氧化剂

The zeolitic microcapsulized catalyst prepared in this work behaves the high reusability during the reaction, which retained most of its reactivity after 10 times of reuse.

在催化氧化反应中，以分子氧为氧化剂对仲醇进行氧化的反应由于其本身的高选择性，绿色，经济等特点，在工业界和学术界都受到广泛的关注。

These indicate that ASA,as a main antioxidant,is maintained and improved by increasing DHAR activity during senescence of apple leaves to imped senescence.

说明在苹果叶片离体衰老过程中，抗氧化剂ASA代谢主要是通过提高DHAR活性来维持其高水平，抵制衰老。

Indicates Main Propulsion OXID, FUEL and HELIUM quantity.

显示主推进器的燃料，氧化剂和氦的存量

PANSA nanoparticles were synthesized by oxidative copolymerization of aniline and 2-methoxyaniline-5-sulfonic acid in 1.0 mol/L HCl aqueous solution with ammonium peroxydisulfate as oxid...

PANSA纳米颗粒通过化学氧化聚合法，在无乳化剂或稳定剂存在下，以过硫酸铵为氧化剂，在1.0m ol/L盐酸水溶液中由苯胺与2-甲氧基苯胺-5-磺酸合成得到。

Regular intake of antioxidants is theoretically helpful, but this has not been proven.

经常摄入抗氧化剂是理论上的帮助，但是这并没有得到证实。

The results showed porous silicon exhibited the electrode with porous structure in the more position potential and analogized a plate electrode at the more negative potential.

在氧化还原电位较正的〓S〓O〓和H〓O〓电解液中，在阴极极化时氧化剂向多孔硅价带注入了空穴导致多孔硅产生电致发光。

In addition, we found that 4-phenyl-l,2,4-triazolinium N-ylides reacted withvarious electron-deficient olefins to afford pyrrole derivatives in good yields via 1,3-dipolar cycloaddition oxidative ring fission, In some cases, tetrahydropyrrolo[1,2-b]triazole and pyrrolo[1,2-b]triazole, which are stable and are not aromatized orcleaved in the reaction conditions, could be isolated, This is a facile and novel route forthe synthesis of pyrrole derivatives.

此外，本文研究了五员三氮杂环化合物4-苯基1，2，4-三氮唑的N-叶立德，发现在氧化剂存在下与缺电子烯烃发生1，3-偶极环加成反应生成的吡咯并[1，2-b]三氮唑，在大多数情况下开环生成吡咯衍生物，反应条件温和，收率良好，是合成吡咯衍生物的一个新的途径。

A one-step method for the synthesis of aromatic indolizine derivatives byintramolecular 1,5-dipolar cyclization reaction of 2-(2-arylethenyl)pyridinium N-ylidesin the presence of an oxidant has been studied for the first time. In the presence ofelectron-deficient olefins, however, 2-(2-phenylethenyl)pyridinium N-ylides underwent1,3-dipolar cycloadditions and then aromatized in situ by TPCD to produce indolizinederivatives, indicating 1,3-dipolar cycloaddition proceed more readily than 1 ,5-dipolarcyclization in these conditions. Pyridinium disubstituted N-ylides, readily obtainedfrom corresponding pridinium and β-chlorovinyl ketone, underwent thermalintramolecular 1,5-dipolar cyclization to give indolizine derivatives easily.Indolizinecarbaldehyde derivatives were synthesized starting from 2-pyridinecarbaldehyde in four-steps involving 1,3-dipolar cycloaddition reaction.

本文首次研究了2-(2-芳基乙烯基)吡啶N-叶立德在氧化剂存在下的分子内1，5-偶极环化反应，采用一锅法合成了中氮茚衍生物；研究了这些N-叶立德的1，5-偶极环化和1，3-偶极环加成反应的选择性，发现当有缺电子烯烃存在时，优先进行1，3-偶极环加成反应，而不再发生分子内1，5-偶极环化反应；由β-氯乙烯酮方便地得到了烯丙基N-叶立德，他们在加热时进行分子内1，5-偶极环化反应而得到中氮茚衍生物；由2-吡啶甲醛为起始原料，通过1，3-偶极环加成反应等四步反应，得到了重要的中氮茚甲醛衍生物，这些反应都具有条件温和和操作简便的特点，是合成中氮茚衍生物的新方法。

It was found that environmental protection type strong oxidants assorting with desilication agent,solution of Na2S2O8 and KF 2H2O for instance with co.

经过大量的实验数据分析，文章提出：环保型强氧化剂和除硅剂的复配，在有效降低环境污染的同时能取得良好的除杂效果。

In the reaction, industrial chlorinating agent and brominating agent with low cost and easy acquisition are used as oxidants to oxidize the ethyl lactate into the ethyl pyruvate.

反应中使用了廉价易得的工业用氯化剂、溴化剂作为氧化剂，将乳酸乙酯氧化为丙酮酸乙酯。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。