rsa values , i.e. , the ratio of organically bound tritium per hydrogen content of dry tissue over aqueous tritium per hydrogen content of water , were estimated for newborn , juvenile and adult mice , at various time intervals ( 1 , 8 , 15 , 22 and 29 days ) following single administration of tritiated water , tritiated thymidine , uridine or leucine .
C0041119
tritium
C0020275
hydrogen