O-CARBOXYMETHYLAGAR - INTERACTION WITH DIVALENT-CATIONS

被引：3
|
作者：
BOSCO, M
GAMINI, A
RIZZO, R
机构：
[1] CTR ROCERCHE POLY BIOS,BIOPOLIMERI TECNOL LAB,AREA RIC TRIESTE,I-34012 TRIESTE,ITALY
[2] UNIV TRIESTE,DIPARTIMENTO BIOCHIM BIOFIS & CHIM MACROMOLEC,I-34127 TRIESTE,ITALY
来源：
CARBOHYDRATE POLYMERS | 1994年 / 25卷 / 02期
关键词：
D O I：
10.1016/0144-8617(94)90141-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
O-Carboxymethylagar was produced from a commercial, low methoxylated agar sample. The degree of substitution of the sample was 1.2 carboxymethyl groups per disaccharide repeating unit. The procedure used for the synthesis lowered the polymer molecular weight slightly. Carboxymethylagar exhibited different binding behaviour with different divalent cations. Interaction with ions was monitored by polarography, circular dichroism, and isothermal microcalorimetry. The polycarboxylate interacted strongly with lead ions, and showed lower affinity for copper ions. Little interaction was detected with respect to other divalent cations.
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页码：71 / 77
页数：7
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