查询词典 Oxygen

Because of the high diffusivity and solubility of oxygen in Ti〓Al, once the oxidation layer loss its protection, oxygen can easily enter into the alloy and thus considerable oxygen contaminated region is formed, which would embrittle Ti〓Al alloys and seriously decrease their thermal stability and high temperature properties.

氧在Ti〓Al基合金中具有较高的固溶度，当表层氧化膜缺乏保护性时，氧得以在合金基体表面部分形成厚度可观的氧污染层，使本身塑性就较差的Ti〓Al基合金脆化，从而严重影响Ti〓Al基合金的热稳定性和高温力学性能。

The present paper describes the effect of the ethine absorbed and solved in the liquid oxygen on the liquid oxygen in the main condenser-evaporator since revamp of the air separation unit with liquid air and liquid oxygen absorber into the air separation unit with molecular absorber as well as measurement of the ethine content.

阐述空分设备由一般的液态空气吸附器和液态氧吸附器改造为分子筛吸附器后，吸附溶解在液态氧中的乙炔对主冷液态氧的影响程度及乙炔含量的检测。

People always thought oxygen is beneficial hurtless to human body in the past, but from discovery SOD is had cleared exceed oxide after the action of freedom radical, the certain metabolization product that discovers oxygen (O2 ˙ or HO2 ˙, H2O2 and ˙ OH) and the active material of its ramification if fat kind cross oxidation child and single-track condition oxygen (˙ O2) can injure airframe.

过去人们总认为氧对人体是有益无害的，但自发现SOD具有清除超氧化物自由基的作用以后，发现氧的某些代谢产物（O2˙或HO2˙、H2O2与˙OH）以及其衍生物的活性物质如脂类过氧化产物与单线态氧（˙O2）可损伤机体。

During the actual production, that the oxygen contamination from the crucible material by heat composition increases the oxygen content of molten steel will result in melting losses of the alloys in the molten steel, and will results in more heavier melting losses of the alloys, incontrollable exact chemical content of molten steel, increment of oxide inclusions and bad processability and serviceability, especially in the high strength(σb≥1600MPa) steels and alloys with special performance used in aerospace industry, manufacturing industry for precision instruments and meters, military industry, nuclear industry etc. because these steels usually have a high content of some active alloys such as Ti, V, Nb, Al, RE, etc. and a nearly zero content of dissolved oxygen.

实际生产中，如果炉衬热分解向钢液供氧，势必会造成钢液中合金元素的烧损，尤其是在航空航天、精密仪器仪表制造、军工及核工业部门使用的某些具有特殊性能的高强度(抗拉强度σb≥1600MPa)合金或钢材，因它们通常需要具有较高的活泼合金元素(如Ti、V、Nb、Al、RE等)含量，且钢中溶解氧含量接近于零，炉衬热分解供氧将造成这些合金元素的大量烧损，其结果是钢液化学成分难以精确控制，并增加了氧化物夹杂含量，恶化了钢的加工和使用性能。

In the oxygen steelmaking processes, material from the blast furnace saturated with carbon is placed in a vessel capable of holding some 100 ~ 300 t of hot metal. Oxygen is then lanced from above the bath for about 15 min, or alternatively a mixture of oxygen and propane is blown up through tuyeres in the bottom of the vessel (bottom-blown).

在氧气炼钢工艺中，把来自于高炉的含饱和碳的铁水兑人一个容量约为100一300吨的转炉中，然后用氧气从金属熔池上面向熔池喷吹约I5分钟，或者通过熔池底部喷嘴喷入氧气和丙烷的混合气体。

To verify the accuracy of CFD simulations, experiments were carried out. The results of simulations with user defined function of the effects of impeller type and stirring rate on the velocity field were in good agreement with the output of particle image velocity. The oxygen mass transfer model can be used to predict the process of oxygen mass transfer in a vessel, and the logarithmical expression can successfully describe the relation between the oxygen concentration and the dissolution time.

结果表明，(1)采用Fluent软件并结合用户自定义方程(user defined function， UDF)能够很好地模拟出实际搅拌器内流场分布，模拟结果与采用粒子成像技术(particle image velocity， PIV)的实验测量结果相符；(2)采用氧气传质模型能预测氧气在搅拌器内的动态传质过程，同时氧气浓度与溶解时间的对数关系式能较好描述试验搅拌器内氧气动态传质过程；(3)在相同搅拌速度下，圆盘涡轮式搅拌器产生的湍流动能分布范围要大于桨式搅拌器产生的湍流动能，而且湍流动能分布更均匀，湍流强度更大。

The chemical analysis result of modified lignin by alkaline-oxygen treatment is as following:The chemical analysis result of modified lignin by alkaline-oxygen treatment showed that the carboxyl group of modified lignin increased, since muconic acid type structure were generated from phenolic structure by ring-open reaction during alkaline-oxygen treatment.

氧碱处理改性木素的化学分析结果见下表；┌────┬────┬─────┬────────────────┬────┐│改性本素│OCH_3│总糖│C_9单元式│COOH │├────┼────┼─────┼────────────────┼────┤│O_4 │8.49 │0.07 │C_9H_(10.45)O_(3.7)(OCH_3)_(053)│10.82 │└────┴────┴─────┴────────────────┴────┘氧碱处理改性木素的化学分析结果表明，改性木素的羧基含量明显增加，在氧碱处理的过程中，由于芳环的开裂，(来源：ABCe6论6d文网www.abclunwen.com)形成了己二烯二酸结构，因此改性木素具有较高的反应活性，易与Al~(3+)形成络合。

Results Oxygen metabolism abnormality was found after trauma, and it was correlated with ISS, RTS, injured organ or region and number of injured organs, shock, systemic inflammatory response syndrome and respiratory complications. It was more intense in the patients with MODS. There was marked difference in the ratio of change in oxygen metabolism between MODS and NMODS groups. Oxygen deficiency metabolic variables tended to deteriorate in the nonsurvival group. More marked changes in metabolic variables indicated severer organ dysfunction, reaching their peak values before death.

结果 氧代谢水平在创伤后即发生异常，与创伤严重度评分、RTS、损伤器官部位与数量、低血容量性休克、全身炎症反应综合征以及是否并发呼吸系统合并症等有关；并发MODS患者氧代谢水平变化更为明显，与轻伤对照组和NMODS组比较相关氧代谢比值改变差异均有显著性；死亡组乏氧代谢指标常呈持续恶化趋势，其代谢水平改变越显著，预示器官功能损害程度越严重，往往于死亡前达到峰值。

It is concluded that raising content of oxygen in platelet plasma can provide more oxygen to compensate oxygen supply deficiency for platelet metabolism and improve the efficiency of platelet oxygenic metabolism and the quality of platelet during preservation.

提高血小板血浆中的含氧量可弥补保存袋中血小板代谢的供氧不足，提高血小板的有氧代谢和血小板的保存质量。

It indicate that 200μmol/m2s and 80μmol/m2s low light cause reactive oxygen species quick producing and SOD and CAT acticity enhance, but the latter's increasing cann't offset reactive oxygen species'quick producing, which lead to membrance peroxidize injury on peach tree. 30μmol/m2s low light's injury on peach tree mainly because reactive oxygen species'accumulation.

表明200μmol/m2s和80μmol/m2s的弱光下桃树抗氧化酶活性的诱导提高不足以抵消弱光下自由基的快速生成，从而导致对桃树细胞膜脂的伤害；30μmol/m2s的弱光下桃树活性氧的快速生成加剧膜脂过氧化程度，是造成弱光对桃树伤害的重要原因之一。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。