查询词典 oxygen

Multiple-paths hydrogen abstraction reactions of fluorine -with CH_3OH have been investigated at the MP2/6-311 ++ g level. The potential energy surfaces for H-abstraction reaction from carbon atom and oxygen atom were given respectively. The results indicate that there is only one minimum energy path for hydrogen abstraction from carbon atom, while multiple paths were found for hydrogen abstraction from oxygen atom. All the stationary structures, frequencies as well as PES sketch of all channels were given, in which the dominant channel is by a five-member ring transition state. The calculated heat of reaction is 170.62 kj/mol for channel 1, 119.41 kJ/ mol for branch channel 6. The results are in good agreement with experimental data.

以MP2/6-311 ++g水平上详细研究了氟原子与甲醇抽氢反应的多通道反应机理，得到了各条通道中涉及的驻点的构型和振动频率及其能量，给出了两张完整的反应势能面，结果表明，氟原子从C原子上抽氢时有一条明显的最低能量通道，而从氧原子上抽氢时要涉及多条分支通道和多个驻点构型，给出了各分支通道势能面示意图，结果表明以形成五元环状过渡态通道为优势通道，计算得到经途径1生成CH_2OH时反应放热170.62kJ/mol，经分支途径6生成CH_3O自由基时反应放热119.4 kJ/mol，此结果与实验值一致。

For example, in the process of aeration or oxygen exposures, oxygen together with compounds in the sewage generates a different stench; Also, in the anaerobic process, in the role of microorganisms, sulfur from the sewage, reates hydrogen sulfide, mercaptans and sulfide compounds.

例如，在曝气或曝氧过程中，氧气可与污水中的化合物生成有异臭味的产物；又如，在厌氧过程中，污水中的硫在微生物的作用下，生成硫化氢、硫醇和硫醚等化合物。

Objective:To observe the effct of helium-oxygen mixture on vital capacity and to evaluate the theory and application of maximal expiration flow volume curve breathing helium-oxygen mixture.

目的 ：观察氦氧混合气对肺活量的影响，并根据实验数据对氦氧混合气最大呼气流速-容积曲线的理论和价值作一评价。

The analysis of decomposition mechanisms of the catalyst surface revealed that one of the mechanisms is that activated gas phase O2 captures the hydrogen of the organic pollutants to produce free radicals, which then initiate the catalytic reaction, and produce CO2 and H2O ultimately; and the other mechanism is that the activated organic compounds attack the crystal lattice oxygen, which reduces the valances of the transition metals, then the oxidant of the oxygen oxidizes the transition metals to high valances, which realize the self oxidation-reduction of the catalyst.

催化剂表面有机物降解的机理分析表明，一种反应机理为气相中的O2活化后直接夺取有机污染物的氢，产生自由基，并引发催化反应，最终生成CO2和H2O；另一种反应机理为活化后的有机物直接进攻催化剂的晶格氧，并且使得过渡金属由高价态变为低价态，反应气中的O2再将低价态的金属氧化为高价态，实现催化剂自身的氧化还原循环。

This institution also recently invested in the installation of a plant for the disposal of the "environmentally unfriendly" by-products of nutmeg oil processing, which have both a high Biological Oxygen Demand and a high Chemical Oxygen Demand .

最近，这个组织还投资建设了一家工厂，用于处理肉豆蔻精油加工过程中产生的对环境有害的副产品。这家工厂有很高的&生物需氧量&和&化学需氧量&。

This institution also recently invest ed in the installation of a plant for the disposal of the "environmentally unfriendly" by-products of nutmeg oil processing, which have both a high Biological Oxygen Demand and a high Chemical Oxygen Demand .

最近，这个组织还投资建设了一家工厂，用于处理肉豆蔻精油加工过程中产生的对环境有害的副产品。这家工厂有很高的&生物需氧量&和&化学需氧量&。

This institution also recently invested in the installation of a plant for the disposal of the "environmentally unfriendly" by-products of nutmeg oil processing, which have both a high Biological Oxygen Demand and a high Chemical Oxygen Demand.

最近，这个组织还投资建设了一家工厂，用于处理肉豆蔻精油加工过程中产生的对环境有害的副产品。

Most of insects usually don not have the hemcoyte for transporting oxygen, the respiratory of insect is chiefly accomplished by the tracheal system that spreads all over the whole body. Outside oxygen enters the tracheal system through spiracles arranged in two sides of body and is transported through trachea and tracheoles to meet directly the needs of tissues.

一般认为大多数昆虫体内没有运输氧的血细胞存在，昆虫呼吸主要是靠遍布全身的气管系统来完成，O2靠扩散作用由分布于昆虫身体两侧的气门处进入，经气管、微气管的运输而直接给组织供氧。

The effect of micro-orifice spargers on power consumption,gas hold-up ε,oxygen mass transfer coefficient KLα and specific oxygen mass transfer coefficient of power input per volume Eo2 was specially investigated.

着重考察了微孔型分布器对同一组合桨的功耗、气含率ε、氧传质系数KLα以及比功耗传氧系数Eo2的影响，并与传统的环状气体分布器的结果进行了对比。

By using the combustion assistance air with 27%oxygen, an oxygen-firing combustion chamber of a 400 ton/day oil-fueled floating glass furnace is simulated as a practical example.

文中以日产400吨燃油浮法玻璃熔窑为实例，以氧含量为27％的空气作为助燃气体，对重油燃烧火焰空间进行模拟。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。