查询词典 methane

The studies have showed that some geological events, such as Late Palaeocene Thermal Maximum, had possibly related to the decomposition and outgassing of gas hydrate. Except the strong and abrupt methane releasing in the geological history,...

由于天然气水合物中甲烷逸出对全球气候影响的研究刚刚起步，还缺乏海洋沉积物和海水中甲烷传输的恰当模式，甲烷在海水中的溶解度、甲烷的氧化作用及上升流等因素对其的影响程度，以及它对大气甲烷和二氧化碳浓度变化的具体贡献等目前还很不清楚，亟需深化研究。

The mechanism of the dehydrogenation reaction of Os〓 with methane The minimum energy reaction path of this reaction is found not to be one of three PESs of a certain spin state, but to involve the crossings between each two adiabatic surfaces of three spin states.

本文主要用UB3LYP方法，结合相对论赝势，系统地研究了气相Os〓及其氧化物阳离子OsO〓（n=1-3）与甲烷的反应以及气相FeO〓与乙烯的反应的机理。

The mechanism of the dehydrogenation reaction of OsO〓 with methane For the reaction, OsO〓+CH〓→OOs〓+H〓, the minimum energy reaction path involves two PESs of quartet and doublet states.

因此整个反应的速率决定步骤是分子氢从二重态的亚甲基二氢化物中还原消去，能垒大约为30.4kcal/mol.c。

The comprehensive research showed that coalbed methane accumulation is mainly controlled by coal seam thickness ,coal petrological composition,coal rank,adsorbability and good preservation conditions.

综合研究表明：该区煤层气富集的控制因素主要为煤层厚度、煤岩组分、煤级、吸附性能和良好的保存条件。

After this, the experiment proved that why the natural fires occurred over 100 times is that the phosphoreted hydrogen burns itself and ignites the methane.

此后，经过实验证明，原来这是由于磷化氢自燃引燃甲烷所致。

The experts also simulated the phenomenon of natural fire in Luo Maozai's home: the phosphoreted mineral was decomposed into the gas of phosphoreted hydrogen under the condition of bacteria. The gas of phosphoreted hydrogen burns spontaneously under given conditions of moist air and then ignites the methane in the air which comes from the mouse holes.

专家组成功地模拟了罗家的&自燃&现象：含磷的矿物质在有细菌和具备还原性条件下分解成磷化氢气体，而磷化氢气体在一定潮湿的空气环境下自燃，继而引发空气中通过老鼠洞挥发出来的甲烷体燃烧。

"Microbes that produced methane from hydrogen and carbon dioxide were one of the earliest forms of life on Earth," notes Carl Pilcher, Director of the NASA Astrobiology Institute which partially supported the research.

&微生物产生的甲烷，氢气和二氧化碳是最早形式的地球上的生命，&注意到卡尔尔彻主任美国宇航局天体生物学研究所的研究部分支持。

Accordingly, it is very hopeful to use MC1 to degrade cassava residue as a method of prefermentation in methane fermentation.

因此利用MC1分解木薯渣作为甲烷发酵的前发酵手段将很有应用前景。

With 1.3 billion cows belching almost constantly around the world (100 million in the United States alone), it's no surprise that methane released by livestock is one of the chief global sources of the gas, according to the U.S. Environmental Protection Agency … 'It's part of their normal digestion process,' says Tom Wirth of the EPA. 'When they chew their cud, they regurgitate some food to rechew it, and all this gas comes out.

科学世界」在2002年1月21日如此报导：「据美国环境保护局表示：全世界有13亿头牛几乎不断地在打嗝，而牲畜释放的甲烷是全球温室气体的主要来源之一，这没什麼奇怪的…环境保护局Tom Wirth表示：『那是它们的正常消化过程；当它们反刍时，吐出一些食物，再咀嚼它，同时排出所有气体。

Rosolic acid reacted with acetic anhydride to synthesize rosolic acid -triacelate ester [tri(4-acetoxy) phenyl methane] under reflux condition.

以玫红酸、醋酸酐为原料，采用加热回流法合成了玫红酸三乙酸酯[三(4-乙酰氧基)苯基甲烷]。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。