查询词典 O2

In this research, we employed shoot-tips of wild Chinese tulip tree in Mount Emei as explants for tissue culture, and mesured the content changes of super oxygen-anion free radicals O2(superscript -, hydrogen peroxide (H2O2) and malondialdehyde during the secondary culture.

本研究以峨嵋山野生鹅掌楸茎尖芽为外植体进行组织培养，并对其继代培养再生过程中超氧阴离子自由基O2 (上标-、过氧化氢(H2O2)和丙二醛含量的变化进行了测定。

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。

Atmospherical plasma jet carries to the surface modification of tungsten oxide nanorod. The results showed that the modified use of plasma gas (O2), in the same distance to increase deal with test-chip of the surface then there is the formation of small particles with the trend, and in the higher distance to some deal with test-chip of the trend of the formation of small particles lower. N2 was more significant than that of Ar plasma for surface modification, and the test piece is somewhat part of the surface nano-rods box integration with the formation of small particle side of the box there is scheduling a clear rod-like.

本研究应用常压低温电浆设备对氧化钨奈米棒进行表面处理，其改质结果显示使用电浆气（O2）下，在一样的高度距离下随了处理次数的增多，试片表面随之融合一起有形成小颗粒的趋势，且在一样的次数下随了距离高度越高其形成小颗粒的趋势越低；在使用电浆气体为N2与Ar下，电浆气体N2比Ar有较大幅度的电浆表面处理，且试片表面有些许部分奈米棒融合一起形成小方块颗粒其方块颗粒侧边有明显的棒状排立。

In the present study, tungsten oxide nanomaterials were synthesized by a modified plasma arc gas condensation technique. The effects of the plasma currents (70~90 A), chamber pressures (200~600 torr), production time（3~12 min）, oxygen partial pressure Ar:O2（1~6:1）and plasma including the hydrogen（0~10 %）on the preparation of tungsten oxide nanostructures were investigated. Pre-treatment on the tungsten oxide nanorods for surface modification was investigated by atmospherical plasma jet. The optical, filed emission, and gas sensing characteristics of tungsten oxide nanopowders were also examined.

本研究系利用电浆电弧气凝合成法来制备氧化钨奈米材料，分别探讨不同腔体压力（200~600 torr）、电浆电流（70~90 A）、制备时间（3~12 min）、氧分压Ar：O2（1~6：1）、电浆气含氢量（0~10 %）对於产物的形貌、相态影响，并使用常压低温电浆设备对氧化钨奈米棒进行表面处理，且针对氧化钨奈米材料的光学、场发射以及使用自行组装气体感测量测设备量测其气体感测特性。

When it passed over the surface of TiO2-Y2O3 with the mass ratio of 3∶1, methanol gas was catalytically oxidized by O2 in air that resulted in intensive chemiluminescence. A novel methanol gas sensor based on this kind of CL was developed.

发现当甲醇气体通过TiO2-Y2O3 (质量比为3∶1)粉体表面时，可被空气中的O2催化氧化产生强烈的化学发光，基于此研制了一种新型的甲醇气体传感器。

Compared to WT, the sense-transgenic lines could maintain higher activities of chloroplastic SOD and APX, lower content of chloroplastic O2(superscript -) and H2O2 under salt stress.

与WT相比，盐胁迫下转正义基因植株维持较高的叶绿体超氧化物歧化酶和抗坏血酸过氧化物酶活性，O2和H2O2的含量较低。

I had purchased the Cingular O2 8125 PDA phone a fortnight back and I have found that it is a wonderful piece of instrument to own.

我曾购买Cingular的O2的8125 PDA手机两星期回，我发现这是一个美好的一块文书，以自己的。

With the phenol sulfuric acid method determines Cynomorium songaricum Rupr polysaccharide, OH was produced by Fenton reaction, and O2(superscript -) was produced by the oxidation of pyrogallic.

实验中采用苯酚－硫酸法测定锁阳多糖，在自由基由Fenton体系产生，超氧自由基O2(上标-由邻苯三酚自氧化体系产生。

METHODS: Newborn rats in the model and laser treatment groups were treated with low-concentration oxygen (containing 8% O2 and 92% N2) following deligation of the left common carotid artery to establish models of ischemia-hypoxia brain damage. Rats in the sham operation group did not receive deligation of the left common carotid artery, but exposed to the air.

模型组、激光治疗组新生大鼠通过结扎左颈总动脉后，再吸入低浓度氧(含体积分数为8%的O2、体积分数为92%的N2)建立缺血缺氧性脑损伤模型；假手术组不结扎左颈总动脉，置于正常空气中。

Be like: Predestined relationship of ⑿ of Yong of ㄑ buzzing Yi suckles the dug of arrogant?CO2 and NaOH solution reaction, content of the O2 in air measures decided experimental dug, hydrochloric acid makes purple Shi Rui tries the dug with erubescent fluid to wait.

浓盐酸挥发性的探究，CO2和NaOH溶液反应的探究，空气中O2含量测定的实验探究，盐酸使紫色石蕊试液变红的探究等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐