Abstract
Relative densities ρ–ρ0have been measured over an extended concentration range for aqueous solutions of glycylglycine andl-serine in the temperature range 298⩽ (T/K)⩽ 423 and the pressure range 0.10⩽ (p/MPa)⩽ 30.00. Apparent molar volumesVm,φ have been calculated from measured densities and have been used to estimate partial molar volumes at infinite dilution V0. Values of V0obtained for aqueous solutions ofl-serine in water have been combined with previously reported V0values for aqueous solutions of glycine, to obtain estimates of serine side chain contributions to partial molar volumes over an extended temperature and pressure range. The reported volumetric data of glycylglycine have been used to calculate the partial molar volume change associated with the formation of a peptide bond.
Published Version
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