In this work, we present experimental results for partial molar volumes and viscosities of aqueous solutions of α-dl-aminobutyric acid, dl-norvaline and dl-norleucine at 288.15, 293.15, 298.15 and 303.15 K. The thermodynamic behavior of aqueous amino acid solutions is compared with that reported for glycine and α-alanine in water and is discussed in terms of group additivity and electrostriction. The temperature dependence of the infinite dilution partial molar volumes and the B viscosity coefficients are interpreted in terms of amino acid hydration. According to the usual hydrophobicity criteria, the amino acids considered do not have a hydrophobic character and their behavior is dominated by the polar groups.

Cyclodextrins (CDs) are cyclic oligosaccharides that contain at least six d–(+)–glucopyranose units linked by α–(1, 4) glucosidic bonds

Surface tension of aqueous solutions of 1-propanol (nP), 1,2-propanediol (12PD), 1,3-propanediol (13PD) and 1,2,3-propanetriol (123PT) were measured using the method of capillary rise as a function of concentration at 298.15 K with emphasis in the very dilute region. The decrease of surface tension with mole fraction of alcohol becomes less pronounced as the number of OH groups increases. The surface enrichment effect, reflected by the slopes for the curves of surface tension versus composition, is correlated with the number of hydroxyl groups in the solute and the hydrophilic character of the solutes.