低剂量~（147）Pm对免疫细胞的刺激增殖效应

探讨了低剂量~（１４７）Ｐｍ内照射时，引起中枢和外周免疫细胞的刺激增殖效应。（１４７）~Ｐｍ的体内滞留过程，用最小二乘法拟合滞留方程为：Ｒ（ｔ）＝０．１９９ｅ０（－０．１４５２ｔ）＋０．８１２ｅ（－０．０００８ｔ）。可见包括快、慢两个不同半滞留期，快组分Ｔ１＝４．７７天，慢组分Ｔ２＝８６６．３天。当机体摄人（１４７）~ｐｍ０．１８５～０．７４ｋＢｑ／ｇ，即吸收剂量为０．２２３－０．８８２ｃＧｙ时，可使中枢免疫器官骨髓和胸腺细胞的３Ｈ－ＴｄＲ掺入率显著增升；而摄入（１４７）~ｐｍ０．１８５ｋＢｑ／ｇ，即吸收剂量为０．２２３ｃＧｙ时，可刺激外周免疫器官脾Ｔ、Ｂ淋巴细胞转化过程，增强增殖。     

郯庐断裂系统与中国东部幔源岩浆成因CO_2关系的初探

中国已发现的幔源岩浆成因CO2气藏主要分布在与郯庐断裂发育密切相关的东部伸展盆地，两者关系具体表现如下：1．中国东部幔源岩浆成因CO2气藏的空间展布与郯庐断裂保持一致；2．郯庐断裂切割深度达到上地幔；3．沿郯庐断裂岩浆活动强烈，且具幔源特点；4．中国东部伸展盆地自中、新生代以来的演化受郯庐断裂带活动影响。本文主要以郯庐断裂带为主线，结合幔源岩浆成因CO2气藏典型实例，从郯庐断裂构造环境、空间格局和演化过程对幔源岩浆成因CO2的控制作用进行初步归纳和分析。     

Triploid fetus: An important consideration in the evaluation of very high maternal serum alpha-fetoprotein

Two patients referred for evaluation of very high maternal serum alpha-fetoprotein (10–20 multiples of the median) were carrying triploid fetuses with placentas showing features of partial hydatidiform mole. The diagnosis of fetal triploidy should be considered when there is a very high maternal serum alpha-fetoprotein and no ultrasound evidence of open neural tube defect, ventral wall defect, or any other explanation. Therefore, chromosomal analysis of amniotic fluid cells in such cases is essential.