Fission products and the dairy cow IV. The metabolism of 131I following single and multiple doses

Abstract

1. The change in concentration of 131I with time in plasma, urine, milk and the thyroid gland has been followed in four cows after administration of either a single oral dose or of 131I from a decaying source every 6 hr. for 14 days.2. The observed changes in concentration following multiple doses have been compared with those predicted from the single-dose experiments.3. Small discrepancies were observed between the observed and predicted course of events in urine, milk and the thyroid gland: their significance is considered to be doubtful.