Japan (Continued) G/R.61 (Add.1) TABLE 1(2) TO ABOVE REPORT: EXPERIMENTAL DATA WITH 8 RADIATION G/R.62 RADIOCHEMICAL ANALYSIS OF Sr® AND Cs‘! Discusses methods of radiochemical analysis of Sr® and Cs'8", including separation of strontium by precipitation and by ion exchange. Experiments for determining the best conditions for ion exchange separations are reported. G/R.63 REVIEW OF THE RECENT RESEARCHES ON THE BIOLOGICAL EFFECTS OF IONIZING RADIATION IN JAPAN Contains brief abstracts of 55 papers from the Japaneseliterature dealing with (1) research on biological indicators of the effects of ionizing radiation in small and large doses, and (2) research on counter measures to alleviate radiation injury. Classical and more modern morphological, histochemical, and biochemical methods of observation were used for the assessment of radiation damage. Most studies were performed on mammals. It is emphasized thatit is very difficult to obtain reliable biological indicators of damage by small doses and that hematological methods are still the most suitable in man. G/R.70 RADIOLOGICAL DATA IN JAPAN G/R.70 Correction to above document. (Corr.1) G/R.135 ANALYSIS OF Sr*’, CAESIUM-137 AND Pu?*? IN FALLOUT AND CONTAMINATED MATERIALS The report gives radiochemical procedures for Sr®*, Cs'3", and Pu?®* from air filter ash. The counting equipment is described briefly. G/R.136 PRIMARY ESTIMATE OF THE DOSE GIVEN TO THE LUNGS BY THE AIRBORNE RADIOACTIVITY ORIGINATED BY THE NUCLEAR BOMB TESTS The report gives method and results of measurement of airborne radioactivity for Tokyo from 1955-1957. Values are obtained for gross alpha and beta concentrations and radiochemically determined concentrations of Sr® and Pu?*®_ A method for computation of the dose to the lungs is described. The mean dose during 1955-1957 was of the order of magnitude of 107? rem/year. G/R.136 (Corr.1) Correction to above report. G/R.137 A MEASURE OF FUTURE STRONTIUM-90 LEVEL FROM EARTH SURFACE TO HUMAN BONE Calculation of the future Sr®’ level is made on the basis of present data on cumulative ground deposit and food contamination. The cumulative ground deposit (mc/km?’) is calculated assumingthat: 1. The total amount of fission products from future tests is known. 2. 20% of airborne Sr®falls to the earth’s surface every year. 3. The distribution of fallout is homogeneous. The metabolism of Sr*° through the food channel and food habit factor related to calcium and strontium source are taken into consideration. The future human skeletonal dose and maximum permissible level of ground deposit are then calculated. G/R.138 SUPPLEMENTAL REVIEW OF THE RECENT RESEARCHES ON THE ALLEVIATION OF RADIATION HAZARDS This is an addition to G/R.63 and gives abstracts of new developments of radiobiology in Japan. Work on protection by amino acids, cystamine and some new derivatives of this last compound is reported. Work on the therapeutic effect of a protein diet and of adrenochrome preparation is also reported. 183