Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5410622 | Journal of Molecular Liquids | 2015 | 9 Pages |
Abstract
The densities, Ï of l-histidine and l-arginine in water and in aqueous-streptomycin sulphate [1% (0.0069 mol·kgâ 1) and 2% (0.0137 mol·kgâ 1) streptomycin sulphate in water] mixed solvents were measured at temperatures 293.15, 298.15, 303.15, 308.15, 313.15 and 318.15 K; and ultrasonic speed, u and viscosities, η of these solutions were measured at temperatures 298.15, 303.15, 308.15, 313.15 and 318.15 K and at atmospheric pressure. The Ï, u and η data have been used to calculate apparent molar volume, VÏ, limiting apparent molar volume, VÏ°, apparent molar compressibility, Ks,Ï, limiting apparent molar compressibility, Ks,Ï°, transfer volume, VÏ,tr°, transfer compressibility, Ks,Ï,tr°, and partial molar expansibility, EÏ°. The viscosity data have been used to determine Falkenhagen coefficient, A, Jones-Dole coefficient, B, free energy of activation of viscous flow per mole of solvent, Îμ1° # and per mole of solute, Îμ2° #. The calculated parameters have been discussed in terms of various solute-solute and solute-solvent interactions prevailing in these solutions. The structure making/breaking ability of the amino acids in the aqueous-streptomycin sulphate solution is also discussed.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Anil Kumar Nain, Monika Lather,