1. MODELLING URANIUM(VI) EXTRACTION USING ARTIFICIAL NEURAL NETWORKS. Authors: MIRCEA-VASILE CRISTEA, MARIA CURTUI, CASTELIA CRISTEA.2. EXTRACTION OF ZIRCONIUM(IV) WITH TRITOLYLPHOSPHATE. Authors: MARIA CURTUI, LOREDANA SORAN.3. THE USE OF ORGANODITHIOPHOSPHORIC ACIDS FOR SEPARATION AND DETERMINATION OF SOME METAL IONS FROM RESIDUAL WATERS. Authors: MARIA-LOREDANA SORAN, MARIA CURTUI, IOVANCA HAIDUC, DIANA GHERMAN.4. TLC SEPARATION OF TH(IV) AND LANTHANIDES(III) ON VARIOUS STATIONARY PHASES USING HDEHDTP AS COMPLEXING AGENT. Authors: MARIA-LOREDANA SORAN, MARIA CURTUI, DIANA GHERMAN.