Molecular interaction study of glycine in aqueous galactose solution and effect of sodium chloride at 298 to 318 K

摘要

Sound speed, density and viscosity of glycine in aqueous galactose solution at varying concentrations from 0.1035 to 1.0345 m at 298, 308 and 318 K have been determined. Density, viscosity and sound speed have been measured by using pre-calibrated bicapillary pycnometer, Ostwald's viscometer and single-frequency ultrasonic interferometer at 2 MHz frequency, respectively. The derived acoustic parameters like free volume (V_f ), adiabatic compressibility (β), hydration number (n_H ) and Gibbs free energy for activation (ΔG) acoustic impedance (Z), intermolecular free length (L_f ) and relative association (R_A ), internal pressure (π_i ), Rao's constant (R), Wada's constant (W) have been calculated from experimental data. All the measurements have been carried out in a thermostatic water bath having PT-100 sensor with circulating medium with an accuracy of ± 0.1°C. Solute-solvent interactions dominate over solute-solute interactions and, the solute-solvent interactions increase with temperature.View full textDownload full textKeywordsgalactose, glycine, free energy, internal pressure, densityRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00319104.2011.604778