1. XRD AND IR INVESTIGATIONS OF SOME COMMERCIAL POLYSTYRENE SAMPLES THERMALLY DEGRADED. Authors: CARMEN NICULĂESCU, LOREDANA OLAR, RĂZVAN STEFAN, MIHAI TODICA, CORNEL-VIOREL POP.2. THE INFLUENCE OF V2O5 ON SPECTROSCOPIC AND OPTICAL PROPERTIES OF MgO-KPO3 GLASSES CO-DOPED WITH Ag2O. Authors: LEONTIN DAVID, VASILE POP, LOREDANA OLAR, LIVIU CALIN BOLUNDUT, CRISTINA SOMESAN.