Volume 11 No. 1 January – February, 2006 ROMANIAN BIOTECHNOLOGICAL LETTERS – an international journal – CONTENTS 1.NICOLETA FLORENTINA PREDESCU, SILVIA IGA, DUMITRU PETRU IGA, FLORIN BADEASynthesis, Enzymatic Cleavage and Chemical Sulfation of Cholesteryl-ß-D-glucopyranoside ……………25212.MIOARA VARGAAn application of probabilistic calculus to a problem of genetics ……………2529 3.DAN CAŞCAVAL, ANCA-IRINA GALACTION, STEFĂNICA CĂMĂRUŢ, MARIUS TURNEAEvaluation of the hydrodynamic regime of aerobic stirred bioreactors using the mixing distribution criteria. 1. Simulated broths ……………25374.POPA, RADIANA TAMBA-BEREHOIU, GH. CÂMPEANU, TĂPĂLOAGĂ, VASILICA STAN, A. IANCUThe influence of a L-cystein containing conditioner upon strong flours ……………25495.M. RISCA, G. ZBANCIOC, C. MOLDOVEANU, G. DROCHIOIU, I. MANGALAGIU Effect of some new monoquaternary salts of diazine on germination and seedling growth of Norway spruce (Picea abies (L.) Karsten) ……………25636.VERONICA LAZAR, MARIANA-CARMEN BALOTESCU, ELISABETA GHERGHEATA, DOINA BULAI, RAMONA CERNAT, CATALINA BUCUR, ELENA SASARMANAlternative ecological strategies used in the prevention and treatment of infections produced by antibotic multiresistant bacterial strains ……………2569 7.Ortansa Csutak, Ileana Stoica, Raluca Ghindea, Ana-Maria Nohit, Diana Pelinescu, Tatiana VassuMolecular taxonomy studies on some yeast strains with biodegrading abilities ……………25798.POPA, C. P. CORNEA, A. BREZEANUInfluence of Different Agrobacterium rhizogenes Strains on Hairy Roots Induction in Eustoma grandiflorum ……………25879.DANIELA JUDET, FLORENTINA MATEI -RADOI, M. BENSOUSSAN, STEFANA JURCOANEStudies on Aspergillus flavus growth and toxicity ……………259310.Call for papers ……………259911.Instructions for Authors ……………2601 Cover: The Bucharest University Building