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Barite in omphacite-hosted K-feldspar + quartz poly-crystalline aggregates from the Sulu eclogites and its implications

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Chinese Science Bulletin 2007年第21期52卷 2995-3001页

作者： ZENG LingSen liu FuLai LIANG fenghua CHEN FangYuan Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

K-feldspar + quartz polycrystalline aggregates were found as sub-millimeter-size inclusions with a pseudomorph after coesite (?) in omphacites from a number of Sulu eclogites. In these aggregates, round or subhedral barites occur as tiny inclusions in either K-feldspar or quartz. Energy dispersive spectroscopy (EDS) analyses show that these barites have (1) 33.86%―41.12% SO3, 0%―34.65% SrO, and 24.12%―63.55% BaO, (2) seemingly negative linear correlations between SrO and BaO, indicating that they are ideal solid solutions of barite (BaSO4) and celestite (SrSO4), and (3) highly variable Sr/Ba molar ratios ranging from 0 to 2.1. Presence of barites in the Sulu eclogites not only indicates oxidation of the subducting continental crust, but also very limited and restricted fluids pre- sented during exhumation of the Sulu UHP eclogites.

关键词：重晶石集料变质作用石英石

A novel tobacco gene coding for a product similar to bacterial two-component regulators

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Chinese Science Bulletin 1999年第11期44卷 1025-1029页

作者： Jinsong Zhang Can Xie Feng liu fenghua liu Shouyi Chen Chinese Acad Sci Inst Genet Beijing 100101 Peoples R China

The two-component signaling system has been studied in bacteria. It takes part in signal transduction of adaptive behavior. Recent studies have shown that a similar two-component system is also present in eukaryotes. Examples of this are ETR1 and CKI1 genes which may involve the signal transduction of plant hormone ethylene and cytokinin respectively. The cloning and characterization of a novel gene ( NTHK1 ) fragment from tobacco are *** partial sequence codes for a product which shows similarity to many two-component signaling proteins. Southern blot analysis indicated that there are 2 to 3 copies of NTHK1 gene in tobacco genome (allotetraploid). Homologous genes may also exist in other plants such as Arabidopsis, soybean and spinach. The expression of NTHK1 gene has also been analyzed in *** studies on the isolation of full-length cDNA of NTHK1 gene will elucidate more clearly its function in signal perception and transduction.

关键词： tobacco two-component signaling system signal transduction.

Flow and Melting Thermal Transfer Enhancement Analysis of Alumina,Titanium Oxide-Based Maxwell Nanofluid Flow Inside Double Rotating Disks with Finite-Element Simulation

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Computer Modeling in Engineering & Sciences 2022年第3期130卷 1771-1788页

作者： Liangliang Chen Madeeha Tahir Sumeira Yasmin Taseer Muhammad Muhammad Imran fenghua liu ChongqingWater Resources and Electric Engineering Collage Chongqing402160China Department of Mathematics Government College Women UniversityFaisalabad38000Pakistan Department of Mathematics Government College University FaisalabadLayyah CampusLayyah31200Pakistan Department of Mathematics College of SciencesKing Khalid UniversityAbha61413Saudi Arabia Department of Mathematics Government College UniversityFaisalabad38000Pakistan

The energy produced by the melting stretching disks surface has a wide range of commercial applications,including semi-conductor material preparation,magma solidification,permafrost melting,and frozen land refreezing,among *** view of this,in the current communication we analyzed magnetohydrodynamic flow ofMaxwell nanofluid between two parallel rotating *** are important due to their astonishing properties in heat conduction flows and in the enhancement of electronic and manufacturing ***,the distinct tinysized particles Al_(2)O_(3)and TiO_(2)in theMaxwell water-based fluid for enhancing the heat transfer rate are *** heat equation is developed in the occurrence of thermal *** influences of melting impacts are *** mathematical model is developed in the form of partial differential expressions then converted to ordinary differential equations by employing tool of similarity *** element method(FEM)is chosen for solving the nonlinear governing ordinary differential equations(ODEs)with necessary *** consequence of flow parameters against the velocity profiles and heat transport field is *** noted novelty of this communication is to discuss the thermal transfer of Maxwell nanofluid model through double stretching disks with thermal radiation and melting ***,Al_(2)O_(3)/water and TiO_(2)/water are considered in the modeling.

关键词： Maxwell nanofluid melting phenomenon thermal radiation revolving stretching disks finite element method(FEM)

Enhanced interfacial polarization of defective porous carbon confined CoP nanoparticles forming Mott-Schottky heterojunction for efficient electromagnetic wave absorption

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Nano Research 2023年第3期16卷 4160-4169页

作者： Baojun Wang Fangzhi Huang Hao Wu Zijie Xu Shipeng Wang Qinghua Han fenghua liu Shikuo Li Hui Zhang School of Materials Science and Engineering Anhui UniversityHefei 230601China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Ningbo Institute of Materials Technology and Engineering Chinese Academy of ScienceNingbo 315201China Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University) Ministry of EducationHefei 230601China

Integrating heterogeneous interface through nanostructure design and interfacial modification is essential to realize strengthened interfacial polarization relaxation in electromagnetic wave ***,an in-depth comprehension of the interfacial polarization behavior at hetero-junction/interface is highly desired but remains a great ***,a Mott-Schottky heterojunction consisting of honeycomb-like porous N-doped carbon confined CoP nanoparticles(CoP@HNC)is designed to elevate the interfacial polarization ***,corresponding electron migration and redistribution between the heterointerface of defective carbon and CoP nanoparticles are *** significant difference in the work function on both sides of heterogeneous interface boosts the interfacial polarization in high frequency ***,the relevant spectroscopic characterizations demonstrate that electron spontaneously migrates from CoP to N-doped carbon at the heterointerface,thereby contributing to the accumulation of electron on defective carbon side and the distribution of hole on CoP ***,benefitting from the synergistic effects of three-dimensional porous conductive carbon skeleton,foreign N heteroatoms,special CoP nanoparticles,and the resultant CoP/N-doped carbon Mott-Schottky heterojunction,the CoP@HNC exhibits remarkable electromagnetic wave absorption performances with minimum reflection loss up to−60.8 dB and the maximum effective absorption bandwidth of 4.96 GHz,which is superior to most of recently reported transition metal phosphides microwave absorbing *** present work opens a new avenue for designing heterogeneous interface to realize strengthened microwave absorption capability and also reveals the in-depth influence of interface structure on electromagnetic wave absorption.

关键词： honeycomb-like structure Mott-Schottky heterojunction interfacial polarization electron transfer microwave absorption

Properties of ABS/Organic-Attapulgite Nanocomposites Parts Fabricated by Fused Deposition Modeling

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Journal of Renewable Materials 2020年第11期8卷 1505-1518页

作者： Ling Wang Shenglong Jiang Chenchen Huang Pengyuan Dai fenghua liu Xiaopeng Qi Gaojie Xu Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China Key Laboratory of Additive Manufacturing Materials of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of ScienceNingbo315201China

The paper discusses the mechanical and thermal performance manifested in natural nanorods attapulgite(ATP)reinforced Acrylonitrile butadiene styrene(ABS)nanocomposites in the process of fused deposition modeling(FDM).Molten extrusion technique was taken to manufacture the filaments of ABS/organic-attapulgite(OAT)nanocomposites with different mass fraction and the printing operation was made by one commercial FDM three-dimensional(3D)*** indicate that the mechanical performance of these FDM 3D printed specimens are improved obviously via the introduction of OAT,and tensile strength of the ABS/OAT nanocomposites parts with only 2 wt%OAT addition is enhanced by 48.1%.At the same time,the addition OAT can reduce the linear expansion coefficient and creep flexibility,and improve the thermal stability and dimensional accuracy of these FDM 3D printed parts.

关键词： ABS organic-attapulgite fused deposition modeling nanocomposites

Preparation and Electrorheological Response of PAL/TiO_(2)/PANI Nanorods

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Journal of Renewable Materials 2021年第10期9卷 1707-1715页

作者： Ling Wang Chenchen Huang Ping Zhang fenghua liu Ting Zou Zhixiang Li Jianfei Zhang Gaojie Xu Ningbo Institute of Materials Technology and Engineering Chinese Academy of ScienceNingbo315201China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China Xuyi County Attapulgite Application Technology R&D and Achievement Transformation Center Xuyi211700China

Using palygorskite(PAL)as template,the PAL/TiO_(2)/PANI nano-rods were synthesized by heterogeneous precipitation and in-situ *** synthesized PAL/TiO_(2)/PANI nanorods were used as a novel electrorheological(ER)fluid by mixing with silicone oil,which showed excellent ER *** yield stress of the PAL/TiO_(2)/PANI based ER fluid(15 vol%)reached 8.8 kPa under 4 kV mm^(−1) electric *** dynamic shear stress of the PAL/TiO_(2)/PANI based ER fluid could maintain a stable level in the shear rate range of 0.1–100 s^(−1).Furthermore,the PAL/TiO_(2)/PANI ER fluid exhibited excellent suspension stability.

关键词： Electrorheological palygorkite titanium oxide polyaniline nanorod

Effect of Complex Preparation on the Hemorheological Indexes of Heat Stress Piglets

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Animal Husbandry and Feed Science 2015年第4期7卷 253-256页

作者： Peng Xiaoqing liu fenghua Yan Peishi Laboratory Animal Center of Nantong University Department of Animal Science Beijing University of Agriculture College of Animal Science Nanjing Agricultural University

In the study, heat stress environment was simulated by artificial climate cabin to establish the heat stress model of piglets. A total of 64 2-month-old Chinese miniature pigs used for test were sdected and randomly divided into control group, heat stress group, complex preparation extract I treatment group and complex preparation extract II treatment group. Hematocrit was analyzed by Wintrobe test, meanwhile, the hemorheological indexes such as whole blood viscosity were analyzed by the automated analysis system of hemorrheology. In order to study the dynamic changes of complex preparation on the hemorheologieal indexes of heat stress piglets. The results showed that the piglets whole blood viscosity at high shear rate on the 10~ days in heat stress group was significantly highe~ than that in control group （P 〈 0.05） ; erythrocyte deformation indexes on the 6th and 10th days in heat stress group were significantly lower than that in control group （P 〈 0.05） ; hematocfit on the 1＂, 3＇~, 6~h and 10＇h days in heat stress group was significantly higher than that in control group （P 〈 0.05）. Hemorhealogieal inde- xes of the piglets in treatment group adding with complex preparation had been significantly restored, the effect on the 10th day after the stress was the most significant （P 〈 0.05）. The test results indicated that heat stress showed some significant influences on the health of piglets. Complex preparation could reduce the physiological damage causing by heat stress, and the effect of complex preparation II was better than that of complex preparation I.

关键词： Complex preparation Heat stress Piglets Hemorhealogy

Spatial Distribution of Surface Soil Organic Carbon Density and Related Factors along an Urbanization Gradient in Beijing

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Journal of Resources and Ecology 2020年第5期11卷 508-515页

作者： TIAN Yuhong liu fenghua WANG Tiantian State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Urban surface soil has a unique set of structures and processes that affect surface soil organic carbon density(SOCdensity) and its spatial variations. Using Beijing as a case study, and assisted by field investigations and experiments, we analyzed the spatial distribution of SOCdensity in different land use types and functional regions, and assessed associated factors such as urbanization level, the physiochemical properties of soil and plant configurations. The present study aims to provide useful information about the mechanisms driving soil organic carbon and climate change in developing and developed areas in urbanized regions like Beijing. Results indicate that P is the main factor positively influencing SOCdensity in most regions. Because of the specific interference directly related to human beings in urban areas, with decreases in the urbanization level, more physiochemical factors of soil can influence SOCdensity. SOCdensity under grasses is not significantly different from that under other plant compositions. Urbanization processes decrease the heterogeneity of the spatial pattern of SOCdensity in most land use types, but increased its contents when the area reached a developed level in Beijing. More factors related to human interference and spatial variation of surface soil carbon storage, especially under impervious land in urban areas, should be considered in future studies.

关键词： soil organic carbon density urbanization soil physiochemical properties plant configuration

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中美俄在亚太:政策演变与博弈趋势

俄罗斯研究 2020年第6期 72-104页

作者：柳丰华中国社会科学院俄罗斯东欧中亚研究所俄罗斯外交研究室

中、美、俄三国在亚太地区的合作与竞争,是影响亚太局势和地区格局的最重要因素。国际体系中的中美俄三角格局奠定了亚太地区中美俄关系的基调。冷战结束以来,美国一直致力于防范与遏制地区大国,维护其在亚太地区的霸权。中国的对亚太... 详细信息

中、美、俄三国在亚太地区的合作与竞争,是影响亚太局势和地区格局的最重要因素。国际体系中的中美俄三角格局奠定了亚太地区中美俄关系的基调。冷战结束以来,美国一直致力于防范与遏制地区大国,维护其在亚太地区的霸权。中国的对亚太政策经历了从睦邻友好与务实合作到主动塑造亚太地区合作架构,构建亚太命运共同体的转变。俄罗斯由于国力衰退,安全和发展的战略重心都在欧洲等原因,其对亚太政策包括保障东部边界安全,发展与亚太国家的贸易、能源和军事技术合作,融入地区经济一体化等,因而在亚太地区影响有限。美国与中国的遏制与反制,成为亚太地区中美俄三边关系的主轴。亚太地区格局将向均衡、多元复合的区域秩序演进。

关键词：亚太地区格局中美俄三角关系中国对亚太政策美国对亚太政策俄罗斯对亚太政策