Abstract
Protolytic equilibria in aqueous solutions of D,L-alanyl-D,L-serine are studied by means of potentiometry and calorimetry. The dissociation constants and thermal effects of this reaction of the dipeptide are determined at 298.15 K and ionic strengths of 0.1, 0.3, 0.5, and 1.0 (KNO3). The standard thermodynamic characteristics (pK°, ΔrG°, ΔrH°, and ΔrS°) of the studied equilibria are calculated. The final results are compared with the corresponding data on the related compounds.
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