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In the development of human foetus. liver is an important haemopoietic organ. Wehave determined the liver weight and total hepatic nucleated cells from 24 foetuses on the onehand, and CFU-C yield, total number of CFU-C and T-lymphocytes in liver from 22 foetuses ofdifferent ages on the other. From the kinetic observations through the early developmental period of the foetuses. themaximum yield of CFU-C or the total numer of CFU-C in the liver occurs at 4--5 months ofgestation; during the first 5 months of gestation the percentage of T-lymphocytes in the liveris about 1--2%. 相似文献
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采用直流电弧等离子体技术成功制备了NiO纳米颗粒,并利用X射线衍射(XRD)、透射电子显微镜(TEM)和相应选区电子衍射(SAED)、傅里叶变换红外光谱(FTIR)、BET氮吸附等测试方法对样品的成分、形貌、晶体结构、比表面积、粒度分布、红外吸收性能进行表征分析.实验结果表明:直流电弧等离子体制备的NiO纳米颗粒为fcc结构的晶态,形貌呈规则的球形,粒度均匀,分散性良好,粒径范围在15~45 nm,平均粒径为25 nm,比表面积为33 m2/g.与普通块体NiO相比,红外吸收峰发生了红移. 相似文献
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