1. PRELIMINARY RESULTS IN THE STUDY OF THE ECOSYSTEMS IN POLAR AREAS USING STABLE ISOTOPES. Authors: STELA CUNA, TEODOR NEGOITA, PETRE BERDEA, GABRIELA BALAS, CORNEL CUNA, NICOLAE LUPSA, VALENTIN MIREL.2. ISOTOPE RATIO MASS SPECTROMETRY: ANALYSIS OF WINES FROM DIFFERENT ROMANIAN REGIONS. Authors: STELA CUNA, GABRIELA BALAS, NICOLAE LUPSA, VALENTIN MIREL, ALINA MAGDAS.