氧气

Synthesis of neutral proteinase is strict with solved oxygen in culture medium.

中性蛋白酶的生物合成对氧气的需求比较严格，最适摇瓶装量为50ml/300ml。

The substitution of oxygen for carbon dioxide in the atmosphere, which occurred in the Proterozoic, caused probably by cyanobacteria in the form of stromatolites, caused changes leading to the evolution of aerobic organisms.

发生在原生代的大气中氧气取代二氧化碳，可能是由藻青菌在叠层结构上造成的；大气改变引发的变化，导致了好氧生物的发展进化。

When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water.

当自然的细菌和原生动物在水打破这一有机材料，他们开始使用的氧气溶解于水。

News reports said Adair used about three hundred forty kilograms of nitroglycerine explosive material to pull the oxygen out of the fire.

新闻报道里说，埃德尔用来大约140公斤硝化甘油炸药，使氧气火与或隔离。

Except in the pulmonary vein venous blood is rich in carbon dioxide and poor in oxygen.

除了在肺静脉，静脉血中二氧化碳含量多而氧气含量少。

The pulverizer, but prevents any outside air from entering the

通常情况下，外部空气的氧含量大于循环系统中气体的氧气含量。

A common heating oxidation device(fig.1)is to place a silicon plate in a quartz crystal glass reaction chamber. In the reaction chamber, a electric resistant wire heating device heat up the chamber to a certain temperature(usually, the temperature is 900～1200℃. In a special condition, it can be descended to under 600℃). When oxygen or water vapour pass through the chamber(typical gas flow speed is 1cm/s). A chemical reaction is generated on surface of the silicon plate.

常用的热氧化装置（图1）将硅片置于用石英玻璃制成的反应管中，反应管用电阻丝加热炉加热一定温度(常用的温度为900～1200℃，在特殊条件下可降到600℃以下)，氧气或水汽通过反应管（典型的气流速度为1厘米/秒）时，在硅片表面发生化学反应

An example of irradiation causing an obvious chemical change in food is the inducement of rancidity in foods containing unsaturated fats when oxygen is present. The process is closely related to that which normally takes place when such foods are stored.

辐照导致食品发生明显化学变化的一个很好的例子是，在氧气存在的条件下，辐照会使得含有不饱和脂肪的食品变臭，这一过程与通常食品储存中所发生的变化是密切相关的。

He uses his suit's venting oxygen as thrust to carry him to the nearest Raptor.

他用自己衣服上排除的氧气做推动力够到了最近的猛禽机

It is important to note that DMPS is highly oxygen reactive and is very unstable when exposed to air.

更重要的是要知道DMPS是很容易跟氧气起反应的物质，暴露在空气中时是非常不稳定的。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。