p. 189 - 199 EXPERIMENTAL DATA ON 59 Fe, 65 Zn AND 89 Sr UPTAKE BY Enteromorpha linza AND Cystoseira barbata FROM THE ROMANIAN BLACK SEA SHORE A. S. Bologa 1)and I. Chiosila 2) 1) Romanian Marine Research Institute Constanta 2) Clinical Hospital Fundeni, Section of Radiobiology Bucuresti Abstract The following maximum concentration factors for the green alga Enteromorpha linza L. and the brown alga Cystoseira barbata (Good. et Wood.) Ag. from the Romanian Black Sea shore were experimentally determined: for 59Fe =3,227 and 453 (August), respectively; for 65Zn= 7,147 and 2,444 (August) respectively; for 89Sr=65 and 120 (June), respectively.