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hydrogen     
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    Study on Process of Biological Hydrogen Production from Indirect Photo-hydrolysis by Unicellular Green Algae
    绿藻间接光解水制过程的研究
短句来源
    Study on the CO_2 Sorbents in the Single-Step Hydrogen Production from Carbonaceous Energy
    含碳能源直接制中CO_2吸收剂的研究
短句来源
    A Novel Process of Catalytic Gasification of Biomass for Hydrogen Production with Solid Heat Carrier
    固体热载体法生物质催化气化制新工艺研究
短句来源
    Study on the System of Photosynthetic Hydrogen Production by Solar Energy and Its Spectrum Co-Operate Character
    太阳能光合生物制系统及其光谱耦合特性研究
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    Studies on Selective CO Oxidation from Methanol Reforming Hydrogen Source
    甲醇重整源中选择性氧化脱除CO的研究
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  氢气
    Studies on Novel Four-Bed Pressure Swing Adsorption Process for Hydrogen Purification
    新型四塔变压吸附提纯氢气过程研究
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    SOLUBILITIES OF HYDROGEN IN ACETONEWATER MIXED SOLVENTS
    氢气在混合溶剂丙酮-水中的溶解度
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    REFORMING HYDROGEN UPGRADING BY MEMBRANE SEPARATION
    用膜分离技术提浓重整氢气
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    Removal of Trace CO from Hydrogen by Adsorption on Active Carbon Supported Copper
    载铜活性炭吸附分离氢气中的微量CO
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    Study of the Benefit of the Use of the Waste Hydrogen in the Chlorine Alkali Factory in the producetion of Synthetic Ammonia
    初探氯碱厂富余氢气用于合成氨生产的效益
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  氢的
    Catalytic Oxidation and Reforming of Methanol to Produce Hydrogen
    甲醇催化氧化重整反应制氢的研究
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    Hydrogen Generation from Ammonia Decomposition and Separation by Palladium Membrane
    氨分解制氢与钯膜分离氢的研究
短句来源
    Rapid Microdetermination of Carbon and Hydrogen in Organic Compounds-Ag_2 WO_4-MgO/Co_3 O_4/Ag_2WO_4-MgO as the Combustion Tube Packing
    有机化合物中碳氢的快速微量测定——以Ag_2WO_4-MgO/Co_3O-4/Ag_2WO_4-MgO为管填充
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    Study on Absorbing Hydrogen on the Surface of Melted Aluminium in Simulation
    铝液表面吸氢的模拟研究
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    On Pressure Dependence of Vapor-Liquid Equilibrium Ratio of Hydrogen in High-Pressure Systems
    高压系统中氢的汽液平衡比随压力的变化关系
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  制氢
    Study on Process of Biological Hydrogen Production from Indirect Photo-hydrolysis by Unicellular Green Algae
    绿藻间接光解水制氢过程的研究
短句来源
    Study on the CO_2 Sorbents in the Single-Step Hydrogen Production from Carbonaceous Energy
    含碳能源直接制氢中CO_2吸收剂的研究
短句来源
    A Novel Process of Catalytic Gasification of Biomass for Hydrogen Production with Solid Heat Carrier
    固体热载体法生物质催化气化制氢新工艺研究
短句来源
    Study on the System of Photosynthetic Hydrogen Production by Solar Energy and Its Spectrum Co-Operate Character
    太阳能光合生物制氢系统及其光谱耦合特性研究
短句来源
    Hydrogen Generation from Ammonia Decomposition and Separation by Palladium Membrane
    氨分解制氢与钯膜分离氢的研究
短句来源
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  hydrogen
In the CoMSIA model, steric, electrostatic, hydrophobic and hydrogen bond donating factors were correlated to the activity and later the favorable and unfavorable regions of interaction were obtained.
      
tripos standard, hydrogen bonding, parabolic indicator in the case of CoMFA and steric, electrostatic, donor, acceptor, hydrophobic, donor and acceptor, steric and electrostatic in the case of CoMSIA.
      
Flavonoid antioxidants act as scavengers of free radicals by rapid donation of a hydrogen atom.
      
In addition, electrostatic, hydrogen-bonding, and dipole-dipole interactions are responsible for the above separations, which improve the selectivity of DNB for solutes.
      
Both metalation reaction with n-butyllithium and hydrochlorination reaction with dry hydrogen chloride selectively and quantitatively occurred at the pendant reactive sites, generating polymeric benzyllithium and 1-chloroethylbenzene species.
      
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Some types of glass made thermal conductivity cells for gas analysis were prepared by author, which were constructed with tungsten wire 0.013m. m. in diameter, as a hot wire. Some of their properties had been tested with the gaseous mixtures of hydrogen-nitrogen and of air-carbon dioxide. The prepared thermal conductivity cells may be used with a higher sensitivity, and insensitive to the variation in the rate of gasflow; and with a rapid response to the variation in the composition of gaseous sample during...

Some types of glass made thermal conductivity cells for gas analysis were prepared by author, which were constructed with tungsten wire 0.013m. m. in diameter, as a hot wire. Some of their properties had been tested with the gaseous mixtures of hydrogen-nitrogen and of air-carbon dioxide. The prepared thermal conductivity cells may be used with a higher sensitivity, and insensitive to the variation in the rate of gasflow; and with a rapid response to the variation in the composition of gaseous sample during the continuous analysis. The apparatus can be used suitably as a detector in gas chromatography.

作者用直徑爲0.013mm鎢絲爲熱絲、試制了幾種玻璃制氧體分析用導熱池,並用■—■混合物和空氣—二氧化碳混合物試驗其性能。所製得的導熱池具有較高的靈敏度,對氣體流速改變不靈敏。在連續分析中,對氣體組成改變的反應較快,可適於在氣相色層中用作测定器。

Considering the experimental methods used and results obtained by previous investigators on the preparation of silicon carbide by gaseous cracking, we have performed our experiments in a similar carbon plate resistance furnace in an atmosphere of hydrogen, argon or nitrogen at temperatures from 1400 to 2200℃. The vapor reacting agents used are either SiCl_4,CH_3SiCl-3, (CH_3)_3SiCl or the mixture of toluene and SiCl_4 or (CH_3)_3SiCl。Having examined carefully under polarising microscope, we revealed with...

Considering the experimental methods used and results obtained by previous investigators on the preparation of silicon carbide by gaseous cracking, we have performed our experiments in a similar carbon plate resistance furnace in an atmosphere of hydrogen, argon or nitrogen at temperatures from 1400 to 2200℃. The vapor reacting agents used are either SiCl_4,CH_3SiCl-3, (CH_3)_3SiCl or the mixture of toluene and SiCl_4 or (CH_3)_3SiCl。Having examined carefully under polarising microscope, we revealed with no exception that all of the crystal grains of silicon carbide grown over the above-mentioned temperature range contain skeletons of alpha-silicon carbide platelets, with beta-silicon carbide forming a matrix. Intergrowth of the C planes of alpha-silicon carbide with beta-silicon carbide was observed. The twinning angles of the C planes in alpha-silicon carbide crystal were determined to be 37.3°and 70.2°By calculating the temperature dependence of the free energy change of the possible chemical reactions with SiCl_4 in silicon carbide formation, it has been shown that these reactions can be grouped into three catagories: (1) the decomposition of SiCl_4, (2) the decomposition of hydrocarbons or the syntheses of simple hydrocarbons, and (3) various possible reactions leading to silicon carbide formation. The reactions with methyl chlorosilanes as reacting agents have also been discussed.As a consequence of this investigation, the problem of controlling the crystalline modification during the synthesis of silicon carbide monocrystals by the gaseous cracking method is emphasized, and it is believed that the better solution of this problem would be of no less importance than to increase its crystal size or purity.

本文考虑了前人的研究条件和结果之后在类似的碳片炉内进行了裂化法合成碳化硅的实验,反应试剂为SiCl_4、CH_3SiCl_3、(CH_3)_3SiCl或SiCl_4及(CH_3)_3SiCl与甲苯的混合蒸气,气氛为H_2、Ar或N_2,温度为1400~2200℃。岩相法观察表明,在实验温度范围内制备的碳化硅晶粒内都包含α-SiC晶体的片状骨架,它们往往沿C画与β-SiC相间互生:α-SiC晶架的C面孪晶角为37.3°和70.2°;β-SiC则形成基体物质。 化学反应的自由能变化与温度的依赖关系的计算表明,裂化法的化学作用可以概括为以下三类:(1)SiCl_4的分解反应;(2)碳氢化合物的分解或简单碳氢化合物的介成反应;(3)各种可能合成碳化硅的反应。此外,也讨论了氯化硅烷反应剂系统的裂化反应。 根据实验结果,提出了裂化法生长β-SiC单晶的晶型控制问题,并认为解决这;一问题的重要性应不亚于晶体的大小与纯度。

Synopsis: Some problems on zone refining of silicon without crucible by wet hydrogen treatment are discussed. It contains: the correlation between the ettective dew point of wet hydrogen and flow rate of hydrogen, mlethods of water vapor pressure controllng in the wet hydrogen, chosing of preferable water vapor pressure and preferable efficiencyof refining by wet hydrogen etc.

本文讨论了在湿氢条件下,进行硅的无坩堝区域提纯时,所遇到的几个问题。主要包括:氢气实际露点和氢气流量的关系;控制湿氢中水汽量的方法;最佳水汽量的选择和最佳湿氢提纯效率等问题。

 
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