Systematic studies on the Hetero-Diels-Alder reaction between the o-Quinone methidesand different enol ether dienophiles for the construction of the spiroketal skeleton was described.
较系统地研究了邻甲基苯醌与不同的烯醇醚亲双烯体之间的Hetero-Diels-Alder反应对螺环缩酮结构的构筑及其应用。
This C-ring synthon willprove be a versatile intermediate for the construction of taxol skeleton analogues.
该C环片断可用来作为合成Taxol骨架类似物的重要中间体。
This thesis is aimming at the synthetic study of Cephalotaxine, construction of Stenine skeleton and consists of the following three parts:In Charpter 1 the isolation, chemical structure identification, biological activities of Cephalotaxine was described and reviewed total synthesis of Cephalotaxine via spiro compound.
本论文以三尖杉碱的合成及百部碱骨架的构筑为研究核心，共分为以下三部分内容。
Leaf blade is the most important part for the building of maize plant architecture, and skeleton construction of leaf midrib is very important for precise descriptions of leaf blade architecture.
叶片是其重要的器官之一，而叶片造型的主要任务是叶片中脉曲线的设计。
It was the first report about the application of Hetero-Diels-Alder reaction for the construction of bis-benzannelated spiroketal skeleton.
这是迄今为止首次将Hetero-Diels-Alder反应用于二苯并螺环缩酮骨架的报导。
Until the 20th cent. there were three great developments in architectural construction—the post-and-lintel, or trabeated, system; the arch system, either the cohesive type, employing plastic materials hardening into a homogeneous mass, or the thrust type, in which the loads are received and counterbalanced at definite points; and the modern steel-skeleton system.
直到20美分。有三个巨大的发展，建筑施工，后和门楣，或trabeated ，系统；拱系统，无论是一致的类型，采用塑料材料硬化成一个单一的质量，或类型的主旨，其中负载收到并在一定的平衡点；与现代钢骨架系统。
Saudi has no applicable setting steel formwork for castinsitu reinforced concrete wall and floor, so the large formwork construction technology of plywood combined with aluminum alloy skeleton is applied.
由于沙特本地没有适用于现浇钢筋混凝土墙体和现浇楼板的定型钢模板，采用胶合板与铝合金骨架相结合的大型模板施工工艺。
Used false ceiling material varieties, specifications, colours and grassroots construction, shall be fixed design methodology, and the current standard; Drop keel no distortion, distortion, false wooden keel or the need for fire wood processing vessel analysis, the installation of a reliable keel, around flattened; light lamps can be directly working in reinforced keel, the weight of more than 2 kilograms of lamps or ceiling fan can not borrow drop keel, a separate hanger with LBAC structure liaison metal materials, synthetic materials, PVC ceiling must be installed on the Xidingdeng Long skeleton, the structure must do waterproofing wood fire.
吊顶 吊顶所用材料的品种、规格、颜色以及基层构造、固定方法应按设计要求，并符合现行标准；吊顶龙骨不得扭曲、变形，木龙骨或木质吊顶必须进行防火处理，吊杆顺直，龙骨安装牢固可靠，四周平直；轻型灯具可直接吊在加固龙骨上，重量大于2公斤的灯具或吊扇不得借用吊顶龙骨，应另设吊钩与土建结构联络，金属材料、合成材料、PVC吊顶上的吸顶灯安装必须有龙骨架，木结构必须做防水防火处理。
In addition, Guangzhou Guangfo line with the integration of rail line network planning, the Guangzhou City Guangfo lines and operations have been completed on the 1st line, second line, 三号线, on the 4th line, and the construction of the fifth line, on the 6th line, to extend the line and on the 8th Line Extension North三号线constitute the metropolitan area rail transit Guangfo the basic skeleton.
另外，将广佛线与广州轨道线网一体化的规划，使得广佛线和广州市已建成运营的一号线、二号线、三号线、四号线，与建设中的五号线、六号线、八号线延长线和三号线北延线共同构成了广佛都市圈轨道交通的基本骨架。
The nature of wood and of steel suggests frame construction-a skeleton to support floors and roof-with whatever surfacing material may be necessary.
木材和钢材的自然属性适用于支撑起楼板和屋顶的构架——框架，当然还需要其他的铺面材料。
Sludge treatment; solidification; silt; skeleton construction; optimization
污泥处理；固化；淤泥；骨架构建；优化
Total synthesis of CET was accomplished by two routes through a conceptually novel strategy featuring a transannular reductive rearrangement as the key transformation for the construction of the core pentacyclic ring skeleton of CET.
我们采用了全新的合成策略，以氮原子参与的跨环还原重排为关键反应，通过两条路线分别成功地合成了三尖杉碱。
How to reformate the executive management and do well in country skeleton organization construction.
人们农村推行农村税费改革变革行政管理体制是现实的选择，和它对对农村基层组织建设的影响与对策。
Ten years later. The people have discovered a corpse in a pile of waste gas's construction. Is relying in the skeleton in the dust ragged clothes pocket's credential.
十年后，人们在一堆废气的建筑中发现了一具尸体，凭借着骨架上尘破衣服口袋中的证件，确认了卡西莫尔的尸体。
The Research has realized the server platform skeleton in the network platform, the website realization, as well as front end active server procedure construction manufacture.
在网络平台实现了服务器平台构架，网站的实现，以及活动服务器前端程序的建设制作。
According to character of steel skeleton plastic clad pipe, it introduces its construction process from electric melting connection、flange connection and metal plastic transition joint connection, application analysis of engineering is done, and indicates its good performance.
根据钢骨架塑料复合管的性能特点，从电热熔连接、法兰连接、钢塑过滤接头连接介绍了钢骨架塑料复合管的施工工艺，并进行了工程应用分析，阐明了其优良的综合性能。
Main skeleton oil seal, valve oil seals, tubing, to round three, take-up of the asbestos mat, overhaul kits, aluminum cylinder miscellaneous pieces of rubber mats, while the new on-line Juan Zhi tetrafluoroethane product line of vehicles for a variety of construction machinery Provide seal products, forklifts, loaders, and so on.
主营骨架油封、气门油封、油管、三向轮、张紧条、石棉垫、大修包、铝缸垫橡胶杂件，同时新上线聚胺脂四氟产品生产线为各种工程机械车辆提供密封件产品，叉车，装载机等。
Traditional measures solve these diseases by using high quality asphalt and aggregate or choosing skeleton dense structure for HMA. All these increase road engineering cost and construction difficulty. The over high road temperature is accepted passively.
传统的解决高温问题的方法是使用高性能的沥青、优质的集料或是骨架密实型沥青混合料，这些方法增加了道路工程造价和施工难度，都被动地接受了过高的路面温度。
This paper is brief expatiate the location of community library as skeleton library:service to community and convenient for denizen, the center of culture construction, information resource and denizen leisure amusement.
它依据人口分布而不是行政区划来设置，具有区域性、全民性、系统性和多样性等特征，是普及科学文化知识和提高全民素质的有效途径之一。
Explains the effective tools that in the construction stage bending moment influence line stiff skeleton of outsourcing concrete.
说明弯矩影响线是劲性骨架外包混凝土施工中索力调整的有效工具。