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DISCOVERY　OF　CAMBRIAN－ORDOVICIAN　COCCOLITH　FOSSILS　AND　THEIR　OIL－GENERATING　SIGNIFICANCE　IN　TADONG　WELL　Ⅰ　AND　YINGMAI　WELL　Ⅰ　OF　THE　TALIMU　BASIN

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Scientia Geologica Sinica 1996年第3期 395-407页

作者： Hou Kui(institute of Geology, chinese academy of sciences, beijing 100029)Gu Jiayn(institute of Petroleum Exploration and Exploitation)Fan Jiasong and Wang Yaoinstitute of Geology, chinese academy of Soiences, beijing 100029)Chen Yancheng(Geological insti

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染色质动态调整与基因转录

生物工程进展 1999年第4期19卷 23-27,10页

作者： Shen Yufei (National Laboratory of Medical Molecular Biology,institute of Basic Medical sciences chinese academy of Medical sciences & Peking Union Medical sciences beijing 100005,china) 中国医学科学院中国协和医科大学

核小体是真核细胞染色质的基本单位。真核基因组ＤＮＡ在细胞核中储存在染色质结构中。核小体的核心结构是由１４６个碱基对的ＤＮＡ盘绕四对核心组蛋白的八聚体外面近两周所构成。核小体核心组蛋白Ｈ３／Ｈ４两对异源二聚体是核小体亚... 详细信息

核小体是真核细胞染色质的基本单位。真核基因组ＤＮＡ在细胞核中储存在染色质结构中。核小体的核心结构是由１４６个碱基对的ＤＮＡ盘绕四对核心组蛋白的八聚体外面近两周所构成。核小体核心组蛋白Ｈ３／Ｈ４两对异源二聚体是核小体亚颗粒的核心，它能稳定地与ＤＮＡ结合...

关键词：染色质核小体动态调整基因转录

Cortactin mediated morphogenic cell movements during zebrafish (Danio rerio) gastrulation

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Science china(Life sciences) 2005年第6期48卷 601-607页

作者： YU Dan1,2, ZHANG Peijun1 & ZHAN Xi3 1. Experimental Marine Biology Lab, institute of Oceanology, chinese academy of sciences, Qingdao 266071, china 2. Graduate School of the chinese academy of sciences, beijing 100039, china 3. Greenebaum Cancer Center, Department of Cancer Center, University of Maryland School of Medicine, MD 20855, USA 1. Experimental Marine Biology Lab Institute of Oceanology Chinese Academy of Sciences 266071 Qingdao China 2. Graduate School of the chinese academy of sciences 100039 Beijing China 3. Greenebaum Cancer Center Department of Cancer Center University of Maryland School of Medicine 20855 MD USA

Cell migration is essential to direct embryonic cells to specific sites at which their developmental fates are ultimately determined. However, the mechanism by which cell motility is regulated in embryonic development is largely unknown. Cortactin, a filamentous actin binding protein, is an activator of Arp2/3 complex in the nucleation of actin cytoskeleton at the cell leading edge and acts directly on the machinery of cell motility. To determine whether cortactin and Arp2/3 mediated actin assembly plays a role in the morphogenic cell movements during the early development of zebrafish, we initiated a study of cortactin expression in zebrafish embryos at gastrulating stages when massive cell migrations occur. Western blot analysis using a cortactin specific monoclonal antibody demonstrated that cortactin protein is abundantly present in em-bryos at the most early developmental stages. Immunostaining of whole-mounted embryo showed that cortactin immunoreactivity was associated with the embryonic shield, predominantly at the dorsal side of the embryos during gastrulation. In addition, cortactin was detected in the convergent cells of the epiblast and hypoblast, and later in the central nervous system. Im-munofluorescent staining with cortactin and Arp3 antibodies also revealed that cortactin and Arp2/3 complex colocalized at the periphery and many patches associated with the cell-to-cell junction in motile embryonic cells. Therefore, our data suggest that cortactin and Arp2/3 medi-ated actin polymerization is implicated in the cell movement during gastrulation and perhaps the development of the central neural system as well.

关键词： cortactin, Arp2/3 complex, zebrafish, cell movements, morphogenesis, gastrulation, neurulation.

Synthesis of TiO2 nanotubes film and its light scattering property

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Science Bulletin 2005年第18期 19-24页

作者： MA Yutao1,2, LIN Yuan1, XIAO Xurui1, LI Xueping1 & ZHOU Xiaowen1 1. Key Laboratory of Photochemistry, Center for Molecular Science, institute of Chemistry, chinese academy of sciences, beijing 100080, china 2. Graduate School of chinese academy of sciences, beijing 100039, china

TiO2 nanotubes with diameters of 10 nm and lengths up to 600 nm were fabricated by directly using com-mercial TiO2 powders P25 as the precursors via sonica-tion-hydrothermal combination approach. TiO2 nanotubes were characterized by means of X-ray powder diffractometer (XRD), scanning electron microscope (SEM), selected area electron diffraction pattern (SAED) and transmission elec-tron microscope (TEM). The light scattering property of film electrodes modified with TiO2 nanotubes was studied and revealed that TiO2 nanotubes can be used as the light scat-tering centers to increase the light absorption in dye- sensi-tized solar cells. The TiO2 nanotubes film electrodes mixed with 10% small nanoparticles TiO2 had both strong light scattering property and fine mechanical characteristics, and this kind of electrodes can be used as electrodes in improving the conversion efficiencies of dye-sensitized solar cells.

关键词： TiO2 nanotubes dye-sensitized solar cells light scattering property transmittance spectra reflectance spectra.

Function and interaction of maturation-promoting factor and mitogen-activated protein kinase during meiotic maturation and fertilization of oocyte

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Progress in Natural Science:Materials International 2004年第7期 10-15页

作者： HUO Lijun, FAN Hengyu, CHEN Dayuan and SUN Qingyuan*(State Key Laboratory of Reproductive Biology, institute of Zoology, chinese academy of sciences, beijing 100080, china) State Key Laboratory of Reproductive Biology Institute of Zoology Chinese Academy of Sciences Beijing 100080 China

Mitogen-activated protein kinase (MAP kinase) cascade and maturation-promoting factor (MPF) play very important roles during meiotic maturation and fertilization of oocyte. Interaction between MAP kinase and MPF influences meiotic maturation and fertilization of oocyte throughout the animal kingdom, including stimulation of germinal vesicle breakdown (GVBD), suppression of DNA replication, control of meiotic chromosome segregation, maintenance of metaphase II arrest, and resumption and completion of second meiosis. This review focuses on the function and interaction of MAP kinase and MPF during meiotic maturation and fertilization of oocyte.

关键词： oocyte meiosis fertilization MAP kinase MPF.

EFFECT OF TH ETHICKNESS OF SPECIMENS ON THERMAL RESIDUAL STRESSES IN SiCw/Al COMPOSITES

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 427-432页

作者： Q. Y. Liu1 ,2) W. D. Fei2) and N. G. Liang1) 1) LNM,institute of Mechanics,The chinese academy of sciences,beijing 100080 ,china 2) Schoolof Materials Science and Engineering , Harbin institute of Technology , Harbin 150001 ,china

heinteracteach other among three kindsofthermalresidualstresses were analyzed firstly. Theresultsshown thatthe presenceof microstressandthermal mismatch stresshad noinflu enceon the measurement of macrostress, but macrostress can affect the measured value of thermal mismatch stress. Theeffectofthicknessofspecimen on thermalresidualstresses was discussed. Macrostresscan be neglected in thin specimen, thermal mismatch stressincreased with quenchingtemperatureincreasing, andobtainedtheir maximum valuesat400 ℃,then decreased . Forthethickspecimen, thecompressive macrostressatthesurfaceincreased with the quenching temperature increasing. The changing tendency of thermal mismatch stresswith quenchingtemperature wasquite differentcompared withthethinspecimens, which ob tainedtheir minimum valueat400℃.

关键词： thermalresidualstresses X ray diffraction SiCw/ Alcomposites

THERMODYNAMIC PROPERTIES OF Al-Ce-Pb(or Sn) LIQUID SOLUTIONS

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中国有色金属学会会刊：英文版 1993年第3期3卷 27-28,51页

作者： Sun, Yunyong Du, Ting Central Iron and Steel Research institute, beijing 100081, china

Thermodynamic properties of Al-Ce-Pb and Al-Ce-Sn liquid systems were studied by direct equilibrium method at 800℃. The results obtained include: equilibrium products, their standard Gibbs energies of formation, equi... 详细信息

关键词： aluminum-base solutions cerium lead tin thermodynamic properties

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4～7岁儿童绘画摹写的语义编码特点

心理学报 2003年第1期35卷 76-83页

作者：李甦李文馥王丽中国科学院心理研究所北京100101 北京师范大学教育系北京100875

以二维模型为主对儿童绘画编码特点及发展进程的探讨。研究对象为 4～ 7岁儿童 ,按年龄分为 4组 ,共16 3人。主要实验有二 :一是选择同一实物的三维和二维两类模型让被试摹写 ;二是选择语义熟悉程度和语义多寡不同的二维模型让被试摹写... 详细信息

以二维模型为主对儿童绘画编码特点及发展进程的探讨。研究对象为 4～ 7岁儿童 ,按年龄分为 4组 ,共16 3人。主要实验有二 :一是选择同一实物的三维和二维两类模型让被试摹写 ;二是选择语义熟悉程度和语义多寡不同的二维模型让被试摹写。个别实验 ,实验顺序随机安排。研究结果表明 :儿童对维度不同的模型绘画编码具有共同的特点 ,表现出三种编码形式 :其一 ,将模型的各构件分离 ,各自独立编码 ;其二 ,依模型的典型特征编码 ;其三 ,按各模型真实形象编码。儿童对不同维度模型绘画编码发展的进程不同。对二维模型绘画编码水平和发展速度比三维模型提早 1年。模型语义的多寡及熟悉程度影响儿童二维模型绘画编码。

关键词：儿童绘画语义编码特点摹写模型二维模型三维模型儿童画

Characterising the Accuracy of Multivariable Refinable Functions via the Symbol Function

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Acta Mathematica Sinica,English Series 2001年第2期17卷 277-286页

作者： Qiu Hui SHENG School of Mathematics and Computer Science. Hubei University, Wuhan. 430062. P. R. china institute of Mathematics. academy of Mathematics and Systems Science. Academia Sinica. beijing 100080. P. R. china Han Lin CHEN institute of Mathematics, Academia Sinica, beijing 100080, P. R. china School of Mathematics and Computer sciences Hubei University Wuhan 430062 P. R. China institute of Mathematics Academy of Mathematics and Systems Science Academia Sinica Beijing 100080 P. R. China institute of Mathematics Academia Sinica Beijing 100080 P. R. China

Suppose that f（x）=（f1（x）,....fr（x））T, x∈Rd is a vector-valued function satisfying the refinement equation f（x）=∑ ck f（2x-k） with finite set of Zd and some r×r matricex ck. The requirements for f to hav... 详细信息

关键词： Accuracy Symbol Refinable functions