甲烷

They are less ritualistic than the laws of ch.

他们不太仪式的法律以外的甲烷。

Help Santa deliver the christmas gifts by using his methane converting rocket propulsion p..

帮助圣诞老人转换交付使用的火箭推进第甲烷的圣诞礼物。

The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.

产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17)；同时，将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛，异戊醛和环己醛)的不对称烯丙基化反应，并与广泛应用的Roush配体(22)和Brown配体(27)相比较，发现其立体选择性优于Roush配体，并接近Brown配体，但明显具有可回收利用的优势。

The charomatographic conditions of separation and direct dermination of benzophenone-4(MS40), salizyle acid sodium, salol, benzophenone-3(M40), octyl dimethyl PABA(6007), butyl methoxy dibenzoyl methane(1789), octyl methoxyl cinnamate and octyl salicylate(587) from u-Bondapak C18 Column were studied with methanol-water-THF as elution. A HPLC method for these compounds was founded.

研究了用甲醇-四氢呋喃-水作为流动相，从C18柱上分离和测定羟苯甲酮-5-磺酸(MS40)、水杨酸钠、水杨酸苯酯、羟苯甲酮(M40)、对-二甲酸氨基苯甲酸-2-乙基己酯(6007)、4-叔丁基-4-甲氧基二苯甲酸甲烷(1789)、对-甲氧基肉桂酸-2-乙基己酯、水氧酸-2-乙基己酯(587)等8种紫外线吸收剂的色谱条件，建立了用HPLC测定上述物质的方法。

Because the sapogenin wastewater is highconsistency organic wastewater,we developed the twophase anaerobic digestion with three stages that acidification phase, inner electrolysis phase and methane phase.

开发了三阶段两相厌氧工艺即酸化、内电解、厌氧产甲烷的工艺处理皂素废水。从理论上分析了该工艺处理黄姜皂素废水的机理和优势。在实验条件相同时，改变内电解在工艺中的位置进行间歇式厌氧处理，测得2种厌氧工艺的处理效果。实验结果表明内电解在两相厌氧中间CODC r的去除率要优于内电解在酸化前

The summary of the adopted models contains a two-scale k-ε turbulence model,the scalar joint probability density functiontransport equation approach,the augmented reduced mechanismfor methane oxidation (consisting of 16 species and 12 lumped reaction steps),the Euclidean minimum spanning treesmall scale mixing model etc.

所采用的数学物理模型包括双尺度的k-ε湍流模型，标量联合的概率密度函数输运方程方法，甲烷氧化的ARM简化化学反应机理(包含16种组分，12步总包反应)和欧几里德最小生成树小尺度混合模型。

Nursery stock having worm uses bromic firedamp fumigation, prevent scale insect transmission.

有虫苗木用溴甲烷熏蒸消毒，防止介壳虫传播。

The influences of temperature,scan rate and nitromethane concentration on the electrochemical characteristics of nitromethane were also discussed.

以铂微盘电极为工作电极，采用循环伏安等测试方法研究了硝基甲烷在离子液体1-正丁基-3-甲基咪唑六氟磷酸盐(BMImPF6)中的电化学行为，讨论了温度、扫描速度以及底物浓度等因素对其电化学行为的影响。

"When the temperature is this high, the dominant form of carbon should be carbon monoxide, not methane," says Seager.

西格说：当温度这么高的时候，主要形式的含碳成分应该是一氧化碳，而不应是甲烷。

Alternatively, the methane might simply mean that the planet happens to be very rich in carbon, Seager says.

西格说，或许甲烷的出现仅仅意味着该行星恰巧富含碳元素。

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。