In the end, the steric hindrance of the acetyl group was discussed.
最后，本文讨论了空间位阻效应对反应性质的影响。
The stereoselectivity was improved by increasing steric hindrance of the reactions.
通过增加反应的空间位阻改进了反应的立体选择性。
Nevertheless, steric hindrance caused by chemical structure reduces the retention time.
药品化学结构引起之立体障碍会降低滞留时间。
Based on this, the selectivity and steric hindrance for the adsorption of bile acids are discussed.
对树脂吸附胆酸过程中的选择性和位阻作了讨论。
It was considered that steric hindrance and electrostatic repulsion were the main stabilizing mechanism.
空间位阻和静电排斥是其乳状液稳定的主要机理。
This approach covers the substrate range of aliphatic, aromatic, heterocyclic and steric hindrance ketones.
该催化剂适用于各种脂肪酮、芳香酮、杂环酮和位阻酮。
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 large steric hindrance group avails to the enantioselectivity, but too much steric hindrance reduces the activity.
大位阻取代基有利于提高对映选择性，但位阻过大降低催化活性。
The size and steric hindrance of substituent of porphyrin is one of the crucial factors to affect the interaction between porphyrins and DNA.
吡啶取代基的大小和空间位阻是影响相互作用方式的关键因素之一。
The dependence of chain scission and racemization on temperature results from molecular motion, "cage effect" and steric hindrance during recombination.
分子量降低和消旋作用对温度的依赖性，是由于分子运动和笼罩效应以及重合的空间位阻效应所致。
The dispersing ability of SSHE as cement dispersant also came from steric hindrance effect and long side chain contributed to steric hindrance in a certain degree.
淀粉丁二酸单酯用作水泥分散剂时，其分散机理也主要来自空间位阻作用，且较长的极性侧链对空间位阻效应具有一定的贡献。
At the same time, we have also investigated the influence of the electric effect and steric hindrance effect of the substituents to the yields and regioselectivity.
同时，我们还研究了取代基团的电子效应和位阻效应对反应产率和区域选择性的影响。
These could be related to the difference in solubility of KGM, viscosity of the reaction system, steric hindrance, and granule structure of KGM with different Mw values.
KGM分子量对该反应的影响与不同分子量KGM的溶解度、体系粘度、空间位阻及颗粒形态等因素有关。
The space charge model, the fixed-charge model, the electrostatic and three-dimensional hindrance model, Donnan-steric pore model can be applied to characterize electrolyte and ion separation.
分离电解质和离子时包括空间电荷模型、固定电荷模型、静电阻碍模型和道南-细孔模型。
The space charge model, the fixed-charge model, the electrostatic and three-dimensional hindrance model, Donnan-steric pore model can be applied to characterize electrolyte and ion separation.
分离电解质和离子时包括空间电荷模型、固定电荷模型、静电阻碍模型和道南-细孔模型。
应用推荐