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Six lactating dairy cows were administered 100 ~c. I ~ intrajugularly. Samples of milk were analyzed daily for five days for the content of I ~ present. During the first 24 hr. from 4.9 to 7.2% of the injected dose of I ~ appeared in the milk, with a mean of 5.8%. During the five-day period, the total mean percentage of the injected dose increased to 8.2, with a range of 6.9 to 9.2%.
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Premachandra et al. (1961) studied this question.
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