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controlling reaction
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  控制反应
     Further more, controlling reaction time can control the content of in-situ transforming Fe3O4.The permeation rate of N2, O2, CO2, the thermal infrared emissivity and radar absorption of composite film were measured.
     通过控制反应时间可以控制Fe3O4在膜孔中的转化程度,从而可以有效地控制膜的孔径和孔径分布。 在性能研究方面,测试了复合膜对N2、O2、CO2的气体渗透速率的影响以及复合膜的热红外辐射和电磁波吸收性能。
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     Therefore,the inhibiting performance of PASP was improved by controlling reaction temperature and time,inhibiting effect of PASP synthesized under condition of 230℃ and 5h was the best,and the average molecular weight of which was about 10000.
     通过控制反应温度和时间能够改善PASP的阻垢性能,结果是230℃时反应5h所得PASP阻垢效果最好,此时PASP粘均分子量约为10000。
短句来源
     It is indicated by single factor experiments that using alcohol as the reaction solvent,controlling reaction temperature at 4 ℃,keeping ratio of ethanol to water at 6~8 and reaction pH at 2 is suitable for fractions of Phaffia rhodozyma to conversing carotenoids to astaxanthin.
     单因子试验结果显示,选择乙醇为反应溶剂,控制反应温度为4℃,乙醇与水的比例为6至8,反应pH值为2等反应参数较适于液氮破壁的法夫酵母菌体碎片转化类胡萝卜素为虾青素.
短句来源
     By controlling reaction condition in different steps and hydrogenated with Raney Ni,most of components were converted into industrial grade p-menthane without purification.
     实施分阶段控制反应条件,用雷尼镍催化,使大多数组分均加氢成对孟烷,无需提纯,即达到工业级的要求。
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     Synthesis of para aminophenol(PAP)is studied by hydrogenation of nitrobenzene over a Pt/C catalyst. It is found that the activity of the catalyst has little to do with its surface area and a high yield of PAP can be obtained through controlling reaction speed and conditions.
     研究硝基苯催化加氢工艺,发现Pt/C催化剂比表面积与其催化活性关系不大,控制反应速度和反应工艺条件,可得到高收率的对氨基苯酚;
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  改变反应
     The particles with average size of 15nm, fine dispersion and narrow-size distribution were obtained by controlling reaction conditions.
     改变反应条件 ,制备出了粒径分布窄、分散性良好的纳米 Sn O2 粒子 ,其平均粒径为 15 nm。
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  “controlling reaction”译为未确定词的双语例句
     The satisfactory results can be obtained by adding 3ml NaOH-KH2PO4 buffer solution of pH=6, 2ml CS2-ethanol solution of 1% volume fraction and 2ml CPC solution of 0.3% mass fraction,controlling reaction time 1h under 20 ̄30℃ water bath temperature and determining absorbance in 318nm incident wavelength.
     加入3mlpH为6的NaOH-KH2PO4缓冲液,再加入2ml体积分数1%CS2-乙醇溶液和2ml质量分数0.3%CPC溶液,控制水浴温度20 ̄30℃下反应1h,318nm处测定吸光度,能够得到较满意的分析结果。
短句来源
     Monodispersed CO3O4 nanocrystals with different size are synthesized by controlling reaction conditions in the solvothermal method, which can be self-assembled into 1D, 2D, 3D superstructure on the copper grid.
     在溶剂热体系中合成了不同尺寸单分散的Co_3O_4纳米晶,分散性好,尺寸均一,并在铜网上得到了它们的1D,2D,3D自组装结构。
短句来源
     The influences of temperature, space velocity and surface to volume ratio on the carbon deposition from methane pyrolysis in resistance furnace under 1310-2020℃ have been studied. The method for calculating the activation energy of controlling reaction directly from carbon deposition rate is suggested.
     在1310—2020℃范围内,研究了温度、接触时间、沉碳面积与反应空间体积之比对碳管炉中甲烷热解沉碳过程的影响,并从沉碳速度随温度的变化关系出发,讨论和提出了从沉碳速度直接计算反应控制步骤活化能的方法。
短句来源
     The extraction kinetics and interfacial chemistry study indiate that the process of aluminium extraction by micella mixed extraction system(D2EHPA-M1PA) is controlled by the chemical reaction in combination with diffusion, while the controlling reaction occurred inside the micella phase.
     结果表明,混合体系界面活性下降,D2EHPA-M_1PA萃取Al~(3+)的过程为扩散和化学反应共同控制机制。
短句来源
     The results indicate that highyield and fine granular nickel hydroxide can be achieved when the temperature is above 95 ℃ and the mol rate of urea and nickel nitrate is 3∶1.Nickel hydroxide power in the diameter of 04~05 μm is available by controlling reaction conditions.
     结果表明,在95℃以上温度下,n尿素:nNi2+=3∶1时,可得到粒度较细,平均粒径在0 4~0 5μm左右的Ni(OH)2粉体,且收率较高。
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  controlling reaction
The measured rates are consistent, with the rate-controlling reaction being the dissociation of H2O on the surface.
      
When the activity ratio of hydrogen ion to ferric ion is low, and especially when the concentration of Fe3+ is greater than 0.15 M, oxidative dissolution of PbS becomes the controlling reaction.
      
The rate controlling reaction for the CO-H2 reaction is the formation of (H2CO)° and the rate constant is about a factor of five greater than that for carburization in CO alone.
      
The rate controlling reaction in CO-He atmospheres is interpreted to be the formation of the activated complex (CO)?2 and the results indicate that CO and carbon are adsorbed on solid iron and affect the rates.
      
By properly controlling reaction conditions, high crystalline undoped and Mg-doped strontium titanates with the dominating perovskite structures could be obtained directly at 80 °C.
      
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One of the main difficulties encountered in catalytic cracking of shale oil is the poisoning effect of organic nitrogen bases on silica-alumina catalysts. Employing dealkylation of cumene as the controlling reaction, the authors investigated the poisoning action of pyridine on a silica-alumina catalyst. The authors surveyed the earlier works critically, and proved that in the Frost's equation, not only does 伪 depend upon internal diffusion, but also 尾 is related to external diffusion. Therefore, this equation...

One of the main difficulties encountered in catalytic cracking of shale oil is the poisoning effect of organic nitrogen bases on silica-alumina catalysts. Employing dealkylation of cumene as the controlling reaction, the authors investigated the poisoning action of pyridine on a silica-alumina catalyst. The authors surveyed the earlier works critically, and proved that in the Frost's equation, not only does 伪 depend upon internal diffusion, but also 尾 is related to external diffusion. Therefore, this equation has to be treated as an empirical one generally. Macrokinetic calculations show that when external diffusion plays an important role, Wheeler's calculation method should also be considered as an empirical and conditional one. The pyridine-poisoning curves demonstrate that there are at least two types of acidic active centres and one type of polar centre present on silicaalumina catalyst. The adsorption of pyridine on protonic acid centres is selective. On the same kind of acid centre, pyridine is adsorbed homogeneously, so the poisoning curve gains "anti-selective" shape. Experiments justify the activation action of water and the deactivation effect of excess amount of water. On account of these facts, the authors suggest a new view point with respect to the structure of the active centres on silica-alumina catalyst as well as to the deactivation mechanism.

頁岩油催化裂化的主要困難之一是有機氮碱對硅鋁催化劑的毒害作用.本文以異丙基苯的裂化作為控制反應,用動力學方法考察了硅鋁催化劑為吡啶中毒的情况. 作者批判性地總結了前人的工作,並證明公式中,不僅α取决於內部擴散,且β與外部擴散有關,因此公式一般只能作為經驗公式應用.宏觀動力學計算表明,當外部擴散起作用時,Wheeler的計算方法也只能認為是經驗性的及條件性的。吡啶中毒曲线表明,硅鋁催化劑上至少有兩種酸性活性中心及一種極性中心存在.吡啶對質子酸中心有選擇性吸附作用;但在同類中心上,吡啶的吸附則是均匀的,因而中毒曲线呈现“反選擇性”。實驗也證實了水分的活化作用及過量水分的去活化作用.據此,作者對硅鋁催化劑活性中心結構及其中毒機理提出了新的觀點。

The influences of temperature, space velocity and surface to volume ratio on the carbon deposition from methane pyrolysis in resistance furnace under 1310-2020℃ have been studied. The method for calculating the activation energy of controlling reaction directly from carbon deposition rate is suggested.If the experiment is so designed that carbon can be deposited steadily in the flow system with constant temperature, the rate of carbon deposition is in direct proportion to the gas phase methane decomposition...

The influences of temperature, space velocity and surface to volume ratio on the carbon deposition from methane pyrolysis in resistance furnace under 1310-2020℃ have been studied. The method for calculating the activation energy of controlling reaction directly from carbon deposition rate is suggested.If the experiment is so designed that carbon can be deposited steadily in the flow system with constant temperature, the rate of carbon deposition is in direct proportion to the gas phase methane decomposition rate with the proportional constant related to the geometry of the furnace. Consequently, an approximate linear relationship between ln v_5 (carbon deposition rate) and 1/T is obtained with low methane decomposition. From experimental data, the activation energy is found to be 112 kcal/mol and preexponential factor A 10~(14.4)s~(-1).These values approximates the corresponding data for initial step of gas phase methane decomposition CH_4→CH_3 + H or CH_4→CH_2 + H_2Under the present experimental conditions, carbon deposition rate increases with the decrease of contact time and S/V ratio to certain limit. The optimum gas velocity is 5 1 (NTP)/min.

在1310—2020℃范围内,研究了温度、接触时间、沉碳面积与反应空间体积之比对碳管炉中甲烷热解沉碳过程的影响,并从沉碳速度随温度的变化关系出发,讨论和提出了从沉碳速度直接计算反应控制步骤活化能的方法。如果实验设计满足恒温流动体系稳态沉碳条件时,沉碳速度与甲烷气相分解速度成正比,比例系数足一个与设备几何条件有关的常数。由此推论,1nv_s与1/T(v_s为沉碳速度,T为热解沉碳绝对温度)在甲烷低分解率条件下,应近似呈线性关系。从直线的斜率和截距,可以分别计算出甲烷气相热解控制步骤的活化能E=112kcal/mol,频率因子A=10~(14·4)s~(-1)。这与甲烷气相分解初始步骤CH_4→CH_3+H或CH_4→CH_2+H_2的相应数据很接近,由此证实上述推算方法是成功的。

Poly (vinyl butyral) could be grafted with acrylamide by Ce (Ⅳ) method. Copolymer with variable percent graft and average length of PAmgrafting chains could be obtained by controlling reaction conditions. The examined antithrombogenic properties showed that the copolymer with percent graft 15-25% and the average length of P Am grafting chains longer than 4×10~4 possessed better blood compatibility.

本文用实验方法测定了聚乙烯醇缩丁醛接枝前后的吸水率、接触角、蛋白吸附特性,表明接枝后由于吸水率加大,白蛋白吸附量提高,与水界面接触角下降,初步认为它的血液相容性将随之改善。以全凝血时间、复钙时间、血液灌流血小板下降率作为表征指标,测定了接枝前后材料抗凝血性能的变化。实验结果表明:接枝后全凝血时间、复钙时间明显加长,血小板下降率降低。实验还测定了接枝前后材料对血细胞作用以及对尿毒素的渗透性能,实验表明接枝后材料对血细胞不产生明显的影响,有效地改善了材料的渗透性能。 在此基础上,为确定适宜的亲疏水比例,实验还测定了接枝率对抗凝血性能的影响,结果表明在实验范围内接枝率12—25%较宜。实验还同时测定了接枝链长对抗凝血性能的影响,结果表明:接枝链长Mn>4×10~4时抗凝血性能较优。

 
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