查询词典 oxidation-reduction

Recent developments of clean oxidation systems catalyzed by polyoxometalates are summarized in detail. The emphasis is on the epoxidation reaction of olefinic compounds, oxidation of alkanes and aromatic compounds with the comparatively ideal oxidants, hydrogen peroxide and molecular oxygen respectively. The oxidation mechanisms are elucidated in detail.

文本总结了多金属氧酸盐在液相清洁催化氧化方面的进展，主要针对以过氧化氢和分子氧为氧化剂的烯烃类化合物的环氧化反应、烷烃和芳香族化合物的氧化反应，并详细探讨了此类氧化反应的反应机理。

The theoretical analysis and the experimental results consistently show that, the oxidation of Si〓N〓-bonded SiC refractory adheres to the parabolical type rule of oxidation and the oxidation in the condition of actual BF operation is passive one.

在此基础上，综合SiC砖蚀损过程研究结果，阐述了炉墙传热过程与其蚀损的相互关系，进而探讨了高炉用Si〓N〓结合的SiC砖的适宜条件，提出了控制碱蚀、减轻热震破坏以及改善高炉用SiC质砖衬的使用效果的技术方向和途径。

When using urea-hydroperoxide as oxygent, just the trimethylphosphine adsorbed on the Lewis acid sites in TS-1 zeolite was oxidized. It further confirmed that the hydroperoxo-titanium species formed by the interaction between the titanium in Lewis acid sites and urea-hydroperoxide are the active oxidation center, and the titanium in the framework as Lewis acid sites enhances the oxidation ability of hydroperoxide. 3. Phenylacetaldehyde and benzaldehyde are found to be the major products in the catalytic oxidation of styrene over TS-1 zeolite, and styrene epoxide is not as speculated detected.

当以过氧化氢尿素为氧化剂时，室温条件下吸附在TS-1分子筛Lewis酸性位的三甲基膦即能被氧化，由此进一步证明，TS-1分子筛中由Lewis酸性位的骨架钛与过氧化氢相互作用形成的过氧化钛物种是三甲基膦氧化反应的活性中心，骨架钛作为Lewis酸中心提高了过氧化氢的氧化能力。

In the study of testing the overall ability of anti-oxidation, polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10) still have the better overall ability of anti-oxidation than control group, trolox. The IC50 values of compound 1-10 range 2.49 to 3.92, while the IC50 value of trolox is 5.23 μg/ml. Compound 10 is still the best derivative which has the best overall ability of anti-oxidation; IC50 value is 2.49 μg/ml.

而在总抗氧化能力结果显示，相较於对照组水溶性维生素E之IC50值5.23 μg/ml，多羟基取代之N-色洛冬宁苯甲醯胺衍生物（化合物1 ~ 10）之总抗氧化能力效果IC50值介於2.49 ~ 3.92 μg/ml之间，十种醯胺化合物的总抗氧化效果皆比对照组水溶性维生素E的抗氧化效果还要来得优越，其中效果最强的仍为化合物10，其 IC50值为 2.49 μg/ml。

The oxidation mechanism of Si3N4 ceramic materials had been discussed by studing oxidation behavior and oxidation kinetics of Si3N4 ceramic materials as well as by reoxidation experiment.

采用氧化后再氧化的实验方法，通过对Si3N4陶瓷材料氧化行为的研究和氧化动力学的分析，讨论了Si3N4陶瓷材料的氧化机理。

Through the addition of rare earth oxidation La_2O_3 and CeO_2 into the electrode coating , the effect of rare earth oxidation on high temperature oxidation and sulphidation resistance is studied and the rational addition amount is suggested.

通过A402，A302，A202及Cr24Ni7不锈钢焊条熔敷金属的抗高温氧化腐蚀性能对比试验分析，设计了新的专用焊条合金系统Cr26Nil6，并在焊条药皮中分别添加微量稀土氧化物La2O3及CeO2，研究不同稀土氧化物添加量对焊条熔敷金属在空气中和含硫气氛中抗高温氧化及腐蚀性能的影响，从而确定了合理的稀土氧化物加入量。

Including high temperature for the pyrolysis of natural gas to produce carbon black and acetylene; steam reforming of natural gas or partial oxidation of natural gas, synthetic gas can be obtained; natural gas through chlorination, sulfide, nitrification, ammoniated oxide, oxidation can be obtained A N all kinds of derivatives; in the wet gas ethane, propane, butane and natural gas liquid condensate, and so on, the steam cracker or pyrolysis to produce ethylene, propylene and butadiene; dehydrogenation of butane oxidation or produce small Diene or acetic acid, methyl ethyl ketone, and maleic anhydride, and so on.

包括在高温下进行的天然气热裂解，主要生产乙炔和炭黑；天然气蒸汽转化或天然气的部分氧化，可制得合成气；天然气经过氯化、硫化、硝化、氨化氧化、氧化可制得甲烷的各种衍生物；湿性天然气中的乙烷、丙烷、丁烷和天然气凝析液等，经蒸汽裂解或热裂解可生产乙烯、丙烯和丁二烯；丁烷脱氢或氧化可生产丁二烯或醋酸、甲基乙基酮、顺丁烯二酸酐等。

During the study of magnetite oxidation, a function for calculating the"equivalent osmosing thickness"of oxygen through the reacted product layer covered the unreacted part is put forward based on the oxidation process properties. It is this function that make the oxidation process model successful.

在球团矿内磁铁矿的氧化过程的研究中，作者针对磁铁矿粉氧化的特点，提出了磁铁矿颗粒表面生成的三氧化二铁产物层的当量扩散厚度的计算函数，将其引入全温度范围球团矿内磁铁矿的氧化过程模型，并获得成功。

The results show that the sulfurized products have great oxidation tendency. With the increase of sulfidation temperature, sulfidation time and air speed, the oxidation tendency increase. And the existence of water has remarkable influence on the oxidation tendency of sulfurized products.

结果表明，干燥的H2S气体能和铁的氧化物发生硫化反应，硫化产物有较高的氧化自燃性，水浴温度高，硫化反应时间长，氧化时空气流速快以及水分的存在能明显加大自燃性。

Whatever the Zn/H_2O_2 ratio is, there is only chestnut bur-like structure appeared after thermal oxidation at 850℃for 8h. DSC-TG results showed that while the content of the ZnO film shell on the zinc nanoparticle surface is about 50.4%, the melting and oxidation processes happened almost at the same time during the thermal oxidation process and the bushiest ZnO nanoneedles can be formed.

DSC-TG分析结果表明，纳米锌粉表面保护膜质量占到颗粒质量的50.4%时，热处理阶段氧化过程和熔化过程几乎同时发生，生长的ZnO针状产物最为茂密；对于微米锌粉，H_2O_2预氧化处理对其热行为及其最后形貌生长都影响不大，热氧化阶段是其控制阶段。

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。