延长油田含硫采出水回注水质处理研究

延长油田七里村区块采油污水富含S2-、SO42-、HCO3-、SRB。室内静态腐蚀挂片实验及注水管线腐蚀垢样XRD分析可知,管线腐蚀主要是局部腐蚀,引起腐蚀的主要原因是采出水中高含硫。通过实验筛选出效果较佳的缓蚀剂Xasy-201及杀菌剂FW-BT01、FW-BT02以降低腐蚀速率。采用物理化学法对采出水进行净化处理,优选了污水p H值、除铁剂、无机絮凝剂和有机絮凝剂。结果表明:当调节污水p H值为7.5、铁调剂RF-2质量浓度为25 mg/L,无机絮凝剂PAC质量浓度为30 mg/L、有机絮凝剂PAM(1 200万)质量浓度为1.0 mg/L时,水中悬浮物质量浓度小于10 mg/L,硫含量明显降低,处理后污水的平均腐蚀速率小于0.007 6 mm/a,达到回注水水质标准,且与地层水配伍良好。     

含硫双Schiff碱及其金属配合物的合成与生物活性研究

合成了茚三酮-1,3-双缩肼基二硫代甲酸苄酯(HL1),茚三酮-1,3-双缩氨基硫脲(HL2)2种含硫双Schiff碱及它们的铜、钴等金属配合物,通过元素分析、红外光谱、紫外-可见光谱、差热和摩尔电导的测试等对其进行了表征.并测试了双Schiff碱配体对大肠杆菌、枯草芽孢杆菌的抑菌活性.     

Equilibrium: the intracellular distribution of steroid receptors

Data are presented which suggest that there are unbound receptors for oestrogen in nuclei of the smooth muscle cells of the myometrium. A new model for the distribution of unbound receptors is proposed in which unbound receptor is in equilibrium, partitioned between nucleus and cytoplasm according to the free water content of these intracellular compartments.     

环境水体中类固醇激素的分析方法研究进展

类固醇激素是一类新型有机污染物,可通过食物链放大作用在生物和人体内富集,从而干扰生物和人体正常的内分泌机能,因此类固醇激素的研究已逐渐成为国际上环境和健康领域的研究热点。对废水中类固醇激素的前处理方法和仪器分析方法进行了综述,主要包括样品萃取、生物技术、气相色谱-质谱联用技术和液相色谱-质谱联用技术。     

Identification of a new class of steroid hormone receptors

The gonads and adrenal glands produce steroids classified into five major groups which include the oestrogens, progestins, androgens, glucocorticoids and mineralocorticoids. Gonadal steroids control the differentiation and growth of the reproductive system, induce and maintain sexual characteristics and modulate reproductive behaviour. Adrenal steroids also influence differentiation as well as being metabolic regulators. The effects of each steroid depend primarily on its specific receptors, the nature of which could therefore provide a basis for classification of steroid hormone action. The successful cloning, sequencing and expression of the human glucocorticoid (hGR) (ref. 1), oestrogen (hER), progesterone (hPR), and mineralocorticoid (hMR) receptors, complementary DNA, plus homologues from various species, provides the first opportunity to study receptor structure and its influence on gene expression. Sequence comparison and mutational analysis show structural features common to all groups of steroid hormone receptors. The receptors share a highly conserved cysteine-rich region which functions as the DNA-binding domain. This common segment allows the genome to be scanned for related gene products: hMR cDNA for example, was isolated using an hGR hybridization probe. In this study, using the DNA-binding domain of the human oestrogen receptor cDNA as a hybridization probe, we have isolated two cDNA clones encoding polypeptides with structural features suggestive of cryptic steroid hormone receptors which could participate in a new hormone response system.     

Variation in regulation of steroid sulphatase locus in mammals

Inactivation (lyonization) of one of the two copies of X-linked genes occurs in female mammals, thereby reducing the number of active copies to that of the male. It has been suggested that genes subject to lyonization would be expected to be preserved as a linkage group during mammalian evolution. A short region of the human X chromosome containing several genes, including that necessary for the expression of steroid sulphatase (STS), is exceptional in that it apparently escapes X-inactivation. As it is not apparent why the linkage of genes not subject to X-inactivation should be conserved, we have examined the expression of the STS gene in mice (it has been shown recently that this gene is X-linked). Enzyme levels were determined in normal males and females and in the progeny of crosses in which the sex reversing factor, Sxr, was segregating to produce XX males. We report here that in contrast to the situation in humans, the STS gene in mice is subject to the normal pattern of X-inactivation.