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  • Articles: DFG German National Licenses  (7)
  • 1975-1979  (7)
Source
  • Articles: DFG German National Licenses  (7)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 30 (1978), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The oxidation of l-[U-14C]leucine and l-[l-14C]leucine at varying concentrations from 0.1 to 5mM to CO2 and the incorporation into cerebral lipids and proteins by brain slices from 1-week old rats were markedly stimulated by glucose. Although the addition of S mM-dl-3-hydroxybutyrate had no effect on the metabolism of [U-14C]leucine by brain slices from suckling rats, the stimulatory effects of glucose on the metabolism of l-[U-14C]leucine were markedly reduced in the presence of dl-3-hydroxybutyrate. The stimulatory effect of glucose on leucine oxidation was, however, not observed in adult rat brain. Furthermore, the incorporation of leucine-carbon into cerebral lipids and proteins was also very low in the adult brain. The incorporation of l-[U-14C]leucine into cerebral lipids by cortex slices was higher during the first 2 postnatal weeks, which then declined to the adult level. During this time span, the oxidation of l-[U-14C]leucine to CO2 remained relatively unchanged. The incorporation in vivo of D-3-hydroxy[3-14C]butyrate into cerebral lipids was markedly decreased by acute hyperleucinemia induced by injecting leucine into 9-day old rats. In in vitro experiments, 5 mM-leucine had no effect on the oxidation of [U-14C]glucose to CO2 or its incorporation into lipids by brain slices from 1-week old rats. However, 5 mM-leucine inhibited the oxidation of d-3-hydroxy-[3-14C]butyrate, [3-14C]acetoacetate and [1-14C]acetate to CO2 by brain slices, but their incorporation into cerebral lipids was not affected by leucine. In contrast 2-oxo-4-methylvalerate, a deaminated metabolite of leucine, markedly inhibited both the oxidation to CO2 and the incorporation into lipids of labelled glucose, ketone bodies and acetate by cortex slices from 1-week old rats. These findings suggest that the reduction in the incorporation in vivo of d-3-hydroxy[3-14C]butyrate into cerebral lipids in rats injected with leucine is most likely caused by 2-oxo-4-methylvalerate formed from leucine. Since the concentrations of leucine and 2-oxo-4-methylvalerate in plasma of untreated patients with maple-syrup urine disease are markedly elevated, our findings are compatible with the possibility that an alteration in the metabolism of glucose and ketone bodies in the brain may contribute to the pathophysiology of this disease.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of food science & technology 11 (1976), S. 0 
    ISSN: 1365-2621
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Spores of Clostridium botulinum type B (NCTC 7273) were sensitized to the inhibitory action of 2.5% and 3.5% w/w NaCl by heating at 85, 90 or 95°C at pH 6.0 and pH 6.5. Spores heated at 70 or 80°C were not significantly sensitized to these concentrations of NaCl but they were sensitized to 4.5% and 5.5% NaCl. A significant salt-nitrite interaction was observed only at NaCl levels of 4.5% and above. Heat-shocked spores and spores heated through a ‘1-D process’ at 70 or 95°C were more sensitive to nitrite heated in meat or in culture medium (121°/10 min) than to unheated nitrite added after heating. However, no differences in sensitivity to the heated nitrite (Perigo factor) were observed with spores heated at 70 and 95°C.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 28 (1977), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cerebral cortex slices from 1-day old rats incorporated actively 3-hydroxy[3-14C] butyrate into lipids. The rate of synthesis increased moderately during the first postnatal week and then decreased rapidly reaching negligible rates by the end of the fourth postnatal week. The incorporation of [3-14C]acetoacetate (5 mM) and 3-hydroxy[3-14C]butyrate (5 mM) at non-physiological concentrations into lipids by cerebral cortex from 1-week old rats was markedly stimulated in the presence of added glucose; however, the addition of glucose had no effect on the oxidation of ketone bodies to 14CO2 At physiological concentrations of acetoacetate (0.5 mM) and 3-hydroxybutyrate (1 mM), glucose stimulated both the oxidation of ketone bodies to 14CO2 and the incorporation of ketone body-carbon into cerebral lipids. In contrast, the oxidation of [U-14C]glucose to CO2 and its incorporation into lipids by brain slices were markedly reduced in the presence of ketone bodies at physiological as well as non-physiological concentrations. However, the total rate of lipid synthesis, as determined by the incorporation of 3H from 3H2O, was maintained under these conditions. This indicated that the decreased contribution of the acetyl moiety from glucose was compensated to a similar extent by acetyl-CoA formed from ketone bodies. The findings show that both acetoacetate and 3-hydroxybutyrate are better precursors than glucose for in vitros lipid synthesis in developing rat brain.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Water, air & soil pollution 9 (1978), S. 429-431 
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Drinking water samples were collected from different parts of Cambay and were analyzed for alkali metals and trace heavy metals, viz. Na, K, Cu, Zn, Ni, Mn, Co, Pb, Cd, Mg, and Fe. The Pb and Cd concentration was found eight and four times, respectively, greater than the maximum allowable limits. The pH, COD and BOD values are reported.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 12 (1977), S. 829-831 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 80 (1979), S. 171-175 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polymere Metallkomplexe aus 3,3′-Benzidindicarbonsäure und den bivalenten Metallionen Kupfer, Nickel, Kobalt, Zink und Mangan wurden synthetisiert; ihre Eigenschaften, Zusammensetzung, IR-Spektren und magnetische Suszeptibilität wurden untersucht. Die gefärbten, pulvrigen Feststoffe wurden erhalten, indem die Metallacetate und der Ligand im geeigneten Verhältnis ca. 1/2 h am Rückfluß erhitzt und dann bei 110°C getrocknet wurden. Die Produkte sind stabil und in normalen Lösungsmitteln unlöslich.Die analytischen Daten zeigen die allgemeine Formel [ML]n für Cu(II) und Mn(II) an, dagegen die Formel [M4L5]n für Ni(II), Co(II) und Zn(II). Die Art der Koordination des Liganden mit den Metallionen wurde ermittelt durch Vergleich von IR-Spektren des Liganden und des Komplexes. Es wird eine polymere Struktur vorgeschlagen.
    Notes: Polymeric metal complexes of 3,3′-benzidine dicarboxylic acid with bivalent metal ions such as copper, nickel, cobalt, zinc and manganese have been synthesized and their properties, composition, IR-absorption spectra and magnetic susceptibilities were investigated. The coloured, powderly solids were obtained by refluxing the metal acetate and the ligand in the appropriate ratio for about half an hour and dried at 110°C. The compounds are stable and insoluble in common solvents.The analytical data indicate the general formula, [ML]n for Cu(II), Mn(II) and [M4L5]n for Ni(II), Co(II) and Zn(II). The mode of coordination of the ligand with metal ions has been elucidated by comparing IR spectra of the ligand and the complexes. A polymeric structure is proposed for the complexes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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