氧气

From this perspective, flammable ice can be regarded as the natural gas in the highest purity, and you know, the general state of the natural gas, methane is only about 92% less, in addition to about 3% of the ethane, about 2% of the nitrogen and about 1% of the propane, as well as a very small amount of butane, pentane and oxygen and so on.

从这个角度说，可燃冰可算是自然中纯度最高的天然气了，要知道，一般状态下的天然气中，甲烷大约只占92%不到，此外还有3%左右的乙烷、2%左右的氮气和1%左右的丙烷，以及极少量的丁烷、戊烷和氧气等。

The results suggested that some of the oxygen generated by pericarp photosynthesis remained within the grain.

果皮光合作用产生的氧气主要留在果皮中，用于胚乳的呼吸消耗。

The permeance of water vapor and oxygen were important index whichinfluence the optical and electrical characteristics of the device.

水分和氧气的渗透是影响器件光电性能的重要因素。

The SI unit of permeance is the mol /(m2·s·Pa).

氧气透过量的SI单位为mol /(m2·s·Pa)。

Using the formula , the maximum oxygen pervasion distance of several coal mine is calculated .

，利用该公式计算出氧气在几个矿的松散煤体中的最大扩散距离

Musgrave used Lakatos's methodology of scientific research programmes as the method of reconstruction, and presented the process of how did oxygen theory supplant phlogiston theory afresh.

马斯葛雷夫依据拉氏的科学研究方案为重建方法，将燃素论到氧气理论的取代过程重新呈现。

In sunlight, oxygen, moisture, particularly iron and contacts, the reaction of the highly toxic phosgene.

在日光、氧气、湿气中，特别是和铁接触时，则反应生成剧毒的光气。

HPLC method of determination of CCU has been developed for the kinetic study. The kinetics of photodecomposition of CCU in various carrier gases have been studied. The photoreaction of CCU in nitrogen and air is of the first order, while in oxygen is closer to that of the second order. The rate constants in nitrogen, air and oxygen are 0.00703/h, 0.0109/hand 0.00445 , and the half-livies are 98. 6, 63. 6 and 62. 7hour respectively.

采用以甲醇一水为流动相的反相HPLC作为分析手段，对灭幼脲在不同载气中的光解动力学作了研究，结果表明，灭幼脲在氮气和空气中的光解反应符合一级动力学形式，而在氧气中的光解则更接近于二级反应形式；在三种气氛中的反应速度常数分别为0.00703h〓，0.00109h〓和0.00445h〓〓，半衰期相应为98.6、63.6及62.7h。

The relative concentrations of oxygen and carbon dioxide in the surrounding air determine the balance of photosynthesis and photorespiration and thus the efficiency of carbon fixation .

环境中氧气和二氧化碳的相对含量决定了光合合成和光呼吸的反应平衡和二氧化碳固定的效率。

Photorespiration is a process in which oxygen uptake and CO2 release occur in light. A C3 plant may photorespire as much as 25% of the carbon fixed by photosynthesis, such that engineering photorespiration could improve photosynthesis.

光呼吸 是绿色植物在光下吸收氧气并释放CO2的过程。C3植物光呼吸可消耗掉25％左右的光合产物，故合理改良光呼吸可望提高植物的光合效率。

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。