Methods: The radioactive intensities of 3H leucine in brain protein and 3H uridine in RNA of brain tissue of young mice were observed by the methods of incorporation in vivo and group control observation.

• 方法 :采用体内掺入法 ,分组对照观察幼龄小鼠脑蛋白中3H 亮氨酸和脑RNA中3H 尿嘧啶核苷的放射性强度。