Vopr Pitan. 2001;70(2):39-41.

[Thermodynamic approach to the selection of polyuronide sequestrants for protection of the human body from toxic metal ions. Interactions of polyuronides with lead ions].

[Article in Russian]

Braudo EE, Danilova IV, Dianova VT, Kobak VV, Plashchina IG.

Abstract

Binding isotherms of Pb2+ ions with potassium pectate and potassium alginate with relatively low content of blocks of L-guluronic residues (20%) have been determined. Interactions of Pb2+ ions with polyuronides studied is cooperative. Maximum values of binding constants are an order of magnitude higher than previously determined ones for Ca2+ and Sr2+ ions. Along with ion-coordination ("stoichiometric") interactions, alginate is typified by so-called extra-stoichiometric binding of Pb2+ ions, which presumably proceeds by a coprecipitation mechanism. Limitations of the thermodynamic approach to the selection of sequestrants for human body protection from toxic metal ions are discussed.

PMID:: 11494672; [PubMed - indexed for MEDLINE]

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[Thermodynamic approach to the selection of polyuronide sequestrants for protection of the human body from toxic metal ions. Interactions of polyuronides with lead ions].

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