Densities, rho, ultrasonic speeds, u, and viscosities, eta, of solutions of l-methionine in aqueous-sucrose solvents (5%, 10%, 15%, and 20% of sucrose, w/w in water) were measured at T = (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K. From these experimental results, the apparent molar volume, V-phi, limiting apparent molar volume, V degrees(phi) and the slope, S-v, apparent molar compressibiliity, K-s,K-phi, limiting apparent molar compressibility, K degrees(s,phi) and the slope, S-k, transfer volume, V degrees(phi,tr), transfer compressibility, K degrees(s,phi,tr), Falkenhagen coefficient, A, Jones-Dole coefficient, B and temperature derivative of B-coefficient, dB/dT, hydration number, H-n, free energy of activation of viscous flow per mole of solvent, Delta mu degrees(#)(1) and per mole of solute, Delta mu degrees(#)(2) were calculated. The results are interpreted in terms of solute-solvent and solute-solute interactions in these systems. It is observed that there exist strong solute-solvent interactions in these systems, which increase with increase in sucrose concentration. It is observed that l-methionine act as structure-breaker in aqueous-sucrose solvents. The thermodynamics of viscous flow has also been discussed. (C) 2012 Elsevier Ltd. All rights reserved.