碳化的

Polycarbosilane lower the electronic structure and properties of PCS is a kind of high-molecular compound, the main chain by alternating silicon and carbon atoms of the silicon and carbon atoms are connected to hydrogen or organic group, molecular chains of linear or branch structure.

低聚碳硅烷的电子结构及其性质的研究聚碳硅烷是一类高分子化合物，其主链由硅和碳原子交替组成，硅和碳原子上连接有氢或有机基团，分子链为线形或枝化结构。

The method will involve a sequence of ammonification of glass surface, functionalization of carbon nanotube surface, and bonding between the nanotubes.

将奈米碳管与其它材料以一定的比例复合而制备，进而形成一种具有奈米碳管之复合吸附材料所组成之固相萃取柱介质，其合成步骤包括：奈米碳管表面改质官能化，玻璃粒体之载体氨化及最后将两者经缩合剂作用而产生化学键结使奈米碳管批覆在玻璃粒体之载体上。

The results showed that the initial temperature of methanation is different for the carbonaceous phases with different stability.

研究结果表明，不同稳定性的碳相在氢气氛下的起始甲烷化温度是不一样的，构成碳纳米管主体的六元环的碳，较之类似活性碳的杂形碳以及主要由五元环和七元环构成的碳纳米小颗粒，在氢气氛下是较为稳定的。

The experimental results show that the content of SiC in RBSC increases with carbon content while α-SiC is chosen as a filler. However, the residual carbon would appear in specimens when the carbon content exceeds 30% by weight. Using carbon felt, the reaction-formed SiC particles are small and uniform in size and distribution. However, when carbon felt is impregnated with phenol resin, the reaction-formed SiC is nonuniform in size and distribution. X-ray diffraction shows that the fabricated RBSC is composed of α-SiC,β-SiC, and free Si. The polytype of SiC is related to the reaction-heat during sintering.

结果表明：选用α-SiC+C粉的混合物作为生坯，SiC相的体积分数随生坯中wC的增加而增加，但过大的wC将使硅化后的试样出现残碳；选用碳毡作为生坯，反应烧结碳化硅的显微组织特点是C／Si反应生成的碳化硅颗粒均匀细小，并呈线状分布在游离硅中；浸渍过树脂的碳毡硅化处理后的显微组织特点是反应生成的碳化硅颗粒粗大且呈不均匀分布。X射线衍射结果也表明，反应烧结碳化硅陶瓷由游离Si、α-SiC、β-SiC组成，试样中不同晶型碳化硅的出现与C／Si反应的放热过程有关。

The palladium-catalyzed allylation is a powerful tool for C-C, C-N, and C-O bond formation, which has been widely applied to organic chemistry.

而利用金属钯当作催化剂来进行烯丙基化反应，形成碳-碳键，碳-氮键和碳-氧键，在有机化学中是很广泛的合成方法。

The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本论文的主要工作分为两个部分：一、钯催化下炔烃的反应化学在本小组前人工作的基础上，我们详细研究了炔烃亲核钯化产生的烯基钯中间体与α，β-不饱和羰基化合物的反应，发现两价钯催化下卤离子-炔烃-α，β-不饱和醛酮的串联加成反应、卤离子-炔烃-α，β-不饱和醛酮的西组分串联加成及炔酸分子内氧钯化-串联Michael型加成反应；由此发展了γ，δ-不饱和醛酮、多不饱和羰基化合物和带有醛酮基侧链的γ-丁内酯衍生物的高立体选择性合成方法，这一过量卤离子存在下的烯基钯对α，β-不饱和羰基化合物共轭加成反应的发现，为大量碳-碳键形成反应的实现提供了基础，使我们能够从这一基本反应出发，设计和开发多种分子内、分子间的碳碳成键反应，以好的立体、区域选择性组建开链、环状及多环类型的化合物。

Carbonitriding Carbonitriding, sometimes known as dry cyaniding or nicarbing, is a case-hardening process in which the steel is held at a temperature above the critical range in a gaseous atmosphere from which it absorbs carbon and nitrogen.

碳氮共渗碳氮共渗，有时也称为干法氰化或渗碳氮化，是一种表面硬化工艺。通过把钢放在高于临界温度的气体中，让它吸收碳和氮。

Earbonitriding Earbonitriding, sometimes known as dry cyaniding or nicarbing, is a case-hardening process in which the steel is held at a temperature above the critical range in a gaseous atmosphere from which it absorbs carbon and nitrogen.

碳氮共渗碳氮共渗，有时也称为干法氰化或渗碳氮化，是一种表面硬化工艺。通过把钢放在高于临界温度的气体中，让它吸收碳和氮。

Based on the electron-lattice interaction,Frohlich Hamiltonian and quantization theory are used to deduce the dimerized energy gap and phase transition temperature of carbon nanotube.

依据碳纳米管中电子-声子相互作用的原理，采用哈密顿量、量子化理论推导了二聚化对应能隙和相变温度，在紧束缚近似、量子理论和能带理论的基础上，利用周期性边界条件对碳纳米管Π电子进行了分析，讨论了碳纳米管的导电性，预测了室温下碳纳米管碳管中载流子输运方向

The thesis are divided into two parts. In the first part, we used 2,4,6-trichloro-1,3,5-triazine as the precursor to react with sodium which have been achieved by decomposing sodium hydrate at 623 K. At a low reaction temperature of 623 K, carbon nitride nanosphere、porous carbon nitride material and byproduct sodium chloride, would be produced.

本研究将分成两部份，第一部分是在低温下(623 K)将氢化钠粉末热裂解，生成表面积较大的熔融态金属钠，使气态的氰尿醯氯通入与熔融态金属钠在623 K反应，生成奈米氮化碳球、奈米孔洞性氮化碳材料及副产物氯化钠。

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。