Retention of Co 60 Labeled Vitamin B12 in Chickens.

Abstract
The results indicate that over 30% of the injected Co 60 activity is retained for as long as 12 weeks in chicks hatched from eggs injected with the radio-vitamin. The total B12 content of the chick as measured microbiologically roughly parallels Co 60 activity until 6 weeks of age, after which there is a decided increase in the total B12 content of the chicks.

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