检索结果-南通市图书馆

Effect of global warming on the distribution of Lucifer intermedius and ***(Decapoda) in the Changjiang estuary

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2009年第10期19卷 1389-1395页

作者： Zengling Ma,Zhaoli Xu,Jin Zhou Key and Open Laboratory of Marine and Estuary Fisheries,Ministry of Agriculture of china,East china Sea Fisheries Research institute,Chinese Academy of Fisheries Sciences,Shanghai 200090,{3. Key and Open Laboratory of Marine and Estuary Fisheries Ministry of Agriculture of China East China Sea Fisheries Research Institute Chinese Academy of Fisheries Sciences Shanghai 200090 China

We conducted an oceanographic censusin 1959,2002,and 2005 to evaluate changes in the temporo-spatial distribution and abundance of Lucifer intermedius and *** in the Changjiang *** general,the abundance and frequency of occurrence(OF) for these two species were highest during the *** measured a significant change in the abundance and OF between *** abundance and OF of *** increased from 3.7 individuals m 3.and 66.67%,respectively,in 1959,to 8.93.individuals m 3.and 85.19%,in *** 1959,*** was only found during the summer(abundance:0.01 individuals m 3.OF:3.70%).However,in 2002,this species was collected during all seasons except the ***,abundance(0.47 individuals m 3. and OF(25.93.) were higher in 2002 than in *** increases in abundance and OF were measured during cruises during the spring of *** hypothesize that global warmingis responsible for theincrease *** *** thenorthward *** Changjiang *** our results,monitoring of both species may be useful to evaluate the effects of climate change.

关键词： Zooplankton Lucifer intermedius Lucifer hanseni Global warming Changjiang estuary

Lower Boundary of the Marine Pleistocene in Northern Shelf of the South china Sea

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1991年第4期65卷 427-439,460页

作者： Wang Pinxian Xia Lunyu Wang Lujiang Cheng Xinrong Department of Marine Geology, Tongji University, Shanghai 200092,china Research institute, Nanhai West Oil Corporation, Zhanjiang, Guangdong 524057, china 1 1) Department of Marine Geology Tongji University Shanghai 200092 China 2 2) Research institute Nanhai West Oil Corporation Zhanjiang Guangdong 524057 China

A marine stratigraphic sequence across the Pliocene / Pleistocene boundary has been found in the north-ern continental shelf of the South china Sea. The marine Quaternary deposits in the Yinggehai Basin may ex-ceed 2,000 m in thickness, probably providing the best section for studying the lower boundary of the marinePleistocene in South china. The vertical succession with planktonic foraminifers and nannofossils revealed inboreholes in the basin has been well correlated with that in the international stratotype section of thePliocene / Pleistocene boundary at Vrica, Italy, resulting in the acquirement of a biostratigraphic boundary at1.64 Ma. This boundary, however, does not coincide with any prominent lithological palaeoenvironmentalchanges in the study area and can hardly be used in geological practice. There are, in contrast, significantchanges at the level of LAD of Globorotalia multicamerata sensu lato located below the above-mentionedboundary. The percentage of planktonic foraminifers in the total population and preservation of foraminiferaltests display great changes at this level corresponding to a clear onlap on the seismic profiles and indicating adepositional hiatus at ca. 2.0-2.5 Ma. Since the level can be widely traced in the Pearl River Mouth Basin andthe Beibu Gulf Basin and well corresponds with the marked depositional environmental changes recorded inthe west Pacific and other regions, it is recommended that the Plio / Pleistocene boundary be drawn at the levelof Gr. multicamerata sensu lato LAD, roughly concurrent with the Gauss / Matuyama turn.

关键词： Lower Boundary of the Marine Pleistocene in Northern Shelf of the South china Sea

辽河盆地东部凹陷北段古近系层序地层特征及油气藏分布

在线全文

学校读者我要写书评

暂无评论

石油大学学报：自然科学版 2004年第5期28卷 1-5,12页

作者：李潍莲孙红军唐文连石油大学石油天然气成藏机理重点实验室中国石化石油勘探开发研究院北京100083

利用地震、测井、录井等资料,对辽河盆地东部凹陷北段古近系进行了层序地层学分析,并对每个层序的发育特征、生储盖组合及油气藏类型进行了详细研究。结果表明,该区古近系可划分为SⅠ,SⅡ,SⅢ和SⅣ4个层序,分别对应于房身泡组、沙三段... 详细信息

利用地震、测井、录井等资料,对辽河盆地东部凹陷北段古近系进行了层序地层学分析,并对每个层序的发育特征、生储盖组合及油气藏类型进行了详细研究。结果表明,该区古近系可划分为SⅠ,SⅡ,SⅢ和SⅣ4个层序,分别对应于房身泡组、沙三段、沙一段沙二段和东营组。SⅡ层序水进体系域最大湖泛期沉积的半深湖深湖相暗色泥岩是研究区的主力烃源岩系;SⅢ层序水进体系域最大湖泛面附近的浅湖相泥岩是最重要的区域盖层。良好的生储盖配置使SⅡ层序、SⅢ层序水进体系域的扇三角洲、滩坝及浊积扇砂体成为本区最佳勘探目标层。SⅡ层序高位体系域生储条件配置好,又有SⅢ层序区域盖层的整体封盖,油气聚集受局部盖层直接控制,可成为较有利的勘探目的层。SⅡ层序、SⅢ层序低位体系域的冲积扇、辫状河砂体体积规模较小,难以形成大油气藏。

关键词：层序地层体系域东部凹陷盖层古近系辽河盆地砂体油气藏分布湖相泥岩录井

EFFICIENT POLYMER PHOTOVOLTAIC DEVICES BASED ON POLYMER D-A BLENDS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2001年第6期19卷 597-602页

作者： Xian-yu Deng Li-ping Zheng Yue-qi Mo Gang Yu Wei Yang Wen-hua Weng Yong Cao institute of Polymer Optoelectronic Material and Devices, South china University of Technology Wuhan 43.074, china 华南理工大学广东广州

Recent work demonstrated that efficient solar-energy conversion could be achieved in polymer photovoltaic cells (PVCs) based on interpenetrating bi-continuous networks([1,2]). In this paper we present a comprehensive study on improving energy conversion efficiencies of PVCs based on composite films of MEBPPV and fullerene derivatives. Carrier collection efficiency of ca. 3.% el/ph and energy conversion efficiency of 3.9% were achieved at 500 nm. At reverse bias of 15 V, the photosensitivity reached 0.8 A/W, corresponding to a quantum efficiency over 100% el/ph. These results suggest that high efficiency photoelectric conversion can be achieved in polymer devices with M-P-M structure. These devices are promising for practical applications such as plastic solar cells and plastic photodetectors.

关键词： photovoltaic cell hetero-junction conjugated polymer fullerene

Cytokines Expression in Lymphocytes From Rats With Allergic Asthma Induced by Pleurotus sapidus besidiospores

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 1998年第2期11卷 115-124页

作者： CHEN WEI LI DIAN-DONG PIAO WEN-HUA LANG WEN-FANG AND CAI NIAN-SHENG(institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, beijing 100050, china institute of Occupational Medicine, Chinese Academy of Pr institute of Medicinal Biotechnology Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China Department of Oncology Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences Tiantan Beijing 100050 China institute of Occupational Medicine Chinese Academy of Preventive Medicine Beijing 100050 China

Allergic asthma caused by mushroom spores (Pleurotus sapidus besidiospores) is a common health problem among mushroom-cultivating workers in china. An animal model of allergic asthma through the challenge of Pleurotus sapidus besidiospores in primed rats was developed for investigating the role of cytokines in the pathogenesis of the disease. In the study a series of related cytokines and their receptors, including their activity and mRNA levels of spleen lymphocytes isolated from asthmatic rats, were measured. Determined by 3.-TdR incorporation assay and NAG microcolorimetric assay, Con A-induced spleen lymphocyte proliferation and IL-2 activity in culture supernatants of spleen lymphocytes from 7-day challengedrats with allergic asthma increased significantly by 261% and 208%, respectively, as compared with those in the control. Cytokines and their receptor expression at mRNA levels were determined by RNA/cDNA hybridization, using (α-3.P-dCTP radiolabeled cDNA probes for different cytokines and their receptors in vitro. The results showed that mRNA expression of IL-4, GM-CSF, IL-6, IL-2 and IL-2R, except IL-6R, in lymphocytes of 7-day-challenged asthma-suffering rats, increased significantly by 54%, 45%, 170%, 83. and 76%, respectively. In 2-day challenged-rats, mRNA levels of IL-4, IL-6 and IL-2 increased by 3.%,58% and 125%, respectively, whereas mRNA leve1s of GM-CSF, IL-2R and IL-6R remained unchanged. Thus, the experimental results suggested a significant increase in TH2type cytokines in the pathogenesis of Pleurotus sapidus besidiospore-induced allergic asthma and IL-4 may play an essential role.

关键词： CSF GM Cytokines Expression in Lymphocytes From Rats With Allergic Asthma Induced by Pleurotus sapidus besidiospores

Relations among the category of topological molecular lattices and certain related categories

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第8期42卷 636-640页

作者： WANG Guojun and LI Yongming1. institute of Mathematics, Shaanxi Normal University, Xi’an 710062, china 2. Department of Basic Science, Northwestern institute of Architecture Engineering, Xi’an 710061, china institute of Mathematics Shaanxi Normal University Xi’an China Department of Basic Science Northwestern Institute of Architecture Engineering Xi’an China

TAKING the theory of fuzzy topology and point set topology as background,the theory of topo-logical molecular lattices was first advanced in 1979,and after several generalizationsrefs.[4,5] are its general *** topology and point set topology are both special casesof topological molecular lattices as pointed out in ref.[4],whereas it seems not clear whetherone can develop the theory of topological molecular lattices by means of methods in

关键词： category pick-up-one principle.

Synthesis and Structure of the Copper(I) Complex Containing Bis(diphenylphosphino)ethane

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2002年第1期21卷 51-54页

作者： LIN Kun-Hua1,2 XIE Qing1 YANG Rui-Na1② XING Li-Ping1 JIN Dou-Man3.(1Henan institute of Chemistry, Zhengzhou 450002, china) (2Zhengzhou University, Zhengzhou 450006, china) (3.tate Key Laboratory of Coordination Chemistry, Nanjing University 210093. Chin Henan institute of Chemistry Zhengzhou 450002 配位化学国家重点实验室配位化学国家重点实验室 Nanjing 210093

The mononuclear copper(I) complex, [Cu(dppe)2](PF6)(CH3.OCH3. [dppe = bis-(diphenylphosphino)ethane] has been synthesized and characterized by X-ray crystallography. The crystal belongs to monoclinic, Mr=1062.3. space group P21/n with cell parameters a =14.741(2), b =19.3.4(8), c =18.587(3. ? = 91.41(1)°, V = 53.1.5 3. Z = 4, Dc=1.3.2 g/cm3. F(000)= 2200, = 6.16cm-1, R=0.062, Rw = 0.068. A total of 9679 independent reflections were collected, of which 4574 reflections with I >3.(I) were observed. The central Cu atom is coordinated by four P atoms from dppe to form a distorted tetrahedral environment. In the coordination sphere the bond lengths of CuP(1), CuP(2), CuP(3. and CuP(4) are 2.298(2), 2.3.5(2), 2.3.1(2) and 2.295? respectively; and the PCuP bond angles vary from 87.52(9) to 120.12(9)?

关键词： copper complex crystal structure synthesis

Application of the Embedded-atom Method to Liquid Binary Cu-Ni Alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 1997年第2期13卷 117-122页

作者： Hongbo LIU Kuiying CHEN Zhuangqi HU (State Key Lab. of RSA, institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, china)Geying AN(School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, china) State Key Lab. of RSA Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

A simple analytic embedded-atom model of monoatoms that includes more than nearest neighbours has been extended to study properties of binary liquid Cu-Ni alloys, here the two-body potential between different species of atoms is taken as a function of the two-body potential for the pure metals with a unique form which yields alloy models with the same invariance to electron density transformations as monoatomic models. Faber-Ziman structure factors have been computed by molecular dynamics simulation on the base of this model. The results are in good agreement with experimental data given by Waseda, thus supporting the overall validity of the approach, especially for cross potential of Cu-Ni pair. Further, a detailed description of structure of binary liquid Cu-Ni alloys with different compositions have been performed using pair analysis and bond orientational order method etc., and then the chemical short range order has also been examined to reveal the structural characterization.

关键词： Rev Li Application of the Embedded-atom Method to Liquid Binary Cu-Ni Alloys Cu Ni

Rapid Climatic Change during Past 60 ka Recorded in NE Indian Ocean and Its Correspondence from South china Land

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2000年第3期19卷 58-64页

作者： Fang Nianqiao Chen Xuefang Hu Chaoyong Yin Yong Ding Xuan Zhang Shihong Nie Haogang institute of Marine Geology and Geophysics, china University of Geosciences, beijing 100083. china

According to the marine records from the Bay of Bengal, northeastern Indian Ocean, and the continental records from the South china, the authors make a detailed discussion in this paper about the correlation between them and their implication of rapid climatic change. The marine records show its good response to the high latitudes both for cold events and for warm ones while the continental records mainly mirror those cold Heinrich events corresponding to the North Atlantic but bear strongly a local color in reflecting warm events. The authors assume that the heat transmission style may cause the unbalanced coupling relationship.

关键词： rapid climatic change northeastern Indian Ocean South china Land tele connection.