甲烷

These two PESs may have two possible spin crossings at entrance and exit channels, respectively, and the minimum energy path is suggested to be 〓〓〓 H〓O.

OsO〓与甲烷的脱水反应机理此反应的极小能量反应路径只与四重态和二重态两个自旋态的势能面有关。

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。

In this work,the new kind of polyurethane have been prepared from Bis(4—β—hydroxyphnyl)sulphone,polyhydrofuran, 4,4′—di—phenylmethane diisocyanate,by one—step reaction metho -d and block copolymerizatiano.

本文用一步反应法，由双(4-β-羟基乙氧基苯)砜，聚四氢呋喃，4，4′—双苯基甲烷二异氰酸，采用嵌段共聚法，制成了一种新型聚氨酯。

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。

The UV-vis absorption and photoluminescent spectra of the systems in n-hexane, tetrahydrofuran, and CH2Cl2 are investigated.

并用UV-vis和PL测定了此类化合物在正己烷、四氢呋喃和二氯甲烷不同极性溶剂中的发光性能。

"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。

A new method for the total analysis of the polybasic acid s and higher fatty acids in hawthorn fruit by gaschromatography-mass spectrometrywas developed.

采用硫酸甲酯化处理山楂果样品，二氯甲烷作萃取剂，用气相色谱-质谱联用法对山楂果中的多元酸和高级脂肪酸进行了全面分析。

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。

Effect of Ni loading, prereduction and reaction temperature were studied.

甲烷二氧化碳重整制合成气近年来引起学术界和产业界的广泛关注，但该反应是强吸热反应，能耗大并且催化剂易于积炭，因此限制了该工艺过程的工业应用[2，3]。

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。