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Synthesis and Structure of Tungsten Carbonyl Compound with 2-Mercapto Pyrimidine [Et_4N] [W (CO)_4(SC_4H_3,N_2) ]

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chinese Journal of Structural Chemistry 1998年第5期17卷 334-336页

作者： PAN Guo-Hua ZHUANG Bo-Tao HUANG Liang-Ren (State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structureof Matter, the chinese academy of sciences, Fuzhou, Fujian 350002, china) State Key Lab. of Struct. Chemistry Fujian Inst. Res. Struct. of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

Reaction of W (CO)6 with HSC3H3N2, Et3N and Et4NCl. H2O inCH3CN afforded a mononuclear compound (Et4N] [W(CO)4 (SC4H3N2)]. The crystalstructure was determined by X-ray diffraction. The crystallographic data: C16H23-N3O4SW, Mr = 537- 29, monoclinic, C2/c, a = 19. 3l7 (l0), b = 13. 75l (8), c=16. 350(8) A, β= l09. 93°, V= 4082. 7 A3, Z= 8, D.= 1. 75 g/cm', F(000) =2096, μ= 59. 0 cm-1, Final R=0. O29 and Rw= O. 036 for 2769 reflections with I>3σ(I). The X-ray structure analysis revealed that the center W atom is coordinated by Sand N atoms from 2-mercapto pyrimidine ligand and four C atoms from carbonyl,which displays a distorted octahedral geometry.

关键词： synthesis structure tungsten complex 2-mercaptpo pyrimidine

Observations of Ultraluminous IRAS Galaxies at 20cm

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天文研究与技术 1999年第S1期 305-308页

作者： Li Yongsheng, Su Bumei ( Yunnan Observatory, The chinese academy of sciences, Kunming 650011, china ) ( National Astronomical Observatories, The chinese academy of sciences, beijing 100012, china ) Norris R.P. (Australia Telescope National Facility,

An ultraluminous IRAS galaxy sample has been observed at 20cm using the Australia Compact Array (AT). The far infrared luminosity in the sample, log L FIR (L ⊙), is>11 8 ( H 0=50 km s -1 Mpc -1 , q 0=0 5 ). (Radio emission is detected from 19 sources among 37 IRAS galaxies. The radio parameters, for example, peak position, radio flux, etc, are obtained. The radio power P 20cm in the sample is in the range 22 93 8. The paper presents the preliminary observational results on the sample at 20cm.

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Formin controls polarized pollen tube growth by nucleating actin assembly for the formation of actin cables

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Formin controls polarized pollen tube growth by nucleating a...

The Chiralities of Three Filaments in AR7500

2009中国植物学会植物细胞生物学学术年会

作者： Shanjin Huang~* Institute of Botany,the chinese academy of sciences,beijing 100093

Cytoplasmic actin bundles,also known as actin cables,are the most prominent actin structures in plant cells,but the molecular mechanism underlying the formation of these actin cables is *** function of these actin cab... 详细信息

关键词： FH1-FH2 domains pollen tubes polarity

来源： cnki会议评论

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天文研究与技术 1999年第S1期 433-437页

作者： Jiang Yunchun 1,2,3 , Luan Di 1,2 , Lin Ganghua 1,3 , Wang Jingxiu 1,3 1 (National Astronomical Observatories, The chinese academy of sciences, beijing 100012, china) 2 (Yunnan Observatory, The chinese academy of sciences, Kunming 65001

An analysis of structure and evolution of three filaments in AR7500 ON May, 1993 is presented. The three filaments show the following remarkable peculiarities: 1) a sinistral filament lies between two dextral filaments and meets them at two cusps. One of the cusps is rooted in positive polarity plage region while the other in a small decaying spot with negative polarity. 2) Both chromospheric plagette associated fibrils near the filaments and the transverse magnetic fields of the photosphere beneath the filaments almost parallel to the long axis of these filaments, suggesting the dominance of axial field of filaments; the spots near filament’s ends, however, do not show clearly counterclockwise or clockwise superpenumbral fibril pattern. 3) The three filaments do not merge into a single filament during 8 day observation. This can be explained by considering that the magnetic fields along their long axes are in different directions at two cusps. When one of dextral filaments and the sinistral filarment eventually dissipate into fibrils connecting the opposite polarity regions, their jointing cusps can be still clearly observed due to their opposite chiralities.

关键词： Sun: filament Sun:magnetic field

从乡土中国到“两个”中国——读彭慕兰《腹地的构建:华北内地的国家、社会和经济(1853～1937)》

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史学月刊 2010年第7期 102-107页

作者：谢维中国社会科学院近代史研究所编审北京100006

自19世纪中期开始,鲁西南农村地区遭受到席卷全球的现代化进程越来越大的冲击,其中特别突出的就是棉种的改良和推广。随着经济的变化,在政治和社会方面也出现了两个重要变化。一是在城市中,官、绅、商三位一体的组合更加紧密,并附属于... 详细信息

自19世纪中期开始,鲁西南农村地区遭受到席卷全球的现代化进程越来越大的冲击,其中特别突出的就是棉种的改良和推广。随着经济的变化,在政治和社会方面也出现了两个重要变化。一是在城市中,官、绅、商三位一体的组合更加紧密,并附属于作为新兴经济中心的沿海城市网络;在乡村,则发生了一个从"正绅"主导到土豪劣绅称霸的变化。二是城乡关系的变化。数千年来,几乎所有的中国人其根都扎在农村,而现在,城市开始从经济上控制农村、从政治上领导农村了。但由于鲁西南乡村精英的权力主要在村庄本身,因此,在城市精英的权力日益扩张的同时,乡村精英的权力仍根深蒂固。于是,城乡差别越来越大,而双方矛盾日趋尖锐。

关键词：近代史华北现代化城乡关系精英

DISCOVERY OF EARLY PALEOZOIC AND EARLY CARBONIFEROUS-EARLY PERMIAN OPHIOLITES IN THE A'NYEMAQEN MTS., QINGHAI PROVINCE, china

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Scientia Geologica Sinica 1999年第3期 437-438页

作者： Bian Qiantao Luo Xiaoquan Li Hongshen Chen Haihong and Zhao Dasheng(Institute of Geology, chinese academy of sciences, beijing 100029)Li Dihui(Science Press, chinese academy of sciences, beijing 100717)

THE ROLE OF SEGMENTAL INHIBITION IN ACUPUNCTURE ANALGESIA(AA)

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针刺研究 1989年第Z1期 91-92页

作者： Zhu Lixia Fang Zongren Li Chunyuan Yu Qin Ji Changfu Inst. of Acupuncture and Moxibustion, china academy of Traditional chinese Medicine, beijing

A series of experiments were carried out on the spinal rats (including therats with the spinal cord hemi-transected dorsally) for investigating the spinalmechanism of acupuncture analgesia. The results are as follows: 1. In various spinal animals, needling certain acupoints may obtain signi-ficant analgesic effects. One or seven days after transection, the acupuncture-induced analgesic effect expressed with the tail flick latency was 39. 0% or62. 3% of that obtained in the intact rats. It suggests that the spinal segme-ntal inhibition migkt play an important role in AA.

关键词： OLS THE ROLE OF SEGMENTAL INHIBITION IN ACUPUNCTURE ANALGESIA AA

Spatial distribution regularity and influence factors of population density in the LRGR

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Science Bulletin 2007年第S2期 90-97页

作者： SONG GuoBao~(1,2) LI ZhengHai~(1,3+) BAO YaJing~1 L HaiYan~4 GAO JiXi~3 WANG HaiMei~5 XU Tian~6 CHENG Yan~7 1 Institute of Bio-Resources and Environment,College of Life Science,Dalian Nationalities University,Dalian 116600,china 2 College of Resources Science & Technology,beijing Normal University,beijing 100875,china 3 Innovation Base of Regional Ecology,chinese Research academy of Environmental sciences,beijing 100012,china 4 Institute of agricultural Resources and Regional Planning,chinese academy of agricultural sciences,beijing 100081,china 5 Inner Mongolia Municipality Observatory,Huhhot 010051,china 6 College of Life Science,Inner Mongolia University,Huhhot 010021,china 7 College of Ecological Environment,Inner Mongolia agricultural University,Huhhot 010018,china

Combining GIS measures and statistic methods,this paper selects the physiographic factors and climatic factors to study the influencing strength and its functional forms of all factors on population density in the *** addition,this paper simulates the status of population density distribution in the LRGR with the factors influencing the population density *** findings indicate the following circumstances:(1)All natural factors have influence on the spatial pattern of population density in the LRGR,but the influencing extent and forms are quite *** factors and traffic network density have great influence on population density,while such factors as temperature and precipitation have little influence on population *** relationship between the popula- tion density and the altitude and traffic network density assumes the negative and positive linear cor- relation trends,while the influence of water system density and slope appears to be the exponential function and logarithmic function separately.(2)The population is scattered throughout LRGR and takes on such features as integral scattering and local concentration because of the influence of natural ***,a high population density belt has been formed in the middle of LRGR,and a high population density patch comes into being in the south of LRGR.(3)There is a good linear re- gression relationship between population density and human activity index(HAI)in the LRGR,which reflects that population density can present the artificial disturbance on natural ecosystem in the LRGR. (4)The increase of population density leads to the decrease of NDVI index.

关键词： population density artificial disturbance vegetation coverage physiographic factor LRGR

LAMOST Project and Its Scientific Goals

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天文研究与技术 1999年第S1期 1-7页

作者： Zhao Yongheng (beijing Astronomical Observatory, chinese academy of sciences, beijing 100012, china yzhao  lamost. bao. ac. cn)

The LAMOST is a meridian reflecting Schmidt telescope with a clear aperture of 4 meter, a focal length of 20 meter and a field of view of 5 degree. Using active optics technique to control its reflecting corrector makes LAMOST an unique astronomical instrument in combining a large aperture with a wide field of view. The available large focal plane of 1.75 meter in diameter may accommodate up to 4000 fibers, by which the collected light of distant and faint celestial objects down to 20.5 magnitude is fed into the spectrographs, promising a very high spectrum acquiring rate of several ten thousands of spectra per night. The spectroscopic survey carried out by LAMOST of tens of millions of glaxies and others will make substantial contribution to the study of extra galactic astrophysics and cosmology, such as galaxies, quasars and the large scale structure of the universe. Its spectroscopic survey of large number of stars will make substantial contribution to the study of stellar astrophysics and the Galaxy. Its spectroscopic survey combining with the surveys in other wavebands, such as radio, infrared, X ray and γ ray will make substantial contribution to the cross identification of multi waveband of celestial objects.

关键词： LAMOST Project and Its Scientific Goals Project SPIE