CONFORMATIONAL TRANSITION IN AQUEOUS-SOLUTION OF POLY(L-GLUTAMIC ACID) - A LOW-FREQUENCY ELECTRICAL-CONDUCTIVITY STUDY

被引：14

作者：

BORDI, F

CAMETTI, C

PARADOSSI, G

机构：

[1] UNIV ROME LA SAPIENZA,DIPARTMENTO FIS,I-00185 ROME,ITALY

[2] UNIV ROMA TOR VERGATA,DIPARTIMENTO MED INTERNA,SEZ FIS MED,ROME,ITALY

[3] UNIV ROMA TOR VERGATA,DIPARTIMENTO SCI & TECNOL CHIM,ROME,ITALY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 02期

关键词：

D O I：

10.1021/j100181a070

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The low-frequency electrical conductivity of poly(L-glutamic acid) in aqueous solutions has been measured during the whole conformational transition from alpha-helix to random coil, induced by change of pH. The results are compared with the conductivity deduced on the basis of the Manning condensation theory for cylindrical polyeletrolytes and with the Poisson-Boltzmann spherical cell model assuming a simple additive relationship of the polymer and small ion contribution. The influence of the molecular weight is discussed.

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页码：913 / 918

页数：6

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