筛选

The second reaction we tested was diastereoselective Michael-Aldol annulation of -keto ester 121 with methacrolein to give a key intermediate for synthesizing (--Huperzine A.

通过对反应条件的筛选，我们得到的最好的结果是以-乳酸苄酯为手性辅基的β-酮酯121i为底物，以(1R， 2R)-环己二胺衍生的手性胍85i为催化剂，以无水四氢呋喃为溶剂，在-20℃反应，得到的产物的de值为73.2%。

Objective:To observe the protective effect of Lhx4 gene against the PC12 cells injury induced by anoxia.

目的：转染并筛选Lhx4高表达的PC12细胞株，观察Lhx4基因对PC12细胞的缺氧保护作用。

Providing full antenatal care, including screening tests in the hospital, community and the home

提供全面的产前照顾，包括在医院，社区和家里的筛选检查。

By virtue of behavior experience in human society and the characteristics of pervasive computing,in addition,according to dynamic transformation discipline between the lag of trust and the anteriority of service,a trust-based model cascade servers is put forward while trust relatiuon establishment,trust degree estimation and update are depicted.The best server satisfied with the user's request is selected out by means of cascade servers to improve the service of quality and efficiency such as multiple evaluation to trust degree dynamically by direct and indirect methods（the third party's recommendation）,which conquers the disadvantage that a singular equipment can't satisfy the request property and blindfold choice of service.

借鉴人类社会行为关系的规律和普适计算环境的特点，依据信任的滞后性和服务的前瞻性矛盾的动态演化规律，提出普适计算环境中信任关系的建立、信任度的衡量和更新以及基于信任的级联服务模型；通过直接和间接的方法动态地对信任程度进行多角度评估，以级联服务的方式从众多可选择的服务目标中筛选出最符合用户要求的服务，克服了单一设备不能完全满足服务请求属性和服务选择盲目性的缺点，提高服务的质量和效率。

Some researches have been carried out for the electro fusion of building coupling system for degrading anthracene and the choices of fusants.

对选育蒽降解微生物耦合降解系统菌株的电融合过程及融合子的筛选进行研究。

Therefore,screening effective fungicides and antagonistic microbe to Colletotrichum spp. is the mainstudy target for controlling pepper anthracnose.

因此，筛选对辣椒炭疽病菌有强烈抑制作用的杀菌剂和微生物菌株，是防治辣椒炭疽病的主要研究内容。

Overall, this paper is proved to be meaningful in both theoretical explanation and practical application of biodegradation of anthraquinone resembles.

总之，通过本论文的工作，筛选并找到了一株高效降解溴胺酸的菌株，对其降解溴胺酸的特性及降解途径进行了深入的研究，不仅在理论上有助于诠释动胶菌与溴胺酸反应的实质，而且为该菌株处理溴胺酸等蒽醌类染料中间体的实际运用中操作参数的设计和选择提供依据。

Objective:To select sensitive anticancer chemotherapy agents for clinical treatment of lung cancer.

目的：筛选对肺癌化疗的敏感性药物，为临床合理选择用药提供依据。

The finding of subunit change may direct the screen of new antiepileptic drug.

这种受体亚单位的改变为筛选有效的抗癫药物提供新的途径。

This method is simple, rapid and sensitive and it is satisfied in both preservation of tissue construction and antigenicity.

本方便简便，迅速，敏感，是目前筛选内耳疾病患者血清抗内耳自身抗体及非特异性抗体的较为理想的方法。

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％。