不对称

As the chiral source of asymmetric induction, the chiral ligands control the procedure of stereochemistry in reaction.

在手性催化反应中，手性配体是不对称诱导的手性源，控制着反应的立体化学过程。

The stereochemistry of the asymmetric polymerization of TrMA as the chiralligand was discussed.

讨论了TrMA在-Sp存在下的不对称聚合过程中的立体化学。

These carbon pairs were formed by the interaction between the substitutional carbon atoms and their neighboring interstitial carbon atoms.

铁—镍合金中碳扩散峰的特徵是：峰的二边内耗曲线不对称，在高温的一边，内耗反而比低温的一边为低。

Four new chiral sulfonamide alcohol s were synthesized from camphor and L-phenylalanine and their application to the enantioselective addition of diethylzinc to benzaldehyde was described.

由天然樟脑和-苯丙氨酸合成了4个新的手性磺酰胺醇，并对其在二乙基锌对苯甲醛的不对称加成中的催化性能进行了研究。

Four new chiral sulfonamide alcohols were synthesized from camphor and L-phenylalanine and their application to the enantioselective addition of diethylzinc to benzaldehyde was described.

由天然樟脑和-苯丙氨酸合成了4个新的手性磺酰胺醇，并对其在二乙基锌对苯甲醛的不对称加成中的催化性能进行了研究。

In this chapter, we report the synthesis of an alkyl imidazo lium salt supported chiral sulfonamide ligand and its use and recycling in enantiosel-ective reduction of prochiral ketones to optically active secondary alcohols.

在这里我们报道了一种离子液体接枝的磺酰胺手性配体以及在前手性酮的不对称还原反应中的应用，获得了较好的对映纯过量，实现了手性配体的回收和重复使用。

The application of chiral sulfoxide's inclusion resolution in the preparation of chiral drugs and asymmetric Stre...

本论文研究和探索了手性亚砜包结拆分技术在手性药物的制备和不对称Strecker反应中的应用。

The application of chiral sulfoxide's inclusion resolution in the preparation of chiral drugs and asymmetric Strecker reaction was studied in this thesis.

本论文研究和探索了手性亚砜包结拆分技术在手性药物的制备和不对称Strecker反应中的应用。

Some key developmental events of embryogenesis, such as directional expansion, asymmetrical first division, suspensor formation and degeneration as well as embryo differentiation, occurred as that in in planta embryogenesis in the experimental condition.

追踪观察表明，合子体外胚胎发生过程中关键发育事件，如合子休眠期间的定向生长、一次不对称分裂的完成、胚柄的形成和解体、胚的分化等过程均可在体外重现。

A series of homemade needles and guides for underlying guided suture was used to treat the skin laxity in 42 cases of facial paralysis and 15 cases of facial aging science 2006. All of them were used the suture technica of deep-seated suspensory . Results 40 in 42 facial paralysis cases obtained satisfactory effect, and the effect of them were steady in 6 to 12 months followed-up .

自2006年以来我们采用自行设计的李氏埋没导引缝合针和李氏埋没导引缝合器，以埋没导引的方法，通过深部组织缝合悬吊的技术治疗面神经瘫痪遗留的面部表情不对称42例，其中完全性面瘫31例、部分性面瘫11例；治疗面部老化造成的皮肤松垂15例。

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％。