游离氧

2000Ma之后，大气圈和水圈的游离氧已逐渐增多，CO2的浓度逐渐降低，形成了含氧的大气圈和水圈。

Along with gradual increase of free oxygen and decrease of the density of CO_2 , through 2000 million years ' evolution , the atmosphere and hydrosphere with oxygen had eventually been formed .

游离氧对这一转变起了促进作用。

Free oxygen accelerated this process .

结论麻风杆菌需要靠SOD所产生的游离氧残基来防止宿主的破坏，从而SOD活性降低。

Conclusion That leper needs the free acid residue produced by SOD prevents host 's destruction , result the SOD activity is lower .

多亏有了绿色植物，空气中充满了游离氧。

It is thanks to the green plants that the air is full of free oxygen .

杉木种子萌发期间蛋白质和游离氧基酸的变化与种子活力的关系

Relationship between change in protein and in free amino acid and seed vigor during germination of Chinese Fir Seeds

在与大气和游离氧接触的氧化带中，常形成砷酸盐，而且砷与氢氧化铁一起沉淀。

The arsenate is usually formed in oxidation zones in contact with the atmosphere and free oxygen , and arsenic will precipitate with ferric hydroxide .

因此，控制系统泄漏和原料中的游离氧，平稳操作防止局部超温，以及及时检修水冷器管束泄漏是非常重要的。

Therefore , it is critical to control the system leakage , free oxygen in the feed and local temperature over-run and have a good maintenance of heat exchange equipment .

这主要是由于铁炉渣添加抑制了甲烷产生同时增加了土壤氧化层附近的游离氧，促进了甲烷氧化所致。

This is mainly the inhibition of iron slag to add methane production while increasing the free oxygen of the oxide layer in the soil nearby , promoting methane oxidation due .

注水、石灰水及其他阻化剂的阻燃方法忽视了水溶液中游离氧在硫化矿物氧化过程中所起的巨大作用，因而收效甚微。

The combustion resisting methods of injecting water , lime water and other react resisting agents failed to play a good role in extinguishing fire because the role of isolated oxygen in liquid was not considered .

这些游离的氧原子能维持它们自己的形式或者和氢原子联合成活性氧（ROS），ROS能被酶和蛋白分解可逆性影响细胞功能。

These rogue oxygen atoms can remain on their own or combine with hydrogen atoms to form reactive oxygen species ( ROS ), which wreak havoc with enzymes and proteins and adversely affect cell function .

3000×g处理组的根系活力、游离脯氧酸含量、超氧化物歧化酶（SOD）活性显著高于2000×g处理，4000×g与3000×g处理间差异不显著（SOD除外）；

The roots activity , content of free proline and activity of superoxide dismutase ( SOD ) of seedlings under 3000 × g treatment are significantly higher than those under 2000 × g , and the difference between 4000 × g and 3000 × g is not significant except SOD .

该机理为：第一步，氧气吸收光子形成游离态氧原子，每摩尔氧气吸收1摩尔光子；

The first step , oxygen molecules absorbed photons to form oxygen atoms , 1 mol oxygen molecules absorbed 1 mol photons ;

数十年前，生理学家们发现新陈代谢过程中，氧分子（O2）会裂解成游离的单个氧原子。

Decades ago , physiologists discovered that during metabolism , oxygen ( O2 ) can split into single oxygen atoms , known as free radicals .

急性心肌缺血再灌注时中性粒细胞胞浆游离钙和氧自由基的变化

The Changes of Cytoplasmic Free Calcium and Oxygen Free Radical of PMN after Acute Myocardial Ischemic Reperfusion

研究结果表明：①利用游离氨和溶解氧对硝酸菌的选择性抑制，通过高的NH3-N浓度和低的溶解氧浓度，可培养出亚硝酸菌为优势菌的活性污泥。

Experimental results demonstrate ( 1 ) With the selective inhibition of free ammonia and dissolved oxygen on nitrate bacteria , the activated sludge predominated by nitrite bacteria may be obtained when the concentration of NH3-N is high and the concentration of dissolved oxygen is low .