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^(137)Cs Redistribution in Thin Stony Soil of a Carbonate Rock Slope in Southwest china

Pedosphere 2011年第1期21卷 37-45页

作者： LI Hao ZHANG Xin-Bao wang Kc-Lin WEN An-Bang institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 (China) Graduate University Chinese Academy of Sciences Beijing 100049 (China) State key laboratory of Environmental {2. Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 (China) institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 (China)

The fallout radionuclide cesium-137(137 Cs) has been widely employed as a tracer for assessment of soil loss from thick uniform soils;however,few studies have been conducted on thin stony soils on slopes underlain by carbonate rocks which are widely distributed in karst *** derived from 137 Cs measurement of soil samples collected along a carbonate rock slope with thin stony soil where neither soil erosion nor deposition occurred was used to investigate the characteristics of 137 Cs redistribution in a karst area of Southwest *** results indicated that the 137 Cs inventories of the surface soil on the slope studied were much lower than that of the local 137 Cs reference inventory and the 137 Cs activities were much higher than those on slopes with thick uniform *** spatial distribution of 137 Cs inventories was characterized by considerable *** high 137 Cs depletion in the stony soil of the slope studied was mainly because a considerable proportion of the fallout input of 137 Cs could be lost with runoff and the dissolution of carbonate particles in the soil promoted the loss of 137 *** demonstrated that the rates of soil loss could not be estimated from the degree of depletion of the 137 Cs inventory relative to the local reference inventory for the thin stony soil of the rocky slope underlain by carbonate rocks in the study area in the way that has been widely used in areas with thick uniform soils.

关键词： carbonate dissolution, ^137Cs fallout, ^137Cs inventory karst area runoff

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Detection of Tumor Marker CA12. in Ovarian Carcinoma Using Quantum Dots

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Acta Biochimica et Biophysica Sinica 2004年第10期36卷 681-686页

作者： Hui-Zhi wang, Hai-Yan wang, Ru-Qiang LIANG, and Kang-Cheng RUAN* {2. laboratory of Proteomics, institute of Biochemistry and Cell Biology, Shanghai institutes for Biological sciences,chinese academy of sciences, Graduate School of the chinese academy of sciences, Shanghai 2.0031, china key laboratory of Proteomics Institute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesChinese Academy of SciencesGraduate School of the Chinese Academy of SciencesShanghai 200031China

Semiconductor quantum dots (QDs) offer several advantages over organic dyes in fluores- cence-imaging applications, such as higher quantum yield, exceptional photostability, and a narrow, tunable, and symmetric emission spectrum. To explore whether QDs could specifically and effectively label tumor markers and be used in immunohistochemistry as a novel type of fluorescent probe, we used quantum dots with maximum emission wavelength 605 nm (QD605) to detect the ovarian carcinoma marker CA12. in specimens of different types (fixed cells, tissue sections, and xenograft piece). Additionally, we compared the photostability of QD signals with that of a conventional organic dye, FITC. All labeling signals of QDs were found to be more specific and brighter than those of FITC. Moreover, the QDs exhibited exceptional photostability during continuous illumination for 1 h by a high-intensity laser (Ar laser power 100 mW) at 488 nm, while the FITC signals faded very quickly and became undetectable after 2. min of illumination. These results indicate that QD-based probes can offer substantial advantages over existing fluorophores in many applications, and can be used effectively in immunohistochemistry as a novel class of fluorescent probes.

关键词： quantum dots detection of tumor marker CA12. ovarian carcinoma

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Oxygen Permeation Behaviors and Hardening Effect of Titanium Alloys at High Temperature

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Journal of Materials Science & Technology 2004年第6期20卷 719-723页

作者： Hongyan MA, Maocai wang and Weitao WUState key {2. for Corrosion and Protection, institute of Metai Research, chinese academy of sciences, Shenyang 110016, chinaGraduate School of the chinese academy of sciences, Beijing 100039, china Lab. for Corrosion and Protection Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China Graduate Sch. Chinese Acad. of Sci. Beijing 100039 China

In order to improve the surface hardness and wear resistance of Ti and Ti alloy components, an oxygen permeation treatment (OPT) was developed. The oxygen permeation behaviors of three Ti alloys, TA2. TB5 and TC11, treated in air with O-P medium at high temperature have been studied. The results show that the 0-P treatment can significantly improve the surface hardness of Ti alloys. The oxidation mass-gain of β-Ti alloy (TB5) is much higher than α-Ti alloy (TA2. under the same condition, while α+β Ti alloy (TC11) is the lowest. All the Ti alloys treated at this condition produce two surface layers: the outer layer consists mainly of TiO2. as well as trace of other oxides, and the inner layer consists of a Ti-O interstitial solid solution formed by the diffusion of oxygen in α crystal lattice. Thick scales of β Ti alloy (TB5) are easily formed depending mainly on the poor solid solution content of oxygen, while deep solution layer can be formed since partial β phase has been transformed into α phase. The scales of α-β Ti alloy (TC11) are very thin and compact. Aluminum-rich zone, as well as deficient zone, is found in oxide layers. A crystallographic characterization of oxygen solution layer has been performed and evaluated by crystallographic lattice constant.

关键词： Microstructure Oxygen permeation Titanium Solid solution

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Research progress on Drosophila visual cognition in china

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Science china(Life sciences) 2010年第3期53卷 374-384页

作者： GUO AiKe1,2.ZHANG Ke1,PENG YueQin1 & XI wang1 1 institute of Neuroscience,State {2. laboratory of Neuroscience,Shanghai institutes for Biological sciences,chinese academy of sciences,Shanghai 2.0031,china 2.State {2. laboratory of Brain and Cognitive Science,institute of Biophysics,chinese academy of sciences,Beijing 100101,china 1. institute of Neuroscience State Key Laboratory of Neuroscience Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China2. State Key Laboratory of Brain and Cognitive Science Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

Visual cognition,as one of the fundamental aspects of cognitive neuroscience,is generally associated with high-order brain functions in animals and ***,as a model organism,shares certain features of visual cognition in common with mammals at the genetic,molecular,cellular,and even higher behavioral *** learning and memory to decision making,Drosophila covers a broad spectrum of higher cognitive behaviors beyond what we had *** with powerful tools of genetic manipulation in Drosophila,an increasing number of studies have been conducted in order to elucidate the neural circuit mechanisms underlying these cognitive behaviors from a genes-brain-behavior *** goal of this review is to integrate the most important studies on visual cognition in Drosophila carried out in china's Mainland during the last decade into a body of knowledge encompassing both the basic neural operations and circuitry of higher brain function in ***,we consider a series of the higher cognitive behaviors beyond learning and memory,such as visual pattern recognition,feature and context generalization,different feature memory traces,salience-based decision,attention-like behavior,and cross-modal leaning and *** discuss the possible general gain-gating mechanism implementing by dopamine-mushroom body circuit in fly's visual *** hope that our brief review on this aspect will inspire further study on visual cognition in flies,or even beyond.

关键词： Visual invariance recognition visual memory traces feature and context generalization selective attention cross-modality memory integration salience-based decision making

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Novel gaseous transient species:generation and characterization

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Science china Chemistry 2007年第2期50卷 145-169页

作者： ZENG XiaoQing1,2.& wang DianXun11 State key {2. for Structural Chemistry of Unstable and Stable Species,institute of Chemistry,chinese academy of Sci-ences,Beijing 100080,china 2.Graduate School of chinese academy of sciences,Beijing 100039,china 1. State key laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China 2. Graduate School of chinese academy of {2. Beijing 100039 China

Due to special properties of transient species, such as short-lived, unstable, reactive, and even explosive, the generation and subsequent characterization is a great challenge for experimental chemists. In our laboratory, systematic researches have been carried out to investigate novel transient species: reactive halogen species (RHS), short-lived free radicals, and metastable pseudohalogen compounds, based on the successive technical improvements on the Hel Photoelectron spectroscopy (PES). In this review, the topic mainly focuses on innovative methods of generating novel transient species, and subsequent geometric and electronic structure characterizations of these species combined with quantum chemical calculations.

关键词： reactive halogen species radicals pseudohalogen compounds Hel Photoelectron Spectroscopy (PES) quantum chemical calculations

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Numerical study on short-circuit current of single layer organic solar cells with Schottkey contacts

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Science china(Technological sciences) 2010年第4期53卷 1023-1027页

作者： MA ChaoZhu1,MENG WeiMin2.PENG YingQuan1,2.wang RunSheng1,LI RongHua1,XIE HongWei1,wang Ying1 & YE ZaoChen1 1 {2. of Microelectronics of School of Physical Science and Technology,lanzhou University,lanzhou 73.000,china 2.key laboratory for Magnetism and Magnetic Materials of the Ministry of Education,lanzhou University,lanzhou 73.000,china 1. institute of Microelectronics of School of Physical Science and Technology Lanzhou University Lanzhou 730000 China2. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University Lanzhou 730000 China

The influence of the cathode work function,carriers mobilities and temperature on the short-circuit current of single layer organic solar cells with Schottkey contacts was numerically studied,and the quantitative dependences of the short-circuit current on these quantities were *** results provide the theoretical foundation for experimental study of single layer organic solar cells with Schottkey contacts.

关键词： cathode work function carrier mobility temperature short-circuit current

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Discovery of seep carbonate nodules as new evidence for gas venting on the northern continental slope of South china Sea

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chinese Science Bulletin 2006年第10期51卷 1228-1237页

作者： CHEN Zhong1,2.3, YAN Wen1,2.3, CHEN Muhong1,3, wang Shuhong1,2.3, LU Jun1,3, ZHANG Fan1,3, XIANG Rong1,3, XIAO Shangbin1,3, YAN Pin1,2.3 & GU Senchang1,2.3 1. South china Sea {2. of Oceanology, chinese academy of Sci-ences, Guangzhou 510301, china 2. Guangzhou Center for Gas Hydrate Research, chinese academy of sciences, Guangzhou 510301, china 3. key laboratory of Marginal Sea {12., South china Sea {2. of Oceanology and Guangzhou {2. of geochemistry, chinese academy of sciences, Guangzhou 510301, china South china Sea institute of Oceanology Chinese Academy of Science Guangzhou China Guangzhou Center for Gas Hydrate Research Chinese Academy of Sciences Guanzhou China key laboratory of Marginal Sea {2. South China Sea Institute of Oceanology and Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China

Seep carbonate nodules were firstlycollected from the southwestern Dongsha area onnorthern continental slope of South china Sea formineralogical and geochemical studies. The resultsof X-ray diffraction show that carbonate nodules arecomposed of Fe-rich domolite,siderite and a few cal-cite and aragonite, as well as a small quantity ofnon-carbonate minerals such as goethite, quartz andclay minerals. Fe-rich dolomite and siderite charac-terized by euhedral microcrystalline structure weredirectly precipitated at cold seeps. The δ 13C valuesfor Fe-rich dolomite and siderite in the bulk nodulesvary from ?18.2.‰ to ?36.07‰, and the δ 18O valuesrange from 0.42.to 2.76‰. Their moderate depleted13C reflects that carbon origin is possibly thermoge- netic gas or mixed gas, which is evidence of gasventings in the seafloor. Moreover, massive wormtube fossils related to cold seeps were found on thesurfaces of carbonate nodules, and the conduitsand/or channels in semi-solidified nodules whichwere not filled by carbonate or sediment were alsoobserved. A preliminary conclusion is that activemicro gas venting with a conduit/channel diameterrange from 2.0 μm to 600 μm possibly exists inmodern seafloor of the carbonate nodule area.

关键词：渗出碳酸盐节碳氧同位素甲烷渗漏天然气水化物

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Effect of Sputtered TiAlCr Coatings on Oxidation and Hot Corrosion Resistance of Ti-2.Al-14Nb-3V

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Journal of Materials Science & Technology 2001年第5期17卷 501-506页

作者： Fuhui wang, Chunhong GUAN, Zhaolin TANG and Weitao WU State key {2. for Corrosion and Protection, institute of Metal Research, The chinese academy of sciences, Shenyang 110016, china chinese Acad Sci Met Res Inst State Key Lab Corros & Protect Shenyang 110016 Peoples R China

The effect of sputtered Ti-50Al-10Cr and Ti-50A1-2.Cr coatings on both isothermal and cyclic oxidation resistance at 800-900℃ and hot corrosion resistance at 850℃ of Ti-2.Al-14Nb-3V was investigated. Results indicated that Ti-2.Al-14Nb-3V alloys exhibited poor oxidation resistance due to the formation of Al2.3+TiO2.AlNbO4 mixed scales in air at 800-900℃ and poor hot corrosion resistance due to the spoliation of scales formed in Na2.O4+K2.O4 melts at 850℃. Both Ti-50Al-10Cr and Ti-50Al-2.Cr coatings remarkably improved the oxidation and hot corrosion resistance of Ti-2.Al-14Nb-3V alloy.

关键词： Ti Cr Effect of Sputtered TiAlCr Coatings on Oxidation and Hot Corrosion Resistance of Ti-2.Al-14Nb-3V Al

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Narrow line Seyfert 1 galaxies: where are the broad line regions?

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Science china(Physics,Mechanics & Astronomy) 2010年第12期53卷 2307-2311,2339-2343页

作者： MAO WeiMing 1,2.3 , HU Chen 2., wang JianMin 2., BIAN WeiHao 4 , ZHANG Shu 2.& ZHAO Gang 1 1 key {2. of Optical Astronomy, National Astronomical Observatories, chinese academy of sciences, Beijing 100012. china 2.key {2. for Particle Astrophysics, institute of High Energy Physics, chinese academy of sciences, Beijing 100049, china 3 Graduate University of the chinese academy of sciences, Beijing 100049, china 4 Department of Physics, Nanjing Normal University, Nanjing 2.0011, china 1. key laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China2. Key Laboratory for Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China3. Graduate University of the Chinese Academy of Sciences Beijing 100049 China4. Department of Physics Nanjing Normal University Nanjing 210011 China

A sample consisting of 2.1 narrow line Seyfert 1 galaxies (NLS1s) with high quality spectra from the Sloan Digital Sky Survey (SDSS) is selected to explore where broad line regions are in these objects. We find that the Hβ profile can be fitted well by three (narrow, intermediate and broad) Gaussian components, and the FWHM ratios of the broad to the intermediate components hold a constant of 3.0 roughly for the entire sample. If the broad components originate from the region scaled by the well-determined Hβ reverberation mapping relation, we find that the intermediate components originate from the inner edge of the torus, which is scaled by dust K-band reverberation. We find that the IC and the BC are strongly linked dynamically, but the relation of their covering factors is much more relaxed, implying that both regions are clumpy.

关键词： black hole physics galaxies: evolution quasars: general

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Research on the dynamics of the South china Sea opening:Evidence from analogue modeling

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Science china Earth sciences 2006年第10期49卷 1053-1069页

作者： SUN Zhen1,2, ZHOU Di1, ZHONG Zhihong3, XIA Bin2, QIU Xuelin1, ZENG Zuoxun4 & JIANG Jianqun5 1. CAS key laboratory of Marginal Sea geology, South china Sea institute of Oceanology, chinese academy of sciences, Guangzhou 510301, china 2. CAS key laboratory of Marginal Sea geology, Guangzhou institute of geochemistry, chinese academy of sciences, Guangzhou 510640, china 3. Department of Technology, Shenzhen Branch of CNOOC, Guangzhou 510240, china 4. Faculty of Earth sciences, china University of Geosciences, Wuhan 430074, china 5. Hainan Oil & Gas Exploration Company, Liaohe Oilfield Petrochina, Panjin 124010, china 1. CAS key laboratory of Marginal Sea {2. South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 2. CAS key laboratory of Marginal Sea {2. Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China 3. Department of Technology Shenzhen Branch of CNOOC Guangzhou 510240 China 4. Faculty of Earth sciences China University of Geosciences Wuhan 430074 China 5. Hainan Oil & Gas Exploration Company Liaohe Oilfield PetroChina Panjin 124010 China

Independent of Indochina extrusion, the South china Sea experienced a process from passive continental rifting to marginal sea drifting. According to the fault patterns in the Beibu Gulf basin and the Pearl River Mouth basin, the continental rifting and early spreading stage from 32.to 2. Ma were controlled by extensional stress field, which shifted clockwise from southeastward to south southeastward. From 2. Ma on, the sea spread in NW-SE direction and ceased spreading at around 15.5 Ma. Integrated geological information with the assumption that the South china Sea developed along a pre-Cenozoic weakness zone, we did analogue experiments on the South china Sea evolu- tion. Experiments revealed that the pre-existing weakness zone goes roughly along the uplift zone between the present Zhu-1 and Zhu-2.depression. The pre-existing weakness zone is composed of three segments trending NNE, roughly EW and NEE, respectively. The early opening of the South china Sea is accompanied with roughly 15° clockwise rotation, while the SE sub-sea basin opened with SE extension. Tinjar fault was the western boundary of the Nansha block (Dangerous Ground), while Lupar fault was the eastern boundary of the Indochina, NW-trending rift belt known as Zengmu basin developed between above two faults due to block divergent of Indochina from Nansha. In the experiment, transtensional flower structures along NW-trending faults are seen, and slight inversion occurs along some NE-dipping faults. The existence of rigid massifs changed the orientations of some faults and rift belt, and also led to deformation concentrate around the massifs. The rifting and drifting of the South china Sea might be caused by slab pull from the proto South china Sea subducting toward Borneo and/or mantle flow caused by India-Asia collision.

关键词： South china Sea, rifting and drifting, clockwise rotation, analogue modeling, rigid massifs.

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