PHYSICOCHEMICAL PROPERTIES OF EXOGEL EXOCELLULAR BETA(1-4)-D-GLUCURONAN FROM RHIZOBIUM-MELILOTI STRAIN M5N1 CS (NCIMB-40472)

被引：22

作者：

DANTAS, L

HEYRAUD, A

COURTOIS, B

COURTOIS, J

MILAS, M

机构：

[1] CNRS,CTR RECH MACROMOLEC VEGETALES,F-38041 GRENOBLE 9,FRANCE

[2] IUT,DEPT APPL BIOL,BIOTECHNOL MICROBIENNE LAB,F-80025 AMIENS,FRANCE

来源：

CARBOHYDRATE POLYMERS | 1994年 / 24卷 / 03期

关键词：

D O I：

10.1016/0144-8617(94)90129-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The Rhizobium meliloti mutant strain M5N1 C.S. (NCIMB 40472) produces a polyuronic acid as beta(1 --> 4)-D-glucuronan with molecular weight between 1.5 x 10(5) and 3 x 10(5). With a pK(o) of about 3 and L(p) similar or equal to 110 Angstrom, this polyelectrolyte is comparable with alginates and pectins. In solution, acetyl content and high external salt concentrations favour aggregation. At high concentrations the polysaccharide forms thermoreversible or thermally stable gels according to the nature of the counterion, the polymer concentration and the ionic strength.

引用

页码：185 / 191

页数：7

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