Interactions of Diglycine in Aqueous Saccharide Solutions at Varying Temperatures: A Volumetric, Ultrasonic and Viscometric Study
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Densities, viscosities and speeds of sound were measured for ternary mixtures of diglycine (0.05 to 0.30 mol⋅kg−1) in 2, 4 and 6 mass-% aqueous xylose, L(-)arabinose, and D(-)ribose solutions at 288.15, 298.15 and 308.15 K and at atmospheric pressures, using a DSA 5000 instrument. The limiting apparent molar volume, limiting apparent molar adiabatic compressibility and their corresponding slopes were computed using the density and speed of sound data. Corresponding transfer functions have also been determined. The viscosity data have been analyzed on the basis of the Jones-Dole equation. The viscosity B-coefficient and Gibbs energy of activation of viscous flow per mole of solvent and solute have been evaluated. Hydration numbers, pairwise and triplet interaction coefficients have also been evaluated from these data. The variations of these parameters with concentration and temperature clearly suggest the roles of diglycine and saccharides in solute–solvent interactions.
KeywordsDiglycine Saccharides Apparent molar volume Apparent molar adiabatic compressibility Viscosity
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- 1.Haq, I., O’Brien, R.R.J., Ladbury, J.E.: In: Raffa, R.B. (ed.) Drug-Receptor Thermodynamic: Introduction and Application, Chap. 5. Wiley, New York (2001) Google Scholar
- 9.Liu, J.L., Hakin, A.W., Hedwig, G.R.: Volumetric properties of tripeptides with polar side chains: Partial molar volumes at T=298.15 K of some peptides of sequence gly-Xgly in aqueous solution. J. Chem. Thermodyn. 41, 1332–1338 (2009) Google Scholar
- 10.Pal, A., Chauhan, N.: Densities, speeds of sound and viscosities of L-alanine in aqueous fructose, maltose and lactose solutions at different temperatures. Ind. J. Chem. 48A, 1069–1077 (2009) Google Scholar
- 16.Pal, A., Singh, N.: Volumetric and ultrasonic studies of diglycine in binary aqueous solutions of saccharide at 288.15, 298.15 and 308.15 K. J. Ind. Chem. Soc. 86, 1280–1294 (2009) Google Scholar
- 25.Harned, H.S., Owen, B.B.: The Physical Chemistry of Electrolytic Solutions, 3rd edn. ACS Monograph Series, vol. 137. Reinhold, New York (1958) Google Scholar
- 32.Galasstone, S., Laidler, K., Eyring, H.: The Theory of Rate Processes, p. 477. McGraw-Hill, New York (1941) Google Scholar