1. NO2 DETERMINATION FROM AMBIENT AIR IN URBAN MEDIUM BY UV-VIS SPECTROMETRY AND CHEMILUMINESCENCE METHODS. Authors: DANA FLORINA MUNTEAN, DUMITRU RISTOIU.2. PHYSICO-CHEMICAL STUDY CONCERNING ATMOSPHERIC PARTICULATE MATTER HAZARD . Authors: IOAN PETEAN, AURORA MOCANU, GERTRUD-ALEXANDRA PALTINEAN, RALUCA ŢĂRCAN, DANA FLORINA MUNTEAN, LIANA MUREŞAN, GEORGE ARGHIR, MARIA TOMOAIA-COTISEL.3. MICRO AND NANO ORGANIZATION OF ATMOSPHERIC PARTICULATE MATTER IN GRIGORESCU DISTRICT OF CLUJ-NAPOCA. Authors: IOAN PETEAN, GERTRUD-ALEXANDRA PALTINEAN, AURORA MOCANU, DANA FLORINA MUNTEAN, LIANA MURESAN, GEORGE ARGHIR, MARIA TOMOAIA-COTISEL.