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- Theoretically, the solubility and the film-forming character can be improved by introducing an appropriate substituting group to pyrrole in 3-position. 理论上，采用分子设计思想，通过化学方法在吡咯环上引入合适的取代基团可改善聚吡咯及其衍生物材料的溶解和加工性能。
- The thermal stability of film varied with the alternation of substituting groups at the 2-position of benzimidazole. 2位取代基的改变对芳基苯并咪唑-铜配合物的热稳定性有影响。
- Its equation can predict the unmeasured values of electron affinity of substituting groups. 并应用其定量关系式预测尚未实测到的取代基的电子亲合力值;
- The reason is that the electron withdrawing and donating of two substituting groups result in the changes in the density of electron cloud of chemical bonds in ortho position. 这是由于两个取代基的吸或供电子引起了相邻化学键的电子云密度发生变化,使旋光度相应变化,从而导致旋光性。
- In textbooks of organic chemistry.the orientation rule of substituting groups in benzene ring is often explained with electronic effect (inductive effect and conjugative effect). 有机化学教材中通常是从电子效应(诱导和共轭)来解释苯环上取代基的定位规律。
- SQL Server does not support adding members to an existing substitution group in an XML schema collection. SQL Server不支持将成员添加到XML架构集合中的现有替换组。
- We observe photophysical and electrochemistry property of biphenyl imide by substitutent group effect. 藉由取代基效应观察化合物光物理性质及电化学特性的改变。
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- He broke away from that lawless group years ago. 他在几年前脱离了那个非法团体。
- Keywords CMC;distribution of substituting group;i-propanol;anhydroglucose unit; 羧甲基纤维素;取代基分布;异丙醇;葡萄糖单元;
- The group of barbaric soldiers killed many people. 那群野蛮的士兵杀了很多人。
- The group was made up of doctors. 这个团体是由医生组成的。
- The substituted group on the bipyridyl ligand in complex 2 could lose C_2H_4 neutral molecule under a higher CID fragmentation (such as CID 110 V), and its single charge ion is more stable than its double charge ion. 而络合物2在较高的CID电压下(110V)会发生联吡啶环上取代基的中性C2H4小分子丢失;其单电荷离子比二价电荷离子稳定.
- A group of boys dashed out of the classroom. 一群男孩子从教室里冲出来。
- I come upon a group of children play in the street. 我遇到一群孩子在街上玩耍。
- He goes about with a group of nice boys. 他经常和一群好孩子在一起玩。
- He is a the most brisk young man in this group. 他是这个小组中最活跃的年轻人。
- He showed me a photo of a family group. 他给我看一张合家欢的照片。
- The chief accountant of a manufacturing group. 一个制造业集团的总会计师。
- The hunting group had good sport today. 今天打猎小组满载而归。
