Temperature dependent thermophysical investigations of uridine nucleoside in aqueous-lysine solutions at different temperatures

Thermophysical investigations have been carried out for uridine in water and water + lysine (0.01, 0.05 and 0.1 mol kg −1) solutions at different temperatures T=(303. 15, 308.15 and 313.15) K and 0.101 MPa. The measured density and speed of sound data were used to calculateapparent molar volume,V2,ϕ and compatibility κS,2,ϕof solute uridine in aqueous solution of lysine. The partial molar volume and compressibility (V2,φoand,κS,2,ϕ0) were computed using Masson’s and Gucker’s relation. The partial molar transfer volume and compressibility (ΔtV2,φoandΔtκS,2,φ0) has been calculated and discussed. The UV–VIS spectra of uridine in water and in aqueous-lysine solutions have been recorded in order to understand the molecular interactions. The results are interpreted in terms of solute-solvent/solute interactions. Hydration behavior of uridine nucleoside in aqueous solutions of lysine has also been evaluated.