Studies on the Synthesis and Separation of Fullerenes and PAHs from Flame

自从1985年C60发现以来，人们一直致力于富勒烯新物种的发现和表征，及它们的物理和化学性质以及它们在各个领域的应用。对于具有独立五元环的富勒烯如C60，C70等已经能够大量合成出来，而对于具有相邻五元环的非经典富勒烯及其衍生物，由于它们非常不稳定，它们的合成分离和表征具有很大的挑战性。目前主要是通过石墨电弧等离子体法通过内嵌或外接的方法，将它们稳定下来并得到。可以说，由于合成的量太少制约着这类数目繁多的富勒烯物种被深入认识和应用。C60等经典富勒烯是从石墨电弧法实现了宏量合成，火焰燃烧的方法则实现了规模化生产。对于非经典富勒烯，如果能够通过燃烧的方法形成，那么就可能实现大量生产。本工作对苯氧...Since the discovery of C60 in 1985, the effort of scientists have been devoted to the discovery and characterization of new species of fullerenes, as well as the physical and chemical properties and their applications in a wide range of fields. The fullerenes obeying the isolated pentagon rule, such as C60 and C70 etc., can be produced in bulk already. For the non-classical fullerenes with abuttin...学位：理学博士院系专业：化学化工学院化学系_无机化学学号：B20042500

A Study of Health Leaders-Initiate in Health Promotion Activities

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A Study of Promoting Conditions Required for Facilitating the Inhabitants-Initiate in Health Promotion Activities

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Iron Loss Distribution Visualization in Magnetic Domain Image by the Bitter Methods

The Bitter method is most commonly observing way of the magnetic domains situation even though it is possible to observe only the surface of specimen. Applying magnetic field to this magnetic material covered by magnetic fluid makes it possible to observe the magnetic domain dynamics by a microscope.This paper reveals that the parts exhibiting 1/f fluctuation frequency characteristic give high the iron loss while not exhibiting 1/f fluctuation parts, i.e. containing much silicon, give low iron loss. Thus, it is revealed that the mixture rate of iron and silicon determines the optimal silicon steel composing most of the electrical machines

Extraction of magnetization characteristic from visualized magnetic domain images by bitter method

従来，磁区の評価を行うには，一定の環境と一台数千万もの高価な装置，そして熟練した技術者が必要でした。我々は磁区の電子顕微鏡画像から磁性体の磁化特性を抽出する全く新しい画期的な方法を提案した。現在，我々は安価な装置で磁性体の磁区を可視化可能とするビッター法を用いて磁性体の磁化特性を抽出する方法を開発している。可視化された磁区動画像の評価を，技術者の目視によって評価していましたが，計算機により自動的に評価できる手法で磁区挙動を評価することを目的に研究を行ってきました。その結果，ビッター法による磁区の可視化動画像から，磁化特性が測定可能である見通しを得たので此処に報告する

Experiment on EHD Printing under DC High Voltage

基于直流电压作用下的电液耦合微喷印系统,考察了溶液浓度和电压两个参数对喷印过程和沉积形态的影响。实验结果表明射流在收集板上沉积的宽度随溶液浓度增大而减小;浓度低时射流沉积为连续形态;浓度增大,射流沉积为液滴-细线相间或者液滴-卫星液滴相间的珠状结构;浓度增大至18%时,产生纳米纤维,直径600nM左右。对给定的EHd实验系统,仅当电压值在2.6kV~4.8kV范围内变化时可保证稳定喷射;且随着电压值增大,珠状结构的直径减小;电压值在该范围之外,无法实现稳定喷射。Based on the EHD printing system under the DC high voltage,the influence of the concentration of solution and the voltage value on jetting process and the collected lines is investigated.Experimental results show that the collected line gets thinner with the concentration of solution increasing.The collected line is continuous at low concentration of solution.The bead form of a droplet with a filament or satellite droplets is collected with the concentration of solution increasing.At 18 % concentration of solution nanofibre with the diameter of 600nm is collected.For a given EHD printing system,when the voltage value is in the range of 2.6 kV ～ 4.8 kV,the jetting process is stable and the diameter of the bead decreases with the voltage value increasing.Outside this range,the stable jetting process can not happen.高等学校科技创新工程重大项目培育资金项目资助(708055);国家863项目资助(2007AA04Z308);国家自然科学基金项目资助(50675184