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'copper' in keywords Facet   section ZfN Section C  [X]
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1Author    Hans-Ulrich Meisch, JohannesA. Schmitt, Wolfgang ReinleRequires cookie*
 Title    Schwermetalle in höheren Pilzen Cadmium, Zink und Kupfer Heavy Metals in Higher Fungi Cadmium, Zinc, and Copper  
 Abstract    In a series of 190 samples, higher fungi, especially from the genus Agaricus, were analyzed by atomic absorption spectroscopy on their content of the trace metals cadmium, zinc, and copper. Cd was found to be present in high concentrations in some Agaricus species belonging to special taxonomic groups. In relation to soil concentrations, Cd is highly enriched in some Agaricus spec., the enrichment being a taxonomic criterion of special value. Among the remaining genera of higher fungi, only Leucoagaricus and Amanita showed similiar enrichment properties for cadmium. The chemically related metals Zn and Cu were found to be relative uniformely distributed in all analyzed fungi. No synergistic or antagonistic relationship between Cd and the other two metals could be detected in the mushrooms. 
  Reference    (Z. Naturforsch. 32c, 172 [1977]; eingegangen am 28. Januar 1977) 
  Published    1977 
  Keywords    Cadmium, Zinc, Copper, Higher Fungi, Agaricus 
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 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0172.pdf 
 Identifier    ZNC-1977-32c-0172 
 Volume    32 
2Author    Heinz Rupp, K., Jozef Verplaetse, Rene LontieRequires cookie*
 Title    Binuclear Copper Electron Paramagnetic Resonance Signals of a-Methemocyanin of Helix pomatia  
 Abstract    The binuclear electron paramagnetic resonance signals o f a-methemocyanin o f Helix pomatia were investigated at liquid helium temperatures. These signals were completely eliminated by the addition of fluoride and enhanced in the presence o f chloride, which did not alter the saturation behavior. The triplet nature of the signal at g = 4.59 was confirmed by the low power-saturation. The addition of nitrite at pH 5.0 and 0° C yielded slowly and reversibly a seven-line half-field signal. On lowering the temperature the intensity of the triplet signals increased to the lowest tem­ perature reached 4.2 K, excluding a strong exchange coupling. 
  Reference    Z. Naturforsch. 35c, 188—192 (1980); received September 18/November 17 1979 
  Published    1980 
  Keywords    Copper, Electron Paramagnetic Resonance, Hemocyanin, Microwave Power Saturation 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0188.pdf 
 Identifier    ZNC-1980-35c-0188 
 Volume    35 
3Author    R. Om, G., EligiuszS. Erafin, JanuszM. AzurRequires cookie*
 Title    The Kinetics of the Reaction of Thiocyanate and Nitrite Ions with Orconectes limosus Oxyhemocyanin  
 Abstract    The time course of the reaction of oxyhemocyanin from the arthropod Orconectes limosus with SCN" and N 0 2 " was investigated. After addition of one of these anions to oxyhemocyanin solu­ tion an exponential decay of A 340 was found, indicating a removal of oxygen from the active site. The order of reaction with respect to ligand was about 3 for thiocyanate and about 1 for nitrite. On this basis, a possible arrangement of ligands in the active site has been proposed. The final product of reaction with SCN" yielded a mononuclear copper EPR spectrum while the reaction product with N 07 gave a characteristic spectrum of two coupled Cu2+ ions. It was possible to remove the ligands from the active site by dialysis. The reaction patterns showed distinct changes in a narrow pH range, 5.3—6.5. A possible effect of structural alterations of the protein moiety on the course of the reaction of oxyhemocyanin with ligands is suggested. 
  Reference    Z. Naturforsch. 40c, 677—681 (1985); received February 4 1985 
  Published    1985 
  Keywords    Hemocyanin, Reaction Kinetics, Copper, Electron Paramagnetic Resonance 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0677.pdf 
 Identifier    ZNC-1985-40c-0677 
 Volume    40 
4Author    M. Ciscato3 ', J. Vangronsveldb, R. Valcke3Requires cookie*
 Title    Effects of Heavy Metals on the Fast Chlorophyll Fluorescence Induction Kinetics of Photosystem II: a Comparative Study  
 Abstract    The effects of toxic concentrations of Cu, Zn and Cd on the fast induction kinetics of fluorescence from photosystem(PS)II were investigated in a comparative way. The fast fluo­ rescence transient from primary leaves of m etal-treated bean plants was studied. During several days after metal application, the time course of the changes induced by the different metals was monitored. The results evidenced not only a different time course of the changes in fluorescence related parameters for the three metals, but also different effects on the fluorescence induction kinetics, which could possibly be linked to different mechanisms of action of the metals. 
  Reference    Z. Naturforsch. 54c, 735 (1999); received November 8 1998/M arch 10 1999 
  Published    1999 
  Keywords    Cadmium, Chlorophyll Fluorescence, Copper, Heavy Metals, Zinc 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0735.pdf 
 Identifier    ZNC-1999-54c-0735 
 Volume    54