Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5413241 | Journal of Molecular Liquids | 2008 | 7 Pages |
Abstract
The apparent molar volumes, VÏ of diglycine, triglycine and glycyl-l-leucine have been determined in water and in aqueous sodium acetate (0.5, 1.0, 2.0, and 4.0 mB) and magnesium acetate (0.5, 1.0, 1.5, and 2.0 mB) solutions at 298.15Â K by the measurement of densities using vibrating-tube digital densimeter. The partial molar volumes, V2,m0 obtained from VÏ have been used to calculate the partial molar volumes of transfer, ÎtrV2,m0 for these peptides from water to aqueous solutions of sodium acetate (SA) and magnesium acetate (MA) solutions. The hydration numbers, nH and volumetric interaction coefficients have also been calculated. The ÎtrV2,m0 data suggest that ion-charged/or peptide group interactions of peptides are stronger with MA in comparison to SA.
Keywords
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
T.S. Banipal, Damanjit Kaur, P.K. Banipal, Gagandeep Singh,