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'Vanadium' in keywords Facet   section ZfN Section C  [X]
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1980 (1)
1978 (3)
1Author    Hans-Ulrich Meisch, JohannesA. Schmitt, Wolfgang ReinleRequires cookie*
 Title    Schwermetalle in Höheren Pilzen, III * Vanadium und Molybdän Heavy Metals in Higher Fungi, III. Vanadium and Molybdenum  
 Abstract    In several series of 212 samples, higher fungi, especially from the genus Amanita and related genera, were analyzed by atomic absorption spectroscopy on their content of the trace metals vanadium and molybdenum. Only vanadium was found to be present in high concentration in the fly agaric mushroom (Amanita muscaria), while 22 of its related species showed the normal V-content of the higher fungi tested. A correlation with the presence of molybdenum could not be detected. A special enrichment of Mo was not found in higher fungi. The analysis of several fruit bodies from A. muscaria showed that the highest V-content was present in the bulb and in the lamellae, both contents increasing with age, while the spores contained only 1 — 2% of the lamellar vanadium. 
  Reference    Z. Naturforsch. 33c, 1 (1978); eingegangen am 12. Dezember 1977/11. Januar 1978 
  Published    1978 
  Keywords    Vanadium, Molybdenum, Higher Fungi, Amanitaceae 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0001.pdf 
 Identifier    ZNC-1978-33c-0001 
 Volume    33 
2Author    Hans-Ulrich Meisch, Wolfgang Reinle, Bernd-Arwed RichterRequires cookie*
 Title    Zur Frage biogener Anreicherungen von Vanadium und Nickel in Pflanzen des Karbonzeitalters The Question of Biogenous Enrichments of Vanadium and Nickel in Plants of the Carbon Age  
 Abstract    O riginal carbonaceous m aterial of fossile carbon plants from the divisions of the Equisetophyta (Calam ariaceae), Lycophyta (Lepidodendraceae, S igillariacea e), Filicophyta (F ilicatae), and Sper-matophyta (Pteridospermatae, Cordaitidae) was analyzed by atomic absorption spectroscopy on its content of the trace metals vanadium and nickel. The average V-content was found to be 1 0 to 100 fold higher than that of the neighbouring coal beds or that of the embedding materials, while the Ni-concentrations were found to be almost in the same range. The highest contents of V and N i were found in the Calamariaceae and in the Pteridospermatae. The V-and Ni-contents of the fossile carbon plants are compared to those of related recent plant genera (clubmosses, horse­ tails, fern s), which were analyzed by 46 representative samples. A possible biogenous enrichment of V and N i in plants of the carbon age is discussed. 
  Reference    Z. Naturforsch. 33c, 616 (1978); eingegangen am 7. Juni/21. Juni 1978 
  Published    1978 
  Keywords    Vanadium, Nickel, Carbon, Carbon Plants, Ferns, Horsetails, Clubmosses 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0616.pdf 
 Identifier    ZNC-1978-33c-0616 
 Volume    33 
3Author    CandadaiS. RamadossRequires cookie*
 Title    Effects of Vanadate on the Molybdoproteins Xanthine Oxidase and Nitrate Reductase: Kinetic Evidence for Multiple Site Interaction  
 Abstract    The inhibition of the activity o f xanthine oxidase by vanadate was strikingly similar to vanadate inhibition of another molybdoprotein nitrate reductase. Although the main catalytic activity of both enzymes was inhibited, the partial N AD H oxidase activity associated with these enzymes was stimulated several fold. It appears that the metal ion binds at multiple site in both enzymes. In the absence o f any enzymes a combination of vanadium (V) and molybdenum (V) in air was found to oxide NADH rapidly. 
  Reference    Z. Naturforsch. 35c, 702—707 (1980); received June 3 1980 
  Published    1980 
  Keywords    Molybdenum, Vanadium, Nitrate Reductase, Xanthine Oxidase 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0702.pdf 
 Identifier    ZNC-1980-35c-0702 
 Volume    35 
4Author    Hans-Ulrich Meisch, Heinz Hoffmann, Wolfgang ReinleRequires cookie*
 Title    Vanadium Catalysis in the Nonenzymatic Transamination of 8-Aminolevulinic Acid  
 Abstract    By nonenzymatic model reactions, the influence o f vanadium (V 0 2+, V 0 3~) and other metal ions (A l3+, F e2+, F e3+, Zn2+, N i2+, Cr3+) on the transamination of 4,5-dioxovaleric acid (D O V A) with L-alanine (A la) to 6 -aminolevulinic acid (<5-ALA) and pyruvic acid (P A) with pyridoxal phosphate (P L P) is investigated. The examinations o f the partial reactions show that V 0 2+, V 0 3~ and F e2+ effectively enhance both conversions, while N i2+ only promotes the conversion of D O V A to 6 -A L A with pyridoxamine phosphate (P M P) . Besides Cr3+ , which inhibits the transaminations, all other metals tried slightly enhance both reactions. The coupled transamination D O VA/A la to (5-ALA/PA with P L P as a catalyst is performed at 40 °C , the extent of the reaction being judged by the amount o f 6 -A L A formed. Am ong all metal ions tested, V 0 2+ and V 0 3~ were found to be the most effective ones. Fe2+, A l 3+ and Fe3+ also slightly enhance the reaction, but all other metals do not influence or inhibit the transamination. In presence of V 0 2+ or V O 3-ions, the optimum pH of the reaction shifts from pH 4 to pH 7.4. The positive influence of vanadium on <5-ALA trans­ amination is discussed in connection with known structures of analogous Schiff base complexes with metal ions. 
  Reference    Z. Naturforsch. 33c, 623 (1978); received March 21 1978 
  Published    1978 
  Keywords    Vanadium, (5-Aminolevulinic Acid, 45-Dioxovaleric Acid, Transamination, Pyridoxal Phosphate, Schiff Base Complexes 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0623.pdf 
 Identifier    ZNC-1978-33c-0623 
 Volume    33