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International Journal of Thermophysics

, Volume 31, Issue 3, pp 572–584 | Cite as

Physicochemical Behavior of Some Amino Acids/Glycylglycine in Aqueous D-Galactose Solutions at Different Temperatures

  • Anwar Ali
  • Rajan Patel
  • Shahjahan
  • Nizamul Haque Ansari
Article

Abstract

The apparent molar volumes \({(\overline{V_2})}\) for glycine (Gly), l-alanine (Ala), phenylalanine (Phe), and glycylglycine (Gly-Gly) in 0.10 m aqueous d-galactose solutions have been determined from density measurements at (298.15, 303.15, 308.15, and 313.15) K. The data for \({(\overline{V_2})}\) were utilized to estimate the partial molar volume at infinite dilution \({(\overline{V_2^0})}\) , and experimental slope \({(S_{\rm v}^\ast)}\) . The transfer volume, \({(\overline{V_{2}^0}_{\rm (tr)})}\) , and hydration number, (n H) were also evaluated. The viscosity data were used to evaluate A- and B-coefficients of the Jones–Dole equation, the free energy of activation of viscous flow per mole of the solvent \({\left(\Delta \mu_{1}^{0\ast} \right)}\) and the solute \({\left(\Delta \mu _{2}^{0\ast} \right)}\) . The molar refractivity (R D) was calculated from refractive index data. The results were discussed in terms of hydrophilic–ionic, hydrophilic–hydrophobic, and hydrophobic–hydrophobic interactions, and structure-making/-breaking ability of the solute (AAs/peptide) in aqueous d-galactose solutions.

Keywords

Amino acids Density d-galactose Glycylglycine Interactions Refractive index Viscosity 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Anwar Ali
    • 1
  • Rajan Patel
    • 2
  • Shahjahan
    • 1
  • Nizamul Haque Ansari
    • 1
  1. 1.Department of ChemistryJamia Millia Islamia (Central University)New DelhiIndia
  2. 2.Centre for Interdisciplinary Research in Basic SciencesJamia Millia Islamia (Central University)New DelhiIndia

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