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SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang, northern Tibetan Plateau

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Science China earth Sciences 2010年第5期53卷 657-664页

作者： ZHAI QingGuo1 WANG Jun1, LI Cai2.& SU Li3.1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 10003., China 2.College of {2. Sciences, jilin university, {2. 13.061, China 3.The Geological Laboratory {3. and state Key Laboratory of Geological Processes and Mineral Resources, China university of Geo- sciences, Beijing 100083. China 1. Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China2. College of Earth Sciences Jilin University Changchun 130061 China3. The Geological Laboratory Center and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China

Metabasites consisting of metamorphic ultra-mafic rocks, cumulate gabbro, gabbro (diabase), basalt, and plagiogranite are exposed at the Taoxinghu area in central Qiangtang, northern Tibetan Plateau. Zircon SHRIMP U-Pb dating for the cumulate gabbro yields a weighted mean age of 467±4 Ma, which is the oldest and most reliable magmatic age in this area. Zircon 176Hf/177Hf ratios range from 0.2.2.15 to 0.2.2.57, with εHf(t) values of 5.02.0.2., indicating that the cumulate gabbro was mainly derived from the depleted mantle. In addition, geochemical data of metabasites suggest that they have similar characteristics to those in the mid-ocean ridge basalts (MORB). The Taoxinghu metabasites may represent the fragment of Early Paleozoic ophiolite in the "Central Uplift" of the Qiangtang, northern Tibetan Plateau.

关键词： Qiangtang cumulate gabbro SHRIMP dating Hf isotope

Properties and characterization of Au^(3.)-adsorption by mycelial waste of Streptomyces aureofaciences

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Chinese Science Bulletin 2001年第20期46卷 1709-1712页

作者： LIU Yueying, FU Jinkun, HU Hongbo, TANG Dingliang, Nl Zimian & YU Xinsheng1. Department of Biology, 2. state Key Laboratory for Physical Chemistry of solid Surface, {2. {2. for Analysis & Testing, Xiamen {{2., Xiamen {2.1005, China Department of Biology Xiamen University Xiamen China state Key Laboratory for Physical Chemistry of solid Surface Xiamen University Xiamen China center for Analysis & Testing Xiamen University Xiamen China

Mycelial waste of Streptomyces aureofaciences procured from the aureomycin fermentation industry is used as biosorbent for Au3.. The properties of Au3. adsorption by the mycelial waste are studied. The results indicate that the optimum pH value of Au3. adsorption is 3.5. The biosorption is a rapid and non-temperature-dependent process. The bio-sorptive capacity with 45.6 mg/g and efficiency with 91.2. are achieved under the conditions of pH 3.5 and 3.℃ for 45 min, in which the ratio is 50 mg/g dry weight for the concentrations of initial Au3. and the mycelial waste. The Au3. ions adsorbed on the mycelial waste can be eluted. The observation in a transmission electron microscope shows that the Au3. ions can be reduced to Au particles by the mycelial waste and the Au can become gold crystals with differentforms and sizes. X-ray photoelectron spectroscopy analysis further proves that the Au3. can be reduced to Au0 by the mycelial waste.

关键词： Streptomyces aureofaciences mycelial waste gold bio-sorption gold crystal characterization.

Effects of MoO_3.Amounts on Sintering and Electrical Properties of Ce_(0.8)Nd_(0.2.O_(1.9)

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Chemical Research in Chinese Universities 2012年第1期28卷 9-13页

作者： ZHOU De-feng1, ZHAO Gui-chun1, YANG Mei1, XIA Yan-jie2.and MENG Jian2.1. School of Chemistry and Life Science, changchun university of Technology, changchun 13.012. P. R. China 2. {3. Key Laboratory of rare earth Resources Utilization, changchun Institute of Applied Chemistry, Chinese Academy of Sciences, changchun 13.02., P. R. China School of Chemistry and Life Science Changchun University of Technology Changchun 130012 changchun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Rare Earth Resources Utilization Changchun 130022

The high purity （Ce0.8Nd0.2.1.9）1-x（MoO3.x（x=0, 0.005, 0.010, 0.02.; Ce0.8Nd0.2.1.9=NDC） solid solutions were prepared by modified sol-gel method. The structures and electric conductivities were characterized by X-ray diffraction（XRD）, field-emission scanning electron microscopy（FESEM） and electrochemical impedance spectros copy（EIS）. The XRD results show that the materials were pure phase with a cubic fluorite structure. Compared to the undoped-NDC samples, MoO3.doped-NDC showed higher sintered density（over 96%） at reduced sintering tempera ture. The electric conductivity（σt） of （Ce0.8Nd0.2.1.9）1-x（MoO3.x at 400 °C was 9.58×10-4 S/cm when x=0.010, which was higher than that of undoped-NDC samples（σt=3.2.×10-4 S/cm）. The obtained optimal amount of the MoO3.was x=0.010 in this system.

关键词： Neodymium-doped ceria Molybdenum oxide Sol-gel method Grain boundary conductivity

Surface configurations during annealing of sputter-deposited NiTi thin films

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Chinese Science Bulletin 1997年第23期42卷 2019-2020页

作者： GONG Fengfei, JIANG Enyong, SHEN Huimin and WANG Yening1. Department of Applied Physics, Tianjin university, Tianjin 3.0072.The National Laboratory of {2. {2. Microstructures, Nanjing university, Nanjing 2.0008 center for Advanced Studies in Science and Technology of Microstructures, Nanjing 2.0093. China 2. Department of Physics, Tianjin university, Tianjin 3.0072. China 3. National Laboratory of {2. {2. Microstructures, Nanjing university, Nanjing 2.0008, center for Advanced Studies in Science and Technology of Microstructures, Nanjing 2.0093. China. Department of Applied Physics Tianjin University Tianjin The National Laboratory of solid state Microstructures Nanjing University Nanjing center for Advanced Studies in Science and Technology of Microstructures Nanjing China Department of Physics Tianjin University Tianjin China National Laboratory of solid state Microstructures Nanjing University Nanjing

SPUTTER-DEPOSITED NiTi thin films are becoming more and more important because of their po-tential applications to the intelligent thin-film systems. The as-deposited NiTi thin films pre-pared by magnetron sputtering are generally amorphous. Because the amorphous NiTi thinfilms cannot show shape memory effect, they should be crystallized under appropriate anneal-

关键词： NiTi Surface configurations during annealing of sputter-deposited NiTi thin films

High-pressure synthesis and properties of CeO_2.ZrO_2.solid solution

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Chinese Science Bulletin 2001年第10期46卷 801-806页

作者： XU Dapeng, WANG Quanyong, LU Zhe, LIU Zhiguo, ZHANG Gongmu & SU Wenhui1. Department of Physics, jilin university, changchun 13.02. China 2. International {2. for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China 3. {2. for Condensed Matter and Radiation Physics, China {2. of Advanced Science and Technology (World Laboratory), Beijing 100080, China Department of Physics Jilin University Changchun China International center for Materials Physics Chinese Academy of Sciences Shenyang China center for Condensed Matter and Radiation Physics China Center of Advanced Science and Technology (World Laboratory) Beijing China

Using nanoparticles of CeO2.and ZrO2.prepared by the chemical precipitation method as starting materials, the single-phase cubic Ce0.5Zr0.5O2.solid solution (c-Ce0.5Z0.5O2. has been synthesized under 3.1 GPa at 1073.K for the first time. The structure of the c-Ce0.5Zr0.5O2.has not been changed before and after annealing at 773.K for 1 h. Only an unknown EPR signal (g =1.990) has been observed in the c-Ce0.5Zr0.5O2.and not varied after annealing at 773.K for 1 h, which exhibited that there exists no Ce3. in the c-Ce0.5Zr0.5O2.and the Ce4+ has not been reduced into Ce3. after annealing. The transport mechanism is ionic for the c-Ce0.5Zr0.5O2. The bulk conductivity (a =1.2.10-5 S/cm at 82.1}K, σ=2.1 ×10-3.S/cm at 112.1}K) is the same as that of CeO2. but smaller than that of Y2.3.stabilized ZrO2. A marked curvature at T = 82.1}K has been observed in the Arrhenius plot of the bulk conductivity. The activation energy below 82.1}K is lower than that above 82.1}K, and the reason has been discussed.

关键词： CeO2.ZrO2 nanocrystalline high-pressure and -temperature solid-state reaction solid solution.

An SANS Study of Decomposition Kinetics in Amorphous Cu_(12.5)Ni_(10)Zr_(41)Ti_(14)Be_(2..5)

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Journal of Materials Science & Technology 1998年第3期14卷 193-199页

作者： Junming LIU(National Laboratory of solid state Microstructures, Nanjing {2. and {3. for Advanced Studies in Scienceand Technology of Microstructures, Nanjing 2.0093. China) National Laboratory of solid state Microstructures Nanjing University Center for Advanced Studies in Science and Technology of Microstructures Nanjing 210093 China

Phase decomposition in amorphous Cu12.5Ni10Zr411Ti14Be2..5 alloy as annealed in the super-cooled liquid range was studied by applying small angle neutron scattering (SANS). As annealed between 600 K and 700 K, the alloy was observed to decompose into two new amorphous phases,with the second phase precipitates embedded in the matrix of the first. Long time annealing of the alloy results in crystallization in addition to evolution of the decomposed *** kinetic diagram of the decomposition and crystallization for this alloy is given. The second phase precipitates have several nanometers in size and occupy a quite low volume fraction. The decomposition of the supercooled liquid in overall temperature range exhibits the features of spinodal reaction.

关键词： Be Zr SANS Ni Ti

Formation and migration of space charge packet in low density polyethylene

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Science China(Technological Sciences) 2005年第3期48卷 354-360页

作者： ZHENG Feihu 1 , ZHANG Yewen 1 , GONG Bin 1 , ZHU Jianwei 1 & WU Changshun 2.1. Pohl Institute of solid state Physics, Tongji {2., Shanghai 2.0092. China 2. China National {3. for Quality Supervision and Test of Electric Ware and Cable, Shanghai 2.0093. China 1. Pohl Institute of solid state Physics Tongji University 200092 Shanghai China 2. China National center for Quality Supervision and Test of Electric Ware and Cable 200093 Shanghai China

Pressure wave propagation (PWP) method was utilized to observe the space charges packet-like behavior in sheet samples of low-density polyethylene (LDPE) under the relative low electric field. The experimental results show that space charge packets are always generated at the anode and move across the sample to the cathode regardless of the polarity of DC voltage. This paper discusses the migration of space charge packets at 3.–40°C, the possible charge resource of space charge packets carriers and trap level of the space charge.

关键词： solid dielectric,low-density polyethylene,space charge packet,trap.

Molecular hosts for triplet emitters in organic light-emitting diodes and the corresponding working principle

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Science China Chemistry 2010年第8期53卷 1679-1694页

作者： MI BaoXiu1,2.GAO ZhiQiang1,LIAO ZhangJin2.HUANG Wei2.& CHEN Chin Hsin3.1Jiangsu Engineering center for Flat-Panel Displays & {2.-{2. Lighting School of Materials Science & Engineering,Nanjing {3. of Posts & Telecommunications,Nanjing 2.0046,China 2.ey Laboratory for Organic Electronics & Information Displays (KLOEID),Institute of Advanced Materials (IAM),Nanjing {3. of Posts & Telecommunications,Nanjing 2.0046,China 3.isplay Institute,Microelectronics and Information Systems Research center,National Chiao Tung {3. Hsinchu,Hsinchu,3.0 China 1. Jiangsu Engineering center for Flat-Panel Displays & solid-{2. Lighting School of Materials Science & Engineering Nanjing University of Posts & Telecommunications Nanjing 210046 China2. Key Laboratory for Organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing 210046 China3. Display Institute Microelectronics and Information Systems Research Center National Chiao Tung University Hsinchu Hsinchu 300 China

This paper summarizes the mechanism and routes for excitation of triplet emitters in dopant emission based phosphorescent organic light-emitting diodes (PhOLEDs),providing a comprehensive overview of recent progress in molecular hosts for triplet emitters in ***,based on the nature of different hosts,e.g.,hole transporting,electron transporting or bipolar materials,in which the dopant emitters can be hosted to generate phosphorescence,the respective device performances are summarized and *** are given to the relationships among the molecular structure,thermal stability,triplet energy,carrier mobility,molecular orbital energy level and their corresponding device performances.

关键词： phosphorescent organic light-emitting diodes (OLEDs) working principle electrophosphorescence hosts triplet emitter

Molecular biological analysis of remains from Jiangjungou Cemetery in Inner Mongolia

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Progress in Natural Science:Materials International 2006年第7期16卷 727-731页

作者： WANG Haijing, LIU Weiqiang, FU Yuqin, ZHANG Xiaolei, ZHOU Hui and ZHU Hong ( Research center for Chinese Frontier Archaeology of jilin university, {2. 13.012. China College of Chemistry, jilin university, changchun 13.02., China College of Life Science, jilin university, changchun 13.02., China) [a]Research center for Chinese Frontier Archaeology of jilin university Changchun China [b]College of Chemistry Jilin University Changchun China [c]College of Life Science Jilin University Changchun China

The 3.4-bp nucleotide sequence in hypervariable region I (HVRI) of mitochondrial DNA is successfully amplified from 9 out of 11 individuals of an ancient population buried in the Jiangjungou Cemetery in Inner Mongolia dated back to the Warring states Period in China. Nine fragments with different variations are obtained. A phylogenetic tree and a multidimensional scaling (MDS) plot are constructed using mtDNA sequences from the ancient population and several modern Asian populations. The results show that ancient population shares a closer genetic relationship with East Asian populations than with North and Central Asian populations. The genetic and historical evidence raise the possibility that the population might be the immigrants from Zhongyuan area, sent by the King Wuling of Zhao state to guard the nation against the attack from Huns.

关键词： mtDNA genetic relationship ancient DNA population.