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Title: Temperature of maximum density of aqueous solutions of some α-amino acids
Authors: Kaulgud, M V
Shrivastava, Anjali
Mate, V K
Issue Date: Oct-1991
Publisher: NISCAIR-CSIR, India
Abstract: Temperatures of maximum density (TMD) at different low concentrations of aqueous solutions of glycine, α-alanine, 1-serine, aspartic acid, asparagine, leucine and isoleucine have been reported. The changes in TMD with respect to that of water vary non-linearly with concentration of the amino acid. By subtracting from the observed change in TMD (∆θ), an ideal contribution evaluated numerically, it is possible to calculate the structural part ∆θstr. The quadratic dependence of ∆θstr on amino acid concentration is given by ∆θstr = ax + bx2 (x= mole fraction) thus enabling a graphical evaluation of the interaction parameters a (solute-solvent) and b (solute-solute). Evaluation of limiting expansibilities of the amino acids at 4°C also corroborate the findings based on a values.
Page(s): 834-838
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.30A(10) [October 1991]

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