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We have developed a simple and easy-handling procedure for copper-catalyzed cyanation of aryl halides using K4[Fe_6] as the cyanide source. The present procedure has ligand- and base-free advantages, and was accomplished under the conditions of exposure to the air without degassing of the solvent.4. We carried out the selective control of preparation for phenyl ether and phenol from iodobenzene with 10 mol% of Cu_2·H_2O as the catalyst under the condition of exposure to air.

这个程序有无配体无碱的好处，并能够在暴露于空气的条件下进行，溶剂也不用脱气。4、空气气氛下，用10 mol%的Cu_2·H_2O催化碘苯偶联，实现了制备二苯醚和苯酚的选择性控制：即在有(来源：Aa955BC55论文网www.abclunwen.com)机溶剂NMP中实现了碘苯直接制备二苯醚的Ullmann反应，在H2O中实现了碘苯直接制备苯酚。

Chronic aluminum exposure during pregnant and lactational stage can degradethe expresion of PKCγlevel and mRNA of pups. provid the theory for frommolecular level elucidate Chronic aluminum exposure can damage the function oflearning and memory

大鼠孕哺期不同剂量慢性铝暴露降低子代鼠海马PKC蛋白表达和mRNA表达水平，从分子水平阐明慢性铝暴露损害学习记忆功能的作用机制提供出理论依据。

Results: A total of 37 cases of occupational exposure, by job category, the top three, respectively, are nurses, medical waste treatment, physicians, according to the risk factors of points, the top three, respectively, are a sharp weapon injury, mucocutaneous exposure, hand contamination.

结果：共发生37例职业暴露，按工作类别分，前3位分别是护士、医疗废物处理人员、医生；按危险因素分，前3位分别是利器损伤、皮肤黏膜暴露、手污染。

Moreover, in comparison of birth lengths in eight subgroups defin ed by organic solvent status (nonexposure/exposure) and maternal genotype for MS P1 and GSTM1, in the presence of organic solvents ' exposure , the birt h length was a clear gradient of adverse effects .

3我们将芳香烃溶剂，母亲基因MSP1（野生型、杂合子/突变型）与基因GSTM1分为8组，在芳香烃溶剂暴露组，可见母亲基因型致出生身长呈斜线降低，然而在芳香烃溶剂非暴露组，其母亲基因型对出生身长的影响无明显改变。

Results Risk for lung cancer caused by exposure to nitrosoamine increased significantly after adjustment of nonoccupational risk factors (RR=271,with 95% CI of 132 to 557),with a significant doseresponse relationship between exposure to nitrosoamine and lung cancer.

结论（1）本文数据提示病例－队列分析因标准误较小、抽样更简便而优于巢式病例－对照研究方法；（2）亚硝胺暴露与肺癌之间有较确定的关系，但受到吸烟和经济状况等因素作用的修饰，需进一步研究

Cumulative noise exposure was calculated according to noise intensity and working age. Testof Audio acuity was carried out for 931 noise exposure workers,who are with non - otopathy.

用HS6288 系列噪声分析仪监测作业场所噪声强度，并进行频谱分析，计算累积噪声暴露量；对某纺织厂接触噪声作业的无耳疾患的931人进行听力检测；用EpiData 建立数据库，SAS 软件8.0 统计包进行统计分析。

Methods : The noise intensity and spect ral analysis were monitored with HS6288 noise inspector.Cumulative noise exposure was calculated according to noise intensity and working age. Testof Audio acuity was carried out for 931 noise exposure workers,who are with non - otopathy.

用HS6288 系列噪声分析仪监测作业场所噪声强度，并进行频谱分析，计算累积噪声暴露量；对某纺织厂接触噪声作业的无耳疾患的931人进行听力检测；用EpiData 建立数据库，SAS 软件8.0 统计包进行统计分析。

Gz exposure might produce ischema-reperfusion effect on rat brain and the function of repeated +Gz exposure was similar to that of ischemia prestimulation.

Gz暴露可对大鼠脑产生类似缺血再灌注的作用（Glaister，1988），反复+Gz暴露可对大鼠脑产生类似缺血预刺激的作用。

This experiment aimed to systematically investigate and analyze the ethanol activated rates of mouse oocytes, affected factors of oocytes activation, types and development of parthenotes, and the organization and roles of the cytoskeleton during pronuclear formation and migration and early embryo cleavage by ethanol activation of oocytes, embryo culture in vitro and immunofluorescence cyto-chemistry. The results:(1) The ethanol activation of mouse oocytes showed that the activated and developmental rates of oocytes increased significantly with the increase of ethanol concentration and extension of exposure time, but over concentration and exposure time would result in increased fragment rates significantly. 7% ethanol treated oocytes for 7min was the optimum activated condition.

本实验主要利用卵母细胞的乙醇激活、胚胎体外培养和免疫荧光细胞化学方法对小鼠卵母细胞乙醇激活效率、影响因素、孤雌胚类型、发育、原核形成、迁移及早期胚胎卵裂过程中细胞骨架的组装、作用等进行了系统的研究和分析，结果显示：(1)小鼠卵母细胞的乙醇激活结果表明，随着乙醇浓度的升高和作用时间的延长，卵母细胞激活率和发育率都显著提高，但乙醇浓度过高和作用时间过长会导致卵母细胞碎裂率的显著增加，7%乙醇作用卵母细胞7min 为最佳激活条件。

Exposure of naive CD4〓T lymphocytes to superantigen induces a strong proliferative response. Prolonged exposure or subsequent restimulation of the responding CD4〓T cell population with superantigen leads to the apoptotic events of activation-induced cell death.

幼稚的〓细胞暴露于超抗原可诱导强烈的增殖反应，继续延长暴露或再次刺激应答〓细胞可导致活化诱导的细胞死亡。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。