Volumetric and thermodynamic parameters of Ɩ-leucine in ethanol+ water mixtures at different temperatures

The physicochemical properties of amino acids in aqueous solutions provide valuable information on solutesolute and solute-solvent interactions [1-6]. These interactions are important in understanding the stability of proteins, and are implicated in several biochemical and physiological processes in a living cell [7-9]. A.Ali and Shahajan10 measured the density and viscosity and refractive index in aqueous tetrapropylammonium bromide containing Ɩ-leucine DƖ-alanine DƖ-valine and glycine for several concentrations of amino acids at different temperatures. A.Ali ,S. Khan and F. Nabi11 measured the density and viscosity and refractive index in aqueous glycerol containing Ɩ-leucine DƖ-alanine DƖ-valine, DƖ-α- amino-n- butyric acid and glycine for several concentrations of amino acids at different temperatures

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