1. COMPUTATIONAL INVESTIGATION OF SPECTROSCOPIC PARAMETERS IN PUTATIVE SECONDARY STRUCTURE ELEMENTS FOR POLYLACTIC ACID AND COMPARISON WITH EXPERIMENT. Authors: IZABELLA IRSAI, ALEXANDRU LUPAN, CORNELIA MAJDIK, RADU SILAGHI-DUMITRESCU.2. POLYLACTIC ACID INTERACTIONS WITH BIOCERAMIC SURFACES. Authors: RADU SILAGHI-DUMITRESCU, ADRIAN M.V. BRÂNZANIC, IZABELLA IRSAI.3. POLYLACTIC ACID INTER-CHAIN INTERACTIONS. Authors: IZABELLA IRSAI, SZILÁRD ZOLTÁN PESEK, RADU SILAGHI-DUMITRESCU.