scholarly journals Solvent extraction of lanthanoid, yttrium and some polyvalent metal ions with phosphoric acid esters of Triton X-100.

1986 ◽  
Vol 2 (5) ◽  
pp. 447-450 ◽  
Author(s):  
Isao YOSHIDA ◽  
Jun'ichi HIRASAWA ◽  
Hiroto TSUMAGARI ◽  
Keihei UENO ◽  
Makoto TAKAGI
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Metal Ions ◽  
Polyvalent Metal ◽  
Triton X ◽  
Acid Esters

Nonenzymatic Catalysis by Metal Ions and Phosphoric Acid Esters of Hydroxamic Acid Formation

1980 ◽  
Vol 35 (6) ◽  
pp. 727-730
Author(s):  
Oemer Saygin ◽  
Peter Decker
Keyword(s):  
Amino Acids ◽  
Phosphoric Acid ◽  
Metal Ions ◽  
Inorganic Phosphate ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
Bivalent Ions ◽  
No Release ◽  
Catalytic Effects ◽  
Acid Esters

Abstract Nonenzymatic catalysis by bivalent ions of Be, Mg, Ca, Zn, Mn, Ni and Co and bioorganic 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.

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