查询词典 chiral

In the past years, the chiral SU(3) quark model has achieved success. In this model, the nonet pseudo-scalar meson exchanges and the nonet scalar meson exchanges are considered in describing the medium-and long-range parts of the interactions, and the one gluon exchange describe the short-range repulsion.

过去几年来，手征SU(3)夸克模型已经取得了相当的成功，应用该模型统一地解释了重子基态的能谱，核子-核子以及核子-超子散射过程，并由此预言了实验上可能存在的双重子束缚态。

To complement our Chiral Perturbation theory discussion this week.

9， 10 阅读Georgi的第四、五章，补充本周手则微扰理论的讨论。

In normal phase condition, the influence of temperature and mobile phase modifier on the chiral separation and retention were investigated.

同时考察了温度、流动相中的极性改性剂的种类及结构对手性拆分的影响。

A series of convenient and efficient reactions have been developed. Especially, instead of using toxic phosgene, the triphosgene was employed in the synthetic process of some receptors, which provides a convenient. safe and efficient method for the preparation of chiral unsymmetrical urea.

深入研究了它们的合成方法，实现了多种简便有效的选择性合成，特别是以三光气代替剧毒的光气，实现了一条简便、安全、有效的制备手性不对称脲的方法。

We designed and synthesized a new type of chiral phosphine ligand 32 with rigidity skeleton.

另外，还构建了一种结构新颖，具有刚性骨架的手性双膦配体32。

The purpose of this paper is to synthesize some phosphonium salts with PPh3 and some chiral quaternary ammonium salts with L-Valine. And we also use L-Valine and L-Phe-OMe to synthesize a new type catalyst —2,5-diketopiperazine , the simplest compound of cyclo-peptide.

本文利用廉价易得的三苯基磷和手性L-缬氨酸作为起始原料，合成了几种普通季鏻盐和手性季铵盐，并且利用L-缬氨酸与L-苯丙氨酸甲酯反应，合成了一种新型的相转移催化剂——2，5-二酮哌嗪环类的化合物。

In this paper, the latest progress in the research of chiral phosphoric acid catalysts for relevant asymmetric reactions is reviewed.

本文主要综述了手性磷酸催化剂应用于亚胺相关反应的研究进展。

Then, the radar cross section of a metallic target coated with chiral medium is calculated by the physical optics method.

然后，采用物理光学法计算了电大尺寸金属目标在涂敷手征媒质情况下的雷达散射截面。

The invention relates to a preparation method of chiral alpha-alkenyl-alpha'-alkyl piperidine and relative N-Cbz derivative and an application.

本发明涉及一种手性α-烯基-α'-烷基哌啶及其N-Cbz衍生物的制备方法和应用。

Our products including protected amino acid, pyrrolidine derivatives, piperidine derivatives, nature products, drug intermediates and chiral intermediates.

同时四川艾格尔生物科技有限公司为国内的医药及精细化学公司提供技术服务和咨询。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。