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- Long alkyl groups were introduced to the upper rim of calix [4] arenes by Friedel-Crafts reaction of calix [4] arenes and long alkylating agents. 脱叔丁基的杯[4]芳烃与长链的叔醇或者叔氯代烷烃进行傅-克反应,在其上端引入长链烷基。
- Abstract Long alkyl groups were introduced to the upper rim of calyx[4]arenes by Friedel-Crafts reaction of calyx[4]arenes and long alkylating agents. 摘要脱叔丁基的杯[4]芳烃与长链的叔醇或者叔氯代烷烃进行傅-克反应，在其上端引入长链烷基。
- long alkyl group 长链烷基
- Result showed that dialkyl quaternary ammonium salts inhibited the growth of Aeromonas hydrophila and Flexibacter colnmnaris,and the short alkyl group is more effective than the long one. 结果表明,双烷基季铵盐对嗜水气单胞菌和柱状屈桡杆菌生长均具有一定抑制作用,且短链双烷基季铵溴盐比长链的抑菌效果好。
- To add one or more alkyl groups to(a compound. 使烷基化在（一种化合物）中添加一个或多个烷基团
- To add one or more alkyl groups to(a compound). 使烷基化在（一种化合物）中添加一个或多个烷基团
- Then optically pure 1-phenylethylamine groups were connected to the lower rim of the long alkyl calyx[4]arene to afford chiral calix[4]arene. 然后在下端引入光学活性的1-苯基乙胺基团，得到了一系列上端含长链烷基的手性杯[4]芳烃。
- The low-viscosity ILs were rationally designed and synthesized.In addition, serial ILs based on imidazolium with long alkyl chain were synthesized. 通过阴离子交换的方法，得到了以氯离子、溴离子、碘离子、六氟磷酸根和四氟硼酸根等为阴离子的一系列离子液体。
- A process in which an alkyl group is added to or substituted in a compound,as in the reaction of alkenes with alkanes to make high-octane fuels. 烷化作用，烷基取代向一种化合物中添加或用一个烷基团替代的过程，如用烯烃和烷烃发生反应以制得高辛烷值燃料。
- The molecular structure of microcrystalline wax can be regarded as cycloalkanes with 1 or 2 rings and various long alkyl chains. 微晶蜡的平均分子结构可看作是带不同长度与个数的长侧链的含1个或2个环的环烷烃。
- A process in which an alkyl group is added to or substituted in a compound, as in the reaction of alkenes with alkanes to make high - octane fuels. 烷化作用，烷基取代向一种化合物中添加或用一个烷基团替代的过程，如用烯烃和烷烃发生反应以制得高辛烷值燃料
- A process in which an alkyl group is added to or substituted in a compound, as in the reaction of alkenes with alkanes to make high-octane fuels. 烷化作用，烷基取代向一种化合物中添加或用一个烷基团替代的过程，如用烯烃和烷烃发生反应以制得高辛烷值燃料
- N-alkylacrylamide, including DDA, DDMA, HDA, HDMA, is a kind of amphiphiles which have long alkyl chains, and they have the ability of forming stable films. N-烷基丙烯酰胺DDA，DDMA，HDA，HDMA是一类长链两亲性分子，成膜性能较好。
- The results suggest that an increase in alkyl group chain substituted on the cation ring correspond with an increase in toxicity. 结果表明，随着离子液体阳离子咪唑环上烷基取代基的增大，离子液体对酵母细胞的毒性逐渐增大。
- 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。
- New quaternary ammonium salt cationic surfactants with 3 long chain alkyl groups were preparad from 4-alkyldiethylenetriamine and fatty acids through amidation and quaternization. 以个长链烷基二亚乙基三胺和脂肪酸为原料，经酰胺化、季铵化合成了6种未见文献报道的三长链烷基季铵盐型阳离子表面活性剂。
- The conclusion of this experiment income is that the main chain of copolyimides with long alkyl side chain, linear, symmetric and rigid core structures are favorable for generating high pretilt angel. 本实验所得之结论为：线性的、对称的及刚硬的聚醯亚胺主链结构在导入长烷基侧链后会有较稳定的配向性，且长烷基侧链愈长也较有机会得到高预倾角。
- The chiral 2D structures formed at the interface are only observed when fatty acids are present as guest molecules and for quinacridone derivatives substituted with long alkyl chains, -C22H45. 这种手性的二维结构只有在喹吖啶酮衍生物取代有长烷基链(-C22H45)、并与作为客体分子的脂肪酸共吸附情况下才能形成。
- The yields are influenced by the substituents with high yields for phenyl group and low yields for alkyl groups. 反应产率受取代基影响较大,苯基取代时产率较高,烷基取代时产率较低;
- The homologs of benzene are those containing an alkyl group or alkyl groups in place of one or more hydrogen atoms. 苯环上一个或多个氢原子被烷基基团所取代的化合物称为苯的同系物。
