1. CHEMICAL COMPOSITION OF SOME ROMANIAN BOTTLED NATURAL MINERAL WATERS. Authors: ELFRIDA MARIA CARSTEA, CLAUDIU TANASELIA, MIRELA MICLEAN, MARIN SENILA, MARIA-ALEXANDRA HOAGHIA, ERIKA ANDREA LEVEI.2. OPTIMIZATION OF GOLD SORPTION FROM AMMONIACAL THIOSULPHATE SOLUTION ON ANION EXCHANGE FIBER USING TAGUCHI EXPERIMENTAL DESIGN. Authors: EMILIA NEAG, ANAMARIA IULIA TÖRÖK, ZAMFIRA DINCA, MARIN SENILA, CERASEL VARATICEANU, ERIKA ANDREA LEVEI, EKATERINA SHILOVA, FRANCOISE BODENAN.3. LEAD ISOTOPIC RATIO DETERMINATION IN CAVE SEDIMENTS USING TRIPLE-QUADRUPOLE INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY. Authors: CECILIA ROMAN, ERIKA ANDREA LEVEI, BOGDAN ANGYUS, ANA MOLDOVAN, CLAUDIU TĂNĂSELIA, ANAMARIA IULIA TÖRÖK.