- 著者
- 山県 登
- 出版者
- 日本放射線影響学会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.3, no.3, pp.158-169, 1962-09
- 被引用文献数
- 1 7
Measurements were made of potassium, rubidium and cesium in a variety of Japanese diet samples to know the fate of these elements in food chain. Each component of the diet contributes potassium evenly to the diet, however, almost a half of cesium is estimated to be contributed by meat, eggs and milk products. Thus, the daily intake of cesium varies greatly depending on the dietary intake of this component. The daily intake by the Japanese adults as a whole is estimated as 1. 4 g of potassium, 1. 5 mg of rubidium and 0. 01 mg of cesium per person. The biological half-lives are estimated as 54, 140 and 76 days, respectively, for potassium, rubidium and cesium on the basis of the balance between the human body and diet assuming a single exponential function of excretion.
- 著者
- 山県 登
- 出版者
- 日本放射線影響学会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.3, no.1, pp.9-30, 1962-03
- 被引用文献数
- 3 41
Measurements have been made of potassium, rubidium and cesium in the human soft tissues, muscles and bones from autopsies to determine the normal concentrations of these elements and to estimate the total body amount. The individual variability of concentration increases in the following order : K Rb Cs and the distribution pattern of potassium in muscle suggests a normal distribution and the observed distribution of stable cesium and the Cs/K ratio in muscle appear to be lognormal. A fairly good agreement is observed in rubidium data with those reported by other workers, however, discrepancy in cesium data is observed between the author and other workers. The amount of potassium, rubidium and cesium in the total body estimated from the concentrations of these elements in the soft tissues, muscle and bone is, respectively, 136±28 grams, 0.36±0.09 grams and 1.4×10^<-3> grams (95% probable range : 0.50-4.1×10^<-3>) for the standard man of 70 kg body weight.
- 著者
- 山県 登 小平 潔 速水 泱
- 出版者
- 日本放射線影響学会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.3, no.3, pp.182-192, 1962-09
- 被引用文献数
- 2
Measurements have been made of the cesium-137 content in human musle, total diet and cereals collected in Japan during the period from February 1960 to May 1962. The simple methods of evaluation of mean levels in the human body are proposed which are based on the distribution studies on the common cesium irrespectively of potassium concentration or the cesium unit. The total body burden was estimated as 3. 2-4. 0 mμc for the period from August 1960 to January 1962 and it rose up to 7. 6 mμc in March 1962 in correspondence with the increased fallout deposition rate in Autumn 1961. The daily intake of cesium-137 by Japanese people was 29 μμc, on average, for the period from August 1960 to August 1961 and increased to 50 μμc in February 1962. The contribution of cesium-137 by cereals to the total intake was estimated as approximately 40% for the period from November 1960 to November 1961 and it decreased to 32% in February 1962. The relative decrease was attributed to the increase in the daily intake, probably other than cereal, through leafy vegetables.
- 著者
- 山県 登 岩島 清 永井 輝夫 渡利 一夫 飯沼 武
- 出版者
- Journal of Radiation Research 編集委員会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.7, no.1, pp.29-46, 1966 (Released:2006-08-29)
- 参考文献数
- 13
- 被引用文献数
- 9 13
Two single doses of coupled radioisotopes of 132Cs-86Rb and 132Cs-42K were orally administered to a human subject. Body retention, urinary and fecal excretions as well as the plasma and erythrocytes contents of radioisotopes were determined. The proportion of urinary to fecal excretion was found different in cesium and rubidium, the urinary excretion being 85.3% of the total in the former and only 68.1% in the latter. Loss of cesium in the sweat amounted to 1.5 and 3.5% of the total excretion for the first two days. Uptake by the plasma of oral dose was rapid and the whole blood content reached max. 11.4% of the dose of cesium at 1 hour, while 2.9 and 2.4% respectively of rubidium and potassium was reached. The levels in the erythrocytes seemed to grow at a slower rate in cesium than in the other alkali elements. The different feature of blood metabolism found in the alkali elements was interpreted by the slow rate of clearance of ingested cesium from blood. Daily fluctuations of fall-out 137Cs in blood and the errors involved in the assessment of the total body burden of 137Cs by blood analysis were also discussed.
- 著者
- 山県 登
- 出版者
- Journal of Radiation Research 編集委員会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.3, no.1, pp.9-30, 1962-03-01 (Released:2006-08-29)
- 参考文献数
- 10
- 被引用文献数
- 27 41
Measurements have been made of potassium, rubidium and cesium in the human soft tissues, muscles and bones from autopsies to determine the normal concentrations of these elements and to estimate the total body amount. The individual variability of concentration increases in the following order : K Rb Cs and the distribution pattern of potassium in muscle suggests a normal distribution and the observed distribution of stable cesium and the Cs/K ratio in muscle appear to be lognormal. A fairly good agreement is observed in rubidium data with those reported by other workers, however, discrepancy in cesium data is observed between the author and other workers. The amount of potassium, rubidium and cesium in the total body estimated from the concentrations of these elements in the soft tissues, muscle and bone is, respectively, 136±28 grams, 0.36±0.09 grams and 1.4 × 10-3 grams (95% probable range : 0.50—4.1 × 10-3) for the standard man of 70 kg body weight.
- 著者
- 山県 登 山県 頴子 松田 俊治
- 出版者
- 一般社団法人 日本土壌肥料学会
- 雑誌
- 日本土壌肥料学会講演要旨集 (ISSN:02885840)
- 巻号頁・発行日
- vol.4, 1958
- 著者
- 山県 登 小平 潔
- 出版者
- 一般社団法人日本土壌肥料学会
- 雑誌
- 日本土壌肥料学会講演要旨集 (ISSN:02885840)
- 巻号頁・発行日
- no.8, 1962-04-01
- 著者
- 津郷 友吉 野崎 博 浅利 民弥 山県 登
- 出版者
- 日本放射線影響学会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.5, no.2, pp.131-137, 1964-06
In succession of the previous report (1), the measurements of strontium-90 (Sr-90), cesium-137 (Cs-137) and iodine-131 (I-131) concentrations in milk were carried out in order to evaluate the range of the radioactive contamination of milk in Japan since 1961. Farm milks collected from various districts of Japan monthly from 1961 to 1963 were used for radioactivity assay. The results of observation show the Sr-90 concentration in milk is higher than that in the previous years (1957-1960) all over the country and there is regional variation in Sr-90 and Cs-137 concentrations.