催化的

As expected, TS-1 exhibited high catalytic activity as well as perfect selectivity in the reduction of nitric oxide by excess hydrogen.

如我们所预料，TS-1在用过量氢气催化还原NO的反应中表现出高的催化活性和很好的选择性。

These catalysts were found to have good activity and reusability in the Heck vinylation of aryl iodides and acrylate, among which the ethylenediamine modified resin supported Pd(0) catalyst kept a high activity at the 17th run at 90℃.

结果表明，该类催化剂具有良好的催化活性和重复使用性能，其中用乙二胺功能化树脂负载的Pd(0)催化剂在90℃重复使用17次时能保持良好的催化活性。

The coupling reaction of aryl iodides, bromides and chlorides with differentolefins catalyzed by catalyst 2 and 4 was studied. It was found that compounds 2 and 4 anchored on active carbon are efficient catalyst for the Heck reaction in the case of aryl bromides and aryl chlorides as substrates (Scheme 3). It is notable that catalyst 4 has higher efficiency for aryl chlorides.___^H Cat.2 or 4, Base HXSolution, 100C or 140

以化合物2和4为代表，重点研究了活性炭负载的二茂铁亚胺环钯化合物催化碘代苯、溴代苯和氯代苯与活泼烯烃之间的偶联反应(Scheme 3)，发现活性炭负载的二茂铁亚胺环钯化合物2和4均可用于催化多种溴代和氯

A new catalytic spectrophotometric method for the determination of trace iodide has been established by reverse flow injection technique based on iodide catalyzing determination reaction of victoria blue with potassium bromate in the phosphoric acid.

基于在磷酸介质中I-对溴酸钾氧化维多利亚蓝褪色反应的催化作用，建立了一种用反相流动注射催化动力学光度法测定微量元素碘的新分析体系，该方法的线性范围为0.2~4.0μg/mL，检出限为0.12μg/mL，相关系数为

The methods are based on the direct CL reaction of epinephrine with luminol in the presence of potassium ferricyanide and potassium ferrocyanide in alkaline solution or based on the inhibitory effect of paracetamol on the luminol-potassium ferricyanide CL reaction.

人们普遍认为具有不变价态的第二主族元素（碱土金属 Mg》，Caf&，STz&和 B／离于）在通常条件下既没有氧化还原性，也没有催化活性，因而一般认为它们即没有基于氧化还原性的化学发光行为，也没有基于催化活性的化学发光行为。

Methods: Copper was determined by catalytic kinetic spectrophotometric method which was based on the copper catalyzing oxidation of brilliant green by potassium chlorate and hydrogen peroxide in potassium hydrogen phthalate-sodium hydrate buffer solution at pH4.20. The absorbance was measured at 624 nm.

在pH4.2的邻苯二甲酸氢钾－氢氧化钠缓冲溶液介质中，利用铜离子催化氯酸钾和过氧化氢氧化灿烂绿的指示反应，通过测量624 nm下吸光度的改变，用催化动力学光度法测定痕量铜。

The characterization of ESR and IR spectroscopy shows that hydroxyl radicals and peroxide species are important intermediates in these oxidations.

同时利用电子自旋共振、红外等表征手段对催化反应的机理和反应路径进行了讨论，羟基自由基和铜的过氧物种被认为是催化反应的重要中间体。

TiO〓/K-M supported Ag/SiO〓 composite ceramic membrane tubes have been prepared and used as a membrane reactor for selective separation of C〓H〓 during the catalytic reaction process of CO〓 partially oxidating C〓H〓. By removing C〓H〓 produced in the catalytic reaction, thermodynamic balance of the reaction is upset and some side reactions from C〓H〓 are avoided, thus the conversion rate of C〓H〓 and the selectivity to C〓H〓 are effectively increased.

本研究设计、制备了硅藻土—莫来石陶瓷管负载的Ag/SiO〓复合膜，并将其应用于二氧化碳部分氧化乙烷催化反应过程中产物乙烯的选择性分离，有效地提高了催化反应的反应物乙烷转化率和产物乙烯选择性。

Because of advantages such as containing metal-free, so the organocatalyst has not the potential risk of leaching of toxic metal ion to the environment; generally has good catalytic activity, some might exhibit peculiar character and catalytic mechanism as enzyme; easily handled, can be performed in solution or air without the necessity of severe conditions like water-free a...

因为其不含金属离子，不存在有毒金属离子泄漏而造成环境污染；一般具有较高的催化活性，有些显示出类似酶的特性和催化机理；反应容易操作，可在溶液或空气中进行，不需要无水无氧等苛刻条件；价格一般比较便宜，易于制备、修饰和改性，可调控性大；易于与产物分离及从反应体系中回收等一系列&绿色&的优点。

Because of advantages such as containing metal-free, so the organocatalyst has not the potential risk of leaching of toxic metal ion to the environment; generally has good catalytic activity, some might exhibit peculiar character and catalytic mechanism as enzyme; easily handled, can be performed in solution or air without the necessity of severe conditions like water-free and oxygen-free.

因为其不含金属离子，不存在有毒金属离子泄漏而造成环境污染；一般具有较高的催化活性，有些显示出类似酶的特性和催化机理；反应容易操作，可在溶液或空气中进行，不需要无水无氧等苛刻条件；价格一般比较便宜，易于制备、修饰和改性，可调控性大；易于与产物分离及从反应体系中回收等一系列&绿色&的优点。

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％。