自由氧

探讨了物体的热惰性和绝热效应对焊接的影响，讨论了采用银铜焊料进行氧－乙炔焊时应该运用的火焰和火焰的高温区域.分析了自由氧和自由碳在焊接中的影响。

This paper deals with how thermal inertia and adiabatic effect of an object welding And what flame should be applied in oxy-acetylene welding with silver-copper solder and the high temperature area of flame are also discussed then the effect of free oxygen and free carbon on welding is analyzed .

因为Al与自由氧离子空穴缔合的能力大于Y，所以YSZ的晶粒电导随Al2O3含量的增大而减小。

Because A1 can associate with the oxygen ion vacancy more easily than Y , the grain conductivity of YSZ decrease with content of Al2O3 increasing .

KTB氧枪所供氧气在真空室内与CO气体及钢液发生反应，到达钢液面的一部分氧气被消耗于脱碳反应及增加钢中自由氧。

The oxygen gas supplied from the KTB lance reacts with both CO gas and the molten steel in the vacuum vessel . A part of the oxygen on the steel side is consumed with the decarburization reaction as well as the increasing free-oxygen .

焊条药皮碱度增加，焊接气氛的氧势增加，渣中FeO量增加，渣中自由氧离子活度增加，它们相互作用的结果使熔敷金属中含硫量与焊条药皮碱度呈极小值关系。

With increasing coating basicity , the activity of oxygen ion in slag , FeO content in slag and oxygen potential of arc atmosphere increased . Interaction of them made that relationship between sulphur content in deposited metal and B 1 had a minimum value .

但当自由氧O（4）增加到2时，电导率反而下降，活化能却增加。

However , when the amount of O ~ ( 2 - ) is 2 , the conductivity is reduced , and activation energy is increased .

而无论是消耗于脱碳的那部分氧气、还是用于增加钢中自由氧的氧气的利用率都会随开始供氧时钢液中[C]/[O]的不同而变化。

The efficiency of blown oxygen both on the decarburization and on the increase of free-oxygen in the melt is changed by [ C ] / [ O ] in the melt at the start of oxygen blowing .

自由基氧净电荷对过氧化物引发剂活性的影响

Effect of oxygen net charge of free radical on the reactivity of peroxides

SOD、POD、CAT参与清除自由基活性氧，维持机体自由基活性氧代谢平衡。

SOD , POD and CAT were involved in active oxygen scavening and retain balance of active oxygen metabolish .

同时对损伤过程中产生的羟自由基活性氧进行了鉴定。

Meanwhile we identify the damage process of hydroxyl radicals ros produced .

这些破坏来自被叫做自由基的氧分子，破坏行为发生在正常的人体活动过程中。

This damage is caused by oxygen molecules called free radicals during normal body processes .

羟基自由基活性氧的制备成本不高，在有机废水的处理中较明显的效果。

The cost of the hydroxyl radical activated oxygen production is not high and it has obvious effect in organic wastewater treatment .

这可能是由于气体中的水分子对自由电子与氧原子的消耗造成的；羟基也会与臭氧反应使臭氧分子的分解，分解程度与气体停留时间有关。

The possible reasons are the consumptions of electrons and oxygen atoms by water molecules , and the decompositions of ozone caused by hydroxyl which have something to do with the residence time of gas .

然后研究了用羟基自由基活性氧的制备装置&电催化膜反应器降解苯酚时水中苯酚降解率和羟基自由基活性氧含量随反应时间的变化规律。

Secondly , studies using hydroxyl radical oxygen in the preparation of equipment-electro-catalytic membrane reactor when the degradation of phenol and phenol degradation rate of hydroxyl radical oxygen in the variation of reaction time . 1 .

说明附红细胞体感染后，机体抗氧化能力降低，血浆NO自由基和氧自由基大量蓄积，脂质过氧化反应增强，是造成一系列病理损伤的原因之一。

The results confirmed that eperythrozoonosis can cause the low-antioxidant ability , the exceeding accumulation of the NO and oxygen free radicals , and the strengthening reaction of lipoperoxidation , which is one of the causes of serial pathological lesions .

从反应动力学过程探讨羟基自由基活性氧对有机物的降解，为工业上应用该药剂提高降解反应的效率，降低反应的条件、成本提供了理论依据。

This paper discusses the degradation effect of the hydroxyl radical activated oxygen on reaction kinetics and improving the efficiency of degradation , it provides theoretical basis to reducing the conditions and the costs of reaction for the application in industry .

OH自由基属于活性氧自由基，具有强氧化作用，在生物体内可损伤机体。

OH radical is one of the reactive oxygen species , and is very oxidative .

小脑的DNA损伤可能是因为ACR诱导产生大量的自由基或活性氧，直接攻击DNA导致氧化损伤。

DNA damage may be due to a large amount of free radicals or reactive oxygen species induced by ACR , and free radicals or reactive oxygen species directly attack DNA molecules .

氧化损伤可能介导ACR的神经毒作用，小脑的脂质过氧化损伤可能与结构损伤有关，也可能与自由基或活性氧增多有关。

Lipid peroxidation damage in cerebellum may be related to structural damage or high free radicals or reactive oxygen species .

后通过电子自旋共振实验进一步证实在反应过程中产生烷基自由基和烷氧自由基混合物，且信号强烈，添加DTT和BHT有一定的自由基清除的效果。

The EPR experiment confirmed that alkyl and alkoxyl radical was generated in reaction mixture with intensive signals .

结果提示，氧自由基可能是氧反常损伤的初始原因；

The results suggest that oxygen free radicals might be involved in oxygen paradox injury .

蜂胶对氧自由基和四氧嘧啶致小鼠肝脏损伤的保护作用

Protective effect of propolis extract on activity oxygen free radical and alloxan-induced hepatic injury in rat

证明甲醛可以损伤大鼠自由基和活性氧的清除系统，且对运动染毒组大鼠影响更大。

Proved that the formaldehyde may damage the big mouse free radical and the active oxygen scavenging system , and is bigger to the movement contamination group big mouse influence . 4 .

脉冲频率增加，单位时间内放电次数增加，产生了更多的高能电子、羟基自由基、活性氧和其它强氧化性物质。

When the pulse frequency was increased , the number of discharges per unit time was also increased producing more high-energy electrons , hydroxyl radicals , active oxygen and other strong oxidants .

放疗的主要机制是通过放射线对肿瘤的电离作用，直接或间接诱发自由基、活性氧来杀伤肿瘤细胞。

The mechanism of radiotherapy is its ionization action , which can kill the tumor cell directly or indirectly by generation of free radicals , reactive oxygen species to cure the disease .

本研究结果表明，通过亚慢性毒性实验，吸入一定浓度的甲醛，可明显降低肺组织的抗氧化能力，损伤自由基和活性氧的清除系统，导致肺部的氧化性损伤，引起肺组织病变。

Conclusion : From the experiment , we can conclude that formaldehyde can decrease anti-oxidative ability of mice and damage freebase or active oxygen clearing system , which can cause oxidative injury of lung tissue in mice .

如果在物质氧化产生能量过程中，氧未被完全还原成水，可导致氧自由基的产生，氧自由基也可转变成一些非自由基氧活性物质。

Oxygen-containing free radicals are produced when oxygen is not completely reduced to water in energy-producing oxidation reaction .