Enthalpies of solution of β-alanyl-β-alanine in aqueous solution of amides at 298.15 K

被引：12
|
作者：
Smirnov, Valeriy I. [1 ]
Badelin, Valentin G. [1 ]
机构：
[1] Russian Acad Sci, Inst Solut Chem, Lab Thermodynam Nonelectrolytes Solut & Biol Act, Ivanovo 153045, Russia
来源：
THERMOCHIMICA ACTA | 2012年 / 536卷
关键词：
Peptide; Water; Amides; Enthalpy of solution; Enthalpy of transfer; Mixed solvent; THERMODYNAMIC PROPERTIES; AMINO-ACIDS; WATER; GLYCYLGLYCINE; DIPEPTIDES; MIXTURES; PEPTIDES; ALCOHOLS; VALINE; UREA;
D O I：
10.1016/j.tca.2012.02.028
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The enthalpies of solution Delta H-sol(m) have been determined for beta-alanyl-beta-alanine (bAlabAla) in aqueous solutions of formamide, N-methylformamide, N,N-dimethylformamide and N,N-dimethylacetamide. The measurements were made at 298.15 K and mole fraction of amide x(2) = (0-0.35) on the precise "isoperibol" calorimeter. The results obtained have been used to calculate the standard enthalpies of solution (Delta H-sol degrees) and transfer (Delta H-tr degrees) of bAlabAla from water into mixtures as well as the enthalpy coefficients of pairwise interaction (h(xy)) of the solute with amide in aqueous media. It is established by the interrelation between enthalpy characteristics of bAlabAla dissolution (transfer) and the composition of water-amide binary mixtures. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：74 / 76
页数：3
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