Abstract

ROMERO, Carmen M  and  BELTRAN, Alejandro. EFFECT OF TEMPERATURE AND CONCENTRATION ON THE VISCOSITY OF AQUEOUS SOLUTIONS OF 3-AMINOPROPANOIC ACID, 4-AMINOBUTANOIC ACID, 5-AMINOPENTANOIC ACID,6-AMINOHEXANOIC. Rev.Colomb.Quim. [online]. 2012, vol.41, n.1, pp.123-131. ISSN 0120-2804.

In this work we present the effect of temperature on the viscosities of aqueous so-lutions of 3-aminopropanoic acid, 4-ami-nobutanoic acid, 5-aminopentanoic acid and 6-aminohexanoic acid as a function of concentration. The experimental mea-surements were done from 293.15 K to 308.15 K. At each temperature the experimental data were fitted to the Tsangaris-Martin equation and the B viscosity coefficient was determined. The dependence of the B coefficients on the number of carbon atoms of the amino acids is linear, so the contribution of polar and apolar groups was established. The results are interpreted in terms of amino acid hydration.

Keywords : Amino acid; viscosity; hydrophobic hydration; solute-solvent interactions.

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