Properties of amidated pectins. II. Polyelectrolyte behavior and calcium binding of amidated pectins and amidated pectic acids
作者： E. Racape , J. F. Thibault , J. C. E. Reitsma , W. Pilnik
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摘要: The intrinsic pK values, as well the free fractions of sodium and calcium counterions, were determined on salt-free solutions amidated pectinates pectates. apparent values non dependent degree amidation but only to effective charge density pectic polymers an unique value 2.9 ± 0.1 was found for value. results obtained by conductimetry with (sodium calcium) specific electrodes showed a blockwise distribution amide acid groups in pectates rather statistical pectinates.
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