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国家自然科学基金(40821091)

作品数:18 被引量:116H指数:7
相关作者:潘永信李金华张春霞林巍吴文芳更多>>
相关机构:中国科学院中国科学院研究生院更多>>
发文基金:国家自然科学基金中国科学院“百人计划”中国科学院创新团队国际合作伙伴计划项目更多>>
相关领域:天文地球生物学环境科学与工程理学更多>>

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18 条 记 录,以下是 1-10
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趋磁细菌Magnetospirillum magneticum AMB-1全细胞和纯化磁小体的磁学比较研究被引量:10
2009年
趋磁细菌磁小体化石是湖泊海洋沉积物的重要磁性载体和古环境替代性指标.对纯培养趋磁细菌Magnetospirillum magneticum AMB-1的全细胞样品和纯化磁小体样品的磁学和电子显微镜分析结果表明:AMB-1合成的磁小体是单畴磁铁矿,它们在胞内呈片段状的单链排列(由3~5条短链组成).全细胞和纯化磁小体样品之间的磁学性质的显著差异主要由静磁相互作用(与磁小体的空间排列有关)造成.对于全细胞样品,链内磁小体间的静磁相互作用强,而链间的静磁相互作用弱,其δ比值为3.0;对于纯化磁小体样品,磁小体链的坍塌聚集导致链间和颗粒间的静磁相互作用都明显增强,导致样品的矫顽力降低,δ比值降至1.5.这些结果对于认识磁小体化石的古地磁学和环境磁学意义以及拓展磁小体在生物材料方面的应用具有参考价值.
李金华潘永信刘青松秦华峰邓成龙车仁超杨新安
关键词:磁滞回线
Identification of the thick-layer greigite in sediments of the South Yellow Sea and its geological significances
Magnetic minerals in sediments of the continental shelf are sensitive to environmental changes.Therefore, to d...
Jianxing LiuXuefa ShiShulan GeQingsong LiuZhengquan YaoGang Yang
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华北泥河湾盆地环境磁学研究
<正>泥河湾盆地位于华北平原与内蒙古高原的过渡带上,是在晚新生代华北地台断陷带和大型裂陷盆地发育大背景下形成的内陆断陷盆地。盆地内发育良好的更新世连续河湖相地层,并且蕴含大量早更新世古人类遗址和哺乳动物化石。自20世纪2...
敖红邓成龙朱日祥
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SIMS zircon U-Pb dating of the Late Cretaceous dinosaur egg-bearing red deposits in the Tiantai Basin,southeastern China
Dinosaur eggs or fragments are abundant and extensively distributed in China.They can be very informative in b...
Huaiyu HeXiaolin WangQiang WangShunxing JiangXin ChengJialiang ZhangZhonghe ZhouZikui ZhaoYangen JiangFangming YuChenglong DengJinhui YangRixiang Zhu
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New 40Ar/39Ar dating results from the Shanwang Basin,eastern China:Constraints on the age of the Shanwang Formation and associated biota
The fluvio-lacustrine sequence of the Shanwang Basin,eastern China,preserves a rich and important terrestrial ...
Huaiyu He~(a,*),Chenglong Deng~b,Yongxin Pan~a,Tao Deng~c,Zhaohua Luo~d,Jimin Sunb,Rixiang Zhu~b a Key Laboratory of the Earth’s Deep Interior,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China b State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China c Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China d China University of Geosciences,Beijing 100083,China
关键词:MIOCENE
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Effects of the grain size distribution on the temperature-dependent magnetic susceptibility of magnetite nanopartieles
Magnetite is an important magnetic remanence carrier in natural samples and therefore is of great interest in ...
ZHAO XiangYu~(1,2) & LIU QingSong~(1*) 1 Paleomagnetism and Geochronology Laboratory(SKL-LE),Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing 100029,China
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SIMS U-Pb zircon age of a tuff layer in the Meishucun section, Yunnan, southwest China: Constraint on the age of the Precambrian-Cambrian boundary被引量:28
2009年
Determination of the age of the Precambrian-Cambrian boundary is critical in understanding early evolution of life on Earth. SIMS U-Pb zircon analyses of the Bed 5 tuff layer of the Meishucun section were carried out closely following the guidance of cath
RiXiang Zhu XianHua Li XianGuang Hou YongXin Pan Fei Wang ChengLong DengHuaiYu He
关键词:SECTIONGEOCHRONOLOGY
A biogeographic distribution of magnetotactic bacteria influenced by salinity
Magnetotactic bacteria(MTB),which synthesize intracellular ferromagnetic magnetite and/or greigite magnetosome...
Wei LinYinzhao WangBi LiYongxin Pan
关键词:BIOGEOGRAPHYSALINITY
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A new mechanism for the magnetic enhancement of hematite during heating:the role of clay minerals
The magnetic properties of loess,lake,and ocean sediments are often used as indicators for paleoclimatic/paleo...
CHUNXIA ZHANGGREIG A.PATERSONQINGSONG LIU
关键词:SAPONITEKAOLINITECHLORITEHEMATITE
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全球趋磁细菌数据库的建立
微生物矿化(即微生物参与矿物形成的过程)是当前国际上最为活跃的前沿研究方向之一.微生物矿化在自然界十分普遍,根据微生物对矿物形成调控机制的不同,可以简单划分为微生物诱导矿化和微生物控制矿化2种类
林巍李陛潘永信
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