The 2012 nobel prize in physics

The 2012 Nobel Prize in Physics has been awarded jointly to Serge Haroche and David J Wineland “for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems”. In this article, we discuss how the experiments of the two Laureates have taught us how to study single quantum particles — using photons to study single atoms in the case of Wineland, and using atoms to study single photons in the case of Haroche. Their work may some day lead to a superfast quantum computer.     

An appreciation of free radical chemistry part 5: Free radicals in organic synthesis

Free radical synthetic methodology has grown by leaps and bounds in just about two decades. The limit to which the scope of free radical synthesis can go is restricted only by the imagination of the synthetic chemist. It greatly simplifies a synthetic sequence, makes use of readily available, relatively inexpensive reactants and reagen-ts; the transformations are selective, involve fewer steps, the yields are good, the reaction conditions are mild, etc. Therefore, such free radical reactions truly qualify to be called “Green Chemistry”.     

The mechanism of Fe (III)-catalyzed ozonation of phenol

Fe (III)-catalyzed ozonation yielded better degradation rate and extent of COD (Chemical Oxygen Demand) or oxalic acid as compared with oxidation by ozone alone. Two parameters with strong effects on the efficiency of ozonation are pH of the solution and the catalyst (Fe³⁺) dosage. The existence of a critical pH value determining the catalysis of Fe (III) in acid conditions was observed in phenol and oxalic acid systems. The best efficiency of catalysis was obtained at a moderate concentration of the catalyst. A reasonable mechanism of Fe (III)-catalyzed ozonation of phenol was obtained based on the results and literature. Project (No. [2003]-AM10: 15) supported by Sino-Finnish Scientific and Technological Cooperation Project     

谈有机实验思维能力的培养

本文从怎样启发学生积极思维,培养学生的思维能力和引导学生进行创造性思维三方面谈有机实验思维能力的培养.     

有机化学实验教学改革探索

有机化学实验作为有机化学的重要组成部分,是化学专业学生必修的专业基础实验课程,对提高化学专业学生的综合能力具有深远的意义,文章从当前有机化学实验现状入手,对有机化学实验教学改革进行了探索,提出了今后有机化学实验发展方向。     

有机合成中的热消去反应

烯类产品或中间体是有机合成中的一类重要的化合物,制备烯烃化合物时热消去反应具有反应收率高、产物纯度好、产品结构单一等优点.以羧酸酯等为例对热消去反应的机理进行了分析研讨.     

Spatial ability and its role in organic chemistry: A study of four organic courses

The relationship between spatial ability and performance in organic chemistry was studied in four organic chemistry courses designed for students with a variety of majors including agriculture, biology, health sciences, pre-med, pre-vet, pharmacy, medicinal chemistry, chemistry, and chemical engineering. Students with high spatial scores did significantly better on questions which required problem solving skills, such as completing a reaction or outlining a multi-step synthesis, and questions which required students to mentally manipulate two-dimensional representations of a molecule. Spatial ability was not significant, however, for questions which could be answered by rote memory or by the application of simple algorithms. Students who drew preliminary figures or extra figures when answering questions were more likely to get the correct answer. High spatial ability students were more likely to draw preliminary figures, even for questions that did not explicitly require these drawings. When questions required preliminary or extra figures, low spatial ability students were more likely to draw figures that were incorrect. Low spatial ability students were also more likely to draw structures that were lopsided, ill-proportioned, and nonsymmetric. The results of this study are interpreted in terms of a model which argues that high spatial ability students are better at the early stages of problem solving described as “understanding” the problem. A model is also discussed which explains why students who draw preliminary or extra figures for questions are more likely to get correct answers.     

Going solo: Adventures in organic synthesis

Face to Face

Going solo: Adventures in organic synthesis     

医学检验专业有机化学实验教学法分析

高等医学院医学专业中的重要教学包括有机化学实验,对学生在关于医学知识的学习以及专业水平的提高方面有着重要的影响作用。高等医学院在教学中应加强对医学有机化学实验的教学,进而提高教学的效率以及教学水平。本文针对医学检验专业中的有机化学实验教学进行相关的探讨和分析。     

有机化学教学中穿插化学史教育的重要性

本讨论了化学史在有机化学教学中对学生各方面的教育作用,说明有机化学教学中穿插化学史教育的重要性。     

量子化学方法研究噻吩与过渡金属M=(Mo,Pd,Sn)的吸附行为

基于已有的实验基础上,利用量子化学方法结合Genecp基组水平上研究了噻吩分子与3种过渡金属M=(Mo,Pd,Sn)的吸附微观行为。计算结果表明:不同的过渡金属原子对噻吩分子的吸附存在着不同的吸附位,过渡金属Mo吸附存在多种吸附位以β、θ位为主,且吸附后能量分别降低了328.795kJ/mol和327.868kJ/mol;过渡金属Pd吸附以δ位为主,吸附后能量降低了380.654kJ/mol;过渡金属Sn吸附以α、δ位为主,吸附后能量分别降低了272.514和512.130kJ/mol。吸附能量的计算应考虑零点能的校正,B3LYP方法在构型优化和能量计算上均具有较高的精度和优势。     

GENERAL CONTENTS (Vol.5,2 0 0 1 )

·Ｒｅｖｉｅｗｓ·ＯｎｔｈｅＩｎｔｅｒａｃｔｉｏｎｓｏｆＭｉｃｒｏｗａｖｅｗｉｔｈＬｉｇｈｔｗａｖｅ ＸＵＤｅ ｍｉｎｇ　ＺＨＯＵＳｈｉ ｐｉｎｇ　 ( 1 )………………………………·Ｌｅｔｔｅｒｓ·ＡＮｅｗＥｌａｓｔｉｃｉｔｙａｎｄＦｉｎｉｔｅＥｌｅｍｅｎｔＦｏｒｍｕｌａｔｉｏｎｆｏｒＤｉｆｆｅｒｅｎｔＹｏｕｎｇ’ｓＭｏｄｕｌｕｓｗｈｅｎＴｅｎｓｉｏｎａｎｄＣｏｍｐｒｅｓｓｉｏｎＬｏａｄｉｎｇｓ ＹＥＺｈｉ ｍｉｎｇ　ＹＵＨｕａｎ ｒａｎ　ＹＡＯＷｅｎ ｊｕａｎ　 (89)……………………………ＢｒｉｅｆＩｎ…     

师专有机化学实验课程改革的探索

文章根据师专有机化学实验的现状 ,提出改善实验环境 ,优化课程结构 ,规范操作训练 ,增加微型实验 ,开放实验室和严格考核制度等改革措施 ,并简要介绍实验教学改革的经验和实践效果     

研究型有机化学教学实验——四氢咔唑及其衍生物系列合成

从本科生研究型有机化学实验的角度论述了四氢咔唑及其衍生物系列合成实验在教学中的实施情况.通过这种实验的训练激发了学生的创新思维和能力,收到了很好的教学效果.     

双硫腙型吸附树脂的制备及其对Ru(Ⅲ)、Pd(Ⅱ)的吸附性研究

以大孔聚苯乙烯脂为母体,经-NN-与双硫腙接枝,制备了具有高级附容量的大孔双硫腙型吸附树脂,研究了其对Ru(Ⅲ)、Pd(Ⅱ)的吸附性能.