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- W1980950727 abstract "Using the equilibrium dialysis technique, the interaction of Cu, Zn and Ca with pectin, alginate, carrageenan and gum guar was studied. The experiments were done either in sodium hydrogencarbonate solution, the physiological HCO−3CO2 buffer of the intestine, or in diluted HCl or NaOH, to keep the ionic strength as low as possible. Great differences in the binding in both media were detected. With increasing pH the amount of metal bound to the isolated acid polysaccharides rose in diluted HCl or NaOH, reaching a maximum binding at pH > 5. In buffer the binding also increased with rising pH (pH 2–5), reaching a maximum at pH 5–6, but declined almost to zero at pH > 6. Because of low affinity no interaction could be detected in buffer between Ca and pectin, Ca, Zn and carrageenan and between Cu, Zn, Ca and gum guar. Based on the pH-dependent binding in the HCO−3CO2 buffer, it is suggested that, under relevant physiological conditions of the intestine (jejunum and ileum), the interaction of Cu2+, Zn2+ and Ca2+ with the tested isolated polysaccharides is very weak." @default.
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- W1980950727 date "1989-01-01" @default.
- W1980950727 modified "2023-10-10" @default.
- W1980950727 title "Studies of the binding of copper, zinc and calcium to pectin, alginate, carrageenan and gum guar in HCO−3CO2 buffer" @default.
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- W1980950727 doi "https://doi.org/10.1016/0308-8146(89)90051-4" @default.
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