Synthesis and Structure of a Novel Supramolecular Compound [Co(2,2′-bipy)(H_2O)_4 ][trans-1,4-chdc] and Separation of Isomer of 1,4-Cyclohexanedicarboxylic Acid

IntroductionRational designs and syntheses of inorganic-organ-ic hybrid materials constructed from flexible ligandshave received considerable attention because of theirnovel structures as well as their special functional prop-erties[1,2]. Multicarboxylate…     

LD抽运Nd∶Gd_(1-x)Y_xVO_4连续波激光器的实验研究

报道了一种半导体二极管 (LD)抽运Nd∶Gd1-xYxVO4 晶体 ,采用简单、结构紧凑的平 平腔设计 ,实现了 1.0 6 μm连续波激光输出 ,在 8W的注入功率下 ,获得 3.2 5W的 1.0 6 μm连续波激光输出 ,光 光转换效率为 4 1% ,斜效率为 4 5 % KTP腔内倍频实现了稳定的连续波 5 32nm绿光激光运转 ,当注入功率为 8W时 ,单向获得了 6 2 1mW的单模绿光输出     

D(β)-vertex-distinguishing total coloring of graphs

A new concept of the D(β)-vertex-distinguishing total coloring of graphs, i.e., the proper total coloring such that any two vertices whose distance is not larger thanβhave different color sets, where the color set of a vertex is the set composed of all colors of the vertex and the edges incident to it, is proposed in this paper. The D(2)-vertex-distinguishing total colorings of some special graphs are discussed, meanwhile, a conjecture and an open problem are presented.     

Capacity of a Simultaneous Quantum Secure Direct Communication Scheme between the Central Party and Other M Parties

We analyse the capacity of a simultaneous quantum secure direct communication scheme between the central party and other M parties via M＋1-particle GHZ states and swapping quantum entanglement. It is shown that the encoding scheme should be secret if other M parties wants to transmit M ＋ 1 bit classical messages to the centre party secretly. However, when the encoding scheme is announced publicly, we prove that the capacity of the scheme in transmitting the secret messages is 2 bits, no matter how large M is.     

Structure of Metal Aluminophosphates:Al_(9-x)M_xP_(12)O_(48)(TREN)_4·yNH_4·zH_2O [TREN=N(CH_2CH_2NH_3)H_m,M=Mn,Co]

IntroductionA great deal of efforts have been devoted to thesynthesis of novel compounds with open frameworkstructures due to their potential applications in thefields of catalysis,ion exchange,molecular recogni-tion,optics and electronics[1,2].As a resul…     

The Reduction of a Natural Diterpene Containing a, B-Unsaturated Keto Group

Hedychenone (1), a diterpene containing a, B-unsaturated keto group, was reduced by aluminum-mercury alloy, and a dimerized product (2) was obtained as the major product. The coupling occurred at B position of the keto group.     

李群的解析对合自同构对的分类

本文给出复单李代数的对合自同构对的分类,并利用它研究单连通,单李群的解析对合自同构对的分类.     

激光微区发射光谱谱线品质的研究

利用单脉冲YAG激光、YGJ Ⅱ激光微区分析仪结合光电检测系统 ,在减压氩气环境下实验研究了金属分析样品发射光谱中CuⅠ 32 4 7nm和CuⅠ 32 7 4nm的时间特性、谱线强度及空间分布 ,并与空气环境下的实验结果进行了比较。实验结果表明在减压氩气环境下 ,激光微区发射光谱与环境气体、环境气压和辅助激发参数密切相关。当辅助电极端面直径为 1 5mm、辅助电极距分析样品表面高度为 4mm、辅助电极间距为3mm、辅助激发电压为 1 30 0V、氩气压力 33 2kPa时 ,CuⅠ 32 4 7nm和CuⅠ 32 7 4nm谱线的发射时间比空气下延长了 50 0 μs,谱线强度约为相同气压空气环境下的 4倍 ,约为 1个大气压空气环境下谱线强度的 2倍 ,谱线的半最大值宽度明显变窄。因此氩气环境延长了谱线的发射时间 ,减少了自吸效应 ,使谱线强度明显增强 ,谱线品质得到显著改善。     

微波溶样-AAS法测定麻黄素浸膏粉中的12种元素

微波溶样技术具有方便快捷、节约试剂、污染少、样品溶解完全等特点。本文采用HNO3 H2O2 微波溶样 ,利用原子吸收分光光度法 ,通过对麻黄素浸膏粉中Fe,Ca ,Mg,Zn ,Mn,Cu ,Na ,K ,Ni,Cd ,Pb ,Cr元素的测定 ,进行了微波消化条件的选择及消化结果精密度实验 ,并利用国家标准物质茶树叶GBW0 850 1验证了方法的准确度 ,测定值与标准值基本吻合。实验结果表明 ,该方法获得了满意的精密度、准确度。     

氯酚红-蛋白体系的共振光散射法定量测定蛋白质

研究了酸性染料氯酚红与蛋白质的结合反应。在pH为4.00的邻苯二甲酸氢钾缓冲介质中,氯酚红与蛋白质通过分子间作用力形成复合物。使最大波长约为340nm的共振光散射光谱得到加强。基于这一现象可以测定低至0.020mg·L~(-1)的血清白蛋白,工作曲线在0～0.75mg·L~(-1)范围内呈线性关系。此方法的稳定性好,灵敏度高,用于人血清试样中总蛋白的测定,与常用的双缩脲法基本一致,且灵敏度高。