Ultrasonic Study of Amino Acids in Aqueous Urea Mixture at 298K

Abstract

Ultrasonic velocity (U), density (ρ) and viscocity (η) have been measured for three amino acids viz., glycine, L-alanine and L-serine in the aqueous urea (0.1 m) at 298K. Using the experimental values, the adiabatic compressibility (β), change in adiabatic compressibility (Δβ), relative change in adiabatic compressibility (Δβ/βº), apparent molal compressibility (ϕ_K) apparent molal volume (ϕ_V), limiting apparent molal compressibility ( ϕ^o_K ),  limiting apparent molal volume ( ϕ^o_V and their constant (S_K, S_V) and viscosity B-coefficient were calculated for all the ternary systems. The results are interpreted in the light of intermolecular interaction in terms of the structure-making or structure-breaking effect of these amino acids in the mixture.