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1983 (1)
1980 (2)
1Author    Oemer Saygin, Peter DeckerRequires cookie*
 Title    Nonenzymatic Catalysis by Metal Ions and Phosphoric Acid Esters of Hydroxamic Acid Formation*  
 Abstract    Nonenzymatic catalysis by bivalent ions of Be, Mg, Ca, Zn, Mn, Ni and Co and bio-organic phosphates of the formation of hydroxamic acids from acetate or amino acids has been studied systematically. Increased yields of hydroxamate were observed at particular combinations of reactants. The most prominent increase (ca. 15-fold) was found with acetate and Ni++, and with a combination of ATP and Be++. Among others especially ribose-5-phosphate and glucose-5-phosphate enhanced yields in the presence of most metal ions. Since no release of inorganic phosphate was observed, this effect cannot be interpreted as an evidence for intermediate transhosphorylation reactions; it may also result from simple catalytic effects of metal sugar complexes. 
  Reference    Z. Naturforsch. 35b, 727—730 (1980); received February 7 1980 
  Published    1980 
  Keywords    Prebiological Evolution, Bioids, Transphosphorylation, Hydroxylamine, Acylate Activation 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0727.pdf 
 Identifier    ZNB-1980-35b-0727 
 Volume    35 
2Author    Omer SayginRequires cookie*
 Title    Nonenzymatie Formation of Energy Rich Phosphates in the Course of Imidazole Oxidation with Fenton's Reagent  
 Abstract    Oxidation of substituted imidazoles with modified Fenton's reagent (Fe(II), ascorbic acid, EDTA and H2O2) in aqueous solution at pH 5-7 in the presence of inorganic ortho-phosphate gives high yields of an unknown bound phosphate, in the case of 2-methyl-imidazole up to 35% based on inorganic phosphate. The dependence of the yields on reaction parameters and the hydrolytic behaviour of the compound was studied. The products are unstable in alkaline medium and fairly stable in acid solution (half-life period ca. 1 h at 25 °C in IN perchloric acid). Similar bound phosphate was also observed using autoxidation with O2 instead of H2O2. 
  Reference    Z. Naturforsch. 35b, 1009—1014 (1980); received February 29 1980 
  Published    1980 
  Keywords    Bioids, Oxidative Phosphorylation, Photophosphorylation, Fenton's Reaction, Imidazole Oxidation 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1009.pdf 
 Identifier    ZNB-1980-35b-1009 
 Volume    35 
3Author    Omer Say, Peter DeckerRequires cookie*
 Title    An Energy Rich Phosphate from 2 -Methylimidazole through Nonenzymatic Photophosphorylation * 4 * *  
  Reference    Z. Naturforsch. 38b, 1098—1100 (1983); received March 28 1983 
  Published    1983 
  Keywords    Bioids, Photophosphorylation, Imidazole Oxidation, Nonenzymatic Phosphate Activation, 4, 5-Dihydroxy-2-methylimidazoline-0-mono phosphate 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1098.pdf 
 Identifier    ZNB-1983-38b-1098 
 Volume    38