Densities and solubilities of glycylglycine and glycyl-l-alanine in aqueous electrolyte solutions

Solvent Effect on Protonation Constants of L-alanine and Alanine Methyl ester in Different Aqueous Solutions of 1,4-Dioxane

The protonation constants of alanine and alanine methyl ester were determined in different aqueous solutions of 1,4-dioxane containing (0-50% v/v), using a potentiometric method at 25o C and constant ionic strength 0.1 mol.L-1 (NaCl). The protonation constants were analyzed in terms of Kamlet, Abboud and Taft (KAT) parameters. The results show that the effect of β is higher in comparison with t...

Peptidases in human blood. I. The hydrolysis of glycylglycine and glycyl-L-leucine by normal serum.

Ever since peptidases were shown to be present in serum, various theories have been proposed to explain the origin and the mode of release of these enzymes (14). A thorough study of the properties of various serum peptidases has, however, not been made; instead, most investigators have tacitly assumed that the serum enzymes behave in a manner analogous to that of the known peptidases isolated f...

solvent effect on protonation constants of l-alanine and alanine methyl ester in different aqueous solutions of 1,4-dioxane

Multicomponent Concentrated Aqueous Electrolyte Solutions

An Evaluation of Four Electrolyte Models for the Prediction of Thermodynamic Properties of Aqueous Electrolyte Solutions

In this work, the performance of four electrolyte models for prediction the osmotic and activity coefficients of different aqueous salt solutions at 298 K, atmospheric pressure and in a wide range of concentrations are evaluated. In two of these models, (electrolyte Non-Random Two-Liquid e-NRTL and Mean Spherical Approximation-Non-Random Two-Liquid MSA-NRTL), association between ions of opposit...