查询词典 deactivation

Coking and deactivation of zeolite catalysts in the synthesis of propylene glycol ethyl ether from propylene oxide and ethanol at lower reaction temperature were studied in this thesis.

本文选择反应物与生成物都含有氧原子的自环氧丙烷和乙醇合成丙二醇乙醚作为典型反应，研究较低温度下在沸石催化剂上反应过程中的的积炭失活规律。

Resinification of furfural on the catalyst was the main cause of deactivation .

糠醛树脂化结焦是导致催化剂失活的主要原因。

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主要产品有：无腥豆奶生产线、无腥豆奶粉生产线、花生奶设备、花生粉设备、多功能大豆脱皮机系列产品、液体牛奶设备；奶粉加工设备、大豆分离蛋白设备、粮食干燥设备、大豆连续干燥机、大豆脱皮机、定量上料器、失活软化机组、粗磨机、精磨分渣机组、杀菌脱腥机组、双效浓缩设备和喷雾干燥塔。

These variants change the conformation and stability of nucleosome to facilitate transcriptional activation or deactivation, DNA repairing, heterochromatin formation, and others.

这些变体通过改变核小体的空间构象和稳定性，决定基因转录的激活或沉默，DNA的修复，染色体的异染色化等。

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。

Result］the operation time was 1～3 h,the operative bleeding quantity were 150～400 ml,all incisions were obtained primary healing.twelve cases were followed up from 6 months to 8 years.the average extremity functional score according to the system of isols（international society of limb salvage）:upper extremity was 22.3 and the lower was 25.3 the average bone healing time of returned deactivation bone graft and bone allograft healing with the osteotomy plane was 3 months,original tumor recurrence in local was 1,the recurrence rate was 7.69%,no malignant change and metabasis was found.

结果］手术时间1～3 h，术中出血量150～400 ml，术后切口一期愈合。12例患者获6个月～8年随访。按isols评分标准评价肢体功能恢复情况：上肢平均22.3分，下肢平均25.3分。灭活回植骨、异体骨与截骨端平均3个月愈合，局部复发1例，复发率7.69%。无恶性变及全身转移。

This does not obligatory mean existence of independent metastability of these traps or their deactivation , but is mainly related with new positions of quasi-Fermi levels when the sample becomes slightly p-type.

观察的过程是：（1）EL2的光淬灭，（2）光致恢复，该过程导致TSC谱中大多数空穴峰的改变，但在PQ前没有TSC峰的再现，（3）用PQ光重照射。

Methods Using the object's surface sterilization test to simulate the field experiment,and detect the deactivation effects of the methanal ultrasonic nebulization sterilizer on poliovirus-contaminated glass slides.

方法通过物表消毒模拟现场试验，检测甲醛超声雾化消毒器对污染于玻璃载体表面的脊髓灰质炎病毒灭活效果。

It was found that moisture in the system of reaction is main reason that lead to deactivation of ionic liquids. The reaction mechanism of transalkylation reaction of methylnaphthalene and 1,2,4,5-tetramethylbenzene catalyzed by chlorine-aluminate ionic liquids has been proposed.

考察了离子液体的循环使用情况，分析确定了离子液体的失活原因，认为反应体系中的微量水使离子液体水解是造成离子液体失活的主要原因。

The research results show for low Sn concentrations, for example 1wt%Sn with respect to Ni, the Ni/Sn surface alloy is energetically preferred. We have also used XPS to characterize the catalysts. The quantified Sn and Ni XP spectra for Ni/Sn/SLT catalysts show that Sn preferentially segregates to the surface of the Ni/Sn alloy. We demonstrate that supported Ni/Sn alloy catalyst provides significantly higher reforming reactivity and resistance to deactivation via carbon deposition than supported monometallic Ni catalyst both in steam reforming of CH4 and CO_2 dry reforming.

本文以SLT为支撑体，利用Sn对传统的Ni基催化剂进行表面合金化处理，成功制备了Ni/Sn表面合金重整催化剂，将该催化剂用于甲烷和丙烷的CO_2重整和水蒸汽重整反应，研究结果表明，在Sn浓度很低的情况下，例如1wt%Sn含量，从能量角度看更易于形成表面合金，XPS数据也显示Sn更易于富集在Ni/Sn合金催化剂表面。

He knows that he's one of the mostdominant players in the NBA right now.

我知道他现在是联盟里最有统治力的球员之一了。

Using analysis method of BCG , the dissertation analyzed the management of voluntary service organizations .

利用BCG分析方法对我国的志愿服务组织管理进行了分析。