结构化

We investigated constituent of triterpenoid saponins ofAlbizzia, two new compounds together with two known compounds were isolated from Albizzia julibrissin Durazz. by using column chromatography (macroreticular resin, silica gel, Sephadex gel, reverse phase silica gel),preparative HPLC methods et al.On the basis of spectroscopic analysis, including IR,ESI-MS,~1H-NMR,~(13)C-NMR,HMBC,HMQC,~1H-~1HCOSY and chemical methods, the structure of two new compounds were identified as 3 - O -[β-D-xylopyranosyl(1→2)-β-D-fucopyranosyl (1→6)-β- D -2- deoxy - 2 - acetoamidoglucopyranosyl] -21-O-[(6S)-2- trans- 2,6-dimethyl - 6 - O-β- D - quinovopyranosyl -2,7- octadienoyl] - acacic acid- 28 - O-β-D-glucopyranosyl(1→3)[α-L-arabinofuranosyl(1→4)]-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside acacic acid 3- O -β- D- glucopyranosy(1→3)-β- D- fucopyranosl(1→6) [β-D- xylopyranosyl (1→2)]-β-D-glucopyranoside ;two known compounds were acacic acid lactone 3- O -β-D- xylopyranosyl-(1→2)-β-D-fucopyranosl (1→6)- 2-deoxy -2 -acetoamido -β-D- glucopyranoside ; acacic acid lactone 3- O-β-D-xylopyranosyl(1→2)-α-L- arabinopyranosl (1→6)- 2- deoxy - 2- acetoamido -β-D-glucopyranoside . The study lays chemical foundation and chemical reference substance for enhancing quality standard of Albizzia julibrissin Durazz.

本研究论文在综述国内外对合欢属Albizzia三萜皂苷化学成分和药理作用研究进展的基础上，利用传统植化分离手段和现代分离技术，包括大孔树脂、硅胶、葡聚糖凝胶、反相硅胶等柱色谱，制备高效液相色谱法等技术从中药合欢皮中分离得到了4个化合物，其中，2个新化合物和2个己知化合物，并进一步通过现代分析技术IR，ESI-MS，~1H-NMR，~(13C-NMR，HMBC，HMQC，~1H-~1HCOSY等和化学方法鉴定了2个新化合物的结构分别是：3-O-[β-D-吡喃木糖基(1→2)-β-D-吡喃夫糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖基]-21-O-[(6S)-2-反式-2，6-二甲基-6-O-β-D-吡喃鸡纳糖基-2，7-辛二烯酸基]-金合欢酸-28-O-α-L-呋喃阿拉伯糖基(1→4)[β-D-吡喃葡萄糖基(1→3)]-α-L-吡喃鼠李糖基(1→2)-β-D-吡喃葡萄糖苷，金合欢酸3-O-β-D-吡喃葡萄糖基(1→3)-β-D-吡喃夫糖基(1→6)[β-D-吡喃木糖基(1→2)]-β-D-吡喃葡萄糖苷；2个已知化合物结构分别是：金和欢酸内酯3-O-β-D-吡喃木糖基(1→2)-β-D-吡喃夫糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖苷，金和欢酸内酯3-O-β-D-吡喃木糖基(1→2)-α-L-吡喃阿拉伯糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖苷。

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。

By observing and analyzing 3D structure of apple flower and inflorescence, we raised the 3D structure mathematical model of anthocaulus, receptacle, calyx, petal, androecium and pistil.

为了实现对苹果花及花序三维形态结构的交互设计、几何建模和真实感现实，提出了精确描述苹果花序三维形态结构的数学模型及可视化方法。

It is shown experimentally that graphite layers in CNT can grow and form annual ring structure with the better crystallization degree at high temperature.

实验结果及理论分析表明，高温下碳纳米管管壁中的石墨层片易于形成自组建的封闭结构，最终形成晶化较好的同心圆柱形结构。

And the lattice distance expands anomalously with decreasing particle size. Using the model of long-range interaction and its cooperative phenomena altered by particle size, the size-induced cubic-tetragonal phase transition, the anomalous lattice expansion, and the change in chemical bonding characters have been well understood.

采用长程相互作用的晶粒尺寸效应模型，对钛酸钡纳米晶结构相变、晶格间距异常增加、价键性质变化等实验现象给出了合理的统一的解释；并把该模型扩展到解释与钛酸钡晶体具有不同共价性成分的氮化镓等纳米体系的相变以及晶格结构变化现象。

The standardized, modular, integrated, networked nature must be the latest development trend of todays testing and measurement system. In traditional measurement system, the architectures are overcomplicated, the functionalities are not opened, and the resources are not shared. Virtual instrumentation and networked measurement provide the best solutions to these problems above.

测试系统正朝着标准化、模块化、集成化和网络化的方向发展，传统测试系统中存在结构复杂、功能不开放、数据不能共享的问题，虚拟仪器和网络化测试概念的提出为解决这些问题提供了可能性。

After doing this, this chapter, by the interpretation of the technical separation of occupation and ownership, and the legal nature of traditio, historically explains the dual structure in the transition from jus civile to jus gentium and the cause of the relativity of the absolute ownership, which is factually caused by the lack of the Principle of Publication in the Roman Law.

尤其是通过占有和所有在法律技术上的分离以及对&交付&法律性质的阐释，解释了在市民法向万民法过渡时期出现的所有权二元结构以及绝对性所有权的相对化的原因，指出罗马法物权公示制度的缺乏正是其绝对性所有权相对化的真正原因。

The key to success for design optimization is to define the model parametrically and to form a correct analysis file, this thesis has discussed the details and notices of parameterized modeling as well the creating of analysis file, which would be helpful for structure optimization designer.

优化设计成功与否的关键是参数化建模与形成分析文件，本文详细讨论了参数化建模的细节与注意事项以及分析文件的形成，为结构优化设计人员提供帮助。

Deep discontinuity presents itself mostly in cultural structure, concepts of value, religion, consciousness and unconsciousness, as a result of long process of enculturation and acculturation of ethnic identity in particular kind of social context. A symbol of cultural identity can be discovered in the context in which cultural discontinuity takes place.

而深层文化中断多表现在文化结构、价值观、信仰、意识与无意识等方面，它是一种文化特定内涵与族群认同长期濡化与内化的结果，透过文化中断的表现场景可以发现作为某一族群成员的文化身份的标志与象征。

Seven type II UV absorbers of benzotriazol structure were prepared by diazotization,coupling,reduction and alkylation.Their structures were characterized by IR,MS and elem entary analysis.

通过重氮化、偶合、还原和烷基化反应合成了7个I型苯并三唑类紫外线吸收剂，并经红外光谱、质谱、元素分析等手段确证结构，其中6个为新化合物。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。