Molecular Interaction Study of Glycine in Aqueous Lactose Solution Using Volumetric, Acoustic and Viscometric Methods at Different Temperatures

Authors

  • Rita Mehra Acoustic & Environmental Laboratory Department of Pure & Applied Chemistry, M D S University, Ajmer, India
  • Brij Bihari Malav Acoustic & Environmental Laboratory Department of Pure & Applied Chemistry, M D S University, Ajmer, India

DOI:

https://doi.org/10.37591/jomcct.v3i1-3.2033

Keywords:

Lactose, glycine, water, viscosity, refractive index

Abstract

Density, viscosity, sound speed and refractive index of glycine in aqueous lactose solution at varying concentrations from 0.1035 to 1.0345 m at 298, 308, and 318 K have been determined using precalibrated bycapillary pycnometer, Ostwald’s viscometer and single frequency ultrasonic interferometer at 2 MHz frequency respectively. The derived acoustic parameters like apparent molal volume( ), apparent molal compressibility( ), specific acoustic impedance (Z), intermolecular free length (Lf),  acoustical relaxation time ( ), relative association (RA), free volume (Vf), absorption coefficient (α/f2), adiabatic compressibility (β), hydration number (nH), Gibbs free energy (ΔG), internal pressure (πi), Rao’s constant (Rm), Wada’s constant (W), limiting apparent molal volume(fvo), limiting apparent molal compressibility(fko), Jones-Dole coefficient (B), Falkenhagen coefficient (A) and molar refractivity (RD) have been calculated from experimental data. All measurements have been carried out in a thermostatic controlled refrigerated water bath with circulating medium with an accuracy of ± 0.1 º C. As the temperature increases, solute solvent interactions also increase. Positive values of B coefficient also suggest that glycine is a structure maker at the investigated temperatures

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Published

2019-05-04

Issue

Vol. 3 No. 1-3 (2012)

Section

Articles

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