检索结果-南通市图书馆

Quantitatively distinguishing sediments from the Yangtze River and the Yellow River using δEu_N-ΣREEs plot

Science China Earth Sciences 2009年第2期52卷 232-241页

作者： JIANG FuQing zhou xiaojing LI AnChun LI TieGang Key laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Graduate University Chinese Academy of SciencesBeijing 100049China

Sediment samples were collected from the lower channel of the Yangtze River and the Yellow River and the contents of rare earth elements (REEs) were measured. In addition, some historical REEs data were collected from published literatures. Based on the δEuN-ΣREEs plot, a clear boundary was found be-tween the sediments from the two rivers. The boundary can be described as an orthogonal polynomial equation by ordinary linear regression with sediments from the Yangtze River located above the curve and sediments from the Yellow River located below the curve. To validate this method, the REEs con-tents of sediments collected from the estuaries of the Yangtze River and the Yellow River were meas-ured. In addition, the REEs data of sediment Core 255 from the Yangtze River and Core YA01 from the Yellow River were collected. Results show that the samples from the Yangtze River estuary and Core 255 almost are above the curve and most samples from the Yellow River estuary and Core YA01 are below the curve in the δEuN-ΣREEs plot. The plot and the regression equation can be used to distin-guish sediments from the Yangtze River and the Yellow River intuitively and quantitatively, and to trace the sediment provenance of the eastern seas of China. The difference between the sediments from two rivers in the δEuN-ΣREEs plot is caused by different mineral compositions and regional climate patterns of the source areas. The relationship between δEuN and ΣREEs is changed little during the transport from the source area to the river, and from river to the sea. Thus the original information on mineral compositions and climate of the source area was preserved.

关键词： sediment provenance Yangtze River Yellow River δEuN-ΣREEs plot

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis, Post-modification and Catalytic Properties of Metal-organic Framework NH2-MIL-53（Al）

引用

Chemical Research in Chinese Universities 2017年第2期33卷 231-238页

作者： LIU Lili TAI Xishi zhou xiaojing LIU Lijuan School of Chemistry & Chemical Engineering and Environmental Engineering Weifang University Weifang 261061 P. R. China

A postsynthetic modification method was used to prepare salicylaldehyde functionalized metal-organicframeworks through the nucleophilic addition of salicylaldehyde with the amine group present in the frameworks ofNH2-MIL-53（A1）. Hydroxyl groups were successfully grafted onto NI-I2-MIL-53（A1）, and imine groups were ***, these hydroxyl and imine groups of the resulting NH2-MIL-53（A1）-SA can be used as the anchoringgroup to stabilise Au^3＋ ions and Au^0 nanoparticles（NPs）. By doing this, Au^3＋ ions and Au^0 NPs were successfully en-capsulated in the cages of NH2-MIL-53（A1） by a simple impregnation method. The resulting gold functionalizedNH2-MIL-53（AI） showed good catalytic activities in the one-pot synthesis of structurally divergent propargylaminesby three-component coupling reactions of aldehydes, amines and alkynes. Various aromatic/aliphatic aldehydes, aro-matic alkynes, and piperidine were able to undergo three-component coupling on NH2-MIL-53（A1）-Au. In addition,the catalyst NH2-M/L-53（A/）-Au was recovered easily by centrifugation and reused up to four times. Thus, it can beused for the environmentally friendly synthesis ofpropargylamines.

关键词： Metal-organic framework Postmodification NH2-MIL-53(AI) Three-component coupling Propargyl-amine

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

（3,3）-Connected Three-dimentional Supramolecular Metal Organic Polyhedral Based on Nanometresized Ligand with Magnetism Properties

引用

Chemical Research in Chinese Universities 2018年第5期34卷 723-726页

作者： zhou xiaojing LIU Lili TAI Xishi ZHANG Hui College of Chemical & Chemieal Engineering and Enviromental Engineering Weifang University Weifang 261061 P. R. China

A three-dimentinal metal organic framework [Co2（L）CI（DMF）2（H20）]（DMF）3（H20）3 based on the nano- metresized ligand 4,4＇,4＂-[1,3,5-benzenetriyltris（carbonylimino）]trisbenzoic acid was synthesized, and characterized by means of single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy, thermogravimetry analysis and magnetism. This obtained structure can be considered to be constructed from 2D layer, which displays the topology of hbc based on Co2（COO）3 secondary building unit, and further to be linked into a 3D suprarnolecular architecture by N--H...O hydrogen bonds. The magnetism of the complex was carried out, which shows ferromag- netic exchange interactions.

关键词： Co complex C3-Symmetric ligand Ferromagnetic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Relative paleointensity of the geomagnetic field during the past 200 ka from the West Philippine Sea and its chronological significance

引用

Science China Earth Sciences 2009年第8期52卷 1115-1126页

作者： QingYong Meng AnChun Li TieGang Li FuQing Jiang xiaojing zhou Key Lab of Marine Geology & Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

Our rock magnetic analysis of core Ph05 from the West Philippine Sea demonstrates that the core preserves a strong, stable remanent magnetization and meets the magnetic mineral criteria for relative paleointensity (RP... 详细信息

关键词： West Philippine Sea relative paleointensity geomagnetic field

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Provenance of colorless and brown volcanic glass in late Pleistocene tephra layers in the Western Philippine Sea

引用

Journal of Oceanology and Limnology 2024年第5期42卷 1438-1449页

作者： Fuqing JIANG Zhishun ZHANG Zhaohui ZHANG Guoliang ZHANG Peng HUANG xiaojing zhou Zhifang XIONG Congying LI Tiegang LI Key Laboratory of Ocean Observation and Forecasting and Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Geology Qingdao Marine Science and Technology CenterQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Institute of Marine Chemistry and Environment Ocean CollegeZhejiang UniversityZhoushan 316021China College of Marine Technology and Environment Dalian Ocean UniversityDalian 116023China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China

Tephra layers in the western Philippine Sea,characterized by abundant volcanic glass shards,may provide crucial evidence on the eruption history of volcanoes and tectonic evolution of the western Pacific.A 220-ka sediment core from the Benham Rise in the western Philippine Sea offers new insights into the provenance of four intercalated tephra layers(T1–T4,in chronological order)containing either colorless or brown glass *** to primitive mantle,all glass shards are enriched in large-ion lithophile elements,such as Rb,Cs,and Pb,and depleted in high field-strength elements,such as Th,Nb,and Ta,indicating a subduction-related *** colorless glass shards are characterized by high SiO_(2)(>78%)and light rare earth element(LREE)contents as well as high La/Sm ratios(>9),low FeO and MgO contents(100),pointing to a rhyolitic composition and a medium-K calc-alkaline serial *** contrast,the brown glass shards are characterized by lower SiO_(2)(<63%)and LREE contents,higher FeO,MgO,and CaO contents,lower La/Sm(<6)and Ba/Th(<75),and similar Sr/Y ratios(<15),indicating derivation from medium to high-K calc-alkaline andesite *** glass shards from layers T3(152 ka)and T4(172 ka)were correlated with volcanic deposits from the Taal and Laguna Caldera in the Maccolod Corridor,respectively,while the colorless glass shards from layers T1(36.5 ka)and T2(61.2 ka)were likely sourced from the Irosin Caldera in the Bicol *** the provenance of late Pleistocene tephra layers in the western Philippine Sea is helpful to complement a Philippine volcanic history and establish a regional tephrochronostratigraphy.

关键词： volcanic glass provenance chemical composition Philippine Sea late Pleistocene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A preliminary study on fingerprinting approach in marine sediment dynamics with the rare earth elements

引用

Acta Oceanologica Sinica 2010年第4期29卷 62-77页

作者： zhou xiaojing LI Anchun JIANG Fuqing MENG Qingyong Key Laboratory of Marine Geology ＆ Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Locating the quantitized natural sediment fingerprints is an important work for marine sediment dynamics *** total of 146 sediment samples were collected from the Shelf of the East China Sea and five rivers,including Huanghe （Yellow）,Changjiang （Yangtze）,Qiantang,Ou and Min *** sediment grain size and the contents of rare earth elements （REEs） were measured with laser particle size analyzer and ICP-MS *** results show that absolute REE content （ΣREE） and the concentration ratio of light REEs to heavy REEs （L/HREE） are different in the sediments among those *** are higher REE contents in being less than 2 m and 2–31 μm fractions in the Changjiang Estuary surface *** REE contents of bulk sediment are dominated by the corresponding values of those leading *** of sediment is higher close to the estuaries and declines seaward on the inner shelf of the East China Sea （ECS）.The L/HREE ratio has a tendency of increase southward from 28 ？ *** conditions plays a predominate role on spacial distributions of the surficial sediment’s REE *** some situations,the currents tend to remove the coarser light grains from initial populations,as well as the deposit of the finer heavy mineral *** other situations,the currents will change the ratio of sediment constituents,such as ratio between silts and clays in the *** a result,the various values of REE or L/HREE ratio in different bulk sediments are more affected by the change of size-fractions than source *** the long-term stable hydrodynamic environment,i.e.,the East China Sea Shelf,new sediment transport model based on the size and density gradation concept may help to understand the spatial distribution patterns of REE parameters.

关键词： rare earth elements fingerprints East China Sea Shelf sediment transport

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sea-level changes controlled detrital sediment inputs to the Bicol Shelf in the western Philippine Sea since 150 ka

引用

Journal of Oceanology and Limnology 2020年第4期38卷 1153-1168页

作者： ZHANG Zhishun JIANG Fuqing LI Tiegang YANG Dezhou zhou xiaojing XIONG Zhifang QIU Xiaohua JIA Qi YAN Yu FENG Xuguang Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of ScienceQingdao 266071China School of Marine Science and Environment Dalian Ocean UniversityDalian 116023China No.1 Institute of Geology and Mineral Resources of Shandong Province Jinan 250014China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China

Detrital sediments derived from the Philippine Islands are one of the main sources of deep-sea sediments in the western Philippine ***,systematic research on their characteristics and transport mechanisms are *** used parametric end-member analysis to quantitatively partition the grain size of detrital sediments in core MD06-3052 from the Bicol Shelf in the western Philippine Sea;three endmembers EMI,EM2,and EM3,whose respective modes were at 2,10,and 45 μm,were *** also measured the Sr and Nd isotopic compositions of different size fractions(20 μm) of the detrital sediments and the results showed that the detrital sediments mainly originate from the Philippine *** EMI and EM2 are transported to the Bicol Shelf mainly by surface and bottom currents from the islands,and component EM3 is delivered by gravity flow from the exposed shelf during low sea-level *** content of the total detrital fraction and the three end-members,as well as the mass accumulation rates(MARs) of the coarse detritus(EM2 and EM3),were considerably higher during glacial periods(40-14 ka and 150-130 ka) than during other intervals;the glacials corresponded to a low sea level,while the MAR of the fine detritus(EMI) did not increase remarkably during 40-14 *** therefore concluded that the input of coarse detritus to the Bicol Shelf from the islands was mainly controlled by sea-level *** of the input of fine-grained detritus(EM1) was influenced not only by sea level but also by ocean currents and regional ***,our results help understand "source-to-sink" processes in the western Pacific marginal seas and their response to global change.

关键词： Bicol Shelf late Pleistocene grain size sea level change

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Low-temperature processed solar cells with formamidinium tin halide perovskite/fullerene heterojunctions

引用

Nano Research 2016年第6期9卷 1570-1577页

作者： Meng Zhang Miaoqiang Lyu Jung-Ho Yun MahirNoori xiaojing zhou Nathan A. Cooling Qiong Wang Hua Yu Paul C. Dastoor Lianzhou Wang Nanomaterials Centre School of Chemical Engineering and AIBN The University of Queensland St Lucia Brisbane QLD 4072 Australia Centre for Organic Electronics University of Newcastle Callaghan NSW 2308 Australia

A new type of lead-free, formamidinium （FA）-based halide perovskites, FASnf2Br, are investigated as light-harvesting materials for low-temperature processed p-i-n heterojunction solar cells with different configurations. The FASnlaBr perovskite, with a band-gap of 1.68 eV, exhibits optimal photovoltaic performance after low-temperature annealing at 75 ~C. By using C60 as electron-transport layer, the device yields a hysteresis-less power conversion efficiency of 1.72%. The possible use of an inorganic MoO~ film as a new type of independent hole-transport layer for the present tin-based perovskite solar cells is also demonstrated.

关键词： lead-free perovskite perovskite solar cells low-temperature process fullerene molybdenum oxide

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diversity characterization and association analysis of agronomic traits in a Chinese peanut (Arachis hypogaea L.) mini-core collection

引用

Journal of Integrative Plant Biology 2014年第2期56卷 159-169页

作者： Huifang Jiang Li Huang Xiaoping Ren Yuning Chen xiaojing zhou Youlin Xia Jiaquan Huang Yong Lei Liying Yan Liyun Wan Boshou Liao Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences Nanchong Academy of Agricultural Sciences

Association mapping is a powerful approach for exploring the molecular basis of phenotypic variations in plants. A peanut （Arachis hypogaea L.） mini-core collection in China comprising 298 accessions was genotyped using lo9 simple sequence repeat （SSR） markers, which identified 554 SSR alleles and phenotyped for 15 agronomic traits in three different environments, exhibiting abundant genetic and phenotypic diversity within the panel. A model-based structure analysis assigned all accessions to three groups. Most of the accessions had the relative kinship of less than o.05, indicating that there were no or weak relationships between accessions of the mini- core collection. For 15 agronomic traits in the peanut panel, generally the Q ＋ K model exhibited the best performance to eliminate the false associated positives compared to the Q model and the general linear model-simple model. In total, 89 SSR alleles were identified to be associated with 15 agronomic traits of three environments by the Q＋K model-based association analysis. Of these, eight alleles were repeatedly detected in two or three environments, and 15 alleles were commonly detected to be associated with multiple agronomic traits. Simple sequence repeat allelic effects confirmed significant differences between different genotypes of these repeatedly detected markers. Our results demonstrate the great potential of integrating the association analysis and marker-assisted breeding by utilizing the peanut mini-core collection.

关键词： Arachis hypogaea L. association analysis mini-corecollection peanut

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Safe conservation and utilization of peanut germplasm resources in the Oil Crops Middle-term Genebank of China

引用

Oil Crop Science 2022年第1期7卷 9-13页

作者： xiaojing zhou Xiaoping Ren Huaiyong Luo Li Huang Nian Liu Weigang Chen Yong Lei Boshou Liao Huifang Jiang Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural AffairsOil Crops Research Institute of the Chinese Academy of Agricultural SciencesWuhanChina

Peanut(Arachis hypogaea L.)is an important oil and cash crop in the *** germplasm collected in China are abundant,which provides important material guarantee for peanut breeding and industrial ***,the safe conservation technology and indicators of peanut germplasm resources in the Oil Crops Middleterm Genebank of China were expounded from three processes of storage,monitoring,reproduction and *** summarized and reviewed the situation of conservation and utilization of peanut germplasm resources in the Middle-term Genebank in the past 20 *** future research direction of peanut resources in the Oil Crops Middle-term Genebank of China is prospected.

关键词： Peanut germplasm resources Middle-term genebank Safe conservation Effective utilization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：