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- electrophilic substituent 亲电子取代基
- FRAM is considered as the substituent of asynchronous SRAM to taste commonly. FRAM一般被认为是异步SRAM的代替品。
- The new thing substituent to old thing, certainly will wants to cause.. 新事物对旧事物的取代，势必要引起...
- It is very difficult to sulfonate PES by electrophilic aromatic substitution reaction. 同时通过改变氯磺酸与聚醚砜的摩尔比,可以对反应进行控制。
- Markovnikov's rule is an important rule of product forecasting in alkene electrophilic addition reaction. 马氏规则是在烯烃的亲电加成反应中预测产物的重要经验规则,然而它通常的表述有一定的局限性。
- The substituent effects of ethoxy groupswere studied on the chemical composition and properties of plasma polymers. 研究了乙氧取代基对聚合物化学组成和性能的影响。
- Synthesis of the substance from aniline and hexafluoroacetone involves electrophilic addition,acylation and reduction. 其合成一般是以苯胺和六氟丙酮为起始原料,经过亲电加成、酰化和还原三步反应。
- The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer. 作者认为影响聚合物等规度的因素主要是取代基的极性效应。
- Electrophilic aromatic substitution takes place at C5 requiring Activating groups. 在有活化基的情况下可以在C5发生亲电芳香取代反应。
- The substituent of methyl has different electrical effects in organic solvent with various polarities. 甲基在不同极性的溶剂中表现不同的电子效应；
- It will become deepen to the students' recognization in mechanism of Aryl electrophilic substitution. 这些问题的讨论将深化学生对芳烃亲电取代反应机理的认识。
- The chromogenic responding ability increases as the substituent changes from phenyl to naphthyl or anthryl. 实验结果表明，偶氮基团的引入改善了8-羟基喹啉的生色能力，并且在乙腈溶液中随着取代基由苯基变为萘基和蒽基时，化合物的吸收光谱发生红移。
- The rate constants of radical and electrophilic addition to alkenes are dominated by different factors. 烯烃的自由基加成和亲电加成速率受不同的因素控制。
- The aromatic electrophilic substitution reaction was studied using NMR for the first time. 首次采用NMR研究芳基亲电取代反应。
- The results showed that chloric substituent in polymer chains prevented the chains from further chlorination. 结果表明,大分子链上的氯取代基对分子链进一步氯化起阻碍作用;
- And it is the substituent of the traditional method of the formaldehyde Vaporising sterilization. 方法:采用枯草芽孢杆菌作生物指示剂,进行细菌挑战性试验。
- The fluorescence intensity of porphyrin also relates to the substituent positions on the phenyl groups. 此外，荧光强度还与卟啉的苯环上取代基的取代位置有关。
- From the 1H，13C NMR ,we could verdict the stucture of the substituent of Cage-like silsesquioxane . 实验过程中，首先利用1H NMR、13C NMR确认了笼上硅原子取代基的结构；
- Benzene undergoes metabolic oxidation by cytochrome P450 enzymes to form an electrophilic epoxide which can alkylate protein and DNA. 苯在细胞色素P450酶氧化代谢下，形成一种能烷化蛋白质和DNA的电环氧化物。
- But when adding hydroxyl substituent to the C5 on A ring , it has a greater influence on the compound than on B ring . 而A环C5上取代羟基的加入对整个体系的荧光光谱影响比B环要显著得多。
