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  • 1
    Electronic Resource
    Electronic Resource
    Rhodopsin mobility, structure, and lipid-protein interaction in squid photoreceptor membranes (1993)
    s.l. : American Chemical Society
    Biochemistry 32 (1993), S. 3298-3305 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00064a012
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of Gamma-Rays on Dithizone in some Organic Solvents (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 863-864 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Aerated and air-free solutions of dithizone in chloroform, carbon tetrachloride and mixtures of these solvents with ethyl alcohol were irradiated using gamma-rays from a 500-curie cobalt-60 source and a 2-curie antimony-124 source. The yields were determined by ferrous sulphate dosimetry, using 0 o ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/179863a0
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  • 3
    Electronic Resource
    Electronic Resource
    The evaluation of the zeros of ill-conditioned polynomials. Part II (1959)
    Springer
    Numerische Mathematik 1 (1959), S. 167-180 
    Details
    ISSN: 0945-3245
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386382
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  • 4
    Electronic Resource
    Electronic Resource
    Deregulation of Pax-2 expression in transgenic mice generates severe kidney abnormalities (1993)
    [s.l.] : Nature Publishing Group
    Nature 362 (1993), S. 65-67 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The mammalian kidney is induced by a reciprocal interaction between the ureter epithelium and the metanephric mesenchyme, both derived from intermediate mesoderm cells6. This inductive interaction initiates a sequence of morphogenetic changes that begins with the aggregation and polarization of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/362065a0
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  • 5
    Electronic Resource
    Electronic Resource
    Pathway of the Synthesis of Fucose from Glucose in Klebsiella aerogenes (1957)
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 995-995 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A washed suspension containing about 0-5 mgm. total cell nitrogen per ml. of a slime-forming strain of type 54 Klebsiella aerogenes (A3 '$!') was prepared from a nitrogen-deficient solid medium1. It was aerated for 6 hr. at 30 in 250 ml. of a medium containing 0-1 per cent glucose, 0-001 per ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/180995a0
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  • 6
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    M. E. Yapp, "The Near East Since the First World War" (Book Review) (1992)
    London : Periodicals Archive Online (PAO)
    Journal of historical geography. 18:4 (1992:Oct.) 470 
    Details
    ISSN: 0305-7488
    Topics: Geography
    Description / Table of Contents: Other Studies
    Notes: Reviews
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:h349-1992-018-04-000027
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  • 7
    Electronic Resource
    Electronic Resource
    The evaluation of the zeros of ill-conditioned polynomials. Part I (1959)
    Springer
    Numerische Mathematik 1 (1959), S. 150-166 
    Details
    ISSN: 0945-3245
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386381
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  • 8
    Electronic Resource
    Electronic Resource
    An analcime mugearite-megacryst association from north-eastern New South Wales: implications for high-pressure amphibole-dominated fractionation of alkaline magmas (1991)
    Springer
    Contributions to mineralogy and petrology 109 (1991), S. 240-251 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract An analcime-rich mugearite near Spring Mount in north-eastern New South Wales contains dominant kaersutite, lesser anorthoclase and rare Ti-rich mica megacrysts, and also rare Group I peridotite xenoliths and granitoid inclusions. Mineralogical, experimental and Sr and Nd isotopic data are interpreted to indicate that the megacrysts are cognate with their host and that megacryst precipitation occurred at pressures in the vicinity of 1 GPa. Isotopic and other data indicate minimal crystal contamination of the melt. The generation of this ‘evolved’ lava (100 Mg/(Mg+Fe2+), M∼55; differentiation index DI∼52–56) by high-pressure amphiboledominated fractionation of a mantle-derived hydrous alkali basaltic parent (M∼70) is inconsistent with observed megacryst abundances (〈3%) and absence of Group II cumulates, and with the magnitude of the crystal extracts (∼45% crystals) indicated by crystal fractionation models. These data suggest the mugearite is not a high-pressure differentiate of a hypothetical primary parental magma (M≥70). Alternatively, its composition might approximate that of a primary magma derived from a relatively Fe-rich amphibole lherzolite mantle source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306482
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  • 9
    Electronic Resource
    Electronic Resource
    Nephelines and analcimes in some alkaline igneous rocks (1994)
    Springer
    Contributions to mineralogy and petrology 118 (1994), S. 79-91 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The paper presents electron microprobe analyses of nephelines and analcimes in alkaline igneous rocks ranging from theralite and basanite to mugearite and tinguaite. With few exceptions, the nephelines are Si-rich types whose Qz (quartz) components exceed those defining the limits of excess SiO2 in solid solution in the Ne-Ks-Qz-H2O system at 700°C and 1 kbarP H 2 O. Unlike the nephelines in the basanites which show only limited grain-to-grain compositional variation, those in theralites and tinguaites from the differentiated Square Top intrusion, New South Wales, and in a New Zealand tinguaite vary significantly in Ne (nepheline), Ks (kalsilite) and Qz, even within individual samples, and they also may be strongly zoned. The rims of zoned nephelines are enriched in Si and Fe3+, relative to core compositions. These zoning trends contrast with the composional trend of successive “bulk” nepheline fractions in the Square Top sequence theralite → tinguaite whereby Qz decreases. The nephelines coexist with high-temperature alkali feldspars. In the Ne-Ks-Qz system they plot on the Ne side of the Barth compositional join defined by the omission solid solution series with end-members K2Na6Al8Si8O32 (the Buerger ideal composition; Ne75Ks25 mol%) and □2Na6Al2Si10O32 (□=cavity cation vacancy). The compositions of most natural nephelines are restricted to the field defined by Ne and the Barth join, compositions more K-rich than the ideal composition being relatively rare. The compositions of nephelines on the Ne side of the join are controlled by a number of factors which include the physical conditions attending nepheline crystallization and the compositions of the alkaline hosts. Interstitial analcimes from the Square Top intrusion display extensive NaAl⇌Si substitution and their compositions extend from analcime of natrolite composition to compositions slightly more Si-rich than “ideal” NaAlSi2O6. Groundmass analcimes in the basanites, mugearite and New Zealand tinguaite have relatively constant compositions which approach stoichiometric NaAlSi2O6. An unusually Si-rich deuteric analcime (60.2% SiO2) is also present in vugs in the New Zealand tinguaite. Experimental and other evidence, includingP/T data defining the coexistence of analcime and silica-undersaturated silicate melt in the NaAlSiO4-KAlSiO4-SiO2-H2O system, and inferred solidus temperatures of the various hosts (they would have exceeded the stability range of analcime) preclude a primary magmatic origin for the interstitial and groundmass analcimes. These are interpreted as subsolidus phases produced by nepheline interaction with deuteric and/or hydrothermal fluids. Analyses of nephelines and their derivative analcimes indicate that the latter may form from both Si-rich and more Si-poor nephelines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310612
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of substrata on the polarization of bovine endometrial epithelial cells in vitro (1990)
    Springer
    Cell & tissue research 261 (1990), S. 155-161 
    Details
    ISSN: 1432-0878
    Keywords: Endometrium ; Polarity ; Cell culture ; Lectins ; Collagen ; Holstein cow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Epithelial-cell function requires cellular polarity in which apical membrane surfaces have unique characteristics and cellular organelles are stratified. Physiological investigations of endometrial, epithelial cells would be enhanced greatly by the ability of a method to polarize cells in culture. This study investigates the effects of different substrata on polarization of cultured bovine endometrial epithelial cells. Fetal bovine endometrial epithelial-cell lines were developed from explant outgrowth. Epithelial monolayers were subcultured onto amniotic membranes, Millicell-HA membranes, or Millicell-CM membranes coated with rat-tail collagen, Matrigel, laminin, Vitrogen,or fibronectin. Cultures on these substrata were maintained at the air/liquid interface. Cells grown on either collagen-coated or uncoated Milli-cell membranes also were maintained submerged in medium. Excellent polarized morphology was attained in cultures grown at the air/liquid interface on amniotic membranes and rat-tail collagen-coated membranes. Lectin-binding patterns, to apical membranes of polarized epithelial cell cultures paralleled patterns of binding to bovine endometrial surfaces in vivo. Cultures on rat-tail collagen were maintained for several weeks. These methods provide a valuable system for studying the endometrium in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329448
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