THE GELATION OF SODIUM ALGINATE WITH CALCIUM-IONS STUDIED BY MAGNETIC-RESONANCE-IMAGING (MRI)

被引：82

作者：

POTTER, K ^{[1
]}

BALCOM, BJ ^{[1
]}

CARPENTER, TA ^{[1
]}

HALL, LD ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,SCH CLIN MED,HERCHEL SMITH LAB MED CHEM,CAMBRIDGE CB2 2PZ,ENGLAND

来源：

CARBOHYDRATE RESEARCH | 1994年 / 257卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0008-6215(94)84112-8

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The displacement of the sol/gel interface during the gelation of sodium alginate by calcium ions can be tracked in both one and two dimensions using magnetic resonance imaging. In the one-dimensional gelation experiments, the distance moved by the sol/gel interface was proportional to (time(1/2)), which implies that the gelation process is diffusion-limited. Using the gelation model previously proposed by Smidsrod and co-workers, together with the initial reaction conditions and assuming that the diffusion coefficient of the alginate molecules is extremely small, it was found that the diffusion of calcium ions through the gel network is dependent on the initial concentration of the calcium, the ionic strength of the alginate solution, and the size of pores in the gel which is formed.

引用

页码：117 / 126

页数：10

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