查询词典 chirality

When ligands with only planar chirality were used in the two model reactions (allylic alkylation and amination), comparatively high enantioselectivities were obtained.

令人鼓舞的是设计合成的只具有平面手性的膦氮配体，也可以取得中等到良好的对映选择性。

This thesis focused mainly on studying the role of planar chirality in asymmetric catalysis, synthesizing novel ferrocene ligands and applying them to palladium-catalyzed allylic substitution reactions.

本论文主要是研究二茂铁平面手性在不对称催化反应中的作用，设计合成新型二茂铁配体及其在钯催化烯丙基取代反应中的应用。

Asymmetric autocatalysis combined with chirality amplification has been made the new concept in chirality origin .

不对称自催化反应结合手性放大作用，使人们对手性起源有了新的认识。

It is found that the polarization of light has an important influence on the Raman spectra, while the influence of chirality of the boron nitride nanotubes is little.

计算结果表明：光的偏振方向对拉受散射强度影响较大，而手性对拉曼光谱的影响较小。

Chirality is one of the essence attributes of nature.

手性是自然界的本质属性之一。

In this reaction the matching of planar chirality and central chirality is also important.

在该反应中平面手性和中心手性的匹配也是重要的，平面手性仍然决定了产物的绝对构型。

Methods:Research history of the survey chirality molecule and chirality impact on pharmacology function of medicine.

方法综述手性分子的研究历史和药物手性对药理作用的影。

It introduced the concept "chirality" to the field of product design. The influence of the product' s chirality to the operating efficiency was analyzed. It also explored the disadvantages of the current design strategy, i.e.,"keeping highly consistent with the laterality of user' s handedness", and suggested several possible approaches to solve the chirality problems of product so that the operating efficiency could be improved with design.

将"手性"概念引入产品设计领域，分析研究产品手性对于产品在使用时的工作效率所造成的影响，提出现行的"与使用者惯用手的偏侧性保持高度一致"的产品手性设计思维定势所导致的设计缺陷，并提出解决产品手性问题的几种实现途径，力求从产品设计环节就为产品在使用时有更高工作效率提供保证。

The induced supramolecular chirality was found to be dependent on the absolute configuration of lateral residues, that is, the polymers with-configurational oxazolinyl chromophores tended to form chiral aggregates with levorotatory handedness, while polymers obtained from the-monomer offered dextrogyrate one upon the addition of Cu salt. A model, in which side groups would arrange in a helix fashion, is employed for describing the unusual chirality.

由此提出了侧基在Zn／Cu协同配位作用下形成螺旋状排列的模型，即侧基螺旋模型。N-噁唑啉苯基马来酰亚胺与甲基丙烯酸甲酯共聚得到了耐热性能好(热分解温度大于296℃)的光学活性聚合物~(25D=-7.8°(来源：Af4BC论文网www.abclunwen.com)～-36.6°。

Based on chirality electromagnetism theory, the models of intrinsic chirality and screw structure which making carbon nanotubes wave-absorption in millimeter to centimeter wave band has been presented.

根据手性电磁理论，碳纳米管的本征手性模型和螺旋结构模型会产生毫米波段或厘米波段的吸收。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。