Abstract
The strontium-calcium discrimination factors in the fowl and goat were studied, andreported in the previous paper. This article shows the effects of stable calciurn or strontiumadministration on the excretion and absorption of strontium-90 and calcium-45, and strontium-calcium discrimination following oral doses of the tracers, in the fowl and goat.When calcium lactate or strontium chloride was administered orally soon after the oraldose of strontium-90 and calcium-45 in the fowl, the increase of the strontium-90 andcalcium-45 excretion, and the decrease of bone retention of tracers, were observed. Thebone retention factors of strontium averaged 0.12 in the fowl administered calcium, and0.135 in those administered strontium. In both groups, the rate of the strontium excretionwas greater than that of the calcium excretion, but it seemed that the effect of the calciumadministration was rather greater tharz that of the strontium administration.When calcium lactate or strontium chloride was orally administered, soon after the oraldose of strontiurn-90 and calcium-45, in the case of the goat, the excretions of strontium-90and calciurrn-45, especially the urinary excretions, were increased, and the bone retentions ofthem were decreased. The increase of the rate of strontium in relation to calciurrn excretionwas greater in the goat administered strontium than in one administered calcium. Further-more, it was suggested that the retention of strontium-90 could to be dirninished by thecontinuous administration of a small quantity of stable strontium.
