太岁系统差异形成考

与岁星纪年相关的系列问题是历史年代学中关注争论的焦点,传统“岁星超辰“说或“太岁超辰“说的局限性日益显现。本文以《淮南子》、《史记》、《汉书》等古籍及马王堆汉墓帛书《五星占》记载为中心线索,综合各家学者的研究成果,并在此基础上对太岁系统差异形成原因及其对纪年方式演变的影响做出新的合理解释,进而对汉太初改历干支纪年之争予以重新解读

基于动态组合化学的重金属离子催化信号放大

构建了一个简单的亚胺席夫碱动态体系,应用吸收光谱法研究了二价过渡金属离子Zn2+、Cd2+存在时席夫碱各动态组分之间的胺交换过程.实验表明,金属离子与脂肪胺席夫碱的亚胺氮原子的配位结合,活化了亚胺碳原子,有利于芳香胺的亲核取代反应,进而提高了该动态过程的动力学过程,动力学影响成为制约动态平衡的主要因素.研究还表明,金属离子的循环催化作用极大地促进了脂肪亚胺向芳香亚胺转换,即微量金属离子的引入,便能使动态过程的反应速率和转化率发生显著变化,增强转换过程中的光学输出信号,达到信号放大的目的

Cultivation Experiment on Marine Cladocera, Penilia avirostris Dana

海洋枝角类是稚幼鱼的理想活饵料,1997年4—6月进行鸟喙尖头溞的培养试验,在水温为19—26℃,盐度为24—28‰的条件下,在4个0.5吨的水泥池中,单用面包酵母培养,经过12—16天,种群最高密度可达1300—2200个/升。利用小球藻培养效果较好,生殖量大,平均每个成体每胎可产13个幼体,水泥池中使用酵母培养的平均只产4.25个。Marine cladocera is the preFerential living Food For Fish Fry.During April to June, in 1997, cultivation experiment on Penilia avirostris Dana was carried out at 19 -26℃ and 24 - 28‰ S in Four 0.5m3 concrete pools.Having been Fed by bread yeast For 12 -16 days, the population density of P.avirostris would reach the peaks of 1300 - 2200 individuals per liter.It's clear that the Food eFFect of Chlorella sp.was much better than that of bread yeast.The Female Fed on Chlorella sp.may have larger reprodutive capacity, on the average, it had 13 larvae per brood.The one Fed on yeast in concrete pools only and 4.25 larvae

吸附物种在金纳米电极上的表面扩散

应用激光加热拉伸法制备金纳米电极,研究了非金属物种氧和碘在金纳米电极表面的吸附以及金属铅和铜在金纳米电极表面的欠电势沉积行为,观察到吸附物种在金纳米电极上显著的表面扩散现象

Preparation and Characterization of Prussian Blue Modified Nanoelectrode

采用激光加热拉伸的方法制备铂纳米电极，并通过交流电刻蚀的方法制备纳米孔电极，在这两种电极上可通过电化学方法原位合成单颗普鲁士蓝微晶. 结果表明，普鲁士蓝微晶在纳米微孔电极上的机械附着强度增强. 这种方法可用于制备纳米修饰电极或研究功能微晶体材料的电化学性质.The Pt nanoelectrodes were fabricated by using a laser-based pipet puller and the recessed nanoelectrodes were prepared by etching of disk Pt nanoelectrodes wtih high frequency ac voltage. Prussian blue microcrystal was synthesized electrochemically on the both disk and recessed Pt nanoelectrodes. The strength of mechanical adhesion for the Prussian blue microcrystal on the nanoelectrode was enhanced. A novel method for the controllable synthesis of single particle is proposed, which has potential applications in modified electrodes and single particle electrocatalysis.国家自然科学基金项目（No. 20973142），中美NSFC-NSF化学领域合作项目（No. 21061120456）和国家自然科学基金委界面电化学创新群体（No. 21021002）资助作者联系地址：厦门大学 固体表面物理化学国家重点实验室，化学化工学院化学系，福建 厦门 361005Author's Address: State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China通讯作者E-mail：[email protected]

兰州冷却环总体设计

兰州重离子冷却环CSR是兰州重离子加速器研究装置HRRFL的一项升级工程,是一个双冷却储存环系统,由主环CSRm和实验环CSRe构成．从HIRFL回旋加速器系统来的重离子束,首先注入到主环CSRm中进行累积冷却,然后加速到较高的能量引出打初级靶产生放射线次级束RIBs或高离化重离子束,这些次级束再被送到验环CSRe储存起来以开展内靶实验

Bi4Nb0.5V1.5O11-δ based electrochemical membrane reactor for moderate temperature oxygen seperation

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