Substituent group

The stability of molecular ion , the mode of formation of the base peak and the number of fragment ions depend mainly upon the property of substituent group .

结果表明，分子离子的稳定性、基峰的生成方式以及碎片离子的多少主要取决于取代基R的性质。

The experimental results show ; under special substituent group and DS , two cellulosic derivatives ( HPC , HEC ) got better thermoplastic and hydrogels property .

实验结果表明：HPC和HEC在特定的取代基和DS条件下，均能获得良好的热塑性和水凝胶性，其中，HPC在取代基C6H5NCO，DS为0.120.21；

The results showed that substituent group has effect on polymerization of the six-membered cyclic carbonates .

实验结果表明，取代基对环状单体的开环聚合反应有一定影响。

This clearly demonstrates the influence of tho large substituent group on the N atom of piperidine ring .

这充分显示了分子中N原子上带有较大基团的影响。

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。

P Orbital in Substituent Group Assists N_2O_4-O_3 Nitration Aromatics in Substituting Ortho

N2O4-O3硝化取代芳烃时取代基上的P轨道的邻位协助作用

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。

XRD patterns showed that the N-phthaloyl-chitosan oligosaccharide can crystallize though there is a bulky substituent group hung from it .

XRD也表明，尽管壳寡糖链上悬挂很大的取代基，但N-邻苯二甲酰化壳寡糖却具有结晶性。

Some influential factors ( such as difference pressure , testing temperature , substituent group , vulcanizing time , liquid crystal content , mechanics property ) on permeability and permselectivity for the crosslinked membranes were studied .

研究了各种因素（压差、温度、取代基、交联时间、液晶含量、物理性能等）对交联膜的透气性能和分离性能的影响。

The reaction process and result were effected by the character of the substituent group in phenyl ring in the synthesis process of IBX derivatives . So the effect factor should be considered in choosing the raw materials .

在IBX衍生物的合成中，苯环上所带取代基的性质对反应进程和结果均有影响，选择原料时需予以考虑。

It has also been found that , the polymerization rate of cyclic phosphoester monomer is highly depended on the structure of pendant side group and the ring substituent group when using stannous octoate as the catalyst .

研究还发现，以异辛酸亚锡为催化剂的磷酸酯单体的聚合速率与磷酸酯单体的侧基、环取代基密切相关，而且可以方便利用聚磷酸酯侧基对高分子进行功能化修饰。

Substituent group have little effect on hydrogens of A and C ring . The chemical shift of para - carbon increases as substituent group s ' supplying electron to benzene ( except for IE and 2E ) increases .

与取代基相连碳的邻位、对位上的氢的化学位移随取代基的增大而增大（1E和2E除外），C环和A环上的氢受取代基的影响不明显；

Seven aromatic substituted imidazole derivatives have been synthesized in this paper . Luminescent of polycrystal pellet was studied , influences of substituent group and conjugated degree upon the fluorescence excitation , emission spectrum and stokes shift were researched .

合成了7种芳基取代咪唑衍生物，研究了它们多晶粉末的发光，对其发光机理进行了探讨，分析了取代基和共轭程度对激光光谱、发射光谱及Stokes位移的影响。

The degree of branch structure is related to the ion-pair , which is the substituent group connected to N atom in alkyne , and the steric effect of the Lewis Base . The branch structure can be restrained by controlling the chain transfer reaction .

其支化程度与离子对的结构，即炔酰胺上N原子相连取代基和路易斯碱的位阻大小有关，可通过对链转移反应的抑制控制支化程度。

It shows that the carbon aromaticity of vitrinite . semivitrinite and inertinite is 0.84 , 0.91 and 0.93 respectively . The aliphatic substituent group and chelate quinonyl contents in the molecular structural unit of vitrinite are higher than that of semivitrinite and inertinite .

结果表明：镜质组、半镜质组和惰质组的芳碳率分别为0.84、0.91和0.93，镜质组分子结构单元中含有较多的脂肪取代基和螯形醌基；