取代基

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 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 .

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

B环取代基对黄酮类化合物缩合、关环的影响

The Substituting Groups of B Ring Affecting the Condensation and Closing Ring

取代基型钌配合物电子结构及与DNA键合倾向研究

The Study on the Electronic Structures and Trend in DNA-binding of Substituted Ruthenium Complexes

氰类和酯类取代基水溶金属卟啉与DNA相互作用的共振拉曼研究

The Interaction of Water-soluble Quaternary Ammonium Pyridine Porphyrins with DNA Studied by Resonance Raman Spectroscopy

介绍了对化学取代基（R基团）进行相似性比较的工作。

This work is mainly concerned with the comparison of the similarities of the R-groups .

高性能H·E-聚阴离子纤维素的研究&取代基沿大分子链的分布

Study on high performance H. e-polyanionic cellulose & the distribution of substituent along macromolecular chain by enzymatic degradation

芳环上96种常用取代基的Q型聚类分析法

Q-model cluster analysis of 96 common aromatic substituents

饱和脂肪族羰基化合物的n→π吸收峯位移与取代基常数间的定量关系

A quantitative relationship between the shift in the n →π ~ absorption maxima and the substituent constants in saturated aliphatic carbonyl compounds

模型结果显示：吲哚环1号N原子上立体效应强的取代基有利于亲和力的提高；

The models obtained also shows that the substituents on nitrogen atom of the 1-position of the indole ring have more relative binding affinities .

合成了一种新型取代基咪唑啉化合物IM，经复配后得到新型咪唑啉缓蚀剂IMC。

A new imidazoline inhibitor IM is synthesized and complexed into inhibitor IMC .

研究了不同取代基对偶氮染料吸收光谱的影响，考察了光照条件下该类偶氮染料在DMF稀溶液中吸收光谱的变化特征。

The visible absorption of the dyes in DMF were investigated .

研究表明配位键的强度不仅受取代基R的影响，而且还与环结构的变化有关。

The strength of the dative bond deponds not only on the substituents R , but also on the skeletal structure of the parent ring .

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。

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

探讨了取代基对13cNMR化学位移的影响。

The effect of substituent on ~ ( 13 ) C NMR was discussed .

考察了取代基R和冠醚环配合的钾离子对二氧加合物形成及稳定性的影响。

The influence of the substituted groups R in ligands and potassium ion in the crown ring on formation and stability of dioxygen adducts was investigated .

2-（2,4-二氟苯基）-3-（N甲基-N-取代基酰胺基）-1-（1H-1,2,4-三唑-1-基）-2-丙醇类化合物的合成及抗真菌活性的研究

Synthesis and antifungal activities of 2 ( 2,4 difluorophenyl ) 3 ( n methyl n substituted acylamino ) 1 ( 1h 1,2,4 triazol 1 yl ) 2 propanol

产物的颜色、分解温度、IR及~1HNMR亦与取代基有一定关系。

And the colour , decomposition temperature , IR and 1H NMR of the products have a certain relation to their substituent .

研究结果表明，金属卟啉的外围取代基苯基与卟啉环的键合能力按Mn、Fe和Co的次序变弱。

The experimental result indicated that the bonding power between substitutional phenyl and porphyrin cycle in metalloporphyrins became weak from Mn , Fe to Co.

取代基对系列有机锡单体与MMA共聚活性的影响

Effect of the different substituent on polymerization activity of a series of organotin monomers

以σ（△E）~（HO）度量取代基电子效应强度的定量判据

σ _ (△ E ) ~ ( HO ) as a Quantitative Criterion of the Measurement of the Electronic Effect of Substituents

苯环上取代基的Hammettσ常数和立体参数（MR）可以明显改进相关关系。

Hammett σ constants and steric parameter ( MR ) of the substituents can significantly improve the correlations .

VO（pa）2配合物及py上取代基效应的DFT研究

The DFT Study of VO ( pa ) _2 Complex and Substituent Effect on py

不同取代基巯基偶氮苯甲酸TiO2光催化降解的密度泛函理论研究

Density Functional Theory Study on the Photocatalytic Degradation of Mercapto-Azobenzene Carboxylic Acids with Different Substituents Catalyzed by TiO_2

结果表明：不同中心金属和不同数目的羧基取代基对结合常数K的影响不大；

The results indicated that there was no much differences among the different metal ions and number of carboxylic substituents for the binding constant of carboxylic phthalocyanine with BSA .

稀土和双有机取代基TGS晶体生长和性能研究

Study on property and growth of rare earth with two organic-dopant TGS

颜料颜色的深浅和λmax与苯环上取代基的性质、位置密切相关。

In additional , the pigment 's color and λ max is related to the properties and position of substituting group on benzene ring .

取代基对蒽醌的羰基与Eu（fod）3核磁位移试剂配位能力的影响

The Effect of Substituents on the Complexation Activity Between the Carbonyl of Anthraquinone and Eu ( fod ) _3

取代基物化参数用于HEPT类HIV-1逆转录酶抑制剂的QSAR研究

QSAR Studies of HEPT Derivatives as HIV-1 Reverse Transcriptase Inhibitors Using Physicochemical Parameters of Substituents

取代基作用对化合物紫外吸收能量的影响规律是QSPR研究中的重要内容。

Substituent effect on UV absorption energy of compounds is an interesting field of QSPR researches .