The physicochemical properties and the formation, stability, and dissociation constants of complexes of poly acids with organic bases possessing physiological activity were determined by methods of potentiometric titration, conductometry, and equilibrium dialysis, and by biological methods. The relationship between the level of physicochemical characteristics of complexes and the possibility of predicting the prolonged pharmacological (antimicrobial, anaesthetising) action of physiologically active substances in complexes with polymers was established.
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