Thermodynamic characteristics of stepwise dissociation of glycyl-glycyl-glycine in aqueous solutions

A. I. Lytkin; V. V. Chernikov; O. N. Krutova; G. G. Gorboletova; I. A. Skvortsov; A. S. Korchagina

doi:10.1134/S0036023617020115

Thermodynamic characteristics of stepwise dissociation of glycyl-glycyl-glycine in aqueous solutions

作者: Lytkin A.I.¹, Chernikov V.V.¹, Krutova O.N.¹, Gorboletova G.G.¹, Skvortsov I.A.¹, Korchagina A.S.¹
隶属关系:
1. Ivanovo State University of Chemistry and Technology
期: 卷 62, 编号 2 (2017)
页面: 240-243
栏目: Physical Chemistry of Solutions
URL: https://journal-vniispk.ru/0036-0236/article/view/167407
DOI: https://doi.org/10.1134/S0036023617020115
ID: 167407

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The heats of interaction between glycyl-glycyl-glycine and solutions of nitric acid and potassium hydroxide are determined by calorimetry at 298.15 K and ionic strengths of 0.25, 0.50, and 0.75 in the presence of KNO₃. The standard thermodynamic characteristics (Δ_rH°, Δ_rG°, and Δ_rS°) of acid–base interaction in aqueous solutions of the peptide are calculated. The effect of background electrolyte concentration on the enthalpy of dissociation of glycyl-glycyl-glycine is discussed.