Abstract
Summary
Diets containing various levels of stable strontium and calcium and containing low and constant levels of Ca45 and Sr89 were fed to young rats during a 3 week period. The amounts of the 2 isotopes in the bones were measured. Addition of small amounts of stable Sr, sufficient to reduce the specific activity of the dietary Sr to one-fourth, did not decrease the deposition of radio-Sr and may have caused a slight increase in the deposition of both Ca45 and Sr89. Larger amounts of stable Sr were no more effective than calcium in reducing the amounts of the isotopes deposited in the bones.
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