Reactivity of oxidative cleavage of 1,2-diketones mediated by selective binding of cyclodextrins and

来源 :Acta Chimica Sinica(English Edition) | 被引量 : 0次 | 上传用户:alex709
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Recently,amylose,a linear glucan with same α-1,4-glucoside linkage as in cyclodextrins(CD),and its derivatives used as host have gained growing significance.Being a host,itdiffers from CD in the fact that the latter possesses pre-constituted cavity with a fixed size de-pending on the number of constituting glucose residue.For instance,in amylose there is aself-organization of macromolecular conformation from random coil or loose helices jointedwith some coil regions to interrupted helices during the binding process.Then the complexformed is relatively loose and usually the whole hydrophobic substrate enters into the cavityof amylose helix. Recently, amylose, a linear glucan with same α-1,4-glucoside linkage as in cyclodextrins (CD), and its derivatives used as host have an increasingly growing significance.Being a host, itdiffers from CD in the fact that the latter possesses pre -constituted cavity with a fixed size de-pending on the number of brew glucose residue. For instance, in amylose there is a self-organization of macromolecular conformation from random coil or loose helices jointed with some coil regions to interrupted helices during the binding process. the complex formed is relatively loose and usually the whole hydrophobic substrate enters into the cavity of amylose helix.
其他文献
1、导论硬齿面齿轮如渗碳齿轮等,因其承载能力较大,寿命较高,且可做得小而轻,因而近年来它们被广泛地用作减速齿轮。按德国工业标准,表面硬化齿轮的加工精度应在6级(相当于
10月9~15日维也纳 BA-CA 杯黄金赛奥地利维也纳室内硬地总奖金:58.625万欧元冠军奖金:10.86万欧元冠军积分:250上届冠军:柳比西奇本届冠军:柳比西奇(克罗地亚)6:3、6:4、7:5
生产特重钢轨首先必须考虑孔型系统的基本工艺条件。合理的重轨孔型系统的轧制道次不应少于9道次。在现有条件下不增建轧机是不可能大量生产特重钢轨的。增建一座850二辊可逆
自2004年提出收入分配改革至今,政府已出台多项政策,涉及提高劳动报酬、提高居民财产性收入、降低个人所得税、降低社保缴款和提高社会补助五方面。此次个税起征点的再调整或
为了测定铀试剂络合物的不稳定常数采用了“隐蔽配位质点”法。计算了铀试剂与Zr、Ti(Ⅳ)、Th、U(Ⅳ)、Fe(Ⅲ)、Be、Al、Ga、In、Sc、Y、稀土元素、Cu、Ni和Co的络合物的不
对大型机加零件采用一序一具的专用夹具或一些低效率的加工方法,对多品种、中小批量生产、产品更新换代较快的飞机制造来说,显然很不相适应。为了改变大型机加零件传统的工
12 new diarylacet ylenedicobal t hexacarbonyl complexes were synthesized by complexation reaction of a-naphthyl,a-thienyl or sub-stituted-phenyl phenylacetylen
摘自《鞍钢技术》1983年第2期,沈华枢、解迎光的文章: 对于八十年代热带钢轧机,下列一些技术可能得到广泛地发展: 1.斯太柯热卷取箱这种热卷取箱一般装在粗、精轧机之间的中
著名的会计史学家迈克尔·查特尔菲德曾说过:“会计的发展是反映性的……会计主要是应一定时期的商业需要而发展的,并且与经济发展密切相关”。财务会计和财务报告总是随着经济
前言以108-S为代表的扩散喷嘴作为商品问世之后到现在已经近20年了。在此期间,作为最实用的高速切割喷嘴,即使在取得了确实可靠的成绩的今天,也没有出现过完全 Introductio