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
   symmetrical molecule 的翻译结果: 查询用时:0.007秒
图标索引 在分类学科中查询
所有学科
化学
更多类别查询

图标索引 历史查询
 

symmetrical molecule
相关语句
  对称型分子
     The accurate mass and metastable ion detections of symmetrical molecule 2,6—(bisdimethylaminomethyl)—4—ethyl phenol dihydrochloride demonstrated. (1) the respective fragments m/z 176, 191, 192, 193, 161 are formed from molecular ion M~+ on the fragmentation mechanism via various cleavage modes;
     本文对2,6—双(二甲胺甲基)—4—乙基酚二盐酸盐这一对称型分子进行了精确质量和亚稳测定,证实了:(1)由分子离子M~+经过多种裂解方式,分别形成相应碎片m/z 176、191、192、193、161的裂解机理;
短句来源
  相似匹配句对
     Symmetrical Obitals of the Regular Icosahedral Molecule
     正二十面体分子对称性轨道
短句来源
     Isospectral Molecule
     同谱分子
短句来源
     The set of molecule symmetrical operation meets the definition of mathematical group.
     分子的全部对称操作的集合完全符合数学群的定义 .
短句来源
     The molecule is centrosymmetric.
     该化合物分子是中心对称。
短句来源
     2. symmetrical branching;
     2.对称性分支;
短句来源
查询“symmetrical molecule”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。
  symmetrical molecule
Group theory supplies the number and the degeneracies of orbital terms in a symmetrical molecule.
      
The two subsequent dephosphorylations occur on either side of the 5-hydroxyl group to yield I-1,2,3-P3,a symmetrical molecule, as the final product.
      
Note that suramin is a chemically symmetrical molecule containing three sulphonate groups on each of the terminal naphthalene rings.
      


The accurate mass and metastable ion detections of symmetrical molecule 2,6—(bisdimethylaminomethyl)—4—ethyl phenol dihydrochloride demonstrated. (1) the respective fragments m/z 176, 191, 192, 193, 161 are formed from molecular ion M~+ on the fragmentation mechanism via various cleavage modes; (2)the base peak at m/z 191 is formed with the loss of a neutral molecule via the ortho effect; (3) the base peak m/z 191 may further be cleaved to form fragments m/z 147, 132, 91; (4) the cleavage of C--N...

The accurate mass and metastable ion detections of symmetrical molecule 2,6—(bisdimethylaminomethyl)—4—ethyl phenol dihydrochloride demonstrated. (1) the respective fragments m/z 176, 191, 192, 193, 161 are formed from molecular ion M~+ on the fragmentation mechanism via various cleavage modes; (2)the base peak at m/z 191 is formed with the loss of a neutral molecule via the ortho effect; (3) the base peak m/z 191 may further be cleaved to form fragments m/z 147, 132, 91; (4) the cleavage of C--N bond in side chain of amine group attached to benzene ring is simillar to the symmetrical molecules and on the contrary, dissimilar to the asymmetrical molecules in which the C--N bond is stable and does not cleave.

本文对2,6—双(二甲胺甲基)—4—乙基酚二盐酸盐这一对称型分子进行了精确质量和亚稳测定,证实了:(1)由分子离子M~+经过多种裂解方式,分别形成相应碎片m/z 176、191、192、193、161的裂解机理;(2)基峰m/z 191是由M~+通过邻位效应失去HN(CH_3)_2中性分子形成的;(3)基峰m/z 191可进一步裂解,通过多种途径形成m/z 147、132、91相应碎片;(4)苯环侧链胺基中C—N键的开裂与非对称型分子相似,而与脂肪胺中C—N键稳定不开裂的过程截然相反。在对称型分子和非对称型分子裂解机理的基础上,比较了两者邻位效应的差异。

篢he mass spectra (CI)of 2, 6-bis (dimethyl-aminomethy)-4-alkylphe (CnH2n+1,n= 2, 4, 8, 10,12)with multifunctional groups in their symmetrical molecules have beeninterpreted and detected. It is found that all quasimolecular ions peaks(M+H)+are basepeaks, the relative abundance of all (M +H)+peaks from proton transfer have no obvious changes with increasement of alkyl chain(CnH2n+1 )localized C4 before and after subtracting isotopic abundance. The abundance of M+' and (M -H)+ peaks are weak andare not relative...

篢he mass spectra (CI)of 2, 6-bis (dimethyl-aminomethy)-4-alkylphe (CnH2n+1,n= 2, 4, 8, 10,12)with multifunctional groups in their symmetrical molecules have beeninterpreted and detected. It is found that all quasimolecular ions peaks(M+H)+are basepeaks, the relative abundance of all (M +H)+peaks from proton transfer have no obvious changes with increasement of alkyl chain(CnH2n+1 )localized C4 before and after subtracting isotopic abundance. The abundance of M+' and (M -H)+ peaks are weak andare not relative to length variation 完备 some ions such as (M +3H)+ increase with lengtheningalkyl chain (CnH2n+1 ).

本文测定并解析了对称型多官能团分子2,6-二甲胺甲基-4-烷基(CnH2n+1)苯酚〔n=2(Ⅰ)、4(Ⅱ)、8(Ⅲ)、10(Ⅳ)、12(Ⅴ)]同系物的正离子化学电离谱,结果发现,由质子转移反应产生的(M+H)+准分子峰都为基峰[(Ⅰ)~(Ⅴ)],扣除同位素丰度后,随着羟基对位上烷链(CnH2n+1)长短的变化,(M+H)+峰的相对风度仍无明显的变化,M+,(M-H)+峰为较弱丰度且与C4位上烷链(CnH2n+1)的长度变化无关,测得某些多质子离子如(M+3H)+其相对丰度随C4位上的增长而增加.

 
图标索引 相关查询

 


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