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SCHJEIDE, YAMAZAKI, CLEMENTE, RAGAN AND SIMONS 



• O 



Nitrogen values for lipid-extracted brain solids were obtained for rats 

 aged 11-18 days. In nineteen groups, no significant differences could be 

 demonstrated either as a function of age or of x-irradiation. There was an 

 average of 83% protein and amino acid in the lipid-extracted solid material. 

 The potentially most interesting stages with respect to variations in intra- 



