Enthalpies of solution of DL-α-alanyl-DL-α-asparagine in aqueous alcohols at 298.15 K

被引：9
|
作者：
Smirnov, Valeriy I. [1 ]
Badelin, Valentin G. [1 ]
机构：
[1] Russian Acad Sci, Inst Solut Chem, Lab Thermodynam Nonelectrolytes Solut & Biologica, Ivanovo 153045, Russia
来源：
THERMOCHIMICA ACTA | 2011年 / 512卷 / 1-2期
关键词：
Peptides; Solutions in aqueous alcohols; Enthalpies of solution and transfer; AMINO-ACIDS; INTERACTION COEFFICIENTS; WATER; VALINE; 25-DEGREES-C; MIXTURES; UREA;
D O I：
10.1016/j.tca.2010.08.022
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The enthalpies of solution of DL-alpha-alanyl-DL-alpha-asparagine(AlaAsn)were measured in aqueous methanol, ethanol, 1-propanol and 2-propanol with an alcohol mole-fraction content x(2) (from 0 to 0.4) at 298.15 K. The experimental results were used to calculate the enthalpies of transfer of AlaAsn from water to these mixtures as well as the enthalpy coefficients of pair-wise interactions (h(xy)) between AlaAsn and alcohol molecules in water, according to the McMillan-Mayer's model. The h(xy) values were found to be positive and increasing in a series methanol < ethanol < 1-propanol < 2-propanol. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：55 / 58
页数：4
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