查询词典 asymmetric

The synthesis of chiral pharmaceuticals is a hot issue of the development in pharmaceutical in the world,asymmetric hydrogenization of which is the successful technology in the chiral synthesis .

手性药物的合成是目前全球药物开发研究的热点，而不对称氢化是手性合成中最成熟的技术。讨论了不对称氢化技术在镇痛类、抗生素类、抗菌类、抗忧郁类以及维生素类等9类手性药物合成中的实际应用

The developing trends of biocatalytic asymmetric synthesis of β-hydroxy acids are also discussed.

最后，展望了生物催化不对称合成β-羟基酸的发展方向。

The developing trends of biocatalytic asymmetric synthesis of β-hydroxy acids is also discussed.

最后，对今后生物催化不对称合成β-羟基酸的发展方向做一展望。

Results Preparation of ss probes by asymmetric PCR and single-pr imer PCR gets success.

结果 不对称PCR及单引物PCR技术制备单链探针均获得成功；目的基因单链探针杂交条带清晰且几乎无背景值。

In the forth part, in the presence of chiral phosphoric acid, highly enantio-enriched (up to 98% ee)α-aryl glycine derivatives could be synthesized via asymmetric transfer hydrogenation of the α-aryl imino esters using Hantzsch ester as the hydrogen source.

第四部分工作中，利用Hantzsch酯作为氢源，高对映选择性地实现了手性磷酸催化芳基酮酸酯亚胺的不对称仿生氢化反应，以最高98％的对映选择性得到苯甘氨酸衍生物。

In chain of commodity wholesale, for problem of asymmetric information, the authority put fixed-amount tax on wholesale, this gives rise to a series problems of tax evasion、unfair tax burden、lower tax burden to small-scale taxpayer and indiscoverable artifices in tax evasion. These not only induce huge fiscal loss, but also destroy the principle of taxation on equity.

在商品批发环节，由于税务机关对批发商存在严重的信息不对称问题，导致对批发商普遍采取定额征收的方式，产生了税款严重流失、税负不公平、小规模纳税人实际税负偏低和逃税手段隐蔽等一系列问题，不仅造成了巨大的财政损失，而且破坏了税收的公平性。

These two calibration methods were compared with numeric experiments. Results indicate that comparing with MSDM, BDM is not only available for the force calibration of non-spherical or anisotropic cells, but also for irregular cells in optical trap potential with inharmonic and asymmetric profiles. The results agree with the experiments reported.

用数字实验对这两种标定方法进行了比较，结果表明：与均方位移法相比，玻尔兹曼统计法不仅适用于各向异性非球性细胞，也适用于非简谐、非对称光势阱中任意形状的生物细胞光阱力的标定，结论与已有直接实验相符。

Catalytic asymmetricα-addtion of isocyanide to polarized multiple bond is a challenging research field, and only few successful examples have been reported so far.

异腈对极化多重键的不对称催化α-加成反应是富有挑战性的研究领域，目前为止，仅有为数不多的成功范例。

In this paper, asymmetric synthesis of oxidation reaction of achiral isophorone influenced by artificial centrifugal force field was studied.

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。

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.

摘要本文通过紫外、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。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失