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- W236542007 abstract "The Sr/sup 90/ content in a dog was determined by a simple method of attaching a specially-devised, end-window counter to the clamped upper and lower incisors of the animal, and determining the counting rate in the usual fashion. To determine the Sr/sup 90/ content in the whole body, it is necessary to know two coefficients. First, the surface activity of the tooth must be converted to a specific activity (K/sub 1/). Secondly, the specific activity of the teeth must be converted to the specific activity of bone (K/sub 2/). Here K/sub 1/ = N/ A/sub m3/, where N is the external beta activity of the teeth in counts per minute, and K/sub 2/ = A/sub 3//A/sub kappa /, where A/sub is the activity in mu C per gram of tooth, and A/sub kappa / is the activity in mu C per gram of skeleton. The experimental value of K/sub 1/ was found to be 1.1 to 1.3 x 10/sup -5/. The coefficient K/sub 2/ varies as a function of the residence time of the isotope in the body. Its value is 1.35 plus or minus 0.45 for long residence times of Sr/sup 90/ in dogs. Radiochemical studies of Sr/sup 90/more » in the bones and teeth of people who died showed that K/sub 2/ is close to 1 for adults, and approximately 2 for children. The content of Sr/sup 90/ in a human body can be measured at a level of 0.3 to 0.5 mu C with the use of these coefficients. (TTT)« less" @default.
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- W236542007 date "1963-01-01" @default.
- W236542007 modified "2023-09-23" @default.
- W236542007 title "AN EXPRESS METHOD OF DETERMINING RADIOSTRONTIUM IN THE BODY OF MAN OR OF AN ANIMAL DURING ITS LIFETIME" @default.
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