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High concentration of calcium ions in Golgi apparatus

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Cell Research 1994年第1期4卷 97-108页

作者： XUE SHAOBAI M. RoBERT NICOUD JIE CUI D.J.ARNDT JOVIN(Depariment of Biology, Beijing Normal University, Beijing 100875, China)(max-planck-{2. fur Biophysikalische chemie,Gottingen, germany) Department of Biology Beijing Normal University Beijing China max-planck-{2. fSr Biophysikalische chemie GSttingen Germany

The interphase NIH3T3 cells were vitally fluorescentstained with calcium indicator fluo-3 and Glogi probe C6NBD-ceramide, and then the single cells were examined by laser scanning confocal microscopy (LSCFM) for subcellular distributions of Ca2. and the location of Golgi apparatus. In these cells, the intracellular Ca2. were found to be highly concentrated in the Golgi apparatus. The changes of distribution of cytosolic high Ca2. region and the Golgi apparatus coincided with the cell cycle *** calcium free medium, when the plasma membrane of the cells which had been loaded with fluo-3/AM were permeated by digitonin, the fluorescence of the Golgi region decreased far less than that of the cytosol. Our results indicated that the Glogi lumen retained significantly high concentration of free calcium.

关键词： intracellular free calcium fluo-3/AM Golgi apparatus C6-NBD-ceramide laser scanning confocal microscopy intracellular calcium store

Effect of excess Y_2._3 addition on the physical properties of melt processed YBCO bulks

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Science China(Physics,Mechanics & Astronomy) 2004年第1期47卷 17-23页

作者： YANG Wanmin1,2.3, ZHOU Lian2. FENG Yong2. ZHANG Pingxiang2. WU Minzhi3 & W. GAWALEK3 1. Department of Physics, Shaanxi Normal University, Xi抋n 710062. China 2. Northwest institute for Nonferrous Metal Research. Xi抋n 710016, China 3. institute {2. Physikalische Hochtechnologie e.V(IPHT), Jena, germany Correspondence should be addressed to Yang Wanmin (email: wm-yang@***) Received June 2., 2.03 Department of Physics Shaanxi Normal University Xi’an China Northwest institute for Nonferrous Metal Research Xi’an China institute fur Physikalische Hochtechnologie e.V (IPHT) Jena Germany

The YBCO superconductors with Y2.3 addition were prepared by a modified melt textured process and the effects of excess Y2.3 addition on the physical properties of melt textured YBCO have been investigated. It is found that the melt temperature of YBCO samples decreases drastically with the increasing Y2.3, and the maximum levitation forces are drastically different for samples with different Y2.3 addition. It is also found that the optimal Y2.3 addition to YBCO is about 10wt%. Considering the microstructure and the starting composition, the results are well discussed and interpreted.

关键词： YBCO superconductor, melt growth, Y2.3 addition, levitation force.

Garnet Sm-Nd and U-Pb systems: A case study of a granulite from the European Variscan belt

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Chinese Science Bulletin 2002年第15期47卷 1284-1288页

作者： CHEN FukunInstitut fur Mineralogie, Petrologie und Geochemie, Universitat Tubingen, 72.74 Tubingen,{2. institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 10002., China Institut für Mineralogie Petrologie und Geochemie Universität Tübingen Tübingen Germany institute of Geology and Geophysics Chinese Academy of Sciences Beijing China

This study presents zircon and garnet ages of a mafic granulite from the high-grade Variscan basement of the Black Forest, germany and discuss isotope closure temperature of garnet Sm-Nd and U-Pb systems. Zircon grains yield 2.7Pb/2.6Pb ages between -340 and -414 Ma by the U-Pb and evaporation methods. In contract, garnet dating gives Sm-Nd and Pb-Pb isochron ages of (398±3) Ma and (411±14) Ma, respectively, which are older than most of zircon ages. These data imply that most of zircons lost radiogenic Pb, probably due to metamictization or recrystallisa-tion during the granulite-facies metamorphism (-800°C) at -340 Ma. Garnet Sm-Nd and U-Pb systems preserve chronological information of pro-grade metamorphism, probably profiting from a fluid-absence metamorphic environment. These results demonstrate that garnet mineral can be a better candidate than zircon mineral to date high-grade metamorphism by the U-Pb and Sm-Nd methods in some cases.

关键词： Variscan granulite garnet Sm-Nd U-Pb.

Environmental magnetic studies of lacustrine sediments

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Chinese Science Bulletin 2002年第7期47卷 613-616页

作者： HU Shouyun, DENG Chenglong, E. Appel & K. L. VerosubNanjing institute of Geography and Limnology, Nanjing 2.0008, China institute of Geology and Geophysics, Beijing 100101, China Institut {2. Geologic, Universitat Tubingen, 72.76 Tubingen, germany Departm Nanjing institute of Geography and Limnology Nanjing China institute of Geology and Geophysics Beijing China Institut für Geologie Universität Tübingen Tübingen Germany Department of Geology University of California Davis USA

In recent decades, environmental magnetism has become an important method for studying past global climatic and environmental changes. For an environmental magnetic study, it is important to understand the magnetic properties of various magnetic minerals in lacustrine sediments and the processes involved in the formation, transport, and preservation of these magnetic minerals. The magnetic response of lacustrine sediments to climatic change may vary widely from lake to lake. To reconstruct the processes contributing to paleoclimatic and paleoenvironmental change, it is, therefore, necessary to derive a complete understanding of the potential origin of the magnetic signal observed.

关键词： rock magnetism paleoclimate paleoenvironment lacus-trine sediments.

Extended knowledge attributed Petri Nets

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International Journal of Modeling, Simulation, and Scientific Computing 2014年第2期5卷 92-111页

作者： Attila fur Budapest University of Technology and Economics McLeod institute of Simulation Sciences Hungarian Center H-1117 Budapest Magyar tud´osok korutja 2.Q.Building A-233Hungary

Choosing the best way for describing physical reality has always been standing in focus of *** methodologies have been developed based on classical mathematics,or statistics and also new disciplines-such as soft-computing *** Nets as one of the most naturalistic modeling methodologies are well suited to describe complex process in *** in some fields of modeling the describing power of basic Petri Nets proved not to be robust enough,therefore several exten-sions were made to the original *** tokens(Colored Petri Nets),stochastic delayed streaming of mobile entities(Stochastic Petri Nets),object oriented architecture(Object Oriented Petri Nets),numerical(Numerical Petri Nets)and linguistic attributes(Fuzzy Petri Nets)broaden the range of *** some fields of problem solv-ing,usage of static and mobile knowledge bases is needed:e.g.,flexible manufacturing systems,or intelligent traffic *** problems to be investigated involved new conceptual developments of Petri Nets and led to the introduction of Knowledge Attributed Petri *** the same time distributed control in simulation appeared,intelligent agents supported the connection of mobile knowledge bases and static infer-ence engines in an effective *** mentioned extensions brought general support in model synthesis,but some unsolved questions remained related to the implementation of intelligent mobile *** paper highlights a new level of AI controlled simulation introducing the Extended Knowledge Attributed Petri Nets that offer the capability of easy implementation of mobile inference engines and knowledge base,providing general mobile AI in Petri Nets.

关键词： Know ledge attributed petri nets modeling of group behavior mobile agents

XMM-Newton observation of the eclipsing binary Algol

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Research in Astronomy and Astrophysics 2011年第4期11卷 457-470页

作者： Xue-Juan Yang Fang-Jun Lu Bemd Aschenbach Li Chen Faculty of Materials Optoelectronics and Physics Xiangtan University Xiangtan 411105China Particle Astrophysics Center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China max-planck-Institut {2. Extraterrestrische Physik 85741 Garching Germany Department of Astronomy Beijing Normal University Beijing 100875 China

We present an XMM-Newton observation of the eclipsing binary Algol which contains an X-ray dark B8V primary and an X-ray bright K2.V secondary. The observation covered the optical secondary eclipse and captured an X-ray flare that was eclipsed by the B star. The XMM-Newton European Photon Imaging Camera and Reflection Grating Spectrometer spectra of Algol in its quiescent state are described by a two-temperature plasma model. The cool component has a temperature around 6.4× 106 K while that of the hot component ranges from 2.to 4.0× 107 K. Coronal abundances of C, N, O, Ne, Mg, Si and Fe were obtained for each component for both the quiescent and the flare phases, generally with upper limits for S and Ar, and upper limits for C, N, and O from the hot component. F-tests show that the abundances do not need to be different between the cool and the hot component and between the quiescent and the flare phase with the exception of Fe. Although the Fe abundance of the cool component remains constant at -0.14, the hot component shows an Fe abundance of -0.2., which increases to -0.44 during the flare. This increase is expected from the chromospheric evaporation model. The absorbing column density NH of the quiescent emission is 2.5 - 102. cm-2. while that of the flare-only emission is significantly lower and consistent with the column density of the interstellar medium. This observation substantiates earlier suggestions of the presence of X-ray absorbing material in the Algol system.

关键词： stars abundance -- star binaries eclipsing -- stars flare -- stars indi-vidual Algol

The Time Evolution of Radial Collective Flow in Reaction of ^(197)Au with ^(197)Au at 150 MeV/u

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Chinese journal of nuclear physics 1995年第4期17卷 298-304页

作者： Shen Wen-qing1,2.Xi Hong-fei2.3 A. Gobbi2.N. Herrmann2.K. D. Hildenbrand2.Wang Gao-sheng2.FOPI Collaboration2.. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, and institute of Nuclear Research, the Chinese Academy of Sciences, P. O. Box 800-2.4, Shanghai 2.18002. Gesellschaft fur Schwerionenforschung, D-642.9 Darmstadt,{2.3. institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 中科院上海原子核所上海中科院近代物理所甘肃兰州 Gesellschaft fur Schwerionenforschung 德国

Dynamical time evolution for central collision of 197 Au on 197Au at 150 MeV/u is in-vestigated by using Isospin-dependent Quantum Molecular Dynamics （IQMD） calculation. Thepreequilibrium emission, its influence and... 详细信息

关键词： IQMD simulation Radial collective flow Multifragmentation Dynamical time evolution

Discovery of eclogite and its geological significance in Qiangtang area, central Tibet

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Science Bulletin 2006年第9期51卷 1095-1100页

作者： LI Cai1, ZHAI Qingguo2. DONG Yongsheng1 & HUANG Xiaopeng11. College of Earth Sciences, Jilin University, Changchun 130061, China 2. institute of Geology, Chinese Academy of Geological Sciences, Bei- jing 100037, China College of Earth Sciences Jilin University Changchun China institute of Geology Chinese Academy of Geological Sciences Beijing China

Eclogite is first discovered from Qiang- tang area, central Tibet, which occurs as a lens in the high-pressure metamorphic belt comprising glauco- phane-muscovite schist and garnet-muscovite schist, along the south margin of Lungmu Co-Shuanghu Paleo-Tethys suture. A glaucophane 40Ar/39Ar age of 2.0 Ma and a phengite 40Ar/39Ar age of 2.1.9 Ma have been obtained from blueschists associated with eclogite. The rock consists of garnet, omphacite, amphibole, phengite, and rutile, etc, and the jadeite content in omphacite ranges from 32.7% to 38.95%. It is estimated that the temperature of the eclogite is 2.35 GPa. The discovery of Qiangtang ecologite fur- ther supports that there is a suture zone of Indo- Chinese epoch in central Qiangtang area, and is very important for discssing the evolution of the pa- leo-ocean and paleo-plate tectonics in this area.

关键词： Qianghai-Tibet Plateau Qiangtang eclogite tectonics.

Palaeogene fossil Populus leaves from Lanzhou Basin and their palaeoclimatic significance

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Chinese Science Bulletin 2004年第14期49卷 1494-1501页

作者： SUN Bainian1,2. YAN Defei1, XIE Sanping1, CONG Peiyun1, XIN Cunlin1 & YUN Fei1 1. Key Laboratory of Western China抯 Environmental Systems of the Ministry of Education, Lanzhou University, Lanzhou 730000, China 2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing institute of Geology and Palaeontology, Chinese Academy of Sci-ences, Nanjing 2.0008, China Key Laboratory of Western China’s Environmental Systems of the Ministry of Education Lanzhou University Lanzhou China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

An angiosperm compression flora is found in Palaeogene from Lanzhou Basin and the cuticular analysis of Populus davidiana Dode in the flora is carefully made. fur-thermore, the fossil cuticles are compared with the epidermal structures of extant Populus leaves growing in different en-vironments, i.e. moist, semimoist, and semiarid to arid cli-matic regions. The present experiments indicate that mature leaves of P. davidiana show leaf size from big to small, leaf cuticles from thick to thin and anticlinal walls of epidermal cells from faintness to clarity along with the increase of lati-tudes of the plant distributions, the climatic variation from moist to arid, the annual precipitation from more to less and the annual mean temperature from high to low. The fossil P. davidiana differs from the specimens collected from Shandan in semiarid to arid climatic regions but closely resembles the Wushan leaves in a semi-moist climatic area in a lot of fea-tures. In a word, the new research may reflect that the flora lives in a semi-moist climatic environment. The present dis-covery of compression of Paleogene Populus davidiana is of great significance to studying vegetation types, climatic and environmental changes during the primal uplifting of the Qinghai-Tibet Plateau.

关键词：古气候兰州盆地山杨化石角质层早第三纪被子植物