EFFECTS OF DENATURING AGENTS ON THE MOLECULAR ASSOCIATION OF DEXTRAN .1. AQUEOUS-SOLUTIONS

被引：22

作者：

GUNER, A

机构：

[1] Hacettepe University, Faculty of Science, Chemistry Department, Ankara, 06532, Beytepe

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 1995年 / 56卷 / 12期

关键词：

D O I：

10.1002/app.1995.070561206

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Molecular association of aqueous dextran solutions have been investigated by viscosimetric measurements. Intrinsic viscosities of different concentrations of aqueous solutions of dextran with a variety of denaturing agents have been determined. Intrinsic viscosity numbers and Huggins constants of dextran solutions decreased with the addition of denaturig agents. The reducing effect of denaturing agents on the intrinsic viscosities and Huggins constants decreased in the order guanidinium sulfate > guanidinium carbonate > guanidinium chloride > thiourea > urea. The effect of temperature on the intrinsic viscosities of dextran and dextran denaturing agent solutions have also been investigated. A small change in the intrinsic viscosity values was observed for dextran in 1M of guanidinium carbonate and sulfate solutions with the increase of the temperature from 25 to 40 degrees C. Aqueous dextran solutions, however, showed a significant decrease in the intrinsic viscosities in the same temperature range. (C) 1995 John Wiley and Sons, Inc.

引用

页码：1561 / 1565

页数：5

共 19 条

[1]

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[2] HUGGINS VISCOMETRIC CONSTANT OF SOME LINEAR POLYMERS IN A SERIES OF SOLVENTS [J].