Determination of Endogenous Fecal Calcium in Cattle by a Simple Isotope Dilution Method
- 1 May 1953
- journal article
- research article
- Published by Elsevier in Journal of Nutrition
- Vol. 50 (1) , 23-33
- https://doi.org/10.1093/jn/50.1.23
Abstract
Endogenous fecal calcium was estimated directly in normal cattle by a method which consisted of 10 daily intravenous injections of radiocalcium, comparison of the specific activities of blood and feces taken on the 4th to 8th day post-injection, and routine determination of calcium balance. The daily endogenous fecal values for three 8-year-old dairy cows averaged 7 gm and for two yearling Hereford steers about 4 gm. The endogenous fecal calcium was not significantly changed when the dietary calcium was varied from normal to a high level. In two animals on a low calcium diet a decrease in endogenous fecal calcium was indicated.Keywords
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