METABOLISM OF I$sup 131$ BY DAIRY COWS DURING LONG TERM DAILY ADMINISTRATION OF THE RADIOISOTOPE
The results of fifteen trials on nine cows given I/sup 131/ twice daily for about 14 days are presented. The cows showed a thyroid I/sup 131/ level equivalent to 79% of a daily dose, put about 1% of the daily dose of I/sup 131/ into each liter of milk, and showed a milk/plasma I/sup 131/ ratio of 2: 3. Approximately 5% of the I/sup 131/ of the milk was found to be protein bound at the end of 2 weeks of receiving I/sup 131/. The total I/sup 131/ found in milk, thyroid, and whole body was followed in two cows from the start of I/sup 131/ dosing. When the decay of I/sup 131/ was accounted for, the per cent of milk I/ sup 131/ was found to plateau at about 8 days while that of the body and thyroid did not plateau during the experiment. The amount of I/sup 131/ in milk wag maximum at about 3 days and reached a peak in the thyroid and body at about 10 to 8 days, respectively. Data are presented to show that the level of stable iodine in the diet of the cow may affect the movement of I/sup 131/ into milk. (auth)
- Research Organization:
- Cornell Univ., Itaca, N.Y.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-18-011592
- OSTI ID:
- 4095694
- Journal Information:
- Health Phys, Journal Name: Health Phys Vol. Vol: 10
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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