1. BACTERIAL COMMUNITY STRUCTURE IN THE POLLUTED SOILS FROM CLUJ COUNTY (NORTH-WEST ROMANIA). Authors: CODRUŢA VIOLETA SIMULE, MIHAIL DRĂGAN-BULARDA.2. ASSESSMENT OF ENZYMATIC ACTIVITIES IN CONTAMINATED SOILS FROM CLUJ COUNTY (NW ROMANIA). Authors: CODRUŢA VIOLETA SIMULE, MIHAIL DRĂGAN-BULARDA.3. EFFECTS OF ZINC, LEAD AND CADMIUM POLLUTION ON THE STRUCTURE AND ACTIVITIES OF SOIL BACTERIAL COMMUNITY. Authors: CODRUŢA VIOLETA SIMULE, MIHAIL DRĂGAN-BULARDA.