1. GROWTH RATE OF HYDROXYAPATITE CRYSTALS OBTAINED BY PRECIPITATION. Authors: PAUL ŞERBAN AGACHI, BOGYA ERZSÉBET SÁRA, ANA-MARIA CORMOŞ, REKA BARABAS, VALENTINA ROXANA DEJEU.2. APPLICATION OF NUMERICAL METHODS IN THE TECHNOLOGY OF HYDROXYAPATITE. Authors: PAUL ŞERBAN AGACHI, REKA BARABAS, SILVIA TOADER, VALENTINA ROXANA DEJEU.3. STUDY OF THE HYDROGEN PEROXIDE BASED WHITENING GEL ON THE CORROSION OF DENTAL METALLIC ALLOYS. Authors: MARIANA CONSTANTINIUC, ANA ISPAS, DANIELA POPA, REKA BARABAS, GRAZIELLA L. TURDEAN, IOANA CARMEN FORT.