查询词典 promoters

Mutation of the gARID1 binding site in the cwp1 promoter resulted in a decrease of promoter activity and mRNA levels during vegetative growth and encystation, suggesting that the gARID1 binding sites are positive cis-acting elements of the cwp1 gene promoters in both trophozoites and encysting cells. Using cotransfection assay, we also found overexpession of gARID1 can increase luciferase activity and mRNA levels, while mutation of the gARID1 binding sites of the cwp1 promoter resulted loss of this transactivation.

我们也用萤光酵素基因接上cwp1基因启动子，如果将其cwp1启动子上的gARID1结合位置突变，也可以发现萤光酵素和讯息RNA的表现有明显的下；再用cotransfection assay，可发现gARID1会使萤光酵素和讯息RNA表现明显上升，然而如果将其cwp1启动子上的gARID1结合位置突变，这种转活化则消失。

In the process of Chinas early modernization, merchant organizations are one of the supremely important forerunners and promoters.

在中国早期现代化的历程中，商人团体是极其重要的开拓者和推进者之一。

For constructing strong combined promoter to enhance the foreign gene expression in Fowlpox virus vector, four oligonucleotides were synthesized according to the essential structure of the vaccinia virus nature promoter P7.5 and were used for generating early and late promoters.

要提高外源基因在鸡痘病毒载体的表达量，必须使用强启动子来控制表达。为构建较强的启动子组合，根据痘苗病毒天然启动子P7.5的结构，人工合成4条寡核苷酸，形成一个早期启动子和一个晚期启动子，其首尾可相互连接。

Unexpectedly, we find that 3,330 gene promoters are associated with all of these histone modifications.

出乎意料的是，我们发现，3330基因启动子和所有这些组蛋白修饰相关。

Multi-hydrogen-groups on the catalyst make deep hydrogenation or hydrogenolysis take place. Adding promoters in the copper-substrate and zinc-substrate catalysts helps to formatting the multi-hydrogen-groups on the surface of them.

通过助催化剂的添加，在Cu基催化剂和Zn基催化剂上产生多氢吸附集团，可以改善催化剂深度加氢或氢解反应的性能，以有效地调控深度加氢反应。

Therefore, inducible promoters, which are expressed only when exposed to stresses, are of importance.

因此， 只在胁迫条件下才会驱动外源基因表达的诱导型启动子的研究显得尤其重要，已成为目前研究的热点。

Effect of salinity,sodium silicate,mixed alkaline,promoters and polymer on dynamic interfacial tension were studied.

考察盐、碱、助剂、聚合物对表面活性剂的动态界面张力的影响。

It was found that Pd-Co/active carbon catalyst was the optimal catalyst, and Pd-Co/γ-Al2O3 was also good, but silica and kieselguhr were not proper carriers for the object reaction, because of their stronger surface acidity, which could result in the formation of polymer, jammed the micro pores of catalyst, and then resulted in its deactivation. Addition of Bi, Ce and Cu promoters could not improve the activity of catalyst, but La and Ba promoter could enhance the activity of catalyst apparently, and the Co was the best promoter, especially Co was impregnate in advance. It was attributed to that the pre-impregnated Co may occupy the micro pores of active carbon, and cover some bad functional groups on the surface of catalyst, so that the active and selectivity of catalyst could be enhanced obviously.

研究结果表明，Pd-Co/活性炭催化剂是目标转移加氢反应的最适宜催化剂，Pd-Co/γ-Al203效果也较好，而硅胶和硅藻土由于表面酸性较强，容易造成生成聚合物而堵塞催化剂微孔、使催化剂迅速失活；此外，添加Bi、Ce、Cu等助剂时对活性并无改善作用，而添加La和Ba助剂时可使Pd的催化活性有所提高，效果最好的是Co助剂，尤其是先浸渍Co的Pd-Co/C催化剂，原因是Co占据了活性炭的微孔、覆盖了某些对目标反应不利的官能团，使其活性和选择性都有较大幅度的提高。

Pb and Fe as promoters, Pd/CaCO3 Lindlar catalysts were modified by impregnation method of fractional steps on unique supports. The new catalysts were prepared for one-step oxidative esterification of methacrole to continuously synthesis methyl methacrylate.

以Pb、Fe为助剂用分步浸渍法在特制的载体上改性Pd/CaCO3催化剂，制备了用于甲基丙烯醛一步氧化酯化液相连续法制备甲基丙烯酸甲酯的新型催化剂。

In this study,we constructed two plant expression vector with rip gene from barley and linked to two promoters which have high promoting efficiency in monocotyledonous plants,respectively,and then transferred to rice mediated by Agrobacterium Tumefaciens.

本研究构建了分别由单子叶植物中启动效率较高的PactⅠ和P2×35s启动子调控的大麦核糖体失活蛋白基因的植物表达载体，通过农杆菌介导法转化水稻，经PCR检测初步验证了rip基因已导入水稻。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。