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  • 1
    Electronic Resource
    Electronic Resource
    Trace element geochemistry and genesis of the copper ore deposits of the Singhbhum shear zone, Eastern India (1972)
    Springer
    Mineralium deposita 7 (1972), S. 292-313 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Zusammenfassung Als Beitrag zur Klärung der Genese der Kupferlagerstätten in der Singhbhum Shear Zone, Indien, wurden geochemische Untersuchungen an Erzen und Nebengestein durchgeführt. Spurengehalte von Cu, Co, Ni, Pb, Zn, Cd, Ag, Mn, Hg wurden mit Hilfe der AAS bestimmt, ihre Verteilung innerhalb der Zone und der angrenzenden Gesteinstypen wird diskutiert. Auf Grund der vorliegenden geochemischen Daten wird folgende Deutung zur Entstehung der Erzlagerstätten gegeben: Die Bildung der Singhbhum-Erzvorkommen ist das Ergebnis einer Folge langandauernder und sich überschneidender geologischer Prozesse, wie intensiver Scherung, syntektonischer Granitisation und damit verbundener Mobilisierung der oben genannten Elemente. Die präkambrischen Metasedimente und Metavulkanite innerhalb der Scherzone und ihrer näheren Umgebung sind als „Muttergesteine“ der erzbildenden Elemente anzusehen. Die Bildung der Lagerstätte ist das Resultat der Diffusion von Lösungen und ihres Absatzes in physikalisch-chemisch günstigen „Struktur-Fallen“, gebildet im Anschluß an die Scherung.
    Notes: Abstract The genesis of the copper ore deposits of the Singhbhum shear zone, India, has been worked out through a detailed geochemical examination of the ores and the country rocks. Following different techniques of atomic absorption, the abundances of Cu, Co, Ni, Pb, Zn, Cd, Ag, Mn and Hg were determined and the trace element characteristics of the principal rock units in and outside the shear zone have been compiled and critically evaluated. The data suggest that the ore deposits are the result of a sequence of long-continued and over-lapping geological processes culminating in intense shearing, syntectonic granitization and considerable mobilization of the ore elements. The Precambrian metasedimentary and metavolcanic rocks of the shear zone, as well as those enclosing it, served as the source, while diffusion of the ore constituents and their precipitation in physicochemically favourable structural traps, formed in response to shearing, resulted in the formation of the deposits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206791
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  • 2
    Electronic Resource
    Electronic Resource
    Discussions (1973)
    Springer
    Mineralium deposita 8 (1973), S. 204-206 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206131
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Guanylhydrazones with potential antileukemic activity. 1. Aza analogs of 4,4'-diacetyldiphenylurea bis(guanylhydrazone) (1973)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 16 (1973), S. 959-961 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00266a025
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    METABOLISM OF ISOLATED RAT BRAIN PERFUSED WITH GLUCOSE OR MANNOSE AS SUBSTRATE (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 19 (1972), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— After isolated rat brain preparations were perfused with fluid containing either mannose or glucose as metabolic substrate, extracts from the rapidly frozen cerebral cortex were prepared and analysed. Brains perfused with mannose contained somewhat lower levels of glucose-6-phosphate and fructose diphosphate than those perfused with glucose but the contents of other glycolytic intermediates were quite similar in both groups. The level of mannose-6-phosphate was high in brains perfused with either glucose or mannose, but higher in the latter. In both cases, the ratio of mannose-6-phosphate to fructose-6-phosphate was very high, suggesting that phosphomannose isomerase (EC 5.3.1.8) may be important in the regulation of glycolysis. The levels of adenine nucleotides and creatine phosphate and the redox ratios were not significantly different with mannose as substrate than with glucose. The contents of free amino acids in brains perfused with mannose did not differ significantly from those in brains perfused with glucose. Our results show that mannose is a satisfactory substrate for the brain under these experimental conditions since it maintains the energy reserves and oxidative status of the cerebral tissue and does not alter the levels of amino acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1972.tb01453.x
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  • 5
    Electronic Resource
    Electronic Resource
    Enzymes of non-agglutinable vibrios and their possible role in the development of enterotoxic factor (1973)
    Springer
    Cellular and molecular life sciences 29 (1973), S. 903-904 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Sachant que le facteur entérotoxique peut être développé dans les vibrions non-agglutinables par transfer animal, nous avons déterminé les activités enzymatiques (mucinase, protéase, lécithinase) de ces vibrions. Après ce transfert l'activité lécithinasique a augmenté, et cette activité est semblable à celle d'un virus (V. cholerae). Nous supposons que l'augmentation du facteur entérotoxique est causée par celle de l'activité de la lécithinase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946359
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    An input-output matrix as a spatial configuration (1970)
    Springer
    Economic change & restructuring 10 (1970), S. 133-142 
    Details
    ISSN: 1574-0277
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00347047
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Polyanion  -  polycation interactions, 1 (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 169 (1973), S. 273-283 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Wechselwirkung zwischen den basischen Proteinen Lysozym und Ribonuclease einerseits und Polyanionen wie Chondroitinsulfat, DNA oder Inosithexasulfat oder Ferrocyanid andererseits wurde mit Hilfe der Leitfähigkeits- und Trübungsmessung untersucht.Bei den Leitfähigkeits-Titrationen der Polyanionen mit basischen Proteinen wurden bei stöchiometrischen Mengen Knicke in den Kurven erhalten. Zusätzliche Knicke wurden im Falle niedrigerer und höherer Proteinkonzentrationen bei konstanten Mengen an Polyanionen beobachtet. So wurden für das basische Protein Lysozym die beiden Äquivalentgewichte 840 und 1 760 erhalten. Mit DNA zeigte sich jedoch bei einer Konzentration, die höher als die stöchiometrische Menge war, nur ein Knick, was darauf hinweist, daß sämtliche Phosphat-Gruppen der DNA nicht in die Wechselwirkung mit den Proteinen einbezogen sind.Trübungs-Titrationen von Lysozym mit Polyanionen in Wasser, in einer Pufferlösung oder in wäßrigem Äthanol zeigen im allgemeinen einen Knick, und das daraus berechnete Äquivalentgewicht stimmt mit dem höheren Wert überein, der durch Leitfähigkeitsmessung ermittelt wurde. Ribonuclease lieferte bei gleichem pH-Wert und unter denselben Bedingungen eine stärkere Trübung als Lysozym.Daraus wird geschlossen, daß die Wechselwirkung zwischen Polyanion und Polykation nur unter günstigen Bedingungen stochiometrisch ist. Anfänglich erhöhen Salze die durch Polyanion/ Polykation-Wechselwirkung bedingte Trübung und schwächen sie anschließend allmählich ah. In dieser Hinsicht sind zweiwertige Kationen wirksamer als einwertige.
    Notes: The interaction between the basic proteins lysozyme or ribonuclease and polyanions like chondroitin sulphate, DNA or inositol hexasulphate and also ferrocyanide was studied conductometrically and turbidometrically. In the conductometric titrations of the polyanions with basic proteins, breaks in the titration curves were obtained at the stoichiometric amounts. Additional breaks were observed at lower and higher protein concentrations with constant amounts of the polyanions. Thus, two equivalent weights, 840 and 1760, of the basic protein lysozyme were obtained. With DNA, however, only one break was obtained at a concentration higher than the stoichiometric amount, indicating that all the phosphate groups of DNA are not involved in the interaction with the proteins. Turbidometric titrations of lysozyme by the polyanions in water, in a buffer or in aqueous ethanol generally gives one break and the equivalent weight of the protein, calculated from this break, corresponds to the higher value determined conductometrically. Ribonuclease gave higher turbidity than lysozyme under identical conditions of polyanions and pH.It is concluded that interaction between polyanion and polycation is stoichiometric only under favourable conditions. Salts initially increase the turbidity produced by a polyanion/polycation interaction followed by a progressive decrease; in this respect bivalent cations are more effective than monovalent cations.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021690125
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