1. ENVIRONMENTALLY PROTECTION BY PREPARING OF BIOMATERIALS BASED ON SYNTHETIC AND BIOPOLYMERS. Authors: MIHAELA HETVARY, MARIA SOMEȘAN, DANIELA STANCIU, RALUCA-NICOLETA DARIE, MARIA LUNGU, ELENA GROSU, ELISABETA ELENA TĂNASE, PETRUȚA STOICA, MARIA RÂPĂ.2. THE REDUCTION OF THE NITRATES FROM THE DRINKABLE WATER BY ELECTROCHEMICAL METHODS. CASE STUDY. Authors: SEVER VARVARI, SORIN CLAUDIU ULINICI, GABRIELA BĂISAN, MIHAELA HETVARY, GRIGORE VLAD, DUMITRU VÂJU.