Ultrasonic, volumetric and viscometric investigations have been conducted o
n adenosine base at three different temperatures 303.15, 308.15 and 313.15
K. The partial molal volume phi(nu)(0), partial molal compressibility phi(k
)(0), the viscosity coefficient B of the Jones-Dole equation and the solute
activation parameters Delta U, Delta S and Delta H have been calculated. A
n attempt has been made to explain the changes in water structure when a co
-solvent is added. Further, the results of viscosity experiments are tested
in terms of transition state theory.