查询词典 Beckmann rearrangement

Different peeling solutions produce different influence on skin tissue, which show respectively:regular rearrangement of epidermic cells, proliferation and rearrangement of collagen, increase of the thickness of epidermis and decrease of melanocytes.

不同剥脱剂对皮肤产生不同的组织学影响，分别表现在对表皮细胞、胶原组织、黑素细胞等的影响上。

Amino-6-nitrobenzodifuroxan was prepared through a three-step reaction from starting material 3, 5-dinitrobenzoic acid:(1)3, 5-dinitroaniline (1) was synthesized from the reaction of DNBA and hydrazoic acid in inert solvent 1, 2-dichioroethane through Schmidt rearrangement with yield of 89.6%;(2) 1 was subjected to nitration to prepare pentanitroaniline (2) with yield of 51.1%;(3) The title compound was prepared from 2 and sodium azide in acetic acid through denitrogenation and then Schmidt rearrangement with yield of 86.8%, m.p.204℃～206℃.

以3，5-二硝基苯甲酸为原料经过3步反应合成了7-氨基6-硝基苯并二氧化吠咱：第1步反应，在二氯乙烷惰性溶剂中，DNBA与叠氮酸反应并发生Schmidt重排反应生成3，5-二硝基苯胺(1)，产率89.6%；第2步反应，1在含100%硫酸的硝硫混酸中硝化生成五硝基苯胺(2)，产率51.1%；第3步反应，2与叠氮酸反应，不经分离直接进行热解脱氮、Schmidt重排反应，得到目标化合物， m.p.204℃~ 206℃，产率86.8%。

First, when operating the DABCO-catalyzed Ireland-Claisen rearrangement of propargylic acrylates 18b-d, we added dienophiles 40a-f in the reaction system to capture the rearranged allenes products respectively. The Diels-Alder adducts 41a-i were obtained with complete regioselectivity. Thus a novel tandem Ireland-Claisen rearrangement /Diels-Alder reaction process with propargylic acrylates has been developed.

首先在进行DABCO-催化的丙烯酸炔丙酯类化合物18b-d的Ireland-Claisen重排反应的同时，于反应体系中分别加入亲二烯体40a-f捕获重排得到的连二烯中间体，一步反应获得了单一区域选择性的Diels-Alder环加成产物41a-i，从而创建了一条新颖的丙烯酸炔丙酯类化合物的Ireland-Claisen重排与Diels-Alder环加成的串联反应路线。

The results show that both norbornenic and cyclopentenic double bonds are involved in the polymerization. The propagation on the NB double bond generates structural unit I by direct addition and unit II by carbocation rearrangement, respectively. Similarly, the propagation on the CP double bond produces structural unit III by direct addition and unit IV by transannular rearrangement, respectively.

结果表明， DCPD分子的降冰片烯双键和环戊烯双键均参与了聚合反应并根据不同链增长机理产生四种链结构单元：通过NB双键的链增长反应可生成直接加成结构单元I和重排结构单元II，通过CP双键的链增长反应生成直接加成结构单元III和跨环重排单元IV。

However, the excessive propagation of rearrangement in the secondary market and ignorance of the study on its risks make the rearrangement performance unconspicuous.

然而， 许多上市公司一味地将重组当作&题材&在二级市场炒作，忽视了对其风险的研究，使得我国上市公司的重组绩效并不明显。

The presence of isopropanol in the crystallization process is beneficial for the formation of small Silicalite-1 nanocrystals. The rearrangement reaction results on the different Silicalite-1 indicate that the rearrangement reaction takes place at the external surface of the crystallites as well as in the mouths of zeolitic pores, but not inside the zeolitic pores.

制备条件对Silicalite-1的催化行为影响较大，在由硅酸乙酯水解老化后的溶胶中添加异丙醇可以促进小晶粒Silicalite-1的生成，改变模板剂的用量、晶化温度和时间等可以合成不同晶粒尺寸和形貌的Silicalite-1纳米晶。

This article starts with the current situation of our national land rearrangement to analyse the requirement for the agricultural land quality information of land settlement required and the application of agricultural land grading results on land rearrangement.

本文从我国土地整理的现状入手，来分析土地开发整理对农用地质量信息的需求分析以及农用地分等成果在土地整理中的应用。

Moreover, the determination of the content of dissociate cyclohexanone-omine in the mixture of rearrangement process in caprolactam production was also studied. The rearrangement mixture is a complicated and difficult system to directly analyze, containing great volume of sulfuric acid and some amount of sulphur trioxide, with higher viscosity and strong corrosivity.

此外本论文还对己内酰胺生产过程中的重排混合物中游离环己酮肟含量测定进行了研究，重排混合物是一个很特殊、难以直接分析的体系，含大量硫酸和少量三氧化硫，粘度大，腐蚀性强，且杂质种类较多。

Hack's law, which can be derived from the second and third Horton's models, is same to allometric relationships between area and population of urban systems, the latter is connected with Beckmann's models and thereby with central place theory.

然后证明基于中心地理论的Beckmann城镇等级—规模模型与 Horton水系构成第一、第二定律数理同构，关于城市人口—城区面积的异速生长关系模型与关于主河道长度—流域面积的几何测度关系模型以及 Horton水系构成的第二、第三定律数理同构

When acetone oxime was used as substrates, lower conversion and selectivity were obtained. For cyclopentanone oxime as the substrate, the Beckmann fragmentation was observed.

对于丙酮肟和环戊酮肟，前者重排得到N-甲基乙酰胺的选择性低，后者则不发生Beckmann重排。

I know.- The murderer'll be there.

我知道 -凶手也会在那儿的

Overseas bank statements (with confirmation of transferability to UK if appropriate).

海外的银行帐号(确认与英国银行的可以转帐)。