氧化还原

Diketoreductase is a new class of enzyme, and compared to other oxidoreductase, the unique property is that it can be reduced diketone substrate to corresponding dihydroxy alcohol with high stereoselectivity.

双羰基还原酶（Diketoreductase，DKR）是一类全新的酶，与其他的氧化还原酶相比，其独特之处在于它能够同时还原两个羰基还原成羟基，并有高度的立体选择性。

The results show that the periodic average yield of acrylonitrile under any forced periodic oscillation of oxygen concentration among this experimental conditions,thus obtained could higher than that under the steady-state condition.

而为完成整个氧化还原循环过程，气相氧分子就必须在不同丙烯吸附中心的再氧化中心上吸附，获得电子，解离后扩散进入催化剂中的阴离子孔穴，如图1所示。从该机理可知，反应气氛中的氧烯比大小对催化剂表面的氧化还原反应过程的循环有重大影响。

This article mainly explains the safety principium of infectant factors in waste water vented by the paper making industry in China. Through the study on the experiment in open country and indoors with soil pole, indicating that it is a complicated process of biochemical degradation to form a layer, which has a biochemical capability to process COD degradation in polluted water from paper making industry.

综述我国造纸业污水中的污染因子危及地下水水质安全的机理，通过对野外试验和室内土柱试验的过程及结果进行分析研究，表明在包气带中形成一个以生物化学作用为主的生化层在造纸污水中COD降解是一个复杂的生物化学降解过程；生化层在天然状态下形成，由生物氧化带和生物氧化还原带形成，其形成过程具有明显的阶段性；只有当生物氧化还原带形成后，生化层才发育成熟，具备对COD降解的生化能力；生化层空间分布，仅局限在污水池、渠底部包气带中有垂向渗流的部分。

However, it is hard to prepare high valent Mn complexes with ligand with only neutral chelating nitrogen atom of two dpa arms in 〓. In order to get a Mn dimmer complex with high oxidation states of manganese to increase the possibility of storing more oxidizing equivalents necessary to oxidize water evolving oxygen, some N atoms are replaced by anionic phenolate groups.

本文以高价金属的稳定、氧化还原性能的改善、各金属离子之间联系的增强等作为主要研究内容，来改进以往模型中金属价态较低，氧化还原电位高，不利于形成氧化活性中间体；多核配合物的研究较少，且各金属活性中心相互协同作用弱等问题。

Both niobic acid and niobium oxide can be used as either catalyst,promoter or support in the heterogeneous catalytic reactions,such as selective oxidation,hydration,hydrolysis,alkylation,dehydrogenation and hydrogenation,because of their acidic and redox properties.

作为一种新型的催化材料，铌酸-氧化铌由于其独特的酸性和氧化还原性正受到越来越多人的关注。它可以作为催化剂的活性组分、助剂或载体使用，在烃类转化、选择性氧化、水解、水合、缩合、加氢脱氢等若干酸碱和氧化还原反应中得到广泛的应用。

Self-made tungsten trioxide (WO_3) by calcining ammonium paratungstate was selected as the raw material to produce ultrafme and homogenous tungsten powder by oxidation-reduction method.

通过研究，得到如下结论：(1)本研究选取的三氧化钨原料，通过氧化—还原法(4次氧化5次还原)是可以制备出超细钨粉的；所得金属钨粉的平均粒度约为0.38μm。

In deaerated buffer solutions, the cyclic voltammetry of the composite films of GOx-Au NP-CHIT showed a pair of well-behaved redox peaks that were assigned to the redox reaction of GOx, confirming the effective immobilization of GOx on the composite film.

研究表明：在除氧缓冲溶液中，葡萄糖氧化酶-壳聚糖-纳米金复合膜修饰电极表现出一对良好的氧化还原峰，这对峰归因于葡萄糖氧化酶的氧化还原，证明葡萄糖氧化酶被成功固载于复合膜内。

In order to solve chromium waste water by means of electrolyzed deoxidation, we apply polyacrylonitrile carbon blanket as pole, graphite as bipolar plate, positive ion film as diaphragm, to an oxidation-reduction system, in which negative pole electrolyzes and reduces chromium waste water; meanwhile, oxides Fe~{2+} into Fe~{3+} in positive pole.

为了电解还原处理含铬废水，以聚丙烯腈碳毡作电极，石墨板作双极板，以阳离子交换膜为隔膜，组装出氧化还原电池系统。此系统阴极电解还原处理含铬废水，同时阳极氧化Fe2+为Fe3+。电池系统的平均电流效率达92.29%，处理后废水中铬含量小于10-5mol/L，达到国家排放标准

The application, proposed hydrotalcite-like compounds as a new type of environmentally friendly solid catalysts in the aldol condensation, nitrile hydrolysis, epoxide ring-opening reaction of the oxidation of aromatic compounds, alcohols oxidation, reduction of nitro compounds, and many other important reactions in organic synthesis has an important application potential, and with little pollution compared to conventional catalysts, easy separation of advantages of high reactivity.

叙述了水滑石类化合物作为固体酸碱催化剂、氧化还原反应催化剂、催化剂载体等方面的应用情况，提出了水滑石类化合物作为一类新型的环境友好的固体催化剂，在醇醛缩合、腈类水解、环氧化物的开环反应、芳烃类化合物的氧化、醇类氧化、硝基化合物的还原等许多重要的有机合成反应具有重要的应用前景，并且与传统催化剂相比具有污染小、易分离、反应活性高等优点。

Part one (chapter 1~4) is about the coppermediated biomimetic oxidation of naphthols and 2-naphthylamine.

中文题名氧化还原酶模型及在仿生有机合成中的应用副题名外文题名 The model of oxidoreductases and its application in biomimetic organic synthesis 论文作者谭端明导师许遵乐教授学科专业有机化学研究领域\研究方向学位级别博士学位授予单位中山大学学位授予日期2002 论文页码总数172页关键词模拟酶氧化还原酶仿生氧化铜胺络合物抗肿瘤药物馆藏号BSLW /2003 /O629 /5 本文包括两部分内容：第一部分（1~4章）为萘酚类和2-萘胺化合物在含铜化合物作用下的仿生氧化偶合反应研究。

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。