Abstract
Summary
The comparative metabolism of calcium and radium has been studied in a young beagle dog. Ra226 left the blood more rapidly than Ca45; the preferential excretion of radium by both kidney and gut is a factor in explaining the blood data, and also is the principal gross metabolic difference. The retention of both alkaline earths was greater than 90%, consistent with the fact that the skeleton was rapidly growing. Analysis of individual bones revealed no significant difference in the relative deposition of the two isotopes, but the teeth showed a preferential incorporation of calcium.
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