alkyl group

Conclusion Introducing the methyl group or a low alkyl group resulting in the high selectivity and increase of its activity .

结论甲基或低级烷基的引入导致了高选择性，使其活性增大。

Three new β - cyclodextrin derivatives with long alkyl group were synthesized .

合成了3种新的含长烷基链的β－环糊精衍生物手性固定相。

( 13 ) ~ C-NMR Spectra and Electron Effect of Alkyl Group

~（13）C&NMR谱与烷基的电效应

Electronic effect of alkyl group in hydrocarbons

烷基在烃类分子中的电子效应

Remarking again on electronic effects of an alkyl group

烷基电子效应的再认识

Influence in alkyl group of alkyl chloroacetate on the catalytic activity was also discussed .

探讨了氯乙酸烷基酯中烷基对反应活性的影响。

On the other had the chain length of alkyl group also affects on the values of AT as well .

同时还发现吸附质的链长对脱附性质、AT值也有较大影响。

The Hydrophobic Index of Alkyl Group

烷基的憎水指数

Their extraction ability markedly decreases with the increase of the steric hindrance from ester alkyl group .

萃取能力随着酯烷基空间位阻的增大而显著降低。

The Relationship Between the Bridging Alkyl Group and Electrochemical Behavior of Some Biferrocenyl Alkanes

烷基桥联双二茂铁衍生物的取代基效应与电化学性质的研究

If the alkyl group length was larger than 11C , the self-assembled film would induce vertical alignment .

实验发现，当自组装膜烷烃碳链长度大于11个C原子就可获得垂直取向。

Synthesis of methyl pyropheophorbide - α substituted at 3-position by alkyl group

3-烷基取代的焦脱镁叶绿酸-α甲酯衍生物的合成

Second , the chain size of the alkyl group in the imidazoline molecule influences the result of the rate of corrosion inhibition .

眯哇琳环2－位上的烷基大小对缓蚀剂的缓蚀率有较大的影响。

The homologs of benzene are those containing an alkyl group or alkyl groups in place of one or more hydrogen atoms .

苯的同系物是指是那些以一个烷基或多个烷基取代苯的一个或多个氢原子的物质。

Synthesis of Methyl Pyropheophorbide-a Substituted with Mono ( di ) - long Chain Alkyl Group at 3-Position

3-位长链烷基双（单）取代焦脱镁叶绿酸-a甲酯的合成

The achievements of her research in acid dyes with high carbon alkyl group , reactive dyes , reactive disperse dyes and silk dyes were mainly reviewed .

在研究领域中着重介绍她在含长碳链烷基酸性染料、活性染料、活性分散染料及丝绸染料方面的成就。

The characteristic rules of rates of mass to charge for base peak about 2 - ( alkyl group ) thiophene and 2,5 - ( two alkyl groups ) thiophene

2-烷基噻吩和2,5-（二烷基）噻吩质谱基峰质荷比的特征规律

The full scan MS 4 spectra gave characteristic fragment ions formed by loss of the alkyl group on the alkoxy substituent on the phenyl ring as alkyl radical .

其（-）ESI-MS4质谱均产生脱去苯环上烷氧基的烷基自由基碎片。

The results showed that these organo-antimony compounds possessed good extreme pressure property and good load carrying capacity , however , their abilities were weakened with increase of the molecular weight of alkyl group .

梯姆肯和四球试验结果表明，有机锑化合物具有良好的极压性能和承载能力，但随着烷基相对分子质量的增大，性能逐渐减弱。

And some racemic α - and β - amino acids , α - and β - hydroxy acids and amines with asymmetric alkyl group wore resolved .

并对外消旋的α-、β-氨基酸，外消旋的α-、β-羟基酸和含手性烃基的外消旋胺进行了拆分。

Sol-gel method was used for the fabrication of open tubular columns with mixed alkyl group ( C 8-C 13 ) stationary phase for capillary electrochromatography . Following the column preparation , the electroosmotic flow behavior and the electrochromatography performance were investigated .

利用溶胶-凝胶（Sol-gel）技术制备了混合烷基开管毛细管电色谱柱（C8-C13OT-CEC），并考察了其电渗流行为和电色谱性能。

Systematic study on the separation of monoalkyl - and dialkyl phosphoric acids with C_1 & C_8 carbon atoms in the ester alkyl group by paper chromatography and paper electrophoresis has been made for the purpose of studying the relationship between chemical structure and physical properties .

纸电泳适宜于分离同一类型而碳原子数不同的烷基磷酸，其泳动值随碳原子数之增大而变小。和纸层析相反，一烷基磷酸的泳动值大于二烷基磷酸。

The relationship of gas phase proton affinity ( PA ) of aliphatic amines , alcohols and ethers , inductive effect index ( I ) of alkyl group , atomic charge ( q x ), electronegativity of element ( X N ) of affinity atom in RX molecules was studied .

用烷基诱导效应指数I和RX分子中质子亲合原子X所带电荷qx及元素电负性XN与脂肪胺、醇、醚的气相质子亲合能PA进行关联。

The synthesis and drug release property of polysiloxane bearing pendant long alkyl ether group

侧链为长链烷基醚的聚硅氧烷的合成及其药物控制释放性能的研究

Three of these dyes with alkyl secondary amino group at the central position were found to exhibit a large Stokes shift ( > 140 nm ) and strong fluorescence .

其中，中位烷基氨基取代的三个衍生染料在水溶液中的斯托克斯位移大于140nm，并且荧光强度比普通菁染料强两倍以上。

Long chain alkyl benzenes is the product of cyclization-decarboxylation-aromatization of fatty acid , with the help of clay minerals catalytic effect , which comes from bacteria , seaseed and higher plant lipid ; or the reaction product of Monocylic aromatics and fatty acid alkyl group under the same conditions .

长链烷基苯主要是细菌、藻类和高等植物类脂化合物中脂肪酸在粘土矿物催化下发生环化脱羧再芳构化或单环芳烃与脂肪酸烷基化反应形成的产物。