-59- AECD-3446 Boerhavia repens L. (B, diffusa L.) Pemphis acidula Forst. Terminalia litoralis Seem. BORO ISLAND Suriana maritima L, "§8: Triumfetta procumbens Forst. f. Konop. Wk Pisonia grandis R. Br. +. Messerschmidia argentea (L. f.) ILM. Johnston - Cassytha filiformis L. - Lepturus repens R. Br. . Scaevola frutescens (Mill.) Krause ’ Guettarda speciosa L. , Portulaca oleracea L. $ “RADIOACTIVITY OF BIKINI SAMPLES: f A preliminary survey of the plant materials collected showed the activity | “rttebe of very low order; consequently, it was considered desirable to convert the ‘Gpression of all results to an ash basis rather than to a dry weight basis. This “ould remove the effects of the relatively variable carbohydrate or fatty material Pe.‘fom consideration and place comparisons on a strictly ash basis, which is the faction in which the radioactivity resides. . 2HTee On this basis better comparisons with atrol material could be made. ® As the counting was to be done in an "internal" sample counter, «40 would r “:fontribute to the total counts but would not, of course, have its origin in the bomb f Material, Other radioactive materials are present in small quantity in all plants —~-§ ~pown ii n a natural environment where uranium andits-decomposition products are. ‘Phesent. In some plants grown onthe soils of the Columbia Plateau of Washington, -ithas been found that «70 constitutes about one-half of the naturally-occurring Uranium and its decomposition products make 3 oo is 1 eA (. - eblioactivematerial in the plants.