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有机化学实验教学改革初探

咸宁学院学报 2002年第3期22卷 66-68页

作者：柯汉忠中国地质大学材料科学与化学工程学院湖北武汉430074

讨论了传统有机化学实验教学中的不足 ,对有机化学实验教学改革和实验考试改革进行了初步探讨 ,调动了学生的学习积极性。

关键词：有机化学实验教学改革

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掺镧改性钛酸钡湿敏陶瓷元件

无机材料学报 2002年第6期17卷 1187-1193页

作者：刘静波王智民韩基新黑龙江大学化学化工学院

以La(OAc)3、Ba(OAc)2、Ti(OnBu)4.起始物,采用共溶-水凝胶法经陈化获得湿凝胶,干燥后制得干凝胶,研磨过筛和埋渗电极、加压成型为素坯,经不同温度和保温时间烧结,制得掺镧LaxBa1-xTiO3陶瓷传感元件系列(x=0.00,0.05,0.10,0.20,0.30),... 详细信息

以La(OAc)3、Ba(OAc)2、Ti(OnBu)4.起始物,采用共溶-水凝胶法经陈化获得湿凝胶,干燥后制得干凝胶,研磨过筛和埋渗电极、加压成型为素坯,经不同温度和保温时间烧结,制得掺镧LaxBa1-xTiO3陶瓷传感元件系列(x=0.00,0.05,0.10,0.20,0.30),测试其阻-湿特性,从中获得了具有良好特性参数的湿敏陶瓷及其主要工艺条件(x=0.10,1350℃/1h),阻-湿特性在工作湿度范围内(相对湿度RH=32.8％～93.6％)的平均灵敏度s=5×104.Ω/RH(％),线性相关因子r=0.998,响应时间τ=110s,湿滞低于4.,湿敏选择性良好:对H2,CH4.CH2=CH2,CH3CH=CH2,CO,C6H6和CH3CH2OH(g)七种气体具有抗干扰性能.应用sEM,AFM及XRF对陶瓷的显微结构和元素含量进行测定,确定了陶瓷的显微组织,晶粒尺寸,晶相结构,表面粗糙度和全元素分析.讨论了掺镧改性的可能机理:La3+不等价取代Ba2+,引起Ti4.捕获一个自由电子而变价为Ti3+,该电子在适宜的陶瓷显微结构下受水分子影响易于进入导带,使掺镧钛酸钡得以半导化,半径较小的La3+取代半径较大的Ba2+,则降低四方晶相的晶格畸变度δ,即晶轴比c/a变小,使四方晶格的不对称性及各向异性降低,从而减少陶瓷烧结后冷却过程中内应力引起的破裂.

关键词：掺镧改性钛酸钡湿敏陶瓷元件湿敏性能显微结构表征共溶-水凝胶法纳米多晶粉体

Research progress in muscle-derived stem cells Literature retrieval results based on international database

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Neural Regeneration Research 2012年第10期7卷 784-791页

作者： Li Zhang, Wei Wang Jinzhou Clinical College of Liaoning Medical university Jinzhou Central Hospital, Jinzhou 121000, Liaoning Province, china Jinzhou Clinical College of Liaoning Medical university Jinzhou Central Hospital Jinzhou 121000 Liaoning Province China.

OBJECTIVE： To identify global research trends of muscle-derived stem cells （MDsCs） using a bibliometric analysis of the Web of science, Research Portfolio Online Reporting Tools of the National Institutes of Health （NIH）, and the Clinical Trials registry database （***）. DATA RETRIEVAL： We performed a bibliometric analysis of data retrievals for MDsCs from 2002 to 2011 using the Web of science, NIH, and ***. sELECTION CRITERIA： Inclusion criteria：（1） Web of science：（a） peer-reviewed articles on MDsCs that were published and indexed in the Web of science. （b） Type of articles： original research articles, reviews, meeting abstracts, proceedings papers, book chapters, editorial material and news items. （c） Year of publication： 2002-2011. （d） Citation databases： science Citation Index-Expanded （sCI-E）, 1899-present; Conference Proceedings Citation Index-science （CPCI-s）, 1991-present; Book Citation Index-science （BKCI-s）, 2005-present. （2） NIH：（a） Projects on MDsCs supported by the NIH. （b） Fiscal year： 1988-present. （3） ***： All clinical trials relating to MDsCs were searched in this database. Exclusion criteria：（1） Web of science：（a） Articles that required manual searching or telephone access. （b） We excluded documents that were not published in the public domain. （c） We excluded a number of corrected papers from the total number of articles. （d） We excluded articles from the following databases： social sciences Citation Index （ssCI）, 1898-present; Arts ＆ Humanities Citation Index （A＆HCI）, 1975-present; Conference Proceedings Citation Index - social science ＆ Humanities （CPCI-ssH）, 1991-present; Book Citation Index - social sciences ＆ Humanities （BKCI-ssH）, 2005-present; Current chemical Reactions （CCR-EXPANDED）, 1985-present; Index Chemicus （IC）, 1993-present. （2） NIH：（a） We excluded publications related to MDsCs that were supported by the NIH. （b） We limited the keyword search to studies that included MDsCs within th

关键词： stem cells muscle-derived regeneration Web of science NIH Clinical Trials bibliometric

Nonlinear optical response of niobium telluride and its application for demonstrating pulsed fiber lasers

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Journal of Materiomics 2024年第2期10卷 355-365页

作者： Xinxin shang Yule Zhang Tuo Li Huanian Zhang Xiaofeng Zou s.Wageh Ahmed A.Al-Ghamdi Han Zhang shuhao si Dengwang Li shandong Province Key Laboratory of Medical Physics and Image Processing Technology Shandong Provincial Key Laboratory of Optics and Photonic DeviceSchool of Physics and ElectronicsShandong Normal UniversityJinan250014China Institute of Microscale Optoelectronics College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China shandong Yunhai Guochuang Cloud Computing Equipment Industry Innovation Co. Ltd.JinanShandongChina school of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo255049China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia

Niobium telluride(NbTe_(2)),a kind of few-layer two-dimensional(2D)transition metal dichalcogenides(TMDs)material,has been theoretically predicted with nonlinear absorption properties and excellent optical ***,we experimentally demonstrated an Er-doped fiber(EDF)laser based NbTe_(2)as saturable absorber(sA).Few-layer NbTe_(2)nanosheets were successfully prepared by adopting the commonly used liquid-phase exfoliation(LPE)*** nonlinear optical response of highly stable few-layer NbTe_(2)was investigated through an open-aperture Z-scan laser measurement,the nonlinear absorption coefficient was 2.4.×10^(-11)m/*** Q-switched and mode-locked operation centered at 1559 nm were recorded based on NbTe_(2)*** pulse duration was varied from 4.88 ms to 1.75 ms,and the adjustable range of repetition frequency is changed from 4..01 kHz to 64.12 kHz in passively Q-switched ***,a constant repetition rate of 5.33 MHz and pulse width of 2.67 ps were observed in mode-locked *** experimental results fully reveal the nonlinear optical prop-erties of NbTe_(2)used in pulsed fiber lasers and broaden its ultrafast applications in the optics field.

关键词： Niobium telluride saturable absorber Z-scan Mode-locked pulse Fiber laser

Ordered Mesoporous Carbon/snO_2 Composites as the Electrode material for supercapacitors

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Journal of wuhan university of Technology(materials science) 2011年第3期26卷 407-411页

作者：刘萍徐菁利 College of Chemistry and chemical Engineering Shanghai University of Engineering Science

A series of composites as electrode materials for supercapacitors were prepared via incipient wetness impregnation method utilizing ordered mesoporous carbon （OMC） and tin （IV） oxide （snO2） with different *** structure and electrochemical properties of the OMC/snO2 composites were characterized by XRD,TEM and cyclic voltammetry （CV）.Pore characteristics were measured by nitrogen adsorption and desorption *** results show that the structure and electrochemical properties of the composites depend mainly on the loading amount of snO2 in the ordered mesoporous *** optimum amount of snCl4.added is found to be 4. % （1.54.g ethanol-based snCl4.5H2O added to 1 g OMC） of the saturated *** specific capacitance of the composite of optimum amount of snCl4.（200 F g-1） is nearly three times of that of the pristine snO2 （72 F g-1） at the scan rate of 5 mV s-1,and its specific capacitance is almost equal to that of the ordered mesoporous carbon （126 F g-1） at the scan rate of 200 mV ***,it has better specific volumetric energy density than OMC due to its higher ***,in the potential range of 0-0.9 V the composite electrode material exhibits a stable cycle life after 500 cycles.

关键词： supercapacitors composite tin oxide electrochemical properties

The Information Integration of CAPP in CIMs

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厦门大学学报（自然科学版） 2002年第S1期41卷 182-183页

作者： ZHANG Yu 1, XIONG Man-chen 2 (CIMs Application and Research Center, faculty of Mechanical and Electr onic Engineering, Kunming university of science and Technology, Kunming 65009 3, china)

This paper analyzes the flow of the process design an d the fountain of the technique data in a manufacturing enterprise, and discusse s the information flows between CAPP and other systems in CIMs, such as CAD syst em and Enterprise Resource Planning (ERP) system. And then, it discusses the pla ns of information integration between CAPP and CAD, as well as between CAPP and ERP. To design the processes of a product requires the manufacture information, such as blank material and machine tool, which is saved in a database in ERP. General ly, a traditional CAPP system considers the information of the manufacturing res ources, such as machine tool, as changeless. However, it is real changing, becau se the resources may be occupied or the machine tool may be under repair. Theref ore, in order to design the processes more reasonably, we must consider the real change of resources in a workshop. Creating a public resource database to suppo rt the real change of resources is put forward in this paper. With the public re source database, the resource integration between CAPP system and ERP is realize d; and by information collections in CAPP system, such as BOM, the material cons umption and man-hour consumption and their output to ERP, the information integ ration between CAPP system and ERP is realized.

关键词： CIMs CAPP ERP information integration techniq ue data

Mass and chemical changes of immobile elements in Yamaghan Occurrence, Zanjan Province, Iran

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中国有色金属学会会刊：英文版 2001年第4期11卷 617-622页

作者： I.Vosoughi Niri (Institute of Applied geophysics, Central south university, Changsha 4.0083, P.R.china) Cent s Univ Inst Appl Geophys Changsha 410083 Peoples R China

Using mass and chemical changes, behavior of some elements have been evaluated in the study area, Yamaghan Occurrence. The techniques using immobile elements can precisely identify altered volcanic rock precursors and measure material changes. The rocks of the study area were affected by hydrothermal alteration. Testing of some compatible incompatible and compatible compatible immobile pairs indicates that Al 2O 3 is the most immobile component in the study area. It means that during the three main stages of hydrothermal alteration (phyllic, intermediate argillic and propylitic) aluminum was the most immobile and titanium was slightly immobile. Increases in mass mostly result from mineralization, silicification or carbonatization as voids and other open space fillings and may have replaced the part of glassy matrix. Mass addition has diluted the immobile elements at constant rates. Mass loss is commonly due to leaching of si, Ca and Na 2O during chloritization and sericitization. The mass loss is recognized by increased proportions of inert minerals such as chlorite and sericite. Mineralographic studies in the study area shows the existence of a supergene zone. Calcocite and covellite are considered enriched minerals. Considering this evidence and mass change results, the enrichment of copper in the circulating fluid is suspected with occasional sulfide precipitation.

关键词： mass and chemical changes immobile elements lithogeochemical Yamaghan

One-neutron stripping process in the^(209)Bi(^(6)Li,^(5)Li)^(210)Bi*reaction reaction

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Nuclear science and Techniques 2024年第6期35卷 120-129页

作者： Gao-Long Zhang Zhen-Wei Jiao Guang-Xin Zhang E.N.Cardozo B.Paes shi-Peng Hu Jian-Qiang Qian Daniele Mengoni Wei-Wei Qu Cong-Bo Li Yun Zheng Huan-Qiao Zhang Hui-Bin sun Nan Wang Chun-Lei Zhang J.J.Valiente-Dobón D.Testov M.Mazzocco A.Gozzelino C.Parascandolo D.Pierroutsakou M.La Commara A.Goasduff D.Bazzacco D.R.Napoli F.Galtarossa F.Recchia A.Illana s.Bakes I.Zanon s.Aydin Gde Angelis M.siciliano R.Menegazzo s.M.Lenzi s.Akkoyun L.F.Canto J.Lubian school of Physics Beihang UniversityBeijing 100191China sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de Física Universidade Federal Fluminense24210-340 NiteróiRio de JaneiroBrazil Laboratorio TANDAR Comisión Nacional de Energía AtómicaBKNA1650 San MartíınArgentina Institute for Advanced study in Nuclear Energy and safety Shenzhen UniversityShenzhen 518060China shenzhen Key Laboratory of Research and Manufacture of High Purity Germanium materials and Fetectors Shenzhen UniversityShenzhen 518060China INFN Sezione di PadovaPaduaItaly Dipartimento di fisica Astronomia dell’Universita di padova PaduaItaly state Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China china Institute of Atomic Energy Beijing 102413China The Key Laboratory of Beam Technology and material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Laboratori Nazionali di Legnaro INFN35020 LegnaroItaly INFN Sezione di Napoli80126 NaplesItaly Dipartimento di Farmacia Universitàdi Napoli“Federico II”80131 NaplesItaly Department of Natural and Mathematical sciences Faculty of EngineeringTarsus University33480 MersinTurkey Physics Division Argonne National LaboratoryLemontILUSA Department of Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de Física Universidade Federal do Rio de JaneiroRio de Janeiro CP 6852821941-972Brazil

One-neutron stripping process between^(6)Li and^(209)Bi was studied at 28,30,and 34.MeV using the in-beamγ-ray spectroscopy ***γ-γcoincident analysis clearly identified twoγ-rays feeding the ground and long-lived isomeric states,which were employed to determine the cross *** one-neutron stripping cross sections were similar to the cross sections of complete fusion in the^(6)Li+^(209)Bi system,but the one-neutron stripping cross sections decreased more gradually at the sub-barrier region.A coupled-reaction-channel calculation was performed to study the detailed reaction mechanism of the one-neutron stripping process in^(6)*** calculations indicated that the first excited state of 5 Li is critical in the actual one-neutron transfer mechanism,and the valence proton of 209Bi can be excited to the low-lying excited state in(^(6)Li,^(5)Li)reaction,unlike in the(d,p)reaction.

关键词： Transfer reaction Weakly bound nuclei Cross section

synthesis and spectrum Properties studies of Tropolone Azo

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复旦学报（自然科学版） 2007年第5期46卷 774-775页

作者： LI Hai-feng, HAI Ji-li, WANG Zi-wei, DONG Jin-long, REN Jian-guo(school of Chemistry & chemical Engineering,shanXi university,Taiyuan 030006,china) school of Chemistry & chemical Engineering ShanXi University Taiyuan 030006

1 Results Tropolone,2-hydroxy-2,4.6-cycloheptatrienone,an isomer of benzoic acid,a seven-membered,non-benzenoid aromatic molecule possessing three double bonds conjugated with a carbonyl *** studies of tropolone forms complexes[1] with many metals became more important because of their potential application in the field of material science,agriculture and *** the course of our studies on the chemistry of 5-substituted tropolone derivatives[2],the synthesis of new tropolone azo derivatives ...

关键词： synthesis tropolone azo 13C NMR