Thermodynamics of the Stepped Dissociation of D,L-Alanil-D,L-Phenylalanine in Aqueous Solutions

被引：2

作者：

Lytkin, A. I. ^{[1
]}

Chernikov, V. V. ^{[1
]}

Krutova, O. N. ^{[1
]}

Krutov, P. D. ^{[1
]}

Romanov, R. A. ^{[1
]}

机构：

[1] Ivanovo State Univ Chem Technol, Ivanovo 153000, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2022年 / 96卷 / 08期

关键词：

D; L-alanil-D; L-phenylalanine; peptides; calorimetry; enthalpy; solutions; TEMPERATURE; NUCLEOTIDES; COPPER(II); DIPEPTIDES;

D O I：

10.1134/S0036024422080131

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：

Calorimetry is used to determine the heats of interaction between D,L-alanil-D,L-phenylalanine and solutions of nitric acid and potassium hydroxide at 298.15 K and ionic strengths of 0.5, 0.75, and 1.0 in solutions with KNO3. Standard thermodynamic characteristics (Delta H-r degrees, Delta(r)G degrees, Delta S-r degrees) are calculated for acid-base interaction in aqueous solutions of D,L-alanil-D,L-phenylalanine. The effect the concentration of background electrolyte has on the heats of dissociation of D,L-alanil-D,L-phenylalanine is considered. A comparative analysis is performed of the standard thermodynamic characteristics of the stepwise dissociation of L-phenylalanine and D,L-alanil-D,L-phenylalanine in light of modern ideas about the structure and physicochemical properties of these compounds and solutions of them.

引用

页码：1698 / 1701

页数：4

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