Intestinal absorption of $sup 45$Ca and $sup 89$Sr as affected by Ca, Sr, and Mg
The small intestines of White Leghorn cockerels (200 g.) were perfused - with 0, 1, 5 or 25 mM Ca, Sr or Mg at a rate of 1 ml/min for 100 min. During 25 to 75 min of perfusion, /sup 45/Ca and /sup 89/Sr were added. The birds were sacrificed and the radionuclides in the carcasses.determined. As little as 1 mM Ca, Sr, or Mg reduced /sup 45/Ca and /sup 89/Sr absorption. These radionuclides also decreased when the Ca content of the perfusate increased from 1 to 5 mM. No significant differences were observed in their absorption when Sr or Mg were raised from 1 to 25 mM. Ca reduced /sup 45/Ca and /sup 89/Sr absorption at about the same rate, while Sr and Mg reduced /sup 89/Sr more than /sup 45/Ca. (auth)
- Research Organization:
- Univ. of Tennessee, Oak Ridge
- NSA Number:
- NSA-29-018670
- OSTI ID:
- 4319101
- Journal Information:
- Poultry Sci., v. 52, no. 3, pp. 1208-1209, Journal Name: Poultry Sci., v. 52, no. 3, pp. 1208-1209; ISSN POSCA
- Country of Publication:
- United States
- Language:
- English
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*CALCIUM-- RESPONSE MODIFYING FACTORS
*MAGNESIUM-- RESPONSE MODIFYING FACTORS
*SMALL INTESTINE-- RADIONUCLIDE KINETICS
*STRONTIUM 89-- INTESTINAL ABSORPTION
*STRONTIUM-- RESPONSE MODIFYING FACTORS
CHICKENS
N48720* --Life Sciences--Nuclide Kinetics & Toxicology-- Animals