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  • 1
    Electronic Resource
    Electronic Resource
    Demonstration of Indicator Microorganisms on Surface of Vegetables on the Market in the United States and Mexico (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Presence of indicator microorganisms of fecal pollution on the surface of vegetables sold in retail markets is demonstrated. Vegetables were obtained from local markets in the U.S.A. and Mexico. At least 1 of the indicators, among coliphages, fecal streptococci, total coliforms, and fecal coliforms, was detected in every sample tested. Relatively small amounts of indicators were recovered from the U.S.A. samples. Fecal streptococci showed significant correlations with all other indicators. However, some U.S.A. samples low in fecal streptococci were found to harbor certain levels of other indicators. Upon introduction of an indicator system to detect the fecal contamination of agriculture crops, it is recommended that multiple indicator microorganisms be measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb08733.x
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  • 2
    Electronic Resource
    Electronic Resource
    A 1:1 complex of 4-nitropyridine N-oxide and 3-hydroxybenzoic acid (1999)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 218-220 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270198009949
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of temperature and salinity on the oxygen consumption of laboratory produced Penaeus vannamei postlarvae
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part A: Physiology 108 (1994), S. 331-336 
    Details
    ISSN: 0300-9629
    Keywords: Metabolism ; Oxygen consumption ; White shrimp
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0300-9629(94)90103-1
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  • 4
    Electronic Resource
    Electronic Resource
    Non-explosive, constructional evolution of the ice-filled caldera at Volcán Sollipulli, Chile (1996)
    Springer
    Bulletin of volcanology 58 (1996), S. 67-83 
    Details
    ISSN: 1432-0819
    Keywords: Key words Caldera ; Radar ; Gravity ; Ice ; Subglacial eruptions ; Sollipulli ; Chile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  A radar and gravity survey of the ice-filled caldera at Volcán Sollipulli, Chile, indicates that the intra-caldera ice has a thickness of up to 650 m in its central part and that the caldera harbours a minimum of 6 km3 of ice. Reconnaissance geological observations show that the volcano has erupted compositions ranging from olivine basalt to dacite and have identified five distinct volcanic units in the caldera walls. Pre- or syn-caldera collapse deposits (the Sharkfin pyroclastic unit) comprise a sequence which evolved from subglacial to subaerial facies. Post-caldera collapse products, which crop out along 17 of the 20 km length of the caldera wall, were erupted almost exclusively along the caldera margins in the presence of a large body of intra-caldera ice. The Alpehué crater, formed by an explosive eruption between 2960 and 2780 a. BP, in the southwest part of the caldera is shown to post date formation of the caldera. Sollipulli lacks voluminous silicic pyroclastic rocks associated with caldera formation and the collapse structure does not appear to be a consequence of a large-magnitude explosive eruption. Instead, lateral magma movement at depth resulting in emptying of the magma chamber may have generated the caldera. The radar and gravity data show that the central part of the caldera floor is flat but, within a few hundred metres of the caldera walls, the floor has a stepped topography with relatively low-density rock bodies beneath the ice in this region. This, coupled with the fact that most of the post-caldera eruptions have taken place along the caldera walls, implies that the caldera has been substantially modified by subglacial marginal eruptions. Sollipulli caldera has evolved from a collapse to a constructional feature with intra-caldera ice playing a major role. The post-caldera eruptions have resulted in an increase in height of the walls and concomitant deepening of the caldera with time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004450050127
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  • 5
    Electronic Resource
    Electronic Resource
    Sulphur flows at Lastarria volcano in the North Chilean Andes (1985)
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 778-780 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Lastarria is a small compound andesite-dacite volcano rising from 4,200 to 5,700 m in the Antofagasta Region of northern Chile. Although there is no recorded history of eruptions, fumaroles are conspicuously active on the northwestern flank and at the summit; prominent sulphur flows have been ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/313778a0
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  • 6
    Electronic Resource
    Electronic Resource
    Confirmation of cooperative polyandry in the Galapagos hawk (Buteo galapagoensis) (1995)
    Springer
    Behavioral ecology and sociobiology 36 (1995), S. 83-90 
    Details
    ISSN: 1432-0762
    Keywords: DNA fingerprinting ; Buteo galapagoensis ; Paternity ; Polyandry ; Reproductive success
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Without genetic tests of parentage, descriptions of mating systems must be considered hypothetical. Here we confirm the existence of cooperative polyandry in the Galapagos hawk (Buteo galapagoensis) using multilocus minisatellite DNA fingerprinting. In this species, breeding groups consist of one adult female and from one to eight males (the modal number of males is two). In polyandrous groups, all males copulate with the female and participate in the provisioning of the young. DNA samples from 66 individual hawks from ten breeding groups on the island of Santiago revealed mixed paternity in most groups. Multiple paternity was detected in five of six groups that produced two chicks in one breeding attempt (year). In addition, different males sired young in consecutive years in five of six groups in which male group membership was constant. Patterns of paternity suggest that reproductive success was randomly distributed among males within groups, with males apparently having equivalent probabilities of siring each young. Analysis of genetic similarity indicates that males within groups were typically not close relatives These results demonstrate that the mating system of the Galapagos hawk is polyandrous, with relatively egalitarian relations among unrelated males belonging to the same breeding group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00170712
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  • 7
    Electronic Resource
    Electronic Resource
    Confirmation of cooperative polyandry in the Galapagos hawk (Buteo galapagoensis) (1995)
    Springer
    Behavioral ecology and sociobiology 36 (1995), S. 83-90 
    Details
    ISSN: 1432-0762
    Keywords: Key words DNA fingerprinting ; Buteo galapagoensis ; Paternity ; Polyandry ; Reproductive success
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Without genetic tests of parentage, descriptions of mating systems must be considered hypothetical. Here we confirm the existence of cooperative polyandry in the Galapagos hawk (Buteo galapagoensis) using multilocus minisatellite DNA fingerprinting. In this species, breeding groups consist of one adult female and from one to eight males (the modal number of males is two). In polyandrous groups, all males copulate with the female and participate in the provisioning of the young. DNA samples from 66 individual hawks from ten breeding groups on the island of Santiago revealed mixed paternity in most groups. Multiple paternity was detected in five of six groups that produced two chicks in one breeding attempt (year). In addition, different males sired young in consecutive years in five of six groups in which male group membership was constant. Patterns of paternity suggest that reproductive success was randomly distributed among males within groups, with males apparently having equivalent probabilities of siring each young. Analysis of genetic similarity indicates that males within groups were typically not close relatives. These results demonstrate that the mating system of the Galapagos hawk is polyandrous, with relatively egalitarian relations among unrelated males belonging to the same breeding group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650050127
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  • 8
    Electronic Resource
    Electronic Resource
    Indolalkaloide aus den Blättern von Hedranthera barteri (Hook. f.) PichonTeil der geplanten Dissertation von J. Naranjo, Universität Zürich.. 146. Mitteilung über Alkaloide145. Mitteilung über Alkaloide, vgl. [1]. (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 1849-1866 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: From the leaves of the West African plant (Apocynaceae Hedranthera barteri) has been isolated the phenolic (-)-desmethyl-vobtusine (3), alongside the already known bisindole alkaloids (-)-goziline (1) and (-)-vobtusine (2). The new alkaloid 3 has been spectroscopically characterised and correlated with (-)-vobtusine (2).Furthermore, the ‘monomeric’ alkaloids (-)-hedrantherine (4) and (-)-17-hydroxy-hedran-therine (5) were found in the leaves of H. barteri. Both of these alkaloids contain a cyclic semiacetal group. These bases and their derivatives possessing an unchanged β-anilinoacrylester group show, in the mass spectrometer, the same characteristic fragmentation as vincadifformine (11), whilst their 2,3-dihydroderivatives bear more of a resemblance to aspidospermine. From the strongly negative Cotton effect of 4 and 22 at 300-350 nm follows the absolute configuration in these bases of centre 12.Hedrantherine (4) represents the lower half of the bisindole type of vobtusine bases. The upper half has previously been encountered in form of the alkaloid beninine in the rootbark of H. barteri.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550602
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  • 9
    Electronic Resource
    Electronic Resource
    Über das Alkaloid Lonicerin aus Callichilia barteri.Teil der geplanten Dissertation von J. Naranjo. 137. Mitteilung über Alkaloide136. Mitteilung: [1]. (1970)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 53 (1970), S. 749-754 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The alkaloid lonicerine was isolated from Callichilia barteri (Apocynaceae). By chemical and spectroscopic evidence it could be shown to be 16-epi-aspidodasycarpine (1).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19700530408
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  • 10
    Electronic Resource
    Electronic Resource
    Über die Indolalkaloide von Pleiocarpa talbotii WernhamTeil der geplanten Dissertation von J. Naranjo, Universität Zürich.Zum Teil vorgetragen an der Frühjahrsversammlung der Schweizerischen Chemischen Gesellschaft, 7.-8. 5.1971 Lausanne, vgl. [2].. 145. Mitteilung über Alkaloide144. Mitteilung über Alkaloide, vgl. [1].Herrn Prof. Dr. Ignacio Ribas, Santiago de Compostela, Spanien, zum 70. Geburtstag gewidmet (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 752-771 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Besides talbotine (1) three new indole alkaloids, talpinine (2), talcarpine (3) and 16-epi-affinine (4) were isolated from the stem bark of Pleiocarpa talbotii Wernham. The structure of 2 was deduced by chemical degradation and by analyses of the spectra of the alkaloid and its derivatives. One of these derivatives is identical with talcarpine (3).The structures 2 and 3 are similar to that of macroline (14), a splitting product of the bisindole alkaloid villalstonine from Alstonia species. 16-epi-Affinine (4) was chemically correlated with the known alkaloid vobasine (19).Talpinine (2) and 16-epi-affinine (4) were also isolated from the root bark of Pleiocarpa talbotii.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550304
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