14 



In young barley plants, phosphorus-32 radiation damage was confined to cells 

 in zones of active division (10). The lowest specific activity level at which damage 

 was produced corresponded to 3. 2 mc of phosphorus-32 per g of phosphorus, or 

 about 170jLic of phosphorus-32 per g of dry plant tissue. 



A more complete treatment of this subject is found in the Proceedings of the 

 First National Symposium on Radioecology (115). 



