1. DIFFERENT GEOMETRIES FOR MINIATURAL MASS SPECTROMETERS. Authors: C. CUNA, B. TUZSON, D. IOANOVICIU.2. THE ASSESSMENT OF THE QUALITY OF THE FOOD BY 13C ISOTOPE RATIO MASS SPECTROMETRY. Authors: STELA CUNA, C. CUNA, GABRIELA BALAS, FILOFTEIA GAFTOI.3. HOW ALTERATION OF ELECTRIC PARAMETERS CAN DETERIORATE TIME-OF-FLIGHT MASS SPECTROMETER PERFORMANCE. Authors: D. IOANOVICIU, V. COSMA, C. CUNA, M. KAUCSÁR, A. PAMULA, B. TUZSON.4. USING STABLE ISOTOPES TO IDENTIFY GEOGRAPHICAL ORIGIN OF WINES. Authors: STELA CUNA, C. CUNA, GABRIELA BALAS, O. COZAR.