79. World Federation of Scier.tific Workers, UNMBASURED HAZARDS. ScientificWorkers. 80. World Health Organization (United Nations) GENETIC EFFECTS OF RADIATION. WHO/11, 81. - ‘0p. (March 13, 1957) 3p. PressRelease, Yamada, Kinjiro; Tozawa, Harumi; Amano, Keishi; and Takase, Akira. STUDIES ON THE RADIOACTIVITY IN CERTAIN PELAGIC FIpp. III. SEPARATION AND CONFIRMATION OF Zn IN THE MUSCLE TISSUE OF A SKIPJACK. Gubletin-of—theJapaneseSosdotyof ScientificFisheries 20, no. 10, 921-26 (1955). Ashed sample of the muscle tissue of skipjack, which were caught by "Shunkotsu-Maru” on June 19th near Bikini Atoll was used for the present study. Ion exchanger method, using Dowex 50, was applied to separate radioactive elements with 0.2 N HCl, 0.5% . oxalic acid and 5% annonium citrate (pH 3.53, 4.18, 2tht, 4.60, 5.02, 5.63 and 6.42) as the eluents. Elution curve of the ashed muscle is shown in Figure l. Appreciable anounts of cathionic radioactive elements were separated by 0.5% oxalic and by 5% annonium citrate at the pH of 4.18 and also anionic radiouctive elements were obtained by 0.2N HCl.” , As the fraction, which can be withdrawn by annonium citrate as pH 4.18, was proved the most active; futher analysis was undertaken according to the schene cited in Figures 2 and 5. In addition to these chemical separation, absorption curve of this specimen witr. tin foil was examined Simpl taneously (Figure 3) and thus the radioactive Zn°? firmed to be present in the fish muscle. was con- Although it was difficult to detect radioactivity in rare- earth and alkaline-earth groups in the muscle tissue, attempts are being made for more precise exanuination. 82. Yamazaki, Fumio and Kakehi, K. ESTL.ATE OF RADIATION NOStS RECEIVED BY THE INDIVIDUALS ABCARD A CONTAMINATED FISEING BOAT. BadioAsotopes(Japan) 3, nce. 1, 4-6 (195%). A dose was estinated to be 120 r. in 2& hceurs or 270 r. in 13 days when caleulatea according t5 t7le2; rr 240 r. in 2& rours or 440 r. in 13 days when Calculuted uccordin~ co t7 Ley observed value of cecay, and Sup posin: exrosure to the radiation begun €é hou. s ufter the e ,Josion had oce.rred on Bikini.