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Laser probe ^(40)Ar/^(3.)Ar dating of mica on the deformed rocks from Altyn Fault and its tectonic implications,western china

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Chinese Science Bulletin 2001年第4期46卷 322-325页

作者： LIU Yongjiang, YE Huiwen, GE Xiaohong, CHEN Wen, LIU Junlai, REN Shoumai & PAN HongxunCollege of earth sciences, changchun {3. of Science and Technology, changchun 130061, china Graduate School, china {3. of Geosciences, Beijing 100083. china Laboratory of Isotopic Geochronology, Institute of Geology, Ministry of Land and Resources of china, Beijing 10003., china College of earth sciences Changchun University of Science and Technology Changchun China Graduate School China University of Geosciences Beijing China Laboratory of Isotopic Geochronology Institute of Geology Ministry of Land and Resources of China Beijing China

The samples of Caledonian mylonitized granite and Jurassic meta-sedimentary rocks were collected in the north of Dangjinshan Pass, Qaidam gate fault-valley and Gesi fault-valley. Detailed studies under the microscope and electronic microscope suggest that all the samples contain the syntectonic-growing minerals such as white mica, chlorite, sericite, biotite, etc. By dating these minerals, we got a group of 40Ar/3.Ar laser probe isochronal ages of 89-92 Ma and apparent ages of (46.6±6.4) Ma. The ages ranging from 97 to 46 Ma were reported for the first time in the isotopic dating researches of the Altyn Fault The isochronal age group of (98-89) Ma indicates that a ductile strike-slip event, with low-grade metamorphism, began in late Cretaceous. This suggests that the strike-slip movement of the Altyn Fault should be related to the formation of the so-called west tectonic syntaxis in the Nepal-western Kunlun area.

关键词： Altyn Fault 40Ar/3.Ar age strike-slip movement.

Decoding the inconsistency of six cropland maps in china

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The Crop Journal 2024年第1期12卷 281-294页

作者： Yifeng Cui Ronggao Liu Zhichao Li Chao Zhang Xiao-Peng Song jilin Yang Le Yu Mengxi Chen Jinwei Dong Institute of Geographic sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China university of Chinese Academy of sciences Beijing 100049China department of Geographical sciences University of MarylandCollege ParkMD 20740USA College of Grassland Science and Technology China Agricultural UniversityBeijing 100193China Ministry of Education Ecological Field Station for East Asian Migratory Birds Department of Earth System ScienceInstitute for Global Change StudiesTsinghua UniversityBeijing 100084China Ministry of Education Ecological Field Station for East Asian Migratory Birds Beijing 100084China Tsinghua university(department of earth System Science)-Xi’an Institute of Surveying and Mapping Joint Research Center for Next-Generation Smart Mapping Beijing 100084China Institute of Remote Sensing and Geographic Information System Peking UniversityBeijing 100871China department of Forest and Conservation sciences University of British ColumbiaVancouverBCV6T 1Z4Canada

Accurate cropland information is critical for agricultural planning and production,especially in foodstressed countries like *** widely used medium-to-high-resolution satellite-based cropland maps have been developed from various remotely sensed data sources over the past few decades,considerable discrepancies exist among these products both in total area and in spatial distribution of croplands,impeding further applications of these *** factors influencing their inconsistency are also *** this study,we evaluated the consistency and accuracy of six cropland maps widely used in china in circa 2020,including three state-of-the-art 10-m products(i.e.,Google Dynamic World,ESRI Land Cover,and ESA WorldCover)and three 3.-m ones(i.e.,GLC_FCS3.,GlobeLand 3.,and CLCD).We also investigated the effects of landscape fragmentation,climate,and agricultural *** using a ground-truth sample revealed that the 10-m-resolution WorldCover provided the highest accuracy(92.3.).These maps collectively overestimated Chinese cropland area by up to 56%.Up to 3.%of the land showed spatial inconsistency among the maps,concentrated mainly in mountainous regions and attributed to the varying accuracy of cropland maps,cropland fragmentation and management practices such as *** work shed light on the promotion of future cropland mapping efforts,especially in highly inconsistent regions.

关键词： Consistency and accuracy 10-and 3. m Cropland mapping Agricultural management china

Effect of monotoxicity and mixtoxicity of nitroaromatics to the green algae, Scienedesmus obliquus

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Journal of Environmental sciences 2000年第3期12卷 367-368页

作者： LIU Jing\|ling, LANG Pei\|zheng (department of Environmental sciences, Northeast Normal university, {3. 13.024, china) 西北师范大学甘肃长春 1 3 0 0 2

In general, many pollutants co\|exist in natural aquatic ecosystems. They affect each other and occur different results, such as synergism, addition and antagonism. So the research at mixtoxicity of contaminants to aquatic organism is more important than monotoxicity. In this paper, 50% effectual inhibition concentration 48h \%EC\%\-\{50\} values of 6 kinds of nitroaromatic compounds to the green algae, \%Scenedesmus obliquus,\% were investigated. Mixtoxic experiments, in which any combination of 2,4\|DNT and other 6 kinds of compounds, indicate: (1) synergisms between 2,4\|DNT and 4\|NAn, as well as 4\|NAnis, 1,4\|DNB; (2) antagonisms between 2,4\|DNT and 4\|NT, as well as 4\|NPh, 4\|NCB.

关键词： monotoxicity mixtoxicity nitroaromatics green algae

Eclogites in the interior of the Tibetan Plateau and their geodynamic implications

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Chinese Science Bulletin 2009年第15期54卷 2556-2567页

作者： ZHANG KaiJun1,2 & TANG XianChun2,3.1 department of earth sciences, Nanjing {3., Nanjing 210093. china 2 Guangzhou Institute of Geochemistry, Chinese Academy of sciences, Guangzhou 510640, china 3.Graduate {3. of Chinese Academy of sciences, Beijing 100049, china department of earth sciences Nanjing University Nanjing China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Graduate university of Chinese Academy of sciences Beijing China

Eclogites have been recently reported in the interior of the Tibetan Plateau, including in the central Qiangtang metamorphic belt, in the Basu metamorphic massif of the eastern Bangong-Nujiang suture zone, and at Songdo and Pengco in the eastern Lhasa terrane. Some typical ultrahigh-pressure (UHP) metamorphic phenomena, e.g., garnet exsolution from clinopyroxene, were documented in the Basu and Pengco eclogites. The UHP metamorphism in the interior of the Tibetan Plateau marked by these eclogites generally took place in the Early Mesozoic. Along with exhumation of these eclogites, (post-) collision-related magmatism extensively occurred around the central Qiangtang belt, the eastern Ban-gong-Nujiang suture zone, and the eastern Lhasa terrane. The occurrence of these Early Mesozoic ec-logites manifests an out-of-sequence evolution of the Tethys, and they could be a product of diachro-nous collision between the eastern Qiangtang terrane and the irregular continental margin of the united western Qiangtang-Lhasa plate, along the linked eastern Bangong-Nujiang-central Qiangtang zone. The collision-related magmatic rocks could have been originated from lithospheric thickening, melting, or detachment due to the collision. The presence of UHP metamorphic rocks in central Qiangtang and Basu implies likely continental deep-subduction, and the denudation of these two metamorphic zones could have served as the source of the Triassic turbidites in the Songpan-Garzê complex and the Ju-rassic turbidites in the western Bangong-Nujiang zone, respectively. However, studies of the eclogites in the interior of the Tibetan Plateau just began, and many principal aspects still remain to be explored, such as their distributions, typical lithologies and minerals, temperature-pressure conditions, timing of formation and exhumation, protoliths and tectonic setting, and relationship with the evolution of the Tethys and large-scale basins in Tibet.

关键词：地球动力学意义青藏高原榴辉岩

QUASI PERIODIC SOLUTIONS OF NEUTRAL VOLTERRA INTEGRAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAY

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Chinese Annals of Mathematics,Series B 1991年第2期12卷 157-163页

作者：王克 department of Mathematics Northeast Normal UniversityChangchunJilinChina

This paper deals with the uniqueness,existence and non-existence of quasi periodicsolutions of neutral Volterra integral differential equations of the form(1)and(2)Some new unique existence criteria and non-existence ... 详细信息

关键词： uniqueness Volterra neutral deals quasi normed implies 钟邵 milar holds

Surface effects of monolayer-protected gold nanoparticles on the redox reactions between ferricyanide and thiosulfate

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Science china Chemistry 2005年第5期48卷 424-430页

作者： LI Di1, SUN Chunyan1, HUANG Yunjie1, LI Jinghong1,2 & CHEN Shaowei3.1. State Key Laboratory of Electroanalytical Chemistry, changchun Institute of Applied Chemistry, Chinese Academy of sciences, changchun 13.022, {3. 2. department of Chemistry, Tsinghua university, Beijing 100084, {3. 3. department of Chemistry, university of California, Santa Cruz, Santa Cruz, CA 95064, USA State Key Laboratory of Electroanalytical Chemistry changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China department of Chemistry Tsinghua University Beijing China department of Chemistry University of California Santa Cruz Santa Cruz USA

Electron transfer through the self-assembled monolayers (SAMs) on gold nanopar-ticles is investigated by using the monolayer protected gold nanoclusters (MPCs) as elec-tron-transfer mediators. 3.Mercaptopropionic acid (MPA) and 11-meraptoundecanoic acid (MUA) MPCs were employed to catalyze the redox reaction between potassium ferricyanide and sodium thiosulfate. The catalytic mechanism was proposed that the MPCs act as diffusing elec-tron-mediators and electron transfers to and from the MPCs surface. Therefore the electron transfer rate through the capping layers would be proportional to the MPCs catalyzed reaction rate, which was monitored by the UV absorbance of ferricyanide. The calculated apparent rate constant was orders of magnitude smaller than that of the maximum of tunneling current, which was attributed to the splited energy level of the nanoscale particles.

关键词： electron transfer, three-dimensional self-assembled monolayers, redox reaction, electron transfer mediator, surface effect.

Study Progress and Trends of Strategic Environmental Assessment in china

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Chinese Journal of Population,Resources and Environment 2009年第2期7卷 76-82页

作者： Cai Chunmiao1,2, 3. Shang Jincheng4 1. Northeast Institute of Geography and Agroecology, Chinese Academy of sciences, changchun jilin 13.012, {3. 2. department of Geography, Harbin university, Harbin Heilongjiang 150086, {3. 3. Graduate School of Chinese Academy of sciences, Beijing 10003., {3. 4. College of Urban and Environmental Science, Northeast Normal university, changchun jilin 13.024, {3. Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun Jilin 130012 China department of Geography Harbin University Harbin Heilongjiang 150086 China Graduate School of chinese Academy of sciences Beijing 100039 China College of Urban and Environmental Science Northeast Normal University Changchun Jilin 130024 China

Strategic environmental assessment (SEA) in china has developed rapidly since it was introduced into china in the 1990s. Chinese government promulgated the Environmental Impact Assessment Law of china (hereinafter referred to as the EIA Law) in 2002. In this law, it is stipulated clearly that regional and sector plans should be assessed. Through investigating materials and analyzing literatures, this article analyses the practical and academic study achievements of SEA in china that have been achieved since the EIA Law was implemented, probes into the current situation of the main level of SEA in china-plan EIA, then summarizes the development characteristics, and eventually, puts forward the development trends of SEA in china. The research conclusions can offer the foundations for comprehending systematically the progress of SEA in china.

关键词： strategic environmental assessment plan environmental impact assessment china study progress characteristics development trends

Safe and Objective Assay of Enterovirus 71 Neutralizing Antibodies via Pseudovirus

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Chemical Research in Chinese Universities 2012年第1期28卷 91-95页

作者： JIN Jun1, XU Lin1, GUO Shi-jie2, SUN Shi-yang1, ZHANG Shu1, ZHU Chang-lin3. KONG Wei1 and JIANG Chun-lai1 1. National Engineering Laboratory for AIDS Vaccine, College of Life Science, jilin university, changchun 13.012, P. R. china 2. {3. of Pediatrics, the First Hospital of jilin university, changchun 13.021, P. R. china 3. changchun Baike Biotechnology Co., changchun 13.012, P. R. china National Engineering Laboratory for AIDS Vaccine College of Life Science Jilin University Changchun 130012 department of Pediatrics the First Hospital of Jilin University Changchun 130021 changchun Baike Biotechnology Co. Changchun 130012

Current serum neutralization assays based on the inhibition of the cytopathic effect（Nt-CPE） need to ma nipulate live viruses, which are time-consuming, labor-intensive, and have the potential exposure to infectious agents, so a safe and objective assay via pseudovirus for the fast and efficient detection of enterovirus 71（EV71） neutralizing antibodies was developed. First, we generated EV71 pseudovirus containing firefly luciferase gene in place of the capsid gene P1 in EV71 genome. Vero cells infected with 200 CCID50（50% cell culture infective dose） of EV71 pseudovirus for 24 h were found to have the best performance. Seval sera were measured by EV71 pseudoparticle neutralization assay（Nt-PPN） and the conventional serological method Nt-CPE. Neutralizing antibody titers measured by Nt-PPN and those obtained by Nt-CPE demonstrate a high correlation between the two methods. Overall, the PPN assay represents a valid alternative to conventional serological methods for the evaluation of EV71 neutralizing anti bodies. This method can be used for detecting neutralizing antibodies of other picornaviruses, such as hepatitis A vi rus（HAV） and coxsackievirus 16（CVA16）, and make it possible to determine whether there is cross-reactivity be tween EV71 and CVA16.

关键词： Enterovirus 71(EV71) Pseudovirus Luciferase Neutralizing antibody assay

Existence of Solutions for Nonlinear Boundary Value Problems of Impulsive Differential Equations

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Acta Mathematica Sinica,English Series 1997年第4期13卷 503-508页

作者： Dong Yujun department of Mathematics, jilin university, changchun 13.023. {3. 吉林大学数学系吉林长春

With the help of the coincidence degree continuation theorem, we generalize to the case of impulsive systems of the second order some existence results obtained by Gaines and Mawhin in the ordinary case. In particular. for the impulsive functions the treatment does not assume any mono- tonicity conditions. which are necessary in earlier papers treated by *** and ***, *** and *** with other methods.

关键词： Impulsive differential systems Coincidence degree continuation theorem Autonomous curvature bound set Existence of solutions