甲烷

In the presence of hydrogen, the effects of electrode material and structure, peak voltage input of the electric fields and feed flow rate on methane conversion, single pass yield and selectivity of C2 hydrocarbons were investigated.

采用新型的旋转电极辉光放电反应器，在常温常压下对辉光等离子体作用下的甲烷转化制C2烃进行了研究。

The results show that the anaerobic digestion can fit for the characteristics of anaerobic fermentation of vegetable wastes. Among inoculums concentrations of 20%, 30% and 50%, the contents of VFA, NH4+-N and pH value for the 30% inoculums concentration were normal, and the total biogas content and the maximum CH4 content were 7790.81 mL and 42.514%, respectively, which were obviously higher than those of other two treatments and control.

结果表明，蔬菜废弃物用厌氧发酵工艺处理是可行的；在试验采用的20%，30%，50%三个水平的接种物浓度中，接种物浓度为30%的实验组的挥发酸含量、氨态氮含量以及pH值都在正常范围内，总产气量和沼气中最高甲烷含量分别为 7790.81 mL和 42.814%，明显高于其他两组及空白组实验。

The results show that coal and gangue are involved in the microbial role; the quantity of inoculums is directly related to the quantities of gas and the contents of methane, at the same time it has a certain degree of impact on the contents of NO(superscript - subscript 3)-N, NH(superscript + subscript 4)-N, S(superscript 2-), SO(superscript 2- subscript 4), and metals; moreover, because of the microbial anaerobic fermentation, the contents of NH(superscript + subscript 3) are seriously substandard; overall, the group B which has a smaller proportion of gangue has a less impact to the environment compared to the group A which has a larger proportion of gangue.

结果表明：煤、煤矸石参与了微生物作用；接种物的加入量与产气量和甲烷含量密切相关，并对硝酸盐氮、氨氮、硫化物、硫酸盐和金属也有一定程度的影响；同时由于微生物厌氧发酵的关系，氨氮严重超标；矸石比例较小的B组对环境的影响略小于矸石比例较大的A组。

It is shown that the formation process of iron carbide converted from hematite using H〓-CH〓 mixtures consists of several steps: reduction of iron ore, cracking of methane, and carburization of metallic iron.

试验发现赤铁矿与H〓-CH〓气反应制备碳化铁的过程是分步完成的，第一步是赤铁矿的还原，第二步是甲烷的裂解，然后是金属铁的碳化。

The reason why no iron carbide was detected in the initial stage of the reaction is that carbon formed from methane cracking was consumed by reduction products H〓O.

对反应过程试样及进出口气体成分分析发现，反应前期无碳化铁生成的原因是甲烷裂解析出碳与还原反应产物H〓O反应而消耗。

With the improvement of Si/Al ratio, total BET surface area decreased and mesopore volume increased, which favored the diffusion of feed/isomerized products, avoided too much secondary reaction and improved the selectivity of isomers.

磷钨酸可以使得分子筛的孔道阻塞，使其内部的酸中心和金属中心无法得到体现，因此，催化剂的金属功能受到限制，烷烃的氢解反应减少，产物中的甲烷和庚烷量下降。

Heat of adsorption of methane on activated carbon was calculated from various methane adsorption isotherms at different temperature.

通过不同温度下甲烷在活性炭上的吸附等温线，计算了等量吸附热、等容吸附热及绝热温升。

The soil temperature at 10cm is significantly correlated with the methane effiuxesin littoral zone of Huahu Lake, Zoige Plateau, and which is one of the most important factors influencing the methane emission from this district.

土壤温度是影响若尔盖高原花湖湖滨不同类型湿地甲烷排放的重要因素之一。

A new type of polyaspartic esters secondary amine called PAE-b was prepared from prime amine 4,4'-methylenebis and dialkyl maleates via a Michael Addition Reaction.

通过伯胺4，4'-二氨基环己基甲烷与马来酸二乙酯的Michael加成反应，合成1种新型聚天门冬氨酸酯仲胺。

The major occupational hazards factors in printing ink were benzene, toluene, xylene, ethylbenzene, solvent gasoline, methanol, alcohol, isopropyl alcohol, ethyl acetate, butyl acetate, butyl acetate, dichloromethane, etc. 10 of 1224 samples (0.82%) exceeded the national occupational health standards.

印刷油墨中存在的职业病危害因素种类主要有苯、甲苯、二甲苯、乙苯、溶剂汽油、甲醇、乙醇、异丙醇、乙酸乙酯、乙酸丁酯、二氯甲烷等，检测样品总数1224件，超标样品数10件，超标率为0.82%。

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。