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.
例句与用法
1.
The substituent is deuterium . 取代基是重氢。
2.
Process on the synthesis of substituent aryl boronic acid compounds 取代芳环硼酸化合物的合成进展
3.
Structural property of n - substituent perfluoropolyalkyl - etherphenylarnide molecular 取代全氟聚醚芳酰胺的分子结构特性
4.
New type of liquid crystals such as laterally fluorinated naphthalene indane , axially fluorinated cyclohexane and liquid crystal containing highly fluorinated substituent , which with high negative dielectric anisotropy low viscosity and high clearing point were emphasized 重点介绍了近年来开发出的一些具有大的介电各向异性、低黏度、高清亮点的新型液晶，如侧向氟取代萘环、茚环类，轴向氟代环己烷类，含多氟取代类液晶等。
5.
Based on the generalized variational principle of the modificatory variables and substituent shearing strain field interpolation of the bending theory of the mindilin plate , this paper brings up the nine - node mixed plate bending element and adopts the sap2000 ? a large - scale finite element analysis programs . by the examples , we find the precision of the method is satisfying 在对转换层厚板进行局部有限元分析时，本文提出了基于mindlin中厚板弯曲理论的修正的二类变量广义变分原理和替代剪应变场插值方法的九节点厚薄板通用的板弯曲单元，并采用了sap2000有限元程序。
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