oe * 5& “1Bie ob, pandarua, spinach, ahd vorinda, he bigaewere collected f “spoth in the shallow waternear shore and in the deeper water of the lagoon, usuallyin thevicinityof the fish-collecting | * stations. } Sample values are given in appendixTablea ry, y, VI and VII. ‘From these tables it can be seen that the activity varies widely ‘even within samplea of the same kind. In January, for example, ‘the pulp from onepapaya had an activity of 3.6 x 107! ue/e (wet), | Sthe highest level found in any edible plant portion on that date, : ‘while the mu freaa second papaya specimen had an aobivity : ef 1.3 x 107T we/e (wet). i a Inboth edibleand non~edible plantsthe specifie activity |. i ‘Wag higher in the leaves than in the fruit,the difference gen- i erally being two to eightfold.. Much of the activity inthe i : “Maren 1954plant sampleswasprdabably due to surfacecontamina' ctden. | : High counte in the internal portions of stems, however, indicated rapld uptake of fission producte by absorption through © the reot systems, Latercollections alaoindicateuptake of fiesion product material within the leaf tissue. For example, leaf buds formed afterthe initial falloutcontainas much it 5 | : mn activity as do older leaves, and washing removes very little of | Se RR SN | ob the activity. In theearliest collectionsthe bark ofshrubs and trees |cand the epidermis of edible plant parte contained from.ié to 40 ‘times moreactivity than the internal parts. Tn: the later. col- eotions, however,this ratiowasalways lewd than two,.It 4s ob definitely knows,-hoWever, whether differential uptake or i