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Structural characterization and magnetic property of iron-platinum nanoparticles fabricated by pulse electrodeposition

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Rare Metals 2012年第1期31卷 31-34页

作者： li, Cuixia li, zhihong Du, Xueyan Du, Chunling liu, Jingbo Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials Lanzhou University of TechnologyLanzhou 730050China Department of Chemistry Texas A&M University-KingsvilleMSC 161700 University Blvd.Kingsville78363USA

This research develops a novel feasible approach to fabricate Fe-Pt bimetallic nanoparticles (NPs).The overarching goals are to provide guidelines for the design of new nanoscale magnetic materials via a cost-effective and green electrodeposition method and to integrate state-of-the-art instrumentation into nanocharacterization and magnetic properties measurement.

关键词： magnetic materials iron-platinum electrodeposition nanocharacterization nanomaterials

Inkjet printing-based fabrication of microscale 3D ice structures

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Microsystems & Nanoengineering 2020年第1期6卷 305-314页

作者： Fengyi Zheng Zhongyan Wang Jiasheng Huang zhihong li National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of MicroelectronicsPeking UniversityBeijing 100871China

This study proposed a method for fabricating 3D microstructures of ice without a supporting *** inkjet printing process was performed in a low humidity environment to precisely control the growth direction of the ice *** the printing process,water droplets(volume=hundreds of picoliters)were deposited onto the previously formed ice structure,after which they immediately *** 3D structures(maximum height=2000µm)could be formed by controlling the substrate temperature,ejection frequency and droplet *** growth direction was dependent on the landing point of the droplet on the previously formed ice structure;thus,3D structures could be created with high degrees of freedom.

关键词： printing structures hundreds

Determination of astrophysical ^7Be（p, γ）8B reaction rates from the ^7li（d, p）^8li reaction

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Science China(Physics,Mechanics & Astronomy) 2015年第6期58卷 74-80页

作者： DU XianChao GUO Bing li zhihong PANG DanYang li ErTao liU WeiPing China Institute of Atomic Energy School of Physics and Nuclear Energy Engineering Beihang University International Research Center for Nuclei and Particles in the Cosmos Beihang University College of Physics Science and Technology Shenzhen University

The ^7Be（p, γ）8B reaction plays a central role not only in the evaluation of solar neutrino fluxes but also in the evolution of the first stars. Study of this reaction requires the asymptotic normalization coefficient （ANC） for the virtual decay ^8Bg.s. → ^7Be ＋ p. By using the charge symmetry relation, we obtain this proton ANC with the single neutron ANC of ^8lig.s.→^7li ＋ n, which is determined with the distorted wave Born approximation （DWBA） and adiabatic distorted wave approximation （ADWA） analysis of the ^7li（d, p）^8li angular distribution. The astrophysical S-factors and reaction rates of the direct capture process in the 7Be（p, y）SB reaction are further deduced at energies of astrophysical relevance. The astrophysical S-factor at zero energy for direct capture, S 17（0）, is derived to be （19.9 ± 3.5） eV b in good agreement with the most recent recommended value. The contributions of the 1 ^＋ and 3^＋ resonances to the S-factor and reaction rate are also evaluated. The present result demonstrates that the direct capture dominates the ^7Be（p, γ）8B reaction in the whole temperature range. This work provides an independent examination to the current results of the ^7Be（p, γ）8B reaction.

关键词： ^7li(d p)^8li Ed = 12 MeV DWBA analysis mirror system, ^7Be(p γ)8B astrophysical S-factors and reaction rates

Taxonomy,Zonation and Correlation of the Graptolite Fauna across the Lower/Middle Ordovician Boundary Interval in the Yangtze Gorges Area,South China

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 32-47,44-47+43页

作者： WANG Chuanshang WANG Xiaofeng CHEN Xiaohong li zhihong Wuhan Center of China Geological Survey

The graptolite fauna across the Lower and Middle Ordovician boundary at the Huanghuachang GSSP section, Yichang and the Jianyangping section, Xingshan County is described. The taxonomy of the pendent didymograptids, the graptolite zonations across the base of Middle Ordovician and their correlations are discussed in this paper. The two revised graptolite zones, the Didymograptellus bifidus Zone and the Azygograptus suecicus Zone, can be well correlated to their equivalents elsewhere in the world.

关键词： graptolite Huanghuachang section Middle Ordovician

Study on the adsorptive catalytic voltammetry of aloe-emodin at a carbon paste electrode

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Science China Chemistry 2005年第5期48卷 442-448页

作者： li Ju'nan GAO Peng li Xiangling YAN zhihong MAO Xun College of Chemistry Xiangtan University Xiangtan 411105 China College of Chemistry Xiangtan University Xiangtan 411105 China College of Chemistry Xiangtan University Xiangtan 411105 China College of Chemistry Xiangtan University Xiangtan 411105 China College of Chemistry Xiangtan University Xiangtan 411105 China

A new catalytic voltammetric method for the determination of anthraqunone medi-cines at a carbon paste electrode (CPE) was described for the first time. The mechanism of the catalytic reaction was investigated by using linear sweep voltammetry, cyclic voltammetry, con-stant potential electrolysis and so on. The experiment results indicate that aloe-emodin was effi-ciently accumulated at a CPE by adsorption. In the following potential scan, aloe-emodin was reduced to homologous anthrahydroquinone compound, then the compound was immediately oxidized to aloe-emodin by the dissolved oxygen, and the aloe-emodin was again reduced at the CPE. As a result, a cyclic catalytic reaction was established. But a reversible redox reaction of aloe-emodin can only be observed at a mercury electrode, no catalytic reaction occurs there. A sensitive catalytic voltammetric peak of aloe-emodin was obtained at about ?0.60 V (vs. SCE) in 0.56 mol/L NH3-NH4Cl buffer (pH 8.9). The proposed method was applied to the determination of aloe-emodin in the Radix Rhei with satisfactory results. The determination results were in good agreement with reference values obtained by the HPLC. The adsorptive catalytic voltammetry for the determination of organic compound at CPE, chemically modified electrode and other solid electrodes could be significant in the studies on pharmacology, pharmacodynamics, toxicity of medicine, clinical medicine and biochemistry.

关键词： aloe-emodin, adsorptive catalytic voltammetry, carbon paste electrode.

Preparation and H_2O_2oxidation of extract

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International Journal of Mining Science and Technology 2012年第5期22卷 731-734页

作者： Tian Yujiao Qin zhihong li Baomin School of Chemical Engineering and Technology China University of Mining & Technology Xuzhou 221116 China

Tongting coal(TTC) was exhaustively extracted with carbon disulfide and N-melthy-2-pyrolidinone(CS 2 /NMP) mixed solvents to afford brown particles of extract,which was characterized with proximate analyzer,transmission electron microscope(TEM) and Fourier transform infrared(FTIR) *** results show that the nanometer particles of extract,which were free of ash,are superfine and superclean with tract content of 0.02% A d and particles size of about 100-150 *** and extract were then subject to oxidation with H 2 O 2 and oxidation products were subsequently analyzed with FTIR and gas chromatography/mass spectrometer(GC/MS).The results show that extract is more reactive with H 2 O 2 in comparison to TTC and richer in oxygen-containing species including phenols,alcohols,ethers,esters,carboxylic acids and anhydrides.

关键词： Extract H 2 O 2 Preparation Oxidation Oxygen-containing species

Calibration and Experimental Research of a Multiple-wavelength Flame Temperature Instrumentation System

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Journal of Thermal Science 2004年第4期13卷 371-375页

作者： zhihong li Shi liu Huaiping Mu Fan Jiang Jianmin Guo Chinese Acad Sci Inst Engn Thermophys Beijing 100080 Peoples R China

This paper presents a study on a novel instrumentation system for the measurement of temperature distribution of combustion flames. This system operates upon the three-color principle combining advanced optical sensing and digital image processing techniques. It comprises an endoscope, a light splitter assembly, a CCD camera, a frame-grabber and associated software. This system was calibrated using a blackbody furnace as standard temperature source. The relationship between flame temperatures and grey-level of the images was established through image processing and function correlation. Experimental results obtained on a gas-fired combustion rig provide flame images and temperature distributions on three different wavelengths. Based on the flame temperature distribution the combustion conditions can be analyzed. Experimental results also reveal that this system is capable of online measurement of temperature distribution in a combustion zone. This system can potentially be applied to many areas such as power generation, metallurgy, chemical engineering. It is also a powerful tool for improving the control of combustion process. Keywords three-color method - flame monitor - temperature - imaging processing CLC number TK311

关键词： three-color method flame monitor temperature imaging processing

A DFT study on the interaction of Co with an anatase TiO_2 (001)-(1×4) surface

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Journal of Natural Gas Chemistry 2009年第1期18卷 78-82页

作者： Zhijun Zuo Wei Huang Peide Han zhihong li Jian Huang Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan 030024 Shanxi China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi China

The substitution/adsorption structures of Co on an anatase TiO2 （001）-（1 × 4） surface are investigated using the DFT/local density approximation （LDA） method. Theoretical calculation shows that the Co ion prefers to be adsorbed on the surface of anatase TiO2. The density of states （DOS） analysis finds that the Co 3d is located mainly in the energy gap region. The Co 3d partial density of states （PDOS） indicates that there is a substantial degree of hybridization between O 2s and Co 3d in valence band （VB） regions in the substitution models. The conclusion is that the mode of substitution is more active when the catalyst is a higher-energy surface.

关键词： DFT anatase (001)-(1 ×4) Co

qRgls1.06, a major QTL conferring resistance to gray leaf spot disease in maize

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The Crop Journal 2021年第2期9卷 342-350页

作者： Hao Sun lihong Zhai Feng Teng zhihong li Zuxin Zhang National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina Medical College Hubei University of Arts and ScienceXiangyang 441053HubeiChina Hubei Tenglong Seed Co. LtdXiangyang 441100HubeiChina

Gray leaf spot(GLS)caused by Cercospora zeae-maydis and *** is an extremely devastating leaf disease that limits maize production *** use of GLS-resistant maize hybrids is the most cost-effective approach for reducing *** to GLS is quantitatively inherited in maize(Zea mays L.)and further sources of resistance remain to be ***,we detected qRgls1.06,a major quantitative trait locus for GLS resistance in bin 1.06 that explained approximately 55%of the phenotype *** mapping over 2 consecutive years localized qRgls1.06 to a 2.38-Mb *** qRgls1.06^(WGR/WGR) plants in DZ01 background displayed higher GLS resistance and 100-grain weight than DZ01 *** GLS responses of several susceptible elite inbred lines were improved by the introduction of qRgls1.06 by marker-assisted *** findings extend the understanding of the genetic basis of resistance to GLS and provide a set of resistant germplasm for genetic improvement of resistance to GLS in maize.

关键词： Fine mapping Marker assisted selection Quantitative trait locus Yield-related traits Zea mays