P=0.3). Radiotherapy was associated with a reduced risk of death due to breast cancer (odds ratio, 0.94; 95 percent confidence interval, 0.88 to 1.00; P=0.03), which indicates that, after 10 years, there would be about 0 to 5 fewer deaths due to breast cancer per 100 women. However, there was an increased risk of death from other causes (odds ratio, 1.24; 95 percent confidence interval, 1.09 to 1.42; P=0.002). This, together with the age-specific death rates, implies, after 10 years, a few extra deaths not due to breast cancer per 100 older women or per 1000 younger women, During the first decade or two after diagnosis, the excess in the rate of such deaths that was associated with radiotherapy was much greater among women who were over 60 years of age at randomization (15.3 percent vs. 11.1 percent [339 vs. 249 deaths]) than among those under 50 (2.5 percent vs. 2.0 percent [62 vs. 49 deaths]). Breast-conserving surgery involved some risk of recurrence in the remaining tissue, but no significant differences in overall survival at 10 years were found in the studies of mastectomy versus breast-conserving surgery plus radiotherapy (4891 women), more-extensive surgery versus less-extensive surgery (4818 women), or axillary clearance versus radiotherapy as adjuncts to mastectomy (4370 women). Conclusions. Some of the local therapies for breast cancer had substantially different effects on the rates of local recurrence - such as the reduced recurrence with the addition of radiotherapy to surgery - but there were no definite differences in overall survival at 10 years. C1 INTEGRAAL KANKERCENTRUM ZUID,EINDHOVEN,NETHERLANDS. METAXAS MEM HOSP,PIRAEUS,GREECE. AUCKLAND BREAST CANC STUDY GRP,AUCKLAND,NEW ZEALAND. AKAD WISSENSCH BERLIN,BERLIN,GERMANY. BIRMINGHAM GEN HOSP,BIRMINGHAM,W MIDLANDS,ENGLAND. BUNDESMINIST FORSCH & TECHNOL,BONN,GERMANY. FDN BERGONIE,BORDEAUX,FRANCE. DANA FARBER CANC INST,BOSTON,MA 02115. BRADFORD ROYAL INFIRM,BRADFORD,W YORKSHIRE,ENGLAND. BRITISH COLUMBIA CANC AGCY,VANCOUVER,BC,CANADA. ADDENBROOKES HOSP,CAMBRIDGE,ENGLAND. CANC RES CAMPAIGN,LONDON,ENGLAND. GROOTE SCHUUR HOSP,CAPE TOWN,SOUTH AFRICA. CARDIFF SURG TRIALISTS,CARDIFF,S GLAM,WALES. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. CHELTENHAM GEN HOSP,CHELTENHAM,PA. UNIV CHICAGO,CHICAGO,IL 60637. CHRISTIE HOSP & HOLT RADIUM INST,MANCHESTER,LANCS,ENGLAND. COIMBRA INST ONCOL,COIMBRA,PORTUGAL. DANISH CANC REGISTRY,COPENHAGEN,DENMARK. COPENHAGEN RADIUM CTR,COPENHAGEN,DENMARK. CRACOW INST ONCOL,KRAKOW,POLAND. DUBLIN ST LUKES HOSP,DUBLIN,IRELAND. UNIV DUSSELDORF,DUSSELDORF,GERMANY. EASTERN COOPERAT ONCOL GRP,BOSTON,MA. EUROPEAN ORG RES TREATMENT CANC,AMSTERDAM,NETHERLANDS. EVANSTON HOSP CORP,EVANSTON,IL. GLASGOW BEATSON ONCOL CTR,GLASGOW,LANARK,SCOTLAND. GLASGOW VICTORIA INFIRM,GLASGOW,LANARK,SCOTLAND. GRANADA UNIV HOSP,GRANADA,SPAIN. GUNMA UNIV,MAEBASHI,GUMMA,JAPAN. GUYS HOSP,LONDON,ENGLAND. UNIV HEIDELBERG,W-6900 HEIDELBERG,GERMANY. DEACONESS MED CTR,HELSINKI,FINLAND. IMPERIAL CANC RES FUND,LONDON,ENGLAND. INNSBRUCK UNIV,INNSBRUCK,AUSTRIA. INT BREAST CANC STUDY GRP,BERN,SWITZERLAND. CHARING CROSS HOSP,INT COLLABORAT CANC GRP,LONDON,ENGLAND. TECHNION ISRAEL INST TECHNOL,RAMBAM MED CTR,IL-32000 HAIFA,ISRAEL. KAWASAKI MED UNIV,KAWASAKI,KANAGAWA,JAPAN. KUMAMOTO UNIV GRP,KUMAMOTO,JAPAN. ACAD ZIEKENHUIS ST RAFAEL,LOUVAIN,BELGIUM. LUND UNIV,S-22100 LUND,SWEDEN. APM,CANCEROL BIOL LAB,MARSEILLE,FRANCE. MAYO CLIN,ROCHESTER,MN 55905. MD ANDERSON CANC CTR,HOUSTON,TX 77030. MEM SLOAN KETTERING CANC CTR,NEW YORK,NY 10021. NATL MED CTR,MEXICO CITY,DF,MEXICO. IST NAZL STUDIO & CURA TUMORI,I-20133 MILAN,ITALY. MONTPELLIER CTR PAUL LAMARQUE,MONTPELLIER,FRANCE. UNIV NAPLES,I-80138 NAPLES,ITALY. NCI,BETHESDA,MD 20892. NATL SURG ADJUVANT BREAST & BOWEL PROJECT,PITTSBURGH,PA. NORTHWICK PK HOSP & CLIN RES CTR,HARROW,MIDDX,ENGLAND. CITY HOSP NOTTINGHAM,NOTTINGHAM,ENGLAND. OITA PREFECTURAL HOSP,OITA,JAPAN. ONTARIO CANC TREATMENT & RES FDN,TORONTO,ON,CANADA. ONTARIO CLIN ONCOL GRP,HAMILTON,ON,CANADA. OSAKA CITY MED SCH,OSAKA,JAPAN. OSLO RADIUM HOSP,OSLO,NORWAY. OXFORD CHURCHILL HOSP,OXFORD,ENGLAND. IMPERIAL CANC RES FUND,MRC,CLIN TRIAL SERV UNIT,LONDON,ENGLAND. CTR RENE HUGUENIN,ST CLOUD,FRANCE. INST CURIE,F-75231 PARIS,FRANCE. INST GUSTAVE ROUSSY,F-94805 VILLEJUIF,FRANCE. PARMA HOSP,PARMA,ITALY. FOX CHASE CANC CTR,PHILADELPHIA,PA 19111. PIEDMONT ONCOL ASSOC,WINSTON SALEM,NC. CHARLES UNIV,PRAGUE,CZECH REPUBLIC. ROTTERDAM RADIO THERAPEUT INST,ROTTERDAM,NETHERLANDS. ROYAL MARSDEN HOSP,INST CANC RES,LONDON,ENGLAND. ST GEORGE HOSP,LONDON,ENGLAND. ONCOL HOSP A BUSINICO,SARDINIA,ITALY. SASKATCHEWAN CANC FDN,SASKATOON,SK,CANADA. SCOTTISH CANC TRIALS OFF,EDINBURGH,MIDLOTHIAN,SCOTLAND. SW ONCOL GRP,SEATTLE,WA. STOCKHOLM BREAST CANC STUDY GRP,STOCKHOLM,SWEDEN. KAROLINSKA HOSP,STOCKHOLM,SWEDEN. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. CANC INST HOSP,TOKYO,JAPAN. TORONTO EDMONTON BREAST CANC STUDY GRP,TORONTO,ON,CANADA. TOULOUSE CTR CLAUDIUS REGAUD,TOULOUSE,FRANCE. INST SALAH AZAIZ,TUNIS,TUNISIA. UPPSALA OREBRO CANC STUDY GRP,UPPSALA,SWEDEN. UNIV HOSP VIENNA,VIENNA,AUSTRIA. UNIV WITWATERSRAND,JOHANNESBURG 2050,SOUTH AFRICA. NR 14 TC 499 PU MASS MEDICAL SOC PI BOSTON PA 10 SHATTUCK, BOSTON, MA 02115 SN 0028-4793 J9 N ENGL J MED JI N. Engl. J. Med. PD NOV 30 PY 1995 VL 333 IS 22 BP 1444 EP 1455 PG 12 SC Medicine, General & Internal GA TG445 UT ISI:A1995TG44500002 ER PT S AU Calvani, M Sulentic, JW Marziani, P DultzinHacyan, D Moles, M TI A possible fundamental difference between radio loud and radio quiet AGN SO EXTRAGALACTIC RADIO SOURCES SE IAU SYMPOSIA LA English DT Article C1 UNIV ALABAMA,TUSCALOOSA,AL. UNAM,INST ASTRON,MEXICO CITY,DF,MEXICO. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP Calvani, M, OSSERV ASTRON PADOVA,PADUA,ITALY. NR 1 TC 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 J9 IAU SYMP PY 1996 IS 175 BP 250 EP 251 PG 2 SC Astronomy & Astrophysics GA BG55R UT ISI:A1996BG55R00090 ER PT J AU Toro, M Azcon, R Herrera, R TI Effects on yield and nutrition of mycorrhizal and nodulated Pueraria phaseoloides exerted by P-solubilizing rhizobacteria SO BIOLOGY AND FERTILITY OF SOILS LA English DT Article DE mycorrhiza; Glomus sp; P-solubilizing bacteria; phytate-mineralizing rhizobacteria; Pueraria phaseoloides; rhizosphere; unavailable P ID ROCK PHOSPHATE; FUNGI; SOIL; BACTERIA; INFECTION; GROWTH; PLANTS; PHOSPHORUS; ROOTS AB We studied the effect of bacteria involved in rock phosphate (four isolates), iron phosphate (two isolates), and aluminium phosphate (two isolates) solubilization, and two phytate-mineralizing bacteria in terms of their interaction with two Glomus spp. on Pueraria phaseoloides growth and nutrition. The plant Rhizobium sp. - mycorrhiza symbiosis system may increase in yield and nutrition in association with specific rhizosphere bacteria that solubilize calcium, iron, and aluminium phosphates. No benefit from phytate-mineralizing bacteria was found under these experimental conditions. P. phaseloides growth responses were influenced in different ways by specific combinations of the selected bacteria and arbuscular mycorrhizal fungi. Considerable stimulation of nutrient uptake was observed with fungus-bacteria combinations of Azospirillum sp. 1, Bacillus sp. 1 or Enterobacter (spp. 1 or 2) associated with G. mosseae. The fact that Bacillus sp. 1, a calcium-phosphate solubilizing isolate, positively interacted with G. mosseae and negatively with G. fasciculatum is an indication of specific functional compatibility between the biotic components integrated in the system. From our results, the interactions between bacterial groups able to solubilize specific phosphate and mycorrhizal fungi cannot be interpreted as occurring only via P solubilization mechanisms since no generalized effect was obtained. Iron-phosphate solubilizing microorganisms were more active alone than in dual associations with Glomus sp., but the aluminium-phosphate dissolving isolates positively interacted in mycorrhizal plants. Further work is needed in this area in order to elucidate the mechanisms that affect rhizosphere microorganism interactions. G. mosseae was more effective but less infective than G. fasciculatum in most of the combined treatments. C1 INST VENEZOLANO INVEST CIENT,CTR ECOL & CIENCIAS AMBIENTALES,CARACAS 1020A,VENEZUELA. RP Toro, M, CSIC,ESTAC EXPTL ZAIDIN,DEPT MICROBIOL SUELO & SISTEMAS SIMBIOT,E-18008 GRANADA,SPAIN. NR 30 TC 15 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-2762 J9 BIOL FERT SOILS JI Biol. Fertil. Soils PY 1996 VL 21 IS 1-2 BP 23 EP 29 PG 7 SC Soil Science GA TH365 UT ISI:A1996TH36500005 ER PT J AU Curiel, S Rodriguez, LF Gomez, JF Torrelles, JM Ho, PTP Eiroa, C TI High-velocity ammonia emission associated with the young stellar object Serpens FIRS 1 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, individual (Serpens FIRS 1); ISM, jets and outflows; ISM, molecules; stars, pre-main-sequence ID RADIO-CONTINUUM SOURCE; MOLECULAR OUTFLOWS; INFRARED IMAGES; CLOUD; CORE AB We have performed VLA, Haystack, and Effelsberg 100 m ammonia observations of the molecular core associated with the highly collimated radio continuum jet of the very young stellar object (YSO) Serpens FIRS 1. An analysis of the overall morphology, kinematics, and excitation of the ambient cloud core is presented. In particular, the mean rotational temperature derived over a region of 2' x 2' around FIRS 1 is found to be 12 K, whereas it increases to 30 K at distances within 6 '' from FIRS 1, indicating that FIRS 1 is the dominant energy source in the cloud core. By averaging the blueshifted (V-LSR = -6.1 --> +5.7 km s(-1)) and redshifted (V-LSR = +10.7 --> +22.5 km s(-1)) spectral channels of the VLA data with respect to the ambient cloud velocity (V-LSR = 7.0-9.4 km s(-1)), we have detected an excess of emission (above the expected continuum) that we identify as high-velocity ammonia emission associated with the YSO FIRS 1. The blue- and redshifted emissions seem to have a bipolar morphology, suggesting that they trace a bipolar ammonia outflow of similar to 20 '' in size and aligned with the radio continuum jet. We identify this high-velocity ammonia emission, with an estimated mass M(H-2) similar or equal to 0.2 [XNH(3)/10(-8))](-1) M., as associated with the molecular gas entrained by the radio jet. In addition, NH3 (1,1), (2,2), and (3,3) spectra of this region taken with the Haystack and the Effelsberg 100 m telescopes show ammonia emission at even higher velocities (up to similar to 30-40 km s(-1) from the line center) than those observed with the VLA (less than or similar to 20 km s(-1)), suggesting that the VLA observations cover only a fraction of the velocity range of the ammonia outflow. New VLA ammonia observations covering a higher velocity range are needed to fully map this high-velocity molecular emission and to confirm its bipolar distribution. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV AUTONOMA MADRID,FAC CIENCIAS,DPT FIS TEOR,E-28049 MADRID,SPAIN. RP Curiel, S, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 24 TC 9 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 10 PY 1996 VL 456 IS 2 PN Part 1 BP 677 EP 685 PG 9 SC Astronomy & Astrophysics GA TN541 UT ISI:A1996TN54100024 ER PT J AU Torrelles, JM Gomez, JF Rodriguez, LF Curiel, S Ho, PTP Garay, G TI The thermal radio jet of Cepheus A HW2 and the water maser distribution at 0.''08 scale (60 AU) SO ASTROPHYSICAL JOURNAL LA English DT Article DE H II regions; ISM, individual (Cepheus A); ISM, jets and outflows; masers; stars, formation ID STAR; CONTINUUM; BIPOLAR; OUTFLOW AB We report observations of the thermal radio jet in Cepheus A HW2, and the associated water masers, carried out with the highest (0 ''.08) angular resolution available to date at the VLA (A configuration at lambda = 1.3 cm). To calibrate the 1.3 cm continuum emission, we used the strong (similar to 1000 Jy) H2O maser source as the reference, thus correcting the amplitude and phase instabilities introduced by the atmosphere. This powerful technique, first applied here to a star-forming region, allowed us to achieve a dynamic range of 15,000 : 1 for the strongest maser feature, a signal-to-noise ratio (S/N) of 70 : 1 for the radio jet and an accuracy of the order of 1 mas in the relative positions between the radio-continuum jet and the H2O masers in the region. We resolved the 1.3 cm jet into two maxima plus a fainter tail to the southwest. The separation between these two maxima (0 ''.14) and the total size of the jet (0 ''.39) are both consistent with models for a biconical ionized jet. The observed flux density (39 mJy) is, however, higher than expected. We detected 39 H2O maser spots toward the Cepheus A region, 28 of which are associated with the HW2 object, most of them distributed on either sides of the radio jet. We suggest that these latter maser features might be tracing a circumstellar molecular disk of radius similar to 300 AU, nearly perpendicular to the radio jet. The velocity gradient of 30 +/- 10 km s(-1) observed in the H2O spots over 600 AU along the axis perpendicular to the radio jet could be gravitationally bound by a central mass of 70 +/- 40 M.. C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CHILE,DEPT ASTRON,SANTIAGO,CHILE. RP Torrelles, JM, CSIC,INST ASTROFIS ANDALUCIA,AP CORREOS 3004,C SANCHO PANZA S-N,E-18080 GRANADA,SPAIN. NR 17 TC 31 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1996 VL 457 IS 2 PN Part 2 BP L107 EP L111 PG 5 SC Astronomy & Astrophysics GA TQ548 UT ISI:A1996TQ54800014 ER PT J AU Garay, G Ramirez, S Rodriguez, LF Curiel, S Torrelles, JM TI The nature of the radio sources within the Cepheus A star-forming region SO ASTROPHYSICAL JOURNAL LA English DT Article DE H II regions; ISM, individual (Cepheus A); ISM, jets and outflows; radio continuum, stars; stars, formation; stars, pre-main-sequence ID HERBIG-HARO OBJECTS; IONIZED STELLAR WINDS; CONTINUUM EMISSION; PROPER MOTIONS; MOLECULAR CLOUDS; VLA OBSERVATIONS; BIPOLAR OUTFLOW; YOUNG STARS; WATER-VAPOR; HH OBJECTS AB We present multifrequency, matching-beam, VLA radio continuum observations of the Cep A East radio source, known to consist of 16 compact (similar to 1'') components clustered within a 25 degrees radius region, most of which are aligned in stringlike structures. We find that the spectral indices of the emission from these compact objects, in the frequency interval from 1.5 to 15 GHz, cover a wide range, from -0.6 to 0.7. Positive spectral indices are exhibited by sources 2, 3b, 3c, and 3d. The first and last of these objects, the brightest sources within Cep A East, exhibit in addition elongated morphologies and angular-size and flux-density dependences with frequency that suggest they correspond to confined jets of ionized gas. Most of the objects that appear in string structures exhibit a mixture of flat and negative spectral indices across their faces, which indicates the presence of both thermal and nonthermal emission. The spectral indices of the integrated emission from sources 1b, 4, 6, and 7a are in the range between -0.3 and -0.1 while those of sources 1a, 5, 7b, and 7c are even more negative (-0.6 less than or equal to alpha less than or equal to -0.4). We suggest that the radio emission from the string sources arises in shocks resulting from the interaction of confined stellar winds with the surrounding medium. The duality in emission mechanisms is expected in shock waves where a small fraction of the electrons are accelerated to relativistic velocities, giving rise to nonthermal emission, while most of the electrons produce thermal free-free emission. We find that the nonthermal emission dominates the thermal emission when the density of the thermal electrons is below a critical density of similar to 5 x 10(3) cm(-3). We also observed the Cep A West radio source, which consists of two compact components and an elongated, diffuse, champagne-like structure. We find that the spectral index between 1.5 and 5 GHz of the peak and of the integrated emission from the latter component are -0.1 and -0.4, respectively. We suggest that the radio emission from the diffuse source arises from shocked gas at the edge of a cavity driven by a wind that originates from the brightest compact radio object within this region, which shows a spectral index at the peak of the emission of 0.6. C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP Garay, G, UNIV CHILE,DEPT ASTRON,CASILLA 36-D,SANTIAGO,CHILE. NR 58 TC 58 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 1996 VL 459 IS 1 PN Part 1 BP 193 EP & PG 17 SC Astronomy & Astrophysics GA TV791 UT ISI:A1996TV79100019 ER PT J AU Tateyama, CE Inoue, M Krichbaum, TP Baath, LB Kameno, S Rogers, AEE Alberdi, A Backer, DC Bartel, N Booth, RS Burke, BF Carlstrom, JE Dhawan, V Dickman, RL Emerson, DT Hirabayashi, H Hodges, MW Graham, DA Johnston, KJ Kobayashi, H Kus, AJ Padin, S Plambeck, RL Predmore, CR Quirrenbach, A Lawrence, CR Lamb, J Marcaide, JM Morimoto, M Ronnang, BO Shapiro, II Spencer, JH Witzel, A Woody, D Wright, MCH TI Global 3- and 7-mm VLBI observations of OJ 287 SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN LA English DT Article DE BL Lacertae objects; galaxies, active; galaxies, individual (OJ 287); radio sources, variable ID LACERTAE OBJECT OJ-287; POLARIZED RADIO OUTBURSTS; BL LACERTAE; SUPERLUMINAL MOTION; FLUX-DENSITY; 43 GHZ; BLAZARS AB We, present new results from global VLBI observations of the highly active blazar OJ 287 at 7 and 3 mm wavelengths. We show the first map of the mas to sub-mas structure of OJ 287 at 43 GHz and discuss this image in the context with models of the source structure seen at 100 GHz. C1 UNIV SAO PAULO,ESCOLA POLITECN,CRAAE,BR-05424970 SAO PAULO,SP,BRAZIL. MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. ONSALA SPACE OBSERV,S-43900 ONSALA,SWEDEN. NE RADIO OBSERV CORP,HAYSTACK OBSERV,WESTFORD,MA 01886. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02139. INST SPACE & ASTRONAUT SCI,SAGAMIHARA,KANAGAWA 229,JAPAN. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. MIT,CAMBRIDGE,MA 02139. USN,RES LAB,WASHINGTON,DC 20375. NRAO,TUCSON,AZ 85721. CALTECH,OWENS VALLEY OBSERV,PASADENA,CA 91125. RAMAN RES INST,BANGALORE 560012,KARNATAKA,INDIA. NICHOLAS COPERNICUS UNIV,TORUN RADIO OBSERV,TORUN,POLAND. UNIV CALIF BERKELEY,BERKELEY,CA 94720. UNIV MASSACHUSETTS,AMHERST,MA 01003. RP Tateyama, CE, NOBEYAMA RADIO OBSERV,NAO,MINAMISA KU,NAGANO 38413,JAPAN. NR 26 TC 7 PU ASTRONOMICAL SOC JAPAN PI TOKYO PA C/O NATIONAL ASTRONOM OBSERV MITAKA-SHI, TOKYO 181, JAPAN SN 0004-6264 J9 PUBL ASTRON SOC JPN JI Publ. Astron. Soc. Jpn. PY 1996 VL 48 IS 1 BP 37 EP 44 PG 8 SC Astronomy & Astrophysics GA TX404 UT ISI:A1996TX40400007 ER PT J AU Chapellier, E Sadsaoud, H Valtier, JC Mathias, P Garrido, R Alvarez, M Sareyan, JP Chauville, J LeContel, JM TI HR 1328: A cool edge ''Slowly pulsating B star'' SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE stars, variables, other; stars, oscillations; stars, individual, HR 1328 AB We report on the discovery of a photometric variability (in Stromgren u and v filters) of HR 1328, a B8 main-sequence star. Two periods are easily derived, of the order of 0.61 d and 0.77 d. From the position of this star in the HR diagram together with other pulsational characteristics, HR 1328 can be classified as a Slowly Pulsating B star (SPB). Although these stars are found to oscillate in high-order g-modes the relatively short pulsation periods of HR 1328 point towards lower-order g-modes in this case. Together with HD 123515, HR 1328 extends and precises the observational cool edge of the SPB's instability strip. C1 CTR RECH ASTRON ASTROPHYS & GEOPHYS,ALGIERS 16340,ALGERIA. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNAM,NATL ASTRON OBSERV,ENSENADA 22800,BAJA CALIFORNIA,MEXICO. OBSERV MEUDON,URA 335,F-92195 MEUDON,FRANCE. RP Chapellier, E, OBSERV COTE AZUR,DEPT FRESNEL,URA 1361,BP 229,F-06304 NICE 04,FRANCE. NR 15 TC 4 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 1996 VL 307 IS 1 BP 91 EP 94 PG 4 SC Astronomy & Astrophysics GA TZ452 UT ISI:A1996TZ45200016 ER PT J AU McAllister, CB GarciaGarrido, JM GarciaRomera, I Godeas, A Ocampo, JA TI In vitro interactions between Alternaria alternata, Fusarium equiseti and Glomus mosseae SO SYMBIOSIS LA English DT Article DE Arbuscular mycorrhizas; Alternaria alternata; Fusarium equiseti; Glomus mosseae; saprophytic fungi ID ARBUSCULAR MYCORRHIZAL FUNGUS; HYPHAL GROWTH; GERMINATION; SYMBIOSIS; PLANTS AB Germinated spores of the arbuscular mycorrhizas (AM) fungus Glomus mosseae did not affect growth of the saprophytic fungi Alternaria alternata and Fusarium equiseti on water agar. Both saprophytic fungi reduced spore germination of G. mosseae independently of pH changes in the medium. Soluble and volatile substances produced by the saprophytic fungi were involved in the inhibition of spore germination. Although F. equiseti inhibited the germination of G. mosseae spores, hyphal growth was markedly stimulated. The inoculation of maize plants with A, alternata and F. equiseti simultaneously with spores of G, mosseae significantly decreased the percentage of root length colonized by AM fungi, but there was no effect on AM colonization when G. mosseae was introduced before A. alternata and F. equiseti. The number of colony-forming units (CFU) of A. alternata decreased when G. mosseae was established in the root, but was not affected when both microorganisms were inoculated at the same time. The number of CFU of F. equiseti was not affected by the presence of G. mosseae. C1 CSIC,DEPT MICROBIOL,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. UNIV BUENOS AIRES,DEPT CIENCIAS BIOL,RA-1428 BUENOS AIRES,DF,ARGENTINA. NR 29 TC 11 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 1996 VL 20 IS 2 BP 163 EP 174 PG 12 SC Microbiology GA UD816 UT ISI:A1996UD81600004 ER PT J AU Bermudez, M Azcon, R TI Calcium uptake by alfalfa as modified by a mycorrhizal fungus and liming SO SYMBIOSIS LA English DT Article DE Arbuscular mycorrhiza; Ca uptake; legume symbiosis ID VESICULAR-ARBUSCULAR MYCORRHIZAE; PLANTS; ACQUISITION; INFECTION AB The purpose of this experiment was to study the effect of an arbuscular mycorrhizal (AM) fungus on calcium acquisition by Medicago sativa plants grown in a medium at five levels of CaCO3. Determinations of dry matter production and concentrations of N, P, K, Ca and Mg in plant tissues showed that mycorrhizal colonization increased content of N, P and K and overall yield, but decreased the concentration of Ca and Mg in plant shoots. The response of mycorrhizal colonization to different amounts of extractable soil Ca indicated that, while mycorrhiza formation was not sensitive to soil Ca it induced a reduction of Ca in the plant. This study demonstrated that AM fungi modulate the ion ratios and ion balance in the plant. In general, the nutrient/Ca ratios were higher in AM than in non-AM plants. These results show that AM formation enhanced N, P and K and decreased Ca uptake. The mycorrhizal condition affected plant tolerance to nutrient deficiency or excess by modifying uptake. Only in AM plants were differences observed between the effects of varying Ca availability. There was a positive correlation between plant Ca content and nodulation in the mycorrhizal treatments. On the other hand, nodulation was not correlated with N, P and K contents. Calcium amendments had no effect on nodule formation in nonmycorrhizal plants, but nodule production was highly increased in AM plants, particularly at the highest Ca level. The correlation coefficients for parameters related to absorption of nutrients in mycorrhizal plants were highly significant for N and P, as well as for Ca and nodulation. According to our results, the mycorrhizal effect on Ca assimilation was not a simple buffering effect associated with Ca excess. The impact of AM function is dependent on various soil and environmental factors. The mechanisms by which AM fungi are able to alleviate nutrient excess has yet to be understood. Further research will be necessary to elucidate this effect. C1 CSIC,DEPT MICROBIOL,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. UNIV COSTA RICA,CTR INVEST AGRON,SAN JOSE,COSTA RICA. NR 22 TC 4 PU INT SCIENCE SERVICES/BALABAN PUBLISHERS PI REHOVOT PA PO BOX 2039, REHOVOT, ISRAEL SN 0334-5114 J9 SYMBIOSIS JI Symbiosis PY 1996 VL 20 IS 2 BP 175 EP 184 PG 10 SC Microbiology GA UD816 UT ISI:A1996UD81600005 ER PT J AU Marziani, P Sulentic, JW DultzinHacyan, D Calvani, M Moles, M TI Comparative analysis of the high- and low-ionization lines in the broad-line region of active galactic nuclei SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE galaxies, active; galaxies, kinematics and dynamics; line, profiles; quasars, emission lines; ultraviolet, galaxies ID FE-II EMISSION; SPECTROPHOTOMETRIC STANDARDS; REDSHIFT DIFFERENCE; VLA OBSERVATIONS; RADIO-SOURCES; PROFILES; QSOS; STATISTICS; QUASARS; CLOUDS AB We present the first comparative study of high- and low-ionization lines in a large sample of active galactic nuclei(AGNs). We report measurements of C IV lambda 1549, He II lambda 1640, and O III] lambda 1663 paired to measurements of H beta, He II lambda 4686, and Fe IIopt in 52 low-redshift AGNs (z less than or similar to 0.8). Ultraviolet archival spectra covering the region of C IV lambda 1549 were obtained with the Faint Object Spectrograph (FOS) on the Hubble Space Telescope (HST). Moderate-resolution optical spectra (approximate to 4-7 Angstrom) were obtained in most cases within two years of the HST observations. We present an atlas of matching C IV lambda 1549 and H beta broad-line profiles. Velocity centroids at different profile heights and other profile properties were measured after removal of narrow-line components and contaminating satellite lines of other elements. Our results add refinements to the ''standard view'' of nebular conditions in the broad-line region (BLR). (1) The average electron density is most probably weighted toward values higher than expected in standard BLR models. The weakness of O III] lambda 1663 and N IV] lambda 1486 relative to He II lambda 1640 suggest that the semiforbidden lines are collisionally de-excited at n(e) greater than or similar to 10(10.5) cm(-3). (2) There is evidence, supporting earlier work, that photoionization via Ly alpha fluorescence plays a major role in the production of Fe IIUV. We identify and discuss briefly the Fe IIUV multiplets in the range 1550-1750 Angstrom. (3) The observational distinction between the narrow- and broad-line regions is blurred by the contribution of a region of intermediate density (10(6) cm(-3) less than or similar to n(e) less than or similar to 10(7) cm(-3)). Best evidence for this emission comes from the [O III] lambda 4363 and C IV lambda 1549 profiles. It is most likely associated with the innermost part of the narrow-line region. Comparisons between the broad-line profile of C IV lambda 1549, H beta and, whenever possible, He II lambda 1640 suggest (1) that radio-loud and radio-quiet AGNs are very different classes of objects that should be treated separately, and (2) that ionization structure varies within the velocity field. The extreme radial velocity emission is characterized by a high-ionization spectrum dominated by C IV lambda 1549 and He II. Several basic results are: (i) C IV lambda 1549 is almost always blueshifted with respect to H beta. (ii) There is a fundamental kinematic difference between radio-loud and radio-quiet objects relative to the rest frame of the AGN. (iii) Radio-loud objects show predominantly redshifted and asymmetric H beta and unshifted symmetric C IV lambda 1549. (iv) Radio-quiet objects show predominantly blueshifted and asymmetric C IV profiles with H beta usually symmetric and unshifted. Correlation analysis of the radio-quiet sample suggests that C IV lambda 1549 EW, C IV lambda 1549 shift/asymmetry, and the strength of Fe IIopt are related. C IV lambda 1549 profiles with large blueshift/asymmetry show lower EW and stronger Fe IIopt emission. The results suggest that C IV lambda 1549 and H beta arise in different velocity/geometry regimes. C IV lambda 1549 may be predominantly emitted in an outflowing bicone of large aperture (similar to 45 degrees), while Fe IIopt is most probably emitted in a strongly flattened geometry (possibly an accretion disk). Bulk H beta emission may come from a less flattened configuration of clouds. In this interpretation, the flux ratio Fe IIopt/H beta(BC) is an aspect indicator for radio-quiet objects. Radio-loud objects are more enigmatic, and the existence of a reliable optical aspect indicator remains uncertain. There is evidence that line profile properties of C IV lambda 1549 and HP are ''coupled'' in the radio-loud sample, suggesting that a common origin for the high- and low-ionization line emission is a possibility. If this is true, however, we do not have a reasonable explanation for the predominance of H beta redshifts and red asymmetries in that population. C1 UNIV ALABAMA,DEPT PHYS & ASTRON,TUSCALOOSA,AL 35487. UNIV NACL AUTONOMA MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV PADUA,DIPARTIMENTO ASTRON,I-35122 PADUA,ITALY. NR 54 TC 110 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL SER JI Astrophys. J. Suppl. Ser. PD MAY PY 1996 VL 104 IS 1 BP 37 EP 70 PG 34 SC Astronomy & Astrophysics GA UG195 UT ISI:A1996UG19500002 ER PT J AU Victora, CG Barros, FC Halpern, R Menezes, AMB Horta, BL Tomasi, E Weiderpass, E Cesar, JA Olinto, MT Guimaraes, PRV Garcia, MD Vaughan, JP TI Longitudinal study of the mother and child population in an urban region of southern Brazil, 1993: Methodological aspects and preliminary results SO REVISTA DE SAUDE PUBLICA LA Portuguese DT Article DE maternal and child health; longitudinal studies; research, methods AB All babies born in the hospitals of the city of Pelotas, Brazil, in 1982 were studied soon after delivery and followed up prospectively during the first years of their fives. in 1993, this study was repeated with a similar methodology, with the aim of assessing eventual changes in the level of maternal and child health. All five maternity hospitals in the city were visited daily and the 5,304 babies born included in the study. They were weighed and measured, and their gestational age was assessed using the Dubowitz method. Their mothers were examined and interviewed regarding a large number of risk factors. The mortality of these children was studied through the surveillance of all hospitals, cemeteries and death registries, and all hospital admissions were also recorded. Two nested case-control studies were carried out to assess risk factors for mortality and hospital morbidity. A systematic sample of 655 children were examined at home at one and three months of age, and these infants, as well as another sample of 805 children including all low-birthweight babies were also examined at the ages of six and twelve months. Their psychomotor development was also assessed. Losses to follow-up were only 6.6% at twelve months. Relative to the 1982 indicators, perinatal mortality fell by about 30% and infant mortality by almost 50%. The median duration of breastfeeding increased from 3.1 to 4.0 months. On the other hand, there was little change in the prevalences of low birthweight or of length for age at twelve months. The article that refers this abstract describes the methodology of the study and forthcoming publications will present detailed results. C1 ESCUELA ANDALUZA SALUD PUBL,GRANADA,SPAIN. LONDON SCH HYG & TROP MED,DEPT PUBL HLTH & POLICY,LONDON,ENGLAND. UNIV FED RIO GRANDE SUL,DEPT MATERNO INFANTIL,RIO GRANDE,RS,BRAZIL. RP Victora, CG, UNIV FED PELOTAS,FAC MED,DEPT SOCIAL MED,CAIXA POSTAL 464,BR-96001970 PELOTAS,RS,BRAZIL. NR 15 TC 27 PU REVISTA DE SAUDE PUBLICA PI SAO PAULO PA FACULDADE SAUDE PUBL DA USP, AV DR ARNALDO 715, 01255 SAO PAULO, BRAZIL SN 0034-8910 J9 REV SAUDE PUBL JI Rev. Saude Publica PD FEB PY 1996 VL 30 IS 1 BP 34 EP 45 PG 12 SC Public, Environmental & Occupational Health GA UL645 UT ISI:A1996UL64500005 ER PT J AU SoberonChavez, G Campos, J Haidour, A Ramos, JL Ortigoza, J TI Selection and preliminary characterization of a Pseudomonas aeruginosa strain mineralizing selected isomers in a branched-chain dodecylbenzenesulphonate mixture SO WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY LA English DT Article DE dodecylbenzenesulphonate; Pseudomonas aeruginosa; surfactant biodegradation ID LINEAR ALKYLBENZENE SULFONATE; PLASMID; BIODEGRADATION; BACTERIA; RANGE AB A bacterium able to grow at the expense of some isomers in a commercial surfactant preparation consisting of branched-chain dodecylbenzenesulphonate was isolated (W51), and it was identified as a Pseudomonas aeruginosa strain. A faster growing derivative was selected (W51D) after enrichment in batch culture under microaerobic conditions, using the surfactant as the sole source of carbon and energy, Strain W51D is the first microorganism reported to degrade at least 70% of a branched-chain alkylbenzenesulphonate mixture and to be resistant to high concentrations of this surfactant. The ability to degrade the surfactant was shown to be transferred by conjugation to other P. aeruginosa strains and to an Escherichia coli strain. C1 CSIC,ESTAC EXPTL ZAIDIN,E-18008 GRANADA,SPAIN. INST POLITECN NACL,ESCUELA NACL CIENCIAS BIOL,MEXICO CITY 11340,DF,MEXICO. RP SoberonChavez, G, UNIV NACL AUTONOMA MEXICO,INST BIOTECHNOL,APDO POSTAL 510-3,CUERNAVACA 62250,MORELOS,MEXICO. NR 30 TC 7 PU RAPID SCIENCE PUBLISHERS PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8NH SN 0959-3993 J9 WORLD J MICROBIOL BIOTECHNOL JI World J. Microbiol. Biotechnol. PD JUL PY 1996 VL 12 IS 4 BP 367 EP 372 PG 6 SC Biotechnology & Applied Microbiology GA UU256 UT ISI:A1996UU25600009 ER PT J AU Morales, J Singh, SK Ordaz, M TI Analysis of the Granada (Spain) earthquake of 24 June, 1984 (M=5) with emphasis on seismic hazard in the Granada Basin SO TECTONOPHYSICS LA English DT Article ID SPECTRAL ATTENUATION; WAVES; MEXICO; MOTION AB The earthquake of 24 June, 1984, with epicenter in the Granada Basin (36.86 degrees N, 3.76 degrees W; H = 12 km; m(b) = 4.9), was the first event to produce accelerograms in Spain. It was recorded at three sites, Beznar, Alhama, and Santa Fe, within about 40 km of the epicenter. It was also recorded by three NARS network stations (NE11, NE13 and NE14), which were in operation in Spain at the time. The data from Alhama and NE14, however, are not usable because of instrumental problems, The fact that the epicenter of the 1984 event was relatively close to the highly destructive earthquake of 25 December 1884 (M = 6.7-7.1) makes the source study of the 1984 event very interesting and useful. By synthetic modelling of the regional seismograms at NE11, NE13 and Toledo, the seismic moment is estimated as 3.0 x 10(23) dyne-cm (M(w) = 5.0). Source spectra estimated from accelerograms at Beznar and Santa Fe suggest that Holocene sediments (200 m in thickness) at Santa Fe may cause broadband amplification of about 10. From the spectra obtained from the Beznar accelerogram, the corner frequency is estimated as 1 Hz, which gives a stress drop of about 100 bar. We have synthesized expected ground motions at Santa Fe and Beznar from a postulated M(w) = 7.0 earthquake (similar to the 1884 event) using recordings of the 1984 event as empirical Green's functions. The simulations suggest that the horizontal accelerations during the postulated event may be 8-10 times greater than those observed during the 1984 event, exceeding 1/4 g at Santa Fe. Because of their close proximity and similar subsoil conditions, estimations at Santa Fe may also be valid for the lower part of the city of Granada. We finally compare the expected response spectra for the postulated event with the proposed design spectra. C1 FAC CIENCIAS,DEPT FIS TEOR & COSMOS,GRANADA,SPAIN. UNAM,INST GEOFIS,MEXICO CITY,DF,MEXICO. UNAM,INST INGN,MEXICO CITY,DF,MEXICO. CTR NACL PREVENC DESASTRES,MEXICO CITY,DF,MEXICO. RP Morales, J, INST ANDALUZ GEOFIS,APARTADO 2145,E-18080 GRANADA,SPAIN. NR 24 TC 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-1951 J9 TECTONOPHYSICS JI Tectonophysics PD JUN 7 PY 1996 VL 257 IS 2-4 BP 253 EP 263 PG 11 SC Geochemistry & Geophysics GA UV588 UT ISI:A1996UV58800009 ER PT J AU Launhardt, R Mezger, PG Haslam, CGT Kreysa, E Lemke, R Sievers, A Zylka, R TI Dust emission from star-forming regions .4. Dense cores in the Orion B molecular cloud SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE interstellar medium; dust, clouds, individual (Lynds 1630); stars, formation of ID PROTOSTELLAR CORES; PROTOSTARS; NGC-2071; RESOLUTION; COMPLEXES; SEARCH AB In a search for isothermal pre-stellar cores and protostars we surveyed with SEST and IRAM MRT part of the Orion B GMC for its lambda 1.3 mm dust emission. We used the CS(2-1) survey by Lada et al. (1991a; LBS) as a search list. We determine the morphology of the detected cloud cores with angular resolutions of 23 '' (SEST) and 12 '', respectively. About one half of these cores have a compact core surrounded by an extended envelope. The lambda 1.3 mm dust emission maps were compared with NIR (2.13 mu m) and FIR (IRAS) maps to discriminate between isothermal and self-luminous cores. About one half of the cores were classified as isothermal. A comparison of virial masses derived from CS line widths with gas masses derived from lambda 1.3 mm dust emission shows that virial masses are on average by a factor of 20 ... 30 larger. This can be explained by line opacity and by the larger beamwidths (1.8' vs. 23 '' and 1 '''', respectively) of the CS survey. C1 MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. IRAM,E-18012 GRANADA,SPAIN. EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. RP Launhardt, R, MAX PLANCK SOC,RES UNIT DUST STAR FORMING REG,SCHILLERGASSCHEN 3,D-07754 JENA,GERMANY. NR 40 TC 28 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 1996 VL 312 IS 2 BP 569 EP 584 PG 16 SC Astronomy & Astrophysics GA VC333 UT ISI:A1996VC33300029 ER PT J AU Irisarri, P Milnitsky, F Monza, J Bedmar, EJ TI Characterization of rhizobia nodulating Lotus subbiflorus from Uruguayan soils SO PLANT AND SOIL LA English DT Article DE Bradyrhizobium; carbon utilization; ELISA; Lotus subbiflorus; native isolates; protein profiles; Rhizobium; symbiotic effectiveness ID ROOT NODULE BACTERIA; NITROGEN-FIXATION; MELILOTI; PLASMID; GENETICS; GENES; IDENTIFICATION; LEGUMINOSARUM; BIOCHEMISTRY; HYDROGENASES AB Generation times, acid production, carbon utilization, immunological properties, plasmid content, protein profile and symbiotic properties of 15 isolates of rhizobia nodulating Lotus subbiflorus were studied. Based on specific growth rates, carbon source utilization and acid production, 13 out of the 15 isolates could be assigned to the slow-growing group of rhizobia (bradyrhizobia). Using antisera against whole cells of three isolates, we separated the 15 isolates into three serogroups. Only the slow-growing isolate Ls4 and the fast-growers Ls5 and Ls552 lacked cross-reactivity with any of the sera tested. Electrophoretic mobilities of whole cell protein from seven out of the eight isolates included in the serogroup represented by strain Ls31 were identical. Similarly, isolates Ls1B3 and Ls 1B4, both in serogroup Ls 1B3, had the same pattern of cell proteins. In contrast, isolates Ls3 and Ls7, belonging to serogroup Ls7, differed in protein profile. Plant growth experiments carried out under bacteriologically controlled conditions revealed that all of the isolates effectively nodulated L. subbiflorus and L. pedunculatus, but were unable to form effective nodules on L. tenuis and L. corniculatus. All isolates showed similar effectiveness in symbiosis with L. subbiflorus, except isolate Ls7, which gave significantly higher plant dry weight. C1 CSIC,DEPT MICROBIOL SUELO & SISTEMAS SIMBIOT,ESTAC EXPT ZADIN,GRANADA 18080,SPAIN. RP Irisarri, P, FAC AGRON,DEPT BIOQUIM,GARZON 780,MONTEVIDEO 12900,URUGUAY. NR 38 TC 13 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0032-079X J9 PLANT SOIL JI Plant Soil PD MAR PY 1996 VL 180 IS 1 BP 39 EP 47 PG 9 SC Agronomy; Plant Sciences; Soil Science GA VD848 UT ISI:A1996VD84800005 ER PT J AU Baez, M Rodriguez, M Lastra, O Pena, A DelaColina, C Rasero, FS TI Pesticide residues in surface waters of the V Region, Chile. Prospective study SO BOLETIN DE LA SOCIEDAD CHILENA DE QUIMICA LA Spanish DT Article ID SOLID-PHASE EXTRACTION; GAS-CHROMATOGRAPHY; NITROGEN-PHOSPHORUS; GROUNDWATER; SAMPLES AB A study was done of seasonal variations of pesticide contents in waters of the Aconcagua river basin and Aromos dam in the V Region of Chile by solid phase extraction (SPE) and chromatographic determination with GC-ECD, GC-FPD and HPLC-DAD. The waters of the Aconcagua river get contaminated as a result of phytosanitary treatments from San Felipe to the mouth in Concon with the pesticides lindane, diazinon, oxyfluorfen and dicofol at levels below the international standard, and with azinphos-methyl, methabenzthiazuron, lenacil, diflubenzuron and atrazine at levels above the European standards. Waters flowing into the valley are free from pesticide as far as Los Andes. At Aromos dam atrazine coming from Limache valley was quantified at minimum levels. The environmental behaviour of these pesticides was estimated by the log P-OW index, the physical chemical characteristics of the waters, and regional rainfall. C1 CSIC,ESTAC EXPT ZAIDIN,SECC QUIM ANALIT,GRANADA,SPAIN. RP Baez, M, UNIV CHILE,FAC CIENCIAS QUIM & FARMACEUT,DEPT QUIM INORGAN & ANALIT,CASILLA 233,SANTIAGO 1,CHILE. NR 20 TC 5 PU SOCIEDAD CHILENA DE QUIMICA PI CONCEPCION PA CASILLA 2613, CONCEPCION, CHILE SN 0366-1644 J9 BOL SOC CHIL QUIM JI Bol. Soc. Chilena Quim. PD SEP PY 1996 VL 41 IS 3 BP 271 EP 276 PG 6 SC Chemistry, Multidisciplinary GA VM536 UT ISI:A1996VM53600011 ER PT J AU Clarke, M Collins, R Davies, C Godwin, J Gray, R Peto, R Abe, O Abe, R Enomoto, K Kikuchi, K Koyama, H Nomura, Y Sakai, K Sugimachi, K Tominaga, T Uchino, J Yoshida, M vandeVelde, AO vanDongen, JA Vermorken, JB Arvelakis, A Giokas, G Lissaios, B Harvey, VJ Holdaway, TM Kay, RG Mason, BH Coates, A Forbes, JF Focan, C Lobelle, JP Peek, U Oates, GD Powell, J Bastert, G Rauschecker, H Sauer, R Sauerbrei, W Schauer, A Schumacher, M Durand, M Mauriac, L Bartholomeus, S Piccart, MJ Gelman, RS Henderson, IC Shapiro, CL Hancock, AK Masood, MB Parker, D Price, JJ Jackson, S Ragaz, J Delozier, T MaceLesech, J Haybittle, JL Cirrincione, C Korzun, A Weiss, RB Wood, WC Baum, M Houghton, J Riley, D Dent, DM Gudgeon, CA Hacking, A Horgan, K Hughes, L Stewart, HJ Gordon, NH Davis, HL Lehingue, Y Owen, JR Meier, P Howell, A Ribeiro, GC Swindell, R Albano, J deOliveira, CF Gervasio, H Gordilho, J Carstensen, B Palshof, T Johansen, H Korzeniowski, S Skolyszewski, J Andersen, KW Axelsson, CK BlichertToft, M Mouridsen, HT Overgaard, M Rose, C Corcoran, N Trampisch, HJ Abeloff, MD Carbone, PC Glick, J Tormey, DC Rossbach, J Scanlon, EF Schurman, S deSchryver, A Yosef, HMA McArdle, CS Smith, DC Lara, PC Boccardo, F Erazo, A Medina, JY Izuo, M Morishita, Y Bentley, A Doran, Z Fentiman, IS Hayward, JL Rubens, RD Kaufmann, M Jonat, W Scheurlen, H vonFournier, D Fountzilas, G Klefstrom, P Blomqvist, C Cuzick, J Margreiter, R Castiglione, M Cavalli, F Collins, J Forbes, J Gelber, RD Goldhirsch, A Lindtner, J Price, KN Rudenstam, CM Senn, HJ Bliss, JM Chilvers, CED Coombes, RC Marty, M Borovik, R Brufman, G Hayat, H Robinson, E Wigler, N Pannuti, F Takashima, S Tasutomi, T Sonoo, H Yamashita, J Ogawa, M Hupperets, PSGJ Bonte, J Tengrup, I TennvallNittby, L Martin, P Romain, S Ahmann, D Schaid, DJ Buzdar, AU Smith, T Hakes, T Norton, L Wittes, R delaHuerta, R Sainz, MG Bonadonna, G delVecchio, M Valagussa, P Veronesi, U Dubois, JB Bianco, AR Lippman, ME Pierce, LJ Simon, R Steinberg, SM Brown, A Fisher, B Redmond, C Wolmark, N Jackson, IM Palmer, MK Ingle, JN Suman, VJ Bengtsson, NO Larsson, LG Lythgoe, JP Kissin, M Hannisdal, E Varhaug, JE NissenMeyer, R Blamey, RW Mitchell, AK Robertson, JFR Nakamura, Y Mathe, G Misset, JL AbuZahra, HT Clarke, EA McLaughlin, JR Clark, RM Levine, M Myles, JD Pater, JL Pritchard, KI Morimoto, K Sawa, K Takatsuka, Y Gundersen, S HauerJensen, M Host, A Crossley, E Durrant, K Harris, A Beighton, A Collins, R Evans, V Greaves, E Harwood, C James, S Lau, E Mead, G Muldal, A Naughton, A Tooth, A Wheatley, K Rambert, P Asselain, B Salmon, RJ Vilcoq, JR Arriagada, R Hill, C Laplanche, A Le, MG Speilmann, M Cocconi, G diBlasio, B Catalano, R Creech, RH Brockschmidt, J Cooper, MR Andrysek, O Barkmanova, J Falkson, CJ Abraham, M Klijn, JGM TreurnietDonker, AD vanPutten, WLJ Easton, D Powles, TJ Gazet, JC Semiglazov, V Deshpande, N diMartino, L Douglas, P Host, H Bryant, AJS Ewing, GH KrushenKosloski, JL Forrest, APM Jack, W McDonald, C Moller, TR Ryden, S Carstensen, J Hatschek, T Soderberg, M Carpenter, JT Albain, K Crowley, J Green, S Martino, S Osborne, CK Ravdin, PM Rutqvist, LE Wallgren, A Holm, LE Yoshimoto, M DeBoer, G Paterson, AHG Meakin, JW Panzarella, T Naja, A Bahi, J Reid, M Spittle, M Senanayake, F Bergh, J Holmberg, L Sevelda, P Zielinsky, CC Jakesz, R Gnant, M Buchanan, RB Cross, M Dunn, JA Gillespie, WM Kelly, K Morrison, JM Litton, A Chlebowski, RT Bezwoda, WR Caffier, H TI Ovarian ablation in early breast cancer: Overview of the randomised trials SO LANCET LA English DT Article AB Background Among women with early breast cancer, the effects of ovarian ablation on recurrence and death have been assessed by several randomised trials that now have long follow-up. In this report, the Early Breast Cancer Trialists' Collaborative Group present their third 5-yearly systematic overview (meta-analysis), now with 15 years' follow-up. Methods in 1995, information was sought on each patient in any randomised trial of ovarian ablation or suppression versus control that began before 1990. Data were obtained for 12 of the 13 studies that assessed ovarian ablation by irradiation or surgery, all of which began before 1980, but not for the four studies that assessed ovarian suppression by drugs, all of which began after 1985. Menopausal status was not consistently defined across trials; therefore, the main analyses are limited to women aged under 50 (rather than ''premenopausal'') when randomised. Oestrogen receptors were measured only in the trials of ablation plus cytotoxic chemotherapy versus the same chemotherapy alone. Findings Among 2102 women aged under 50 when randomised, most of whom would have been premenopausal at diagnosis, 1130 deaths and an additional 153 recurrences were reported. 15-year survival was highly significantly improved among those allocated ovarian ablation (52 . 4 vs 46 . 1%, 6 . 3 [SD 2 . 3] fewer deaths per 100 women, logrank 2p=0 . 001), as was recurrence-free survival (45 . 0 vs 39 . 0%, 2p=0 . 0007). The numbers of events were too small for any subgroup analyses to be reliable. The benefit was, however, significant both for those with (''node positive'') and for those without (''node negative'') axillary spread when diagnosed. In the trials of ablation plus cytotoxic chemotherapy versus the same chemotherapy alone, the benefit appeared smaller (even for women with oestrogen receptors detected on the primary tumour) than in the trials of ablation in the absence of chemotherapy (where the observed survival improvements were about six per 100 node-negative women and 12 per 100 node-positive women). Among 1354 women aged 50 or over when randomised, most of whom would have been perimenopausal or postmenopausal, there was only a non-significant improvement in survival and recurrence-free survival. Interpretation In women aged under 50 with early breast cancer, ablation of functioning ovaries significantly improves long-term survival, at least in the absence of chemotherapy. Further randomised evidence is needed on the additional effects of ovarian ablation in the presence of other adjuvant treatments, and to assess the relevance of hormone-receptor measurements. C1 AMSTERDAM INTEGRAAL KANKERCTR,AMSTERDAM,NETHERLANDS. ATHENS METAXAS MEM CANC HOSP,ATHENS,GREECE. AUCKLAND BREAST CANC STUDY GRP,AUCKLAND,NEW ZEALAND. CARDIFF SURG TRIALISTS,CARDIFF,S GLAM,WALES. BERLIN BUCH AKAD WISSENSCH,BERLIN,GERMANY. BIRMINGHAM GEN HOSP,BIRMINGHAM,W MIDLANDS,ENGLAND. BMFT FREIBERG,FREIBERG,GERMANY. BORDEAUX INST BERGONIE,BORDEAUX,FRANCE. DANA FARBER CANC INST,BOSTON,MA 02115. BRADFORD ROYAL INFIRM,BRADFORD BD9 6RJ,W YORKSHIRE,ENGLAND. BRITISH COLUMBIA CANC AGCY,VANCOUVER,BC V5Z 4E6,CANADA. CAEN CTR REG FRANCOIS BACLESSE,CAEN,FRANCE. ADDENBROOKES HOSP,CAMBRIDGE,ENGLAND. CANC & LEUKEMIA GRP B,DURHAM,NC. CANC RES CAMPAIGN,LONDON SW1Y 5AR,ENGLAND. GROOTE SCHUUR HOSP,ZA-7925 CAPE TOWN,SOUTH AFRICA. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. CTR LEON BERARD,F-69373 LYON,FRANCE. CHELTENHAM GEN HOSP,CHELTENHAM,GLOS,ENGLAND. UNIV CHICAGO,CHICAGO,IL 60637. CHRISTIE HOSP & HOLT RADIUM INST,MANCHESTER M20 9BX,LANCS,ENGLAND. COIMBRA INST ONCOL,COIMBRA,PORTUGAL. DANISH CANC REGISTRY,COPENHAGEN,DENMARK. COPENHAGEN RADIUM CTR,COPENHAGEN,DENMARK. CRACOW INST ONCOL,KRAKOW,POLAND. ST LUKES HOSP,DUBLIN,IRELAND. UNIV DUSSELDORF,D-4000 DUSSELDORF,GERMANY. EASTERN COOPERAT ONCOL GRP,BOSTON,MA. EUROPEAN ORG RES TREATMENT CANC,BRUSSELS,BELGIUM. NORTHWESTERN UNIV,EVANSTON HOSP,EVANSTON,IL 60201. STATE UNIV GHENT HOSP,B-9000 GHENT,BELGIUM. WESTERN INFIRM & ASSOCIATED HOSP,BEATSON ONCOL CTR,GLASGOW G11 6NT,LANARK,SCOTLAND. GLASGOW VICTORIA INFIRM,GLASGOW,LANARK,SCOTLAND. GRANADA UNIV HOSP,GRANADA,SPAIN. GUADALAJARA HOSP 20 NOVIEMBRE,GUADALAJARA,JALISCO,MEXICO. GUNMA UNIV,MAEBASHI,GUMMA 371,JAPAN. GUYS HOSP,LONDON SE1 9RT,ENGLAND. HEIDELBERG UNIV 1,HEIDELBERG,GERMANY. HEIDELBERG UNIV 2,HEIDELBERG,GERMANY. HELLENIC COOPERAT ONCOL GRP,ATHENS,GREECE. HELSINKI DEACONESS MED CTR,HELSINKI,FINLAND. UNIV HELSINKI,FIN-00014 HELSINKI,FINLAND. IMPERIAL CANC RES FUND,LONDON WC2A 3PX,ENGLAND. INNSBRUCK UNIV,A-6020 INNSBRUCK,AUSTRIA. LUDWIG INT BREAST CANC STUDY GRP,EPALINGES,SWITZERLAND. INT COLLABORAT CANC GRP,LONDON,ENGLAND. ISRAEL NSABC,JERUSALEM,ISRAEL. KAWASAKI MED UNIV,KAWASAKI,KANAGAWA,JAPAN. KUMAMOTO UNIV GRP,KUMAMOTO,JAPAN. KYUSHU NATL CANC CTR,FUKUOKA,JAPAN. BREAST CANC STUDY GRP COMPREHENS CANC CTR,LIMBURG,NETHERLANDS. ACAD ZIEKENHUIS ST RAFAEL,LOUVAIN,BELGIUM. MARSEILLE LAB CANCEROL BIOL APM,MARSEILLE,FRANCE. MAYO CLIN,ROCHESTER,MN 55905. UNIV TEXAS,MD ANDERSON CANC CTR,HOUSTON,TX. MEXICAN NATL MED CTR,MEXICO CITY,DF,MEXICO. IST NAZL STUDIO & CURA TUMORI,I-20133 MILAN,ITALY. CTR PAUL LAMARQUE,MONTPELLIER,FRANCE. UNIV NAPLES,I-80138 NAPLES,ITALY. NCI,BETHESDA,MD 20892. NORTHWICK PK HOSP & CLIN RES CTR,HARROW HA1 3UJ,MIDDX,ENGLAND. NORWEGIAN RADIUM HOSP,OSLO,NORWAY. CITY HOSP NOTTINGHAM,NOTTINGHAM,ENGLAND. OITA PREFECTURAL HOSP,OITA,JAPAN. ONTARIO CANC TREATMENT & RES FDN,TORONTO,ON,CANADA. ONTARIO CLIN ONCOL GRP,HAMILTON,ON,CANADA. CANADA CLIN TRIALS GRP,ONTARIO NATL CANC INST,KINGSTON,ON,CANADA. OSAKA CITY UNIV,OSAKA 558,JAPAN. OSAKA NATL HOSP,OSAKA,JAPAN. OSLO RADIUM HOSP,OSLO,NORWAY. OXFORD CHURCHILL HOSP,OXFORD,ENGLAND. OXFORD ICRF MRC CLIN TRIAL SERV UNIT,OXFORD,ENGLAND. CTR RENE HUGUENIN,PARIS,FRANCE. INST CURIE,PARIS,FRANCE. INST GUSTAVE ROUSSY,PARIS,FRANCE. PARMA HOSP,PARMA,ITALY. FOX CHASE CANC CTR,PHILADELPHIA,PA 19111. PIEDMONT ONCOL ASSOC,WINSTON SALEM,NC. CHARLES UNIV,PRAGUE,CZECH REPUBLIC. UNIV PRETORIA,ZA-0002 PRETORIA,SOUTH AFRICA. INST CARDIOVASC ROSARIO,ROSARIO,ARGENTINA. DR DANIEL DEN HOED CANC CTR,NL-3008 AE ROTTERDAM,NETHERLANDS. ROYAL MARSDEN HOSP,CANC RES INST,LONDON,ENGLAND. UNIV LONDON ST GEORGES HOSP,LONDON SW17 0RE,ENGLAND. ST PETERSBURG PETROV RES INST ONCOL,ST PETERSBURG,RUSSIA. SARDINIA ONCOL HOSP A BUSINICO,SARDINIA,ITALY. SASKATCHEWAN CANC FDN,SASKATOON,SK,CANADA. SCOTTISH CANC TRIALS OFF,EDINBURGH,MIDLOTHIAN,SCOTLAND. SW ONCOL GRP,KANSAS CITY,KS. STOCKHOLM BREAST CANC STUDY GRP,STOCKHOLM,SWEDEN. KAROLINSKA HOSP,S-10401 STOCKHOLM,SWEDEN. SAKK & OSAKO,SWISS GRP CLIN CANC RES,BERN,SWITZERLAND. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. CANC INST HOSP,TOKYO,JAPAN. TORONTO EDMONTON BREAST CANC STUDY GRP,TORONTO,ON,CANADA. PRINCESS MARGARET HOSP,TORONTO,ON M4X 1K9,CANADA. CTR CLAUDIUS REGAUD,TOULOUSE,FRANCE. INST SALAH AZAIZ,TUNIS,TUNISIA. UPPSALA OREBRO CANC STUDY GRP,UPPSALA,SWEDEN. UNIV HOSP VIENNA,DEPT GYNAECOL 1,VIENNA,AUSTRIA. UNIV HOSP VIENNA,DEPT SURG,VIENNA,AUSTRIA. UNIV WITWATERSRAND,ZA-2050 WITWATERSRAND,SOUTH AFRICA. UNIV WURZBURG,D-97070 WURZBURG,GERMANY. RP Clarke, M, RADCLIFFE INFIRM,CLIN TRIAL SERV UNIT,OXFORD OX2 6HE,ENGLAND. NR 17 TC 282 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD NOV 2 PY 1996 VL 348 IS 9036 BP 1189 EP 1196 PG 8 SC Medicine, General & Internal GA VQ467 UT ISI:A1996VQ46700009 ER PT J AU Monzon, A Azcon, R TI Relevance of mycorrhizal fungal origin and host plant genotype to inducing growth and nutrient uptake in Medicago species SO AGRICULTURE ECOSYSTEMS & ENVIRONMENT LA English DT Article DE arbuscular mycorrhiza; Medicago species; autoctone endophytes; Glomus species ID BRADYRHIZOBIUM STRAINS; SOYBEAN CULTIVARS; EXTERNAL HYPHAE; CICER-ARIETINUM; COLONIZATION; INFECTION; INOCULATION; DEPENDENCY; ENDOPHYTES; SYMBIOSIS AB This study reports the effects of three selected arbuscular mycorrhizal- (AM-) forming species (Glomus mosseae, Glomus fasciculatum or Glomus caledonium) in comparison with autoctone endophytes by determining changes in plant growth, nutritional and symbiotic parameters in four species of Medicago: M. trunculata, M. rigidula, M. polimorpha and M. rotata, The relative susceptibility to and dependence upon AM fungi of Medicago species was also evaluated. Results showed a high functional compatibility between Medicago species and autoctone endophytes, and a specific plant response to individual Glomus species. Differences among the Medicago species in their reaction to Glomus species ranged from negative to highly positive. A combination of host and AM fungal species indicates that a specific compatibility exists among symbionts. Nutrient uptake as a result of AM colonization also indicated a wide degree of responsiveness in each species according to the associated fungal symbiont to the plant, A positive effect on N, P and K, and negative on Ca and Mg nutrition was found in all mycorrhizal treatments, especially with the autoctone endophytes. Mycorrhizal infectivity could not be related to endophyte effectiveness, with generally fewer and larger Rhizobium nodules found on the most effective mycorrhizal treatments. Results support the role of indigenous AM endophytes in the efficacy of mycorrhizal symbiosis and the importance of host-endophyte selection to maximize growth and nutrition of Medicago. This study shows that AM symbiotic efficiency attributed to Medicago is dependent on endophyte association and plant species. The importance of selecting suitable AM fungi is of practical interest for improving the effectiveness of the tripartite symbiosis. C1 CSIC,ESTAC EXPTL ZAIDIN,DEPT MICROBIOL SUELO & SISTEMAS SIMBIOT,E-18008 GRANADA,SPAIN. RP Monzon, A, UNIV BUENOS AIRES,FAC AGRON,CATEDRA MICROBIOL,RA-1417 BUENOS AIRES,DF,ARGENTINA. NR 27 TC 20 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8809 J9 AGR ECOSYST ENVIRON JI Agric. Ecosyst. Environ. PD NOV PY 1996 VL 60 IS 1 BP 9 EP 15 PG 7 SC Agriculture, Multidisciplinary; Ecology; Environmental Sciences GA VZ127 UT ISI:A1996VZ12700002 ER PT J AU Anglada, G Rodriguez, LF Torrelles, JM TI A thermal radio jet associated with the quadrupolar molecular outflow in L723 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, individual (L723); ISM, jets and outflows; radio continuum, ISM; stars, formation ID IRAS 16293-2422; CONTINUUM; BIPOLAR; DISKS; CORE AB We have carried out VLA observations at subarcsecond resolution of the two radio continuum sources detected previously at lower angular resolution toward the center of the quadrupolar molecular outflow in L723. While the source VLA 1 appears unresolved at our angular resolution of similar to 0.'' 3, the source VLA 2 appears as clearly elongated approximately along the direction of the larger pair of lobes of the molecular outflow. This alignment, and the flux density and deconvolved angular size dependences with frequency observed between 3.6 and 6 cm, are consistent with VLA 2 being a thermal radio jet and suggest that this source is related to the excitation of the larger pair of outflow lobes. Under this interpretation, the second, more compact lobe pair most probably constitutes an independent bipolar outflow, whose exciting source is still to be determined. C1 UNIV BARCELONA,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP Anglada, G, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 28 TC 17 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1996 VL 473 IS 2 PN Part 2 BP L123 EP L126 PG 4 SC Astronomy & Astrophysics GA VZ154 UT ISI:A1996VZ15400016 ER PT J AU Chini, R Reipurth, B WardThompson, D Bally, J Nyman, LA Sievers, L Billawala, Y TI Dust filaments and star formation in OMC-2 and OMC-3 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, clouds; ISM, individual (OMC-2, OMC-3); stars, formation ID MOLECULAR CLOUD; ORION; SUBMILLIMETER; CORES; CS AB We have mapped the 1300 mu m dust emission of a 6' X 16' field in the OMC-2 and -3 region and detected an extended filamentary structure with at least 11 embedded condensations in OMC-2 and 10 in OMC-3. Six have been observed previously at 1300 mu m, and two were also detected by IRAS. We observed eight of the new sources at six wave bands from 350 to 2000 mu m and derived upper limits for their far-infrared (FIR) emission from the IRAS raw data. The millimeter/submillimeter emission originates from cold dust (T-d similar to 20 K), and the individual components have gas masses of 5 M. < M(gas) < 36 M.. The ratio L(bol)/L(smm) is below 70 for six sources associated with OMC-3, indicating that they are class 0-type objects. Condensations in the OMC-2 region have L(bol)/L(smm) less than or equal to 360, suggesting an evolutionary effect from north to south. We report the discovery of a highly collimated bipolar CO outflow, most likely driven by the source OMC-3 MMS 8. The flow is over 5' (0.7 pc) long and less than 1' (0.15 pc) wide and is oriented nearly east-west. Less prominent outflows are associated with OMC-2 FIR 2/3 and OMC-3 MMS 6. The 1300 mu m continuum emission is confined to a ridge less than 1' wide while the emission in J = 2-1 (CO)-C-13, (CO)-O-18, and CS is between 5' and 10' wide. The continuum emission is displaced toward the eastern side of the molecular ridge that contains it. Most 1300 mu m sources lie in or close to line emission peaks. However, not all line emission peaks contain prominent 1300 mu m continuum sources. The curved filamentary structure of the large-scale dust and molecular emission is likely the result of compression by the superbubble centered similar to 25-70 pc further north, plus the impact of energy from the younger Ic subgroup of the Orion OB association, which lies 10-50 pc in front of our mapped region, and by the very recent expansion of the NGC 1977 and M42H II regions. C1 EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. ROYAL OBSERV,EDINBURGH EH9 3HJ,MIDLOTHIAN,SCOTLAND. UNIV COLORADO,CTR ASTROPHYS & SPACE ASTRON,BOULDER,CO 80309. UNIV COLORADO,DEPT ASTROPHYS PLANETARY & ATMOSPHER SCI,BOULDER,CO 80309. INST RADIOASTRON MILIMETRICA,E-18012 GRANADA,SPAIN. RP Chini, R, MAX PLANCK INST RADIOASTRON,HUGEL 69,D-53121 BONN,GERMANY. NR 22 TC 56 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 10 PY 1997 VL 474 IS 2 PN Part 2 BP L135 EP & PG 10 SC Astronomy & Astrophysics GA WC500 UT ISI:A1997WC50000015 ER PT J AU Zingales, B Rondinelli, E Degrave, W daSilveira, JF Levin, M LePaslier, D Modabber, F Dobrokhotov, B Swindle, J Kelly, JM Aslund, L Hoheisel, JD Ruiz, AM Cazzulo, JJ Pettersson, U Frasch, AC TI The Trypanosoma cruzi genome initiative SO PARASITOLOGY TODAY LA English DT Review ID DNA; CONSTRUCTION; FRAGMENTS; SEQUENCE; LIBRARY; VECTOR AB An initiative was launched in 1994 by the Special Prone for Research and Training in Tropical Diseases (TDX) of the WHO to analyse the genomes of the parasites Filaria, Schistosoma, Leishmania, Trypanosoma brucei and Trypanosoma cruzi. Five networks were established through wide publicity, holding meetings of key laboratories and developing proposals which were then reviewed by the Steering Committee of Strategic Research for financial support. The aim of the Programme was to use the platform of these networks to: (1) train scientists From tropical disease-endemic countries; (2) transfer technology and share material and expertise, thereby reducing costs anti increasing efficiency; and (3) provide an information system that is accessible globally as soon as the results become available. The initial target suits to produce a low-resolution genome map for each of the parasites, but it soon became evident that by using rapidly developing technologies, it might be feasible to complete DNA-sequence analysis for some of the parasites in the next decade, as discussed here by Alberto Carlos Frasch and colleagues, with particular focus on the T, cruzi genome initiative. C1 UNIV AUTONOMA MADRID,MADRID,SPAIN. FDN JEAN DAUSSET,CEPH,PARIS,FRANCE. INST PASTEUR,UNITE PARASITOL EXPT,F-75015 PARIS,FRANCE. UNIFESP,ESCOLA PAULISTA MED,SAO PAULO,BRAZIL. FIOCRUZ MS,INST OSWALDO CRUZ,DEPT BIOQUIM & BIOL MOL,BR-21045900 RIO JANEIRO,BRAZIL. FIOCRUZ MS,BELO HORIZONT,MG,BRAZIL. INST TROP MED,SAO PAULO,BRAZIL. UNIV FED MINAS GERAIS,DEPT BIOQUIM & IMUNOL,BELO HORIZONT,MG,BRAZIL. INST INVEST GENET & BIOL MOL,BUENOS AIRES,DF,ARGENTINA. INST PARASITOL & BIOMED,GRANADA,SPAIN. FED UNIV RIO DE JANEIRO,INST BIOFIS CARLOS CHAGAS FILHO,RIO JANEIRO,BRAZIL. CENT UNIV VENEZUELA,CARACAS,VENEZUELA. UNIV SIMON BOLIVAR,CARACAS,VENEZUELA. UNIV SAO PAULO,INST QUIM,SAO PAULO,BRAZIL. INST NACL CHAGAS DR MARIO FATALA CHABEN,BUENOS AIRES,DF,ARGENTINA. UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,CONICET,INST INVEST BIOQUIM LUIS F LELOIR,BUENOS AIRES,DF,ARGENTINA. UNIV NACL GEN SAN MARTIN,INST INVEST BIOTECNOL,VILLA BALLESTER,ARGENTINA. UNIV LONDON LONDON SCH HYG & TROP MED,DEPT MED PARASITOL,LONDON WC1E 7HT,ENGLAND. UNIV TENNESSEE,CTR HLTH SCI,DEPT MICROBIOL & IMMUNOL,MEMPHIS,TN 38163. DEUTSCH KREBSFORSCHUNGSZENTRUM,D-6900 HEIDELBERG,GERMANY. UPPSALA UNIV,CTR BIOMED,DEPT MED GENET,UPPSALA,SWEDEN. NR 21 TC 43 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0169-4758 J9 PARASITOL TODAY JI Parasitol. Today PD JAN PY 1997 VL 13 IS 1 BP 16 EP 22 PG 7 SC Parasitology GA WE711 UT ISI:A1997WE71100007 ER PT J AU Anglada, G Sepulveda, I Gomez, JF TI Ammonia observations towards molecular and optical out flows SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Review DE ISM, jets and outflows; ISM, molecules; masers; stars, formation ID HERBIG-HARO OBJECTS; YOUNG STELLAR OBJECTS; DARK CLOUD COMPLEX; LOW-MASS STARS; SUBMILLIMETER-WAVELENGTH OBSERVATIONS; FORMING DENSE CORES; COLD IRAS SOURCES; BIPOLAR OUTFLOW; H2O MASERS; PEDESTAL FEATURES AB We observed the (J, K) = (1, 1) and (J, K) = (2, 2) inversion transitions of the NH3 molecule towards several regions with molecular or optical outflows: RNO 43, HH 83, KH 84, HH 86/87/88, L1641-N, L100, L483, L673, IRAS 20188+3928, L1228, L1048, HHL 73, L1251 (IRAS 22343 + 7501 and IRAS 22376+7455) and L1262, using the 37 m radio telescope of the Haystack Observatory. Additionally, we searched for the 6(16) - 5(23) H2O maser line towards nine regions, detecting a weak H2O maser near IRAS 20188+3928. We detected and mapped NH3 emission in 14 of the 15 regions observed, and we estimated physical parameters for the high density gas. We systematically found that the position of the best candidate for the outflow excitation in each region is very close to an NH3 emission peak. From a statistical study of the data presented in this paper, together with previously published data, we conclude that the NH3 line emission is more intense towards molecular outflow sources than towards sources with only optical outflows. Therefore, molecular outflows appear to be associated with larger amounts of high density gas. This result suggests a possible evolutive scheme in which young objects associated with molecular outflows lose progressively their neighboring high-density gas, weakening both the NH3 emission and the molecular outflow in the process, and making optical jets more easily detectable as the total amount of gas decreases. C1 NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. INTA,LAB ASTROFIS ESPACIAL & FIS FUNDAMENTAL,E-28080 MADRID,SPAIN. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP Anglada, G, UNIV BARCELONA,DEPT ASTRON & METEOROL,AV DIAGONAL 647,E-08028 BARCELONA,SPAIN. NR 145 TC 26 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD FEB PY 1997 VL 121 IS 2 BP 255 EP 274 PG 20 SC Astronomy & Astrophysics GA WF656 UT ISI:A1997WF65600005 ER PT J AU Martin, F Puertas, C Thomas, MC Maranon, C Patarroyo, ME Martin, J Alonso, C Lopez, MC TI Identification of a Trypanosoma cruzi antigenic epitope implicated in the infectivity of fibroblast LLC-MK2 cells SO PARASITOLOGY RESEARCH LA English DT Article ID SURFACE-ANTIGEN; CHAGAS-DISEASE; METACYCLIC TRYPOMASTIGOTES; RECOMBINANT ANTIGENS; DIAGNOSIS; PROTEIN; POLYPEPTIDES; SPECIFICITY; EXPRESSION; INVASION AB In the present paper we describe the identification of an antigenic epitope that appears to be associated with the surface membrane of the Trypanosoma cruzi parasite, probably implicated in infectivity. Anti-TcMe antibodies inhibited the infectivity of fibroblast LLC-MK2 cells by 34% relative to a preimmune serum. The epitope was specifically recognized by 55% of the sera from 80 chagasic patients. The anti-TcMe antibody immunoprecipitated proteins of about 60 and 40 kDa from epimastigote and cell-culture trypomastigote forms, respectively. It is likely that the 60- and 40-kDa proteins are processed from higher-molecular-weight precursors, since the antibody immunoprecipitated protein fractions in the range of 115-150 kDa from in vitro translation products of poly A(+) RNA. C1 CSIC,INST PARASITOL & BIOMED,DEPT BIOL MOL,E-18001 GRANADA,SPAIN. INST IMMUNOL,BOGOTA,COLOMBIA. UNIV AUTONOMA MADRID,CSIC,CTR BIOL MOL,E-28049 MADRID,SPAIN. NR 33 TC 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0044-3255 J9 PARASITOL RES JI Parasitol. Res. PD MAR PY 1997 VL 83 IS 3 BP 226 EP 232 PG 7 SC Parasitology GA WN931 UT ISI:A1997WN93100004 ER PT J AU Romero, E Barifouse, M Rasero, FS Pena, A delaColina, C Dios, G TI Fate of methabenzthiazuron in calcareous soils from southeastern Spain SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article AB Adsorption, incubation, and soil column experiments with methabenzthiazuron [1-(1,3-benzothiazol-2-yl-)-1,3-dimethylurea] (MET) were carried out on soils from the surrounding fertile plain of Granada (southeast Spain). The isotherms of MBT adsorption followed the Freundlich model. Due to the similar physico-chemical and mineralogical properties of the soils from this area, the K-f values were only correlated with soil clay content, smectite content, and soil surface area. Methabenzthiazuron degradation did not occur in the soils, under our experimental conditions, for incubation periods of up to 42 d. Methabenzthiazuron was not detected in the eluates from the clay and silt loam soil columns; it was retained in the first 3-cm layer and the retardation factor values, R, were 24 and 14, respectively. A computation model simulating a uniform flow of water and instantaneous adsorption-desorption equilibrium is suitable for the description of MBT in the G-8 soil but showed an overestimation in the G-11 soil column. C1 INST BIOL,BR-01402023 SAO PAULO,BRAZIL. RP Romero, E, CSIC,ESTAC EXPT ZAIDIN,PROF ALBAREDA 1,POB 419,E-18008 GRANADA,SPAIN. NR 22 TC 9 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD MAR-APR PY 1997 VL 26 IS 2 BP 466 EP 471 PG 6 SC Environmental Sciences GA WP039 UT ISI:A1997WP03900017 ER PT J AU McAllister, CB GarciaGarrido, JM GarciaRomera, I Godeas, A Ocampo, JA TI Interaction between Alternaria alternata or Fusarium equiseti and Glomus mosseae and its effects on plant growth SO BIOLOGY AND FERTILITY OF SOILS LA English DT Article DE Alternaria alternata; arbuscular mycorrhizas; Fusarium equiseti; Glomus mosseae; Lactuca sativa; lettuce; maize; saprophytic fungi; Zea mays ID NON-HOST PLANTS; MYCORRHIZAL INFECTION; RHIZOSPHERE AB The effect of inoculation with the saprophytic fungi Alternaria alternata or Fusarium equiseti on maize (Zea mays) and lettuce (Lactuca sativa) with or without arbuscular mycorrhizal (AM) colonization by Glomus mosseae was studied in a greenhouse trial. Plant dry weights of non-AM-inoculated maize and lettuce were unaffected by the presence of A. alternata and F. equiseti. In contrast, A. alternata and E. equiseti decreased plant dry weights and mycorrhization when inoculated to the rhizosphere before C. mosseae. The saprophytic fungi inoculated 2 weeks after G. mosseae did not affect the percentage of root length colonized by the AM endophyte, but did affect its metabolic activity assessed as succinate dehydrogenase activity. Although F. equiseti inoculated at the same time as G. mosseae did not affect mycorrhization of maize roots, its effect on AM colonization of lettuce roots was similar to that with A. alternata. In the rhizosphere of both plants, the population of saprophytic fungi decreased significantly, but was not affected by the presence of G. mosseae. Our results suggest that there may have been a direct effect of the saprophytic fungi on the mycorrhizal fungi in the extramatrical phase of the latter, and when the AM fungus was established in the root the AM fungus was less affected by the saprophytic fungi. C1 CSIC,DEPT MICROBIOL,ESTAC EXPT ZAIDIN,E-18008 GRANADA,SPAIN. UNIV BUENOS AIRES,DEPT CIENCIAS BIOL,RA-1428 BUENOS AIRES,DF,ARGENTINA. NR 20 TC 13 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-2762 J9 BIOL FERT SOILS JI Biol. Fertil. Soils PD MAR PY 1997 VL 24 IS 3 BP 301 EP 305 PG 5 SC Soil Science GA WT827 UT ISI:A1997WT82700010 ER PT J AU Allegretti, LI Passera, CB Robles, AB TI Short- and long-term effects of shrub management on vegetation in the Monte, Argentina SO JOURNAL OF ARID ENVIRONMENTS LA English DT Article DE Larrea spp.; range management; vegetation cover; vegetation diversity; carrying capacity ID TAILED DEER BROWSE; SOUTH TEXAS; DIVERSITY AB A comparison was made of plant cover, carrying capacity and diversity in areas of Monte vegetation at the Biosphere Reserve of Nacunan, Mendoza, Argentina, in 1982, 1984 and 1995. Treatments applied in 1981 were: control (untreated plots), selective hand-cutting, roller-chopping, and root-plowing. By 1995, woody cover was lower in root-plowed plots (27%) than in the others treatments (41-51%), and herbaceous cover was similar in treated (28-39%) and untreated areas (26%). Carrying capacity of treated areas (6-8 ha per Large Stock Unit (LSU)) was higher than in the control areas (12 ha LSU-1). Woody species diversity, quantified by the Shannon index, for both control and treated areas was similar in the study period (0.62), except in root-plowed sites in 1982 (0.0) and 1995 (1.3). Herbaceous species diversity was similar on treated (0.81) and untreated sites (1.2) in 1995. We could recommend less drastic treatments to improve carrying capacity. (C) 1997 Academic Press Limited. C1 CSIC,ESTAC EXPT ZAIDIN,E-18008 GRANADA,SPAIN. RP Allegretti, LI, CONSEJO NACL INVEST CIENT & TECN,INST ARGENTINO INVEST ZONAS ARIDAS,POB 507,RA-5500 MENDOZA,ARGENTINA. NR 29 TC 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0140-1963 J9 J ARID ENVIRON JI J. Arid. Environ. PD APR PY 1997 VL 35 IS 4 BP 685 EP 693 PG 9 SC Ecology; Environmental Sciences GA WU822 UT ISI:A1997WU82200009 ER PT J AU Steffen, W Gomez, JL Williams, RJR Raga, AC Pedlar, A TI Jet cocoons and the formation of narrow-line clouds in Seyfert galaxies SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE methods, numerical; galaxies, active; galaxies, individual, Mrk 1066; galaxies, jets; galaxies, kinematics and dynamics; galaxies, Seyfert ID EXTRAGALACTIC RADIO-SOURCES; RELATIVISTIC JETS; SYNCHROTRON EMISSION; ACTIVE GALAXIES; REGION; NGC-5929; EVOLUTION; NGC-1068; NUCLEUS; SHOCKS AB We present non-adiabatic hydrodynamic simulations of a supersonic light jet propagating into a fully ionized medium of uniform density on a scale representative of the narrow-line region (NLR) in Seyfert galaxies with associated radio jets. In this regime the cooling distance of the swept-up gas in the bowshock of the jet is of the same order as the transverse extent of the jet bowshock, as opposed to the more extreme regimes found for more powerful adiabatic large-scale jets or the slow galactic jets which have previously been simulated. We calculate the emissivity for the Ha line and for radio synchrotron emission. We find that the structure of the line-emitting cold envelope of the jet cocoon is strongly dependent on the nonstationary dynamics of the jet head as it propagates through the ambient medium. We observe the formation of cloud-like high density regions which we associate with NLR clouds and filaments. We find that some of these clouds might be partially neutral and represent sites of jet-induced star formation. The calculated Ha flux and the spectral line width are consistent with NLR observations. The simulation of the radio-optical emission with radiative cooling confirms the basic result of the geometric bowshock model developed by Taylor et al., i.e. that the start of noticeable optical line emission can be significantly offset from the hotspot of the radio emission. However, the time-dependent nature of the jet dynamics implies significant differences from Taylor et al.'s geometric bowshock model. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV LEEDS,DEPT PHYS & ASTRON,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. UNIV MANCHESTER,NUFFIELD RADIO ASTRON LABS,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND. RP Steffen, W, UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS & ASTRON,OXFORD RD,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 46 TC 19 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0NE SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD APR 21 PY 1997 VL 286 IS 4 BP 1032 EP & PG 10 SC Astronomy & Astrophysics GA WX968 UT ISI:A1997WX96800023 ER PT J AU Wild, W Eckart, A Wiklind, T TI Molecular excitation in Centaurus A: the (CO)-C-13 J=1-0 map and CO line ratios SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE galaxies: individual: NGC 5128; galaxies: nuclei; galaxies: ISM; radio lines: galaxies ID ELLIPTIC GALAXIES; NUCLEAR REGION; DUST LANE; EMISSION; GAS; ABSORPTION; CLOUDS; ABUNDANCES; EVOLUTION; DISK AB We present a fully sampled map of the (CO)-C-13 J=1-0 emission in the dust lane of Centaurus A as well as (CO)-C-13 2-1 and for the first time (CO)-O-18 1-0 spectra at selected positions. The morphology of the (CO)-C-13 map is similar to the (CO)-C-12 1-0 and 2-1 maps. Maps of the (CO)-C-12 2-1/1-0 and (CO)-C-12/(CO)-C-13 1-0 ratios show small variations of the ratios throughout the disk with a rise of the (CO)-C-12 2-1/1-0 ratio towards the southeast. The values found are within the range as found in other galaxies. Radiative transfer calculations indicate a kinetic temperature of 10-15 K and H-2 densities on the order of 3 x 10(4) cm(-3). In the southeastern part of the dust lane, the gas appears to be warmer (20-30 K) which may be due to a greater star formation activity. The total molecular mass is about 1.2 x 10(8) M.. The observed (CO)-C-12 2-1 intensity is consistent with the molecular gas being distributed in a thin, warped disk as modelled by Quillen et al. (1992). Comparison of the measurements with the kinematic model shows good agreement. C1 EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. MAX PLANCK INST EXTRATERR PHYS,D-85740 GARCHING,GERMANY. ONSALA SPACE OBSERV,S-43900 ONSALA,SWEDEN. RP Wild, W, IRAM,AVDA DIVINA PASTORA 7,E-18012 GRANADA,SPAIN. NR 32 TC 13 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 1997 VL 322 IS 2 BP 419 EP 426 PG 8 SC Astronomy & Astrophysics GA XE946 UT ISI:A1997XE94600011 ER PT J AU Miranda, LF Vazquez, R Torrelles, JM Eiroa, C Lopez, JA TI The structure of the compact planetary nebulae Cn 3-1 and M 3-27 and their extended haloes SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE ISM, kinematics and dynamics; planetary nebulae, individual, Cn 3-1; planetary nebulae, individual, M 3-27; radio continuum, ISM ID SPECTROSCOPY; DISTANCES; CATALOG AB We present long-slit optical spectroscopy and VLA-B radio continuum (lambda = 3.6 cm) observations of the compact planetary nebulae Cn 3-1 and M 3-27, The data allow us to distinguish different regions in both objects, to study their kinematical and emission properties, and to deduce different physical parameters in both nebulae, The radio and optical data show that the ionized shell of Cn 3-1 is an ellipsoid containing a bright, ring-like equatorial zone (size similar or equal to 2.6 arcsec, expansion velocity similar or equal to 14 km s(-1)). Two bright, point-symmetric arcs have been detected in the core of Cn 3-1, extending from the equator towards the polar regions of the ellipsoid. The arcs seem to be filamentary structures located on the ellipsoid, The origin of the arcs could be related to some sort of collimated bipolar ejections along a rotating axis, Relatively high mean [N II]/H alpha similar or equal to 0.83 and [S II]/H alpha similar or equal to 0.056 line intensity ratios are found in Cn 3-1, Maximum values of [S II]/H alpha of similar or equal to 0.083 are found in the arcs. The estimated kinematical age and ionized mass of Cn 3-1 are similar or equal to 1300 yr and similar or equal to 4 x 10(-2) M., respectively. M 3-27 is unresolved at 3.6 cm (size less than or equal to 0.6 arcsec), The detected [N II] and [S II] emission lines arise in a compact (size less than or equal to 1.4 arcsec), probably non-spherical region, which is identified with the ionized shell of M 3-27, The Ha emission from M 3-27 is dominated by strong stellar emission and exhibits a type III P Cygni profile with very extended wings (similar or equal to 3000 km s(-1)). A kinematical age of less than or equal to 530 yr and an ionized mass of similar or equal to 3 x 10(-4) M. are estimated for M 3-27, Extended haloes (size similar or equal to 36 arcsec in Cn 3-1, similar or equal to 24 arcsec in M 3-27) have been spectroscopically detected in both objects through their [N II] and/or H alpha emissions, An analysis of the kinematical and emission properties of the haloes strongly suggests that they are reflection nebulosities and contain large amounts of neutral material, and that the distribution of neutral material in them is largely isotropic. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV AUTONOMA MADRID,FAC CIENCIAS,DEPT FIS TEOR CXI,E-28049 MADRID,SPAIN. UNAM,INST ASTRON,ENSENADA 22830,BAJA CALIFORNIA,MEXICO. RP Miranda, LF, UNIV COMPLUTENSE MADRID,FAC CIENCIAS FIS,DEPT ASTROFIS,E-28040 MADRID,SPAIN. NR 32 TC 9 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0NE SN 0035-8711 J9 MON NOTIC ROY ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD JUL 1 PY 1997 VL 288 IS 3 BP 777 EP 786 PG 10 SC Astronomy & Astrophysics GA XJ687 UT ISI:A1997XJ68700025 ER PT J AU Rodriguez, E GonzalezBedolla, SF Rolland, A Costa, V deCoca, PL TI AN Lyn: An unusual medium amplitude delta Sct star SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE stars: variables: delta Scu; stars: individual: AN Lyn; stars: oscillations; techniques: photometric ID SCUTI STARS; PULSATING STARS; STROMGREN PHOTOMETRY; UVBY PHOTOMETRY AB Simultaneous uvby beta photometric observations of the medium amplitude delta Set star AN Lyn have been collected and new times of light maxima have been obtained. The Fourier transform and classical O-C methods are used to analyse the pulsation of this star. The light curves are peculiar in the sense that the descending branches are steeper than the ascending ones. Amplitude variations are shown to be present from season to season. The analysis of the phase shifts between observed light and colour variations suggests that this star is a radial pulsator. In addition, intrinsic b-y, m(1) and c(1) values are also derived and the physical parameters are determined indicating that this variable is a nearly cold and evolved delta Set star showing solar metal abundances and pulsating in the second overtone. C1 UNAM,INST ASTRON,MEXICO CITY 4510,DF,MEXICO. RP Rodriguez, E, CSIC,INST ASTROFIS ANDALUCIA,APARTADO 3004,E-18080 GRANADA,SPAIN. NR 33 TC 27 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 1997 VL 324 IS 3 BP 959 EP 964 PG 6 SC Astronomy & Astrophysics GA XT422 UT ISI:A1997XT42200025 ER PT J AU Gomez, J RodriguezCalvo, MS Albarran, C Amorim, A Andradas, J Cabrero, C Calvet, R Corach, D Crespillo, M Doutremepuich, C Garcia, O Geada, H Gene, M Jimenez, S Lorente, JA MarquesSantos, SM MartinezJarreta, B dePancorbo, MM Montes, F delaCuesta, JMR Sanz, P TerraPinheiro, MF Vide, MC Carracedo, A TI A review of the collaborative exercises on DNA typing of the Spanish and Portuguese ISFH working group SO INTERNATIONAL JOURNAL OF LEGAL MEDICINE LA English DT Article DE DNA polymorphisms; standardization; collaborative exercise; forensics ID EDNAP AB Since 1992 the Spanish and Portuguese Working Group (GEP) of the International Society for Forensic Haemogenetics (ISFH) has been organizing collaborative exercises on DNA profiling with the aim of making progress on standardization and discussing technical and statistical problems in DNA analysis. A total of four exercises (GEP-92 to GEP-95) have been carried out until now. A consequence of these exercises was the creation of a quality control programme in Spain and Portugal in 1995 which was carried out simultaneously with the GEP-95 exercise. The number of participating laboratories increased from 10 in the first exercise (GEP-92) to 19 in the last exercise (GEP-95). Despite this increasing number of participating laboratories, results remained satisfactory. In the last exercises, all the laboratories used PCR-based DNA polymorphisms with an increasing number of markers obtaining good results. SLPs were used by only 30% of laboratories in the last two exercises but the results indicated a good level of expertise in most of these laboratories. The reasons for these successful results are the common use of the EDNAP protocol for SLP analysis and commercially available kits or common sequenced allelic ladders for PCR-based DNA polymorphisms. C1 INST MED LEGAL,E-15705 SANTIAGO COMPOSTE,SPAIN. INST NACL TOXICOL,MADRID,SPAIN. IPATIMUP,OPORTO,PORTUGAL. COMISARIA GEN POLICIA CIENT,LAB ADN,MADRID,SPAIN. DPTO BIOL MOL,MADRID,SPAIN. FAC MED,SANTANDER,SPAIN. FAC FARM,SERV HUELLAS DIGITAL GENET,BUENOS AIRES,DF,ARGENTINA. INST NACL TOXICOL,BARCELONA,SPAIN. FAC PHARM,HEMATOL LAB,BORDEAUX,FRANCE. AREA LAB ERTZAINTZA,BILBAO,SPAIN. INST MED LEGAL,LISBON,PORTUGAL. CATEDRA MED LEGAL,BARCELONA,SPAIN. CATEDRA MED LEGAL,ALICANTE,SPAIN. CATEDRA MED LEGAL,GRANADA,SPAIN. LAB POLICIA CIENT,LISBON,PORTUGAL. CATEDRA MED LEGAL,ZARAGOZA,SPAIN. DPTO BIOL CELULAR & CIENCIAS MORFOL,LEIOA,PAIS VASCO,SPAIN. DIRECC GEN GUARDIA CIVIL,DPTO ANAL,MADRID,SPAIN. UNIV COMPLUTENSE MADRID,DPTO MED LEGAL & TOXICOL,MADRID,SPAIN. INST NACL TOXICOL,SEVILLE,SPAIN. INST MED LEGAL,OPORTO,PORTUGAL. INST MED LEGAL,COIMBRA,PORTUGAL. NR 13 TC 6 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0937-9827 J9 INT J LEGAL MED JI Int. J. Legal Med. PD SEP PY 1997 VL 110 IS 5 BP 273 EP 277 PG 5 SC Medicine, Legal GA XT496 UT ISI:A1997XT49600008 ER PT J AU Chini, R Reipurth, B Sievers, A WardThompson, D Haslam, CGT Kreysa, E Lemke, R TI Cold dust around Herbig-Haro energy sources: morphology and new protostellar candidates SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE interstellar medium: dust; stars: circumstellar matter; formation of ID PROPER MOTIONS; SUBMILLIMETER; OBJECTS; REGION; MILLIMETER; PHOTOMETRY; DISCOVERY; NGC-1333; EMISSION; COMPLEX AB We present 1300 mu m maps of regions centered on the energy sources of 20 HH objects in order to study the distribution of circumstellar matter around these young stellar objects. The data show that the emission generally originates from a rather compact region which is embedded in a more diffuse environment. The relative contribution of the compact component to the total emission varies from 15 to 100%. About half of the compact components appear spherically symmetric while the other half displays an elongated structure. There is, however, no correlation between the optical jet axis and the flattened dust structures, indicating that collimation occurs on smaller scales. Close to the energy source of HH 114 we discovered a so far unknown mm-source with L-bol/L-smm < 100 suggesting that it is still in its early protostellar evolutionary stage. In three other regions we detected similar unknown mm-sources without IRAS counterparts, indicating that they are also likely new protostellar candidates. C1 EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. IRAM,E-18012 GRANADA,SPAIN. ROYAL OBSERV,EDINBURGH EH9 3HJ,MIDLOTHIAN,SCOTLAND. MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. ONSALA SPACE OBSERV,S-43992 ONSALA,SWEDEN. RP Chini, R, RUHR UNIV BOCHUM,ASTRON INST,UNIV STR 150-NA 7,D-44780 BOCHUM,GERMANY. NR 50 TC 39 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD SEP PY 1997 VL 325 IS 2 BP 542 EP 550 PG 9 SC Astronomy & Astrophysics GA XX190 UT ISI:A1997XX19000017 ER PT J AU Steffen, W Pedlar, A Gomez, JL Raga, AC TI Jets and narrow line cloud formation in Seyfert galaxies SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID REGION AB In this paper we present simulations of an extragalactic jet interacting with a clumpy and filamentary narrow line region (NLR) similar to the one observed in NGC 1068. We study the kinematic disturbance produced by the interaction. H alpha recombination emissivity maps and the spectral distribution of the emission are calculated. We find that ablation flows from high density clouds in the turbulent cocoon can produce fast, high emissivity flows, resulting in line widths of the order of 1000 km s(-1) comparable to those observed in NGC 1068 and other Seyfert galaxies with radio ejecta. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP Steffen, W, UNIV MANCHESTER,DEPT PHYS & ASTRON,OXFORD RD,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 8 TC 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PY 1997 VL 248 IS 1-2 BP 135 EP 140 PG 6 SC Astronomy & Astrophysics GA YB896 UT ISI:A1997YB89600017 ER PT J AU AmoraLazcano, E Azcon, R TI Response of sulphur cycling microorganisms to arbuscular mycorrhizal fungi in the rhizosphere of maize SO APPLIED SOIL ECOLOGY LA English DT Article DE fungi; maize; arbuscular mycorrhizas; Glomales ID ROOTS; INFECTION; BACTERIA AB Fluctuations in the number of anaerobic sulphur mineralizers, autotrophic sulphur oxidizers and sulphate-reducing microorganisms in pot cultures of arbuscular mycorrhizal and non-mycorrhizal plants were examined at 0, 15, 30, 45 and 60 days after planting using the most probable number enumeration method. Two arbuscular mycorrhizal (AM) fungi belonging to different Glomus species were assayed. Populations of S-cycling microorganisms varied along the growth period for both AM fungi colonized and uncolonized plants, with significant quantitative and qualitative changes in the mycorrhizal compared with the non-mycorrhizal root zone, The occurrence of autotrophic sulphur oxidizers in pot cultures colonized with G. fasciculatum was significantly higher than in non-mycorrhizal ones throughout the plant growth period. The population size of this group was similar in non-mycorrhizal and G. mosseae colonized soil, The population of anaerobic sulphur mineralizing microorganisms was significantly decreased by mycorrhizal colonization. In contrast, pot cultures colonized by G. mosseae or G. fasciculatum had a higher quantity of sulphate-reducing bacteria than the control. The fact that the autotrophic S oxidizers and sulphate-reducing root-associated microorganisms were selectively stimulated by each one of the AM fungi assayed is a noticeable aspect. The maximum activity of the microbial processes regarding specific groups was at 15 days for the mineralizing, 45 days for the oxidizing and 0 days for the reducing microorganisms. In the case of autotrophic S oxidizers, the maximum population was achieved by 30 days in G. fasciculatum colonized treatment. From the data on occurrence of physiological grouping of sulphur-cycling microorganisms, we can deduce that a different ecological situation existed in the rhizosphere developed by non-mycorrhizal plants compared with those colonized by each one of the mycorrhizal endophytes. (C) 1997 Elsevier Science B.V. C1 SUELO & SISTEMAS SIMBIOTICOS,DEPT MICROBIOL,ESTAC EXPT ZAIDIN,GRANADA 18008,SPAIN. ESCUELA NACL CIENCIAS BIOL,DEPT MICROBIOL,MEXICO CITY 11340,DF,MEXICO. NR 23 TC 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0929-1393 J9 APPL SOIL ECOL JI Appl. Soil Ecol. PD NOV PY 1997 VL 6 IS 3 BP 217 EP 222 PG 6 SC Soil Science GA YE142 UT ISI:A1997YE14200002 ER PT J AU Vaz, LPR Andersen, J Clausen, JV Helt, BE Garcia, JM Gimenez, A Alencar, SHP TI Four-colour photometry of eclipsing binaries .38. Light curves of the triple system V906 Scorpii SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE stars, binaries, eclipsing; stars, individual, V906 Sco AB Complete uvby light curves of the detached triple-lined late B-type eclipsing binary V906 Scorpii, secured from 1987 to 1991, are presented. A detailed photometric analysis based on these observations and on new spectroscopic material yields accurate masses and radii (errors less than or similar to 2%) for the components, confirms that the system is a member of NGC 6475 (Messier 7), and is published separately (Alencar et al. 1997). C1 NIELS BOHR INST ASTRON PHYS & GEOPHYS,DK-2100 COPENHAGEN,DENMARK. ASTRON OBSERV,DK-2100 COPENHAGEN,DENMARK. UPM,DEPT FIS,EUIT IND,E-28012 MADRID,SPAIN. INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. INTA,LAB ASTROFIS ESPACIAL & FIS FUNDAMENTAL,MADRID 28080,SPAIN. RP Vaz, LPR, UNIV FED MINAS GERAIS,ICEX,DEPT FIS,CP 702,BR-30161970 BELO HORIZONT,MG,BRAZIL. NR 6 TC 1 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0365-0138 J9 ASTRON ASTROPHYS SUPPL SERIES JI Astron. Astrophys. Suppl. Ser. PD NOV PY 1997 VL 125 IS 3 BP 471 EP 473 PG 3 SC Astronomy & Astrophysics GA YE500 UT ISI:A1997YE50000008 ER PT J AU Girart, JM Estalella, R Anglada, G Torrelles, JM Ho, PTP Rodriguez, LF TI The ammonia core in L723: Hot spots at the center of the quadrupolar molecular outflow SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, individual, L723; ISM, jets and outflows; ISM, molecules; masers; radio lines, ISM; stars, formation ID STAR-FORMATION; CLOUD CORES; DARK CLOUDS; REGIONS; COLLAPSE; DISK; GAS AB We present the results of VLA NH3 and H2O observations, as well as Haystack (CO)-C-13, (CO)-O-18, and H2O observations toward the center of the peculiar quadrupolar molecular outflow in L723. In NH3 we detected a high-density structure, similar to 17 (similar to 0.15 pc) long, elongated in roughly the east-west direction, with the radio continuum source VLA 2 located near its center. We find evidence in the ammonia maps for heating and line broadening toward VLA 2, confirming that this source is driving the large lobe pair of the quadrupolar molecular outflow. Additionally, H2O maser emission is detected toward this radio continuum source. A second, very compact ammonia ''hot spot'' is observed 10'' west of VLA 2. This ''hot spot'' may be heated by a deeply embedded (still undetected) young stellar object that could be the driving source of the more compact pair of molecular outflow lobes. No ammonia emission is detected at the position of the source VLA 1, which is probably a line-of-sight source. C1 UNIV BARCELONA,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. UNAM,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. RP Girart, JM, HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138. NR 30 TC 17 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1997 VL 489 IS 2 PN Part 1 BP 734 EP & PG 12 SC Astronomy & Astrophysics GA YF300 UT ISI:A1997YF30000022 ER PT J AU Raga, AC Lopez, R Riera, A Estalella, R Anglada, G TI A long-slit, high resolution spectrum of the HH 30 jet SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE ISM-individual objects (HH 30); ISM-jets and outflows; stars-formation ID HL TAURI; OUTFLOWS AB The HH 30 jet has been observed quite extensively in the past. This paper is an addition to the HH 30 data set, presenting a new long-slit, high resolution spectrum (including the H alpha and red [N II] and [S II] lines), with a spatial coverage of similar to 10' From this spectrum, we carry out radial velocity determinations for the jet and its working surface, as well as for the counterjet. We find that the measured velocities appear to be consistent with an interpretation of HH 30 as a curved jet. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV BARCELONA,DEPT ASTRON METEOROL,E-08028 BARCELONA,SPAIN. UNIV POLITECN CATALUNYA,DEPT FIS & ENGN NUCL,E-0800 BARCELONA,SPAIN. RP Raga, AC, NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70264,MEXICO CITY 04510,DF,MEXICO. NR 10 TC 3 PU UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA PI MEXICO CITY PA APDO POSTAL 70-264, MEXICO CITY 04510, MEXICO SN 0185-1101 J9 REV MEX ASTRON ASTROFIS JI Rev. Mex. Astron. Astrofis. PD OCT PY 1997 VL 33 IS 2 BP 127 EP 130 PG 4 SC Astronomy & Astrophysics GA YF443 UT ISI:A1997YF44300007 ER PT J AU Ferrari, I Lorenzi, H Santos, MR Brandariz, S Requena, JM Schijman, A Vazquez, M daSilveira, JF BenDov, C Medrano, C Ghio, S Bergami, PL Cano, I Zingales, B Urmenyi, TP Rondinelli, E Gonzalez, A Cortes, A Lopez, MC Thomas, MC Alonso, C Ramirez, JL Chiurrillo, MA Aldao, RR Brandao, A Degrave, W Perrot, V Saumier, M Billaut, A Cohen, D LePaslier, D Levin, MJ TI Towards the physical map of the Trypanosoma cruzi nuclear genome: Construction of YAC and BAC libraries of the reference clone T-cruzi CL-Brener SO MEMORIAS DO INSTITUTO OSWALDO CRUZ LA English DT Article DE Trypanosoma cruzi; genome project; physical map; YAC library; BAC library; sequence tagged sites (STS); expressed sequence tags (EST) ID CHAGAS-DISEASE; PLASMODIUM-FALCIPARUM; DNA; CHROMOSOME; IDENTIFICATION; VARIABILITY; KARYOTYPE; FRAGMENTS; FAMILY; GENES AB Strategies to construct the physical map of the Trypanosoma cruzi nuclear genome have tn capitalize on three main advantages of the parasite genome, namely (a) its small size, (b) the fact that all chromosomes can be defined and many of them can be isolated by pulse field gel electrophoresis, and (c) the fact that simple Southern blots of electrophoretic karyotypes can be used to map sequence tagged sites and expressed sequence tags to chromosomal bands. A major drawback to cope with is the complexity of T. cruzi genetics, that hinders the construction of a comprehensive genetic map. As a first step towards physical mapping, we report the construction and partial characterization of a T. cruzi CL-Brener genomic library in yeast artificial chromosomes (YACs) that consists of 2,770 individual YACs with a mean insert size of 365 kb encompassing around 10 genomic equivalents. Two libraries ill bacterial artificial chromosomes (BACs) have been constructed BACI and BACII. Both libraries represent about three genome equivalents. A third BAC library (BAC III) is being constructed. YACs and BACs are invaluable tools for physical mapping. More generally, they have to be considered as a common resource for research in Chagas disease. C1 UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,CONICET,INGEBI,INST INVEST INGN GENET & BIOL MOL,RA-1428 BUENOS AIRES,DF,ARGENTINA. ESCOLA PAULISTA MED,SAO PAULO,SP,BRAZIL. CBM,MADRID,SPAIN. UNIV SAO PAULO,BR-05508 SAO PAULO,SP,BRAZIL. UNIV FED RIO DE JANEIRO,CCS,BR-21941 RIO JANEIRO,RJ,BRAZIL. IPB,GRANADA,SPAIN. CENT UNIV VENEZUELA,CARACAS,VENEZUELA. USB,CARACAS,VENEZUELA. INST OSWALDO CRUZ,RIO JANEIRO,RJ,BRAZIL. CTR ETUD POLYMORPHISME HUMAIN,F-75010 PARIS,FRANCE. NR 42 TC 14 PU FUNDACO OSWALDO CRUZ PI RIO DE JANEIRO, RJ PA AV BRASIL 4365, 21045-900 RIO DE JANEIRO, RJ, BRAZIL SN 0074-0276 J9 MEM INST OSWALDO CRUZ JI Mem. Inst. Oswaldo Cruz PD NOV-DEC PY 1997 VL 92 IS 6 BP 843 EP 852 PG 10 SC Parasitology; Tropical Medicine GA YF942 UT ISI:A1997YF94200021 ER PT J AU Brandao, A Urmenyi, R Rondinelli, E Gonzalez, A deMiranda, AB Degrave, W TI Identification of transcribed sequences (ESTs) in the Trypanosoma cruzi genome project SO MEMORIAS DO INSTITUTO OSWALDO CRUZ LA English DT Article DE expressed sequence tags sequencing; normalized cDNA library; Trypanosoma cruzi; clone CL Brener; Parasite Genome Projects ID TAGS AB Random single pass sequencing of cDNA fragments, also known as generation of Expressed Sequence Ta (ESTs), has been highly successful in the study of the gene content of higher organisms, and forms an integral part of most genome projects, with the objective to identify new genes and targets for disease control and prevention and to generate mapping probes. In the Trypanosoma cruzi genome project, EST sequencing has also been a starting point and here we report data on the first 797 sequences obtained, partly from a CL Brener epimastigote non-normalized library, partly on a normalized library. Only around 30% of the sequences obtained showed similarity with Genbank and dbEST databases,half of which with sequences already reported for T. cruzi. C1 INST OSWALDO CRUZ,DEPT BIOQUIM & BIOL MOL,BR-21045900 RIO JANEIRO,RJ,BRAZIL. UNIV FED RIO DE JANEIRO,ICB,INST BIOFIS CARLOS CHAGAS FILHO,BR-21941 RIO JANEIRO,RJ,BRAZIL. INST PARASITOL & BIOMED,GRANADA 18001,SPAIN. NR 15 TC 17 PU FUNDACO OSWALDO CRUZ PI RIO DE JANEIRO, RJ PA AV BRASIL 4365, 21045-900 RIO DE JANEIRO, RJ, BRAZIL SN 0074-0276 J9 MEM INST OSWALDO CRUZ JI Mem. Inst. Oswaldo Cruz PD NOV-DEC PY 1997 VL 92 IS 6 BP 863 EP 866 PG 4 SC Parasitology; Tropical Medicine GA YF942 UT ISI:A1997YF94200024 ER PT J AU Rodriguez, E GonzalezBedolla, SF Rolland, A Costa, V LopezGonzalez, MJ deCoca, PL TI Multiperiodicity in the atypical delta Sct star AN Lyn SO ASTRONOMY AND ASTROPHYSICS LA English DT Article DE stars: variables: delta Scu; stars: individual: AN Lyn; stars: oscillations; techniques: photometric ID STROMGREN PHOTOMETRY; PULSATING STARS; SCUTI STAR AB New uvby data collected of AN Lyn together with the reanalysis of old data establish that this star is a multiperiodic pulsator. Three independent frequencies (v(1) = 10.1756, v(2) = 18.1309 and v(3) = 9.5598 cd(-1)) and some interactions be tween them are found to be present in the light curve. Changes in amplitude with a large time scale are confirmed for the main frequency. Moreover, changes in amplitude are also present for the secondary frequencies, especially for v(3). After subtraction of the secondary frequencies from the light curves, the classical O-C method has been used to analyse the behaviour of the main period. A comparison is made between AN Lyn and the other two known delta Set stars with atypical light curves? i.e., V1719 Cyg and V798 Cyg. New uvby data have been also collected for V1719 Cyg and the O-C method has been used to analyse the behaviour of the main period. It is found that the main pulsation of this star can be well described by means of a linear ephemeris with a period of P = 0.(d)26729700 over the last eighteen years. Finally, analysis of the different data sets available in the literature do not reveal significative changes in the amplitude of the main frequency of V1719 Cyg. C1 UNAM,INST ASTRON,MEXICO CITY 4510,DF,MEXICO. RP Rodriguez, E, CSIC,INST ASTROFIS ANDALUCIA,APARTADO 3004,E-18080 GRANADA,SPAIN. NR 24 TC 14 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD DEC PY 1997 VL 328 IS 1 BP 235 EP 242 PG 8 SC Astronomy & Astrophysics GA YJ082 UT ISI:A1997YJ08200025 ER PT J AU TenorioTagle, G MunozTunon, C Perez, E Melnick, J TI Breakout: The origin of faint extended broad emission lines associated with giant extragalactic H II regions SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, kinematics and dynamics; H II regions ID X-RAY; NGC-2363; DYNAMICS; SUPERSTRUCTURES; GALAXIES; NGC-1569 AB The faint extended broad (greater than or equal to 1000 km s(-1)) optical emission lines associated with giant H II regions are shown here to be produced in a shell of ISM material smoothly accelerated soon after breakout. Two-dimensional calculations of remnants caused by a strong energy deposit in a low metal abundance ISM are here shown to undergo breakout once encountering a steep density gradient, leading to a fast-moving shell capable of producing the broad and faint emission lines. Energetic sources lead to fast, thick, and hot shells, and when evolving in a low-metallicity ISM, to quasi-adiabatic shells that strongly delay their fragmentation owing to Rayleigh-Taylor instabilities. At the same time, these are smoothly accelerated to reach large distances from the breakout point. The shell acceleration is promoted by the passage of several shocks with small relative speeds, caused by the continuous push exerted by the hot gas that steadily increases its speed to fill the deformed superbubble volume. C1 ROYAL GREENWICH OBSERV,CAMBRIDGE CB3 0EZ,ENGLAND. INST ASTROFIS CANARIAS,E-38200 LA LAGUNA,TENERIFE,SPAIN. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. INST ASTROPHYS ANDALUCIA,GRANADA,SPAIN. EUROPEAN SO OBSERV,SANTIAGO 19,CHILE. RP TenorioTagle, G, UNIV CAMBRIDGE,INST ASTRON,MADINGLEY RD,CAMBRIDGE CB3 0HA,ENGLAND. NR 20 TC 10 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1997 VL 490 IS 2 PN Part 2 BP L179 EP L182 PG 4 SC Astronomy & Astrophysics GA YJ477 UT ISI:A1997YJ47700014 ER EF