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chinese Science Bulletin 1999年第S2期44卷 90-91页

作者： sun chengxing~1,{1., dai fusheng~2 and luo yi~2 1. state key laboratory of environmental geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china 2. Department of Geology, Kunming University of Science and Technology, Kunming 650093, china state {1. laboratory of environmental geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Department of Geology Kunming University of Science and Technology Kunming 650093 China

SINCE the first discovery of lateritic gold deposit which is easier to mining and dressing at Boddington inWestern Australia at the beginning of the 1.80s, geologists have paid much attention to it, and it wasfound in tropical and subtropical regions. However, recently the metallogenetic mechanism has notbeen understood very well. In this note we reported some research results on the enrichment mechanism ofgold during the process of lateritization in the case of three lateritic profiles with some degree of gold enrichment located in southern area of the Yuanmou ancient landmass, Yunnan Province. The parent rocks of the investigated profiles （about 5-8 m thick） is metamorphic schist, in whichmean content of gold is 1..3×1.-9. Samples were collected from two pits at Xujie （Mouding County）and an outcrop of gully at Menglingou （Yuanmou County）, dried in air and ground in agate mortar to

关键词： gold enrichment lateritizafion Yunnan.

The first finding of superhigh concentration of REE-rich bed in carbonate rock weathering crusts and its siginificance

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chinese Science Bulletin 1999年第S2期44卷 104-106页

作者： JI Hongbing, wang shijie, ZHOU Dequan, OUYANG Ziyuan and sun chengxing state key laboratory of environmental geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china state {1. laboratory of environmental geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE Pingba soil profile developed on the bedrock Triassic dolomitite and morphologically located in uplandin karst terrain in Central Guizhou, china was proven to be in-situ dolomitite weathering pedogeneticproduct. Continuous sampling method was used for taking samples from man-made excavated pit fromthe Pingba profile. REE for samples was measured on ELEMENT ICP-MS in the{1., CAS. The standard reference samples GSR-6 and GSS-1.4,7 were used to monitor the precisionof REE measurement. The measurement error was less than ≤1.%. For PB-T1.sample, the coefficientof variation (CV) of three analytical run precision is: La, Ce, Pr, Nd, Ho, Er≤1.%; Sm, Eu, Dy,Tm≤1.%; Y, Lu, Gd, Tb≤20%.

关键词： superhigh REE concentration weathering crust carbonate rock.

Surface Coating Enabling Sulfide Solid Electrolytes with Excellent Air Stability and Lithium Compatibility

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Energy & environmental Materials 2024年第6期7卷 41-49页

作者： Min luo Changhong {1. yi Duan Xuyang Zhao Jiantao {1. Xueliang sun National Power Battery Innovation Center GRINM Group Corporation LimitedBeijing 100088China china Automotive Battery Research {1. Co. Ltd.Beijing 100088China General Research Institute for Nonferrous MetalsBeijing 100088China Eastern institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China

All-solid-state lithium metal batteries(ASSLMBs)featuring sulfide solid electrolytes(SEs)are recognized as the most promising next-generation energy storage technology because of their exceptional safety and much-improved energy ***,lithium dendrite growth in sulfide SEs and their poor air stability have posed significant obstacles to the advancement of sulfide-based ***,a thin layer(approximately 5 nm)of g-C_(3)N_(4)is coated on the surface of a sulfide SE(Li_(6)PS_(5)Cl),which not only lowers the electronic conductivity of Li_(6)PS_(5)Cl but also achieves remarkable interface stability by facilitating the in situ formation of ion-conductive Li3N at the Li/Li_(6)PS_(5)Cl ***,the g-C_(3)N_(4)coating on the surface can substantially reduce the formation of H_(2)S when Li_(6)PS_(5)Cl is exposed to humid *** a result,Li-Li symmetrical cells using g-C_(3)N_(4)-coated Li_(6)PS_(5)Cl stably cycle for 1.00 h with a current density of 0.2 mA cm^(-2).ASSLMBs paired with LiNbO_(3)-coated LiNi_(0.6)Mn_(0.2)Co_(0.2)O_(2)exhibit a capacity of 1.2.8 mAh g^(-1.at 0.1.C and a high-capacity retention of 99.1.after 200 ***,g-C_(3)N_(4)-coated Li_(6)PS_(5)Cl effectively mitigates the self-discharge behavior observed in *** surface-coating approach for sulfide solid electrolytes opens the door to the practical implementation of sulfide-based ASSLMBs.

关键词： anode interface g-C_(3)N_(4)coating Li_(6)PS_(5)Cl lithium dendrite inhibition solidstate lithium metal batteries

The role of reservoir mediums in natural oil cracking:Preliminary experimental results in a confined system

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chinese Science Bulletin 2010年第33期55卷 3787-3793页

作者： XIAO QiLin1,2,sun YongGe1,3 & ZHANG YongDong1,2 1 state key laboratory of Organic geochemistry,Guangzhou institute of geochemistry,chinese academy of sciences,Guangzhou 510640,china 2 Graduate Schools,chinese academy of sciences,Beijing 100049,china 3 institute of environmental and Biogeochemistry(eBig),Zhejiang University,Hangzhou 310027,china state {1. laboratory of Organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Graduate Schools Chinese Academy of Sciences Beijing China institute of {1. and Biogeochemistry (eBig) Zhejiang University Hangzhou China

Large amounts of data regarding the influence of temperature and pressure on the thermal stability of crude oil have been pub-lished;however,the role of reservoir mediums has received little *** involving oil cracking in the presence of montmorillonite,illite,calcite,quartz and water were conducted in closed gold tubes to investigate the effects of these reservoir mediums on oil *** was done by screening variations in the chemical and stable carbon isotopic components of nC1.+ and gasoline-range hydrocarbons(nC8-)present in various *** indicated that reservoir mediums have an active role in oil cracking under experimental *** concentrations of nC1.+ in the cracked residues progressively decreased in systems containing oil+water+illite,oil+water+montmorillonite,oil+water,oil+water+quartz and oil+water+*** comparison with the system containing oil+water,our results indicated a retardation effect for oil cracking in systems in the presence of illite and montmorillonite,and an acceleration effect on oil destruction in systems in the presence of calcite and ***1.+ became increasingly depleted in 1.C in systems with oil+water+illite,oil+water+calcite,oil+water+montmorillonite,oil+water+ quartz and oil+*** obvious correlation was observed between concentrations and stable carbon isotopic components of nC6-nC8 and nC1.+ in the individual *** discrepancies in chemical and stable carbon isotopic components of nC6-nC8 and nC1.+ in the pyrolyzed residues highlighted the important role of reservoir mediums to control carbon-carbon cleavage of nC1.+ and then the isomerization,cyclolization and aromatization reactions;as well as governing the occurrence and thermal destruction of nC6-nC8 under experimental *** research may have critical implications in reconstructing chemical kinetic models for natural oil cracking.

关键词：裂解作用实验条件密闭系统原油裂解水库介质天然同位素组成

Distribution of molluscan remains in the sediment of the Chukchi Sea and its vicinity, the Arctic

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Acta Oceanologica Sinica 2003年第4期22卷 607-619页

作者： Gao Aiguo 1,2, Xu Fengshan3, sun Haiqing 1,2, Li Lon1 1. First institute of Oceanography, state Oceanic Administration, Qingdao 266061,china. 2. key laboratory of Marine Sedimentology and environmental Geology, state Oceanic Administration, Qingdao 266061,china 3. institute of Oceanology, chinese academy of sciences, Qingdao 266071,china First institute of Oceanography State Oceanic Administration Qingdao 266061 China institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China key Lab. Mar. Sedimentol./Environ. State Oceanic Administration Qingdao 266061 China

The result of an analysis of mollusca remains collected from the Chukchi Sea, Beaufort Sea and Bering Sea in the First chinese National Arctic Research Expedition, from July to September, 1.99 is presented. Seventeen species of mollusca have been identified, which belong to two classes: Bivalvia and Gastropoda. The compositions of the mollusca are very simple. According to the distribution pattern two groups may be distinguished among molluscan species. The Pan-Arctic and circumboreal group comprises Nuculana pernula, ***, Nucula bellotii, Astarte montagui, Seripes groenlandicus, Macoma calcarea, M. moesta alaskana, Liocyrna fluctuosa, Mya pseudoarenaria and Turritella polaris. Three species, Cyclocardia crebricostata, Trichotrois coronata and Argobuccinum oregonense are components of the Pan-Arctic and Pacific boreal group. With regard to feeding habits, detritus feeders dominate. There are 7 species of detritus feeders, i.e., Nuculana pernula, N. radiata, Nucula bellotii, Macoma calcarea, M. moesta alaskana, Macoma sp. and Trichotropis coronata. Detritus feeders are dominant with regard to the numbers of species as well as to the frequency of occurrence. Macoma calcarea is the most abundant species.

关键词： Chukchi Sea Beaufort Sea Bering Sea molluscan remains

Bismuth-free Mg_(3)Sb_(2) with enhanced room-temperature thermoelectric and mechanical properties

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Journal of Materiomics 2024年第5期10卷 1101-1108页

作者： Jie Song Peng luo Hailong {1. Hezhang Li Chao wang yi Niu Jing Jiang Clean Energy Materials and Engineering Center State Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu611731China The state {1. laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing100084China

Thermoelectric materials are competitive candidates for special cooling ***_(3)Sb_(2)-based materials consisting of inexpensive ingredients have profound thermoelectric *** present,alloying with Mg_(3)Bi_(2) is the most effective approach to optimize the thermoelectric properties of Mg_(3)Sb_(2)-based ***,the extremely low abundance of bismuth in the crust contradicts its economic *** this work,the ZrO_(2) micro-particles were separated into the Mg_(3.2)Sb_(1.99)Te_(0.01..The doping effect of Zr atoms at Mg sites increased the electrical conductivity,and the combined secondary phase lowered the lattice thermal *** acceptable degradation in the Seebeck coefficient,the sample combined with 5%(in mass)ZrO_(2) exhibited a dimensionless figure of merit(zT)of 0.49 and a power factor of 2.7 mW·m^(−1.·K^(−2) near room *** average zT in the range from 300 K to 500 K reached 0.8,on par with the Mg_(3)Sb_(2) single bond Mg_(3)Bi_(2) ***,the compressive and bending strengths reach 669 MPa and 269 MPa,respectively,far superior to the common room-temperature *** secondary phase showed a surprising and uncostly promotion of the Mg_(3)Sb_(2)-based thermoelectric materials,impelling the realization of its commercial application.

关键词： Mg_(3)Sb_(2)-Mg_(3)Bi_(2)alloy Secondary phase Room-temperature thermoelectric properties Mechanical properties Inexpensive ingredients

Topography and functional information of plasma membrane

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Science china(Life {1.) 2008年第2期51卷 95-103页

作者： sun DeLan1. CHEN JianMin1. SONG YanMei1. ZHU ChuanFeng2, PAN GeBo2 & WAN LiJun2 1.{1. laboratory of Photosynthesis and environmental Molecular Physiology, institute of Botany, chinese academy of sciences, Beijing 1.0093, china 2 institute of Chemistry, chinese academy of sciences, Beijing 1.0080, china key {1. of Photosynthesis and environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences Beijing China institute of Chemistry Chinese Academy of Sciences Beijing China

By using atomic force microscope (AFM), the topography and function of the plasmalemma surface of the isolated protoplasts from winter wheat mesophyll cells were observed, and compared with dead protoplasts induced by dehydrating stress. The observational results revealed that the plasma membrane of living protoplasts was in a state of polarization. Lipid layers of different cells and membrane areas exhibited distinct active states. The surfaces of plasma membranes were unequal, and were characterized of regionalisation. In addition, lattice structures were visualized in some regions of the membrane surface. These typical structures were assumed to be lipid molecular complexes, which were measured to be 1..8±0.09 nm in diameter and 1.9±0.3 nm in height. Both two-dimensional and three-dimensional imaging showed that the plasmalemma surfaces of winter wheat protoplasts were covered with numerous protruding particles. In order to determine the chemical nature of the protruding particles, living protoplasts were treated by proteolytic enzyme. Under the effect of enzyme, large particles became relatively looser, resulting that their width was increased and their height decreased. The results demonstrated that these particles were likely to be of protein nature. These protein particles at plasmalemma surface were different in size and unequal in distribution. The diameter of large protein particles ranged from 200 to 440 nm, with a central micropore, and the apparent height of them was found to vary from 1. to 40 nm. The diameter of mid-sized protein particles was between 40―60 nm, and a range of 1.8―5 nm was given for the apparent height of them. As for small protein particles, obtained values were 1.―40 nm for their diameter and 0.7―2.2 nm for height. Some invaginated pits were also observed at the plasma membrane. They were formed by the endocytosis of protoplast. Distribution density of them at plasmalemma was about 1. pits per 1. μm2. According to their size, we clas

关键词： atomic force microscope winter wheat protoplast plasma membrane surface membrane protein invaginated pits

Levels,trends and risk assessment of arsenic pollution in Yangzonghai Lake,Yunnan Province,china

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Science china Chemistry 2010年第8期53卷 1809-1817页

作者： wang ZhenHua1,HE Bin1,PAN XueJun2,ZHANG KeGang1,wang Chang1,sun Jing1,YUN ZhaoJun1 & JIANG GuiBin11state key laboratory of environmental Chemistry and Ecotoxicology Research Center for Eco-environmental sciences,chinese academy of sciences,Beijing 100085,china 2School of environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093,china state {1. laboratory of environmental Chemistry and Ecotoxicology Research Center for Eco-environmental {1. Chinese Academy of Sciences Beijing China School of environmental Science and Engineering Kunming University of Science and Technology Kunming China

The arsenic contamination accident in Yangzonghai Lake,Yunnan has been of wide *** order to investigate the arsenic distribution and concentration trends after the accident,samples including lake water,sediments,soil,aquatic organisms and crops were collected in November 2008,as well as in February,May and September *** average arsenic concentrations (arithmetic average) in lake water in the four sampling events were 1.6.9,1.7.3,1.9.3,and 1.1.1.μg/L,while those in the sediments were 32.87,62.41.62.99,and 46.96 μg/g,*** highest content of total arsenic in soil in the vicinity of Yangzonghai was 23.33 μg/g,which was below the limits of the relevant national *** total arsenic levels in most aquatic plants were in the range of 1.0-200 μg/g,with Vallisneria natans (Lour.) Hara having the highest concentration of ～300 μg/*** arsenic levels of fish and shrimps were in the range of 1.52-1..4 μg/g (dry weight).

关键词： Yangzonghai Lake arsenic pollution level trends risk assessment

Palaeogene fossil Populus leaves from Lanzhou Basin and their palaeoclimatic significance

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chinese Science Bulletin 2004年第14期49卷 1494-1501页

作者： sun Bainian1,2, YAN Defei1, XIE Sanping1, CONG Peiyun1, XIN Cunlin1 & YUN Fei1 1. key laboratory of Western china抯 environmental Systems of the Ministry of Education, Lanzhou University, Lanzhou 730000, china 2. state key laboratory of Palaeobiology and Stratigraphy, Nanjing institute of Geology and Palaeontology, chinese academy of Sci-ences, Nanjing 210008, china key {1. of Western china’s environmental Systems of the Ministry of Education Lanzhou University Lanzhou China state {1. laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

An angiosperm compression flora is found in Palaeogene from Lanzhou Basin and the cuticular analysis of Populus davidiana Dode in the flora is carefully made. Fur-thermore, the fossil cuticles are compared with the epidermal structures of extant Populus leaves growing in different en-vironments, i.e. moist, semimoist, and semiarid to arid cli-matic regions. The present experiments indicate that mature leaves of P. davidiana show leaf size from big to small, leaf cuticles from thick to thin and anticlinal walls of epidermal cells from faintness to clarity along with the increase of lati-tudes of the plant distributions, the climatic variation from moist to arid, the annual precipitation from more to less and the annual mean temperature from high to low. The fossil P. davidiana differs from the specimens collected from Shandan in semiarid to arid climatic regions but closely resembles the Wushan leaves in a semi-moist climatic area in a lot of fea-tures. In a word, the new research may reflect that the flora lives in a semi-moist climatic environment. The present dis-covery of compression of Paleogene Populus davidiana is of great significance to studying vegetation types, climatic and {1. changes during the primal uplifting of the Qinghai-Tibet Plateau.

关键词：古气候兰州盆地山杨化石角质层早第三纪被子植物

Simulation of energy and water balance in Soil-Vegetation-Atmosphere Transfer system in the mountain area of Heihe River Basin at Hexi Corridor of northwest china

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Science china Earth {1. 2005年第4期48卷 538-548页

作者： KANG Ersi1, CHENG Guodong1, , SONG Kechao1, JIN Bowen1, , LIU Xiande3 2 3 & wang Jinye3 1. Cold and Arid Regions environmental and Engineering Research institute, chinese academy of sciences, Lanzhou 730000, china 2. state key laboratory of Frozen Soil Engineering, chinese academy of sciences, Lanzhou 730000, china 3. academy of Water Resources Conservation Forest of Qilian Mountains, Gansu Province, Zhangye 734000, china Cold and Arid Regions environmental and Engineering Research {1. Chinese Academy of Sciences Lanzhou China state {1. laboratory of Frozen nSoil Engineering Chinese Academy of Sciences Lanzhou China academy of Water Resources Conservation Forest of Qilian Mountains Gansu Province Zhangye China

In the mountain area of inland Heihe River Basin at Hexi Corridor of northwest china during the vegetation growing season from May to September, the Simultaneous Heat and Water (SHAW) model of Soil-Vegetation-Atmosphere Transfer (SVAT) system is applied to simulating and stud{1.ng energy and water balance of the soil-residue-plant canopy layers in the Picea crassifolia forest and the grassland by the forest at the shaded slope and the grassland at the sun-facing slope. The simulation of energy balance indicates that net radiation of the grass- land at the sun-facing slope is more than that of the Picea crassifolia forest and the grassland by the forest at the shaded slope. The energy outgoing components are the first latent heat and next sensible heat from the grassland both at the shaded slope and the sun-facing slope, but those at the former are less. The energy outgoing components are the first sensible heat and next latent heat from the Picea crassifolia forest. The composition and distribution of energy in the soil-residue-plant canopy layers in the Picea crassifolia forest and the grassland by the forest at the shaded slope make the soil layer receive less energy, which therefore, especially the forest possesses the energy conditions for soil water conservation. The simulation of water balance indicates that the water loss of the grassland at the sun-facing slope is mainly caused by soil evaporation, while evapotranspiration of the Picea crassifolia forest and the grassland by the forest at the shaded slope is less than that of the grassland at the sun-facing slope. Half of the evapotranspiration of the Picea crassifolia forest and the grassland by the forest at the shaded slope is consumed by transpiration. After precipitation, the soil water storage is increased much more for the Picea crassifolia forest and also more for the grassland by the forest at the shaded slope. Therefore the shaded slope vegetation, especially the forest is favorable for soil water s

关键词： inland rivers, mountain vegetation zone, Soil-Vegetation-Atmosphere Transfer (SVAT) system, energyand water balance, simulation.