1. SPATIAL AND TEMPORAL VARIATIONS OF ENZYMATIC ACTIVITY IN BIOFILMS OCCURRING INTO A DRINKING WATER TREATMENT PLANT IN CLUJ, ROMANIA. Authors: ANCA FARKAS, MIHAIL DRĂGAN-BULARDA, VASILE MUNTEAN, RAHELA CARPA.2. EFFECT OF DIFFERENT DISINFECTANTS AGAINST BIOFILM BACTERIA. Authors: CORNELIA CRĂCIUNAȘ, MIHAIL DRĂGAN-BULARDA, BRÎNDUȘA BOCOȘ, ANCA FARKAS.3. GENETIC STABILITY ASSESSMENT OF IN VITRO PLANTS BY MOLECULAR MARKERS. Authors: VICTORIA CRISTEA, ANCA FARKAS, ANCA BUTIUC-KEUL.4. NITRATE, NITRITE AND MICROBIAL DENITRIFICATION IN DRINKING WATER FROM OZUN VILLAGE (COVASNA COUNTY, ROMANIA) AND THE ASSOCIATION BETWEEN CHANGES DURING WATER STORAGE. Authors: ORSOLYA-CSILLA RÁDULY, ANCA FARKAS.5. SCREENING FOR PHENOTYPIC AND GENOTYPIC RESISTANCE TO ANTIBIOTICS IN GRAM POSITIVE PATHOGENS. Authors: ANCA BUTIUC-KEUL, BRÎNDUŞA BOCOŞ, CORNELIA CRĂCIUNAŞ, EMMA TARCO, ANCA FARKAS.6. PRELIMINARY DATA REGARDING GENETIC DIVERSITY OF SEVERAL ENDANGERED AND ENDEMIC DIANTHUS SPECIES FROM ROMANIA GENERATED BY RAPD MARKERS. Authors: VICTORIA CRISTEA, ANCA FARKAS, IRINA HOLOBIUC, IRINA GOIA, LILIANA JARDA, ANCA-LIVIA BUTIUC-KEUL.