选择性的

Chapter three focuses on the application of the Baylis-Hillman adduct in organic synthesis and some new exploration was made.

第一章对钐试剂促进的有机反应和Baylis-Hillman反应在有机合成中的应用作了简要介绍；第二章研究了二碘化钐促进的还原消除反应；第三章研究了Baylis-Hillman加成物参与的立体选择性的转化反应。

Therefore, quantum chemistry associated with surface analytical techniques is used to investigate the key surface reactions involved in the growth and functionalization of group-IV semiconductor surfaces.

我们的计算从理论上预测了有机小分子催化反应的机理和可能的反应路线，对于丙烯醇在Si(100)-2×1上表面上的计算表明O—H解离反应是表面选择性的反应通道。

In order to selectively share material with other users, each user is a member of one or more groups,which are identified by a unique number called a Group ID,or GID.

为了与其他用户有选择性的共享资料，每个用户有可能属于一个组和多个组的成员，它们都是通过称之谓组ID或GID的，唯一的认证码来区分的。

Methods Transgenic mice and the intercrossed progeny between the founder mice of human Cathepsin-K gene and wild ICR were detected by Southern blot hybridization with DIG labeling probe.

组织蛋白酶K是一种溶酶体含有的半胱氨酸蛋白酶，它有选择性的在破骨细胞引起的骨吸收中起特殊的作用[1，2 ] 。

But with selective breeding and maybe genetic engineering it would be pretty simple to end up with seeds that produce plants with waxier and more reflective leaves.

但是如果采用选择性的育种和基因工程，这样最后培育出有waxier 和更多反射性的叶子的植物的种子就简单多了。

More research work is needed to ascertain the reaction mechanism to develop new, highly selective zeolite catalysts to increase the conversion of the alkenes.

提出应通过对此反应机理的深入研究以筛选出新的、高选择性的沸石催化剂以提高反应的转化率。

A conjugate addition of alkadienyl carbonyl compound with vinyl palladium intermediates which can be formed from oxypalladation of alkynes or allenes was studied, and 1, 6-addition products were obtained.

发现不饱和烃的分子内氧钯化得到的烯基钯中间体能够与不饱和共轭双烯的醛酮反应，选择性的得到1，6-加成产物。

During the research, one of the best stereoselective results was achieved in Streckerreactions on the aliphatic imines and the possible mechanism was proposed.

在研究过程中，我们发现在CsF促进下TMSCN能够对有α-氢的亚磺酰基亚胺进行高非对映选择性的加成反应并取得迄今为止脂肪族亚胺的Strecker反应的最好结果。

These data suggest that the inhibitors of PARP can not lead to the loss of all kinds of exogenous genes from cell chromosomes and lowering of PARP activity with the use of its inhibitor may have a selectable effect on deletion of the exogenous sequences.

这表明PARP酶的抑制剂并不能引起各种外源基因的丢失，外源基因的丢失可能存在着一种选择性的丢失机制。

In this paper,the properties and mechanism of strong metal-support interaction and its effect on the activity and selectivity in the heterogeneous catalytic reaction were reviewed.

对金属-载体强相互作用的特性，产生的机理以及对多相催化反应的活性和选择性的影响进行了综述讨论

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％。