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Structure, photocatalytic and antibacterial activity study of Meso porous Ni and S co-doped TiO2 nano material under visible light irradiation

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1630-1641页

作者： K.V.Divya Lakshmi T.Siva Rao J.Swathi Padmaja I.Manga Raju M.Ravi Kumar Department of Inorganic and Analytical Chemistry Andhra University

Undoped and Ni–S co-doped mesoporous TiO2 nano materials were synthesized by using sol–gel method.The characteristic features of as prepared catalyst samples were investigated using various advanced spectroscopic and analytical techniques.The characterization results of the samples revealed that all the samples exhibited anatase phase(XRD),decreasing band gap(2.68 eV)(UV–Vis-DRS),small particle size(9.2 nm)(TEM),high surface area(142.156 m^2·g^-1)(BET),particles with spherical shape and smooth morphology(SEM);there is a frequency shift observed for co-doped sample(FT-IR)and the elemental composition electronic states and position of the doped elements(Ni and S)in the TiO2 lattice analyzed by XPS and EDX.These results supported the photocatalytic degradation of Bismarck Brown Red(BBR)achieved with in 110 min and also exhibited the antibacterial activity on Staphylococcus aureus(MTCC-3160),Pseudomonas fluorescence(MTCC-1688)under visible light irradiation.

关键词： Sol–gel Ni–S co-doped TiO2 Photocatalysis under visible light Degradation of Bismarck Brown Red Antibacterial activity

The Mechanical Analysis and Experimental Study of Shock Wave Effect of Electrical Discharge under Water In Filth Cleaning

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上海交通大学学报 2004年第Z2期38卷 229-234页

作者： Deng Qilin Zhang Lei Zhou Jinjin Shanghai Jiaotong University Shanghai 200030 China Dalian University of Technology Dalian 116024 China Dalian University of Technology Dalian 116024 China

Filth adhering to metal pipes can be cleaned by shock wave generated by electrical discharge under water. The mechanism of shock wave effect of electrical discharge under water on filth cleaning is analyzed by building a mechanical model. A metal pipe coated with cement to simulate real filth is cleaned by using electrical discharge under water. The experimental results confirm the mechanical analysis and also show the technology of electrical discharge under water is an very effective method for filth cleaning.

关键词： shock wave filth cleaning effect of electrical discharge under water

Comparison of Reference Genes for Transcriptional Studies in Postmortem Human Brain Tissue under Different Conditions

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Neuroscience Bulletin 2019年第2期35卷 225-228页

作者： Qing Zhang Hanlin Zhang Fan Liu Qian Yang Kang Chen Pan Liu Tianyi Sun Chao Ma Wenying Qiu Xiaojing Qian Department of Human Anatomy Histology and EmbryologySchool of Basic Medicine Peking Union Medical CollegeInstitute of Basic Medical Sciences Chinese Academy of Medical Sciences Joint Laboratory of Anesthesia and Pain Peking Union Medical College Chinese Academy of Medical Sciences Eight-Year MD Program Peking Union Medical College

Dear Editor Research on neurodegenerative diseases is a hot topic worldwide[1],and MRI,genetics and epigenetics,and animal models have been commonly used.Considering species differences,research on human brain samples is irreplaceable(2)Many countries and regions have built brain banks to collect and store brain tissue from donors.Samples provided by a brain bank can be used to study synaptic structure,protein,DNA,RNA[3,4],and lipids to illuminate the pathological mechanisms underlying neurodegenerative diseases.When brain tissue is used for gene expression research,the quantitative real-time polymerase chain reaction(RT-qPCR)is an accurate method,which simultaneously amplifies and quantifies the expression of target genes by measuring the intensity of fluorescence in each PCR cycle.

关键词： TBP Comparison of Reference Genes for Transcriptional Studies in Postmortem Human Brain Tissue under Different Conditions

Synthesis of Ce:YAG Phosphor via Homogeneous Precipitation under Microwave Irradiation

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Journal of Rare Earths 2006年第Z2期24卷 183-186页

作者：王勇袁鹏徐红燕王介强 School of Material Science and Engineering Jinan University

Ultra-fine Ce:YAG phosphors were prepared by homogeneous precipitation under microwave irradiation method. The formation of Ce:YAG was investigated by means of XRD and DTA/TG. The purified YAG crystallized phase was obtained at a lower temperature (1100 ℃). Basically spherical Ce:YAG powders were indicated from TEM images, and the size of the particles is about 80 nm. Two peaks of 436 and 473 nm can be seen from the excitation spectrum in the range of 402～510 nm. A broad emission band located at 480～630 nm shows the phosphors prepared by this method have good emission properties.

关键词： Ce∶YAG homogeneous precipitation under microwave irradiation phosphors rare earths

FEM Analysis of Effect of Die Angle on Tube Inversion Forming Process under Conical Die

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Journal of Materials Science & Technology 2003年第Z1期19卷 234-236页

作者： Zhichao SUN He YANG College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China

Tube inversion including free deformation under conical die is an advanced forming process for manufacturing complicated thin-walled parts with high strength/weight ratio, high efficiency, and good flexibility for size changing.However, the successful reality of forming process, the change of deforming mode and shape and size of part formedare mainly on the die angle. Based on the analysis of the forming process, the model of rigid-plastic FEM (finiteelement method) is established and a numerical simulation system is developed. The effect of die angle on the tubeinversion forming process is investigated with the code developed. The results of the effect of half die angle on shapeof free deformation zone and on deforming load are obtained. There is an optimal die angle (about 75 deg), whichmakes the forming load minimum.

关键词： Tube inversion under conical die, Rigid-plastic FEM, Die angle, Free deformation

Mining subsidence control by solid backfilling under buildings

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中国有色金属学会会刊：英文版 2011年第S3期21卷 670-674页

作者： ZHA Jian-feng1, 2, 3, GUO Guang-li1, 2, FENG Wen-kai3, WANG Qiang1, 2 1. Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping, China University of Mining and Technology, Xuzhou 221116, China 2. Jiangsu Key Laboratory of Resources and Environmental Information Engineering, China University of Mining and Technology, Xuzhou 221116, China 3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping China University of Mining and Technology Xuzhou 221116 China Jiangsu Key Laboratory of Resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

Solid backfilling mining can reduce the buildings' damage caused by mining greatly. The reduction of subsidence value, the slow advancing speed and the subsidence caused by backfilling body compaction are the main reasons that solid backfilling mining velocity decreases significantly. Based on the research of mechanism, some principles on subsidence control of solid backfilling mining under buildings were proposed. The equivalent mining height was designed according to the fortification criteria of buildings and their attachment structures, which enables the ground movement and deformation caused by mining to be less than the corresponding fortification criteria.

关键词： solid backfilling mining subsidence control mining under buildings

Creep testing and viscous behavior research on carbon constructional quality steel under high temperature

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Journal of Central South University 2008年第S1期15卷 206-209页

作者：余敏罗迎社彭相华 Institute of Rheological Mechanics and Material Engineering Central South University of Forestry and Technology Swan College of Central South University of Forestry and Technology

Creep tests under at a certain temperature and different stress levels were performed on two carbon constructional quality steels at a certain stress level and different temperatures,and their creep curves at high temperature were obtained based on analyzing the testing data.Taking 45 steel at a certain temperature and stress as the example,the integral creep constitutive equation and the differential stress-strain constitutive relationship were established based on the relevant rheological model,and the integral core function was also obtained.Simultaneously,the viscous coefficients denoting the viscous behavior in visco-plastic constitutive equation were determined by taking use of the creep testing data.Then the viscous coefficients of three carbon steels(20 steel,35 steel and 45 steel) were compared and analyzed.The results show that the viscosity is different due to different materials at the same temperature and stress.

关键词： carbon constructional quality steel creep under high temperature constitutive equation integral core function viscosity

Preparation of carbon nanotube/epoxy composite films with high tensile strength and electrical conductivity by impregnation under pressure

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Frontiers of Materials Science 2019年第2期13卷 165-173页

作者： Heng CHEN Yun CHEN Hang ZHAN Guang WU Jian Ming XU Jian Nong WANG School of Mechanical and Power Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China Shanghai Institute of Space Power Sources 2965 Dongchuan Road Shanghai 200245 China

Based on the production of a carbon nanotube (CNT) assembly, a new technique is developed for preparing CNT/epoxy (EP) composite films with high tensile strength and electrical conductivity. CNTs are synthesized by floating catalyst spray pyrolysis. After self-assembling into a hollow cylindrical assembly, CNTs are drawn and wound on a rotating drum to form a uniform CNT film. EP resin solutions of different concentrations are used to fill into the pores within the film under different pressures and form composite films after hot-press curing. The permeability of the EP resin and thus the interfacial bonding between the CNT and the EP resin are studied by varying the concentration of the EP resin solution and the pressure used for impregnation. under optimal preparation conditions, the composite film contains CNTs of a high content of 59 wt.%, and shows a high tensile strength of 1.4 GPa and a high electrical conductivity of 1.4x10^5 S·m^-1, 159% and 309% higher than those of the neat CNT film, respectively.

关键词： carbon nanotube alignment resin matrix composite tensile strength impregnation under pressure

THE　SYNTHESIS　OF　ARYLOXY－CARBOXYLIC　ACID　under　MICROWAVE，SOLID　BASE　AS　A　SUPPORT

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Chinese Chemical Letters 1996年第6期7卷 527-530页

作者： Wang, ZY Shi, HJ Shi, HX Zhang, ZY ANHUI NORMAL UNIV DEPT CHEMWUHU 241000ANHUIPEOPLES R CHINA LANZHOU UNIV DEPT CHEMLANZHOU 730000PEOPLES R CHINA

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关键词： under SOLID