The density, rho, ultrasonic speed, u and viscosity, eta of solutions of L-asparagine and L-glutamine in water and in aqueous-D-mannose (2.5% and 5% D-mannose in water, w/w) solvents were measured at temperatures (293.15, 298.15, 303.15, 308.15, 313.15 and 318.15) K and at pressure, p = 101 kPa. The rho and u values have been used to calculate apparent molar volume, V-phi, limiting apparent molar volume, V-phi(degrees), apparent molar compressibility, Ks, (phi), limiting apparent molar compressibility, K-s,(degrees)(phi), transfer limiting apparent molar volume, V-phi,tr(degrees), transfer limiting apparent molar compressibility, Ks,(degrees)(phi,tr), limiting apparent molar expansivity, E-phi(degrees), the Hepler constant, (partial derivative V-2(phi)degrees/dT(2)) and hydration number, n(H). The eta values have been used to calculate the Falkenhagen Coefficient, A, Jones-Dole coefficient, B, Gibbs energy of activation of viscous flow per mole of the solvent, Delta mu(degrees#)(1) and the solute, Delta mu(degrees#)(2). 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-mannose solution is also discussed. (C) 2015 Elsevier Ltd. All rights reserved.