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Carbon isotope composition of the Lower Triassic marine carbonates, Lower Yangtze Region, South china

Science china Earth Sciences 2006年第3期49卷 225-241页

作者： ZUO Jingxun1,2. TONG Jinnan3. QIU Haiou4.& ZHAO Laishi3.1. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 2.0008,{3. 2. Henan Institute of Geological Survey, Zhengzhou 4.0007,{3. 3. State Key Laboratory of Geological Processes and Mineral Resources at{3. University of Geosciences,{3.,{3. 4. faculty of material Sciences and {13. engineering,{3. University of Geosciences,{3.,{3. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China Henan Institute of Geological Survey Zhengzhou China State Key Laboratory of Geological Processes and Mineral Resources at china University of Geosciences Wuhan China faculty of material Sciences and {2. {3. China University of Geosciences Wuhan China

Studies on three Lower Triassic sections located on the shallow water platform, the deep water slope and in the deep water basin in the Lower Yangtze Region, South china, show the similar trend of carbon isotope evolution. Biostratigraphic correlations among the Lower Triassic sections on the basis of standard conodont zones indicate that three negative shifts occurred in the Griesbachian, the Smithian and the late Spathian stages respectively, and one distinctly positive shift occurred in the early Spathian stage. Trend of carbon isotope evolution of the Lower Triassic reflects some significant changes in the global carbon cycle. Moreover, δ 13. background values are intensively controlled by palaeogeographic environment. In general, δ 13. values from deep-water slope carbonates are lighter than those from carbonate platform and heavier than those from deep-water basin carbonates. The positive carbon isotope excursion may be induced by a significant amount of organic carbon burial in marine sediments and increase in primary productivity. The large negative carbon isotope excursions during the Early Triassic in Lower Yangtze Region are interpreted to relate to volcano eruptions based on tuffaceous claystone interlayers observed near the Permian-Triassic boundary, the Induan- Olenekian boundary and the Lower Triassic-Middle Triassic boundary.

关键词： Lower Triassic, carbon isotope compositions, palaeogeography, volcanic eruptions, Lower Yangtze Region.

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On-line parallel reversed phase two-dimensional liquid chromatography for high-throughput analysis of complex proteomic samples

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Science china Chemistry 2006年第6期49卷 527-533页

作者： WANG Zhicong1,3. ZHANG Qinghe2. LI Tong2. ZHAO Zhongyi3.& ZHANG Weibing1 1. Dalian Institute of chemical Physics, Chinese Academy of Sciences, Dalian 116011,{3. 2. Dalian Elite Analytical Instrument Co., Ltd., Dalian 116011,{3. 3. {3. of {4. Science and chemical engineering,{3. University of Geosciences, wuhan 43.074,{3. Dalian Institute of chemical Physics Chinese Academy of Sciences Dalian China faculty of material Science and {2. {3. China University of Geosciences Wuhan China Dalian Elite Analytical Instrument Co. Ltd. Dalian China

A comprehensive two-dimensional liquid chromatographic system (2. SCX/RP) is con- structed with a 10-port-2.way valve using strong cation exchange chromatography (Hypersil SCX, 100 mm×4.6 mm I.D.) followed by reversed phase chromatography (Hypersil BDS C18, 15 mm×4.6 mm I.D.) to separate the complex peptides from globin peptic hydrolysate. After the sample was loaded on the SCX column, the phosphate buffer (pH 4.0) was used to elute the peptides. Then, elutes flowed through the interface and the peptides focused on the head of the trapping columns (Hypersil BDS C18, 15 mm×4.6 mm I.D.) but salt passed into the waste. After the valve was switched, the samples were flushed with a backward flow into the RP analytical column. The peptides on the SCX were eluted with 12.discontinuous steps linearly increasing salt concentrations. The peptides enriched on the trapping column were desalted and separated by the RP columns. The resolution and the resolved peaks of the 2. SCX/RP system were greatly increased and the total peak capacity reached as high as 2.80.

关键词： two-dimensional liquid chromatography, interface, trapping column, proteomics, globin.

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Synthesis and photochromic properties of WO_3.powder induced by oxalic acid

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Science china Chemistry 2009年第5期52卷 609-614页

作者： SHEN Yi1, ZHU Hua1, HUANG Rong1, ZHAO Li2.& YAN ShaNing1 1 faculty of material Science and {2. {3.,{4. University of Geosciences, wuhan 43.074,{4. 2.faculty of materials Science and {3., Hubei University, wuhan 4.0062.{4. faculty of material Science and {2. {3. China University of Geosciences Wuhan China faculty of materials Science and {2. Hubei University Wuhan China

Tungsten trioxide powder with the novel morphology was prepared via the hydrothermal method with oxalic acid as the organic inducer, the structure and shape of which were detected by X-ray diffraction (XRD), scanning electron microscopy (SEM) and BET. Furthermore, photochromic properties of the as-prepared powder samples were tested by an ultraviolet-visible spectrophotometer combined with a color difference meter. The corresponding results indicated that the induced product was still hexagonal WO3. made up of regularly spindle particles with 2.0-3.0 nm in length and 3.-50 nm in width. The ratio of the length and width was from 4.to 10. Moreover, the special morphology improved its absorptive capacity to the excitation light source, resulting in its high photochromic properties.

关键词： WO3 powder photochromism oxalic acid organic inducer

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Surface roughness and removal rate in magnetorheological finishing of a subsurface damage free surface

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Progress in Natural Science:materials International 2005年第6期15卷 538-544页

作者： CHENG Haobo1*, WANG Yingwei2. FENG Zhijing1 and CHENG Kai3.1. State Key Laboratory of Tribiology, Tsinghua University, Beijing 100084. china 2. Department of {2. Sciences, Changchun University of Science and Technology, Changchun 13.02., china 3. {3. of Information and {4. Systems, City Campus, Leeds LS1 3.E, UK) State Key Laboratory of Tribiology Tsinghua University Beijing 100084 China Department of material Sciences Changchun University of Science and Technology Changchun 130021 China faculty of Information and engineering Systems City Campus Leeds LS1 3HE United Kingdom

Based on computer-controlled optical surfacing, a new technique called magnetorheological finishing (MRF), is presented. The new technique combines the features of conventional loose abrasive machining with a wheel shaped polishing tool. The tool incorporates a host of features and has unprecedented fabricating versatility. The pre-polishing and fine polishing processes can be performed only by adjusting different parameters. The material removal function is studied theoretically and the results of simulation present a Gaussian distribution feature. Based on the established theoretical model, material removal rate experiments involving a parabolic mirror are designed and carried out to determine the effect of controllable parameters on size of the gap between the workpiece and the polishing wheel, rotating speed of the polishing wheel, concentration of volume fraction of non-magnetic particles and polishing time. Further experiments are carried out on the surface microstructure of the workpiece, the final surface roughness with an initial value of 10.98 nm reaches 1.2. nm root mean square (RMS) after 2. min of polishing. The subsurface damage experiment and the atomic force microscopy (AFM) measurement on the polished surface can also verify the feasibility of the MRF technique.

关键词： magnetorheological finishing surface roughness computer controlled optical surfacing subsurface damage removal function.

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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 {2., Zhengzhou University, Zhengzhou 4.0052. china 2. Department of Physics, Beijing Normal University, Beijing 100875, china 3. Institute of Cultural Relic and Archaeology of Henan Province, Zhengzhou 4.0000, china 4. Institute of Modern Physics, Fudan University, Shanghai 2.04.3. china 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

3.0}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 {2. elements. The data of seven major {2. 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.

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One-pot synthesis of crystalline SnO_2.nanoparticles and their low-temperature ethanol sensing characteristics

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Science china(Physics,Mechanics & Astronomy) 2009年第10期52卷 1601-1605页

作者： CHEN YuJin1,2.3.ZHU ChunLing4.WANG LiJiao3.& WANG TaiHong2.1 School of {3.s Science and {2.,Beijing Institute of Technology,Beijing 100081,china 2.Micro-Nano Technologies Research Center,Hunan University,Changsha 4.0082.china 3.College of Science,Harbin {2. University,Harbin 150001,china 4.College of {3. Science and chemical {2.,Harbin {2. University,Harbin 150001,china School of materials Science and engineering Beijing Institute of Technology Beijing China Micro-Nano Technologies Research Center Hunan University Changsha China College of Science Harbin Engineering University Harbin China College of material Science and chemical {2. Harbin Engineering University Harbin China

Crystalline SnO2.nanoparticles(NPs) with a diameter less than 6 nm are synthesized using potassium stannate trihydrate as the precursor in a basic *** synthesized NPs can detect ethanol at a ppm level even at 100℃.Furthermore,the NPs have good selectivity to *** excellent ethanol sensing performances are attributed to the small size effect according to the space-charge model.

关键词： SnO2 nanoparticles sensing characteristics

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Effect of TiO_2.on the Formation of Clinker with High C_3.

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Journal of wuhan University of Technology(materials Science) 2009年第5期24卷 830-833页

作者：马先伟陈胡星 Cement-based material Institute Tongji University Henan University of Urban Construction College of material Science and chemical {2. Zhejiang University

Effect of TiO2.content on the burnability of clinker with high C3. were investigated by determination of free lime in final product, and the clinker phase formation, microstructural features of C3. and the solubility of TiO2.in C3. were further studied by XRD, SEM/EDS analysis. TiO2.accelerates the combination of free lime in the samples, free lime content decreases obviously with TiO2.increasing up to 2. and almost remains above 2.. A new phase CaO·TiO2.was found when TiO2.was up to 3., and samples with TiO2.displayed well-formed uniform size hexagonal C3. crystal. The limit of solubility of TiO2.in C3. at 14.0 ℃ is about 1.7%.

关键词： TiO2 C3. formation

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Synthesis and magnetic properties of CdS/α-Fe_2._3.hierarchical nanostructures

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Science china(Physics,Mechanics & Astronomy) 2009年第7期52卷 997-1002页

作者： CHEN YuJin1,2.3. SHI XiaoLing1, CAO MaoSheng1 & ZHU ChunLing4.1 School of materials Science and {2., Beijing Institute of Technology, Beijing 100081, china 2.Micro-Nano Technologies Research Center, Hunan University, Changsha 4.0082. china 3.College of Science, Harbin {2. University, Harbin 150001, china 4.College of material Science and {13. {2., Harbin {2. University, Harbin 150001, china School of materials Science and engineering Beijing Institute of Technology Beijing China Micro-Nano Technologies Research Center Hunan University Changsha China College of Science Harbin Engineering University Harbin China College of material Science and chemical {2. Harbin Engineering University Harbin China

CdS/α-Fe2.3.hierarchical nanostructures, where the CdS nanorods grow irregularly on the side surface of α-Fe2.3.nanorods, were synthesized via a three-step process. The diameters and lengths of CdS nanorods can be tuned by changing the ethylenediamine (EDA) and Cd ion concentrations. The magnetic investigations by superconducting quantum interference device indicate that the hierarchical nanostructures have an Morin transition at lower temperature (2.0 K) than that of the single bulk α-Fe2.3.materials (2.3.K). Importantly, the hierarchical nanostructures exhibit weakly ferromagnetic characteristics at 3.0 K. A sharp peak assigned to the surface trap induced emission are observed in room temperature PL spectra. Combining with the optoelectronic properties of CdS, the CdS/ α-Fe2.3.hierarchical nanostructures may be used as multi-functional materials for optoelectronic and magnetic devices.

关键词： α-Fe2.3 CdS hierarchical nanostructures magnetic properties

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Theoretical analysis of alloy multiplying factor by the empirical electron theory of solids and molecules

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Science china(Technological Sciences) 2007年第6期50卷 807-814页

作者： SONG YuePeng1,2. LIU GuoQuan2. LI ZhiLin3. FENG ChengMing1 1 Mechanical and Electronic engineering College, Shandong Agricultural University, Tai’an 2.1018, china 2.College of {2.s Science and engineering, University of Science and Technology, Beijing 100083. china 3.College of {2. Science and engineering, Beijing University of chemical Technology, Beijing 10002., china Mechanical and Electronic engineering College Shandong Agricultural University Tai’an China College of materials Science and engineering University of Science and Technology Beijing China College of material Science and engineering Beijing University of Chemical Technology Beijing China

By introducing the distribution probability of structural units in austenite contain- ing alloying elements and considering its effects on phase transformation, this paper establishes a calculation model of distribution probability of structural units. A new valence electron structure (VES) parameter-transformation effect coefficient of alloying elements (HL), is defined and then studied both theoretically and ex- perimentally. The relationship between the parameter HL and the multiplying factor (the quenching capability factor) of alloying elements is studied. The results indi- cate that the two parameters (HL and the quenching capability factor) have the same variation characteristic and substance feature. Therefore, the multiplying factor virtually expresses the relative quantity of structural units in the alloying elements-containing austenite.

关键词： multiplying factor (the quenching capability factor), empirical electron theory of solids and molecules, transformation effect coefficient of alloying elements, structural units in austenite containing alloying elements

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Effect of Ultrafine Grinding on Dissolving-out Quantity of Tanshinone IIA from Radix Salvia Miltiorrhiza

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Journal of wuhan University of Technology(materials Science) 2009年第6期24卷 973-976页

作者：苏艳丽傅正 College of Chemistry Chemical Engineering and Material ScienceSoochow UniversitySuzhou China State Key Laboratory of Advanced Technology for material Synthesis and Processing Wuhan University of Technology

In order to improve the bioavailability, Radix salvia miltiorrhiza raw powder mixed with distilled water （5.5wt%） was ultrafinely ground to nanosize particles using HSCS pulverizer, and the dissolving-out quantity of tanshinone IIA in the filtrate that obtained from nanoparticles suspension and raw powder marinated in water for different time was determined by HPLC. The experimental results show that raw powder can be ultrafinely ground to 13..5 nm at 1500 r/min for 50 min and the molecular structure of active ingredients doesnot change, and the dissolving-out quantity of tanshinone IIA obtained from the filtrate is increased greatly from 12.77 μg/g to 54.55 μg/g.

关键词： Radix salvia miltiorrhiza tanshinoe IIA HPLC dissolving-out quantity

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