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Solid state interfacial reactions in electrodeposited Ni/Sn couples

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International Journal of Minerals,Metallurgy and Materials 2010年第4期17卷 459-463页

作者： wen-ming tang An-qiang He Qi Liu Douglas-G. Ivey Department of Materials Science and Engineering Hefei University of Technology Hefei 230009 China Department of Chemical and Materials Engineering University of Alberta Edmonton T6G 2G6 Canada

Ni/Sn couples, prepared by sequentially electroplating Ni layers and Sn layers on metallized Si wafers, were employed to study the microstructures and growth kinetics of Ni-Sn intermediate phases, when the Ni/Sn couples were aged at room temperature or armealed at temperatures from 150 to 225℃ for various times. The results show that the NiSn phase and Ni3Sn4 phase are formed, respectively, in the aged couples and annealed couples. The Ni3Sn4 layer is continuously distributed between the Ni and Sn sides in the annealed Ni/Sn couples. The Ni3Sn4 growth follows parabolic growth kinetics with an apparent activation energy of 39.0 kJ/mol.

关键词： electrodeposition solid state reaction diffusion microstructure kinetics

Detection and quantitation of PS20, a phosphorothioate oligodeoxynucleotides in monkey plasma

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Acta Pharmacologica Sinica 2004年第6期25卷 99-104页

作者： ming-mei SHANG, Hai-feng SONG2, Xiu-wen LIU, Zhong-ming tang Department of Pharmacology and Toxicology, the Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China Department of Pharmacology and Toxicology the Institute of Radiation Medicine Academy of Military Medical Sciences

AIM: To establish the method for quantitation of the phosphorothioate oligodeoxynucleotides (S-ODNs) in plasma. METHODS: Two solid-phase extraction columns combined with a strong anion-exchange column were utilized to remove proteins and lipids in plasma, and the salts were removed by a reverse-phase column followed by dialysis with a 2500 Da-cutoff membrane. The concentration of the tested S-ODNs, PS20, and its metabolites extracted from the plasma were determined by the method of non-gel sieving capillary electrophoresis (NGCE) with diode array detection in the presence of internal standard (IS). RESULTS: The method was with good base number specificity. Relative standard deviation % of both intra and inter assay were all less than 10 %, and the total mean recovery was about 91 %. The methodology was successfully used to determine the PK behavior of an anti-tumor antisense S-ODNs in monkeys and identify the metabolites with single base difference. CONCLUSION: The combined method of solid-phase extraction and NGCE could be used to study the pharmacokinetics of S-ODNs, and the main parameters of the methodology met the requirement of PK study.

关键词： antisense oligodeoxyribonucleotides thionucleotides rhesus monkey plasma solid-phase extraction capillary electrophoresis non-gel sieving internal standard

Facile synthesis of thiourea derivatives in ionic liquid

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Chinese Chemical Letters 2007年第3期18卷 258-260页

作者： Min Liang Xiao Feng Huang Chen Zhi Juan Chen Bao Shou Guo Xian Hai Lv wen ming tang Center for Research ＆ Development of Fine Chemicals Guizhou University Guiyang 550025 China Guiyang Environmental Monitoring Center Guiyang 550001 China School of Science Anhui Agricultural University Hefei 230036 China

The synthesis of cinnamoyi thiourea derivatives from cinnamoyl isothiocyanate （CIT） with substituted aniline （RC6H4NH2） was investigated in the mostly used ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, [Bmim][BF4]. Significant enhancements in reactivity, yield and reaction rate were achieved. The products could be recovered by simple filtration. [Bmlm] [BF4] could be recycled simply by removing water under vacuum and reused at least 9 times without significant decrease in activity.

关键词： Ionic liquid Cinnamoyl isotldocyanatc Substimte aniline Cinnamoyl tldourca derivatives Synthesis

Neuroprotective effects of stearic acid against toxicity of oxygen/glucose deprivation or glutamate on rat cortical or hippocampal slices

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Acta Pharmacologica Sinica 2006年第2期27卷 145-150页

作者： Ze-jian WANG Guang-mei LI wen-lu tang ming YIN~2 School of Pharmacy,Shanghai Jiaotong University.Shanghai 200030,China School of Pharmacy Shanghai Jiaotong University Shanghai China

Aim:To observe the effects of stearic acid,a long-chain saturated fatty acidconsisting of 18 carbon atoms,on brain(cortical or hippocampal)slices insultedby oxygen-glucose deprivation(OGD),glutamate or sodium azide(NAN3)in ***:The activities of hippocampal slices were monitored by population spikesrecorded in the CA1 region,In vitro injury models of brain slice were induced by10min of OGD,1 mmol/L glutamate or 10 mmol/L *** 30min of pre-incubation with stearic acid(3-30μmol/L),brain slices(cortical or hippocampal)were subjected to OGD,glutamate or NaN3,and the tissue activities were evalu-ated by using the 2,3,5-triphenyltetrazolium chloride ***886 [5 mmol/L;a noncompetitive inhibitor of proliferator-activated receptor(PPAR-α)] or BADGE(bisphenol A diglycidyl ether;100μmol/L;an antagonist of PPAR-γ)were testedfor their effects on the neuroprotection afforded by stearic ***:Viabilityof brain slices was not changed significantly after direct incubation with ***,glutamate and NaN3injury significantly decreased the viability ofbrain *** acid(3-30 μmol/L)dose-dependently protected brain slicesfrom OGD and glutamate injury but not from NaN3injury,and its neuroprotectiveeffect was completely abolished by ***:Stearic acid can protectbrain slices(cortical or hippocampal)against injury induced by OGD or *** neuroprotective effect may be mainly mediated by the activation of PPAR-γ.

关键词： fatty acid brain slices ischemia glutamate energy metabolism

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第1期68卷 288-296页

作者： Shuai Liu wen-Qiang Xu Ying-Tong Di Man-Cheng tang Ding-Kang Chen ming-ming Cao Yao-wen Chang Hong-Yu tang Chun-Mao Yuan Jun-Bo Yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines(Chinese Academy of Sciences) Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical OncogenomicsPeking University Shenzhen Graduate SchoolShenzhen 518055China Shenzhen Bay Laboratory Shenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Microbial Metabolism School of Life Sciences&BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical UniversityGuiyang 550014China Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest ChinaKunming Institute of BotanyChinese Academy of SciencesKunming 650201China Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical SciencesBeijing 100730China

In the intricate process of natural product biosynthesis,a metabolon can enhance metabolic flux by associating sequential enzymes.A fungal metabolon,comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G,is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide *** notoamide E as a substance,Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation,followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium ***,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol *** provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词： metabolon Diels-Alder reaction semipinacol rearrangement biosynthesis notoamides spiro polycyclic alkaloids

Activation of peroxymonosulfate by sustainable biomass-based carbon nanotubes for controlling the spread of plant viruses in water environments

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Journal of Environmental Sciences 2025年第3期149卷 99-112页

作者： Jian tang Yujie Wang JunMa Yujie Chen ming Chen College of Resources and Environment Yangtze UniversityWuhan 430100China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Chongqing School University of Chinese Academy of SciencesChongqing 400714China School of Geography and Tourism Chongqing Normal UniversityChongqing 400714China

With the increasing demand for water in hydroponic systems and agricultural irrigation,viral diseases have seriously affected the yield and quality of *** removing plant viruses in water environments,virus transmission can be prevented and agricultural production and ecosystems can be *** so far,there have been few reports on the removal of plant viruses in water ***,in this study,easily recyclable biomass-based carbon nanotubes catalysts were synthesized with varying metal activities to activate peroxymonosulfate(PMS).Among them,the magnetic 0.125Fe@NCNTs-1/PMS system showed the best overall removal performance against pepper mild mottle virus,with a 5.9 log_(10)removal within 1 ***,the key reactive species in the 0.125Fe@NCNTs-1/PMS system is^(1)O_(2),which can maintain good removal effect in real water matrices(river water and tap water).Through RNA fragment analyses and label free analysis,it was found that this system could effectively cleave virus particles,destroy viral proteins and expose their *** capsid protein of pepper mild mottle virus was effectively decomposed where serine may be the main attacking sites by^(1)O_(2).Long viral RNA fragments(3349 and 1642 nt)were cut into smaller fragments(∼160 nt)and caused their *** summary,this study contributes to controlling the spread of plant viruses in real water environment,which will potentially help protect agricultural production and food safety,and improve the health and sustainability of ecosystems.

关键词： Pepper mild mottle virus Removal Plant virus spread Biomass-based carbon nanotubes Water environments

Process optimization,microstructures and mechanical/thermal properties of Cu/Invar bi-metal matrix composites fabricated by spark plasma sintering

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Transactions of Nonferrous Metals Society of China 2021年第10期31卷 3050-3062页

作者： Qiang-qiang NIE Guo-hong CHEN Bing WANG Lei YANG wen-ming tang School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Electric Power Research Institute State GridAnhui Electric Power Co.Ltd.Hefei 230601China The 43 Research Institute of China Electronics Technology Group Corporation Hefei 230088China Anhui Province Key Laboratory of Microsystem Hefei 230088China Hefei Shengda Electronic Technology Industry Co. Ltd.Hefei 230088China Engineering Research Center of High-performance Copper Alloy Materials and Processing Ministry of EducationHefei 230009China

An orthogonal experiment scheme was designed to investigate the effects of the Cu content,compaction pressure,and sintering temperature on the microstructures and mechanical and thermal properties of(30−50)wt.%Cu/Invar bi-metal matrix composites fabricated via spark plasma sintering(SPS).The results indicated that as the Cu content increased from 30 to 50 wt.%,a continuous Cu network gradually appeared,and the density,thermal conductivity(TC)and coefficient of thermal expansion of the composites noticeably increased,but the tensile strength *** increase in the sintering temperature promoted the Cu/Invar interface diffusion,leading to a reduction in the TC but an enhancement in the tensile strength of the *** compaction pressure comprehensively affected the thermal properties of the *** 50wt.%Cu/Invar composite sintered at 700℃ and 60 MPa had the highest TC(90.7 W/(m·K)),which was significantly higher than the TCs obtained for most of the previously reported Cu/Invar composites.

关键词： spark plasma sintering(SPS) Cu/Invar bi-metal composite microstructure interface diffusion mechanical property thermal property

Low-profile,low sidelobe array antenna with ultrawide beam coverage for UAV communication

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Chinese Journal of Aeronautics 2025年第1期38卷 444-454页

作者： Mei LI Zhiliang SHANG Lin PU ming-Chun tang Lei ZHU School of Microelectronics and Communication Engineering Chongqing UniversityChongqing 400044China Department of Electrical and Computer Engineering University of MacaoMacao SAR 999078China

This paper presents a design method to implement an antenna array characterized by ultra-wide beam coverage,low profile,and low Sidelobe Level(SLL)for the application of Unmanned Aerial Vehicle(UAV)air-to-ground *** array consists of ten broadside-radiating,ultrawide-beamwidth elements that are cascaded by a central-symmetry series-fed network with tapered currents following Dolph-Chebyshev distribution to provide low ***,an innovative design of end-fire Huygens source antenna that is compatible with metal ground is presented.A low-profile,half-mode Microstrip Patch Antenna(MPA)is utilized to serve as the magnetic dipole and a monopole is utilized to serves as the electric dipole,constructing the compact,end-fire,grounded Huygens source ***,two opposite-oriented end-fire Huygens source antennas are seamlessly integrated into a single antenna element in the form of monopole-loaded MPA to accomplish the ultrawide,broadside-radiating *** consideration has been applied into the design of series-fed network as well as antenna element to compensate the adverse coupling effects between elements on the radiation *** indicates an ultrawide Half-Power Beamwidth(HPBW)of 161°and a low SLL of-25 dB with a high gain of 12 d Bi under a single-layer *** concurrent ultrawide beamwidth and low SLL make it particularly attractive for applications of UAV air-to-ground communication.

关键词： Array antenna Broad beam Fan beam Low sidelobe level Chebyshev synthesis UAV communication

Effect of porosity and interface structures on thermal and mechanical properties of SiC_p/6061Al composites with high volume fraction of SiC

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 941-949页

作者： Yu HONG Wu-jie WANG Jia-qin LIU wen-ming tang Yu-cheng WU School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Institute of Industry & Equipment Technology Hefei University of TechnologyHefei 230009China Laboratory of Nonferrous Metal Material and Processing Engineering of Anhui Province Hefei University of TechnologyHefei 230009China National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology Hefei University of TechnologyHefei 230009China

50 vol.% SiCp/Al composites with high thermal and mechanical properties were successfully produced by spark plasma sintering technique. The influences of sintering temperature on the thermal conductivity, coefficient of thermal expansion and bending strength of the SiCp/Al composites were carefully investigated. The results show that the SiCp/Al composites sintered at 520℃ exhibits a thermal conductivity of 189 W/(m·K), a coefficient of thermal expansion (50.200℃) of 10.03×10^-6 K^-1 and a bending strength of 649 MPa. The high thermal and mechanical properties can be ascribed to the nearly full density and the well interfacial bonding between the alloy matrix and the SiC particles. This work provides a promising pathway for producing materials to meet the needs of high performance electronic packaging.

关键词： spark plasma sintering SiCp/6061Al composites thermal properties mechanical properties