HPLC-ESI-MS和FTIR方法鉴别不同产地中药肉苁蓉的研究

采用HPLC-ESI-MS和傅里叶红外光谱法对五种不同产地中药肉苁蓉进行了分析,采用HPLC-ESI-MS检测了中药肉苁蓉中荒漠肉苁蓉苷A、松果菊苷、毛蕊花糖苷、异毛蕊花糖苷、2’-乙酰基毛蕊花糖苷、荒漠肉苁蓉苷C、管花苷B七种有效成分的含量。采用傅里叶红外光谱法,以五种药用植物样品的红外指纹图谱为依据,计算出所测样品的共有峰率和变异峰率。建立了五种药用植物的共有峰率和变异峰率双指标序列。结果显示两种方法对药材评价结果基本一致。采用傅里叶变换红外光谱法亦可区分肉苁蓉的常见伪品锁阳。HPLC-ESI-MS具有高通量、高灵敏度、分析快速等优点,可以通过主要化学成分含量的测定对肉苁蓉进行质量评价。傅里叶红外光谱法可以对样品进行无损处理,不需要对药材进行复杂的提取分离过程即可获得肉苁蓉红外光谱特征,其光谱的吸收峰强度与峰形是各种官能团互相作用的结果,是肉苁蓉多组分红外光谱的叠加。我们能从整体水平分析谱图特征峰,具有分析速度快,重现性好,非破坏性和样品量小,制样简单,专属性强,节约成本,保护环境等优点,符合中药向综合分析和整体分析的发展趋势。HPLC-ESI-MS和傅里叶红外光谱法联合应用,两种方法互为补充,为鉴别中药的真伪,探讨中药质量评价提供了一种新方法。     

一维GaN纳米线蓝色激光

作为一种化合物半导体材料 ,ＧａＮ材料具有许多硅基半导体材料所不具备的优异性能 ,包括能够满足大功率、高温高频和高速半导体器件的工作要求。其中ＧａＮ区别于第一和第二代半导体材料最重要的物理特点是具有更宽的禁带 (室温下为 3.4ｅＶ) ,可以发射波长比红光更短的蓝光。图 1　ＧａＮ纳米激光的近场显微镜照片ＧａＮ半导体材料的商业应用研究开始于 1970年 ,其在高频和高温条件下能够激发蓝光的独特性质从一开始就引起了半导体开发人员的极大兴趣。但是ＧａＮ的生长技术和器件制造工艺直到近几年才取得了实质性进步。 1992年 ,日本Ｎ…     

Synthesis,Crystal Structure and Fluorescent and Thermal Stability Properties of the Zinc(Ⅱ) Complex [Zn(C_(15)H_(11)O_3)_2(C_(12)H_8N_2)_2]·5H_2O

A new complex has been synthesized with o-methylbenzoyl-benzoic acid(HL) and 1,10-phenanthroline(phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b = 17.7876(18), c = 19.998(2), β = 104.720(4)o, C54H48N4O11Zn, Mr = 994.33, V = 4690.2(9)3, Dc = 1.408 g/cm3, Z = 4, F(000) = 2072, μ(MoKα) = 0.59 mm-1, R = 0.0736 and wR = 0.2029. The crystal structure shows that the zinc ions are coordinated with two oxygen atoms from two HL molecules and four nitrogen atoms from two phen molecules, forming distorted octahedral coordination geometry. The fluorescent and thermal stability properties of the complex are studied. The result shows that it has one fluorescent emission band at around 412 nm. In addition, the complex is stable under 210 ℃.     

Synthesis, Crystal Structure and Thermal Stability of a Nickel（Ⅱ） Complex with Bicycle[2.2.1]-2-hepten-5,6-dicarboxylic Acid

The nickel complex {Ni(2,2-bipy)(H2O)3[C8H11O2(COO)]}(H2O)3 with bicycle-[2.2.1]-2-hepten-5,6-dicarboxylic acid [C7H8(COOH)2] and 2,2'-bipyridine (bipy) as ligands has been synthesized and characterized. It crystallizes in monoclinic, space group P , with a = 0.74975(3), b = 1.20309(4), c = 1.30593(4) nm, α = 109.861(2), β = 98.519(2), γ = 90.575(2)o, V = 1.09337(7) nm3, Dc = 1.552 g/cm3, Z = 2, F(000) = 524, the final GOOF = 1.064, R = 0.0397 and wR = 0.1171. The crystal structure shows that the nickel ion is coordinated with four oxygen atoms from one bicycle[2.2.1]-2-hepten-5,6-dicarboxylic acid molecule and three water molecules and two nitrogen atoms from the 2,2′-bipyridine molecule, forming a distorted octahedral coordination geometry. The result of TG analysis shows that the title complex is stable under 200.0 ℃.     

Synthesis,Crystal Structure and Thermal Stability of Complex [Cu（C_（14）H_（10）O_4）（C_（12）H_8N_2）_2]·2H_2O

The title complex has been synthesized with 2,2'-biphenyl dicarboxylic acid and 1,10-phenanthroline(phen)in the solvent mixture of water and methanol.It crystallizes(C38H28CuN4O6,Mr = 700.1)in triclinic,space group P1 with a = 1.0868(2),b = 1.2175(2),c = 1.6206(3)nm,α = 110.161(2),β = 102.605(3),γ = 93.667(2)o,V = 1941.6(6)nm3,Dc = 1.198 g/cm3,Z = 2,F(000)= 722,R = 0.0558 and wR = 0.1208.The crystal structure shows that the copper atom is coordinated with one oxygen atom from 2,2'-bphenyl dicarboxylic acid molecule and four nitrogen atoms from two 1,10-phenanthroline molecules,forming a distorted square-pyramidal coordination.The TG analysis shows that the title complex is stable under 160.0 ℃.     

邻乙酰氨基苯甲酸、邻菲咯啉锌(Ⅱ)配合物的合成、晶体结构及性质研究

在甲醇水混合溶剂中,以邻乙酰氨基苯甲酸(o-ABA),1,10-邻菲咯啉(phen)为配体与高氯酸锌合成了标题配合物[Zn(o-ABA)(phen)₂](ClO₄)·0.5H₂O。配合物(C₆₆H₅₀N₁₀O₁₅C₁₂Zn₂,分子量为1 424.80)晶体属三斜晶系,空间群P1,晶胞参数：a=1.181 6(6) nm,b=1.635 6(8) nm,c=1.752 2(9) nm,α=95.733(9)°,β=93.083(8)°,γ=109.212(8)°;V=3.168(3) nm³,D_c=1.494 g·cm^-3,Z=2,F(000)=1 460。最终偏离因子R₁=0.048 2,wR₂=0.098 3。晶体结构表明：锌原子与1个对乙酰氨基苯甲酸的2个氧原子,2个1,10-邻菲咯啉中的4个氮原子配位,形成六配位的变形八面体结构。并对配合物的热稳定性,光谱及电化学性质进行了分析。     

上海激光康普顿散射伽马源的发展和展望

激光康普顿散射(Laser Campton Scattering, LCS)光源,是一种基于相对论电子束与激光光子相互作用的新型X-ray或Gamma-ray光源。它具有能量高、波长短、脉冲快和峰值亮度高的特性,已成为国际先进光源技术的重要选项之一。本文介绍了激光康普顿散射光源的产生原理、国内外发展现状以及目前国际上运行和在建的激光康普顿散射光源装置,其中重点介绍了上海光源二期正在建设的上海激光电子伽马源(Shanghai Laser Electron Gamma Source, SLEGS)装置,以及在这一光源装置上可以开展的核物理、核天体物理、核废料处理及核医学应用等研究。随着上海软X射线自由电子激光试验装置(Soft X-ray Free Electron Laser, SXFEL)升级为用户装置,以及未来十三五国家重大科技基础设施-硬X射线自由电子装置(Shanghai HIgh repetition rate XFEL aNd Extreme light facility,SHINE)的建设完成,基于直线电子加速器(LINear ACcelator, LINAC)的康普顿散射光源的伽马能量将会达到GeV量级的高能量。超短脉冲、高极化度、高通量的激光康普顿散射光源将迎来新的发展机遇,基于康普顿伽马光源的核物理、天体物理、粒子物理及应用基础研究也必将迈上一个新台阶。     

Smooth and Peaked Solitary Wave Solutions of the Broer–Kaup System Using the Approach of Dynamical System

The bifurcations of traveling wave solutions of the Broer–Kaup system are investigated and all possible exact parametric representations of the smooth and peaked solitary waves are presented.     

一维链状钴配位聚合物{[Co(C4H4O5)(H2O)2]·H2O}n的合成与晶体结构

One dimensional chain cobalt coordination polymer has been synthesized with malic acid and cobalt(Ⅱ) chloride anhydrous, and characterized by the element analysis, IR, TGA and single crystal X-ray diffraction structure analysis. The title complex crystallizes in monoclinic system with space group P2₁, a=0.575 61(9) nm, b=0.905 86(14) nm, c=0.841 02(13) nm, β=105.350(2)°; V=0.422 88(11) nm³, Z=2, D_c=1.924 Mg·m^-3, μ=2.044 mm^-1, F(000)=250, and final R₁=0.029 3, wR₂=0.074 2. The crystal structure shows that the cobalt ion is coordinated with four oxygen atoms from two different malate molecules and two oxygen atoms from two water molecules respectively, forming a distorted octahedral coordination geometry. Two adjacent cobalt(Ⅱ) atoms are bridged by one malate groups in bis-monodentate mode, constructing a one dimensional chain structure along b axis, with the adjacent Co…Co distance being 0.530 9 nm. Moreover, the molecules are packed in three-dimensional supramolecular network though the intermolecular hydrogen bonds. CCDC: 704441.     

基于磁珠分离的生物质谱技术用于急性白血病疗效评价

基于磁珠分离的生物质谱技术,建立急性白血病疗效的血清评价方法。通过对质控血清的连续检测分析,日间及日内重复性均达国际标准,确保血清多肽分析体系的稳定性及可靠性。以30例初发急性白血病血清及其治疗缓解血清为研究对象,经金属铜鳌合磁珠分离和基质辅助激光解吸电离飞行时间质谱仪(MAL-DI-TOF-MS)检测后获得血清多肽谱图。经过FlexAnalysis 2.4软件和Biosun_MS软件分析,在m/z1000～10000范围内,得到27个具有统计学意义(p<0.05)的差异峰,其中治疗缓解后表达上调峰10个,表达下调峰17个,利用上述差异峰建立的诊断模型获得了100%敏感性和90%的特异性。基于磁珠分离和MALDI-TOF-MS检测建立的诊断模型具有较高的敏感性和特异性,对差异峰进行测序鉴定将有助于急性白血病疗效评价和发病机理研究。