Volume 8 No. 1 January – February, 2003 ROMANIAN BIOTECHNOLOGICAL LETTERS – an international journal – CONTENTS 1.DELIA-IRINA COROL, I. I. DOROBANTU, N. TOMA, ROZALIA NITUDiversity of Biological Functions of Carotenoids……………10672.C. VOINEA, A. CIUCU, C. CIUCU, N. VOICULEŢ Affinity Biosensor for Antitumoral Drugs Determination……………10753.Monica Neagu, Gina Manda, Alexandra Livescu, Carolina Constantin, MARINA T. NICHIFOR, ISABELA TAMSULA, MONICA POPESCU, Cristina Tanaseanu The Involvement of Reactive Oxygen Species in the Development of Unstable Angina……………10834.STANCIC-ROTARU , M. MITITELU, M. CRASMARU, D. BALABANSpectroanalytical Profile of Flavonoids from Chelidonium majus L……………10935.I. DOROBANTU, DELIA-IRINA COROLThe Antiprogesterone Antibody – Progesterone System; RIA Method in Evaluation of Some Kinetic and Thermodynamic Parameters……………11016.OLIMPIA MARIANA MICU, OANA ADRIANA JINGA, ANCA VALUTA, IOANA JITARUAliphatic and Piperidinic Phenothiazine Drugs as Ligands for Copper(II) Ions……………11097.Călina Petruţa Cornea, Irina Grebenişan, Rodica Mateescu, Vamanu, E, Câmpeanu, G.Isolation and Characterization of New Bacillus spp. Strains – Useful as Biocontrol Agents of Plant Pathogens……………11158.S. BUZATU, V. DARIEIs the Facilitated Diffusion Exclusively a Passive Membrane Transport Mechanism?……………11239.ENUTA IORGA, NASTASIA BELC, ALEXANDRU STANCOV, ENACHE, GH. CAMPEANU Synergistic Effect of Bacterial and Fungal Amylases on Breadmaking……………112910.Gina Manda, Monica Neagu, Alexandra Livescu, Carolina Constantin, C. Codreanu, Marina NechiforReceptor and Dose-Dependent Effects Exerted In Vitro by Methotrexate on Human Immune Cells……………113911.Diary of Events……………1055 Cover: The Bucharest University Building