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|Title:||Temperature of maximum density of aqueous solutions of some α-amino acids|
|Authors:||Kaulgud, M V|
Mate, V K
|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.|
|Appears in Collections:||IJC-A Vol.30A(10) [October 1991]|
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