Enthalpies of solution of glycylglycine and diglycylglycine in aqueous alcohols at 298.15 K

被引：21

作者：

Smirnov, Valeriy I. ^{[1
]}

Badelin, Valentin G. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Solut Chem, Lab Thermodynam Solut Nonelectrolytes & Biologica, Ivanovo 153045, Russia

来源：

THERMOCHIMICA ACTA | 2008年 / 471卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

peptides; aqueous and alcoholic solutions; enthalpies of solution and transfer;

D O I：

10.1016/j.tca.2008.01.020

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The integral enthalpies of solution of glycylglycine and diglycylglycine in water-ethanol, water-n-propanol and water-i-propanol mixtures were measured at 298.15 K and alcohol mole fraction concentrations (x(2)) ranging up to 0.3 by calorimetry. The Delta H-sol degrees and Delta H-lr degrees vs. x(2) were found to have extrema. Enthalpic coefficients of pairwise interactions (h(xy)) between peptide and alcohol molecules were positive and increased in the series ethanol, n-propanol, i-propanol. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：97 / 99

页数：3

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