查询词典 steric

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 primary conclusions of the present work are as following first, the charges of membrane sarface effect the rate of protein adsorption, but do not effect the amount of protein ultimately adsorbed second, the nonspecific adsorption of avidin can be detached by adding a suitable amount of bivalent alkaline-earth metal ions; third, the binding of avidin to membrane bound model receptor is astricted remarkable by the latelal steric hindrence.

实验结果表明，膜表面电荷对非特异性吸附的速率有很大的影响，而对最终的蛋白吸附量影响不大；非特异性的吸附可以通过二阶阳离子的脱附而去除；受体蛋白质与配体间的特异性结合受到侧向空间位阻效应的制约。

Results of structural analyses indicated that the formed complex structure had the effect of steric hindrance on oxidation, and rare earth elements were of the utility to terminate autoxidation chain reaction.

结构分析结果表明形成的络合结构有阻碍氧化的立体效应，而稀土元素具有终止自动氧化链式反应的效用。

And it was found that the effect of strengthening laser energy is similar to that of prolonging the excitation time,and the photochromism process of MR strongly depends on steric hindrance around azobenzene molecule.

偶氮材料的光致变色效应是由偶氮生色团通过光物理化学过程发生顺反异构引起的，所以近年来有大量研究集中在偶氮生色团的顺反异构过程的研究上[10～13]。

The results show that herbicidal activity is closely related to the steric and electronic properties of the 5-position of the benzene ring.

结果表明，此类磺酰脲类化合物的除草活性与苯环5位取代基的立体结构和电场性质密切相关。

However, the presence of steric hindrance and electron-withdrawing groups on the benzene ring would decrease the activity of phenols.

苯环上有供电子基团的酚类化合物反应活性比较好，而钝化基团的存在，则会降低酚羟基的反应活性。

Moreover, the size of the molecule and steric hindrance showed obvious effects on the interaction, while the configuration, sequence and length of carbon chains (increasing 1～2 C) of amino acid residue in the phosphoryl oligopeptides showed little effects on the interaction under ESI-MS conditions.

磷酰化二肽中氨基酸残基的构型、顺序、碳链长短的变化(增加1～2个C)对其与蛋白溶菌酶之间的相互作用在质谱中没有表现出影响。

Combining with the basic concept of steric-mass action theory, which considers both the multi-point nature and the macromolecule steric shielding of protein adsorption, an implicit SMA isotherm formulism for protein adsorption equilibrium on CB-Sepharose is formulated, involving salt concentration as a variable.

同时结合SMA模型所提出的蛋白质吸附的多位点特性和大分子空间屏蔽效应的基本概念，得到了包括盐浓度为变量的SMA等温式方程。

We described that the nitro group is a stronger electron withdrawing and meta activating characters than the imide group, the amino and hydroxy are both electron donating groups and had ortho, para activating characters. The methyl group might have a steric hindrance effect in this reaction. Our results indicated that methyl group at the ortho position of the amino group on the benzene ring, the steric hindrance effect became stronger.

另一方面，由产率上的结果来看，可以得知硝基为强力的拉电子基团，会减少邻位和对位胺基的电子密度比间位多；而氢氧基与胺基是供电子基团，会增加邻位和对位胺基的电子密度比间位多；甲基取代对反应则只有立体障碍的影响，而且与反应的氨基成邻位存在下影响最大。

According to the influences of electronic and steric effects on toxicity, two novel molecular structural descriptors, lone-pair electrons index and molecular volume index were developed to characterize the electronic and steric effects, respectively.

通过分析比较化合物结构与毒性之间的关系，发现分子的电子效应和立体效应是影响毒性的重要结构因素。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。