甲烷

Basing on above researches, we designed a series of ionic liquid supported acetylacetone metal catalysts and non ionic liquid supported acetylacetone metal catalysts. The catalytic abilities of these catalysts were evaluated by using them to catalyze the methane oxidation reaction.

在以上研究的基础上，本论文设计了系列离子液体支载的乙酰丙酮金属催化剂及非离子液体支载的乙酰丙酮金属催化剂，并通过这些催化剂对甲烷氧化反应的催化效果来预测它们的活性。

Dichloromethane or chloroform is an appropriate solvent for the acylation reaction when the addition of a solvent is necessary in the some cases.

在需要加入溶剂的情况下，二氯甲烷或氯仿是一种合适的溶剂。

The researchers also tried to find a chemical pathway by which the plants could make methane aerobically.

研究人员也尝试着去寻找植物在有氧环境下制造甲烷的化学机制。

The results showed that under 8% of raw total solids concentration, 6.8-7.4 of pH, the methane tank sludge, 20% of them inoculated, after 30 days of fermentation, it was 9 days of period that the effect was execellent. The total aerogenesis tolerance was 42490.70 mL, the day aerogenesis tolerance was 1416.36 mL, the pit held aerogenesis rate was 0.217 m~3/m~3·d , the stuff held aerogenesis rate was 0.241 m~3/m~3·d, the raw material aerogenesis rate was 0.090 m~3/kg·TS.

结果表明，在原料的总固体浓度为8％、pH值介于6.8～7.4、接种沼气池污泥量为原料干物质重量的20％、发酵周期为30d时，对发酵系统间隔9d换料的效果最好，其在总产气量、日均产气量、池容产气率、料容产气率和原料产气率分别达到了42490.70mL、1416.36mL、0.217m~3／m~3·d、0.241m~3／m~3·d和0.090m~3／kg·TS，都比不换料的对照处理有很大提高，分别提高了153.41％、153.41％、152.33％、153.68％和150％，沼气中的甲烷含量也在70％以上。

The attracting activity of the extracts of withered black poplar leaves: Volatiles from withered leaves of black poplar, extracted by steam distillation and dichloromethane, strongly attract adults of Agrotis, ypsilon, Spodoptera exigua and Herculia glaucinalis in the field bioassay, but are less attractive to CBW.

黑杨萎蔫叶片粗提物的诱虫活性采用水蒸汽蒸馏和二氯甲烷萃取，提取黑杨萎蔫叶片的挥发性物质。

The extraction of organic constituents in four kinds of refinery waste water with CH2Cl2 was conducted in alkalic and acidic conditions, respectively.

对四种炼油污水分别在碱性和酸性条件下用二氯甲烷萃取；采用色谱质谱联机全面分析了萃取物中有机物组

This thesis mainly studied on sulfamic acid catalyzed Cross-Aldol condensation, direct amidation of benzhydryl alcohol; solid base catalyzed synthesis of bisindoles was also discussed.

本论文主要讨论了磺氨酸催化下的Cross-Aldol反应；二苯甲醇的胺化反应；固体碱氟磷灰石催化的双吲哚甲烷衍生物的合成。

It is shown that the samples produced in (H2+ Ar) contains α,while the samples produced in CH4 contains α, Fe3C, Cr3C2, graphite, amorphic cabon, and no oxide appears.

发现（H2+Ar）气氛下制备的不锈钢纳米粒子主要为α；甲烷气氛下制备的粒子由α、Fe3C、Cr3C2、石墨及无定形碳等组成，未发现氧化物。

A In the absence of oxygen, the organic matter is broken down anaerobically to form large amount of toxic and bad-smelling gases such as methane, ammonia, and hydrogen sulphide, the water quality is further deteriorated.

a 在缺少氧气的情况下，有机物质被缺氧呼吸分解为大量有毒而又恶臭的气体，如：甲烷，氨，和硫化氢，这些东西使水质更坏

According to Goodland and Anhang's paper, which has not been peer-reviewed, scientists have significantly underestimated emissions of methane expelled by livestock.

虽未经同行专家严谨审查过，根据古特兰和安汉的报告，科学家们过度低估畜牧业所排放出来的甲烷影响力。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。