Abstract
AbstractThe absorption and excretion of 47Ca and 85Sr, measured by an arm counting technique is compared, and the effect of increasing carrier loads of stable calcium demonstrated. The net absorption of 47Ca was found to be greater than that of 85Sr, at all levels of calcium intake although the net absorption of both isotopes fell as the calcium carrier loud was increased.The excretion of 85Sr, measured by arm counting, was 3.36 times greater than that of 47Ca. This compares favourably with figures of 3.34 (Nordin, Smith and Nisbet 1964) and 3.5 (Barnes, Bishop, Harrison and Sutton, 1961) derived from plasma, urinary and faecal measurements made over a period of seven days in a hospital metabolic unit.
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