英:[sʌb'stɪtʃʊənt]
美:[sʌb'stɪtʃʊrnt]
英:[sʌb'stɪtʃʊənt]
美:[sʌb'stɪtʃʊrnt]
n.
取代
adj.
取代的
取代物:尤指化合物中取代另一个基、原子或基团的
取代基的,置换基的
Latin substituent-, substituens, present participle of substituere
The first known use of substituent was circa 1896
substituentnoun
an atom or group that replaces another atom or group in a molecule
1 This invention relates to a preparation method of substituent glutaric acid anhydride.
本发明涉及取代基戊二酸酐的制备方法。
2 The substituent is deuterium.
取代基是重氢.
3 The results show that the formation of dimers depends on the nature of substituent group, dielectric constant of solvent, and concentration.
结果表明二聚体的形成取决于取代基团的性质以及溶剂的介电常数与溶液浓度。
4 The substituent effect was discussed.
并对取代基效应作了解释。
5 A liquid crystalline epoxy monomer with long lateral substituent was cured with anhydride and the cure kinetics was investigated by non-isothermal DSC technique.
采用非等温差示扫描量热法(dsc)研究了一种长侧链取代液晶环氧单体与甲基六氢苯酐的固化反应历程,考察了体系的固化反应动力学特征。
6 The healthy soy sauce was produced with mixed strain fermentation through using oat and residual biomass of beer substituent for soybean powder.
对以燕麦和啤酒废弃生物质替代部分豆粕为原料,利用混合菌种发酵酿造保健酱油进行了研究。
7 Property dependence of ABA triblock copolymers on the terminal substituent of azobenzene was investigated.
研究了偶氮苯端基取代基时ABA三嵌段共聚物性能的影响.
8 The electronic structures of polyindenoindenes (PInIn) and their derivatives have been studied by self - consistent - field crystal orbital method. The substituent effect is also discussed.
用自洽场全略微分晶体轨道法对聚茚并茚及其取代衍生物的电子结构进行了计算研究,探讨了取代基效应。
9 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。
10 The effect of the substituent number and position on second order nonlinear - optical coefficients � � was studied.
研究了取代基数目及取代基位置对非线性光学效应的影响.
11 The product is high in degree of substitution, whose substituent distribute equally, has characteristics of high viscosity, high content of sodium, high acid-viscosity ratio.
该产品的取代度高,取代基分布均匀,具有高粘度、高钠含量、高酸粘比、高盐粘比的特点。
12 It was found that the substituent attached at the phenyl exerted influence on the yields of synthesis, on the experimental conditions of sulphonation and on the acid-base properties of the reagent.
研究表明,芳醛上取代基不同对卟啉的合成、磺化和试剂的离解平衡等有一定的影响。
13 In this paper, the correlations of the formation of dimers with solvent polarity, concentration, nature of substituent group and central metal were investigated.
本文探讨了有关二聚体的形成与溶剂极性、溶液浓度、取代基团性质及络合金属原子的关系。
14 These results indicated that a suitable substituent at the 2-position of pyridine ring and a well-fit group at the 3-position of acrylate were both essential for hi.
生测结果表明在吡啶环的2位合适的取代基和丙烯酸酯的3位取代基的体积对除草活性至关重要。
15 The experiments show that large substituent group on Cp is favorable to the formation of CTSs with low ratio of ferrocenyl:POM.
比较发现,茂环上的取代基越大越有利于二茂铁基阳离子与多阴离子之比小的电荷转移盐的形成。
16 Positive charges and substituent size in TPM dyes may be two important factors in influencing the binding stability of the dyes and G-quadruplexes.
此外,还发现TPM染料所带的正电荷数以及取代基的体积是影响染料和G-四链体结合稳定性的两个重要因素。
17 Also , the substituent species and the position on phenyl ring effects the reaction.
苯环上取代基的种类及位置对反应也有影响.
18 The absorption, emission maximum and the fluorescence lifetime changed as the Hammett substituent constant in folding linear.
最大吸收、最大发射、及荧光寿命与取代基的哈密顿取代基常数呈折线关系。
19 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。
20 Results We obtained the epoxidation products of phenyl epoxy ethane. That with substituent on the benzene ring has higher yield, and that the substituent at 5-have higher yield than at 3 -.
结果产物中有环氧化产物苯基环氧乙烷,催化剂苯环上有取代基的环氧化物产量高,取代基在5-位上的比在3 -位上的环氧化物产量高。