助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   活性( 的翻译结果: 查询用时:0.069秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

活性
相关语句
  activity
     Effect of puerarim on renal hypertensive and plasma renin activity(PRA)
     葛根素对肾性高血压和血浆肾素活性(PRA)的影响
短句来源
     Electronic Structure and Catalytic Oxidation Activity on Some Fe Dioxygen Complexes Involving Nitrogen Element (Ⅱ)——The Efect of the Equatorrial LigandElectronic Structure and Catalytic Oxidation Activity on Some Fe Dioxygen Complexes Involving
     几种铁的含氮双氧配合物的电子结构与催化氧化活性(Ⅱ)——赤道配体的作用
短句来源
     SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF 2, 4-DIAMINO-5-(SUBSTITUTED-ANILINO) PYRIMIDINES
     2,4-二氨基-5-取代苯胺基嘧啶类化合物的合成及抗菌活性(二)
短句来源
     SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF 2,4-DIAMINO-5-ALROXYL ANILINO PYRIMIDINES (三)
     2,4-二氨基-5-烷氧基苯氨基嘧啶类化合物的合成及抗菌活性(三)
短句来源
     SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF 7β-(4, 7-DISUBS-TITUTED COUMARIN-3-ACETAMIDO)CEPHALOSPORIN DERIVATIVES
     7β-(4,7-二取代香豆素-3-乙酰胺基)头孢菌素衍生物的合成及抗菌活性(英文)
短句来源
更多       
  “活性(”译为未确定词的双语例句
     A Study of Chiral Liquid Crystals Ⅰ. Syntheses and Properties of Optically Active Esters of (+)-p-(2-Methylbutoxy)-benzoic Acid
     手性液晶的研究——Ⅰ.光活性(+)-对-(2-甲基丁氧基)苯甲酸酯类液晶的合成和性能
短句来源
     A STUDY OF CHIRAL LIQUID CRYSTALS——Ⅱ. Syntheses and Properties of Optically Active Liquid Crystals of (+)-p-Phenylene (and Its Derivatives)-and (+)-4, 4'-Biphenylene-Bis- (p-2-Methylbutoxy benzoates)
     手性液晶的研究——Ⅱ.光活性(+)-双-(对-2-甲基丁氧基苯甲酸)-对’-苯二酚(及其衍生物)和4,4’-联苯二酚酯类液晶的合成和性能
短句来源
     Energy Gaps and Catalytic Properties of Oxides
     氧化物的禁带宽度与催化活性(英文)
短句来源
     A STUDY OF CHIRAL LIQUID CRYSTALS Ⅲ Syntheses and properties of optically active esters of (+)-p-2-methylbutyloxy-phenylp-alkyloxy benzoic acid and(+)-p-alkyloxyphenyl-p-2-methyl-butyloxy-benzoic acid
     手性液晶的研究 Ⅲ.光活性(+)-对-烷氧基苯甲酸-对′-(2-甲基丁氧基)苯酯类和(+)-对-(2-甲基丁氧基)苯甲酸-对′-烷氧基苯酯类液晶的合成和性能
短句来源
     A study of chiral liquid crystals——Ⅳ.Syntheses and properties of optically active (+)-p′-2-methyl-butoxyphenyl p-(p"-alkoxybenzoyloxy)-benzoates
     手性液晶的研究 Ⅳ.光活性(+)-对-(对"-烷氧基苯甲酰氧基)-苯甲酸-对′-(2-甲基丁氧基)-苯酚酯液晶的合成和性能
短句来源
更多       
  相似匹配句对
     Active Packaging Materials
     活性包装材料
短句来源
     Activated Carbon Fibers
     活性碳纤维
短句来源
     Studies on the chemical constituents of the active parts of Mentha spicata L.(Ⅰ)
     留兰香的活性成分(Ⅰ)
短句来源
     Chemical constituents of the active parts of Mentha spicata L.(Ⅱ)
     留兰香的活性成分(Ⅱ)
短句来源
查询“活性(”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  activity
Synthesis and Cytotoxic Activity of 6-(Substituted-Phenyl)Amino-5,8-Quinazolinediones
      
Design, Synthesis and Growth Inhibition Activity of Bis-Epoxyethyl Derivatives of Stallimycin Modified on the Amidino Moiety
      
BIOLOGICAL ACTIVITY AND NEW TRENDS IN THE CHEMISTRY OF ISOQUINOLINE ALKALOIDS
      
Statistically significant correlation (r>amp;gt;0.905) was obtained between the physicochemical parameters and biological activity.
      
These studies may be useful in designing molecules with better cyclooxygenase-2 inhibitory activity.
      
更多          


In this paper a new method has been proposed for computing the potential functions of internal rotations.Applying this method,we have calculated the potential functions of several important molecules,such as 1,2-dichloroethane, 1,1,2-trichloroethane,1,1,2,2-tetrachloroethane,n-butane,2-methyl butane,2,3- dimethyl butane,etc.All the calculated results agree with the experimental data. According to our theory,the potential functions of the three types of molecules CX_2Y-CX_2Y,CXY_2-CXY_2 and CX_2Y-CXY_2 are intimately...

In this paper a new method has been proposed for computing the potential functions of internal rotations.Applying this method,we have calculated the potential functions of several important molecules,such as 1,2-dichloroethane, 1,1,2-trichloroethane,1,1,2,2-tetrachloroethane,n-butane,2-methyl butane,2,3- dimethyl butane,etc.All the calculated results agree with the experimental data. According to our theory,the potential functions of the three types of molecules CX_2Y-CX_2Y,CXY_2-CXY_2 and CX_2Y-CXY_2 are intimately related,if the poten- tial function of the first molecule is written as V_1(φ)=A_1+Bcosφ+Ccos2φ+D_1cos3φ. Then those of the second and the third will be of the following forms: V_2(φ)=A_2+Bcosφ+Ccos2φ+D_2cos3φ V_3(φ)=A_3-Bcosφ-Ccos2φ+D_3cos3φ where D_i~'s(i=1,2,3)can be calculated from the potential barriers of CX_3-CX_3, CY_3-CY_3,CX_3-CY_3 or similar kinds of molecules,while the A_i~'s are not important for actual problems. In this paper we have also discussed the structures of hydrazine,ethyl alco- hol,hydrogen peroxide,and the meso and active forms of the CXYZ-CXYZ type of molecules.Besides,we have pointed out that the potential functions of both the meso and the active forms of the CXYZ-CXYZ type can be calculated from those of the CX_2Y-CX_2Y,CY_2Z-CY_2Z and CZ_2X-CZ_2X types.

本文对分子内旋转问题作了以下的贡献:首先在理论上,提供了一种分子内旋转势函数的新的计算方法。这种新方法不仅理论上来得谨严,避免了以往旧方法中的一些缺点,而且比较简单,应用范围也因此比较广泛。其次,应用这种方法到一些具体问题,得到了下列结果:1.严格的得到了 Pitzer 方程,并估计了它的准确程度。2.证明了 CX_2Y-CX_2Y、CY_2X-CY_2X 和 CX_2Y-CXY_2内旋转势函数间的连系性,设第一种分子的势函数为V_1(φ)=A_1+B cosφ+C cos 2φ+D_1 cos 3φ第二和第三两种分子的势函数分别为V_2(φ)=A_2+B cosφ+C cos 2φ+D_2 cos 3φ和V_3(φ)=A_3-B cosφ-C cos 2φ+D_3 cos 3φ具体讨论了两类很重要的相关的分子:一类是 CH_2Cl—CH_2Cl、CHCl_2—CHCl_2和CHCl_2—CH_2Cl,另一类是 CH_2(CH_3)—CH_2(CH_3)、CH(CH_3)_2—CH(CH_3)_2和CH_2(CH_3)—CH(CH_3)_2。理论上得到的结果和实验全都符合。3.批判了以往一些人建议的乙醇的内旋...

本文对分子内旋转问题作了以下的贡献:首先在理论上,提供了一种分子内旋转势函数的新的计算方法。这种新方法不仅理论上来得谨严,避免了以往旧方法中的一些缺点,而且比较简单,应用范围也因此比较广泛。其次,应用这种方法到一些具体问题,得到了下列结果:1.严格的得到了 Pitzer 方程,并估计了它的准确程度。2.证明了 CX_2Y-CX_2Y、CY_2X-CY_2X 和 CX_2Y-CXY_2内旋转势函数间的连系性,设第一种分子的势函数为V_1(φ)=A_1+B cosφ+C cos 2φ+D_1 cos 3φ第二和第三两种分子的势函数分别为V_2(φ)=A_2+B cosφ+C cos 2φ+D_2 cos 3φ和V_3(φ)=A_3-B cosφ-C cos 2φ+D_3 cos 3φ具体讨论了两类很重要的相关的分子:一类是 CH_2Cl—CH_2Cl、CHCl_2—CHCl_2和CHCl_2—CH_2Cl,另一类是 CH_2(CH_3)—CH_2(CH_3)、CH(CH_3)_2—CH(CH_3)_2和CH_2(CH_3)—CH(CH_3)_2。理论上得到的结果和实验全都符合。3.批判了以往一些人建议的乙醇的内旋转势函数经验式,从理论上提出了乙醇势函数的正确形式,并推断了乙醇的内旋转异构体。4.由内旋转势函数推得过氧化氢的结构,并推得联氨的可能结构,和实验结果相符合。并提供了一种实验方法,来判断联氨分子中的——因此也就是氨分子中的氮原子上独对电子的性格,是 s 还是 sp~3,或者接近于哪一种。 5.讨论了 CXYZ-CXYZ 内旋消式和活性式的内旋转问题,证明了它们的内旋转势函数,和 CX_2Y-CX_2Y、CY_2Z-CY_2Z 以及 CZ_2X-CZ_2X 的密切相关联。知道了后三者的势函数,前者的也就立刻可以计算。同时推测了 CXYZ-CXYZ内旋消式有两种内旋转异构体,活性式有三种,都以对位结构为最稳定。根据我们所讨论的,可以很清楚地看出:Pitzer 和 Crawford 等人所造的计算表已经不够用了。为了使得分子内旋转问题很好的向前发展,需要造一种以V_(φ)=A+B cosφ+C cos 2φ+D cos 3φ为内旋转势函数的计算表。

~~

在不同组成的催化剂(K_2O-Cr_2O_3-Al_2O_3)上进行了庚烷芳烃化反应,研究了催化剂中钾、铬浓度的改变对于芳烃化活性和碳沉积性能的影响.铬浓度增加时,芳烃化活性和碳沉积性能平行增加,两者比值保持不变.催化剂中加入氧化钾后,芳烃化活性显著增加而碳沉积性能则显著降低.因此,氧化钾是铬铝催化剂的一个具有良好选择性的助催化剂.

Although nitriding provides us with an iron catalyst of good durability and resistance to carbon deposition,it brings at the same time a higher methane form- ation during synthesis,this has hindered its application in industry. Accordingly,factors effecting this main side-reaction were thoroughly studied. They are:reaction temperature and pressure,space velocity,particle size of catalyst, alkaline content in catalyst,method of reduction,degree of nitriding,and aging of catalyst.With the exception of space velocity,all...

Although nitriding provides us with an iron catalyst of good durability and resistance to carbon deposition,it brings at the same time a higher methane form- ation during synthesis,this has hindered its application in industry. Accordingly,factors effecting this main side-reaction were thoroughly studied. They are:reaction temperature and pressure,space velocity,particle size of catalyst, alkaline content in catalyst,method of reduction,degree of nitriding,and aging of catalyst.With the exception of space velocity,all of these independent variables play quite important roles iu effecting the yield of methane.The relative impor- tance of these variables are discussed in detail.Among them,the alkaline content and operation pressure are the most influential.With the increase of the alkaline content from 0.8 to 1.7g K_2O/100g Fe (by impregnation),methane formation can be effectively depressed,for example,at 7 atm.and 15 atm.,CO converted to methane is reduced from 7-9% to 5-6% and from 5-7% to 3% respectively.Further- more,the tendency of increase in methane formation with time can also be checked by addition of alkaline. The product distribution has been correlated with methane formation by sum- marizing data reported in literatures and our own results.Presumably methane is essentially formed on some special locations on the catalyst.However,the operation conditions which favor the formation of light hydrocarbons always enhance the for- mation of methane at the same time,so that there appears some parallelism between them. The mechanism of methane formation and the reason for its steady increase in life tests are also discussed.

在已经解决了氮化熔铁催化剂的活性维持问题及原料气体合理利用的基础上,进一步研究了合成时的一个主要副反应——CH_4的生成——与各项操作变数的关系.确定了反应温度、压力、空间流速、催化剂粒度、催化剂的酸含量、还原方法、氮化度及催化剂的存放时间等独立变数对 CH_4生成率的影响,指出应用浸渍法适当增加催化剂的碱含量并采用较高的反应压力(15气压左右)可以抑制 CH_4的生成率到已转化的 CO 的3%左右.以上措施对和缓 CH_4生成随时间增加的趋势也有良好的影响.综合实验结果,论证了 CH_4生成率与产品轻重间的依附关系,并对 CH_4生成的原因及其随合成时间而逐渐增加的现象作了初步理论上的探讨.

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关活性(的内容
在知识搜索中查有关活性(的内容
在数字搜索中查有关活性(的内容
在概念知识元中查有关活性(的内容
在学术趋势中查有关活性(的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社