甲烷

The average methane emission rate in the littoral zone of Huahu Lake, ZoigePlateau is 0.315 mg·m~(-2)·h~(-1), with evident spatial and temporal variations.

若尔盖高原花湖湖滨湿地在植物生长季(6至8月)，甲烷排放平均速率为0.315 mg·m~(-2)·h~(-1)；不同月份间甲烷排放速率存在差异，分别为：-0.054、0.471、0.493 mg·m~(-2)·h~(-1)。

The total analysis time is 20 s at the rate of 10 kHz for mass spectra recording, and detection limits of 10×10^(-6) and 5×10^(-6) were measured for benzene and methyl iodide respectrvely.

用32cm无场飞行管，测量碘甲烷得到的质谱分辨率可达430。在谱图获得频率10kHz的操作条件下，样品总分析时间20s，得到苯和碘甲烷的检出限分别为10×10^(-6)，5×10^(-6)。

The reactions of metal monoxides with methane are summarized in Scheme 1:The initial step of the MO + CH_4 reaction is the formation of the MO(CH_4) complex.

金属一氧化物与甲烷的反应机理可归纳如下：金属一氧化物MO与甲烷反应首先生成络合物OM(CH_4)。

He said global warming could lead to melting of the arctic tundras, setting free large volumes of methane, which would in its turn increase global warming.

他表示，全球暖化融解北极冻土层并导致大量甲烷释出，而这些甲烷将再反过头来加快暖化效应。

The improvement of syngas production process is a very important research field in methane industry...

甲烷制合成气生产工艺的改进是甲烷化工领域重要的研究课题。

Soil moisture is the key factor to control the methane oxidation activity in peat soils from the Zoige Plateau and the oxidation rates of methane in peat soils decreased with soil moisture content.

决定若尔盖高原泥炭土氧化甲烷速率的因素是土壤含水量，土壤含水量越小，土壤氧化甲烷的潜力越大。

The results reveal that under violet ray radiation, the gas sensitivity properties of CeO2 doped ZnO nanowires gas sensor have been increased 300% and 305% for 100 ppm density with CH4 and CO, the response time of CeO2 doped ZnO nanowires sensor have been cut down 3 s and 4 s respectively; the reversion time of CeO2 doped ZnO nanowires sensor have been cut down 2s and 4s respectively.

结果表明，在紫光激发下，CeO2掺杂ZnO纳米线气敏元件对甲烷和一氧化碳的灵敏度分别提高了300%和305%，对甲烷和一氧化碳的响应时间分别缩短了3s和4s；恢复时间分别缩短了2s和4s。

The result showed that the prepared catalyst can be used for naphtha feed at a steam/carbon mole ratio of 1.5～2.5, a inlet temperature of 350～450 ℃, a pressure of 2.0～5.0 MPa and a space velocity of 4.0 h -1 to produce a methane content of 60～65v% gas.

结果表明，该催化剂适于以轻油为原料，在水碳摩尔比 1 。5～ 2 。5、入口温度 350～ 450℃、压力 2 。0～ 5.0MPa和空速 4.0h- 1 的条件下，生成含甲烷为 60 %～ 65%的富甲烷气。

With our own self-devised solubility determining unit, we measured respectively volume solubility of multi-component natural gas, methane, N〓, CO〓 in crude oil.

研究发现，多组分天然气、甲烷和N〓、CO〓在原油中的溶解度随着压力的增加而增大，但天然气、甲烷和N〓增加的幅度越来越小，而CO〓增加的幅度越来越大。

We first stress that our findings are preliminary with regard to the methane emission strength.

最近，科学家们报告说，大气中三分之一的甲烷是由植物排放的，而甲烷是一种强有力的温室气体。

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。