Home – Home – Jornals – Chemistry for Sustainable Development 2010 number 1

Thermodynamic and experimental studies were performed concerning phase formation process in the solution compositionally close to the oral fluid of humans with respect to the mineral and amino acid content. It has been established that amino acids to a considerable extent contribute into the ionic strength of the system promoting an increase in the electrostatic repulsion between the ions of the like charge and inhibiting the deposition of low-soluble calcium phosphates. In this process, the complexation of amino acids with Са²⁺ does not result in a decrease of the solution supersaturation level and in changing the sequence of salt precipitation. The experimental simulation results for hydroxyapatite crystallization process have demonstrated that the inhibiting effect of amino acids is caused by the adsorption interaction between ionized species and the surface of the solid phase.