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SD大鼠第16天的胎鼠(F16)和生后1 天(N_1)和5天(N5)的乳鼠,取其胸腺称重,测比重计算色埋前体积。组织切成小块后用戊二醛和四氧化锇先后固定,树脂包埋,作1μm切片,甲苯胺蓝染色,油镜观
Sprague-Dawley rats on day 16 (F16) and on day 1 (N_1) and day 5 (N5) after birth were weighed and their thymus weights were measured. The tissue was cut into small pieces and then fixed with glutaraldehyde and osmium tetroxide. The resin was embedded and cut into 1 μm sections and stained with toluidine blue.