位阻效应的英文

• steric effects

• 位:    place; location
• 阻:    block; hinder; impede; obstr ...
• 效应:    effect; action; influence
• 立体位阻效应:    effect of steric hindrance; steric hindrance effect
• 磁电阻效应:    magneto-resistance effect

例句与用法

1. Dense of structure and development of final properties were benefited from retardation of hydration . in contrast , cement hydration process was controlled better by polycarboxylate superplasticizer than the other three superplasticizers owing to its stereoscopic action . and its adaptability to cement was better , by which the cement particles were
   相比之下,聚羧酸盐高效减水剂由于其良好的空间位阻效应,能够使水泥颗粒呈完全分散状态,与其他三种高效减水剂相比可有效控制水泥水化历程,与水泥适应性较好。
2. The membrane properties were found to be dependent upon the content of styrene . the membrane physic - chemical properties compare to nafion 117 except that their chemical stability has to be further improved to make them acceptable for practical use in the proton exchange membrane fuel cell . the proton transport through the membrane follows the " liquid - like " proton conductivity mechanism y and the water balance is important for the working condition of the fuel cell
   对磺化膜的研究分析表明：膜的性能参数如离子交换容量、吸水率、水合系数、形体稳定性、导电性能、化学与热稳定性等依赖于膜中苯乙烯含量，且接枝苯乙烯相互间的位阻效应对膜性能影响很大；膜的性能可与nafion膜相比较；质子在膜中的传导遵循“似液体”质子传导机理；电渗析与扩散作用使膜保持水平衡。

百科释义

位阻效应（也叫空间效应、空间位阻效应、立体效应）是研究分子中不同基团间电子团重叠形成的电磁力而造成的分子结构或反应取向的立体化学分枝。广泛应用于有机化学中分子结构及反应机理的定性讨论，但在有些情况下可能导致偏差或谬误。

其他语言

位阻效应的法语：Effet stérique
位阻效应的日语：立体障害
位阻效应的俄语：Стерический эффект
位阻效应的阿拉伯语：إعاقة فراغية;
位阻效应的印尼文：efek sterik;