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催化
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  catalysis
    Synthesis of Sucrose Esters by phase Transfer Catalysis(Ⅱ) Synthesis of Sucrose Oleate
    用相转移催化合成蔗糖酯(Ⅱ)蔗糖油酸酯的合成
短句来源
    Synthesis of sucrose Esters by Phase Transfer Catalysis (Ⅰ)Synthesis of Sucrose Stearate
    用相转移催化合成蔗糖酯(Ⅰ)蔗糖硬脂酸酯的合成
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    Treatment of dyestuffs wastewater by electrolysis method of complex catalysis.
    复合催化电解法处理染料工业废水
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    The Methylolation of Alkali Lignin through Heterogeneous Catalysis
    碱木素的多相催化羟甲基化
短句来源
    Dry preparation of cationic starch with high degree substitution by the method of alkaline catalysis
    碱催化干法制备高取代度阳离子淀粉
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  catalyst
    STUDIES ON SYSTHESIS OF FURFURYL CARBOXYLATES BY USING MODIFIED ZSM─5 AS CATALYST
    改性ZSM-5分子筛催化法合成糠醇酯的研究
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    The change of chemical structure of straw alkali lignin in deoxidization reaction with cyclohexene catalyzed by CuO/C catalyst which was prepared by equal volume impregnation was studied by FTIR,UV,1H-NMR and HPLC.
    用等体积浸渍法制备CuO/C催化剂,采用FTIR、UV、1H-NMR光谱和HPLC色谱,分析了以CuO/C为催化剂,以环己烯为还原剂对麦草碱木质素进行催化,研究了碱木质素的化学结构变化。
短句来源
    Treatment of acidic black dye wastewater by multi-phase catalytic oxidation over copper catalyst was studied.
    以酸性黑染料废水为处理对象,对多相催化氧化处理工艺中的铜系催化剂进行研究。
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    Catalyzed and synthesized caramel for sauce process by the xylose mother liquor was studied,and the influence of pretreatment method,quantity of catalyst, reaction temperature and time to the product quality was discussed.
    本文研究了用木糖母液催化合成酱油用焦糖色素的工艺条件,探讨了预处理方法、催化剂用量、反应温度、反应时间等参数对产品质量的影响。
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    Synthesis of Nipagin Ester with Solid Acid Catalyst of HY Type
    固体酸催化剂HY催化合成尼泊金酯
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  “催化”译为未确定词的双语例句
    Study on the Electrochemically Mediated Delignification and Bleaching and Its Mechanism of Triploid of Polulus Tomentosa Kraft Pulp
    三倍体毛白杨硫酸盐浆电化学介体催化脱木素和漂白及机理研究
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    Mechanism of Soybean Protein Aggregation Induced by Lipoxygenase-Catalyzed Linoleic Acid
    脂肪氧合酶催化亚油酸诱导大豆蛋白聚集机理
短句来源
    KINETIC COLORIMETRIC DETERMINATION OF IODINE IN HIGH IODINE EGG
    催化分光光度法测定高碘蛋中的碘含量
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    STUDY OF SELECTIVE HYDROGENATION OF ACETYLENE
    乙炔的选择性催化加氢
短句来源
    The experiment results show that an appropriate doping amount of iron can improve the photocatalytic activities of TiO2 films. It is proved that in the experiment condition,the photocatalytic activity of TiO2 film is the highest in all prepared samples when the mole ratio of Fe3+ to TiO2 is 0.06%.
    结果表明:适量Fe3+的掺杂可明显提高TiO2玻璃薄膜在太阳光下的催化性能,掺Fe3+的摩尔质量百分数为(Fe3+/TiO2)0.06%时的光催化活性最高.
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  catalysis
Also, Lys residue and disulfide bands are necessary to protect the catalysis of the AKP.
      
Dibenzothiophene (DBT) monooxygenase (DszC) catalysis, the first and also the key step in the microbial DBT desulfurization, is the conversion of DBT to DBT sulfone (DBTO2).
      
Isolated Mn2O3 nanotubes and nanofibers were prepared very easily at a large scale with the liquid-phase catalysis method.
      
Synthesis of a new iron(III) porphyrin acrylate-styrene copolymer and its catalysis for hydroxylation of cyclohexane
      
The catalysis of chloridized metalloporphyrins in the oxidation of cyclohexane to adipic acid was systematically investigated.
      
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  catalyst
A new environmentally friendly catalyst, H4SiW12O40-polyaniline (PAn), was prepared, and n-butyraldehyde 1,2-propanediol acetal was synthesized from n-butyraldehyde and 1,2-propanediol in the presence of H4SiW12O40-PAn.
      
The influence factors of the synthesis were discussed, and the best reaction conditions were found: the molar ratio of n-butyraldehyde to 1,2-propanediol is 1:1.5, the amount of catalyst used is 1.2% of feed stock, and the reaction time is 1.0 h.
      
H4SiW12O40-PAn is an excellent catalyst for synthesizing n-butyraldehyde 1,2-propanediol acetal, and the yield can reach more than 95.2%.
      
The partial intermediate products were absorbed on TiO2 surface, which resulted in catalyst deactivation.
      
But when it was irradiated under UV illumination or solar irradiation for some time, the catalyst could be reused without loss of catalytic activity.
      
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In this paper the fibroins of China's bombyx mori are reacted with formalde-

本文将国产家蚕丝素进行甲本醛化、溴化反应,封闭丝素分子中侧基上的活性基团(-CH_2OH、-■-OH、-NH_2等)或降低活性基团的活性,致使丝素的微细结构发生变化.然后研究原丝素、甲醛化丝素和溴化丝素在酸、碱存在下的催化水解性能,从碱水解时间与丝素残剩率关系中,用作图法求三种丝素的非晶区、准晶区和晶区的含量.并研究了丝素在氯化钙浓溶液中的溶解性能和在稀盐酸中的吸酸性能,从而为蚕丝织物的炼漂、染色、整理工艺提供理论依据.

A method of determining the relative size-frequency distribution of the largest latent-image centres in photographic emulsion grains is proposed, based on a kinetic model of the development of individual emulsion grain under specific conditions. In the model chosen, one assumes an autocatalytic growth of the centres in the autocatalytic period, which terminates on reaching a critical mass by the largest latent-image centre with a change of the rate-determining step from electron transfer across the developer...

A method of determining the relative size-frequency distribution of the largest latent-image centres in photographic emulsion grains is proposed, based on a kinetic model of the development of individual emulsion grain under specific conditions. In the model chosen, one assumes an autocatalytic growth of the centres in the autocatalytic period, which terminates on reaching a critical mass by the largest latent-image centre with a change of the rate-determining step from electron transfer across the developer solution/developing centre interface to the interstitial silver ion migration from the interior of the grain towards the bottom of the developing centre. Then begins the fast reduction period, which is short compared with the autocatalytic period and brings the development process to its completion. Proceeding from this general concept, an expression is derived relating the relative size of the largest latent-image centre in an emulsion grain to the time required for its full development under constant emulsion grain type and specific development conditions:where Mi-mass of the largest latent-image centre in an emulsion grain,Mc——critical.mass of the development centre in an emulsion grain,t——time required for the emulsion grain to be fully developed,than——time of development required for an emulsion grain to reach Mc in the caseof Mi = 0.Experimentally, single grain layers of a monodisperse model emulsion are developed for different lengths of time in a solvents free surface developer. The exposure and development conditions are so adjusted that, at any time of development, the vast majority of the developed grains is totally reduced, and the increase in the fraction of developed grains with time of development represents an increase in the number of totally reduced grains. The developed grains are then bleached and the residual grains counted under optical microscope over a sample area comprising not less than 3000 grains to make the data statistically meaningful. The fraction of developed grains f is plotted against time of development t, which is then transformed into the relative mass Mo of the largest latent-image centre in the emulsion grain, using the above expression. Finally, one obtains, by numerical differentiation, the first derivatives -df/dM of the f-Mo curves atvarious points, which will represent the relative size-frequency distribution of the largestlatent-image centres in the emulsion grains. The distribution curves df/dM-M . forfive exposure levels have shown a steady increase in the number of larger centres at the expense of the smaller ones with increasing exposure. Two distinct maxima persistently appeared in the distribution curves, which will be an object of subsequent investigation.

本文根据显影过程电极理论的基本概念和单个乳剂颗粒显影过程的若干动力学特征,认为在特定的条件下,单个乳剂颗粒的显影过程可以分作两个阶段:自催化阶段和快速还原阶段。在自催化阶段,决定过程速度的是显影液/潜影中心界面上电子转移的步骤,这时过程的速度与显影中心表面积的大小成正比,反应具有自催化的性质。在快速还原阶段,乳剂颗粒内部填隙银离子向显影中心附近的迁徙成为决定过程速度的步骤;这一阶段与自催化阶段相比,持续的时间极短。在这种假设的基础上,通过乳剂颗粒显影时间的频率分布求出颗粒中最大潜影中心相对大小的频率分布。该方法适用于在同样的原始乳剂和显影的条件下比较乳剂颗粒中最大潜影中心的相对大小频率分布的情况。

Mixed ligand complexes are commonly formed in natural and biological fluids where various metal ions interact with various potential ligands. The formation of mixcd ligand complex may either obtained through simultaneous formation, stepwice formation or reproportionation.The Stabilization of the mixed species is considerably influenced by statistical effect, electrostatic effect, steric effect, cooprerative effect and covalency of the coordination bond. In biological systems mixed chelate complexes involving...

Mixed ligand complexes are commonly formed in natural and biological fluids where various metal ions interact with various potential ligands. The formation of mixcd ligand complex may either obtained through simultaneous formation, stepwice formation or reproportionation.The Stabilization of the mixed species is considerably influenced by statistical effect, electrostatic effect, steric effect, cooprerative effect and covalency of the coordination bond. In biological systems mixed chelate complexes involving amino acid and peptides have provided approximate models for activation process such as occur in metalloenzymes or metal activated enzymes (e.g. Carboxy peptidase A, Carbonic Anhydrase, Oxaloacetate Decarboxylase etc.) The mixed chelate complexes suggests an important rote for such species in the storage and transport of either metal ions or of donor molecules. Hence these complexes appears very important within organisms in which they are metabolized.

自然界特别是在生物体系中广泛地存在着混合型络合物。它的形成可以是一步同时生成或逐步生成,也可以是由单一型络合物混合生成。混合络合物的稳定性是由如下因素所决定的,即:统计效应,静电效应,共价键性,立体效应和配体的合作效应。在生物体内,混合络合物的形成涉及到:生物分子的稳定化和三维构象的稳定化,金属离子和配体分子的分布和运转,某些金属酶的催化作用(如脱羧酶、水解酶,羰基水化酶,碳酸酐酶等)及生物固氮等等问题。

 
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