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转换数
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  turnover number
     The catalase reaction obeyed the Michaelis-Menten kinetics,and at 298.15 K and pH 7.0,the Michaelis constant (Km),the turnover number and the molar enthalpy(ΔrHm)of the reaction were 2.36×10-2 mol/L,1.20×104s-1 and-83.67 kJ·mol-1,respectively.
     该反应遵循Michaelis-Menten动力学,298.15K和pH7.0时,其米氏常数、酶转换数以及摩尔反应焓分别为2.36×10-2mol/L、1.20×104s-1和-83.67kJ·mol-1。
短句来源
     Results The turnover number(TN) of hALRp in sulfhydryl oxidase activity assay was 1.25±0.21,while TN was 0 of hALRp-C65A,there was significant difference between them(P<0.05).
     结果:在巯基氧化酶活性实验中,酶活性以转换数(TN)表示,hALR组TN=1.25±0.21,而hALR-C65A组TN=0,与hALR组比较差异有显著性(P<0.05)。
短句来源
     The greater maximal velocity (Vmax) of AChE from the resistant strain appeared to be due to both the increased turnover number and the higher concentration of AChE active site.
     家蝇抗性品系AChE较大的最大速率(Vmax)值是由抗性品系AChE的底物转换数较大以及酶活性位点的含量较高同时引起的。
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  “转换数”译为未确定词的双语例句
     min and the kcat was 2863s~ -1 。
     min,转换数(kcat)为2863s~(-1)。
短句来源
     The highest catalytic activity of Ru3(CO) 12/CsI/CsOH/THF system is observed and the turnover is 285 overall products, mol/Ru3(CO)12, mol. h. The IR spectrum of the solution after reaction indicates the presence of [HRu3(CO)H]~as a main component.
     由Ru_3(CO)_(12)/CSI/CsOH/THF/H_2O组成的体系,催化转换数高达285mol总产物/Ru_3(CO)_(12),mol·h。
短句来源
     2) TS/TV rations is 0.7, transversion is slightly higher than transition.
     2) TS/TV为0.7,颠换数略高于转换数
短句来源
     The number of transition G-A and T-C were 22, 15 respectively, which were higher than that of transition A-G and C-T, the number of tranversion C-A, T-G is 2 respectively, and other tranversion patterns didn't occur;
     序列间G→A和T→C的转换数(22次和15次)高于A→G和C→T的转换数(10次和9次),C→A、T→G颠换数均为2次,其余颠换模式均未发生;
短句来源
     the probability of transition (Ts) was higher than that of tranversion (Tv) , Ts/Tv = 9.5-19, there was the highest number oftransition in the third codon.
     转换数(Ts)明显高于颠换数(Tv),Ts/Tv=9.5~19,密码子第三位点的转换数最高,呈现了相当强烈的转换偏倚性;
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短句来源
     Friendly Number
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  turnover number
The degree of disorders in the 3'-terminal nucleotide positioning in the presence of both substrates correlates with decrease in the turnover number of aminoacylation due to corresponding mutations.
      
Addition of albumin increased turnover number of naphthols oxidation 1.5-4 times.
      
It is possible to raise the turnover number of the catalyst by conducting the reaction in several successive runs without regenerating or separating the catalyst.
      
It is possible to raise the turnover number of the catalyst by conducting the reaction in several successive runs without regenerating or separating the catalyst.
      
The best result was obtained upon the oxidation catalyzed by OsCl3 at 70°C for 3 h in the absence of solvent: the total yield of the corresponding aldehyde and cyanoacetic acid reached 90%, and the turnover number was 1500.
      
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An effective homogeneous catalytic system for hydroformylation of ethylene has been found. It involves ruthenium cluster H4Ru4(CO)12 or Ru3(CO)12,halide and alkali metal cation promoters in a basic aqueous tetrahydrofuran solution. In the range of reaction temperature 125-175C. at total pressure of ethylene, H2 and CO(1: 2- 2) of less than 75kg/cm2, the catalytic activity is proportional to reaction temperature and partial pressures of ethylene, H2 and CO. Addition of halide and alkali metal cation promoters...

An effective homogeneous catalytic system for hydroformylation of ethylene has been found. It involves ruthenium cluster H4Ru4(CO)12 or Ru3(CO)12,halide and alkali metal cation promoters in a basic aqueous tetrahydrofuran solution. In the range of reaction temperature 125-175C. at total pressure of ethylene, H2 and CO(1: 2- 2) of less than 75kg/cm2, the catalytic activity is proportional to reaction temperature and partial pressures of ethylene, H2 and CO. Addition of halide and alkali metal cation promoters greatly increases the catalytic activity in the following sequence: NaI/NaOH

发现了乙烯醛化的一个有效的新催化体系,它由钌原子簇H_4Ru_4(CO)_(12)或Ru_3(CO)_(12),卤化物和碱金属阳离子促进剂组成。在碱性的四氢呋喃-水溶液中,C_2H_4,H_2和CO的分压为1:2:2(总压小于75kg/cm~2)及125~175℃的条件下,其催化活性正比于反应温度、C_2H_4、H_2和CO的分压。添加卤化物和碱金属阳离子极大地提高了催化活性并得到如下顺序:NaI/NaOH 转换数高达285mol总产物/Ru_3(CO)_(12),mol·h。根据催化活性和活性物种的对应关系,探讨了催化活性中心、添加剂作用和钌羰基阴离子[HRu_3(CO)_(11)]—的催化循环机理。

In this paper an improved mathematical model of Tzeghai [1] is presented herein to determine the effect of convection and leaky junction on macromolecular transport across the artery wall.Two importent improvements are: (1) The boundary condition at exit is improved to obtain a simple analytic solution. The spending computational time decreased ten times to one hundred times and both results cannot be identified the difference in figure. (2). The arteral wall is considered as non-isotropy. The results from this...

In this paper an improved mathematical model of Tzeghai [1] is presented herein to determine the effect of convection and leaky junction on macromolecular transport across the artery wall.Two importent improvements are: (1) The boundary condition at exit is improved to obtain a simple analytic solution. The spending computational time decreased ten times to one hundred times and both results cannot be identified the difference in figure. (2). The arteral wall is considered as non-isotropy. The results from this model show that the effect of convection on macromolecular transport is importent for cell turnover rates greater than 1% and explains the very large increase in uptake observed experimentally after artificially extensive endothelial damage.

本文对Tzeghai [1]等大分子传质模型进行了两点重要改进:(1)改进了缝隙出口处边界条件的提法,从而得到了简单的分析解,比他们的数值解节省了计算时间几十倍甚至上百倍,而结果在图形上分辨不出差别来。(2)考虑动脉壁的非各向同性效应。计算结果表明,对于转换数大于1%,对流影响较大,特别是对于薄的动脉壁,对流影响不能忽略。说明了实验上所观察到的人工诱导的广泛的细胞损伤所产生的吸收量增加很大可能由于对流的作用。

Microcalorimetry and thermokinetic equations were used to study H2O2 decomposition by beef liver catalase.The catalase reaction obeyed the Michaelis-Menten kinetics,and at 298.15 K and pH 7.0,the Michaelis constant (Km),the turnover number and the molar enthalpy(ΔrHm)of the reaction were 2.36×10-2 mol/L,1.20×104s-1 and-83.67 kJ·mol-1,respectively.The later period of catalase reaction was a first order reaction for H2O2,=6.31×105L·mol-1·s-1 and k1=6.31×10-5/[Eo]s-1,respectively.The catalase reaction obeyed Ogura...

Microcalorimetry and thermokinetic equations were used to study H2O2 decomposition by beef liver catalase.The catalase reaction obeyed the Michaelis-Menten kinetics,and at 298.15 K and pH 7.0,the Michaelis constant (Km),the turnover number and the molar enthalpy(ΔrHm)of the reaction were 2.36×10-2 mol/L,1.20×104s-1 and-83.67 kJ·mol-1,respectively.The later period of catalase reaction was a first order reaction for H2O2,=6.31×105L·mol-1·s-1 and k1=6.31×10-5/[Eo]s-1,respectively.The catalase reaction obeyed Ogura mechanism,and the ternary complex decomposition rate constant was 6.00×103s-1.

利用微量热法和热动力学方程研究了过氢化氢酶反应。该反应遵循Michaelis-Menten动力学,298.15K和pH7.0时,其米氏常数、酶转换数以及摩尔反应焓分别为2.36×10-2mol/L、1.20×104s-1和-83.67kJ·mol-1。过氧化氢酶反应后期对底物是一级反应,其总反应速度常数和一级速度常数分别为ko=6.31×105L·mol-1·s-1和k1=6.31×105/[Eo]s-1。该反应服从Ogura机理,其酶-底物三元复合物的分解速度常数为6.00×103s-1。

 
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