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1·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。

2·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。

3·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。

4·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。

5·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。

6·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。

7·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。

8·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。

9·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。

10·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。