Biosorption of 241 Am by apical shoots of Elodea Part of the shoot 241 Am content 241 Am in the biomass 241 Am per unit area Bq% of totalkBq/gBq/cm 2 Apical leaves8.7±0.710.3±1.21.5±0.40.8±0.1 Distal leaves58.7±3.669.5±2.95.2±1.12.6±0.6 Stem17.1±2.52