substituent怎么读

英式音标：[sʌb\'stɪtʃʊənt]

美式音标：[sʌb\'stɪtʃʊrnt]

substituent的意思释义

n.

取代；

adj.

取代的；

英英释义

In organic chemistry and biochemistry, a substituent is an atom or group of atoms substituted in place of a hydrogen atom on the parent chain of a hydrocarbon. The terms substituent, side-chain, group, branch, or pendant group are used almost interchangeably to describe branches from a parent structure, though certain distinctions are made in the context of polymer chemistry.

substituent用法及例句

双语例句

用作名词(n.)

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。

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。

例句参考

Substituent constants for correlation analysis in chemistry and biology

A New Substituent Constant, π, Derived from Partition Coefficients

Aromatic substituent constants for structure-activity correlations

Field and resonance components of substituent effects

The relationship between proton-proton NMR coupling constants and substituent electronegativities—I : An empirical generalization o...

Relationship between proton–proton nmr coupling constants and substituent electronegativities. III. Conformational analysis of...

Relationship between proton–proton nmr coupling constants and substituent electronegativities. III. Conformational analysis of...

The relationship between proton–proton NMR coupling constants and substituent electronegativities. II—conformational analysis of t...

Predicting the activity of phenolic antioxidants: theoretical method, analysis of substituent effects, and application to major fami...

substituent相关例句

1. 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。

5. 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。

6. 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。

7. These clusters show different fluxional behaviour and ligands according to various substituent around the metals of osmium.

根据羰基配体取代基的不同，该类簇合物中小分子的移动种类及方式也有所不同。

8. The substituent effect was discussed.

并对取代基效应作了解释。

9. Standard formation enthalpies of substituted benzene and benzoic acids derivates are related to the primary effect, secondary effect and the barrier point of the substituent.

基于取代苯和取代苯甲酸衍生物的标准生成焓受取代基的初级效应、次级效应及取代基之间的障碍点等因素影响。

10. 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。

11. The size and steric hindrance of substituent of porphyrin is one of the crucial factors to affect the interaction between porphyrins and DNA.

吡啶取代基的大小和空间位阻是影响相互作用方式的关键因素之一。

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 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；

16. The effective laws of the substituent rates of recycled aggregate, stress level and slag on creep degree of the recycled concrete(RC) were researched.

通过试验，研究了再生骨料取代率、应力水平及矿渣掺和料对再生混凝土徐变度的影响规律。

17. The absorption, emission maximum and the fluorescence lifetime changed as the Hammett substituent constant in folding linear.

较大吸收、较大发射、及荧光寿命与取代基的哈密顿取代基常数呈折线关系。

18. The different effects of nitro and chlorine substituent groups on the phenols degradation were also discussed in this paper.

酚类化合物苯环上的硝基和氯取代基也是影响氧化速度的主要因素。

19. Results showed that this kind of compounds has excellent photobleaching property. The bleaching effect of phthalocyanines containing halogen substituent is better than the one that is not substituted.

结果表明该类化合物具有很好的光学漂白性，含卤素取代酞菁的漂白效果明显好于不含卤素酞菁的效果。

20. When the substituent at the benzene ring and the N atom of aniline, the HDAC inhibition activity is different from that of SAHA.

阳性对照药SAHA结构中的苯环取代和苯胺上的氮取代，使HDAC抑制活性降低。

21. To the best of our knowledge, this is the first example of substituent tuned magnetic transform.

据我们所知，这是取代基调节磁性转变的第一个例子。

22. 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。

23. 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。

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24. Results show that they have good mechanical and mining properties with low cost. It is a good substituent of YG9Cand YG11C grade cemented carbide mining bits.

结果表明它有较好的机械性能和凿岩性能，且成本较低，可以替代传统的YG9C和YG11C牌号硬质合金钎片。

25. 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。

ip.com

26. 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。

www.fabiao.net

27. 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。

www.fabiao.net

28.\"Fatty acids are carboxylic acids with a long hydrocarbon chain, usually straight, as the fourth substituent group on the carboxyl (-COOH) group (see functional group) that makes the molecule an acid.\"

脂肪酸一般由一条偶数碳原子的直链组成,整个长链上及其一端都有氢原子,另一端有一个羧基(-COOH),所以是一种羧酸。

32.eletronegative substituent

电负性取代基

33.negative substituent

阴性取代基

34.cyclic substituent

环式取代基

35.substituent stabilization operator

替换稳定化算符

36.eletrophilic substituent

亲电子取代基

37.The linear relationship between the gas phase standard enthalpies of formation and the substituent constants is discussed.

讨论了气态摩尔标准生成焓与取代基常数间的线性关系。

-- 来源 -- dict.cnki.net