1. AMORPHOUS LANTHANUM ALUMINOBORATES INVESTIGATED BY THERMAL ANALYSIS AND FTIR SPECTROSCOPY. Authors: S. SIMON, R. GRECU, VIORICA SIMON.2. SPECTROSCOPIC INVESTIGATION OF THE ELECTRON DELOCALIZATION AND MOLECULAR CONFORMATIONAL CHANGES IN POLYPYRROLE INDUCED BY DIFFERENT DOPING IONS. Authors: R. TURCU, R. GRECU, M. BRIE, I. PETER, A. BOT, W. GRAUPNER.3. SPECTROSCOPIC INVESTIGATION OF SOME POLYMORPHIC DRUGS. PART I. INDOMETHACINE. Authors: IOAN BRATU, R. GRECU, G. BORODI, FELICIA GOZMAN-POP, MARIUS BOJITA.4. SOLID-STATE NMR AND FTIR CHARACTERIZATION OF 3-MERCAPTOPROPYL SILICA GEL R. Authors: VIRGINIA COMAN, R. GRECU, JÜRGEN WEGMANN, STEFAN BACHMANN, KLAUS ALBERT.5. SPECTROSCOPICAL CHARACTERISATION OF PRECURSORS FOR CALCIUM HYDROXIDE SYNTHESIS. Authors: CRINA DAN, ELISABETH-JEANNE POPOVICI, LAURA UNGUR, LIGIA PASCU, CRISTINA CIOCAN, R. GRECU.6. SPECTROSCOPICAL INVESTIGATION OF SOME CALIX[N]ARENES DERIVATIVES UTILISABLE AS METAL EXTRACTING AGENTS. Authors: CRISTINA CIOCAN, ELISABETH-JEANNE POPOVICI, CRINA DAN, MARIA VĂDAN, R. GRECU, N. POPOVICI.