检索结果-南通市图书馆

TO BUILD UP A WORLD-CLASS center FOR paleontology research——A brief introduction to the NIGP

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Bulletin of the Chinese Academy of Sciences 1999年第2期13卷 128-134页

作者： Mu Xinan and Sun Ge(Nanjing Institute of Geology & paleontology, CAS) Director of the NIGP. CAS and a research professor.

Editor’s note: In this year’s annual schedule of the pilot project for the Chinese Academy of Sciences (CAS) Program of Knowledge Innovation, Nanjing Institute of Geology & paleontology (NIGP) was one of the three CAS institutes approved for the project. In order to promote the understanding, this column will give a brief introduction one of

关键词：刀口口角

Androecium of Archaefructus, the Late Jurassic Angiosperms from Western Liaoning, China

在线全文

学校读者我要写书评

暂无评论

Global Geology 2002年第1期7卷 1-6页

作者： SUN Ge, ZHENG Shaolin, SUN Chuntin, SUN Yuewu(research center of paleontology & stratigraphy, Jilin University, Changchun 130026, China)David L. DILCHER( Florida Museum of Natural History, University of Florida, Gainesville FL32611, USA)MIAO Yuyan(Nanjing research center of paleontology & stratigraphy Jilin University Changchun130026 China Florida Museum of Natural History University of Florida GainesvilleFL32611 USA Nanjing Institute of Geology and Palaeontology Academia Sinica Nanjing210008 China

Androecium of the earliest known flowering plant Archaefructus liaoningensis was found from the Upper Jurassic Jianshangou Formation of western Liaoning, China. The androecium consists of numerous stamens bearing in pair on the reproductive axes below conduplicate carpels. The stamens are composed of a short filament and basifixed anther for each. Monosulcate pollen in situ are found from the anthers. The characters of the androecium reveals that Archaefructus are probably protandrous, and the paired stamens and monosulcate pollen appear to indicate that Archaefructus, as primitive angiosperms,might be derived from extinct seed -ferns during the Older Mesozoic. Archaefructus is considered Late Jurassic in age.

关键词： Androecium, Archaefructus, Early angiosperm, Late Jurassic, Western Liaoning of China

内蒙古大兴安岭乌奴耳地区泥盆纪的两个牙形刺动物群

在线全文

学校读者我要写书评

暂无评论

微体古生物学报 2010年第1期27卷 13-37页

作者：郎嘉彬王成源吉林大学古生物学与地层学研究中心长春市西民主大街6号长春130026 中国科学院南京地质古生物研究所南京210008

在大兴安岭乌奴耳地区发现两个牙形刺动物群。一个采自北矿组,牙形刺Caudicriodus angulatus ***指示北矿组的时代为Eifelian早期。另一个样品采自霍博山组(大民山组)上部的角砾岩层,产有牙形刺的混合动物群。Palmatolepis hassi,***,**... 详细信息

在大兴安岭乌奴耳地区发现两个牙形刺动物群。一个采自北矿组,牙形刺Caudicriodus angulatus ***指示北矿组的时代为Eifelian早期。另一个样品采自霍博山组(大民山组)上部的角砾岩层,产有牙形刺的混合动物群。Palmatolepis hassi,***,***,***,Polygnathus decorosus,Icriodus ex-pansus,***等牙形刺主要来自Frasnian晚期晚rhenana带。而Ancyrodella binodosa,Ancyrodella nodosa,Schimitognathus ***则主要来自Gevitian期晚期和Frasnian期早期;Ancyrognathus ubiquitus是重要的事件种,见于linguiformis带至早triangularis带(F/F界线层);这个角砾岩层最后形成的时代可能是早triangularis带,含有多层位的再沉积的牙形刺。文中共描述了牙形刺11属22种,包括2个未定新种和1个未定种。

关键词：牙形刺混生动物群泥盆纪法门期大兴安岭内蒙古

^(40)Ar/^(39)Ar age evidence for Altyn fault tectonic activities in western China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2003年第18期48卷 2024-2030页

作者： LIU Yongjiang1, J. Genser2, GE Xiaohong1, F. Neubauer2, G. Friedl2, CHANG Lihua1, REN Shoumai3 & R. Handler2 1. College of Earth Sciences, Jilin University, Changchun 130061, China 2. Institute of Geology and paleontology, Salzburg University, Salzburg A-5020, Austrilia 3. Statigraphic research center for Oil and Natural Gas, Ministry of Land and Resources, Beijing 100034, China Correspondence should be addressed to Liu Yongjiang (e-mail: liuyj@ ***) College of Earth Sciences Jilin University Changchun 130061 China Institute of Geology and paleontology Salzburg University Salzburg A-5020 Austria Statigraphic research center for Oil and Natural Gas Ministry of Land and Resources Beijing 100034 China

Four 40Ar/39Ar age groups of mica, hornblende and K-feldspar were obtained from Proterozoic and early Paleozoic metamorphic rocks in the Aksay-Dangjin Pass area, western China. The samples away from the middle shear zone of the Altyn fault belt yield two plateau age groups in the range of 461—445.2 Ma and 414.9—342.8 Ma, respec-tively. They represent the tectono-thermal events that had been recorded in the rocks that were displaced by the Altyn strike-slip fault in late Ordovician-early Silurian and Devo-nian, respectively. These two age groups should be related to the closures of Northern and Southern Qilian Oceans. The deformed granitic gneiss from the northern belt gives a pla-teau age group of 178.4—137.5 Ma, which is interpreted as the active age of the Altyn fault in the middle-late Jurassic- early Cretaceous and should be related to the accretion of Lhasa block to the north. The sample from the middle shear zone of the Altyn fault belt yields two plateau ages of 36.4 and 26.3 Ma, respectively, suggesting the strike-slip move-ment with strong metamorphism at greenschist facies along the Altyn fault in the late Eocene. This event occurred in the most areas of the northern Tibet Plateau and should be in response in the north to the collision between Indian and Eurasian continents. The present study demonstrates that the Altyn fault is characterized by multiple pulse-style activi-ties under the tectonic setting of convergence between the Indian and Eurasian continents.

关键词： Altyn fault 40Ar/39Ar age tectono-thermal event western China

Dynamics of morphological changes for mitochondrial fission and fusion

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2010年第4期53卷 680-689页

作者： WANG ShiQi 1,2,4 , FU ChangLiang 1,2 , ZHANG Yan 1,2 , CHEN Quan 3 & LONG Mian 1,2 1 Key Laboratory of Microgravity (National Microgravity Laboratory), Beijing 100190, China 2 center for Biomechanics and Bioengineering, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China 3 State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China 4 Institute of Vertebrate paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China Key Laboratory of Microgravity (National Microgravity Laboratory) Beijing China center for Biomechanics and Bioengineering Institute of Mechanics Chinese Academy of Sciences Beijing China Institute of Vertebrate paleontology and Paleoanthropology Chinese Academy of Sciences Beijing China State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Beijing China

Mitochondria experience continuous fusion and fission in a living cell, but their dynamics remains poorly quantified. Here a theoretical model was developed, upon a simplified population balance equation (PBE), to predict the morphological changes induced by mitochondrial fission and fusion. Assuming that both fission and fusion events are statistically independent, the survival probability of mitochondria staying in the fission or fusion state was formulated as an exponentially-decayed function with time, which depended on the time-dependent distribution of the mitochondrial volume and the fission and fusion rates. Parametric analysis was done for two typical volume distributions. One was Gamma distribution and the other was Gaussian distribution, derived from the measurements of volume distribution for individual mitochondria in a living cell and purified mitochondria in vitro. The predictions indicated that the survival probability strongly depended on morphological changes of individual mitochondria and was inversely correlated to the fission and fusion rates. This work provided a new insight into quantifying the mitochondrial dynamics via monitoring the evolution of the mitochondrial volume.

关键词： mitochondria morphology fission fusion dynamics modeling

Targeted expression of AmphiPax6 induce ectopic eyes in drosophila

在线全文

学校读者我要写书评

暂无评论

Targeted expression of AmphiPax6 induce ectopic eyes in dros...

Modern pollen distributions in Qinghai-Tibetan Plateau and the development of transfer functions for reconstructing Holocene environmental changes

中国遗传学会“发育、遗传和疾病”研讨会

作者： Jing Zhao~(1*) Jun Ding~(1*) Kaiqun Ren~(1,2) Junyuan Chen~3 Xiang Gao~1 1.Model Animal research center,Nanjing University,Nanjing 210061,China 2.Hunan Normal University,Changsha,410081, China 3.Nanjing Institute of Geology and paleontology,Nanjing 210008,China Laboratory of Pharmaceutical Biotechnology,College of Life Sciences,Nanjing University,Nanjing 210093,China.

Pax 6 gene,an evolutionarily conserved transcriptional factor,functions as a master control gene for eye morphogenesis in both insects and *** cephalochordate amphioxus,which is thought to be the closest living invertebrate relatives of the vertebrates,the Pax6 protein encoded by a single pax6 gene(AmphiPax6)is 92% identical to the mammalian Pax6 protein in paired domain and 100% identical in homeodomain,but shows low identity in activation *** by targeted expression the AmphiPax6 protein and related mosaic proteins in various imaginal disc primordial of drosophila,ectopie eye structures are induced on the wings,legs and *** results support the proposition that as early as 500 million years ago,pax6 was well-evolved to master the whole blueprint of eye development.

关键词： amphiPax6 morphogen ectopic eye

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Modern pollen distributions in Qinghai-Tibetan Plateau and t...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Houyuan Lu~(a,*),Naiqin Wu~a,Kam-biu Liu~b,Liping Zhu~c,Xiangdong Yang~d,Tandong Yao~c,Luo Wang~a, Quan Li~a,Xingqi Liu~d,Caiming Shen~e,Xiaoqiang Li~f,Guobang Tong~g,Hui Jiang~h aKey Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China b Department of Oceanography and Coastal Sciences,Louisiana State University,Baton Rouge,LA 70803,USA cInstitute of Tibetan Plateau research,Chinese Academy of Sciences,Beijing 100085,China d State Key Laboratory of Lake Science and Environment,Nanjing Institute of Limnology and Geography,Chinese Academy of Sciences,Nanjing 210008,China e Atmospheric Sciences research center,State University of New York,Albany,NY 12203,USA f Institute of Vertebrate paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China g Institute of Hydrology and Geology,Chinese Academy of Geological Sciences,Zhengding 050803,China h State Key Laboratory of Estuarine and Coastal research,East China Normal University,Shanghai 200062,China

This study investigates the distribution of modern pollen assemblages in the Qjnghai-Tibetan Plateau, China,based on surface soil samples collected at 1202 sites along an altitudinal gradient of 10 -5500 m asl,where mean annual precipitation(MAP) ranges from 12 to 1840 mm and mean annual temperature(MAT) from -1 to 21.5℃.A total of 153 pollen taxa were found with relative abundances greater than 1%in at least two *** correspondence analysis(CCA) was used to determine the main environmental variables influencing pollen *** results reveal that MAP is the most significant dominant ***,MAT,altitude(ALT),July temperature(MT7),and relative humidity(HHH) are also significant variables that clearly follow the gradients in the CCA ordination, suggesting that pollen assemblages probably not only reflect a single climatic parameter,but also a variety of other climatic inter-related parameters. Transfer functions,based on locally weighted weighted averaging(LWWA),were developed for MAP (R-boot = 0.89,RMSEP = 109 mm),MAT(R-boot = *** = 2.3℃),ALT(R-boot = 0.73, RMSEP = 597 m),HHH(R-boot = 0.82,RMSEP = 4.5%),and July mean precipitation(MP7)(R- boot = 0.87,RMSEP = 23 ram).Overall,our results confirm that pollen can provide reliable estimates of the primary climatic *** application of the LWWA model to the fossil records of Chen Co Lake allowed quantitative inferences to be made about Holocene climatic changes in the southern Tibetan Plateau,suggesting that LWWA is a robust calibration method for quantitative palaeo-environ-mental reconstruction based on pollen data in the regions.

关键词： Qinghai-Tibetan plateau Vegetation Pollen Transfer functions Holocene Climatic changes

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

南海西北部新生代沉积基底构造演化

海洋学报 2004年第3期26卷 54-67页

作者：刘海龄杨恬朱淑芬张伯友丘学林施小斌中国科学院南海海洋研究所和广州地球化学研究所边缘海地质重点实验室广东广州510301 中海石油研究中心勘探研究院河北高碑店074010

在综合分析地质、地球物理、地球化学、古生物学等多方面资料的基础上,将南海西北部海域控制新生代主要沉积盆地的基底划分为5个区:北部湾古生界断堑基底区、莺歌海古生界走滑拉分基底区、琼东古生界断陷基底区、西沙北古生界裂谷基底... 详细信息

在综合分析地质、地球物理、地球化学、古生物学等多方面资料的基础上,将南海西北部海域控制新生代主要沉积盆地的基底划分为5个区:北部湾古生界断堑基底区、莺歌海古生界走滑拉分基底区、琼东古生界断陷基底区、西沙北古生界裂谷基底区、西沙南古生界走滑伸展基底区.通过区域地质分析,初步重建了该海域的大地构造演化历史.该海域新生代沉积基底在前新生代时期与其北面陆上云开地区和其南面的南沙地区同处于特提斯构造域中,经历过古特提斯和中特提斯的发育历程,晚古生代以来可初步分为5个阶段:(1)D-P1,古特提斯东段多岛洋体系发育阶段;(2)P2,中特提斯(古南海)开始出现、古特提斯开始消减阶段;(3)T-K1,古特提斯东段多地块缝合阶段;(4)K2-N11,现代南海形成、中特提斯(古南海)消亡时期;(6)N21以来南海扩张停止、澳大利亚板块向北俯冲挤压阶段.

关键词：特提斯新生代沉积基底南海西北部

东海陆架盆地瓯江凹陷明月峰组沉积相及沉积特征分析

在线全文

学校读者我要写书评

暂无评论

天然气地球科学 2011年第5期22卷 760-769页

作者：陈国俊李超梁建设王琪吕成福张锦伟杜贵超田兵中国科学院油气资源研究重点实验室甘肃兰州730000 中国科学院研究生院北京100049 中海石油(中国)有限公司北京研究中心北京100027

通过岩心观察描述,综合测井、录井、古生物、重矿物等资料,结合地震相分析,以瓯江凹陷构造演化及相对海平面变化为主线,从物源分析出发,综合分析瓯江凹陷明月峰组沉积相类型及沉积特征。晚古新世明月峰组沉积期,瓯江凹陷处于断拗转换阶... 详细信息

通过岩心观察描述,综合测井、录井、古生物、重矿物等资料,结合地震相分析,以瓯江凹陷构造演化及相对海平面变化为主线,从物源分析出发,综合分析瓯江凹陷明月峰组沉积相类型及沉积特征。晚古新世明月峰组沉积期,瓯江凹陷处于断拗转换阶段,沉积物源由凹陷西侧的闽浙隆起带酸性火山岩源区和凹陷东侧的雁荡低凸起提供,以闽浙隆起带物源占绝对优势,受中古新世至晚古新世中期大规模海侵的影响,相对海平面持续升高,凹陷东侧雁荡低凸起开始接受沉积,使得凹陷沉积范围达到断陷期最大,总体呈滨海—浅海沉积,闽浙隆起带物源供应充分,在凹陷西缓坡发育3个大型三角洲沉积,滨海沉积发育于凹陷西缘三角洲之间及雁荡低凸起位置,凹陷中央发育大范围的浅海沉积。控制明月峰组各沉积相空间展布的主控因素是构造和相对海平面变化,以相对海平面变化为主。

关键词：物源分析沉积相沉积特征明月峰组瓯江凹陷