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   负催化作用 的翻译结果: 查询用时:0.526秒
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负催化作用
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  negative catalysis
     TiO 2 and B 2O 3 has negative catalysis and catalytic order is:B 2O 3>TiO 2.Catalytic effect of MgO is not determined.
     Ti O2 ,B2 O3 具有负催化作用 ,作用顺序为 :B2 O3 >Ti O2 ; Mg O几乎不起作用 .
短句来源
  minus catalytic
     A new method for the determination of trace Zn\+\{2+\} was developed. It is based on the minus catalytic effect of Zn\+\{2+\} on the oxidation of methyl red with H\-2O\-2 in the medium of alcohol. The best condition of determination was determined by experiment.
     研究了在乙醇介质中 Zn2 + 对过氧化氢氧化甲基红褪色反应的负催化作用 ,提出了测定痕量Zn2 +的新方法 ,通过实验确定了测定的最佳条件 .
短句来源
  negative catalytic effect
     s: A new negative catalytic kinetic spectrophotometric method for the determination of trace cobalt is proposed which is based on the negative catalytic effect of cobalt(Ⅱ) on the oxidation of neutral red by hydrogen peroxide in a medium of HAc-NaAc and NaF.
     在HAc-NaAc缓冲液和氟化钠存在的情况下,Co(Ⅱ)对过氧化氢氧化中性红的反应有较强的负催化作用,利用此性质建立了负催化动力学光度法测定痕量钴的方法.
短句来源
     The lower coke thermal properties higher negative catalytic effect.
     无论是单种煤还是配合煤,硼的负催化作用明显,焦炭热性质越差,硼对焦炭反应性的降低和反应后强度的增加作用越大;
短句来源
  “负催化作用”译为未确定词的双语例句
     The result shows that alkaline earth oxides such as BaO,CaO,MgO and transition metal oxides such as Fe_2O_3,CuO,V_2O_5 and sulfur oxides such as SO_3 have positive catalytic effect on coke reactivity,but there is a saturation point for Fe_2O_3,CuO,V_2O_5 and MgO·B_2O_3,TiO_2 and AlF_3 have negative effect.
     结果表明:碱土金属氧化物BaO、CaO、MgO和过渡金属氧化物Fe2O3、CuO、V2O5及硫的氧化物SO3对焦炭的反应性起正催化作用,但Fe2O3、CuO、V2O5和MgO的催化作用随添加量的增加有一个饱和点; B2O3、TiO2和AlF3对焦炭反应性有负催化作用
短句来源
     The negtive-catalysis of Fe(Ⅲ)、Cr(Ⅲ)on the decomposition of H_2O_2 in certain conditions reported in the literatures in explained in thepaper.
     对Fe(Ⅲ)、Cr(Ⅲ)在特殊条件下对H_2O_2分解的负催化作用进行了研究。
短句来源
     The author considers that the reason of generating the negtive-catalysisis the hydrolysis and polymerization of Fe(Ⅲ)、 Cr(Ⅲ).
     认为Fe(Ⅲ)、Cr(Ⅲ)的水解、聚合是产生负催化作用的原因。
短句来源
     In light of the fact that methanol has a very strong negative cata ly tic action on oxidative decolorization of K2S2O8 and brilliant green.
     基于甲醇对K2S2O8与亮绿间的氧化裉色反应有强烈的负催化作用,从而建立了一种测定甲醇动力学光度新方法.
短句来源
     In alkaline medium,based on the nagative catalytic effect of trace amounts of cobalt and triethanolamine on the oxidation of xylene cyanol FF by hydrogen peroxide and the linear relationship between cobalt content and the increment of absorbency,a new nagative catalytic spectrophotometric method for determination of trace amounts of cobalt was established.
     在碱性条件下,痕量钴 与三乙醇胺对H2O2氧化二甲苯蓝FF的反应有较强的负催化作用,钴含量与吸光度的增加值呈线性关系,据此建立了负催化光度法测定痕量钴的新方法。
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      negative catalysis
    The negative catalysis can be explained by nonproductive binding, leading to an increase of the activation energy barrier and a decrease of the reaction rate.
          
    Positive and negative catalysis of an and an-explosive combustion and its implications for mine safety
          
    Negative catalysis by copper ions in the chain reaction of oxidation of cyclohexanol
          
    Negative catalysis by stearates of metals of variable valence in the chain reaction of oxidation of cyclohexanol
          
    Negative catalysis by salts of variable valence metals in reactions for oxidation of aliphatic amines by molecular oxygen
          
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    The effect of SCN- and I- on corrosion behavior of iron in 0. 5 mol·L-1H2SO4 were investigated by potentiodynamic and polarization resistance techniques. Experimental results show that there exist negative catalytic effect for the corrosion process of iron at lower concentration region of SCN-,and positive catalytic effect at higher concentration region of SCN-. A mechanism which explains thiocyanate ion participating in anodic and cathodic processes of iron corrosion is proposed in sulfuric acid solution. As...

    The effect of SCN- and I- on corrosion behavior of iron in 0. 5 mol·L-1H2SO4 were investigated by potentiodynamic and polarization resistance techniques. Experimental results show that there exist negative catalytic effect for the corrosion process of iron at lower concentration region of SCN-,and positive catalytic effect at higher concentration region of SCN-. A mechanism which explains thiocyanate ion participating in anodic and cathodic processes of iron corrosion is proposed in sulfuric acid solution. As regards I-,it can inhibit corrosion process of iron because of blocking effect.

    采用极化曲线和极化电阻法研究了0.5mol·L-1H2SO4介质中SCN-及I-对工业纯铁腐蚀行为的影响.结果表明,低浓度的SCN-对铁的腐蚀过程有负催化作用,较高浓度的SCN-有正催化作用.本文提出了在负催化作用条件下SCN-参与铁腐蚀的阴、阳极反应机理.至于I-则通过复盖效应阻化铁的腐蚀过程.

    The negtive-catalysis of Fe(Ⅲ)、Cr(Ⅲ)on the decomposition of H_2O_2 in certain conditions reported in the literatures in explained in thepaper. The author considers that the reason of generating the negtive-catalysisis the hydrolysis and polymerization of Fe(Ⅲ)、 Cr(Ⅲ).

    对Fe(Ⅲ)、Cr(Ⅲ)在特殊条件下对H_2O_2分解的负催化作用进行了研究。认为Fe(Ⅲ)、Cr(Ⅲ)的水解、聚合是产生负催化作用的原因。

    The deacylation reactions ofp-nitrophenyl propionate and acetate in buffered aqueous solution with and without am-monia and the effects of cetyltrimethylanunnium brothede (CTAB) dricelle on them have been investigated. The pseudo first order rate constant of the deacylation reaction in the buffer with ammnia shows higher value than that in the buffer of the same pH but without imonia. CTAB Ancelles show positive catalysis on the reaction in the system without anunonia no matter what pH is. But in systems including...

    The deacylation reactions ofp-nitrophenyl propionate and acetate in buffered aqueous solution with and without am-monia and the effects of cetyltrimethylanunnium brothede (CTAB) dricelle on them have been investigated. The pseudo first order rate constant of the deacylation reaction in the buffer with ammnia shows higher value than that in the buffer of the same pH but without imonia. CTAB Ancelles show positive catalysis on the reaction in the system without anunonia no matter what pH is. But in systems including ammonia, CTAB Ancelle shows catalytic effect at high pH and negative catalytic effect when the pH is lower than 9.6. These interesting phenomena have been attributed to that the mechanism of deacylation reaction in buffer with and without aJmmnia are different. Only hydrolysis occurs in the systems without ammonia, whereas both hydrolysis and anwnnolysis exist in the systems with amxnonia. Actually, CTAB dricelle can only enhance the reaction rate of hydrolysis but reduce that of arnmonolysis.

    较系统地研究了在有氨和无氨缓冲体系中pH变化对羧酯脱酰反应速度和胶团催化作用的影响.提供在两种缓冲体系中反应速度随溶液pH变化的规律.结果表明CTAB胶团对对硝基本酚丙酸酯和乙酸酯碱水解反应的催化效率随溶液pH上升而削弱.对硝基本酚丙酸酯和乙酸酯在含氨的缓冲体系中有水解和氨解反应同时进行.CTAB胶团对水解反应有正催化作用,而对氨解反应则显示负催化作用.这使得NH3-NH4Br缓冲体系中CTAB胶团对体系总反应速度的影响随溶液pH降低从正催化变为负催化.

     
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