查询词典 sterically

The sterically hindered Organosilane protective agents have some special advantages.

位阻型有机硅保护剂具有一些特殊的优点。

It demonstrated that the molecular size matching and the sterically arrangement of groups of studied compounds with nucleoside phosphates are very important for the interaction of them. And the quenching ability depends on the interaction of these species strongly. Evidently, this phenomenon can be used as a method for the molecular recognition of nucleoside phosphate by the changing of fluorescence intensity of these compounds.

实验结果表明，分子尺寸的匹配和化合物中基团的空间合理排布是化合物和核苷磷酸盐间能发生相互作用的重要根据，而猝灭则强烈地依赖于这类物种间的相互作用，因此可利用化合物荧光强度的改变来识别各种不同的核苷磷酸盐。

However,for the catalytic pyrolysis of sterically hindered PP,the effect of mesoporous molecular sieve sructure on pyrolysis results of PP is more important than that of mesoporous molecular sieve acidity.

而对于具有较大空间位阻的PP的催化裂解反应，催化剂酸性在一定范围内对PP的裂解结果影响不明显，表明催化剂孔结构的作用更重要，较大的孔径有利于PP的催化裂解。

When both of them are present, the dispersion forms sterically stable state of strip structure.

TME表明，蒙脱土分散体系中加入 KCl使得蒙脱土颗粒聚集，而聚乙二醇导致经微絮凝；二者同时加入，体系形成细枝条状的空间稳定结构。

With these versatile catalyst systems, electronically and sterically diverse reactants can be efficiently cross-coupled, without the need for substrate-specific optimization of reaction conditions.

凭借这些&神通广大&的催化剂系统，那些电子云和空间位阻各不相同的反应物都能有效地实现交叉偶联，无需针对底物对反应条件优化。

The ratio of intensities of Amide Ⅰ and Amide Ⅱ is reduced exponentially with the time of exchange which shows that the hydrogens sterically located differently have different exchange rate.

应用红外吸收光谱研究不同含水量的溶菌酶膜的H-D交换动力学，以期阐明水合对溶菌酶分子活动性的影响。

In addition, higher enantioselectively was obtained when the groups on the oxazoline ring were less sterically demanding. That is, substrate will be closer to the backbone of ferrocene.

我们发现当恶唑啉上取代基立体位阻减小时我们发现当恶唑啉上取代基立体位阻减小时，产物的对映选择性就会相对较高，因而平面手性的影响很可能就是通过二茂铁非取代茂环和底物及亲核试剂之间的相互作用而产生的。

Ethoxyberberine and 9-isopropanoxyberberine bearing with different sterically hindered groups were synthesized from beberrubine material.

以小檗碱为原料，合成了小檗碱C-9位不同空间位阻取代的9-乙氧基小檗碱、9-异丙氧基小檗碱，通过MS、1H NMR确认其结构。

Under the optimum conditions of n: n=40, mass percentage of ZrO2 18%, temperature 400℃, m m=0.02 and reaction time 0.5 h, the conversion was 91.2% and the yield of liquid products was 83.6%. Compared with the results obtained by thermal pyrolysis and catalytic pyrolysis on HZSM-5, ZrO2/Ti-MCM-41 was of better catalytic activity and higher yield of liquid products, and was especially suitable for the pyrolysis of sterically hindered polymers such as PP.

结果表明，n：n=40，ZrO2负载质量分数为18%的ZrO2/Ti-MCM-41，在反应温度400℃，m(ZrO2/Ti-MCM-41)：m=0.02，反应时间30min的条件下，PP的转化率可达91.2%，液体产物的收率为83.6%，该结果优于热裂解及传统的HZSM-5小孔分子筛催化剂的催化裂解结果。

However, when trans-4-aryl-3-buten-2-ones were taken as the substrates, the electron-rich but less sterically hindered ligand 9c gives the best results (up to 96.4 % ee) with highly catalytic activity.

而富电子但空间位阻小的配体9c对亚节基丙酮类底物获得最好的结果(%。4%ee)，同时还表现了最好的化学活性。

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。