查询词典 oxidation

At present,the rate laws and reaction mechanisms of pyrite oxidation,pyrite and chalcopyrite formation,uraninite and magnetite dissolution in aqueous solutions are mainly studied,and it is discovered that (1)oxidation rate of pyrite controlled by surface reaction assume fractional dependence on Fe3+ and O2 molalities in acid solutions;(2)Pyrite cannot nucleate directly from solutions below 300 ℃,it can only form initially through sulfidation of a FeS precursor. The rate equation of reaction between FeS and H2S to form pyrite is of the second order;(3)Chalcopyrite is formed by reactions of pyrrhotite or pyrite with Cu2+,the former proceeds via a series of mediate metastable phases of Cu-Fe sulfide,whereas the rate equation of the latter is apparently of the first order which is controlled by surface reaction;(4)The nonlinear behavior of magnetite dissolution at acid pH can be represented by a shrinking core model coupling with surface reaction and diffusion transport.

目前主要研究了水溶液中黄铁矿氧化、黄铁矿和黄铜矿形成、晶质铀矿和磁铁矿溶解的速率定律和反应机理，发现：(1)酸性溶液中黄铁矿的氧化速率对Fe3+和O2浓度呈分数依赖并受表面反应的控制；(2)低于300 ℃时黄铁矿不能从溶液中直接成核，而需初始地通过FeS先驱物的硫化生成，FeS与H2S反应形成黄铁矿的速率方程为二级；(3)磁黄铁矿或黄铁矿与Cu2+反应均可形成黄铜矿，前者经历了一系列准稳的Cu-Fe硫化物的中间物，后者的速率方程为表观一级并受表面反应的控制；(4)酸性pH时磁铁矿的非线性溶解行为可采用表面反应扩散输运耦合的收缩核模型来描述。

Isothermal oxidation and cyclic oxidation behavior of pure and yttrium -implanted nickel was studied at 1000℃ in air.

对纯镍及其表面离子注钇样品在1000℃空气中的恒温氧化和循环氧化行为进行了研究。

The kinetics of thermal oxidation of rosin and abietic acid absorbed on the polyethylene film were respectively studied. The kinetic equation of heat oxidation was determined by UV spectrophotometry.

设计了松香和枞酸在聚乙烯膜上的氧化反应器，建立了枞酸在聚乙烯膜上的紫外分光光度分析方法，跟踪测定了松香和枞酸氧化反应的过程。

The oxidation of abietic acid was studied by UV spectrophotometer on the polyethylene film. The effect of antioxidants such as MBP, FMH, DBH, DSB3 and DSB6 on the oxidation of abietic acid was discussed. Antioxidant value was used to determine their antioxidative activities.

采用紫外分光光度分析方法研究了枞酸在聚乙烯膜上的氧化反应，考察了MBP，FMH，DBH，DSB3，DSB65种抗氧剂对枞酸氧化反应的影响，提出了用抗氧化值AO考核抗氧剂的抗氧化能力。

These new ionic liquid-supported acetylacetone catalysts were used for the oxidation of the intermediates of Vitamin E (2,3,5-trimethylphenol and 3,5,5-trimethylcyclohex-3-en-l-one). It not only checked the rationality of the design, but also established the base for the green oxidation of corresponding reactions.

论文进一步将此类离子液体支载乙酰丙酮金属催化剂应用于维生素E中间体三甲基苯酚和β—异佛尔酮的氧化过程，一方面检验了催化剂设计过程及结果的可靠性，另一方面为相关氧化反应的绿色化改造提供相关的基础。

The adrenochrome can also take part in oxidation-reduction reaction when the potential is about zero volt, consequently, there is another pair of oxidation-reduction peaks correspondingly in the cyclic voltammogram. The deproton step of the protonated adrenalinequinone, viz.

在强酸性溶液中，由于质子化的肾上腺素醌脱质子步骤即第三步难以进行，故不发生一系列后继化学反应，电解产物停止在肾上腺素醌，从而在循环伏安图上只有一对氧化还原峰。

Most of thesete1lurites and tellurates in these deposits are found to be products of coeval oxidationof calaverite, altaite and sufides, by Which "refractory gold" of Au tellurides will bereleased as naive gold. Most native gold released through oxidation of tellurides,however, will be trapped in the telluraes or tellurites; or be combined by Te intellurites or tellurates, which prevent gold of hyPergene from secondaxy enrichmentunder the supergene oxidation environrnenis.

研究表明，这些碲含氧盐大多数为碲金矿、碲铅矿与硫化物共同氧化的产物，&难溶金&矿物在氧化条件下发生分解，一般释放出自然金；由于金要么以自然金形式被&捕获&于这些含氧盐，要么重新与碲形成Au－Te含氧盐，所以抑制了金的次生富集。

The high-temperature oxidation and degradation behavior were analyzed for the aluminide coating on Co-base superalloy , and the relationship between the oxidation and life has been deduced for the coating.

通过分析钴基超合金外扩散型铝化物涂层的高温氧化及退化行为，并采用近似方法推算，得出了这类涂层氧化和退化与时间的关系。

Aluminum oxide;Nickel aluminide;Functional gradient composite material;Oxidation resistance;Hydrothermal method;Hydrothermal anodic oxidation

中文关键字氧化铝；镍铝介金属；功能梯度复合材料；抗氧化性；水热法；水热阳极氧化法

Conclusions— In cardiac hypertrophy, fatty acid oxidation rates are reduced, whereas compensatory increases in anaplerosis maintain tricarboxylic acid cycle flux and account for a greater portion of glucose oxidation than previously recognized.

心脏肥大时，脂肪酸氧化率降低，更大部分的葡萄糖氧化来保持三羧酸循环通量的补偿反应增加，这是以前没有认识到的。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。