立井混合作业施工段高的稳定性分析

本文利用有限元法,对立井混合作业施工段高进行了稳定性分析,找出了围岩体的应力分布规律,从而确定了不同井深,不同岩层条件下的施工段高的大小。文章最后建议加大现行段高的尺寸,以提高成井速度.     

钝齿棒状杆菌转导噬菌体T-1的理化和生物学特性

虽然对谷氨酸产生菌(Corynebacterium crenatum)噬菌体已有许多较深入的研究,但对于噬菌体在遗传学上的应用的研究却很少。为寻找适合于谷氨酸产生菌的遗传载体,本实验室从分离出的48株噬菌体中,筛选后得到两株具有转导能力的噬菌体。下文报道其中一株的理化、生物学特性,为已发表的谷氨酸产生菌噬菌体进行比较,提供选择转导噬菌体的参考。     

Hypothalamo-hypophyseal-gonadal function in the rat following administration of the novel and selective D-1 agonist CY 208-243

Summary The effects of the novel and selective dopamine D-1 agonist CY 208-243 on the rat hypothalamo-hypophyseal-gonadal (HHG) axis were studied. CY 208-243 did not modify the concentration of luteinizing hormone (LH) in serum from female or male rats, and had no effect upon opiate antagonist-induced stimulation of LH secretion in male rats. CY 208-243 did not inhibit ovulation in cycling female rats. Thus, D-1 receptor activation by systemic drug administration does not alter HHG function in rats.     

东濮凹陷濮城油田沙三—沙四段岩相分析

东濮凹陷濮城油田沙四下是一套紫红色砂泥岩,其沉积特征反映一种比较特殊的滨湖亚相环境,可分为砂坪微相、砂泥混合坪微相和泥坪微相。沙四上—沙三~3有四种岩相:暗色泥岩及页岩相浊积岩相,石膏及盐岩相,黑色硅质岩相。四种岩相的组合反映深湖-半深湖环境。本文着重进行浊积岩相分析,初步探讨了四种岩相组合的形成机制,指出了断裂-岩相-形成油气藏的相互关系。     

Hormone and forskolin-stimulated cyclic AMP accumulation in human lymphocytes: reliability of longitudinal time measurements

Summary Reliability of measurement of lymphocyte cyclic AMP synthesis in intact cells was estimated by taking 3 successive blood samples during a one-month period from 11 healthy volunteers. Isoproterenol and prostaglandin E₁-stimulated cyclic AMP accumulation were used to evaluate the activity of these two receptor activities in human lymphocytes. Forskolin-stimulated cyclic AMP accumulation was used to evaluate the activity of the Ns/catalytic subunit. Only for forskolin was significant reliability observed. For isoproterenol and prostaglandin E₁ significant reliability was observed only for male subjects.Acknowledgment. This work was supported in part by the following organizations: Chief Scientist's Office, Israel Ministry of Health; Herman Goldman Foundation, New York; United Jewish Endowment Fund of Greater Washington-Pollinger Foundation.     

SBS聚合物改性沥青热储存稳定性取样方法和评价指标

针对现行规范中离析试验评价聚合物改性沥青热储存稳定性的缺点,结合工程实际,设计开发了筒法离析试验.通过对不同种类、不同剂量的SBS聚合物改性沥青进行不同时刻的筒法离析试验,并对离析后上、下部沥青进行了软化点试验、动态剪切流变(DSR)试验和凝胶渗透色谱(GPC)试验,首次提出了采用离析率Rz 1作为SBS聚合物改性沥青热储存稳定性的评价指标.结果表明,筒法离析试验是一种更合理、更有效的评价方法.     

GaAs1-xSbx/GaAs量子阱的Type-Ⅱ特性

研究了分子束外延生长的不同舍量的GaAs1-xSbx／GaAs量子阱的光荧光特性和时间分辨光谱特性．分析表明，利用电子空穴分离导致了能带弯曲和能带填充效应，实验结果说明了GaAs1-xSbx／GaAs异质结至少在Sb原子数目百分比为16％～26％时是Type-Ⅱ结构．     

OsICK1 基因植物反义表达载体的构建及遗传转化

OsICK1是水稻细胞周期蛋白依赖性激酶抑制剂基因.我们构建了水稻细胞周期蛋白依赖性激酶抑制剂基因(OsICK1)的植物反义表达载体,在农杆菌的介导下尝试使antisense OsICK1 整合到水稻基因组中并初步得到验证.为进一步研究OsICK1 对水稻细胞周期调控的作用奠定了基础.