aia . hoe things that is mest charasteric of this camage to the thyroid gland. Accompanying this usually you will have a ccereass in the follicle size, but the one that is most characteristically tissve in th As I say, there were a lot of other things which Simply do not have tine to cover, I do not have with me the data which covors these, either, so this is morcly an indication of the Linc of things wiaich aro identified, Io misht just nontdon that in the studies it apnoars 0 the mill, so you have then an climination of the iodin Db @ 4 @ that apvroninately 20 vercent of the caily cose is put out in hich can ke throuch any of tke socroting tissues. This study hove, of course, is anpplicabie to environment like Ianford which has a chrcnic elimination of iodine, This’ would bo true only if you gave this five mierccuries per day, day aftcr day, to maintain a radiation level in the thyroid, ‘ Ii this wore givon a singlo cose over 100 doses, it would be absolutely ineffoetual, , , The next slide shows ths kind of uptake which follows — 2 single feeding. In this case, the hay was coutaminated at the etart of the exnerirncont. ££ the sheop fed cn this single batch of kay, wo sce the incranse of thyroid activity, increase of ~ lodine activity in the thyroid gland, and this reaches a maxim riget at about 12 days. This is very ropreduceable,

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