碳化

Over the past four decades, many dearomatization reactions have developed and applied for synthesis of alicyclic compounds con-taining six–membered carboncyclic moieties.

芳香族化合物稳定、易得，通过芳香族化合物的脱芳构化反应，制备官能化的脂肪六元碳环化合物，早以引起人们的广泛兴趣。

In summary, the alkylation performances of isobutane with butene over bothheteropoly acid and zeolite catalysts have been investigated in this thesis, and theresults are helpful for further development of the solid acid catalysts for this process.

通过本论文的研究，对杂多酸和分子筛催化剂的烷基化性能有了进一步认识，能对今后开发固体酸的碳四烷基化催化剂有所帮助和借鉴。

The results indicated that the high level density functional theory calculations can be used to predict the 13C chemical shifts of the modified nanotubes. The calculated results also provided the characteristic chemical shifts values of nitrene (superscript -), carbene (superscript -) and 1,2- and 1, 4-fluorinated nanotubes, which would be helpful for experimental spectrogram assignments. Combined with NMR experiments, these predicted characteristic chemical shifts can be further used to monitor the addition mechanism and the extent of surface modifications on nanotubes.

研究表明高精度的密度泛函理论计算能够用来预测纳米管的13C化学位移，理论研究的结果揭示了氮烯、卡宾以及1，2和1，4氟化的单壁纳米管的若干13C信号特征化学位移值，为实验NMR谱图的归属提供了一定的依据，并且可通过与实验相结合来监测表面官能化碳纳米管加成反应是否发生以及确认其加成方式。

This thesis mainly focuses on the catalytic carbon-carbon bond formation using gold catalysts.

本论文主要是在研究金属金催化剂，催化环化碳-碳键生成的反应。

Lignocellulose is the most abundant biomass in the world, its two major components, cellulose and hemicellulose, are composed of hexoses and pentoses, therefore, lignocellulosic biomass can be a very good feedstock for producing bioethanol and biohydrogen by some microorganisms via fermentation.

木质纤维素是地球上量最丰富的生质物，其所含的纤维素和半纤维素由六碳醣和五碳醣组成，因此若能将木质纤维素分解醣化，它正是用微生物以发酵的方式生产乙醇或氢气的最佳原物料。

With iron carbide, we have grown diamond layers on the surface of diamond and cBN seeds. The iron carbide not only nucleated and formed diamond crystal, but also grown diamond layers on different substrate under HPHT.

以铁碳化合物为原料在金刚石和立方氮化硼籽晶表面外延金刚石的实验表明，铁碳化合物不但可以在高温高压下成核形成金刚石颗粒，而且可以在同质或者异质基底上外延生长金刚石层。

Carbon cations are important organic reaction intermediates,and hydrogen shift is a key path through which carbon cations isomerizes.

正碳离子是重要的有机化学反应中间产物，而氢原子移位则是正碳离子异构化的主要反应途径。

ABSTRACT Appling the numerical model and control theory to the state identification of carbon migration in dissimilar metal weldments , its law and quantitative calculation were researched. Based on analysising of metallurgical and dynamics properties of DMWs, the influences of welding procedure's factors on their high-temperature properties were studied in this dissertation. The following are the main contents.

本文将数值化建模和控制理论引入到异种钢焊接接头碳扩散迁移状态辨识，对碳的扩散迁移的规律及定量计算进行了研究，在对异种接头冶金性能和力学性能进行分析的基础上，对焊接工艺因素对接头性能的影响进行了研究，主要内容如下： 1。

High content of olefin and butadiene in C 4 feedstock and the oxygen compound in the tail gas of MTBE unit are the main constraint factors of alkylation unit and the production cost of high octane gasoline was increased.

经过研究开发，确定了新的碳四加工联合工艺生产高辛烷值汽油的方案，该联合工艺由碳四选择性加氢，MTBE和烷基化装置三部分组成，并在MTBE装置中采用D0 0 5催化剂以及增设甲醇回收系统压力控制技术。

However, the rhodium process with oil compounds encounter problems due to the thermal sensitivity of the high boiling point oxo-products, which cannot be isolated from the homogeneous reaction mixture by distillation.

采用~1H-NMR和FT-IR谱分析了油醇的氢甲酰化反应产物，证实了其结构为甲酰基十八碳醇，且甲酰基的位置可以在主碳链的中间或端位。

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。