查询词典 skeleton layout

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。

Sludge treatment ; solidification ; silt ; skeleton construction ; optimization

污泥处理；固化；淤泥；骨架构建；优化

In Hongfenghu long Span Bridge construction, stiff skeleton method is adopted to implement closure of main span and side span, by taking a series of measures to assure construction quality,the safe of structure stress and the easement of main beam alignment are assured in the course of closure segment construction.

红枫湖大桥采用劲性骨架法进行边跨和主跨的合龙，并通过采取了一系列确保合龙段施工质量的措施，保证了合龙段施工过程中结构受力的安全和主梁线形的平顺。

It has clear skeleton and construction with inclining head, big and black eyes, hang-down eyelid, concave-down face, broad nostrils, long mouth.

低下的马头，大而黑的眼睛微微低垂的眼皮，下凹的面部。宽大的鼻孔，和长长的嘴，骨骼、结构清晰。

The regioselectivity of primary aminyl radical cyclization was first investigated in this dissertation. The total synthesis of 14-Aza camptothecin was then achieved on the basis of our investigation in the construction of pyrimidin-4-one skeleton via [4+2] strategy.

中文摘要本论文首先探讨了伯胺氮自由基环合反应的区域选择性，然后应用[4 + 2]策略对吡咯并嘧啶-4-酮的合成方法进行了研究，并在此基础上完成了14-氮杂喜树碱的合成工作。

With L-DOPA as the starting chiral phenylalanine derivatives, construction of the skeleton of Phthalascidin was studied. Firstly, starting from L-DOPA and 3,4-dimethoxyphenylalanine, an amide 〓 was obtained, and a modeling cyclization reaction was carried out but failed to give the anticipated product.

二、对由苯丙氨酸甲酯衍生物通过Bischler-Napieralski反应合成四氢异喹啉—3—甲酯进行了研究，通过研究首次发现，生成苄基噁唑的反应是正常的B-N反应的竞争性反应，并从机理上给予了解释，所得出的结论具有一定的规律性，在杂环的合成方面具有一定的应用价值。

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。

Through the assimilating and analyzing the construction materials and the design of reinforced concrete arch bridges with long span from both domestic and abroad, the thesis studies the effect of the arch axis geometry, rise-span ratio, arch ring section and spandrel structures, as well as the ultimate bearing capacity and stability of the entire bridge on the design of reinforced concrete arch bridge. In addition, in consideration of construction, the thesis also studies the applicability of different construction methods such as cable crane system, stiffened skeleton system, swing construction system and cantilever construction system and correspoindingly economica spans and their applications of the reinforced concrete arch bridges.

本论文通过对国内外大跨径钢筋混凝土拱桥的设计、施工资料的收集及其出现问题的分析，从设计角度研究了拱轴线形、矢跨比、拱圈截面及拱上构造、全桥极限承载能力及稳定性对钢筋混凝土拱桥设计的影响；从施工角度研究了缆索吊装法、劲性骨架法、转体施工法、悬臂施工法等不同施工方法的钢筋混凝土拱桥的经济适用跨径及其适用条件。

The key steps involved Friedel-Crafts reaction of o-cresol and the Wittig reaction for construction the skeleton of amine moiety,at the same time, using the synthesis of E,(7S)-7-methoxytetradec-4-enoic acid in chapter 2,and Johnson-Clainsen rearrangement as a key step for construction the fatty acid part,the corresponding acid was prepared in 23%and 50%overall yield,respectively.

随后将手性不饱和脂肪酸和氨片段进行酰胺化反应构筑了malyngamide M的基本骨架，再将Z-烯氯转化为E-烯氯完成了目标分子的全合成，高立体选择性地构筑了末端烯氯结构，为制备其它含有类似烯氯结构的malyngamides探索出行之有效的合成路线。

In this review, basically classified by the chemical construction of dendritic skeleton, mainly focusing on the polyamidoamine, polypropylene imine, polycarbosilane, polyether and polyester systems, the recent advances in the rationally designed syntheses and their self-organized superstructure of side-chain LC dendrimers have been summarized and commented.

本文按树枝状大分子骨架的化学结构分类，对侧链型树枝状大分子液晶的设计合成、液晶相行为及其自组织超结构的最新研究进展进行总结和评述，重点介绍了聚酰胺-胺、聚丙烯亚胺、聚碳硅烷、聚醚以及聚酯树枝状大分子液晶体系。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。