Volume 7 No. 1 January – February, 2002 ROMANIAN BIOTECHNOLOGICAL LETTERS – an international journal – CONTENTS 1.ANTON CIUCUProgress and Perspectives in Biosensors for Environmental Monitoring ……………5372.ANA IONIŢĂ, M. MOSCOVICI, AURORA DRĂGOLICI, MIHAELA EREMIA, CĂTĂLINA BUCĂ, RADU ALBULESCU, IOANA PAVEL, MIHAELA CLAUDIA VAMANU Lipase Production in Discontinuous. Operation System Using a Candida lipolytica Strain ……………547 3.NATALIA CUCUAn Epigenetic Study of Bacterial NPTII Gene Expression in Agrobacterium Tumefaciens and A. Rhizogenes Mediated Potato Transformants ……………5534.ŢOLEA, I. Gh. TĂNASE, IULIA GABRIELA DAVID, MIHAELA BULEANDRĂ, G. L. RADUSome Similarities Between the Cell Membrane and Artificial Ion-Selective Membranes ……………5615.A. Vamanu, Gh. Câmpeanu, O. Popa, E. Vamanu, Ghinea Steluţa, Diaconu Lucia, Dobrovolski DoinaStudies on Obtaining a Probiotic Product Based on Mixed Microbian Biomass ……………5696.R.V. MALBAŠA, E. S. LONČAR, LJ. A. KOLAROV –Sucrose and Inulin Balance During Tea Fungus Fermentation …………… 5737.ANGELA MĂRCULESCU, CAMELIA SAND, C.H. BARBU, DANA BOBIŢ, DANIELA HANGANUPossibilities of Influencing the Biosynthesis and Accumulation of the Active Principles in Chrysanthemum balsamita L Species ……………5778.TATIANA VASSU, DIANA SMARANDACHE, ILEANA STOICA, ELENA SASARMAN, D. FOLOGEA, F. MUSAT, ORTANSA CSUTAK, ANA – MARIA NOHIT, OANA IFTIME, RALUCA GHERASIMBiochemical and Genetic Characterization of Lactobacillus Plantarum cmgb – 1 Strain Used as Probiotic ……………5859.Diary of Events ……………59910.Other Informations ……………602 Cover: The Bucharest University Building