非对称的

The self-supported chiral catalysts as novel immobilization of homogeneous catalysts strategy demonstrated excellent enantioselectivities in heterogeneous catalysis of a variety of asymmetric reactions.

近年来，手性自负载催化剂作为一种新的负载模式，已经成功地应用于一些非均相催化的不对称反应中。

The new model introduces a modified term M , which includes the contribution to total energy from the angular distribution of an atomic electronic density, and can fit the negative Cauchy pressure of such as Cr.

本文导出了一个普适分析型嵌入原子模型，该模型引进了一个描述原子电子密度分布的非球对称部分对系统总能量贡献的修正项M，它能正确拟合具有。。。

We have classified all types of the solvable Lie algebras with nondegenerate invariant bilinear form.

我们给出了带有非退化不变对称双线性型的可解李代数的完全分类。

By using the QCD factorization approach, we calculated the new physics contributions to the branching ratios of eight two-body charmless decays: B → Kπ, Kη~ After the inclusion of new physics corrections in the MSSM, the agreement between theoretical predictions and the measured values are improved.

2我们还在最小超对称标准模型下，计算了对B→KπKη~(等8个非粲强子衰变道的新物理修正。从整体上来看，新物理修正改善了理论预言和实验数据之间的符合程度。

In this paper, asymmetric synthesis of oxidation reaction of achiral isophorone influenced by artificial centrifugal force field was studied. The reaction system was characterized by UV, Infrared and Circular dichroism.

本文通过紫外、红外和圆二色光谱表征考察了外在离心力场对非手性化合物异佛尔酮不对称氧化生成光学活性产物的影响。

A readily available β-sulfonamide alcohol-titanium complex was found to be effective on promoting the asymmetric addition reaction of an alkynylzinc reagent to unactivated simple ketones under very mild conditions.

为此我们合成了一系列β-磺酰胺基醇，并将其作为配体与Ti4一起催化炔基锌对简单非活化酮的不对称加成反应。

The outer valence shell binding energy spectrum of benzyl alcohol was also obtained.

实验在非共面对称几何条件下完成，入射电子的能量为2400 eV加结合能。

Optically active ethyl-3-hydroxybutyrate,a useful chiral synthon,was prepared by stereoselective reduction of ethyl acetoacetate of the bread yeast in organic solvent.

利用面包酵母在非水相中不对称还原乙酰乙酸乙酯，制备了光学活性的手性化合物S-3-羟基丁酸乙酯。

This method had been applied to determination of the optical purity of the product from asymmetric ring opening of meso- epoxides.

方法已用于非手性环氧化合物不对称开环反应产物β-氨基醇及β-羟基硫醚类化合物的光学纯度鉴定。

In the present study, the effect of centrifugal force was investigated by three dimensional finite element analyses; the vibration characters of random mistuned blade-disc were also being investigated by probability methods and the Young's modulus of material of all blades are regarded as random parameters.

结果表明，离心力对失调叶片轮盘系统局部化振动有减弱作用；所有叶片弹性模量在5%误差范围的随机失调系统，其固有频率与非失调相差很小，即失调叶片—轮盘系统可以按照循环对称结构进行模态分析。

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％。