查询词典 oxidations

In supercritical carbon dioxide, the Wacker oxidations of acrolein and of acrylic acid were also studied.

在超临界二氧化碳中对其它邻位有吸电子基团的端烯如丙烯醛、丙烯酸的Wacker反应也进行了研究。

For ethylbenzene and cumene oxidations, it was observed that small amounts of mild-strong acid sites in catalyst could inhibit the reaction.

对烷基芳烃的研究结果显示，分子筛催化剂中少量的中强酸性即可对氧化反应产生强烈阻止作用。

Chemical oxidations of sodium plumbite solution in alkali are readily achieved with chlorine, bromine, and hydrogen peroxide and simple lead salts may be oxidized with 37 M nitric acid.

用氯、溴和过氧化氢在碱性条件下可实现化学氧化铅酸钠。简单的二价铅的盐可用37M的硝酸溶液来氧化

For the long period of oxidation, the Wagner's law for thick film oxidations was obeyed above 1000℃, that is the parabola relationship exists between the oxidation rate and the oxidation time, whereas there exists a linear dependence between them as the temperature is lower than 1000℃.

对于较长时间的氧化而言，CVDRe在1000℃以上的氧化遵循瓦格纳的厚膜氧化规律，即氧化速率遵从抛物线定律；而在较低的温度，CVDRe的氧化失重与时间呈直线关系。

The results showed:1The 6 main products are all fourmemberring compounds produced through the cleavage of double bond of nopol;2Accompany with oxidations of the double bond and tertiary hydrogen in the ozonization,there are other reactions at more indepth levels.

分析结果表明：这6个主要产物都是诺卜醇分子中双键断裂后所形成的四元环类化合物，诺卜醇臭氧化时除了碳碳双键、叔氢被氧化外，还伴有其它更深层次的反应。

Because oxidations always go hand in hand with reduction, we refer to these reactions as redox reactions.

由于氧化反应总是与还原反应同时发生，所以我们称这些反应为氧化还原反应。

A series of indexes reflecting free radical changes, anti-oxidations, Immune function, endocrine function was studied by Chemiluminescence method, immunoturbidimetry, ANAE dye method, micro-hemagglutination inhibition test and radio immunoassay in the chicken with encephalomalicia induced by giving the feed being deficient in VE and extra fish oil artificially. The pathological changes including microscopic and ultramicroscopic changes in the relative organs and tissues were observed.

本实验以一日龄150只海兰兰蛋鸡为实验动物，用低维生素E且添加鱼油日粮饲喂雏鸡，复制脑软化症动物模型，采用化学发光法、免疫浊度测定法、酸性α-醋酸萘脂酶染色法、微量血凝抑制试验、放射免疫测定技术等方法系统地检测了脑软化雏鸡的自由基代谢和抗氧化功能、红细胞免疫功能、细胞免疫功能、体液免疫功能及非特异性免疫功能等指标，并对患雏病理组织进行了显微及超微结构观察。

Homogeneous catalytic oxidations of organic substrates such as alkane and alkene catalyzed by m-oxo-bismetalloporphyrins and flexible alkoxyl oxygen linked-bismetalloporphyrins were introduced,and the catalytic mechanism of these two bismetalloporphyrins,along with the possible synergetic catalysis mechanism of binuclear central metal were discussed.

主要介绍了μ-氧代双核金属卟啉和以柔韧烷氧链相连的双核金属卟啉作为仿酶催化剂在均相催化烷烃、烯烃等有机底物氧化方面的研究进展，并对这两类双核金属卟啉的催化机理、金属双核的协同催化作用机理作了论述，最后展望了双核金属卟啉仿酶催化剂的研究前景。

The result was compared with oxidations of cyclohexene without irradiation and at irradiation without catalyst.

另外，本文还研究了各种类型的催化剂在中压汞灯下光催化环己烯的氧化反应，结果表明，无论上述的哪种催化剂，在中压汞灯下光催化环己烯氧化反应，都得不到环氧环己烷，生成的产物主要为水和二氧化碳。

Two kinds of catalytic oxidations for naphthalene with Fenton reagent and POD catalyst were studied, and the results showed that there were some common points: Fe ion and OH radical all participated in two kinds of catalytic oxidations and α-naphthol was found.

通过Fenton试剂及POD催化H〓O〓与萘的反应过程分析，可以确定两种反应之间有一些相同点，它们是两种反应过程中均有Fe离子及·OH自由基参与，且反应过程中均有α萘酚生成。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。