FN Thomson Reuters Web of Science™ VR 1.0 PT J AU HERSHKOVITZ, MA AF HERSHKOVITZ, MA TI LEAF MORPHOLOGY OF CALANDRINIA AND MONTIOPSIS (PORTULACACEAE) SO ANNALS OF THE MISSOURI BOTANICAL GARDEN LA English DT Article ID CISTANTHE SPACH PORTULACACEAE; CONSISTENCY INDEX; HOMOPLASY AB Calandrinia sect. Calandrinia, C. sect. Monocosmia, and some species of C sect. Acaules share identical leaf blade and petiolar morphology, fimbrial veins, predominantly brachytetracytic and staurocytic stomata surrounded by a cycle of subsidiary-like cells, and unicellular ribbed trichomes or papillar trichomes. Other species of C. sect. Acaules have irregularly brochidodromous venation without a fimbrial vein, predominantly brachyparacytic stomata, and/or no trichomes; venation and stomatal morphology in these species is similar to that found in Montiopsis. Leaves of Montiopsis lack petioles, have glandular or eglandular, uniseriate- and/or multiseriate-multicellular trichomes (although some examined specimens of M. subg. Dianthoideae appear to be glabrous), and generally have brachyparacytic stomata (although some examined specimens of subgenus Dianthoideae have a small proportion of brachytetracytic/staurocytic stomata with an outer cycle of cells). Leaves of M. subg. Montiopsis also have barbellate trichomes apparently composed of elongate hair cells, and have predominantly brachyparacytic or anomocytic stomata. Phylogenetic analysis of foliar characters of Portulacaceae: (1) supports a close relationship between C sects. Calandrinia and Monocosmia and species of C. sect. Acaules; (2) indicates that C. sect. Acaules may be paraphyletic with respect to the preceding taxa; (3) provides weak evidence contradicted by nonfoliar evidence that Claytonia and Montia may be nested within Calandrinia; (4) provides weak evidence linking Montiopsis with Calandrinia; and (5) indicates that foliar characters may not be more homoplasious than nonfoliar. Phylogenetically analyzed systematic accounts of foliar morphology, such as that presented here, may provide a basis for advancing theories on the relationship between leaf form, function, and ontogeny. RP HERSHKOVITZ, MA (reprint author), SMITHSONIAN INST,CTR MUSEUM SUPPORT,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560, USA. NR 41 TC 5 Z9 6 U1 1 U2 2 PU MISSOURI BOTANICAL GARDEN PI ST LOUIS PA 2345 TOWER GROVE AVENUE, ST LOUIS, MO 63110 SN 0026-6493 J9 ANN MO BOT GARD JI Ann. Mo. Bot. Gard. PY 1993 VL 80 IS 2 BP 366 EP 396 DI 10.2307/2399790 PG 31 WC Plant Sciences SC Plant Sciences GA LC647 UT WOS:A1993LC64700009 ER PT J AU CHASE, MW SOLTIS, DE OLMSTEAD, RG MORGAN, D LES, DH MISHLER, BD DUVALL, MR PRICE, RA HILLS, HG QIU, YL KRON, KA RETTIG, JH CONTI, E PALMER, JD MANHART, JR SYTSMA, KJ MICHAELS, HJ KRESS, WJ KAROL, KG CLARK, WD HEDREN, M GAUT, BS JANSEN, RK KIM, KJ WIMPEE, CF SMITH, JF FURNIER, GR STRAUSS, SH XIANG, QY PLUNKETT, GM SOLTIS, PS SWENSEN, SM WILLIAMS, SE GADEK, PA QUINN, CJ EGUIARTE, LE GOLENBERG, E LEARN, GH GRAHAM, SW BARRETT, SCH DAYANANDAN, S ALBERT, VA AF CHASE, MW SOLTIS, DE OLMSTEAD, RG MORGAN, D LES, DH MISHLER, BD DUVALL, MR PRICE, RA HILLS, HG QIU, YL KRON, KA RETTIG, JH CONTI, E PALMER, JD MANHART, JR SYTSMA, KJ MICHAELS, HJ KRESS, WJ KAROL, KG CLARK, WD HEDREN, M GAUT, BS JANSEN, RK KIM, KJ WIMPEE, CF SMITH, JF FURNIER, GR STRAUSS, SH XIANG, QY PLUNKETT, GM SOLTIS, PS SWENSEN, SM WILLIAMS, SE GADEK, PA QUINN, CJ EGUIARTE, LE GOLENBERG, E LEARN, GH GRAHAM, SW BARRETT, SCH DAYANANDAN, S ALBERT, VA TI PHYLOGENETICS OF SEED PLANTS - AN ANALYSIS OF NUCLEOTIDE-SEQUENCES FROM THE PLASTID GENE RBCL SO ANNALS OF THE MISSOURI BOTANICAL GARDEN LA English DT Article ID GLUCOSINOLATE-PRODUCING PLANTS; CHLOROPLAST-DNA; EVOLUTIONARY TREES; PATERNAL INHERITANCE; CLADISTIC-ANALYSIS; TAXONOMIC ANALYSIS; SPECIES TREES; ANGIOSPERMS; ORIGIN; RECONSTRUCTION AB We present the results of two exploratory parsimony analyses of DNA sequences from 475 and 499 species of seed plants, respectively, representing all major taxonomic groups. The data are exclusively from the chloroplast gene rbcL, which codes for the large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO or RuBPCase). We used two different state-transformation assumptions resulting in two sets of cladograms: (i) equal-weighting for the 499-taxon analysis; and (ii) a procedure that differentially weights transversions over transitions within characters and codon positions among characters for the 475-taxon analysis. The degree of congruence between these results and other molecular, as well as morphological, cladistic studies indicates that rbcL sequence variation contains historical evidence appropriate for phylogenetic analysis at this taxonomic level of sampling. Because the topologies presented are necessarily approximate and cannot be evaluated adequately for internal support, these results should be assessed from the perspective of their predictive value and used to direct future studies, both molecular and morphological. In both analyses, the three genera of Gnetales are placed together as the sister group of the flowering plants, and the anomalous aquatic Ceratophyllum (CeratophyUaceae) is sister to all other flowering plants. Several major lineages identified correspond well with at least some recent taxonomic schemes for angiosperms, particularly those of Dahlgren and Thorne. The basalmost clades within the angiosperms are orders of the apparently polyphyletic subclass Magnoliidae sensu Cronquist. The most conspicuous feature of the topology is that the major division is not monocot versus dicot, but rather one correlated with general pollen type: uniaperturate versus triaperturate. The Dilleniidae and Hamamelidae are the only subclasses that are grossly polyphyletic; an examination of the latter is presented as an example of the use of these broad analyses to focus more restricted studies. A broadly circumscribed Rosidae is paraphyletic to Asteridae and Dilleniidae. Subclass Caryophyllidae is monophyletic and derived from within Rosidae in the 475-taxon analysis but is sister to a group composed of broadly delineated Asteridae and Rosidae in the 499-taxon study. C1 UNIV N CAROLINA,DEPT BIOL,CHAPEL HILL,NC 27599. WASHINGTON STATE UNIV,DEPT BOT,PULLMAN,WA 99164. UNIV COLORADO,DEPT EPO BIOL,BOULDER,CO 80309. UNIV WISCONSIN,DEPT BIOL SCI,MILWAUKEE,WI 53201. DUKE UNIV,DEPT BOT,DURHAM,NC 27708. UNIV CALIF RIVERSIDE,DEPT BOT & PLANT SCI,RIVERSIDE,CA 92521. INDIANA UNIV,DEPT BIOL,BLOOMINGTON,IN 47405. TEXAS A&M UNIV SYST,DEPT BIOL,COLL STN,TX 77843. UNIV WISCONSIN,DEPT BOT,MADISON,WI 53706. BOWLING GREEN STATE UNIV,DEPT BIOL SCI,BOWLING GREEN,OH 43403. SMITHSONIAN INST,DEPT BOT,WASHINGTON,DC 20560. ARIZONA STATE UNIV,DEPT BOT,TEMPE,AZ 85287. UNIV UPPSALA,INST SYSTEMAT BOT,S-75121 UPPSALA,SWEDEN. UNIV TEXAS,DEPT BOT,AUSTIN,TX 78713. UNIV MINNESOTA,DEPT FOREST RESOURCES & PLANT BIOL,ST PAUL,MN 55108. OREGON STATE UNIV,DEPT FOREST SCI,FSL 020,CORVALLIS,OR 97331. UNIV TENNESSEE,DEPT BOT,KNOXVILLE,TN 37996. LEBANON VALLEY COLL,DEPT BIOL,ANNVILLE,PA 17003. UNIV NEW S WALES,SCH BIOL SCI,KENSINGTON,NSW 2033,AUSTRALIA. WAYNE STATE UNIV,DEPT BIOL SCI,DETROIT,MI 48202. BOSTON UNIV,DEPT BIOL,BOSTON,MA 02215. UNIV TORONTO,DEPT BOT,TORONTO M5S 3B2,ON,CANADA. RI Conti, Elena/G-3720-2010; Chase, Mark /A-6642-2011; Albert, Victor/A-1690-2010; Jansen, Robert/F-6272-2011; Barrett, Spencer/M-3751-2013; Graham, Sean/L-3944-2014; Palmer, Jeffrey/P-6747-2014; Soltis, Pamela/L-5184-2015 OI Graham, Sean/0000-0001-8209-5231; Palmer, Jeffrey/0000-0002-4626-2220; NR 97 TC 1481 Z9 1567 U1 10 U2 144 PU MISSOURI BOTANICAL GARDEN PI ST LOUIS PA 2345 TOWER GROVE AVENUE, ST LOUIS, MO 63110 SN 0026-6493 J9 ANN MO BOT GARD JI Ann. Mo. Bot. Gard. PY 1993 VL 80 IS 3 BP 528 EP 580 DI 10.2307/2399846 PG 53 WC Plant Sciences SC Plant Sciences GA LT678 UT WOS:A1993LT67800003 ER PT J AU DUVALL, MR CLEGG, MT CHASE, MW CLARK, WD KRESS, WJ HILLS, HG EGUIARTE, LE SMITH, JF GAUT, BS ZIMMER, EA LEARN, GH AF DUVALL, MR CLEGG, MT CHASE, MW CLARK, WD KRESS, WJ HILLS, HG EGUIARTE, LE SMITH, JF GAUT, BS ZIMMER, EA LEARN, GH TI PHYLOGENETIC HYPOTHESES FOR THE MONOCOTYLEDONS CONSTRUCTED FROM RBCL SEQUENCE DATA SO ANNALS OF THE MISSOURI BOTANICAL GARDEN LA English DT Article ID CHLOROPLAST DNA; ARACEAE AB DNA sequences for the plastid locus that encodes the large subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase (rbcL) were determined for 18 species of monocotyledons in 15 families. These data were analyzed together with sequences for 60 other monocot species in a total of 52 families by the maximum likelihood method producing one, presumably optimal, topology. An additional 26 species were added (104 total monocot species) and analyzed by the parsimony method with an outgroup of 18 dicot species producing 109 trees of 3,932 steps. The rbcL data show at least moderate support for seven lineages corresponding to the following orders, superorders, or combinations: Arecanae; Asparagales (excluding Hypoxidaceae) plus Iridaceae; Cyclanthanae plus Pandananae; Dioscoreales; Orchidales; Typhales; and Zingiberanae. Six clades corresponding to families or genera are well supported, including: Agavaceae, Asphodelaceae, Bromeliaceae, Hypoxidaceae, Poaceae, and Tradescantia. The two, earliest diverging multispecies clades in our rbcL phylogenies, Alismatanae and Aranae, are only weakly supported, and Bromelianae, Commelinanae, and Lilianae are paraphyletic. In all analyses Acorus calamus is phylogenetically isolated as the sister species to the remaining species of monocotyledons. C1 UNIV N CAROLINA,DEPT BIOL,CHAPEL HILL,NC 27599. NATL AUTONOMOUS UNIV MEXICO,CTR ECOL,MEXICO CITY 04510,DF,MEXICO. SMITHSONIAN INST,MOLEC SYSTEMAT LAB,SUITLAND,MD 20746. ARIZONA STATE UNIV,DEPT BOT,TEMPE,AZ 85287. NATL MUSEUM NAT HIST,DEPT BOT,NHB 166,WASHINGTON,DC 20560. RP DUVALL, MR (reprint author), UNIV CALIF RIVERSIDE,DEPT BOT & PLANT SCI,RIVERSIDE,CA 92521, USA. RI Chase, Mark /A-6642-2011; Zimmer, Elizabeth/G-3890-2011 NR 26 TC 188 Z9 202 U1 0 U2 10 PU MISSOURI BOTANICAL GARDEN PI ST LOUIS PA 2345 TOWER GROVE AVENUE, ST LOUIS, MO 63110 SN 0026-6493 J9 ANN MO BOT GARD JI Ann. Mo. Bot. Gard. PY 1993 VL 80 IS 3 BP 607 EP 619 DI 10.2307/2399849 PG 13 WC Plant Sciences SC Plant Sciences GA LT678 UT WOS:A1993LT67800006 ER PT J AU SMITH, JF KRESS, WJ ZIMMER, EA AF SMITH, JF KRESS, WJ ZIMMER, EA TI PHYLOGENETIC ANALYSIS OF THE ZINGIBERALES BASED ON RBCL SEQUENCES SO ANNALS OF THE MISSOURI BOTANICAL GARDEN LA English DT Article ID CLASSIFICATION AB Morphological data have been used previously to construct phylogenies of the eight families of the Zingiberales, one of the most widely accepted monophyletic groups of flowering plants. To provide additional support for phylogenetic relationships within the order, and placement of the order among monocots, we present a parsimony analysis of DNA sequences from the chloroplast-encoded gene, rbcL, for 21 species of Zingiberales and proposed relatives. Five analyses with equal, and differential weights were performed. All analyses resulted in the same most parsimonious tree for taxa within the Zingiberales and the immediate outgroup. The closest sister group to the Zingiberales based on these data is a clade containing Commelinaceae/Haemodoraceae/Pontederiaceae. The tree topology within the order based on rbcL sequence data is different from previous morphological analyses. The order can be divided into two sister groups, one containing the Costaceae and Marantaceae, and the other, the remaining six families. All recognized families are monophyletic with the exception of the Musaceae, which is paraphyletic with the Cannaceae. With trees one and two steps longer than the most parsimonious trees, phylogenetic resolution is rapidly lost, suggesting that the phylogenetic utility of rbcL sequence data for the Zingiberales is limited to interordinal and intrafamilial relationships. C1 SMITHSONIAN INST,DEPT BOT NHB 166,WASHINGTON,DC 20560. BOISE STATE UNIV,DEPT BIOL,BOISE,ID 83725. RP SMITH, JF (reprint author), SMITHSONIAN INST,CTR MUSEUM SUPPORT,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560, USA. NR 41 TC 35 Z9 36 U1 0 U2 6 PU MISSOURI BOTANICAL GARDEN PI ST LOUIS PA 2345 TOWER GROVE AVENUE, ST LOUIS, MO 63110 SN 0026-6493 J9 ANN MO BOT GARD JI Ann. Mo. Bot. Gard. PY 1993 VL 80 IS 3 BP 620 EP 630 DI 10.2307/2399850 PG 11 WC Plant Sciences SC Plant Sciences GA LT678 UT WOS:A1993LT67800007 ER PT J AU CHILDS, ST KILLICK, D AF CHILDS, ST KILLICK, D TI INDIGENOUS AFRICAN METALLURGY - NATURE AND CULTURE SO ANNUAL REVIEW OF ANTHROPOLOGY LA English DT Review DE TECHNOLOGY; SYMBOLISM; RITUAL; TRADE; ETHNOSCIENCE ID TECHNOLOGY; SYSTEMS; ANTHROPOLOGY; COPPER; BENIN; BANTU; OBA C1 UNIV ARIZONA,DEPT ANTHROPOL,TUCSON,AZ 85721. UNIV ARIZONA,DEPT MAT SCI & ENGN,TUCSON,AZ 85721. RP CHILDS, ST (reprint author), SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560, USA. NR 125 TC 48 Z9 50 U1 1 U2 3 PU ANNUAL REVIEWS INC PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 SN 0084-6570 J9 ANNU REV ANTHROPOL JI Annu. Rev. Anthropol. PY 1993 VL 22 BP 317 EP 337 PG 21 WC Anthropology SC Anthropology GA ME244 UT WOS:A1993ME24400014 ER PT J AU REID, MJ AF REID, MJ TI THE DISTANCE TO THE CENTER OF THE GALAXY SO ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS LA English DT Review DE MILKY WAY ID RR-LYRAE STARS; GLOBULAR-CLUSTER SYSTEM; LOCAL GROUP GALAXIES; H2O MASER SOURCES; PERIOD-LUMINOSITY RELATION; DWARF ELLIPTICAL GALAXIES; BAADE-WESSELINK METHOD; GALACTIC-CENTER; ABSOLUTE MAGNITUDES; PROPER MOTIONS RP REID, MJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 97 TC 585 Z9 589 U1 0 U2 5 PU ANNUAL REVIEWS INC PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 SN 0066-4146 J9 ANNU REV ASTRON ASTR JI Annu. Rev. Astron. Astrophys. PY 1993 VL 31 BP 345 EP 372 PG 28 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LX547 UT WOS:A1993LX54700010 ER PT J AU SIMKIN, T AF SIMKIN, T TI TERRESTRIAL VOLCANISM IN SPACE AND TIME SO ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES LA English DT Review DE ERUPTION; HAZARD; CLIMATE; TECTONICS ID SILICIC MAGMA CHAMBERS; STATISTICAL-ANALYSIS; ERUPTIVE ACTIVITY; CASCADE RANGE; MANTLE WEDGE; ICE-SHEET; ARC; SUBDUCTION; PATTERNS; SEGMENTATION RP SIMKIN, T (reprint author), SMITHSONIAN INST, NHB MAIL STOP 119, WASHINGTON, DC 20560 USA. RI Wright, Dawn/A-4518-2011 OI Wright, Dawn/0000-0002-2997-7611 NR 123 TC 70 Z9 71 U1 3 U2 10 PU ANNUAL REVIEWS PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 USA SN 0084-6597 J9 ANNU REV EARTH PL SC JI Annu. Rev. Earth Planet. Sci. PY 1993 VL 21 BP 427 EP 452 DI 10.1146/annurev.earth.21.1.427 PG 26 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA LE093 UT WOS:A1993LE09300015 ER PT J AU KNOWLTON, N AF KNOWLTON, N TI SIBLING SPECIES IN THE SEA SO ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS LA English DT Review DE MARINE; INVERTEBRATE; TAXONOMY; CRYPTIC SPECIES; SPECIATION ID BIOCHEMICAL GENETIC-VARIATION; CHTHAMALUS-MONTAGUI CRUSTACEA; CORAL POCILLOPORA-DAMICORNIS; COPEPOD GENUS PSEUDOCALANUS; WESTERN NORTH-ATLANTIC; REPRODUCTIVE ISOLATION; POPULATION-GENETICS; MITOCHONDRIAL-DNA; TAXONOMIC STATUS; MARINE-INVERTEBRATES AB Sibling species are common in all major marine groups and habitats. Their abundance reflects both inadequate study of morphological features of living organisms (''pseudo-sibling species'') and divergence in habitat, life history, and chemical recognition systems without parallel divergence in morphology. Many marine sibling species are quite distinct genetically. Others, however, exhibit slight genetic differences whose significance is only clear in sympatry and in combination with other subtle but concordant patterns of differentiation. A large number of abundant, well-studied, or economically important taxa have recently been shown to be complexes of sibling species. The broad habitat and geographic distributions characteristic of many marine species require reevaluation in this context. RP KNOWLTON, N (reprint author), SMITHSONIAN TROP RES INST, APARTADO 2072, BALBOA, PANAMA. NR 255 TC 787 Z9 816 U1 8 U2 85 PU ANNUAL REVIEWS PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 USA SN 0066-4162 J9 ANNU REV ECOL SYST JI Annu. Rev. Ecol. Syst. PY 1993 VL 24 BP 189 EP 216 DI 10.1146/annurev.ecolsys.24.1.189 PG 28 WC Ecology; Evolutionary Biology SC Environmental Sciences & Ecology; Evolutionary Biology GA MJ371 UT WOS:A1993MJ37100007 ER PT J AU VANSCHAIK, CP TERBORGH, JW WRIGHT, SJ AF VANSCHAIK, CP TERBORGH, JW WRIGHT, SJ TI THE PHENOLOGY OF TROPICAL FORESTS - ADAPTIVE SIGNIFICANCE AND CONSEQUENCES FOR PRIMARY CONSUMERS SO ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS LA English DT Review DE FRUITING; FLOWERING; LEAFING; PHENOLOGY; TROPICAL FORESTS ID SEMI-DECIDUOUS FOREST; LOWLAND RAIN-FOREST; COSTA-RICA; SEED DISPERSAL; DRY FORESTS; HUMMINGBIRD POLLINATION; DROUGHT ACCLIMATION; SEASONAL DROUGHT; EATING BIRDS; WATER-STRESS AB Most tropical woody plants produce new leaves and flowers in bursts rather than continuously, and most tropical forest communities display seasonal variation in the presence of new leaves, flowers, and fruits. This patterning suggests that phenological changes represent adaptations to either biotic or abiotic factors. Biotic factors may select for either a staggering or a clustering of the phenological activity of individual plant species. We review the evidence for several hypotheses. The idea that plant species can reduce predation by synchronizing their phenological activity has the best support. However, because biotic factors are often arbitrary with respect to the timing of these peaks, it is essential also to consider abiotic influences. A review of published studies demonstrates a major role for climate. Peaks in irradiance are accompanied by peaks in flushing and flowering except where water stress makes this impossible. Thus, in seasonally dry forests, many plants concentrate leafing and flowering around the start of the rainy season; they also tend to fruit at the same time, probably to minimize seedling mortality during the subsequent dry season. Phenological variation at the level of the forest community affects primary consumers who respond by dietary switching, seasonal breeding, changes in range use, or migration. During periods of scarcity, certain plant products, keystone resources, act as mainstays of the primary consumer community. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP VANSCHAIK, CP (reprint author), DUKE UNIV,CTR TROP CONSERVAT,DURHAM,NC 27705, USA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 171 TC 564 Z9 612 U1 17 U2 150 PU ANNUAL REVIEWS INC PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 SN 0066-4162 J9 ANNU REV ECOL SYST JI Annu. Rev. Ecol. Syst. PY 1993 VL 24 BP 353 EP 377 DI 10.1146/annurev.es.24.110193.002033 PG 25 WC Ecology; Evolutionary Biology SC Environmental Sciences & Ecology; Evolutionary Biology GA MJ371 UT WOS:A1993MJ37100013 ER PT J AU CRONIN, JW GIBBS, KG WEEKES, TC AF CRONIN, JW GIBBS, KG WEEKES, TC TI THE SEARCH FOR DISCRETE ASTROPHYSICAL SOURCES OF ENERGETIC GAMMA-RADIATION SO ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE LA English DT Review DE GAMMA-RAY ASTRONOMY; ATMOSPHERIC CERENKOV TECHNIQUE; EXTENSIVE AIR SHOWER ID AIR SHOWER ARRAY; NEUTRAL PARTICLES; CRAB-NEBULA; CYGNUS-X-3; TEV; RAYS; EMISSION; HERCULES-X-1 C1 HARVARD SMITHSONIAN CTR ASTROPHYS,WHIPPLE OBSERV,AMADO,AZ 85645. RP CRONIN, JW (reprint author), UNIV CHICAGO,ENRICO FERMI INST,5640 S ELLIS AVE,CHICAGO,IL 60637, USA. NR 87 TC 37 Z9 37 U1 0 U2 1 PU ANNUAL REVIEWS INC PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 SN 0163-8998 J9 ANNU REV NUCL PART S JI Annu. Rev. Nucl. Part. Sci. PY 1993 VL 43 BP 883 EP 925 PG 43 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA MM542 UT WOS:A1993MM54200019 ER PT J AU SOFFER, O VANDIVER, P OLIVA, M SEITL, L AF SOFFER, O VANDIVER, P OLIVA, M SEITL, L TI CASE OF THE EXPLODING FIGURINES SO ARCHAEOLOGY LA English DT Article C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. ANTHROPOS INST,MORAVIAN MUSEUM,BRNO,CZECHOSLOVAKIA. RP SOFFER, O (reprint author), UNIV ILLINOIS,CHAMPAIGN,IL 61820, USA. NR 0 TC 2 Z9 2 U1 0 U2 1 PU ARCHAEOLOGICAL INST PI NEW YORK PA 135 WILLIAM ST, NEW YORK, NY 10038-3805 SN 0003-8113 J9 ARCHAEOLOGY JI Archaeology PD JAN-FEB PY 1993 VL 46 IS 1 BP 36 EP 39 PG 4 WC Archaeology SC Archaeology GA KK736 UT WOS:A1993KK73600015 ER PT J AU LERNER, A AF LERNER, A TI A RECOLLECTION + ACCOUNT OF THE EXHIBITION 'MODERN SCULPTURE FROM THE JOSEPH H. HIRSHHORN COLLECTION' AT THE GUGGENHEIM-MUSEUM IN OCTOBER 1962 SO ARCHIVES OF AMERICAN ART JOURNAL LA English DT Article RP LERNER, A (reprint author), SMITHSONIAN INST,HIRSHHORN MUSEUM & SCULPTURE GARDEN,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ARCHIVES AMER ART PI WASHINGTON PA 8TH & F STREETS, WASHINGTON, DC 20560 SN 0003-9853 J9 ARCH AM ART J JI Arch. Am. Art J. PY 1993 VL 33 IS 4 BP 8 EP 10 PG 3 WC Art SC Art GA QM989 UT WOS:A1993QM98900002 ER PT J AU PANZER, M AF PANZER, M TI FRANK,ROBERT, MOVING OUT SO ARCHIVES OF AMERICAN ART JOURNAL LA English DT Art Exhibit Review RP PANZER, M (reprint author), SMITHSONIAN INST,NATL PORTRAIT GALLERY,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ARCHIVES AMER ART PI WASHINGTON PA 8TH & F STREETS, WASHINGTON, DC 20560 SN 0003-9853 J9 ARCH AM ART J JI Arch. Am. Art J. PY 1993 VL 33 IS 4 BP 22 EP 24 PG 3 WC Art SC Art GA QM989 UT WOS:A1993QM98900005 ER PT J AU WARD, DC AF WARD, DC TI AMERICAN ICONOLOGY - NEW APPROACHES TO 19TH-CENTURY ART AND LITERATURE - MILLER,DC SO ARCHIVES OF AMERICAN ART JOURNAL LA English DT Book Review RP WARD, DC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ARCHIVES AMER ART PI WASHINGTON PA 8TH & F STREETS, WASHINGTON, DC 20560 SN 0003-9853 J9 ARCH AM ART J JI Arch. Am. Art J. PY 1993 VL 33 IS 2 BP 26 EP 29 PG 4 WC Art SC Art GA PH145 UT WOS:A1993PH14500005 ER PT J AU SLUSSER, MS AF SLUSSER, MS TI THE 'SPICE GODDESSES', NOTES ON A TIBETAN PAINTING SO ARCHIVES OF ASIAN ART LA English DT Article RP SLUSSER, MS (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 43 TC 1 Z9 1 U1 0 U2 0 PU ASIA SOC PI NEW YORK PA 725 PARK AVE, NEW YORK, NY 10021 SN 0066-6637 J9 ARCH ASIAN ART JI Arch. Asian Art PY 1993 VL 46 BP 53 EP 62 PG 10 WC Art SC Art GA NG911 UT WOS:A1993NG91100003 ER PT J AU KRUPNIK, II AF KRUPNIK, II TI PREHISTORIC ESKIMO WHALING IN THE ARCTIC - SLAUGHTER OF CALVES OR FORTUITOUS ECOLOGY SO ARCTIC ANTHROPOLOGY LA English DT Article AB Two series of bowhead whale skulls were measured independently in 1977-1978 at historical Eskimo whaling sites in the Siberian and Canadian Arctic. Both show a predominance of juveniles and/or sucklings in the prehistoric harvest, which is supported by postcontact ethnographic data and local oral traditions. The same was true for the prehistoric and contact era indigenous gray whale hunting off the Chukchi Peninsula, Siberia. Whether such a selective extraction of calves was an ecologically disruptive activity or an efficient form of game management remains a matter of considerable controversy. This paper offers a new interpretation of this phenomenon as an outcome of a highly pragmatic strategy used by the indigenous arctic whalers in order to minimize the risk, time, and labor-investment of pursuing, killing, and processing their game. Some aspects of Eskimo whaling and bone utilization resemble the strategies used by Upper Paleolithic mammoth hunters of the Central Russian Plain. RP KRUPNIK, II (reprint author), SMITHSONIAN INST,CTR ARCT STUDIES,WASHINGTON,DC 20560, USA. NR 58 TC 10 Z9 11 U1 2 U2 3 PU UNIV WISCONSIN PRESS PI MADISON PA JOURNAL DIVISION, 114 N MURRAY ST, MADISON, WI 53715 SN 0066-6939 J9 ARCTIC ANTHROPOL JI Arct. Anthropol. PY 1993 VL 30 IS 1 BP 1 EP 12 PG 12 WC Anthropology SC Anthropology GA LQ532 UT WOS:A1993LQ53200001 ER PT B AU KURTZ, MJ KARAKASHIAN, T GRANT, CS EICHHORN, G MURRAY, SS WATSON, JM OSSORIO, PG STONER, JL AF KURTZ, MJ KARAKASHIAN, T GRANT, CS EICHHORN, G MURRAY, SS WATSON, JM OSSORIO, PG STONER, JL BE Hanisch, RJ Brissenden, RJV Barnes, J TI INTELLIGENT TEXT RETRIEVAL IN THE NASA ASTROPHYSICS DATA SYSTEM SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Eichhorn, Guenther/C-9480-2009; KURTZ, Michael /B-3890-2009 OI Eichhorn, Guenther/0000-0002-3032-1978; NR 0 TC 15 Z9 15 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 132 EP 136 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00024 ER PT B AU CONROY, MA DEPONTE, J MORAN, JF ORSZAK, JS ROBERTS, WP SCHMIDT, D AF CONROY, MA DEPONTE, J MORAN, JF ORSZAK, JS ROBERTS, WP SCHMIDT, D BE Hanisch, RJ Brissenden, RJV Barnes, J TI PROS - IRAF BASED SYSTEM FOR ANALYSIS OF X-RAY DATA SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 5 Z9 5 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 238 EP 242 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00041 ER PT B AU BRISSENDEN, RJV JONES, MT LJUNGBERG, M NGUYEN, DT ROLL, JB AF BRISSENDEN, RJV JONES, MT LJUNGBERG, M NGUYEN, DT ROLL, JB BE Hanisch, RJ Brissenden, RJV Barnes, J TI AXAF VETA X-RAY DATA-ACQUISITION AND CONTROL-SYSTEM SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 310 EP 314 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00053 ER PT B AU MANDEL, E BRISSENDEN, RJV FREEMAN, M NGUYEN, D ROLL, J AF MANDEL, E BRISSENDEN, RJV FREEMAN, M NGUYEN, D ROLL, J BE Hanisch, RJ Brissenden, RJV Barnes, J TI HAPPY FAMILIES OF AXAF SOFTWARE SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 347 EP 352 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00058 ER PT B AU DEPONTE, J PRIMINI, FA AF DEPONTE, J PRIMINI, FA BE Hanisch, RJ Brissenden, RJV Barnes, J TI DETECTION OF X-RAY SOURCES WITH PROS SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 425 EP 429 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00074 ER PT B AU MANDEL, E ROLL, J SCHMIDT, D VANHILST, M BURG, R AF MANDEL, E ROLL, J SCHMIDT, D VANHILST, M BURG, R BE Hanisch, RJ Brissenden, RJV Barnes, J TI SPATIAL REGION FILTERING IN IRAF PROS SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 430 EP 434 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00075 ER PT B AU MANNING, KR CONROY, MA DEPONTE, J MORAN, JF PRIMINI, FA SEWARD, FD ASCHENBACH, B AF MANNING, KR CONROY, MA DEPONTE, J MORAN, JF PRIMINI, FA SEWARD, FD ASCHENBACH, B BE Hanisch, RJ Brissenden, RJV Barnes, J TI VERIFICATION OF THE PROS TIMING ANALYSIS PACKAGE SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 484 EP 488 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00085 ER PT B AU MINK, DJ AF MINK, DJ BE Hanisch, RJ Brissenden, RJV Barnes, J TI SKYMAP - EXPLORING THE UNIVERSE IN SOFTWARE SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 499 EP 503 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00088 ER PT B AU BREEN, JO MELEEDY, DM AF BREEN, JO MELEEDY, DM BE Hanisch, RJ Brissenden, RJV Barnes, J TI SEEING THE FOREST FOR THE TREES - NETWORKED WORKSTATIONS AS A PARALLEL-PROCESSING COMPUTER SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS II SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd Conference on Astronomical Data Analysis Software and Systems - ADASS II CY NOV 02-04, 1992 CL BOSTON, MA SP NASA, NATL OPT ASTRON OBSERV, NATL SCI FDN, SMITHSONIAN ASTROPHYS OBSERV, SPACE TELESCOPE SCI INST C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-71-6 J9 ASTR SOC P PY 1993 VL 52 BP 566 EP 569 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Z UT WOS:A1993BZ94Z00102 ER PT J AU LEIBUNDGUT, B KIRSHNER, RP PHILLIPS, MM WELLS, LA SUNTZEFF, NB HAMUY, M SCHOMMER, RA WALKER, AR GONZALEZ, L UGARTE, P WILLIAMS, RE WILLIGER, G GOMEZ, M MARZKE, R SCHMIDT, BP WHITNEY, B CALDWELL, N PETERS, J CHAFFEE, FH FOLTZ, CB REHNER, D SICILIANO, L BARNES, TG CHENG, KP HINTZEN, PMN KIM, YC MAZA, J PARKER, JW PORTER, AC SCHMIDTKE, PC SONNEBORN, G AF LEIBUNDGUT, B KIRSHNER, RP PHILLIPS, MM WELLS, LA SUNTZEFF, NB HAMUY, M SCHOMMER, RA WALKER, AR GONZALEZ, L UGARTE, P WILLIAMS, RE WILLIGER, G GOMEZ, M MARZKE, R SCHMIDT, BP WHITNEY, B CALDWELL, N PETERS, J CHAFFEE, FH FOLTZ, CB REHNER, D SICILIANO, L BARNES, TG CHENG, KP HINTZEN, PMN KIM, YC MAZA, J PARKER, JW PORTER, AC SCHMIDTKE, PC SONNEBORN, G TI SN-1991BG - A TYPE-IA SUPERNOVA WITH A DIFFERENCE SO ASTRONOMICAL JOURNAL LA English DT Article ID EARLY-TYPE GALAXIES; ABSOLUTE-MAGNITUDE DISTRIBUTIONS; WHITE-DWARF MODELS; ELLIPTICAL GALAXIES; STANDARD STARS; VIRGO CLUSTER; DUST; SPECTROSCOPY; HOMOGENEITY; PHOTOMETRY AB We present 13 spectra and 31 photometric observations covering the first 150 days of SN 1991bg in NGC 4374 (M 84). Although SN 1991bg was a type Ia supernova displaying the characteristic Si II absorption at 6150 angstrom near maximum and the Fe emission lines at late phases, it varied from the well-defined norm for SNe Ia in several important respects. The peculiarities include faster declines in the B and V light curves after maximum, a distinct color evolution, a very red B-V color near maximum, relatively faint peak luminosity, a distinct spectral evolution, and a short peak phase. The narrow peak of the luminosity and the rapid declines of the light curves suggest a smaller mass in the ejecta and larger energy losses than for most SNe Ia. The unusually red color at maximum is not a result of normal extinction, since SN 1991bg was as blue as other SNe Ia at late times and no narrow interstellar lines are observed in the spectra. The faint absolute magnitude of SN 1991bg is established beyond doubt by comparison with SN 1957B, another type Ia supernova in the same galaxy, which was approximately 2.5 magnitudes brighter than SN 1991bg. The spectral evolution reveals minor differences near maximum compared to other well-observed SNe Ia, mainly in relative line strengths. At later phases several wavelength regions display discrepancies when compared to spectra of normal SNe Ia. Although other SNe Ia, such as SN 1986G and SN 1939B, have light curves with fast decline rates, SN 1991bg is unique, with deviations in both light curves and spectra. In particular SN 1991bg is the only SN Ia observed to date with a distinct spectrum at approximately 40 days past maximum. Although SN 1991bg is an extreme case, with unusual photometric and spectroscopic properties, we believe it can be understood in the context of exploding white dwarf models, and is properly grouped with type Ia. SN 1991bg demonstrates the need for detailed observations of SNe Ia as part of their use as standard candles for cosmology. While there is a well-defined prototype with homogeneous properties, unusual cases like SN 1991bg must be identified and separated to avoid misleading results. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138. CERRO TOLOLO INTERAMER OBSERV,LA SERENA,CHILE. FL WHIPPLE OBSERV,AMADO,AZ 85645. MULTIPLE MIRROR TELESCOPE OBSERV,TUCSON,AZ 85721. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. UNIV TEXAS,MCDONALD OBSERV,AUSTIN,TX 78712. NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. UNIV NEVADA,DEPT PHYS,LAS VEGAS,NV 89154. YALE UNIV,DEPT ASTRON,NEW HAVEN,CT 06511. UNIV CHILE,OBSERV ASTRON NACL,SANTIAGO,CHILE. UNIV COLORADO,CASA,APAS,BOULDER,CO 80309. ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287. RP LEIBUNDGUT, B (reprint author), NATL OPT ASTRON OBSERV,KITT PEAK NATL OBSERV,POB 26732,TUCSON,AZ 85726, USA. RI Hamuy, Mario/G-7541-2016 NR 91 TC 240 Z9 241 U1 1 U2 5 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 JAN PY 1993 VL 105 IS 1 BP 301 EP & DI 10.1086/116427 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KF509 UT WOS:A1993KF50900026 ER PT J AU GRINDLAY, JE AF GRINDLAY, JE TI IDENTIFICATION OF THE SIGMA SOURCE NEAR 3C 273 - A NEW CLASS OF AGN SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON RECENT ADVANCES IN HIGH ENERGY ASTRONOMY CY MAR 17-20, 1992 CL TOULOUSE, FRANCE SP CTR NATL ETUDES SPATIALES, CNRS, CONSEIL REG MIDI PYRENEES, CEA, UNIV PAUL SABATIER TOULOUSE, CTR ETUDE SPATIALE RAYONNEMENTS DE GAMMA-RAYS, OBSERVATIONS; X-RAYS, GALAXIES; QUASARS, INDIVIDUAL, 3C-273; QUASARS, INDIVIDUALS, 1E1227+0224; QUASARS, GENERAL ID QUASARS AB The hard X-ray source detected with SIGMA at an offset of approximately 15' from 3C 273 may be identified with an uncatalogued Einstein X-ray source detected in the deep Einstein HRI exposure of 3C 273 and in subsequent short IPC exposures. We have identified this source, within the SIGMA error circle, with a faint (mag 19-20) QSO at z = 0.57. Comparison of the SIGMA and Einstein fluxes with this optical object suggest it is highly self-absorbed, and possibly highly variable. The discovery of such a class of AGN would have important consequences for the cosmic X-ray background. RP GRINDLAY, JE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 7 TC 6 Z9 6 U1 0 U2 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 SUP JI Astron. Astrophys. Suppl. Ser. PD JAN PY 1993 VL 97 IS 1 BP 113 EP 115 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KJ736 UT WOS:A1993KJ73600029 ER PT J AU GRINDLAY, JE COVAULT, CE MANANDHAR, RP AF GRINDLAY, JE COVAULT, CE MANANDHAR, RP TI EXITE OBSERVATION OF THE GALACTIC-CENTER - A NEW TRANSIENT SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON RECENT ADVANCES IN HIGH ENERGY ASTRONOMY CY MAR 17-20, 1992 CL TOULOUSE, FRANCE SP CTR NATL ETUDES SPATIALES, CNRS, CONSEIL REG MIDI PYRENEES, CEA, UNIV PAUL SABATIER TOULOUSE, CTR ETUDE SPATIALE RAYONNEMENTS DE STARS, INDIVIDUAL, 1E1740.7-2942, EXS1737.9-2952; GAMMA-RAYS, OBSERVATIONS; GALAXY, CENTER; BLACK HOLE AB The balloon-borne Energetic X-ray Imaging Telescope Experiment (EXITE) observed the galactic center on May 9, 1989. Within the 3.4-degrees (FW H M) field of view, imaged with 22' resolution at 20-250 keV, two sources were detected: the 'Einstein source' (1E1740.7-2942) and a possible second source approximately 40' West (EXS1737.9-2952). This source was detected significantly at both 20-30 keV and 83-111 keV, suggesting a double-backscattered 511 keV line source at 102 keV and a soft excess, perhaps from a black hole candidate undergoing a transient outburst. RP GRINDLAY, JE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 17 TC 12 Z9 12 U1 0 U2 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 SUP JI Astron. Astrophys. Suppl. Ser. PD JAN PY 1993 VL 97 IS 1 BP 155 EP 158 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KJ736 UT WOS:A1993KJ73600039 ER PT J AU SHIGEYAMA, T KUMAGAI, S YAMAOKA, H NOMOTO, K THIELEMANN, FK AF SHIGEYAMA, T KUMAGAI, S YAMAOKA, H NOMOTO, K THIELEMANN, FK TI THEORETICAL PREDICTION OF GAMMA-RAYS FROM SN-1991T SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON RECENT ADVANCES IN HIGH ENERGY ASTRONOMY CY MAR 17-20, 1992 CL TOULOUSE, FRANCE SP CTR NATL ETUDES SPATIALES, CNRS, CONSEIL REG MIDI PYRENEES, CEA, UNIV PAUL SABATIER TOULOUSE, CTR ETUDE SPATIALE RAYONNEMENTS DE NUCLEOSYNTHESIS; SUPERNOVAE, INDIVIDUAL (SN-1991T); STARS, WHITE DWARFS; X-RAYS; GAMMA-RAYS AB We calculate the evolution of gamma-ray spectra from the recent unique type Ia supernova SN 1991T based on the late detonation models. If a similar supernova occurs at a distance less-than-or-equal-to 5 Mpc, gamma-ray lines from the decays of Ni-56 and Co-56 in the outermost layers can be observed with GRO significantly earlier than normal type Ia supernovae. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV TOKYO,BUNKYO KU,TOKYO 113,JAPAN. RP SHIGEYAMA, T (reprint author), MAX PLANCK INST ASTROPHYS,KARL SCHWARZSCHILD STR 1,W-8046 GARCHING,GERMANY. RI Nomoto, Ken'ichi/A-4393-2011; SHIGEYAMA, TOSHIKAZU/G-4894-2014 NR 6 TC 9 Z9 9 U1 0 U2 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 SUP JI Astron. Astrophys. Suppl. Ser. PD JAN PY 1993 VL 97 IS 1 BP 223 EP 224 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KJ736 UT WOS:A1993KJ73600055 ER PT J AU WOLFIRE, MG HOLLENBACH, D TIELENS, AGGM AF WOLFIRE, MG HOLLENBACH, D TIELENS, AGGM TI CO (J = 1-0) LINE EMISSION FROM GIANT MOLECULAR CLOUDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, CLOUDS; ISM, MOLECULES; LINE, FORMATION; MOLECULAR PROCESSES ID INTER-STELLAR CLOUDS; STEADY-STATE MODELS; WARM NEUTRAL HALOS; CARBON-MONOXIDE; PHOTODISSOCIATION REGIONS; ULTRAVIOLET-RADIATION; HYDROSTATIC MODELS; INFRARED-EMISSION; INTERSTELLAR CO; OUTER GALAXY AB We present numerical models of the (CO)-C-12 (J = 1-0) line emission from Giant Molecular Clouds (GMCs). The models calculate simultaneously the gas chemistry, thermal balance, and line transfer in a GMC of column density congruent-to 10(22) cm-2 (A(V) congruent-to 10) which is illuminated by an ultraviolet radiation field and subject to cosmic-ray heating and ionization. Line profiles are calculated for both microturbulent and macroturbulent cloud models. In the microturbulent case the line arises from gas with a supersonic velocity distribution with dispersion velocity on the order of the observed line width. In the macroturbulent case the line arises from a distribution of moving clumps, each with intrinsic line width which is on the order of the thermal line width and much smaller than the velocity dispersion of clumps. The typical clump-clump speed is of order of the observed line width. A theoretical plot of the CO luminosity versus cloud mass is constructed, and the variation in luminosity with incident radiation field and metallicity is investigated. Our main conclusions are the following: (1) The profile of the observed CO (J = 1-0) line cannot be interpreted as arising from a microturbulent gas velocity distribution. Microturbulent models produce emission with a wide range in profile shapes (i.e., self-absorbed profiles) and peak brightness temperatures in contrast to the observations. (2) Macroturbulent models can produce centrally peaked, smooth profiles, but only when many clumps are contained within the telescope beam. (3) Photoelectric heating dominates in the region where the CO (J = 1-0) line arises. Cosmic-ray heating alone is insufficient. In the absence of photoelectric heating, a cosmic-ray ionization rate of zeta = 2.4 x 10(-16) would be required to produce the observed CO (J = 1-0) line emission. This is approximately 15 times greater than the inferred rate from astrochemistry. (4) The integrated CO (J = 1-0) fine luminosity emitted from a GMC is only weakly dependent on the incident ultraviolet radiation field for fluxes up to approximately 10(3) times greater than the local Galactic field. At higher incident fluxes, GMCs with A(V) less than or similar to 10 are appreciably photodissociated resulting in a drop in CO luminosity. The critical field for dissociation is proportional to e1.6AV, and clouds with A(V) > 10 can remain molecular while illuminated by much higher fields. (5) If the hydrogen column density through a GMC is a constant (N congruent-to 10(22) cm-2), the CO luminosity is insensitive to small variations in metallicity Z up to a reduction in Z by a factor of 5, but thereafter decreases approximately linearly with Z. Alternatively, for a constant dust extinction of A(V) almost-equal-to 10 (and constant cloud mass), we find that the CO luminosity decreases by factors of 2.3 and 3.3 for reductions in Z by factors of 5 and 10, respectively. C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. RP WOLFIRE, MG (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MS 78,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 75 TC 80 Z9 80 U1 0 U2 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 JAN 1 PY 1993 VL 402 IS 1 BP 195 EP 215 DI 10.1086/172123 PN 1 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD944 UT WOS:A1993KD94400016 ER PT J AU KAROVSKA, M NISENSON, P BELETIC, J AF KAROVSKA, M NISENSON, P BELETIC, J TI SPECKLE OBSERVATIONS OF MIRA COMPANION SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, VISUAL; STARS, INDIVIDUAL (O CETI); TECHNIQUES, INTERFEROMETRIC ID WIND ACCRETION AB We present the first speckle interferometric observations of Mira's hot companion. The companion accretes mass from Mira's wind and provides an excellent opportunity for studying the accretion processes in detached binaries. The separation between the components of the system is crucial for accurate determination of the accretion rate onto the companion. Speckle measurements of the separation made at three epochs since 1983 with much higher precision than previous visual observations show that the companion's distance from Mira is substantially larger than expected. C1 GEORGIA TECH RES INST,ATLANTA,GA 30332. RP KAROVSKA, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 20 TC 20 Z9 20 U1 0 U2 0 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 1 PY 1993 VL 402 IS 1 BP 311 EP & DI 10.1086/172134 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD944 UT WOS:A1993KD94400027 ER PT J AU SCHMITT, JHMM ZINNECKER, H CRUDDACE, R HARNDEN, FR AF SCHMITT, JHMM ZINNECKER, H CRUDDACE, R HARNDEN, FR TI ROSAT DETECTIONS OF X-RAY-EMISSION FROM YOUNG B-TYPE STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS-CORONAE; X-RAYS-STARS AB We present first results of a series of pointings of the ROSAT HRI at visual binaries consisting of a B-star with a later-type companion. The binaries selected for this study are very likely physical pairs. Dating of the B-type stars with respect to the zero-age main sequence, as well as spectroscopic observations of the late-type stars, provides evidence for the extreme youth of these systems with ages typically near or below 10(8) yr. Surprisingly, the late-B component was in many cases detected as an X-ray source, in contrast to previous findings that X-ray emission among late-B field stars is rather uncommon. C1 UNIV WURZBURG,INST ASTRON & ASTROPHYS,W-8700 WURZBURG,GERMANY. USN,RES LAB,EO HULBERT CTR SPACE RES,WASHINGTON,DC 20375. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP SCHMITT, JHMM (reprint author), MAX PLANCK INST EXTRATERRESTR PHYS,W-8046 GARCHING,GERMANY. NR 20 TC 53 Z9 53 U1 0 U2 0 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 1 PY 1993 VL 402 IS 1 BP L13 EP L16 DI 10.1086/186688 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD947 UT WOS:A1993KD94700004 ER PT J AU SEUTIN, G BRAWN, J RICKLEFS, RE BERMINGHAM, E AF SEUTIN, G BRAWN, J RICKLEFS, RE BERMINGHAM, E TI GENETIC-DIVERGENCE AMONG POPULATIONS OF A TROPICAL PASSERINE, THE STREAKED SALTATOR (SALTATOR-ALBICOLLIS) SO AUK LA English DT Article ID MITOCHONDRIAL-DNA VARIATION; NUCLEOTIDE SUBSTITUTIONS; EVOLUTION; DIFFERENTIATION; NUMBER AB We analyzed mitochondrial-DNA (mtDNA) restriction-site variation in populations (subspecies) of the Streaked Saltator (Saltator albicollis) in Panama, Peru, and the Lesser Antilles. Genetic differentiation between populations (Panama vs. Peru, 0.035; Lesser Antilles vs. Panama/Peru, 0.063) greatly exceeded values reported for populations or subspecies within North American bird species (0.0028-0.0086), and was near the high end of the range reported for congeneric species of passerine birds (0.016-0.073). Nucleotide diversity within populations was similar to that reported for other species of passerines and did not differ markedly between mainland and island populations. Thus, founder effects and population bottlenecks associated with island colonization appear to have caused little, if any, loss of mtDNA nucleotide diversity. No significant mtDNA differentiation was observed between populations of named subspecies on mainland Panama (S. a. isthmicus) and the Pearl Islands (speratus), or between two subspecies in the Lesser Antilles (albicollis and guadelupensis). Saltator albicollis exhibits marked geographical genetic differentiation, as assayed by mtDNA polymorphism, but this bears little relationship to subspecies distinctions. Finally, the genetic data suggest that Antillean populations of Streaked Saltators should be distinguished at specific rank (S. albicollis), with continental forms referred to S. striatipectus. C1 UNIV PENN,DEPT BIOL,PHILADELPHIA,PA 19104. RP SEUTIN, G (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 46 TC 71 Z9 72 U1 1 U2 4 PU AMER ORNITHOLOGISTS UNION PI LAWRENCE PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 SN 0004-8038 J9 AUK JI AUK PD JAN PY 1993 VL 110 IS 1 BP 117 EP 126 PG 10 WC Ornithology SC Zoology GA KZ086 UT WOS:A1993KZ08600014 ER PT J AU YAVITT, JB WIEDER, RK WRIGHT, SJ AF YAVITT, JB WIEDER, RK WRIGHT, SJ TI SOIL NUTRIENT DYNAMICS IN RESPONSE TO IRRIGATION OF A PANAMANIAN TROPICAL MOIST FOREST SO BIOGEOCHEMISTRY LA English DT Article DE NITROGEN; PHOSPHORUS; SOIL FERTILITY; TROPICAL FOREST ID MICROBIAL BIOMASS NITROGEN; BARRO-COLORADO ISLAND; TERRA-FIRME FOREST; SEASONAL DIFFERENCES; BIOCIDAL TREATMENTS; COSTA-RICA; PHOSPHORUS; SULFUR; MINERALIZATION; AVAILABILITY AB We measured concentrations of soil nutrients (0-15 and 30-35 cm depths) before and after the dry season in control and dry-season irrigated plots of mature tropical moist forest on Barro Colorado Island (BCI) in central Panama to determine how soil moisture affects availability of plant nutrients. Dry-season irrigation (January through April in 1986, 1987, and 1988) enhanced gravimetric soil water contents to wet-season levels (ca. 400 g kg-1) but did not cause leaching beyond 0.8 m depth in the soil. Irrigation increased concentrations of exchangeable base cations (Ca2+, Mg2+, K+, Na+), but it had little effect on concentrations of inorganic N (NH4+, NO3- and S (SO42-). These BCI soils had particularly low concentrations of extractable P especially at the end of the dry season in April, and concentrations increased in response to irrigation and the onset of the rainy season. We also measured the response of soil processes (nitrification and S mineralization) to irrigation and found that they responded positively to increased soil moisture in laboratory incubations, but irrigation had little effect on rates in the field. Other processes (plant uptake, soil organic matter dynamics) must compensate in the field and keep soil nutrient concentrations at relatively low levels. C1 VILLANOVA UNIV,DEPT BIOL,VILLANOVA,PA 19085. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP YAVITT, JB (reprint author), CORNELL UNIV,DEPT NAT RESOURCES,FERNOW HALL,ITHACA,NY 14853, USA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 71 TC 28 Z9 30 U1 0 U2 9 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0168-2563 J9 BIOGEOCHEMISTRY JI Biogeochemistry PY 1993 VL 19 IS 1 BP 1 EP 25 PG 25 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA LC240 UT WOS:A1993LC24000001 ER PT B AU COLINVAUX, P AF COLINVAUX, P BE Goldblatt, P TI PLEISTOCENE BIOGEOGRAPHY AND DIVERSITY IN TROPICAL FORESTS OF SOUTH-AMERICA SO BIOLOGICAL RELATIONSHIPS BETWEEN AFRICA AND SOUTH AMERICA LA English DT Proceedings Paper CT 37th Annual Systematics Symposium: Biological Relationships Between Africa and South America CY OCT 04-06, 1990 CL MISSOURI BOTAN GARDEN, ST LOUIS, MO SP MISSOURI BOTAN GARDEN HO MISSOURI BOTAN GARDEN C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 0 TC 62 Z9 63 U1 1 U2 3 PU YALE UNIV PRESS PI NEW HAVEN PA 302 TEMPLE ST, NEW HAVEN, CT 06511 BN 0-300-05375-4 PY 1993 BP 473 EP 499 PG 27 WC Biology; Plant Sciences; Ecology; Geology; Zoology SC Life Sciences & Biomedicine - Other Topics; Plant Sciences; Environmental Sciences & Ecology; Geology; Zoology GA BB21J UT WOS:A1993BB21J00016 ER PT J AU DORR, LJ AF DORR, LJ TI LECTOTYPIFICATION OF CACAO-GUIANENSIS AUBLET (STERCULIACEAE) SO BRITTONIA LA English DT Article DE STERCULIACEAE; CACAO; THEOBROMA; LECTOTYPIFICATION AB Hitherto ''suppressed,'' Cacao guianensis, based on a mixture of elements that can be referred to three currently recognized species (i.e., Theobroma cacao, T. subincanum, and T. velutinum), is lectotypified by Aublet's illustrations of its flowers. This makes C. guianensis a taxonomic synonym of T. cacao and encourages nomenclatural stability by permitting the continued use of T. subincanum and T. velutinum. RP DORR, LJ (reprint author), SMITHSONIAN INST,DEPT BOT,NHB-166,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK BOTANICAL GARDEN PI BRONX PA PUBLICATIONS DEPT, BRONX, NY 10458 SN 0007-196X J9 BRITTONIA JI Brittonia PD JAN-MAR PY 1993 VL 45 IS 1 BP 32 EP 33 DI 10.2307/2806856 PG 2 WC Plant Sciences SC Plant Sciences GA KR692 UT WOS:A1993KR69200006 ER PT J AU MOOI, RD AF MOOI, RD TI PHYLOGENY OF THE PLESIOPIDAE (PISCES, PERCIFORMES) WITH EVIDENCE FOR THE INCLUSION OF THE ACANTHOCLINIDAE SO BULLETIN OF MARINE SCIENCE LA English DT Article ID PSEUDOCHROMIDAE; PERCOIDEI; SUBFAMILY; TELEOSTEI AB Cladistic methods are used to investigate phylogenetic relationships of the Indo-Pacific marine fish family Plesiopidae. Using multiple outgroups, osteological and myological characters indicate that plesiopids are monophyletic only with the inclusion of the Acanthoclinidae as the sister group to the genus Plesiops. A new classification lowers the Acanthoclinidae to subfamilial rank, and other monophyletic units are recognized at this same rank to produce the following phylogenetically sequenced classification (included genera in parentheses): Trachinopinae (Trachinops), Assessorinae (Assessor), Paraplesiopinae (Paraplesiops, Calloplesiops, Steeneichthys), Fraudellinae (Fraudella), Plesiopinae (Plesiops), Acanthoclininae (Acanthoclinus, Belonepterygion, Beliops, Acanthoplesiops). This phylogeny suggests that egg mass guarding is plesiomorphic for the family, and that oral incubation in Assessor is autapomorphic. A diagnosis for the newly defined family is provided. C1 SMITHSONIAN INST, DIV FISHES NHB WG-12, WASHINGTON, DC 20560 USA. NR 72 TC 19 Z9 21 U1 2 U2 4 PU ROSENSTIEL SCH MAR ATMOS SCI PI MIAMI PA 4600 RICKENBACKER CAUSEWAY, MIAMI, FL 33149 USA SN 0007-4977 EI 1553-6955 J9 B MAR SCI JI Bull. Mar. Sci. PD JAN PY 1993 VL 52 IS 1 BP 284 EP 326 PG 43 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA KX230 UT WOS:A1993KX23000011 ER PT J AU KRATZ, CA AF KRATZ, CA TI WEVE ALWAYS DONE IT LIKE THIS ... EXCEPT FOR A FEW DETAILS - TRADITION AND INNOVATION IN OKIEK CEREMONIES SO COMPARATIVE STUDIES IN SOCIETY AND HISTORY LA English DT Article ID LANGUAGE; AFRICA C1 SMITHSONIAN INST,WASHINGTON,DC 20560. RP KRATZ, CA (reprint author), UNIV NAIROBI,NAIROBI,KENYA. NR 88 TC 14 Z9 14 U1 1 U2 2 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0010-4175 J9 COMP STUD SOC HIST JI Comp. Stud. Soc. Hist. PD JAN PY 1993 VL 35 IS 1 BP 30 EP 65 PG 36 WC Anthropology; History; Sociology SC Anthropology; History; Sociology GA KT435 UT WOS:A1993KT43500002 ER PT B AU BROWN, CK DAY, MD CHALMERS, FG THURBER, FE AF BROWN, CK DAY, MD CHALMERS, FG THURBER, FE GP GETTY CTR EDUC ARTS TI QUESTIONS AND ANSWERS SO DISCIPLINE-BASED ART EDUCATION AND CULTURAL DIVERSITY, SEMINAR PROCEEDINGS LA English DT Proceedings Paper CT National Invitational Seminar on Discipline-based Art Education and Cultural Diversity CY AUG 06-09, 1992 CL AUSTIN, TX SP Getty Ctr Educ Arts C1 SMITHSONIAN INST,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU GETTY CENTER EDUCATION ARTS PI SANTA MONICA PA 401 WILSHIRE BLVD SUITE 950, SANTA MONICA, CA 90401-1455 BN 0-89236-279-0 PY 1993 BP 32 EP 42 PG 11 WC Art; Education & Educational Research SC Art; Education & Educational Research GA BD22R UT WOS:A1993BD22R00007 ER PT B AU YELAVICH, S AF YELAVICH, S BE Yelavich, S TI SETTING THE STAGE FOR THE ORD MILLENNIUM SO EDGE OF THE MILLENNIUM: AN INTERNATIONAL CRITIQUE OF ARCHITECTURE, URBAN PLANNING, PRODUCT AND COMMUNICATION DESIGN LA English DT Proceedings Paper CT International Conference on the Edge of the Millennium CY 1992 CL COOPER UNION ADV SCI & ART, NEW YORK, NY HO COOPER UNION ADV SCI & ART C1 SMITHSONIAN INST,COOPER HEWITT,NATL MUSEUM DESIGN,NEW YORK,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WHITNEY LIBRARY DESIGN PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 BN 0-8230-0254-3 PY 1993 BP 10 EP 14 PG 5 WC Architecture; Urban Studies SC Architecture; Urban Studies GA BA46F UT WOS:A1993BA46F00001 ER PT B AU YELAVICH, S AF YELAVICH, S BE Yelavich, S TI CITY - SPIRIT AND FORM SO EDGE OF THE MILLENNIUM: AN INTERNATIONAL CRITIQUE OF ARCHITECTURE, URBAN PLANNING, PRODUCT AND COMMUNICATION DESIGN LA English DT Proceedings Paper CT International Conference on the Edge of the Millennium CY 1992 CL COOPER UNION ADV SCI & ART, NEW YORK, NY HO COOPER UNION ADV SCI & ART C1 SMITHSONIAN INST,COOPER HEWITT,NATL MUSEUM DESIGN,NEW YORK,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WHITNEY LIBRARY DESIGN PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 BN 0-8230-0254-3 PY 1993 BP 42 EP 46 PG 5 WC Architecture; Urban Studies SC Architecture; Urban Studies GA BA46F UT WOS:A1993BA46F00004 ER PT B AU YELAVICH, S AF YELAVICH, S BE Yelavich, S TI PRODUCT AND THE NEW TECHNOLOGICAL JUGGERNAUT SO EDGE OF THE MILLENNIUM: AN INTERNATIONAL CRITIQUE OF ARCHITECTURE, URBAN PLANNING, PRODUCT AND COMMUNICATION DESIGN LA English DT Proceedings Paper CT International Conference on the Edge of the Millennium CY 1992 CL COOPER UNION ADV SCI & ART, NEW YORK, NY HO COOPER UNION ADV SCI & ART C1 SMITHSONIAN INST,COOPER HEWITT,NATL MUSEUM DESIGN,NEW YORK,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WHITNEY LIBRARY DESIGN PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 BN 0-8230-0254-3 PY 1993 BP 121 EP 124 PG 4 WC Architecture; Urban Studies SC Architecture; Urban Studies GA BA46F UT WOS:A1993BA46F00014 ER PT B AU YELAVICH, S AF YELAVICH, S BE Yelavich, S TI COMMUNICATION - NEW TRANSLATIONS SO EDGE OF THE MILLENNIUM: AN INTERNATIONAL CRITIQUE OF ARCHITECTURE, URBAN PLANNING, PRODUCT AND COMMUNICATION DESIGN LA English DT Proceedings Paper CT International Conference on the Edge of the Millennium CY 1992 CL COOPER UNION ADV SCI & ART, NEW YORK, NY HO COOPER UNION ADV SCI & ART C1 SMITHSONIAN INST,COOPER HEWITT,NATL MUSEUM DESIGN,NEW YORK,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WHITNEY LIBRARY DESIGN PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 BN 0-8230-0254-3 PY 1993 BP 190 EP 194 PG 5 WC Architecture; Urban Studies SC Architecture; Urban Studies GA BA46F UT WOS:A1993BA46F00023 ER PT B AU LUPTON, E MILLER, JA AF LUPTON, E MILLER, JA BE Yelavich, S TI CRITICAL WAY FINDING SO EDGE OF THE MILLENNIUM: AN INTERNATIONAL CRITIQUE OF ARCHITECTURE, URBAN PLANNING, PRODUCT AND COMMUNICATION DESIGN LA English DT Proceedings Paper CT International Conference on the Edge of the Millennium CY 1992 CL COOPER UNION ADV SCI & ART, NEW YORK, NY HO COOPER UNION ADV SCI & ART C1 SMITHSONIAN INST,COPPER HEWITT,NATL MUSEUM DESIGN,NEW YORK,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WHITNEY LIBRARY DESIGN PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 BN 0-8230-0254-3 PY 1993 BP 220 EP 232 PG 13 WC Architecture; Urban Studies SC Architecture; Urban Studies GA BA46F UT WOS:A1993BA46F00027 ER PT B AU MANANDHAR, RP LUM, KSK EIKENBERRY, SS KROCKENBERGER, M GRINDLAY, JE AF MANANDHAR, RP LUM, KSK EIKENBERRY, SS KROCKENBERGER, M GRINDLAY, JE BE Siegmund, OHW TI DEVELOPMENT OF EXITE2 - A LARGE-AREA IMAGING PHOSWICH DETECTOR TELESCOPE FOR HARD X-RAY ASTRONOMY SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY IV SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV CY JUL 11-12, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1255-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2006 BP 200 EP 210 DI 10.1117/12.162834 PG 11 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BZ57B UT WOS:A1993BZ57B00022 ER PT J AU LEIGH, EG WRIGHT, SJ HERRE, EA PUTZ, FE AF LEIGH, EG WRIGHT, SJ HERRE, EA PUTZ, FE TI THE DECLINE OF TREE DIVERSITY ON NEWLY ISOLATED TROPICAL ISLANDS - A TEST OF A NULL HYPOTHESIS AND SOME IMPLICATIONS SO EVOLUTIONARY ECOLOGY LA English DT Article DE DIVERSITY; HABITAT FRAGMENTATION; FORESTS; PLANT ANIMAL INTERACTIONS; RESERVE DESIGN; NULL MODELS AB Six islands, each less than a hectare in area, were isolated in about 1913 from the mainland of central Panama by the rising waters of Gatun Lake. By 1980, the diversity of trees on all but one of these islands was far lower than on mainland plots of comparable size. A restricted subset of tree species has spread on these islands, notably Protium panamense, Scheelea zonensis, Oenocarpus panamanus and Swartzia simplex. We constructed a null model to predict how chance would change tree diversity and the similarity of tree species compositions of different islands, assuming that each mature tree has equal chances of dying and/or reproducing, regardless of its species. This model cannot account for the diminished diversity of the changes in vegetation on these islands: some factors must be favoring a particular set of tree species. Two factors, exposure to wind and absence of mammals, seem needed to bring about the vegetation changes observed on these small islands. Their vegetation shows many signs of wind damage and of adaptation to resist wind, reflecting its exposure to dry season winds and storm winds sweeping across the lake from the west. Their most common tree species appear to have spread because mammals rarely visit these small and isolated islands. Seed of these common species are normally much eaten by mammals and do not need burial by mammals to escape insect attack. A thorough grasp of plant-animal interactions is needed to understand the events that have taken place on these islands. Identifying those 'keystone animals' essential for maintaining plant diversity is a necessary element of reserve design and forest management in the tropics. RP LEIGH, EG (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APARTADO 2072,APO AA,BALBOA,PANAMA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 0 TC 149 Z9 153 U1 0 U2 15 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0269-7653 J9 EVOL ECOL JI Evol. Ecol. PD JAN PY 1993 VL 7 IS 1 BP 76 EP 102 DI 10.1007/BF01237735 PG 27 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA KH132 UT WOS:A1993KH13200005 ER PT J AU AGORAMOORTHY, G RUDRAN, R AF AGORAMOORTHY, G RUDRAN, R TI MALE DISPERSAL AMONG FREE-RANGING RED HOWLER MONKEYS (ALOUATTA-SENICULUS) IN VENEZUELA SO FOLIA PRIMATOLOGICA LA English DT Note DE RED HOWLERS; ALOUATTA SENICULUS; MALE DISPERSAL; KIN RELATIONSHIP; INFANTICIDE AVOIDANCE; INCEST AVOIDANCE; MIGRATION; SEX RATIO ID INBREEDING AVOIDANCE C1 SMITHSONIAN INST,NATL ZOOL PK,CTR CONSERVAT & RES,FRONT ROYAL,VA. NR 22 TC 14 Z9 15 U1 0 U2 9 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 0015-5713 J9 FOLIA PRIMATOL JI Folia Primatol. PY 1993 VL 61 IS 2 BP 92 EP 96 DI 10.1159/000156734 PG 5 WC Zoology SC Zoology GA NG324 UT WOS:A1993NG32400003 PM 8188124 ER PT S AU FRANX, M AF FRANX, M BE Dejonghe, H Habing, HJ TI WHAT IS THE CONNECTION BETWEEN ELLIPTICALS AND BULGES SO GALACTIC BULGES SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 153rd Symposium of the International-Astronomical-Union: Galactic Bulges CY AUG 17-22, 1992 CL GHENT, BELGIUM SP INT ASTRON UNION DE ELLIPTIC GALAXIES; BULGES; DARK HALOS; FORMATION; STELLAR POPULATIONS ID EARLY-TYPE GALAXIES; DARK MATTER; ISOPHOTE SHAPES; ROTATION CURVES; SPIRAL GALAXIES; DISK GALAXIES; CLUSTERS; PHOTOMETRY; EVOLUTION; VIRGO AB The structure of bulges and ellipticals, and their relation to galaxy halos are reviewed. Since many ellipticals contain faint disks, the qualitative distinction between bulges and ellipticals is more accurately described as a quantitative variation in Bulge/Disk ratio. The exception may be the brightest ellipticals, which are usually Bright(est) Cluster Members, The available evidence suggests that the spheroid properties are determined by more than halo properties alone. This is dearest for systems with low B/D ratio, where bulge velocity dispersions are similar to disk velocity dispersions. Constraints on the stellar formation scenarios are discussed. RP FRANX, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 60 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2424-2 J9 IAU SYMP PY 1993 IS 153 BP 243 EP 260 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ76M UT WOS:A1993BZ76M00016 ER PT S AU RIX, HW FRANX, M FISHER, D ILLINGWORTH, G AF RIX, HW FRANX, M FISHER, D ILLINGWORTH, G BE Dejonghe, H Habing, HJ TI THE COUNTER-ROTATING TWIN DISKS IN NGC-4550 SO GALACTIC BULGES SE IAU SYMPOSIA LA English DT Article; Proceedings Paper CT 153rd Symposium of the International-Astronomical-Union: Galactic Bulges CY AUG 17-22, 1992 CL GHENT, BELGIUM SP INT ASTRON UNION DE GALAXIES, KINEMATICS; GALAXIES, LENTICULARS; GALAXIES, INDIVIDUAL, NGC 4550 ID NGC-4550 AB We discuss the striking kinematic properties of the SO galaxy NGC 4550. A detailed analysis of the Line-of-sight velocity distribution (LOSVD) along the major axis shows that this galaxy contains two cold, cospatial, counterrotating disks with indistinguishable scale lengths and luminosities. The two disks, twins save the signs of their spin, are also found to have exponential luminosity profiles. We discuss qualitatively how this system might have formed. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. RP RIX, HW (reprint author), INST ADV STUDY,PRINCETON,NJ 08540, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-2424-2 J9 IAU SYMP PY 1993 IS 153 BP 421 EP 422 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ76M UT WOS:A1993BZ76M00082 ER PT J AU GOLDWIRTH, DS PERRY, MJ PIRAN, T AF GOLDWIRTH, DS PERRY, MJ PIRAN, T TI THE BREAKDOWN OF QUANTUM-MECHANICS IN THE PRESENCE OF TIME MACHINES SO GENERAL RELATIVITY AND GRAVITATION LA English DT Article ID CURVES AB General Relativity allows for the existence of closed timelike curves. Various attempts have been made to exploit this possibility and build a ''time machine,'' that is a spacetime that has closed timelike lines inside some compact domain. We examine a simple model of a time machine, and construct the quantum-mechanical propagator for free particles in the vicinity of the causality violating domain. We discover that it is impossible for such propagators to be consistent with the law of conservation of probability. We speculate on the possible deeper consequences of our calculations. C1 UNIV CAMBRIDGE,DAMTP,CAMBRIDGE CB3 9EW,ENGLAND. MIT,DEPT MATH,CAMBRIDGE,MA 02139. HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. RP GOLDWIRTH, DS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 20 TC 3 Z9 3 U1 0 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0001-7701 J9 GEN RELAT GRAVIT JI Gen. Relativ. Gravit. PD JAN PY 1993 VL 25 IS 1 BP 7 EP 13 DI 10.1007/BF00756924 PG 7 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KQ441 UT WOS:A1993KQ44100002 ER PT B AU GRINDLAY, JE AF GRINDLAY, JE BE Smith, GH Brodie, JP TI X-RAYING STELLAR REMNANTS IN GLOBULAR-CLUSTERS SO GLOBULAR CLUSTER-GALAXY CONNECTION: GLOBULAR CLUSTERS WITHIN THE CONTEXT OF THEIR PARENT GALAXIES SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 11th Santa Cruz Summer Workshop in Astronomy and Astrophysics CY JUL 19-29, 1992 CL UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA SP UCO LICK OBSERV, UNIV CALIF SANTA CRUZ, BOARD STUDIES ASTRON & ASTROPHYS HO UNIV CALIF SANTA CRUZ C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 32 Z9 32 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-67-8 J9 ASTR SOC P PY 1993 VL 48 BP 156 EP 166 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94W UT WOS:A1993BZ94W00022 ER PT B AU HUCHRA, JP AF HUCHRA, JP BE Smith, GH Brodie, JP TI KINEMATICS OF THE M31 GLOBULAR-CLUSTER SYSTEM SO GLOBULAR CLUSTER-GALAXY CONNECTION: GLOBULAR CLUSTERS WITHIN THE CONTEXT OF THEIR PARENT GALAXIES SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 11th Santa Cruz Summer Workshop in Astronomy and Astrophysics CY JUL 19-29, 1992 CL UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA SP UCO LICK OBSERV, UNIV CALIF SANTA CRUZ, BOARD STUDIES ASTRON & ASTROPHYS HO UNIV CALIF SANTA CRUZ C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 17 Z9 17 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-67-8 J9 ASTR SOC P PY 1993 VL 48 BP 420 EP 431 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94W UT WOS:A1993BZ94W00061 ER PT B AU KORZENNIK, SG SABBEY, CN AF KORZENNIK, SG SABBEY, CN BE Brown, TM TI MEASUREMENT OF THE PHASE RELATION BETWEEN VELOCITY AND INTENSITY FLUCTUATIONS SO GONG 1992: SEISMIC INVESTIGATION OF THE SUN AND STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on GONG 1992: Seismic Investigation of the Sun and Stars CY AUG 11-14, 1993 CL BOULDER, CO SP GLOBAL OSCILLAT NETWORK GRP C1 SMITHSONIAN INST,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-61-9 J9 ASTR SOC P PY 1993 VL 42 BP 115 EP 118 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA06G UT WOS:A1993BA06G00023 ER PT B AU KORZENNIK, SG CACCIANI, A RHODES, EJ AF KORZENNIK, SG CACCIANI, A RHODES, EJ BE Brown, TM TI TOWARDS A BETTER DETERMINATION OF FREQUENCY SPLITTINGS AT INTERMEDIATE AND HIGH-DEGREE MODES - PRELIMINARY-RESULTS OF SECTORAL FREQUENCY SPLITTINGS FROM A 90-DAY OBSERVING RUN SO GONG 1992: SEISMIC INVESTIGATION OF THE SUN AND STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on GONG 1992: Seismic Investigation of the Sun and Stars CY AUG 11-14, 1993 CL BOULDER, CO SP GLOBAL OSCILLAT NETWORK GRP C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-61-9 J9 ASTR SOC P PY 1993 VL 42 BP 201 EP 204 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA06G UT WOS:A1993BA06G00039 ER PT B AU KORZENNIK, SG RHODES, EJ JOHNSON, NM AF KORZENNIK, SG RHODES, EJ JOHNSON, NM BE Brown, TM TI HELIOSEISMOLOGY ON A MASSIVELY-PARALLEL ARCHITECTURE - REDUCTION OF 1024 BY 1024 FULL-DISK DOPPLERGRAMS ON INTELS TOUCHSTONE DELTA-SUPERCOMPUTER SO GONG 1992: SEISMIC INVESTIGATION OF THE SUN AND STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on GONG 1992: Seismic Investigation of the Sun and Stars CY AUG 11-14, 1993 CL BOULDER, CO SP GLOBAL OSCILLAT NETWORK GRP C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-61-9 J9 ASTR SOC P PY 1993 VL 42 BP 461 EP 464 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA06G UT WOS:A1993BA06G00090 ER PT B AU NOYES, RW BROWN, TM HORNER, S KORZENNIK, S NISENSON, P AF NOYES, RW BROWN, TM HORNER, S KORZENNIK, S NISENSON, P BE Brown, TM TI AN ADVANCED FIBER OPTIC ECHELLE SPECTROGRAPH FOR ASTEROSEISMOLOGY SO GONG 1992: SEISMIC INVESTIGATION OF THE SUN AND STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on GONG 1992: Seismic Investigation of the Sun and Stars CY AUG 11-14, 1993 CL BOULDER, CO SP GLOBAL OSCILLAT NETWORK GRP C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-61-9 J9 ASTR SOC P PY 1993 VL 42 BP 485 EP 488 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA06G UT WOS:A1993BA06G00096 ER PT J AU RAND, H AF RAND, H TI ENVISIONING INFORMATION - TUFTE,ER SO HISTORY OF EUROPEAN IDEAS LA English DT Book Review RP RAND, H (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER ART,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-6599 J9 HIST EUR IDEA JI Hist. European Ideas PD JAN PY 1993 VL 17 IS 1 BP 106 EP 108 DI 10.1016/0191-6599(93)90014-H PG 3 WC Philosophy SC Philosophy GA KU751 UT WOS:A1993KU75100012 ER PT J AU RAND, H AF RAND, H TI SELF-CONSCIOUSNESS AND MEMORY IN EARLY MODERNISM SO HISTORY OF EUROPEAN IDEAS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF OF THE INTERNATIONAL SOC FOR THE STUDY OF EUROPEAN IDEAS CY SEP 03-08, 1990 CL CATHOLIC UNIV, LOUVAIN, BELGIUM SP INT SOC STUDY EUROPEAN IDEAS HO CATHOLIC UNIV RP RAND, H (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER ART,WASHINGTON,DC 20560, USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-6599 J9 HIST EUR IDEA JI Hist. European Ideas PD JAN PY 1993 VL 16 IS 4-6 BP 927 EP 933 DI 10.1016/0191-6599(93)90242-I PG 7 WC Philosophy SC Philosophy GA KR103 UT WOS:A1993KR10300079 ER PT J AU MOESER, V AF MOESER, V TI UNLOCKING ENIGMAS SECRETS SO IEEE ANNALS OF THE HISTORY OF COMPUTING LA English DT Editorial Material RP MOESER, V (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 1058-6180 J9 IEEE ANN HIST COMPUT JI IEEE Ann. Hist. Comput. PY 1993 VL 15 IS 3 BP 68 EP 69 PG 2 WC Computer Science, Theory & Methods; History & Philosophy Of Science SC Computer Science; History & Philosophy of Science GA LN083 UT WOS:A1993LN08300011 ER PT B AU NOYES, RW BROWN, TM HORNER, S KORZENNIK, S NISENSON, P AF NOYES, RW BROWN, TM HORNER, S KORZENNIK, S NISENSON, P BE Weiss, WW Baglin, A TI THE AFOE - A NEW INSTRUMENT FOR ASTEROSEISMOLOGY SO INSIDE THE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 137th IAU Colloquium on Inside the Stars CY SEP, 1992 CL UNIV VIENNA, VIENNA, AUSTRIA SP BUNDESMINIST WISSENSCH & FORSCH, INT ASTRON UNION, NOVA AEROSP, OSTERREICH FORSCHUNGSGEMEINSCH, OSTERREICH GESELL WELTRAUMFRAGEN, EUROPEAN COMMUNITY, SCI PROGRAM, UNIV WIEN HO UNIV VIENNA C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-59-7 J9 ASTR SOC P PY 1993 VL 40 BP 752 EP 754 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Q UT WOS:A1993BZ94Q00142 ER PT J AU ILAN, D VANDIVER, P SPAER, M AF ILAN, D VANDIVER, P SPAER, M TI AN EARLY GLASS BEAD FROM TEL-DAN SO ISRAEL EXPLORATION JOURNAL LA English DT Article C1 SMITHSONIAN INST,WASHINGTON,DC 20560. ISRAEL MUSEUM,JERUSALEM,ISRAEL. RP ILAN, D (reprint author), HEBREW UNION COLL,JERUSALEM,ISRAEL. NR 22 TC 1 Z9 1 U1 0 U2 0 PU ISRAEL EXPLOR SOC PI JERUSALEM PA POB 7041, JERUSALEM 91070, ISRAEL SN 0021-2059 J9 ISRAEL EXPLOR J JI Isr. Explor. J. PY 1993 VL 43 IS 4 BP 230 EP 234 PG 5 WC Archaeology SC Archaeology GA NB100 UT WOS:A1993NB10000002 ER PT J AU EBERHARD, W PEREIRA, F AF EBERHARD, W PEREIRA, F TI ULTRASTRUCTURE OF CRIBELLATE SILK OF 9 SPECIES IN 8 FAMILIES AND POSSIBLE TAXONOMIC IMPLICATIONS (ARANEAE, AMAUROBIIDAE, DEINOPIDAE, DESIDAE, DICTYNIDAE, FILISTATIDAE, HYPOCHILIDAE, STIPHIDIIDAE, TENGELLIDAE) SO JOURNAL OF ARACHNOLOGY LA English DT Article AB The ultrastructure of cribellum silk and associated fibers is described for nine species in eight families, and data from studies of 22 other species are summarized. Possible synapomorphies for filistatids (flattened cribellum fibers), for all cribellates other than hypochilids + filistatids (nodules on cribellum fibers), for deinopids + uloborids + dictynids, and for uloborids + dictynids (loss of reserve warp fibers) are described. Filistatid silk is distinctive and especially complex, and the spatial arrangement of different components is described for the first time. RP EBERHARD, W (reprint author), UNIV COSTA RICA,SMITHSONIAN TROP RES INST,SAN JOSE,COSTA RICA. NR 0 TC 40 Z9 42 U1 1 U2 8 PU AMER ARACHNOLOGICAL SOC PI NEW YORK PA C/O NORMAN I PLATNICK, AMER MUSEUM NATURAL HISTORY, CENTRAL PK WEST AT 79TH ST, NEW YORK, NY 10024 SN 0161-8202 J9 J ARACHNOL JI J. Arachnol. PY 1993 VL 21 IS 3 BP 161 EP 174 PG 14 WC Entomology SC Entomology GA MQ690 UT WOS:A1993MQ69000001 ER PT J AU BOCKSTAHLER, KR COATS, DW AF BOCKSTAHLER, KR COATS, DW TI SPATIAL AND TEMPORAL ASPECTS OF MIXOTROPHY IN CHESAPEAKE BAY DINOFLAGELLATES SO JOURNAL OF EUKARYOTIC MICROBIOLOGY LA English DT Article DE CILIATE; FOOD VACUOLE ID DIURNAL VERTICAL MIGRATION; POTERIOOCHROMONAS-MALHAMENSIS; LIFE-CYCLE; FOOD WEBS; MARINE; CILIATE; PREY; CARBON; CHRYSOPHYCEAE; CHLOROPLASTS AB Gymnodinium sanguineum, Gyrodinium uncatenum, and Ceratium furca are large phototrophic dinoflagellates that commonly form red tides in the mesohaline portion of Chesapeake Bay during the summer. Examination of protargol-stained specimens revealed that these dinoflagellates also feed heterotrophically as indicated by the presence of food vacuoles containing partially digested prey. Ingested prey were generally identified as nanociliates (greater-than-or-equal-to 20 mum) belonging to the oligotrich genera Strobilidium and Strombidium; occasionally other small ciliates (e.g. Balanion sp. and Mesodinium sp.), dinoflagellates, and diatoms were observed in early stages of digestion. The percentage of these mixotrophs that had ingested prey was usually less than 20%, but approached 30% in some samples. Occurrence of food vacuoles in Gymno. sanguineum was positively correlated with less-than-or-equal-to 20 mum oligotrichous ciliate density; limited data for Gyro. uncatenum suggests a similar relationship, but C. furca feeding was not related to nanociliate densities. RP BOCKSTAHLER, KR (reprint author), SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037, USA. NR 67 TC 97 Z9 104 U1 2 U2 12 PU SOC PROTOZOOLOGISTS PI LAWRENCE PA 810 E 10TH ST, LAWRENCE, KS 66044 SN 1066-5234 J9 J EUKARYOT MICROBIOL JI J. Eukaryot. Microbiol. PD JAN-FEB PY 1993 VL 40 IS 1 BP 49 EP 60 DI 10.1111/j.1550-7408.1993.tb04881.x PG 12 WC Microbiology SC Microbiology GA KQ688 UT WOS:A1993KQ68800009 ER PT J AU SRYGLEY, RB DUDLEY, R AF SRYGLEY, RB DUDLEY, R TI CORRELATIONS OF THE POSITION OF CENTER OF BODY-MASS WITH BUTTERFLY ESCAPE TACTICS SO JOURNAL OF EXPERIMENTAL BIOLOGY LA English DT Article DE FLIGHT; MANEUVERABILITY; PREDATION; BIOMECHANICS; CENTER OF MASS; BUTTERFLY ID HOVERING INSECT FLIGHT; FULGENS URANIIDAE MOTHS; NATURAL FREE FLIGHT; NEOTROPICAL BUTTERFLIES; POWER REQUIREMENTS; AERODYNAMICS; MORPHOLOGY; KINEMATICS; PREDATION; MORPHOMETRICS AB Using the evolution of neotropical butterflies as a natural experiment, we examine Ellington's biomechanical hypothesis that the position of center of body mass affects insect maneuverability. We find that the position of center of body mass is correlated with the butterflies' palatability, natural flight speeds and their ability to evade predators in a small cage. Relative to distasteful species, palatable butterflies fly faster and maneuver more successfully to evade attacks from aerial predators. The large thorax and short abdomen of palatable species position the center of body mass near to the wing base, whereas the mass allocation and body shape of distasteful butterflies position center of body mass further posteriorly. The position of center of body mass is an important indicator of flight performance, including both aerial maneuverability and flight speed, that warrants incorporation into future studies of invertebrate and vertebrate flight. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP SRYGLEY, RB (reprint author), UNIV TEXAS,DEPT ZOOL,AUSTIN,TX 78712, USA. NR 28 TC 77 Z9 79 U1 5 U2 15 PU COMPANY OF BIOLOGISTS LTD PI CAMBRIDGE PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE, CAMBS, ENGLAND CB4 4DL SN 0022-0949 J9 J EXP BIOL JI J. Exp. Biol. PD JAN PY 1993 VL 174 BP 155 EP 166 PG 12 WC Biology SC Life Sciences & Biomedicine - Other Topics GA KP157 UT WOS:A1993KP15700010 ER PT J AU BROWN, JL BUSH, M PACKER, C PUSEY, AE MONFORT, SL OBRIEN, SJ JANSSEN, DL WILDT, DE AF BROWN, JL BUSH, M PACKER, C PUSEY, AE MONFORT, SL OBRIEN, SJ JANSSEN, DL WILDT, DE TI HORMONAL CHARACTERISTICS OF FREE-RANGING FEMALE LIONS (PANTHERA-LEO) OF THE SERENGETI PLAINS AND NGORONGORO CRATER SO JOURNAL OF REPRODUCTION AND FERTILITY LA English DT Article ID PUMA FELIS-CONCOLOR; LUTEINIZING-HORMONE; REPRODUCTIVE PHYSIOLOGY; INVITRO FERTILIZATION; PLASMA-CONCENTRATIONS; OVARIECTOMIZED EWES; EMBRYO DEVELOPMENT; GENETIC-VARIATION; GONADAL RESPONSE; CLOUDED LEOPARD AB Pituitary responses to gonadotrophin-releasing hormone (GnRH) and prolactin and steroid secretory profiles were examined in two populations of adult, female lions in the Serengeti (one outbred in the Serengeti Plains and one inbred in the Ngorongoro Crater) to determine whether reductions in genetic variability adversely affected endocrine function. GnRH-induced gonadotrophin secretion was also examined after adrenocorticotrophic hormone (ACTH) treatment to determine whether acute increases in serum cortisol altered pituitary function. Anaesthetized lions were administered (i) saline i.v. after 10 and 100 min of blood sampling; (ii) saline at 10 min and GnRH (1 mug kg-1 body weight) after 100 min; or (iii) ACTH (3 mug kg-1) at 10 min and GnRH after 100 min of sampling. Basal serum cortisol and basal and GnRH-induced gonadotrophin secretion were similar (P > 0.05) between females of the Ngorongoro Crater and Serengeti Plains. After ACTH, serum cortisol increased two- to threefold over baseline values and the response was unaffected (P > 0.05) by location. ACTH-induced increases in serum cortisol had no effect on subsequent basal or GnRH-stimulated luteinizing hormone (LH) or follicle-stimulating hormone (FSH) secretion. Overall mean serum progesterone concentrations ranged from 0.2 to 5.4 ng ml-1 with the exception of four females (two in the Serengeti and two in the Crater, progesterone range, 18.4-46.5 ng ml-1) that were presumed pregnant (three of these females were observed nursing cubs several weeks later). There were no differences (P > 0.05) between Serengeti and Crater lions in mean serum progesterone, oestradiol or prolactin concentrations, and hormone secretion was not influenced (P > 0.05) by GnRH or ACTH treatment. Although Ngorongoro Crater lions have decreased genetic variability, the reproductive-endocrine system of females appears functionally normal compared with outbred counterparts living in the Serengeti Plains. Furthermore, the acute rise in serum cortisol after ACTH administration in lions fails to alter subsequent GnRH-induced gonadotrophin release, suggesting that short-term changes in adrenal activity do not markedly affect pituitary responsiveness in this species. C1 CONSERVAT & RES CTR,FRONT ROYAL,VA 22630. UNIV MINNESOTA,DEPT ECOL EVOLUT & BEH,MINNEAPOLIS,MN 55455. NCI,VIRAL CARCINOGENESIS LAB,FREDERICK,MD 21701. ZOOL SOC SAN DIEGO,DEPT VET SCI,SAN DIEGO,CA 92112. RP BROWN, JL (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008, USA. NR 44 TC 9 Z9 10 U1 1 U2 11 PU J REPROD FERTIL INC PI CAMBRIDGE PA 22 NEWMARKET RD, CAMBRIDGE, ENGLAND CB5 8DT SN 0022-4251 J9 J REPROD FERTIL JI J. Reprod. Fertil. PD JAN PY 1993 VL 97 IS 1 BP 107 EP 114 PG 8 WC Reproductive Biology SC Reproductive Biology GA KK741 UT WOS:A1993KK74100016 PM 8385220 ER PT J AU DUNN, BS WELDON, PJ HOWARD, RW MCDANIEL, CA AF DUNN, BS WELDON, PJ HOWARD, RW MCDANIEL, CA TI LIPIDS FROM THE PARACLOACAL GLANDS OF THE CHINESE ALLIGATOR (ALLIGATOR-SINENSIS) SO LIPIDS LA English DT Note ID DIMETHYL DISULFIDE DERIVATIVES; THIN-LAYER CHROMATOGRAPHY; MASS-SPECTROMETRY; DOUBLE-BOND; MISSISSIPPIENSIS; SECRETIONS; POSITION AB Lipids from the paracloacal glands of adult Chinese alligators (Alligator sinensis) were analyzed by gas chromatography/mass spectrometry. Acetates, aliphatic alcohols, free fatty acids and waxes consisting primarily of hexadecanoates were indicated in the secretions of males and females. Cholesterol, a diterpene hydrocarbon, and a diterpene ketone were detected in secretions of males but not in those of females. Lipids identified in the paracloacal secretions of A. sinensis are compared with those reported from the American alligator and other crocodilians. C1 TEXAS A&M UNIV SYST,DEPT BIOL,COLL STN,TX 77843. SMITHSONIAN INST,DEPT HERPETOL,NATL ZOOL PK,WASHINGTON,DC 20008. USDA ARS,NATL GRAIN MARKETING RES LAB,MANHATTAN,KS 66502. FORESTRY SCI LAB,SOUTHERN FOREST EXPT STN,GULFPORT,MS 39505. NR 16 TC 12 Z9 13 U1 0 U2 3 PU AMER OIL CHEMISTS SOC PI CHAMPAIGN PA 1608 BROADMOOR DRIVE, CHAMPAIGN, IL 61821-0489 SN 0024-4201 J9 LIPIDS JI Lipids PD JAN PY 1993 VL 28 IS 1 BP 75 EP 78 DI 10.1007/BF02536366 PG 4 WC Biochemistry & Molecular Biology; Nutrition & Dietetics SC Biochemistry & Molecular Biology; Nutrition & Dietetics GA KK966 UT WOS:A1993KK96600016 PM 27519768 ER PT B AU KUIJKEN, K AF KUIJKEN, K BE Sasselov, DD TI THE STELLAR HALO SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 3 EP 10 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00001 ER PT B AU DUPREE, AK AF DUPREE, AK BE Sasselov, DD TI ATMOSPHERES AND WINDS OF HIGH-LATITUDE SUPERGIANTS SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 73 EP 86 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00009 ER PT B AU WHITNEY, BA BALM, S CLAYTON, GC AF WHITNEY, BA BALM, S CLAYTON, GC BE Sasselov, DD TI DUST FORMATION IN RCB STARS SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 15 Z9 15 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 115 EP 122 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00012 ER PT B AU ALCOLEA, J BUJARRABAL, V PLANESAS, P AF ALCOLEA, J BUJARRABAL, V PLANESAS, P BE Sasselov, DD TI MOLECULAR OBSERVATIONS OF POST-AGB STARS SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Planesas, Pere/G-7950-2015 OI Planesas, Pere/0000-0002-7808-3040 NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 123 EP 129 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00013 ER PT B AU WHITNEY, BA DUPREE, AK ZUCKER, DB AF WHITNEY, BA DUPREE, AK ZUCKER, DB BE Sasselov, DD TI CALCIUM-II K LINE-PROFILES OF HIGH-LATITUDE SUPERGIANTS SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 212 EP 216 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00024 ER PT B AU DONAHUE, RA RAO, LM BALIUNAS, SL DUPREE, AK AF DONAHUE, RA RAO, LM BALIUNAS, SL DUPREE, AK BE Sasselov, DD TI LONG-TERM PHOTOMETRIC MONITORING OF THE YELLOW SUPERGIANT 89 HERCULIS SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 285 EP 289 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00032 ER PT B AU RAO, LM BALIUNAS, SL ROBINSON, CR FRAZER, J WOODARD, L DONAHUE, RA AF RAO, LM BALIUNAS, SL ROBINSON, CR FRAZER, J WOODARD, L DONAHUE, RA BE Sasselov, DD TI CA II H AND K VARIATIONS OF A SAMPLE OF HYBRID STARS - DO HYBRIDS PULSATE SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 8 Z9 8 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 300 EP 308 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00035 ER PT B AU CHRISTODOULOU, DM SASSELOV, DD TOHLINE, JE AF CHRISTODOULOU, DM SASSELOV, DD TOHLINE, JE BE Sasselov, DD TI STAR-FORMATION VIA THE PHASE-TRANSITION IN A LOW-DENSITY GAS SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 365 EP 374 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00043 ER PT B AU SOKER, N AF SOKER, N BE Sasselov, DD TI A DEFINITION FOR A BINARY-SYSTEM SO LUMINOUS HIGH-LATITUDE STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Workshop on Luminous High-Latitude Stars CY MAY 28-30, 1992 CL HARVARD-SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS HO HARVARD-SMITHSONIAN CTR ASTROPHYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-64-3 J9 ASTR SOC P PY 1993 VL 45 BP 415 EP 418 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94U UT WOS:A1993BZ94U00050 ER PT J AU HOUBRICK, RS AF HOUBRICK, RS TI PHYLOGENETIC-RELATIONSHIPS AND GENERIC REVIEW OF THE BITTIINAE (PROSOBRANCHIA, CERITHIOIDEA) SO MALACOLOGIA LA English DT Review DE BITTIINAE; BITTIUM; CERITHIOIDEA; ANATOMY; TAXONOMY; PHYLOGENETIC ANALYSIS ID CERITHIIDAE; ANATOMY; SYSTEMATICS; GASTROPODA AB The anatomy of seven members of the Bittium group is described, clarifying the status of the genus-level taxa comprising it. Bittium reticulatum, the type species of Bittium Gray, is described in depth, thereby establishing criteria for comparisons with other taxa of Bittiinae. The type species of Stylidium Dall and Lirobittium Bartsch, and representatives of Bittiolum Cossmann and Cacozeliana Strand are examined and compared with Bittium, s.s. Results of anatomical studies and a phylogenetic analysis using the Henning86 and CLADOS programs, with Cerithium as an outgroup, establish monophyly for Bittiinae Cossmann and reveal six different genus-level taxa. A new genus, Ittibittium, from the Indo-Pacific, is proposed. Synonymies of each genus-level taxon and representative species examined are presented. Brief accounts of the ecology and zoogeography of each taxon are given. Two taxa formerly attributed to the Bittium-group are herein excluded from it and referred to Cerithium Bruguiere. These are Cerithium zebrum Kiener, 1841, and Cerithium boeticum Pease, 1861. The subfamily Bittiinae Cossmann, 1906, is thought to comprise nine genera (four of which were not included in phylogenetic analyses) : Bittium Gray, 1847; Bittiolum Cossmann, 1906; Ittibittium gen. n., Stylidium Dall, 1907; Lirobittium Bartsch, 1911; Cacozeliana Strand, 1928; Argyropeza Melvill and Standen, 1901; Varicopeza Grundel, 1976; Zebittium Finlay, 1927. The genus Cassiella Gofas, 1987, of uncertain placement, is included as a possible member of the group. RP HOUBRICK, RS (reprint author), SMITHSONIAN INST, NATL MUSEUM NAT HIST, DEPT INVERTEBRATE ZOOL, WASHINGTON, DC 20560 USA. NR 157 TC 28 Z9 36 U1 1 U2 6 PU INST MALACOL PI ANN ARBOR PA 2415 SOUTH CIRCLE DR, ANN ARBOR, MI 48103 SN 0076-2997 J9 MALACOLOGIA JI Malacologia PY 1993 VL 35 IS 2 BP 261 EP 313 PG 53 WC Zoology SC Zoology GA MK187 UT WOS:A1993MK18700002 ER PT S AU SEIDENSTICKER, J MCDOUGAL, C AF SEIDENSTICKER, J MCDOUGAL, C BE Dunstone, N Gorman, ML TI TIGER PREDATORY BEHAVIOR, ECOLOGY AND CONSERVATION SO MAMMALS AS PREDATORS SE SYMPOSIA OF THE ZOOLOGICAL SOCIETY OF LONDON LA English DT Proceedings Paper CT Symposium on Mammals as Predators CY NOV 22-23, 1991 CL ZOOL SOC LONDON, LONDON, ENGLAND SP ZOOL SOC LONDON HO ZOOL SOC LONDON C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20560. NR 0 TC 5 Z9 5 U1 3 U2 11 PU OXFORD UNIVERSITY PRESS PI OXFORD PA WALTON ST, OXFORD, ENGLAND OX2 6DP SN 0084-5612 BN 0-19-854067-1 J9 SYM ZOOL S PY 1993 IS 65 BP 105 EP 125 PG 21 WC Behavioral Sciences; Ecology; Zoology SC Behavioral Sciences; Environmental Sciences & Ecology; Zoology GA BA75B UT WOS:A1993BA75B00006 ER PT J AU GARRITY, SD LEVINGS, SC AF GARRITY, SD LEVINGS, SC TI EFFECTS OF AN OIL-SPILL ON SOME ORGANISMS LIVING ON MANGROVE (RHIZOPHORA-MANGLE L) ROOTS IN LOW WAVE-ENERGY HABITATS IN CARIBBEAN PANAMA SO MARINE ENVIRONMENTAL RESEARCH LA English DT Article AB Following the discharge of more than 50 000 barrels of crude oil into a tropical, mangrove-fringed estuary, we examined the effects of oiling on the epibiota of mangrove (Rhizophora mangle) prop roots. Using data taken four years before the spill and for a year after the spill, we assessed the possible value of four bivalves and one barnacle as indicators of damage from oiling. Quarterly comparisons of abundances at matched oiled and unoiled sites showed strong indirect evidence of population reductions in six of seven comparisons. However, the shells of only two species persisted long enough on roots (3-6 months) to be useful direct indicators of recent mortality. Knowledge of conditions four years before oiling was important in establishing the extent of damage from this oil spill. Population reductions were most striking in brackish streams, where intertidal and subtidal mussels and barnacles were quickly devastated at oiled sites and showed no recovery during the year after the spill, and for an intertidal oyster in channels and lagoons. All other species showed at least some negative effects of oiling, but the strength of the evidence varied over time and among species. RP GARRITY, SD (reprint author), SMITHSONIAN TROP RES INST,BOX 2072,BALBOA,PANAMA. NR 44 TC 9 Z9 9 U1 1 U2 13 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0141-1136 J9 MAR ENVIRON RES JI Mar. Environ. Res. PY 1993 VL 35 IS 3 BP 251 EP 271 DI 10.1016/0141-1136(93)90097-J PG 21 WC Environmental Sciences; Marine & Freshwater Biology; Toxicology SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Toxicology GA KM378 UT WOS:A1993KM37800002 ER PT J AU PABST, DA AF PABST, DA TI A NEWLY DESCRIBED MUSCLE IN ODONTOCETE CETACEANS SO MARINE MAMMAL SCIENCE LA English DT Note C1 SMITHSONIAN INST,WASHINGTON,DC 20560. RP PABST, DA (reprint author), JAMES MADISON UNIV,DEPT BIOL,HARRISONBURG,VA 22807, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU SOC MARINE MAMMALOGY PI LAWRENCE PA 1041 NEW HAMPSHIRE ST, LAWRENCE, KS 66044 SN 0824-0469 J9 MAR MAMMAL SCI JI Mar. Mamm. Sci. PD JAN PY 1993 VL 9 IS 1 BP 81 EP 83 DI 10.1111/j.1748-7692.1993.tb00429.x PG 3 WC Marine & Freshwater Biology; Zoology SC Marine & Freshwater Biology; Zoology GA KN851 UT WOS:A1993KN85100009 ER PT J AU BUZAS, MA CULVER, SJ JORISSEN, FJ AF BUZAS, MA CULVER, SJ JORISSEN, FJ TI A STATISTICAL EVALUATION OF THE MICROHABITATS OF LIVING (STAINED) INFAUNAL BENTHIC FORAMINIFERA SO MARINE MICROPALEONTOLOGY LA English DT Article ID ATLANTIC AB A total of 66 statistical analyses were made on published data for 48 taxa from replicate cores ranging in water depths from < 1 m to 2975 m. Species with maximum densities in the top 2 cm were classified as shallow infaunal (SI). Species with maximum densities extending below 2 cm were classified as deep infaunal (DI). At < 1 m depths, 14% of the analyses indicate SI habitats, at 85 and 202 m depths 82% and at 895-2975 m depths 35%. Nine taxa are exclusively SI, only two of these have more than one analysis, and none are from < 1 m. Most taxa, therefore, are DI. The two species exhibiting subsurface density maxima, for which multiple analyses were possible, do not do so exclusively. Arenaceous taxa are usually DI. Our assignment of taxa into SI or DI infaunal habitats based on their morphology had a 75% accuracy. The data suggest that as more observations are made, it becomes increasingly difficult to assign a species exclusively to a specific habitat category. C1 OLD DOMINION UNIV,DEPT GEOL SCI,NORFOLK,VA 23529. INST EARTH SCI,3584 CD UTRECHT,NETHERLANDS. RP BUZAS, MA (reprint author), SMITHSONIAN INST,DEPT PALEOBIOL,WASHINGTON,DC 20560, USA. RI Jorissen, Frans/D-2392-2009 NR 35 TC 82 Z9 87 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-8398 J9 MAR MICROPALEONTOL JI Mar. Micropaleontol. PD JAN PY 1993 VL 20 IS 3-4 BP 311 EP 320 DI 10.1016/0377-8398(93)90040-5 PG 10 WC Paleontology SC Paleontology GA KR302 UT WOS:A1993KR30200011 ER PT S AU SUH, Y BLAKE, JA BRAUN, MJ AF SUH, Y BLAKE, JA BRAUN, MJ BE Zimmer, EA White, TJ Cann, RL Wilson, AC TI EQUIPPING AND ORGANIZING COMPARATIVE MOLECULAR-GENETICS LABORATORIES SO MOLECULAR EVOLUTION: PRODUCING THE BIOCHEMICAL DATA SE Methods in Enzymology LA English DT Review ID POLYMERASE CHAIN-REACTION; DNA POLYMORPHISMS; SEQUENCE C1 SMITHSONIAN INST, NATL MUSEUM NAT HIST, MOLEC SYSTEMAT LAB, WASHINGTON, DC 20560 USA. RP SUH, Y (reprint author), SEOUL NATL UNIV, NAT PROD RES INST, SEOUL 110460, SOUTH KOREA. NR 27 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA SN 0076-6879 BN 0-12-182125-0 J9 METHOD ENZYMOL JI Methods Enzymol. PY 1993 VL 224 BP 3 EP 22 DI 10.1016/0076-6879(93)24002-C PG 20 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BZ58X UT WOS:A1993BZ58X00001 PM 8264395 ER PT J AU BULT, CJ KIANG, YT AF BULT, CJ KIANG, YT TI ONE-DIMENSIONAL ELECTROPHORETIC COMPARISONS OF PLANT-PROTEINS SO MOLECULAR EVOLUTION: PRODUCING THE BIOCHEMICAL DATA SE METHODS IN ENZYMOLOGY LA English DT Review ID STARCH-GEL ELECTROPHORESIS; POPULATIONS; COMPILATION; ISOZYMES; BUFFERS C1 UNIV NEW HAMPSHIRE,DEPT PLANT BIOL,DURHAM,NH 03824. RP BULT, CJ (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560, USA. NR 27 TC 1 Z9 1 U1 0 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Methods Enzymol. PY 1993 VL 224 BP 81 EP 97 DI 10.1016/0076-6879(93)24007-H PG 17 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BZ58X UT WOS:A1993BZ58X00006 PM 8264418 ER PT J AU TUROSS, N STATHOPLOS, L AF TUROSS, N STATHOPLOS, L TI ANCIENT PROTEINS IN FOSSIL BONES SO MOLECULAR EVOLUTION: PRODUCING THE BIOCHEMICAL DATA SE METHODS IN ENZYMOLOGY LA English DT Review ID DNA; SYSTEMATICS; OSTEOCALCIN; EXTRACTION; COLLAGEN RP TUROSS, N (reprint author), SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560, USA. NR 36 TC 41 Z9 41 U1 1 U2 6 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Methods Enzymol. PY 1993 VL 224 BP 121 EP 129 DI 10.1016/0076-6879(93)24010-R PG 9 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BZ58X UT WOS:A1993BZ58X00009 PM 8264383 ER PT J AU BOWDITCH, BM ALBRIGHT, DG WILLIAMS, JGK BRAUN, MJ AF BOWDITCH, BM ALBRIGHT, DG WILLIAMS, JGK BRAUN, MJ TI USE OF RANDOMLY AMPLIFIED POLYMORPHIC DNA MARKERS IN COMPARATIVE GENOME STUDIES SO MOLECULAR EVOLUTION: PRODUCING THE BIOCHEMICAL DATA SE METHODS IN ENZYMOLOGY LA English DT Review ID ARBITRARY PRIMERS; PCR C1 PIONEER HI BRED INT INC,JOHNSTON,IA 50131. RP BOWDITCH, BM (reprint author), SMITHSONIAN INST,NATL MUSEUM NAT HIST,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560, USA. NR 16 TC 118 Z9 130 U1 0 U2 4 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Methods Enzymol. PY 1993 VL 224 BP 294 EP 309 DI 10.1016/0076-6879(93)24022-M PG 16 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BZ58X UT WOS:A1993BZ58X00021 PM 8264394 ER PT J AU JUPE, ER ZIMMER, EA AF JUPE, ER ZIMMER, EA TI ASSAYING DIFFERENTIAL RIBOSOMAL-RNA GENE-EXPRESSION WITH ALLELE-SPECIFIC PROBES SO MOLECULAR EVOLUTION: PRODUCING THE BIOCHEMICAL DATA SE METHODS IN ENZYMOLOGY LA English DT Review ID SYNTHETIC OLIGONUCLEOTIDES; DNA; HYBRIDIZATION; MUTATION; MAIZE; SEQUENCE C1 SMITHSONIAN INST,NATL MUSEUM NAT HIST,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560. RP JUPE, ER (reprint author), UNIV CINCINNATI,COLL MED,DEPT MOLEC GENET,CINCINNATI,OH 45267, USA. NR 19 TC 1 Z9 1 U1 0 U2 0 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Methods Enzymol. PY 1993 VL 224 BP 541 EP 552 DI 10.1016/0076-6879(93)24040-2 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BZ58X UT WOS:A1993BZ58X00039 PM 8264409 ER PT J AU GLASER, JR AF GLASER, JR TI MUSEUM CAREERS IN THE UNITED-STATES - A NONSYSTEM SO MUSEUM INTERNATIONAL LA English DT Article RP GLASER, JR (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBL LTD PI OXFORD PA 108 COWLEY RD, OXFORD, OXON, ENGLAND OX4 1JF SN 1350-0775 J9 MUSEUM INT JI Mus. Int. PY 1993 VL 45 IS 4 BP 18 EP 21 PG 4 WC Art SC Art GA MK843 UT WOS:A1993MK84300005 ER PT J AU CASE, M AF CASE, M TI THE MANUAL OF MUSEUM PLANNING - LORD,GB, LORD,B SO MUSEUM INTERNATIONAL LA English DT Book Review RP CASE, M (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBL LTD PI OXFORD PA 108 COWLEY RD, OXFORD, OXON, ENGLAND OX4 1JF SN 1350-0775 J9 MUSEUM INT JI Mus. Int. PY 1993 VL 45 IS 1 BP 60 EP 61 PG 2 WC Art SC Art GA LW990 UT WOS:A1993LW99000016 ER PT J AU CASE, M AF CASE, M TI FORWARD PLANNING - A HANDBOOK OF BUSINESS, CORPORATE, AND DEVELOPMENT-PLANNING FOR MUSEUMS AND GALLERIES - AMBROSE,T, RENYARD,S SO MUSEUM INTERNATIONAL LA English DT Book Review RP CASE, M (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBL LTD PI OXFORD PA 108 COWLEY RD, OXFORD, OXON, ENGLAND OX4 1JF SN 1350-0775 J9 MUSEUM INT JI Mus. Int. PY 1993 VL 45 IS 1 BP 60 EP 61 PG 2 WC Art SC Art GA LW990 UT WOS:A1993LW99000017 ER PT B AU HAZEN, ML AF HAZEN, ML BE Nemec, JM Matthews, JM TI SEARCH FOR VARIABLES IN THE GALACTIC GLOBULAR CLUSTERS NGC-6544 AND NGC-6642 SO NEW PERSPECTIVES ON STELLAR PULSATION AND PULSATING VARIABLE STARS SE IAU COLLOQUIUM LA English DT Proceedings Paper CT IAU Colloquium 139 on New Perspectives on Stellar Pulsation and Pulsating Variable Stars CY JUL 15-18, 1992 CL VICTORIA, CANADA SP INT ASTRON UNION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-44382-2 J9 IAU COLLOQ PY 1993 VL 139 BP 337 EP 337 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC55S UT WOS:A1993BC55S00071 ER PT J AU CAIRNS, SD GRANTMACKIE, JA AF CAIRNS, SD GRANTMACKIE, JA TI REVIEW OF THE FOSSIL STYLASTERIDAE (CNIDARIA, HYDROZOA) FROM THE NEW-ZEALAND REGION SO NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS LA English DT Article DE CNIDARIA; HYDROZOA; STYLASTERIDAE; NEW TAXON; STYLASTER-GIGAS; NEW RECORDS; CENOZOIC; NEW-ZEALAND; CHATHAM-ISLANDS AB The five previously reported fossil calcified hydroids from the New Zealand region are discussed, resulting in: a change of generic placement of two species (Stylaster sensu Jones, 1970 to Calyptopora; and Paraerrina sensu Squires, 1962 to Lepidopora), and a query of the identification of Sporadopora mortenseni sensu Squires, 1962. Several records of bryozoans reported as stylasterids are also rectified. Four additional fossil stylasterids are reported from the region: indeterminate species of Inferiolabiata and Conopora from the early Miocene (Otaian) of Pakaurangi Point; a species of Errina from the early to middle Eocene (Waipawan-Bortonian) of Chatham Island; and a new species, Stylaster gigas, from the early Pliocene (Opoitian) of Kaawa Beach, North Island. S. gigas has one of the most massive coralla of any known stylasterid. The nine fossil stylasterids now known from the New Zealand region range from the early Eocene to the late Pliocene and are found from both North and South Islands as well as Chatham and Pitt Islands. C1 UNIV AUCKLAND,DEPT GEOL,AUCKLAND,NEW ZEALAND. RP CAIRNS, SD (reprint author), SMITHSONIAN INST,DEPT INVERTEBRATE ZOOL,NHB-163,W-329,WASHINGTON,DC 20560, USA. NR 20 TC 5 Z9 5 U1 1 U2 6 PU SIR PUBLISHING PI WELLINGTON PA PO BOX 399, WELLINGTON, NEW ZEALAND SN 0028-8306 J9 NEW ZEAL J GEOL GEOP JI N. Z. J. Geol. Geophys. PY 1993 VL 36 IS 1 BP 1 EP 8 PG 8 WC Geology; Geosciences, Multidisciplinary SC Geology GA LH096 UT WOS:A1993LH09600001 ER PT B AU SMITH, PL AF SMITH, PL BE Guidry, MW Strayer, MR TI ATOMIC DATA FOR MODELING THE OPTICAL-SPECTRA OF SUPERNOVAE - AN INTRODUCTION TO THE GRAY LITERATURE SO NUCLEAR PHYSICS IN THE UNIVERSE LA English DT Proceedings Paper CT 1st Symposium on Nuclear Physics in the Universe CY SEP 24-26, 1992 CL OAK RIDGE, TN SP OAK RIDGE NATL LAB, THEORET PHYS SECT, VANDERBILT UNIV & DREXEL UNIV, JOINT INST HEAVY ION RES C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX BN 0-7503-0279-8 PY 1993 BP 387 EP 398 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BA21Q UT WOS:A1993BA21Q00028 ER PT S AU THIELEMANN, FK AF THIELEMANN, FK BE Neugart, R Wohr, A TI UNSTABLE NUCLEI IN ASTROPHYSICS SO NUCLEI FAR FROM STABILITY/ATOMIC MASSES AND FUNDAMENTAL CONSTANTS 1992 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 6th International Conference on Nuclei Far From Stability/9th International Conference on Atomic Masses and Fundamental Constants CY JUL 19-24, 1992 CL BERNKASTEL KUES, GERMANY SP BUNDESMINIST FORSCHUNG & TECHNOL, DEUT FORSCHUNGSGEMEINSCH, DEUT PHYS GESELL, EUROPEAN PHYS SOC, GESELL SCHWERIONENFORSCHUNG, INT UNION PURE & APPL PHYS, JOHANNES GUTENBERG UNIV MAINZ, MINIST WISSENSCH & WEITERBILDUNG RHEINLAND PFALZ, BITBURGER BRAUEREI TH SIMON GMBH, C H BOEHRINGER SOHN, COHERENT GMBH, DANFYSIK A S, EG & G ORTEC, LAMBDA PHYS, SCHOTT GLASWERKE ID WHITE-DWARF MODELS; EXPLOSIVE NUCLEOSYNTHESIS; I SUPERNOVAE; R-PROCESS; HYDROSTATIC NUCLEOSYNTHESIS; MASSIVE STARS; S-PROCESS; ABUNDANCES; MECHANISMS; EVOLUTION AB Astrophysical simulations require the knowledge of a wealth of nuclear reactions, which (a) explain the synthesis and abundance patterns of nuclei in nature, and (b) are the energy source of many stellar events via static or explosive nuclear burning. Especially in explosive burning, many unstable nuclei can be produced. Dependent on the total neutron/proton ratio of the fuel composition (hydrogen-rich or neutron-rich), nuclei close to the proton or neutron drip lines can be produced and it is of paramount importance to know their masses, decay properties, and reaction cross sections. After a brief review of hydrostatic burning stages in stellar evolution, we focus on explosive burning and the three processes (p or gamma-process, rp-process, and r-process), which produce unstable nuclei in supernovae, novae, and X-ray bursts. The observed abundance pattern of stable nuclei and nuclear-physics knowledge far from stability can be of great use to constrain the conditions in astrophysical production sites. RP THIELEMANN, FK (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 60 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0262-3 J9 INST PHYS CONF SER PY 1993 IS 132 BP 819 EP 828 PG 10 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BA03H UT WOS:A1993BA03H00158 ER PT B AU SCHMIDT, BP KIRSHNER, RP EASTMAN, RG AF SCHMIDT, BP KIRSHNER, RP EASTMAN, RG BE Chincarini, G Iovino, A Maccacaro, T Maccagni, D TI EXPANDING PHOTOSPHERES OF TYPE-II SUPERNOVAE AND THE QUEST FOR H(O) SO OBSERVATIONAL COSMOLOGY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Symposium on Observational Cosmology CY SEP 21-25, 1992 CL MILAN, ITALY SP CNR, IST FIS COSMICA, OSSERV ASTRON BRERA, UNIV MILANO, PHYS DEPT, EUROPEAN ASTRON SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-70-8 J9 ASTR SOC P PY 1993 VL 51 BP 30 EP 36 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Y UT WOS:A1993BZ94Y00004 ER PT B AU VOGELEY, M GELLER, M HUCHRA, J PARK, C GOTT, JR AF VOGELEY, M GELLER, M HUCHRA, J PARK, C GOTT, JR BE Chincarini, G Iovino, A Maccacaro, T Maccagni, D TI MEASURES OF LARGE-SCALE STRUCTURE IN THE CFA REDSHIFT SURVEY SO OBSERVATIONAL COSMOLOGY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Symposium on Observational Cosmology CY SEP 21-25, 1992 CL MILAN, ITALY SP CNR, IST FIS COSMICA, OSSERV ASTRON BRERA, UNIV MILANO, PHYS DEPT, EUROPEAN ASTRON SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-70-8 J9 ASTR SOC P PY 1993 VL 51 BP 125 EP 131 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Y UT WOS:A1993BZ94Y00025 ER PT B AU DUBINSKI, J DACOSTA, LN GOLDWIRTH, DS LECAR, M PIRAN, T AF DUBINSKI, J DACOSTA, LN GOLDWIRTH, DS LECAR, M PIRAN, T BE Chincarini, G Iovino, A Maccacaro, T Maccagni, D TI VOID EVOLUTION AND THE LARGE-SCALE STRUCTURE SO OBSERVATIONAL COSMOLOGY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Symposium on Observational Cosmology CY SEP 21-25, 1992 CL MILAN, ITALY SP CNR, IST FIS COSMICA, OSSERV ASTRON BRERA, UNIV MILANO, PHYS DEPT, EUROPEAN ASTRON SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-70-8 J9 ASTR SOC P PY 1993 VL 51 BP 188 EP 189 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Y UT WOS:A1993BZ94Y00044 ER PT B AU SCHACHTER, J ELVIS, M VOGES, W AF SCHACHTER, J ELVIS, M VOGES, W BE Chincarini, G Iovino, A Maccacaro, T Maccagni, D TI COSMOLOGICAL IMPLICATIONS OF SLEW SURVEY SOURCE SAMPLES SO OBSERVATIONAL COSMOLOGY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Symposium on Observational Cosmology CY SEP 21-25, 1992 CL MILAN, ITALY SP CNR, IST FIS COSMICA, OSSERV ASTRON BRERA, UNIV MILANO, PHYS DEPT, EUROPEAN ASTRON SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-70-8 J9 ASTR SOC P PY 1993 VL 51 BP 475 EP 476 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Y UT WOS:A1993BZ94Y00110 ER PT B AU DELLANTONIO, IP RYBICKI, GB AF DELLANTONIO, IP RYBICKI, GB BE Chincarini, G Iovino, A Maccacaro, T Maccagni, D TI SPECTRAL DISTORTIONS IN THE CMB FROM RECOMBINATION SO OBSERVATIONAL COSMOLOGY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Symposium on Observational Cosmology CY SEP 21-25, 1992 CL MILAN, ITALY SP CNR, IST FIS COSMICA, OSSERV ASTRON BRERA, UNIV MILANO, PHYS DEPT, EUROPEAN ASTRON SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 8 Z9 8 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-70-8 J9 ASTR SOC P PY 1993 VL 51 BP 548 EP 553 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Y UT WOS:A1993BZ94Y00124 ER PT B AU FIORE, F ELVIS, M WILKES, B MCDOWELL, J BECHTOLD, J AF FIORE, F ELVIS, M WILKES, B MCDOWELL, J BECHTOLD, J BE Chincarini, G Iovino, A Maccacaro, T Maccagni, D TI ROSAT OBSERVATIONS OF HIGH-REDSHIFT QUASARS SO OBSERVATIONAL COSMOLOGY SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT International Symposium on Observational Cosmology CY SEP 21-25, 1992 CL MILAN, ITALY SP CNR, IST FIS COSMICA, OSSERV ASTRON BRERA, UNIV MILANO, PHYS DEPT, EUROPEAN ASTRON SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-70-8 J9 ASTR SOC P PY 1993 VL 51 BP 604 EP 605 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94Y UT WOS:A1993BZ94Y00140 ER PT B AU FATA, R FABRICANT, D AF FATA, R FABRICANT, D BE Vukobratovich, D Yoder, PR Genberg, VL TI DESIGN OF A CELL FOR THE WIDE-FIELD CORRECTOR FOR THE CONVERTED MMT SO OPTOMECHANICAL DESIGN SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optomechanical Design CY JUL 15-16, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 18 Z9 18 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1247-3 J9 P SOC PHOTO-OPT INS PY 1993 VL 1998 BP 32 EP 38 DI 10.1117/12.156628 PG 7 WC Engineering, Mechanical; Optics SC Engineering; Optics GA BZ45N UT WOS:A1993BZ45N00004 ER PT J AU HENSON, PM AF HENSON, PM TI THE COMSTOCK RESEARCH SCHOOL IN EVOLUTIONARY ENTOMOLOGY SO OSIRIS LA English DT Article RP HENSON, PM (reprint author), SMITHSONIAN INST ARCHIVES,MRC 414,WASHINGTON,DC 20560, USA. NR 71 TC 10 Z9 10 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0369-7827 J9 OSIRIS JI Osiris PY 1993 VL 8 BP 159 EP 177 PG 19 WC History & Philosophy Of Science SC History & Philosophy of Science GA MF809 UT WOS:A1993MF80900009 PM 11639579 ER PT B AU WEEKES, TC AF WEEKES, TC BE Fontaine, G TranThanhVan, J TI TEV GAMMA-RAY ASTRONOMY - STATUS-REPORT SO PARTICLE ASTROPHYSICS: INTERDISCIPLINARY COLLOQUIUM OF THE COMITE-NATIONAL-DE-LA-RECHERCHE-SCIENTIFIQUE LA English DT Proceedings Paper CT 4th Rencontres-de-Blois on Particle Astrophysics CY JUN 15-20, 1992 CL CHATEAU BLOIS, FRANCE SP COM NATL RECH SCI, INST NATL PHYS NUCL & PHYS PARTICLES, CEA, MINIST RECH & TECHNOL, CONSEIL REG REG CTR, CONSEIL GEN LOIR & CHER, VILLE BLOIS, INFOPRISM, MINOLTA, POULAIN, TAITTINGER C1 WHIPPLE OBSERV,HARVARD SMITHSONIAN CTR ASTROPHYS,AMADO,AZ 85645. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-133-1 PY 1993 BP 163 EP 174 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB04D UT WOS:A1993BB04D00014 ER PT B AU CARROLL, SM FARHI, E GUTH, AH AF CARROLL, SM FARHI, E GUTH, AH BE Fontaine, G TranThanhVan, J TI OBSTACLES TO TIME MACHINE CONSTRUCTION IN (2+1) DIMENSIONS SO PARTICLE ASTROPHYSICS: INTERDISCIPLINARY COLLOQUIUM OF THE COMITE-NATIONAL-DE-LA-RECHERCHE-SCIENTIFIQUE LA English DT Proceedings Paper CT 4th Rencontres-de-Blois on Particle Astrophysics CY JUN 15-20, 1992 CL CHATEAU BLOIS, FRANCE SP COM NATL RECH SCI, INST NATL PHYS NUCL & PHYS PARTICLES, CEA, MINIST RECH & TECHNOL, CONSEIL REG REG CTR, CONSEIL GEN LOIR & CHER, VILLE BLOIS, INFOPRISM, MINOLTA, POULAIN, TAITTINGER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-133-1 PY 1993 BP 507 EP 510 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB04D UT WOS:A1993BB04D00044 ER PT B AU GARRETSON, WD FIELD, GB CARROLL, SM AF GARRETSON, WD FIELD, GB CARROLL, SM BE Fontaine, G TranThanhVan, J TI PRIMORDIAL MAGNETIC-FIELDS FROM PSEUDO-GOLDSTONE BOSONS SO PARTICLE ASTROPHYSICS: INTERDISCIPLINARY COLLOQUIUM OF THE COMITE-NATIONAL-DE-LA-RECHERCHE-SCIENTIFIQUE LA English DT Proceedings Paper CT 4th Rencontres-de-Blois on Particle Astrophysics CY JUN 15-20, 1992 CL CHATEAU BLOIS, FRANCE SP COM NATL RECH SCI, INST NATL PHYS NUCL & PHYS PARTICLES, CEA, MINIST RECH & TECHNOL, CONSEIL REG REG CTR, CONSEIL GEN LOIR & CHER, VILLE BLOIS, INFOPRISM, MINOLTA, POULAIN, TAITTINGER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-133-1 PY 1993 BP 521 EP 522 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BB04D UT WOS:A1993BB04D00047 ER PT B AU KURUCZ, RL AF KURUCZ, RL BE Dworetsky, MM Castelli, F Faraggiana, R TI A NEW OPACITY-SAMPLING MODEL ATMOSPHERE PROGRAM FOR ARBITRARY ABUNDANCES SO PECULIAR VERSUS NORMAL PHENOMENA IN A-TYPE AND RELATED STARS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 138th International Astronomical Union Colloquium on Peculiar Versus Normal Phenomena in A-Type and Related Stars CY JUL, 1992 CL TRIESTE, ITALY SP INT ASTRON UNION, EUROPEAN ASTRON SOC, NATL COUNCIL RES, UNIV TRIESTE, INTERUNIV REG CTR ASTROPHYS & COSMOL, UNIV TRIESTE, CONSORTIUM DEV RES PHYS INST, INTERDISCIPLINARY LAB NAT & HUMANIST SCI, INFORMATICA SIST ENTI LOCALI, INT SCH ADV STUDY, INT CTR THEORET PHYS, ENTE REG DIRITTO STUDIO C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 17 Z9 17 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-63-5 J9 ASTR SOC P PY 1993 VL 44 BP 87 EP 97 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94T UT WOS:A1993BZ94T00007 ER PT B AU VESSOT, RFC AF VESSOT, RFC BE TranThanhVan, J Damour, T Hinds, E Wilkerson, J TI SPACE EXPERIMENTS WITH HIGH-STABILITY CLOCKS SO PERSPECTIVES IN NEUTRINOS ATOMIC PHYSICS AND GRAVITATION SE MORIOND WORKSHOPS LA English DT Proceedings Paper CT XXVIIIth Rencontre De Moriond on Perspectives in Neutrinos Atomic Physics and Gravitation CY JAN 30-FEB 06, 1993 CL VILLARS OLLON, SWITZERLAND SP COMMISS EUROPEAN COMMUNITIES, CNRS, CEA C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-136-6 J9 MORIOND WOR PY 1993 BP 471 EP 489 PG 19 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BB19U UT WOS:A1993BB19U00057 ER PT J AU KURUCZ, RL AF KURUCZ, RL TI ATOMIC DATA FOR INTERPRETING STELLAR SPECTRA - ISOTOPIC AND HYPERFINE DATA SO PHYSICA SCRIPTA LA English DT Article ID SOLAR; LINE AB The quality of solar, stellar, and interstellar observations is now so high that we can see physical effects that have been assumed to be insignificant. In natural isotopic mixtures essentially all atomic lines are asymmetric because of isotopic and hyperfine components. In astrophysics the effects of isotopic components have been generally ignored in the case of Ti, Cr, Fe and Ni. Ignoring isotopic splitting introduces the following systematic errors: (1) the use of bisectors to determine velocity fields is incorrect; (2) Fourier analysis of line profiles to determine rotational, microturbulent, and macroturbulent velocities is incorrect; and (3) damping constants are overestimated. When the stronger components become saturated, the weak components are still on the linear part of the curve of growth. This introduces the additional systematic errors; (4) wavelengths of saturated lines are shifted; and (5) abundances determined from equivalent widths are wrong. In addition the Doppler width and Voigt profile of each isotope are significantly different. It is imperative that laboratory measurements be made to determine the isotopic splitting of every energy level of every stable isotope of every atom and ion as is now routinely done for actinides and for diatomic molecules. Hyperfine splitting should be measured as well for those isotopes with nuclear spin. Russia, the United States, and other countries should stockpile pure stable isotopes so they will be available for these measurements. Computer programs for analyzing spectra including the hyperfine and isotopic splitting already exist. We now need the laboratory data. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 18 TC 75 Z9 75 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 EI 1402-4896 J9 PHYS SCRIPTA JI Phys. Scr. PY 1993 VL T47 BP 110 EP 117 DI 10.1088/0031-8949/1993/T47/017 PG 8 WC Physics, Multidisciplinary SC Physics GA LQ507 UT WOS:A1993LQ50700019 ER PT S AU KIRBY, KP AF KIRBY, KP BE Andersen, T Fastrup, B Folkmann, F Knudsen, H Andersen, N TI ATMOSPHERIC PHYSICS, COLLISION PHYSICS AND GLOBAL CHANGE SO PHYSICS OF ELECTRONIC AND ATOMIC COLLISIONS: XVIII INTERNATIONAL CONFERENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 18th International Conference on The Physics of Electronic and Atomic Collisions (XVIII ICPEAC) CY JUL 21-27, 1993 CL CONCERT HALL, AARHUS, DENMARK SP DANISH SCI RES COUNCIL, DANISH ACCELERATOR COMM, COMMISS EUROPEAN COMMUNITIES, INT UNION PURE & APPL PHYS, THOMAS B THRIGES FOND, OTTO MONSTEDS FOND, KNUD HOJGAARDS FOND, CARLSBERGFONDET, JYSK TELEFON A S, UNIBANK, SCANDINAVIAN AIRLINES SYST, DANFYSIK, SCANDNORDAX AB, CABURN, MDC HO CONCERT HALL C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 9 Z9 9 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-290-X J9 AIP CONF PROC PY 1993 IS 295 BP 48 EP 58 PG 11 WC Physics, Atomic, Molecular & Chemical SC Physics GA BA16S UT WOS:A1993BA16S00003 ER PT B AU GINGERICH, O AF GINGERICH, O BE Linsky, JF Serio, S TI THE 19TH-CENTURY BIRTH OF ASTROPHYSICS SO PHYSICS OF SOLAR AND STELLAR CORONAE: G.S VAIANA MEMORIAL SYMPOSIUM SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT G S Vaiana Memorial Symposium on Physics of Solar and Stellar Coronae CY JUN 22-26, 1992 CL PALERMO, ITALY SP INT ASTRON UNION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2346-7 J9 ASTROPHYS SPACE SC L PY 1993 VL 184 BP 47 EP 58 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ63Z UT WOS:A1993BZ63Z00004 ER PT B AU GOLUB, L AF GOLUB, L BE Linsky, JF Serio, S TI NIXT HIGH-RESOLUTION OBSERVATIONS SO PHYSICS OF SOLAR AND STELLAR CORONAE: G.S VAIANA MEMORIAL SYMPOSIUM SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT G S Vaiana Memorial Symposium on Physics of Solar and Stellar Coronae CY JUN 22-26, 1992 CL PALERMO, ITALY SP INT ASTRON UNION DE SUN; CORONA; X-RAYS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2346-7 J9 ASTROPHYS SPACE SC L PY 1993 VL 184 BP 71 EP 82 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ63Z UT WOS:A1993BZ63Z00006 ER PT B AU FABBIANO, G AF FABBIANO, G BE Linsky, JF Serio, S TI CORONAL STELLAR EMISSION IN GALAXIES SO PHYSICS OF SOLAR AND STELLAR CORONAE: G.S VAIANA MEMORIAL SYMPOSIUM SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT G S Vaiana Memorial Symposium on Physics of Solar and Stellar Coronae CY JUN 22-26, 1992 CL PALERMO, ITALY SP INT ASTRON UNION DE GALAXIES; GALACTIC X-RAY EMISSION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2346-7 J9 ASTROPHYS SPACE SC L PY 1993 VL 184 BP 267 EP 273 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ63Z UT WOS:A1993BZ63Z00030 ER PT B AU HARNDEN, FR AF HARNDEN, FR BE Linsky, JF Serio, S TI X-RAY-EMISSION FROM THE PLEIADES SO PHYSICS OF SOLAR AND STELLAR CORONAE: G.S VAIANA MEMORIAL SYMPOSIUM SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT G S Vaiana Memorial Symposium on Physics of Solar and Stellar Coronae CY JUN 22-26, 1992 CL PALERMO, ITALY SP INT ASTRON UNION DE OPEN STAR CLUSTERS; CORONAE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2346-7 J9 ASTROPHYS SPACE SC L PY 1993 VL 184 BP 337 EP 343 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ63Z UT WOS:A1993BZ63Z00044 ER PT B AU FIELD, G DRAKE, S ROSNER, R DRAGO, FC PERES, G BYRNE, P LINSKY, J ULMSCHNEIDER, P REALE, F KURSTER, M MUTEL, R WEISS, N CATALANO, S MAGGIO, A PALLAVICINI, R KATSOVA, M MEWE, R AF FIELD, G DRAKE, S ROSNER, R DRAGO, FC PERES, G BYRNE, P LINSKY, J ULMSCHNEIDER, P REALE, F KURSTER, M MUTEL, R WEISS, N CATALANO, S MAGGIO, A PALLAVICINI, R KATSOVA, M MEWE, R BE Linsky, JF Serio, S TI DISCUSSION FOLLOWING PAPERS ON OTHER OBSERVATIONS SO PHYSICS OF SOLAR AND STELLAR CORONAE: G.S VAIANA MEMORIAL SYMPOSIUM SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT G S Vaiana Memorial Symposium on Physics of Solar and Stellar Coronae CY JUN 22-26, 1992 CL PALERMO, ITALY SP INT ASTRON UNION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Maggio, Antonio/P-5700-2015 OI Maggio, Antonio/0000-0001-5154-6108 NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2346-7 J9 ASTROPHYS SPACE SC L PY 1993 VL 184 BP 509 EP 511 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ63Z UT WOS:A1993BZ63Z00080 ER PT B AU GOLUB, L PRIEST, E MAGGIO, A SOMOV, B WEISS, N UCHIDA, Y CHIUDERI, C FIELD, G ULMSCHNEIDER, P SCHMITT, J LINSKY, J BYRNE, P ANTONUCCI, E ROSNER, R FOING, B TRUMPER, J TRUMPER, J MONTESINOS, B DRAKE, S MONTESINOS, B SCHMITT, J HALBERSTADT, G CHIUDERI, C HAMMER, R SOMOV, B DAHLBURG, R TSINGANOS, K AF GOLUB, L PRIEST, E MAGGIO, A SOMOV, B WEISS, N UCHIDA, Y CHIUDERI, C FIELD, G ULMSCHNEIDER, P SCHMITT, J LINSKY, J BYRNE, P ANTONUCCI, E ROSNER, R FOING, B TRUMPER, J TRUMPER, J MONTESINOS, B DRAKE, S MONTESINOS, B SCHMITT, J HALBERSTADT, G CHIUDERI, C HAMMER, R SOMOV, B DAHLBURG, R TSINGANOS, K BE Linsky, JF Serio, S TI DISCUSSION ON THEORETICAL DEVELOPMENTS SO PHYSICS OF SOLAR AND STELLAR CORONAE: G.S VAIANA MEMORIAL SYMPOSIUM SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT G S Vaiana Memorial Symposium on Physics of Solar and Stellar Coronae CY JUN 22-26, 1992 CL PALERMO, ITALY SP INT ASTRON UNION C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Maggio, Antonio/P-5700-2015 OI Maggio, Antonio/0000-0001-5154-6108 NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2346-7 J9 ASTROPHYS SPACE SC L PY 1993 VL 184 BP 633 EP 639 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ63Z UT WOS:A1993BZ63Z00099 ER PT J AU IVERSON, SJ BOWEN, WD BONESS, DJ OFTEDAL, OT AF IVERSON, SJ BOWEN, WD BONESS, DJ OFTEDAL, OT TI THE EFFECT OF MATERNAL SIZE AND MILK ENERGY OUTPUT ON PUP GROWTH IN GRAY SEALS (HALICHOERUS-GRYPUS) SO PHYSIOLOGICAL ZOOLOGY LA English DT Article ID SOUTHERN ELEPHANT SEALS; HOODED SEAL; PARENTAL INVESTMENT; CYSTOPHORA-CRISTATA; PHOCA-GROENLANDICA; POSTSUCKLING FAST; INTERNAL ORGANS; GRAY SEALS; HARP SEAL; ENERGETICS AB In phocid species in which females fast throughout lactation, maternal energy reserves at parturition must support lactation. Thus, differences in body size and energy stores may influence the magnitude of maternal energy transfer. We examined variation in milk energy transfer and its consequence for pup growth in grey seals over a wide range of maternal body sizes. Milk samples (n = 42) were collected from 28 females over the 16-d lactation period. Milk yields were measured in nine mother-pup pairs by deuterium oxide dilution. Milk fat and energy content increased dramatically over the first half of lactation. At mid- to late lactation milk composition averaged 71.1% dry matter, 59.8% fat, 9.2% protein, and 24.8 kJ/g (bomb calorimetry). Initial maternal mass (149-256 kg) and daily mass loss (3-9 kg/d) were correlated with daily milk output (1.3-4.1 kg/d). Milk energy output (29-92 MJ/d) in turn explained pup mass gain (0.8-2.8 kg/d, r2 = 0.997). Pups with greater energy intakes bad a greater ratio of fat to protein deposition and thus a greater efficiency of energy storage, increasing from 40% to 79%. Daily milk intake did not change over lactation, but growth rate was greater during the second half of lactation because milk energy intake was greater. Results of this study indicate that large females lose mass more rapidly, produce more milk, and wean larger, fatter pups than do small females. We conclude that differences in maternal mass and available energy stores may have substantial consequences for the pup and may account for much of the reported variation in pup growth both within and between populations of phocids such as the grey seal. C1 FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,DEPT FISHERIES & OCEANS,DIV MARINE FISH,DARTMOUTH B2Y 4A2,NS,CANADA. SMITHSONIAN INST,DEPT ZOOL RES,NATL ZOOL PK,WASHINGTON,DC 20008. RP IVERSON, SJ (reprint author), TECH UNIV NOVA SCOTIA,CANADIAN INST FISHERIES TECHNOL,1360 BARRINGTON ST,POB 1000,HALIFAX B3J 2X4,NS,CANADA. RI Bowen, William/D-2758-2012 NR 57 TC 138 Z9 138 U1 1 U2 21 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0031-935X J9 PHYSIOL ZOOL JI Physiol. Zool. PD JAN-FEB PY 1993 VL 66 IS 1 BP 61 EP 88 PG 28 WC Physiology; Zoology SC Physiology; Zoology GA KW416 UT WOS:A1993KW41600004 ER PT B AU WALSWORTH, RL MATTISON, EM VESSOT, RFC SILVERA, IF AF WALSWORTH, RL MATTISON, EM VESSOT, RFC SILVERA, IF GP IEEE TI RECENT INVESTIGATIONS WITH THE HARVARD-SMITHSONIAN CRYOGENIC HYDROGEN MASER SO PROCEEDINGS OF THE 1993 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM LA English DT Proceedings Paper CT 1993 IEEE International Frequency Control Symposium (the 47th Annual Symposium) CY JUN 02-04, 1993 CL SALT LAKE CITY, UT SP IEEE, ULTRASPM FERROELECT & FREQUENCY CONTROL SOC C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-0905-7 PY 1993 BP 129 EP 131 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA BZ86X UT WOS:A1993BZ86X00018 ER PT B AU TELL, L BUSH, M CITINO, S AF TELL, L BUSH, M CITINO, S BE DeNovo, R TI ANESTHESIA FOR NONDOMESTIC PATIENTS AND URBAN WILDLIFE SO PROCEEDINGS OF THE ELEVENTH ANNUAL VETERINARY MEDICAL FORUM LA English DT Proceedings Paper CT 11th Annual Veterinary Medical Forum CY 1993 CL WASHINGTON, DC SP AMER COLL VET INTERNAL MEDHILLS PET NUTR INC, HILLS PET NUTR INC, MERCK RES LABS, WALTHAM, SMITHKLINE BEECHAM ANIM HLTH, UPJOHN, CIBA GEIGY, VET RES ASSOC, RALSTON PURINA C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER COLL VETERINARY INTERNAL MEDICINE PI LAKEWOOD PA 7175 W JEFFERSON AVE STE 2125, LAKEWOOD, CO 80235 PY 1993 BP 491 EP 493 PG 3 WC Veterinary Sciences SC Veterinary Sciences GA BA40A UT WOS:A1993BA40A00128 ER PT B AU CITINO, SB AF CITINO, SB BE DeNovo, R TI VETERINARY CARE OF TROPICAL FISH - TAKING THE DIAGNOSTIC-APPROACH SO PROCEEDINGS OF THE ELEVENTH ANNUAL VETERINARY MEDICAL FORUM LA English DT Proceedings Paper CT 11th Annual Veterinary Medical Forum CY 1993 CL WASHINGTON, DC SP AMER COLL VET INTERNAL MEDHILLS PET NUTR INC, HILLS PET NUTR INC, MERCK RES LABS, WALTHAM, SMITHKLINE BEECHAM ANIM HLTH, UPJOHN, CIBA GEIGY, VET RES ASSOC, RALSTON PURINA C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER COLL VETERINARY INTERNAL MEDICINE PI LAKEWOOD PA 7175 W JEFFERSON AVE STE 2125, LAKEWOOD, CO 80235 PY 1993 BP 494 EP 496 PG 3 WC Veterinary Sciences SC Veterinary Sciences GA BA40A UT WOS:A1993BA40A00129 ER PT J AU MATHIS, WN AF MATHIS, WN TI A REVISION OF THE SHORE-FLY GENERA HOSTIS-CRESSON AND PARATISSA-COQUILLETT (DIPTERA, EPHYDRIDAE) SO PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON LA English DT Article DE DIPTERA; EPHYDRIDAE; SHORE FLIES; HOSTIS; PARATISSA; PHYLOGENY AB The shore-fly genera Hostis Cresson and Paratissa Coquillett are revised. These genera, now placed in the tribe Psilopini, are sister groups to each other. Hostis, which is monotypic, occurs on maritime beaches of the Pacific and Indian oceans. Acanthonotiphila scotti Seguy is a junior synonym of Hostis guamensis Cresson. Paratissa, comprising four species, includes P. neotropica, which is newly described (type locality: Belize. Stann Creek District: Carrie Bow Cay); also, P. coriacea (Lamb), P. semilutea (Loew), and P. pollinosa (Williston). The latter three species had been considered to be conspecific but are here shown to be valid species. RP MATHIS, WN (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,NHB 169,WASHINGTON,DC 20560, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ENTOMOL SOC WASHINGTON PI WASHINGTON PA SMITHSONIAN INSTITUTION DEPT ENTOMOLOGY, WASHINGTON, DC 20560 SN 0013-8797 J9 P ENTOMOL SOC WASH JI Proc. Entomol. Soc. Wash. PD JAN PY 1993 VL 95 IS 1 BP 21 EP 47 PG 27 WC Entomology SC Entomology GA KJ003 UT WOS:A1993KJ00300004 ER PT B AU MONTALI, RJ CITINO, SB AF MONTALI, RJ CITINO, SB BE Ryder, OA TI PATHOLOGICAL FINDINGS IN CAPTIVE RHINOCEROSES SO RHINOCEROS BIOLOGY AND CONSERVATION: PROCEEDINGS OF AN INTERNATIONAL CONFERENCE LA English DT Proceedings Paper CT International Conference on Rhinoceros Biology and Conservation CY MAY 09-11, 1991 CL SAN DIEGO, CA SP ZOOL SOC SAN DIEGO C1 SMITHSONIAN INST,DEPT PATHOL,WASHINGTON,DC 20008. NR 0 TC 5 Z9 5 U1 0 U2 1 PU ZOOLOGICAL SOCIETY SAN DIEGO PI SAN DIEGO PA ATTN: OLIVER RYDER PO BOX 551, SAN DIEGO, CA 92112-0551 PY 1993 BP 346 EP 349 PG 4 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA BA74Y UT WOS:A1993BA74Y00041 ER PT J AU LINARES, OF AF LINARES, OF TI TERMINAL SIGNS - COMPUTERS AND SOCIAL-CHANGE IN AFRICA - JULESROSETTE,B SO SEMIOTICA LA English DT Book Review RP LINARES, OF (reprint author), SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU WALTER DE GRUYTER & CO PI BERLIN PA GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY SN 0037-1998 J9 SEMIOTICA JI Semiotica PY 1993 VL 93 IS 3-4 BP 341 EP 346 PG 6 WC Humanities, Multidisciplinary; Social Sciences, Interdisciplinary SC Arts & Humanities - Other Topics; Social Sciences - Other Topics GA KY627 UT WOS:A1993KY62700011 ER PT J AU SAKAGAMI, SF ROUBIK, DW ZUCCHI, R AF SAKAGAMI, SF ROUBIK, DW ZUCCHI, R TI ETHOLOGY OF THE ROBBER STINGLESS BEE, LESTRIMELITTA-LIMAO (HYMENOPTERA, APIDAE) SO SOCIOBIOLOGY LA English DT Article ID NEST; MELIPONINAE; HONEYBEES; DEFENSE AB Over 90 raids by colonies of robber stingless bees Lestrimelitta limao were observed in Brazil and Panama, in most cases involving a known robber colony or observation hive. Potential hosts included at least 39 native stingless bee species and Africanized Apis mellifera. In total, 17 species hosted raids. We report here studies made of the robbing process focusing on both host and parasite. Robbing colonies removed brood cell provisions, some honey, wax and resin, and pollen from meliponine nests, seldom exterminating colonies. Queens were not attacked, while provisions in brood cells were totally removed; honey was pillaged from honeybees and caused colony absconding. Preferred hosts had long, cerumen entrance tubes, moderate to large colony size, high quality brood cell provisions and were no larger than L. limao. Scaptotrigona and Nannotrigona resisted L. limao relatively strongly and were frequent hosts but always retreated if robbers successfully invaded. Adult bee mortality during raids usually was slight. Masses of immobile host adults remained near pupae and prepupae, left untouched by robbers. Host bees suddenly resumed activity and nest defense near the termination of raids, as robbers gradually withdrew. Guarding L. limao were unaggressive at their own nest, but during raids formed a ring around the host nest entrance and defended it from all other insects. Guard-ring robbers occasionally elevated the abdomen and exposed a whitish intersegmental region between hind terga while fanning the wings. Except at the start or end of raids, when host and robber fought, there was no discernible release of citral odor from robber mandibular glands. No robber odor was noted inside nests through most of the raid. When raids were artificially interrupted by release of L. limao mandibular gland substances, robbers quickly departed and host bees arrived, killing robbers that remained. Repeating this experiment did not always produce the same result. Complex timing in the release of host and robber chemicals likely control the robbing process. Host nests were occupied by Lestrimelitta for up to 5 days but usually only one day for less than 4 hrs; multiple colonies were also raided simultaneously. Raids occurred more frequently in wet season when flower abundance and colony food stores were low; thus raid frequency was inversely related to potential harvest per raid. Mass raids incorporated up to 600 bees while mild raids for nest material were made by only a few bees. Large groups arrived at host nests following lone scouts and small groups. Throughout a raid, workers flew in an ellipse at the L. limao nest entrance. Raiding bees were guards, collectors of building material, or food collectors, appearing not to specialize according to age. C1 HOKKAIDO UNIV,INST LOW TEMP,SAPPORO,HOKKAIDO 060,JAPAN. UNIV SAO PAULO,FAC PHILOSOPHY SCI & LETTERS,BR-14040 RIBEIRAO PRE,BRAZIL. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 52 TC 36 Z9 39 U1 0 U2 11 PU CALIF STATE UNIV PI CHICO PA DEPT BIOL SCI, CHICO, CA 95929 SN 0361-6525 J9 SOCIOBIOLOGY JI Sociobiology PY 1993 VL 21 IS 2 BP 237 EP 277 PG 41 WC Entomology SC Entomology GA KR726 UT WOS:A1993KR72600007 ER PT S AU FABBIANO, G AF FABBIANO, G BE Trumper, J Cesarsky, C Palumbo, GGC Bignami, GF TI X-RAY-PROPERTIES OF NORMAL GALAXIES SO SPACE ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E2, and the Topical Meeting of the COSPAR Interdisciplinary Scientific Commission E of the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INT ASTRON UNION, INT ACAD ASTRONAUT ID SPIRAL GALAXIES; STATISTICAL-ANALYSIS; SPECTRAL PROPERTIES; EMISSION; SAMPLE; M82 RP FABBIANO, G (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 36 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042353-1 J9 ADV SPACE RES PY 1993 VL 13 IS 12 BP 161 EP 169 DI 10.1016/0273-1177(93)90108-N PG 9 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BZ58Q UT WOS:A1993BZ58Q00018 ER PT S AU MELNICK, GJ AF MELNICK, GJ BE Trumper, J Cesarsky, C Palumbo, GGC Bignami, GF TI SUBMILLIMETER SPECTROSCOPY FROM SPACE - MISSIONS PLANNED BETWEEN 1995 AND 2005 SO SPACE ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E2, and the Topical Meeting of the COSPAR Interdisciplinary Scientific Commission E of the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INT ASTRON UNION, INT ACAD ASTRONAUT ID MOLECULAR CLOUDS AB The submillimeter wavelength range (100 mu m less than or equal to lambda less than or equal to 1 mm) is exceptionally rich in atomic and molecular transitions that provide direct measures of the chemical composition, temperature, density, and cooling of the interstellar medium. In part, this is due to the fact that the most abundant oxygen- and carbon-bearing species as well as the most common hydrides have their lowest lying transitions within this wavelength region. However, because of the great abundance of many of these same species in our own atmosphere (e.g., H2O and O-2), terrestrial absorption at submillimeter wavelengths is strong, rendering much of the sky inaccessible to ground- and even airborne observing platforms. In recognition of-the scientific importance of the submillimeter range to astronomy and the limitations placed on its pursuit by the atmosphere, both NASA and ESA have embarked on ambitious programs to explore these wavelengths from space. RP MELNICK, GJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 6 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042353-1 J9 ADV SPACE RES PY 1993 VL 13 IS 12 BP 535 EP 544 DI 10.1016/0273-1177(93)90162-5 PG 10 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BZ58Q UT WOS:A1993BZ58Q00071 ER PT S AU GRINDLAY, JE AF GRINDLAY, JE BE Trumper, J Cesarsky, C Palumbo, GGC Bignami, GF TI OPTICAL, X-RAY AND GAMMA-RAY OBSERVATIONS OF COMPACT OBJECTS IN GLOBULAR-CLUSTERS SO SPACE ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E2, and the Topical Meeting of the COSPAR Interdisciplinary Scientific Commission E of the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INT ASTRON UNION, INT ACAD ASTRONAUT ID CATACLYSMIC VARIABLES; MILLISECOND PULSAR; TIDAL CAPTURE; MASS; COLLAPSE; EMISSION AB In the past three years, a new era of study of globular clusters has begun with multiwavelength observations from the current generation of astronomical telescopes in space. We review the recent results obtained from our studies of compact binaries and x-ray sources in globulars with ROSAT and HST as well as our balloon-borne hard x-ray telescope EXITE and ground-based observations (CTIO). With ROSAT, we have obtained the most sensitive high resolution soft x-ray images of clusters which show multiple low luminosity sources in cluster cores that are Likely indicative of the long-sought population of cataclysmic variables (CVs). We have obtained deep Ha images of two clusters with HST and found CV candidates for 3 of the ROSAT sources in the core of NGC 6397. New CTIO imaging and spectroscopy of two 'dim source' fields in omega-Cen are also described. With EXITE we carried out the first hard x-ray imaging observations of the cluster 47 Tuc; such studies can ultimately limit the populations of millisecond pulsars and pulsar emission mechanisms. A long ROSAT exposure on 47 Tuc also shows probable cluster diffuse emission, possibly due to hot gas from ablating millisecond pulsars. Multiwavelength studies of globular clusters may provide new constraints on problems as diverse as the origin of CVs and LMXBs and the origin of hot gas in globulars. RP GRINDLAY, JE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 56 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042353-1 J9 ADV SPACE RES PY 1993 VL 13 IS 12 BP 597 EP 609 DI 10.1016/0273-1177(93)90169-C PG 13 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BZ58Q UT WOS:A1993BZ58Q00077 ER PT B AU REASENBERG, RD BABCOCK, RW NOECKER, MC PHILLIPS, JD AF REASENBERG, RD BABCOCK, RW NOECKER, MC PHILLIPS, JD BE Reasenberg, RD TI POINTS - THE 1ST SMALL STEP SO SPACEBORNE INTERFEROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Spaceborne Interferometry CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1183-3 J9 P SOC PHOTO-OPT INS PY 1993 VL 1947 BP 12 EP 29 DI 10.1117/12.155745 PG 18 WC Engineering, Aerospace; Optics SC Engineering; Optics GA BZ81S UT WOS:A1993BZ81S00002 ER PT B AU NOECKER, MC PHILLIPS, JD BABCOCK, RW REASENBERG, RD AF NOECKER, MC PHILLIPS, JD BABCOCK, RW REASENBERG, RD BE Reasenberg, RD TI INTERNAL LASER METROLOGY FOR POINTS SO SPACEBORNE INTERFEROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Spaceborne Interferometry CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 10 Z9 10 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1183-3 J9 P SOC PHOTO-OPT INS PY 1993 VL 1947 BP 174 EP 187 DI 10.1117/12.155748 PG 14 WC Engineering, Aerospace; Optics SC Engineering; Optics GA BZ81S UT WOS:A1993BZ81S00015 ER PT B AU NOECKER, MC MURISON, MA REASENBERG, RD AF NOECKER, MC MURISON, MA REASENBERG, RD BE Reasenberg, RD TI OPTIC-MISALIGNMENT TOLERANCES FOR THE POINTS INTERFEROMETERS SO SPACEBORNE INTERFEROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Spaceborne Interferometry CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1183-3 J9 P SOC PHOTO-OPT INS PY 1993 VL 1947 BP 218 EP 231 DI 10.1117/12.155749 PG 14 WC Engineering, Aerospace; Optics SC Engineering; Optics GA BZ81S UT WOS:A1993BZ81S00019 ER PT B AU REASENBERG, RD BABCOCK, RW PHILLIPS, JD JOHNSTON, KJ SIMON, RS AF REASENBERG, RD BABCOCK, RW PHILLIPS, JD JOHNSTON, KJ SIMON, RS BE Reasenberg, RD TI NEWCOMB, A POINTS PRECURSOR MISSION WITH SCIENTIFIC CAPACITY SO SPACEBORNE INTERFEROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Spaceborne Interferometry CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1183-3 J9 P SOC PHOTO-OPT INS PY 1993 VL 1947 BP 272 EP 281 DI 10.1117/12.155750 PG 10 WC Engineering, Aerospace; Optics SC Engineering; Optics GA BZ81S UT WOS:A1993BZ81S00023 ER PT B AU ROSSI, P DALPINO, EMD BODO, G FERRARI, A MASSAGLIA, S AF ROSSI, P DALPINO, EMD BODO, G FERRARI, A MASSAGLIA, S BE Errico, L Vittone, AA TI NONLINEAR EVOLUTION OF RADIATIVE UNSTABLE MODES IN EXTRAGALACTIC JETS SO STELLAR JETS AND BIPOLAR OUTFLOWS SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT 6th International Workshop of the Astronomical Observatory of Capodimonte (OAC 6) CY SEP 18-21, 1991 CL CAPRI, ITALY SP ASTRON OBSERV CAPODIMONTE C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2521-4 J9 ASTROPHYS SPACE SC L PY 1993 VL 186 BP 403 EP 404 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ61M UT WOS:A1993BZ61M00075 ER PT B AU DAVIES, MB BENZ, W HILLS, JG AF DAVIES, MB BENZ, W HILLS, JG BE Djorgovski, SG Meylan, G TI ENCOUNTERS BETWEEN BINARIES AND NEUTRON-STARS IN GLOBULAR-CLUSTERS SO STRUCTURE AND DYNAMICS OF GLOBULAR CLUSTERS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Dynamics of Globular Clusters CY JUL 15-17, 1992 CL UNIV CALIF BERKELEY, BERKELEY, CA HO UNIV CALIF BERKELEY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-69-4 J9 ASTR SOC P PY 1993 VL 50 BP 185 EP 186 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA17E UT WOS:A1993BA17E00026 ER PT B AU GRINDLAY, JE AF GRINDLAY, JE BE Djorgovski, SG Meylan, G TI EARLY STUDIES OF GLOBULAR-CLUSTERS WITH ROSAT SO STRUCTURE AND DYNAMICS OF GLOBULAR CLUSTERS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Dynamics of Globular Clusters CY JUL 15-17, 1992 CL UNIV CALIF BERKELEY, BERKELEY, CA HO UNIV CALIF BERKELEY C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 13 Z9 13 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-69-4 J9 ASTR SOC P PY 1993 VL 50 BP 285 EP 296 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA17E UT WOS:A1993BA17E00041 ER PT J AU SIMPSON, MS AF SIMPSON, MS TI THE MAKING OF MANUSCRIPTS AND THE WORKINGS OF THE KITAB-KHANA IN SAFAVID IRAN + MIDDLE-EASTERN ARTISTS WORKSHOP SO STUDIES IN THE HISTORY OF ART LA English DT Article; Proceedings Paper CT SYMP OF THE ARTISTS WORKSHOP CY MAR 10-11, 1989 CL WASHINGTON, DC SP CTR ADV STUDY VISUAL ARTS, JOHNS HOPKINS UNIV, DEPT HIST ART RP SIMPSON, MS (reprint author), SMITHSONIAN INST,ARTHUR M SACKLER GALLERY,WASHINGTON,DC 20560, USA. NR 80 TC 1 Z9 1 U1 0 U2 1 PU NATL GALLERY ART PI WASHINGTON PA 6TH ST AND CONSTITUTION AVE, WASHINGTON, DC 20565 SN 0091-7338 J9 STUD HIST ART JI Stud. Hist. Art PY 1993 VL 38 BP 104 EP 121 PG 18 WC Art SC Art GA LD904 UT WOS:A1993LD90400007 ER PT B AU REID, MJ MENTEN, KM AF REID, MJ MENTEN, KM BE Davis, RJ Booth, RS TI PHOTOSPHERIC EMISSION FROM RED GIANT STARS AT RADIO FREQUENCIES SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 10 EP 12 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00003 ER PT B AU CURIEL, S RODRIGUEZ, LF MORAN, JM CANTO, J AF CURIEL, S RODRIGUEZ, LF MORAN, JM CANTO, J BE Davis, RJ Booth, RS TI THE SERPENS RADIO JET SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 20 EP 21 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00007 ER PT B AU MORAN, JM AF MORAN, JM BE Davis, RJ Booth, RS TI DISTANCE MEASUREMENTS THROUGH OBSERVATIONS OF MASERS SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 4 Z9 4 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 62 EP 67 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00022 ER PT B AU BLOEMHOF, EE REID, MJ MORAN, JM AF BLOEMHOF, EE REID, MJ MORAN, JM BE Davis, RJ Booth, RS TI TIME VARIATIONS IN THE FLUX DENSITY OF SPATIALLY RESOLVED INTERSTELLAR OH MASERS SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 76 EP 77 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00025 ER PT B AU MENTEN, KM REID, MJ PRATAP, P MORAN, JM WILSON, TL AF MENTEN, KM REID, MJ PRATAP, P MORAN, JM WILSON, TL BE Davis, RJ Booth, RS TI VLBI OBSERVATIONS OF METHANOL MASERS AT 6.7 GHZ SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 78 EP 80 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00026 ER PT B AU KOCHANEK, CS AF KOCHANEK, CS BE Davis, RJ Booth, RS TI A (VERY) FEW POINTS ON THE THEORY OF GRAVITATIONAL LENSES SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 117 EP 122 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00039 ER PT B AU CAWTHORNE, TV WARDLE, JFC ROBERTS, DH GABUZDA, DC AF CAWTHORNE, TV WARDLE, JFC ROBERTS, DH GABUZDA, DC BE Davis, RJ Booth, RS TI THE RESULTS OF A STUDY OF THE MILLIARCSECOND SCALE LINEAR POLARIZATION PROPERTIES OF EXTRAGALACTIC RADIO SOURCES SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 209 EP 210 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00070 ER PT B AU WORRALL, DM BIRKINSHAW, M GWINN, CR AF WORRALL, DM BIRKINSHAW, M GWINN, CR BE Davis, RJ Booth, RS TI NEW X-RAY OBSERVATIONS OF EXTRAGALACTIC VLBI SOURCES SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 303 EP 305 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00107 ER PT B AU DALPINO, EMD OPHER, R AF DALPINO, EMD OPHER, R BE Davis, RJ Booth, RS TI CAN THE FILAMENTS OF THE RADIO SOURCES BE REALLY DUE TO SYNCHROTRON THERMAL INSTABILITIES SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 369 EP 370 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00127 ER PT B AU DALPINO, EM BENZ, W AF DALPINO, EM BENZ, W BE Davis, RJ Booth, RS TI 3-D SIMULATIONS OF CONTINUOUS AND RECURRENT COOLING JETS SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI de Gouveia Dal Pino, Elisabete/H-9560-2013 OI de Gouveia Dal Pino, Elisabete/0000-0001-8058-4752 NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 375 EP 377 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00130 ER PT B AU ELOSEGUI, P MARCAIDE, JM ALBERDI, A RATNER, MI SHAPIRO, II QUIRRENBACH, A WITZEL, A MANTOVANI, F RIUS, A AF ELOSEGUI, P MARCAIDE, JM ALBERDI, A RATNER, MI SHAPIRO, II QUIRRENBACH, A WITZEL, A MANTOVANI, F RIUS, A BE Davis, RJ Booth, RS TI VLBI PHASE-REFERENCING AT 5 degrees SEPARATION SO SUB-ARCSECOND RADIO ASTRONOMY LA English DT Proceedings Paper CT Nuffield-Radio-Astronomy-Laboratories Conference - Sub-arcsecond Radio Astronomy CY JUL 20-24, 1992 CL UNIV MANCHESTER, MANCHESTER, ENGLAND SP NUFFIELD RADIO ASTRON LABS HO UNIV MANCHESTER C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Antonio, Rius/A-4873-2012 OI Antonio, Rius/0000-0002-5947-2649 NR 0 TC 2 Z9 2 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-43472-6 PY 1993 BP 412 EP 414 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC51K UT WOS:A1993BC51K00140 ER PT J AU ABUASAB, MS CANTINO, PD AF ABUASAB, MS CANTINO, PD TI PHYLOGENETIC IMPLICATIONS OF POLLEN MORPHOLOGY IN TRIBE AJUGEAE (LABIATAE) SO SYSTEMATIC BOTANY LA English DT Article ID VERBENACEAE AB A palynological survey of tribe Ajugeae (Labiatae) reveals an exceptional amount of variation in an otherwise rather stenopalynous family. Five pollen types are distinguished based on differences in colpal structure (operculate vs. inoperculate), supratectal sculpturing, and the structure of the columellate stratum. Only one of these pollen types occurs elsewhere in the Labiatae, but four of them can be found in the Verbenaceae. Particularly close resemblances in pollen morphology were noted among the members of the following sets of taxa (in Ajugeae unless otherwise noted: SC, Scutellarieae; VE, Verbenaceae): Amethystea, Rubiteucris, Schnabelia, Tetraclea, Trichostema, and many Verbenaceae (mostly Clerodendreae); Kinostemon, Teucrium, Teucridium (VE), Spartothamnella (VE), Oncinocalyx (VE), and Monochilus (VE); Holocheila, Renschia, Tinnea, and Scutellaria (SC). The distribution of derived pollen features (hypothesized to be synapomorphies) suggests that tribe Ajugeae and the family Labiatae are polyphyletic. The segregation of Rubiteucris and Holocheila from Teucrium is supported by pollen morphology, but Kinostemon should be retained within Teucrium. C1 OHIO UNIV,DEPT ENVIRONM & PLANT BIOL,ATHENS,OH 45701. SMITHSONIAN INST,DEPT BOT,WASHINGTON,DC 20560. NR 49 TC 29 Z9 29 U1 1 U2 5 PU AMER SOC PLANT TAXONOMISTS PI BRONX PA NEW YORK BOTANICAL GARDEN, BRONX, NY 10458-5126 SN 0363-6445 J9 SYST BOT JI Syst. Bot. PD JAN-MAR PY 1993 VL 18 IS 1 BP 100 EP 122 DI 10.2307/2419791 PG 23 WC Plant Sciences; Evolutionary Biology SC Plant Sciences; Evolutionary Biology GA KH850 UT WOS:A1993KH85000009 ER PT J AU WASHBURN, WE AF WASHBURN, WE TI THE SKULKING WAY OF WAR - TECHNOLOGY AND TACTICS AMONG THE NEW-ENGLAND INDIANS - MALONE,PM SO TECHNOLOGY AND CULTURE LA English DT Book Review RP WASHBURN, WE (reprint author), SMITHSONIAN INST,AMER STUDIES PROGRAM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JAN PY 1993 VL 34 IS 1 BP 147 EP 149 DI 10.2307/3106467 PG 3 WC History & Philosophy Of Science SC History & Philosophy of Science GA KP961 UT WOS:A1993KP96100015 ER PT S AU WEEKES, TC AF WEEKES, TC BE Akerlof, CW Srednicki, MA TI GAMMA-RAY ASTRONOMY ABOVE 100 GEV SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP WEEKES, TC (reprint author), HARVARD UNIV,SMITHSONIAN CTR ASTROPHYS,WHIPPLE OBSERV,POB 97,AMADO,AZ 85645, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 240 EP 249 DI 10.1111/j.1749-6632.1993.tb43900.x PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00020 PM 26469425 ER PT B AU FAUST, MA AF FAUST, MA BE Smayda, TJ Shimizu, Y TI ALTERNATE ASEXUAL REPRODUCTION OF PROROCENTRUM-LIMA IN CULTURE SO TOXIC PHYTOPLANKTON BLOOMS IN THE SEA SE DEVELOPMENTS IN MARINE BIOLOGY LA English DT Proceedings Paper CT 5TH INTERNATIONAL CONF ON TOXIC MARINE PHYTOPLANKTON CY OCT 28-NOV 01, 1991 CL UNIV RHODE ISLAND, GRAD SCH OCEANOG, NEWPORT, RI SP UNESCO, INTERGOVT OCEANOG COMMISS, SCI COMM OCEANIC RES, US EPA, OFF WETLANDS OCEAN & WATERSHEDS, US EPA, GLOBAL CHANGE RES PROGRAM, US EPA, ENVIRONM RES LAB NARRAGANSETT, NOAA, COASTAL OCEAN PROGRAM, NOAA, NATL SEA GRANT COLL PROGRAM, RHODE ISLAND SEA GRANT COLL PROGRAM, UN ENVIRONM PROGRAMME, US FDA HO UNIV RHODE ISLAND, GRAD SCH OCEANOG RP FAUST, MA (reprint author), SMITHSONIAN INST,DEPT BOT,4201 SILVER HILL RD,SUITLAND,MD 20746, USA. NR 0 TC 13 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL B V PI AMSTERDAM PA AMSTERDAM BN 0-444-89719-4 J9 DEV MAR BIO PY 1993 VL 3 BP 115 EP 120 PG 6 WC Plant Sciences; Marine & Freshwater Biology; Oceanography; Toxicology SC Plant Sciences; Marine & Freshwater Biology; Oceanography; Toxicology GA BY50D UT WOS:A1993BY50D00016 ER PT B AU FAUST, MA AF FAUST, MA BE Smayda, TJ Shimizu, Y TI SEXUALITY IN A TOXIC DINOFLAGELLATE, PROROCENTRUM-LIMA SO TOXIC PHYTOPLANKTON BLOOMS IN THE SEA SE DEVELOPMENTS IN MARINE BIOLOGY LA English DT Proceedings Paper CT 5TH INTERNATIONAL CONF ON TOXIC MARINE PHYTOPLANKTON CY OCT 28-NOV 01, 1991 CL UNIV RHODE ISLAND, GRAD SCH OCEANOG, NEWPORT, RI SP UNESCO, INTERGOVT OCEANOG COMMISS, SCI COMM OCEANIC RES, US EPA, OFF WETLANDS OCEAN & WATERSHEDS, US EPA, GLOBAL CHANGE RES PROGRAM, US EPA, ENVIRONM RES LAB NARRAGANSETT, NOAA, COASTAL OCEAN PROGRAM, NOAA, NATL SEA GRANT COLL PROGRAM, RHODE ISLAND SEA GRANT COLL PROGRAM, UN ENVIRONM PROGRAMME, US FDA HO UNIV RHODE ISLAND, GRAD SCH OCEANOG RP FAUST, MA (reprint author), SMITHSONIAN INST,DEPT BOT,4201 SILVER HILL RD,SUITLAND,MD 20746, USA. NR 0 TC 15 Z9 16 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL B V PI AMSTERDAM PA AMSTERDAM BN 0-444-89719-4 J9 DEV MAR BIO PY 1993 VL 3 BP 121 EP 126 PG 6 WC Plant Sciences; Marine & Freshwater Biology; Oceanography; Toxicology SC Plant Sciences; Marine & Freshwater Biology; Oceanography; Toxicology GA BY50D UT WOS:A1993BY50D00017 ER PT B AU COOKE, R PIPERNO, D AF COOKE, R PIPERNO, D BE Hladik, CM Hladik, A Linares, OF Pagezy, H Semple, A Hadley, M TI NATIVE-AMERICAN ADAPTATIONS TO THE TROPICAL FORESTS OF CENTRAL AND SOUTH-AMERICA, BEFORE THE EUROPEAN COLONIZATION SO TROPICAL FORESTS, PEOPLE AND FOOD: BIOCULTURAL INTERACTIONS AND APPLICATIONS TO DEVELOPMENT SE MAN AND THE BIOSPHERE SERIES LA English DT Proceedings Paper CT International Scientific Symposium on Food and Nutrition in the Tropical Forests: Biocultural Interactions and Applications to Development CY SEP 10-13, 1991 CL UNESCO, PARIS, FRANCE SP UNESCO, CNRS HO UNESCO C1 SMITHSONIAN TROP RES INST,PANAMA CITY,PANAMA. NR 0 TC 3 Z9 3 U1 0 U2 1 PU PARTHENON PUBLISHING GROUP LTD PI LANCASTER PA CASTERTON HALL, CARNFORTH, LANCASTER, ENGLAND LA6 2LA BN 1-85070-380-9 J9 MAN BIOSPH PY 1993 VL 13 BP 25 EP 36 PG 12 WC Agronomy; Anthropology; Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics SC Agriculture; Anthropology; Environmental Sciences & Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics GA BA05J UT WOS:A1993BA05J00003 ER PT B AU LINARES, OF PAGEZY, H GRENAND, P AF LINARES, OF PAGEZY, H GRENAND, P BE Hladik, CM Hladik, A Linares, OF Pagezy, H Semple, A Hadley, M TI FEEDING STRATEGIES IN RELATION TO ENVIRONMENTAL VARIATION - BACKGROUND SO TROPICAL FORESTS, PEOPLE AND FOOD: BIOCULTURAL INTERACTIONS AND APPLICATIONS TO DEVELOPMENT SE MAN AND THE BIOSPHERE SERIES LA English DT Proceedings Paper CT International Scientific Symposium on Food and Nutrition in the Tropical Forests: Biocultural Interactions and Applications to Development CY SEP 10-13, 1991 CL UNESCO, PARIS, FRANCE SP UNESCO, CNRS HO UNESCO C1 SMITHSONIAN TROP RES INST,PANAMA CITY,PANAMA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PARTHENON PUBLISHING GROUP LTD PI LANCASTER PA CASTERTON HALL, CARNFORTH, LANCASTER, ENGLAND LA6 2LA BN 1-85070-380-9 J9 MAN BIOSPH PY 1993 VL 13 BP 405 EP 410 PG 6 WC Agronomy; Anthropology; Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics SC Agriculture; Anthropology; Environmental Sciences & Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics GA BA05J UT WOS:A1993BA05J00033 ER PT B AU LINARES, OF AF LINARES, OF BE Hladik, CM Hladik, A Linares, OF Pagezy, H Semple, A Hadley, M TI PALM OIL VERSUS PALM WINE - SYMBOLIC AND ECONOMIC DIMENSIONS SO TROPICAL FORESTS, PEOPLE AND FOOD: BIOCULTURAL INTERACTIONS AND APPLICATIONS TO DEVELOPMENT SE MAN AND THE BIOSPHERE SERIES LA English DT Proceedings Paper CT International Scientific Symposium on Food and Nutrition in the Tropical Forests: Biocultural Interactions and Applications to Development CY SEP 10-13, 1991 CL UNESCO, PARIS, FRANCE SP UNESCO, CNRS HO UNESCO C1 SMITHSONIAN TROP RES INST,PANAMA CITY,PANAMA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU PARTHENON PUBLISHING GROUP LTD PI LANCASTER PA CASTERTON HALL, CARNFORTH, LANCASTER, ENGLAND LA6 2LA BN 1-85070-380-9 J9 MAN BIOSPH PY 1993 VL 13 BP 595 EP 606 PG 12 WC Agronomy; Anthropology; Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics SC Agriculture; Anthropology; Environmental Sciences & Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics GA BA05J UT WOS:A1993BA05J00050 ER PT B AU LEIGH, EG AF LEIGH, EG BE Hladik, CM Hladik, A Linares, OF Pagezy, H Semple, A Hadley, M TI EPILOGUE - COMMENTS ON THE PARIS SYMPOSIUM BY A CONCERNED BIOLOGIST SO TROPICAL FORESTS, PEOPLE AND FOOD: BIOCULTURAL INTERACTIONS AND APPLICATIONS TO DEVELOPMENT SE MAN AND THE BIOSPHERE SERIES LA English DT Proceedings Paper CT International Scientific Symposium on Food and Nutrition in the Tropical Forests: Biocultural Interactions and Applications to Development CY SEP 10-13, 1991 CL UNESCO, PARIS, FRANCE SP UNESCO, CNRS HO UNESCO C1 SMITHSONIAN TROP RES INST,PANAMA CITY,PANAMA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PARTHENON PUBLISHING GROUP LTD PI LANCASTER PA CASTERTON HALL, CARNFORTH, LANCASTER, ENGLAND LA6 2LA BN 1-85070-380-9 J9 MAN BIOSPH PY 1993 VL 13 BP 829 EP 838 PG 10 WC Agronomy; Anthropology; Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics SC Agriculture; Anthropology; Environmental Sciences & Ecology; Food Science & Technology; Forestry; Nutrition & Dietetics GA BA05J UT WOS:A1993BA05J00074 ER PT J AU LEADLEY, PW DRAKE, BG AF LEADLEY, PW DRAKE, BG TI OPEN TOP CHAMBERS FOR EXPOSING PLANT CANOPIES TO ELEVATED CO2 CONCENTRATION AND FOR MEASURING NET GAS-EXCHANGE SO VEGETATIO LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON CO2 AND BIOSPHERE CY NOV 15-19, 1991 CL WAGENINGEN, NETHERLANDS SP NETHERLANDS ORG SCI RES, CO2 COMMISS, ROYAL NETHERLANDS ACAD ARTS OF SCI, MINIST HOUSING PHYS PLANNING & ENVIRONM NETHERLANDS, VRIJE UNIV AMSTERDAM, DEPT ECOL & ECOTOXICOL DE OPEN TOP CHAMBER; GAS EXCHANGE; PHOTOSYNTHESIS; ELEVATED CO2 ID ATMOSPHERIC CO2; FIELD CHAMBERS; CARBON-DIOXIDE; AIR-POLLUTION; ESTUARINE MARSH; GROWTH; COMMUNITIES; RESPONSES; PHOTOSYNTHESIS; TRANSPIRATION AB Open top chamber design and function are reviewed. All of the chambers described maintain CO2 concentrations measured at a central location within +/- 30 ppm of a desired target when averaged over the growing season, but the spatial and temporal range within any chamber may be closer to 100 ppm. Compared with unchambered companion plots, open top chambers modify the microenvironment in the following ways: temperatures are increased up to 3-degrees-C depending on the chamber design and location of the measurement; light intensity is typically diminished by as much as 20%; wind velocity is lower and constant; and relative humidity is higher. The chamber environment may significantly alter plant growth when compared with unchambered controls, but the chamber effect on growth has not been clearly attributed to a single or even a few environmental factors. A method for modifying an open top chamber for tracking gas exchange between natural vegetation and the ambient air is described. This modification consists of the addition of a top with exit chimney to reduce dilution of chamber CO2 by external ambient air, is quickly made and permits estimation of the effects of elevated CO2 and water vapor exchange. The relatively simple design and construction of open top chambers make them the most likely method to be used in the near future for long-term elevated CO2 exposure of small trees, crops and grassland ecosystems. Improvements in the basic geometry to improve control of temperature, reduce the variation of CO2 concentrations, and increase the turbulence and wind speed in the canopy boundary layer are desirable objectives. Similarly, modifications for measuring water vapor and carbon dioxide gas exchange will extend the usefulness of open top chambers to include non-destructive monitoring of the responses of ecosystems to rising atmospheric CO2. C1 SMITHSONIAN ENVIRONM RES CTR,POB 28,EDGEWATER,MD 21037. RI Leadley, Paul/E-4773-2012 NR 26 TC 69 Z9 87 U1 3 U2 28 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD JAN PY 1993 VL 104 BP 3 EP 15 DI 10.1007/BF00048141 PG 13 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA KM790 UT WOS:A1993KM79000003 ER PT J AU ARP, WJ DRAKE, BG POCKMAN, WT CURTIS, PS WHIGHAM, DF AF ARP, WJ DRAKE, BG POCKMAN, WT CURTIS, PS WHIGHAM, DF TI INTERACTIONS BETWEEN C-3 AND C-4 SALT-MARSH PLANT-SPECIES DURING 4 YEARS OF EXPOSURE TO ELEVATED ATMOSPHERIC CO2 SO VEGETATIO LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON CO2 AND BIOSPHERE CY NOV 15-19, 1991 CL WAGENINGEN, NETHERLANDS SP NETHERLANDS ORG SCI RES, CO2 COMMISS, ROYAL NETHERLANDS ACAD ARTS OF SCI, MINIST HOUSING PHYS PLANNING & ENVIRONM NETHERLANDS, VRIJE UNIV AMSTERDAM, DEPT ECOL & ECOTOXICOL DE GROWTH; WATER RELATIONS; COMPETITION; DISTRIBUTION ID PINUS-TAEDA SEEDLINGS; LIQUIDAMBAR-STYRACIFLUA; ENRICHMENT; GROWTH; COMPETITION; COMMUNITIES; PERENNIALS; STRESS; GRASS; FIELD AB Elevated atmospheric CO2 is known to stimulate photosynthesis and growth of plants with the C3 pathway but less of plants with the C4 pathway. An increase in the CO2 concentration can therefore be expected to change the competitive interactions between C3 and C4 species. The effect of long term exposure to elevated CO2 (ambient CO2 concentration + 340 mumol CO2 mol-1) on a salt marsh vegetation with both C3 and C4 species was investigated. Elevated CO2 increased the biomass of the C3 sedge Scirpus olneyi growing in a pure stand, while the biomass of the C4 grass Spartina patens in a monospecific community was not affected. In the mixed C3/C4 community the C3 sedge showed a very large relative increase in biomass in elevated CO2 while the biomass of the C4 species declined. The C4 grass Spartina patens dominated the higher areas of the salt marsh, while the C3 sedge Scirpus olneyi was most abundant at the lower elevations, and the mixed community occupied intermediate elevations. Scirpus growth may have been restricted by drought and salt stress at the higher elevations, while Spartina growth at the lower elevations may be affected by the higher frequency of flooding. Elevated CO2 may affect the species distribution in the salt marsh if it allows Scirpus to grow at higher elevations where it in turn may affect the growth of Spartina. C1 SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. RI Pockman, William/D-4086-2014 OI Pockman, William/0000-0002-3286-0457 NR 30 TC 71 Z9 74 U1 1 U2 23 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD JAN PY 1993 VL 104 BP 133 EP 143 DI 10.1007/BF00048149 PG 11 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA KM790 UT WOS:A1993KM79000011 ER PT S AU ZIEBARTH, EK DOERING, ZD AF ZIEBARTH, EK DOERING, ZD BE Thompson, D Benefield, A Bitgood, S Shettel, H Williams, R TI ACCESSIBLE EXHIBITIONS - TESTING THE REALITY SO VISITOR STUDIES: THEORY, RESEARCH AND PRACTICE, VOL 5: COLLECTED PAPERS FROM THE 1992 VISITOR STUDIES CONFERENCE, ST LOUIS, MISSOURI SE VISITOR STUDIES: THEORY RESEARCH AND PRACTICE LA English DT Proceedings Paper CT 1992 Visitor Studies Conference - Visitor Studies: Theory, Research, and Practice CY 1992 CL ST LOUIS, MO SP VISITOR STUDIES ASSOC C1 SMITHSONIAN INST, WASHINGTON, DC 20560 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU VISITOR STUDIES ASSOC PI JACKSONVILLE PA PO BOX 1111, JACKSONVILLE, AL 36265 USA SN 1064-5578 J9 VISITOR STUD THEORY PY 1993 VL 5 BP 76 EP 86 PG 11 WC Art SC Art GA BB47P UT WOS:A1993BB47P00006 ER PT S AU ZIEBARTH, EK DOERING, ZD AF ZIEBARTH, EK DOERING, ZD BE Thompson, D Benefield, A Bitgood, S Shettel, H Williams, R TI ACCESSIBLE EXHIBITIONS - TESTING THE REALITY SO VISITOR STUDIES: THEORY, RESEARCH, AND PRACTICE, VOL 5 SE VISITOR STUDIES: THEORY RESEARCH AND PRACTICE LA English DT Proceedings Paper CT 1992 Visitor Studies Conference CY 1992 CL MO SP VISITOR STUDIES ASSOC C1 SMITHSONIAN INST, WASHINGTON, DC 20560 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU VISITOR STUDIES ASSOC PI JACKSONVILLE PA PO BOX 1111, JACKSONVILLE, AL 36265 USA SN 1064-5578 J9 VISITOR STUD THEORY PY 1993 VL 5 BP 76 EP 86 PG 11 WC Art SC Art GA BC92V UT WOS:A1993BC92V00006 ER PT B AU FLANAGAN, KA GERMAIN, G GOMES, J KEARNS, D LESSING, J MOORE, R MURRAY, S ROLL, R VIOLA, A ZOMBECK, M AF FLANAGAN, KA GERMAIN, G GOMES, J KEARNS, D LESSING, J MOORE, R MURRAY, S ROLL, R VIOLA, A ZOMBECK, M BE Orphan, VJ TI LONG-TERM PHOTOCATHODE STABILITY FOR MICROCHANNEL PLATES IN VACUUM SO X-RAY DETECTOR PHYSICS AND APPLICATIONS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on X-Ray Detector Physics and Applications II CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1258-9 J9 P SOC PHOTO-OPT INS PY 1993 VL 2009 BP 72 EP 83 DI 10.1117/12.164747 PG 12 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BZ74V UT WOS:A1993BZ74V00009 ER PT B AU KENTER, A GODDARD, R GOMES, J LESSING, J MURRAY, S MOORE, R ROLL, R VALENZA, M ZOMBECK, M AF KENTER, A GODDARD, R GOMES, J LESSING, J MURRAY, S MOORE, R ROLL, R VALENZA, M ZOMBECK, M BE Orphan, VJ TI THE MCP READOUT FOR THE AXAF-I GRATING SPECTROMETER SO X-RAY DETECTOR PHYSICS AND APPLICATIONS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on X-Ray Detector Physics and Applications II CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1258-9 J9 P SOC PHOTO-OPT INS PY 1993 VL 2009 BP 84 EP 95 DI 10.1117/12.164748 PG 12 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BZ74V UT WOS:A1993BZ74V00010 ER PT J AU WILDT, DE BROWN, JL BUSH, M BARONE, MA COOPER, KA GRISHAM, J HOWARD, JG AF WILDT, DE BROWN, JL BUSH, M BARONE, MA COOPER, KA GRISHAM, J HOWARD, JG TI REPRODUCTIVE STATUS OF CHEETAHS (ACINONYX-JUBATUS) IN NORTH-AMERICAN ZOOS - THE BENEFITS OF PHYSIOLOGICAL SURVEYS FOR STRATEGIC-PLANNING SO ZOO BIOLOGY LA English DT Article DE REPRODUCTIVE PERFORMANCE; SEMEN; SPERM; HORMONE; OVARY; FOLLICLE; ASSISTED REPRODUCTION AB Under the mandate of a Species Survival Plan (SSP), reproductive status was assessed in 128 cheetahs maintained in 18 different institutions in North America. A mobile laboratory research team evaluated cheetahs using anesthesia, serial blood sampling, electroejaculation (males), and laparoscopy (females). Biomaterials were also collected for parallel studies of genetics, nutrition, and health. There was no mortality, and cheetahs were capable of reproducing naturally after these intense manipulatory examinations. No marked differences were observed in reproductive or endocrine characteristics between proven and unproven breeders. However, males consistently produced teratospermic ejaculates, and cheetah sperm were compromised in conspecific or heterologous in vitro fertilization systems. Structurally abnormal sperm were found to be filtered by the oocyte's zona pellucida. More than 80% of the females were anatomically sound, but morphological and endocrine evidence suggested that approximately 50% or more of the population may have had inactive ovaries at the time of the examination. Males ranging in age from 15 to 182 months produced spermic ejaculates, but motile sperm numbers/ejaculate and circulating testosterone concentrations were highest in males 60 to 120 months old. Parovarian cysts were observed in 51.5% of female cheetahs, but comparisons between proven and unproven subpopulations revealed that this abnormality likely had no influence on fertility. Fresh luteal tissue was not observed in any nonpregnant or nonlactating female, strongly suggesting that the cheetah is an induced ovulator. Overall survey results were discussed in the context of the etiology of reproductive inefficiency, especially with respect to the potential importance of biological versus management factors. Four high priority research areas in cheetah reproductive biology were identified: 1) continuous monitoring of ejaculate quality in the extant population, while studying the impact of pleiomorphisms on fertility; 2) determining the potential relationship between libido and androgen production (excretion) in males; 3) confirming the extent of cyclic, or acyclic, ovarian activity in females; and 4) continued development of assisted reproductive techniques for enhancing management. In summary, a multidisciplinary, multi-institutional survey coordinated through the SSP is both possible and useful for generating a physiological and health database beneficial to driving further research and management initiatives. RP WILDT, DE (reprint author), SMITHSONIAN INST,NOAHS CTR,DEPT ANIM HLTH,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 0 TC 58 Z9 61 U1 2 U2 24 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1993 VL 12 IS 1 BP 45 EP 80 DI 10.1002/zoo.1430120107 PG 36 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA KR769 UT WOS:A1993KR76900006 ER PT J AU HOWARD, J MUNSON, L MCALOOSE, D KRIETE, M BUSH, M WILDT, DE AF HOWARD, J MUNSON, L MCALOOSE, D KRIETE, M BUSH, M WILDT, DE TI COMPARATIVE-EVALUATION OF SEMINAL, VAGINAL, AND RECTAL BACTERIAL-FLORA IN THE CHEETAH AND DOMESTIC CAT SO ZOO BIOLOGY LA English DT Article DE MICROFLORA; REPRODUCTION; ESCHERICHIA-COLI; EJACULATES; FELIDS AB To determine the status and potential impact of microorganisms on reproductive health, bacterial cultures were evaluated from cheetah seminal, vaginal, and rectal swabs and the results compared to those from clinically healthy, domestic cats. Aerobic bacteria were isolated in the semen from 26 of the 40 (65.0%) cheetahs and 25 of the 27 (92.6%) domestic cats. Gram-negative organisms predominated in the electroejaculates of both species, accounting for >70% of the total bacterial isolates. The most common seminal organism in both species was hemolytic Escherichia coli. Bacteria were isolated from vaginal samples obtained from 49 of the 67 (73.1%) cheetahs and 46 of the 49 (93.9%) domestic cats. Gram-negative organisms dominated, representing >63% of the vaginal bacteria, and again hemolytic E. coli was the most prevalent isolate in both species. None of the cheetah or domestic cat vaginal cultures contained Mycoplasma spp. or Ureaplasma spp. Numerous gram-negative and gram-positive bacteria were identified in rectal cultures of 73 cheetahs and 60 domestic cats, but hemolytic E. coli clearly was the most common isolate. Within each species, a comparison between electroejaculates that were positive vs. negative for hemolytic E. coli growth revealed no differences in sperm concentration, sperm motility ratings, or the proportion of structurally abnormal spermatozoa. Neutrophils were not detected in any of the 67 felid ejaculates, and the presence of seminal hemolytic E. coli was unrelated to fertility, on the basis of past ability to sire young or fertilize oocytes in vitro. Vaginal cytologic evaluations in both the cheetah and domestic cat indicated that hemolytic E. coli was not associated with a pathologic inflammatory response. Overall fecundity and proven ability to produce young were similar between females producing positive or negative vaginal cultures for E. coli. These findings indicate that commensal bacteria exist in the reproductive tract of the cheetah and domestic cat, and these organisms constitute normal, apparently innocuous bacterial microflora in the semen and vagina. RP HOWARD, J (reprint author), SMITHSONIAN INST,DEPT ANIM HLTH,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 0 TC 7 Z9 7 U1 2 U2 8 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1993 VL 12 IS 1 BP 81 EP 96 DI 10.1002/zoo.1430120108 PG 16 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA KR769 UT WOS:A1993KR76900007 ER PT J AU CARLSTEAD, K BROWN, JL SEIDENSTICKER, J AF CARLSTEAD, K BROWN, JL SEIDENSTICKER, J TI BEHAVIORAL AND ADRENOCORTICAL RESPONSES TO ENVIRONMENTAL-CHANGES IN LEOPARD CATS (FELIS-BENGALENSIS) SO ZOO BIOLOGY LA English DT Article DE STRESS; STEREOTYPIC PACING; ENVIRONMENTAL ENRICHMENT; EXPLORATORY BEHAVIOR; URINARY CORTISOL; FELIDAE AB Indicators of environmental adequacy relevant to the well-being of small felids are developed by examining, in 4 captive leopard cats, interrelationships between behavioral and adrenocortical responses to changes in housing conditions. Singly housed cats were moved from their barren home cage (Cage 1, baseline) sequentially to 2 new, barren housing situations (Cages 2 and 3; almost-equal-to 10 weeks/cage). Urinary cortisol concentrations, stereotypic pacing, and hiding frequencies were transiently increased for 1 week after translocation to Cage 2. After translocation to Cage 3, cortisol concentrations and hiding also were increased for the first week. However, conditions in Cage 3 were determined to be aversive to the cats, as evidenced by cortisol concentrations that remained chronically elevated for the entire 10-week period. Exploratory behavior was suppressed during this period. When Cage 3 was enriched with a complex of branches and hiding places, urinary cortisol concentrations and stereotypic pacing decreased, and exploration increased. Concealment locations that camouflage were more often used for lying down when urinary cortisol was elevated. These results suggest that reduced exploratory behavior is an indicator of chronic exposure to aversive environmental conditions. Stereotypic pacing may not necessarily increase when adrenocortical activity increases. The results also suggest that enrichment facilitates coping with aversive stimulation by providing behavioral options to confined felids. To promote the welfare of small felids, appropriate camouflaged hiding places should be provided and enrichment programs developed to stimulate exploratory behavior. (C) 1993 Wiley-Liss, Inc. RP CARLSTEAD, K (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 0 TC 95 Z9 97 U1 4 U2 55 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0733-3188 J9 ZOO BIOL JI Zoo Biol. PY 1993 VL 12 IS 4 BP 321 EP 331 DI 10.1002/zoo.1430120403 PG 11 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA LR885 UT WOS:A1993LR88500002 ER PT J AU ACHUCARRO, A KUIJKEN, K PERIVOLAROPOULOS, L VACHASPATI, T AF ACHUCARRO, A KUIJKEN, K PERIVOLAROPOULOS, L VACHASPATI, T TI DYNAMIC SIMULATIONS OF SEMILOCAL STRINGS SO NUCLEAR PHYSICS B LA English DT Article ID COSMIC STRINGS AB We explore the stability of semilocal string numerically. Our results confirm the conclusions of Hindmarsh and also show a range of asymptotic field configurations that will relax to the semilocal string configuration rather than to the trivial vacuum. We also study field configurations corresponding to two semilocal strings with different colours and find that the colour rapidly equilibrates and has little effect on the dynamics of the strings. This result and its limitations are discussed and implications for the evolution of the semilocal string network are drawn. In addition, we construct models that contain monopoles labelled by colour indices. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,DIV OPT & INFRARED ASTRON,CAMBRIDGE,MA 02138. HARVARD SMITHSONIAN CTR ASTROPHYS,DIV THEORET ASTROPHYS,CAMBRIDGE,MA 02138. TUFTS UNIV,DEPT PHYS & ASTRON,TUFTS INST COSMOL,MEDFORD,MA 02155. RP ACHUCARRO, A (reprint author), TUFTS UNIV,DEPT MATH,MEDFORD,MA 02155, USA. OI Perivolaropoulos, Leandros/0000-0001-9330-2371 NR 14 TC 39 Z9 39 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 21 PY 1992 VL 388 IS 2 BP 435 EP 456 DI 10.1016/0550-3213(92)90621-H PG 22 WC Physics, Particles & Fields SC Physics GA KJ686 UT WOS:A1992KJ68600008 ER PT J AU WOLDA, H WRIGHT, SJ AF WOLDA, H WRIGHT, SJ TI ARTIFICIAL DRY SEASON RAIN AND ITS EFFECTS ON TROPICAL INSECT ABUNDANCE AND SEASONALITY SO PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN-BIOLOGICAL CHEMICAL GEOLOGICAL PHYSICAL AND MEDICAL SCIENCES LA English DT Article ID FOREST; AGGREGATION; UNDERSTORY; DIAPAUSE; DROUGHT; BEETLE; CUES AB Two 2 1/4 hectare plots in the tropical forest on Barro Colorado Island, Panama, were irrigated throughout the dry season during three years. Irrigation maintained soil water potential at 25 and 45 cm depth above -0.04 MPa while values in two other similar control plots routinely fell below -1.0 MPa in the dry season. Insect abundance was monitored with two flight-interception traps in each plot. Insects belonging to Homoptera, cockroaches and dungbeetles were analyzed to species, the others to larger taxa. Neither species diversity nor abundance of individual species were noticeably affected by the dry season watering. Seasonal variation in abundance was at best changed by watering in only a few species of dungbeetle and in one homopteran. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 26 TC 4 Z9 4 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0023-3374 J9 P K NED AKAD WETENSC JI Proc. K. Ned. Akad. Wet.-Biol. Chem. Geol. Phys. Med. Sci. PD DEC 21 PY 1992 VL 95 IS 4 BP 535 EP 548 PG 14 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KE467 UT WOS:A1992KE46700008 ER PT J AU DUBINSKI, J AF DUBINSKI, J TI COSMOLOGICAL TIDAL SHEAR SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, THEORY; DARK MATTER; GALAXIES, KINEMATICS AND DYNAMICS ID NONROTATING STELLAR-SYSTEMS; SHELL-ORBIT MODELS; COLD DARK MATTER; ANGULAR-MOMENTUM; DENSITY PERTURBATIONS; ELLIPTICAL GALAXIES; GALACTIC HALOS; ROTATION; KINEMATICS; STABILITY AB The effect of cosmological tidal shear on the structure and kinematics of dark halos is examined using N-body simulations of the collapse of density peaks in the cold dark matter model. The origin of the triaxial nature of dark halos is investigated by comparing the shapes of the density peaks to the shapes of dark halos. Dark halos are generally flatter than their progenitor density perturbations. The shape distribution of dark halos depends strongly on the strength and orientation of the tidal shear field. The kinematics are studied using measurements of angular momentum, streaming motions, tumbling, and velocity ellipsoids of the dark halos. Most of the angular momentum is in the form of streaming motions with tumbling motions having periods exceeding 4 Gyr. The angular momentum vector tends to align with the minor axis of the triaxial dark halos. The alignment of the angular momentum vector probably originates from the alignment of the linear regime torque acting on a triaxial density perturbation. The origin of the tendency for the small misalignment angle between the rotation vector and the apparent minor axis in elliptical galaxies is probably due to this effect. Tidal torques are found to isotropize the velocity ellipsoids of dark halos at large radii in some cases. C1 UNIV TORONTO,DEPT ASTRON,TORONTO M5S 1A1,ONTARIO,CANADA. RP DUBINSKI, J (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 64 TC 55 Z9 55 U1 0 U2 0 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 1992 VL 401 IS 2 BP 441 EP 454 DI 10.1086/172076 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD149 UT WOS:A1992KD14900003 ER PT J AU KOCHANEK, CS NARAYAN, R AF KOCHANEK, CS NARAYAN, R TI LENSCLEAN - AN ALGORITHM FOR INVERTING EXTENDED, GRAVITATIONALLY LENSED IMAGES WITH APPLICATION TO THE RADIO RING LENS PKS 1830-211 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, STRUCTURE; GRAVITATIONAL LENSING; METHODS, NUMERICAL ID EINSTEIN RING; FERMAT PRINCIPLE AB We develop a new algorithm, LensClean, based on the Clean algorithm of radio astronomy, for consistently inverting partially or poorly resolved gravitational lens systems. The method is superior to previous algorithms, particularly when there is inadequate resolution in the observed image, and is significantly more effective at discriminating between good and bad lens models. We have applied LensClean to the 1.7 GHz Merlin and 8 GHz VLA maps of the radio ring lens PKS 1830-211. The quality of the inversions is largely limited by systematic errors in the radio maps, primarily the varying flux ratio of the two compact components. We estimate that the critical radius of the lens in PKS 1830-211 is b = 0.51", the dimensionless ellipticity is gamma = 0.050, and the position angle of the major axis of the lens potential is -2-degrees. The 99% confidence limits on the lens parameters, based on inversions of both the Merlin and VLA maps, are 0.48" < b < 0.52", 0.04 < gamma < 0.08, and -11-degrees < P.A. < 11-degrees. C1 HARVARD UNIV,DEPT MECH ENGN,CAMBRIDGE,MA 02138. RP KOCHANEK, CS (reprint author), HARVARD COLL OBSERV,HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 31 TC 75 Z9 75 U1 0 U2 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 DEC 20 PY 1992 VL 401 IS 2 BP 461 EP 473 DI 10.1086/172078 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD149 UT WOS:A1992KD14900005 ER PT J AU KOLBE, E LANGANKE, K KREWALD, S THIELEMANN, FK AF KOLBE, E LANGANKE, K KREWALD, S THIELEMANN, FK TI STRANGE QUARK CONTRIBUTIONS TO THE NUCLEON AND NEUTRINO NUCLEOSYNTHESIS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ELEMENTARY PARTICLES; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; SUPERNOVAE; GENERAL ID II SUPERNOVAE; SCATTERING; PROTON; SPIN AB We discuss possible effects of the strange quark contributions to the nucleon on reaction cross sections relevant for the neutrino nucleosynthesis in supernova burning. C1 FORSCHUNGSZENTRUM JULICH,INST KERNPHYS,W-5170 JULICH,GERMANY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP KOLBE, E (reprint author), UNIV MUNSTER,INST THEORET PHYS 1,W-4400 MUNSTER,GERMANY. NR 19 TC 4 Z9 4 U1 0 U2 0 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 1992 VL 401 IS 2 BP L89 EP L92 DI 10.1086/186678 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD154 UT WOS:A1992KD15400011 ER PT J AU LOCKWOOD, GW SKIFF, BA BALIUNAS, SL RADICK, RR AF LOCKWOOD, GW SKIFF, BA BALIUNAS, SL RADICK, RR TI LONG-TERM SOLAR BRIGHTNESS CHANGES ESTIMATED FROM A SURVEY OF SUN-LIKE STARS SO NATURE LA English DT Article ID MAIN-SEQUENCE STARS; STELLAR ACTIVITY; LUMINOSITY; CYCLE AB THE brightness of the Sun varies during the 11-year solar cycle, typically by less than 0.1% (refs 1, 2), and a larger brightness variation is thought to have occurred during the Maunder minimum, from AD 1645 to 1715 (refs 3-5). But because individual solar cycles are different in form, amplitude and length, and because accurate solar data have been available only for the most recent two or three cycles, there is no direct way of understanding long-term solar variability. Here we present a compilation of eight years of observations of 33 Sun-like stars and report year-to-year brightness changes that substantially exceed the analogous solar fluctuations. We have also measured chromospheric magnetic activity in these stars and find that it correlates with the brightness variations. During 1980-88, solar chromospheric variability was comparable to that observed in the stellar survey, but solar brightness variations were only one-quarter as large. This suggests that the Sun is in an unusually steady phase compared to similar stars, which means that reconstructing the past historical brightness record, for example from sunspot records, may be more risky than has been generally thought. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. USAF,PHILLIPS LAB,SOLAR RES BRANCH,SUNSPOT,NM 88349. RP LOCKWOOD, GW (reprint author), LOWELL OBSERV,1400 W MARS HILL RD,FLAGSTAFF,AZ 86001, USA. NR 17 TC 55 Z9 55 U1 0 U2 1 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 17 PY 1992 VL 360 IS 6405 BP 653 EP 655 DI 10.1038/360653a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KD082 UT WOS:A1992KD08200047 ER PT J AU BAND, YB JULIENNE, PS AF BAND, YB JULIENNE, PS TI MOLECULAR POPULATION TRANSFER, ALIGNMENT, AND ORIENTATION USING CHIRPED PULSE ABSORPTION SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID STIMULATED RAMAN-SCATTERING; VIBRATIONAL LEVELS; RAPID-PASSAGE; LASER-PULSES; INVERSION; BEAMS; DISSOCIATION; SYSTEMS; NA-2 AB We describe a technique for totally transferring the population of a molecular vibronic level to another optically accessible level by chirped pulse absorption. The method can be applied even for nonvanishing angular momentum states where the Rabi frequencies for the transitions depend on the magnetic quantum number M of the states. The population of a large J initial state can be totally transferred to a J'= J + 1 state by R branch transitions with linearly or circularly polarized light pulses with negative or positive frequency chirp if the bandwidth of the chirped pulse is sufficiently small. For an initial state with small J, having P(Q) and R transitions that are closely spaced in energy and within the chirped pulse bandwidth, the situation is complicated by the presence of transitions involving additional nearby J states which can participate in transitions induced by the chirped pulse. For positive frequency chirp, population can be totally transferred to the excited electronic state, whereas for the negative frequency chirp case the population distribution depends on the details of the energy levels and laser pulse. The technique can be employed to align and orient states in which not all the M states of the initial level are transferred to the same branch, but each M state is totally transferred from the initial state. Criteria for this type of population transfer and alignment and orientation are described and the conditions under which adiabatic passage is maintained are discussed. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA 02138 USA. NATL INST STAND & TECHNOL, DIV MOLEC PHYS, GAITHERSBURG, MD 20899 USA. RP BAND, YB (reprint author), BEN GURION UNIV NEGEV, DEPT CHEM, IL-84105 BEER SHEVA, ISRAEL. RI Julienne, Paul/E-9378-2012 OI Julienne, Paul/0000-0002-5494-1442 NR 21 TC 37 Z9 38 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1992 VL 97 IS 12 BP 9107 EP 9115 DI 10.1063/1.463338 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KE637 UT WOS:A1992KE63700030 ER PT J AU GILLANDERS, GH FEGAN, DJ MACKEOWN, PK WEEKES, TC WHITAKER, T AF GILLANDERS, GH FEGAN, DJ MACKEOWN, PK WEEKES, TC WHITAKER, T TI DEVELOPMENT OF A HIGH-ALTITUDE AIR SHOWER ARRAY FOR GAMMA-RAY ASTRONOMY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID CYGNUS-X-3 AB We describe the design and performance of an extensive air shower array which has been operated in its present configuration at Mount Hopkins, Arizona since 1987. The array has a threshold energy of 40 TeV and is located at the same site as the GRANITE VHE gamma ray astronomy experiment of the Whipple Observatory Collaboration. C1 NATL UNIV IRELAND UNIV COLL DUBLIN,DEPT PHYS,DUBLIN 4,IRELAND. UNIV HONG KONG,DEPT PHYS,HONG KONG,HONG KONG. SMITHSONIAN INST,WHIPPLE OBSERV,AMADO,AZ 85645. RP GILLANDERS, GH (reprint author), NATL UNIV IRELAND UNIV COLL GALWAY,DEPT PHYS,GALWAY,IRELAND. NR 22 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 15 PY 1992 VL 323 IS 3 BP 677 EP 685 DI 10.1016/0168-9002(92)90014-U PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KE735 UT WOS:A1992KE73500014 ER PT J AU GARRETSON, WD FIELD, GB CARROLL, SM AF GARRETSON, WD FIELD, GB CARROLL, SM TI PRIMORDIAL MAGNETIC-FIELDS FROM PSEUDOGOLDSTONE BOSONS SO PHYSICAL REVIEW D LA English DT Article ID INFLATIONARY UNIVERSE; COSMOLOGY; FLATNESS; HORIZON AB The existence of large-scale magnetic fields in galaxies is well established, but there is no accepted mechanism for generating a primordial field which could grow into what is observed today. We discuss a model which attempts to account for the necessary primordial field by invoking a pseudo-Goldstone boson coupled to electromagnetism. The evolution of this boson during inflation generates a magnetic field; however, it seems difficult on rather general grounds to obtain fields of sufficient strength on astrophysically interesting scales. RP GARRETSON, WD (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 23 TC 134 Z9 134 U1 0 U2 0 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 DEC 15 PY 1992 VL 46 IS 12 BP 5346 EP 5351 DI 10.1103/PhysRevD.46.5346 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE697 UT WOS:A1992KE69700013 ER PT J AU JAMES, M PERIVOLAROPOULOS, L VACHASPATI, T AF JAMES, M PERIVOLAROPOULOS, L VACHASPATI, T TI STABILITY OF ELECTROWEAK STRINGS SO PHYSICAL REVIEW D LA English DT Note AB We map the parameter space that leads to stable Z vortices in the electroweak model. For sin2theta(W), = 0.23, we find that the strings are unstable for a Higgs-boson mass larger than 24 GeV. Given the latest constraints on the Higgs-boson mass from the CERN e+e- collider LEP, this shows that, if the standard electroweak model is realized in nature, the Z vortex (in the bare model) is unstable. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,DIV THEORET ASTROPHYS,CAMBRIDGE,MA 02138. TUFTS UNIV,DEPT PHYS & ASTRON,TUFTS INST COSMOL,MEDFORD,MA 02155. BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912. RP JAMES, M (reprint author), UNIV CAMBRIDGE,DEPT APPL MATH & THEORET PHYS,SILVER ST,CAMBRIDGE CB3 9EW,ENGLAND. NR 19 TC 62 Z9 62 U1 0 U2 0 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 DEC 15 PY 1992 VL 46 IS 12 BP R5232 EP R5235 DI 10.1103/PhysRevD.46.R5232 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE697 UT WOS:A1992KE69700003 ER PT J AU LEIBUNDGUT, B PINTO, PA AF LEIBUNDGUT, B PINTO, PA TI A DISTANCE-INDEPENDENT CALIBRATION OF THE LUMINOSITY OF TYPE-IA SUPERNOVAE AND THE HUBBLE CONSTANT SO ASTROPHYSICAL JOURNAL LA English DT Article DE DISTANCE SCALE; STARS, ABUNDANCES; STARS, FUNDAMENTAL PARAMETERS; SUPERNOVAE, GENERAL ID WHITE-DWARF MODELS; ABSOLUTE-MAGNITUDE; VIRGO CLUSTER; LIGHT CURVES; VELOCITIES; GALAXIES; EMISSION; SN-1987A; MOTION; NOVAE AB We present a calibration of the absolute magnitude of Type la supernovae (SNe Ia) at maximum by means of radioactive decay models for the light curve. Comparison of the calculated late time thermalized radiation with a bolometric light curve constructed from observations circumvents problems of modeling the complex physics that govern the peak phase and avoids the conversion of theoretical luminosities into filter magnitudes. The parameter space for the absolute magnitude is explored with several explosion models and a range of rise times. The absolute B magnitudes at maximum are then used to derive a range for the Hubble constant and the distance to the Virgo Cluster of galaxies from SNe la. Critical examination of the Hubble diagram of SNe la at peak yields rigorous limits for H-0 of 45 and 105 km s-1 Mpc-1. Surprisingly, our determination of the value of H-0 is limited strongly by the unknown extinction toward individual supernovae. Improvements on the values of the Hubble constant from SNe la remain mainly in spectral modeling to find appropriate explosion models and in the use of near-infrared filters which are affected less by extinction. RP LEIBUNDGUT, B (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 88 TC 40 Z9 40 U1 0 U2 0 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 10 PY 1992 VL 401 IS 1 BP 49 EP 59 DI 10.1086/172037 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KB243 UT WOS:A1992KB24300005 ER PT J AU DAVIES, MB BENZ, W HILLS, JG AF DAVIES, MB BENZ, W HILLS, JG TI STELLAR ENCOUNTERS INVOLVING NEUTRON-STARS IN GLOBULAR-CLUSTER CORES SO ASTROPHYSICAL JOURNAL LA English DT Article DE CELESTIAL MECHANICS, STELLAR DYNAMICS; GLOBULAR CLUSTERS, GENERAL; HYDRODYNAMICS; STARS, NEUTRON ID 3-DIMENSIONAL HYDRODYNAMICAL SIMULATIONS; DYNAMICAL PROPERTIES; OMEGA-CENTAURI; RED GIANTS; COLLISIONS; EVOLUTION; ANISOTROPY; BINARIES AB Encounters between a 1.4 M. neutron star and a 0.8 M. red giant and main-sequence star are simulated using a three-dimensional smoothed particle hydrodynamics (SPH) code. The rcd giant is modeled as a massive core surrounded by a gaseous envelope, while the main-sequence star is modeled as a polytrope of index n = 1.5. The neutron star is treated as a single particle. Encounters at various impact parameters and with relative velocities pertinent to globular clusters (10 km s-1) are studied. In the case of encounters involving a red giant, bound systems are produced when the separation at periastron passage R(MIN) less than or similar to 2.5R(RG). The effect of the encounter depends strongly on the impact parameter. For close encounters and physical collisions, a common envelope system is produced. After the envelope of gas has been removed, a tight binary comprising of a white dwarf (previously the red giant core) and the neutron star remains. The two stars will spiral toward each other, due to the emission of gravitational radiation, such that the white dwarf will fill its Roche lobe in less than a Hubble time. For more distant encounters (i.e., 1.8R(RG) less than or similar to R(MIN) less than or similar to 2.5R(RG)), a detached binary may be produced that will form an LMXB when the red giant further evolves and fills its Roche lobe. After mass transfer has ceased, such binaries will contain a millisecond pulsar (MSP). For main-sequence stars, an encounter with a neutron star will produce one of two distinct objects: close encounters and physical collisions (i.e., R(MIN) less than or similar to 1.75R(MS)) leave a single object with the neutron star engulfed in a thick disk while the rest of the encounters that produce bound systems (i.e., 1.75R(MS) less than or similar to R(MIN) less than or similar to 3.5R(MS)) may form detached binaries that later pass through an LMXB phase before, presumedly, producing a binary containing an MSP. The subsequent evolution of the thick disk systems is currently unclear. Possibly enough of the material will be accreted by the neutron star to produce a lone MSP. However, even if all these systems do produce MSPs, we still only obtain a factor of 2 increase in the expected ratio of MSPs to LMXBs, which is insufficient to have the standard model (where MSPs are produced from LMXBs) comply with observations. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP DAVIES, MB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 29 TC 48 Z9 48 U1 0 U2 0 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 10 PY 1992 VL 401 IS 1 BP 246 EP 259 DI 10.1086/172056 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KB243 UT WOS:A1992KB24300024 ER PT J AU MENTEN, KM REID, MJ PRATAP, P MORAN, JM WILSON, TL AF MENTEN, KM REID, MJ PRATAP, P MORAN, JM WILSON, TL TI VLBI OBSERVATIONS OF THE 6.7 GHZ METHANOL MASERS TOWARD W3(OH) SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-II REGIONS; ISM, MOLECULES; MASERS; RADIO LINES, ISM; STARS, FORMATION; TECHNIQUES, INTERFEROMETRIC ID H-II REGIONS; HYDROXYL MASERS AB We have conducted very long baseline interferometric (VLBI) observations of the 6.668 GHz maser transition of interstellar methanol toward the ultracompact H II region W3(OH). We have determined absolute maser positions with an accuracy of 0.05" and produced maps that show that the methanol masers have a distribution similar to the hydroxyl masers in this source. The intrinsic sizes of individual maser spots are almost-equal-to 0.0014" (FWHM), or almost-equal-to 3 AU, and are not significantly affected by interstellar scattering. By comparing maps of the 6.7 and 12.2 GHz methanol maser transitions, we find that the maps can be aligned so that the positions of the strongest 6.7 GHz emission features agree to within a maser spot size (almost-equal-to 0.001") with the positions of strong 12.2 GHz features at the same velocities. This result will provide strong constraints on any excitation mechanism for class II methanol masers. C1 MAX PLANCK INST RADIOASTRON,W-5300 BONN 1,GERMANY. RP MENTEN, KM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Moran, James/0000-0002-3882-4414 NR 13 TC 83 Z9 83 U1 0 U2 0 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 10 PY 1992 VL 401 IS 1 BP L39 EP L42 DI 10.1086/186665 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KB244 UT WOS:A1992KB24400011 ER PT J AU BUFFETT, BA AF BUFFETT, BA TI CONSTRAINTS ON MAGNETIC ENERGY AND MANTLE CONDUCTIVITY FROM THE FORCED NUTATIONS OF THE EARTH SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID INNER CORE DYNAMICS; FILTER THEORY; FIELD; IRON; INTERFEROMETRY; VISCOSITY; IMPULSE AB Observations of the Earth's nutations are used to explore the possible presence of a conducting layer at the base of the mantle. The existence of such a layer is suggested by recent experiments on iron and silicate mixtures at high pressures and temperatures (Knittle and Jeanloz, 1986, 1989), which indicate that iron may react with silicate minerals to produce metallic compounds. Nutations provide an ideal tool for investigating the existence of such a layer because they are sensitive to the electrical properties within a thin magnetic boundary layer along the core-mantle boundary (CMB). Evidence in favor of a conducting layer is found in the effects of ohmic dissipation which cause the amplitude of the Earth's nutation to be out-of-phase with tidal forcings. Although out-of-phase components in the Earth's nutations are conventionally attributed to the dissipative influences of ocean tides and mantle anelasticity, these effects appear incapable of explaining nutation amplitudes determined from very long baseline interferometry (VLBI) observations. The additional effects of ohmic dissipation, enhanced by the presence of a thin conducting layer at the CMB, are sufficient to reconcile theory and observation. The largest mismatch between observations and theory, taking account of ocean tides and mantle anelasticity, is a discrepancy of 0.39 +/- 0.04 milliarcseconds in the out-of-phase component of the retrograde annual nutation. This discrepancy can be eliminated if the lowermost 200 m of the mantle has a conductivity of 5 x 10(5)S m-1, and the magnetic energy in the spherical harmonic components of the field at the CMB in degrees l > 12 is approximately 4 times greater than the energy inferred in degrees l less-than-or-equal-to 12 from surface observations. Unfortunately, the VLBI observations do not uniquely resolve the mantle conductivity and magnetic energy, so that trade-offs exist between these two parameters. Nevertheless, a high mantle conductivity is favored on the grounds that the alternative, involving high levels of magnetic energy, yields an excessive amount of ohmic heating. Other interpretations of the VLBI discrepancy are also discussed. One such alternative involves viscous dissipation at the CMB, requiring a kinematic viscosity of nu = 0.1 m2 s-1. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 53 TC 80 Z9 80 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD DEC 10 PY 1992 VL 97 IS B13 BP 19581 EP 19597 DI 10.1029/92JB00977 PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KD951 UT WOS:A1992KD95100003 ER PT J AU BURCH, ES AF BURCH, ES TI INUJJUAMIUT FORAGING STRATEGIES - EVOLUTIONARY ECOLOGY OF AN ARCTIC HUNTING ECONOMY - SMITH,EA SO AMERICAN ANTHROPOLOGIST LA English DT Book Review RP BURCH, ES (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0002-7294 J9 AM ANTHROPOL JI Am. Anthropol. PD DEC PY 1992 VL 94 IS 4 BP 942 EP 943 PG 2 WC Anthropology SC Anthropology GA KD398 UT WOS:A1992KD39800015 ER PT J AU JACKSON, R AF JACKSON, R TI ELLINGTON - THE EARLY YEARS - TUCKER,M SO AMERICAN MUSIC LA English DT Book Review RP JACKSON, R (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV ILLINOIS PRESS PI CHAMPAIGN PA 1325 S OAK ST, CHAMPAIGN, IL 61820 SN 0734-4392 J9 AM MUSIC JI Am. Music PD WIN PY 1992 VL 10 IS 4 BP 486 EP 487 DI 10.2307/3052036 PG 2 WC Music SC Music GA KZ084 UT WOS:A1992KZ08400005 ER PT J AU TAYLOR, L AF TAYLOR, L TI SENSE OF PLACE - AMERICAN REGIONAL CULTURES - ALLEN,B, SCHLERETH,TJ SO APPALACHIAN JOURNAL LA English DT Book Review RP TAYLOR, L (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU APPALACHIAN STATE UNIV APPALACHIAN JOURNAL PI BOONE PA DEPT ENGLISH, BOONE, NC 28608 SN 0090-3779 J9 APPALACHIAN J JI Appalach. J. PD WIN PY 1992 VL 19 IS 2 BP 237 EP 240 PG 4 WC History; Literary Reviews SC History; Literature GA HB961 UT WOS:A1992HB96100021 ER PT J AU SNEDEN, C KRAFT, RP PROSSER, CF LANGER, GE AF SNEDEN, C KRAFT, RP PROSSER, CF LANGER, GE TI OXYGEN ABUNDANCES IN HALO GIANTS .3. GIANTS IN THE MILDLY METAL-POOR GLOBULAR-CLUSTER M5 SO ASTRONOMICAL JOURNAL LA English DT Article ID RR LYRAE STARS; OLD STELLAR POPULATIONS; DEEP CCD PHOTOMETRY; RED GIANTS; NITROGEN ABUNDANCES; OSCILLATOR-STRENGTHS; TRANSITION-PROBABILITIES; CHEMICAL-COMPOSITION; SOLAR ABUNDANCE; NEUTRAL CALCIUM AB We derive abundances of oxygen, sodium, iron-peak, and several traditional "alpha-elements" for giants in the mildly metal-poor globular cluster M5. The data are obtained from Lick Observatory Hamilton Echelle spectra centered on the [O I] doublet. We derive [[Fe/H]] = -1.17+/-0.01 from 13 giants with a range of 350 K in effective temperature. There is no evidence for star-to-star variations in [Fe/H] in this cluster. The range of oxygen abundances is similar to that found earlier in M3 and M92. The largest values of [O/Fe] are near +0.35 and the smallest are near -0.25. The "alpha-elements," e.g., Si, Ca, and Ti, are somewhat overabundant ([el/Fe] approximately +0.2) with little scatter from star to star, as expected on the basis of previous studies of halo field giants in this metallicity domain. The sodium abundances are found to be anticorrelated with the oxygen abundances. Expressed in terms of [O/Fe] and [Na/Fe], the anticorrelation is the same as that found earlier for M3, M13, and the intermediately metal-poor giants of the halo field. Although in M3 and M13 the oxygen and sodium abundances appear to fall into well-separated "O-rich", "O-poor" and "super O-poor" groups, the distribution in M5 is more nearly continuous. We detect no "super O-poor" stars (having [O/Fe] approximately -0.8) in M5. We find that, for those M5 giants in which it has been measured, the strength of the CN band at lambda 3883 is positively correlated with [Na/Fe]. For M13 giants, the CN band strengths are correlated with the abundance of N, and we argue by analogy that the abundance of Na probably is correlated positively with the abundance of N in our sample of M5 giants. This conclusion requires actual nitrogen abundance determinations before it can be substantiated. The anticorrelation of O and Na and the probable correlation of N and Na strongly suggest that there is an ab initio spread in the CNO abundances of M5 stars, and that these elements probably were reshuffled in the cluster by Bethe cycle CNO processing before the stars we now observe were born. C1 UNIV TEXAS,MCDONALD OBSERV,AUSTIN,TX 78712. UNIV CALIF SANTA CRUZ,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. COLORADO COLL,DEPT PHYS,COLORADO SPRINGS,CO 80903. RP SNEDEN, C (reprint author), UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712, USA. NR 89 TC 120 Z9 121 U1 0 U2 0 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 1992 VL 104 IS 6 BP 2121 EP 2140 DI 10.1086/116388 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JZ639 UT WOS:A1992JZ63900008 ER PT J AU SOKER, N ZUCKER, DB BALICK, B AF SOKER, N ZUCKER, DB BALICK, B TI THE DENSITY PROFILE OF THE ELLIPTIC PLANETARY-NEBULA NGC-3242 SO ASTRONOMICAL JOURNAL LA English DT Article ID DOUBLE-CORE EVOLUTION; SHELLS; STAR AB We present the three-dimensional density structure of the elliptical planetary nebula NGC 3242, deconvolved from its Halpha image. Using the simplistic assumptions that each mass element preserves its original velocity, which is radial and depends only on latitude, we deduce from this density profile the variation of mass-loss rate from the progenitor of NGC 3242 with latitude and time. The resulting somewhat qualitative mass-loss geometry and history are used to constrain models for the formation of the elliptical structure of NGC 3242. We argue that a triple system, with a very close brown dwarf companion and a more massive distant tertiary star, is compatible with the morphology of NGC 3242. In this model the brown dwarf, of approximately 0.01 M ., shared a common envelope with the progenitor star, and spun up the envelope through deposition of angular momentum. The oblate rotating envelope blew an axisymmetrical wind. We suggest that the presence of a third star, with a mass of approximately 1 M . and an orbital period of approximately 4000 years, could have caused the large scale deviation from axial symmetry seen in the density structure. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV WASHINGTON,DEPT ASTRON,SEATTLE,WA 98195. NR 29 TC 16 Z9 16 U1 0 U2 0 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 1992 VL 104 IS 6 BP 2151 EP 2160 DI 10.1086/116390 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JZ639 UT WOS:A1992JZ63900010 ER PT J AU LUU, JX JEWITT, DC AF LUU, JX JEWITT, DC TI NEAR-APHELION CCD PHOTOMETRY OF COMET-P/SCHWASSMANN-WACHMANN-2 SO ASTRONOMICAL JOURNAL LA English DT Article ID COMET P/TEMPEL-2; NUCLEUS AB We present CCD photometry of comet P/Schwassmann-Wachmann 2 obtained at 4.58 AU. The observations reveal cyclic variations in the comet brightness about a mean apparent red magnitude m(R)=21.05+/-0.06 mag and a range of approximately 0.5 mag. We find a best-fit lightcurve period P0= 5.58+/-0.03 h, which we interpret as the rotation period of the nucleus. No coma was seen in the individual exposures, but a faint coma extension toward the west was observed in a summed image. The derived upper limit to the radius of the nucleus is 3.1 km (assuming a value 0.04 for the geometric albedo). This renders Schwassmann-Wachmann 2 one of the smallest comet nuclei yet studied. The presence of cometary activity in Schwassmann-Wachmann 2 at a large heliocentric distance is consistent with the hypothesis of Rickman et al. [AJ, 102, 1446 (1991)] that comets new to the inner solar system possess relatively large free-sublimating areas on their surfaces. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822. NR 26 TC 38 Z9 38 U1 0 U2 0 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 1992 VL 104 IS 6 BP 2243 EP 2249 DI 10.1086/116400 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JZ639 UT WOS:A1992JZ63900020 ER PT J AU BEERS, TC GEBHARDT, K HUCHRA, JP FORMAN, W JONES, C BOTHUN, GD AF BEERS, TC GEBHARDT, K HUCHRA, JP FORMAN, W JONES, C BOTHUN, GD TI A SPATIAL, KINEMATICAL, AND DYNAMIC ANALYSIS OF ABELL-400 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; GALAXIES, DISTANCES AND REDSHIFTS ID BRIGHTEST CLUSTER GALAXIES; X-RAY; EXOSAT OBSERVATIONS; MULTIPLE-NUCLEI; MORPHOLOGY; SUBSTRUCTURE; EINSTEIN; SAMPLE; SCALE; RADIO AB A detailed spatial, kinematical, and dynamical analysis is presented for the cluster A400, based on a nearly complete redshift survey of bright galaxies within 1 Mpc of the cluster center (88 of 92 galaxies in the field studied by Dressler). The structure of this cluster is shown to be rather complex. We identify a dispersed component with a high fraction of spiral galaxies at a velocity of 8200 km s-1, and a background group with a mean velocity of 13,400 km s-1. Although we consider a model in which A400 is comprised of a single cluster at a central location in velocity space on the order of 7000 km s-1, we propose that the main body of A400 is composed of at least two individual subclusters. If subclustering is ignored, the derived dispersion of the 88 galaxies with measured velocities within 4000 km s-1 of the bright dumbbell galaxy near the cluster center is 702 km s-1. When kinematic information is used to split A400 into likely subclusters, the velocity dispersions of the individual units which make up this cluster are on the order of 200-300 km s-1. If A400 is considered a single entity (including the dispersed high-velocity spiral-rich component), the inferred blue mass-to-light ratio is 1210 M./L.. If the cluster at 7000 km s-1 is taken to be a single entity, the inferred mass-to-light ratio is 615 M./L., which is still higher than is found for most rich clusters, If the primary sublusters which make up this low-velocity structure are considered separately, their derived mass-to-light ratios drop to roughly 300 M./L., in line with estimates for other groups and clusters. Application of a simple two-body dynamical model indicates that the two primary subclusters in A400 are bound to one another, and are presently infalling with relative velocity difference on the order of either 700 km s-1 or 2000 km s-1 depending on the projection angle of the system with respect to the plane of the sky. We argue that A400 is an example of a presently occurring merger, and that the individual components of the dumbbell galaxy were once individual D galaxies within the premerger subclusters. A400 harbors the unusual radio source 3C 75, which is associated with the bright central dumbbell galaxy. Each component of the dumbbell galaxy exhibits a twin radio jet; these jets bend in a common direction on the sky. The complex structure of 3C 75 might well be explained by our subcluster collision model. The Einstein X-ray image of A400 exhibits an apparent asymmetry in the central regions, with a major axis approximately aligned along a direction parallel to the initial bend of the wide-angle-tail radio sources. The inferred collisional velocity of the subclusters is large enough to cause the bending in the radio jets due to the motion of the D galaxies through the intracluster gas trapped in the potential wells of each subcluster. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV OREGON,DEPT PHYS & ASTRON,EUGENE,OR 97403. RP BEERS, TC (reprint author), MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824, USA. OI Forman, William/0000-0002-9478-1682 NR 51 TC 64 Z9 64 U1 0 U2 0 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 1992 VL 400 IS 2 BP 410 EP 429 DI 10.1086/172006 PN 1 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JY438 UT WOS:A1992JY43800003 ER PT J AU GEHRZ, RD JONES, TJ WOODWARD, CE GREENHOUSE, MA WAGNER, RM HARRISON, TE HAYWARD, TL BENSON, J AF GEHRZ, RD JONES, TJ WOODWARD, CE GREENHOUSE, MA WAGNER, RM HARRISON, TE HAYWARD, TL BENSON, J TI THE PECULIAR INFRARED TEMPORAL DEVELOPMENT OF NOVA VULPECULAE 1987 (QV VULPECULAE) SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; DUST, EXTINCTION; NOVAE, CATACLYSMIC VARIABLES; STARS, INDIVIDUAL (QV VUL) ID OPTICAL CONTINUUM SPECTRUM; DUST CONDENSATION; EMISSION FEATURES; SILICATE GRAINS; CLASSICAL NOVAE; SUPERNOVA 1987A; MICRON SPECTRUM; CORONAL LINES; BINARY-SYSTEM; AQUILAE 1982 AB We report 1.25-19.5 mum infrared photometry and optical/infrared spectroscopy of Nova QV Vul (1987) from 1987 November through 1989 September. The measurements show that an optically thick carbon dust shell formed within 83 days of the outburst, and that the spectral signatures of four types of astrophysical grains appeared at various times during a 2 year period following the eruption. Carbon, SiC, and hydrocarbons formed first; oxygen-rich silicates formed later. The ejecta in which the optically thick carbon grain shell condensed were apparently moving at nearly 3 times the velocity of the principle ejecta responsible for the early emission from the hot gas pseudophotosphere. We suggest the possibility that the carbon dust components formed in fast-moving polar plumes, and that the silicates formed in a slow-moving equatorial ring. Mass estimates from the infrared photometry and optical spectroscopy confirm that grain condensation in both the slow and fast ejecta of QV Vul is consistent with constraints established by previous observations of other dusty novae. The physical properties of the dust condensation zones are discussed, and numerical estimates of the dust mass are given for carbon and silicates. We conclude that the condensible elements in these grains were present in approximately solar abundance. C1 UNIV WYOMING,WYOMING INFRARED OBSERV,DEPT PHYS & ASTRON,LARAMIE,WY 82071. SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,WASHINGTON,DC 20260. OHIO STATE UNIV,DEPT ASTRON,COLUMBUS,OH 43210. AUSTRALIAN NATL UNIV,MT STROMLO OBSERV,WESTON,ACT 2611,AUSTRALIA. CORNELL UNIV,CTR RADIO PHYS & SPACE RES,ITHACA,NY 14853. RP GEHRZ, RD (reprint author), UNIV MINNESOTA,SCH PHYS & ASTRON,DEPT ASTRON,116 CHURCH ST SE,MINNEAPOLIS,MN 55455, USA. NR 52 TC 37 Z9 37 U1 0 U2 0 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 1992 VL 400 IS 2 BP 671 EP 680 DI 10.1086/172029 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JY438 UT WOS:A1992JY43800026 ER PT J AU GRAY, DF BALIUNAS, SL LOCKWOOD, GW SKIFF, BA AF GRAY, DF BALIUNAS, SL LOCKWOOD, GW SKIFF, BA TI THE ACTIVITY CYCLE OF SIGMA-DRACONIS SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, ACTIVITY; STARS, INDIVIDUAL (SIGMA-DRACONIS) ID MAGNETIC-FIELDS; STELLAR ACTIVITY; TIME-SERIES; STARS; GRANULATION; DWARF AB The temperature and granulation of several dwarf stars have been monitored since 1984. The results for sigma Dra (HR 7462, HD 185144, K0 V) are discussed in this paper. Temperature is monitored using a line-depth ratio, and temperature variations almost-equal-to 5 K are seen. Intermediate-band photometry and Ca II H and K-line emission mimic the temperature changes: a monotonic decline from the 1984 season, a smooth minimum around 1988, followed by a rise back to the 1984 values at the current time. These types of correlated changes are similar to the solar behavior. The full length of the cycle cannot yet be determined. The temperature variations are physically compatible with the photometric ones, implying a constant radius over the activity cycle. Granulation is invariant during this portion of the activity cycle, at least to the level of almost-equal-to +/- 3 m s-1 or about +/- 5%. These results confirm the importance of viewing the solar cycle within the context of stellar activity. The temperature variations by themselves can also be interpreted as rotational modulation with a 20.3 day period, but no evidence of this period is seen in the photometry, the H and K emission, or the line asymmetries, and it seems likely it is a chance occurrence. The 1985 season H and K observations show a significant period of 26.5 days, but again, this periodicity is not detected in other parameters. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. LOWELL OBSERV,FLAGSTAFF,AZ 86001. RP GRAY, DF (reprint author), UNIV WESTERN ONTARIO,DEPT ASTRON,LONDON N6A 3K7,ONTARIO,CANADA. NR 44 TC 31 Z9 32 U1 0 U2 0 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 1992 VL 400 IS 2 BP 681 EP 691 DI 10.1086/172030 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JY438 UT WOS:A1992JY43800027 ER PT J AU CONDIT, R HUBBELL, SP FOSTER, RB AF CONDIT, R HUBBELL, SP FOSTER, RB TI SHORT-TERM DYNAMICS OF A NEOTROPICAL FOREST SO BIOSCIENCE LA English DT Article ID TROPICAL RAIN FORESTS; SEED DISPERSAL; TREE; RECRUITMENT; DISTANCE; SURVIVAL; CONSEQUENCES; PATHOGENS; DIVERSITY; PLANTS C1 FIELD MUSEUM NAT HIST,DEPT BOT,CHICAGO,IL 60605. PRINCETON UNIV,DEPT ECOL & EVOLUTIONARY BIOL,PRINCETON,NJ 08544. RP CONDIT, R (reprint author), SMITHSONIAN TROP RES INST,CTR TROP FOREST SCI,BALBOA,PANAMA. NR 39 TC 70 Z9 79 U1 1 U2 16 PU AMER INST BIOLOGICAL SCI PI WASHINGTON PA 1444 EYE ST, NW, STE 200, WASHINGTON, DC 20005 SN 0006-3568 J9 BIOSCIENCE JI Bioscience PD DEC PY 1992 VL 42 IS 11 BP 822 EP 828 DI 10.2307/1312081 PG 7 WC Biology SC Life Sciences & Biomedicine - Other Topics GA JZ458 UT WOS:A1992JZ45800004 ER PT J AU BIERREGAARD, RO LOVEJOY, TE KAPOS, V DOSSANTOS, AA HUTCHINGS, RW AF BIERREGAARD, RO LOVEJOY, TE KAPOS, V DOSSANTOS, AA HUTCHINGS, RW TI THE BIOLOGICAL DYNAMICS OF TROPICAL RAIN-FOREST FRAGMENTS SO BIOSCIENCE LA English DT Article ID MALE EUGLOSSINE BEES; ISLAND BIOGEOGRAPHY; CONSERVATION; AMAZONIA; TURNOVER; RAIN C1 SMITHSONIAN INST,WASHINGTON,DC 20560. UNIV CAMBRIDGE,DEPT BOT,CAMBRIDGE CB2 3EA,ENGLAND. INPA,BDFFP,MANAUS,AMAZONAS,BRAZIL. RP BIERREGAARD, RO (reprint author), NATL MUSEUM NAT HIST,FOREST FRAGMENT PROJECT,WASHINGTON,DC 20560, USA. RI Kapos, Valerie/G-3136-2010 OI Kapos, Valerie/0000-0002-5739-8262 NR 47 TC 420 Z9 468 U1 7 U2 53 PU AMER INST BIOLOGICAL SCI PI WASHINGTON PA 1444 EYE ST, NW, STE 200, WASHINGTON, DC 20005 SN 0006-3568 J9 BIOSCIENCE JI Bioscience PD DEC PY 1992 VL 42 IS 11 BP 859 EP 866 DI 10.2307/1312085 PG 8 WC Biology SC Life Sciences & Biomedicine - Other Topics GA JZ458 UT WOS:A1992JZ45800008 ER PT J AU SMITH, AP HOGAN, KP IDOL, JR AF SMITH, AP HOGAN, KP IDOL, JR TI SPATIAL AND TEMPORAL PATTERNS OF LIGHT AND CANOPY STRUCTURE IN A LOWLAND TROPICAL MOIST FOREST SO BIOTROPICA LA English DT Article DE CANOPY STRUCTURE; LIGHT ENVIRONMENT; TROPICAL FOREST; TREEFALL GAPS; UNDERSTORY ID PHOTOSYNTHETIC RESPONSES; CARBON GAIN; UNDERSTORY; GAPS; ENVIRONMENTS; ACCLIMATION; EFFICIENCY; RADIATION; TREEFALLS; PANAMA AB Computer-assisted image processing of hemispherical photographs of the forest canopy was used to study the light environment of a mature lowland moist tropical forest in the Republic of Panama. Wet and dry-season measurements were made in 1983 and 1984 near ground level at 2.5 m intervals along two 1-km long transects; additional measurements were made at a single site at 5 heights from forest floor to above-canopy, and in 10 experimentally produced treefall gaps in which understory herb responses to gap formation were also monitored. Mean daily global radiation along the transects showed no distinct dichotomy corresponding to ''gap'' versus ''understory'' habitats. Light measurements showed the effect of seasonality in rainfall, and year-to-year correlation was low, indicating the need for frequent assessment of the light environment for long-term studies of plant responses. Various measures of total irradiance (e.g., canopy openness, minutes of potential sunflecks, total solar energy) were highly correlated. However, the correlation of canopy openness in the eastern and western octants of the hemispherical images was low, indicating that the time of day in which direct sunlight occurs may differentiate microsites with similar daily total light levels. In treefall gaps, the light environment was more heterogeneous one year after treefalls; but, two years after the treefall, light levels were both lower and more homogeneous. Both spatial and temporal complexity in the light environment suggest that ''gap'' versus ''understory'' characterizations are too simplistic. RP SMITH, AP (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 36 TC 77 Z9 81 U1 3 U2 11 PU ASSN TROP BIOL PI ST LOUIS PA MISSOURI BOTANICAL GARDEN 2345 TOWER GROVE AVE, ST LOUIS, MO 63110 SN 0006-3606 J9 BIOTROPICA JI Biotropica PD DEC PY 1992 VL 24 IS 4 BP 503 EP 511 DI 10.2307/2389012 PG 9 WC Ecology SC Environmental Sciences & Ecology GA KF074 UT WOS:A1992KF07400003 ER PT J AU HARVEY, AW AF HARVEY, AW TI 3-TAXON STATEMENTS - MORE PRECISELY, AN ABUSE OF PARSIMONY SO CLADISTICS-THE INTERNATIONAL JOURNAL OF THE WILLI HENNIG SOCIETY LA English DT Article ID INFORMATION-CONTENT; CHARACTER C1 SMITHSONIAN MARINE STN,FT PIERCE,FL 34946. RP HARVEY, AW (reprint author), CALIF ACAD SCI,DEPT INVERTEBRATE ZOOL & GEOL,GOLDEN GATE PK,SAN FRANCISCO,CA 94118, USA. NR 14 TC 17 Z9 17 U1 1 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0748-3007 J9 CLADISTICS JI Cladistics-Int. J. Willi Hennig Soc. PD DEC PY 1992 VL 8 IS 4 BP 345 EP 354 DI 10.1111/j.1096-0031.1992.tb00076.x PG 10 WC Evolutionary Biology SC Evolutionary Biology GA KV774 UT WOS:A1992KV77400004 ER PT J AU CORRELL, DL JORDAN, TE WELLER, DE AF CORRELL, DL JORDAN, TE WELLER, DE TI NUTRIENT FLUX IN A LANDSCAPE - EFFECTS OF COASTAL LAND-USE AND TERRESTRIAL COMMUNITY MOSAIC ON NUTRIENT TRANSPORT TO COASTAL WATERS SO ESTUARIES LA English DT Article; Proceedings Paper CT SYMP ON COUPLING BETWEEN WATERSHEDS AND COASTAL WATER, AS PART OF 5TH INTERNATIONAL CONGRESS OF ECOLOGY ( INTECOL ) CY AUG, 1990 CL YOKOHAMA, JAPAN ID RHODE RIVER ESTUARY; PLAIN WATERSHEDS; BRACKISH MARSHES; CHESAPEAKE BAY; TIDAL MARSHES; NITROGEN; SEDIMENTATION; PHOSPHORUS; DYNAMICS; FORESTS AB Long-term interdisciplinary studies of the Rhode River estuary and its watershed in the mid-Atlantic coastal plain of North America have measured fluxes of nitrogen and phosphorus fractions through the hydrologically-linked ecosystems of this landscape. These ecosystems are upland forest, cropland, and pasture; streamside riparian forests; floodplain swamps; tidal brackish marshes and mudflats; and an estuarine embayment. Croplands discharged far more nitrogen per hectare in runoff than did forests and pastures. However, riparian deciduous hardwood forest bordering the cropland removed over 80 percent of the nitrate and total phosphorus in overland flows and about 85 percent of the nitrate in shallow groundwater drainage from cropland. Nevertheless, nutrient discharges from riparian forests downslope from croplands still exceeded discharges from pastures and other forests. The atomic ratio of nitrogen to phosphorus discharged from the watersheds into the estuary was about 9 for total nutrients and 6 for inorganic nutrient fractions. Such a low N:P ratio would promote nitrogen rather than phosphorus limitation of phytoplankton growth in the estuary. Estuarine tidal marshes trapped particulate nutrients and released dissolved nutrients. Subtidal mudflats in the upper estuary trapped particulate P, released dissolved phosphate, and consumed nitrate. This resulted in a decrease in the ratio of dissolved inorganic N:P in the estuary. However, the upper estuary was a major sink for total phosphorus due to sediment accretion in the subtidal area. Bulk precipitation accounted for 31 percent of the total nongaseous nitrogen influx to the landscape, while farming accounted for 69 percent. Forty-six percent of the total non-gaseous nitrogen influx was removed as farm products, 53 percent either accumulated in the watershed or was lost in gaseous forms, and 1 percent entered the Rhode River. Of the total phosphorus influx to the landscape, 7 percent was from bulk precipitation and 93 percent was from farming. Forty-five percent of the total phosphorus influx was removed as farm products, 48 percent accumulated in the watershed, and 7 percent entered the Rhode River. These nitrogen and phosphorus discharges into the Rhode River, although a small fraction of total loadings to the watershed, were large enough to cause seriously overenriched conditions in the upper estuary. RP CORRELL, DL (reprint author), SMITHSONIAN ENVIRONM RES CTR,POB 28,EDGEWATER,MD 21037, USA. OI Weller, Donald/0000-0002-7629-5437 NR 37 TC 134 Z9 141 U1 1 U2 18 PU ESTUARINE RES FEDERATION PI LAWRENCE PA PO BOX 368, LAWRENCE, KS 66044 SN 0160-8347 J9 ESTUARIES JI Estuaries PD DEC PY 1992 VL 15 IS 4 BP 431 EP 442 DI 10.2307/1352388 PG 12 WC Environmental Sciences; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA KR471 UT WOS:A1992KR47100002 ER PT J AU EBERHARD, WG AF EBERHARD, WG TI SPECIES ISOLATION, GENITAL MECHANICS, AND THE EVOLUTION OF SPECIES-SPECIFIC GENITALIA IN 3 SPECIES OF MACRODACTYLUS BEETLES (COLEOPTERA, SCARABEIDAE, MELOLONTHINAE) SO EVOLUTION LA English DT Article DE BEETLES; CRYPTIC FEMALE CHOICE; GENITALIC EVOLUTION; LOCK AND KEY; SPECIES ISOLATION; SPECIFIC MATE RECOGNITION ID CRYPTIC FEMALE CHOICE; RECOGNITION; COURTSHIP AB The question asked was why male genitalic structures have diverged in three syntopic species of Macrodactylus beetles. Four hypotheses were evaluated: 1. The ways in which male genitalia mesh with internal female structures indicate that selection for species isolation via mechanical exclusion (''lock and key'') is unlikely to explain the genitalic differences. 2. The specific mate recognition hypothesis also clearly fails to explain genitalic differences due to the implausibility of postulated environmental effects on genitalia, and lack of postulated coevolution of male and female morphologies. 3. Selection for species isolation via differences in genitalic stimulation (sensory lock and key) is unlikely due to relatively infrequent cross-specific pair formation and intromission in the field, and ''excessive'' numbers of species-specific genitalic structures and male courtship behavior patterns which nevertheless occasionally fail. It also fails to explain the frequent failure of intraspecific copulations to result in sperm transfer. This hypothesis cannot, however, be rejected as confidently as the previous hypotheses. 4. Conditions under which sexual selection by cryptic female choice could take place are common. Females frequently exercise their ability to prevent sperm transfer by conspecific males even after intromission has occurred, and females generally mate repeatedly, probably with different males. Males behave as if cryptic female choice is occurring, courting assiduously while their genitalia are within the female. Sexual selection by female choice could thus contribute to the divergence in genitalic structures. C1 UNIV COSTA RICA,ESCUELA BIOL,SAN JOSE,COSTA RICA. RP EBERHARD, WG (reprint author), UNIV COSTA RICA,SMITHSONIAN TROP RES INST,CIUDAD UNIV,SAN JOSE,COSTA RICA. NR 20 TC 24 Z9 24 U1 0 U2 6 PU SOC STUDY EVOLUTION PI LAWRENCE PA 810 E 10TH STREET, LAWRENCE, KS 66044 SN 0014-3820 J9 EVOLUTION JI Evolution PD DEC PY 1992 VL 46 IS 6 BP 1774 EP 1783 DI 10.2307/2410030 PG 10 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA KG897 UT WOS:A1992KG89700012 ER PT J AU BEDINI, S AF BEDINI, S TI HISTORIC SCIENTIFIC RELIC HIDDEN IN THE PALAZZO-VECCHIO SO INTERDISCIPLINARY SCIENCE REVIEWS LA English DT Article AB In November 1667, the great clock in the tower of the Palazzo Vecchio, Florence, began to strike the hours. It incorporated the horary inventions of Galileo Galilei, the pinwheel type of escapement and the pendulum regulator. The origin of this historic clock, its installation and subsequent history are here described and illustrated. RP BEDINI, S (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INST MATERIALS PI LONDON PA 1 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5DB SN 0308-0188 J9 INTERDISCIPL SCI REV JI Interdiscip. Sci. Rev. PD DEC PY 1992 VL 17 IS 4 BP 382 EP 384 PG 3 WC Multidisciplinary Sciences; Social Sciences, Interdisciplinary SC Science & Technology - Other Topics; Social Sciences - Other Topics GA MK923 UT WOS:A1992MK92300017 ER PT J AU BEDINI, SA AF BEDINI, SA TI SCIENTIFIC INSTRUMENTS AND EXPERIMENTAL PHILOSOPHY 1550-1850 - TURNER,GL SO INTERDISCIPLINARY SCIENCE REVIEWS LA English DT Book Review RP BEDINI, SA (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU INST MATERIALS PI LONDON PA 1 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5DB SN 0308-0188 J9 INTERDISCIPL SCI REV JI Interdiscip. Sci. Rev. PD DEC PY 1992 VL 17 IS 4 BP 388 EP 389 PG 2 WC Multidisciplinary Sciences; Social Sciences, Interdisciplinary SC Science & Technology - Other Topics; Social Sciences - Other Topics GA MK923 UT WOS:A1992MK92300019 ER PT J AU ALEXANDER, SA COLDWELL, RL MORGAN, JD AF ALEXANDER, SA COLDWELL, RL MORGAN, JD TI GUIDING-FUNCTION OPTIMIZATION IN BIASED-SELECTION MONTE-CARLO CALCULATIONS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CONFIGURATION INTERACTION CALCULATIONS; TRANSFORM WAVE-FUNCTIONS; POTENTIAL-ENERGY CURVE; HELIUM-LIKE IONS; HYDROGEN MOLECULE; GAUSSIAN FUNCTIONS; GROUND-STATE; CONVERGENCE; ACCURACY; MG-10(+) AB We show that the guiding function, which is used to generate the Monte Carlo integration points in a biased-selection calculation, can be optimized so as to minimize the statistical error of an expectation value. For excited states we introduce an orthogonalizing part into the minimization functional to prevent ground and excited states from mixing. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. UNIV DELAWARE,DEPT PHYS & ASTRON,NEWARK,DE 19716. RP ALEXANDER, SA (reprint author), UNIV FLORIDA,INST ASTROPHYS & PLANETARY EXPLORAT,GAINESVILLE,FL 32611, USA. NR 37 TC 30 Z9 30 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 1 PY 1992 VL 97 IS 11 BP 8407 EP 8414 DI 10.1063/1.463410 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KA706 UT WOS:A1992KA70600055 ER PT J AU GOODSON, DZ LOPEZCABRERA, M HERSCHBACH, DR MORGAN, JD AF GOODSON, DZ LOPEZCABRERA, M HERSCHBACH, DR MORGAN, JD TI LARGE-ORDER DIMENSIONAL PERTURBATION-THEORY FOR 2-ELECTRON ATOMS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LARGE N-EXPANSION; SCHRODINGER-EQUATION; QUANTUM-MECHANICS; STRONG-FIELD; VARIABLE DIMENSIONALITY; ELECTRONIC-STRUCTURE; LIMIT; 1/N-EXPANSION; DEGENERACIES; SEPARATION AB An asymptotic expansion for the electronic energy of two-electron atoms is developed in powers of delta=1/D, the reciprocal of the Cartesian dimensionality of space. The expansion coefficients are calculated to high order (approximately 20 to 30) by an efficient recursive procedure. Analysis of the coefficients elucidates the singularity structure in the D --> infinity limit, which exhibits aspects of both an essential singularity and a square-root branch point. Pade-Borel summation incorporating results of the singularity analysis yields highly accurate energies; the quality improves substantially with increase in either D or the nuclear charge Z. For He, we obtain 9 significant figures for the ground state and 11 for the 2p2 3P(e) doubly excited state, which is isomorphic with the ground state at D=5 by virtue of interdimensional degeneracy. The maximum accuracy obtainable appears to be limited only by accumulation of roundoff error in the expansion coefficients. The method invites application to systems with many electrons or subject to external fields. C1 UNIV DELAWARE, DEPT PHYS & ASTRON, NEWARK, DE 19716 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA 02138 USA. RP HARVARD UNIV, DEPT CHEM, CAMBRIDGE, MA 02138 USA. NR 65 TC 39 Z9 39 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 1 PY 1992 VL 97 IS 11 BP 8481 EP 8496 DI 10.1063/1.463419 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KA706 UT WOS:A1992KA70600065 ER PT J AU COLES, WA ESSER, R AF COLES, WA ESSER, R TI AN OBSERVATIONAL LIMIT TO THE AMPLITUDE OF ALFVEN WAVES IN THE SOLAR-WIND AND COMPARISON WITH AN ACCELERATION MODEL SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID DENSITY-FLUCTUATIONS AB Measurements of angular scattering of cosmic radio sources observed near the solar limb indicate that the density microstructure can be highly anisotropic (Armstrong et al., 1990). Here we point out that Alfven waves, which are known to be present in the solar wind, will tend to isotropize the angular scattering measurements. Thus such observations set an upper bound on the amplitude of Alfven waves in the scattering region. Recently measurements of velocity versus distance were made near the Sun (using interplanetary scintillations). In about half of the observed streams the velocity profiles were found to be consistent with an MHD model of the solar wind in which Alfven waves are used to increase the flow velocities (Coles et al., 1991). In this paper we demonstrate that the Alfven wave amplitudes necessary to match the measured velocities are consistent with the bounds derived here from angular scattering observations. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP COLES, WA (reprint author), UNIV CALIF SAN DIEGO,ELECT & COMP ENGN,LA JOLLA,CA 92093, USA. NR 30 TC 15 Z9 15 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD DEC 1 PY 1992 VL 97 IS A12 BP 19139 EP 19148 DI 10.1029/92JA01572 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD128 UT WOS:A1992KD12800004 ER PT J AU NEUFELD, MJ AF NEUFELD, MJ TI THE SPACE TELESCOPE - A STUDY OF NASA, SCIENCE, TECHNOLOGY, AND POLITICS - SMITH,RW SO JOURNAL OF INTERDISCIPLINARY HISTORY LA English DT Book Review RP NEUFELD, MJ (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU MIT PRESS PI CAMBRIDGE PA 55 HAYWARD ST JOURNALS DEPT, CAMBRIDGE, MA 02142 SN 0022-1953 J9 J INTERDISCIPL HIST JI J. Interdiscip. Hist. PD WIN PY 1992 VL 22 IS 3 BP 551 EP 553 DI 10.2307/205027 PG 3 WC History SC History GA GY287 UT WOS:A1992GY28700044 ER PT J AU LUHR, JF AF LUHR, JF TI SLAB-DERIVED FLUIDS AND PARTIAL MELTING IN SUBDUCTION ZONES - INSIGHTS FROM 2 CONTRASTING MEXICAN VOLCANOS (COLIMA AND CEBORUCO) SO JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH LA English DT Article ID NATURAL SILICATE LIQUIDS; MOUNT-ST-HELENS; CHEMICAL CHARACTERISTICS; SOUTHWESTERN MEXICO; ELEMENT CONSTRAINTS; COMPLEX SYSTEMS; PHASE-RELATIONS; ARC MAGMAS; ISLAND; ORIGIN AB Colima and Ceboruco are the only two historically active volcanoes in the western portion of the Mexican Volcanic Belt. Contrasts in eruptive style and mineralogy indicate that magmas from Colima are significantly more hydrous. Eruptions at Colima are commonly explosive, and the volcano is blanketed by a thick sequence of pyroclastic deposits. In contrast, only one major pyroclastic eruption is known for Ceboruco. Hornblende is a common mineral at Colima, but is extremely rare at Ceboruco. These volcanoes also display strong contrasts in whole-rock, mineral, and groundmass compositions. This study compares pre-eruptive temperatures, oxygen fugacities, and water contents calculated for andesites-dacites from Colima and Ceboruco, along with published whole-rock chemical compositions. Temperatures were estimated from pyroxene thermometry, oxygen fugacities were inferred from whole-rock Fe2O3/FeO values, and water contents were calculated from plagioclase-groundmass compositional relationships. At a given whole-rock SiO2 content, magmas from Ceboruco have significantly higher pre-eruptive temperatures and significantly lower water contents. The Ceboruco magmas are also less oxidized, with calculated oxygen fugacities about 1 log unit f(O2) below those for Colima. At a given SiO2 content, whole-rock samples from Ceboruco are strongly enriched in Ti, K, P, Rb, Zr, Ba, La, Yb, Hf, Th, U, and other incompatible trace elements compared to samples from Colima, but the latter have higher values of many ratios that are diagnostic of subduction-zone magmas: Ba/La, Sr/La, K/La, Rb/La, K/Th, and K/Ti. Thus, water does not behave as an incompatible ''clement'' in these systems. The source regions for magmas from both Colima and Ceboruco are presumed to lie in the mantle wedge above the subducting slab. The differences between these two volcanoes indicate that the mantle wedge beneath Colima is more strongly affected by fluids rising from the slab; perhaps because Colima lies closer to the trench than any other Mexican volcano. The mantle wedge beneath Colima is apparently strongly ''polluted'' by K, Ba, Sr, and Rb relative to other elements, and strongly hydrated, which leads to higher percentages of partial melting compared to the Ceboruco source. Consequently, the parental melts to the Colima suite have relatively lower absolute abundances of incompatible elements, but higher ratios of K, Ba, Sr, and Rb to La, Th, Ti and other elements. The higher melt fractions in the Colima source region are also evident in the considerably higher magmatic eruption rate compared to Ceboruco, and the hydrous nature of the Colima magmas is manifested in the abundance of hornblende and frequency of explosive eruptions. The higher temperatures of Ceboruco magmas probably reflect relatively greater depths to the slab and the overlying mantle source region. RP LUHR, JF (reprint author), SMITHSONIAN INST,DEPT MINERAL SCI,NHB-119,WASHINGTON,DC 20560, USA. NR 50 TC 71 Z9 71 U1 0 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-0273 J9 J VOLCANOL GEOTH RES JI J. Volcanol. Geotherm. Res. PD DEC PY 1992 VL 54 IS 1-2 BP 1 EP 18 DI 10.1016/0377-0273(92)90111-P PG 18 WC Geosciences, Multidisciplinary SC Geology GA KK636 UT WOS:A1992KK63600001 ER PT J AU RAYMOND, P AF RAYMOND, P TI THE IMPACT OF A TELEVISED TRIAL ON INDIVIDUALS INFORMATION AND ATTITUDES SO JUDICATURE LA English DT Article AB Viewers of a televised trial became more knowledgeable about the judicial process. And, despite the fact that they viewed a trial in which a poor person lost to a large corporation, they did not become less confident in the courts nor less willing to utilize the judicial system in the future. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,DEPT POLIT SCI,CAMBRIDGE,MA 02138. NR 18 TC 4 Z9 4 U1 0 U2 1 PU AMERICAN JUDICATURE SOCIETY PI CHICAGO PA 180 N MICHIGAN AVE, SUITE 600, CHICAGO, IL 60601-7401 SN 0022-5800 J9 JUDICATURE JI Judicature PD DEC-JAN PY 1992 VL 75 IS 4 BP 204 EP 209 PG 6 WC Law SC Government & Law GA KF847 UT WOS:A1992KF84700010 ER PT J AU ROBERTSON, DR AF ROBERTSON, DR TI PATTERNS OF LUNAR SETTLEMENT AND EARLY RECRUITMENT IN CARIBBEAN REEF FISHES AT PANAMA SO MARINE BIOLOGY LA English DT Article ID GREAT BARRIER-REEF; JUVENILE MORTALITY; LARVAL SETTLEMENT; HAEMULON-FLAVOLINEATUM; INITIAL SETTLEMENT; CORAL; VARIABILITY; CONSEQUENCES; POPULATIONS; DAMSELFISH AB Lunar patterns of settlement of 15 Caribbean reef fishes were assessed from daily collections of newly arrived fishes from each of two small (A = 63 and B = 28 m2) patch reefs at Punta de San Blas (Panama) during two consecutive 2 yr periods (1984, 1985 and 1986, 1987). In 12 species settlement was lunar-cyclic, with a broad peak of activity around the new moon in 11 cases, and at first quarter in 1 species. However, 3 of these "lunar-cyclic" species displayed intermittent semilunar periodicity in settlement, with peaks around the quarter moons. One other species had a semilunar cycle of settlement with peaks at both quarter moons. Two species apparently lacked lunar settlement cycles. In some, but not all, pairs of congeners: (a) monthly variation in settlement intensity was positively correlated, (b) the duration of settlement pulses in the same month consistently differed, and (c) the timing of settlement pulses in the same month often differed (although one species did not consistently arrive before the other). Recruitment of juvenile fish that survived to the end of the lunar cycle in which they settled was monitored monthly, concurrently with settlement, at a number of large sites scattered up to 2 km apart. The levels of variation in the amount of settlement and recruitment each month differed in only 2 of 17 cases, with settlement variation exceeding recruitment variation in only one of these. The intensity of recruitment was positively correlated with the intensity of settlement in 16 of 17 cases. In 15 of those 16 cases, R2 values for linear regressions of recruitment on settlement exceeded R2 values for curvilinear regressions that would indicate either increasing or decreasing recruitment success with increasing intensity of settlement. Thus it appears that variation in recruitment can be used to estimate variation in settlement, and that recruitment success may be density-independent. RP SMITHSONIAN TROP RES INST, UNIT 0948, APO AA 34003-0948, BALBOA, PANAMA. NR 47 TC 86 Z9 87 U1 0 U2 7 PU SPRINGER HEIDELBERG PI HEIDELBERG PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY SN 0025-3162 EI 1432-1793 J9 MAR BIOL JI Mar. Biol. PD DEC PY 1992 VL 114 IS 4 BP 527 EP 537 DI 10.1007/BF00357250 PG 11 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA KB478 UT WOS:A1992KB47800002 ER PT J AU MARVIN, UB KRING, DA AF MARVIN, UB KRING, DA TI AUTHENTICATION CONTROVERSIES AND IMPACTITE PETROGRAPHY OF THE NEW QUEBEC CRATER SO METEORITICS LA English DT Article ID MELT ROCKS; RECORD AB A meteoritic origin was proposed for the New Quebec Crater in 1949 on the basis of an aerial photograph showing its unique circularity and raised rim amid Precambrian gneisses of the Canadian Shield. At that time, only those few craters associated with meteorites were generally accepted as of impact origin. When the earliest field expeditions failed to find meteorites or impact products, two leading meteoriticists, Frederick C. Leonard and Lincoln LaPaz, cited the ''Chubb'' Crater as a flagrant example for which claims of meteoritic origin were advanced without valid proof. They also listed the Lake Bosumtwi Crater in Ashanti (now Ghana) among crater-like features, clearly of non-meteoritic origin, misidentified as meteorite craters. Controversy over the origin these two craters continued for decades. In Part I of this paper, we trace the investigations that led to the current acceptance of New Quebec as an authentic impact crater. We note that, for reasons that are not entirely clear, a meteoritic origin for the New Quebec Crater achieved wider acceptance at an earlier date than for the Lake Bosumtwi Crater, where petrographic and chemical evidence is more abundant and compelling. In Part II, we describe the petrography of two impact melt samples from the New Quebec Crater and present new evidence on the degrees of shock metamorphism affecting the accessory minerals: apatite, sphene, magnetite and zircon. Zircon, in particular, shows a range from euhedral grains with no signs of alteration to those decomposed to baddeleyite plus silica. C1 UNIV ARIZONA,LUNAR & PLANETARY LAB,TUCSON,AZ 85721. RP MARVIN, UB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 79 TC 11 Z9 11 U1 0 U2 4 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD DEC PY 1992 VL 27 IS 5 BP 585 EP 595 PG 11 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KH005 UT WOS:A1992KH00500012 ER PT J AU RENGARAJAN, TN IYENGAR, KVK AF RENGARAJAN, TN IYENGAR, KVK TI ARE VIRGO CLUSTER SPIRALS DEFICIENT IN MOLECULAR GAS SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE GALAXIES-FUNDAMENTAL PARAMETERS; GALAXIES-INTERSTELLAR MATTER; GALAXIES-SPIRAL; RADIO LINES-MOLECULAR-INTERSTELLAR ID GLOBAL PARAMETERS; NEARBY GALAXIES; HI OBSERVATIONS; STAR-FORMATION; ATOMIC GAS; CATALOG AB An analysis is presented of the data on atomic and molecular gas for a sample of farinfrared/optically-selected galaxies observed by Young et al. The analysis based on this larger sample confirms the increase in the ratio of molecular hydrogen to galaxy mass as the latter increases. From a comparison of distance-independent normalized H-2 masses, it is concluded that there is a good indication of deficiency of H-2 in the Virgo galaxies as compared to the field (non-Virgo) galaxies. This deficiency of H-2 is also indirectly confirmed by the deficiency of far-infrared and Halpha luminosities, which correlate well with the mass of molecular hydrogen. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP RENGARAJAN, TN (reprint author), TATA INST FUNDAMENTAL RES,HOMI BHABHA RD,BOMBAY 400005,INDIA. NR 19 TC 13 Z9 13 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD DEC 1 PY 1992 VL 259 IS 3 BP 559 EP 562 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KA401 UT WOS:A1992KA40100018 ER PT J AU WINTER, K ZIEGLER, H AF WINTER, K ZIEGLER, H TI INDUCTION OF CRASSULACEAN ACID METABOLISM IN MESEMBRYANTHEMUM-CRYSTALLINUM INCREASES REPRODUCTIVE SUCCESS UNDER CONDITIONS OF DROUGHT AND SALINITY STRESS SO OECOLOGIA LA English DT Article DE CRASSULACEAN ACID METABOLISM; MESEMBRYANTHEMUM; REPRODUCTION; WATER STRESS; DELTA-C-13 VALUE ID CARBON-ISOTOPE DISCRIMINATION; CO2; TEMPERATURES; EXCHANGE; LEAVES; PLANTS; CAM; C-3 AB Mesembryanthemum crystallinum L., an inducible crassulacean acid metabolism (CAM) plant, was grown for approximately 5 weeks following germination in well-watered, non-saline soil in a controlled-environment chamber. During this time, plants were characterized by C3 photosynthetic carbon metabolism. After the initial 5 weeks, CAM was induced by a combination of high soil salinity and reduced soil water content. One group of plants was allowed to engage in CAM by being continuously exposed to normal CO2-containing air (about 350-400 ppm). A second group of plants was deprived of ambient CO2 each night (12 h dark period) until completion of their life cycle, thereby minimizing potential carbon gain via dark CO2 fixation. The capacity to express CAM under conditions of drought and salinity stress markedly improved reproductive success: plants kept in normal CO2-containing air produced about 10 times more seeds than plants kept in CO2-free air during dark periods. Seeds from plants deprived of ambient CO2 overnight had more negative delta-C-13 values than seeds from plants kept in normal air. C1 UNIV WURZBURG,LEHRSTUHL BOT 2,W-8700 WURZBURG,GERMANY. TECH UNIV MUNICH,INST BOT & MIKROBIOL,W-8000 MUNICH 2,GERMANY. RP WINTER, K (reprint author), SMITHSONIAN TROP RES INST,POB 2072,BALBOA,PANAMA. NR 18 TC 27 Z9 28 U1 1 U2 6 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD DEC PY 1992 VL 92 IS 4 BP 475 EP 479 DI 10.1007/BF00317838 PG 5 WC Ecology SC Environmental Sciences & Ecology GA KH024 UT WOS:A1992KH02400003 PM 28313217 ER PT J AU BURNHAM, RJ WING, SL PARKER, GG AF BURNHAM, RJ WING, SL PARKER, GG TI THE REFLECTION OF DECIDUOUS FOREST COMMUNITIES IN LEAF LITTER - IMPLICATIONS FOR AUTOCHTHONOUS LITTER ASSEMBLAGES FROM THE FOSSIL RECORD SO PALEOBIOLOGY LA English DT Article ID RAIN-FOREST; FALL; AGE; PALEOECOLOGY; TAPHONOMY; DEPOSITS; BIOMASS; DELTA; BASIN; LAKE AB To assess the degree to which forest litter reflects the source forest, three 1-ha plots of temperate deciduous forest were mapped and litter accumulating in these forests was sampled. Identity, position, and diameter of all stems 2 cm or larger diameter at breast height are known for each forest. Composition of the leaf litter is governed by two key factors: (1) abscised leaves are deposited primarily on the forest floor directly underneath the canopy that produced them, and (2) the leaf mass of a species is highly correlated with its stem cross-sectional area. These factors produce autochthonous litter samples that correspond closely in composition to the forest within a circle of canopy-height radius or less. Even relatively small litter samples (350 leaves) consistently contained all the common species in the local area. However, the rarer tree species were seldom recovered in the litter samples. Correlation coefficients for litter mass and basal area by species are typically over .80. These observations have three important implications for interpreting autochthonous compression-fossil assemblages. First, approximate relative abundances of locally dominant and subdominant forest taxa can be obtained from relatively small samples of autochthonous compression-fossil assemblages. Second, representation of rare forest species, even in large fossil samples, will be fortuitous. For this reason, complete species lists and consistent estimates of richness cannot be derived directly from most existing samples of autochthonous compression-fossil assemblages. Third, the strong tendency for leaves to fall beneath the canopy of the tree that sheds them suggests that properly sampled autochthonous fossil leaf assemblages may yield information on crown size of individual trees and the spatial distribution of individuals and species, aspects of vegetational structure that have been thought accessible only in well-preserved "fossil forests" with standing trunks. C1 NATL MUSEUM NAT HIST,DEPT PALEOBIOL,WASHINGTON,DC 20560. SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. OI Wing, Scott/0000-0002-2954-8905 NR 46 TC 101 Z9 103 U1 2 U2 11 PU PALEONTOLOGICAL SOC INC PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044 SN 0094-8373 J9 PALEOBIOLOGY JI Paleobiology PD WIN PY 1992 VL 18 IS 1 BP 30 EP 49 PG 20 WC Biodiversity Conservation; Ecology; Evolutionary Biology; Paleontology SC Biodiversity & Conservation; Environmental Sciences & Ecology; Evolutionary Biology; Paleontology GA HJ832 UT WOS:A1992HJ83200003 ER PT J AU JAMIESON, MJ DALGARNO, A YUKICH, JN AF JAMIESON, MJ DALGARNO, A YUKICH, JN TI ELASTIC-SCATTERING OF HYDROGEN-ATOMS AT LOW-TEMPERATURES SO PHYSICAL REVIEW A LA English DT Article ID ELECTRONIC GROUND-STATE; POTENTIAL-ENERGY CURVE; VIBRATIONAL ENERGIES; COLLISIONS; MOLECULE; GAS AB The elastic scattering of two hydrogen atoms interacting at very small energies is explored numerically using the most accurate potential-energy curves available for the X1SIGMA(g)+ and b3SIGMA(u)+ states of H-2. The scattering lengths and low-temperature-averaged cross sections are determined and compared with previous calculations. The scattering lengths are 0.41a0 for the singlet case and 1.91a0 for the triplet. The predicted total triplet cross section at 2 K is 5.5 X 10(-15) cm2 but it could be lower, at 4.8 X 10(-15) cm2, with a different fit to the triplet potential between 12a0 and 15a0. A more accurate triplet-state potential is needed at these separations. C1 UNIV GLASGOW,DEPT COMP SCI,GLASGOW G12 8QQ,SCOTLAND. RP JAMIESON, MJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 31 TC 36 Z9 37 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD DEC 1 PY 1992 VL 46 IS 11 BP 6956 EP 6961 DI 10.1103/PhysRevA.46.6956 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KB946 UT WOS:A1992KB94600028 ER PT J AU ESCALANTE, V VICTOR, GA AF ESCALANTE, V VICTOR, GA TI EFFECTIVE RADIATIVE RECOMBINATION COEFFICIENTS OF ATOMIC OXYGEN SO PLANETARY AND SPACE SCIENCE LA English DT Article ID SINGLY IONIZED NITROGEN; OSCILLATOR-STRENGTHS AB Effective radiative recombination coefficients are calculated for atomic oxygen using an atomic model potential to obtain accurate non-hydrogenic transition probabilities of singly excited states. Results are presented for many lines for temperatures up to 3000 K. Simple analytic fits are given which are accurate for most lines. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA 02138 USA. RP NATL AUTONOMOUS UNIV MEXICO, INST ASTRON, AP POSTAL 70-264, CIUDAD UNIV MEXICO, MEXICO CITY 04510, DF, MEXICO. NR 18 TC 21 Z9 21 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD DEC PY 1992 VL 40 IS 12 BP 1705 EP 1717 DI 10.1016/0032-0633(92)90127-A PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG028 UT WOS:A1992KG02800011 ER PT J AU JAMIESON, MJ FINCH, M FRIEDMAN, RS DALGARNO, A AF JAMIESON, MJ FINCH, M FRIEDMAN, RS DALGARNO, A TI COLLISIONAL EXCITATION OF METASTABLE OXYGEN O(1D) ATOMS THROUGH THE B3-SIGMA-U- CHANNEL OF O-2 SO PLANETARY AND SPACE SCIENCE LA English DT Article ID RUNGE ABSORPTION-BANDS; PREDISSOCIATION LINEWIDTHS; O2; O(D-1); O(P-3) AB Spectroscopic data on the shifts and widths of the energy levels of molecular oxygen have been used in the empirical construction of a diabatic potential matrix that characterizes the interactions of the B3SIGMA(u)- state with the 5PI(u), 2(3)SIGMA(u)+, 3PI(u) and 1PI(u) states. The diabatic potential matrix is used here in a scattering theory formulation to calculate the cross-sections for the excitation of O(1D) atoms in collisions of two O(3P) atoms. Total cross-sections are obtained by adding the excitation from the 3PI(g) channel. The rate coefficient for quenching of O(1D) by O(3P) is evaluated as a function of temperature. The values conflict with a recent analysis of the emission of the oxygen red line in the upper atmosphere. C1 UNIV GLASGOW,DEPT COMP SCI,GLASGOW G12 8QQ,SCOTLAND. GEORGIA INST TECHNOL,DEPT PHYS,ATLANTA,GA 30332. INDIANA UNIV PURDUE UNIV,DEPT CHEM,FT WAYNE,IN 46805. RP JAMIESON, MJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 16 TC 9 Z9 9 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD DEC PY 1992 VL 40 IS 12 BP 1719 EP 1721 DI 10.1016/0032-0633(92)90128-B PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG028 UT WOS:A1992KG02800012 ER PT J AU MILONE, AAE AF MILONE, AAE TI THE BLUE STRAGGLERS OF M67 AND OTHER OPEN CLUSTERS SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article C1 HARVARD SMITHSONIAN CTR ASTROPHYS,DIV OPT & INFRARED ASTRON,CAMBRIDGE,MA 02138. NR 0 TC 7 Z9 7 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD DEC PY 1992 VL 104 IS 682 BP 1268 EP 1268 DI 10.1086/133120 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KF116 UT WOS:A1992KF11600022 ER PT J AU STANLEY, DJ WARNE, AG DAVIS, HR BERNASCONI, MP CHEN, ZY AF STANLEY, DJ WARNE, AG DAVIS, HR BERNASCONI, MP CHEN, ZY TI NILE DELTA SO RESEARCH & EXPLORATION LA English DT Article ID HOLOCENE SEQUENCES; EGYPT; EVOLUTION; STRATIGRAPHY; SUBSIDENCE; MINERALS; DEPOSITS; HISTORY; RECORDS; FLOODS AB On the basis of petrological and faunal analyses of 25 radiocarbon-dated cores, we interpret the late Quaternary evolution of the north-central Nile delta, Egypt. Evolution of the Nile delta between Manzala and Burullus lagoons results from the interplay of eustatic (sea-level), subsidence, paleoclimate, sediment-transport processes, and human intervention. The variation in Holocene lithofacies across the region results primarily from differential subsidence rates, possibly associated with offset along the Damietta-Latakia fault system. Littoral and eolian transport of eroded promontory sediments to the southeast gave rise to extensive coastal dune fields. These near-continuous dunes act as a natural dam that prevents marine inundation of interdune lows and subsequent development of lagoons in this region. These dune fields, which have recently buried lagoons, are expanding onto much-needed cultivated land. C1 SMITHSONIAN INST,US NATL MUSEUM NAT HIST,MEDITERRANEAN BASIN PROGRAM,WASHINGTON,DC 20560. US EPA,WASHINGTON,DC 20460. UNIV CALLABRIA,DIPARTIMENTO SCI TERRA,I-87036 ARCAVACATA,ITALY. NR 78 TC 3 Z9 3 U1 1 U2 2 PU NATL GEOGRAPHIC SOC PI WASHINGTON PA 17TH AND M STS NW, WASHINGTON, DC 20036 SN 8755-724X J9 RES EXPLOR JI Res. Explor. PD WIN PY 1992 VL 8 IS 1 BP 22 EP 51 PG 30 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LD398 UT WOS:A1992LD39800005 ER PT J AU WOLDA, H SPITZER, K LEPS, J AF WOLDA, H SPITZER, K LEPS, J TI STABILITY OF ENVIRONMENT AND OF INSECT POPULATIONS SO RESEARCHES ON POPULATION ECOLOGY LA English DT Article DE POPULATION DYNAMICS; POPULATION TRENDS; ENVIRONMENTAL STABILITY; ABUNDANCE FLUCTUATIONS; LEPIDOPTERA; CZECH-REPUBLIC ID ABUNDANCE; TRENDS; FLUCTUATIONS; LEPIDOPTERA; NOCTUIDAE; PATTERNS; DYNAMICS AB The abundance of moths was monitored with light-traps in two sites in southern Bohemia, Ceske Budejovice for 22 years and in Cernis for 9 years. In these sites, that are vastly different in environmental stability and predictability, stability of insect populations was studied. The amplitude of fluctuations in abundance of the insect populations, as measured by the coefficient of variation (CV), varied a great deal between species so that there was a large overlap between the two sites. Nevertheless there was a highly significant tendency for species at Cernis, the more stable site, to have smaller values of CV, i.e., to be less fluctuating. Also in species co-occurring in the two sites, the CV at Cernis tended to be smaller. Trends in abundance of individual species over time, both increases and decreases, were common in both sites and did not differ between habitats. Environmental stability begets insect population stability in terms of the amplitude of the fluctuations, but trends in time occur irrespective of stability of the habitat. C1 SMITHSONIAN TROP RES INST, BALBOA, PANAMA. CZECHOSLOVAK ACAD SCI, INST ENTOMOL, CS-37005 CESKE BUDEJOVICE, CZECHOSLOVAKIA. CZECHOSLOVAK ACAD SCI, DEPT BIOMATH, CS-37005 CESKE BUDEJOVICE, CZECHOSLOVAKIA. RI Leps, Jan/B-6913-2013; Spitzer, Karel/H-4096-2014 OI Leps, Jan/0000-0002-4822-7429; NR 23 TC 8 Z9 9 U1 2 U2 11 PU SPRINGER JAPAN KK PI TOKYO PA CHIYODA FIRST BLDG EAST, 3-8-1 NISHI-KANDA, CHIYODA-KU, TOKYO, 101-0065, JAPAN SN 0034-5466 J9 RES POPUL ECOL JI Res. Popul. Ecol. PD DEC PY 1992 VL 34 IS 2 BP 213 EP 225 DI 10.1007/BF02514794 PG 13 WC Ecology SC Environmental Sciences & Ecology GA KQ065 UT WOS:A1992KQ06500004 ER PT J AU GUZMAN, HM CORTES, J AF GUZMAN, HM CORTES, J TI COCOS ISLAND (PACIFIC OF COSTA-RICA) CORAL-REEFS AFTER THE 1982-83 EL-NINO DISTURBANCE SO REVISTA DE BIOLOGIA TROPICAL LA Spanish DT Article DE EASTERN PACIFIC; CORAL REEF; EL-NINO; COCOS ISLAND; RECOVERY AB Cocos Island coral reefs were adversely affected by the 1982-83 El Nino warming event. Surveys made in 1987 indicated dramatic coral mortality at all depths (1-24m). Live coral cover on three studied coral reefs was 2.6, 2.9 and 3.5%. Population densities of the corallivores Acanthaster planci and Arothron meleagris were relatively high with their feeding activities concentrated on the few surviving colonies. Density of Diadema mexicanum was also high, being responsible for the erosion of large reef framework areas. It is predicted that recovery of the original reef-framework thickness is in the order of centuries. RP GUZMAN, HM (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 0 TC 59 Z9 65 U1 1 U2 4 PU REVISTA DE BIOLOGIA TROPICAL PI SAN JOSE PA UNIVERSIDAD DE COSTA RICA CIUDAD UNIVERSITARIA, SAN JOSE, COSTA RICA SN 0034-7744 J9 REV BIOL TROP JI Rev. Biol. Trop. PD DEC PY 1992 VL 40 IS 3 BP 309 EP 324 PG 16 WC Biology SC Life Sciences & Biomedicine - Other Topics GA LJ411 UT WOS:A1992LJ41100004 ER PT J AU WINKER, K OEHLENSCHLAGER, RJ RAMOS, MA ZINK, RM RAPPOLE, JH WARNER, DW AF WINKER, K OEHLENSCHLAGER, RJ RAMOS, MA ZINK, RM RAPPOLE, JH WARNER, DW TI AVIAN DISTRIBUTION AND ABUNDANCE RECORDS FOR THE SIERRA-DE-LOS-TUXTLAS, VERACRUZ, MEXICO SO WILSON BULLETIN LA English DT Article ID SOUTHERN VERACRUZ AB Between 1973 and 1987 we spent more than 36 months studying birds in the Sierra de Los Tuxtlas, on the Gulf coast of southern Veracruz, Mexico. This area contains the northernmost tropical rainforest in the western hemisphere, and has undergone relatively rapid deforestation in the past three decades. Its avifauna is diverse, consisting of both resident and migratory birds. We recorded 405 species, including 58 that have not been reported from the region before, as well as several that apparently have not been reported for Veracruz. Fully 350 species are documented by specimens; the remaining 55 consist of sight records only. We compare our results with past surveys of Los Tuxtlas and discuss 124 species whose status in the region is affected by our data. Of the 405 species we recorded in Los Tuxtlas, 96 (23.7%) appear on a list of bird species from the northern neotropics thought to be in danger due to tropical deforestation. C1 NATL ZOOL PK,CONSERVAT & RES,FRONT ROYAL,VA 22630. SCI MUSEUM MINNESOTA,ST PAUL,MN 55101. WORLD BANK,DIV ENVIRONM ASSESSMENT & PROGRAMS,WASHINGTON,DC 20433. LOUISIANA STATE UNIV,MUSEUM NAT SCI,BATON ROUGE,LA 70803. RP WINKER, K (reprint author), UNIV MINNESOTA,JAMES FORD BELL MUSEUM NAT HIST,10 CHURCH ST SE,MINNEAPOLIS,MN 55455, USA. RI Winker, Kevin/M-2042-2014 OI Winker, Kevin/0000-0002-8985-8104 NR 34 TC 10 Z9 12 U1 0 U2 1 PU WILSON ORNITHOLOGICAL SOC PI ANN ARBOR PA MUSEUM OF ZOOLOGY UNIV MICHIGAN, ANN ARBOR, MI 48109 SN 0043-5643 J9 WILSON BULL JI Wilson Bull. PD DEC PY 1992 VL 104 IS 4 BP 699 EP 718 PG 20 WC Ornithology SC Zoology GA KH819 UT WOS:A1992KH81900009 ER PT J AU SADEGHPOUR, HR DALGARNO, A AF SADEGHPOUR, HR DALGARNO, A TI RAYLEIGH AND RAMAN-SCATTERING BY HYDROGEN AND CESIUM SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID ATOMS; IONIZATION AB An inhomogeneous differential equation method is used to calculate the Rayleigh and Raman scattering cross sections for atomic hydrogen and atomic caesium as functions of wavelength below and above the ionization limits. The profile of the scattering cross section near the 6s-6p resonance of atomic caesium is determined by including an energy-independent radiative width in the scattering formula. The effect of replacing the electric dipole operator by a modified form that takes account of the polarization of the core by the valence electron is explored. RP SADEGHPOUR, HR (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 22 TC 25 Z9 25 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD NOV 28 PY 1992 VL 25 IS 22 BP 4801 EP 4809 DI 10.1088/0953-4075/25/22/015 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KA750 UT WOS:A1992KA75000015 ER PT J AU OSTRO, SJ CAMPBELL, DB SIMPSON, RA HUDSON, RS CHANDLER, JF ROSEMA, KD SHAPIRO, II STANDISH, EM WINKLER, R YEOMANS, DK VELEZ, R GOLDSTEIN, RM AF OSTRO, SJ CAMPBELL, DB SIMPSON, RA HUDSON, RS CHANDLER, JF ROSEMA, KD SHAPIRO, II STANDISH, EM WINKLER, R YEOMANS, DK VELEZ, R GOLDSTEIN, RM TI EUROPA, GANYMEDE, AND CALLISTO - NEW RADAR RESULTS FROM ARECIBO AND GOLDSTONE SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID COHERENT BACKSCATTERING; SATELLITES; LIGHT; REFLECTIVITY; MEDIA; LOCALIZATION; EPHEMERIDES; SCATTERING; ECHOES; TITAN AB Observations of the icy Galilean satellites, conducted during 1987-1991 with the Arecibo 13-cm system and the Goldstone 3.5-an system, yield significant improvements in our knowledge of the satellites' radar properties. Hardly any wavelength dependence is seen for either the total power radar albedo sigma(T) or the circular polarization ratio mu(C). For Europa, Ganymede, and Callisto our 13-cm estimates of mean values and rms dispersions are sigma(T) = 2.60 +/- 0.22, 1.39 +/- 0.14, and 0.69 +/- 0.06; and mu(C) = 1.53 +/- 0.03, 1.43 +/- 0.06, and 1.17 +/- 0.04. Radar albedo features am seen on each satellite. Evidence for mu(C) features is lacking, except for indications of a weak hemispheric asymmetry for Callisto. That intersatellite and intrasatellite fractional variations in albedo greatly exceed variations in mu(C) is consistent with predictions of coherent backscatter theory and implies that albedo might be a crude indicator of relative silicate abundance. The satellites' albedo distributions overlap. The most prominent radar features are tentatively identified with Galileo Regio and the Valhalla basin. Estimates of echo Doppler frequencies show Callisto to be lagging its ephemeris by 200 +/- 50 km. C1 JET PROP LAB,PASADENA,CA 91109. CORNELL UNIV,NATL ASTRON & IONOSPHERE CTR,ITHACA,NY 14853. STANFORD UNIV,CTR RADAR ASTRON,STANFORD,CA 94305. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. WASHINGTON STATE UNIV,SCH ELECT ENGN & COMP SCI,PULLMAN,WA 99164. NATL ASTRON & IONOSPHERE CTR,ARECIBO,PR 00613. NR 35 TC 64 Z9 64 U1 1 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD NOV 25 PY 1992 VL 97 IS E11 BP 18227 EP 18244 PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KU056 UT WOS:A1992KU05600001 ER PT J AU ZIMBELMAN, JR CRADDOCK, RA GREELEY, R KUZMIN, RO AF ZIMBELMAN, JR CRADDOCK, RA GREELEY, R KUZMIN, RO TI VOLATILE HISTORY OF MANGALA VALLES, MARS SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID MARTIAN TOPOGRAPHY; SURFACE PROPERTIES; WATER; RADAR AB Mangala Valles are unique among Martian outflow channels because they emanate from a point source determined by the interaction of tectonism, volcanism, and volatile migration. Present topography and morphology place constraints on the magnitude of the discharge into the channels, supporting a release of water which spanned from tens to thousands of days. The sequence of events associated with the release of volatiles in the southern (Proximal) reaches of Mangala Valles indicates that structural features around the source area played a crucial role in determining the location of the apparent source of volatile release onto the Martian surface. Postulated locations for storage of the water released into the Mangala Valles system include aquifer systems in the highlands south of the release point, within the layered flows of the Tharsis plains, and a surface lake in the Daedalia Planum area. Hydraulic conductivity within the aquifer could have inhibited a sudden release of all the stored water, lengthening the total discharge duration toward the longer time frame indicated above. Topographic and structural constraints favor groundwater flow from the Tharsis region, which may have manifested itself at the Mangala source area as an artesian flow. Fluid release into the Mangala Valles system likely included sheet flows and episodic surges of water resulting from temporary ice dams within the channel system and may have included releases from more than a single location. C1 SMITHSONIAN INST, CTR EARTH & PLANETARY SCI, NATL AIR & SPACE MUSEUM, MRC 315, WASHINGTON, DC 20560 USA. ARIZONA STATE UNIV, DEPT GEOL, TEMPE, AZ 85287 USA. RUSSIAN ACAD SCI, VERNADSKY INST, MOSCOW 117975, RUSSIA. RI Craddock, Robert/B-3884-2013 NR 36 TC 23 Z9 23 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9097 EI 2169-9100 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD NOV 25 PY 1992 VL 97 IS E11 BP 18309 EP 18317 PG 9 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KU056 UT WOS:A1992KU05600008 ER PT J AU SUH, YB THIEN, LB ZIMMER, EA AF SUH, YB THIEN, LB ZIMMER, EA TI NUCLEOTIDE-SEQUENCES OF THE INTERNAL TRANSCRIBED SPACERS AND 5.8S RIBOSOMAL-RNA GENE IN CANELLA-WINTERANA (MAGNOLIALES, CANELLACEAE) SO NUCLEIC ACIDS RESEARCH LA English DT Note ID RIBOSOMAL DNA; RNA GENE; REGION; RDNA C1 TULANE UNIV,DEPT CELL & MOLEC BIOL,NEW ORLEANS,LA 70118. RP SUH, YB (reprint author), SMITHSONIAN INST,MOLEC SYSTEMAT LAB,WASHINGTON,DC 20560, USA. NR 12 TC 20 Z9 25 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD NOV 25 PY 1992 VL 20 IS 22 BP 6101 EP 6102 DI 10.1093/nar/20.22.6101 PG 2 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KB049 UT WOS:A1992KB04900031 PM 1461743 ER PT J AU LONG, KS BLAIR, WP VANCURA, O BOWERS, CW DAVIDSEN, AF RAYMOND, JC AF LONG, KS BLAIR, WP VANCURA, O BOWERS, CW DAVIDSEN, AF RAYMOND, JC TI SPECTROSCOPY OF A BALMER-DOMINATED FILAMENT IN THE CYGNUS LOOP WITH THE HOPKINS ULTRAVIOLET TELESCOPE SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (CYGNUS LOOP); SHOCK WAVES; SUPERNOVA REMNANTS; ULTRAVIOLET, INTERSTELLAR ID KEPLERS SUPERNOVA REMNANT; RADIATIVE SHOCK-WAVES; OPTICAL-EMISSION; NOVA REMNANTS; SPECTRUM; IDENTIFICATION; MODELS; LINE; GAS AB We have obtained a fair ultraVIolet spectrum of a nonradiative filament in the Cygnus Loop covering the wavelength range 830-1860 angstrom at 3.5 angstrom resolution using the Hopkins UltraVIolet Telescope on the Astro-1 space shuttle mission. The spectrum shows strong emission lines of high-ionization species, including 0 VI lambdalambda1032, 1038, N V lambdalambda1239, 1243, O V lambda1371, C IV lambdalambda1548, 1551, and He II lambda1640, as well as fainter lines never before seen in nonradiatIVe shock spectra. The 0 VI doublet is of particular interest because it comes from a hotter region in the postshock flow than other UV lines and because the doublet ratio can be used to assess the amount of resonant line scattering at this position. We calculate nonradiatIVe shock models which include a more sophisticated treatment of Lyman line transfer. We find that the HUT spectrum can be explained in terms of a shock with velocity 175-185 km s-1 propagating into a low-density medium. This shock velocity can be reconciled with the approximately 135 km s-1 width of the broad component of Halpha in this filament if equilibration of the postshock electron and ion temperatures proceeds much more rapidly than Coulomb equilibration timescales. However, the time required for a 180 km s-1 shock to develop a partial recombination zone is short, approximately 200 yr if n approximately 2 cm-3. This suggests that the shock is decelerating as it encounters denser material. Therefore, we have also developed a simple model in which the shock has decelerated rapidly from approximately 200 km s-1 to approximately 130 km s-1. This model can match the Halpha line width and the O VI:N V line ratio assuming that only Coulomb collisions transfer energy from ions to electrons, but it does not match the rest of the HUT spectrum as well as a single velocity and rapid equilibration. Although more sophisticated modeling is needed, the current analysis clearly favors rapid equilibration of electrons and ions behind the shock. C1 JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,CTR ASTROPHYS SCI,BALTIMORE,MD 21218. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP LONG, KS (reprint author), SPACE TELESCOPE SCI INST,3700 SAN MARTIN DR,BALTIMORE,MD 21218, USA. NR 48 TC 54 Z9 54 U1 0 U2 0 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 20 PY 1992 VL 400 IS 1 BP 214 EP & DI 10.1086/171988 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JX147 UT WOS:A1992JX14700021 ER PT J AU RIX, HW FRANX, M FISHER, D ILLINGWORTH, G AF RIX, HW FRANX, M FISHER, D ILLINGWORTH, G TI NGC-4550 - A LABORATORY FOR TESTING GALAXY FORMATION SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, EVOLUTION; GALAXIES, FORMATION; GALAXIES, INDIVIDUAL, NGC-4550; GALAXIES, KINEMATICS AND DYNAMICS ID ELLIPTICAL GALAXIES; VELOCITY DISPERSION; DISK; ROTATION AB We present long-slit spectroscopy of the E7/S0 galaxy NGC 4550, recently discovered by Rubin et al. to have cospatial, counterrotating components. A detailed analysis of the line-of-sight velocity distribution (LOSVD) along the major axis shows striking bimodality. This bimodal LOSVD indicates the presence of two disk components, photometrically inseparable, but counterstreaming at projected velocities of -110 km s-1 and +150 km s-1; they have projected velocity dispersions of approximately 60 km s-1 and approximately 45 km s-1, respectively. Both components have exponential brightness profiles with nearly identical luminosities and scale lengths. Each component by itself resembles kinematically "normal" S0 disks at one scale length. The bulge of NGC 4550 is found to contain only approximately 15% of the light. We discuss possible formation scenarios for the two disks and argue against a dissipationless formation through a merger. A formation of the second disk component through later addition of gas is conceivable, but must occur adiabatically. A halo, contributing 55% of the mass at the half-light radius, is required to reduce the adiabatic compression of the preexisting disk, which would move the galaxy off its normal locus in the Tully-Fisher relation. The present structure of NGC 4550 provides manifest proof that galaxy disks can absorb an amount of external material comparable to their own mass, without being heated dramatically. A combination of factors make NGC 4550 ideal for detecting counterstreaming disks, and the possibility of unnoticed stellar counterrotation in other, previously studied S0 disks is discussed. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. RP RIX, HW (reprint author), INST ADV STUDY,PRINCETON,NJ 08540, USA. NR 23 TC 120 Z9 120 U1 0 U2 1 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 20 PY 1992 VL 400 IS 1 BP L5 EP L8 DI 10.1086/186635 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JX148 UT WOS:A1992JX14800002 ER PT J AU ABBAS, MM TRAUB, WA AF ABBAS, MM TRAUB, WA TI STRATOSPHERIC MINOR CONSTITUENT DISTRIBUTIONS FROM FAR-INFRARED THERMAL EMISSION-SPECTRA SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID BALLOON INTERCOMPARISON CAMPAIGN; SINGLE-AXIS PLATFORM; WATER-VAPOR; PROFILES; SPECTROSCOPY; (H2O)-O-18 AB We retrieve mixing ratio profiles Of 03, (H2O)-O-16, (H2O)-O-17, (H2O)-O-18, HF, and HCI from far-infrared thermal emission observations of the limb in the 80-220 cm-1 spectral region. The observations were made with a balloon-borne Fourier transform spectrometer as a part of the 1983 Balloon Intercomparison Campaign (BIC-2). A subset of the data was analyzed previously using the method in the work of Traub et al. [1982, 1991]; in the present paper we use an alternative method of calibration and analysis, given by Abbas et al, [1985]. The retrieved constituent profiles are compared with the measurements made with other instruments on the BIC-2 flights. The results for the concentrations of (H2O)-O-17 and (H2O)-O-18 obtained in this study indicate no isotopic enhancement or depletion with a standard deviation of about 20%. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP ABBAS, MM (reprint author), NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,MAIL STOP ES 55,HUNTSVILLE,AL 35812, USA. NR 33 TC 5 Z9 5 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD NOV 20 PY 1992 VL 97 IS D16 BP 18035 EP 18045 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA JZ602 UT WOS:A1992JZ60200005 ER PT J AU VOLLRATH, F PARKER, GA AF VOLLRATH, F PARKER, GA TI SEXUAL DIMORPHISM AND DISTORTED SEX-RATIOS IN SPIDERS SO NATURE LA English DT Article AB SEXUAL dimorphism in body size is widespread in the animal kingdom. Whereas male giantism has been studied and explained extensively1,2, male dwarfism has not. Yet it is neither rare3-7 nor without theoretical interest8,9. Here we provide experimental and comparative data on spiders to support the theory that dwarf males are associated with high differential adult mortality, with males at much greater risk. Species with sedentary (low-risk) females have dwarf, roving (high-risk) males. Life-history theory could readily explain dwarfing if juvenile, but not adult, male mortality were large. We present a new model in which high mortality of searching mature males reduces the adult sex ratio (males: females), relaxing male-male competition and reducing the importance of male body size to favour dwarfing by early maturation. Early maturity also reduces male juvenile mortality and thus opposes adult mortality. This provides a mechanism that buffers skews in adult sex ratio and which is quite distinct from Fisher's principle10 and allied mechanisms9,11 for the primary sex ratio. C1 ZOOL INST,CH-4051 BASEL,SWITZERLAND. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. UNIV LIVERPOOL,DEPT ENVIRONM & EVOLUTIONARY BIOL,LIVERPOOL L69 3BX,ENGLAND. RP VOLLRATH, F (reprint author), UNIV OXFORD,DEPT ZOOL,OXFORD OX1 3PS,ENGLAND. RI Parker, Geoff/C-4337-2008 OI Parker, Geoff/0000-0003-4795-6352 NR 34 TC 177 Z9 178 U1 5 U2 53 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD NOV 12 PY 1992 VL 360 IS 6400 BP 156 EP 159 DI 10.1038/360156a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JX752 UT WOS:A1992JX75200058 ER PT J AU HICKSON, P DEOLIVEIRA, CM HUCHRA, JP PALUMBO, GGC AF HICKSON, P DEOLIVEIRA, CM HUCHRA, JP PALUMBO, GGC TI DYNAMIC PROPERTIES OF COMPACT-GROUPS OF GALAXIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; GALAXIES, DISTANCES AND REDSHIFTS; GALAXIES, INTERSTELLAR MATTER; GALAXIES, LUMINOSITY FUNCTION; MASS FUNCTION ID SPIRAL GALAXIES; LUMINOSITY FUNCTION; DENSE GROUPS; MASS; KINEMATICS; REDSHIFTS; CATALOG AB We present radial velocities for 457 galaxies in the 100 Hickson compact groups. More than 84% of the galaxies measured have velocities within 1000 km s-1 of the median velocity in the group. Here 92 groups have at least three accordant members, and 69 groups have at least four. The radial velocities of these groups range from 1380 to 41,731 km s-1 with a median of 8889 km s-1, corresponding to a median distance of 89 h-1 Mpc. The redshift distribution of the groups is consistent with their having a uniform space distribution, and a luminosity function characterized by a Schechter function with M* = -20.6 and alpha = -0.2. The apparent space density of these systems ranges from 300 to as much as 10(8) h2 Mpc-2, which exceeds the densities in the centers of rich clusters. The median projected separation between galaxies is only 39 h-1 kpc, comparable to the sizes of the galaxies themselves. The median radial velocity dispersion is 200 km s-1, comparable to values reported for loose groups. This corresponds to an intrinsic three-dimensional velocity dispersion of 331 km s-1. The median galaxy crossing time ranges from 0.001H-0(-1) to 8.7H-0(-1) with a median of 0.016H-0(-1). A significant correlation is found between crossing time and the fraction of gas-rich galaxies in the groups, and a weak anticorrelation is found between crossing time and the luminosity contrast of the first-ranked galaxy. Derived mass-to-light ratios M/L for the groups range up to 10(3), with a median of 50 h. This is about 7 times the median M/L reported for individual galaxies in the groups and strongly suggests that as much as approximately 85% of the mass of a group, in the region interior to the galaxy orbits, consists of dark matter. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV BOLOGNA,DIPARTIMENTO ASTRON,I-40126 BOLOGNA,ITALY. RP HICKSON, P (reprint author), UNIV BRITISH COLUMBIA,DEPT GEOPHYS & ASTRON,2219 MAIN MALL,VANCOUVER V6T 1Z4,BC,CANADA. RI Mendes de Oliveira, Claudia/F-2391-2012 OI Mendes de Oliveira, Claudia/0000-0002-7736-4297 NR 64 TC 273 Z9 273 U1 0 U2 0 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 1992 VL 399 IS 2 BP 353 EP 367 DI 10.1086/171932 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV806 UT WOS:A1992JV80600003 ER PT J AU NARAYAN, R WALLINGTON, S AF NARAYAN, R WALLINGTON, S TI DETERMINATION OF LENS PARAMETERS FROM GRAVITATIONALLY LENSED GAMMA-RAY BURSTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE DARK MATTER; GAMMA-RAYS, BURSTS; GRAVITATIONAL LENSING ID LIGHT TRAVEL TIME; FERMAT PRINCIPLE; IMAGES; SYSTEM; MODELS; QUASAR; DELAY; CONSEQUENCES; DIFFERENCE AB We consider gravitational lensing of cosmologically distant gamma-ray bursts by foreground matter and investigate whether observations of such lensing events can be inverted to determine the characteristics of the lensing mass. In contrast to lensed quasars, observations of lensed gamma-ray bursts are unlikely to yield the positions of the individual images or the redshifts of the lens or the source. Instead, only the magnification ratios and relative time delays of the multiple, lensed bursts will be measured. Despite this severe limitation, quite interesting conclusions can be drawn about the lensing mass. For pointlike lenses, the quantity (1 + z(d))M can be calculated directly from the observables, yielding the lens mass to within a factor approximately 2. The mass determination is independent of the source redshift and the angular diameter distances to the source and the lens. Even if the point mass is embedded in a constant density mass sheet with shear it is still possible, in favorable cases, to estimate (1 + z(d))M directly from the observations. If the lens is not pointlike but has an extended mass distribution, the observations can be used to obtain the velocity dispersion of the lens. However, in this case it will be necessary to assume values for the various angular diameter distances involved. RP NARAYAN, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 40 TC 14 Z9 14 U1 0 U2 0 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 1992 VL 399 IS 2 BP 368 EP 372 DI 10.1086/171933 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV806 UT WOS:A1992JV80600004 ER PT J AU REMILLARD, RA MCCLINTOCK, JE BAILYN, CD AF REMILLARD, RA MCCLINTOCK, JE BAILYN, CD TI EVIDENCE FOR A BLACK-HOLE IN THE X-RAY BINARY NOVA MUSCAE-1991 SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, SPECTROSCOPIC; BLACK HOLE PHYSICS; X-RAYS, STARS ID LMC X-3; A0620-00; SPECTROPHOTOMETRY; SPECTRUM AB Optical photometry and spectroscopy of the X-ray Nova Muscae 1991 in quiescence reveal an orbital period of 10.398 +/- 0.014 hr and an absorption-line velocity curve consistent with a sinusoidal modulation at a half-amplitude of 409 +/- 18 km s-1. The spectral type of the secondary star is in the range K0 V to K4 V. The value of the mass function, 3.1 +/- 0.4 MD. is a conservative lower limit on the mass of the compact primary and suggests that the primary is a black hole. Further considerations of the binary inclination angle and the mass of the secondary strengthen the black hole model. The folded light curves in the I band and the B + V band resemble ellipsoidal variations, with an additional brightening near one of the maxima in the B + V band. The orbital period is 1.4% shorter than the photometric period observed during outburst, as expected if the outburst modulations are analogs of "superhumps" in dwarf novae. In quiescence, the optical properties of the X-ray binary Nova Muscae 1991 bear a striking resemblance to the black hole binary A0620-00 (Nova Mon 1917, 1975), which extends the basis of similarity that was demonstrated during outburst at X-ray and optical wavelengths. C1 MIT,CTR SPACE RES,CAMBRIDGE,MA 02139. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. YALE UNIV,DEPT ASTRON,NEW HAVEN,CT 06511. NR 30 TC 110 Z9 110 U1 0 U2 0 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 1992 VL 399 IS 2 BP L145 EP L149 DI 10.1086/186628 PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV811 UT WOS:A1992JV81100010 ER PT J AU STERN, RA SCHMITT, JHMM ROSSO, C PYE, JP HODGKIN, ST STAUFFER, JR AF STERN, RA SCHMITT, JHMM ROSSO, C PYE, JP HODGKIN, ST STAUFFER, JR TI 1ST RESULTS FROM ROSAT ALL-SKY SURVEY OBSERVATIONS OF THE HYADES CLUSTER SO ASTROPHYSICAL JOURNAL LA English DT Article DE OPEN CLUSTERS AND ASSOCIATIONS, INDIVIDUAL (HYADES); STARS, CORONAE; X-RAYS, STARS ID X-RAY SURVEY; PHOTOMETRY; DISTANCE; GIANTS; DWARFS; STARS AB We present preliminary ROSAT all-sky survey results for the Hyades cluster. We detected 108 Hyades cluster members as X-ray sources with L(x) greater-than-or-similar to 3 x 10(28) ergs s-1. A number of short-period, chromospherically active binary systems and the giants theta1 Tau and gamma Tau are among the most X-ray-luminous objects in the cluster. The second brightest X-ray source, HR 1394 = 71 Tau = VB 141, is a long-period lunar occultation binary. Seven cluster members were also seen in the Wide Field Camera extreme-ultraviolet (EUV) all-sky survey. Among the stars detected in both X-rays and EUV is the Hyades white dwarf EG 37 (= VR 16), confirming an earlier serendipitous EXOSAT detection. We also report the first X-ray detection of the Hyades K0 giant epsilon Tau, at roughly the survey limit. This new result establishes all four Hyades giants as X-ray emitters, although with an almost-equal-to 50:1 range in L(x). A comparison of Einstein and ROSAT data for three of the giants suggests that long-term X-ray variability, perhaps due to activity cycles, may be partly responsible for the wide dispersion in L(x). C1 MAX PLANCK INST EXTRA TERR PHYS,W-8046 GARCHING,GERMANY. UNIV LEICESTER,DEPT PHYS & ASTRON,LEICESTER LE1 7RH,ENGLAND. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP STERN, RA (reprint author), LOCKHEED PALO ALTO RES LABS,SOLAR & ASTROPHYS LAB,0-91-30,BLDG 252,3251 HANOVER ST,PALO ALTO,CA 94304, USA. NR 29 TC 35 Z9 35 U1 0 U2 0 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 1992 VL 399 IS 2 BP L159 EP L162 DI 10.1086/186631 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV811 UT WOS:A1992JV81100013 ER PT J AU DAVIS, JL AF DAVIS, JL TI THE EFFECT OF TURBULENCE ON ATMOSPHERIC GRADIENT PARAMETERS ESTIMATED FROM GROUND-BASED RADIOMETRIC AND SPACE GEODETIC MEASUREMENTS SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID WET AB Spatial and temporal fluctuations in the refractive index of air affect estimates of atmospheric parameters determined from data obtained from radio signals which have propagated through the atmosphere. These effects will become increasingly important as we continue to improve the accuracy of microwave space geodetic techniques. Using a straightforward expression for the covariance of a general vector of atmospheric parameters, I calculate the effects on estimates of spatial gradients for a frozen Kolmogorov turbulence field moving over a site at constant velocity. Numerical calculations are performed to investigate the implications for three techniques: ground-based microwave radiometry, geodesy with the Global Positioning System, and Very Long Baseline Interferometry. The results indicate that a prevailing wind with no true static gradients may give rise to apparent azimuthal asymmetries when gradient parameters are estimated. Moreover, care must be taken in comparing gradient parameters determined using data from these different techniques, because these techniques sample the atmosphere on different spatial and temporal scales. RP DAVIS, JL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Davis, James/D-8766-2013 OI Davis, James/0000-0003-3057-477X NR 5 TC 3 Z9 3 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD NOV 3 PY 1992 VL 19 IS 21 BP 2183 EP 2186 DI 10.1029/92GL02510 PG 4 WC Geosciences, Multidisciplinary SC Geology GA JY496 UT WOS:A1992JY49600020 ER PT J AU VENNUM, T AF VENNUM, T TI CHOCTAW MUSIC AND DANCE - HOWARD,JH, LEVINE,VL SO AMERICAN ETHNOLOGIST LA English DT Book Review RP VENNUM, T (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0094-0496 J9 AM ETHNOL JI Am. Ethnol. PD NOV PY 1992 VL 19 IS 4 BP 834 EP 836 PG 3 WC Anthropology SC Anthropology GA JY174 UT WOS:A1992JY17400021 ER PT J AU GRICE, JD DUNN, PJ AF GRICE, JD DUNN, PJ TI ATTAKOLITE - NEW DATA AND CRYSTAL-STRUCTURE DETERMINATION SO AMERICAN MINERALOGIST LA English DT Article AB Attakolite, a silico-phosphate mineral from the Vastana mine, Sweden, has been submitted to chemical and X-ray structure analysis in order to establish its crystal structure and chemical formula. The mineral is monoclinic, space group C2/m, with cell parameters refined from X-ray powder diffraction; a = 17.188(4), b = 11.477(8), c = 7.322(5) angstrom and beta = 113.8 3(4). Complete X-ray powder diffraction and optical data are given. An electron microprobe analysis gave SiO2 5.9, P2O5 33.6, Al2O3 26.8, Fe2O3 3.9, MnO 9.7, CaO 6.6, SrO 3.0, and H2O (difference) 10.5. This analysis in conjunction with the crystal-structure determination yields the simplest formula, (Ca,Sr)Mn(Al,Fe3+)4[HSiO4][PO4]3(OH)4, with Z = 4. The structure has been refined to R = 2.6% and R(w) = 2.3%. The layer composed of chains of [AlO4(OH)2] octahedra with independent [PO4] and [SiO3(OH)] tetrahedra in attakolite is compared with similar structural features in carminite, palermoite, tsumcorite, and the descloizite and adelite groups. As the silicate anion is a stronger Lewis base than the phosphate anion, it predictably is the hydrogenated anionic species. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. RP GRICE, JD (reprint author), CANADIAN MUSEUM NATURE,MINERAL SCI SECT,OTTAWA K1P 6P4,ON,CANADA. NR 17 TC 8 Z9 8 U1 0 U2 0 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD NOV-DEC PY 1992 VL 77 IS 11-12 BP 1285 EP 1291 PG 7 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA KD757 UT WOS:A1992KD75700015 ER PT J AU JENNIONS, MD BACKWELL, PRY AF JENNIONS, MD BACKWELL, PRY TI CHORUS SIZE INFLUENCES ON THE ANTIPREDATOR RESPONSE OF A NEOTROPICAL FROG SO ANIMAL BEHAVIOUR LA English DT Note ID BEHAVIOR C1 UNIV WITWATERSRAND,DEPT ZOOL,JOHANNESBURG 2001,SOUTH AFRICA. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RI Jennions, Michael/C-7560-2009; Backwell, Patricia/C-8883-2009 OI Jennions, Michael/0000-0001-9221-2788; NR 8 TC 18 Z9 19 U1 3 U2 3 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0003-3472 J9 ANIM BEHAV JI Anim. Behav. PD NOV PY 1992 VL 44 IS 5 BP 990 EP 992 DI 10.1016/S0003-3472(05)80596-2 PG 3 WC Behavioral Sciences; Zoology SC Behavioral Sciences; Zoology GA KF889 UT WOS:A1992KF88900021 ER PT J AU SMITH, GH DUPREE, AK CHURCHILL, CW AF SMITH, GH DUPREE, AK CHURCHILL, CW TI SPECTROSCOPY OF THE CA-II K-LINE OF METAL-POOR FIELD RED GIANTS .1. SOUTHERN-HEMISPHERE OBSERVATIONS SO ASTRONOMICAL JOURNAL LA English DT Article ID H-ALPHA EMISSION; MASS-LOSS; STARS; CHROMOSPHERES AB Spectra of the Ca II K line have been obtained for a sample of field metal-poor red giants. Strong chromospheric emission is found to be quite common among such giants of absolute magnitude brighter than M(V) approximately -0.3. The behavior of the violet/red asymmetry of the emission line profile shows no significant difference with that observed among Population I red giants, suggesting that the onset of material outflow is independent of metallicity. The Ca II emission is observed among giants more than one magnitude fainter than those which exhibit emission in the wings of the Halpha line. One possible interpretation of this result is that the transient phenomenon associated with the variable Halpha emission does not become established until a Population II giant attains luminosities considerably greater than those at which well-developed chromospheres are achieved. C1 UNIV CALIF SANTA CRUZ,UNIV CALIF OBSERV LICK OBSERV,SANTA CRUZ,CA 95064. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 21 TC 16 Z9 16 U1 0 U2 0 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 NOV PY 1992 VL 104 IS 5 BP 2005 EP 2015 DI 10.1086/116376 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV270 UT WOS:A1992JV27000025 ER PT J AU UITENBROEK, H BRULS, JHMJ AF UITENBROEK, H BRULS, JHMJ TI THE FORMATION OF HELIOSEISMOLOGY LINES .3. PARTIAL REDISTRIBUTION EFFECTS IN WEAK SOLAR RESONANCE LINES SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE SUN, ATMOSPHERE; RADIATIVE TRANSFER; LINE, FORMATION ID RADIATIVE-TRANSFER PROBLEMS; MODELS AB This paper investigates the formation of the Na I D2, K I lambda769.9 nm and Ba II lambda455.4 nm resonance lines in the solar atmosphere allowing for partial frequency redistribution (PRD). We show that the influence of PRD is negligible on the solar disk in all three lines for a model of the average quiet-Sun, and even for the more extreme case of a model with a steeper photospheric temperature decline. At the solar limb PRD does affect the intensity profile of the Na I and Ba II resonance lines, but not that of the K I line. Finally, we find that effects of PRD are more pronounced at the limb in the Na I D2 and Ba II lambda455.4 nm lines when the photospheric temperature gradient is steep. C1 STERREKUNDIG INST UTRECHT, 3508 TA UTRECHT, NETHERLANDS. RP UITENBROEK, H (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 37 TC 14 Z9 14 U1 0 U2 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 NOV PY 1992 VL 265 IS 1 BP 268 EP 277 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JX135 UT WOS:A1992JX13500031 ER PT J AU LACHIEZEREY, M DACOSTA, LN MAUROGORDATO, S AF LACHIEZEREY, M DACOSTA, LN MAUROGORDATO, S TI VOID PROBABILITY FUNCTION IN THE SOUTHERN SKY REDSHIFT SURVEY SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; METHODS, ANALYTICAL ID GALAXY DISTRIBUTION; SPATIAL CORRELATION; STATISTICS; SUPERCLUSTER; UNIVERSE AB We investigate the statistical properties of the distribution of galaxies in the Southern Sky Redshift Survey (SSRS) utilizing the J3 integral and the void probability function (VPF) to test for scaling relations, luminosity segregation, and possible variations with the depth of the sample. From the analysis of the southern sample, less sensitive to the flow model adopted to estimate galaxy distances, we confirm earlier claims for the existence of luminosity segregation. We also confirm that the VPF obeys a universal scaling relation, independent of sample depth and luminosity. However, comparison of the VPFs for volume-limited samples shows that larger voids occur more frequently in the southern hemisphere, probably indicating that the samples considered may not yet represent fair samples of the universe at large. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OBSERV NACL,BR-20921 RIO JANEIRO,BRAZIL. OBSERV PARIS,SECT MEUDON,DEPT ASTRON EXTRAGALACT & COSMOL,F-92195 MEUDON,FRANCE. RP LACHIEZEREY, M (reprint author), CENS,SERV ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. NR 23 TC 15 Z9 15 U1 0 U2 0 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 1 PY 1992 VL 399 IS 1 BP 10 EP 15 DI 10.1086/171897 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV047 UT WOS:A1992JV04700002 ER PT J AU GOODMAN, AA JONES, TJ LADA, EA MYERS, PC AF GOODMAN, AA JONES, TJ LADA, EA MYERS, PC TI THE STRUCTURE OF MAGNETIC-FIELDS IN DARK CLOUDS - INFRARED POLARIMETRY IN B216-217 SO ASTROPHYSICAL JOURNAL LA English DT Article DE DUST, EXTINCTION; ISM, CLOUDS; ISM, MAGNETIC FIELDS; POLARIZATION ID TAURUS MOLECULAR CLOUDS; POLARIZATION; OPHIUCHUS; EVOLUTION; REGIONS AB We present a near-infrared polarization map of background starlight seen through the B216-217 dark cloud in Taurus. The mean direction and dispersion in direction of the polarization vectors observed in the near-infrared are indistinguishable from the direction and dispersion of optical polarization vectors around the periphery of the dark cloud. Measurements of J- and K-magnitudes of the stars observed in the near-infrared imply a range of extinctions 1 less than or similar to A(V) less than or similar to 10 mag, while the mean A(V) for the stars whose polarization has been measured optically is less than or similar to 1 mag. Assuming that grains in the high- and low-density regions are similar, and are similarly aligned by magnetic fields, then unless the field becomes significantly more nonuniform in denser regions, our results imply that the dark cloud has no effect on the projected direction of the magnetic field. If the field does become more nonuniform in the denser portions of the cloud, then the dark cloud is associated with a change in the total energy of the field, but not with any change in the mean direction of the field. Yet, we also find that the degree of polarization in B216-217 and other dark clouds increases more slowly with extinction than expected: if this reduction in polarization efficiency is caused by a drop in alignment and/or polarizing efficiency in denser regions, it is possible that near-infrared polarization may be relatively insensitive to the field direction in the dense interior of dark clouds. C1 UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RI Goodman, Alyssa/A-6007-2010 OI Goodman, Alyssa/0000-0003-1312-0477 NR 22 TC 59 Z9 59 U1 0 U2 0 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 1 PY 1992 VL 399 IS 1 BP 108 EP 113 DI 10.1086/171907 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV047 UT WOS:A1992JV04700012 ER PT J AU SOKER, N AF SOKER, N TI EXCITATION OF GRAVITY-WAVES IN COMMON ENVELOPES SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, CLOSE; GRAVITATION; STARS, INTERIORS; STARS, LATE-TYPE; STARS, LOW-MASS, BROWN DWARFS ID DOUBLE-CORE EVOLUTION; STAR-PLANET SYSTEMS; CATACLYSMIC BINARIES; RED GIANT; NEBULAE; PROGENITORS AB We study the excitation of gravity waves by a low-mass companion orbiting inside the envelope of a giant star, concentrating on brown dwarfs inside the envelope of asymptotic giant branch stars. Efficient g-wave excitations occur only after the brown dwarf has spiraled-in to the radiative zone, well inside the envelope, of the asymptotic giant branch star. The brown dwarf excites g-waves when its orbital radius is r2 congruent-to 3-10 R.. At this stage of the evolution the envelope mass is below 0.1 M.. The g-waves propagate inward from the secondary orbit, carrying angular momentum and energy. We find that the angular momentum transport leads to an efficient spin-up of the inner envelopes. The differential rotation between the envelope and core and nonlinear wave effects, can cause a mixing of heavy elements from the core to the envelope. RP SOKER, N (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 30 TC 5 Z9 5 U1 0 U2 0 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 1 PY 1992 VL 399 IS 1 BP 185 EP 191 DI 10.1086/171915 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV047 UT WOS:A1992JV04700020 ER PT J AU MORSE, JA HARTIGAN, P CECIL, G RAYMOND, JC HEATHCOTE, S AF MORSE, JA HARTIGAN, P CECIL, G RAYMOND, JC HEATHCOTE, S TI THE BOW SHOCK AND MACH DISK OF HH 34 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, KINEMATICS AND DYNAMICS; STARS, ISM, MAGNETIC FIELDS; SHOCK WAVES; STARS INDIVIDUAL (HH 34); STARS, PRE-MAIN-SEQUENCE ID HERBIG-HARO OBJECTS; ENERGY-SOURCE; YOUNG STARS; JET; MODELS; COMPLEX; FIELD; HH-34; WAVES AB We have used the Rutgers/CTIO imaging Fabry-Perot interferometer to acquire spatially resolved line profiles across the bow shock and Mach disk of the Herbig-Haro object HH 34 in [O III] lambda5007, Halpha, and [S II] lambdalambda6716, 6731. Profiles were obtained with approximately 1"5 spatial and 35 km s-1 FWHM velocity resolution. We have separated the Mach disk emission in this outflow from the bow shock emission both spatially and kinematically. Our observations provide the first detailed kinematic information about the shocked material behind the Mach disk of a stellar jet. The preshock gas to the south of HH 34 must flow outward at approximately 150 km s-1 with respect to the stellar energy source to account for the observed kinematics of the line emission in HH 34. Hence, HH 34 is probably a secondary ejection that moves into the outflowing wake of an earlier ejection, a scenario also proposed by Heathcote & Reipurth to explain proper motions in HH 34. Our new measurements of the electron density as a function of position and velocity, combined with new models of the bow shock emission, show that the magnetic field inhibits the compression of the post-bow shock gas. We estimate the ambient magnetic field to be 10-20 muG in front of HH 34. The magnetic energy density in the preshock gas is less than 10(-3) of the ram pressure, which implies that the magnetic field is not important in the flow dynamics of HH 34. By balancing the ram pressures in the bow shock and Mach disk, we estimate the jet-to-ambient density ratio eta approxiamtely 10. This is approximately 10 times higher than previous estimates for eta in this outflow. C1 UNIV N CAROLINA,DEPT PHYS & ASTRON,CHAPEL HILL,NC 27599. UNIV MASSACHUSETTS,DEPT ASTRON,AMHERST,MA 01003. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP MORSE, JA (reprint author), NATL OPT ASTRON OBSERV,CERRO TOLOLO INTERAMER OBSERV,CASILLA 603,LA SERENA,CHILE. NR 38 TC 91 Z9 91 U1 1 U2 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 NOV 1 PY 1992 VL 399 IS 1 BP 231 EP & DI 10.1086/171919 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV047 UT WOS:A1992JV04700024 ER PT J AU SAMS, BJ GOLUB, L WEISS, NO AF SAMS, BJ GOLUB, L WEISS, NO TI X-RAY OBSERVATIONS OF SUNSPOT PENUMBRAL STRUCTURE SO ASTROPHYSICAL JOURNAL LA English DT Article DE SUN, MAGNETIC FIELDS; SUN, X-RAYS, GAMMA RAYS; SUNSPOTS ID MAGNETIC-FIELDS AB High-resolution coronal observations with the Normal Incidence X-ray Telescope (NIXT) reveal previously unobserved structure in the magnetic fields above a sunspot. The X-ray images are precisely aligned with a continuum photospheric image taken at the same time. The X-ray brightness traces magnetic field lines and shows: (1) that none of the bright loops originate in the spot umbra and (2) that some field lines emerging from the inner penumbra connect to regions far away from the spot. Such large-scale structures must remain distinct from the shallowly inclined fields in the outer penumbra. In particular, they cannot be involved in any interchange between the bright and dark filaments. This imposes constraints on models of penumbral convection. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CAMBRIDGE,DEPT APPL MATH & THEORET PHYS,CAMBRIDGE CB3 9EW,ENGLAND. RP SAMS, BJ (reprint author), MAX PLANCK INST EXTRATERRESTR PHYS,GIESSENBACHSTR,W-8046 GARCHING,GERMANY. NR 19 TC 44 Z9 44 U1 0 U2 0 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 1 PY 1992 VL 399 IS 1 BP 313 EP & DI 10.1086/171926 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV047 UT WOS:A1992JV04700031 ER PT J AU STRAUSS, MA HUCHRA, JP DAVIS, M YAHIL, A FISHER, KB TONRY, J AF STRAUSS, MA HUCHRA, JP DAVIS, M YAHIL, A FISHER, KB TONRY, J TI A REDSHIFT SURVEY OF IRAS GALAXIES .7. THE INFRARED AND REDSHIFT DATA FOR THE 1.936 JANSKY SAMPLE SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE GALAXIES, DISTANCES AND REDSHIFTS; INFRARED, GALAXIES; SURVEYS ID PISCES-PERSEUS SUPERCLUSTER; RADIAL-VELOCITIES; NEUTRAL HYDROGEN; SPIRAL GALAXIES; DENSITY FIELDS; CATALOG AB We present the data for a redshift survey of galaxies selected from the data base of the Infrared Astronomical Satellite (IRAS). The sample is flux limited to 1.936 Jy at 60 mum and covers 11 .0 1 sr of the sky. It consists of 5014 objects, of which 2658 are galaxies. The remaining 2356 sources are listed in a separate table with identifications. Redshift data are also given for 212 IRAS galaxies which are not part of the complete sample, but were measured in conjunction with this project. The complete data are available in a machine-readable form through the National Space Science Data Center C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. SUNY STONY BROOK,ASTRON PROGRAM,STONY BROOK,NY 11794. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. RP STRAUSS, MA (reprint author), INST ADV STUDY,SCH NAT SCI,PRINCETON,NJ 08540, USA. NR 65 TC 306 Z9 307 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD NOV PY 1992 VL 83 IS 1 BP 29 EP 63 DI 10.1086/191730 PG 35 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JU071 UT WOS:A1992JU07100002 ER PT J AU WAGNER, RH AF WAGNER, RH TI BEHAVIORAL AND BREEDING-HABITAT RELATED ASPECTS OF SPERM COMPETITION IN RAZORBILLS SO BEHAVIOUR LA English DT Article ID EXTRA-PAIR COPULATIONS; GUILLEMOTS URIA-AALGE; ALCA-TORDA; FICEDULA-HYPOLEUCA; NORTHERN FULMAR; FEMALE; FERTILIZATIONS; HYPOTHESIS; CUCKOLDRY; STORAGE AB I observed razorbill copulation behaviour to examine the ability of males to assure their paternity in the presence of sperm competition. While males in colonial species are generally unable to guard their mates throughout the female's fertile period, male razorbills suffered a special problem in that females actively sought extra-pair copulations (EPCs) and did so in two separate locations, the colony and ledges outside the colony called ''mating arenas''. Most within-pair and extra-pair copulations were performed in the mating arenas (74% and 82%, respectively). Individuals were consistent in their attendance in one of the two arenas, depending upon the accessibility of the breeding site from the arena, and the attendance of other individuals from the same sub-colony. Individuals were also consistent in their occupation of specific sites within the arenas, and usually attended these sites between years. Attendance in the relatively small arenas brought individuals from the sparser colony into much closer proximity than when they attended their nesting sites. The higher density in the arenas was associated with females receiving EPC attempts three times more frequently upon arrival in the arenas than in the colony. Females resisted most EPC attempts, but a high proportion (50%) of females accepted at least one EPC prior to egg-laving. Mating arena attendance by males was aimed at obtaining EPCs when their mates were absent, and at attempting to assure their paternity when their mates were present. Paternity assurance was accomplished by a) inhibiting their mates from accepting EPCs, b), depriving other males access to the female, and c) copulating with the female frequently. Males did not guard their mates effectively in that they were absent from the mating arenas during a large proportion (34%) of their mates' arrivals. The principal male strategy for gaining paternity assurance was apparently to attempt frequent copulations with their mates. Males achieved cloacal contact (and presumably insemination) with their mates approximately 80 times during the 30 days preceding the laving of the single egg, and the number of days males attended the arenas was positively correlated with the number of copulations they performed with their mates. Despite half of females accepting EPCs, EPCs accounted for only 2.4% of inseminations as a result of frequent within-pair copulations. RP WAGNER, RH (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008, USA. NR 55 TC 10 Z9 10 U1 1 U2 4 PU E J BRILL PI LEIDEN PA PO BOX 9000, 2300 PA LEIDEN, NETHERLANDS SN 0005-7959 J9 BEHAVIOUR JI Behaviour PD NOV PY 1992 VL 123 BP 1 EP 26 DI 10.1163/156853992X00084 PN 1-2 PG 26 WC Behavioral Sciences; Zoology SC Behavioral Sciences; Zoology GA KX789 UT WOS:A1992KX78900001 ER PT J AU RUIZMIRANDA, CR AF RUIZMIRANDA, CR TI THE USE OF PELAGE PIGMENTATION IN THE RECOGNITION OF MOTHERS BY DOMESTIC GOAT KIDS (CAPRA-HIRCUS) SO BEHAVIOUR LA English DT Article ID MATERNAL RECOGNITION; SOCIAL AGGREGATIONS; NEWBORN LAMBS; MERINO SHEEP; CATTLE; EWES; DISCRIMINATION; ABILITY; SENSES AB Although it is known that the young play an active role in the formation of mother-young attachment in ruminants, there is scant knowledge of how neonates identify their mothers. This research investigated the use of visual cues, particularly pelage pigmentation, in maternal recognition by domestic goat kids. Observations on the use of auditory cues were carried out secondarily. The findings of this study were: (1) The analysis of error patterns revealed that goat kids performed phenotype matching on the basis of pelage pigmentation when seeking their mothers in two- and six-choice tests, at a distance of 10 m. Presenting the kids with a choice between two females of the same colour resulted in more vacillation, and fewer kids were able to go to their mother directly than when the adults were of different colours. The phenomenon was not evident when the kids were 3 days old. Because it occurred at all other ages, regardless of whether the mother was absent, covered, or fully visible, colour-matching seems to be an important aspect of maternal recognition. (2) Visual cues were important for recognition, as evidenced by the performance of kids when maternal cues were limited (i.e. the mother was covered). (3) The efficiency measures did not correlate strongly with maternal vocalizations when visual cues from the mother were not completely present or when pelage pigmentation was not a good cue for discrimination. On the contrary, kids unexpectedly vocalized more in the conditions in which they could discriminate on the basis of visual cues, that is, when the mother was bare rather than covered, and when she was paired with a doe of a different colour category rather than one of the same colour category. (4) Five-day-old domestic goat kids recognized their mothers efficiently, even within a group, and at a distance of at least 10 m. Most 3-day-kids were not able to find their mothers efficiently in the six-choice test. Errors were made at all ages. The observed performance is consistent with the abilities required of kids under natural conditions. C1 SMITHSONIAN INST,NAT ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. UNIV CALIF DAVIS,GRAD GRP ANIM BEHAV,DAVIS,CA 95616. RI Ruiz-Miranda, Carlos/H-7308-2015 OI Ruiz-Miranda, Carlos/0000-0001-7360-0304 NR 48 TC 4 Z9 5 U1 0 U2 1 PU E J BRILL PI LEIDEN PA PO BOX 9000, 2300 PA LEIDEN, NETHERLANDS SN 0005-7959 J9 BEHAVIOUR JI Behaviour PD NOV PY 1992 VL 123 BP 121 EP 143 DI 10.1163/156853992X00156 PN 1-2 PG 23 WC Behavioral Sciences; Zoology SC Behavioral Sciences; Zoology GA KX789 UT WOS:A1992KX78900008 ER PT J AU BYERS, AP BARONE, MA DONOGHUE, AM WILDT, DE AF BYERS, AP BARONE, MA DONOGHUE, AM WILDT, DE TI MATURE DOMESTIC CAT OOCYTE DOES NOT EXPRESS A CORTICAL GRANULE-FREE DOMAIN SO BIOLOGY OF REPRODUCTION LA English DT Article ID MOUSE EGGS; MEIOTIC MATURATION; ZONA-PELLUCIDA; FOLLICULAR OOCYTES; PERIODIC INCREASE; HAMSTER EGGS; FREE CALCIUM; FERTILIZATION; INVITRO; ACTIVATION AB A premature release of cortical granules (CG), found in the cortex of unfertilized oocytes, and the resulting formation of a CG-free domain (CGFD) over the metaphase II spindle are associated with nuclear maturation in the hamster and mouse. The objectives of our study were to characterize and compare the distribution of CG in immature, in vitro-matured, and in vivo-matured domestic cat oocytes while determining if a CGFD is formed that may be useful as a marker for stage and normalcy of oocyte maturation. Immature, intrafollicular oocytes were collected from ovaries obtained from local veterinary clinics, and a portion of these oocytes were matured in vitro. In vivo-matured, metaphase II oocytes were flushed from the oviducts of gonadotropin-treated, ovariohysterectomized cats. CG were visualized by Lens culinaris agglutinin-biotin/Texas red-strepavidin fluorescence, routine transmission electron microscopy, and Lens culinaris agglutinin-biotin/gold-labeled strepavidin transmission electron microscopy. No CGFD was detected in any domestic cat oocyte. Immature, in vitro-matured, and in vivo-matured oocytes had similar, uniform distributions of CG throughout the entire cortical region as measured by fluorescence microscopy. In vivo-matured oocytes were further examined by transmission electron microscopy, which confirmed the lack of a CGFD. All oocytes contained CG having a mean diameter of 0.28 +/- 0.03 mum/granule and a mean density of 51.5 +/- 13.0 CG/100 mum of plasma membrane. These results 1) demonstrate a uniformity in CG characteristics and distribution in domestic cat oocytes at various developmental stages, and 2) indicate that premature CG release does not occur and therefore, that localized cortical granule exocytosis cannot be used as a marker for oocyte maturation in this species. C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. NR 34 TC 17 Z9 19 U1 2 U2 4 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PD NOV PY 1992 VL 47 IS 5 BP 709 EP 715 DI 10.1095/biolreprod47.5.709 PG 7 WC Reproductive Biology SC Reproductive Biology GA JU827 UT WOS:A1992JU82700004 PM 1477197 ER PT J AU THOMAS, JD BARNARD, JL AF THOMAS, JD BARNARD, JL TI PODOCERUS-KLEIDUS, NEW SPECIES FROM THE FLORIDA KEYS (CRUSTACEA, AMPHIPODA, DULICHIIDAE) SO BULLETIN OF MARINE SCIENCE LA English DT Article AB Podocerus kleidus, a new species from high-current channels in the Florida Keys, is described, The species is very close to P. fulanus from marine channels in California but differs in the strongly cleft coxa 1. RP THOMAS, JD (reprint author), SMITHSONIAN INST,DEPT INVERTEBRATE ZOOL,WASHINGTON,DC 20560, USA. NR 3 TC 7 Z9 8 U1 0 U2 0 PU ROSENSTIEL SCH MAR ATMOS SCI PI MIAMI PA 4600 RICKENBACKER CAUSEWAY, MIAMI, FL 33149 SN 0007-4977 J9 B MAR SCI JI Bull. Mar. Sci. PD NOV PY 1992 VL 51 IS 3 BP 309 EP 314 PG 6 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA KQ758 UT WOS:A1992KQ75800004 ER PT J AU HUGHES, DJ JACKSON, JBC AF HUGHES, DJ JACKSON, JBC TI DISTRIBUTION AND ABUNDANCE OF CHEILOSTOME BRYOZOANS ON THE CARIBBEAN REEFS OF CENTRAL PANAMA SO BULLETIN OF MARINE SCIENCE LA English DT Article ID ENCRUSTING ORGANISMS; BUGULA-NERITINA; COMMUNITIES; ECOLOGY; GROWTH; INVERTEBRATES; ENVIRONMENTS; DISPERSAL; BERMUDA; FORM AB Cheilostome distribution and abundance were surveyed on eight reefs along the Caribbean coast of Panama to determine the extent of local variation in community structure. Communities were sampled from two depths, from several different substrata, and from two reef types defined by degree of exposure to terrigenous influence. Communities differed widely in total cheilostome cover, species richness, and species abundance pattern, but none of these measures were consistently related to reef type, depth or substratum. In all samples, a small number of the species present contributed disproportionately to the spatial cover or population of colonies. Multivariate analyses based on species cover or colony abundance distinguished between communities with a high level of accuracy, but with no consistent grouping by depth or reef type. Among the main space-occupying cheilostome species, local abundance patterns reflecting differences in reef type were rare, but several species showed clear depth-related trends in abundance. Cheilostomes dominating similar reef habitats in Jamaica and Venezuela are often identical or congeneric with those common in Panama, but some widespread species show inconsistencies in habitat preference. Results from Caribbean reefs suggest a general correlation between cheilostome life history and ecological success on different substrata. We suggest that geographic differences in the relative abundance of reef species probably do not result from a high sensitivity to local conditions, but are more likely to have a stochastic and historical basis. C1 SMITHSONIAN TROP RES INST, BALBOA, PANAMA. RP HUGHES, DJ (reprint author), DUNSTAFFNAGE MARINE RES LAB, POB 3, OBAN PA34 4AD, ARGYLL, SCOTLAND. NR 50 TC 16 Z9 17 U1 0 U2 0 PU ROSENSTIEL SCH MAR ATMOS SCI PI MIAMI PA 4600 RICKENBACKER CAUSEWAY, MIAMI, FL 33149 USA SN 0007-4977 J9 B MAR SCI JI Bull. Mar. Sci. PD NOV PY 1992 VL 51 IS 3 BP 443 EP 465 PG 23 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA KQ758 UT WOS:A1992KQ75800013 ER PT J AU MARTIN, AP HUMPHREYS, R PALUMBI, SR AF MARTIN, AP HUMPHREYS, R PALUMBI, SR TI POPULATION GENETIC-STRUCTURE OF THE ARMORHEAD, PSEUDOPENTACEROS-WHEELERI, IN THE NORTH PACIFIC-OCEAN - APPLICATION OF THE POLYMERASE CHAIN-REACTION TO FISHERIES PROBLEMS SO CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES LA English DT Article ID MITOCHONDRIAL-DNA; PENTACEROTIDAE; EVOLUTION; SEQUENCES; FLOW AB Armorhead (Pseudopentaceros wheeleri) occur in the subarctic, epipelagic habitats of the northern Pacific Ocean and are known to reproduce on seamounts in the central Pacific. Over the last few decades, overexploitation of seamount populations led to dramatic declines in abundances of reproductive populations. We undertook a study of the population genetics of armorhead to test whether distinct stocks exist in association with specific seamounts. We used the polymerase chain reaction (PCR) and a combination of DNA sequencing and restriction fragment length polymorphism (RFLP) analysis to analyze mtDNA variants for individuals collected from three localities: two seamounts and from the open ocean. We discovered that mtDNA haplotypes are not partitioned geographically, refuting the hypothesis that different seamounts harbor genetically distinct populations. Furthermore, genetic similarity of seamount and open-ocean fish supports the hypothesis that armorhead migrate between the central and northern Pacific Ocean for reproduction and feeding, respectively. C1 UNIV HAWAII,KEWALO MARINE LAB,HONOLULU,HI 96822. SMITHSONIAN TROP RES INST,NAOS MARINE LAB,MIAMI,FL 34002. NATL MARINE FISHERIES SERV,SW FISHERIES CTR,HONOLULU LAB,HONOLULU,HI 96822. RP MARTIN, AP (reprint author), UNIV HAWAII,DEPT ZOOL,HONOLULU,HI 96822, USA. NR 21 TC 42 Z9 45 U1 2 U2 6 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0706-652X J9 CAN J FISH AQUAT SCI JI Can. J. Fish. Aquat. Sci. PD NOV PY 1992 VL 49 IS 11 BP 2386 EP 2391 PG 6 WC Fisheries; Marine & Freshwater Biology SC Fisheries; Marine & Freshwater Biology GA KF388 UT WOS:A1992KF38800021 ER PT J AU UBELAKER, DH AF UBELAKER, DH TI FACIAL RECONSTRUCTION - RESPONSE SO JOURNAL OF FORENSIC SCIENCES LA English DT Letter RP UBELAKER, DH (reprint author), SMITHSONIAN INST,DEPT ANTHROPOL,NMNH 350,WASHINGTON,DC 20560, USA. NR 1 TC 2 Z9 2 U1 0 U2 0 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD NOV PY 1992 VL 37 IS 6 BP 1442 EP 1444 PG 3 WC Medicine, Legal SC Legal Medicine GA KD642 UT WOS:A1992KD64200005 ER PT J AU BARNUM, SA MANVILLE, CJ TESTER, JR CARMEN, WJ AF BARNUM, SA MANVILLE, CJ TESTER, JR CARMEN, WJ TI PATH SELECTION BY PEROMYSCUS-LEUCOPUS IN THE PRESENCE AND ABSENCE OF VEGETATIVE COVER SO JOURNAL OF MAMMALOGY LA English DT Article DE PEROMYSCUS-LEUCOPUS; FLUORESCENT POWDER; VEGETATIVE COVER; BEHAVIOR ID HABITAT; TRACKING AB We examined path selection and avoidance by tracking Peromyscus leucopus marked with fluorescent powder in Minnesota and Maryland. Mice at both sites selected logs >5 cm in diameter and avoided logs <5 cm in diameter. In Minnesota, two types of soft log, smooth and mossy, were strongly selected, and hard, smooth logs were avoided. Mice selected forb cover and avoided grass cover in Minnesota and selected bare ground and avoided leaf cover in Maryland. The same pathways were used repeatedly in Maryland, but not in Minnesota. Individual P. leucopus appear to restrict their movements to paths that offer protection from predators searching by sight or sound. C1 UNIV MINNESOTA,DEPT ECOL EVOLUT & BEHAV,MINNEAPOLIS,MN 55455. SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037. RP BARNUM, SA (reprint author), UTAH STATE UNIV,DEPT FISHERIES & WILDLIFE,LOGAN,UT 84322, USA. NR 9 TC 60 Z9 64 U1 1 U2 11 PU AMER SOC MAMMALOGISTS PI PROVO PA BRIGHAM YOUNG UNIV, DEPT OF ZOOLOGY, PROVO, UT 84602 SN 0022-2372 J9 J MAMMAL JI J. Mammal. PD NOV PY 1992 VL 73 IS 4 BP 797 EP 801 DI 10.2307/1382198 PG 5 WC Zoology SC Zoology GA JZ555 UT WOS:A1992JZ55500008 ER PT J AU DONOGHUE, AM JOHNSTON, LA SEAL, US ARMSTRONG, DL SIMMONS, LG GROSS, T TILSON, RL WILDT, DE AF DONOGHUE, AM JOHNSTON, LA SEAL, US ARMSTRONG, DL SIMMONS, LG GROSS, T TILSON, RL WILDT, DE TI ABILITY OF THAWED TIGER (PANTHERA-TIGRIS) SPERMATOZOA TO FERTILIZE CONSPECIFIC EGGS AND BIND AND PENETRATE DOMESTIC CAT EGGS INVITRO SO JOURNAL OF REPRODUCTION AND FERTILITY LA English DT Article DE TIGER; SPERMATOZOA; CRYOPRESERVATION; INVITRO FERTILIZATION; EMBRYO ID FOLLICULAR OOCYTES; EMBRYO DEVELOPMENT; ACROSOMAL INTEGRITY; FROZEN SPERMATOZOA; FELIS-BENGALENSIS; EJACULATE; LEOPARD; SPERM; SEMEN; CAPACITATION AB Electroejaculates from tigers were collected and half was used fresh to inseminate tiger eggs in vitro and domestic cat eggs stored in a hypertonic salt solution. The remainder was pelleted, frozen in a solution of 20% egg yolk, 11% lactose and 4% glycerol, thawed and cultured with tiger and domestic cat eggs. The motility index ((sperm % motility) + (status rating x 20))/2 for thawed spermatozoa was about 86% of that in fresh aliquots. Of the 49 tiger oocytes inseminated in vitro with fresh spermatozoa, 34 (69.4%) cleaved, compared with 33 of 47 oocytes (70.2%) cultured with thawed spermatozoa (P > 0-05). Embryos generated by either sperm treatment could develop in vitro to the 16-cell or morula stage. Fresh and thawed tiger spermatozoa were equally capable (P > 0.05) of binding and penetrating the outer and inner zona pellucida of domestic cat eggs. These results demonstrate the ability of frozen-thawed tiger spermatozoa to (i) penetrate homologous and heterologous eggs and (ii) result in conspecific, advanced development of preimplantation embryos in vitro. C1 HENRY DOORLY ZOO,OMAHA,NE 68107. CAPT BREEDING SPECIALIST GRP,MINNEAPOLIS,MN 55417. MINNESOTA ZOOL GARDENS,APPLE VALLEY,MN 55417. RP DONOGHUE, AM (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. FU NICHD NIH HHS [HD 23853] NR 37 TC 38 Z9 38 U1 0 U2 4 PU J REPROD FERTIL INC PI CAMBRIDGE PA 22 NEWMARKET RD, CAMBRIDGE, ENGLAND CB5 8DT SN 0022-4251 J9 J REPROD FERTIL JI J. Reprod. Fertil. PD NOV PY 1992 VL 96 IS 2 BP 555 EP 564 PG 10 WC Reproductive Biology SC Reproductive Biology GA KG137 UT WOS:A1992KG13700015 PM 1339836 ER PT J AU IVERSON, SJ SAMPUGNA, J OFTEDAL, OT AF IVERSON, SJ SAMPUGNA, J OFTEDAL, OT TI POSITIONAL SPECIFICITY OF GASTRIC HYDROLYSIS OF LONG-CHAIN N-3 POLYUNSATURATED FATTY-ACIDS OF SEAL MILK TRIGLYCERIDES SO LIPIDS LA English DT Article; Proceedings Paper CT SYMP ON MILK LIPIDS, AT THE 1990 ANNUAL MEETING OF THE AMERICAN OIL CHEMISTS SOC CY APR, 1990 CL BALTIMORE, MD SP AMER OIL CHEM SOC ID LINGUAL LIPASE; CYSTOPHORA-CRISTATA; HOODED SEAL; STEREOSPECIFIC ANALYSIS; MOLECULAR-CLONING; SUCKLING RAT; FISH OILS; DIGESTION; DOG; ABSORPTION AB Long-chain n-3 polyunsaturated fatty acids (n-3 PUFA) of marine oils are important dietary components for both infants and adults, and are incorporated into milks following maternal dietary intake. However, little is known about the hydrolysis of these PUFA from milk triglycerides (TG) by lipases in suckling young. Seals, like humans, possess gastric lipase; however, the milk lipids of seals and rea lions are almost devoid of the readily hydrolyzable medium-chain fatty acids, and are characterized by a large percentage (10-30%) of n-3 PUFA. Gastric hydrolysis of milk lipids was studied in vivo in suckling pups of three species (the California sea lion, the harp seal and the hooded seal) in order to elucidate the actions and specificity of gastric lipases on milk TG in relation to fatty acid composition and TG structure. Regardless of milk fat content (31-61% fat) or extent of gastric hydrolysis (10-56%), the same fatty acids were preferentially released in all three species, as determined by their relative enrichment in the free fatty acid (FFA) fraction. In addition to 16:1 and 18:0, these were the PUFA of 18 carbons and longer, except for 22:6n-3. Levels of 20:5n-3 were most notably enriched in FFA, at up to five times that found in the TG. Although 22:6n-3 was apparently also released from the TG (reduced in the diglyceride), it was also notably reduced in FFA. Positional analysis of milk TG based on the products of Grignard hydrolysis revealed that these PUFA, including 22:6n-3, were preferentially esterified at the alpha-position of the TG, and that the fatty acids not released during gastric hydrolysis were located at the sn-2 position. The extreme reduction of 22:6n-3 and enrichment of 20:5n-3 in FFA is discussed. Results from this study are consistent with reports that gastric lipase acts stereo-specifically to release fatty acids at the alpha-positions (sn-3, sn-1). We conclude that the n-3 PUFA in milk are efficiently hydrolyzed by gastric lipase and that this has important implications for digestion of milks enriched in PUFA by neonates in general. C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLL PK,MD 20742. NR 74 TC 42 Z9 42 U1 1 U2 8 PU AMER OIL CHEMISTS SOC PI CHAMPAIGN PA 1608 BROADMOOR DRIVE, CHAMPAIGN, IL 61821-0489 SN 0024-4201 J9 LIPIDS JI Lipids PD NOV PY 1992 VL 27 IS 11 BP 870 EP 878 DI 10.1007/BF02535866 PG 9 WC Biochemistry & Molecular Biology; Nutrition & Dietetics SC Biochemistry & Molecular Biology; Nutrition & Dietetics GA JZ528 UT WOS:A1992JZ52800009 PM 1491605 ER PT J AU IVERSON, SJ OFTEDAL, OT AF IVERSON, SJ OFTEDAL, OT TI FATTY-ACID COMPOSITION OF BLACK BEAR (URSUS-AMERICANUS) MILK DURING AND AFTER THE PERIOD OF WINTER DORMANCY SO LIPIDS LA English DT Note ID RATS AB Black bears give birth and lactate during the 2-3-mon fast of winter dormancy. Thereafter the female emerges from the den with her cubs and begins to feed. We investigated fatty acid patterns of milk from native Pennsylvania black bears during the period of winter dormancy, as well as after den emergence. Throughout winter dormancy, milk fatty acid composition remained relatively constant. The principal fatty acids at all times were 14:0, 16:0, 16:1, 18:0, 18:1, 18:2n-6, 18:3n-3 and 20:4n-6. After den emergence, large changes occurred in almost all the fatty acids, particularly in 18:2n-6 and 18:3n-3. Large variability among the active free-ranging animals likely reflected differences in diet. In a carnivore, with apparently limited de novo synthesis of fatty acids, milk fatty acid composition may be affected by factors such as transition from reliance on stored lipids to feeding, and by temporal changes in dietary intake. C1 SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. RP IVERSON, SJ (reprint author), TECH UNIV NOVA SCOTIA,CANADIAN INST FISHERIES TECHNOL,1360 BARRINGTON ST,POB 1000,HALIFAX B3J 2X4,NS,CANADA. NR 34 TC 19 Z9 19 U1 0 U2 6 PU AMER OIL CHEMISTS SOC PI CHAMPAIGN PA 1608 BROADMOOR DRIVE, CHAMPAIGN, IL 61821-0489 SN 0024-4201 J9 LIPIDS JI Lipids PD NOV PY 1992 VL 27 IS 11 BP 940 EP 943 DI 10.1007/BF02535877 PG 4 WC Biochemistry & Molecular Biology; Nutrition & Dietetics SC Biochemistry & Molecular Biology; Nutrition & Dietetics GA JZ528 UT WOS:A1992JZ52800020 PM 1491615 ER PT J AU GUZMAN, HM JIMENEZ, CE AF GUZMAN, HM JIMENEZ, CE TI CONTAMINATION OF CORAL REEFS BY HEAVY-METALS ALONG THE CARIBBEAN COAST OF CENTRAL-AMERICA - (COSTA-RICA AND PANAMA) SO MARINE POLLUTION BULLETIN LA English DT Article ID MAJOR OIL-SPILL; POLLUTION; LEAD; SKELETONS; SEDIMENTS; CADMIUM; ISLANDS; FLUXES AB A survey of 12 heavy metals in the skeleton of the coral Siderastrea siderea and reef sediments in 23 reefs along the Caribbean coast of Costa Rica and Panama (1497 km) indicates high levels of pollution in the region. The entire coast is influenced by hundreds of rivers increasingly loaded with suspended sediments (associated with deforestation) which carry most of the metals several kilometres from the sources to the sea, where they are probably transported and distributed by currents through the entire region, even to pristine offshore reefs. Central America coastal areas are currently exposed to a larger range of metal pollution (natural and anthropogenic) than ever before, as a result of the increasing environmental contamination from sewage discharges, oil spills (from refineries and tankers), the misuse of agricultural chemicals and fertilizers, and topsoil erosion. C1 UNIV COSTA RICA, ESCUELA BIOL, SAN JOSE, COSTA RICA. RP SMITHSONIAN TROP RES INST, APARTADO 2072, BALBOA, PANAMA. NR 36 TC 93 Z9 98 U1 3 U2 70 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0025-326X EI 1879-3363 J9 MAR POLLUT BULL JI Mar. Pollut. Bull. PD NOV PY 1992 VL 24 IS 11 BP 554 EP 561 DI 10.1016/0025-326X(92)90708-E PG 8 WC Environmental Sciences; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA KA984 UT WOS:A1992KA98400008 ER PT J AU GREENBERG, R AF GREENBERG, R TI RESPONSES TO A SIMPLE HABITAT CUE IN NAIVE SWAMP AND SONG SPARROWS SO OECOLOGIA LA English DT Note ID SELECTION; WARBLER RP GREENBERG, R (reprint author), SMITHSONIAN INST,NATL ZOOL PK,SMITHSONIAN MIGRATORY BIRD CTR,WASHINGTON,DC 20008, USA. NR 13 TC 4 Z9 4 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD NOV PY 1992 VL 92 IS 2 BP 299 EP 300 DI 10.1007/BF00317379 PG 2 WC Ecology SC Environmental Sciences & Ecology GA JY895 UT WOS:A1992JY89500023 PM 28313066 ER PT J AU BABB, JF DALGARNO, A AF BABB, JF DALGARNO, A TI SPIN COUPLING-CONSTANTS AND HYPERFINE TRANSITION FREQUENCIES FOR THE HYDROGEN MOLECULAR ION SO PHYSICAL REVIEW A LA English DT Note ID N2+ AB We have calculated for the ten lowest vibrational levels of H-2+ the first-order hyperfine and spin-rotation constants with the inclusion in perturbation theory of the first-order coupling of the electron and nuclear motion and have determined the hyperfine transition frequencies. The calculated frequencies agree to better than 175 kHz with all the experimentally determined hyperfine frequencies for the N = 1 rotational level and to better than 3 kHz for the N = 2 rotational level. Relativistic and radiative effects may account for the remaining discrepancy. RP BABB, JF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Babb, James/0000-0002-3883-9501 NR 21 TC 20 Z9 20 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV 1 PY 1992 VL 46 IS 9 BP R5317 EP R5319 PG 3 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JX834 UT WOS:A1992JX83400003 ER PT J AU KHURANA, JP CLELAND, CF AF KHURANA, JP CLELAND, CF TI ROLE OF SALICYLIC-ACID AND BENZOIC-ACID IN FLOWERING OF A PHOTOPERIOD-INSENSITIVE STRAIN, LEMNA-PAUCICOSTATA LP6 SO PLANT PHYSIOLOGY LA English DT Article ID FLORAL INDUCTION; NEUTRAL DUCKWEED; PLANT HORMONES; IRON AB Lemna paucicostata LP6 does not normally flower when grown on basal Bonner-Devirian medium, but substantial flowering is obtained when 10 muM salicylic acid (SA) or benzoic acid is added to the medium. Benzoic acid is somewhat more effective than SA, and the threshold level of both SA and benzoic acid required for flower initiation is reduced as the pH of the medium is lowered to 4.0. SA- or benzoic acid-induced flowering is enhanced in the simultaneous presence of 6-benzylaminopurine (BAP), although BAP per se does not influence flowering in strain LP6. Continuous presence of SA or benzoic acid in the culture medium is essential to obtain maximal flowering. A short-term treatment of the plants (for first 24 h) with 10 muM SA or benzoic acid, followed by culture in the basal medium containing 1 muM BAP can, however, stimulate profuse flowering. Benzoic acid is more effective than SA, and the effect is more pronounced at pH 4 than at 5.5. Thus, under these conditions, flowering is of an inductive nature. Experiments with [C-14]SA and [C-14]benzoic acid have provided evidence that at pH 4 there is relatively more uptake of benzoic acid than SA, thus leading to an increased flowering response. The data obtained from the experiments designed to study the mobility of [C-14]SA and [C-14]benzoic acid from mother to daughter fronds indicate that there is virtually no mobility of SA or benzoic acid between fronds. C1 SMITHSONIAN ENVIRONM RES CTR,ROCKVILLE,MD 20852. NR 19 TC 11 Z9 12 U1 0 U2 3 PU AMER SOC PLANT PHYSIOLOGISTS PI ROCKVILLE PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 SN 0032-0889 J9 PLANT PHYSIOL JI Plant Physiol. PD NOV PY 1992 VL 100 IS 3 BP 1541 EP 1546 DI 10.1104/pp.100.3.1541 PG 6 WC Plant Sciences SC Plant Sciences GA JX827 UT WOS:A1992JX82700069 PM 16653155 ER PT J AU BLUNDELL, R TONG, CYE AF BLUNDELL, R TONG, CYE TI SUBMILLIMETER RECEIVERS FOR RADIO ASTRONOMY SO PROCEEDINGS OF THE IEEE LA English DT Review ID GHZ SIS-RECEIVER; TUNNEL JUNCTION RECEIVER; FAR-INFRARED WAVELENGTHS; BOW-TIE ANTENNAS; QUASIPARTICLE MIXERS; FREQUENCY-RANGE; MILLIMETER; GAIN; ARRAYS; MODEL AB The state of development of receivers for submillimeter-wave radio astronomy is reviewed. Bolometers for continuum observation, hot-electron mixer receivers for narrow-band spectral line observation, and heterodyne receivers, both Schottky diode and superconducting tunnel junction, are presented. At the lower frequency end of the submillimeter band, standard waveguide techniques, scaled from millimeter wavelengths, prevail. At wavelengths shorter than about 0.5 mm quasioptical designs are preferred. in the case of Schottky diode receivers, corner cube designs are used almost exclusively, whereas integrated mixer designs are the focal point of research for SIS receivers at these wavelengths. Although such designs are extensively reviewed, it is nevertheless the Schottky diode mixer remains the element of choice at the shortest submillimeter wavelengths. C1 HARVARD UNIV,DEPT ASTRON,CAMBRIDGE,MA 02138. RP BLUNDELL, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,SUBMILLIMETER RECEIVER LAB,CAMBRIDGE,MA 02138, USA. OI Tong, Edward/0000-0002-7736-4203 NR 106 TC 97 Z9 98 U1 0 U2 10 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9219 J9 P IEEE JI Proc. IEEE PD NOV PY 1992 VL 80 IS 11 BP 1702 EP 1720 DI 10.1109/5.175250 PG 19 WC Engineering, Electrical & Electronic SC Engineering GA KC434 UT WOS:A1992KC43400004 ER PT J AU TORRES, G AF TORRES, G TI CHARACTERISTICS OF THE SPECTROSCOPIC BINARIES IN THE HALO OF THE GALAXY SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Note RP TORRES, G (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,DIV OPT & INFRARED ASTRON,60 GARDEN ST,MAIL STOP 20,CAMBRIDGE,MA 02138, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD NOV PY 1992 VL 104 IS 681 BP 1108 EP 1108 DI 10.1086/133098 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JY713 UT WOS:A1992JY71300014 ER PT J AU GINGERICH, O AF GINGERICH, O TI ASTRONOMY IN THE AGE OF COLUMBUS SO SCIENTIFIC AMERICAN LA English DT Article C1 HARVARD UNIV,DEPT HIST SCI,CAMBRIDGE,MA 02138. RP GINGERICH, O (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU SCI AMERICAN INC PI NEW YORK PA 415 MADISON AVE, NEW YORK, NY 10017 SN 0036-8733 J9 SCI AM JI Sci.Am. PD NOV PY 1992 VL 267 IS 5 BP 100 EP 105 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KW081 UT WOS:A1992KW08100015 ER PT J AU ISOVIITA, P AF ISOVIITA, P TI REPORT OF THE SPECIAL COMMITTEE-3 ON LECTOTYPIFICATION SO TAXON LA English DT Article AB A general discussion is given of the background and work of the three Subcommittees comprising this Committee: 3A Lectotypification, 3B Retroactivity of Lectotypification and Illegitimacy, and 3C Lectotypification of Linnaean Generic Names. C1 UNIV HELSINKI,BOT MUSEUM,SF-00170 HELSINKI 17,FINLAND. RP ISOVIITA, P (reprint author), SMITHSONIAN INST,DEPT BOT,NHB-166,WASHINGTON,DC 20560, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU INT ASSN PLANT TAXONOMY PI BERLIN PA BOTANISCHER GARTEN & MUSEUM KONIGIN-LUISSE-STRASSE 6-8, W-1000 BERLIN, GERMANY SN 0040-0262 J9 TAXON JI Taxon PD NOV PY 1992 VL 41 IS 4 BP 725 EP 727 DI 10.2307/1222398 PG 3 WC Plant Sciences; Evolutionary Biology SC Plant Sciences; Evolutionary Biology GA KA169 UT WOS:A1992KA16900008 ER PT J AU DUMBACHER, JP BEEHLER, BM SPANDE, TF GARRAFFO, HM AF DUMBACHER, JP BEEHLER, BM SPANDE, TF GARRAFFO, HM TI HOMOBATRACHOTOXIN IN THE GENUS PITOHUI - CHEMICAL DEFENSE IN BIRDS SO SCIENCE LA English DT Article ID COLORATION AB Three passerine species in the genus Pitohui, endemic to the New Guinea subregion, contain the steroidal alkaloid homobatrachotoxin, apparently as a chemical defense. Toxin concentrations varied among species but were always highest in the skin and feathers. Homobatrachotoxin is a member of a class of compounds collectively called batrachotoxins that were previously considered to be restricted to neotropical poison-dart frogs of the genus Phyllobates. The occurrence of homobatrachotoxin in pitohuis suggests that birds and frogs independently evolved this class of alkaloids. C1 SMITHSONIAN INST,WILDLIFE CONSERVAT INT CONSERVAT INT,DIV BIRDS,WASHINGTON,DC 20560. NIH,BIOORGAN CHEM LAB,BETHESDA,MD 20892. RP DUMBACHER, JP (reprint author), UNIV CHICAGO,DEPT ECOL & EVOLUT,CHICAGO,IL 60637, USA. NR 10 TC 133 Z9 140 U1 3 U2 33 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD OCT 30 PY 1992 VL 258 IS 5083 BP 799 EP 801 DI 10.1126/science.1439786 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JV692 UT WOS:A1992JV69200037 PM 1439786 ER PT J AU KLOSE, KB WOOD, JA HASHIMOTO, A AF KLOSE, KB WOOD, JA HASHIMOTO, A TI MINERAL EQUILIBRIA AND THE HIGH RADAR REFLECTIVITY OF VENUS MOUNTAINTOPS SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID INITIAL ANALYSIS; SURFACE; MAGELLAN; ATMOSPHERE AB We studied the relationship between altitude and microwave emissivity (the complement of power reflectivity) in 10 highland regions of Venus, using the Magellan data set. Above a critical altitude that ranges from 4.75 km on Maxwell Montes to 2.49 km on Sapas Mons, emissivity undergoes an abrupt decrease to values so low (<0.6) that the surface mineralogy on these mountaintops must differ from that at lower altitudes in such a way as to enhance the bulk dielectric constant of the highland surface material. This emissivity effect probably is produced not by basalt minerals but by a secondary, weathered mineral assemblage. We developed the phase diagrams descriptive of equilibrium secondary mineral assemblages on Venus, as a function of altitude and atmospheric redox state. The mineral responsible for low emissivity on mountaintops appears to be the electrical semiconductor pyrite (FeS2). Variation from one highland area to another in the altitude at which pyrite becomes the stable Fe mineral (as opposed to magnetite at lower altitudes) may be attributable to local modulation by topography of the atmospheric thermal profile. The altitudes at which the magnetite/pyrite phase boundary is encountered vary with the redox state of the atmosphere, and observed values of this altitude can be used to estimate an oxygen fugacity at plains level of approximately 10(-21) bars. Maat Mons, a volcanic peak almost as lofty as Maxwell Montes, is the only high mountaintop oil Venus that has not weathered to a low-emissivity mineral assemblage. Presumably, this means flows at the highest altitudes are negligibly weathered and the volcano is relatively young. RP KLOSE, KB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 56 TC 51 Z9 51 U1 3 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD OCT 25 PY 1992 VL 97 IS E10 BP 16353 EP 16369 PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JV615 UT WOS:A1992JV61500020 ER PT J AU SAIZAR, P STARRFIELD, S FERLAND, GJ WAGNER, RM TRURAN, JW KENYON, SJ SPARKS, WM WILLIAMS, RE STRYKER, LL AF SAIZAR, P STARRFIELD, S FERLAND, GJ WAGNER, RM TRURAN, JW KENYON, SJ SPARKS, WM WILLIAMS, RE STRYKER, LL TI A MULTIWAVELENGTH STUDY OF NOVA-QU-VULPECULAE 1984 SO ASTROPHYSICAL JOURNAL LA English DT Article DE NOVAE; CATACLYSMIC VARIABLES; STARS, ABUNDANCES; STARS, INDIVIDUAL (QU VUL); ULTRAVIOLET, STARS ID CLASSICAL NOVAE; NEON NOVA; ABUNDANCES; LINES; AL-26; EXPLOSIONS; DISCOVERY; OUTBURSTS; NUMBER-2; EMISSION AB We have combined ground-based optical and satellite ultraviolet spectrophotometric data to study the ejected shell of Nova Vulpecula 1984 No. 2 (QU Vul). Substantial uncertainties concerning the nature of the ionizing continuum, and the role played by density inhomogeneities, now exist. Because of these uncertainties, the chemical composition is deduced from emission-line pairs chosen to minimize the effects of variations in temperature, density, and ionization. We find that the chemical composition of the ejected shell show enhancements of several elements relative to hydrogen, namely, He, N, O, Ne, Mg, Al, and Si, as is expected for an outburst occurring on an ONeMg white dwarf. An almost featureless continuous spectrum and high-ionization lines suggest that a very hot "coronal-line" region is also present, which may contribute to the ionization of the gas and dominate both the mass and the energetics of the ejecta. The total mass of the ejecta is estimated to lie in the range from 0.2 to 15 x 10(-4) M.. This high value of the ejected mass implies a low white dwarf's mass, which is not expected in ONeMg novae. The above results also show that QU Vul ejected a large amount of aluminum into the interstellar medium, and it is estimated that only a small fraction of slow novae of this type can account for the observed abundance of aluminum in the Galaxy. C1 ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287. UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545. NATL OPT ASTRON OBSERV,CERRO TOLOLO INTER AMER OBSERV,LA SERENA,CHILE. RP SAIZAR, P (reprint author), OHIO STATE UNIV,DEPT ASTRON,COLUMBUS,OH 43210, USA. OI Kenyon, Scott/0000-0003-0214-609X; Ferland, Gary/0000-0003-4503-6333 NR 49 TC 58 Z9 58 U1 0 U2 0 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 20 PY 1992 VL 398 IS 2 BP 651 EP 664 DI 10.1086/171890 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JR890 UT WOS:A1992JR89000026 ER PT J AU STRAUSS, MA HUCHRA, JP DAVIS, M YAHIL, A FISHER, KB TONRY, J AF STRAUSS, MA HUCHRA, JP DAVIS, M YAHIL, A FISHER, KB TONRY, J TI A REDSHIFT SURVEY OF IRAS GALAXIES .7. THE INFRARED AND REDSHIFT DATA FOR THE 1,936 JANSKY SAMPLE SO ASTROPHYSICAL JOURNAL LA English DT Note C1 INST ADV STUDY,INST NAT SCI,PRINCETON,NJ 08540. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. MIT,DEPT ASTRON,CAMBRIDGE,MA 02139. NR 0 TC 0 Z9 0 U1 0 U2 0 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 20 PY 1992 VL 398 IS 2 BP 709 EP 709 PN 1 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JR890 UT WOS:A1992JR89000032 ER PT J AU SMITH, HA FISCHER, J AF SMITH, HA FISCHER, J TI MULTIPLE JETS FROM THE YOUNG STAR IRAS-21334+5039 SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; INFRARED, STARS; ISM, JETS AND OUTFLOWS; STARS, IMAGING; STARS, INDIVIDUAL (IRAS-21334+5039) ID CIRCUMSTELLAR ENVELOPE; INFRARED-EMISSION; IRAS 16293-2422; SOLAR CIRCLE; L1551 IRS-5; OUTFLOW; REGIONS AB The source IRAS 21334 + 5039, a young stellar object (YSO) with broad CO outflow velocity profiles, was imaged in the 1-2 mum region with broad-band J, H, and K filters, and with a Fabry-Perot set to the molecular hydrogen upsilon = 1-0 S(1) line, the hydrogen Brgamma recombination line, and the neighboring continua. At 2 mum the source has an elongated continuum emission structure centered on the star. The structure has very blue tips, with a weak VLA 6 cm continuum source coincident with one of them. Strong molecular hydrogen emission appears as bow-shaped arcs oriented along an axis perpendicular to the continuum emission, and as a weaker structure aligned with it. Both the continuum and the molecular hydrogen emission are most likely produced by jets, possibly emanating in multiple directions from the central source at large angles to each other. While jets are a common feature of young stars, this source provides solid evidence for multiple jet structures. C1 USN,RES LAB,CTR ADV SPACE SENSING,WASHINGTON,DC 20375. RP SMITH, HA (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,MS-321,WASHINGTON,DC 20560, USA. NR 34 TC 8 Z9 8 U1 0 U2 0 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 20 PY 1992 VL 398 IS 2 BP L99 EP & DI 10.1086/186586 PN 2 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JR892 UT WOS:A1992JR89200006 ER PT J AU CHERNIN, LM BLUNDELL, R TONG, CYE MILLER, RE AF CHERNIN, LM BLUNDELL, R TONG, CYE MILLER, RE TI FUNDAMENTAL AND HARMONIC MIXING AT 500 GHZ USING A SUPERCONDUCTOR-INSULATOR-NORMAL METAL JUNCTION SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID TUNNEL JUNCTION AB We have demonstrated fundamental and harmonic mixing using a PbInAu/InOxPbOx/Ag superconductor-insulator-normal metal tunnel junction mixer designed to operate over the 450-550 GHz frequency range. Direct mixing experiments at up to 1.8 times the pp frequency of the tunnel junction have shown that the mixer works in both fundamental and second harmonic modes, with the highest conversion from the fundamental mode obtained at bias voltages near the pp voltage and the highest conversion from the harmonic mode obtained at zero bias. The measured mixer conversion curves are consistent with our five-port model simulations based on Tucker's quantum mixer theory [IEEE J. Quantum. Electron. QE-15, 1234 (1979)]. C1 AT&T BELL LABS,MURRAY HILL,NY 11536. RP CHERNIN, LM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. OI Tong, Edward/0000-0002-7736-4203 NR 10 TC 3 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD OCT 15 PY 1992 VL 72 IS 8 BP 3829 EP 3831 DI 10.1063/1.352284 PG 3 WC Physics, Applied SC Physics GA JT986 UT WOS:A1992JT98600096 ER PT J AU ORING, LW FLEISCHER, RC REED, JM MARSDEN, KE AF ORING, LW FLEISCHER, RC REED, JM MARSDEN, KE TI CUCKOLDRY THROUGH STORED SPERM IN THE SEQUENTIALLY POLYANDROUS SPOTTED SANDPIPER SO NATURE LA English DT Article ID COPULATION BEHAVIOR; MATING SUCCESS; DNA; BIRDS; COMPETITION; PATERNITY; FINGERPRINTS; STORAGE AB STUDIES of mating systems are often hindered by an inability to determine parentage unequivocally. DNA fingerprinting advanced the field by allowing determination of parentage1-3, especially when alternate mating tactics such as extra-pair fertilizations and parasitic egg-laying are used4-6. A very different, yet essentially unexplored, alternate mating tactic involves fertilization by the sperm of previous mates that is stored for long periods of time. Some birds have the potential to be fertilized by sperm stored in the oviduct for over a month7, but studies of long-term sperm storage among wild birds are limited. In the polyandrous spotted sandpiper (Actitis macularia), territorial females pair with, defend and lay clutches for several males in rapid succession. Here we report that males pairing early in the season cuckold their females' later mates by means of stored sperm. Thus, early-pairing males not only have greater confidence of paternity, but also increase their reproductive success by fertilizing a proportion of eggs laid for, and incubated by, their females' subsequent mates, in addition to those they incubate themselves. C1 SMITHSONIAN INST,NATL ZOOL PK,GENET LAB,WASHINGTON,DC 20008. RP ORING, LW (reprint author), UNIV NEVADA,ECOL EVOLUT & CONSERVAT BIOL PROGRAM,RENO,NV 89512, USA. NR 29 TC 95 Z9 95 U1 7 U2 16 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD OCT 15 PY 1992 VL 359 IS 6396 BP 631 EP 633 DI 10.1038/359631a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JT824 UT WOS:A1992JT82400055 ER PT J AU LI, YL PHILLIPS, WC STANTON, M KALATA, K AF LI, YL PHILLIPS, WC STANTON, M KALATA, K TI CHARACTERIZATION OF A SIT VIDICON X-RAY-DETECTOR FOR CRYSTALLOGRAPHY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID TELEVISION AREA DETECTOR; DIFFRACTION AB An 80 mm diameter SIT vidicon-based area detector developed for X-ray crystallographic studies of proteins and other macromolecular structures using laboratory X-ray sources is described. The DQE, linearity, dynamic range, and point response function of the detector have been measured. For a Bragg peak at maximum detector gain, the DQE is > 0.5 for counting rates from 1 to 100 X-ray photons/s/peak. At maximum gain, the response is linear over a range of 1 to 170 X-ray photons/s/Bragg peak; at 1% of maximum gain. the response is linear over a range of 10 to 10000 X-ray photons/s/Bragg peak. The dynamic range for Bragg peaks is 1600, and the FWHM of the point response function is 0.6 mm. Results of studies of ion distributions and interactions in insulin crystals which demonstrate the use of the detector are described. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP LI, YL (reprint author), BRANDEIS UNIV,ROSENSTIEL BASIC MED SCI RES CTR,WALTHAM,MA 02254, USA. NR 20 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD OCT 15 PY 1992 VL 322 IS 1 BP 116 EP 125 DI 10.1016/0168-9002(92)90365-B PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA JV512 UT WOS:A1992JV51200016 ER PT J AU NARAYAN, R AF NARAYAN, R TI THE PHYSICS OF PULSAR SCINTILLATION SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES LA English DT Article ID REFRACTIVE INTERSTELLAR SCINTILLATION; SCATTER-BROADENED IMAGE; RADIO-SOURCES; DENSITY FLUCTUATIONS; SOLAR-WIND; PROPAGATION; SPECTRUM; PLASMA; INTERFEROMETRY; ASTRONOMY AB Scintillation is a well-known phenomenon in astronomy, e.g. twinkling of stars due to scattering in the Earth's atmosphere, and variability of compact radio sources due to scattering in the ionosphere and the solar wind. These examples correspond to the so-called regime of weak scattering. Radio pulsars scintillate as a result of scattering in the ionized interstellar medium, but in contrast to the previous cases, the physical regime corresponds to strong scattering. Pulsars exhibit two distinct kinds of variability, called diffractive scintillation and refractive scintillation, on timescales of minutes and weeks respectively. The physics of the various regimes of scintillation are reviewed, and some basic theoretical results are summarized. The properties of imaging in the presence of strong scattering are also discussed. RP NARAYAN, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 58 TC 114 Z9 114 U1 0 U2 3 PU ROYAL SOC LONDON PI LONDON PA 6 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5AG SN 0962-8428 J9 PHILOS T ROY SOC A JI Philos. Trans. R. Soc. Lond. Ser. A-Math. Phys. Eng. Sci. PD OCT 15 PY 1992 VL 341 IS 1660 BP 151 EP 165 DI 10.1098/rsta.1992.0090 PG 15 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JV239 UT WOS:A1992JV23900010 ER PT J AU HUGHES, JP TANAKA, Y AF HUGHES, JP TANAKA, Y TI THE X-RAY-SPECTRUM OF ABELL-665 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; INTERGALACTIC MEDIUM; X-RAYS, GALAXIES ID COMA CLUSTER; DARK MATTER; GALAXIES; EINSTEIN; SENSITIVITY; DYNAMICS; GINGA; MASS AB The X-ray spectrum of the Abell 665 cluster of galaxies has been determined by the Ginga satellite. The spectrum can be well fitted by an isothermal model with kT = 8.26(+0.95; -0.81) keV and metal abundance 0.49 +/- 0.16. Joint analysis with lower energy spectral data from the Einstein Observatory is used to constrain the temperature distribution in the cluster. For a particular form of the polytropic temperature model we find the best fit to be the isothermal case, and we set an upper limit on the polytropic index of 1.35 (99% confidence). The virial mass of the cluster has been determined from both the X-ray data and the galaxy velocity dispersion. The mass estimates from the optical and X-ray analyses are fully consistent with each other. Abell 665 is found to be 0.82(+0.41; -0.26) times as massive as Coma if the two clusters are assumed to have the same spatial distribution of virial mass. C1 INST SPACE & ASTRONAUT SCI,SAGAMIHARA,KANAGAWA 229,JAPAN. RP HUGHES, JP (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 34 TC 23 Z9 23 U1 0 U2 0 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 10 PY 1992 VL 398 IS 1 BP 62 EP 68 DI 10.1086/171835 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ397 UT WOS:A1992JQ39700006 ER PT J AU RYBICKI, GB PRESS, WH AF RYBICKI, GB PRESS, WH TI INTERPOLATION, REALIZATION, AND RECONSTRUCTION OF NOISY, IRREGULARLY SAMPLED DATA SO ASTROPHYSICAL JOURNAL LA English DT Article DE METHODS, ANALYTICAL; METHODS, DATA ANALYSIS; METHODS, NUMERICAL ID TIME-SERIES ANALYSIS AB Various statistical procedures related to linear prediction and optimal filtering are developed for general, irregularly sampled, data sets. The data set may be a function of time, a spatial sample, or an unordered set. In the case of time series, the underlying process may be low-frequency divergent (weakly nonstationary). Explicit formulas are given for (i) maximum likelihood reconstruction (interpolation) with estimation of uncertainties, (ii) reconstruction by unbiased estimators (Gauss-Markov), (iii) unconstrained Monte Carlo realization of the underlying process, (iv) Monte Carlo realizations constrained by measured data, and (v) simultaneous reconstruction and determination of unknown linear parameters. RP RYBICKI, GB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 16 TC 139 Z9 139 U1 0 U2 7 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 10 PY 1992 VL 398 IS 1 BP 169 EP 176 DI 10.1086/171845 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ397 UT WOS:A1992JQ39700016 ER PT J AU KOCHANEK, CS AF KOCHANEK, CS TI COALESCING BINARY NEUTRON-STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, CLOSE; RADIATION MECHANISMS, GRAVITATIONAL; STARS, INTERIORS; STARS, NEUTRON ID GAMMA-RAY BURSTS; GRAVITATIONAL-RADIATION; TRANSPORT PROPERTIES; DENSE MATTER; MODEL; EVOLUTION; PULSAR; SIMULATIONS; EQUATION; SYSTEMS AB The best models for the internal structure of a coalescing binary neutron star are the irrotational Roche-Riemann ellipsoids (IRREs). The IRREs have tidally locked figures but zero circulation in an inertial frame, and are the result of binary evolution in the absence of viscosity. The IRREs differ markedly from the more familiar Roche ellipsoids: where the fluid is static in the corotating frame for the Roche solution, the fluid counterrotates at the orbital frequency for the IRRE solutions, and where the Roche ellipsoids expand along both principal axes in the orbital plane, the IRREs expand along the separation vector and contract in the orthogonal direction. The structure of the stars begins to deviate from the IRRE structure if the average dynamical shear viscosity is larger than eta greater than or similar to 10(29) g cm-1 s-1, and will begin to approach the Roche solution just before coalescence if eta greater than or similar to 10(31) g cm-1 s-1. Viscosity grows in importance as the orbit shrinks because the strength of the viscous damping grows much more rapidly than gravitational radiation. Plastic or inelastic flow in the sold crust of the star can produce a maximum effective viscosity of eta(crust) approximately 10(28)(10(3)M(c)/M*) (R*/R)3/2 g cm-1 s-1, where M(c) is the mass of the solid crust. While this is still smaller than the estimated critical viscosity for significant deviations from the IRRE structure, it is many orders of magnitude larger than the microscopic viscosity (eta(micro) approximately 10(22) g cm-1 s-1). This suggests that in neutron star binaries, as in normal binaries and accretion disks, anomalous viscosities caused by dynamical processes are much more important than microscopic viscosities. Even so, the viscosity is insufficient to cause significant deviations from the IRRE structure. The structure of the stars has a negligible effect on the instantaneous amplitude of the gravitational waves emitted by the binary, but emission from the quadrupole moments of the stars and orbital precession slightly accelerate the coalescence and cause a monotonically growing phase difference between the true signal and a point mass binary model for the signal. For a coalescencing system like PSR 1913 + 16, the phase difference as a function of orbital radius R is DELTAphi congruent-to 13R(R*/R)5/2 (R*/10 km)5/2, where R* is the neutron star radius. While this is not large enough to interfere with detecting the gravitational waves, it is a measurable effect, and it may allow us to determine the size and approximate structure of the neutron star prior to coalescence. The magnitude of the phase shift grows rapidly if the neutron stars are much larger than R* = 10 km or the viscosity is larger than eta greater than or similar to 10(29) g cm-1 s-1. RP KOCHANEK, CS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,DEPT ASTRON MS51,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 67 TC 224 Z9 224 U1 0 U2 1 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 10 PY 1992 VL 398 IS 1 BP 234 EP 247 DI 10.1086/171851 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ397 UT WOS:A1992JQ39700022 ER PT J AU REISENFELD, DB AF REISENFELD, DB TI DIELECTRONIC RECOMBINATION AS A FUNCTION OF ELECTRIC-FIELD STRENGTH SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC DATA; ATOMIC PROCESSES; SUN, CORONA; SUN, MAGNETIC FIELDS; SUN, UV RADIATION ID ISOELECTRONIC-SEQUENCES; IONS; POLARIZABILITIES; ENHANCEMENT; MICROFIELDS; BEAMS AB Dielectronic recombination (DR) is the dominant recombination mechanism at coronal temperatures and densities. DR proceeds by way of doubly excited levels where the recombining electron is captured into a high nl level. Because the high nl levels are sensitive to modest electric fields, Stark mixing of these levels can lead to a severalfold rate increase. We present a procedure for calculating DR rate coefficients as a function of electric field strength and apply this method to carbon ions. We focus on the competing effects of enhancement by plasma microfields and rate decrease through collisional excitation and ionization. We find that in the case of C3+, a significant rate enhancement results, leading to a reinterpretation of C IV emission-line intensities in the Sun and late-type stars. We further consider how macroscopic electric fields, in particular motional electric fields, can affect DR rate coefficients, demonstrating dramatic rate increases for a number of the carbon ions. RP REISENFELD, DB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RI Reisenfeld, Daniel/F-7614-2015 NR 41 TC 11 Z9 11 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD OCT 10 PY 1992 VL 398 IS 1 BP 386 EP 393 DI 10.1086/171863 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ397 UT WOS:A1992JQ39700034 ER PT J AU ARNAUD, M RAYMOND, J AF ARNAUD, M RAYMOND, J TI IRON IONIZATION AND RECOMBINATION RATES AND IONIZATION EQUILIBRIUM SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC DATA; ATOMIC PROCESSES ID ELECTRON-IMPACT IONIZATION; X-RAY-SPECTRA; LITHIUM ISOELECTRONIC SEQUENCE; DIRAC-FOCK CALCULATIONS; HELIUM-LIKE IONS; NA-LIKE IONS; DIELECTRONIC-RECOMBINATION; RATE COEFFICIENTS; CROSS-SECTIONS; SOLAR-FLARES AB In the past few years important progress has been made on the knowledge of ionization and recombination rates of iron, an astrophysically abundant heavy element and a major impurity in laboratory fusion devices. Detailed calculations of ionization cross sections (direct and excitation autoionization process) and dielectronic recombination rate coefficients have now been performed for the whole iron isonuclear sequence. Crossed beam measurements of ionization cross sections are available for some iron ions. We make a critical review of the existing data on ionization and dielectronic recombination and present new computations of radiative recombination rate coefficients of Fe+14 through Fe+25 using the photoionization cross sections of Clark et al. We provide analytical fits to the recommended data (direct ionization and excitation-autoionization cross sections; radiative and dielectronic recombination rate coefficients). Finally we determine the iron ionic fractions at ionization equilibrium and compare them with previous computations as well as with observational data. RP ARNAUD, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 71 TC 617 Z9 622 U1 0 U2 4 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 10 PY 1992 VL 398 IS 1 BP 394 EP 406 DI 10.1086/171864 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ397 UT WOS:A1992JQ39700035 ER PT J AU VRTILEK, JM GOTTLIEB, CA GOTTLIEB, EW WANG, W THADDEUS, P AF VRTILEK, JM GOTTLIEB, CA GOTTLIEB, EW WANG, W THADDEUS, P TI LABORATORY MEASUREMENT OF THE ROTATIONAL SPECTRUM OF HCCS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, MOLECULES; LINE, IDENTIFICATION; MOLECULAR DATA; MOLECULAR PROCESSES; RADIO LINES, MOLECULAR, INTERSTELLAR ID WAVE SPECTRUM; RADICALS; SPECTROSCOPY; MILLIMETER; PARAMETERS; MOLECULES AB From laboratory measurement of more than 50 lines in the 76-394 GHz range, we have identified the rotational spectrum of the linear HCCS radical in its 2PI ground state. The standard Hamiltonian for an isolated 2PI state fits our measurements to high accuracy-a small fraction of a line width-and the derived spectroscopic constants predict lines of radio astronomical interest to better than 0.1 km s-1, with the exception of hyperfine structure, so far unobserved but probably resolvable in astronomical sources in the lowest frequency rotational transitions. Detections of the isotopic species DCCS, (HCCS)C-13, and (HCC3S)S-34 confirm our identification of HCCS. C1 HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138. RP VRTILEK, JM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 18 TC 29 Z9 29 U1 0 U2 0 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 10 PY 1992 VL 398 IS 1 BP L73 EP L76 DI 10.1086/186580 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ396 UT WOS:A1992JQ39600019 ER PT J AU KNOWLTON, N AF KNOWLTON, N TI CONFUSION OF KINGDOMS SO NATURE LA English DT Letter RP KNOWLTON, N (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD OCT 8 PY 1992 VL 359 IS 6395 BP 488 EP 488 DI 10.1038/359488b0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JR859 UT WOS:A1992JR85900039 ER PT J AU ALPERT, YL AF ALPERT, YL TI NONLINEAR HEATING OF A MAGNETOPLASMA - TEMPERATURE OF THE IONOSPHERE SO AIAA JOURNAL LA English DT Article AB Results of the theoretical study of nonlinear heating of a multicomponent magnetoplasma (of the ionosphere) under the action of an electric field E = E0e(iomegat) are considered in this paper. All of the kinds of collisions between the constituents of the plasma (electrons, ions, neutral particles) and their velocities are taken into account. In some cases the self-consistent solution of the corresponding systems of equations is studied. Numerical results characterize altitude, frequency, and angle dependencies of the temperatures of the ionosphere's constituents in the altitude range Z = 100-1000 km, in the frequency band F = 1-10(4) Hz, and angles theta = 0-90 deg. The temperature of all of the particles increases very quickly with altitude. At Z greater-than-or-equal-to 150 km, the temperatures in the discussed frequency range become larger than the ionization potential, even when the amplitude of the electric field E0 congruent-to 1-2 mV/m. RP ALPERT, YL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD OCT PY 1992 VL 30 IS 10 BP 2440 EP 2446 DI 10.2514/3.11245 PG 7 WC Engineering, Aerospace SC Engineering GA JR887 UT WOS:A1992JR88700011 ER PT J AU MAMAY, SH AF MAMAY, SH TI SPHENOPTERIDIUM AND TELANGIOPSIS IN A DIPLOPTERIDIUM-LIKE ASSOCIATION FROM THE VIRGILIAN (UPPER PENNSYLVANIAN) OF NEW-MEXICO SO AMERICAN JOURNAL OF BOTANY LA English DT Article ID NOV AB The highly fossiliferous Virgilian (Upper Pennsylvanian) shales of the Kinney Brick Company quarry near Albuquerque, New Mexico, contain a diversified flora dominated by walchian conifers and neuropterid pteridosperms. Its other components include a specimen of Telangiopsis sp. and abundant material of Sphenopteridium manzanitanum, n. sp., a highly variable foliar form. Both genera are characteristically restricted to the Upper Mississippian, with the exception of one basal Pennsylvanian occurrence. Their occurrence together in the Kinney sediments and their possession in common of distinctive surficial ornamentation suggest that they represent dissociated parts of Diplopteridium, a very rare European Lower Carboniferous taxon. Other associated plants show later Paleozoic or even Early Mesozoic characteristics, which, together with the Mississippian elements, distinguish the Kinney site as paleobotanically unique. RP MAMAY, SH (reprint author), SMITHSONIAN INST,DEPT PALEOBIOL,WASHINGTON,DC 20560, USA. NR 37 TC 19 Z9 19 U1 0 U2 0 PU BOTANICAL SOC AMER INC PI COLUMBUS PA OHIO STATE UNIV-DEPT BOTANY 1735 NEIL AVE, COLUMBUS, OH 43210 SN 0002-9122 J9 AM J BOT JI Am. J. Bot. PD OCT PY 1992 VL 79 IS 10 BP 1092 EP 1101 DI 10.2307/2445207 PG 10 WC Plant Sciences SC Plant Sciences GA JU847 UT WOS:A1992JU84700002 ER PT J AU BUSER, R KURUCZ, RL AF BUSER, R KURUCZ, RL TI A LIBRARY OF THEORETICAL STELLAR FLUX SPECTRA .1. SYNTHETIC UBVRI PHOTOMETRY AND THE METALLICITY SCALE FOR F-TYPE TO K-TYPE STARS SO ASTRONOMY & ASTROPHYSICS LA English DT Review DE PHOTOMETRY, SYNTHETIC; STARS, ABUNDANCES; STARS, ATMOSPHERES OF; STARS, COLORS OF; STARS, LATE-TYPE; STARS, TEMPERATURES OF ID GLOBULAR-CLUSTER SYSTEM; CHEMICAL-COMPOSITION; TEMPERATURE SCALE; METAL ABUNDANCES; STROMGREN PHOTOMETRY; MODEL ATMOSPHERES; DWARF STARS; GIANT STARS; RED GIANTS; COLORS AB We present synthetic colors on the Johnson Cousins standard UBVRI system of a grid of theoretical model atmosphere flux distributions for late-type stars covering the parameter ranges, 3750 K less-than-or-equal-to T(eff) less-than-or-equal-to 6000 K, 0.75 less-than-or-equal-to log g less-than-or-equal-to 5.25, 0.50 greater-than-or-equal-to [M/H] greater-than-or-equal-to -3.00. These colors are based on new synthetic spectra calculated from the flux-constant, blanketed model atmospheres of Gustafsson et al. (1975) and Eriksson et al. (1979), using the atomic line opacities compiled by Kurucz & Peytremann (1975) and Kurucz (1979a). Our calculations substantially reduce the systematic effects of the "missing ultraviolet opacity " present in the synthetic colors previously computed by Bell & Gustafsson (1978) and by VandenBerg & Bell (1985), who employed the same models but different opacity source input. Despite the neglect of molecular and (still missing) faint atomic lines (Kurucz 1986), our new fluxes provide significantly improved theoretical representations of the observed two-color diagrams and the empirical temperature calibrations for F-, G-, and K-type stars of all luminosities and metallicities. In particular, the ultraviolet excesses as functions of stellar metallicity observed in field dwarfs and giants and in globular clusters are well reproduced by the present theoretical results. In conjunction with Kurucz' (1979a,b) models for O to G stars, the present models for F- to K-stars now provide an extensive, quasi-homogeneous grid of low-resolution theoretical flux spectra for a significant range in stellar parameters covering most of the observed HR diagram. This grid will be particularly useful for the theoretical calibration of other photometric systems and for evolutionary synthesis studies of stellar populations in clusters and galaxies. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP BUSER, R (reprint author), UNIV BASEL, INST ASTRON, VENUSSTR 7, CH-4102 BINNINGEN, SWITZERLAND. NR 109 TC 175 Z9 175 U1 0 U2 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 1992 VL 264 IS 2 BP 557 EP 591 PG 35 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV055 UT WOS:A1992JV05500027 ER PT J AU KOCHANEK, CS AF KOCHANEK, CS TI GRAVITATIONAL LENSES IN REDSHIFT SURVEYS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES; DISTANCES AND REDSHIFTS; GRAVITATIONAL LENSING ID ELLIPTICAL POTENTIAL WELLS; LUMINOSITY FUNCTION; GALAXY; UNIVERSE; QUASARS; DISTRIBUTIONS; STATISTICS AB New gravitational lens systems should be discovered spectroscopically as a by-product of redshift surveys of nearby galaxies. The incidence of lenses is almost independent of the cosmological model, while it is very sensitive to the lens model. In contrast, a survey of quasars for lenses is sensitive to both the cosmological model and the lens model, which renders it difficult to disentangle the two effects. The lens 2237 + 031 was discovered by the CfA redshift survey, although the a posteriori probability of a lens appearing in the CfA redshift survey is only 0.3% in a sample of 10(4) redshifts with limiting magnitude m(B) = 15.2. The frequency of lenses rises rapidly in redshift surveys with fainter limiting magnitudes, with the expected number of lenses per 10(4) redshifts being 0.04 for a limit of m(B) = 17.5, and 0.1 for a limit of m(B) = 19 assuming that a quasar that is DELTAm(B) = 2 magnitudes fainter than the galaxy would be discovered. Each one magnitude increase in DELTAm(B) roughly doubles the expected number of lenses, and the uncertainties due to the model for the lens galaxy are about a factor of 4. In our simple model we predict that the KOSS survey should find 0.2 unlensed quasars (assuming no extra magnification of singly imaged quasars), 0.04-0.4 lensed quasars depending on the lens model, and 0.5 galactic stars per 10(4) measured redshifts. RP KOCHANEK, CS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,DEPT ASTRON,MS-51,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 41 TC 17 Z9 17 U1 0 U2 0 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 1 PY 1992 VL 397 IS 2 BP 381 EP 389 DI 10.1086/171794 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ075 UT WOS:A1992JQ07500003 ER PT J AU STRAUSS, MA YAHIL, A DAVIS, M HUCHRA, JP FISHER, K AF STRAUSS, MA YAHIL, A DAVIS, M HUCHRA, JP FISHER, K TI A REDSHIFT SURVEY OF IRAS GALAXIES .5. THE ACCELERATION ON THE LOCAL GROUP SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; GALAXIES, DISTANCES AND REDSHIFTS; INFRARED, GALAXIES; LOCAL GROUP ID OPTICAL DIPOLE ANISOTROPY; PECULIAR VELOCITY-FIELD; LARGE-SCALE STRUCTURE; COLD DARK MATTER; X-RAY-CLUSTERS; COSMOLOGICAL MODELS; LUMINOSITY FUNCTION; DISTANCE RELATION; DENSITY FIELDS; MOTION AB We calculate the acceleration on the Local Group from a full-sky redshift survey of 5288 galaxies detected by the Infrared Astronomical Satellite (IRAS). The median redshift of the sample is almost-equal-to 4500 km s-1; however, there is useful information on the acceleration to almost-equal-to 20,000 km s-1. We develop a formalism to compute the distribution function of the IRAS acceleration for a given power spectrum of initial perturbations, which includes the effects of shot noise, the finite window through which the acceleration is measured, and nonlinear effects on small scales. This distribution is very broad, which means that a value of beta = OMEGA0.6/b calculated by simply taking the ratio of the cosmic microwave background (CMB) dipole to the IRAS acceleration will be uncertain by a factor of 2 or more. The computed acceleration on the Local Group points 18-degrees-28-degrees from the direction of the Local Group peculiar velocity vector, depending on the model used for the velocity field, and the window through which the acceleration is measured. The convergence of the acceleration vector on large scales depends strongly on the correction made for the motion of the Local Group, an effect first recognized by Kaiser. This limits our ability to rule out contributions to the acceleration on large scales, although the data are consistent with the acceleration being due mostly to galaxies within 4000 km s-1 of the Local Group. The data suggest that the CMB dipole is indeed due to the motion of the Local Group, that this motion is gravitationally induced, and that the distribution of IRAS galaxies on large scales is related to that of dark matter by a simple linear biasing model. The fact that IRAS galaxies underestimate the density of rich cluster cores affects the acceleration calculation at only the 10% level. A maximum-likelihood fit of different power spectra to the growth of the acceleration allows us to solve for beta. The quantity beta is constrained to lie between 0.4 and 0.85 (1 sigma), and is rather insensitive to the power spectrum assumed. Our data favor cold dark matter over a baryon dark matter isocurvature model. Similarly, a power-law power spectrum cannot have a break on scales below 1800 km s-1. These results are consistent with measurements of the dipole moment of optically selected galaxies; there is no need for strong relative biasing between IRAS and optically selected galaxies. We test the power of our techniques with the aid of N-body simulations. C1 CALTECH,DEPT ASTRON,PASADENA,CA 91125. SUNY STONY BROOK,ASTRON PROGRAM,STONY BROOK,NY 11794. OBSERV PARIS,DEPT ASTROPHYS EXTRAGALACT & COSMOL,F-92195 MEUDON,FRANCE. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 81 TC 143 Z9 143 U1 0 U2 1 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 1 PY 1992 VL 397 IS 2 BP 395 EP 419 DI 10.1086/171796 PN 1 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ075 UT WOS:A1992JQ07500005 ER PT J AU GOMEZ, JF TORRELLES, JM ESTALELLA, R ANGLADA, G VERDESMONTENEGRO, L HO, PTP AF GOMEZ, JF TORRELLES, JM ESTALELLA, R ANGLADA, G VERDESMONTENEGRO, L HO, PTP TI ON THE NATURE OF THE BIPOLAR MOLECULAR OUTFLOW IN AFGL-437 SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-II REGIONS; ISM, INDIVIDUAL (AFGL-437); MASERS; ISM, JETS AND OUTFLOWS ID INFRARED SOURCE GL-437; CLOUDS AB With the IRAM 30 m telescope we have observed the CO(J = 2 --> 1), (CO)-C-13(J = 1 --> 0), and (CO)-O-18(J = 1 --> 0) rotational transition lines toward the AFGL 437 cluster. Our data show a molecular outflow with a north-south bipolarity. This bipolarity is observed in the three lines. An interesting result is that the blue and redshifted lobes are not elongated in the direction of the outflow axis, but in the east-west direction, perpendicularly to the outflow axis. Therefore, AFGL 437 appears to be an outflow with a clear bipolarity, but with a very low collimation. We propose a geometrical model in which the observed bipolar outflow is produced by a laminar flow of dragged molecular gas along the walls of a cavity or hollow, near the edge of the molecular cloud, opened by the stellar winds of the AFGL 437 cluster. C1 CSIC,INST ASTROFIS ANDALUCIA,E-18080 GRANADA,SPAIN. UNIV BARCELONA,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. RP GOMEZ, JF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Gomez, Jose Francisco/D-8392-2016; OI Gomez, Jose Francisco/0000-0002-7065-542X; Torrelles, Jose Maria/0000-0002-6896-6085 NR 20 TC 17 Z9 17 U1 0 U2 0 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 1 PY 1992 VL 397 IS 2 BP 492 EP 499 DI 10.1086/171806 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ075 UT WOS:A1992JQ07500015 ER PT J AU BLOEMHOF, EE REID, MJ MORAN, JM AF BLOEMHOF, EE REID, MJ MORAN, JM TI KINEMATICS OF W3(OH) - 1ST PROPER MOTIONS OF OH MASERS FROM VLBI MEASUREMENTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (W3); ISM, KINEMATICS AND DYNAMICS; MAGNETIC FIELDS; MASERS; TECHNIQUES, INTERFEROMETRIC ID H-II REGIONS; W3 OH; GALAXY; CLOUDS; MODEL; LINES AB We have measured the relative proper motions of the 1665 MHz OH maser spots in W3(OH) by comparing data from VLBI (very long baseline interferometric) experiments at epochs 1978 and 1986. Most maser spots are found to persist with similar spatial morphologies, so they can be tracked from one epoch to the next without ambiguity. We find a significant ordered motion with apparent transverse velocities of a few km s-1, providing important direct information about the kinematics in the immediate vicinity of a recently formed massive star. The possibility that the OH maser spots are in a collapsing circumstellar envelope, as suggested by previous investigators, is definitively ruled out. The observed pattern of motions is generally suggestive of expansion from the ultracompact H II region seen in radio continuum emission. Alternatively, because the absolute motion of the maser spots with respect to the ultracompact H II region is not measured, a velocity field resembling that expected for a cometary bow shock is consistent with our data. Significant temporal variations of the strengths of maser spots were measured. By analyzing the line-of-sight velocities of spatially coincident maser spots of opposite circular polarizations in terms of Zeeman splitting, a map of the magnetic field in the OH maser clusters of W3(OH) is also obtained. Magnetic field strengths are typically 4 mG, with significant variations at different positions in the source. RP BLOEMHOF, EE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 34 TC 79 Z9 79 U1 0 U2 0 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 1 PY 1992 VL 397 IS 2 BP 500 EP 519 DI 10.1086/171807 PN 1 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ075 UT WOS:A1992JQ07500016 ER PT J AU WILKING, BA GREENE, TP LADA, CJ MEYER, MR YOUNG, ET AF WILKING, BA GREENE, TP LADA, CJ MEYER, MR YOUNG, ET TI IRAS OBSERVATIONS OF YOUNG STELLAR OBJECTS IN THE CORONA AUSTRALIS DARK CLOUD SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, STARS; ISM, CLOUDS; ISM, INDIVIDUAL (CORONA AUSTRALIS CLOUD); STARS, PRE-MAIN-SEQUENCE ID FAR-INFRARED OBSERVATIONS; T-TAURI STARS; RHO-OPHIUCHI; MOLECULAR CLOUD; CLUSTER; ASSOCIATION; EVOLUTION; COMPLEXES; VICINITY; AUSTRINA AB We present an analysis of IRAS data for a 57 pc2 area of the nearby Corona Australis dark cloud complex. A total of 79 far-infrared sources are detected at 12 mum or in at least three IRAS bands. Combining these data with both newly obtained and previously published optical/infrared data, a total of 16 IRAS sources are identified with young stellar objects which are in close proximity to the R Coronae Australis cloud or Rossano Cloud B. Among these objects is a cold, heavily obscured young stellar object, IRAS 32, which radiates only in the 25-100 mum bands and is found to be associated with an extended near-infrared nebula. The majority of the remaining 63 IRAS sources in our sample appear to be related to field stars. A total of 24 young stellar objects are now known to be associated with the Cr A cloud and we investigate their collective properties through analysis of their spectral energy distributions. As observed for embedded populations in other dark clouds, the shapes of the spectral energy distributions constitute a nearly continuous sequence from cold, heavily obscured objects (extreme Class I) to T Tauri stars (Class II), with about equal numbers of Class I and Class II sources. There is a hint of a segregation of the shapes of the spectral energy distributions with source luminosity: eight of nine sources with L > 1.8 L. display Class I or flat energy distributions. We conclude that star formation in the Cr A cloud has proceeded in a manner similar to that in the rho Ophiuchi cloud in terms of duration and efficiency. We attribute the relatively low number of young stellar objects in Cr A to its lower mass of both low-density and high-density molecular gas. The luminosity function of the Cr A sources is unique only by the presence of six intermediate-luminosity (approximately 100 L.) objects. Either the cloud has formed intermediate-mass stars more efficiently than lower mass objects relative to other dark clouds or several of these objects are interlopers. C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. RP WILKING, BA (reprint author), UNIV MISSOURI,DEPT PHYS & ASTRON,8001 NAT BRIDGE RD,ST LOUIS,MO 63121, USA. NR 44 TC 60 Z9 60 U1 0 U2 1 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 1 PY 1992 VL 397 IS 2 BP 520 EP 533 DI 10.1086/171808 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ075 UT WOS:A1992JQ07500017 ER PT J AU CLAYTON, GC WHITNEY, BA STANFORD, SA DRILLING, JS AF CLAYTON, GC WHITNEY, BA STANFORD, SA DRILLING, JS TI OBSERVATIONS OF R-CORONAE-BOREALIS STARS IN DECLINE - EMPIRICAL ARGUMENTS FOR DUST FORMATION NEAR THE STELLAR SURFACE SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; DUST, EXTINCTION; STARS, VARIABLES; OTHER (R-CORONAE BOREALIS); ULTRAVIOLET, STARS ID ULTRAVIOLET; SAGITTARII; SGR AB We present new IUE observations which monitor the spectroscopic evolution of RY Sgr through a deep decline. These data, along with other IUE, visible, and infrared observations of declines in RY Sgr, R CrB, and V854 Cen, are considered in an attempt to understand the dust formation process and the source of the narrow- and broad-line emission seen during declines. Spectroscopic, photometric, and polarimetric data covering 10 declines of these stars have been analyzed. The evolution of the UV emission spectrum is similar to that found in the visible. Previous models of dust formation assume that dust forms around 20 stellar radii, where gas ejected from the star is cool enough to condense. However, the spectral evolution, and the dispersal times of dust implied by the light curve are consistent with dust forming within a few stellar radii and moving outward due to radiation pressure. The expanding dust cloud eclipses the photosphere and parts of the emission line region, causing the observed spectral evolution. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803. RP CLAYTON, GC (reprint author), UNIV COLORADO,CTR ASTROPHYS & SPACE ASTRON,CAMPUS BOX 389,BOULDER,CO 80309, USA. NR 47 TC 41 Z9 41 U1 0 U2 0 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 1 PY 1992 VL 397 IS 2 BP 652 EP 663 DI 10.1086/171821 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JQ075 UT WOS:A1992JQ07500030 ER PT J AU PARKER, GG SMITH, AP HOGAN, KP AF PARKER, GG SMITH, AP HOGAN, KP TI ACCESS TO THE UPPER FOREST CANOPY WITH A LARGE TOWER CRANE SO BIOSCIENCE LA English DT Article ID CHLOROPHYLL FLUORESCENCE; XANTHOPHYLL CYCLE; PHOTOSYNTHESIS; LIGHT; LEAVES C1 SMITHSONIAN TROP RES INST,UNIT 0948,APO,MIAMI,FL 34002. RP PARKER, GG (reprint author), SMITHSONIAN ENVIRONM RES CTR,EDGEWATER,MD 21037, USA. NR 37 TC 68 Z9 76 U1 1 U2 7 PU AMER INST BIOLOGICAL SCI PI WASHINGTON PA 1444 EYE ST, NW, STE 200, WASHINGTON, DC 20005 SN 0006-3568 J9 BIOSCIENCE JI Bioscience PD OCT PY 1992 VL 42 IS 9 BP 664 EP 670 DI 10.2307/1312172 PG 7 WC Biology SC Life Sciences & Biomedicine - Other Topics GA JQ822 UT WOS:A1992JQ82200003 ER PT J AU BAUR, B DIETZ, KJ WINTER, K AF BAUR, B DIETZ, KJ WINTER, K TI REGULATORY PROTEIN-PHOSPHORYLATION OF PHOSPHOENOLPYRUVATE CARBOXYLASE IN THE FACULTATIVE CRASSULACEAN-ACID-METABOLISM PLANT MESEMBRYANTHEMUM-CRYSTALLINUM L SO EUROPEAN JOURNAL OF BIOCHEMISTRY LA English DT Article ID POLYACRYLAMIDE-GEL ELECTROPHORESIS; BRYOPHYLLUM-FEDTSCHENKOI; CIRCADIAN-RHYTHMS; SENSITIVITY; MALATE; MAIZE; KINASE; STATE; INHIBITION; INDUCTION AB Phosphoenolpyruvate PyrP carboxylase (PyrPC) and PyrPC kinase were copurified from dark-adapted leaves of the common ice plant Mesembryanthemum crystallinum L. with crassulacean-acid metabolism (CAM). Purification by (NH4)2SO4 fractionation, chromatography on Fractogel-DEAE and hydroxylapatite resulted in a PyrPC preparation with a specific activity of 23 - 25 U/mg protein and a protein kinase activity of 255 mumol P(i) . mol-1 PyrPC 1 s-1. After in vitro phosphorylation, the most prominently phosphorylated polypeptide was identified as PyrPC by immunoblotting and sequencing. Phosphorylation of PyrPC in vitro by incubation with 400 muM MgATP decreased its sensitivity towards malate. When purified in the absence of the protease inhibitor chymostatin, PyrPC lost an N-terminal sequence of 128 amino acids. Although the carboxylation reaction was unaffected, the truncated PyrPC could neither be phosphorylated in vitro nor inhibited by malate. This result and data obtained by limited proteolysis concur with the hypothesis [Jiao, J.-A. & Chollet, R. (1989) Arch. Biochem. Biophys. 283, 300 - 305] that Ser11 is the phosphorylation site of the CAM PyrPC of M. crystallinum. At pH 7.0, the K(m) for ATP of the protein kinase was 25 muM; phosphorylation of PyrPC was maximal after 30 min at pH 7.0. The kinase showed also activity with histone III-S but not with dephosphorylated casein. It was inhibited by malate. The results show, that reversible protein phosphorylation is an important factor in the regulation of PyrPC in the facultative CAM plant M. crystallinum, similar to C4 and constitutive CAM plants. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP BAUR, B (reprint author), JULIUS VON SACHS INST BIOWISSENSCH,MITTLERER DALLENBERGWEG 64,W-8700 WURZBURG,GERMANY. RI Dietz, Karl-Josef/B-6029-2009 NR 37 TC 42 Z9 42 U1 0 U2 0 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 OCT 1 PY 1992 VL 209 IS 1 BP 95 EP 101 DI 10.1111/j.1432-1033.1992.tb17265.x PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JT116 UT WOS:A1992JT11600012 PM 1396723 ER PT J AU MINK, DJ MAENE, S FRENCH, RG KLEMOLA, AR AF MINK, DJ MAENE, S FRENCH, RG KLEMOLA, AR TI OCCULTATIONS OF FAINT STARS BY NEPTUNE AND ITS RINGS - 1992-1999 SO ICARUS LA English DT Article; Proceedings Paper CT NEPTUNE / TRITON CONF CY JAN 06-10, 1992 CL TUCSON, AZ ID URANUS; VOYAGER-2; SYSTEM C1 WELLESLEY COLL,WELLESLEY,MA 02181. UNIV CALIF SANTA CRUZ,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,MT HAMILTON,CA 95140. RP MINK, DJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 21 TC 1 Z9 1 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD OCT PY 1992 VL 99 IS 2 BP 430 EP 435 DI 10.1016/0019-1035(92)90158-4 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JW591 UT WOS:A1992JW59100016 ER PT J AU STANTON, M PHILLIPS, W LI, YL KALATA, K AF STANTON, M PHILLIPS, W LI, YL KALATA, K TI THE DETECTIVE QUANTUM EFFICIENCY OF CCD AND VIDICON-BASED DETECTORS FOR X-RAY CRYSTALLOGRAPHIC APPLICATIONS SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article AB The detective quantum efficiency (DQE) characterizes the measurement uncertainty introduced by a detector. A formulation of the DQE for CCD and vidicon-based X-ray integrating detectors is developed and illustrated with five model detectors. A comparison of the calculated and measured DQEs for two of these detectors is presented. From an examination of the DQEs for the model detectors, generalizations are made regarding detector designs. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP STANTON, M (reprint author), BRANDEIS UNIV,ROSENSTIEL BASIC MED SCI RES CTR,WALTHAM,MA 02254, USA. NR 23 TC 24 Z9 24 U1 0 U2 1 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD OCT 1 PY 1992 VL 25 BP 638 EP 645 DI 10.1107/S0021889892005211 PN 5 PG 8 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA JU417 UT WOS:A1992JU41700013 ER PT J AU STARK, G SMITH, PL HUBER, KP YOSHINO, K STEVENS, MH ITO, K AF STARK, G SMITH, PL HUBER, KP YOSHINO, K STEVENS, MH ITO, K TI ABSORPTION-BAND OSCILLATOR-STRENGTHS OF N2 TRANSITIONS BETWEEN 95.8 AND 99.4 NM SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID EXTREME ULTRAVIOLET EMISSION; VUV SPECTROSCOPIC FACILITY; ELECTRON-IMPACT; MOLECULAR NITROGEN; CROSS-SECTIONS; HOMOGENEOUS PERTURBATION; B'(1)1SIGMAU(+) LEVELS; MEDIUM-RESOLUTION; UPPER-ATMOSPHERE; N-2 AB Photoabsorption cross sections for seven electric dipole-allowed N2 bands, at wavelengths between 95.8 and 99.4 nm, have been measured with an instrumental resolution of 6.2 X 10(-4) nm. Integrated cross sections and band oscillator strengths are presented for the c4' 1SIGMA(u)+(v' = 0)-X 1SIGMA(g)'(v" = 0) and c3 1PI(u)(v' = 0)-X 1SIGMA(g)+(v" = 0) transitions, as well as for five bands (v'= 0,1,2,3,4) in the b 1PI(u)(v')-X 1SIGMA(g)+(0) progression. The results are compared with earlier, lower resolution absorption measurements, electron scattering measurements, and calculations based on a deperturbation analysis of the excited states. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NATL RES COUNCIL CANADA,HERZBERG INST ASTROPHYS,OTTAWA K1A 0R6,ONTARIO,CANADA. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. NATL LAB HIGH ENERGY PHYS,PHOTON FACTORY,OHO,IBARAKI 305,JAPAN. RP STARK, G (reprint author), WELLESLEY COLL,DEPT PHYS,WELLESLEY,MA 02181, USA. OI Stevens, Michael/0000-0003-1082-8955 NR 38 TC 35 Z9 35 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD OCT 1 PY 1992 VL 97 IS 7 BP 4809 EP 4814 DI 10.1063/1.463835 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA JR338 UT WOS:A1992JR33800023 ER PT J AU OLMSTED, RA LANGLEY, R ROELKE, ME GOEKEN, RM ADGERJOHNSON, D GOFF, JP ALBERT, JP PACKER, C LAURENSON, MK CARO, TM SCHEEPERS, L WILDT, DE BUSH, M MARTENSON, JS OBRIEN, SJ AF OLMSTED, RA LANGLEY, R ROELKE, ME GOEKEN, RM ADGERJOHNSON, D GOFF, JP ALBERT, JP PACKER, C LAURENSON, MK CARO, TM SCHEEPERS, L WILDT, DE BUSH, M MARTENSON, JS OBRIEN, SJ TI WORLDWIDE PREVALENCE OF LENTIVIRUS INFECTION IN WILD FELINE SPECIES - EPIDEMIOLOGIC AND PHYLOGENETIC ASPECTS SO JOURNAL OF VIROLOGY LA English DT Article ID SIMIAN IMMUNODEFICIENCY VIRUSES; AFRICAN-GREEN MONKEYS; SEROEPIDEMIOLOGIC SURVEY; NUCLEOTIDE-SEQUENCE; GENOME ORGANIZATION; GENETIC DIVERSITY; CERCOCEBUS-ATYS; ORIGINS; RETROVIRUSES; ANTIBODIES AB The natural occurrence of lentiviruses closely related to feline immunodeficiency virus (FIV in nondomestic felid species is shown here to be worldwide. Cross-reactive antibodies to FIV were common in several free-ranging populations of large cats, including East African lions and cheetahs of the Serengeti ecosystem and in puma (also called cougar or mountain lion) populations throughout North America. Infectious puma lentivirus (PLV) was isolated from several Florida panthers, a severely endangered relict puma subspecies inhabiting the Big Cypress Swamp and Everglades ecosystems in southern Florida. Phylogenetic analysis of PLV genomic sequences from disparate geographic isolates revealed appreciable divergence from domestic cat FIV sequences as well as between PLV sequences found in different North American locales. The level of sequence divergence between PLV and FIV was greater than the level of divergence between human and certain simian immunodeficiency viruses, suggesting that the transmission of FIV between feline species is infrequent and parallels in time the emergence of HIV from simian ancestors. C1 NCI,FREDERICK CANC RES & DEV CTR,VIRAL CARCINOGENESIS LAB,FREDERICK,MD 21702. GEORGETOWN UNIV,DEPT MICROBIOL,DIV MOLEC VIROL & IMMUNOL,WASHINGTON,DC 20057. NIAID,INFECT DIS LAB,ROCKVILLE,MD 20852. FLORIDA GAME & FRESHWATER FISH COMMISS,WILDLIFE RES LAB,GAINESVILLE,FL 32601. UNIV MINNESOTA,DEPT ECOL & BEHAV BIOL,MINNEAPOLIS,MN 55455. UNIV CAMBRIDGE,DEPT ZOOL,CAMBRIDGE CB2 3EJ,ENGLAND. UNIV CALIF DAVIS,DEPT WILDLIFE & FISHERIES BIOL,DAVIS,CA 95616. ETOSHA ECOL INST,OUTJO,NAMIBIA. SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008. FU NIAID NIH HHS [N01-AI-72623] NR 47 TC 139 Z9 139 U1 2 U2 10 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0022-538X J9 J VIROL JI J. Virol. PD OCT PY 1992 VL 66 IS 10 BP 6008 EP 6018 PG 11 WC Virology SC Virology GA JN267 UT WOS:A1992JN26700034 PM 1382145 ER PT J AU COFFROTH, MA LASKER, HR DIAMOND, ME BRUENN, JA BERMINGHAM, E AF COFFROTH, MA LASKER, HR DIAMOND, ME BRUENN, JA BERMINGHAM, E TI DNA FINGERPRINTS OF A GORGONIAN CORAL - A METHOD FOR DETECTING CLONAL STRUCTURE IN A VEGETATIVE SPECIES SO MARINE BIOLOGY LA English DT Article ID ANEMONE METRIDIUM-SENILE; BREEDING-SYSTEM VARIATION; ASEXUAL REPRODUCTION; GENETIC-STRUCTURE; POPULATION-STRUCTURE; ACTINIA-TENEBROSA; SELF-RECOGNITION; DAPHNIA-PULEX; DIVERSITY; SPONGES AB Clonal reproduction, a common life history strategy among sessile marine invertebrates, can lead to high local abundances of one to a few genotypes in a population. Analysis of the clonal structure of such populations can provide insight into the ecological and evolutionary history of the population, but requires markers that can identify individual genets. Forensic and demographic studies have demonstrated that DNA fingerprinting can provide markers that are unique for an individual genotype. We have generated DNA fingerprints for over 70 colonies of the clonal gorgonian, Plexaura A (Plexaura sp. A) collected from June 1990 through July 1991 in the San Blas Islands, Panama. DNA fingerprints within a single individual were identical and fingerprinting resolved multiple genotypes within and among reefs. On one reef in the San Blas Islands, Panama, 59 % of the colonies sampled were of one genotype and this genotype was not found on any other sampled reefs. A previous study using tissue grafts identified 13 putative clones on these reefs, while DNA fingerprints of the same colonies differentiated 17 genotypes. The present study demonstrates the utility of DNA fingerprinting for distinguishing clones and for identifying clonal structure of marine invertebrate populations. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP COFFROTH, MA (reprint author), SUNY BUFFALO,DEPT BIOL SCI,BUFFALO,NY 14260, USA. NR 55 TC 112 Z9 114 U1 0 U2 10 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0025-3162 J9 MAR BIOL JI Mar. Biol. PD OCT PY 1992 VL 114 IS 2 BP 317 EP 325 DI 10.1007/BF00349534 PG 9 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA JV690 UT WOS:A1992JV69000018 ER PT J AU TAYLOR, L AF TAYLOR, L TI NEW-MEXICO TINWORK, 1840-1940 - COULTER,L, DIXON,M SO NEW MEXICO HISTORICAL REVIEW LA English DT Book Review RP TAYLOR, L (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV NEW MEXICO PI ALBUQUERQUE PA NEW MEXICO HIST REV MESA VISTA 1013, ALBUQUERQUE, NM 87131 SN 0028-6206 J9 NEW MEX HIST REV JI N. M. Hist. Rev. PD OCT PY 1992 VL 67 IS 4 BP 424 EP 425 PG 2 WC History SC History GA JZ288 UT WOS:A1992JZ28800013 ER PT J AU MELDER, K AF MELDER, K TI THE CREATION OF WASHINGTON, DC - THE IDEA AND LOCATION OF THE AMERICAN CAPITAL - BOWLING,KR SO NEW YORK HISTORY LA English DT Book Review RP MELDER, K (reprint author), SMITHSONIAN INST,DIV POLIT SCI,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK STATE HIST ASSN PI COOPERSTOWN PA PO BOX 800, COOPERSTOWN, NY 13326-0800 SN 0146-437X J9 NEW YORK HIST JI N. Y. Hist. PD OCT PY 1992 VL 73 IS 4 BP 472 EP 474 PG 3 WC History SC History GA KN581 UT WOS:A1992KN58100009 ER PT J AU EBERHARD, WG AF EBERHARD, WG TI COPULATORY COURTSHIP AND NOTES ON THE NATURAL-HISTORY OF OCHTHERA-OCCIDENTALIS CLAUSEN (DIPTERA, EPHYDRIDAE) SO PAN-PACIFIC ENTOMOLOGIST LA English DT Article DE OCHTHERA-OCCIDENTALIS; EPHYDRID FLY; COPULATORY COURTSHIP; BEHAVIOR; SEXUAL SELECTION AB Male Ochthera occidentalis court females both before and during copulation. The raptorial forelegs, which are relatively longer in males than in females, are used in aggressive displays. RP EBERHARD, WG (reprint author), UNIV COSTA RICA, SMITHSONIAN TROP RES INST, CIUDAD UNIV, SAN JOSE, COSTA RICA. NR 0 TC 5 Z9 5 U1 0 U2 2 PU PACIFIC COAST ENTOMOL SOC PI SAN FRANCISCO PA C/O CALIFORNIA ACADEMY SCIENCES, 875 HOWARD STREET, SAN FRANCISCO, CA 94103-3009 USA SN 0031-0603 J9 PAN-PAC ENTOMOL JI Pan-Pacific Entomol. PD OCT PY 1992 VL 68 IS 4 BP 261 EP 267 PG 7 WC Entomology SC Entomology GA KB297 UT WOS:A1992KB29700004 ER PT J AU LONG, SP NIE, GY BAKER, NR DRAKE, BG FARAGE, PK HENDREY, G LEWIN, KH AF LONG, SP NIE, GY BAKER, NR DRAKE, BG FARAGE, PK HENDREY, G LEWIN, KH TI THE IMPLICATIONS OF CONCURRENT INCREASES IN TEMPERATURE, CO2 AND TROPOSPHERIC O-3 FOR TERRESTRIAL C-3 PHOTOSYNTHESIS SO PHOTOSYNTHESIS RESEARCH LA English DT Meeting Abstract C1 SMITHSONIAN ENV RES CTR,EDGEWATER,MD 21037. UNIV ESSEX,DEPT BIOL,COLCHESTER CO4 3SQ,ESSEX,ENGLAND. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11975. RI Long, Stephen/A-2488-2008 OI Long, Stephen/0000-0002-8501-7164 NR 0 TC 5 Z9 5 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PD OCT PY 1992 VL 34 IS 1 BP 108 EP 108 PG 1 WC Plant Sciences SC Plant Sciences GA JV848 UT WOS:A1992JV84800111 ER PT J AU MOORE, RA SCOTT, TC AF MOORE, RA SCOTT, TC TI QUANTIZATION OF SECOND-ORDER LAGRANGIANS - THE FOKKER-WHEELER-FEYNMAN MODEL OF ELECTRODYNAMICS SO PHYSICAL REVIEW A LA English DT Article ID ELECTROMAGNETIC-INTERACTIONS; TH COLLISIONS; U-U; POSITRON; SCATTERING; RESONANCES; SEARCH; LINES AB The consequences of quantizing the Fokker-Wheeler-Feynman model of electrodynamics, treating the Lagrangian via its acceleration-dependent (1/c) power-series representation, is examined using recently validated methods. An exact treatment of this acceleration dependence yields, under certain circumstances, high-energy resonant modes. In the past, such modes have been assumed unphysical and have been removed by perturbative or order-reduction techniques. However, these modes appear to be of physical significance. This conclusion follows because this completely "ab initio" calculation, with no adjustable parameters, has a number of successes. It provides a description for resonances observed in the electron-positron emission from heavy-ion collisions, in particular, and in diproton collisions and, possibly, in other collision experiments as well. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP MOORE, RA (reprint author), UNIV WATERLOO,GUELPH WATERLOO PROGRAM GRAD WORK PHYS,WATERLOO CAMPUS,WATERLOO N2L 3G1,ONTARIO,CANADA. NR 40 TC 7 Z9 7 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD OCT 1 PY 1992 VL 46 IS 7 BP 3637 EP 3645 DI 10.1103/PhysRevA.46.3637 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JV109 UT WOS:A1992JV10900013 ER PT J AU ZYGELMAN, B COOPER, DL FORD, MJ DALGARNO, A GERRATT, J RAIMONDI, M AF ZYGELMAN, B COOPER, DL FORD, MJ DALGARNO, A GERRATT, J RAIMONDI, M TI CHARGE-TRANSFER OF N-4+ WITH ATOMIC-HYDROGEN SO PHYSICAL REVIEW A LA English DT Article ID VALENCE-BOND THEORY; POTENTIAL-ENERGY CURVES; ELECTRON-CAPTURE AB State-dependent cross sections and rate coefficients for the charge-transfer process N4++H --> N3+(2s3l) + H+ for l = s,p,d in the collision-energy range from 0. 1 eV to 8 keV are presented. A close-coupled quantum-mechanical method is employed, and it is argued that the molecular-state expansion method without translation factors is a valid low-energy approximation for charge-transfer processes. We show that the method does not suffer from the electron-origin problem. The spin-coupled valence-bond method is used to construct both ab initio potential curves and adiabatic coupling elements. The calculated cross sections exhibit variations with energy, which we propose are a manifestation of Stueckelberg oscillations. The cross sections are compared with measured total cross sections for electron capture by N4+ ions in collisions with hydrogen. Agreement is excellent in the collision-energy range from 4.1 to 182 eV/amu. C1 UNIV LIVERPOOL,DEPT CHEM,LIVERPOOL L69 3BX,ENGLAND. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV BRISTOL,SCH CHEM,BRISTOL BS8 1TS,AVON,ENGLAND. UNIV MILANO,DIPARTIMENTO CHIM FIS & ELETTROCHIM,I-20133 MILAN,ITALY. RP ZYGELMAN, B (reprint author), UNIV NEVADA,DEPT PHYS,LAS VEGAS,NV 89154, USA. NR 22 TC 81 Z9 82 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD OCT 1 PY 1992 VL 46 IS 7 BP 3846 EP 3854 DI 10.1103/PhysRevA.46.3846 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JV109 UT WOS:A1992JV10900036 ER PT J AU DALGARNO, A SADEGHPOUR, HR AF DALGARNO, A SADEGHPOUR, HR TI DOUBLE PHOTOIONIZATION OF ATOMIC HELIUM AND ITS ISOELECTRONIC PARTNERS AT X-RAY-ENERGIES SO PHYSICAL REVIEW A LA English DT Note AB A simple and accurate procedure for calculating the rate of double photoionization of "two-electron" systems at very high photon energies is presented. Arguments are given to support the validity of the method used. In particular, we show that the many-body perturbation theory diagrams depend asymptotically on the choice of the gauge for the electric dipole operator. The ratio of double-to-single ionization is calculated to be 1.68% in agreement with the recent synchrotron measurements. For H- and Li+, we predict ratios of 1.51% and 0.89%, respectively. RP DALGARNO, A (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 15 TC 125 Z9 126 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD OCT 1 PY 1992 VL 46 IS 7 BP R3591 EP R3993 PG 403 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JV109 UT WOS:A1992JV10900003 ER PT J AU AGORAMOORTHY, G RUDRAN, R AF AGORAMOORTHY, G RUDRAN, R TI ADOPTION IN FREE-RANGING RED HOWLER MONKEYS, ALOUATTA-SENICULUS OF VENEZUELA SO PRIMATES LA English DT Note DE ADOPTION; KIN-RELATION; RED HOWLERS; ALOUATTA-SENICULUS ID INFANT AB This report describes three cases of infant adoption in red howler monkeys (Alouatta seniculus) of Venezuela. In one case, a lactating female adopted her infant granddaughter after the infant's mother disappeared and the infant survived for the next 25 months. In the second case, an adult female adopted her infant granddaughter for nine days while the infant's mother was still a group member. In the third case, a nulliparous female temporarily adopted an infant from a neighboring group. The details and the possible reasons for these adoption are described. C1 FPM,RED HOWLER PROJECT,CALABOZO 2312A,VENEZUELA. RP AGORAMOORTHY, G (reprint author), SMITHSONIAN INST,NATL ZOOL PK,CTR CONSERVAT & RES,FRONT ROYAL,VA 22630, USA. NR 29 TC 12 Z9 14 U1 2 U2 5 PU JAPAN MONKEY CENTRE PI INUYAMA AICHI PA PRIMATES, EDITORIAL OFFICE, INUYAMA AICHI 484, JAPAN SN 0032-8332 J9 PRIMATES JI Primates PD OCT PY 1992 VL 33 IS 4 BP 551 EP 555 DI 10.1007/BF02381155 PG 5 WC Zoology SC Zoology GA JW983 UT WOS:A1992JW98300008 ER PT J AU NICKLE, DA AF NICKLE, DA TI SCAPTERISCUS-BORELLII GIGLIO-TOS - THE CORRECT SPECIES NAME FOR THE SOUTHERN MOLE CRICKET IN SOUTHEASTERN UNITED-STATES (ORTHOPTERA, GRYLLOTALPIDAE) SO PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON LA English DT Article DE MOLE CRICKET; SCAPTERISCUS; GRYLLOTALPIDAE AB Scapteriscus acletus Rehn and Hebard, 1916, the Southern Mole Cricket, is made a synonym of S. borellii Giglio-Tos, 1891, based on examination of types and fieldwork in the United States and Argentina. RP NICKLE, DA (reprint author), US NATL MUSEUM NAT HIST,SMITHSONIAN INST,USDA,ARS,PSI,SYSTEMAT ENTOMOL LAB,NHB 168,WASHINGTON,DC 20560, USA. NR 0 TC 5 Z9 6 U1 0 U2 0 PU ENTOMOL SOC WASHINGTON PI WASHINGTON PA SMITHSONIAN INSTITUTION DEPT ENTOMOLOGY, WASHINGTON, DC 20560 SN 0013-8797 J9 P ENTOMOL SOC WASH JI Proc. Entomol. Soc. Wash. PD OCT PY 1992 VL 94 IS 4 BP 524 EP 526 PG 3 WC Entomology SC Entomology GA JV339 UT WOS:A1992JV33900011 ER PT J AU MULKEY, SS SMITH, AP WRIGHT, SJ MACHADO, JL DUDLEY, R AF MULKEY, SS SMITH, AP WRIGHT, SJ MACHADO, JL DUDLEY, R TI CONTRASTING LEAF PHENOTYPES CONTROL SEASONAL-VARIATION IN WATER-LOSS IN A TROPICAL FOREST SHRUB SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE PSYCHOTRIA-MARGINATA; PHENOTYPIC PLASTICITY; MOIST TROPICAL FOREST; WATER-USE EFFICIENCY ID ACCLIMATION; PLASTICITY; DROUGHT; PANAMA AB Psychotria marginata, a shrub common to humid tropical forests in Central America, produces leaves in two seasonal flushes with contrasting morphology and physiology. Leaf production is bimodal with a major peak at the beginning of the annual wet season and a secondary peak at the end of the wet season. Together these peaks account for 75-87% of annual leaf production. Leaves produced just prior to the dry season have higher specific mass and, during drought, have lower stomatal conductances and higher water-use efficiencies. Plants irrigated during two consecutive dry seasons continued to produce leaves with these morphological and physiological differences, indicating that this feature has been strongly canalized by some factor other than water availability in this highly predictable yet seasonal habitat. The bimodal leaf production results in acclimation to changing conditions through co-occurring leaves that lack the physiological plasticity usually associated with acclimation. Heterophylly of this form suggests that the moderate drought of the dry season has been a significant selective factor for understory plants. C1 UNIV TEXAS,DEPT ZOOL,AUSTIN,TX 78712. UNIV VERMONT,DEPT BOT,BURLINGTON,VT 05405. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP MULKEY, SS (reprint author), UNIV MISSOURI,DEPT BIOL,8001 NAT BRIDGE RD,ST LOUIS,MO 63121, USA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 27 TC 27 Z9 27 U1 1 U2 3 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD OCT 1 PY 1992 VL 89 IS 19 BP 9084 EP 9088 DI 10.1073/pnas.89.19.9084 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JQ934 UT WOS:A1992JQ93400047 PM 11607329 ER PT J AU SOKER, N HARPAZ, A AF SOKER, N HARPAZ, A TI CAN A SINGLE AGB STAR FORM AN AXIALLY SYMMETRICAL PLANETARY-NEBULA SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article ID MASS-LOSS; EVOLUTION; PULSATION; GIANT; MIRA AB We apply a method, which is traditionally used for the solar magnetic field, to estimate the magnetic activity of AGB stars. We find that any magnetic-field model which tries to explain axisymmetrical mass loss from single AGB stars encounters severe difficulties. This order-of-magnitude calculation suggests that magnetic activity in AGB stars could be significant only if the envelope is spun up by a binary companion. But then other effects due to the companion are likely to be more dominant than the magnetic activity. We then conduct a preliminary study of a possible mechanism by which a single star might lose mass axisymmetrically. The results suggest that as the envelope mass of an AGB star decreases to less than or similar to 0.1M. the nature of the fundamental mode excitation could change. It is possible that, due to the same mechanism, higher-order radial modes and nonradial p modes could become significant to the mass-loss process when the envelope mass becomes very low. We argue, however, that even this mechanism, if it works, requires a binary companion to spin up the AGB envelope. C1 MIT,DEPT PHYS,CAMBRIDGE,MA 02139. MIT,DEPT SPACE RES,CAMBRIDGE,MA 02139. RP SOKER, N (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 46 TC 60 Z9 60 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD OCT PY 1992 VL 104 IS 680 BP 923 EP 930 DI 10.1086/133076 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JV534 UT WOS:A1992JV53400007 ER PT J AU RODRIGUEZ, LF HARTMANN, LW AF RODRIGUEZ, LF HARTMANN, LW TI ON THE NATURE OF THE CENTIMETER CONTINUUM EMISSION FROM THE FU-ORIONIS STARS V1057-CYG AND ELIAS 1-12 SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE STARS-ACCRETION; STARS-CIRCUMSTELLAR SHELLS; STARS-PREMAIN SEQUENCE; STARS-WINDS ID CIRCUMSTELLAR DISKS; OBJECTS; WINDS AB Using the Very Large Array we observed at 2 and 1.3-cm the FU Orionis stars V1057 Cyg and Elias 1-12. Both stars were detected as unresolved sources at 2-cm and upper limits for their flux densities were set at 1.3-cm. Our new results, combined with the published 3.6-cm flux densities, permit us to establish that the emission from these stars in the centimeter wavelengths has a spectral index of approximately 0.7, characteristic of free-free emission from ionized outflows. The estimated ionized mass loss rates for both V1057 Cyg and Elias 1-12 are approximately 10(-7) M. yr-1, much lower than the maximum mass loss rates observed from FU Orionis objects. In the case of V1057 Cyg, optical constraints suggest that the wind may be only about 1O% ionized. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP RODRIGUEZ, LF (reprint author), NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 11 TC 14 Z9 14 U1 0 U2 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 ASTR JI Rev. Mex. Astron. Astrofis. PD OCT PY 1992 VL 24 IS 2 BP 135 EP 138 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JX005 UT WOS:A1992JX00500004 ER PT J AU GOMEZ, Y RODRIGUEZ, LF MORAN, JM ABAD, C MORENOCORRAL, MA AF GOMEZ, Y RODRIGUEZ, LF MORAN, JM ABAD, C MORENOCORRAL, MA TI UPPER LIMITS FOR THE MASS-LOSS RATES FROM CENTRAL STARS OF PLANETARY-NEBULAE SO REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA LA English DT Article DE NEBULAE-PLANETARY; STARS-MASS LOSS ID RADIATION-DRIVEN WINDS; HOT STARS; NGC-2392; NGC-6543 AB The central stars of planetary nebulae are known to possess ionized stellar winds with mass loss rates of about 10(-8) M. yr-1 and velocities of approximately 2000 km s-1. This wind is expected to be fully ionized and it should be a source of free-free radiation. In most cases, the radio flux expected is below detectability for a reasonable integration time even in the best radio telescopes. We selected four favorable candidates: NGC 2392, NGC 40, NGC 6543, and NGC 6302 for a radio continuum search. These planetary nebulae were observed using the VLA. We were not successful in detecting radio continuum froin the stellar winds of their central stars, but we obtain upper limits for the mass loss rates of 3 x 10(-7), 2 x 10(-6), 1 x 10(-6), and 2 x 10(-5) M. yr-1, respectively. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. CTR INVEST ASTRON,MERIDA 5101A,VENEZUELA. RP GOMEZ, Y (reprint author), NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 19 TC 3 Z9 3 U1 0 U2 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 ASTR JI Rev. Mex. Astron. Astrofis. PD OCT PY 1992 VL 24 IS 2 BP 143 EP 146 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JX005 UT WOS:A1992JX00500006 ER PT J AU ROBINSON, H AF ROBINSON, H TI THE ASTERACEAE OF THE GUIANAS .3. VERNONIEAE AND RESTORATION OF THE GENUS XIPHOCHAETA SO RHODORA LA English DT Article DE ASTERACEAE; VERNONIEAE; POLLEN; XIPHOCHAETA; GUIANAS; SOUTH-AMERICA AB The tribe Vernonieae is surveyed in continuation of the preliminary reviews of the Asteraceae of the Guianas (Guyana, Suriname, Cayenne), South America. Nineteen species are listed in 15 genera. The genus Xiphochaeta is resurrected from the synonymy of Stilpnopappus for the northern South American species commonly known as S. viridis. Elongate raphids in the achene are emphasized as a character relating Xiphochaeta to Lepidaploa. RP ROBINSON, H (reprint author), SMITHSONIAN INST,DEPT BOT,NHB 166,WASHINGTON,DC 20560, USA. NR 0 TC 9 Z9 11 U1 0 U2 0 PU NEW ENGLAND BOTANICAL CLUB INC PI LAWRENCE PA P.O. BOX 368, LAWRENCE, KS 66044 SN 0035-4902 J9 RHODORA JI Rhodora PD OCT PY 1992 VL 94 IS 880 BP 348 EP 361 PG 14 WC Plant Sciences SC Plant Sciences GA KD753 UT WOS:A1992KD75300003 ER PT J AU DAVIS, RL HODGES, HM SMOOT, GF STEINHARDT, PJ TURNER, MS AF DAVIS, RL HODGES, HM SMOOT, GF STEINHARDT, PJ TURNER, MS TI COSMIC MICROWAVE BACKGROUND PROBES MODELS OF INFLATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXTENDED INFLATION; UNIVERSE SCENARIO; PERTURBATIONS; RADIATION; FLUCTUATIONS; ANISOTROPY; PRESCRIPTION; CONSTRAINTS; COSMOLOGIES AB Inflation creates both scalar (density) and tensor (gravity wave) metric perturbations. We find that the tensor-mode contribution to the cosmic microwave background anisotropy on large-angular scales can only exceed that of the scalar mode in models where the spectrum of perturbations deviates significantly from scale invariance (e.g., extended and power-law inflation models and extreme versions of chaotic inflation). If the tensor mode dominates at large-angular scales, then the value of DELTAT/T predicted on 1-degrees is less than if the scalar mode dominates, and, for cold-dark-matter models, bias factors b > 1 can be made consistent with Cosmic Background Explorer (COBE) DMR results. C1 LAWRENCE BERKELEY LAB,SPACE SCI LAB,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. UNIV CHICAGO,ENRICO FERMI INST,DEPT PHYS,CHICAGO,IL 60637. FERMI NATL ACCELERATOR LAB,FERMILAB ASTROPHYS CTR,NASA,BATAVIA,IL 60510. RP DAVIS, RL (reprint author), UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104, USA. NR 24 TC 184 Z9 184 U1 0 U2 2 PU AMERICAN 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 SEP 28 PY 1992 VL 69 IS 13 BP 1856 EP 1859 DI 10.1103/PhysRevLett.69.1856 PG 4 WC Physics, Multidisciplinary SC Physics GA JP859 UT WOS:A1992JP85900007 ER PT J AU REASENBERG, RD GOLDBERG, ZM AF REASENBERG, RD GOLDBERG, ZM TI HIGH-RESOLUTION GRAVITY MODEL OF VENUS SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID BETA REGIO; FIELD; TOPOGRAPHY; UNIQUENESS; INVERSION AB The anomalous gravity field of Venus shows high correlation with surface features revealed by radar. We extract gravity models from the Doppler tracking data from the Pioneer Venus Orbiter (PVO) by means of a two-step process. In the first step, we solve the nonlinear spacecraft state estimation problem using a Kalman filter-smoother. The Kalman filter has been evaluated through simulations. This evaluation and some unusual features of the filter are discussed. In the second step, we perform a geophysical inversion using a linear Bayesian estimator. To allow an unbiased comparison between gravity and topography, we use a simulation technique to smooth and distort the radar topographic data so as to yield maps having the same characteristics as our gravity maps. The maps presented cover 2/3 of the surface of Venus and display the strong topography-gravity correlation previously reported. The topography-gravity scatter plots show two distinct trends. RP REASENBERG, RD (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,SMITHSONIAN ASTROPHYS OBSERV,DIV RADIO & GEOASTRON,CAMBRIDGE,MA 02138, USA. NR 37 TC 4 Z9 6 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD SEP 25 PY 1992 VL 97 IS E9 BP 14681 EP 14690 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG491 UT WOS:A1992KG49100001 ER PT J AU FRUCHTER, AS BOOKBINDER, J GARCIA, MR BAILYN, CD AF FRUCHTER, AS BOOKBINDER, J GARCIA, MR BAILYN, CD TI X-RAYS FROM THE ECLIPSING PULSAR 1957+20 SO NATURE LA English DT Article ID MILLISECOND PULSAR; BINARY PULSAR; PSR1957+20; EVOLUTION; COMPANION; PSR-1957+20; TERZAN-5 AB Two examples of eclipsing pulsars, PSRs 1957 + 20 and 1744 - 25, have been discovered and studied1-7. In these systems, radiation from a pulsar drives a particle wind from a low-mass degenerate companion, creating an outflow which eclipses the radio pulsar once each orbital period. Ultimately the secondaries in both of these systems may be eroded away entirely, but the process by which the radiative wind ablates the smaller star remains controversial. Here we report the detection of soft X-rays, of approximately 1 keV energy, from PSR1957 + 20. This high-energy radiation, also observed by Kulkarni et al.8, should be a valuable diagnostic of the wind in this recycled pulsar system. Possible sources of the X-ray emission are the interstellar nebula driven by the pulsar wind, the interaction between the pulsar and its evaporating companion, and the pulsar itself. The small apparent size of the X-ray object argues against the first of these possibilities, and suggests that the X-rays are produced within the binary. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. YALE UNIV,DEPT ASTRON,NEW HAVEN,CT 06511. RP FRUCHTER, AS (reprint author), UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94709, USA. NR 27 TC 25 Z9 25 U1 0 U2 0 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 1992 VL 359 IS 6393 BP 303 EP 304 DI 10.1038/359303a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JP503 UT WOS:A1992JP50300048 ER PT J AU WELTY, AD STROM, SE EDWARDS, S KENYON, SJ HARTMANN, LW AF WELTY, AD STROM, SE EDWARDS, S KENYON, SJ HARTMANN, LW TI OPTICAL SPECTROSCOPY OF Z-CANIS MAJORIS, V1057-CYGNI, AND FU ORIONIS - ACCRETION DISKS AND SIGNATURES OF DISK WINDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; STARS, INDIVIDUAL (Z-CANIS MAJORIS, V1057-CYGNI, FU ORIONIS) ID V1057 CYGNI; OBJECTS; SPECTRUM AB We obtained high-resolution, high signal-to-noise ratio, 3985-4920 angstrom, 4940-6830 angstrom, and 8030-9510 angstrom spectra of V1057 Cyg, Z CMa, and FU Ori at the Mayall telescope at KPNO to examine predictions of the accretion disk model of Kenyon, Hartmann, & Hewett. Synthetic disk spectra are calculated assuming the temperature gradient, T(R), of a classical accretion disk, and assuming that disk photospheres can be modeled by adding contributions from concentric disk annuli represented by spectra of supergiant stars having T(eff) almost-equal-to T(R). We examine variation of absorption line width with wavelength for synthetic and FUor spectra, and find good correlations for the model and two FUors (V1057 Cyg and Z CMa). We also investigate variation of line width with lower excitation potential and find a subtle effect, less useful as,a disk diagnostic. We subtract synthetic spectra from object spectra to investigate overall goodness of fit. Given the simplicity of the model, we find remarkably good fits for all three objects for wavelengths longer than approximately 5000 angstrom. The mismatch at all wavelengths is due to nondisk components to the FUor spectra. We examine these residual features in V1057 Cyg and Z CMa. Most of the strongest features are either emission or P Cygni lines, suggesting origin in powerful winds driven by these objects. For FU Ori, most residuals are absorption features, as expected if FU Ori has lower surface gravity than do supergiants, or if wind absorption is particularly strong. C1 SMITH COLL,FIVE COLL ASTRON DEPT,NORTHAMPTON,MA 01063. UNIV MASSACHUSETTS,FIVE COLL ASTRON DEPT,AMHERST,MA 01003. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OI Kenyon, Scott/0000-0003-0214-609X NR 27 TC 40 Z9 40 U1 0 U2 0 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 20 PY 1992 VL 397 IS 1 BP 260 EP 276 DI 10.1086/171785 PN 1 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JM989 UT WOS:A1992JM98900028 ER PT J AU JEFFERY, DJ LEIBUNDGUT, B KIRSHNER, RP BENETTI, S BRANCH, D SONNEBORN, G AF JEFFERY, DJ LEIBUNDGUT, B KIRSHNER, RP BENETTI, S BRANCH, D SONNEBORN, G TI ANALYSIS OF THE PHOTOSPHERIC EPOCH SPECTRA OF TYPE-IA SUPERNOVAE SN-1990N AND SN-1991T SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, ABUNDANCES; SUPERNOVAE, INDIVIDUAL (SN-1990N, SN-1991T); TECHNIQUES, SPECTROSCOPIC ID WHITE-DWARF MODELS; SOBOLEV-P METHOD; ABSOLUTE-MAGNITUDE; EXPANDING ATMOSPHERES; LINE-PROFILES; SN-1987A; DEFLAGRATION; POLARIZATION; NOVAE; LIGHT AB An analysis of the photospheric epoch optical and UV spectra (obtained with the IUE satellite) of Type Ia supernovae SN 1990N and SN 1991T is presented. To perform the analysis, synthetic spectra calculated using an LTE radiative transfer procedure and white dwarf explosion models of Type la supernovae were fitted to the observations. For both supernovae, the observed spectra are consistent with a white dwarf explosion model that possesses a core of newly synthesized iron peak elements, a core boundary moving at approximately 9000 km s-1, and an envelope with a composition of intermediate-mass elements. In the well known white dwarf explosion model W7, the inner envelope (i.e., matter with velocities in the range approximately 9000-15,000 km s-1) consists of newly synthesized elements produced as the burning front of the explosion died out. For SN 1990N the observed spectra are consistent with a composition of the inner envelope that is like that of model W7. For SN 1991T the observed spectra suggest that the inner envelope of this supernova has silicon underabundant by a factor of order 3 and calcium underabundant by a factor of order 10 relative to model W7. The near-UV spectra (2500-3500 angstrom) for both supernovae are best fitted by assuming that there are iron peak elements in the ejecta moving at velocities greater than 15,000 km s-1 (i.e., in the outer envelope) and that these iron peak elements are dominated by newly synthesized Ni-Co. This result is inconsistent with the model W7 prediction of an outer envelope consisting of unburned matter dominated by carbon and oxygen. The absolute abundance of intermediate-mass elements in the outer ejecta is quite uncertain for both supernovae, but spectrum fitting shows that abundances higher than solar are probable and suggests that silicon, sulfur, and calcium are underabundant in SN 1991T relative to SN 1990N by factors of order 3, 3, and 10, respectively. In the case of SN 1990N, there are ejecta moving at a velocity of approximately 40,000 km s-1 and newly synthesized material moving perhaps as fast as 25,000 km s-1. SN 1991T has matter moving at least as fast as approximately 20,000 km s-1. Model W7 has no ejecta moving faster than 22,027 km s-1. Some variation on model W7 or the delayed/late detonation models for Type Ia supernovae may be able to explain the high velocities required for SN 1990N and the newly synthesized elements that are probably present in the outer ejecta of both supernovae. The synthetic spectra calculated for the analysis and the expanding photosphere method are used for absolute B maximum and distance determinations for SN 1990N and SN 1991T. C1 UNIV OKLAHOMA, DEPT PHYS & ASTRON, NORMAN, OK 73019 USA. NASA, GODDARD SPACE FLIGHT CTR, ASTRON & SOLAR PHYS LAB, GREENBELT, MD 20771 USA. RP JEFFERY, DJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, MS-19, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. OI Benetti, Stefano/0000-0002-3256-0016 NR 111 TC 111 Z9 111 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 20 PY 1992 VL 397 IS 1 BP 304 EP 328 DI 10.1086/171787 PN 1 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JM989 UT WOS:A1992JM98900030 ER PT J AU RADFORD, HE WEI, W SEARS, TJ AF RADFORD, HE WEI, W SEARS, TJ TI THE ROTATIONAL SPECTRUM OF TRANS-HOCO AND DOCO SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID HYPERFINE COUPLING-CONSTANTS; VIBRONIC STRUCTURE; C2H SPECTRUM AB Part of the rotational spectrum of the hydroxyformyl radical, HOCO, and its deuterated analog has been detected at frequencies between 230 and 300 GHz. The radical was formed in a flow system by the reaction between chlorine atoms and formic acid. Analysis of the spectra yields reliable estimates of the rotational, centrifugal distortion and spin-rotational parameters describing the ground state of this species. The rotational constants derived for HOCO and DOCO are consistent with a planar equilibrium structure and are used to confirm that the carrier of the spectrum is the trans-geometrical isomer. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP RADFORD, HE (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. RI Sears, Trevor/B-5990-2013 OI Sears, Trevor/0000-0002-5559-0154 NR 15 TC 54 Z9 54 U1 2 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 15 PY 1992 VL 97 IS 6 BP 3989 EP 3995 DI 10.1063/1.462938 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA JN146 UT WOS:A1992JN14600013 ER PT J AU MYERS, PC FULLER, GA AF MYERS, PC FULLER, GA TI DENSITY STRUCTURE AND STAR FORMATION IN DENSE CORES WITH THERMAL AND NONTHERMAL MOTIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM CLOUDS; ISM MOLECULES; STARS FORMATION ID MOLECULAR CLOUD CORES; LOW-MASS STARS; DARK CLOUDS; CO OBSERVATIONS; ORION; MULTITRANSITION; TURBULENCE; BIRTHLINE; BINARIES; AMMONIA AB We present an equilibrium model of a spherically symmetric dense core which incorporates both thermal and nonthermal motions. The thermal motions are spatially uniform, and the nonthermal motions increase with radius r as a power law, as indicated by observations. This "TNT" model has a characteristic radius r(TNT), generally 0.01-0.1 pc, where thermal and nonthermal velocity dispersions are equal. For r much less than r(TNT), the TNT core is essentially thermal, and reduces to the singular isothermal sphere (SIS). For r greater-than-or-equal-to r(TNT), TNT density and pressure are larger and have shallower gradients than do SIS values and match observations more closely than do SIS values. The "inside-out" collapse of a core forms a star faster in the TNT model than in the SIS model with the same kinetic temperature, because in the TNT model the "expansion wave" travels faster, and triggers collapse from denser gas, than in the SIS model. In a core forming a 10 M. star the mean accretion rate is 1 x 10(-5) M., yr-1, faster than the thermal rate by a factor 2, and faster than the thermal rate in a low-mass core by a factor 5. The TNT model also predicts the time for a typical core associated with a star of mass 0.2 to 30 M., to make a star of that mass. The star formation time is similar for all masses considered, ranging from 1 x 10(5) yr for 0.2 M. to a maximum between 6 and 10 x 10(5) yr for 30 M.. For stars with less than 1 M., the mean accretion rate is nearly constant, reflecting the thermal dominance of the velocity dispersion. For stars with 3 to 30 M., the accretion time is nearly constant, reflecting the nonthermal dominance of the velocity dispersion, and the increase in velocity dispersion with core size. The star-forming collapse is probably terminated by stellar winds and outflows, which may stabilize the gas with subsonic infall speed in a few times 10(5) yr. The magnetic field whose energy density is equal to that of the nonthermal motions varies approximately as r-1/2 for r < r(TNT), but more nearly as r-1/4 for r > r(TNT). RP MYERS, PC (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS, MAIL STOP 42, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 64 TC 121 Z9 121 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 10 PY 1992 VL 396 IS 2 BP 631 EP 642 DI 10.1086/171744 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JL152 UT WOS:A1992JL15200019 ER PT J AU REMILLARD, RA ROSENTHAL, E TUOHY, IR SCHWARTZ, DA BUCKLEY, DAH BRISSENDEN, RJV AF REMILLARD, RA ROSENTHAL, E TUOHY, IR SCHWARTZ, DA BUCKLEY, DAH BRISSENDEN, RJV TI S-154 IN THE LARGE MAGELLANIC CLOUD - SPECTRAL EVOLUTION FROM A LUMINOUS FE-II VARIABLE TO A SYMBIOTIC-LIKE STAR SO ASTROPHYSICAL JOURNAL LA English DT Article DE MAGELLANIC CLOUDS; STARS INDIVIDUAL (S-154); STARS VARIABLES OTHERS ID RX PUPPIS; PHASE AB The emission-line star, S-154, is a luminous variable in the Large Magellanic Cloud. Between 1988 February and December, S- 1 54 changed its spectral appearance from a low-excitation "Fe II star" into a high-excitation state that resembles symbiotic stars. Before the transition (1984-1988), the spectral features had been primarily confined to emission lines of H and Fe II; afterward, we observed emission from He I, He II, O III, and the lambda-6830 band. This transition is reminiscent of spectral variations observed in RX Puppis, but the spectrum of S-154 out to 1-mu-m shows no evidence of the Mira variable contained in that symbiotic star. The simplest interpretation for the spectral evolution of S-154 is the optical thinning of the nebula. This study implies that spectral type of the central star(s) does not always dominate the physical conditions in the circumstellar material and thereby determine the nebular classification. The membership of S-154 in the LMC was confirmed with a radial velocity measurement of +274 km s-1, enabling the measurement of absolute luminosity. The historical light curve (1880-1990) obtained from 346 photographic plates of the Harvard Plate Library exhibits approximately 4 mag of variations, with a range of -6 < M(B) < -2. There is no evidence of coherent modulations that would represent the orbital period of a symbiotic binary. We originally investigated S-154 as an optical candidate of a HEAO 1 X-ray source on grounds of positional coincidence. However, efforts to confirm the X-ray emission with EXOSAT were negative, and the status of S-154 as an X-ray source remains unclear. C1 CERRO TOLOLO INTERAMER OBSERV,LA SERENA,CHILE. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. BRITISH AEROSP AUSTRALIA LTD,SALISBURY,SA 5108,AUSTRALIA. S AFRICAN ASTRON OBSERV,CAPE TOWN 7935,SOUTH AFRICA. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP REMILLARD, RA (reprint author), MIT,CTR SPACE RES,77 MASSACHUSETTS AVE,CAMBRIDGE,MA 02139, USA. NR 22 TC 3 Z9 3 U1 0 U2 0 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 10 PY 1992 VL 396 IS 2 BP 668 EP 673 DI 10.1086/171747 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JL152 UT WOS:A1992JL15200022 ER PT J AU OFLAHERTY, KS CAWLEY, MF FEGAN, DJ LAMB, RC LANG, MJ LEWIS, DA PUNCH, M REYNOLDS, PT VACANTI, G WEEKES, TC AF OFLAHERTY, KS CAWLEY, MF FEGAN, DJ LAMB, RC LANG, MJ LEWIS, DA PUNCH, M REYNOLDS, PT VACANTI, G WEEKES, TC TI A SEARCH FOR TEV EMISSION FROM CYGNUS-X-3 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GAMMA-RAYS OBSERVATIONS; STARS INDIVIDUAL (CYG-X-3) ID GAMMA-RAY OBSERVATIONS; 12.59 MS PULSAR; NEUTRAL PARTICLES; ENERGY; ASTRONOMY AB Cygnus X-3 has been observed during 1988-1990 by the Whipple Observatory collaboration using the 109 pixel high-resolution gamma-ray imaging telescope. The data recorded has been analyzed to search for (a) steady emission of TeV gamma-rays, (b) 4.8 hr modulation of the gamma-ray light curve, and (c) periodic emission at 12.59 ms. No evidence is found for emission based on these searches. The upper limit (3-sigma) for long-term steady emission is 3.5 x 10(-12) photons cm-2 s-1, a factor of 10 below fluxes reported a decade ago for this energy. C1 ST PATRICKS COLL,DEPT PHYS,MAYNOOTH,KILDARE,IRELAND. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP OFLAHERTY, KS (reprint author), NATL UNIV IRELAND UNIV COLL DUBLIN,DEPT PHYS,DUBLIN 4,IRELAND. OI Punch, Michael/0000-0002-4710-2165; Lang, Mark/0000-0003-4641-4201 NR 45 TC 24 Z9 24 U1 0 U2 0 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 10 PY 1992 VL 396 IS 2 BP 674 EP 678 DI 10.1086/171748 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JL152 UT WOS:A1992JL15200023 ER PT J AU LIU, WH DALGARNO, A LEPP, S AF LIU, WH DALGARNO, A LEPP, S TI CARBON-MONOXIDE IN SN-1987A SO ASTROPHYSICAL JOURNAL LA English DT Article DE MOLECULAR PROCESSES; STARS INDIVIDUAL (SN-1987A); SUPERNOVAE INDIVIDUAL (SN-1987A) ID GAMMA-RAY LINE; ELECTRON-SCATTERING; SUPERNOVA 1987A; CO; INSTABILITIES; DISCOVERY; EMISSION; EJECTA AB It is pointed out that the infrared emission of carbon monoxide in SN 1987A is optically thick at early times and that the level populations fall out of thermal equilibrium at later times. A reinterpretation of the data yields masses of CO of order 10(-3) M.. A chemical scheme is advanced with which these high masses can be reproduced provided that the ejecta contain clumps of microscopically unmixed gas, occupying at least 10% of the volume. RP LIU, WH (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 38 TC 52 Z9 52 U1 0 U2 4 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 10 PY 1992 VL 396 IS 2 BP 679 EP 685 DI 10.1086/171749 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JL152 UT WOS:A1992JL15200024 ER PT J AU TORRELLES, JM RODRIGUEZ, LF CANTO, J ANGLADA, G GOMEZ, JF CURIEL, S HO, PTP AF TORRELLES, JM RODRIGUEZ, LF CANTO, J ANGLADA, G GOMEZ, JF CURIEL, S HO, PTP TI ON THE NATURE OF THE EXCITATION OF HERBIG-HARO OBJECT-2 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (HH 1-2); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; STARS, PRE-MAIN-SEQUENCE ID VLA OBSERVATIONS; HIGH-RESOLUTION; HH-1; AMMONIA; CONTINUUM; EMISSION; SYSTEM AB We present VLA observations of the NH3(1, 1) and NH3(2, 2) lines toward the HH 2 object using the D configuration. We detected several small (approximately 20") clumps located near HH 2. These clumps are cold, T(R)(2, 2; 1, 1) less-than-or-equal-to 20 K, and with narrow line widths, DELTA-V less-than-or-equal-to 1 km s-1. We find that these clumps appear a few arcseconds downwind with respect to the HH 2 optical knots and the H-2 [S(1), nu = 1 --> 0] line emission. The low temperatures and narrow line widths found in the ammonia clumps imply that they cannot be ambient clumps compressed as a whole by a shock wave. We suggest that these clumps are random ambient high-density clumps in the way of the collimated wind from VLA 1. Alternatively, they could be random ambient clumps with the observed ammonia emission enhanced by the radiation field generated at the bow shock of the jet, as proposed to explain the HCO+ emission near HH 1 and HH 2. However, detailed theoretical calculations will be needed to investigate this possibility. We favor an interstellar jet origin for HH 2. We suggest that the observed optical knots in HH 2 could be part of the bow shock of the VLA 1 jet, but now being disrupted and fragmented by the interaction with ambient clumps such as those observed in ammonia. C1 UNIV BARCELONA,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,MEXICO CITY 04510,DF,MEXICO. RP TORRELLES, JM (reprint author), CSIC,INST ASTROFIS ANDALUCIA,APARTADO CORREOS 3004,C SANCHO PANZA S-N,E-18080 GRANADA,SPAIN. RI Gomez, Jose Francisco/D-8392-2016; OI Gomez, Jose Francisco/0000-0002-7065-542X; Torrelles, Jose Maria/0000-0002-6896-6085 NR 25 TC 37 Z9 37 U1 0 U2 0 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 10 PY 1992 VL 396 IS 2 BP L95 EP L97 DI 10.1086/186525 PN 2 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JL153 UT WOS:A1992JL15300010 ER PT J AU HARD, RJ MERRILL, WL AF HARD, RJ MERRILL, WL TI MOBILE AGRICULTURALISTS AND THE EMERGENCE OF SEDENTISM - PERSPECTIVES FROM NORTHERN MEXICO SO AMERICAN ANTHROPOLOGIST LA English DT Article ID SETTLEMENT AB A truism in anthropology is that hunters and gatherers are mobile and agriculturalists are sedentary. Factors affecting residential mobility are examined using data from a Raramuri (Tarahumara) community of residentially mobile agriculturalists in northern Mexico who move among principal residences, growing-season residences associated with distant fields, winter locations, and a ceremonial center. This case indicates that the unilineal model from mobile hunting and gathering to sedentary agriculture must be broadened and that economic factors alone do not totally determine settlement patterns. Explanatory models related to the causes of sedentism are considered. C1 SMITHSONIAN INST,DEPT ANTHROPOL,WASHINGTON,DC 20560. RP HARD, RJ (reprint author), UNIV TEXAS,DIV BEHAV & CULTURAL SCI,SAN ANTONIO,TX 78285, USA. NR 64 TC 28 Z9 28 U1 1 U2 5 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0002-7294 J9 AM ANTHROPOL JI Am. Anthropol. PD SEP PY 1992 VL 94 IS 3 BP 601 EP 620 DI 10.1525/aa.1992.94.3.02a00040 PG 20 WC Anthropology SC Anthropology GA JP652 UT WOS:A1992JP65200003 ER PT J AU BEDINI, SA AF BEDINI, SA TI LE-CITOYEN-LENOIR - SCIENTIFIC INSTRUMENT MAKING IN REVOLUTIONARY FRANCE - BENNETT,JA SO ANNALS OF SCIENCE LA English DT Book Review RP BEDINI, SA (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0003-3790 J9 ANN SCI JI Ann. Sci. PD SEP PY 1992 VL 49 IS 5 BP 500 EP 501 PG 2 WC History & Philosophy Of Science SC History & Philosophy of Science GA JH675 UT WOS:A1992JH67500014 ER PT J AU LECAR, M FRANKLIN, F MURISON, M AF LECAR, M FRANKLIN, F MURISON, M TI ON PREDICTING LONG-TERM ORBITAL INSTABILITY - A RELATION BETWEEN THE LYAPUNOV TIME AND SUDDEN ORBITAL TRANSITIONS SO ASTRONOMICAL JOURNAL LA English DT Article ID ORIGINAL DISTRIBUTION; CHAOTIC BEHAVIOR; ASTEROIDS; JUPITER; SATURN AB In three examples representative of Solar System dynamics, we find that the Lyapunov time, T(L) (i.e., the inverse of the Lyapunov exponent) and the time for an orbit to make a sudden transition T(C) are strongly correlated. The relation between the two times is T(C) is-proportional-to T(L)b, with b congruent-to 1.8. The first example examines asteroid orbits interior to Jupiter; the sudden transition occurs when the asteroid makes a close approach to Jupiter, which occurs close to the time when the asteroid's orbit crosses Jupiter's orbit. The second example examines orbits of hypothetical asteroids between Jupiter and Saturn; the sudden transition occurs when the asteroid's orbit crosses the orbit of either of the planets. The third, considerably different, example examines massless bodies that initially orbit the smaller of the two masses of a binary system. In this case, the escape of the satellite signals the sudden transition. We have numerically integrated about 150 orbits in the first and second examples, and about 1000 orbits in the third example. In the first two examples, all three bodies were coplanar. In the third example, the initial inclination of the test particle was varied from 0-degrees to 60-degrees. There was, at most, a weak dependence on inclination. The tight clustering of the exponent b was remarkable, considering the widely different dynamical systems. The maximum departure of b from 1.8 was 14%, and the average departure was less than 7%. The correlation between T(C) and T(L) holds over at least six orders of magnitude in T(C); the longest integrations for asteroids interior to Jupiter extended for 10(8) yr. The Lyapunov time typically reaches its asymptotic value in a few thousand orbits, and then it can be used to predict sudden events (T(C)) that occur at much later times, e.g., the lifetime of the solar system. RP LECAR, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 13 TC 57 Z9 57 U1 0 U2 0 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 SEP PY 1992 VL 104 IS 3 BP 1230 EP 1236 DI 10.1086/116312 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JL466 UT WOS:A1992JL46600027 ER PT J AU HASAN, SS CHRISTENSENDALSGAARD, J AF HASAN, SS CHRISTENSENDALSGAARD, J TI THE INFLUENCE OF A VERTICAL MAGNETIC-FIELD ON OSCILLATIONS IN AN ISOTHERMAL STRATIFIED ATMOSPHERE SO ASTROPHYSICAL JOURNAL LA English DT Article ID ACOUSTIC-GRAVITY WAVES; SUNSPOT UMBRAL OSCILLATIONS; SOLAR P-MODES; STELLAR OSCILLATIONS; BACKGROUND POLYTROPES; PROPAGATION; TRANSFORMATION; CHROMOSPHERE; STABILITY; SUN AB We examine the effect of a uniform vertical magnetic field on the modes of an isothermal stratified atmosphere. The general solutions of the wave equation for an isothermal magnetized medium are first given. We present asymptotic expansions of these solutions in the strong- and weak-field limits. In the latter case, an analytical expression for the dispersion relation is derived, which allows the effect of a weak magnetic field on the modes to be studied. For a weak field we find that, to lowest order in our perturbation expansion, the oscillation spectrum can be analysed in terms of (a) p- and g-like modes; (b) magnetic Lamb modes; and (c) magnetic or slow modes. Our approximation is valid as long as the frequencies of the individual modes are well separated and not too low. The frequency corrections for each of the modes due to coupling with the remaining modes are calculated. It is explicitly demonstrated that when the frequencies of different modes are almost identical, strong mode coupling occurs and the waves acquire a mixed character. At such frequencies, the asymptotic behavior cannot be treated in terms of elementary modes, but has to be modified to include the effects of degeneracy. An analysis of the solutions in the vicinity of the degenerate frequencies is carried out. Detailed results are presented in the form of diagnostic diagrams, showing the variation of frequency with horizontal wave number. The solutions clearly reveal the presence of avoided crossings, which occur at the otherwise degenerate frequencies. Examples of different types of avoided crossings are given. We also present results for the moderate to strong field case and identify the solutions of various orders. A comparison is made with previous studies. C1 INDIAN INST ASTROPHYS,BANGALORE 560034,INDIA. AARHUS UNIV HOSP,INST FYS & ASTRON,DK-8000 AARHUS,DENMARK. RP HASAN, SS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Hasan, Siraj/C-2927-2012 NR 70 TC 25 Z9 25 U1 0 U2 0 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 1992 VL 396 IS 1 BP 311 EP 332 DI 10.1086/171718 PN 1 PG 22 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JJ358 UT WOS:A1992JJ35800028 ER PT J AU KUNC, JA SOON, WH AF KUNC, JA SOON, WH TI MAXIMUM PRINCIPAL QUANTUM NUMBERS OF THE ATOMIC-HYDROGEN IN THE SOLAR CHROMOSPHERE AND PHOTOSPHERE SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC PROCESSES; SUN, CHROMOSPHERE ID LARKIN PARTITION-FUNCTION; PLASMAS AB The maximum principal quantum numbers n(m) and the lowering of the continuum energy of hydrogen atoms in the solar chromosphere and photosphere are calculated. Several theories are discussed and the work focuses on two major mechanisms of the lowering of the continuum (the reduction of the ionization energy and the line merging). It was found that under the physical conditions existing in the solar chromosphere and photosphere the maximum principal quantum number varies, depending on the plasma temperature and density, from n(m) = 11 to n(m) = 62. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP KUNC, JA (reprint author), HARVARD UNIV,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138, USA. NR 28 TC 2 Z9 2 U1 1 U2 4 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 1992 VL 396 IS 1 BP 364 EP 368 DI 10.1086/171722 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JJ358 UT WOS:A1992JJ35800032 ER PT J AU DEMING, D JENNINGS, DE MCCABE, G NOYES, R WIEDEMANN, G ESPENAK, F AF DEMING, D JENNINGS, DE MCCABE, G NOYES, R WIEDEMANN, G ESPENAK, F TI LIMB OBSERVATIONS OF THE 12.32 MICRON SOLAR EMISSION-LINE DURING THE 1991 JULY TOTAL ECLIPSE SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, GENERAL; SUN, ATMOSPHERE; SUN, GENERAL ID 12 MICRONS; QUIET SUN; MG-I; FIELD AB We determined the limb profile of the Mg I 12.32-mu-m emission line by occultation in the 1991 July 11 total solar eclipse over Mauna Kea. The observations used the NASA 3 m Infrared Telescope Facility and a new Goddard large cryogenic grating spectrometer. The results show that the emission peaks very close to the 12-mu-m continuum limb, as predicted by recent theory for this line as a non-LTE photospheric emission feature. However, the increase in optical depth for this extreme limb-viewing situation means that most of the observed emission arises from above the chromospheric temperature minimum, and we find that this emission is extended to heights well in excess of the model predictions. The line emission can be observed as high as 2000 km above the 12-mu-m continuum limb, whereas theory predicts it to remain observable no higher than approximately 500 km above the continuum limb. The substantial limb extension observed in this line is qualitatively consistent with limb extensions seen by other observers in the far-IR continuum, and we conclude that it is indicative of departures from gravitational hydrostatic equilibrium, or spatial inhomogeneities, in the upper solar atmosphere. C1 HUGHES STX CORP, LANHAM, MD USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. EUROPEAN SO OBSERV, W-8046 GARCHING, GERMANY. RP UNIV HAWAII, INST ASTRON, INFRARED TELESCOPE FACIL, HONOLULU, HI 96822 USA. RI Jennings, Donald/D-7978-2012 NR 12 TC 12 Z9 12 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 1992 VL 396 IS 1 BP L53 EP L56 DI 10.1086/186515 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JJ359 UT WOS:A1992JJ35900012 ER PT J AU BALL, MD NIZZI, CP FURR, HC OLSON, JA OFTEDAL, OT AF BALL, MD NIZZI, CP FURR, HC OLSON, JA OFTEDAL, OT TI FATTY-ACYL ESTERS OF RETINOL (VITAMIN-A) IN THE LIVER OF THE HARP SEAL (PHOCA-GROENLANDICA), HOODED SEAL (CYSTOPHORA-CRISTATA), AND CALIFORNIA SEA LION (ZALOPHUS-CALIFORNIANUS) SO BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE LA English DT Note DE FATTY-ACID COMPOSITION; PINNIPED LIVER; RETINYL ESTERS; VITAMIN-A ID PERFORMANCE LIQUID-CHROMATOGRAPHY; RAT; ACYLTRANSFERASE; SEPARATION; POPULATION; ACIDS; PUPS AB The fatty-acid composition of retinyl esters in the livers of two species of phocid seal, the harp seal (Phoca groenlandica, n = 20) and the hooded seal (Cystophora cristata, n = 15), and one species of otariid seal, the California sea lion (Zalophus californianus, n = 6), was determined. Vitamin A ranged in concentration from 4 to 1024 nmol retinol/g liver for the phocids and from 381 to 979 nmol/g liver for the otariids. In most of the livers, retinyl palmitate was not the principal ester, and the palmitate + stearate + oleate trio of retinyl esters represented less than 50% of the total. In all samples, the retinyl esters contained 20:1, 20:4, 20:5, and 22:6 in unusually large amounts. Retinyl esters tended to be richer than whole-liver lipids in 20:5 + 22:6, whereas whole-liver lipids were richer in 18:0 and 18:2. Therefore, the pool of acyl donors used for the esterification of retinol may be distinct from that used for other lipids. Birth-to-weaning changes were seen only in the harp seals. In the pups, the hepatic vitamin-A concentration increased 454%, while the proportion of 18:0 and 20:1 in the retinyl esters rose and that of 14:0 + 16:1 and 20:4 fell. Concomitantly, in their mothers, the proportion of 20:4 increased but that of 16:0 and 18:0 decreased. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT BIOCHEM & BIOPHYS,AMES,IA 50011. SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008. FU NIDDK NIH HHS [DK32793, DK39733] NR 32 TC 10 Z9 10 U1 1 U2 5 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0829-8211 J9 BIOCHEM CELL BIOL JI Biochem. Cell Biol. PD SEP PY 1992 VL 70 IS 9 BP 809 EP 813 PG 5 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA JZ050 UT WOS:A1992JZ05000012 PM 1482558 ER PT J AU FORGET, PM AF FORGET, PM TI SEED REMOVAL AND SEED FATE IN GUSTAVIA-SUPERBA (LECYTHIDACEAE) SO BIOTROPICA LA English DT Article DE AGOUTI; BARRO COLORADO ISLAND; GUSTAVIA-SUPERBA; PANAMA; SEED DISPERSAL; SEED PREDATION; SEED REMOVAL ID NEOTROPICAL TREE; PREDATION; DISPERSAL; MAMMALS; PANAMA; RECRUITMENT; SURVIVAL; RODENTS; FORESTS; FOOD AB The fate of the large (mean 12.6 g) seeds of Gustavia superba, an understory tree, was analyzed on Barro Colorado Island (BCI), Panama. Eight hundred thread-marked seeds were placed on the ground at two contrasting 1-ha forest sites (Gustavia-rich vs Gustavia-poor) during two periods (June and July) of the fruiting season of G. superba. These months correspond to maximum food availability on BCI. On average, 85.5 percent of the seeds were removed within 28 days, 47.5 percent and 3.8 percent of them being found scatterhoarded (buried) by agouti (Dasyprocta punctata) and gnawed by rodents, respectively, within 10 m of their origins. The effect of site and the interaction of site with month significantly affected seed removal rates, but not scatterhoarding rates. Proportions of seeds removed were greater where G. superba trees were rare. Because freshly fallen seeds were not infested by bruchid weevils, unburied and germinating seeds provide an abundant short-term food supply for terrestrial mammals. Burying seeds allowed agoutis to later consume cotyledons of germinating seeds from mid-August throughout October, when food is scarce on BCI. Overall seed dispersal effectiveness (% seed dispersal multiplied by % seedling survival) contrasts dramatically between forest sites, being 10. 1 percent and 0.75 percent at Gustavia-rich and Gustavia-poor areas, respectively. This result suggests that predator-disperser satiation occurred, maybe due to greater G. superba seed availability and other alternative food supply, allowing greater G. superba seedling survival at the Gustavia-rich area. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RI Forget, Pierre-Michel/B-4355-2009 OI Forget, Pierre-Michel/0000-0002-9252-974X NR 43 TC 90 Z9 102 U1 1 U2 13 PU ASSN TROP BIOL PI ST LOUIS PA MISSOURI BOTANICAL GARDEN 2345 TOWER GROVE AVE, ST LOUIS, MO 63110 SN 0006-3606 J9 BIOTROPICA JI Biotropica PD SEP PY 1992 VL 24 IS 3 BP 408 EP 414 DI 10.2307/2388611 PG 7 WC Ecology SC Environmental Sciences & Ecology GA JP928 UT WOS:A1992JP92800007 ER PT J AU MOORE, RA QI, DW SCOTT, TC AF MOORE, RA QI, DW SCOTT, TC TI CAUSALITY OF RELATIVISTIC MANY-PARTICLE CLASSICAL DYNAMICS THEORIES SO CANADIAN JOURNAL OF PHYSICS LA English DT Article ID ELECTROMAGNETIC-INTERACTIONS AB At the present time, the relativistic many-particle classical dynamics theory of the Fokker-Wheeler-Feynman type for isolated systems admits to two contradictory and mutually exclusive interpretations, noncausal versus causal. This work resolves this contradiction by demonstrating definitively that the mathematical structure of this theory is inconsistent with the assumption of noncausality. The demonstration is effected by identifying the fundamental difference in the input assumptions responsible for the two interpretations, by presenting general arguments proving the deterministic nature of the equations of motion, and by giving explicit examples that not only display the deterministic nature of the equations of motion but also their causal character, namely, being solvable by a stepwise forward in time integration using solely past information. One concludes, first, that the assumption of noncausality, and related deductions, is invalid and must be rejected and, second, that one has, at last, the relativistic generalization of many-particle nonrelativistic classical dynamics based on a Hamilton's principle and with a Lagrangian structure. Thus, one can sensibly proceed to examine the physical implications. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP MOORE, RA (reprint author), UNIV WATERLOO,GUELPH WATERLOO PROGRAM GRAD WORK PHYS,WATERLOO N2L 3G1,ONTARIO,CANADA. NR 22 TC 9 Z9 9 U1 0 U2 2 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4204 J9 CAN J PHYS JI Can. J. Phys. PD SEP PY 1992 VL 70 IS 9 BP 772 EP 781 PG 10 WC Physics, Multidisciplinary SC Physics GA KN061 UT WOS:A1992KN06100012 ER PT J AU SORENSON, MD AF SORENSON, MD TI WHY IS CONSPECIFIC NEST PARASITISM MORE FREQUENT IN WATERFOWL THAN IN OTHER BIRDS - COMMENT SO CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE LA English DT Discussion ID EGG DISCRIMINATION; BROOD PARASITISM; SNOW GEESE; SWALLOWS; RECOGNITION; HOST; DEFENSES; CUCKOO; YOUNG; SIZE AB Rohwer and Freeman (F. C. Rohwer and S. Freeman. 1989. Can. J. Zool. 67: 239 - 253) have suggested that conspecific nest parasitism is rare in species with parentally fed young because high costs to hosts result in strong selection for defenses against parasitism. In contrast, conspecific nest parasitism is frequent in waterfowl and other species with self-feeding young because the costs of parasitism to hosts are minimal and produce little selection for host defenses. I offer several criticisms of this hypothesis and suggest that variation in the rate of conspecific nest parasitism among birds is better understood by focusing on the costs and benefits of parasitism for the parasitic female. I suggest that conspecific nest parasitism is more successful and therefore more frequent in waterfowl species because parasitic eggs and young require no more parental care from the host than it is already providing to its own offspring. In contrast, parasitism is less successful and less frequent in species with parentally fed young because parasitic young require additional care that hosts may not be capable of providing. RP SORENSON, MD (reprint author), SMITHSONIAN INST,NATL ZOOL PK,CTR CONSERVAT & RES,FRONT ROYAL,VA 22630, USA. RI Sorenson, Michael/D-8065-2011 OI Sorenson, Michael/0000-0001-5375-2917 NR 34 TC 31 Z9 33 U1 1 U2 12 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4301 J9 CAN J ZOOL JI Can. J. Zool.-Rev. Can. Zool. PD SEP PY 1992 VL 70 IS 9 BP 1856 EP 1858 DI 10.1139/z92-253 PG 3 WC Zoology SC Zoology GA JT712 UT WOS:A1992JT71200025 ER PT J AU CERNY, P ERCIT, TS WISE, MA AF CERNY, P ERCIT, TS WISE, MA TI THE TANTALITE TAPIOLITE GAP - NATURAL ASSEMBLAGES VERSUS EXPERIMENTAL-DATA SO CANADIAN MINERALOGIST LA English DT Article; Proceedings Paper CT WORKSHOP ON THE MINERALOGY, GEOCHEMISTRY AND PETROLOGY OF GRANITIC PEGMATITES CY AUG, 1990 CL UNIV MANITOBA, WINNIPEG, CANADA SP INT GEOL CORRELAT PROGRAM HO UNIV MANITOBA DE TANTALITE; TAPIOLITE; COLUMBITE; MISCIBILITY GAP; METASTABILITY; GRANITIC PEGMATITES ID GEOCHEMISTRY; MINERALOGY; PEGMATITES; NIOBIUM AB Compositions of 45 ferrotapiolite-tantalite pairs from 12 granitic pegmatites were analyzed by electron microprobe to establish empirically the shape, extent and position of the two-phase field in the columbite quadrilateral. The field is perceptibly broader than that defined earlier on the basis of single-phase samples. The compositions of single phases located within the boundaries based on coexisting minerals are, under the conditions of crystallization, probably metastable. The two-phase field derived from coexisting minerals approximates an isothermal section through a pseudoquaternary solvus in the columbite quadrilateral through most of the course of its boundaries, as defined by primary Nb-enriched ferrotapiolite - tantalite pairs from blocky zones and albitic units of their parent pegmatites. Extremely fractionated mineral pairs most enriched in Mn and Ta come from late associations replacing simpsonite; they crystallized at distinctly lower temperatures. Boundaries of the two-phase field are controlled by temperature, f(O2), structural state, impurities disturbing the AB2O6 stoichiometry, and probably pressure. All these factors require thorough experimental reinvestigation. C1 CANADA MUSEUM NAT,DIV MINERAL SCI,OTTAWA K1A 0M8,ONTARIO,CANADA. SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. RP CERNY, P (reprint author), UNIV MANITOBA,DEPT GEOL SCI,WINNIPEG R3T 2N2,MANITOBA,CANADA. NR 31 TC 41 Z9 42 U1 0 U2 2 PU MINERALOGICAL ASSOC CANADA PI NEPEAN PA CITYVIEW 78087, NEPEAN ON K2G 5W2, CANADA SN 0008-4476 J9 CAN MINERAL JI Can. Mineral. PD SEP PY 1992 VL 30 BP 587 EP 596 PN 3 PG 10 WC Mineralogy SC Mineralogy GA KC528 UT WOS:A1992KC52800007 ER PT J AU KALLERSJO, M FARRIS, JS KLUGE, AG BULT, C AF KALLERSJO, M FARRIS, JS KLUGE, AG BULT, C TI SKEWNESS AND PERMUTATION SO CLADISTICS LA English DT Article ID ANGIOSPERMS; TESTS C1 AMER MUSEUM NAT HIST, DEPT ENTOMOL, NEW YORK, NY 10024 USA. UNIV MICHIGAN, DEPT REPTILES & AMPHIBIANS, MUSEUM ZOOL, ANN ARBOR, MI 48109 USA. SMITHSONIAN INST, MOLEC SYSTEMAT LAB, WASHINGTON, DC 20560 USA. RP KALLERSJO, M (reprint author), NAT HIST RIKSMUSEET, MOLEK SYST LAB, BOX 50007, S-10405 STOCKHOLM, SWEDEN. NR 20 TC 311 Z9 313 U1 0 U2 2 PU WILEY-BLACKWELL PUBLISHING, INC PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0748-3007 J9 CLADISTICS JI Cladistics PD SEP PY 1992 VL 8 IS 3 BP 275 EP 287 DI 10.1111/j.1096-0031.1992.tb00071.x PG 13 WC Evolutionary Biology SC Evolutionary Biology GA KK990 UT WOS:A1992KK99000004 ER PT J AU MARVIN, UB AF MARVIN, UB TI INTERNATIONAL-COMMISSION-ON-THE-HISTORY-OF-GEOLOGICAL-SCIENCES SYMPOSIUM - DRESDEN, GERMANY, 9-15 SEPTEMBER 1991 SO EPISODES LA English DT Editorial Material RP MARVIN, UB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT UNION GEOLOGICAL SCIENCES PI KEYWORTH PA C/O BRITISH GEOLOGICAL SURVEY, KEYWORTH, NOTTINGHAM, ENGLAND NG12 5GG SN 0705-3797 J9 EPISODES JI Episodes PD SEP PY 1992 VL 15 IS 3 BP 213 EP 214 PG 2 WC Geosciences, Multidisciplinary SC Geology GA KG909 UT WOS:A1992KG90900011 ER PT J AU SEEGER, A AF SEEGER, A TI ETHNOMUSICOLOGY AND MUSIC LAW SO ETHNOMUSICOLOGY LA English DT Article RP SEEGER, A (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 18 TC 25 Z9 25 U1 1 U2 6 PU SOC ETHNOMUSICOLOGY INC PI BLOOMINGTON PA MORRISON HALL, ROOM 005 INDIANA UNIVERSITY, BLOOMINGTON, IN 47405 SN 0014-1836 J9 ETHNOMUSICOLOGY JI Ethnomusicology PD FAL PY 1992 VL 36 IS 3 BP 345 EP 359 DI 10.2307/851868 PG 15 WC Music SC Music GA KG034 UT WOS:A1992KG03400004 ER PT J AU ZEH, DW ZEH, JA COFFROTH, MA BERMINGHAM, E AF ZEH, DW ZEH, JA COFFROTH, MA BERMINGHAM, E TI POPULATION-SPECIFIC DNA FINGERPRINTS IN A NEOTROPICAL PSEUDOSCORPION (CORDYLOCHERNES-SCORPIOIDES) SO HEREDITY LA English DT Article DE CORDYLOCHERNES-SCORPIOIDES; DNA FINGERPRINTING; MINISATELLITE DNA; POPULATION DIFFERENTIATION ID DIFFERENTIATION AB The pseudoscorpion, Cordylochernes scorpioides, is currently described as a single species, ranging throughout the rain forests of Central and South America. Populations from Panama and French Guiana appear morphologically and behaviourally indistinguishable. However, DNA fingerprinting, using the probe M13, revealed distinct, population-diagnostic clusters of low molecular weight bands (< 4 kb). This appears to be the most extreme case of population differentiation in minisatellite DNA so far detected in outbred, sexually-reproducing populations. As the two populations also exhibit allozyme divergence and are reproductively incompatible at the post-zygotic stage, we conclude that they are, in fact, cryptic species, the characteristics of which are apparent only at the molecular level. C1 UNIV NOTTINGHAM HOSP,QUEENS MED CTR,SMITHSONIAN TROP RES INST,NOTTINGHAM NG7 2UH,ENGLAND. SUNY ALBANY,DEPT BIOL SCI,ALBANY,NY 12222. RP ZEH, DW (reprint author), UNIV NOTTINGHAM HOSP,QUEENS MED CTR,DEPT GENET,NOTTINGHAM NG7 2UH,ENGLAND. NR 29 TC 26 Z9 26 U1 0 U2 1 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0018-067X J9 HEREDITY JI Heredity PD SEP PY 1992 VL 69 BP 201 EP 208 DI 10.1038/hdy.1992.117 PN 3 PG 8 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA JL993 UT WOS:A1992JL99300001 ER PT J AU SLATTERY, WL BENZ, W CAMERON, AGW AF SLATTERY, WL BENZ, W CAMERON, AGW TI GIANT IMPACTS ON A PRIMITIVE URANUS SO ICARUS LA English DT Article ID HYPOTHESIS; ORIGIN; MOON; SATELLITES; ACCRETION; EVOLUTION; PLANETS; SYSTEM; SPH C1 UNIV ARIZONA,LUNAR & PLANETARY LAB,TUCSON,AZ 85721. UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP SLATTERY, WL (reprint author), LOS ALAMOS NATL LAB,X-4 MS F664,LOS ALAMOS,NM 87544, USA. NR 26 TC 28 Z9 28 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD SEP PY 1992 VL 99 IS 1 BP 167 EP 174 DI 10.1016/0019-1035(92)90180-F PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JU782 UT WOS:A1992JU78200015 ER PT J AU LORNELL, K AF LORNELL, K TI 'BLUES HOUSEPARTY' - ELLIS,E, FROST,J SO JOURNAL OF AMERICAN FOLKLORE LA English DT TV Review, Radio Review, Video RP LORNELL, K (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0021-8715 J9 J AM FOLKLORE JI J. Am. Folk. PD FAL PY 1992 VL 105 IS 418 BP 485 EP 486 DI 10.2307/541629 PG 2 WC Folklore SC Arts & Humanities - Other Topics GA JW132 UT WOS:A1992JW13200012 ER PT J AU WARD, DC AF WARD, DC TI BURNSIDE - MARVEL,W SO JOURNAL OF AMERICAN HISTORY LA English DT Book Review RP WARD, DC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION AMER HISTORIANS PI BLOOMINGTON PA 112 N BRYAN ST, BLOOMINGTON, IN 47408 SN 0021-8723 J9 J AM HIST JI J. Am. Hist. PD SEP PY 1992 VL 79 IS 2 BP 668 EP 669 DI 10.2307/2080108 PG 2 WC History SC History GA JN974 UT WOS:A1992JN97400084 ER PT J AU ADAMS, RM AF ADAMS, RM TI A CHALLENGE TO MUSEUMS, ADDRESSING DIVERSITY SO JOURNAL OF ARTS MANAGEMENT LAW AND SOCIETY LA English DT Article RP ADAMS, RM (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU HELDREF PUBLICATIONS PI WASHINGTON PA 1319 EIGHTEENTH ST NW, WASHINGTON, DC 20036-1802 SN 1063-2921 J9 J ART MANAG LAW SOC JI J. Arts Manage. Law Soc. PD FAL PY 1992 VL 22 IS 3 BP 272 EP 276 PG 5 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA LC404 UT WOS:A1992LC40400005 ER PT J AU MCCORRISTON, J AF MCCORRISTON, J TI THE HALAF ENVIRONMENT AND HUMAN ACTIVITIES IN THE KHABUR DRAINAGE, SYRIA SO JOURNAL OF FIELD ARCHAEOLOGY LA English DT Article AB Archaeobotanical studies frequently focus on single site economies; as a result, relatively few such studies in the Near East use plant remains to develop regional perspectives. By comparing farming practices and evidence for plant resources in the vicinities of two contemporary Halaf sites in different environments, this paper offers a first attempt to examine bow peoples of the 5th millennium B. C., linked by their material culture, differed in their adaptation to local environments. RP MCCORRISTON, J (reprint author), SMITHSONIAN INST,DEPT ANTHROPOL,NMNH MRC 112,WASHINGTON,DC 20560, USA. NR 76 TC 6 Z9 6 U1 0 U2 2 PU JOURNAL FIELD ARCHAEOLOGY PI BOSTON PA BOSTON UNIV 675 COMMUNWEALTH AVE, BOSTON, MA 02215 SN 0093-4690 J9 J FIELD ARCHAEOL JI J. Field Archaeol. PD FAL PY 1992 VL 19 IS 3 BP 315 EP 333 DI 10.2307/529920 PG 19 WC Archaeology SC Archaeology GA JK167 UT WOS:A1992JK16700003 ER PT J AU MEGGERS, BJ AF MEGGERS, BJ TI MOUNDBUILDERS OF THE AMAZON - GEOPHYSICAL ARCHAEOLOGY ON MARAJO ISLAND, BRAZIL - ROOSEVELT,AC SO JOURNAL OF FIELD ARCHAEOLOGY LA English DT Book Review RP MEGGERS, BJ (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 17 TC 4 Z9 4 U1 0 U2 2 PU JOURNAL FIELD ARCHAEOLOGY PI BOSTON PA BOSTON UNIV 675 COMMUNWEALTH AVE, BOSTON, MA 02215 SN 0093-4690 J9 J FIELD ARCHAEOL JI J. Field Archaeol. PD FAL PY 1992 VL 19 IS 3 BP 399 EP 404 DI 10.2307/529927 PG 6 WC Archaeology SC Archaeology GA JK167 UT WOS:A1992JK16700011 ER PT J AU WARKENTIN, IG JAMES, PC OLIPHANT, LW AF WARKENTIN, IG JAMES, PC OLIPHANT, LW TI USE OF A PLUMAGE CRITERION FOR AGING FEMALE MERLINS SO JOURNAL OF FIELD ORNITHOLOGY LA English DT Article ID FALCO-COLUMBARIUS; URBAN MERLINS AB A key for distinguishing between adult and yearling female Merlins (Falco columbarius) based on the color of rump plumage was proposed by Temple (1972). Examination of this characteristic in 34 known-age females from a wild population of F. c. richardsonii, caught during three breeding seasons and one winter, indicated discrepancies between the observed rump coloration and that expected based on the predictions of Temple (1972). Two of the nine yearlings examined had some gray (associated with adult plumage) in the rump coloration, and 12 of 25 adults were classified as having a brown rump (associated with yearling plumage). The onset of the change in the rump color of female Merlins appears much more variable, at least in this population of Merlins, than previously described. It would be beneficial to examine this currently accepted aging technique for female Merlins in more detail. C1 SASKATCHEWAN MUSEUM NAT HIST,REGINA S4P 3V7,SASKATCHEWAN,CANADA. UNIV SASKATCHEWAN,DEPT VET ANAT,SASKATOON S7N 0W0,SASKATCHEWAN,CANADA. RP WARKENTIN, IG (reprint author), SMITHSONIAN INST,DEPT ZOOL RES,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 5 TC 1 Z9 1 U1 0 U2 3 PU ASSOC FIELD ORNITHOLOGISTS PI BELOIT PA BELOIT COLLEGE, DEPT BIOLOGY, 700 COLLEGE ST, BELOIT, WI 53511 SN 0273-8570 J9 J FIELD ORNITHOL JI J. Field Ornithol. PD FAL PY 1992 VL 63 IS 4 BP 473 EP 475 PG 3 WC Ornithology SC Zoology GA JZ880 UT WOS:A1992JZ88000012 ER PT J AU STEPHENSEN, CB BLOUNT, SR LANFORD, RE HOLMES, KV MONTALI, RJ FLEENOR, ME SHAW, JFE AF STEPHENSEN, CB BLOUNT, SR LANFORD, RE HOLMES, KV MONTALI, RJ FLEENOR, ME SHAW, JFE TI PREVALENCE OF SERUM ANTIBODIES AGAINST LYMPHOCYTIC CHORIOMENINGITIS VIRUS IN SELECTED POPULATIONS FROM 2 UNITED-STATES CITIES SO JOURNAL OF MEDICAL VIROLOGY LA English DT Article DE ARENAVIRUS; CALLITRICHID; HEPATITIS ID CALLITRICHID HEPATITIS; INFECTIONS; MARMOSETS; TAMARINS AB An ELISA was developed for measuring serum antibodies against the arenavirus lymphocytic choriomeningitis virus (LCMV) and a closely related isolate termed callitrichid hepatitis virus (CHV). The ELISA was used to test sera from healthy adults and from hepatitis patients. In Birmingham, Alabama, the seropositivity rate for healthy black women was 5.1% (7/138), and the rate for patients with all types of hepatitis or cirrhosis was 4.3% (2/46). In San Antonio, Texas, the seropositivity rate among a clinical series of patients with non-A, non-B hepatitis was 0 (0/20), and the rate among persons rejected from blood donation because of high serum alanine aminotransferase levels was 2.4% (2/82). These results indicate that infection with LCMV or CHV is common in Birmingham but that infection is not associated with hepatitis. C1 JEFFERSON CTY DEPT HLTH,BUR DIS CONTROL,BIRMINGHAM,AL. SW FDN BIOMED RES,DEPT VIROL & IMMUNOL,SAN ANTONIO,TX 78284. UNIFORMED SERV UNIV HLTH SCI,DEPT PATHOL,BETHESDA,MD 20814. SMITHSONIAN INST,NATL ZOOL PK,DEPT PATHOL,WASHINGTON,DC 20560. RP STEPHENSEN, CB (reprint author), UNIV ALABAMA,SCH PUBL HLTH,DEPT PUBL HLTH SCI,DIV INT HLTH,BIRMINGHAM,AL 35294, USA. FU NCRR NIH HHS [S07RR05829-07]; NIAID NIH HHS [AI27203] NR 13 TC 26 Z9 27 U1 0 U2 2 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0146-6615 J9 J MED VIROL JI J. Med. Virol. PD SEP PY 1992 VL 38 IS 1 BP 27 EP 31 DI 10.1002/jmv.1890380107 PG 5 WC Virology SC Virology GA JK555 UT WOS:A1992JK55500006 PM 1402829 ER PT J AU HOWARD, JG BARONE, MA DONOGHUE, AM WILDT, DE AF HOWARD, JG BARONE, MA DONOGHUE, AM WILDT, DE TI THE EFFECT OF PREOVULATORY ANESTHESIA ON OVULATION IN LAPAROSCOPICALLY INSEMINATED DOMESTIC CATS SO JOURNAL OF REPRODUCTION AND FERTILITY LA English DT Article DE OVULATION; ANESTHESIA; ARTIFICIAL INSEMINATION; LAPAROSCOPY; CAT ID INTRAUTERINE INSEMINATION; ARTIFICIAL-INSEMINATION; UTERINE INSEMINATION; SPERM TRANSPORT; PREGNANCY; FERTILIZATION; EWES; SPERMATOZOA; INVITRO; OVARIAN AB Laparoscopic intrauterine artificial insemination (AI) of electroejaculated spermatozoa was used to compare embryo development and conception rates in domestic cats inseminated either before or after ovulation. Females were given a single (100 iu) injection of pregnant mares' serum gonadotrophin (PMSG) followed by either 75 or 100 iu human chorionic gonadotrophin (hCG) 80 h later. Cats were anaesthetized (injectable ketamine HCl/acepromazine plus gaseous halothane) 25-50 h after administration of hCG for laparoscopic assessment of ovarian activity and for transabdominal Al into the proximal aspect of the uterine lumen. At the time of Al, 23 cats were pre-ovulatory (25-33 h after hCG injection) and 30 were post-ovulatory (31-50 h after hCG injection). Pre-ovulatory females produced 10.5 +/- 1.1 follicles and no corpora lutea compared with 1.9 +/- 0.5 follicles and 7.5 +/- 0.9 corpora lutea for the post-ovulatory group (P < 0.05). Six days later, the ovaries of nine pre-ovulatory and 12 post-ovulatory females were re-examined and the reproductive tracts flushed. On this day, pre-ovulatory cats produced fewer corpora lutea (2-8 +/- 1.5; P < 0.05) and embryos (0.4 +/- 0.3; P < 0.05) than post-ovulatory females (18.9 +/- 3.3 corpora lutea; 4.6 +/- 1.2 embryos). Two of the 14 cats (14.3%) inseminated before ovulation and not flushed became pregnant compared with 9 of 18 cats (50.0%) inseminated after ovulation and up to 41 h after hCG injection (P < 0.05). These results indicate that ovulation in cats is compromised by pre-ovulatory ketamine HCl/acepromazine/halothane or laparoscopy or by both and that electroejaculated spermatozoa deposited by laparoscopy in utero, after ovulation, result in a relatively high incidence of pregnancy. Because ovulation usually occurs 25-27 h after injection of hCG, the lifespan for fertilization of the ovulated ovum appears to be at least 14 h in vivo in cats. RP HOWARD, JG (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. FU NCRR NIH HHS [RR00045] NR 50 TC 76 Z9 80 U1 0 U2 7 PU J REPROD FERTIL INC PI CAMBRIDGE PA 22 NEWMARKET RD, CAMBRIDGE, ENGLAND CB5 8DT SN 0022-4251 J9 J REPROD FERTIL JI J. Reprod. Fertil. PD SEP PY 1992 VL 96 IS 1 BP 175 EP 186 PG 12 WC Reproductive Biology SC Reproductive Biology GA JT472 UT WOS:A1992JT47200018 PM 1432948 ER PT J AU HOWARD, JG DONOGHUE, AM BARONE, MA GOODROWE, KL BLUMER, ES SNODGRASS, K STARNES, D TUCKER, M BUSH, M WILDT, DE AF HOWARD, JG DONOGHUE, AM BARONE, MA GOODROWE, KL BLUMER, ES SNODGRASS, K STARNES, D TUCKER, M BUSH, M WILDT, DE TI SUCCESSFUL INDUCTION OF OVARIAN ACTIVITY AND LAPAROSCOPIC INTRAUTERINE ARTIFICIAL-INSEMINATION IN THE CHEETAH (ACINONYX-JUBATUS) SO JOURNAL OF ZOO AND WILDLIFE MEDICINE LA English DT Article DE CHEETAH; ACINONYX-JUBATUS; ARTIFICIAL INSEMINATION; INTRAUTERINE; LAPAROSCOPY ID PREMATURE LUTEAL REGRESSION; FELIS-CATUS L; INVITRO FERTILIZATION; DOMESTIC CAT; UTERINE INSEMINATION; SEMEN; SPERMATOZOA; GONADOTROPIN; EJACULATE; OVULATION AB An exogenous gonadotropin regimen and a laparoscopic intrauterine artificial insemination (AI) technique, previously developed in the domestic cat, were adapted and assessed for effectiveness in the cheetah (Acinonyx jubatus). Seven female cheetahs were given an injection of either 200 or 400 IU pregnant mares' serum gonadotropin (PMSG) and either 125 or 250 IU human chorionic gonadotropin (hCG) 80 hr later. At 42.5-47.0 hr after hCG, all females were evaluated laparoscopically for fresh ovarian corpora lutea (CL). Ovulation was induced successfully in all cheetahs (range: 3-13 CL among females). However, two morphologically distinct CL types were observed: 1) large-sized CL that appeared more related to the low gonadotropin dose; 2) small-sized CL that were detected more often in the high gonadotropin dose group. Six of the were laparoscopically inseminated by depositing electroejaculated/processed sperm transabdominally into the proximal aspect of each uterine horn. The Al procedure was simple and rapid, generally requiring only 30 min after laparoscope insertion. One female, induced to ovulate with 200 IU PMSG and 125 IU hCG and inseminated in utero with 10 x 10(6) motile sperm at 42.5 hr post-hCG, produced a pregnancy and a single live cub after a 95-day gestation. Laparoscopic AI appears to have considerable potential as a tool for assisting captive propagation Of the cheetah. C1 METROPOLITAN TORONTO ZOO,TORONTO M1E 4R5,ONTARIO,CANADA. FOSSIL RIM WILDLIFE CTR,GLEN ROSE,TX 76043. CALDWELL ZOO,TYLER,TX 75712. RP HOWARD, JG (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008, USA. NR 49 TC 63 Z9 63 U1 0 U2 13 PU AMER ASSOC Z00 VETERINARIANS PI MEDIA PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063 SN 1042-7260 J9 J ZOO WILDLIFE MED JI J. Zoo Wildl. Med. PD SEP PY 1992 VL 23 IS 3 BP 288 EP 300 PG 13 WC Veterinary Sciences SC Veterinary Sciences GA JP945 UT WOS:A1992JP94500004 ER PT J AU REED, R MONTALI, RJ NICHOLS, DK CITINO, SB AF REED, R MONTALI, RJ NICHOLS, DK CITINO, SB TI CLINICAL CHALLENGE - CASE-1 - HEPATOMEGALY CAUSED BY NONTUBERCULOUS MYCOBACTERIOSIS SO JOURNAL OF ZOO AND WILDLIFE MEDICINE LA English DT Note ID BIRDS C1 TEXAS A&M UNIV SYST,COLL VET MED,COLL STN,TX 77843. RP REED, R (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20002, USA. NR 5 TC 2 Z9 2 U1 0 U2 1 PU AMER ASSOC Z00 VETERINARIANS PI MEDIA PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063 SN 1042-7260 J9 J ZOO WILDLIFE MED JI J. Zoo Wildl. Med. PD SEP PY 1992 VL 23 IS 3 BP 383 EP 386 PG 4 WC Veterinary Sciences SC Veterinary Sciences GA JP945 UT WOS:A1992JP94500017 ER PT J AU BORDEN, CM LUCAS, GR DANIEL, P MILLER, SF FISCHER, MMJ ABEDI, M AF BORDEN, CM LUCAS, GR DANIEL, P MILLER, SF FISCHER, MMJ ABEDI, M TI KNOWLEDGE COLLABORATIONS IN THE ARTS, THE SCIENCES, AND THE HUMANITIES .3. THE HUMANITIES AND SOCIAL-SCIENCES SO KNOWLEDGE-CREATION DIFFUSION UTILIZATION LA English DT Discussion AB In this excerpt from a series of seminars on knowledge generation in the arts, the sciences, and the humanities, scholars of philosophy, history, and anthropology explore the meaning of collaboration in their respective fields. The seminars, held at the Smithsonian Institution during 1991, compared the goals, techniques, and myths of creative and scholarly collaboration. C1 SMITHSONIAN INST,CTR FOLKLIFE PROGRAMS & CULTURAL STUDIES,WASHINGTON,DC 20560. SMITHSONIAN INST,OFF INTERDISCIPLINARY STUDIES,WASHINGTON,DC 20560. NATL ENDOWMENT HUMANITIES,WASHINGTON,DC 20506. UNIV MARYLAND,COLL PK,MD 20742. RICE UNIV,HOUSTON,TX 77251. NR 10 TC 0 Z9 0 U1 0 U2 1 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0164-0259 J9 KNOWLEDGE PD SEP PY 1992 VL 14 IS 1 BP 110 EP 132 PG 23 WC Social Sciences, Interdisciplinary SC Social Sciences - Other Topics GA JJ669 UT WOS:A1992JJ66900006 ER PT J AU BORDEN, CM AF BORDEN, CM TI KNOWLEDGE COLLABORATIONS IN THE ARTS, THE SCIENCES, AND THE HUMANITIES .4. COLLABORATION, FOR BETTER OR FOR WORSE SO KNOWLEDGE-CREATION DIFFUSION UTILIZATION LA English DT Article AB In this overview of three Smithsonian Institution seminars on collaboration excerpted in issues of Knowledge, the seminar organizer draws on highlights of the discussions and additional sources to describe the practice and purpose of collaboration in general, as well as in a number of specific, different fields of inquiry. Looking at conditions that affect not only the opportunities for collaboration but also its likelihood of success, the author posits possible relationships among collaboration, interdisciplinarity, and specialization. Collaborative work never seems to be valued more highly than individual effort, yet it is apparently unavoidable in the world of learning, and is growing in quantity and scope. C1 SMITHSONIAN INST,OFF INTERDISCIPLINARY STUDIES,WASHINGTON,DC 20560. NR 4 TC 0 Z9 0 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0164-0259 J9 KNOWLEDGE PD SEP PY 1992 VL 14 IS 1 BP 133 EP 142 PG 10 WC Social Sciences, Interdisciplinary SC Social Sciences - Other Topics GA JJ669 UT WOS:A1992JJ66900007 ER PT J AU GOODWAY, M AF GOODWAY, M TI METALS OF MUSIC SO MATERIALS CHARACTERIZATION LA English DT Article AB Musical instruments, such as brass wind instruments, flutes, organs, and bells, use metals in many forms. Two of these forms-bronze gongs of the Ifugao and iron harpsichord strings of the Baroque period-were studied in the Smithsonian's Conservation Analytical Laboratory. The ferrous strings from harpsichords of the 18th Century were drawn from iron that was strengthened with phosphorus, not steel, as had been supposed from their evident strength. The gongs were made from a high tin (ca. 22-23%) bronze alloy by a technique of hot forging and quenching more familiar from the smithing of iron. This alloy and its forming technique were in use for millennia, only recently being superseded in modern metallurgical applications by stainless steel. RP GOODWAY, M (reprint author), SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560, USA. NR 33 TC 2 Z9 2 U1 0 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-5803 J9 MATER CHARACT JI Mater. Charact. PD SEP PY 1992 VL 29 IS 2 BP 177 EP 184 DI 10.1016/1044-5803(92)90113-V PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science, Characterization & Testing SC Materials Science; Metallurgy & Metallurgical Engineering GA JX983 UT WOS:A1992JX98300008 ER PT J AU LOWEN, RS AF LOWEN, RS TI EXPLOITING A WONDERFUL OPPORTUNITY - THE PATRONAGE OF SCIENTIFIC-RESEARCH AT STANFORD-UNIVERSITY, 1937-1965 SO MINERVA LA English DT Article RP LOWEN, RS (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 73 TC 6 Z9 6 U1 0 U2 0 PU MINERVA PI LONDON PA 19 NOTTINGHAM ROAD, LONDON, ENGLAND SW17 7EA SN 0026-4695 J9 MINERVA JI Minerva PD FAL PY 1992 VL 30 IS 3 BP 391 EP 421 DI 10.1007/BF01097645 PG 31 WC Education & Educational Research; History & Philosophy Of Science; Social Sciences, Interdisciplinary SC Education & Educational Research; History & Philosophy of Science; Social Sciences - Other Topics GA JX190 UT WOS:A1992JX19000004 PM 11612903 ER PT J AU MELDER, K AF MELDER, K TI NEITHER BALLOTS NOR BULLETS - WOMEN ABOLITIONISTS AND THE CIVIL-WAR - VENET,WH SO NEW ENGLAND QUARTERLY-A HISTORICAL REVIEW OF NEW ENGLAND LIFE AND LETTERS LA English DT Book Review RP MELDER, K (reprint author), SMITHSONIAN INST,POLIT HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU NEW ENGLAND QUARTERLY INC PI BOSTON PA MESERVE HALL 243 NORTHEASTERN UNIV 360 HUNTINGTON AVE, BOSTON, MA 02115 SN 0028-4866 J9 NEW ENGL QUART JI New Engl. Q.-Hist. Rev. New Engl. Life Lett. PD SEP PY 1992 VL 65 IS 3 BP 521 EP 523 DI 10.2307/366343 PG 3 WC History; Literature, American SC History; Literature GA JT851 UT WOS:A1992JT85100021 ER PT J AU BUDD, AF COATES, AG AF BUDD, AF COATES, AG TI NONPROGRESSIVE EVOLUTION IN A CLADE OF CRETACEOUS MONTASTRAEA-LIKE CORALS SO PALEOBIOLOGY LA English DT Article ID NEOGENE BRYOZOAN; REEF-CORALS; PATTERNS; TRENDS; SYSTEMATICS; PARSIMONY; SELECTION; TEMPO AB A phylogeny of Cretaceous Montastraea-like corals was constructed and used to evaluate the importance of differential speciation, selective extinction, and developmental constraints in the evolutionary history of the clade. Colonies assembled from localities across the central and western Tethyan region were subdivided into four stratigraphic levels: (1) Neocomian to lower Albian, (2) upper Albian to Cenomanian, (3) Turonian to Campanian, and (4) Maastrichtian. Ten corallite characters were measured on transverse thin sections of each colony, and analyzed following a three-step procedure: (1) species were recognized using all-inclusive average linkage cluster analyses (UPGMA) and a series of iterative canonical discriminant analyses; (2) species were separated by stratigraphic level and linked between levels by comparative analysis of the resulting discriminant scores; and (3) ancestor-descendant relationships were interpreted within and among adjacent levels using phenetic and cladistic approaches. A composite tree was then examined with respect to biogeography. The results suggest that a total of 16 species existed during the Cretaceous, only 2 of which extended between stratigraphic levels. Speciation events between levels 1 and 2 were associated with the radiation of "small-corallite" forms from a "large-corallite" form, as its distribution expanded southward into the Tethyan realm. Limited speciation and stasis predominated among species within the clade between levels 2 and 3. Speciation events between levels 3 and 4 were associated with the radiation of predominantly "large-corallite" forms from a "small-corallite" form, as the clade became restricted to the Caribbean. Extinction initially focussed on "small-corallite" forms, but later shifted to "large-corallite" forms. Morphologic change was constrained between two extremes, the lower limit of which involved a minimum corallite diameter possibly set by developmental or ecological constraints, and the upper by limitations to increases in number of septa. The overall net result was that of nonprogressive evolution within the clade. C1 SMITHSONIAN TROP RES INST,BALBOA,PANAMA. RP BUDD, AF (reprint author), UNIV IOWA,DEPT GEOL,IOWA CITY,IA 52242, USA. NR 71 TC 24 Z9 27 U1 0 U2 2 PU PALEONTOLOGICAL SOC INC PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044 SN 0094-8373 J9 PALEOBIOLOGY JI Paleobiology PD FAL PY 1992 VL 18 IS 4 BP 425 EP 446 PG 22 WC Biodiversity Conservation; Ecology; Evolutionary Biology; Paleontology SC Biodiversity & Conservation; Environmental Sciences & Ecology; Evolutionary Biology; Paleontology GA JW517 UT WOS:A1992JW51700005 ER PT J AU YANG, XZ BURGDORFER, J AF YANG, XZ BURGDORFER, J TI PARAMETRIC CORRELATIONS AND DIFFUSION IN QUANTUM SPECTRA SO PHYSICAL REVIEW A LA English DT Article ID MULTIPLE AVOIDED CROSSINGS; STATISTICAL PROPERTIES; ENERGY-LEVELS; SEMICLASSICAL THEORY; GLASS-TRANSITION; CHAOTIC SYSTEMS; DISTRIBUTIONS; DYNAMICS AB The evolution of the quantum spectrum as the function of a control parameter can be mapped onto the molecular dynamics of a classical many-body system. This approach is used to study the parametric motion of energy levels in classically mostly regular and in mostly chaotic regimes. The parametric energy-level dynamics is described in terms of the velocity autocorrelation function and the friction kernel of a disordered many-body system. We show that the parametric dynamics is sensitively dependent on the underlying classical dynamics, and therefore provide new measures of quantum chaology. The transition from classically regular to chaotic motion manifests itself in the disappearance of parametric diffusion. Semiclassical arguments give analytic approximations for the spectrum of the velocity auto-correlation function, and these approximations are found to be consistent with numerical calculations for the vibronic motion of a triatomic molecule. We compare these autocorrelation functions with those found in gases, liquids, and glasses. C1 UNIV TENNESSEE, DEPT PHYS, KNOXVILLE, TN 37996 USA. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA 02138 USA. NR 36 TC 11 Z9 11 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9926 EI 2469-9934 J9 PHYS REV A JI Phys. Rev. A PD SEP 1 PY 1992 VL 46 IS 5 BP 2295 EP 2303 DI 10.1103/PhysRevA.46.2295 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JM063 UT WOS:A1992JM06300019 ER PT J AU GARTON, WRS YOSHINO, K AF GARTON, WRS YOSHINO, K TI TANAKA,YOSHIO - OBITUARY SO PHYSICS TODAY LA English DT Item About an Individual C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP GARTON, WRS (reprint author), UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON SW7 2AZ,ENGLAND. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD SEP PY 1992 VL 45 IS 9 BP 90 EP 90 DI 10.1063/1.2809819 PG 1 WC Physics, Multidisciplinary SC Physics GA JM395 UT WOS:A1992JM39500019 ER PT J AU RASMUSSEN, HN AF RASMUSSEN, HN TI SEED DORMANCY PATTERNS IN EPIPACTIS-PALUSTRIS (ORCHIDACEAE), REQUIREMENTS FOR GERMINATION AND ESTABLISHMENT OF MYCORRHIZA SO PHYSIOLOGIA PLANTARUM LA English DT Article DE COLD STRATIFICATION; EPIPACTIS-PALUSTRIS; MYCORRHIZA; ORCHIDACEAE; SCARIFICATION; SEED DORMANCY ID WESTERN EUROPEAN ORCHIDS; INVITRO GERMINATION; GOODYERA-REPENS AB Some terrestrial orchid species, including Epipactis palustris (L.) Crantz, are considered extremely difficult to germinate and cultivate in vitro. Observations of orchids germinating in nature are very few, and the timing and requirements for seedling establishment are unknown for most species. Seeds of E. palustris were incubated in vitro with an appropriate fungus, but germination was poor unless several other conditions were also met: scarification of the testa in Ca(OCl)2, an initial incubation for several weeks at 20-degrees-C, and a subsequent cold stratification for 8-12 weeks at 4-8-degrees-C. With these pretreatments, germination responses exceeded 50% after incubation for 4 weeks at 20-degrees-C. Healthy protocorms with normal organ development were only produced by symbiotic culture following this lengthy seed preparation. The findings suggest that under natural conditions the seeds need some after-ripening, and the testa needs to be partially decomposed before germination. The requirement for chilling suggests that germination of seeds in situ occurs in spring. RP RASMUSSEN, HN (reprint author), SMITHSONIAN ENVIRONM RES CTR,POB 28,EDGEWATER,MD 21037, USA. RI Rasmussen, Hanne/P-5485-2014 OI Rasmussen, Hanne/0000-0002-0181-9304 NR 31 TC 20 Z9 25 U1 0 U2 19 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0031-9317 J9 PHYSIOL PLANTARUM JI Physiol. Plant. PD SEP PY 1992 VL 86 IS 1 BP 161 EP 167 PG 7 WC Plant Sciences SC Plant Sciences GA JQ600 UT WOS:A1992JQ60000023 ER PT J AU KUIJKEN, K AF KUIJKEN, K TI ON THE ELLIPTICITY OF THE GALACTIC DISK SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article; Proceedings Paper CT 1ST ANNUAL HUBBLE FELLOWS SYMP CY OCT 22-23, 1991 CL SPACE TELESCOPE SCI INST, BALTIMORE, MD SP NASA HO SPACE TELESCOPE SCI INST ID GALAXY; SHAPE AB We investigate the available kinematic constraints on the ellipticity of the Galactic disk. In the solar neighborhood the only suggestion for nonaxisymmetry is an anomalous value for the ratio of tangential to radial-velocity dispersions. This can be explained by postulating that the Galactic disk is slightly elliptical, and that the Sun lies near a symmetry axis of the disk. The observed asymmetries of the large-scale gas distribution in the Galaxy are also briefly discussed. RP KUIJKEN, K (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD SEP PY 1992 VL 104 IS 679 BP 809 EP 811 DI 10.1086/133058 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JP620 UT WOS:A1992JP62000016 ER PT J AU ADAMS, RMC AF ADAMS, RMC TI SMITHSONIAN HORIZONS SO SMITHSONIAN LA English DT Note RP ADAMS, RMC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SMITHSONIAN ASSOCIATES PI WASHINGTON PA 900 JEFFERSON DRIVE, WASHINGTON, DC 20560 SN 0037-7333 J9 SMITHSONIAN JI Smithsonian PD SEP PY 1992 VL 23 IS 6 BP 8 EP 8 PG 1 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA JK494 UT WOS:A1992JK49400001 ER PT J AU DONAHUE, RA BALIUNAS, SL AF DONAHUE, RA BALIUNAS, SL TI PERIODOGRAM ANALYSIS OF 240 YEARS OF SUNSPOT RECORDS SO SOLAR PHYSICS LA English DT Article ID LONG-TERM PERIODICITIES; TIME-SERIES ANALYSIS; SOLAR-ACTIVITY; MAUNDER MINIMUM; COOL STARS; EMISSION; CLIMATE; CYCLE AB We have analyzed the direct records of sunspot number between 1749 and 1990 with the same technique currently used in the study of stellar activity cycles observed with Mount Wilson Observatory's 60-inch telescope. In order to mimic the stellar time series, which span only two decades, we analyzed twenty- and fifty-year intervals of the sunspot data in comparison to the entire record. We also examined the reliability of the oldest (pre-1850) sunspot records. The mean solar cycle period determined from the entire record (1749-1990) is 11.04 yr with a computed precision of +/- 0.01 yr, but an overall accuracy of only +/- 1 yr. The large uncertainty is caused by variation of the cycle period with time and not observational uncertainty. The 'correct' sunspot period is found slightly more often (82%) in 50-year intervals compared to 20-year (74%). The cause is twofold: first, a more precise period results from the longer sample length, and second, other periodicities exist in the sunspot record. so that a more accurate determination of the dominant 11.0-year period results from the longer time series. As a guideline for cycle periodicities in other stars, the solar results indicate that the 50-year intervals would produce more precise and accurate periods than the 20-year time series. On the other hand, useful statistics concerning long-term activity could be obtained from a less-frequently sampled group of stars that is substantially larger than the group of approximately 100 lower Main-Sequence stars currently observed at Mount Wilson, although knowledge of short-term variability would be sacrificed. C1 TENNESSEE STATE UNIV,CTR EXCELLENCE INFORMAT SYST,NASHVILLE,TN 37203. TENNESSEE STATE UNIV,HARVARD SMITHSONIAN CTR ASTROPHYS,NASHVILLE,TN 37203. RP DONAHUE, RA (reprint author), NEW MEXICO STATE UNIV,DEPT ASTRON,LAS CRUCES,NM 88003, USA. NR 36 TC 14 Z9 15 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD SEP PY 1992 VL 141 IS 1 BP 181 EP 197 DI 10.1007/BF00155911 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JP366 UT WOS:A1992JP36600012 ER PT J AU GREGORY, B AF GREGORY, B TI THE INITIAL HURDLE SO SCIENTIST LA English DT Letter RP GREGORY, B (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SCIENTIST INC PI PHILADELPHIA PA 3600 MARKET ST SUITE 450, PHILADELPHIA, PA 19104 SN 0890-3670 J9 SCIENTIST JI Scientist PD AUG 31 PY 1992 VL 6 IS 17 BP 12 EP 12 PG 1 WC Information Science & Library Science; Multidisciplinary Sciences SC Information Science & Library Science; Science & Technology - Other Topics GA JK509 UT WOS:A1992JK50900012 ER PT J AU PAVRI, B HEAD, JW KLOSE, KB WILSON, L AF PAVRI, B HEAD, JW KLOSE, KB WILSON, L TI STEEP-SIDED DOMES ON VENUS - CHARACTERISTICS, GEOLOGIC SETTING, AND ERUPTION CONDITIONS FROM MAGELLAN DATA SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID LONG-VALLEY CALDERA; MAGMA CHAMBERS; SURFACE; CALIFORNIA; VOLCANISM; ORIGIN; REFLECTIVITY; ROUGHNESS; DYNAMICS; GROWTH AB Distinctive steep-sided flat-topped domes have been discovered in the Magellan images of Venus. These domes have similar characteristics to terrestrial domes formed by viscous andesitic, dacitic, and rhyolitic lavas. A survey of more than 95% of the surface reveals 145 such features ranging from less than 10 km to almost 100 km in diameter, with a mean diameter of 23.8 km and a mean height of about 700 m. The domes are 10-100 Limes wider and have volumes (25-3400 km3) orders of magnitude larger than analogous terrestrial features. The morphology of many of the domes suggests that they were emplaced in a single continuous mode rather than episodically. The domes are widely distributed over the planet (including one near the Venera 8 site) and occur preferentially in association with coronae and in plains adjacent to regional occurrences of tessera. They show no strong correlation with latitude and longitude, but are preferentially concentrated at altitudes near and just below the mean planetary radius; this altitude concentration may be related to the preferential development of neutral buoyancy zones and magma reservoirs at intermediate to higher altitudes. The common association of domes with coronae appears to be an indication of the importance of magma upwelling and magma reservoirs in the formation of domes. The probability that magma reservoirs on Venus will grow to unusually large sizes favors large-scale differentiation processes in such magma reservoirs. This suggests that production of large-volume magma bodies by in situ processes such as fractional crystallization or volatile enhancement is entirely plausible. The association with tesserae may be related to ab initio processes of melting of preexisting crust of evolved composition by stalling of basaltic magma at neutral buoyancy zones, comparable to the environment on terrestrial continents. The resemblance of the Venus domes to terrestrial rhyolite and dacite domes provides possible evidence for the emplacement of high viscosity magma on Venus. The extremely large volumes of the domes and evidence for their emplacement in a continuous mode has led us to develop two models for the emplacement of the Venus domes. In the compositionally evolved magma model, the high apparent viscosity is due to differentiation and evolution of basaltic magma to produce silicic magmas. Magmas with such compositions and viscosities can be erupted on Venus through fissures of plausible widths and at rates comparable to those observed on Earth; terrestrial rhyolite flows with volumes of 200 km3 are known. A related possibility is that the domes are the undisrupted Venus equivalent of terrestrial ignimbrite-producing eruptions. The second model is a basaltic bubble enhancement model, in which the high apparent viscosity is due to the extrusion of basaltic foams following volatile enhancement in the upper pan of a magma reservoir. Large volumes and single eruptive phases are plausible because of low magma viscosity during ascent, high viscosity on the surface, and enhanced bulk volume (compared to magmatic volume) caused by the high bubble content. C1 SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA 02139. UNIV LANCASTER,DIV ENVIRONM SCI,LANCASTER LA1 4YQ,ENGLAND. RP PAVRI, B (reprint author), BROWN UNIV,DEPT GEOL SCI,PROVIDENCE,RI 02912, USA. NR 78 TC 68 Z9 70 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD AUG 25 PY 1992 VL 97 IS E8 BP 13445 EP 13478 PG 34 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JP211 UT WOS:A1992JP21100015 ER PT J AU ASIMOW, PD WOOD, JA AF ASIMOW, PD WOOD, JA TI FLUID OUTFLOWS FROM VENUS IMPACT CRATERS - ANALYSIS FROM MAGELLAN DATA SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID ERUPTION; FLOW AB Many impact craters on Venus have unusual outflow features originating in or under the continuous ejecta blankets and continuing downhill into the surrounding terrain. These features clearly resulted from flow of low-viscosity fluids, but the identity of those fluids is not clear. In particular, it should not be assumed a priori that the fluid is an impact melt. A number of candidate processes by which impact events might generate the observed features arc considered, and predictions arc made concerning the rheological character of flows produced by each mechanism. A sample of outflows was analyzed using Magellan images and a model of unconstrained Bingham plastic flow on inclined planes, leading to estimates of viscosity and yield strength for the flow materials. It is argued that at least two different mechanisms have produced outflows on Venus: an erosive, channel-forming process and a depositional process. The erosive fluid is probably an impact melt, but the depositional fluid may consist of fluidized solid debris, vaporized material, and/or melt. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. HARVARD UNIV,DEPT EARTH & PLANETARY SCI,CAMBRIDGE,MA 02138. RI Asimow, Paul/E-7451-2010 OI Asimow, Paul/0000-0001-6025-8925 NR 45 TC 15 Z9 15 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD AUG 25 PY 1992 VL 97 IS E8 BP 13643 EP 13665 PG 23 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JP211 UT WOS:A1992JP21100025 ER PT J AU EKLUND, J AF EKLUND, J TI POLYMERS IN HISTORICAL-PERSPECTIVE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SMITHSONIAN INST,NATL MUSEUM AMER HIST,DEPT HIST SCI,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 23 PY 1992 VL 204 BP 289 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA JJ313 UT WOS:A1992JJ31301485 ER PT J AU LANGE, EB BAKER, MT MCMANUS, E AF LANGE, EB BAKER, MT MCMANUS, E TI IMPLICATIONS OF COLD-STORAGE ON THE NATIONS COLLECTION OF SPACE SUITS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SMITHSONIAN INST,CONSERV ANALYT LAB,MRC 534,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 23 PY 1992 VL 204 BP 291 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA JJ313 UT WOS:A1992JJ31301487 ER PT J AU ERLEBACHER, JD MECKLENBURG, MF TUMOSA, CS AF ERLEBACHER, JD MECKLENBURG, MF TUMOSA, CS TI THE MECHANICAL-BEHAVIOR OF ARTISTS ACRYLIC PAINTS WITH CHANGING TEMPERATURE AND RELATIVE-HUMIDITY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. RI Erlebacher, Jonah/A-3231-2010 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 23 PY 1992 VL 204 BP 317 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA JJ313 UT WOS:A1992JJ31301513 ER PT J AU KLEIN, E TSANG, JS BAKER, M AF KLEIN, E TSANG, JS BAKER, M TI NONINSTRUMENTAL TECHNIQUES FOR THE CHARACTERIZATION AND IDENTIFICATION OF ARTISTS ACRYLIC PAINTS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 23 PY 1992 VL 204 BP 319 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA JJ313 UT WOS:A1992JJ31301515 ER PT J AU BALLARD, M CZUBAY, P AF BALLARD, M CZUBAY, P TI LATEX MISUSE ON HISTORIC CARPETS AND TEXTILES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SMITHSONIAN INST,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 23 PY 1992 VL 204 BP 344 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA JJ313 UT WOS:A1992JJ31301540 ER PT J AU TRAUB, WA JOHNSON, DG JUCKS, KW CHANCE, KV AF TRAUB, WA JOHNSON, DG JUCKS, KW CHANCE, KV TI UPPER LIMIT FOR STRATOSPHERIC HBR USING FAR-INFRARED THERMAL EMISSION-SPECTROSCOPY SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID NEAR-ULTRAVIOLET SPECTROSCOPY; MCMURDO STATION; BRO; ANTARCTICA; BROMINE; OCLO AB We measure an upper limit for stratospheric HBr from three balloon flights. The observations were made with the FIRS-2 far-infrared Fourier transform spectrometer. The 1-sigma upper limits from the 1988, 1989 and 1990 balloon flights are 13 pptv at 35 km, 7 pptv at 32 km, and 3 pptv at 31 km, respectively. Combining all 3 flights, the weighted average 1-sigma upper limit for HBr is 4 pptv at 32 km. This value is significantly smaller than the only other previously published spectroscopic value of 20 +/- 7 pptv (2-sigma), but is consistent with (albeit well in excess of) a theoretical estimate which predicts roughly 0.4 pptv at this altitude. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. RI Johnson, David/F-2376-2015; OI Johnson, David/0000-0003-4399-5653; Chance, Kelly/0000-0002-7339-7577 NR 14 TC 14 Z9 14 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD AUG 21 PY 1992 VL 19 IS 16 BP 1651 EP 1654 DI 10.1029/92GL01800 PG 4 WC Geosciences, Multidisciplinary SC Geology GA JL393 UT WOS:A1992JL39300007 ER PT J AU MARKEVITCH, M BLUMENTHAL, GR FORMAN, W JONES, C SUNYAEV, RA AF MARKEVITCH, M BLUMENTHAL, GR FORMAN, W JONES, C SUNYAEV, RA TI ARCMINUTE FLUCTUATIONS IN THE MICROWAVE BACKGROUND FROM CLUSTERS OF GALAXIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC MICROWAVE BACKGROUND; COSMOLOGY, THEORY; GALAXIES, CLUSTERING ID COLD DARK MATTER; LARGE-SCALE STRUCTURE; LUMINOSITY FUNCTION; INTRACLUSTER MEDIUM; RICH CLUSTERS; EVOLUTION; RADIATION; ANISOTROPY; GAS; CONDENSATION AB Lower limits on the cosmological density parameter-OMEGA, in the framework of self-similar cluster evolution, are derived from observed upper limits to the cosmic microwave background anisotropy on arcminute scales. We also consider models with no cluster evolution. Using the present-epoch X-ray cluster data, we simulate images of the cosmic microwave background radiation (CMBR) fluctuations produced by Compton scattering of the background photons with hot gas in clusters, under conservative assumptions about radiative cooling and the gas density profile. Simulated images calculated for different values of OMEGA and for a range of spectra of primordial density fluctuations are convolved with the antenna patterns from two experiments and compared with observations. Combining the two experiments, the 95% confidence lower limit for OMEGA is found to be approximately 1/10 for a primordial fluctuation spectral index n = -1 (which approximates the CDM mass spectrum for clusters), while for n = 0 it is 1/7; and for n = +1 the limit is OMEGA > 115, if the gas density profile extends to 5 core radii. With the less conservative assumption that the gas density extends to 8 core radii, we derive lower limits on OMEGA of 1/5, 1/3, and 0.6 (for n = -1, 0, and +1). These limits assume a Hubble constant of 50 km s-1 Mpc-1, but changing H0 from 50 to 75 km s-1 Mpc-1 modifies the confidence levels by only a few percent. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP MARKEVITCH, M (reprint author), MOSCOW INST SPACE RES,MOSCOW,USSR. OI Forman, William/0000-0002-9478-1682 NR 75 TC 26 Z9 26 U1 0 U2 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 AUG 20 PY 1992 VL 395 IS 2 BP 326 EP 338 DI 10.1086/171655 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH628 UT WOS:A1992JH62800002 ER PT J AU BOTHUN, GD GELLER, MJ KURTZ, MJ HUCHRA, JP SCHILD, RE AF BOTHUN, GD GELLER, MJ KURTZ, MJ HUCHRA, JP SCHILD, RE TI THE VELOCITY-DISTANCE RELATION FOR GALAXIES ON A BUBBLE SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, CLUSTERING; GALAXIES, DISTANCES AND REDSHIFTS; MHD ID TULLY-FISHER RELATION; COLD DARK MATTER; SPIRAL GALAXIES; LOCAL SUPERCLUSTER; REDSHIFT SURVEY; WIDTH RELATION; UNIVERSE; CLUSTERS; SCALE; PHOTOMETRY AB We use the I-band Tully-Fisher (TF) relation to measure relative distances to galaxies on the edges of the largest (approximately 5000 km s-1) void in the first slice of the Center for Astrophysics redshift survey extension. We divide the data into three samples: H (seven galaxies) on the high-velocity edge of the void, L (10 galaxies) along the low-velocity edge, and P (nine galaxies) distributed nearly along the line of sight adjacent to the Coma cluster. We show that sample P is infalling toward Coma. For samples H and L the scatter about the Hubble diagram is 0.m18, comparable with the error in an individual I-band TF measurement. The ratio of I-band TF distances to the high- and low-velocity boundaries (samples H and L) is 2.22(-0.10)+0.11 and the ratio of velocities is 2.16 +/- 0.08. In other words, to within the error the void has the same diameter in real and redshift space. The mean peculiar velocity of sample L is 32 +/- 108 km s-1; for sample H it is -113 +/- 253 km s-1. In other words, the data are consistent with no outflow from the void and the 1-sigma upper limit to outflow from the void is approximately 5% of the void diameter. For a simple model, the 2-sigma limits on the outflow yield OMEGA less than or similar to 1. We detect the "infall" of sample P toward Coma at better than the 3-sigma level: the line-of-sight component of the infall is 915 +/- 263 km s-1 at a distance of 26 h-1 Mpc (H0 = 100 h km s-1 Mpc-1) from the center of the Coma cluster. For spherically symmetric infall, the implied value of OMEGA = 2.2(-2)+20 the 2-sigma error includes only the error in the infall measurement and ignores the large error in the extrapolated density of the Coma cluster. C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP UNIV OREGON, DEPT PHYS, EUGENE, OR 97403 USA. RI KURTZ, Michael /B-3890-2009; OI Kurtz, Michael/0000-0002-6949-0090 NR 53 TC 19 Z9 19 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD AUG 20 PY 1992 VL 395 IS 2 BP 347 EP 359 DI 10.1086/171657 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH628 UT WOS:A1992JH62800004 ER PT J AU SCHMIDT, BP KIRSHNER, RP EASTMAN, RG AF SCHMIDT, BP KIRSHNER, RP EASTMAN, RG TI EXPANDING PHOTOSPHERES OF TYPE-II SUPERNOVAE AND THE EXTRAGALACTIC DISTANCE SCALE SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; DISTANCE SCALE; SUPERNOVAE, GENERAL ID LARGE MAGELLANIC CLOUD; LOW-DENSITY PHOTOSPHERES; SURFACE-BRIGHTNESS FLUCTUATIONS; VELOCITY-WIDTH RELATION; PLANETARY-NEBULAE; STANDARD CANDLES; HUBBLE CONSTANT; SPECTRAL FLUX; ELLIPTICAL GALAXIES; NEARBY GALAXIES AB We use the Expanding Photosphere Method to determine distances to 10 Type II supernovae. The effects of asymmetries, extinction, and flux dilution are explored. Using empirical evidence and time-dependent, spherical models which treat H and He in non-LTE, we show that blackbody corrections caused by flux dilution are small for Type II supernovae in the infrared, and in the optical when their color temperatures are less than 6000 K. The extinction to a Type II-P supernova can be estimated from its light curve: the uncertainty introduced into a distance measurement due to extinction is usually less than 10%. Correcting for extinction and flux dilution, we derive distances to 10 supernovae: SN 1968L, SN 1969L, SN 1970G, SN 1973R, SN 1979C, SN 1980K, SN 1987A, SN 1988A, SN 1990E, and SN 1990ae. The distance measurements span a wide range, 50 kpc to 120 Mpc, which is unique among the methods for establishing the extragalactic distance scale. The distances measured to SN 1970G in M101 and SN 1987A in the LMC are in good agreement with distances determined from Cepheid variable stars. Our distance to the Virgo Cluster, 22 +/- 3 Mpc, is larger than recent distance estimates made using surface brightness fluctuations, planetary nebula luminosity functions, and the Tully-Fisher method. Using the distances determined from these Type II supernovae, we derive a value of H-0 = 60 +/- 10 km s-1 Mpc-1. This value is subject to errors caused by local deviations in the Hubble flow but will soon be improved by applying the Expanding Photosphere Method to several distant Type II supernovae. C1 UNIV CALIF SANTA CRUZ,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064. RP SCHMIDT, BP (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Schmidt, Brian/0000-0001-6589-1287 NR 125 TC 114 Z9 114 U1 0 U2 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 AUG 20 PY 1992 VL 395 IS 2 BP 366 EP 386 DI 10.1086/171659 PN 1 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH628 UT WOS:A1992JH62800006 ER PT J AU WHITNEY, BA HARTMANN, L AF WHITNEY, BA HARTMANN, L TI MODEL SCATTERING ENVELOPES OF YOUNG STELLAR OBJECTS .1. METHOD AND APPLICATION TO CIRCUMSTELLAR DISKS SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; POLARIZATION; RADIATIVE TRANSFER; STARS, PRE-MAIN-SEQUENCE ID T-TAURI STARS; INFRARED POLARIZATION; THOMSON SCATTERING; HL TAURI; DUST; EVOLUTION; ACCRETION; SPECTRA; NEBULAE; IMAGES AB We describe a Monte Carlo code that accurately treats multiple scattering, absorption, and polarization by dust, and use this code to calculate images of dusty disks around young stellar objects. We present some approximate analytic results that describe the behavior of the Monte Carlo calculations. A geometrically thin disk illuminated by a central T Tauri star scatters very little light at distances of many AU from the star. Viewed at any inclination, the flux scattered by such a disk at the distance to the nearest star-forming region will be overwhelmed by the stellar image. An optically thick disk that has a "flaring" surface may be observable, especially if viewed nearly edge-on so that the stellar source becomes occulted. An optically thin disk with a finite opening angle, similar to the one surrounding beta-Pictoris, is about as observable as the typical flared optically thick disk at a similar distance from the Earth. The polarization position angle is perpendicular to the disk plane in all of the models, in contrast to observations of many young stellar objects which have the position angle oriented parallel to the presumed disk plane. We suggest that the scattered light structures observed around many pre-main-sequence objects are dusty envelopes rather than disks. RP WHITNEY, BA (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 36 TC 180 Z9 181 U1 0 U2 0 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 BP 529 EP 539 DI 10.1086/171673 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH628 UT WOS:A1992JH62800020 ER PT J AU HERANT, M BENZ, W COLGATE, S AF HERANT, M BENZ, W COLGATE, S TI POSTCOLLAPSE HYDRODYNAMICS OF SN-1987A - 2-DIMENSIONAL SIMULATIONS OF THE EARLY EVOLUTION SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDRODYNAMICS; STARS, INDIVIDUAL (SN-1987A); STARS, NEUTRON; SUPERNOVAE, INDIVIDUAL (SN-1987A) ID SUPERNOVA 1987A; LINE-PROFILES; CORE-COLLAPSE; LIGHT-CURVE; EMISSION; INSTABILITIES; ANNIHILATION; EXPLOSIONS; NEUTRINOS; ENVELOPE AB We present the results of simulations in two spatial dimensions of the very early phases of the explosion of SN 1987A. Starting our calculations close to the time when the prompt shock emerges from the neutrino-sphere, we simulate the first few seconds of the explosion using a two-dimensional cylindrical geometry smooth particle hydrodynamics (SPH) code. The explosion energy is obtained, as in the delayed mechanism, by tapping a small fraction of the energy carried by the neutrinos produced in the making of the neutron star. The success of the explosion is determined to be sensitive to the duration of the infall, the timing of the bounce, and the subsequent neutrino heating. Using a semianalytical model for the initial structure of the collapsed object, we present two simulations that differ by the mass that has been allowed to collapse into a neutron star prior to the bounce. In the case of a short initial infall (1.37 M. baryon mass proto-neutron star), the explosion fails due to excessive cooling. For a longer initial infall (1.5 M. baryon mass proto-neutron star), the cooling is less and the explosion is successful although relatively weak [approximately 0.35 foe (10(51) ergs)]. We show that in this case, a successful explosion is brought about by the presence of an entropy gradient which, combined with the gravitational pull of the neutron star, leads to extremely strong instabilities. In such models, convective currents carry the deposited energy away from the neutron star and bring in new, cold material, thus preventing excessive neutrino cooling. The flow is coherent on very large scales and does not lead to microscopic mixing. The critical importance of the global circulation, for the success of the explosion, is demonstrated by the fact that similar simulations, carried out with a one-dimensional code, fizzle dramatically. It also appears that the early mixing during the explosion could account for a number of observational features of SN 1987A, such as infrared iron line profiles with extended high-velocity wings, which have so far remained unexplained. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85724. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP HERANT, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 43 TC 204 Z9 208 U1 0 U2 1 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 BP 642 EP 653 DI 10.1086/171685 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH628 UT WOS:A1992JH62800032 ER PT J AU STARK, G SMITH, PL ITO, K YOSHINO, K AF STARK, G SMITH, PL ITO, K YOSHINO, K TI HIGH-RESOLUTION PHOTOABSORPTION CROSS-SECTIONS OF E1-PI-X1-SIGMA+ VIBRATIONAL BANDS OF (CO)-C-12 AND (CO)-C-13 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, MOLECULES; MOLECULAR DATA; TECHNIQUES, SPECTROSCOPIC ID VUV SPECTROSCOPIC FACILITY; CARBON-MONOXIDE; OSCILLATOR-STRENGTHS; RADIATIVE LIFETIMES; INTERSTELLAR CO; 115 NM; PHOTODISSOCIATION; ABSORPTION; TRANSITIONS; MOLECULES AB Photodissociation following absorption of extreme-ultraviolet photons is an important factor in determining the abundance and isotropic fractionation of CO in diffuse and translucent interstellar clouds. The principal channel for destruction of (CO)-C-13 in such clouds begins with absorption in the (1, 0) vibrational band of the E1-PI-X 1-SIGMA+ system; similarly, absorption in the (0, 0) band begins a significant destruction channel for (CO)-C-12. Reliable modeling of the CO fractionation process depends critically upon the accuracy of the photoabsorption cross section for these bands. We have measured the cross sections for the relevant isotropic species and for the (1, 0) band of (CO)-C-12. Our apparatus had a resolving power approximately 20 times larger than those used in previous measurements. Our results, which are uncertain by about 10%, are for the most part larger than previous measurements. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 32 TC 27 Z9 27 U1 0 U2 6 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 BP 705 EP 709 DI 10.1086/171690 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH628 UT WOS:A1992JH62800037 ER PT J AU NARAYAN, R PACZYNSKI, B PIRAN, T AF NARAYAN, R PACZYNSKI, B PIRAN, T TI GAMMA-RAY BURSTS AS THE DEATH THROES OF MASSIVE BINARY STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; BLACK HOLE PHYSICS; GAMMA RAYS, BURSTS; GRAVITATION; MAGNETIC FIELDS; STARS, NEUTRON ID NEUTRON-STARS; ANNIHILATION; LIMIT AB We propose that gamma-ray bursts are created in the mergers of double neutron star binaries and black hole neutron star binaries at cosmological distances. Two different processes provide the electromagnetic energy for the bursts: neutrino-antineutrino annihilation into electron-positron pairs during the merger, and magnetic flares generated by the Parker instability in a postmerger differentially rotating disk. In both cases, an optically thick fireball of size less than or similar to 100 km is initially created, which expands ultrarelativistically to large radii before radiating. The scenario is only qualitative at this time, but it eliminates many previous objections to the cosmological merger model. The strongest bursts should be found close to, but not at the centers of, galaxies at redshifts of order 0.1, and should be accompanied by bursts of gravitational radiation from the spiraling-in binary which could be detected by LIGO. C1 PRINCETON UNIV OBSERV,PRINCETON,NJ 08544. HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL. RP NARAYAN, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. OI Narayan, Ramesh/0000-0002-1919-2730 NR 47 TC 571 Z9 576 U1 0 U2 7 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 BP L83 EP L86 DI 10.1086/186493 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JH629 UT WOS:A1992JH62900007 ER PT J AU PERIVOLAROPOULOS, L AF PERIVOLAROPOULOS, L TI NONTOPOLOGICAL GLOBAL FIELD-DYNAMICS SO PHYSICAL REVIEW D LA English DT Note ID TEXTURE AB We use arguments based on Derrick's theorem to show that the property of collapse, which is the key feature of global texture, appears in several field theory models with broken global O(N) symmetry. Such models do not necessarily have a nontrivial third homotopy group of the vacuum manifold but may give rise to collapsing global field configurations with properties similar to textures. It is verified that configurations with planar and cylindrical geometries do not collapse. The existence of critical parameters for collapse of spherically symmetric global field configurations is verified both analytically and numerically. C1 BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912. RP PERIVOLAROPOULOS, L (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,DIV THEORET ASTROPHYS,MS-51,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Perivolaropoulos, Leandros/0000-0001-9330-2371 NR 9 TC 14 Z9 14 U1 0 U2 0 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 1992 VL 46 IS 4 BP 1858 EP 1862 DI 10.1103/PhysRevD.46.1858 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA JH749 UT WOS:A1992JH74900057 ER PT J AU CHRISTODOULOU, DM KATZ, N RIX, HW HABE, A AF CHRISTODOULOU, DM KATZ, N RIX, HW HABE, A TI DYNAMIC EVOLUTION OF HIGHLY INCLINED RINGS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, EVOLUTION; GALAXIES, KINEMATICS AND DYNAMICS; HYDRODYNAMICS ID PREFERRED ORBIT PLANES; GAS DISKS; TRIAXIAL GALAXIES; POLAR RINGS; S0 GALAXIES; DARK HALO; PROLATE AB We have used three computer programs (two smoothed-particle hydrodynamics codes and one Eulerian hydrodynamics code) to model the detailed dynamical evolution of gaseous rings inside external spheroidal potential wells. In this paper, we discuss rings highly inclined to the equatorial symmetry plane; this is relevant to polar rings observed around galaxies. Our primary objective is to clarify the possible evolution of the rings because, in the past, different numerical techniques have produced entirely different scenarios. We find that the evolution is not affected by the magnitude or type of viscosity but can be strongly dependent on the adopted initial conditions. Our main conclusion is that real polar rings are not expected to collapse into the nuclear region or to settle significantly toward the preferred equatorial orientation within one Hubble time unless the shapes of the surrounding halos are either extremely distorted or distinctly prolate. C1 MIT 6-214, DEPT PHYS, CAMBRIDGE, MA 02139 USA. INST ADV STUDY, SCH NAT SCI, PRINCETON, NJ 08540 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. HOKKAIDO UNIV, DEPT PHYS, SAPPORO, HOKKAIDO 060, JAPAN. RP UNIV ARIZONA, STEWARD OBSERV, TUCSON, AZ 85724 USA. NR 33 TC 21 Z9 21 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 1992 VL 395 IS 1 BP 113 EP 118 DI 10.1086/171634 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JF699 UT WOS:A1992JF69900009 ER PT J AU PELTIER, WR FORTE, AM MITROVICA, JX DZIEWONSKI, AM AF PELTIER, WR FORTE, AM MITROVICA, JX DZIEWONSKI, AM TI EARTHS GRAVITATIONAL-FIELD - SEISMIC TOMOGRAPHY RESOLVES THE ENIGMA OF THE LAURENTIAN ANOMALY SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID DEEP MANTLE VISCOSITY; FLOW AB We demonstrate that the negative free air gravity anomaly over Hudson Bay is not due to glacial isostatic disequilibrium but rather to the influence of large scale mantle convection. C1 HARVARD UNIV,HOFFMAN LAB,DEPT EARTH & PLANETARY SCI,CAMBRIDGE,MA 02138. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP PELTIER, WR (reprint author), UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA. RI Peltier, William/A-1102-2008 NR 18 TC 46 Z9 46 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD AUG 3 PY 1992 VL 19 IS 15 BP 1555 EP 1558 DI 10.1029/92GL01701 PG 4 WC Geosciences, Multidisciplinary SC Geology GA JH144 UT WOS:A1992JH14400007 ER PT J AU PROSCHAN, F AF PROSCHAN, F TI PAINTING AND PERFORMANCE - CHINESE PICTURE RECITATION AND ITS INDIAN GENESIS - MAIR,VH SO AMERICAN ETHNOLOGIST LA English DT Book Review RP PROSCHAN, F (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0094-0496 J9 AM ETHNOL JI Am. Ethnol. PD AUG PY 1992 VL 19 IS 3 BP 598 EP 599 DI 10.1525/ae.1992.19.3.02a00200 PG 2 WC Anthropology SC Anthropology GA JH776 UT WOS:A1992JH77600020 ER PT J AU BILBY, KM AF BILBY, KM TI THE BONI MAROON WARS IN SURINAM - HOOGBERGEN,W SO AMERICAN ETHNOLOGIST LA English DT Book Review RP BILBY, KM (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0094-0496 J9 AM ETHNOL JI Am. Ethnol. PD AUG PY 1992 VL 19 IS 3 BP 630 EP 631 DI 10.1525/ae.1992.19.3.02a00490 PG 2 WC Anthropology SC Anthropology GA JH776 UT WOS:A1992JH77600049 ER PT J AU ROSENBERGER, AL AF ROSENBERGER, AL TI EVOLUTION OF FEEDING NICHES IN NEW-WORLD MONKEYS SO AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY LA English DT Article; Proceedings Paper CT 58TH ANNUAL MEETING OF THE AMERICAN ASSOC OF PHYSICAL ANTHROPOLOGISTS CY APR 07, 1989 CL SAN DIEGO, CA SP AMER ASSOC PHYS ANTHROPOLOGISTS DE PHYLOGENY; FORAGING; ADAPTATION; PLATYRRHINES; DIET; DENTITION; ADAPTIVE RADIATION ID BRAIN STRUCTURE VOLUMES; SURINAM MONKEYS; MOLAR OCCLUSION; FOSSIL RECORD; BEARDED SAKI; INCISOR SIZE; PRIMATES; DIET; ECOLOGY; MORPHOLOGY AB The adaptive radiation of modem New World monkeys unfolded as the major lineages diversified within different dietary-adaptive zones predicated upon a fundamentally frugivorous habit. The broad outlines of this pattern can be seen in the fossil record, beginning in the early Miocene. Cebids are obligate frugivorous predators. The smallest forms (Cebuella, Callithrix) are specialized exudativores, and the largest (cebines) are seasonally flexible omnivores, feeding particularly on insects (Saimiri) or "hard" foods, such as pith and palm nuts (Cebus), when resources are scarce. The smaller-bodied atelids (Callicebus, Aotus) may use insects or leaves opportunistically, but pitheciins (saki-uakaris) specialize on seeds as their major protein source. The larger atelines (Alouatta, Brachyteles) depend on leaves or on ripe fruit (Ateles). Locomotion, body size, and dietary adaptations are linked: claws and small body size opened the canopy-subcanopy niche to callitrichines; climbing and hanging, the fine-branch setting to the atelines; large size and strength, semiprehensile tails, and grasping thumbs, the extractive insectivory of Cebus; deliberate quadrupedalism, the energy-saving transport of folivorous Alouatta. Body size increases and decreases occurred often and in parallel within guilds and lineages. Conventional dietary categories, particularly frugivory, are inadequate for organizing the behavioral and anatomical evidence pertinent to evolutionary adaptation. Related models of morphological evolution based on feeding frequencies tend to obfuscate the selective importance of "critical functions," responses to the biomechanically challenging components of diet that may be determined by a numerically small, or seasonal, dietary fraction. For fossils, body size is an unreliable indicator of diet in the absence of detailed morphological information. More attention needs to be given to developing techniques for identifying and quantifying mechanically significant aspects of dental form, the physical properties of primate foods, their mode of access, and the cycles of availability and nutritional value. C1 UNIV ILLINOIS,DEPT ANTHROPOL,CHICAGO,IL 60680. RP ROSENBERGER, AL (reprint author), SMITHSONIAN INST,DEPT ZOOL RES,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 140 TC 165 Z9 173 U1 6 U2 50 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0002-9483 J9 AM J PHYS ANTHROPOL JI Am. J. Phys. Anthropol. PD AUG PY 1992 VL 88 IS 4 BP 525 EP 562 DI 10.1002/ajpa.1330880408 PG 38 WC Anthropology; Evolutionary Biology SC Anthropology; Evolutionary Biology GA JD592 UT WOS:A1992JD59200007 PM 1503123 ER PT J AU SAYRE, EV YENER, KA JOEL, EC AF SAYRE, EV YENER, KA JOEL, EC TI EVALUATING LEAD ISOTOPE DATA - STATISTICAL EVALUATION OF THE PRESENTLY ACCUMULATED LEAD ISOTOPE DATA FROM ANATOLIA AND SURROUNDING REGIONS - REPLY SO ARCHAEOMETRY LA English DT Note RP SAYRE, EV (reprint author), SMITHSONIAN INST,MUSEUM SUPPORT CTR,CONSERVAT ANALYT LAB,WASHINGTON,DC 20560, USA. NR 5 TC 8 Z9 8 U1 0 U2 0 PU OXFORD UNIV PI OXFORD PA RES LAB ARCHAEOL HIST ART 6 KEBLE RD, OXFORD, ENGLAND OX1 3QJ SN 0003-813X J9 ARCHAEOMETRY JI Archaeometry PD AUG PY 1992 VL 34 BP 330 EP 336 DI 10.1111/j.1475-4754.1992.tb00506.x PN 2 PG 7 WC Archaeology; Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Geosciences, Multidisciplinary SC Archaeology; Chemistry; Geology GA KE659 UT WOS:A1992KE65900020 ER PT J AU GOMEZ, M JONES, BF HARTMANN, L KENYON, SJ STAUFFER, JR HEWETT, R REID, IN AF GOMEZ, M JONES, BF HARTMANN, L KENYON, SJ STAUFFER, JR HEWETT, R REID, IN TI ON THE AGES OF PRE-MAIN-SEQUENCE STARS IN TAURUS SO ASTRONOMICAL JOURNAL LA English DT Article ID AURIGA DARK CLOUDS; LITHIUM ABUNDANCES; PROPER MOTIONS; EMISSION; COMPLEX AB This paper reports a search for pre-main-sequence stars in a region of about 12.7 deg2 near the L1551 complex in the Taurus molecular cloud. We identify only two new pre-main-sequence stars from optical spectra of 383 proper motion candidates on the basis of Li I 6707 angstrom absorption. These stars have ages of approximately 4 X 10(6) yr; we find no evidence for a large number of pre-main-sequence stars with ages comparable to the crossing time of the cloud (approximately 10(7) yr). The T Tauri stars in the southern region of Taurus appear to be older (ages approximately 4 X 10(6) yr) than the stars in the central molecular cloud region (ages approximately 1 X 10(6) yr), suggesting a modest difference in age among molecular complexes in Taurus. The present census of optical pre-main-sequence stars appears to be fairly complete down to V approximately 15.5, and to this magnitude limit there are roughly equal numbers of weak-emission and strong-emission T Tauri stars. The absence of older stars suggests that the Taurus-Auriga molecular cloud may not be very much older than 10(7) yr. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF SANTA CRUZ,LICK OBSERV,SANTA CRUZ,CA 95064. CALTECH,PALOMAR OBSERV,PASADENA,CA 91125. OI Kenyon, Scott/0000-0003-0214-609X NR 28 TC 59 Z9 59 U1 0 U2 0 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 AUG PY 1992 VL 104 IS 2 BP 762 EP 773 DI 10.1086/116272 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JF142 UT WOS:A1992JF14200023 ER PT J AU LATHAM, DW MAZEH, T STEFANIK, RP DAVIS, RJ CARNEY, BW KRYMOLOWSKI, Y LAIRD, JB TORRES, G MORSE, JA AF LATHAM, DW MAZEH, T STEFANIK, RP DAVIS, RJ CARNEY, BW KRYMOLOWSKI, Y LAIRD, JB TORRES, G MORSE, JA TI A SURVEY OF PROPER MOTION STARS .11. ORBITS FOR THE 2ND 40 SPECTROSCOPIC BINARIES SO ASTRONOMICAL JOURNAL LA English DT Article ID RADIAL-VELOCITIES; GLOBULAR-CLUSTERS; TIDAL EVOLUTION; UBV PHOTOMETRY; CLOSE BINARIES; HALO; SUBDWARF; CIRCULARIZATION; METALLICITIES; POPULATION AB We report orbital solutions and spectroscopic metallicities for a second set of 40 spectroscopic binaries found in an extended version of the Carney and Latham survey of proper-motion stars. To investigate the distribution of orbital eccentricity versus period for a pure sample of halo binaries, we select only those systems more metal poor than [m/H] = - 1.6. We find that the transition between circular and eccentric orbits occurs at a period of about 19 days. This supports the interpretation that tidal circularization has been more important on the main sequence than during the pre-main-sequence stage for our sample of old binaries in the halo. C1 TEL AVIV UNIV,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. UNIV N CAROLINA,DEPT PHYS & ASTRON,CHAPEL HILL,NC 27599. BOWLING GREEN STATE UNIV,DEPT PHYS & ASTRON,BOWLING GREEN,OH 43403. NATL UNIV CORDOBA,CORDOBA OBSERV,RA-5000 CORDOBA,ARGENTINA. RP LATHAM, DW (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 62 TC 55 Z9 55 U1 0 U2 0 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 AUG PY 1992 VL 104 IS 2 BP 774 EP 795 DI 10.1086/116273 PG 22 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JF142 UT WOS:A1992JF14200024 ER PT J AU DAVID, LP HUGHES, JP TUCKER, WH AF DAVID, LP HUGHES, JP TUCKER, WH TI SEMIEMPIRICAL LIMITS ON THE THERMAL-CONDUCTIVITY OF INTRACLUSTER GAS SO ASTROPHYSICAL JOURNAL LA English DT Article DE CONDUCTION; COOLING FLOWS; GALAXIES, CLUSTERING; INTERGALACTIC MEDIUM ID LARGE-SCALE STRUCTURE; COLD DARK MATTER; X-RAY; COOLING FLOWS; COMA CLUSTER; HEAT-CONDUCTION; MAGNETIC-FIELDS; HOT PLASMA; GALAXIES; EVOLUTION AB A semiempirical method for establishing lower limits on the thermal conductivity of hot gas in clusters of galaxies is described. The method is based on the observation that the X-ray imaging data (e.g., Einstein IPC) for clusters are well described by the hydrostatic-isothermal beta-model, even for cooling flow clusters beyond about one core radius. In addition, there are strong indications that noncooling flow clusters (like the Coma Cluster) have a large central region (up to several core radii) of nearly constant gas temperature. This suggests that thermal conduction is an effective means of transporting and redistributing the thermal energy of the gas. This in turn has implications for the extent to which magnetic fields in the cluster are effective in reducing the thermal conductivity of the gas. We present time-dependent hydrodynamic simulations for the gas in the Coma Cluster under two separate evolutionary scenarios. One scenario assumes that the cluster potential is static and that the gas has an initial adiabatic distribution. The second scenario uses an evolving cluster potential. These models along with analytic results show that the thermal conductivity of the gas in the Coma Cluster cannot be less than 0.1 of full Spitzer conductivity. These models also show that high gas conductivity assists rather than hinders the development of radiative cooling in the central regions of clusters. C1 UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,SAN DIEGO,CA 92103. RP DAVID, LP (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,SMITHSONIAN ASTROPHYS OBSERV,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 34 TC 19 Z9 19 U1 0 U2 0 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 1992 VL 394 IS 2 BP 452 EP 458 DI 10.1086/171596 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JE712 UT WOS:A1992JE71200007 ER PT J AU MAZEH, T GOLDBERG, D AF MAZEH, T GOLDBERG, D TI ON THE STUDY OF THE MASS RATIO OF SPECTROSCOPIC BINARIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, SPECTROSCOPIC ID SOLAR-TYPE STARS; MULTIPLICITY AB We present a new algorithm to derive the true mass-ratio distribution of an observed sample of spectroscopic binaries. The algorithm includes an iterative procedure in which each binary of unknown inclination is replaced by an ensemble of virtual systems with a distribution of inclinations. This work shows that contrary to a widely held assumption, the inclination angles of each virtual ensemble should not be distributed randomly in space. We also suggest a way to account for the observational selection effect associated with the inability to detect single-line spectroscopic binaries with low-amplitude radial-velocity modulation. We present several numerical simulations which demonstrate the advantage of the new algorithm compared with the classical method to determine binary mass-ratio distribution. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP MAZEH, T (reprint author), TEL AVIV UNIV,SACKLER FAC EXACT SCI,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. NR 26 TC 42 Z9 42 U1 0 U2 0 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 1992 VL 394 IS 2 BP 592 EP 598 DI 10.1086/171611 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JE712 UT WOS:A1992JE71200022 ER PT J AU SOON, WH AF SOON, WH TI ANALYTICAL CROSS-SECTIONS AND RATE COEFFICIENTS FOR H-H INELASTIC-COLLISIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC DATA; ATOMIC PROCESSES ID STATE HYDROGEN-ATOMS; ELECTRON-CAPTURE; NEUTRAL ATOMS; RYDBERG ATOMS; IONIZATION; MOLECULES; H(2S) AB Analytical expressions for cross sections and the corresponding Maxwellian rate coefficients for direct excitation and ionization in binary collisions of hydrogen atoms axe evaluated by using the classical impulse approximation. The maximum values of the ionization and excitation cross sections and the positions of the maxima are also predicted. The classical impulse approximation cross sections were compared with available measurements and quantum-mechanical cross sections. The classical impulse approximation rate coefficients calculated were compared to the commonly used semi-empirical rate coefficients of Drawin. The comparison indicates that the commonly used semi-empirical rate coefficients are significantly higher than the classical impulse approximation rates for excitation and ionization transitions from excited levels. RP SOON, WH (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 38 TC 5 Z9 5 U1 0 U2 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 AUG 1 PY 1992 VL 394 IS 2 BP 717 EP 725 DI 10.1086/171625 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JE712 UT WOS:A1992JE71200036 ER PT J AU CORDOVA, FA KARTJE, JF THOMPSON, RJ MASON, KO PUCHNAREWICZ, EM HARNDEN, FR AF CORDOVA, FA KARTJE, JF THOMPSON, RJ MASON, KO PUCHNAREWICZ, EM HARNDEN, FR TI ACTIVE GALACTIC NUCLEI WITH ULTRASOFT X-RAY-EMISSION SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE GALAXIES, ACTIVE; GALAXIES, NUCLEI; QUASARS, GENERAL; X-RAYS, GALAXIES ID MEDIUM-SENSITIVITY SURVEY; BL LACERTAE OBJECTS; N-LOG-S; SPECTRAL VARIABILITY; GRAVITATIONAL LENS; QUASARS; EXOSAT; LUMINOSITY; ABSORPTION; Q0957+561 AB In the course of selecting ultrasoft X-ray-emitting objects from the data base of the Einstein Observatory, we have found a class of active galactic nuclei with clearly distinguishable soft X-ray components below 0.5 keV. The spectrum of the soft emission corresponds to that of a approximately 10 eV blackbody in the observer's frame of reference. These AGNs have necessarily been detected through equivalent hydrogen column densities that are less than a few times 10(20) cm-2. At least three kinds of AGNs comprise this sample: (1) low-redshift quasars and Seyfert galaxies that have only ultrasoft emission (these objects lack detectable hard X-ray emission); (2) AGNs that have both ultrasoft as well as hard X-ray components (for some of these objects multiple observations exist which suggest that the components are independently variable); and (3) high-redshift quasars whose soft emission may originate, as proposed for the lensed quasar 0957+561, in an extended source or, alternately, in a source that is luminosity-enhanced due to relativistic beaming. C1 UNIV LONDON UNIV COLL,MULLARD SPACE SCI LAB,DORKING,SURREY,ENGLAND. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CHICAGO,CTR ASTRON & ASTROPHYS,CHICAGO,IL 60637. RP CORDOVA, FA (reprint author), PENN STATE UNIV,ASTRON & ASTROPHYS,525 DAVEY LAB,UNIV PK,PA 16802, USA. NR 51 TC 30 Z9 30 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD AUG PY 1992 VL 81 IS 2 BP 661 EP 681 DI 10.1086/191701 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JF437 UT WOS:A1992JF43700002 ER PT J AU GRILLO, F SCIORTINO, S MICELA, G VAIANA, GS HARNDEN, FR AF GRILLO, F SCIORTINO, S MICELA, G VAIANA, GS HARNDEN, FR TI AN EINSTEIN-OBSERVATORY SAO-BASED CATALOG OF B-TYPE STARS SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE CATALOGS; STARS, EARLY-TYPE; X-RAY, STARS ID X-RAY-EMISSION; DRIVEN STELLAR WINDS; O-TYPE STARS; N-LOG-S; SUPER-GIANTS; HOT STARS; INSTABILITIES; SAMPLES; CLUSTER AB Using approximately 4000 X-ray images obtained with the Einstein Observatory Imaging Proportional Counter (IPC), we have measured the 0. 16-4.0 keV emission from 1545 B-type SAO stars falling in the approximately 10% of the sky surveyed with the IPC. We identify 74 detected X-ray sources with B-type stars, estimating that no more than 15 can be misidentified, and present upper limits to the X-ray emission of the remaining stars. In addition to summarizing the X-ray measurements and giving other relevant optical data, our extensive catalog presents a detailed discussion of the reduction process, together with an analysis of selection effects associated with both SAO catalog completeness and IPC target selection procedures. We conclude that X-ray emission, at the level of L(x) greater-than-or-equal-to 1O(30) ergs s-1, is quite common in B stars of early spectral types (B0-B3), regardless of luminosity class, but that emission, at the same level, becomes less common, or nonexistent, in later B-type stars. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP GRILLO, F (reprint author), OSSERV ASTRON PALERMO,PALAZZO NORMANNI 1,I-90134 PALERMO,ITALY. NR 59 TC 69 Z9 69 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD AUG PY 1992 VL 81 IS 2 BP 795 EP 863 DI 10.1086/191705 PG 69 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JF437 UT WOS:A1992JF43700006 ER PT J AU VANBEEK, GW AF VANBEEK, GW TI EXCAVATIONS AT TELL-MICHAL, ISRAEL - HERZOG,Z, RAPP,G, NEGBI,O SO BULLETIN OF THE AMERICAN SCHOOLS OF ORIENTAL RESEARCH LA English DT Book Review RP VANBEEK, GW (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SCHOLARS PRESS PI ATLANTA PA PO BOX 15399, ATLANTA, GA 30333-0399 SN 0003-097X J9 B AM SCH ORIENTAL RE PD AUG PY 1992 IS 287 BP 93 EP 94 DI 10.2307/1357146 PG 2 WC Archaeology; Asian Studies SC Archaeology; Asian Studies GA JW146 UT WOS:A1992JW14600012 ER PT J AU SODHI, NS JAMES, PC WARKENTIN, IG OLIPHANT, LW AF SODHI, NS JAMES, PC WARKENTIN, IG OLIPHANT, LW TI BREEDING ECOLOGY OF URBAN MERLINS (FALCO-COLUMBARIUS) SO CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE LA English DT Article ID REPRODUCTIVE SUCCESS; NEST-DEFENSE; WALES; SPARROWHAWKS; POPULATION; DECLINE AB We studied the breeding ecology of Merlins (Falco columbarius) in Saskatoon, Saskatchewan, Canada, from 1971 to 1990. The nesting population increased from 1 pair in 1971 to a maximum of 31 pairs in 1989. At 25.4 pairs/100 km2, the 1989 nesting density is the highest recorded for this species. The population increased at a rate of 0.165 +/- 0.015, or 17.9%, per year. The growth rate of the population declined, although not significantly, with increasing density. Merlins spaced their nests regularly, with nearest-neighbour distances ranging from 161 to 4669 m. Clutches were initiated between 19 April and 29 May. Earlier clutches had more eggs and produced more young. Weather did not appear to influence the breeding phenology, but fledgling House Sparrows (Passer domesticus, the primary prey) were maximally available when Merlins had their chicks. The reproductive success of this population was one of the highest recorded for this species. In only 4% of the nests did any eggs fail to hatch. The mean and modal clutch sizes were 4.2 +/- 0.04 (SE) and 5, respectively, and mean and modal brood sizes were 3.8 +/- 0.03 and 5, respectively. We did not observe any significant effect of nesting density on either clutch or brood size. Males delivered most of the food and were most active in nest defence against corvids, while females primarily incubated, brooded, and fed the nestlings. This expanding Merlin population had higher and more consistent reproductive rates than other populations. C1 UNIV SASKATCHEWAN,DEPT BIOL,SASKATOON S7N 0W0,SASKATCHEWAN,CANADA. SASKATCHEWAN MUSEUM NAT HIST,REGINA S4P 3V7,SASKATCHEWAN,CANADA. SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. UNIV SASKATCHEWAN,WESTERN COLL VET MED,DEPT VET ANAT,SASKATOON S7N 0W0,SASKATCHEWAN,CANADA. NR 65 TC 29 Z9 29 U1 2 U2 12 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4301 J9 CAN J ZOOL JI Can. J. Zool.-Rev. Can. Zool. PD AUG PY 1992 VL 70 IS 8 BP 1477 EP 1483 DI 10.1139/z92-204 PG 7 WC Zoology SC Zoology GA JP720 UT WOS:A1992JP72000002 ER PT J AU BONESS, DJ BOWEN, D IVERSON, SJ OFTEDAL, OT AF BONESS, DJ BOWEN, D IVERSON, SJ OFTEDAL, OT TI INFLUENCE OF STORMS AND MATERNAL SIZE ON MOTHER-PUP SEPARATIONS AND FOSTERING IN THE HARBOR SEAL, PHOCA-VITULINA SO CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE LA English DT Note ID LARUS-ARGENTATUS; HERRING GULL; ADOPTION; BEHAVIOR AB Fostering behavior has been documented in a large number of mammals and birds, but its frequency of occurrence and proximate causes are poorly understood in most species. Ten percent of a sample of 76 paint-marked female harbor seals (Phoca vitulina) fostered pups for some portion of the lactation period. Fostering appears to be associated with females having lost their own pup. In a subsample of 30 pairs that were followed closely, 3 of 16 females that lost their pups fostered, but none of 14 females that maintained continuous association with their pups throughout lactation did so. Smaller, and presumably younger, females were significantly more likely to become separated from their pups than were larger, and presumably older, females (73 vs. 33 %). A high proportion (68 %) of 35 separations observed occurred during the same day as, or within 1 day following, a storm. In 7 of 8 instances where we relocated pups after they were separated from their mothers during a storm, we found them in the direction of the surface current, 4.9 km from their previous location, on average. These data suggest that storms were the primary cause of separation of harbor seal mothers from their pups, and that younger mothers may be more likely to become separated from their pups. As fostering only occurs after a mother has lost her pup, we suggest that fostering, too, may be more likely among younger females. C1 FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,DIV MARINE FISH,DARTMOUTH B2Y 4A2,NS,CANADA. GEORGETOWN UNIV,MED CTR,DEPT PHYSIOL & BIOPHYS,WASHINGTON,DC 20009. RP BONESS, DJ (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008, USA. NR 29 TC 33 Z9 33 U1 0 U2 8 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4301 J9 CAN J ZOOL JI Can. J. Zool.-Rev. Can. Zool. PD AUG PY 1992 VL 70 IS 8 BP 1640 EP 1644 DI 10.1139/z92-228 PG 5 WC Zoology SC Zoology GA JP720 UT WOS:A1992JP72000026 ER PT J AU FLEISCHER, RC SMITH, NG AF FLEISCHER, RC SMITH, NG TI GIANT COWBIRD EGGS IN THE NESTS OF 2 ICTERID HOSTS - THE USE OF MORPHOLOGY AND ELECTROPHORETIC VARIANTS TO IDENTIFY INDIVIDUALS AND SPECIES SO CONDOR LA English DT Article DE GIANT COWBIRD; SCAPHIDURA-ORYZIVORA; CACICUS-CELA; ZARHYNCHUS-WAGLERI; BROOD PARASITISM; EGG MIMICRY; PROTEIN ELECTROPHORESIS ID AVIAN BROOD PARASITISM; DISCRIMINATION; COEVOLUTION AB The Giant Cowbird (Scaphidura oryzivora) is a brood parasite of several icterid hosts in Central and South America. Cowbird eggs can visually resemble those of their hosts. Evidence of egg mimicry requires quantification of the degree of similarity of host and parasite eggs. It is also unclear if nests found with more than one cowbird egg were parasitized by more than one female cowbird. We used electrophoresis of egg proteins and egg morphometric analyses to discriminate among the eggs of two host species (Cacicus cela and Zarhynchus wagleri) and those of the parasite, and to document the number of females that laid in a single host nest. Electromorphs of transferrin differed between the hosts ("a" alleles only) and the parasite ("b" and "c" alleles only), and thus serve as a species-specific marker. Multivariate assessment of egg measurements and markings indicate significant and non-overlapping differences in morphology between eggs of the three species as well. Electromorph and color morph differences showed that two or more female cowbirds definitely laid in six of 10 nests containing two or more cowbird eggs. In the other four nests, paired cowbird eggs could not be differentiated by color or electromorph and may have been laid by the same female. RP FLEISCHER, RC (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 21 TC 10 Z9 10 U1 1 U2 4 PU COOPER ORNITHOLOGICAL SOC PI LAWRENCE PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 SN 0010-5422 J9 CONDOR JI Condor PD AUG PY 1992 VL 94 IS 3 BP 572 EP 578 DI 10.2307/1369241 PG 7 WC Ornithology SC Zoology GA JL437 UT WOS:A1992JL43700002 ER PT J AU CHIU, SSL CHEUNG, ASC FINCH, M JAMIESON, MJ YOSHINO, K DALGARNO, A PARKINSON, WH AF CHIU, SSL CHEUNG, ASC FINCH, M JAMIESON, MJ YOSHINO, K DALGARNO, A PARKINSON, WH TI PREDISSOCIATION OF OXYGEN IN THE B3-SIGMA-U-STATE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SCHUMANN-RUNGE BANDS; REGION 175-205 NM; ABSORPTION-BANDS; SPECTROSCOPIC CONSTANTS; O-16 O-18; B-STATE; O2; LINEWIDTHS AB The predissociation linewidths and level shifts of vibrational levels of three oxygen isotopic molecules O-16(2), (OO)-O-16-O-18, and O-18(2) arising from the interactions of the B (3)SIGMA(u)- state with the four repulsive states (5)PI(u), (3)SIGMA(u)+, (3)PI(u), and (1)PI(u) been calculated. A set of parameters characterizing these interactions has been determined. Good agreement between calculated and experimental predissociation widths and shifts has been obtained for all the three isotopic molecules. C1 UNIV GLASGOW,DEPT COMP SCI,GLASGOW G12 8QQ,SCOTLAND. UNIV HONG KONG,DEPT CHEM,HONG KONG,HONG KONG. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 29 TC 25 Z9 25 U1 2 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1992 VL 97 IS 3 BP 1787 EP 1792 DI 10.1063/1.463165 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA JE891 UT WOS:A1992JE89100018 ER PT J AU FERRARI, FD AF FERRARI, FD TI DEVELOPMENT OF COPEPOD SWIMMING LEGS WITH UNEQUAL NUMBERS OF RAMAL SEGMENTS SO JOURNAL OF CRUSTACEAN BIOLOGY LA English DT Article ID CALANOIDA AB Several different developmental patterns are responsible for inequalities in numbers of segments on the exopod and endopod of the same swimming leg of adult copepods. These patterns result from changes in two basic kinds of segment additions: (1) changes early in leg development of calanoids result in a leg whose endopod has fewer segments than its exopod, and in a leg whose exopod has fewer segments than its endopod in harpacticoids; (2) changes late in leg development in harpacticoids result in a leg whose endopod has fewer segments than its exopod. RP FERRARI, FD (reprint author), SMITHSONIAN INST,SMITHSONIAN OCEANOG SORTING CTR,WASHINGTON,DC 20560, USA. NR 14 TC 6 Z9 6 U1 0 U2 0 PU CRUSTACEAN SOC PI SAN ANTONIO PA 840 EAST MULBERRY, SAN ANTONIO, TX 78212 SN 0278-0372 J9 J CRUSTACEAN BIOL JI J. Crustac. Biol. PD AUG PY 1992 VL 12 IS 3 BP 392 EP 396 DI 10.2307/1549033 PG 5 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA JG952 UT WOS:A1992JG95200008 ER PT J AU KLASSEN, GJ AF KLASSEN, GJ TI COEVOLUTION - A HISTORY OF THE MACROEVOLUTIONARY APPROACH TO STUDYING HOST-PARASITE ASSOCIATIONS SO JOURNAL OF PARASITOLOGY LA English DT Article; Proceedings Paper CT VONIHERING CENTENARY SYMP ON PARASITE BIOGEOGRAPHY AND COEVOLUTION, AT THE 1991 ANNUAL MEETING OF THE AMERICAN SOC OF PARASITOLOGISTS CY AUG, 1991 CL MADISON, WI SP AMER SOC PARASITOLOGISTS ID MONOGENEA; BIOGEOGRAPHY; EVOLUTION AB The year 1991 marked 100 yr of coevolution research. I have reviewed the first 90 yr of this history. Three chronological phases are apparent: recognition of predictable associations among hosts and their parasites; search for patterns of association and their underlying causes, emphasizing either correlated biogeographic patterns or correlated phylogenies; and development of objective and repeatable methodologies for reconstructing and interpreting these patterns of association. Von Ihering, an outspoken anti-Darwinian, was undoubtedly the first to recognize and make use of predictable host-parasite associations. Kellogg and Fahrenholz, however, had more profound influence on subsequent generations, but in different directions. Kellogg attempted to meld natural selection with speciation by isolation, He also considered host specificity a component of coevolution, important but variable. His work laid the foundation for future research concentrated on biogeographic interpretations of host-parasite relationships. This emphasis and Metcalf's failed attempts to provide adequate mechanisms for reconstructing phylogenies reduced the biogeographic approach to an empirical research program in the hands of Manter. Fahrenholz, on the other hand, exposed to a strong anti-Darwinian sentiment, emphasized the importance of strict host specificity. This led to Eichler's formulation of the first 3 coevolutionary rules and the conclusion that host specificity was not a component but the cause of coevolution and ultimately the tautology inherent in the phylogenetic approach. All had to rely on 1 assumption, that host and parasite phylogenies were reflected in the taxonomic hierarchy. Hennig criticized this assumption and provided a method whereby phylogenies are reconstructed independently. Brooks melded this new phylogenetic method (cladistics) with an equally new biogeographic method (vicariance biogeography), providing the foundations for the modem macroevolutionary approach to studying host-parasite associations. C1 ROYAL ONTARIO MUSEUM,DEPT ICHTHYOL & HERPETOL,TORONTO M5S 2C6,ONTARIO,CANADA. UNIV TORONTO,DEPT ZOOL,TORONTO M5S 2C6,ON,CANADA. RP KLASSEN, GJ (reprint author), SMITHSONIAN INST,DIV FISHERIES,WASHINGTON,DC 20560, USA. NR 90 TC 67 Z9 71 U1 3 U2 17 PU AMER SOC PARASITOLOGISTS PI LAWRENCE PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 SN 0022-3395 J9 J PARASITOL JI J. Parasitol. PD AUG PY 1992 VL 78 IS 4 BP 573 EP 587 DI 10.2307/3283532 PG 15 WC Parasitology SC Parasitology GA KU087 UT WOS:A1992KU08700002 PM 1635016 ER PT J AU EGGLESTON, DB LIPCIUS, RN HINES, AH AF EGGLESTON, DB LIPCIUS, RN HINES, AH TI DENSITY-DEPENDENT PREDATION BY BLUE CRABS UPON INFAUNAL CLAM SPECIES WITH CONTRASTING DISTRIBUTION AND ABUNDANCE PATTERNS SO MARINE ECOLOGY PROGRESS SERIES LA English DT Article ID CALLINECTES-SAPIDUS RATHBUN; VARIABLE FUNCTIONAL-RESPONSES; LONG-TERM VARIATION; CHESAPEAKE BAY; CRASSOSTREA-VIRGINICA; JUVENILE OYSTERS; MARINE PREDATOR; PREY DENSITY; SIZE; MACROBENTHOS AB Adult infaunal clams (Macoma balthica) persist at low densities in sandy and muddy habitats in Chesapeake Bay, USA, despite intense predation by blue crabs Callinectes sapidus; another infaunal soft-shelled clam (Mya arenaria) only persists in sandy habitats. We hypothesized that the persistence of M. balthica and M. arenaria in certain habitats was due to blue crabs exhibiting a type III (sigmoid) functional response whereby the risk of mortality is reduced at low clam densities. Laboratory experiments assessed functional responses (prey consumption predator-1 as a function of prey density) of large male blue crabs to 6 densities of M. balthica as a function of sediment type (sand and mud) and tank size (54.6 cm and 97.2 cm diameter). These results were compared with previous experiments with M. arenaria. Abundances of blue crabs, M. balthica, and M. arenaria were measured 4 to 10 times yr-1 from 1979 to 1986 at both sand and mud stations in the mesohaline zone of Chesapeake Bay. Laboratory functional response results were then related to seasonal habitat-specific abundance patterns of M. balthica and M. arenaria in the field. With the exception of M. balthica in mud, abundances of M. arenaria and M. balthica decreased as blue crab abundance increased during the summer. When blue crabs reached their peak abundances in July, M. balthica was predominant in mud whereas M. arenaria numbers dropped to zero in mud and persisted in sand at similar low densities to M. balthica in sand. In the laboratory, blue crabs exhibited density-dependent (type III) functional responses to M. balthica irrespective of sediment type and tank size, even though mortality rates of clams were significantly higher in sand than mud. Differences in habitat-specific burial depth probably accounted for the differential survival of M. balthica in sand and mud. Thus, M. balthica obtained a relative refuge from blue crab predation at low densities similar to those in the field near the end of the seasonal period of active predation. Previous laboratory experiments with blue crabs indicated a type III functional response to M. arenaria in sand and an inversely density-dependent type II response to M. arenaria in mud. Thus, the collective laboratory and field evidence from this study and others strongly suggests that blue crabs are critical determinants of species- and habitat-specific prey persistence in marine soft-bottom communities, and that analysis of predator functional and aggregative responses may help to explain much of the spatial variation of clam abundance patterns in the mesohaline zone of Chesapeake Bay. C1 COLL WILLIAM & MARY, SCH MARINE SCI, VIRGINIA INST MARINE SCI, GLOUCESTER POINT, VA 23062 USA. SMITHSONIAN ENVIRONM RES CTR, EDGEWATER, MD 21037 USA. RI Ross, Donald/F-7607-2012 OI Ross, Donald/0000-0002-8659-3833 NR 54 TC 118 Z9 119 U1 1 U2 17 PU INTER-RESEARCH PI OLDENDORF LUHE PA NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY SN 0171-8630 J9 MAR ECOL PROG SER JI Mar. Ecol.-Prog. Ser. PD AUG PY 1992 VL 85 IS 1-2 BP 55 EP 68 DI 10.3354/meps085055 PG 14 WC Ecology; Marine & Freshwater Biology; Oceanography SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Oceanography GA JP184 UT WOS:A1992JP18400005 ER PT J AU DOLAN, JR GALLEGOS, CC AF DOLAN, JR GALLEGOS, CC TI TROPHIC ROLE OF PLANKTONIC ROTIFERS IN THE RHODE RIVER ESTUARY, SPRING SUMMER 1991 SO MARINE ECOLOGY PROGRESS SERIES LA English DT Article ID BRACHIONUS-PLICATILIS; FOOD CONCENTRATION; BALTIC SEA; MICROZOOPLANKTON; ZOOPLANKTON; DYNAMICS; REPRODUCTION; PREDATION; RATES; FJORD AB Rotifers were abundant (average ca 1000 ind. l-1) from March through September 1991 in a shallow, eutrophic subestuary of the Chesapeake Bay (USA). The rotifer community was usually dominated by Synchaeta cecilia with Brachionus plicatilis as the second most common species. Rotifer concentrations were negatively related to microflagellate abundances. However, reproductive output of S. cecilia, as measured by eggs female-1 or egg ratio (ER) followed temporal trends in microflagellate numbers. An inverse relationship between rotifers and herbivorous ciliates, which were dominated by a heterotrophic Strombidium sp., was apparent late spring through mid-summer, corresponding to a period of parallel abundance trends of auto- and heterotrophic microflagellates. Field experiments with natural plankton populations examining the removal of rotifers by copepods and sea nettles yielded clearance rate estimates of ca 50 ml copepod-1 d-1 and 20 l sea nettle-1 d-1. Calculations of predator removal rates and observations of shifts in ER with microflagellate concentration suggest that rotifer production is more likely food- than predator-limited in the Rhode River. Rotifer production figures, based on growth rates from ER data and grazing experiments, averaged ca 18-mu-g C l-1 d-1, exceeding previous estimates of copepod production by an order of magnitude. C1 SMITHSONIAN ENVIRONM RES CTR, EDGEWATER, MD 21037 USA. RI Dolan, John/A-4513-2009 OI Dolan, John/0000-0002-9454-1355 NR 81 TC 28 Z9 30 U1 0 U2 5 PU INTER-RESEARCH PI OLDENDORF LUHE PA NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY SN 0171-8630 J9 MAR ECOL PROG SER JI Mar. Ecol.-Prog. Ser. PD AUG PY 1992 VL 85 IS 1-2 BP 187 EP 199 DI 10.3354/meps085187 PG 13 WC Ecology; Marine & Freshwater Biology; Oceanography SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Oceanography GA JP184 UT WOS:A1992JP18400016 ER PT J AU WINTER, K ZOTZ, G BAUR, B DIETZ, KJ AF WINTER, K ZOTZ, G BAUR, B DIETZ, KJ TI LIGHT AND DARK CO2 FIXATION IN CLUSIA-UVITANA AND THE EFFECTS OF PLANT WATER STATUS AND CO2 AVAILABILITY SO OECOLOGIA LA English DT Article DE CHLOROPHYLL FLUORESCENCE; CLUSIA; CRASSULACEAN ACID METABOLISM; PHOSPHOENOLPYRUVATE CARBOXYLASE ID CRASSULACEAN-ACID-METABOLISM; MESEMBRYANTHEMUM-CRYSTALLINUM; CHLOROPHYLL FLUORESCENCE; GAS-EXCHANGE; LEAVES; IRRADIANCE; COMPONENTS; PROTEINS; YIELD; ROSEA AB In well-watered plants of Clusia uvitana, a species capable of carbon fixation by crassulacean acid metabolism (CAM), recently expanded leaves gained 5 to 13-fold more carbon during 12 h light than during 12 h dark periods. When water was withheld from the plants, daytime net CO2 uptake strongly decreased over a period of several days, whereas there was a marked increase in nocturnal carbon gain. Photosynthetic rates in the chloroplasts were hardly affected by the water stress treatment, as demonstrated by measurements of chlorophyll a fluorescence of intact leaves, indicating efficient decarboxylation of organic acids and refixation of carbon in the light. Within a few days after rewatering, plants reverted to the original gas exchange pattern with net CO2 uptake predominantly occurring during daytime. The reversible increase in dark CO2 fixation was paralleled by a reversible increase in the content of phosphoenolpyruvate (PEP) carboxylase protein. In well-watered plants, short-term changes in the degree of dark CO2 fixation were induced by alterations in CO2 partial pressure during light periods: a decrease from 350 to 170-mu-bar CO2 caused nocturnal carbon gain, measured in normal air (350-mu-bar), to increase, whereas an increase to 700-mu-bar CO2, during the day, caused net dark CO2 fixation to cease. The increased CAM activity in response to water shortage may, at least to some extent, be directly related to the reduced carbon gain during daytime. C1 JULIUS VON SACHS INST BIOWISSENSCH,W-8700 WURZBURG,GERMANY. RP WINTER, K (reprint author), SMITHSONIAN TROP RES INST,APDO 2072,BALBOA,PANAMA. RI Dietz, Karl-Josef/B-6029-2009 NR 23 TC 54 Z9 54 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD AUG PY 1992 VL 91 IS 1 BP 47 EP 51 PG 5 WC Ecology SC Environmental Sciences & Ecology GA JG187 UT WOS:A1992JG18700007 PM 28313372 ER PT J AU ADLER, GH TELFORD, SR WILSON, ML SPIELMAN, A AF ADLER, GH TELFORD, SR WILSON, ML SPIELMAN, A TI VEGETATION STRUCTURE INFLUENCES THE BURDEN OF IMMATURE IXODES-DAMMINI ON ITS MAIN HOST, PEROMYSCUS-LEUCOPUS SO PARASITOLOGY LA English DT Article DE IXODES-DAMMINI; PEROMYSCUS-LEUCOPUS; VEGETATION STRUCTURE; LYME DISEASE ID LYME-DISEASE; IXODIDAE; ACARI; DEER; DEMOGRAPHY AB To determine whether the relative abundance of immature Ixodes dammini (the vector of Lyme disease and human babesiosis) is related to habitat structure, we examined tick burdens on their main host, the white-footed mouse (Peromyscus leucopus), in 4 structurally diverse sites on Great Island, Massachusetts, USA. Vegetation structure at each site was quantified with respect to 25 habitat variables. Principal components analysis was used to reduce this set of habitat variables to seven new and orthogonal variables. Immature tick abundance varied widely among grids. Regression analysis of tick burdens on the habitat principal components showed that larval burdens were related strongly to the density of woody vegetation and negatively to herbaceous vegetation. Nymphal burdens were related negatively to herbaceous vegetation, but the relationship was not as strong as in the case of larvae. An experimental reduction in the abundance of white-tailed deer (Odocoileus virginianus), the main host of adult ticks, substantially reduced tick burdens and altered their relationships to habitat structure. Nymphal burdens were unrelated to habitat structure following deer removal. Manipulating habitat structure may have utility as a control strategy against this important vector. C1 HARVARD UNIV,SCH PUBL HLTH,DEPT TROP PUBL HLTH,665 HUNTINGTON AVE,BOSTON,MA 02115. HARVARD UNIV,SCH PUBL HLTH,DEPT POPULAT SCI,BOSTON,MA 02115. YALE UNIV,ARBOVIRUS RES UNIT,NEW HAVEN,CT 06510. SMITHSONIAN TROP RES INST,UNIT 0948,AA,APO,MIAMI,FL 34002. FU NIAID NIH HHS [AI-19693] NR 22 TC 41 Z9 42 U1 3 U2 17 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0031-1820 J9 PARASITOLOGY JI Parasitology PD AUG PY 1992 VL 105 BP 105 EP 110 PN 1 PG 6 WC Parasitology SC Parasitology GA JH970 UT WOS:A1992JH97000014 PM 1437266 ER PT J AU WHITNEY, CA AF WHITNEY, CA TI THE STARRY NIGHT ILLUMINATED SO PHYSICS TODAY LA English DT Letter RP WHITNEY, CA (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 5 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD AUG PY 1992 VL 45 IS 8 BP 13 EP 13 DI 10.1063/1.2809764 PN 1 PG 1 WC Physics, Multidisciplinary SC Physics GA JH095 UT WOS:A1992JH09500006 ER PT J AU Bult, C Kallersjo, M Suh, Y AF Bult, Carol Kaellersjoe, Mari Suh, Youngbae TI Amplification and Sequencing of 16/18S rDNA from Gel-Purified Total Plant DNA SO PLANT MOLECULAR BIOLOGY REPORTER LA English DT Article DE DNA extraction; gel purification; PCR amplification; double-stranded DNA sequencing; rDNA; nuclear; chloroplast AB We describe here methods and strategies for amplifying and sequencing the genes encoding the small subunits (16/18S) of nuclear and chloroplast ribosomal DNA (rDNA) from total plant DNA. These methods were developed in response to technical difficulties we encountered in our molecular systematic work with members of various plant families. These protocols have proved useful when the amount of tissue available for study is limited and when the tissues have high concentrations of undesirable secondary metabolites which are often co-isolated with nucleic acids. C1 [Bult, Carol; Kaellersjoe, Mari; Suh, Youngbae] Natl Museum Nat Hist, Smithsonian Inst, Lab Mol Systemat, Washington, DC 20560 USA. RP Bult, C (reprint author), Natl Museum Nat Hist, Smithsonian Inst, Lab Mol Systemat, Washington, DC 20560 USA. FU Swedish Natural Science Research Council; NSF [DEB-BSR-8615212]; LEQSF [86-LBR-(048)-08] FX Financial support was provided for M. Kallersjo by a postdoctoral grant from the Swedish Natural Science Research Council. This work was supported in part by NSF# DEB-BSR-8615212 and LEQSF contract 86-LBR-(048)-08 to Elizabeth A. Zimmer. NR 7 TC 44 Z9 45 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0735-9640 J9 PLANT MOL BIOL REP JI Plant Mol. Biol. Rep. PD AUG PY 1992 VL 10 IS 3 BP 273 EP 284 DI 10.1007/BF02668360 PG 12 WC Biochemical Research Methods; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA V23IE UT WOS:000208335700006 ER PT J AU XU, ZR NICOLSON, DH AF XU, ZR NICOLSON, DH TI DONT ABBREVIATE CHINESE NAMES SO TAXON LA English DT Article AB Westerners have thousands of different family names but only a few hundred common given names. Thus, in a western personal name, the family name is discriminative and abbreviating the undiscriminative given name(s) makes sense. Chinese have only a few hundred common family names but thousands of given names. Western conventions of abbreviating given names are therefore inappropriate for Chinese personal names. Different traditions of "western" and Chinese personal nomenclature are discussed, and suggestions are made on how to handle Chinese names in a western bibliographic context. C1 SMITHSONIAN INST,DEPT BOT NHB166,WASHINGTON,DC 20560. RP XU, ZR (reprint author), UNIV ALABAMA,DEPT BIOL SCI,319 BIOL,BOX 870344,TUSCALOOSA,AL 35487, USA. NR 9 TC 4 Z9 5 U1 0 U2 2 PU INT ASSN PLANT TAXONOMY PI BERLIN PA BOTANISCHER GARTEN & MUSEUM KONIGIN-LUISSE-STRASSE 6-8, W-1000 BERLIN, GERMANY SN 0040-0262 J9 TAXON JI Taxon PD AUG PY 1992 VL 41 IS 3 BP 499 EP 504 DI 10.2307/1222820 PG 6 WC Plant Sciences; Evolutionary Biology SC Plant Sciences; Evolutionary Biology GA JK741 UT WOS:A1992JK74100008 ER PT J AU MOLLOY, BPJ BRUMMITT, RK SHORT, PS BRETELER, FJ AF MOLLOY, BPJ BRUMMITT, RK SHORT, PS BRETELER, FJ TI WHAT IS A SPECIMEN SO TAXON LA English DT Article AB There is some ambiguity in what is meant by the word "specimen" in the International code of botanical nomenclature. Some cases are discussed and the need for amending the Code, as well as adding certain examples, is considered. C1 DSIR LAND RESOURCES,INST BOT,CHRISTCHURCH,NEW ZEALAND. ROYAL BOT GARDENS,HERBARIUM,RICHMOND TW9 3AE,SURREY,ENGLAND. AGR UNIV WAGENINGEN,DEPT PLANT TAXON,6700 ED WAGENINGEN,NETHERLANDS. NATL HERBARIUM VICTORIA,S YARRA,VIC 3141,AUSTRALIA. RP MOLLOY, BPJ (reprint author), SMITHSONIAN INST,DEPT BOT,NHB-166,WASHINGTON,DC 20560, USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU INT ASSN PLANT TAXONOMY PI BERLIN PA BOTANISCHER GARTEN & MUSEUM KONIGIN-LUISSE-STRASSE 6-8, W-1000 BERLIN, GERMANY SN 0040-0262 J9 TAXON JI Taxon PD AUG PY 1992 VL 41 IS 3 BP 505 EP 507 DI 10.2307/1222821 PG 3 WC Plant Sciences; Evolutionary Biology SC Plant Sciences; Evolutionary Biology GA JK741 UT WOS:A1992JK74100009 ER PT J AU WERTH, CR LELLINGER, DB AF WERTH, CR LELLINGER, DB TI GENOMICALLY PRESERVED PLANTS AND THEIR NOMENCLATURE SO TAXON LA English DT Article ID ELECTROPHORETIC EVIDENCE; HOMOSPOROUS FERN; NORTH-AMERICAN; DRYOPTERIS; EVOLUTION; COMPLEX; GENOME; ALLOPOLYPLOIDY; CYSTOPTERIS; POLYPODIUM AB Species that hybridize to form allopolyploids may become extinct, yet may be discovered and characterized through the continued existence and expression of their genomes in their allopolyploid descendants. For purposes of nomenclature, these genomically preserved plants (GPPs) form a third category of plants, along with recent plants and fossils, with which they share certain kinds of characters. GPPs are essential to understanding the phylogeny of some species complexes and can be included as OTUs in phenetic and phylogenetic analyses. A means to provide for the naming, description, and typification of taxa of genomically preserved plants needs to be included in the International code of botanical nomenclature. C1 SMITHSONIAN INST,DEPT BOT MRC166,WASHINGTON,DC 20560. RP WERTH, CR (reprint author), TEXAS TECH UNIV,DEPT BIOL SCI,LUBBOCK,TX 79409, USA. NR 50 TC 10 Z9 10 U1 0 U2 0 PU INT ASSN PLANT TAXONOMY PI BERLIN PA BOTANISCHER GARTEN & MUSEUM KONIGIN-LUISSE-STRASSE 6-8, W-1000 BERLIN, GERMANY SN 0040-0262 J9 TAXON JI Taxon PD AUG PY 1992 VL 41 IS 3 BP 513 EP 521 DI 10.2307/1222823 PG 9 WC Plant Sciences; Evolutionary Biology SC Plant Sciences; Evolutionary Biology GA JK741 UT WOS:A1992JK74100011 ER PT J AU WRIGHT, SJ AF WRIGHT, SJ TI SEASONAL DROUGHT, SOIL FERTILITY AND THE SPECIES DENSITY OF TROPICAL FOREST PLANT-COMMUNITIES SO TRENDS IN ECOLOGY & EVOLUTION LA English DT Review ID TREEFALL GAPS; RAIN-FORESTS; MOIST FOREST; UNDERSTORY; DIVERSITY; RICHNESS; RAINFOREST; PHENOLOGY; SHRUBS; HERBS AB Recent comparisons of plant species densities in tropical forest make it possible to evaluate factors that govern species richness. Contrary to earlier predictions, plant species densities are not greater on soils of relatively low fertility. In fact, the opposite trend is often observed, although the relationship between species densities and soil fertility is highly variable. However, tropical forest plant species densities consistently increase with rainfall. Species coexistence in wetter tropical forests may be facilitated by the absence of competition for moisture combined with year-round pest pressure and low understory light levels, which reduce growth rates and the potential for competition for other resources. RP WRIGHT, SJ (reprint author), SMITHSONIAN TROP RES INST,APARTADO 2072,BALBOA,PANAMA. RI Wright, Stuart/M-3311-2013 OI Wright, Stuart/0000-0003-4260-5676 NR 37 TC 95 Z9 106 U1 4 U2 34 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0169-5347 J9 TRENDS ECOL EVOL JI Trends Ecol. Evol. PD AUG PY 1992 VL 7 IS 8 BP 260 EP 263 DI 10.1016/0169-5347(92)90171-7 PG 4 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA JE960 UT WOS:A1992JE96000006 PM 21236025 ER PT J AU DRAKE, BG AF DRAKE, BG TI THE IMPACT OF RISING CO2 ON ECOSYSTEM PRODUCTION SO WATER AIR AND SOIL POLLUTION LA English DT Article ID ELEVATED ATMOSPHERIC CO2; CARBON-DIOXIDE ENRICHMENT; LONG-TERM EXPOSURE; SOYBEAN LEAVES; PHOTOSYNTHETIC INHIBITION; TRANSPIRATION RESPONSES; STOMATAL CONDUCTANCE; TUSSOCK TUNDRA; ABSCISIC-ACID; GAS-EXCHANGE AB A fundamental property of green plants is that the rate of photosynthesis is dependent in the ambient CO2 concentration. There is overwhelming experimental evidence that this effect increases plant production in most C3 Plants: hundreds of experiments with many species show that plant growth increases an average 30% to 40% for a doubling of the present normal ambient CO2 concentration (Kimball, 1986). External environmental factors, such as temperature and the availability of nutrients, modify this response. The greatest stimulation of photosynthesis and growth can be expected to occur at high temperatures and much smaller responses at low temperature. Factors which restrict growth, such as low nutrients, will reduce but usually do not eliminate the stimulation of production with increasing CO2 even when nitrogen is severly limiting. There are also reports of direct effects of ambient CO2 concentration on dark respiration which show that there is an immediate reduction in the rate of CO2 efflux or O2 consumption when the CO2 around plant tissues is increased. There have been very few long-term field studies of the effects of increased CO2 on whole plants and ecosystem processes but the data from these studies are consistent in showing an increase in plant production with an increase in CO2 concentration of the ambient air. RP DRAKE, BG (reprint author), SMITHSONIAN ENVIRONM RES CTR, POB 28, EDGEWATER, MD 21037 USA. NR 85 TC 29 Z9 29 U1 1 U2 13 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0049-6979 J9 WATER AIR SOIL POLL JI Water Air Soil Pollut. PD AUG PY 1992 VL 64 IS 1-2 BP 25 EP 44 DI 10.1007/BF00477094 PG 20 WC Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences; Water Resources GA JA715 UT WOS:A1992JA71500005 ER PT J AU GINGERICH, O AF GINGERICH, O TI SPACE, TIME AND MAN - A PREHISTORIANS VIEW - CLARK,G SO NATURE LA English DT Book Review RP GINGERICH, O (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JUL 30 PY 1992 VL 358 IS 6385 BP 381 EP 382 DI 10.1038/358381a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JF853 UT WOS:A1992JF85300042 ER PT J AU VANCURA, O BLAIR, WP LONG, KS RAYMOND, JC AF VANCURA, O BLAIR, WP LONG, KS RAYMOND, JC TI A MULTIWAVELENGTH STUDY OF THE SUPERNOVA REMNANT N49 IN THE LARGE MAGELLANIC CLOUD SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, INDIVIDUAL (N49); ISM, STRUCTURE; MAGELLANIC CLOUDS; SHOCK WAVES; SUPERNOVA REMNANTS; ULTRAVIOLET, SPECTRA ID LOW-DENSITY PLASMA; H-II REGIONS; NOVA REMNANTS; CYGNUS LOOP; X-RAY; OPTICAL-EMISSION; SHOCK-WAVES; ABUNDANCE GRADIENTS; INTERSTELLAR-MEDIUM; EXTINCTION AB Using the 2.5 m du Pont telescope at Las Campanas, the International Ultraviolet Explorer satellite, and archival high-resolution imager X-ray data from the Einstein Observatory, we present a detailed imaging and spectroscopic study of the supernova remnant (SNR) N49 in the Large Magellanic Cloud. Although the X-ray and optical morphology of N49 are similar in the sense that the SNR is brightest in the southeast, the SNR is more circular and extended in the X-ray map, and individual features in the optical and X-ray images do not in general correspond with one another. The asymmetry of the optical image and the relatively high X-ray and optical luminosity of this remnant both arise from its interaction with an extended dense cloud to the southeast seen in CO emission. The optical spectra reveal clear evidence of reddening variations on spatial scales as small as approximately 2" over the face of the SNR. Ultraviolet line emission is associated primarily with the bright optical filaments, and we measure the total luminosity of N49 in several optical and UV lines. A combined analysis of IUE and optical spectra indicates a range of radiative shock velocities. The bulk of the observed emission emanates from shocks with velocities less-than-or-equal-to 140 km s-1, although echelle data indicate that faint shocks greater-than-or-equal-to 200 km s-1 must be present. Upon modeling the spectrum, we find that a power-law velocity distribution corresponding to 40 km s-1 less-than-or-equal-to V(s) less-than-or-equal-to 270 km s-1 provides a good match, with the bulk of the emission arising from the slower shocks. Preshock densities of 20-940 cm-3 and postshock nonthermal pressure support are required to account for both the total optical and UV luminosities and the densities inferred from the [S II] doublet. We derive improved elemental abundances for N49. We conclude by discussing implications for the interstellar medium surrounding N49. We develop a model invoking a Sedov solution in which the main blast wave also encounters large clouds. For this model, we demonstrate that the energetics of N49's evolution as a whole and blast wave/cloud interactions on a smaller scale are self-consistent. C1 SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP VANCURA, O (reprint author), JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,CTR ASTROPHYS SCI,34TH & CHARLES ST,BALTIMORE,MD 21218, USA. NR 66 TC 90 Z9 90 U1 0 U2 0 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 1992 VL 394 IS 1 BP 158 EP & DI 10.1086/171567 PN 1 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JD343 UT WOS:A1992JD34300016 ER PT J AU POPHAM, R NARAYAN, R AF POPHAM, R NARAYAN, R TI SUPERSONIC INFALL AND CAUSALITY IN ACCRETION DISK BOUNDARY-LAYERS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; HYDRODYNAMICS AB Previous studies of accretion disk boundary layers have indicated the presence of supersonic radial inflows. Such flows are troubling since they would presumably break causal contact between the accreting central star and the disk, thus calling into question the physical self-consistency of the solutions. We identify certain nonphysical aspects of the standard alpha-viscosity prescription as the cause of this paradoxical behavior, and we develop a more physically realistic model of viscosity. We first modify the viscosity coefficient to account for the reduced radial pressure scale height in the boundary layer. This reduces the radial velocities, but, as noted by previous workers, does not eliminate supersonic infall for large values of alpha. We then include a second factor to allow for the fact that the viscosity coefficient must vanish when the steady-state radial velocity of the flow reaches the maximum speed of the diffusive particles (in this case, turbulent fluid blobs) that produce the viscosity. When this modification is used, we find causally connected, physically self-consistent solutions for all choices of parameters. We thus conclude that information flow between the star and the disk can be maintained in all steady-state accreting systems. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. RP POPHAM, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 11 TC 51 Z9 51 U1 0 U2 0 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 1992 VL 394 IS 1 BP 255 EP 260 DI 10.1086/171577 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JD343 UT WOS:A1992JD34300026 ER PT J AU NARAYAN, R AF NARAYAN, R TI A FLUX-LIMITED MODEL OF PARTICLE DIFFUSION AND VISCOSITY SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; DIFFUSION; HYDRODYNAMICS; RADIATIVE TRANSFER AB The standard diffusion equation that is used to model diffusive phenomena suffers from a serious defect, namely it violates causality. Levermore and Pomraning developed a flux-limited diffusion theory (FDT) for radiative transfer that overcomes this limitation. The present paper develops extensions of FDT which can be used to model steady state particle diffusion and viscous transport. The key improvement is that the diffusing particles are allowed to have a range of speeds, whereas in FDT they are assumed to have a single speed (which is appropriate for radiation). Expressions are given for the diffusion constant and the viscosity coefficient in steady state flows with bulk motion. Heuristic prescriptions are also presented for possible application in time-dependent moving flows. RP NARAYAN, R (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 5 TC 50 Z9 51 U1 1 U2 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 JUL 20 PY 1992 VL 394 IS 1 BP 261 EP 267 DI 10.1086/171578 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JD343 UT WOS:A1992JD34300027 ER PT J AU MA, Q TIPPING, RH AF MA, Q TIPPING, RH TI A FAR WING LINE-SHAPE THEORY AND ITS APPLICATION TO THE FOREIGN-BROADENED WATER CONTINUUM ABSORPTION .3. SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID STATISTICAL-THEORY; ROTATIONAL BANDS; REGION; VAPOR AB The far wing line shape theory developed previously and applied to the calculation of the continuum absorption of pure water vapor is extended to foreign-broadened continua. Explicit results are given for H2O-N2 and H2O-CO2 in the frequency range from 0 to 10 000 cm-1. The theory is based on the quasistatic and binary collision approximations and assumes for the interaction potential an isotropic Lennard-Jones part and the leading anisotropic multipolar (dipole-quadrupole) term. For H2O-N2, the positive and negative resonant frequency average line shape functions and absorption coefficients are calculated for a number of temperatures between 296 and 430 K for comparison with existing laboratory data. In general, the agreement is very good, especially at the higher temperatures for which the experimental absorption is larger and the corresponding error limits are smaller. For H2O-CO2 for which no experimental data exists, the calculations are made only at 296 K. Because of the significantly different line shapes for self vs foreign broadening, the ratio of the corresponding continuum absorption coefficients varies widely as a function of the frequency. The implications of this for absorption in the Earth's atmosphere are discussed briefly. C1 UNIV ALABAMA,DEPT PHYS & ASTRON,TUSCALOOSA,AL 35487. GODDARD SPACE FLIGHT CTR,INST SPACE STUDIES,NEW YORK,NY 10025. HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP MA, Q (reprint author), COLUMBIA UNIV,CTR STUDY GLOBAL HABITABIL,NEW YORK,NY 10025, USA. NR 16 TC 44 Z9 46 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 15 PY 1992 VL 97 IS 2 BP 818 EP 828 DI 10.1063/1.463184 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA JM253 UT WOS:A1992JM25300008 ER PT J AU BERMINGHAM, E ROHWER, S FREEMAN, S WOOD, C AF BERMINGHAM, E ROHWER, S FREEMAN, S WOOD, C TI VICARIANCE BIOGEOGRAPHY IN THE PLEISTOCENE AND SPECIATION IN NORTH-AMERICAN WOOD WARBLERS - A TEST OF MENGEL MODEL SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE GLACIAL CYCLES; MITOCHONDRIAL DNA PHYLOGENY; DENDROICA ID MITOCHONDRIAL-DNA; NUCLEOTIDE SUBSTITUTIONS; EVOLUTION; DIFFERENTIATION; POPULATIONS; NUMBER AB It is widely believed that habitat fragmentation during the Pleistocene initiated speciation events in many songbird genera. One such vicariance model for avian speciation in the Pleistocene was developed by R. M. Mengel for North American birds. This model suggests that the first Pleistocene glacial advance reduced the area of an extensive, eastern North American deciduous forest, forcing adaptation by some species to boreal forest. This, in turn, facilitated the development of transcontinental range expansions during interglacials. Subsequent glacial advances repeatedly fragmented the ranges of these species into eastern and western populations; western isolates speciated to form the multispecies groups observed among various North American birds. We used mtDNA restriction site data to reconstruct the phylogeny of the black-throated green warbler complex-the group that Mengel considered the best fit to his model. Contrary to Mengel's model, the phylogeny indicates that not all western endemics were derived from an eastern ancestor. Instead, our results imply a mix, wherein some western endemics were budded off an eastern source, as Mengel posits, while others probably resulted from intermontane isolations in the west. C1 UNIV WASHINGTON,DEPT ZOOL NJ-15,SEATTLE,WA 98195. UNIV WASHINGTON,BURKE MUSEUM DB-10,SEATTLE,WA 98195. RP BERMINGHAM, E (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APO AA,MIAMI,FL 34002, USA. NR 48 TC 113 Z9 114 U1 1 U2 7 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD JUL 15 PY 1992 VL 89 IS 14 BP 6624 EP 6628 DI 10.1073/pnas.89.14.6624 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JD675 UT WOS:A1992JD67500082 PM 11607307 ER PT J AU ZAGLAUER, HW AF ZAGLAUER, HW TI NEUTRON-STARS AND GRAVITATIONAL SCALARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GRAVITATION; RELATIVITY; STARS, NEUTRON ID BRANS-DICKE; GRAVITY; INFLATION AB The structure of neutron stars is investigated in the context of a scalar-tensor theory of gravity with variable Brans-Dicke parameter omega(phi). Neutron star models are constructed using the Pandharipande (hyperon) equation of state and an equation of state that maximizes the mass for various values of the variability parameter alpha = 2-omega'(phi)/[3 + 2-omega(phi)]2. It is shown that the neutron stars are more compact and less massive than their counterparts in general relativity and standard Brans-Dicke theory. The compactness of an astrophysical body is generally measured by its sensitivity to changes in the gravitational constant and is important in the analysis of the orbital motion in close binary systems. We give a more general definition for this sensitivity in a general scalar-tensor theory and calculate its dependence on alpha. The effects can be quite significant even for omega > 500 and alpha within the experimental bounds and can therefore provide a window for testing scalar-tensor theories of gravity that are indistinguishable from general relativity in the solar system. RP ZAGLAUER, HW (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 28 TC 24 Z9 24 U1 0 U2 0 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 10 PY 1992 VL 393 IS 2 BP 685 EP 696 DI 10.1086/171537 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JA516 UT WOS:A1992JA51600023 ER PT J AU DONAHUE, RA BALIUNAS, SL AF DONAHUE, RA BALIUNAS, SL TI EVIDENCE OF DIFFERENTIAL SURFACE ROTATION IN THE SOLAR-TYPE STAR HD-114710 SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, ROTATION; STARS, ACTIVITY; STARS, CHROMOSPHERES; STARS, INDIVIDUAL (HD-114710) ID MAIN-SEQUENCE STARS; EMISSION-LINE FLUXES; STELLAR ROTATION; K-EMISSION; TIME-SERIES; COOL STARS; CALIBRATION AB Observations of the chromospheric Ca II H and K emission variability of the intermediate-age solar-type star HD 114710 (beta-Comae Berenices, G0 V) obtained at Mount Wilson Observatory over the past 10 years reveal a secular change in the seasonal rotation period that can be interpreted as surface differential rotation. The dependence of rotation period on chromospheric flux (i.e., activity-cycle phase) suggests that the star may have two latitudinal zones of activity: one in which changes in rotation period appear to follow the starspot activity cycle, and another confined to a narrow range of periods that does not. The pattern of rotation that depends on stellar cycle phase is opposite that of the Sun: the rotation period increased as activity declined during the last activity cycle. Active region growth and decay is ruled out as the explanation for the systematic change of the seasonal rotation periods. C1 NEW MEXICO STATE UNIV,DEPT ASTRON,LAS CRUCES,NM 88003. TENNESSEE STATE UNIV,CTR EXCELLENCE INFORMAT SYST,NASHVILLE,TN 37203. RP DONAHUE, RA (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 23 TC 34 Z9 34 U1 0 U2 0 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 10 PY 1992 VL 393 IS 2 BP L63 EP L66 DI 10.1086/186452 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JA517 UT WOS:A1992JA51700006 ER PT J AU YAMAOKA, H NOMOTO, K SHIGEYAMA, T THIELEMANN, FK AF YAMAOKA, H NOMOTO, K SHIGEYAMA, T THIELEMANN, FK TI LATE DETONATION MODELS FOR THE TYPE-IA SUPERNOVAE SN-1991T AND SN-1990N SO ASTROPHYSICAL JOURNAL LA English DT Article DE NUCLEOSYNTHESIS; SUPERNOVAE, GENERAL; SUPERNOVAE, INDIVIDUAL (SN-1990N); SUPERNOVAE, INDIVIDUAL (SN-1991T); WHITE DWARFS ID WHITE-DWARF MODELS; EXPLOSIVE NUCLEOSYNTHESIS AB We present hydrodynamical models of exploding white dwarfs to account for the newly observed premaximum features of Type la supernovae 1990N and 1991T in a unified manner. In these models, a carbon deflagration, producing a central Fe/Co/Ni core and an intermediate Si/S/Ca layer, is later transformed into a detonation in the outermost layer. Depending on the transition density, the nucleosynthesis in such late detonations results in the formation of Fe-dominated surface layers or Si/Fe-rich surface layers, which are qualitatively consistent with the inferred composition of SN 1991T and 1990N, respectively. C1 MAX PLANCK INST ASTROPHYS,W-8046 GARCHING,GERMANY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP YAMAOKA, H (reprint author), UNIV TOKYO,FAC SCI,DEPT ASTRON,TOKYO 113,JAPAN. RI Nomoto, Ken'ichi/A-4393-2011; SHIGEYAMA, TOSHIKAZU/G-4894-2014 NR 26 TC 51 Z9 51 U1 0 U2 0 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 10 PY 1992 VL 393 IS 2 BP L55 EP L58 DI 10.1086/186450 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JA517 UT WOS:A1992JA51700004 ER PT J AU AVISHAI, Y REDHEFFER, RM BAND, YB AF AVISHAI, Y REDHEFFER, RM BAND, YB TI ELECTRON-STATES IN A MAGNETIC-FIELD AND RANDOM IMPURITY POTENTIAL - USE OF THE THEORY OF ENTIRE-FUNCTIONS SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article AB We determine the wavefunction of an electron in the presence of a transverse magnetic field and randomly located delta function impurities in the x-y plane within the subspace of the lowest Landau level. The wavefunction contains as a factor an entire function of z = x + iy which vanishes at all impurity sites. The question of whether such states are extended is related to the rate of growth of an entire function in terms of the distribution of its zeros. For a homogeneous distribution of impurities the corresponding Weierstrass product is of order 2 and of finite type. This rate of growth can be exactly compensated by the Gaussian term due to the presence of the magnetic field such that there is a critical field beyond which extended states may exist. If the impurities are located on the sites of a square lattice, the extended states are given in closed form in terms of the Weierstrass sigma-function. C1 BEN GURION UNIV NEGEV,DEPT CHEM,BEER SHEVA,ISRAEL. UNIV CALIF LOS ANGELES,DEPT MATH,LOS ANGELES,CA 90024. HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP AVISHAI, Y (reprint author), BEN GURION UNIV NEGEV,DEPT PHYS,BEER SHEVA,ISRAEL. NR 8 TC 21 Z9 21 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUL 7 PY 1992 VL 25 IS 13 BP 3883 EP 3889 DI 10.1088/0305-4470/25/13/032 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA JD899 UT WOS:A1992JD89900032 ER PT J AU FREYER, BM AF FREYER, BM TI ROYAL ART OF BENIN FROM THE PERLS-COLLECTION - TREASURES FROM AN AFRICAN KINGDOM SO AFRICAN ARTS LA English DT Art Exhibit Review RP FREYER, BM (reprint author), SMITHSONIAN INST,NATL MUSEUM AFRICAN ART,WASHINGTON,DC 20560, USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU UNIV CALIF PI LOS ANGELES PA AFRICAN STUDIES CNTR, LOS ANGELES, CA 90024 SN 0001-9933 J9 AFR ARTS JI Afr. Arts PD JUL PY 1992 VL 25 IS 3 BP 90 EP 91 DI 10.2307/3337006 PG 2 WC Art SC Art GA JF826 UT WOS:A1992JF82600013 ER PT J AU ROSS, M FLOHR, MJK ROSS, DR AF ROSS, M FLOHR, MJK ROSS, DR TI CRYSTALLINE SOLUTION SERIES AND ORDER-DISORDER WITHIN THE NATROLITE MINERAL GROUP SO AMERICAN MINERALOGIST LA English DT Article ID ALKALINE IGNEOUS ROCKS; NEUTRON-DIFFRACTION; X-RAY; STRUCTURE REFINEMENT; MAGNET-COVE; SCOLECITE; MESOLITE; NA2AL2SI3O10.2H2O; THOMSONITE; ARKANSAS AB The zeolite minerals of the natrolite group (natrolite, tetranatrolite, paranatrolite, mesolite, scolecite, thomsonite, gonnardite, edingtonite, and tetraedingtonite) have the general formula (Na,Ca,Ba)8-16(Al,Si)40O80.nH2O. Electron microprobe and X-ray analyses were made of natrolite, tetranatrolite, gonnardite, and thomsonite from the Magnet Cove alkaline igneous complex, Arkansas, and of selected specimens from the U.S. National Museum. This information and data from the literature indicate that natrolite, mesolite, scolecite, edingtonite, and tetraedingtonite show only small deviations from the ideal stoichiometry. In contrast, gonnardite, tetranatrolite, and thomsonite show large deviations from the ideal end-member compositions and compose three crystalline series. These are (1) the gonnardite series given by squarexNa16-3xCa2xAl16+xSi24-xO80.nH2O, where x varies from approximately 0.3 to 3.2 and square denotes a cation vacancy in the intraframework channels, (2) the tetranatrolite series given by square0Na16-,CaxAl16+xSi24-xO80.16H2O, where x varies from approximately 0.4 to 4, and (3) the thomsonite series given by square4Na4+xCa8-xAl20-xSi20+xO80.24H2O, where x varies from approximately 0 to 2. The structures of the natrolite minerals are composed of chains of AlO4 and SiO4 tetrahedra that link in one of three ways to form the natrolite-, thomsonite-, or edingtonite-type frameworks. The intraframework channels are occupied by NaO4(H2O)2, (Na,Ca)O4(H2O)2, CaO4(H2O)3, CaO4(H2O)2, (Na,Ca)O4(H2O)4, or BaO6(H2O)4 polyhedra. The Na-bearing polyhedra are edge linked to form continuous chains, whereas the Ca and Ba polyhedra are isolated from one another by channel vacancies. The structures of the natrolite minerals are defined by combining each of the three types of framework structures with various combinations of channel-occupying polyhedra. Various polysomatic series can be constructed by combining slices of two basic structures to form new hybrid structures. The compositional variation and complex crystallography of gonnardite can be explained if the gonnardite series is a polysomatic series composed of mixed domains of natrolite and thomsonite. A paranatrolite series (square0Na16-xCaAl16+xSi24-xO80.24H2O) is predicted, and it is proposed that the structure of paranatrolite combines the natrolite framework with channel-filling NaO4(H2O)2 and (Na,Ca)O4(H2O)4 polyhedra. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. RP ROSS, M (reprint author), US GEOL SURVEY,MS 959,RESTON,VA 22092, USA. NR 50 TC 49 Z9 52 U1 0 U2 3 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD JUL-AUG PY 1992 VL 77 IS 7-8 BP 685 EP 703 PG 19 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA JH846 UT WOS:A1992JH84600001 ER PT J AU KAMPF, AR DUNN, PJ FOORD, EE AF KAMPF, AR DUNN, PJ FOORD, EE TI PARAFRANSOLETITE, A NEW DIMORPH OF FRANSOLETITE FROM THE TIP TOP PEGMATITE, CUSTER, SOUTH-DAKOTA SO AMERICAN MINERALOGIST LA English DT Article AB Parafransoletite, Ca3Be2(PO4)2(PO3OH)2.4H2O, is a triclinic dimorph of fransoletite from the Tip Top Pegmatite near Custer, South Dakota. Cell parameters are a = 7.327(1) angstrom, b = 7.696(1) angstrom, c = 7.061(1) angstrom, alpha = 94.903(5)-degrees, beta = 96.820(5)-degrees, gamma = 101.865(5)-degrees, and Z = 1; group P1BAR. The strongest X-ray powder diffraction lines are [d in angstrom (I)(hkl)] 3.032(100)(201,112BAR,112BAR,211BAR), 3.619(80)(111), 2.595(60)(112), 7.52(50)(010), 2.334(40)(220, 301BAR). Parafransoletite is a secondary mineral found on fracture surfaces in beryl along with roscherite, montgomeryite, robertsite, mitridatite, whitlockite, and englishite. It occurs as colorless to white spear-shaped blades up to 0.4 x 0.1 x 0.04 mm, as sheaf- and bow tie-like aggregates, and as compact radial sprays to 2 mm in diameter. Individual crystals are flattened on {010}, elongate parallel-to [100], and exhibit the forms {010}, {011}, {131BAR}, {131BAR}, and {144BAR}. The luster is vitreous for individual crystals, silky for aggregates. The Mohs hardness is about 2 1/2, and no cleavage was observed. The density is 2.54(1) g/cm3 (meas), 2.56 g/cm3 (calc). Optically, the mineral is biaxial positive with alpha = 1.562(2), beta = 1.564(2), gamma = 1.588(2); Euler angles are phi = 98-degrees, theta = 85-degrees, psi = -13-degrees; 2V (calc) = 33-degrees. Parafransoletite, like most beryllophosphate minerals, results from the reaction of beryl with P-bearing hydrothermal solutions. The formation of these minerals is probably highly dependent upon pH. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. US GEOL SURVEY,DENVER FED CTR,LAKEWOOD,CO 80225. RP KAMPF, AR (reprint author), NAT HIST MUSEUM LOS ANGELES,MINERAL SECT,900 EXPOSIT BLVD,LOS ANGELES,CA 90007, USA. NR 6 TC 6 Z9 6 U1 0 U2 0 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD JUL-AUG PY 1992 VL 77 IS 7-8 BP 843 EP 847 PG 5 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA JH846 UT WOS:A1992JH84600017 ER PT J AU RALL, WF AF RALL, WF TI CRYOPRESERVATION OF OOCYTES AND EMBRYOS - METHODS AND APPLICATIONS SO ANIMAL REPRODUCTION SCIENCE LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONGRESS ON ANIMAL REPRODUCTION : CLINICAL TRENDS AND BASIC RESEARCH IN ANIMAL REPRODUCTION CY AUG 23-27, 1992 CL HAGUE, NETHERLANDS ID UNFERTILIZED MOUSE OOCYTES; DEVELOPMENTAL CAPACITY; RABBIT OOCYTES; INVITRO; SURVIVAL; FROZEN; VITRIFICATION; FERTILIZATION; MATURATION; ORGANIZATION AB The benefits of oocyte and embryo cryopreservation originate from its ability to arrest all biological processes and place cells into a state of suspended animation. Such interruption of embryogenesis for any period of time provides a powerful method of controlling animal reproduction. The universal appeal of this approach is illustrated by recent surveys of bovine embryo transfer practitioners suggesting that over one-third of embryos collected in the USA and Europe were cryopreserved. This is an area of rapid scientific and technological advancement based on rapidly evolving concepts in the fields of cryobiology, embryology and animal reproduction. RP RALL, WF (reprint author), SMITHSONIAN INST,NATL ZOOL PK,CONNECTICUT AVE NW,DEPT ANIM HLTH,WASHINGTON,DC 20008, USA. NR 34 TC 66 Z9 72 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4320 J9 ANIM REPROD SCI JI Anim. Reprod. Sci. PD JUL PY 1992 VL 28 IS 1-4 BP 237 EP 245 DI 10.1016/0378-4320(92)90110-Y PG 9 WC Agriculture, Dairy & Animal Science; Reproductive Biology SC Agriculture; Reproductive Biology GA JH835 UT WOS:A1992JH83500027 ER PT J AU WILDT, DE AF WILDT, DE TI GENETIC RESOURCE BANKS FOR CONSERVING WILDLIFE SPECIES - JUSTIFICATION, EXAMPLES AND BECOMING ORGANIZED ON A GLOBAL BASIS SO ANIMAL REPRODUCTION SCIENCE LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONGRESS ON ANIMAL REPRODUCTION : CLINICAL TRENDS AND BASIC RESEARCH IN ANIMAL REPRODUCTION CY AUG 23-27, 1992 CL HAGUE, NETHERLANDS ID DEER DAMA-DAMA; FALLOW DEER; INTRAUTERINE INSEMINATION; SEMEN; FERTILIZATION; PREGNANCY; INVITRO AB The cryopreservation of germ plasm and embryos combined with assisted reproduction play a continuing, vital role in sustaining and improving animal agriculture. It only is logical that similar types of technologies could be useful for preserving other forms of bio- and genetic-diversity, many of which are under the threat of extinction. The benefits of genetic resource banking for conservation purposes are even more profound than for domesticated livestock. In addition to preserving genetic vigor and enhancing captive propagation, these frozen repositories could provide a high level of insurance against further losses of diversity or entire species. Particularly important is that biological material could be recovered from free-living animals, stored and used without removing more individuals from native habitats. Three ongoing research projects at the National Zoological Park involving cervids, mustelids and felids are reviewed to demonstrate the potential of assisted reproduction for species preservation. Furthermore, rapidly evolving global strategies are discussed that will provide organization to the systematic collection, storage and use of germ plasm, embryos, blood products, tissue and DNA. Even given current restricted financial support for efforts, all evidence suggests that genetic resource banks will be contributing significantly to the conservation of rare wildlife species as we enter the 21st century. RP WILDT, DE (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008, USA. NR 27 TC 98 Z9 100 U1 3 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4320 J9 ANIM REPROD SCI JI Anim. Reprod. Sci. PD JUL PY 1992 VL 28 IS 1-4 BP 247 EP 257 PG 11 WC Agriculture, Dairy & Animal Science; Reproductive Biology SC Agriculture; Reproductive Biology GA JH835 UT WOS:A1992JH83500028 ER PT J AU HAZEN, ML NEMEC, JM AF HAZEN, ML NEMEC, JM TI VARIABLE-STARS WITHIN 25 ARCMIN OF THE LMC GLOBULAR-CLUSTER NGC 2210 SO ASTRONOMICAL JOURNAL LA English DT Article ID LARGE MAGELLANIC CLOUD; RR-LYRAE STARS; OOSTERHOFF PERIOD GROUPS; CCD OBSERVATIONS; PHOTOMETRY; NGC-2257; AGE; NGC-1786; DISTANCE; GALAXY AB Based on a photometric analysis of 63 photographic plates taken between 1975 and 1985 with the CTIO 1.5 and 4 m telescopes, and new photoelectric and CCD photometry, pulsational characteristics are presented for 52 newly discovered field RR Lyrae variables within 0.5-degrees of the LMC globular cluster NGC 22 1 0. The surface density of the field RR Lyrae stars is 80 per square degree, which is as high as that found in Graham's NGC 1783 field, and higher than that found in several outer halo fields of the LMC. Eleven RR Lyrae stars located within the tidal radius of the cluster, and 33 non-RR Lyrae field variables are also discussed. The mean periods of the 40 ab-type and 12 c-type field RR Lyrae stars, [P(ab)]=0.576 +/- 0.057 day and [P(c)]=0.345 +/- 0.049 day, fall between the values for the two Oosterhoff groups in our Galaxy. Since such mean periods are also found in the NGC 1783 and NGC 2257 regions of the LMC, we conclude that such an intermediate Oosterhoff type is a general characteristic of LMC field RR Lyrae stars. Based on a comparison of the observed period-amplitude (P-A) relation with those for the RR Lyrae stars in the galactic globular clusters M3 and M15, the mean metallicity of the NGC 2210 field RR Lyrae stars appears to be [Fe/H]= -1.8. Support for this conclusion comes also from the observed ratio of RRab to RRc stars. The mean [B] for the field variables, 19.56 +/- 0.02 mag, when taken with an assumed distance to the LMC of 50 +/- 3 kpc, and a line-of-sight reddening E (B - V)=0.08 +/- 0.01, suggests that the absolute magnitude of the field RR Lyrae stars is M(B)=0.75 +/- 0.20 mag. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. WASHINGTON STATE UNIV,PROGRAM ASTRON,PULLMAN,WA 99164. NR 34 TC 20 Z9 20 U1 0 U2 0 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 JUL PY 1992 VL 104 IS 1 BP 111 EP & DI 10.1086/116224 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JA232 UT WOS:A1992JA23200009 ER PT J AU KRICHBAUM, TP WITZEL, A GRAHAM, DA ALEF, W PAULINYTOTH, IIK HUMMEL, CA QUIRRENBACH, A INOUE, M HIRABAYASHI, H MORIMOTO, M ROGERS, AEE ZENSUS, JA LAWRENCE, CR READHEAD, ACS BOOTH, RS RONNANG, BO KUS, AJ JOHNSTON, KJ SPENCER, JH BURKE, BF DHAWAN, V BARTEL, N SHAPIRO, II ALBERDI, A MARCAIDE, JM AF KRICHBAUM, TP WITZEL, A GRAHAM, DA ALEF, W PAULINYTOTH, IIK HUMMEL, CA QUIRRENBACH, A INOUE, M HIRABAYASHI, H MORIMOTO, M ROGERS, AEE ZENSUS, JA LAWRENCE, CR READHEAD, ACS BOOTH, RS RONNANG, BO KUS, AJ JOHNSTON, KJ SPENCER, JH BURKE, BF DHAWAN, V BARTEL, N SHAPIRO, II ALBERDI, A MARCAIDE, JM TI THE EVOLUTION OF THE SUB-PARSEC STRUCTURE OF 3C 84 AT 43 GHZ SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE GALAXIES, ACTIVE; GALAXIES, SEYFERT-GALAXIES, 3C 84; GALAXIES, JETS OF; IMAGE PROCESSING; INTERFEROMETRY ID COMPACT RADIO-SOURCES; LONG BASELINE INTERFEROMETRY; ACTIVE GALAXY NGC-1275; VLBI OBSERVATIONS; ANGULAR RESOLUTION; RELATIVISTIC JETS; PERSEUS-A; NUCLEUS; WAVELENGTH; ACCRETION AB We present 43 GHz VLBI observations of the peculiar Seyfert-like radiogalaxy 3C 84 (NGC 1275), with an angular resolution of approximately 0.1 mas, corresponding to an intrinsic linear scale of approximately 30 light-days (H0 = 100 km s-1 Mpc-1, q0 = 0.5). The inclusion of reanalyzed data-sets from earlier 43 GHz VLBI observations has enabled us to make new images with high spatial resolution of the core region of 3C 84 and to attribute the previously found subluminal expansion to subluminal motion (beta(app) = 0.1-0.2) of several components in a northern milliarcsecond-jet. A surrounding halo-like structure is apparently contracting with a rate of approximately 0.14 mas yr-1 (beta(app) approximately -0.12). We further find evidence for existing faint emission embedded in the extended southern lobe region, predominating at longer wavelengths. Our data suggest the occurrence of motion in this region with typical velocities of beta(app) almost-equal-to 0.5, in good agreement with earlier results obtained at 22 GHz. The combination with 22 GHz data yields evidence for motion along a curved path - inclined by 60-90-degrees against the northern mass-jet - for the southern component S2. The possible spatial curvature of the jet in 3C 84 and its implications for the jet-to-counterjet ratio are discussed. C1 NOBEYAMA RADIO OBSERV, NOBEYAMA, JAPAN. HAYSTACK OBSERV, NEROC, WESTFORD, MA USA. NATL RADIO ASTRON OBSERV, SOCORRO, NM 87801 USA. CALTECH, PASADENA, CA 91125 USA. ONSALA SPACE OBSERV, ONSALA, SWEDEN. USN, RES LAB, WASHINGTON, DC 20375 USA. MIT, CAMBRIDGE, MA 02139 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. INST ASTROFIS ANDALUCIA, GRANADA, SPAIN. RP KRICHBAUM, TP (reprint author), MAX PLANCK INST RADIOASTRON, HUGEL 69, W-5300 BONN 1, GERMANY. NR 66 TC 34 Z9 34 U1 0 U2 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 JUL PY 1992 VL 260 IS 1-2 BP 33 EP 48 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JE834 UT WOS:A1992JE83400007 ER PT J AU MASSAGLIA, S TRUSSONI, E BODO, G ROSSI, P FERRARI, A AF MASSAGLIA, S TRUSSONI, E BODO, G ROSSI, P FERRARI, A TI RADIATIVE UNSTABLE MODES IN THE JETS OF YOUNG STELLAR OBJECTS SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE HYDRODYNAMICS; STARS, PRE-MAIN-SEQUENCE; INTERSTELLAR MEDIUM, JETS AND OUTFLOWS ID KELVIN-HELMHOLTZ INSTABILITIES; LONG-SLIT SPECTROSCOPY; GALACTIC RADIO-SOURCES; EXISTING DATA; STABILITY; EVOLUTION; OUTFLOWS; FLOWS; STARS AB Young stellar objects (YSOs) frequently show collimated outflows that terminate in a hot spot, usually interpreted as the bow shock originated by the head of a supersonic jet as it interacts with the external medium. In addition to this hot spot, some stellar jets present knots of emission along their axes, whose origin has been ascribed to Kelvin-Helmholz (K-H) reflected modes evolved into shocks. We analyze, in connection to this phenomenology, the stability of an infinite cylindrical fluid beam undergoing radiative losses. We find that radiative cooling has a stabilizing effect on reflected modes, that critically depends on small variations of the temperature of the jet's matter. We also note that, along with K-H modes, a radiative jet can be made unstable by thermal instability. C1 OSSERV ASTRON TORINO, I-10025 PINO TORINESE, ITALY. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP MASSAGLIA, S (reprint author), UNIV TURIN, INST FIS GEN, VIA P GIURIA 1, I-10125 TURIN, ITALY. RI Bodo, Gianluigi/F-9223-2012 OI Bodo, Gianluigi/0000-0002-9265-4081 NR 27 TC 23 Z9 23 U1 0 U2 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 JUL PY 1992 VL 260 IS 1-2 BP 243 EP 249 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JE834 UT WOS:A1992JE83400029 ER PT J AU HUCHRA, J BURG, R AF HUCHRA, J BURG, R TI THE SPATIAL-DISTRIBUTION OF ACTIVE GALACTIC NUCLEI .1. THE DENSITY OF SEYFERT-GALAXIES AND LINERS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ACTIVE; GALAXIES, SEYFERT ID OPTICALLY SELECTED QUASARS; LUMINOSITY FUNCTION; COMPLETE SAMPLE; EMISSION; FIELD; EVOLUTION; POSITIONS; REDSHIFTS; SPECTRA AB We define and use a "complete" sample of 25 Seyfert 1 and 23 Seyfert 2 galaxies within the spatial bounds and magnitude limit of the CfA Redshift Survey. The spatial density of Seyfert galaxies is calculated; classical Seyfert galaxies comprise 1.3% of all galaxies at integrated absolute magnitude -20.0. This result is in substantial agreement with our previous estimates based on considerably more incomplete samples. The fraction of galaxies that are active galactic nuclei (AGNs) rises steeply with absolute magnitude. Three of the five galaxies in the CfA survey (2399 galaxies total) more luminous than M(B) = -21.5 are AGNs (H0 = 100 km s-1 Mpc-1); the two most luminous galaxies in the CfA survey are both Seyfert 1 galaxies. The integrated space density of Seyfert 2 galaxies is found to be approximately twice as large as the space density of Seyfert 1 galaxies. We also attempt to measure the spatial density of other types of "active" galactic nuclei-in particular LINERs, but find severe selection effects in our optically selected sample of such objects. C1 JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. RP HUCHRA, J (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 64 TC 251 Z9 251 U1 0 U2 0 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 BP 90 EP 97 DI 10.1086/171488 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ510 UT WOS:A1992HZ51000008 ER PT J AU KIM, DW FABBIANO, G TRINCHIERI, G AF KIM, DW FABBIANO, G TRINCHIERI, G TI THE X-RAY-SPECTRA OF GALAXIES .2. AVERAGE SPECTRAL PROPERTIES AND EMISSION MECHANISMS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ELLIPTIC AND LENTICULAR, CD; GALAXIES, SPIRAL; RADIATION MECHANISMS, MISCELLANEOUS; X-RAYS, GALAXIES ID STATISTICAL-ANALYSIS; EVOLUTION; SAMPLE; GAS; M82 AB We have systematically investigated the X-ray spectra of normal galaxies, by using the Imaging Proportional Counter (IPC) data in the Einstein data base. We find that on the average the X-ray emission temperature of spirals is higher than that of ellipticals. This is consistent with our understanding that accreting binaries are a major source of X-rays in spirals, while a hot interstellar medium (ISM) is present in ellipticals. The X-ray spectra of Sa galaxies are intermediate between those of ellipticals and spirals, suggesting that these galaxies contain hot gaseous emission as well as emission from accreting binaries. We confirm that the X-ray to optical ratio is an important indicator of the presence of a hot gaseous component in early-type galaxies. In particular we find that the emission temperature becomes higher with a decreasing X-ray to optical luminosity ratio in E and S0 galaxies. This result is what we would expect if the emission of X-ray faint early-type galaxies consists of a large evolved stellar component, while the gaseous emission becomes dominant in X-ray brighter galaxies. The group with the lowest L(X)/L(B) does not follow this trend. In these galaxies we find a very soft (kT approximately 0.2 keV) X-ray component, amounting to about half the total X-ray emission, in addition to the hard X-ray component. Possible explanations for this component include the integrated emission of M stars and a relatively cool ISM. A very soft component is also found in several spiral galaxies. This result may indicate that some spirals contain hot gaseous components similar to those seen in NGC 253 and M82. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. OSSERV ASTROFIS ARCETRI,I-50125 FLORENCE,ITALY. RP KIM, DW (reprint author), CHUNGNAM NATL UNIV,TAEJON 305764,SOUTH KOREA. NR 38 TC 136 Z9 136 U1 0 U2 0 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 BP 134 EP 148 DI 10.1086/171492 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ510 UT WOS:A1992HZ51000012 ER PT J AU GWINN, CR MORAN, JM REID, MJ AF GWINN, CR MORAN, JM REID, MJ TI DISTANCE AND KINEMATICS OF THE W49N H2O MASER OUTFLOW SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, KINEMATICS AND DYNAMICS; ISM, INDIVIDUAL (W49); ISM, JETS AND OUTFLOWS; ISM, MOLECULES; MASERS ID PROPER MOTIONS; STAR FORMATION; WATER MASER; REGIONS; SAGITTARIUS-B2; OBJECTS; ORION AB Study of the motions of 105 H2O maser features clustered around a newly formed star in W49N yields the kinematics of the gas flow, the distance to the source, and the spatial scale of the Milky Way. We find that the maser outflow is bipolar, with an opening angle of approximately 60-degrees and an inclination of approximately 40-degrees to the line of sight. The expansion has a constant velocity of approximately 18 km s-1 out to a radius of 0.1 pc, beyond which the outflow velocity increases to greater than 200 km s-1. This increase may be due to interaction with ambient material. A rotation is also present; this rotation is nearly perpendicular to the outflow axis. The rotation may be due to ram pressure from ambient material; rotation of the ring of H II regions described by Welch et al. could produce such nonradial motion. Comparison of Doppler velocities and proper motions yields a distance of 11.4 +/- 1.2 kpc for the maser cluster. Combining this with a kinematic distance for W49N from Galactic rotation, we obtain a value of R0, the distance to the Galactic center, of 8.1 +/- 1.1 kpc. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP GWINN, CR (reprint author), UNIV CALIF SANTA BARBARA,DEPT PHYS,BROIDA HALL,SANTA BARBARA,CA 93106, USA. NR 44 TC 172 Z9 173 U1 0 U2 0 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 BP 149 EP 164 DI 10.1086/171493 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ510 UT WOS:A1992HZ51000013 ER PT J AU LADA, CJ ADAMS, FC AF LADA, CJ ADAMS, FC TI INTERPRETING INFRARED COLOR-COLOR DIAGRAMS - CIRCUMSTELLAR DISKS AROUND LOW-MASS AND INTERMEDIATE-MASS YOUNG STELLAR OBJECTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; STARS, PRE-MAIN-SEQUENCE ID T-TAURI STARS; PHOTOMETRY; ACCRETION; MICRON AB We investigate the behavior of well-established evolutionary classes of young stellar objects in the JHK infrared color-color diagram. We examine observations of classical and weak-line T Tauri stars, Herbig AeBe stars, infrared protostars, and classical Be stars. We find that the different types of objects tend to occupy well-defined and different regions of the color-color diagram and that to some degree the evolutionary nature of a YSO can be determined from its position in JHK color-color space. In an attempt to provide a physical explanation for the observed JHK colors of YSOs, we explore the behavior of circumstellar disk models in the color-color diagram. We find that the JHK observations of classical T Tauri stars with infrared excesses can be well explained by standard disk models in agreement with earlier studies. However, standard disk models cannot account for the large infrared excesses and the distribution of AeBe stars in the color-color diagram unless (1) these model disks contain central holes and (2) the basic physical parameters of the disks always conspire to produce temperatures at the inner edges of the disks in the narrow range between 2000-3000 K. The close correspondence between the deduced temperatures at the inner edges of the disks and the dust sublimation temperature suggests that dust is the primary source of opacity at infrared wavelengths in circumstellar disks around AeBe stars. C1 UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109. RP LADA, CJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 42 TC 362 Z9 363 U1 0 U2 0 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 BP 278 EP 288 DI 10.1086/171505 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ510 UT WOS:A1992HZ51000025 ER PT J AU BEAUFUME, P COPPI, B GOLUB, L AF BEAUFUME, P COPPI, B GOLUB, L TI CORONAL LOOPS - CURRENT-BASED HEATING PROCESSES SO ASTROPHYSICAL JOURNAL LA English DT Article DE MHD; SUN, CORONA; SUN, MAGNETIC FIELDS ID X-RAY-EMISSION; MAGNETIC-FIELDS; ACTIVE REGIONS; SOLAR CORONA; DISSIPATION; ENERGY; FLARES; INSTRUMENT; STABILITY AB A set of new experimental observations on the structure of the solar corona (Golub et al.) is used as input to the formulation of a theoretical model of magnetic field-related coronal heating processes. Field-aligned currents are assumed to be induced along coronal loops in thin current sheaths given that the rate of current density diffusion is relatively low. The excitation of instabilities involving magnetic reconnection is proposed to occur and convert the energy associated with the current-related magnetic field directly into particle energy. The estimated heating rate in this phase exceeds the energetic requirements of the loop and the heating process is envisioned as proceeding via short bursts corresponding to an intermittent disruption of the current sheath configuration. Because of the relatively low transverse thermal conduction, only a small fraction of the loop volume is heated to a much higher temperature than the average value. This is consistent with the experimental observations of low filling factors of hot plasmas in coronal loops (published by Martens et al.) Thus the proposed model involves a repeated sequence of dynamic events taking into account the observed loop topology, the differential emission measure distribution in the 10(6)-10(7) K range, the energy balance requirements in the loop, and the probable duty cycles involved in the heating process. C1 CEN CADARACHE, DRFC, F-13108 ST PAUL DURANCE, FRANCE. MIT, DEPT PHYS, CAMBRIDGE, MA 02139 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NR 58 TC 30 Z9 32 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD JUL 1 PY 1992 VL 393 IS 1 BP 396 EP + DI 10.1086/171513 PN 1 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ510 UT WOS:A1992HZ51000033 ER PT J AU LADA, EA AF LADA, EA TI GLOBAL STAR FORMATION IN THE L1630 MOLECULAR CLOUD SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, STARS; ISM, INDIVIDUAL, L1630, ORION-B; RADIO LINES, MOLECULAR, INTERSTELLAR; STARS, FORMATION ID DARK CLOUD; REGION; ORION AB Recently, the first systematic and coordinated surveys for both dense gas and young stellar objects within a single molecular cloud, the L1630 molecular cloud, have been completed (see recent work by Lada; Lada, Bally, & Stark; Lada et al.) This Letter compares these two surveys. As a result, we find that (1) star formation in the L1630 molecular cloud occurs almost exclusively within the dense (n > 10(4) cm-3) gas; (2) star formation does not occur uniformly throughout the dense gas and is strongly favored in a few very massive (M > 200 M.) dense cores, where efficient conversion of molecular gas into stars has resulted in the production of rich stellar clusters; and (3) high gas densities and high gas mass may be necessary but not sufficient conditions for the formation of star clusters since two of the five most massive dense cores in the cloud have very low levels of star formation activity. RP LADA, EA (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 17 TC 79 Z9 79 U1 0 U2 0 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 BP L25 EP L28 DI 10.1086/186442 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ513 UT WOS:A1992HZ51300007 ER PT J AU RODRIGUEZ, LF CANTO, J TORRELLES, JM GOMEZ, JF HO, PTP AF 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 (reprint author), NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. RI Gomez, Jose Francisco/D-8392-2016; OI Gomez, Jose Francisco/0000-0002-7065-542X; Torrelles, Jose Maria/0000-0002-6896-6085 NR 22 TC 24 Z9 24 U1 0 U2 0 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 BP L29 EP L31 DI 10.1086/186443 PN 2 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ513 UT WOS:A1992HZ51300008 ER PT J AU WILKES, BJ ELVIS, M FIORE, F MCDOWELL, JC TANANBAUM, H LAWRENCE, A AF WILKES, BJ ELVIS, M FIORE, F MCDOWELL, JC TANANBAUM, H LAWRENCE, A TI PKS-0483-436 - A HIGH-REDSHIFT QUASAR WITH STRONG X-RAY ABSORPTION SO ASTROPHYSICAL JOURNAL LA English DT Article DE QUASARS, INDIVIDUAL (PKS-0438-436) ID SEYFERT-GALAXIES; SPECTRA; OBSCURATION; NUCLEI AB We report the first X-ray spectrum of a high-redshift (z = 2.85) quasar. The ROSAT PSPC spectrum of PKS 0438-436, covering 0.3-9 keV in the quasar's rest frame, reveals unexpected absorption of approximately 1 X 10(22) cm-2 assuming it occurs at the source. Only one other high-luminosity quasar (of greater than or similar to 50 observed by Einstein) shows significant absorption in its X-ray spectrum. Of the common line-of-sight absorbers, only highly ionized Ly-alpha-forest clouds may be able to explain this amount of absorption. Candidates for an intrinsic absorber are discussed. Absorption at approximately 1 keV (rest frame) is due primarily to heavy elements (0, Ne, Mg, Si, S) raising the possibility of measuring early universe abundances via X-ray absorption in this and like quasars. PKS 0438-436 may be a high-redshift member of a population of quasars which can contribute to the X-ray background above 2 keV, without being detectable by previous imaging missions. C1 QUEEN MARY & WESTFIELD COLL,DEPT PHYS,LONDON E1 4NS,ENGLAND. RP WILKES, BJ (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Fiore, Fabrizio/0000-0002-4031-4157 NR 30 TC 33 Z9 33 U1 0 U2 0 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 BP L1 EP L4 DI 10.1086/186436 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ513 UT WOS:A1992HZ51300001 ER PT J AU LEUNG, HO THADDEUS, P AF LEUNG, HO THADDEUS, P TI A COMPLETE CO SURVEY OF THE CYGNUS-X REGION SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE ISM, INDIVIDUAL (CYGNUSX); ISM, KINEMATICS AND DYNAMICS; ISM, MOLECULES; SURVEYS ID MOLECULAR CLOUDS; RADIAL-DISTRIBUTION; MILKY-WAY AB The Cygnus X region of the Galactic plane was mapped in the CO J = 1 <-- 0 transition at 115 GHz with the CfA Millimeter-Wave Telescope, a 1.2 m Cassegrain with a beamwidth of 8.7'. A total of 6029 spectra were obtained every 7.5' in l and h, covering approximately 94 deg2 in a region between l = 72.875-degrees to 86.750-degrees, and b = 4.00-degrees and 5.00-degrees. Velocity ranges associated with the Local, Perseus, and Outer Arms are analyzed here with a velocity resolution of 0.65 km s-1. A series of spatial maps of Cygnus X with high- and low-velocity resolution, and longitude-velocity maps with high- and low-latitude resolution are presented. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 15 TC 43 Z9 43 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD JUL PY 1992 VL 81 IS 1 BP 267 EP 301 DI 10.1086/191693 PG 35 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HZ731 UT WOS:A1992HZ73100011 ER PT J AU ADLER, GH AF ADLER, GH TI ENDEMISM IN BIRDS OF TROPICAL PACIFIC ISLANDS SO EVOLUTIONARY ECOLOGY LA English DT Article DE ARCHIPELAGOS; BIRDS; ENDEMIC SPECIES; PACIFIC OCEAN AB I analysed avifaunal data from 30 archipelagos and isolated islands in the tropical Pacific Ocean to examine the effects of geography on endemism. I divided the total bird species list (pelagic and migrant species excluded) for each island group into continental (also found outside of the study area), Pacific (found only within the study area but within more than one archipelago), and endemic (found only within a single archipelago) species and estimated ten variables related to the geography of each archipelago. I used multiple linear regression analysis to relate numbers and proportions of species in each category to the geographical variables. Total land area of an archipelago was the most important variable in explaining variation in the number of species in each category, with elevation and isolation also being important. The relationships between the proportions of species in each category and the geographical variables underscore the importance of isolation and the number of large islands in promoting endemism. presumably by allowing both inter- and intra-archipelagal speciation to proceed. RP ADLER, GH (reprint author), SMITHSONIAN TROP RES INST,UNIT 0948,APO AA 34002,BALBOA,PANAMA. NR 0 TC 25 Z9 25 U1 2 U2 5 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0269-7653 J9 EVOL ECOL JI Evol. Ecol. PD JUL PY 1992 VL 6 IS 4 BP 296 EP 306 DI 10.1007/BF02270966 PG 11 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA JD081 UT WOS:A1992JD08100002 ER PT J AU COATES, AG JACKSON, JBC COLLINS, LS CRONIN, TM DOWSETT, HJ BYBELL, LM JUNG, P OBANDO, JA AF COATES, AG JACKSON, JBC COLLINS, LS CRONIN, TM DOWSETT, HJ BYBELL, LM JUNG, P OBANDO, JA TI CLOSURE OF THE ISTHMUS OF PANAMA - THE NEAR-SHORE MARINE RECORD OF COSTA-RICA AND WESTERN PANAMA SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN LA English DT Article ID SOUTH-AMERICA; LIMON-BASIN; PLIOCENE; PALEOCEANOGRAPHY; EVOLUTION; PACIFIC; MIOCENE; MEXICO; GULF; STRATIGRAPHY AB The final closure of the Isthmus of Panama at approximately 3.5 Ma divided the American tropical ocean into two separate and different oceanographic regions. Consequences for the marine biota were profound, but, hitherto, correlation of the Pacific and Caribbean coastal sections has not been precise enough to track biologic patterns. We present here a correlation of 31 sections from the Pacific and Caribbean coasts of Costa Rica and western Panama. Using calcareous nannofossils and planktonic foraminifera at both the tops and bottoms of each formation, we estimate that the Caribbean section ranges from 8.2 Ma to 1.7 Ma; and the Pacific sequence, from 3.6 Ma to <1.7 Ma. These intervals bracket postulated dates for final closure of the Isthmus and provide the first well-dated record of middle and late Pliocene faunas from the region. The Caribbean and Pacific sections include very different environments of deposition, yet there is sufficient overlap and diversity of habitats to permit meaningful biological comparisons. On the Caribbean side, formations tied together by the overlap of the upper Pliocene markers Sphenolithus abies and Pseudo-emiliana lacunosa (3.5 Ma to 3.6 Ma) range from very shallow to shallow inner shelf (<200 m) and upper slope (200-800 m). The Pacific coast sections were mostly deposited in a trench slope environment, which is absent on the Caribbean side. These sections fortuitously include abundant thick intra-formational slumps containing shallow-water fauna more appropriate for biological comparison with the Caribbean biota. Similarly, the approximately 1.9 Ma to 1.5 Ma interval, well constrained by various taxa, includes middle- to outer-shelf, and inner-shelf to upper-slope deposits on the Caribbean side, and marginal-marine to inner-shelf deposits on the Pacific coast. Using our new biostratigraphic framework to correlate previously poorly constrained mollusc collections, we show that evolutionary divergence of the Pacific and Caribbean near-shore marine faunas had occurred by 3.5 Ma. This strongly suggests that the Isthmus was effectively closed by this time. C1 GEORGE WASHINGTON UNIV,DEPT GEOL,WASHINGTON,DC 20052. UNIV MICHIGAN,MUSEUM PALEONTOL,ANN ARBOR,MI 48109. RECOPE SA,SAN JOSE,COSTA RICA. US GEOL SURVEY,RESTON,VA 22092. NAT HIST MUSEUM,CH-4051 BASEL,SWITZERLAND. RP COATES, AG (reprint author), SMITHSONIAN TROP RES INST,BOX 2072,BALBOA,PANAMA. OI Dowsett, Harry/0000-0003-1983-7524 NR 74 TC 331 Z9 349 U1 5 U2 50 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0016-7606 J9 GEOL SOC AM BULL JI Geol. Soc. Am. Bull. PD JUL PY 1992 VL 104 IS 7 BP 814 EP 828 DI 10.1130/0016-7606(1992)104<0814:COTIOP>2.3.CO;2 PG 15 WC Geosciences, Multidisciplinary SC Geology GA JB686 UT WOS:A1992JB68600003 ER PT J AU WATTERS, TR AF WATTERS, TR TI SYSTEM OF TECTONIC FEATURES COMMON TO EARTH, MARS, AND VENUS SO GEOLOGY LA English DT Article ID REGION; STRESS; FAULT AB Investigations of landforms on the terrestrial planets have revealed a system of tectonic features consisting of long, narrow, regularly spaced folds and/or thrust faults, referred to as wrinkle ridges, and conjugate sets of cross-trending strike-slip faults. These are observed in the Yakima fold belt of the Columbia Plateau, Earth, the ridged plains of the Tharsis province, Mars, and the lowland plains of Lavinia Planitia, Venus. The wrinkle ridges and strike-slip faults reflect a relatively small amount of crustal shortening in these regions of distributed deformation. The observed geometric relations between the structures are consistent with those predicted by the Coulomb-Anderson model. Although the tectonic settings of the provinces studied on the three planets are very different, the crustal materials appear to have deformed in a similar manner. RP WATTERS, TR (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,CTR EARTH & PLANETARY STUDIES,WASHINGTON,DC 20560, USA. NR 24 TC 23 Z9 23 U1 1 U2 4 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0091-7613 J9 GEOLOGY JI Geology PD JUL PY 1992 VL 20 IS 7 BP 609 EP 612 DI 10.1130/0091-7613(1992)020<0609:SOTFCT>2.3.CO;2 PG 4 WC Geology SC Geology GA JB677 UT WOS:A1992JB67700009 ER PT J AU WHIPPLE, FL AF WHIPPLE, FL TI A VOLATILITY INDEX FOR COMETS SO ICARUS LA English DT Article RP WHIPPLE, FL (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 14 TC 4 Z9 4 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD JUL PY 1992 VL 98 IS 1 BP 108 EP 114 DI 10.1016/0019-1035(92)90211-O PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JF951 UT WOS:A1992JF95100011 ER PT J AU MANN, RW SHIELDS, ED AF MANN, RW SHIELDS, ED TI CAVITATION DEFECTS ON THE LINGUAL RAMUS - A FURTHER EXPRESSION OF STAFNE DEFECT SO JOURNAL OF CRANIOFACIAL GENETICS AND DEVELOPMENTAL BIOLOGY LA English DT Article DE IDIOPATHIC BONE CAVITY; STAFNE DEFECT; MANDIBLE ID MANDIBULAR BONE DEPRESSION AB Seven archaeological examples of 6,700 mandibles examined were found to have developmental cortical defects on the ramus. The defects, unusual in their position, were grossly and radiographically similar to developmental bone cavities (Stafne's) located in the sublingual region. Of the seven ramus defects, all of which were in adult males, six were in Alaskan Eskimos from Kodiak Island (N = 5) and Nelson Island (N = 1), and one was in a native American from Arkansas. Only five adult males from Finland have been reported with similar defects. A statistical examination of the metrics defining mandibular cavitation defects, along with prevalence data, suggest that the seemingly rare findings of ramus defects are an extreme manifestation of the continuum of severity of the Stafne's defect. Bilateral Stafne's defects also represent a severe manifestation. C1 SMITHSONIAN INST,DEPT ANTHROPOL,WASHINGTON,DC 20560. MCGILL UNIV,DEPT ORAL BIOL,MONTREAL H3A 2T5,QUEBEC,CANADA. MCGILL UNIV,CTR HUMAN GENET,MONTREAL H3A 2T5,QUEBEC,CANADA. RP MANN, RW (reprint author), USA,CENT IDENTIFICAT LAB,FT KAMEHAMEHA BLDG 45,HICKAM AFB,HI 96853, USA. NR 12 TC 12 Z9 12 U1 1 U2 1 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0270-4145 J9 J CRAN GENET DEV BIO JI J. Craniofac. Genet. Dev. Biol. PD JUL-SEP PY 1992 VL 12 IS 3 BP 167 EP 173 PG 7 WC Anatomy & Morphology; Developmental Biology; Genetics & Heredity SC Anatomy & Morphology; Developmental Biology; Genetics & Heredity GA JF943 UT WOS:A1992JF94300006 PM 1517396 ER PT J AU CHEVERUD, JM WILSON, P DITTUS, WPJ AF CHEVERUD, JM WILSON, P DITTUS, WPJ TI PRIMATE POPULATION STUDIES AT POLONNARUWA .3. SOMATOMETRIC GROWTH IN A NATURAL-POPULATION OF TOQUE MACAQUES (MACACA-SINICA) SO JOURNAL OF HUMAN EVOLUTION LA English DT Article DE GROWTH; TOQUE MACAQUE; BODY MEASUREMENTS; POLONNARUWA; SEXUAL DIMORPHISM; MACACA-SINICA ID DENTAL ERUPTION; OLIVE BABOONS; BODY SIZE; WILD; MULATTA; AGE C1 SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20008. INST FUNDAMENTAL STUDIES,KANDY,SRI LANKA. RP CHEVERUD, JM (reprint author), WASHINGTON UNIV,SCH MED,DEPT ANAT & NEUROBIOL,ST LOUIS,MO 63110, USA. NR 31 TC 38 Z9 39 U1 0 U2 9 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0047-2484 J9 J HUM EVOL JI J. Hum. Evol. PD JUL PY 1992 VL 23 IS 1 BP 51 EP 77 DI 10.1016/0047-2484(92)90043-9 PG 27 WC Anthropology; Evolutionary Biology SC Anthropology; Evolutionary Biology GA JF090 UT WOS:A1992JF09000004 ER PT J AU GUNTER, AC AF GUNTER, AC TI MESOPOTAMIAN RELIGIOUS ARCHITECTURE - ALEXANDER THROUGH THE PARTHIANS - DOWNEY,SB SO JOURNAL OF NEAR EASTERN STUDIES LA English DT Book Review RP GUNTER, AC (reprint author), SMITHSONIAN INST,ARTHUR M SACKLER GALLERY & FREER GALLERY ART,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0022-2968 J9 J NEAR EASTERN STUD JI J. Near East. Stud. PD JUL PY 1992 VL 51 IS 3 BP 227 EP 228 DI 10.1086/373562 PG 2 WC Archaeology; Asian Studies SC Archaeology; Asian Studies GA JG120 UT WOS:A1992JG12000014 ER PT J AU HOLZENBEIN, S AF HOLZENBEIN, S TI EXPANDABLE PVC COLLAR FOR MARKING AND TRANSMITTER SUPPORT SO JOURNAL OF WILDLIFE MANAGEMENT LA English DT Article AB I developed a new expandable polyvinyl chloride (PVC) collar that marks terrestrial mammals, accommodates enlargement of their necks, and supports a radio transmitter. When tested with a solar-powered transmitter on male white-tailed deer (Odocoileus virginianus), the collar functioned properly for greater-than-or-equal-to 22 months. The size and the tension of the collar can be modified for a variety of terrestrial mammals and transmitter types. RP HOLZENBEIN, S (reprint author), SMITHSONIAN INST,NATL ZOOL PK,CTR CONSERVAT & RES,FRONT ROYAL,VA 22630, USA. NR 7 TC 7 Z9 7 U1 2 U2 4 PU WILDLIFE SOC PI BETHESDA PA 5410 GROSVENOR LANE, BETHESDA, MD 20814-2197 SN 0022-541X J9 J WILDLIFE MANAGE JI J. Wildl. Manage. PD JUL PY 1992 VL 56 IS 3 BP 473 EP 476 DI 10.2307/3808861 PG 4 WC Ecology; Zoology SC Environmental Sciences & Ecology; Zoology GA JE904 UT WOS:A1992JE90400009 ER PT J AU WASHBURN, WE AF WASHBURN, WE TI THE 'LIBRO DE LAS PROFECIAS' OF COLUMBUS,CHRISTOPHER - WEST,DC, KLING,A, EDITORS SO MANUSCRIPTA LA English DT Book Review RP WASHBURN, WE (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU ST LOUIS UNIV PI ST LOUIS PA PIUS XII MEMORIAL LIBRARY 3650 LINDELL BLVD, ST LOUIS, MO 63108 SN 0025-2603 J9 MANUSCRIPTA JI Manuscripta PD JUL PY 1992 VL 36 IS 2 BP 143 EP 145 PG 3 WC History; Literature SC History; Literature GA LJ221 UT WOS:A1992LJ22100008 ER PT J AU DAVIS, AM MACPHERSON, GJ AF DAVIS, AM MACPHERSON, GJ TI SPINEL-RICH INCLUSIONS IN THE MIGHEI C2 CHONDRITE SO METEORITICS LA English DT Meeting Abstract C1 UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637. SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. NR 4 TC 2 Z9 2 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 212 EP 213 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900035 ER PT J AU DODD, RT AF DODD, RT TI H-CHONDRITE AND L-CHONDRITE CLUSTERS AND STREAMS SO METEORITICS LA English DT Meeting Abstract C1 SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794. AMER MUSEUM NAT HIST,DEPT MINERAL,NEW YORK,NY 10024. MUSEUM NAT HIST,SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC. NR 0 TC 4 Z9 4 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 214 EP 215 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900040 ER PT J AU MACPHERSON, GJ DAVIS, AM ZINNER, EK AF MACPHERSON, GJ DAVIS, AM ZINNER, EK TI DISTRIBUTION OF AL-26 IN THE EARLY SOLAR-SYSTEM - A REAPPRAISAL SO METEORITICS LA English DT Meeting Abstract ID ALLENDE C1 SMITHSONIAN INST, DEPT MINERAL SCI, WASHINGTON, DC 20560 USA. UNIV CHICAGO, ENRICO FERMI INST, CHICAGO, IL 60637 USA. WASHINGTON UNIV, MCDONNELL CTR SPACE SCI, ST LOUIS, MO 63130 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 253 EP 254 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900121 ER PT J AU MACPHERSON, GJ DAVIS, AM AF MACPHERSON, GJ DAVIS, AM TI EVOLUTION OF A VIGARANO FORSTERITE-BEARING CAI SO METEORITICS LA English DT Meeting Abstract ID ALLENDE METEORITE; INCLUSIONS C1 SMITHSONIAN INST, DEPT MINERAL SCI, WASHINGTON, DC 20560 USA. UNIV CHICAGO, ENRICO FERMI INST, CHICAGO, IL 60637 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 253 EP 253 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900120 ER PT J AU MARVIN, UB AF MARVIN, UB TI THE METEORITICAL QUINCENTENNIAL - THE STONE OF ENSISHEIM 1492-1992 SO METEORITICS LA English DT Meeting Abstract C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 6 TC 0 Z9 0 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 255 EP 256 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900125 ER PT J AU PETAEV, MI ZASLAVSKAYA, NI CLARKE, RS OLSEN, EJ JAROSEWICH, E KONONKOVA, NN HOLMBERG, BB DAVIS, AM USTINOV, VI WOOD, JA AF PETAEV, MI ZASLAVSKAYA, NI CLARKE, RS OLSEN, EJ JAROSEWICH, E KONONKOVA, NN HOLMBERG, BB DAVIS, AM USTINOV, VI WOOD, JA TI THE CHAUNSKIJ METEORITE - MINERALOGICAL, CHEMICAL AND ISOTOPE DATA, CLASSIFICATION AND PROPOSED ORIGIN SO METEORITICS LA English DT Meeting Abstract C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. VI VERNADSKY GEOCHEM ANALYT CHEM INST, MOSCOW 117975, USSR. SMITHSONIAN INST, WASHINGTON, DC 20560 USA. UNIV CHICAGO, DEPT GEOPHYS SCI, CHICAGO, IL 60637 USA. UNIV CHICAGO, ENRICO FERMI INST, CHICAGO, IL 60637 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 276 EP 277 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900172 ER PT J AU PETAEV, MI AF PETAEV, MI TI METEORITE STERLITAMAK - A NEW CRATER FORMING FALL SO METEORITICS LA English DT Meeting Abstract C1 HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. VI VERNADSKY GEOCHEM ANALYT CHEM INST, MOSCOW 117975, USSR. NR 3 TC 0 Z9 0 U1 0 U2 1 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUL PY 1992 VL 27 IS 3 BP 276 EP 276 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JE029 UT WOS:A1992JE02900171 ER PT J AU STEINER, C AF STEINER, C TI CONTROLLING YOUR IMAGES + THE MUSEUM AND THE LICENSING OF IMAGING PRODUCTS SO MUSEUM NEWS LA English DT Article RP STEINER, C (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC MUSEUMS PI WASHINGTON PA 1575 EYE ST, NW, STE 400, WASHINGTON, DC 20005 SN 0027-4089 J9 MUSEUM NEWS JI Mus. News PD JUL-AUG PY 1992 VL 71 IS 4 BP 62 EP 64 PG 3 WC Art SC Art GA JA589 UT WOS:A1992JA58900016 ER PT J AU MANN, RW KEENLEYSIDE, A AF MANN, RW KEENLEYSIDE, A TI DEVELOPMENTAL LINGUAL DEFECTS ON THE MANDIBULAR RAMUS SO ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS LA English DT Editorial Material ID BONE DEPRESSION C1 MCMASTER UNIV,DEPT ANTHROPOL,HAMILTON L8S 4L8,ONTARIO,CANADA. RP MANN, RW (reprint author), SMITHSONIAN INST,DEPT ANTHROPOL,NHB MAIL STOP 112,WASHINGTON,DC 20560, USA. NR 7 TC 126 Z9 126 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 1079-2104 J9 ORAL SURG ORAL MED O JI Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod. PD JUL PY 1992 VL 74 IS 1 BP 124 EP 126 DI 10.1016/0030-4220(92)90226-G PG 3 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA JD623 UT WOS:A1992JD62300022 PM 1508497 ER PT J AU KWONG, VHS FANG, Z JIANG, Y GIBBONS, TT GARDNER, LD AF KWONG, VHS FANG, Z JIANG, Y GIBBONS, TT GARDNER, LD TI MEASUREMENT OF THERMAL-ENERGY CHARGE-TRANSFER RATE COEFFICIENT OF MO6+ AND ARGON SO PHYSICAL REVIEW A LA English DT Article ID ELECTRON-CAPTURE; HYDROGEN-ATOMS; IONS; COLLISIONS AB The charge-transfer rate coefficient of Mo6+ and argon has been measured at mean ion energies of 8.8 and 1.4 eV using a laser-ablation ion source and an ion trap. The rate coefficient deduced from these measurements is 1.02(0.10) x 10(-10) cm3 s-1 and appears to be independent of the mean ion energy at this energy range. However, the measured value is an order of magnitude smaller than the Langevin rate coefficient. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP KWONG, VHS (reprint author), UNIV NEVADA,DEPT PHYS,4505 MARYLAND PKWY,LAS VEGAS,NV 89154, USA. NR 20 TC 14 Z9 18 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JUL 1 PY 1992 VL 46 IS 1 BP 201 EP 205 DI 10.1103/PhysRevA.46.201 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JC558 UT WOS:A1992JC55800026 ER PT J AU BAND, YB JULIENNE, PS AF BAND, YB JULIENNE, PS TI OPTICAL-BLOCH-EQUATION METHOD FOR COLD-ATOM COLLISIONS - CS LOSS FROM OPTICAL TRAPS SO PHYSICAL REVIEW A LA English DT Article ID STATE MULTIPOLE MOMENTS; RADIATION REACTION; FREQUENCY-SHIFTS; LIGHT; SYSTEMS AB We develop an optical-Bloch-equation approach for modeling ultracold-atom collisions in optical traps. The method incorporates a molecular picture of the atomic collision, laser-field dressing of the molecular states participating in the dynamics, and decay of the population and polarization due to spontaneous emission of excited states. The last is important to incorporate because the duration of the cold collisions is longer than the excited state lifetimes. The relative motion of the atoms during the course of the collision is treated semiclassically with corrections for the time-dependent relative motion of the atoms in the various channels. An application of the method to Cs trap loss due to fine-structure-changing collisions is presented. Good agreement with experiment is obtained. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. NATL INST STAND & TECHNOL,DIV MOLEC SPECT,GAITHERSBURG,MD 20899. RP BAND, YB (reprint author), BEN GURION UNIV NEGEV,DEPT CHEM,IL-84105 BEER SHEVA,ISRAEL. RI Julienne, Paul/E-9378-2012 OI Julienne, Paul/0000-0002-5494-1442 NR 41 TC 47 Z9 47 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JUL 1 PY 1992 VL 46 IS 1 BP 330 EP 343 DI 10.1103/PhysRevA.46.330 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA JC558 UT WOS:A1992JC55800045 ER PT J AU BOWEN, WD OFTEDAL, OT BONESS, DJ AF BOWEN, WD OFTEDAL, OT BONESS, DJ TI MASS AND ENERGY-TRANSFER DURING LACTATION IN A SMALL PHOCID, THE HARBOR SEAL (PHOCA-VITULINA) SO PHYSIOLOGICAL ZOOLOGY LA English DT Article ID HARP SEALS; LEPTONYCHOTES-WEDDELLII; CYSTOPHORA-CRISTATA; MATERNAL INVESTMENT; NEONATAL GROWTH; ELEPHANT SEAL; HOODED SEAL; GROENLANDICA; ENERGETICS; PUPS AB In true seals (family Phocidae), the large energetic costs of lactation are supported primarily by mobilization of stored fat. We studied the magnitude off at and energy depletion in lactating harbor seals (n = 17) on Sable Island, and fat and energy storage in their pups, using cross-sectional morphometric and isotopic methods. Initial mass of mothers studied ranged from 87 to 94 kg. Maternal mass declined by 33% over the first 19 d of the 24-d lactation period. Most of this loss (68.8%) was from the sculp (i.e., skin and attached blubber). Estimated maternal body fat, derived from dilution of deuterium oxide, decreased from 24% at parturition to about 7% at 19 d postpartum. Mothers lost 163 kg (78.7%) of their stored fat and 3.1 kg (20.0%) of stored protein, representing 713.8 MJ (169 Mcal) or 60.5% of stored energy. Newborn pups contained 93.0 MJ (22.1 Mcal) of energy, divided similarly between fat (46.4%) and protein (53.6%). Pup body mass increased from 10.6 kg to 25.8 kg. Sculp mass accounted for 62.7% of mass gained by the pup. Total body fat of pups increased from 11% at birth to 35% at 19 d. Pups deposited 346 8 MJ (82.2 Mcal) or 48.7% of energy withdrawn by females from body stores. Unlike large phocid species, lactating harbor seals initiate feeding during lactation apparently because energy reserves are insufficient to cover the combined costs of lactation and maternal metabolism. C1 SMITHSONIAN INST,WASHINGTON,DC 20008. RP BOWEN, WD (reprint author), FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,DIV MARINE FISH,POB 1006,DARTMOUTH B2Y 4A2,NS,CANADA. RI Bowen, William/D-2758-2012 NR 39 TC 122 Z9 122 U1 1 U2 17 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0031-935X J9 PHYSIOL ZOOL JI Physiol. Zool. PD JUL-AUG PY 1992 VL 65 IS 4 BP 844 EP 866 PG 23 WC Physiology; Zoology SC Physiology; Zoology GA JH670 UT WOS:A1992JH67000010 ER PT J AU KROMBEIN, KV AF KROMBEIN, KV TI SYSTEMATICS OF THE GENERA OF EPYRINAE WITH RAMOSE MALE ANTENNAE (HYMENOPTERA, BETHYLIDAE) SO PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON LA English DT Article DE BETHYLID WASPS; EPYRIS; RAMOSE MALE ANTENNAE; SYSTEMATICS; NEW SPECIES AB The genera of Epyrinae with ramose antennae in the male are reviewed. Calyoza Westwood, 1837, Paracalyoza Cameron, 1909, Calyozella Enderlein, 1920, and Pseudocalyoza Turner, 1915, are new synonyms of Epyris Westwood, 1832. Species described in the first three genera constitute the Staphylinoides species group; the last genus forms the Subramosus species group. Calyozina Enderlein, 1912, is a discrete genus. A neotype is described for Calyoza staphylinoides Hope, the type-species of the genus. Epyris ashmeadi (Enderlein) and E. ramosus (Meunier) are new synonyms of E. staphylinoides (Hope). Epyris niger (Kieffer), E. flavipennis (Turner) and E. bryanti (Turner) are new synonyms of E. hirtipennis (Cameron). Epyris puduma Krombein, n. sp., is described from Sri Lanka. Epyris sumatrensis Krombein, n. name, is proposed for E. flavipennis (Enderlein), 1920, not E. flavipennis (Turner), 1914. Calyozina ramicornis Enderlein is redescribed and figured. RP KROMBEIN, KV (reprint author), SMITHSONIAN INST,DEPT ENTOMOL,NHB STOP 105,WASHINGTON,DC 20560, USA. NR 0 TC 3 Z9 7 U1 0 U2 1 PU ENTOMOL SOC WASHINGTON PI WASHINGTON PA SMITHSONIAN INSTITUTION DEPT ENTOMOLOGY, WASHINGTON, DC 20560 SN 0013-8797 J9 P ENTOMOL SOC WASH JI Proc. Entomol. Soc. Wash. PD JUL PY 1992 VL 94 IS 3 BP 345 EP 360 PG 16 WC Entomology SC Entomology GA JE482 UT WOS:A1992JE48200007 ER PT J AU LIEBHOLD, P AF LIEBHOLD, P TI THE WORKING PEOPLE OF RICHMOND - LIFE AND LABOR IN AN INDUSTRIAL-CITY, 1865-1920 - AT THE VALENTINE-MUSEUM, RICHMOND, VIRGINIA SO TECHNOLOGY AND CULTURE LA English DT Review RP LIEBHOLD, P (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,DIV ENGN & IND,WASHINGTON,DC 20560, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JUL PY 1992 VL 33 IS 3 BP 564 EP 570 DI 10.2307/3106638 PG 7 WC History & Philosophy Of Science SC History & Philosophy of Science GA JM310 UT WOS:A1992JM31000007 ER PT J AU HARWIT, M AF HARWIT, M TI EXPLORING THE SUN - SOLAR SCIENCE SINCE GALILEO - HUFBAUER,K SO TECHNOLOGY AND CULTURE LA English DT Book Review C1 CORNELL UNIV,ASTRON,ITHACA,NY 14853. RP HARWIT, M (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JUL PY 1992 VL 33 IS 3 BP 644 EP 645 DI 10.2307/3106679 PG 2 WC History & Philosophy Of Science SC History & Philosophy of Science GA JM310 UT WOS:A1992JM31000041 ER PT J AU DEVORKIN, D AF DEVORKIN, D TI INVENTING ACCURACY - A HISTORICAL SOCIOLOGY OF NUCLEAR MISSILE GUIDANCE - MACKENZIE,D SO TECHNOLOGY AND CULTURE LA English DT Book Review RP DEVORKIN, D (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JUL PY 1992 VL 33 IS 3 BP 649 EP 652 DI 10.2307/3106682 PG 4 WC History & Philosophy Of Science SC History & Philosophy of Science GA JM310 UT WOS:A1992JM31000044 ER PT J AU KIRBY, K ROSENKRANTZ, ME COOPER, DL AF KIRBY, K ROSENKRANTZ, ME COOPER, DL TI POPULATION OF LONG-LIVED VIBRATIONAL LEVELS OF CO - I(1)SIGMA- AND D(1)DELTA SO PHYSICAL REVIEW LETTERS LA English DT Article ID CARBON-MONOXIDE; METASTABLE STATE; SPECTROSCOPY; TRANSITION; H-2; EXCITATION AB The lowest vibrational energy levels of the I1-SIGMA- and D1-DELTA states of CO, which lie approximately 8 eV above the X1-SIGMA+ ground state, are predicted to have very long radiative lifetimes, in excess of 1 s for electric dipole transitions. These states cannot predissociate and the couplings with levels of the A1-PI state are very small. There is, therefore, the possibility of using the upsilon=0 levels of the I1-SIGMA- and D1-DELTA as reservoirs for highly energetic molecules. In order to encourage experimental studies, methods are proposed for populating the upsilon=0 levels of the I1-SIGMA- and D1-DELTA states, including stimulated emission from the W1-PI state. C1 USAF,ASTRONAUT LAB,EDWARDS AFB,CA 93523. UNIV LIVERPOOL,DEPT CHEM,LIVERPOOL L69 3BX,ENGLAND. RP KIRBY, K (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 28 TC 4 Z9 4 U1 2 U2 4 PU AMERICAN 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 JUN 29 PY 1992 VL 68 IS 26 BP 3865 EP 3868 DI 10.1103/PhysRevLett.68.3865 PG 4 WC Physics, Multidisciplinary SC Physics GA JA760 UT WOS:A1992JA76000012 ER PT J AU WANG, RP THIELEMANN, FK FENG, DH WU, CL AF WANG, RP THIELEMANN, FK FENG, DH WU, CL TI MICROSCOPIC NUCLEAR-MASSES AND THEIR ASTROPHYSICAL IMPLICATIONS SO PHYSICS LETTERS B LA English DT Article ID MODEL AB Highly accurate level densities are predicted using masses derived from the microscopic fermion dynamical symmetry model. New features of this model predict a significantly different location of the astrophysical r-process path in the actinide region from that of the traditional mass model. C1 OAK RIDGE NATL LAB,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. HARVARD UNIV,HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RP WANG, RP (reprint author), DREXEL UNIV,DEPT PHYS & ATMOSPHER SCI,PHILADELPHIA,PA 19104, USA. NR 15 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JUN 25 PY 1992 VL 284 IS 3-4 BP 196 EP 200 DI 10.1016/0370-2693(92)90419-5 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA JD244 UT WOS:A1992JD24400002 ER PT J AU HARWIT, M AF HARWIT, M TI COSMIC CURVATURE AND CONDENSATION SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, THEORY; GALAXIES, FORMATION; RELATIVITY ID BACKGROUND-RADIATION; COSMOLOGICAL PERTURBATIONS; GENERAL-RELATIVITY; CONSTRAINTS; ANISOTROPY; UNIVERSE AB The purpose of this paper is to show that the universe could well consist of a patchwork of domains with different Riemann curvature constants k = 0, +/-1. At early epochs, each individual domain would have been homogeneous, isotropic, and had the same density-rho as all others. But as the universe expanded and curvature effects became significant, k = +1 domains (hereafter designated k +) would collapse to form galaxies and other condensations, while k = 0 or - 1 domains (respectively designated k0 and k-) would continue to expand. For the special case of concentric, spherically symmetric regions, the junction conditions at the interface between domains are relatively straightforward and make good physical sense. Their importance lies in providing a natural way to understand the formation of galaxies and voids. By applying techniques first pioneered by Einstein & Strauss and Schucking, a spherical domain with k+ can be fitted into a domain of k-. Initially, when the universe is very young, the two domains expand jointly and remain contiguous. At that epoch curvature effects are negligible. Later, as the universe continues to evolve and curvature effects become significant, a spherical vacuole forms around the central sphere and increasingly separates the two domains. The interior sphere eventually-collapses and forms a condensation, a galaxy, a cluster, or a black hole, while the vacuole and the external universe both continue to expand. By analogy to the "swiss cheese" models of Einstein & Strauss, the universe can be populated by such condensations embedded in an ambient expanding medium. Formation of condensations is then biased toward k+ domains. We assume that all the domains initially have identical scale factors, R, although different curvature constants, k0, k-, or k+. We show how this assumption, in principle, can be tested observationally. We postulate, and explore in some detail, features of a phase transition in which flat space breaks up in a transition 2k0 double-line arrow pointing left and right k- + k+ with initial scale factors R- = R+. We show that such a transition is energetically permitted, has the equivalent of a Curie temperature, and can lead in a natural way to the formation of voids an galaxies. A prediction which emerges is that, if the ambient universe on average is well fitted by a purely k- space, with only occasional domains of k+ containing galaxies, we should expect a density parameter-OMEGA-0 approximately [A(z(c) + 1)]-1, where z(c) represents the redshift of the earliest objects to have condensed, and A takes on values ranging from approximately 5 to 3, depending on whether formation of domains having different curvature occurred early or late. Present observations, on quasars, therefore, would suggest respectively that OMEGA-0 approximately 0.03 or 0.05, but it could be lower if earlier condensation took place. RP HARWIT, M (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,ASTROPHYS LAB,WASHINGTON,DC 20560, USA. NR 22 TC 8 Z9 8 U1 0 U2 0 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 20 PY 1992 VL 392 IS 2 BP 394 EP 402 DI 10.1086/171438 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HY145 UT WOS:A1992HY14500002 ER PT J AU PETERSON, BM ALLOIN, D AXON, D BALONEK, TJ BERTRAM, R BOROSON, TA CHRISTENSEN, JA CLEMENTS, SD DIETRICH, M ELVIS, M FILIPPENKO, AV GASKELL, CM HASWELL, CA HUCHRA, JP JACKSON, N KOLLATSCHNY, W KORISTA, KT LAME, NJ LEACOCK, RJ LIN, SN MALKAN, MA MONK, AS PENSTON, MV POGGE, RW ROBINSON, A ROSENBLATT, EI SHIELDS, JC SMITH, AG STIRPE, GM SUN, WH TURNER, TJ WAGNER, RM WILKES, BJ WILLS, BJ AF PETERSON, BM ALLOIN, D AXON, D BALONEK, TJ BERTRAM, R BOROSON, TA CHRISTENSEN, JA CLEMENTS, SD DIETRICH, M ELVIS, M FILIPPENKO, AV GASKELL, CM HASWELL, CA HUCHRA, JP JACKSON, N KOLLATSCHNY, W KORISTA, KT LAME, NJ LEACOCK, RJ LIN, SN MALKAN, MA MONK, AS PENSTON, MV POGGE, RW ROBINSON, A ROSENBLATT, EI SHIELDS, JC SMITH, AG STIRPE, GM SUN, WH TURNER, TJ WAGNER, RM WILKES, BJ WILLS, BJ TI STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI .3. FURTHER OBSERVATIONS OF NGC-5548 AT OPTICAL WAVELENGTHS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (NGC-5548); GALAXIES, SEYFERT; QUASARS, EMISSION LINES ID SEYFERT-GALAXIES; QUASARS AB We report on thc results of the second year of an intensive ground-based spectroscopic and photometric study of variability in the bright Seyfert 1 galaxy NGC 5548, which has been undertaken in order to study the relationship between continuum and emission-line variability. Relative to the first year of the monitoring program, the nucleus of NGC 5548 was considerably fainter and the continuum variations slower during the second year, but the continuum-H-beta cross-correlation results for the two years are nearly identical. The variations in the broad H-beta emission line lag behind those in the continuum by somewhat less than 20 days, as concluded from the first year's data. C1 OBSERV PARIS,CNRS,URA 173,F-92195 MEUDON,FRANCE. COLGATE UNIV,DEPT PHYS & ASTRON,HAMILTON,NY 13346. KITT PEAK NATL OBSERV,NATL OPT ASTRON OBSERV,TUCSON,AZ 85726. UNIV MANCHESTER,NUFFIELD RADIO ASTRON LABS,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND. UNIV FLORIDA,DEPT ASTRON,GAINESVILLE,FL 32611. UNIV STERNWARTE GOTTINGEN,W-3400 GOTTINGEN,GERMANY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV MICHIGAN,DEPT ASTRON,ANN ARBOR,MI 48109. UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712. UNIV TEXAS,MCDONALD OBSERV,AUSTIN,TX 78712. NATL CENT UNIV,INST PHYS & ASTRON,32054 CHUNGLI,TAIWAN. UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024. ROYAL GREENWICH OBSERV,CAMBRIDGE CB3 0EZ,ENGLAND. UNIV CAMBRIDGE,INST ASTRON,CAMBRIDGE CB3 0HA,ENGLAND. UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093. OSSERV ASTRON BOLOGNA,I-40126 BOLOGNA,ITALY. NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771. RP PETERSON, BM (reprint author), OHIO STATE UNIV,DEPT ASTRON,174 W 18TH AVE,COLUMBUS,OH 43210, USA. RI Stirpe, Giovanna/O-9393-2015 OI Stirpe, Giovanna/0000-0002-3702-8731 NR 13 TC 72 Z9 72 U1 0 U2 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 JUN 20 PY 1992 VL 392 IS 2 BP 470 EP 484 DI 10.1086/171447 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HY145 UT WOS:A1992HY14500011 ER PT J AU TORRELLES, JM GOMEZ, JF ANGLADA, G ESTALELLA, R MAUERSBERGER, R EIROA, C AF TORRELLES, JM GOMEZ, JF ANGLADA, G ESTALELLA, R MAUERSBERGER, R EIROA, C TI THE POWERING SOURCES OF THE MOLECULAR OUTFLOWS IN THE AFGL-437, AFGL-5142, AND AFGL-5157 REGIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, JETS AND OUTFLOWS; ISM, H-II REGIONS; ISM, INDIVIDUAL OBJECTS (AFGL-437, AFGL-5142, AFGL-5157); MASERS ID INFRARED SOURCE GL-437; AMMONIA OBSERVATIONS; DENSE CORES; CLOUDS AB We present VLA 3.6 cm continuum and water maser observations toward the central region of three molecular outflows for which the position of the powering sources was not clearly established: AFGL 437, AFGL 5142, and AFGL 5157. In these regions, continuum and H2O maser emission has been detected near the peak of the associated high-density molecular cores. Our data indicate a close association between the molecular cores, the radio continuum sources, and the H2O masers. On the basis of these results we propose that the ionizing objects of the continuum sources, which can be ZAMS B-type stars, are also powering the molecular outflows. C1 UNIV BARCELONA,DEPT ASTRON & METEOROL,E-08028 BARCELONA,SPAIN. UNIV AUTONOMA MADRID,FAC CIENCIAS,DEPT FIS TEOR,E-28049 MADRID,SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. SOC CATALANA FIS,ASTROFIS LAB,CATALANA,SPAIN. MAX PLANCK INST RADIOASTRON,W-5300 BONN 1,GERMANY. RP TORRELLES, JM (reprint author), CSIC,INST ASTROFIS ANDALUCIA,AP CORREOS 3004,C-SANCHO PANZA S-N,E-18080 GRANADA,SPAIN. RI Gomez, Jose Francisco/D-8392-2016; OI Gomez, Jose Francisco/0000-0002-7065-542X; Torrelles, Jose Maria/0000-0002-6896-6085 NR 21 TC 41 Z9 42 U1 0 U2 0 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 20 PY 1992 VL 392 IS 2 BP 616 EP 621 DI 10.1086/171461 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HY145 UT WOS:A1992HY14500025 ER PT J AU FRANX, M DEZEEUW, T AF FRANX, M DEZEEUW, T TI ELONGATED DISKS AND THE SCATTER IN THE TULLY-FISHER RELATION SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, DISTANCES AND REDSHIFTS; GALAXIES, KINEMATICS AND DYNAMICS; GALAXIES, PHOTOMETRY ID SPIRAL GALAXIES; SURFACE PHOTOMETRY; SUPERCLUSTER; DISTANCES; CLUSTERS; VIRGO AB It is often speculated that the dark halos of spiral galaxies are triaxial or prolate, with the long axis pointing in the plane of the disk. This would produce a potential that is elongated in the plane of the disk. We explore the signatures produced by such deviations from axisymmetry. We find observable effects in the photometry and kinematics of the stars and gas in the disk, if substructure like bars and spiral arms can be ignored. These effects include ellipticity gradients and position angle twists in disks, velocity gradients along the apparent minor axis of the disk, differences between kinematically determined inclinations and photometrically determined inclinations, and systematic residuals in circular orbit fits to the velocity field. Noncircular gas motions produce significant scatter in the Tully-Fisher relation, amounting to 0.46 mag if the ellipticity of the potential in the plane of the disk is 0.10. Thus, small deviations from axisymmetry are sufficient to produce all or most of the observed scatter in the Tully-Fisher relation. The ellipticity of the potential in the plane of the disk must be less than 0.10 and most likely lies in the range 0-0.06. This range corresponds to an ellipticity of the density distribution of the halo between 0 and 0.16, if halos are the dominant mass component. The constraint on the shape of the dark halo is less tight in "maximum disk" models for spiral galaxies, since in these models the disk material significantly circularizes the total potential. These results imply that use of detailed kinematic information may reduce the observed scatter in the Tully-Fisher relation by 0.1 mag or more. C1 HUYGENS LAB,2300 RA LEIDEN,NETHERLANDS. RP FRANX, M (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 28 TC 64 Z9 64 U1 0 U2 0 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 20 PY 1992 VL 392 IS 2 BP L47 EP L50 DI 10.1086/186422 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HY146 UT WOS:A1992HY14600001 ER PT J AU MINSCHWANER, K ANDERSON, GP HALL, LA YOSHINO, K AF MINSCHWANER, K ANDERSON, GP HALL, LA YOSHINO, K TI POLYNOMIAL COEFFICIENTS FOR CALCULATING O-2 SCHUMANN-RUNGE CROSS-SECTIONS AT 0.5CM-1 RESOLUTION SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID BAND OSCILLATOR-STRENGTHS; ABSORPTION-BANDS; PREDISSOCIATION LINEWIDTHS; SPECTROSCOPIC CONSTANTS; HERZBERG CONTINUUM; MOLECULAR-OXYGEN; ISOTOPIC OXYGEN; SPECTRAL RANGE; O-16 O-18; NM AB We have fitted 02 cross sections from 49,000 to 57,000 cm-1 with temperature dependent polynomial expressions, providing an accurate and efficient means of determining Schumann-Runge band cross sections for temperatures 130 5000 angstrom. This shows that the accretion disk is intrinsically quite faint in quiescence, suggesting a very low accretion rate. Yet the fairly blue continuum slope in the vacuum ultraviolet indicates the presence of a small hot object, presumably the white dwarf. The radial velocities at H-alpha indicate a 4.0 hr orbital period, and the infrared light curve appears to show the expected `double-humped" waveform from the distorted secondary. High-speed photometry in the U band reveals a stable periodicity of approximately 1% semiamplitude at a period of 275 s, with some power also in the subharmonic at approximately 550 s. This identifies the star as a member of the "DQ Herculis" class of cataclysmic binary, in which accretion occurs onto a rapidly rotating, magnetized white dwarf. However, the photometric period in blue light, at a time when the star was slightly fainter, was observed to be 266 s, an orbital sideband of the 275 s period. The most likely interpretation is that the shorter period is the true sidereal rotation period, while the synodic period of 275 s appears prominently in the U band due to the contribution of emission lines and the Balmer continuum. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV LEICESTER,DEPT PHYS,LEICESTER LE1 7RH,ENGLAND. JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218. CENT MICHIGAN UNIV,DEPT PHYS,MT PLEASANT,MI 48859. UNIV GEORGIA,DEPT PHYS & ASTRON,ATHENS,GA 30602. RP PATTERSON, J (reprint author), COLUMBIA UNIV,DEPT ASTRON,NEW YORK,NY 10027, USA. NR 45 TC 29 Z9 29 U1 0 U2 0 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 1992 VL 392 IS 1 BP 233 EP 242 DI 10.1086/171421 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HY143 UT WOS:A1992HY14300024 ER PT J AU HOFFMANN, RS AF HOFFMANN, RS TI THE SMITHSONIAN AND SHEEP HUNTING SO SCIENCE LA English DT Letter RP HOFFMANN, RS (reprint author), SMITHSONIAN INST,SCI,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JUN 5 PY 1992 VL 256 IS 5062 BP 1378 EP 1378 DI 10.1126/science.256.5062.1378 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HX337 UT WOS:A1992HX33700002 PM 17791595 ER PT J AU WASHBURN, WE AF WASHBURN, WE TI THE AMERICAN-INDIAN IN WESTERN LEGAL THOUGHT - THE DISCOURSES OF CONQUEST - WILLIAMS,RA SO AMERICAN ANTHROPOLOGIST LA English DT Book Review RP WASHBURN, WE (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ANTHROPOLOGICAL ASSOC PI ARLINGTON PA 4350 NORTH FAIRFAX DRIVE SUITE 640, ARLINGTON, VA 22203 SN 0002-7294 J9 AM ANTHROPOL JI Am. Anthropol. PD JUN PY 1992 VL 94 IS 2 BP 503 EP 504 DI 10.1525/aa.1992.94.2.02a00710 PG 2 WC Anthropology SC Anthropology GA JA531 UT WOS:A1992JA53100071 ER PT J AU ROSENBERGER, AL AF ROSENBERGER, AL TI TRANSFORMED CLADISTICS, TAXONOMY, AND EVOLUTION - SCOTTRAM,NR SO AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY LA English DT Book Review C1 UNIV ILLINOIS,DEPT ANTHROPOL,CHICAGO,IL 60680. RP ROSENBERGER, AL (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0002-9483 J9 AM J PHYS ANTHROPOL JI Am. J. Phys. Anthropol. PD JUN PY 1992 VL 88 IS 2 BP 262 EP 264 DI 10.1002/ajpa.1330880214 PG 3 WC Anthropology; Evolutionary Biology SC Anthropology; Evolutionary Biology GA HU689 UT WOS:A1992HU68900012 ER PT J AU WILLIAMS, M AF WILLIAMS, M TI POETS OF TIN-PAN-ALLEY - FURIA,P SO AMERICAN MUSIC LA English DT Book Review RP WILLIAMS, M (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV ILLINOIS PRESS PI CHAMPAIGN PA 1325 S OAK ST, CHAMPAIGN, IL 61820 SN 0734-4392 J9 AM MUSIC JI Am. Music PD SUM PY 1992 VL 10 IS 2 BP 219 EP 222 DI 10.2307/3051727 PG 4 WC Music SC Music GA JL764 UT WOS:A1992JL76400007 ER PT J AU STANN, CJ AF STANN, CJ TI SOUTH - THE STORY OF SHACKLETON LAST EXPEDITION, 1914-1917 - SHACKLETON,E, KING,P SO AMERICAN NEPTUNE LA English DT Book Review RP STANN, CJ (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PEABODY MUSEUM PI SALEM PA E INDIA MARINE HALL, SALEM, MA 01970 SN 0003-0155 J9 AM NEPTUNE JI Am. Neptune PD SUM PY 1992 VL 52 IS 3 BP 212 EP 213 PG 2 WC History SC History GA JN309 UT WOS:A1992JN30900016 ER PT J AU BOLON, CR SARIN, AV AF BOLON, CR SARIN, AV TI BASTAR BRASSES SO ASIAN ART LA English DT Article C1 SMITHSONIAN INST,ARTHUR M SACKLER GALLERY,WASHINGTON,DC 20560. RP BOLON, CR (reprint author), FREER GALLERY ART,WASHINGTON,DC 20560, USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0894-234X J9 ASIAN ART PD SUM PY 1992 VL 5 IS 3 BP 34 EP 51 PG 18 WC Art SC Art GA JE405 UT WOS:A1992JE40500003 ER PT J AU PELETIER, RF WILLNER, SP AF PELETIER, RF WILLNER, SP TI HOW TRANSPARENT ARE SPIRAL GALAXIES IN THE NEAR-INFRARED SO ASTRONOMICAL JOURNAL LA English DT Article ID DISKS AB Recently it has been suggested that spiral galaxies are opaque in the B band [Valentijn, Nature, 346, 153 (1990)]. We have investigated the dependence of surface brightness on inclination for galaxies in the near-infrared H band, where absorption by dust affects the light to a much lesser extent. By examining large samples with data from the literature, together with some new surface photometry, we find that spirals behave in a semi-transparent way, with face-on absorption in H averaging almost-equal-to 0.10 mag. From near-infrared images we find that the scale height of the dust in spiral galaxies is almost-equal-to 0.5-0.6 times that of the stars. These two results together predict an average optical depth-tau(B) of almost-equal-to 1.0 and a face-on absorption in B of 0.46 mag, considerably larger than, e.g., used by de Vaucouleurs et al [Second Reference Catalog of Bright Galaxies ( 1976) 1. Even though the range of observed surface brightness in B is extremely small (Freeman's law), the range in H is considerable, and Freeman's law is likely to be caused by dust absorption rather than to reflect the constancy of the central surface density of stars in the disk. RP PELETIER, RF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. RI Peletier, Reynier/B-9633-2012 NR 31 TC 44 Z9 44 U1 0 U2 0 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 JUN PY 1992 VL 103 IS 6 BP 1761 EP 1768 DI 10.1086/116193 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HV913 UT WOS:A1992HV91300005 ER PT J AU MAGNANI, L SANDELL, G LADA, EA AF MAGNANI, L SANDELL, G LADA, EA TI A SURVEY OF CH EMISSION IN MOLECULAR OUTFLOWS SO ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES LA English DT Article DE INTERSTELLAR MEDIUM-MOLECULES; RADIO LINES-MOLECULAR; STARS-FORMATION OF ID YOUNG STELLAR OBJECTS; HIGH-RESOLUTION IMAGES; STAR-FORMING REGIONS; HIGH-VELOCITY GAS; BIPOLAR OUTFLOW; CEPHEUS-A; DIFFUSE CLOUDS; INFRARED OBSERVATIONS; RADIO OBSERVATIONS; HYDROGEN EMISSION AB We present the results of a survey of CH hyperfine ground state emission at 3 GHz from thirteen molecular outflows previously studied in CO and other molecular transitions. The CH main line and satellite lines were detected in emission from the ambient cloud in all cases and the main line was detected in at least one of the high-velocity wings in eight of the sources. In two of the outflows, AFGL 2591 and DR21, the CH main line emission extends over 40 km s-1. Although it is not clear why some of the outflows show CH high-velocity wings and others do not, to first order there is a general correlation with the mechanical luminosity of the outflows; the greater the luminosity, the more probable it is that CH wings will be present. In addition, all the outflows which have prominent CH wings are also the sites of shock-excited H-2 emission. The molecular hydrogen mass of the high-velocity wings calculated from the CH data for the eight sources is in all instances larger than the mass obtained from the CO data by factors which range from a few times to four orders of magnitude. This apparent overabundance of CH in high-velocity gas was noted in a previous paper and is confirmed by this work. We suggest that the overabundance of CH in some of the molecular outflows is a result of shock chemistry, although other processes or varying initial conditions in the outflows cannot be ruled out. C1 HAWAII HEADQUARTERS,JOINT ASTRON CTR,HILO,HI 96720. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP MAGNANI, L (reprint author), UNIV GEORGIA,DEPT PHYS & ASTRON,ATHENS,GA 30602, USA. NR 72 TC 3 Z9 3 U1 0 U2 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 SUP JI Astron. Astrophys. Suppl. Ser. PD JUN PY 1992 VL 93 IS 3 BP 509 EP 524 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HW168 UT WOS:A1992HW16800009 ER PT J AU KASHYAP, V ROSNER, R MICELA, G SCIORTINO, S VAIANA, GS HARNDEN, FR AF KASHYAP, V ROSNER, R MICELA, G SCIORTINO, S VAIANA, GS HARNDEN, FR TI MODELING THE STELLAR CONTRIBUTION TO THE GALACTIC COMPONENT OF THE DIFFUSE SOFT-X-RAY BACKGROUND .1. BACKGROUND FLUXES AND NUMBER COUNTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, STELLAR CONTENT; X-RAYS, STARS ID ASTRONOMICAL DATA; MAGELLANIC CLOUD; DWARF STARS; EMISSION; LIMITS AB We estimate the contribution to the diffuse soft X-ray background flux from main-sequence A, F, G, K, and M stars, and RS CVn stars, at various energies ranging from 0.1 to approximately 5 keV, using a combination of a stellar Galaxy model based on optical data, stellar X-ray luminosity functions derived from the full Einstein data base, and a model for X-ray absorption derived from observed hydrogen column densities. We resolve previous discrepancies between earlier estimates of the stellar contribution to the diffuse soft X-ray backgroud and find that this stellar contribution at high Galactic latitudes is less than 3% for photon energies less than 0.3 keV, 3%-17% in the medium-energy M1 and M2 bands (approximately 0.4 to approximately 0.9 keV), and 10%-30% in the higher energy I and J bands (approximately 0.8-2 keV), at a threshold sensitivity for point source detection approximately 10(-10) ergs s(-1) cm-2. At low latitudes, where the estimations are subject to large uncertainties, we estimate a stellar contribution of < 3% below 0.3 keV, 7%-40% in the medium-energy bands, and 27%-70% in the I and J bands. We calculate the change in the magnitude of the diffuse flux arising from stellar emission when this threshold sensitivity is increased and find that the diffuse flux decreases only by a factor of 2 as this sensitivity is increased to approximately 10(-14) ergs s-1 cm-2, and stars that were previously undetected become detections. We show that while dM stars are the major contributors to the diffuse stellar flux, other stellar types contribute as much as 40% of this flux at the higher energies in the passband studied. We show directly that line emission can be used as a diagnostic tool for constraining models of the background emission and explicitly demonstrate the sensitivity of diffuse flux estimates to the characteristics of the adopted models for the emission. Finally, we also find that our calculated log (N)-log (S) curves are consistent with the observed number of detections in the various Einstein surveys. C1 UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637. OSSERV ASTRON PALERMO,I-90134 PALERMO,ITALY. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP KASHYAP, V (reprint author), UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,5640 S ELLIS AVE,CHICAGO,IL 60637, USA. NR 46 TC 19 Z9 19 U1 0 U2 1 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 1992 VL 391 IS 2 BP 667 EP 684 DI 10.1086/171380 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HV512 UT WOS:A1992HV51200024 ER PT J AU WILSON, AS ELVIS, M LAWRENCE, A BLANDHAWTHORN, J AF WILSON, AS ELVIS, M LAWRENCE, A BLANDHAWTHORN, J TI AN X-RAY IMAGE OF THE SEYFERT-GALAXY NGC-1068 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (NGC-1068); GALAXIES, INTERSTELLAR MATTER; GALAXIES, JETS; GALAXIES, NUCLEI; GALAXIES, SEYFERT; X-RAYS, GALAXIES ID NGC 1068; EMISSION; SPECTRUM; KINEMATICS; NUCLEUS; NEARBY; GAS AB We present and discuss an image of NGC 1068 with resolution 4"-5" obtained with the High Resolution Imager on the ROSAT X-ray Observatory in the energy band 0.1-2.4 keV. The map shows a compact nuclear source, circumnuclear extended (diameter congruent-to 1.5 kpc) emission, and emission on a scale (diameter almost-equal-to 13 kpc) similar to the starburst disk. The circumnuclear emission extends preferentially toward the NE, the same direction as found in several other wavebands. We favor thermal emission from a hot (106-7 K), outflowing wind as the source of the nuclear and circumnuclear emission. This hot gas has a similar pressure to that of the optical line-emitting filaments in the lower density narrow-line region, and may be responsible for their confinement. The large-scale X-rays are probably dominated by emission from the starburst disk, although a contribution from an extension of the nucleus-driven wind to large radii is possible. The X-ray spectrum of the starburst disk is found to be harder than that of the nucleus. Emission from the starburst, rather than the electron-scattered Seyfert nucleus, may be responsible for much of the hard spectrum emission from NGC 1068 in the 2-10 keV band. Recent modeling of the electron-scattering cone in this galaxy has required the optical depth to photoelectric absorption near 1 keV to be less-than-or-equal-to 1, but this constraint is unnecessary if most of the X-ray emission comes from spatial scales comparable to the starburst and the narrow-line region. C1 SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. UNIV LONDON,QUEEN MARY & WESTFIELD COLL,DEPT PHYS,LONDON E1 4N2,ENGLAND. RICE UNIV,DEPT SPACE PHYS & ASTRON,HOUSTON,TX 77251. RP WILSON, AS (reprint author), UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742, USA. NR 30 TC 107 Z9 107 U1 0 U2 0 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 1992 VL 391 IS 2 BP L75 EP L79 DI 10.1086/186402 PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HV513 UT WOS:A1992HV51300007 ER PT J AU FABBIANO, G KIM, DW TRINCHIERI, G AF FABBIANO, G KIM, DW TRINCHIERI, G TI AN X-RAY CATALOG AND ATLAS OF GALAXIES SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE ATLASES; CATALOGS; GALAXY, STRUCTURE; X-RAYS, GALAXIES ID IC-4296 PKS 1333-33; STATISTICAL-ANALYSIS; SPIRAL GALAXIES; EINSTEIN OBSERVATIONS; ELLIPTICAL GALAXIES; SPECTRAL PROPERTIES; VIRGO CLUSTER; EMITTING GAS; HOT CORONAE; CENTAURUS-A AB We present an X-ray catalog and atlas of galaxies observed with the Einstein Observatory imaging instruments (IPC and HRI). The catalog comprises 493 galaxies, including targets of pointed observations, and RSA or RC2 galaxies serendipitously included in Einstein fields. A total of 450 of these galaxies were imaged well within the instrumental fields, resulting in 238 detections and 212 3 sigma-upper limits. The other galaxies were either at the edge of the visible field of view or confused with other X-ray sources. For these we also give a rough measure of their X-ray emission. The atlas shows X-ray contour maps of detected galaxies superposed on optical photographs and gives azimuthally averaged surface brightness profiles of galaxies detected with high signal-to-noise ratio. C1 OSSERV ASTROFIS ARCETRI,I-50125 FLORENCE,ITALY. RP FABBIANO, G (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 68 TC 431 Z9 431 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD JUN PY 1992 VL 80 IS 2 BP 531 EP 644 DI 10.1086/191675 PG 114 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HV354 UT WOS:A1992HV35400003 ER PT J AU KIM, DW FABBIANO, G TRINCHIERI, G AF KIM, DW FABBIANO, G TRINCHIERI, G TI THE X-RAY-SPECTRA OF GALAXIES .1. SPECTRAL FITS OF INDIVIDUAL GALAXIES AND X-RAY COLORS SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE X-RAYS, GALAXIES ID EMISSION AB We have systematically investigated the X-ray spectra of normal galaxies, by using the Imaging Proportional Counter (IPC) data in the Einstein data bank. In addition to the standard model fitting technique, we introduce X-ray colors in order to extract spectral information from the fainter X-ray sources. We present spectral parameters for 43 galaxies and X-ray colors for 127 galaxies. C1 OSSERV ASTROFIS ARCETRI,FLORENCE,ITALY. RP KIM, DW (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 30 TC 64 Z9 64 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD JUN PY 1992 VL 80 IS 2 BP 645 EP 681 DI 10.1086/191676 PG 37 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HV354 UT WOS:A1992HV35400004 ER PT J AU DONOGHUE, AM HOWARD, JG BYERS, AP GOODROWE, KL BUSH, M BLUMER, E LUKAS, J STOVER, J SNODGRASS, K WILDT, DE AF DONOGHUE, AM HOWARD, JG BYERS, AP GOODROWE, KL BUSH, M BLUMER, E LUKAS, J STOVER, J SNODGRASS, K WILDT, DE TI CORRELATION OF SPERM VIABILITY WITH GAMETE INTERACTION AND FERTILIZATION INVITRO IN THE CHEETAH (ACINONYX-JUBATUS) SO BIOLOGY OF REPRODUCTION LA English DT Article ID CAT FOLLICULAR OOCYTES; HEMIZONA ASSAY; DOMESTIC CAT; OVARIAN ACTIVITY; ZONA-PELLUCIDA; EJACULATE; SPERMATOZOA; MATURATION; LEOPARD; BINDING AB Sperm-oocyte interaction in vitro was studied in the cheetah, a species known to produce poor quality ejaculates and to experience low rates of fertility. Twelve female cheetahs were injected (i.m.) with eCG followed by hCG 84 h later. Twenty-four to 26 h post hCG, each was subjected to laparoscopic oocyte aspiration. A sperm motility index (SMI) was calculated for each of 9 cheetah sperm donors that produced ejaculates averaging 41.3 +/- 22.9 x 10(6) motile sperm and 28.4 +/- 4.9% structurally normal sperm. Each ejaculate was used to inseminate cheetah oocytes from 1 or 2 females and salt-stored, domestic cat oocytes. The presence of ovarian follicles (greater-than-or-equal-to 1.5 mm in diameter) showed that all females responded to exogenous gonadotropins (range, 11-35 follicles/female). A total of 277 cheetah oocytes was collected from 292 follicles (94.9% recovery; 23.1 +/- 2.2 oocytes/female). Of these, 250 (90.3%) qualified as mature and 27 (9.7%) as degenerate. Of the 214 mature oocytes inseminated, 56 (26.2%) were fertilized, and 37 (17.3%) cleaved to the 2-cell stage in vitro; but the incidence of in vitro fertilization (IVF) varied from 0 to 73.3% (p < 0.001) among individual males. When oocytes from individual cheetahs (n = 5) were separated into two groups and inseminated with sperm from a male with an SMI > 0 after 6 h coincubation versus an SMI = 0 at this time, the mean fertilization rates were 28/44 (63.6%) and 0/37 (0%), respectively (p < 0.05). Of the 117 domestic cat oocytes coincubated with cheetah sperm, 96.6% contained 1 or more cheetah sperm in the outer half of the zona pellucida (ZP). Although the mean number of cheetah sperm penetrating the outer ZP of the cat ooxyte was similar (p > 0.05) among all males, there was a positive correlation between the number of sperm reaching the inner half of the ZP and fertilization rate in vitro (r = 0.82; p < 0.05). Compared to IVF efficiency in the domestic cat and tiger as reported in earlier studies, IVF efficiency in the cheetah is low. Because oocytes from 11 of 12 cheetahs were fertilized in vitro, there is no evidence that the female gamete is incompetent. Although sperm pleiomorphisms may contribute to poor reproductive performance, examination of the data on the basis of individual sperm donors reveals that effective gamete interaction in the cheetah is dictated, in part, by sperm motility. C1 METRO TORONTO ZOO,TORONTO M1E 4R5,ONTARIO,CANADA. FOSSIL RIM WILDLIFE CTR,GLEN ROSE,TX 76043. WHITE OAK PLANTAT,YULEE,FL 32097. RP DONOGHUE, AM (reprint author), SMITHSONIAN INST,NATL ZOOL PK,DEPT ANIM HLTH,WASHINGTON,DC 20008, USA. FU NCRR NIH HHS [RR 00045]; NICHD NIH HHS [HD 23853] NR 36 TC 70 Z9 71 U1 2 U2 15 PU SOC STUDY REPRODUCTION PI MADISON PA 1603 MONROE ST, MADISON, WI 53711-2021 SN 0006-3363 J9 BIOL REPROD JI Biol. Reprod. PD JUN PY 1992 VL 46 IS 6 BP 1047 EP 1056 DI 10.1095/biolreprod46.6.1047 PG 10 WC Reproductive Biology SC Reproductive Biology GA HV727 UT WOS:A1992HV72700010 PM 1391303 ER PT J AU DUKE, NC M, ZSP AF DUKE, NC M, ZSP TI AGING RHIZOPHORA SEEDLINGS FROM LEAF SCAR NODES - A TECHNIQUE FOR STUDYING RECRUITMENT AND GROWTH IN MANGROVE FOREST SO BIOTROPICA LA English DT Article DE AGE; HEIGHT; INTERNODAL; LIGHT; MANGROVE; NODE; PANAMA; RHIZOPHORA; SEEDLING; SHOOTS AB This paper proposes a rapid and non-destructive technique to age Rhizophora seedlings in the field, using the sequence of leaf nodes along main stems. Based on three- to four-year-old R. mangle seedlings planted in a bay on the Caribbean coast of Panama, it was found that rates of annual node production (=half of leaf production) in the terminal shoot was relatively constant between individuals in the same and similar sites, and for each individual when remeasured three or four times over 19 months. Marked differences, however, were scored between sites under obviously different light conditions, notably in shade (closed canopy) or sun (open canopy); estimates range from 3.8 (SE +/- 0.3) to 7.0 (SE +/- 0.6) nodes-shoot-1.year-1, respectively (note, these were comparable with branch shoots on mature trees nearby). Therefore, neighbouring seedlings in sites with the same light condition could be aged by dividing total counts of main stem nodes by the respective rate. But, of greater interest, seedlings in open sites were found to have annual peaks of internodal extension along their main stems. It followed that seedlings like these could be aged by counting the number of peaks. This provided a more robust means to age seedlings having unknown growth histories, since it did not assume constant annual node production. These characteristics of seedling growth offer a relatively simple means to age individuals, and to quickly characterize demographic patterns in seedling communities. The technique is limited by bark development obscuring nodes on lower stems, occurring after approximately six or more years in R. mangle. Furthermore, because node production was not apparently influenced by age, the technique may also apply to distal branches of larger trees in appropriate light conditions. RP DUKE, NC (reprint author), SMITHSONIAN TROP RES INST,POB 2072,BALBOA,PANAMA. RI Duke, Norman/K-5729-2013 OI Duke, Norman/0000-0003-2081-9120 NR 19 TC 22 Z9 23 U1 1 U2 7 PU ASSN TROP BIOL PI ST LOUIS PA MISSOURI BOTANICAL GARDEN 2345 TOWER GROVE AVE, ST LOUIS, MO 63110 SN 0006-3606 J9 BIOTROPICA JI Biotropica PD JUN PY 1992 VL 24 IS 2 BP 173 EP 186 DI 10.2307/2388671 PN A PG 14 WC Ecology SC Environmental Sciences & Ecology GA JB549 UT WOS:A1992JB54900009 ER PT J AU ROBINSON, MH AF ROBINSON, MH TI GLOBAL CHANGE, THE FUTURE OF BIODIVERSITY AND THE FUTURE OF ZOOS SO BIOTROPICA LA English DT Article DE BIOPARKS; BIODIVERSITY; CONSERVATION; HABITAT LOSS; SPECIES DIVERSITY; ZOO ID DEFORESTATION; BRAZIL RP ROBINSON, MH (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 39 TC 4 Z9 5 U1 0 U2 7 PU ASSN TROP BIOL PI ST LOUIS PA MISSOURI BOTANICAL GARDEN 2345 TOWER GROVE AVE, ST LOUIS, MO 63110 SN 0006-3606 J9 BIOTROPICA JI Biotropica PD JUN PY 1992 VL 24 IS 2 BP 345 EP 352 DI 10.2307/2388528 PN B PG 8 WC Ecology SC Environmental Sciences & Ecology GA JB550 UT WOS:A1992JB55000014 ER PT J AU WARD, DC AF WARD, DC TI THE PAINTING AND POLITICS OF BINGHAM,GEORGE,CALEB - RASH,N SO CIVIL WAR HISTORY LA English DT Book Review RP WARD, DC (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU KENT STATE UNIV PRESS PI KENT PA C/O JOURNALS DEPT, KENT, OH 44242 SN 0009-8078 J9 CIVIL WAR HIST JI Civil War Hist. PD JUN PY 1992 VL 38 IS 2 BP 178 EP 180 PG 3 WC History SC History GA HW676 UT WOS:A1992HW67600007 ER PT J AU BUSH, MB PIPERNO, DR COLINVAUX, PA DEOLIVEIRA, PE KRISSEK, LA MILLER, MC ROWE, WE AF BUSH, MB PIPERNO, DR COLINVAUX, PA DEOLIVEIRA, PE KRISSEK, LA MILLER, MC ROWE, WE TI A 14 300-YR PALEOECOLOGICAL PROFILE OF A LOWLAND TROPICAL LAKE IN PANAMA SO ECOLOGICAL MONOGRAPHS LA English DT Article DE CLIMATE; COOLING; DISTURBANCE; HOLOCENE; LIMNOLOGY; PANAMA; PHYTOLITHS; POLLEN; VEGETATION ID LAST GLACIAL MAXIMUM; POLLEN RECORD; RAIN-FOREST; ENVIRONMENTAL HISTORY; NORTH-AMERICA; AMAZON BASIN; QUATERNARY; FLUCTUATIONS; VEGETATION; CLIMATE AB The first paleoecological analysis of a complete sedimentary record spanning the period from the late Pleistocene to the present from lowland Panama, documents changes in lowland vegetation communities through major climatic change and the onset of human disturbance. Past sympatry is found among presently allopatric species, suggesting that tropical forest communities are not species-stable through time. Late Pleistocene floras at Lake La Yeguada (elevation 650 m), Panama, had high relative abundance of montane forest elements, e.g., Quercus and Magnolia, existing some 900 m below their present range, suggesting a climatic cooling of almost-equal-to 5-degrees-C below present. This descent of montane forest taxa onto lowland hilltops denied the ground to postulated lowland rain forest refugia. The late Pleistocene (14350-11050 yr BP) was not uniformly cool and was interrupted by brief phases of near present-day warming. The onset of the Holocene was abrupt, taking < 100 yr, and was almost coincidental with the start of human forest disturbance. Changes in climate at La Yeguada were found to be largely synchronous with those documented at Lake Valencia, Venezuela, but no fine-scale climatic synchrony was apparent with South American or European sites, and significant departures from the predictions of published climatic circulation models are found. C1 OHIO STATE UNIV,DEPT ZOOL,COLUMBUS,OH 43210. OHIO STATE UNIV,DEPT ANTHROPOL,COLUMBUS,OH 43210. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. OHIO STATE UNIV,DEPT GEOL SCI,COLUMBUS,OH 43210. UNIV CINCINNATI,SCH BIOL SCI,CINCINNATI,OH 45221. RI De Oliveira, Paulo/B-4559-2017; OI De Oliveira, Paulo/0000-0003-1040-4001; Bush, Mark/0000-0001-6894-8613 NR 110 TC 140 Z9 144 U1 3 U2 15 PU ECOLOGICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE, NW, STE 400, WASHINGTON, DC 20036 SN 0012-9615 J9 ECOL MONOGR JI Ecol. Monogr. PD JUN PY 1992 VL 62 IS 2 BP 251 EP 275 DI 10.2307/2937095 PG 25 WC Ecology SC Environmental Sciences & Ecology GA HV571 UT WOS:A1992HV57100004 ER PT J AU SUMMERS, K AF SUMMERS, K TI DART-POISON FROGS AND THE CONTROL OF SEXUAL SELECTION SO ETHOLOGY LA English DT Article ID VARIABLE MATING SYSTEM; PARENTAL CARE; DENDROBATES-PUMILIO; PRUNELLA-MODULARIS; FEMALE COMPETITION; PATERNAL CARE; MATE CHOICE; BEHAVIOR; EVOLUTION; ROLES AB In some species of dart-poison frogs (genus Dendrobates), males perform parental care. Some researchers have suggested that high relative parental investment by males in these species causes sex-role reversal. I argue here that, in general, three factors cause sexual selection: inequality of relative parental investment, variance in mate quality, and variability of parental investment. I review evidence from my previous research that contradicts the hypothesis that unequal relative parental investment can explain female mating strategies in two species of dart-poison frogs with male parental care. I then discuss the hypothesis that variability of male parental investment has an important effect on female mating strategies in these species. C1 UNIV MICHIGAN,MUSEUM ZOOL,ANN ARBOR,MI 48109. SMITHSONIAN TROP RES INST,BALBOA,PANAMA. NR 78 TC 22 Z9 25 U1 0 U2 12 PU BLACKWELL WISSENSCHAFTS-VERLAG GMBH PI BERLIN PA KURFURSTENDAMM 57, D-10707 BERLIN, GERMANY SN 0179-1613 J9 ETHOLOGY JI Ethology PD JUN PY 1992 VL 91 IS 2 BP 89 EP 107 PG 19 WC Psychology, Biological; Behavioral Sciences; Zoology SC Psychology; Behavioral Sciences; Zoology GA JE124 UT WOS:A1992JE12400001 ER PT J AU JANTZ, RL HUNT, DR FALSETTI, AB KEY, PJ AF JANTZ, RL HUNT, DR FALSETTI, AB KEY, PJ TI VARIATION AMONG NORTH AMERINDIANS - ANALYSIS OF BOASS ANTHROPOMETRIC DATA SO HUMAN BIOLOGY LA English DT Article ID CLIMATE; POPULATIONS; ALLOTYPES AB In the late nineteenth century Franz Boas was responsible for assembling anthropometric data from North Amerindians. Approximately 15,000 subjects were measured, but the data have never been systematically analyzed. Here we describe our efforts to develop a computerized database from Boas's data and present the first systematic analysis of these data. In addition to a general analysis of North Amerindian anthropometric variation, we also present a more detailed analysis of anthropometric variation among tribes located in the American Northwest. In the general analysis we find that anthropometric variation is strongly patterned along geographic lines. We examine geographic and language patterning by grouping tribes by culture area and language phylum. Both have high explanatory power, culture area being the higher. The Northwest analysis shows that both language and geographic location are important in explaining anthropometric variation. C1 SMITHSONIAN INST,DEPT ANTHROPOL,WASHINGTON,DC 20560. SUNY STONY BROOK,DEPT ECOL & EVOLUT,STONY BROOK,NY 11794. RP JANTZ, RL (reprint author), UNIV TENNESSEE,DEPT ANTHROPOL,KNOXVILLE,TN 37996, USA. NR 49 TC 32 Z9 33 U1 0 U2 1 PU WAYNE STATE UNIV PRESS PI DETROIT PA 4809 WOODWARD AVE, DETROIT, MI 48201-1309 SN 0018-7143 J9 HUM BIOL JI Hum. Biol. PD JUN PY 1992 VL 64 IS 3 BP 435 EP 461 PG 27 WC Biology; Genetics & Heredity SC Life Sciences & Biomedicine - Other Topics; Genetics & Heredity GA HQ666 UT WOS:A1992HQ66600009 PM 1607187 ER PT J AU LUU, JX JEWITT, DC AF LUU, JX JEWITT, DC TI HIGH-RESOLUTION SURFACE BRIGHTNESS PROFILES OF NEAR-EARTH ASTEROIDS SO ICARUS LA English DT Article ID COMET P/TEMPEL-2; NUCLEUS; ENCKE C1 UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822. RP LUU, JX (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,MS52,CAMBRIDGE,MA 02138, USA. NR 38 TC 32 Z9 32 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD JUN PY 1992 VL 97 IS 2 BP 276 EP 287 DI 10.1016/0019-1035(92)90134-S PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA JD226 UT WOS:A1992JD22600010 ER PT J AU FINN, BS AF FINN, BS TI FRANKLIN,BENJAMIN SCIENCE - COHEN,IB SO ISIS LA English DT Book Review RP FINN, BS (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0021-1753 J9 ISIS JI Isis PD JUN PY 1992 VL 83 IS 2 BP 329 EP 330 DI 10.1086/356152 PG 2 WC History & Philosophy Of Science SC History & Philosophy of Science GA HY339 UT WOS:A1992HY33900048 ER PT J AU WINKER, K RAMOS, MA RAPPOLE, JH WARNER, DW AF WINKER, K RAMOS, MA RAPPOLE, JH WARNER, DW TI A NOTE ON CAMPYLOPTERUS-EXCELLENS IN SOUTHERN VERACRUZ, WITH A GUIDE TO SEXING CAPTURED INDIVIDUALS SO JOURNAL OF FIELD ORNITHOLOGY LA English DT Article AB The Long-tailed Sabrewing (Campylopterus excellens) is a tropical hummingbird endemic to a small area on the Isthmus of Tehuantepec, Mexico. Almost nothing is known about this species. In the Sierra de los Tuxtlas, Veracruz, it appears to prefer tropical rainforest, and did not occur in censuses of local agricultural areas. Male song, displays and ritualized combat are described, and interpecific interactions with the congener C. hemileucurus are noted. A formula for sexing this monochromatic species is offered whereby (wing chord + tail) > 123.9 mm = male and (wing chord + tail) < 120.7 mm = female. Characters that may prove useful in aging individuals are noted. The breeding season is of unknown length, but probably begins before March. C1 US WORLD WILDLIFE FUND,WASHINGTON,DC 20037. NATL ZOOL PK,CTR CONSERVAT & RES,FRONT ROYAL,VA 22630. RP WINKER, K (reprint author), BELL MUSEUM NAT HIST,10 CHURCH ST SE,MINNEAPOLIS,MN 55455, USA. RI Winker, Kevin/M-2042-2014 OI Winker, Kevin/0000-0002-8985-8104 NR 8 TC 3 Z9 3 U1 1 U2 1 PU ASSOC FIELD ORNITHOLOGISTS PI BELOIT PA BELOIT COLLEGE, DEPT BIOLOGY, 700 COLLEGE ST, BELOIT, WI 53511 SN 0273-8570 J9 J FIELD ORNITHOL JI J. Field Ornithol. PD SUM PY 1992 VL 63 IS 3 BP 339 EP 343 PG 5 WC Ornithology SC Zoology GA JJ486 UT WOS:A1992JJ48600014 ER PT J AU BOAZ, NT BERNOR, RL BROOKS, AS COOKE, HBS DEHEINZELIN, J DECHAMPS, R DELSON, E GENTRY, AW HARRIS, JWK MEYLAN, P PAVLAKIS, PP SANDERS, WJ STEWART, KM VERNIERS, J WILLIAMSON, PG WINKLER, AJ AF BOAZ, NT BERNOR, RL BROOKS, AS COOKE, HBS DEHEINZELIN, J DECHAMPS, R DELSON, E GENTRY, AW HARRIS, JWK MEYLAN, P PAVLAKIS, PP SANDERS, WJ STEWART, KM VERNIERS, J WILLIAMSON, PG WINKLER, AJ TI A NEW EVALUATION OF THE SIGNIFICANCE OF THE LATE NEOGENE LUSSO BEDS, UPPER SEMLIKI VALLEY, ZAIRE SO JOURNAL OF HUMAN EVOLUTION LA English DT Article ID PLEISTOCENE; UGANDA; BASIN; KENYA C1 HOWARD UNIV,DEPT ANAT,WASHINGTON,DC 20059. GEORGE WASHINGTON UNIV,DEPT ANTHROPOL,WASHINGTON,DC 20052. SMITHSONIAN INST,DEPT ANTHROPOL,WASHINGTON,DC 20560. INST ROYALE SCI NAT,B-1040 BRUSSELS,BELGIUM. MUSEE ROYAL AFR CENT,B-3080 TERVUREN,BELGIUM. AMER MUSEUM NAT HIST,DEPT VERTEBRATE PALEONTOL,NEW YORK,NY 10024. CUNY HERBERT H LEHMAN COLL,DEPT ANTHROPOL,BRONX,NY 10468. NAT HIST MUSEUM,DEPT PALAEONTOL,LONDON SW7 5BD,ENGLAND. RUTGERS STATE UNIV,DEPT ANTHROPOL,NEW BRUNSWICK,NJ 08903. ECKERD COLL,COLLEGIUM NAT SCI,ST PETERSBURG,FL 33733. UNIV IOANNINA,SCH MED,DEPT ANAT,GR-45110 IOANNINA,GREECE. NYU,DEPT ANTHROPOL,NEW YORK,NY 10003. UNIV TORONTO,DEPT ANTHROPOL,TORONTO M5S 1A1,ONTARIO,CANADA. VRIJE UNIV BRUSSELS,KWAR,B-1050 BRUSSELS,BELGIUM. FLORIDA ATLANTIC UNIV,DEPT GEOL,BOCA RATON,FL 33431. SO METHODIST UNIV,SHULER MUSEUM PALEONTOL,DALLAS,TX 75275. RP BOAZ, NT (reprint author), GEORGE WASHINGTON UNIV,INT INST HUMAN EVOLUT RES,ASHBURN,VA 22011, USA. RI Verniers, Jacques/B-8024-2009 OI Verniers, Jacques/0000-0002-2939-7684 NR 43 TC 17 Z9 18 U1 1 U2 6 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0047-2484 J9 J HUM EVOL JI J. Hum. Evol. PD JUN PY 1992 VL 22 IS 6 BP 505 EP 517 DI 10.1016/0047-2484(92)90083-L PG 13 WC Anthropology; Evolutionary Biology SC Anthropology; Evolutionary Biology GA HZ163 UT WOS:A1992HZ16300005 ER PT J AU BUSH, M AF BUSH, M TI REMOTE DRUG DELIVERY SYSTEMS SO JOURNAL OF ZOO AND WILDLIFE MEDICINE LA English DT Review DE REMOTE DRUG DELIVERY SYSTEM; PROJECTILE DARTS; CROSSBOW-DELIVERED DARTS; POLE SYRINGE; BLOW GUN; IMMOBILIZATION ID PROJECTILE SYRINGES; MAMMALS; DART AB It is important to realize that many of the advances in the broad field of zoological medicine are directly related to the development, refinement, and use of remote drug delivery systems (RDDS). The RDDS of today have an interesting history. The early prototypes with their successes and failures provided insight to the function of current RDDS and the inherent pitfalls and dangers of their use. Although the early crude systems were plagued with problems such as accuracy, limited range, and incomplete injection, they did allow veterinarians to anesthetize and treat free-ranging species. These early limited successes stimulated further development and refinement of the projectile darts and their delivery systems. The continual challenge is to refine RDDS to increase the efficiency of their function (longer range, increased accuracy, more dependable, less trauma, etc.). The RDDS user must develop proficiency and competence through understanding the basic principles and functions of the projectile dart and its delivery system. Practice is needed to insure the safety of the patient and surrounding personnel. RP BUSH, M (reprint author), SMITHSONIAN INST,NATL ZOOL PK,WASHINGTON,DC 20008, USA. NR 84 TC 18 Z9 21 U1 0 U2 1 PU AMER ASSOC Z00 VETERINARIANS PI MEDIA PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063 SN 1042-7260 J9 J ZOO WILDLIFE MED JI J. Zoo Wildl. Med. PD JUN PY 1992 VL 23 IS 2 BP 159 EP 180 PG 22 WC Veterinary Sciences SC Veterinary Sciences GA JF842 UT WOS:A1992JF84200002 ER PT J AU BORDEN, CM STINE, JK ZIMMER, EA AF BORDEN, CM STINE, JK ZIMMER, EA TI EDITED EXCERPTS FROM A SMITHSONIAN SEMINAR SERIES .2. THE SCIENCES SO KNOWLEDGE-CREATION DIFFUSION UTILIZATION LA English DT Article AB In the second of three excerpts from seminars on collaborative knowledge generation in the arts, the sciences, and the humanities, a historian and biologist explore the special circumstances for science. Jeffrey K. Stine describes the historical trends of collaborative work in the sciences and how these changes affect the policy as well as the sociology of science. Elizabeth A. Zimmer outlines the concept of synergistic collaboration, how it works, and how it may be influenced subtly by gender bias. C1 NATL MUSEUM NAT HIST,WASHINGTON,DC 20560. RP BORDEN, CM (reprint author), SMITHSONIAN INST,OFF INTERDISCIPLINARY STUDIES,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0164-0259 J9 KNOWLEDGE PD JUN PY 1992 VL 13 IS 4 BP 399 EP 409 PG 11 WC Social Sciences, Interdisciplinary SC Social Sciences - Other Topics GA HY423 UT WOS:A1992HY42300002 ER PT J AU NEUFELD, MJ AF NEUFELD, MJ TI JOY IN WORK - GERMAN WORK - THE NATIONAL DEBATE, 1800-1945 - CAMPBELL,J SO LABOR HISTORY LA English DT Book Review RP NEUFELD, MJ (reprint author), SMITHSONIAN INST,NATL AIR & SPACE MUSEUM,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK UNIV-TAMIMENT INST PI NEW YORK PA BOBST LIBRARY 70 WASHINGTON SQ SO, NEW YORK, NY 10012 SN 0023-656X J9 LABOR HIST JI Labor Hist. PD SUM PY 1992 VL 33 IS 3 BP 409 EP 410 PG 2 WC History; History Of Social Sciences; Industrial Relations & Labor SC History; Social Sciences - Other Topics; Business & Economics GA JT807 UT WOS:A1992JT80700028 ER PT J AU GALLEGOS, CL JORDAN, TE CORRELL, DL AF GALLEGOS, CL JORDAN, TE CORRELL, DL TI EVENT-SCALE RESPONSE OF PHYTOPLANKTON TO WATERSHED INPUTS IN A SUBESTUARY - TIMING, MAGNITUDE, AND LOCATION OF BLOOMS SO LIMNOLOGY AND OCEANOGRAPHY LA English DT Article ID RHODE RIVER; ESTUARY; DISCHARGE; CHLOROPHYLL; COASTAL; COEFFICIENTS; ECOSYSTEMS; NUTRIENTS; DYNAMICS; BIOMASS AB Subestuaries receive direct runoff from a local watershed and exchange water at their mouth with a mainstem estuary. For subestuaries close to the headwaters of the mainstem estuary, the potential exists for a single rainfall event to supply nutrients to the subestuary on two time scales corresponding to arrival of flow from the two sources. We present a model of phytoplankton blooms based on the Rhode River-Muddy Creek subestuary of Chesapeake Bay which indicates that nutrient inputs from local sources should be capable of producing blooms of small scale and short duration, whereas influx from the mainstem estuary causes blooms of greater extent. Phytoplankton dynamics were simulated with a modification of models for nutrient-saturated standing crop, in which external nutrient inputs were assumed to favor growth of components of the community that have lower loss rates. Field data for two events during late spring and early summer 1989 demonstrated the initiation of blooms by the arrival of freshwater from local and remote sources. As predicted by the model, blooms initiated by the arrival of remote inputs were of larger spatial extent than those triggered by lor-al inputs. RP GALLEGOS, CL (reprint author), SMITHSONIAN ENVIRONM RES CTR,POB 28,EDGEWATER,MD 21037, USA. OI Gallegos, Charles/0000-0001-5112-0166 NR 36 TC 72 Z9 72 U1 0 U2 9 PU AMER SOC LIMNOLOGY OCEANOGRAPH PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044-8897 SN 0024-3590 J9 LIMNOL OCEANOGR JI Limnol. Oceanogr. PD JUN PY 1992 VL 37 IS 4 BP 813 EP 828 PG 16 WC Limnology; Oceanography SC Marine & Freshwater Biology; Oceanography GA JR683 UT WOS:A1992JR68300010 ER PT J AU HOLMBERG, BB HASHIMOTO, A AF HOLMBERG, BB HASHIMOTO, A TI A UNIQUE, (ALMOST) UNALTERED SPINEL-RICH FINE-GRAINED INCLUSION IN KAINSAZ SO METEORITICS LA English DT Article ID ALLENDE METEORITE; ORIGIN AB We report a unique, spinel-rich, extremely porous fine-grained inclusion in the Kainsaz (CO3) meteorite. This inclusion is the least altered fine-grained inclusion yet discovered, having escaped almost entirely the secondary alterations experienced by Allende fine-grained inclusions. The inclusion is comprised of loosely packed 5-30-mu-m spinel grains mantled by thin layers of melilite, anorthite, and diopsidic pyroxene. The inclusion, which has over 30 vol% void space, is one of the most spinel-rich, most porous fine-grained inclusions seen to date. The mineralogy of the inclusion matches that which has been predicted for a precursor of the altered mineral assemblages of Allende fine-grained inclusions, though a lack of interstitial material in the Kainsaz inclusion reduces the likelihood of a direct genetic relationship between the two (Allende fine-grained inclusions contain abundant interstitial material). Its mineralogical composition confirms that the precursors of other, more altered, fine-grained inclusions were assemblages of refractory minerals exclusively. RP HOLMBERG, BB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 17 TC 5 Z9 5 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUN PY 1992 VL 27 IS 2 BP 149 EP 153 PG 5 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JD034 UT WOS:A1992JD03400006 ER PT J AU KROT, AN ZASLAVSKAYA, NI PETAEV, MI KONONKOVA, NN BARSUKOVA, LD KOLESOV, GM AF KROT, AN ZASLAVSKAYA, NI PETAEV, MI KONONKOVA, NN BARSUKOVA, LD KOLESOV, GM TI THE MELNIKOVO LL6 CHONDRITE - A NEW FIND FROM UKRAINE SO METEORITICS LA English DT Note AB Melnikovo is a relatively unweathered 545.6-g LL6 chondrite that was found in 1983. Only a few poorly defined chondrules are discernable in the examined sections; two of these are enriched in chromite. The meteorite contains olivine (Fa27.8), low-Ca pyroxene (Fs24.4), plagioclase, rare clinopyroxene, chlorapatite, merrillite and opaque minerals, which have a modal abundance (in wt%) of troilite (3.9%), kamacite (0.4%), taenite plus tetrataenite (0.7%), chromite (0.8%), and trace amounts of ilmenite and Mn-ilmenite. The meteorite appears unbrecciated on a centimeter scale. C1 HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. VI VERNADSKII GEOCHEM & ANAL CHEM INST,MOSCOW,USSR. RP KROT, AN (reprint author), UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,LOS ANGELES,CA 90024, USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD JUN PY 1992 VL 27 IS 2 BP 182 EP 183 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA JD034 UT WOS:A1992JD03400011 ER PT J AU LORNELL, K AF LORNELL, K TI THE DECCA HILLBILLY DISCOGRAPHY, 1927-1945 - GINELL,C SO NOTES LA English DT Book Review RP LORNELL, K (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MUSIC LIBRARY ASSN PI CATON PA BUSINESS OFFICE PO BOX 487, CATON, MA 02021 SN 0027-4380 J9 NOTES JI Notes PD JUN PY 1992 VL 48 IS 4 BP 1312 EP 1313 DI 10.2307/942155 PG 2 WC Music SC Music GA HX966 UT WOS:A1992HX96600061 ER PT J AU KUNC, JA AF KUNC, JA TI DISSOCIATION-ENERGY OF MOLECULES IN DENSE GASES SO PHYSICAL REVIEW A LA English DT Article ID POTENTIALS; EXCHANGE AB A general approach calculating reduction of the dissociation energy of diatomic molecules immersed in a dense (n < 10(22) cm-3) gas of Molecules and atoms is presented. The dissociation energy of a molecule in a dense gas differs from that of the molecule in vacuum because the intermolecular forces change the intramolecular dynamics of the molecule, and, consequently, the energy of the molecular bond. C1 HARVARD UNIV,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. NR 24 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JUN 1 PY 1992 VL 45 IS 11 BP 7851 EP 7859 DI 10.1103/PhysRevA.45.7851 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HX677 UT WOS:A1992HX67700028 ER PT J AU MYERS, PC MORAN, JM HO, PTP AF MYERS, PC MORAN, JM HO, PTP TI BARRETT,ALAN,H. - OBITUARY SO PHYSICS TODAY LA English DT Item About an Individual RP MYERS, PC (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JUN PY 1992 VL 45 IS 6 BP 97 EP 98 DI 10.1063/1.2809710 PG 2 WC Physics, Multidisciplinary SC Physics GA HY868 UT WOS:A1992HY86800014 ER PT J AU GINGERICH, O AF GINGERICH, O TI GOLDBERG,LEO (JANUARY 26, 1913 NOVEMBER 1, 1987) + IN-MEMORIAM SO PROCEEDINGS OF THE AMERICAN PHILOSOPHICAL SOCIETY LA English DT Item About an Individual RP GINGERICH, O (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER PHILOSOPHICAL SOC PI PHILADELPHIA PA 104 SOUTH FIFTH ST, PHILADELPHIA, PA 19106-3387 SN 0003-049X J9 P AM PHILOS SOC JI Proc. Amer. Philos. Soc. PD JUN PY 1992 VL 136 IS 2 BP 296 EP 301 PG 6 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA JC554 UT WOS:A1992JC55400011 ER PT J AU STANLEY, DJ ARNOLD, D WARNE, AG AF STANLEY, DJ ARNOLD, D WARNE, AG TI OLDEST PHARAONIC SITE SO RESEARCH & EXPLORATION LA English DT Article ID NILE-DELTA; EGYPT; SUBSIDENCE AB Ceramic sherds ranging from late Second Intermediate Period-18th Dynasty (approximately 1600 to 1500 BC) to Ptolemaic (304 to 30 BC) Period were recovered in a sediment boring drilled on the southeastern margin of Burullus lagoon in the Nile delta, Egypt. The sherds appear to be in their original stratigraphic position, and geological analysis of the sedimentary sequences show that these artifacts accumulated along the protected margin of lagoon environments typical of the northern Nile delta during the mid to upper Holocene. Fragments at subsurface depths to 9.4 m are the oldest Pharaonic materials yet encountered in the north-central Nile delta. This site was seasonally flooded by the Sebennitic branch of the Nile. Burial of this site below the water table across the northern Nile delta is the result of lowering of the delta plain surface by tectonic subsidence and compaction, and concomitant eustatic rise in sea level. C1 SMITHSONIAN INST,US NATL MUSEUM NAT HIST,MEDITERRANEAN BASIN,WASHINGTON,DC 20560. METROPOLITAN MUSEUM ART,DEPT EGYPTIAN ART,NEW YORK,NY 10028. NR 28 TC 1 Z9 1 U1 0 U2 0 PU NATL GEOGRAPHIC SOC PI WASHINGTON PA 17TH AND M STS NW, WASHINGTON, DC 20036 SN 8755-724X J9 RES EXPLOR JI Res. Explor. PD SUM PY 1992 VL 8 IS 3 BP 264 EP 275 PG 12 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LD400 UT WOS:A1992LD40000004 ER PT J AU KENNEDY, R AF KENNEDY, R TI JEFFERSON AND THE INDIANS SO WINTERTHUR PORTFOLIO-A JOURNAL OF AMERICAN MATERIAL CULTURE LA English DT Article RP KENNEDY, R (reprint author), SMITHSONIAN INST,NATL MUSEUM AMER HIST,WASHINGTON,DC 20560, USA. NR 33 TC 4 Z9 4 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0084-0416 J9 WINTERTHUR PORTFOLIO JI Winterthur Portfol.-J. Amer. Mater. Cult. PD SUM-FAL PY 1992 VL 27 IS 2-3 BP 105 EP 121 DI 10.1086/496576 PG 17 WC Art SC Art GA KZ861 UT WOS:A1992KZ86100001 ER PT J AU TAYLOR, L AF TAYLOR, L TI IMAGES OF PENANCE, IMAGES OF MERCY - SOUTHWESTERN SANTOS IN THE LATE-19TH-CENTURY - WROTH,W SO WINTERTHUR PORTFOLIO-A JOURNAL OF AMERICAN MATERIAL CULTURE LA English DT Book Review RP TAYLOR, L (reprint author), SMITHSONIAN INST,WASHINGTON,DC 20560, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0084-0416 J9 WINTERTHUR PORTFOLIO JI Winterthur Portfol.-J. Amer. Mater. Cult. PD SUM-FAL PY 1992 VL 27 IS 2-3 BP 192 EP 197 DI 10.1086/496584 PG 6 WC Art SC Art GA KZ861 UT WOS:A1992KZ86100010 ER PT J AU COOKE, R RANERE, AJ AF COOKE, R RANERE, AJ TI PREHISTORIC HUMAN ADAPTATIONS TO THE SEASONALLY DRY FORESTS OF PANAMA SO WORLD ARCHAEOLOGY LA English DT Article ID LAKE VALENCIA; VENEZUELA; MAIZE AB Since 1981 research in the Santa Maria Basin, an area of seasonally dry forest on the Pacific coast of Panama, has shown that collating environmental records with regional archaeological surveys enables us to identify small dispersed populations in New World tropical forests. Original multiple working hypotheses are reevaluated. Data show that: 1) the watershed has been occupied continuously since 11,000 BP; 2) population increases took place c. 7000 and 2500 BP; 3) domestication of some native tubers occurred before 7000 BP; 4) maize, introduced 7000-5000 BP, was extensively cultivated by sedentary communities by 2500 BP; 5) forest degradation took place earlier on stony hillslopes than in flatter colluvial zones; and 6) coastal resources, first visible at 8600 BP, became important between 7000 and 3500 BP. C1 TEMPLE UNIV,DEPT ANTHROPOL,PHILADELPHIA,PA 19122. RP COOKE, R (reprint author), SMITHSONIAN TROP RES INST,ANCON,PANAMA. NR 68 TC 24 Z9 25 U1 0 U2 6 PU ROUTLEDGE PI LONDON PA 11 NEW FETTER LANE, LONDON, ENGLAND EC4P 4EE SN 0043-8243 J9 WORLD ARCHAEOL JI World Archaeol. PD JUN PY 1992 VL 24 IS 1 BP 114 EP 133 PG 20 WC Archaeology SC Archaeology GA HZ851 UT WOS:A1992HZ85100008 ER PT J AU BABB, JF HABS, D SPRUCH, L WOLF, A AF BABB, JF HABS, D SPRUCH, L WOLF, A TI RETARDATION (CASIMIR) ENERGY SHIFTS FOR RYDBERG HELIUM-LIKE LOW-Z IONS - AN EXPLORATORY-STUDY SO ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS LA English DT Article ID LONG-RANGE POTENTIALS; HYDROGEN-LIKE ATOMS; STATES; ELECTRON; SPECTROSCOPY; TRANSITIONS; LIFETIME AB The development of storage rings and electromagnetic traps for heavy charged particles is opening up new regimes of atomic physics, including, in particular, spectroscopic studies of Rydberg helium-like ions - with nuclear charge Z, one electron in the Is state, and one electron in a near-hydrogenic state of high n and l < n, with n and l the principal and orbital quantum numbers, respectively. We consider the possibility of detecting energy shifts due to retardation, DELTA-E(ret) (n, l), Casimir-like effects. These are quantum electrodynamic (QED) retardation effects associated with the finite speed of light. (As opposed to basically kinematic and dynamic QED effects for small quantum numbers n and 1, the appropriate expansion parameter for n and l large for retardation QED corrections is not Z(e2/hc) but [(Z - 1)/n2Z2](h c/e2).) We wish to provide some orientation to those planning experiments in the area, with regard to the choices of n, l, and Z most likely to be able to generate a high-precision confirmation of a retarded interaction. To do so, we provide extensive tables of estimates, for 1 s, nl states, of DELTA-E(ret)(n, l), of radiative widths, and of E, the spin-independent ("electric" fine structure) energy in the absence of retardation shifts, for (nuclear spin zero) ions with Z = 2, 6, 8, 16 and 20. These ions might be experimentally accessible in storage rings, and the Z's are low enough that virtual pair production effects may not yet be significant. There is also a brief survey of possible experimental techniques. C1 UNIV HEIDELBERG,W-6900 HEIDELBERG,GERMANY. MAX PLANCK INST NUCL PHYS,W-6900 HEIDELBERG 1,GERMANY. NYU,DEPT PHYS,NEW YORK,NY 10003. RP BABB, JF (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Babb, James/0000-0002-3883-9501 NR 44 TC 4 Z9 4 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-7683 J9 Z PHYS D ATOM MOL CL JI Z. Phys. D-Atoms Mol. Clusters PD JUN PY 1992 VL 23 IS 3 BP 197 EP 209 PG 13 WC Physics, Atomic, Molecular & Chemical SC Physics GA JB933 UT WOS:A1992JB93300002 ER PT J AU PERIVOLAROPOULOS, L AF PERIVOLAROPOULOS, L TI INSTABILITIES AND INTERACTIONS OF GLOBAL TOPOLOGICAL DEFECTS SO NUCLEAR PHYSICS B LA English DT Article ID MONOPOLES; ORIGIN AB The dynamics of global topological defects are investigated. The stability towards radial rescaling of global monopoles and vortices is verified and virial theorems connecting the potential and gradient energies are obtained. The validity of these theorems is demonstrated numerically. The angular monopole instability first discussed by Goldhaber is also examined. It is shown that even though his are correct, this instability manifests itself as motion of the monopole core rather than unwinding. The interactions of global defects are studied both analytically and numerically. An analytical derivation of their interaction potential is followed by numerical simulation verifying the predicted potential. Using boosted field configurations we demonstrate the existence of critical velocities for defect scattering and annihilation. C1 BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912. RP PERIVOLAROPOULOS, L (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,DIV THEORET ASTROPHYS,MS-51,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Perivolaropoulos, Leandros/0000-0001-9330-2371 NR 12 TC 23 Z9 23 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 25 PY 1992 VL 375 IS 3 BP 665 EP 693 DI 10.1016/0550-3213(92)90115-R PG 29 WC Physics, Particles & Fields SC Physics GA HW621 UT WOS:A1992HW62100007 ER PT J AU VOGELEY, MS PARK, C GELLER, MJ HUCHRA, JP AF VOGELEY, MS PARK, C GELLER, MJ HUCHRA, JP TI LARGE-SCALE CLUSTERING OF GALAXIES IN THE CFA REDSHIFT SURVEY SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, OBSERVATIONS; GALAXIES, CLUSTERING ID COLD DARK MATTER; UNIVERSE AB We use the Center for Astrophysics Redshift Survey, now complete to m(B) less-than-or-equal-to 15.5 over eleven 6-degrees slices, to measure the power spectrum of the galaxy distribution up to wavelengths approximately 200 h-1 Mpc. The combination of large spatial and angular extent with high sampling density allows simultaneous measurement of the power spectrum on both large and small scales. Comparison with large (L greater-than-or-similar-to 400 h-1 Mpc) N-body simulations of cosmological models shows that the power spectrum of the standard CDM model (OMEGA-h = 0.5 and sigma(8) = 1; see below for definitions) is inconsistent with the observed power spectrum at the 99% confidence level. The power spectrum of an open CDM model (OMEGA-h = 0.2 and sigma(8) = 1) best approximates the observed power spectrum for wavelengths < 125 h-1 Mpc. C1 CALTECH, PASADENA, CA 91125 USA. RP HARVARD SMITHSONIAN CTR ASTROPHYS, 60 GARDEN ST, CAMBRIDGE, MA 02138 USA. NR 30 TC 149 Z9 149 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 1992 VL 391 IS 1 BP L5 EP L8 DI 10.1086/186385 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HT592 UT WOS:A1992HT59200002 ER PT J AU CORRELL, DL CLARK, CO GOLDBERG, B GOODRICH, VR HAYES, DR KLEIN, WH SCHECHER, WD AF CORRELL, DL CLARK, CO GOLDBERG, B GOODRICH, VR HAYES, DR KLEIN, WH SCHECHER, WD TI SPECTRAL ULTRAVIOLET-B RADIATION FLUXES AT THE EARTHS SURFACE - LONG-TERM VARIATIONS AT 39-DEGREES-N, 77-DEGREES-W SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID STRATOSPHERIC OZONE DEPLETION; UV-B; IRRADIANCE VARIATIONS; NITROGEN-OXIDES; SOLAR-CYCLE; PHYTOPLANKTON; TRENDS; IMPACT AB Precision measurements of UVB global irradiance in 5-nm-wide spectral bands centered from 290 to 320 nm were made continuously from September 1975 through December 1990. The spectral radiometer was calibrated at roughly monthly intervals. Annual maximum monthly means for total daily radiation, radiation at solar noon, and clear sky radiation at small secants all were observed to be significantly higher during the period from 1983 through 1989. The maximum monthly mean of integrated 295-320 nm total daily radiation in 1986 was 29% above the long-term mean, 47% above the maximum in 1982, and 54% above the mean maxima for 1979-1982. These interannual changes were largest for the shorter wavelengths but were significant for all spectral bands. Interannual variations in clear sky radiation were largest at small secants. For maximum monthly means of integrated 295-320 nm flux, the secant 1.2 maximum in 1989 was 19% above the long-term mean and the average of the maxima during 1983-1989 was 13% above the long-term mean. C1 ENVIRONM RES SOFTWARE, EDGEWATER, MD 21037 USA. RP CORRELL, DL (reprint author), SMITHSONIAN INST, SMITHSONIAN ENVIRONM RES CTR, POB 28, EDGEWATER, MD 21037 USA. NR 46 TC 42 Z9 42 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD MAY 20 PY 1992 VL 97 IS D7 BP 7579 EP 7591 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA HV487 UT WOS:A1992HV48700008 ER EF