Temperature Dependence of Apparent Molar Volumes and Viscosity B-Coefficients of Amino Acids in Aqueous Sodium Sulfate Solutions from 15 to 35°C

Authors: M.N. Islam; Ramesh K. Wadi

Source: Physics and Chemistry of Liquids, Volume 41, Number 5, October 2003 , pp. 533-544(12)

Publisher: Taylor and Francis Ltd

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Abstract:

Precise density rho

and viscosity eta

at 15, 25 and 35°C for solutions of glycine, _dl-alanine, _dl- alpha

-aminobutyric acid, _dl-valine, beta

-alanine,

-aminobutyric acid and delta

-aminovaleric acid in water and in (0.5, 1.0 and 1.5 M) aqueous sodium sulfate were measured and the limiting apparent molar volumes and viscosity B-coefficients were calculated. The and B values were split into the contributions from the hydrocarbon chains and zwitterionic group of alpha

-amino carboxylic acids and the , COO^- and CH₂ groups of omega

-amino acids. These data have been rationalized on the basis of hydrophilic and hydrophobic interactions between the various entities present in these solutions.