氧化还原

Formyl-3-acetyl-4-methyl-5-carbobenzoxypyrrole (6) was synthesized via the selective oxidation of 2,4-dimethyl-3-acetyl-5-carbobenzoxypyrrole (5), which was produced from acetylacetic benzylester (1) via nitrosation, reduction and addition-cyclization with acetylacetone. The total yield of the product was about 34%.

以乙酰乙酸苄酯(1)为原料，经过亚硝化、还原、与乙酰丙酮加成环化生成2， 4-二甲基－3-乙酰基－5-苄氧羰基吡咯(5)，通过选择性氧化反应制得目标化合物2-甲酰基－3-乙酰基－4-甲基－5-苄氧羰基吡咯(6)，反应的总收率约为34%。

Acylamino compounds from AD were synthesized by cleavage of A-ring through NaIO4/KMnO4 oxidation, ring closure by amination, oximation with hydroxylaminechloride in C-17 position, and reduction of oxime in C-17 position and substitution with substituted acylchloride and carboxylic acids.

本文以AD为起始原料，经过NaIO4/KMnO4氧化裂解、胺解环合、羟氨肟化反应，在甾体17位形成肟，并将肟还原成胺，与取代酰氯和有机羧酸反应，合成了15个酰胺化合物。

Relative role of catalysts and reductants in the formation of metmyoglobin in aerobically stored beef. Meat Sci.

在这个研究中所得的数据，在120 小时贮藏过程中牛肉的变色，可能是Mb的氧化速率大於met-Mb的还原速率所造成。

In this paper beginning with the concept of clectrode potential,according to the mass aition law,Arrhenius formula and chemical equilibrium,we get the Nernst equation and reserch oxidation-reduction and electrochemistry course.

本文从电极电势的产生出发，根据质量作用定律，Arrhenius公式及化学平衡的有关知识推导出电极电势的Nernst方程，并对氧化－还原、电化学等部分进行探讨。

The results show that the ethyl acetate extract of Alpinia oxyphylla Miquel possesses strongest DPPH radical scavenging activity and reducing power in a concentration-dependent manner.

在还原能力、清除DPPH自由基和羟自由基方面，乙酸乙酯提取物表现出了很强的抗氧化能力，呈现剂量依赖关系。

2-Substituted-3,4-dihydro-1(2H)-isoquinolinones were synthesized from methyl 3-hydroxy-ben- zoates via allyl etherification, Claisen rearrangement, oxidation, reductive amination and aminolysis for the first time.

以3-羟基-4-甲氧基苯甲酸甲酯等为原料，通过烯丙基醚化、Claisen重排、氧化、与伯胺反应、还原、分子内酯的胺解六步反应合成了一系列2-取代-3，4-二氢-1-异喹啉酮类化合物。

The results showed that the red pigment belonged to anthocyanidin, it was soluble in water, stable against heat treatment, light, acid and sugar concentration, tolerant to reduction, but sensitive to alkaline, oxidation and Fe(superscript 3+). The research also showed that acid medium is favorable for extraction. The pigments have more general stability in acid medium and have high ufility value.

结果表明：该色素为水溶性多酚类花色素，在不同的pH环境下显示不同的颜色；其耐热性、耐光性、耐酸、耐糖、耐还原性较好，但耐氧化性、耐碱性较差；Fe(上标 3+)对色素有破坏性；该色素的提取宜在酸性介质中进行，酸性条件下其综合稳定性较优，有较高的利用价值。

The results showed that the red pigment belonged to anthocyanidin,it was soluble in water,stable against heat treatment,light,acid and sugar concentration,tolerant to reduction,but sensitive to alkaline,oxidation and Fe~(3+). The research also showed that acid medium is favorable for extraction.The pigments have more general stability in acid medium and have high ufility value.

结果表明：该色素为水溶性多酚类花色素，在不同的pH环境下显示不同的颜色；其耐热性、耐光性、耐酸、耐糖、耐还原性较好，但耐氧化性、耐碱性较差；Fe3+对色素有破坏性；该色素的提取宜在酸性介质中进行，酸性条件下其综合稳定性较优，有较高的利用价值。

Typically, in one direction, the pathway is oxidative, dissimilatory, and produces adenosine 5'-triphosphate, and in the opposite direction, the pathway is reductive, assimilatory, and energy consuming.

经典的循环可以概括为，在一个方向上是氧化，异化，产生三磷酸腺苷即能量，在另一个方向还原，同化，消耗能量。

Autoreduction of Pt〓 ionsin β zeolite is found directly by means of CO-IR and TPR methods.

一。首次系统地研究了β沸石上Pt胺化合物经分解、还原及再氧化等处理过程中发生的变化，并提出关于Pt粒子大小及其状态变化的模型。

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。