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  • Springer  (59)
  • Wiley  (22)
  • Springer Nature  (11)
  • Geological Society of America (GSA)
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  • 1
    Electronic Resource
    Electronic Resource
    Topological analysis of the charge density response of a Ni4 cluster to a probe H2 molecule (1990)
    Springer
    Journal of cluster science 1 (1990), S. 201-221 
    Details
    ISSN: 1572-8862
    Keywords: Xα calculations ; charge density analyses ; binding energy calculations ; Ni4 ; transition metal clusters ; density function theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Local density self-consistent field (SCF) discrete variationalXα calculations are performed on a Ni4 tetrahedron interacting with a probe H2 molecule in special geometries. Optimized basis functions generated from the spherically averaged SCF potential are used. Topological charge-density analyses and binding energy calculations are used to study a portion of the energy surface for the approach of the H2 molecule toward the Ni4 tetrahedron. The effect of the H2 molecule on Ni-Ni, Ni-H bonds and changes in the H-H covalent bond are investigated with the help of the ∇ρ field and various data at its critical points. The qualitative relationship between these data and the calculated binding energies is exploited.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702720
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  • 2
    Electronic Resource
    Electronic Resource
    Cyst formation in metanephric organ culture induced by cis-dichlorodiammineplatinum (II) (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 74-76 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new experimental model of renal tubular cyst formation has been developed in metanephric organ culture. The addition of cis-dichlorodiammineplatinum (II), 50 μg/ml, to culture medium induces cystic changes during in vitro nephrogenesis. The model has particular utility in the study of basic mechanisms underlying renal tubular cystic changes, as well as the mechanisms by which nephrotoxins may mediate renal tubular injury.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01960636
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  • 3
    Electronic Resource
    Electronic Resource
    Regression of genetically determined polycystic kidney disease in murine organ culture (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 77-80 
    Details
    ISSN: 1420-9071
    Keywords: Polycystic kidney disease ; organ culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cystic kidneys from the mutant CPK strain of C57BL/6J mice were cultured in serum-free organ culture. During 120 h of incubation in chemically-defined medium, CPK cystic tubular changes underwent complete regression. Environmental factors regulate the expression of genetically determined polycystic kidney disease in this model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01975904
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  • 4
    Electronic Resource
    Electronic Resource
    Salivary gland hyperplasia in wild caught tsetse from Zimbabwe (1987)
    Springer
    Entomologia experimentalis et applicata 45 (1987), S. 167-173 
    Details
    ISSN: 1570-7458
    Keywords: Tsetse flies ; Glossina morsitans morsitans ; Glossina pallidipes ; virus ; salivary glands ; hyperplasia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des glandes salivaires hypertrophiées ont été extraites de Glossina morsitans et de G. pallidipes provenant de populations sauvages capturées dans la vallée du Zambèze au Zimbabwe. L'examen des glandes au microscope électronique a montré que la forme du virus associé était identique dans les deux espèces. La fréquence d'hypertrophie des glandes salivaires était significativement plus élevée chez G. pallidipes que chez G. morsitans et la fréquence des glandes hypertrophiées de G. pallidides contaminèes par des organismes ressemblant à des Rickettsia était de 0,02. Rien n'indique à partir de ce petit échantillon que la contamination virale favorise l'infection par des trypanosomes.
    Notes: Abstract Hypertrophied salivary glands were collected from wild populations of the tsetse flies Glossina morsitans morsitans Westwood and G. pallidipes Austen in the Zambezi valley, Zimbabwe. Examination of the glands by electron microscopy showed that the associated virus was identical in form in both species. The incidence of salivary gland hypertrophy was significantly higher in G. pallidipes than in G.m.morsitans, and 83% of the enlarged glands of the former were, in addition, found to be infected with Rickettsia-like organisms. There was no indication from this small sample that viral infections predisposed flies to infections with trypanosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305643
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  • 5
    Electronic Resource
    Electronic Resource
    Pesticide residues in Arizona peregrine falcon eggs and prey (1989)
    Springer
    Bulletin of environmental contamination and toxicology 42 (1989), S. 57-64 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01699204
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  • 6
    Electronic Resource
    Electronic Resource
    Intact organ culture of murine metanephros (1991)
    Springer
    Methods in cell science 13 (1991), S. 163-168 
    Details
    ISSN: 1573-0603
    Keywords: organ culture ; metanephros ; kidney ; immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A murine metanephric whole-organ culture system is described which maintains normal structural relationships of epithelial and mesenchymal elements and undergoes advanced organotypic differentiation in vitro. Manipulation of the culture conditions permits study of the developmental, immunologic, and biochemical aspects of normal and abnormal renal organogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02388120
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  • 7
    Electronic Resource
    Electronic Resource
    A new model of glucocorticoid-induced metanephric maldevelopment (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 489-490 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new experimental model of glucocortocoid-induced tubular cyst formation has been developed in metanephric organ culture. The addition of cortisol (1.4×10−5 M) to chemically defined serum-free culture medium produces cystic changes during in vitro nephrogenesis. The model isolates the role of glucocorticoids in experimental cyst formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952400
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  • 8
    Electronic Resource
    Electronic Resource
    Vacancy and defect structures in metal oxides (1987)
    Springer
    Physics and chemistry of minerals 14 (1987), S. 303-307 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The self-consistent local density (LD) theory is used to model vacancy and defect structures in metal oxides by use of the embedded cluster scheme. LCAO-MO expansions of cluster orbitals are obtained by the DV-Xα discrete variational method, and used to characterize energy levels, charge distributions, X-ray absorption and cohesive energies. Examples are drawn from recent work on transition metal monoxides such as Fe1−x O, ceramic materials such as yttrium-stabilized zirconia, and the alumina/ruby system. It is shown that in addition to predicting spectroscopic properties, LD theory has now reached a stage of implementation where lattice stability and local site geometry can be usefully explored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309801
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  • 9
    Electronic Resource
    Electronic Resource
    High pressure cognate inclusions in the Newer Volcanics of Victoria (1976)
    Springer
    Contributions to mineralogy and petrology 58 (1976), S. 149-180 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract High pressure pyroxene- and amphibole-rich inclusions are found in a number of Victorian Newer Volcanics volcanoes. The host lavas range from nepheline basanite to nepheline hawaiite and nepheline mugearite. The wide variation in chemistry and mineralogy of the inclusions is explained by crystallization from basaltic magmas under varying P-T and PH2O conditions at depth. At moderate pressure wehrlite inclusions (ol+cpx) form, whereas at higher pressures pyroxenites (opx+cpx) and genetically related megacrysts form. Under relatively anhydrous conditions the clinopyroxene megacrysts show a trend of Ca enrichment whereas under hydrous conditions, when amphibole is also stable, the pyroxene shows a trend to greater iron enrichment. The trend nepheline basanite to nepheline mugearite has developed by extensive fractionation of amphibole at elevated pressures under hydrous conditions. Under less hydrous conditions where clinopyroxene assumes the dominant role during crystal fractionation, derivative liquids display a trend of increasing K2O/Na2O ratio, with little modification of their level of undersaturation. Olivine plays a decreasing role in crystal fractionation processes with increasing pressure. The available evidence indicates that the only magma which could have been parental to the observed basanites was a more picritic basanite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382183
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  • 10
    Electronic Resource
    Electronic Resource
    Osumilite-sapphirine-quartz granulites from Enderby Land Antarctica — Mineral assemblages and reactions (1980)
    Springer
    Contributions to mineralogy and petrology 72 (1980), S. 123-143 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The pre-Cambrian granulites of Enderby Land Antarctica, contain coexisting spinel-quartz, sapphirine-quartz, hypersthene-sillimanite-quartz and osumilite on a regional extent. Osumilite is present in a variety of mineral assemblages, most of which are documented in granulites for the first time. The mineral assemblages, reactions and compositional zoning in minerals are discussed in terms of continuous and discontinuous reactions in response to changing conditions of metamorphism. The development of many of the mineral coronas can be explained by continuous rather than discontinuous reactions, due to the effects of Mg-Fe and (Mg,Fe)-2Al exchange equilibria with decreasing temperature. The highest P-T conditions of metamorphism (8–10 kb, 900 °–980 ° C, Ellis, in preparation) were beyond the stability limit of coexisting garnet-cordierite. Secondary cordierite has developed through a large number of mineral reactions in response to cooling of these granulites. A theoretical analysis of the phase relations involving osumilite in the chemical systems K2O-MgO-Al2O3-SiO2 and K2O-MgO-FeO-Al2O3-SiO2 is presented. In the pure Mg-system the lower temperature stability limit of Mg-osumilite is inferred to be defined with increasing pressure by the reactions Os→Cd+En+Kfeld+Qtz, Os→Sa+En+Kfeld+Qtz, Os→Sill+En+Kfeld+Qtz. In iron-bearing systems an important reaction involving osumilite is Os+Gt→Cd+Hy+Kfeld+Qtz. At moderate temperatures and pressures, osumilite is limited to rocks which lie on the Mg-rich side of the Cd-Hy stable tie line on an AFM diagram. At higher pressures and temperatures osumilite occurs in a widerrange of rock compositions because of the stability of coexisting garnet and osumilite. Petrographic data, as well as chemographic relations indicate that for many common rock compositions, garnet, cordierite, hypersthene, sapphirine and sillimanite cannot coexist with both osumilite and K-feldspar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00399473
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