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摘要
Densities, rho, ultrasonic speeds, u, and viscosities, g of solutions of glycine/l-alanine/l-valine/l-isoleucine in water and aqueous-streptomycin sulfate {1% (0.0069 mol.kg(-1)) and 2% (0.0137 mol.kg(-1)) streptomycin sulfate in water} mixed solvents were measured at T (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K and atmospheric pressure. From these experimental results, the apparent molar volume, V-phi, limiting apparent molar volume, V-phi(boolean AND) /and the slope, S-v, apparent molar compressibility, K-s,(phi), limiting apparent molar compressibility, K-s,phi(degrees) and the slope, S-k, transfer volume, V-phi,V- (degrees)(tr), transfer compressibility, K-s,phi,tr(degrees), limiting apparent molar expansivity, E-phi(degrees), Falkenhagen Coefficient, A, Jones-Dole coefficient, B, hydration number, n(H), and temperature derivative of B-coefficient, dB/dT were calculated. Also, the activation parameters such as the free energies of activation of viscous flow per mole of solvent, Lambda mu(degrees#)(1) and per mole of solute, Delta mu(degrees#)(2), were calculated and discussed in terms of transition state theory. The results are interpreted in terms of (solute + solvent) and (solute + solute) interactions in these systems. It has been observed that all these amino acids act as structure-breaker in aqueous-streptomycin sulfate solvents. In addition to this, V-phi(degrees), K-S,phi(degrees), B and Delta mu(degrees#)(2) have been split into group contributions of the amino acids using linear correlation with number of carbon atoms in the alkyl chain of the amino acids.
- 出版日期2016-4
