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Resonance scattering spectral detection of ultratrace IgG using immunonanogold-HAuCl_4-NH_2OH catalytic reaction

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science china Chemistry 2008年第5期51卷 440-446页

作者： JIANG ZhiLiang1,2,ZHANG ShengSen1,LIANG AiHui2 & HUANG SiYu1 1 School of Environment and Resource,Guangxi Normal university,Guilin 541001,china 2 Department of material and {3. engineering,Guilin university of Technology,Guilin 541001,china School of Environment and Resource Guangxi Normal University Guilin China Department of material and chemical engineering Guilin University of Technology Guilin China

Nanogold particles of 10 nm were used to label goat anti-human IgG (GIgG) to obtain nanogold-labeled GIgG (AuGIgG). In a citrate-HCl buffer solution of pH 2.27,AuGIgG showed a strong catalytic effect on the reaction between HAuCl4 and NH2OH to form big gold particles that exhibited a resonance scatter-ing (RS) peak at 796 nm. Under the chosen conditions,AuGIgG combined with IgG to form immuno-complex AuGIgG-IgG that can be removed by centrifuging at 16000 r/min. AuGIgG in the centrifuging solution also showed catalytic effect on the reaction. On those grounds,an immunonanogold catalytic RS assay for IgG was designed. With addition of IgG,the amount of AuGIgG in the centrifuging solution decreased; the RS intensity at 796 nm (I796 nm) decreased linearly. The decreased intensity ΔI796 nm was linear with respect to the IgG concentration in the range of 0.08-16.0 ng·mL-1 with a detection limit of 0.02 ng·mL-1. This assay was applied to analysis of IgG in sera with satisfactory sensitivity,selectivity and rapidity.

关键词： immunonanogold nanocatalysis gold-enhancement resonance scattering assay IgG

Inducing effect of Pb(Zr_(0.4)Ti_(0.6))O_3.thin film derived by different processes in BiFeO_3.Pb(Zr_(0.4)Ti_(0.6))O_3.multilayer capacitor at room temperature

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science china(Technological sciences) 2009年第1期52卷 10-14页

作者： XIE Dan1, ZANG YongYuan1, LUO YaFeng1, REN TianLing1, LIU LiTian1 & DANG ZhiMin2 1 Institute of Microelectronics, Tsinghua university, Beijing 100084, china 2 College of material {3. and engineering, Beijing university of chemical Technology, Beijing 100029, china Institute of Microelectronics Tsinghua University

BiFeO3.PZT multilayer capacitor was prepared on Pt(100)/Ti/SiO2/Si(100) substrate. PZT buffer layer was derived by MOCVD method (label: PZT1) and sputtering method (label: PZT2) respectively. XRD analysis indicated that high (110) orientation of BFO in the BFO/PZT1 structure was achieved. SEM analysis indicated a better microstructure in the BFO/PZT1 structure compared with BFO/PZT2. The remnant polarization of the BFO/PZT1 was 82.5 μC/cm2 at an applied voltage of 8 V, compared with that of 25.2 μC/cm2 in the BFO/PZT2 structure. The BFO/PZT1 multilayer exhibited little polarization fatigue (<1.5%) upon 1×1010 switching cycles, at an applied voltage of 4 V. The leakage current density was about 2×10?7 A/cm2 at an applied voltage 4 V, in the BFO/PZT1 capacitor. All the results indicated that PZT can act as an inducing layer to the BFO and the MOCVD derived PZT has more inducing effect to the BFO thin film at room temperature.

关键词： BFO PZT MOCVD properties FeRAM

Proton induced X-ray emission (PIXE) analysis of sources of porcelain body of Ru Guan and Jun Guan porcelains

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science china(Physics,Mechanics & Astronomy) 2006年第4期49卷 411-420页

作者： LI Guoxia1, ZHAO Weijuan1, LI Rongwu2, SUN Hongwei1, GUO Min1, WANG Yanfang1, LIU Hui1, ZHAO Qingyun3. SUN Xinmin3. ZHAO Wenjun3.& CHENG Huansheng4 1. faculty of Physical engineering, Zhengzhou university, Zhengzhou 450052,{3. 2. Department of Physics, Beijing Normal university, Beijing 100875,{3. 3. Institute of Cultural Relic and Archaeology of Henan Province, Zhengzhou 450000,{3. 4. Institute of Modern Physics, Fudan university, Shanghai 20043.,{3. faculty of Physical engineering Zhengzhou University Zhengzhou China Department of Physics Beijing Normal University Beijing China Institute of Cultural Relic and Archaeology of Henan Province Zhengzhou China Institute of Modern Physics Fudan University Shanghai China

3. samples of Ru Guan porcelain body and 50 samples of Jun Guan porcelain body (both kinds being in different body colors) were selected with the purpose of finding out the source of raw materials and their classification relationship so as to search for ways of non-destructive discrimination. Proton induced X-ray emission (PIXE) has been applied to these samples to determine their chemical elements. The data of seven major chemical elements collected from these samples were further studied through fuzzy cluster analysis. Results indicate that the origin of raw materials of Jun Guan porcelain body samples is comparatively more concentrated in certain places, while that of Ru Guan porcelain body samples is scattered about. The places of origin of raw materials of the majority of Ru Guan and Jun Guan porcelain body samples have something in common, but some differences still exist. It might be an important way for non-destructive discrimination among Ru Guan and Jun Guan porcelains by combining PIXE with fuzzy cluster analysis.

关键词： Ru Guan and Jun Guan porcelain, source of porcelain body, PIXE, fuzzy cluster analysis, non-destructive discrimination.

Comparison of Structure and Properties among Various PAN Fibers for Carbon Fibers

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Journal of materials science & Technology 2005年第3期21卷 376-380页

作者： Dongxin HE, Chengguo WANG, Yujun BAI and Bo ZHU College of materials science and engineering, Shandong {3., Jinan 250061, china College of materials science and engineering Shandong University Jinan 250061 China

To find out the high-quality polyacrylonitrile (PAN) fibers, some differences are sought by comparing domestic PAN fibers with the foreign ones. X-ray diffractometer (XRD), transmission electron microscope (TEM), Fourier transform infrared (FT-IR) spectrometer, elemental analyzer, tensile-testing machine and high-temperature differential scanning calorimeter (DSC) are used to characterize the individual microstructure, chemical structure, elemental content, mechanical properties and thermal properties. It is found that high-quality PAN fibers have high density, lower titre, higher or adequate tensile strength, and they also have better conglomeration structure, smaller crystal dimension with dispersive distribution, less microvoids and flaws.

关键词： Polyacrylonitrile (PAN) fiber Carbon fiber Structure Properties

Synthesis and Luminescence Properties of Red Phosphor CaO:Eu^(3.)

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Journal of wuhan university of Technology(materials {3.) 2009年第1期24卷 20-24页

作者：康明 School of material science and engineering Southwest University of Science and Technology College of materials science and engineering Sichuan University

Ca（NO3.2·4H2O, Eu（NO3.3.and H2C2O4·2H2O were adopted to synthesize CaO： Eu3. with the chemical co-precipitation method, and the effects of the calcination temperature and Eu3. doping concentration on the phosphor structure and its luminescent properties were investigated by TG-SDTA, XRD, and PL-PLE. The results confirm that the Eu3. ions as luminescent centers substi-tutes Ca2＋ sites without changing the crystal structure of cubic CaO. The optimum calcination tem-perature and the optimum concentration of Eu3. are 1 100 ℃ and 1 mol%, respectively, under which the best crystallinity and highest PL intensity appeared. The maximum emission wavelength is 592 nm （5D0→7F1） which is excited by xenon lamp with the wavelength of 200-280 nm, indicating that the Eu3. ion mainly locates in the symmetric position （Oh） in the crystal lattice of CaO.

关键词： red phosphor CaO Eu^3. co-precipitation method rare earths

Controllable synthesis of Ni-catalyzed tetragonal tungsten nanowires via chemical vapor deposition

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Progress in Natural science:materials International 2012年第5期22卷 514-519页

作者： Chao Wang a,Yuehui He a,Chaoqun Peng b,Shiliang Wang a,c,Xinli Liu a a State Key Laboratory of Powder Metallurgy,Central South university,Changsha 410083.china b School of material {3. and engineering,Central South university,Changsha 410083.china c School of Physics {3. and Technology,Central South university,Changsha 410083.china State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China School of material science and engineering Central South University Changsha 410083 China School of Physics science and Technology Central South University Changsha 410083 China

Tetragonal single-crystal tungsten nanowires were successfully synthesized by chemical vapor deposition(CVD) catalyzed by Ni *** influences of the catalysts,temperature and growth time on the formation of the nanowires were *** was found that the tetragonal tungsten nanowires(WNWs) arrays were obtained by deterministic growth from the ordered Ni catalyst particles with one-to-one relation in size and position between the catalysts and *** large-scale tungsten nanowire arrays were synthesized at the low temperature of 950℃.Samples were characterized by X-ray diffraction(XRD),field-emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM) and high-resolution transmission electron microscopy(HRTEM).Increasing growth time at 950℃,the tip of the WNWs changed from four(211) planes to four(110) *** controls of the orientation and structure of WNWs arrays were important for adjusting their properties to satisfy different requirements of potential nanodevices.

关键词： Tungsten nanowires Ni catalysts chemical vapor deposition Nanostructures

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茶叶样品中绿原酸含量的高效液相色谱法测定

分析测试学报 2001年第1期20卷 76-78页

作者：王丽帅琴汤志勇金泽祥中国地质大学材料科学与化学工程学院湖北武汉430074

建立了茶叶中绿原酸含量测定的反相高效液相色谱法。采用PecosphereC18 柱 ,以甲醇 -水(体积比18∶20,水中含 φ=1/61的甲酸)淋洗 ,用紫外检测器于3.6nm处测定 ,各组分的色谱峰达到基线分离。绿原酸在0.02～4.02μg范围内线性关系良好 ... 详细信息

建立了茶叶中绿原酸含量测定的反相高效液相色谱法。采用PecosphereC18 柱 ,以甲醇 -水(体积比18∶20,水中含 φ=1/61的甲酸)淋洗 ,用紫外检测器于3.6nm处测定 ,各组分的色谱峰达到基线分离。绿原酸在0.02～4.02μg范围内线性关系良好 ,线性相关系数r=0.9996。在安徽黄山产贡菊和安徽产金银花中加标的回收率分别为86.8 %、102.0% ,该法已用于十多种茶叶实际样品的测定。

关键词：茶叶绿原酸高效液相色谱法含量测定

Cement Treated Recycled Demolition Waste as a Road Base material

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Journal of wuhan university of Technology(materials {3.) 2010年第4期25卷 696-699页

作者：玄东兴 Road and Railway engineering Faculty of Civil Engineering and Geosciences Delft University of Technology 2628 CN Delft the Netherlands

To enhance the performance of mix granulate road base courses by cement treatment. The mechanical properties of cement treated mix granulate （CTMG） were studied, which was designed with 65% crushed masonry and 3.% crushed concrete by mass. The central composite design was employed to prepare specimens with different levels of cement content and degree of compaction. All specimens were cured in a fog room at 20 ℃ for a specific number of days. The compressive strength and the indirect tensile strength were determined through the monotonic compression and indirect tension tests. Effective prediction models for the mechanical properties of CTMG, in relation to the cement content, the degree of compaction and the curing time, were successfully established for a mix containing 65% crushed masonry and 3.% crushed concrete by mass.

关键词： recycled masonry crushed concrete road base cement treated mix granulates mechanical properties

Preparation of 5N high purified indium by the method of chemical purification-electrolysis

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Rare Metals 2002年第2期21卷 137-141页

作者： ZENG Dongming, ZHOU Zhihua, SHU Wangen, LIU Younian, and HU AipingCollege of Chemistry and chemical engineering, Central South university, Changsha 410083.{3. College of Chemistry and chemical engineering Central South University Changsha 410083

The application of indium requires high purity indium as material.5N high purity indium had been prepared by the method of acombination of chemically smelting and electrolysis. Smelting timewas 10 min, the abstraction rate of cadmium was 80/100-90/100 whenused solution of I_2-KI and glycerine to smelt indium. 4N metalindium was used as anode, high purity indium as cathode, In-2(SO_4)_3.H_2SO_4 system as electrolyte, and In content is 100 g/L, pH2-3.and current density 80-100 a/m^2.

关键词： high-purify indium preparation chemical purifying