碳化的

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。

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。

According to the deterioration mechanism of concrete, the model of life perdiction in the corrosion form of corrosive medium and high heat were based on the penetration of chloride with the rustiness of steel and the carbonization of concrete with the rustiness of steel. The calculation results of service life of the origin concrete and new mending materials were close to the actural phenomenons.

根据两种腐蚀形式的劣化机理，建立以氯离子渗透和钢筋锈蚀以及温度影响下的混凝土碳化和钢筋锈蚀为主体的钢筋混凝土使用寿命预测模型，并分别对原有材料和新修补材料进行使用寿命预测，预测结果与实际工程相吻合。

The factors include the calefactive process of stabilization,the temperature of carbonization and the condition of activation craft.

通过红外光谱和DTA/TGA分析对ACF的结构变化进行了探讨，并考察了稳定化升温程序、碳化温度及活化工艺条件等对ACF吸附性能的影响。

Nano particle after being dispersed fully is added into A1, TiO2 and C powder in the suspension, and through fully mixing and combusting composition, loose blank of nano composite Al2O3-TiC base ceramic is obtained; and the blank is crushed, ball milled and hot pressed to densify, nano composite Al2O3-TiC base ceramic is obtained, which ontains Al2O3 40-55 wt%, TiC 25-48 wt%, nano phase 0.1-25 wt% and sintering assistant 0-2 wt%.

以重量百分比计，将纳米粒子充分分散后，以悬浮液的形式加入Al、TiO2、C粉末中，经充分混合后进行燃烧合成，得到Al2O3－TiC基纳米复合陶瓷的疏松坯体；将燃烧合成所得的坯体破碎、球磨后，进行热压致密化处理，制得含有三氧化二铝40.0－55.0％，碳化钛25.0－48.0％，纳米相0.1－25.0％，烧结助剂0－2.0％的Al2O3－TiC基纳米复合陶瓷材料。

The influence of the change of the pH value and viscosity as well as the impact of aging and adding crystal shape control agents on the crystal shape of nano-sized calcium carbonate in the carbonization process was studied.

研究了碳化过程中粘度和pH的变化，以及陈化和添加晶形控制剂对纳米碳酸钙晶形的影响。

In this paper several technologies, such as Fourier transform infrared spectroscopy, elemental analyzer, wide angle X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and high resolution transmission electron microscopy were used to systemically investigate the evolution of crystal structure, chemical structure, microstructure and properties of wet-spinning and dry-jet wet-spinning PAN precursor fibers during proxidation and carbonization process, analysis the structural change of carbon fibers during graphitization, and discuss the correlation between the structure and properties.

本文采用傅里叶变换红外光谱、元素分析仪、X射线衍射仪、场发射扫描电镜、透射电镜以及高分辨透射电镜等测试技术，分别系统研究了湿纺原丝和干喷湿纺原丝在预氧化和碳化过程中纤维晶体结构、化学结构、微观结构和力学性能的演变规律，分析了碳纤维在石墨化过程中的结构转变，并对碳纤维结构与性能的相关性问题作了探讨。

In this paper boron-doped diamond single crystals was synthesized at high pressure and high temperature with iron-based catalyst doped with B4C, h-BN and Na2B4O7. The effects of multiple boron sources on diamond were studied according to the characterization of structure and properties of the boron-doped diamond.

本文使用碳化硼、六方氮化硼和硼砂三种硼源材料复合添加的铁基触媒在高温高压下合成含硼金刚石，通过对金刚石结构与性能的表征，探讨多种硼源复合添加对含硼金刚石的影响。

Wedgeplug O-Seal plug valves with their positive, no-leak features are not only recommended as the best general purpose valves for handling hydrocarbons, vegetable oils, solvents, etc., but are ideal for such tough service as butane, propane, butadiene, acetone, ethyl alcohol, ammonia, anhydrous ammonia, benzene, vinyl chloride, dry chlorine, Dowtherm, ethane, ethylene, hydrogen chloride, napthalene, oxygen, hydrogen, phthalic anhydride, dry phosgene, phosphoric acid, potassium carbonate, styrene, molten sulphur, sulphur dichloride and related services within a temperature range from -300oF to + 450oF within pressure limits of the valves.

楔塞O形密封旋塞阀具有积极的、无泄漏特性，不但是最好的通用的阀门，用于处理碳化氢，植物油，溶剂等，还特别适用于严酷的应用环境，如丁烷，丙烷，丁二烯，丙酮，乙醇，氨，无水氨，苯，氯乙烯，干氯，道氏热载体，乙烷，乙烯，氯化氢，萘，氧，氢，邻苯二甲酸酐，干碳酰氯，磷酸，碳酸钾，苯乙烯，融化硫，二氯化硫，以及温度在-184oC至232oC之间，压力在阀门额定压力等级范围内的有关应用。

To investigate the wear mode of the silicon nitride balls in lapping process, a series of abrasion tests were carried out on a ball-plate wear test apparatus with different loads, abrasive girt diameter, and slurry concentrations.

为掌握不同研磨条件下氮化硅(Si3N4)陶瓷球表面的磨损形式，在球－盘式磨损实验装置上，采用不同载荷及磨料粒度和浓度的碳化硼(B4C)磨料进行了磨损实验。

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。