p. 71 - 81 THE INFLUENCE OF SOME DIFFERENT ORGANIC EXTRACTS ON THE METABOLISM OF THE MARINE CHLORELLA SP. FROM THE BLACK SEA Pia Elena Mihnea and Iulia Voinescu Romanian Marine Research Institute Constantza Abstract Organic extracts of different origin and various concentrations have influence on the division rate as well as on the cellular products content. Division rate and protein content has increased proportio- nally to addition of yeast extract in 10 to 150% concentration. Division rate was stimulated by addition of mussel extract in 10 to 50% concentration. Protein synthesis is directly proportionally to organic extract concentration. Our experiment has proved that yeast extract has a stronger effect than mussel extract.