不对称

The data show that the hyperon produced in unpolarized hadron-hadron or hadron-nucleus collisions is transversely polarized with respect to the production plane.

几乎与此同时，实验还发现在单极化强子-强子反应中产生的末态强子存在方位角不对称，被称作单自旋左右不对称。

It is rather limited for market economy to merely depend on the market to solve the problems in the unsymmetry of price information.

在市场经济中仅仅依靠市场来解决价格信息不对称问题是有局限性的，而只有依靠市场、政府、第三方力量等综合手段才能解决价格信息不对称问题。

Started from D-tyrosine, we obtained the tetramic acid 96 using Jouin reaction. The assembly of the second fragment 109 was stared from 1,4-butandiol,using asymmetric alkylation reaction developed by Oppolzer as a key step. Coupling of the tetramic acid 96 with 109 provided the key intermediate 110 according to Yoshii\'s procedure. After remove protective group and Sharpless epoxidation, we obtained the key intermediate 113. Its macrocyclization to form the final product is in progress.

本论文的第二章主要对Macrocidin A开展了合成工作，我们从D构型的酪氨酸出发，经过官能团转换；利用Jouin反应生成Tetramic acid 96，另外一个片断从1，4-丁二醇开始经过多步反应生成碘化物104，利用Oppolzer发展的手性樟脑磺酰胺为辅基参与的不对称烷基化反应，引入手性甲基，生成关键中间体109，接着通过Yoshii发展的方法连接96和109生成110，经过Sharpless不对称环氧化反应建立环氧化合物，然后脱去保护基得到关环前体113，分子内的Mitsunobu反应进行关大环反应正在进行之中。

In this chapter, the MPV reactions catalyzed by alkoxy dysprosium is used to the reduction of prochiral ketones. The chiral alkoxy catalyst was prepared by chiral binaphthol and Dy 〓.

最后还将烷氧基镝催化下的MPV还原反应应用于潜手性酮的不对称还原，利用光学活性的联萘酚制备了手性烷氧基催化剂，结果表明该催化剂可有效地催化潜手性酮的不对称MPV还原。

In order to improve the luminescence and thermal performance of asymmetric ROPPVs, a series of poly derivatives with asymmetric alkoxyl substituents/ nanometer semiconductor composites were synthesized through dehydrochlorination in-situ polymerization.

为了进一步改善不对称ROPPVs的发光性能和热性能，首次采用原位脱氯化氢缩合聚合法，合成出一系列不对称烷氧基取代聚对(来源：9bab9bABC论文网www.abclunwen.com)苯乙炔衍生物／纳米半导体复合材料。

With the fast development of wireless media service, the characteristic of anisomerous traffic between uplink and downlink becomes more and more obvious.

随着无线多媒体业务的迅速扩展，业务上下行不对称的特点日益明显，而TD-CDMA系统具备时隙分配灵活和对多媒体业务有良好适应性的特点，很适于微小区、业务量繁忙、上下行业务不对称、低速移动性的环境，可以解决电信业务中的&热点&问题。

According to the anisomerous differentiation of the needle leaves, the 4 or 5 needles per bundle could be formed under compatible condition, or affected by abnormity factors, such as mechanical, traumatic and insect pest injury

依据针叶原基的不对称发育和分化，如果温湿条件较好，或受到机械创伤，不对称的两个或三个针叶原基可以进一步分化成4个或5个针叶原基而形成4、5针1束。

They often appear asymmetrically, and many causes result in the asymmetric phenomenon together.

大&和&小常体现出不对称现象，有多种原因共同决定了这些不对称现象。

Intrinsic cell fate determinant Numb is the first protein found to be asymmetrically distributed during neural development.

Numb蛋白是神经发育中第一个被发现呈不对称分布的蛋白，是产生不对称细胞分裂的重要因素之一。

Place when three-phase loads are not balanceable on the running occasion of motor energy-saving, which canattaint appliances.

应用中，由于负载的不对称，容易产生三相不对称交流电压，甚至是直流电压，严重时会损坏电气设备。

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％。