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Action of the Selenomorpholine Compounds on the Bacterium Growth by Microcalorimetry

Chinese Journal of Chemistry 2002年第9期20卷 829-833页

作者：李曦刘义吴军屈松生 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan Hubei 430070 China Department of Chemistry Wuhan University Wuhan Hubei 430072 China

b Department of Chemistry, Wuhan University, Wuhan, Hubei 430072, China The action of β ( N selenomorpholine) ethyl phenyl ketone hydrochloride and 4 ( N selenomorpholine) 2 butanone hydro chloride on Escherichia coli and Staphylococcus aureus was studied by microcalorimetry. Differences in their capacities to affect the metabolism of this bacterium were observed. The kinetics shows that the selenomorpholine compounds had action on the metabolism process of Escherichia coli and Staphylococcus aureus. The rate constant ( k ) of the studied bacterium in the presence of the drugs are concentration dependant. The growth rate constants decrease with an increase in the mass of the selenomorpholine compounds, but their relationship is different. As deduced from the rate constant ( k ) of the studied bacterium (in log phase) and the half inhibitory concentration (IC 50 ), the experimental results reveal that the studied selenomorpholine compounds all have good antibiotic activity and better antibacterial activity on Staphylococcus aureus than on Escherichia coli.

关键词： selenomorpholine compounds bacterium metabo lism antibacterial activity microcalorimetry

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synthesis and sintering of ZrNiSn thermoelectric compounds

Synthesis and sintering of ZrNiSn thermoelectric compounds

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International Conference on Thermoelectrics (ICT)

作者： Q. Shen L.M. Zhang L.D. Chen T. Goto T. Hirai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China State Key Laboratory of High Performance Ceramics and Superfine Structure Shanghai Institute of Ceramics Shanghai China Institute for Materials Research University of Tohoku Sendai Japan

In contrast to the commonly used arc melting method, samples in the present paper were prepared by the solid-state reaction from element powders at 1173K under a flowing argon atmosphere for 4-7 days. The constituent phases and the element compositions were determined and showing that samples were of single phase and stoichiometric. ZrNiSn powder was then consolidated by using the spark plasma sintering technique. The effect of sintering temperature and holding time on the density was discussed. It is found that, dense ZrNiSn compounds with fine grain size and homogeneous microstructure were achieved under the condition of 1123K-40MPa-25min.

关键词： Thermoelectricity Powders Plasma temperature Solid state circuits Argon Atmosphere Sparks Plasma density Grain size Microstructure

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Millimeter wave processing of materials in IECAS

Millimeter wave processing of materials in IECAS

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International Conference on Infrared and Millimeter Waves

作者： Jirun Luo Guangjiang Yuan Yinong Su Sushix Zhao Hanxing Liu Shixi Ouyang Wei Pan Deshun Wu Yuantao Luan Yansheng Zhang Lei Zheng Ersheng Wu Zhao Zhang The Institute ofElecnonics Chinese Academy and Sciences Beijing China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Qepamnent of Materials Science and Engineering Tsinghua University Beijing China

ISBN: (纸本)0780374231

Millimeter wave processing of materials is a method which has wide application prospect for improving material characteristics. In this paper, the investigated results of millimeter wave processing of materials in IECAS, such as millimeter wave sintering of Al/sub 2/O/sub 3/, ZnO, Nd/sub 2/Ti/sub 3/O/sub 9/, and chemical syntheses of spinels LiMn/sub 2/O/sub 4/ and LiCo/sub 0.1/Mn/sub 1.99/O/sub 3.92/S/sub 0.08/, as cathode materials of Li-ion batteries, with millimeter wave heating are presented.

关键词： Ceramics Millimeter wave technology Zinc oxide Temperature materials science and technology Cathodes Batteries Heating Acceleration Furnaces

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Fabrication of a W/W-Mo/Mo System Layered Flier-Plate Material

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材料科学技术学报(英文版) 2001年第z1期17卷 S127-S130页

作者： Chuanbin WANG Qiang SHEN Lianmeng ZHANG State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070 China

A kind of W/W-Mo/Mo system layered flier-plate material (LFP) was fabricated in this study by the methods of powder metallurgy and bonding together. Such LFP had high parallelism,planeness and densification and its density varied from 17.25x103 kg/m3 to 10.22x103 kg/m3 through a total thickness of 3.0 mm. The W-Mo interlayer of this LFP was obtained by hot-press sintering and its densification at 1573 K was studied. Then by using additives 4Ni-3Cu (in wt pct), the LFP was fabricated under 1573 K-30 MPa-60 min. The mechanism of the interfacial bonding of the W/W-Mo/Mo system LFP was also mainly investigated.

关键词： powder metallurgy methods of

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Fabrication of A1/A12O3 Composites and FGM

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材料科学技术学报（英文版） 2001年第6期17卷 646-648页

作者： Hong TAO Chengji Deng Lianmeng ZHANG Runzhang YUAN State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Al/Al2O3 composites of different ratios were hot-press sintered at 575～640℃ under a pressure of 30 MPa for 2 h in a vacuum furnace. It was found that the relative density of the Al/Al2O3composites could be increased evidently with the rise of sinter temperature. No reaction occurred between Al and Al2O3 at the sinter temperatures. Under 640℃-30 MPa-2 h experimental condition, Al/Al2O3 system FGM was successfully fabricated, and its density range changed quasi-continuously from 2.887x103 kg/m3 to 3.1909x103 kg/m3 within the middle 1.0 mmthickness range.

关键词： relative density

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A Quantum Chemistry Study of Inhibition Properties of Imidazole and Its Derivatives on Iron Surface Corrosion

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Chemical Research in Chinese Universities 2001年第3期17卷 305-310页

作者： YAN Xiao-ci XIA Wen-bing LIU Jie OU YANG-li LUO Ming-dao YANG Feng MIN Xin-min Department of Chemistry Wuhan UniversityWuhan 430072P.R.China National Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070P.R.China

The geometries of imidazole and its derivatives were respectively optimized by using ab initio method, and the molecular orbital energy levels and the charge densities were obtained for their optimum geometries. The frontier orbital energy levels, and the net charges of N (1) atom and the imidazole ring of those molecules were obtained with ab initio and SCC-DV-Xα methods. It was found that the inhibition properties of those compounds change with the highest occupied molecular orbital energy levels, and the net charges of N (1) atom. We took four iron atoms on the crystal plane (100) of α-iron as the surface which was used to study the adsorption towards the inhibitors. The adsorption models of the inhibitor to be adsorbed on the Fe-cluster surface were optimized with SCC-DV-Xα method. It turns out that the most favorable model is that the inhibitor molecule is adsorbed on the Fe-cluster surface in an inclined state. The calculation shows that the stabilization energies of the systems are well correlated with the inhibition efficiencies.

关键词： Imidazole ab initio SCC-DV-Xα algorithm Fe-cluster surface Inhibition efficiency

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Nanocomposite Films of MoO3 Xerogel with Poly (ethylene oxide) (PEO) Intercalation

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材料科学技术学报（英文版） 2001年第z1期17卷 S124-S126页

作者： Yongsheng HU WEN Chen Qing XU Runzhang YUAN Institute of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070 China

(PEO)xMoO3·nH2O(x=0～2) nanocomposite films were prepared by ion exchange method and polymer solution direct intercalation in sol-gel route. The synthesis and structure of the films were investigated by XRD, DSC, FTIR, etc. The results show that MoO3 xerogel has a layered structure, which arranges in b-direction. The interlayer distance of MoO3 xerogel increases from 0.690 nm at x=0 to 1.308 nm at x=2 after heat treatment. PEO can be completely intercalated into the interlayer at x=0.5～1 and has strong interaction with MoO3 host.

关键词： structure of the films interlayer distance layered structure polymer solution heat treatment ion exchange

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Grain Boundary Diffusion of Oxygen in c-Textured YBa2Cu3O7-δ Films

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中国地质大学学报(英文版) 2001年第3期12卷 221-223页

作者： Li Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070

The dislocation structure in magnetron sputtered c-textured YBCO films deposited on (100)SrTiO3 substrates consists of vertical (//c axis) screw dislocation forests together with layered horizontal (|caxis) edge dislocation net-works. It is found that in the oxygenation process in YBCO films, oxygen diffusion is enhanced greatly by the short circuit paths which we suggest to be the horizontally ( c axis) layered edge dislocation net-works. Diffusion equation for oxygenation was solved with the help of Fishers theory of grain boundary diffusion, and an active energy 1.16 ev.``

关键词： oxygen diffusion YBa2 Cu3 O7 film

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synthesis and growth mechanism of NaFe/sub 4/P/sub 12/ nanowires

Synthesis and growth mechanism of NaFe/sub 4/P/sub 12/ nanow...

引用

International Conference on Thermoelectrics (ICT)

作者： Xiaobo Hu Hong Liu Jiyang Wang Huaidong Jiang Shanrong Zhao Dongming Zhang Mingyuan Gu Minhua Jiang State Key Laboratory of Crystal Materials Shandong University Jinan China State Key Laboratory of Advanced Technology of Materials Synthesis and Processing Wuhan University of Technology Wuhan China State Key Laboratory of Metal Matrix Composite Shanghai Jiaotong University Shanghai China

Filled skutterudite NaFe/sub 4/P/sub 12/ single crystal nanowires were synthesized by using a hydrothermal-reduction-alloying method. X-ray diffraction (XRD), Electron diffraction (ED), Raman scattering, as well as elemental analysis were used to characterize the product. High-resolution transmission electron microscope (HRTEM) was used to investigate the microstructure of the nanowire. A growth mechanism of NaFe/sub 4/P/sub 12/ nanowire was proposed.

关键词： Nanowires Iron Crystallization Wire Magnetic fields Image resolution Magnetic cores Atomic layer deposition X-ray scattering Cerium

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Preparation and thermoelectric properties of polyaniline/NaFe/sub 4/P/sub 12/ composite

Preparation and thermoelectric properties of polyaniline/NaF...

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International Conference on Thermoelectrics (ICT)

作者： Hong Liu Jiyang Wang Xiaobo Hui Huaidong Jiang Shanrong Zhao Qiang Li R.I. Boughton Minhua Jiang State Key Laboratory of Advanced Technology of Materials Synthesis and Processing Wuhan Technology University Wuhan P. R. China State Key Laboratory of Crystal Materials Shandong University Jinan P. R. China Shandong University Jinan Shandong CN Center for Materials Science Green State University Bowling Green U.S.A

Polyaniline/NaFe/sub 4/P/sub 12/ whiskers and polyaniline/NaFe/sub 4/P/sub 12/ nanowire composites were prepared by an in situ compounding method. X-ray diffraction (XRD), infrared spectra, thermal gravity analysis (TGA) transmission electron microscope (TEM) and electron diffraction (ED) were used to characterize polyaniline and the composites. Polyaniline can grow on the surface of NaFe/sub 4/P/sub 12/ whisker and forms a novel "brush" structure. The mechanism of the forming of the "brush" structure is suggested. The conductivity and Seebeck coefficient of polyaniline and the composites were measured.

关键词： Thermoelectricity Thermal conductivity Conducting materials Crystalline materials Polymers Inorganic materials materials science and technology Laboratories Composite materials X-ray diffraction

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