816 



ADVENTURES IN RADIOISOTOPE RESEARCH 



Infest. 

 Mucosa 



r 



Muscles 



Brain 



1 



Liver 



■ 



I 



^ 



¥ 



-y 



M 



^ 



Fig. 8. Uptake of ^^C by 1 mgm of tissue proteins of irradiated and of 

 control suckling rats 3 hr after intraperitoneal injection of 



NaCHg "COO. 



Liver 



Infest. 

 Mucosa 



Lungs 



Muscles 



2^ 



Brain 

 V. 



Fig. 9. Uptake of ^*C by 1 mgm of total fat extracted from organs of 

 irradiated and of control mice 90 min after intraperitoneal injec- 

 tion of NaCHg "COO. 



we are dealing with rapidly growing, however, in the other case with 

 fully grown animals. 



The difference in the pattern of "C uptake by the proteins of the 

 tissuefractionsof fully grown mice and suckling rats is seen in Figs. 2—7 

 and 8. When plotting the figures the i^C content of 1 mgm of protein secured 



