Densities, Speeds of Sound, and Viscosities of (L-Proline plus Aqueous Glucose) and (L-Proline plus Aqueous Sucrose) Solutions in the Temperature Range (298.15 to 323.15) K

Densities (rho), speeds of sound (u), and viscosities (eta) of L-proline in 1 mol.L-1 aqueous glucose/1 mol.L-1 aqueous sucrose solutions have been measured as a function of molal concentration of L-proline at temperatures of (298.15, 303.15, 308.15, 313.15, 318.15, and 323.15) K. Using the rho and u data, the partial molar volumes (phi(o)(v)), transfer partial molar volumes (Delta(tr)phi(o)(v)), isentropic compressibilities (kappa(s)), partial molar isentropic compressibilities (phi(o)(k)), and transfer partial molar isentropic compressibilities (Delta(tr)phi(o)(k)) have been computed. The viscosity B-coefficients of the Jones Dole equation also have been computed. The kappa(s) values decrease with increase in molal concentration of L-proline and also with increase in temperature. The phi(o)(v) increase and phi(o)(k), decrease with an increase in temperature. The Delta(tr)phi(o)(v) values increase and Delta(tr)phi(o)(k) values decrease with an increase in temperature. The trends of variations of experimental and computed parameters have been discussed in terms of hydrophilic-ionic group and hydrophilic-hydrophobic interactions operative in the systems.