| 释义 |
substituentsCOCA²⁴⁷⁸⁰⁷BNC⁹¹⁵¹⁷⁺⁸
基本例句
n.取代基；代替物；a.取代基的；代替物的原型substituent的三单 At the first step of the synthesis, Materials such as aromatic aldehydes are used to prepare4- R-3- butene-2- ones with different substituents.
反应第一步使用芳香醛等原料制备含有不同取代基的4-取代-3-丁烯-2-酮。 cnki
At the same time, we have also investigated the influence of the electric effect and steric hindrance effect of the substituents to the yields and regioselectivity.
同时，我们还研究了取代基团的电子效应和位阻效应对反应产率和区域选择性的影响。 fabiao
In short, the influence of the substituents is insignificant. However, the remarkable effect was induced by the conjugated structure in the main chain.
取代基的影响较小，主链共轭结构对吸收光谱的影响明显。 opticsjournal
Influences of substituents on the orientation of the azo chromophores were discussed in detail.
讨论了不同的端基对偶氮生色团在自组装膜中初始取向的影响。 cnki
The distilled recoveries of the phenol and aniline with substituents are different with structures under the conditions of neutral distillation.
有取代基的酚类和芳胺在中性蒸馏条件下的回收率，随结构不同回收率不同。 cnki
The effects of substituents on laser characteristics are discussed.
讨论了化合物中取代基效应与激光性能之间的关系。 cnki
The relationship of surface property and hydrophobic branched chain structure was studied using four branched alkylbenzene sulfonates with additional alkyl substituents synthesized by our laboratory.
用自制的四种高纯度多支链烷基苯磺酸钠，研究了支链结构对其表面性质的影响。 cnki
The effects of macrocyclic substituents on the formation and the decomposition of complexes were also discussed.
同时探讨了取代基对配合物生成及酸分解的影响情况。 sioc-journal.cn
The molecular surface areas of29 substituted phenol with7 various substituents were calculated.
计算了带7种不同取代基的29种酚取代衍生物的分子表面积。 dictall
The rules of the influences of substituents to the properties of reagents were studied.
本文还讨论了取代基对试剂性能影响的规律。 cnki
Aromatic and heteroaromatic molecular structures with controllable electron conducting properties are derived from the incorporation of electron active substituents in selective positions.
芳香和可控导电性能电子杂环分子结构是来自电子纳入岗位活跃在选择性取代。 www.1168818.cn
AVAL integrates a database of organic synthetic reactions from which the synthetic approach could be found for the scaffold, provides about100 kinds of various substituents for the R-groups.
该系统配合有机合成数据库，能查询分子骨架合成通式，还自动提供约100种取代基。 cnki
Based on the MS/ MS data of the porphyrin standards, a calculational method is established to identify the peripheral substituents on the porphyrin pyrrole rings.
根据卟啉标样的双质谱特征，建立一种计算卟啉吡咯环上取代基组成的方法。 chemyq
Besides, substituents enhance the diagonal interactions by which the direct interactions are compensated for, and reduce the electronic coupling.
另外，取代基增强了链间对角格点对正对格点的补偿作用，从而使链间耦合减小。 fabiao
Conclusion: The title compounds with cyclopropyl and alky substituents have antifungal activities, and the antifungal activity decreases as the alkyl side chains getting longer.
结论：引入环丙基和烷基侧链的目标化合物都具有抗真菌活性，随着烷基侧链增长，目标化合物的活性降低。 kekenet
Conclusion The QSAR indicates that the antihypertensive duration time of the compounds could be prolonged by enhancement in molecular symmetry or simplification of the molecular substituents.
结论提高整个分子的对称性，或降低分子的取代基的复杂程度，对延长该类药物的降压时间是有利的。 cnki
It follow therefore that the steric blocking effects of substituents are reflected in adverse kinetic, rather than thermodynamic factors.
由此可以看出，取代基的主本阻碍反应，是反映在违背动力学因素而不是热力学因素。 jukuu
It is also showed that substituents could play an important role in the toxic effect of mono- substituted benzene derivatives.
这也说明了对于单取代苯衍生物，取代基在致毒作用中可能起重要作用。 cnki
Synthesis and Characterization of1,3,4- Oxadiazole-based Compounds with Different Substituents.
二芳基取代基-1，3，4-恶二唑类衍生物的合成与表征。 ilib
The different substituents on the aryl ketones determined the different base used in the reactions.
芳基酮上的取代基决定了合成中所用碱的类型。 dictall
The lipophilicity and extraction efficiency of DB21C7 both can be much enhanced by appending alkyl substituents to the benzene rings or reduction the benzene rings to cyclohexanol groups.
如果在 DB21C7的芳环上引入烷基或者将苯环还原为环己基，可增大它的亲脂性，使其萃取效率得到较大的改善。 cnki
The average condensed formula of molecular structure is effective to derive the composition of the peripheral substituents of porphyrins, especially geoporphyrins with identical carbon numbers.
卟啉的平均分子结构简式衡量其取代基的组成，尤其对地质体中相同碳数的卟啉“混合物” 大环外取代基的构成十分有效。 chemyq
The effect of2- alkyl substituents on polymerization activity of monomer, polymer's structures, molecular weight and properties.
研究了2位不同取代基对单体的聚合活性、聚合物的结构。分子量和物理化学性质的影响。 cnki
The symmetry change may be due to the asymmetric disposition of the porphyrin substituents or to electrostatic asymmetry in the protein surroundings.
其对称性的不同与三维结构的不对称排列有关，也可归因于蛋白质环境电学上的不对称性。 cnki
When a dye was introduced by different substituents at the same position of the dye, its photophysical properties can be changed.
在染料的相同位置引入不同的取代基，常会引起染料光物理性质的变化。 chemyq |