para position
英 [ˈpærə pəˈzɪʃn]
美 [ˈpærə pəˈzɪʃn]
对位
双语例句
- Substituted acetophenones at the para or meta position of aromatic ring gave α-bromoacetophenones in high yield.
对位和间位取代的苯乙酮获得了高的产率； - Azobenzol units are attached to PAA side chain, and different groups were selectively introduced to the para position of azobenzol units in order to investigate the electronic effects on fluorescent properties and the third-order NLO properties.
通过测定各个接枝聚合物的荧光性能和三阶非线性光学性能考察了侧链末端取代基的电子效应对聚合物荧光性能及其三阶非线性光学性能的影响。 - The bond breaking processes occurred mainly at the ethylene glycol residue of the trans configuration, C& O bond of ester and at the para position of benzene rings.
断键主要发生在乙二醇残留物、苯环的对位和酯的C&O键上。 - The experiment results demonstrated that the quinoxalone derivatives could selectively recognize Cu~ ( 2+), and the Ks of the sulfonamide unit in the meta position of phenyl ring is 100 times than that in the para position.
实验结果表明它们能选择性识别Cu~（2+），并且磺酰胺单元处于芳基的间位时，其配位常数Ks值比其处于对位时大100倍左右。 - Some Criterions of the Electrophilic Substitution Reactivity at the Ortho, Para and Meta Position of the Mono-substituted Benzenes
一元取代苯邻、间、对位亲电取代反应活性的几种判据 - Study on process for para-position nitration of phenethanol
β-苯乙醇对位硝化工艺研究 - In the catalyst systems bearing mono ( imino) pyridine ligand, it seems that the substitute attached to the ortho position of phenyl ring has a beneficial influence on the activity while substitute group in the para position has a negative effect.
此外，在含有单亚胺吡啶配体的催化剂体系中，亚胺基苯环上邻位取代基对于催化活性有利，对位取代基则会抑制催化剂活性。 - Amino-group is play a part of auxiliary forming para, ortho or meta position structure mainly;
氨基官能团主要起到与其它活性官能团形成对位、邻位或间位结构的辅助作用； - Study on Para Position Allocation Technology of Vegetation in the Loess Plateau
黄土高原植被对位配置技术研究 - Methods: Using N-phenyl guanidine as a basic structure, a series of guanidine derivatives were obtained by introducing benzothiazole-2-mercapto at the para position of phenyl group, and alkyl, cycloalkyl, aralkyl at the N atom of guanido, and their NOS inhibiting activities were evaluated.
方法：以N-苯基胍为母核，在苯基对位引入苯并噻唑-2-巯基，胍中其他氮上分别引入烷基、环烷基、芳烷基等，并测定这些胍类化合物的NOS抑制活性。 - The polymerization of phenols monomer occurred in ortho and para position of phenolic hydroxy.
酚类单体在苯环上羟基的邻位和对位发生了聚合反应。