Authors : A. T. Shende
Page Nos : 270-273
Description :
Abstract:
Adiabatic compressibility of amino acids has been measured by ultrasonic technique at frequency 4MHz and ionization of side chain and solvation effects are discussed. The same data is used to characterize the structure of amino acids. The negative slope of adiabatic compressibility with molar concentration indicating the existence of dynamic domains within the system. For this study ultrasonic velocity and density were measured in six aqueous amino acids namely; L-Alanine, L-Aspartic Acid, L-Glutamic Acid, L-Glutamine, L-Phenylalanine and L-Valine of different concentration at 308.15 K. Adiabatic compressibility was evaluated using experimentally determined ultrasonic velocity and density and the same used for structural characterization of aqueous amino acids.
Keywords: ultrasonic velocity, density, amino acid structure, volume fluctuations
