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酶活
相关语句
  enzyme activity
    Effect of Modification of L-asparaginase by Chitosan on Enzyme Activity and Antigenity
    壳聚糖修饰L-天门冬酰胺酶对酶活及抗原的影响
短句来源
    4. The data of enzyme activity demonstrates that Na"1", K+ and Li have no effect on the activity of AKP, while Cu2+, Co2*, Ni2+, Hg2*, Ag+, Zn2+ have inhibitory effect on the activity of AKP.
    4.酶活测试表明过渡金属离子Ni~(2+)、Co~(2+)、Cu~(2+)及Zn~(2+)对小牛肠AKP活性具有抑制作用,其中一定浓度的Zn~(2+)可使酶活完全丧失。
短句来源
    The immobilized enzyme activity was 1500U·g-1 and the activity yield was more than 80%.
    在此条件下制得的固定化菌体比酶活达到1500U·g-1,酶活保留率超过80%。
短句来源
    69 Strains with carrageenan degrading activity were isolated from marine environment after repeating enrichment and selection. After treated by ultraviolet and EMS, a mutant M2-4-4 was produced from Cytophaga MCA-2, with a higher enzyme activity of 66U/ml.
    经过多次富集和反复筛选,从海洋环境中筛选到69株具有卡拉胶降解活性的菌株,以产酶活力高、生物学性状优良的MCA-2菌株(Cytophaga)为出发菌株,进行复合诱变和自然选育,获得了一株酶活显著提高的突变株M2-4-4,发酵液产酶活力达到66U/ml。
短句来源
    Moreover, the relationship between immobilized enzyme activity and the structure of carriers, was indicated.
    合成出具有较高酶活的载体,找出酶活与载体结构的关系,是解决固定化酶活性的关键问题。
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  enzyme activities
    Mn 2+ ions enhanced xyl II enzyme activity by 2.7-fold whereas Fe 3+ completely inhibited enzyme activities.
    Mn2 + 对xylⅡ酶反应具有促进作用 ,将酶活提高了 2 7倍 ,而Fe3+ 对该酶反应起完全抑制作用。
短句来源
    These data obtained are essential to purify cellulase by high pressure CO2. The experimental results indicate that CO2 pressure is not the key factor of the loss of enzyme activities, but ethanol concentration and temperature markedly influence recovered activities.
    实验表明,CO2压力不是酶活损失的主要因素,乙醇浓度和温度对酶活损失的影响较大.
短句来源
  “酶活”译为未确定词的双语例句
    However, the enzyme is totally inactivated by heat treatment at 55℃ for 30min or 60℃ for 10min.
    该酶经55℃处理30min或60℃处理10min后酶活将完全丧失,在中性环境中(pH5-8)酶活稳定。
短句来源
    Ce(NO3)3 serves as capturer. Substrate is catalysed by immobilized oxidase on the electrode to produceH2O2 and the H2O2 is captured by Ce(NO3)3 to form precipitate. The precipitation deposited the active site of immobilized oxidase.
    以Ce(NO_3)_3为捕捉剂,与底物经氧化酶催化作用的产物H_2O_2反应,在酶活的原位生成铈的沉淀,利用X-射线能谱仪进行定位分析,得到了电极上酶活的分布情况。
短句来源
    Specific activity of LOX 9.42×107 U/g solid obtained by base-solubilizing and acid-depositing followed by two salt-out steps is highest of all.
    碱溶酸沉后经二次盐析得到的酶比酶活最高,达到9.42×107 U/g 固形物。
短句来源
    When kept at 0~4℃ for 20 days the enzyme preparation loses activity by 19.2% for atlapulgite or 17.7% for talc, and remain constant in the followed two months.
    优化条件下获得的以活性白土为载体的酶制剂和以滑石粉为载体的酶制剂在0~4℃冷藏保存20天后酶活损失分别为19.2%及17.7%,远低于粗酶液的酶活损失,并在此后两个月内基本保持酶活损失不再增加。
短句来源
    CCBE was stable at pH 4.0 - 7.8 and 30~50℃.
    其羧甲基纤维素酶活性在30℃~50℃之间非常稳定,60℃作用30 min其相对残余酶活保留84 %。
短句来源
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  enzyme activity
The effect of the most promising ones have been looked on the counterparts from mammalian sources and difference in the susceptibility towards enzyme activity inhibition were noted.
      
The results indicated that cancer stem cells show a higher level of enzyme activity than non-stem cells.
      
The Cu2+ had strong restrictive effect on enzyme activity.
      
A rapid but transient decrease in the enzyme activity was observed after 9-12 h after adding glucose to the culture medium.
      
In the first case, the enzyme activity adsorbed on residual solids after extended hydrolysis was used for hydrolysis of the newly added substrate.
      
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  enzyme activities
korshinski plantations to assess the effects of the shrub on the physical and chemical properties of the soil as well as enzyme activities.
      
Inhibitor analysis and studies of enzyme activities with synthetic substrates demonstrated that the culture liquid of Fusarium culmorum contained serine proteinases of various classes.
      
Effects of temperature and pH on the enzyme activities, their stabilities under various conditions, and the kinetics of exhaustive hydrolysis of glucuronoxylan and arabinoxylan were studied.
      
The induction of these enzyme activities depends on the concentration of preparations and plant immune status.
      
The induction of glyoxylate cycle enzyme activities was revealed in the liver and other organs of starving rats.
      
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  activity of enzyme
Studies of hydrolytic activity of enzyme preparations of Penicillium and Trychoderma fungi
      
Microencapsulated PAL has an apparent enzyme activity that is 20% of the activity of enzyme in free solution.
      
Supplementation of fermentation medium with external nitrogen (organic and inorganic) showed a mixed impact on bacterial activity of enzyme synthesis.
      
When the quantity of extract or of cells is increased, the specific activity of enzyme, measured by the Warburg manometric method, decreases.
      
The activity of enzyme recovered by elution after electrophoresis in non-denaturing polyacrylamide gels was wholly dependent on pyridoxamine 5-phosphate.
      
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Saccharogenic α-amylase had an isoelectric point pH5.16, molecular weight 42,000~45,000, and the ultraviolet absorbance E_(280)/E_(260)=1.80. The enzyme protein was composed of 396 amino acid residues. The pH stability range was between pH5.0 and 8.5. The heat stability range was below 40—50℃, The optimum pH for action was pH5.5 and the optimum temperature, 66℃. The Michaelis constant for soluble starch was 0.057 and the maximum reacting velocity was 1.3 micromoles per minute per millihter per unit of the enzyme....

Saccharogenic α-amylase had an isoelectric point pH5.16, molecular weight 42,000~45,000, and the ultraviolet absorbance E_(280)/E_(260)=1.80. The enzyme protein was composed of 396 amino acid residues. The pH stability range was between pH5.0 and 8.5. The heat stability range was below 40—50℃, The optimum pH for action was pH5.5 and the optimum temperature, 66℃. The Michaelis constant for soluble starch was 0.057 and the maximum reacting velocity was 1.3 micromoles per minute per millihter per unit of the enzyme. Some metal ions, such as Na~+, K~+, Ca~(++)and Ba~(++) had activating action to the enzyme, but the ions of pb~(++), Hg~(++), Fe~(+++) and some reagents had inhibiting action to it.

糖化型α-淀粉酶等电点为pH5.16,分子量为42,000~45,000,紫外吸收值E_(280)/E_(260)=1.80,由396个氨基酸残基所组成,pH稳定范围5.0—8.5,温度稳定范围40—50℃以下,最适作用pH为5.5,最适作用温度66℃,对可溶性淀粉的米氏常数为0.057,最大反应速度为1.3微克分子/分钟·毫升·单位酶活,钠、钾、钙钡等离子有活化作用,铅、汞、铁离子及巯基试剂有抑制作用。

Actinidin, a thiol protease, was isolated and purified from the fruit of Actinidia chinensis, by pH regulation. ammonium sulfate fractionation, precipitating pectin and DEAE-cellulose chromatography. The purified enzyme was found to be homogeneous in polyacrylamide gel electrophoresis. Na2S2Q4 or 2-mercaptoethanol could stabilize the enzyme activity during purification process.The optimal pH and optimal temperature of this enzyme for the hydrolysis of bovine carbxyhemoglobin were found to be 3.7 4.0 and 45-50℃,...

Actinidin, a thiol protease, was isolated and purified from the fruit of Actinidia chinensis, by pH regulation. ammonium sulfate fractionation, precipitating pectin and DEAE-cellulose chromatography. The purified enzyme was found to be homogeneous in polyacrylamide gel electrophoresis. Na2S2Q4 or 2-mercaptoethanol could stabilize the enzyme activity during purification process.The optimal pH and optimal temperature of this enzyme for the hydrolysis of bovine carbxyhemoglobin were found to be 3.7 4.0 and 45-50℃, respectively.The Michaelis constant (Km) and catalytic constant (kcat) of this enzyme were measured to be 2.78×10-5M and 2.01×102min-1 respectively pH had no effect on tne Michaelis constant. It was found that energy activation(Ea) of the enzyme is 6.48kcal/mol and the protective effect of DTT is quite evident on incubation at 60 or 70℃ for 10 minutes.

以中华猕猴桃鲜果为材料,经调节pH,硫酸铵盐析,除果胶以及DEAE—纤维素(E22)柱层折纯化,获得电泳单一区带酶制剂。以牛碳氧血红蛋白为底物,酶的最适温度为45—50℃,最适pH为3.7—4.0,K_m值为2.78×10~(-5)M,K_(cat)为2.01×10~2/min,pH影响V_(max)而不影响K_m值,表现为非竞争性抑制作用。该酶的活活化能为6.84kcal/mol,ΔH为6.24—6.20kcal/mol(30—50℃),同时还进行了酶的热稳定性研究。

The influences of molecular weight of PEG, concentrations of PEG and potassium phosphate, the amounts of protein and concentration efficiency were studied. The optimum conditions of aqueous two-phase systems for separating aspartase, cellulase and lipase from the crude aspartase, industrial cellulase and lipase respectively are devised.

用聚乙二醇(PEG)/磷酸钾双水相抽提技术分别从天冬氨酸粗酶、商品纤维素酶和脂肪酶中分离纯化出天冬氨酸酶(Aspartase)、纤维素酶(Cellulase)和脂肪酶(Lipase)。研究了PEG分子量及浓度、磷酸钾浓度、蛋白质含量、pH、氯化钠浓度等因素对分配系数,酶活回收率和分离效果等参数的影响,并设计出双水相体系抽提三种酶的相组成系统。

 
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