• 代物添加剂可以大大提高辐射变色薄膜响应灵敏度

    The sensitivity of the response is remarkably improved when halides are added into the radiochromic system.

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  • 有机卤代物光反应作为构建-碳碳-杂原子键的一种重要途径已经得到广泛和深入研究

    As an important approach of carbon-carbon bond formation and carbon-heteroatom bond formation, photochemistry of organic halides has been studied extensively.

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  • 研究了甾醇酯类甾醇卤代物电子轰击电离(EI)、解吸电离(FD)、化学电离(CI)的谱。

    Mass spectra (MS) of cholesterol esters and halides were obtained by means of Electron Impact (EI), Field Desorption (FD) and Chemical Ionization (CI).

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  • 结果表明,氯化汞活化金属类化合丙基苄基卤代物的反应有效高产率地生成醇。

    Samarium metal (activated by HgCl2) is an effective reagent for allylation or benzylation of ketones. The corresponding tertiary alcs. are obtained in satisfactory yields.

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  • 加成( 1 )与素反应后,与锡原子相连的苯基,得到一卤代混合卤代物28) 。

    The phenyl groups in compound 1 were substituted by ICl, Br 2 or I 2 to yield mono- and dihalide derivatives(28).

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  • 目前合成方法尚有很多不足之处,我们在总结前人经验的基础硒格氏试剂反应直接卤代烯烃反应制得一系列硒醚。

    Based on the former research works, we used magnesium selenolate as reactant to react with RX or styrene to synthesize a series of selenide. Followings are the main research results:1.

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  • 这个反应生成一些卤代化合

    The reaction gives some of the dihalogeno compound .

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  • 氯醇生产环氧丙烷所合杂质乙醛丙醛外还有烃类环氧化卤代丙酮醇类

    Chlorohydrin production of propylene oxide with the impurities except for acetaldehyde, propionaldehyde and hydrocarbon, epoxides, halogenated alkanes, acetone, alcohols, such as.

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  • 碱金属碱土金属的多硫化缩聚而成。

    By two alkyl halide with alkali metal or alkaline earth metal polysulfides from condensation.

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  • 为原料合成乙烯类化合

    Preparing alkenyl halide from aldehyde and ketone.

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  • 这个反应生成一些卤代化合

    The reaction gives some of the dihalogeno compound.

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  • 一类重要有机化合化学工业农业材料环保有机合成中有着广泛的应用。

    Halohydrocarbon is one of the most important organic compounds and widely used in chemical industry, agriculture, material, environmental protection and modern organic synthesis.

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  • 水雾具有良好液滴分散性、高热蒸发等特性,因此作为烷烃灭火剂代物,细水雾灭火技术己得到了广泛的研究应用。

    Due to the fine dispersity, high heat capacity, and ease of evaporation, water mists have got widely used and concerned about as the substitute of the haloalkane extinguishing agent.

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  • 本文某市几个自来水厂不同季节原水、出厂水中腐殖酸、挥发性有机含量进行测定

    The measurement of humic acid, trihalom- ethanes and nonvolatile organic compounds in raw water, chlorinating water and tip water of several waterworks were carry out in two dis- tinct seasons.

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  • 使用最多卤代化合(次氯酸钠形式)

    The most widely used halogenated compounds are chlorine (in the form of sodium hypochlorite) and iodine.

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  • 新的17-的19-去甲甾醇类,制备方法中间体,它们作为以及含有它们的组合

    Novel 17-halogenated 19-Nor steroids, method and intermediates for preparing same, use as medicines and pharmaceutical compositions containing same.

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  • 所有检出有机中,有机氯农药烃类检出率最高分别达到60%、57.8%。

    Among all the organisms, the organochlorine pesticide category and halohydrocarbon category get the highest detection rate as 60% and 57.8% respectively.

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  • 卤代丙烯化合含有作为活性成分杀虫剂以及生产中间体

    Dihalopropene compounds, insecticides containing them as active ingredients, and intermediates for their production.

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  • 介绍了芳香族化合几种合成方法,叙述了交换中的几个关键技术

    Several synthetic methods to synthesize fluorine - containing aroma tic compounds are introduced, and some key techniques in halo exchange and fluor o substitution are put forward.

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  • 经过筛选确定苯系多环芳烃、有机氯农药、多氯联苯挥发性卤代烃为主要污染

    The main pollutants are benzene serial materials, polycyclic aromatic hydrocarbon, organochlorine insecticide, PCB and volatile halogenated hydrocarbon.

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  • 但是,1974年科学家发现化合造成臭氧空洞形成重要原因

    But in 1974 scientists found that the halogen-alkyl compound is the main factor of those can lead to the Ozone cavity.

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  • DSC技术研究了丙烯腈共聚行为查明卤代羧酸共聚单体PAN热稳定化过程影响

    The thermal stability of AN copolymers was studied by DSC technique in order to get information on the influence of comonomers containing halogenated carboxylic acid on the stabilization of PAN.

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  • 转移催化剂种类原理反应条件以及它卤代芳香族化合化反应中的应用等方面对相转移催化剂的作用进行概括总结。

    The application of phase transfer catalysis in fluorination of halo-aromatic compounds, mechanism, variety and reaction condition of fluorination are reviewed in this article.

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  • 模型用于解释卤代芳烃化合还原脱机理

    The model can be used to explain the dehalogenation mechanism.

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  • 本文综述卤代硝基还原制备卤代三种方法几种还原方法的优缺点进行了对比和讨论,得出水合肼还原具有很好的应用前景。

    This article reviews three kinds of methods for manufacture halogenated aromatic amine, and the strong and weak points of the three reduction methods are pointed out.

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  • 二恶烷经常会河水特别是地下水检测到,这主要是由于挥发性卤代碳氢化合造成的污染

    Dioxane has been frequently detected in river water, especially in ground water polluted by volatile halogenated hydrocarbons.

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  • 所述组合含有溶剂化合或者两种多种组合通过共氨解作用得到的聚 硅氮烷化合

    The composition contains a solvent and a polysilazane compound obtained by co-ammonolysis of one or a combination of two or more halosilane compounds.

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  • 根据脂肪、多联苯卤代稠环芳烃等80种非极性有机化合鱼体中生富集因子BCF实测数据建立了有机在鱼体中生富集因子的片段常数估算模型

    Relationship between bioconcentration factor and fragment constants was investigated. A prediction model was developed on the basis of the observed BCF values of 80 non-polar organic compounds.

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  • 根据脂肪、多联苯卤代稠环芳烃等80种非极性有机化合鱼体中生富集因子BCF实测数据建立了有机在鱼体中生富集因子的片段常数估算模型

    Relationship between bioconcentration factor and fragment constants was investigated. A prediction model was developed on the basis of the observed BCF values of 80 non-polar organic compounds.

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