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Ferroelectric-controlled magnetoelectric effect at the CrI3/HfO2 interface

Physical Review B 2024年第5期110卷 054407-054407页

作者： Tianpeng Duan Yun Zhang Jie Jiang Jingman Pang Min Liao Qiong Yang Hunan Provincial Key Laboratory of Thin Film Materials and Devices School of Materials Science and Engineering College of Physicals and Optoelectronic Technology Collaborative Innovation Center of Rare-Earth Functional Materials and Devices Development Faculty of Chemistry and Chemical Engineering

The effective manipulation magnetic properties of two-dimensional magnets through electric field presents profound implications for spintronics. In this study, we investigate the ferroelectric-controlled magnetoelectric coupling within the CrI3/HfO2(111)/CrI3 heterostructure by using first-principles calculations. It is found that the magnetic moments of CrI3 are notably responsive to the polarization orientation—either directed towards (Pin) or away (Pout) from the interface. The polarization of HfO2 triggers the accumulation (depletion) of screening electrons at the Pin (Pout) interface, which affects the relative population of the exchange-split spin bands at the interface and thus results in the enhanced (reduced) total magnetic moments of the monolayer CrI3. The easy magnetization axis of CrI3 switches from an out-of-plane (Pout state) to an in-plane (Pin state) direction by the reversal of ferroelectric polarization of HfO2. Additionally, the Curie temperature (TC) of monolayer CrI3 is enhanced by 78% in the Pout state. This work provides useful guidelines for the study of interfacial magnetoelectric coupling and design of multiferroic devices.

关键词： Ferroelectricity Magnetoelectric effect 2-dimensional systems First-principles calculations

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Chemically Modified Lignin:Correlation between Structure and Biodegradability

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Journal of Renewable Materials 2021年第12期9卷 2119-2128页

作者： Meifeng Wang Wubliker Dessie Hui Li Key Laboratory of Biomaterials of Guangdong Higher Education Institutes Guangdong Provincial Engineering and Technological Research Center for Drug Carrier DevelopmentDepartment of Biomedical EngineeringJinan UniversityGuangzhouChina Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources Hunan University of Science and EngineeringYongzhouChina

Lignin is the most abundant heteropolymer based on aromatic subunits in *** quantities of lignin are annually produced from pulping processes and biorefinery *** unclearly defined structure and difficult biodegradation mainly limit its *** work focused on the effect of hydroxylation of lignin on its microbial *** carbonyl-modified lignin,and hydroxylated-lignin were synthesized with di-tert-butyl dicarbonate and hydrogen peroxide,respectively,using lignin as raw *** degradation of the modifiedlignins both by *** and *** were analyzed using UV-vis *** revealed that the lignin degradation velocity raises with the increase hydroxylation level of ***,FTIR and 1H NMR analysis of the biodegradation products of lignin further indicated that higher content of hydroxyl groups in lignin facilitated the demethylation combined with the aromatic ring cracking in the presence of fungus and bacteria.

关键词： Lignin modification biodegradation degradation mechanism

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Toughening of zirconia ceramics with micro-nano binary particles

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Ceramics International 2025年

作者： Luo, Fei Wen, Jin Tian, Xiuying Zhu, Ling Li, Chunyan Cao, Jianhui Li, Guowen Kang, Wentao Lin, Hua-Tay Luo, Fenghua State Key Laboratory of Powder Metallurgy Central South University Changsha410083 China Hunan Provincial Modern Industry School of Advanced Ceramics Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials Hunan University of Humanities Science and Technology Loudi417000 China Hunan Province Xinhua County Xinxing Electron Ceramics Co. Ltd Hunan Xinhua417000 China Xinhua Shunda Electronic Ceramics Co. Ltd Hunan Xinhua417000 China Antaeus Co. Ltd Hunan Loudi417000 China Hunan Province Material Valley Technology Development Co. Ltd Hunan Center of Technology Innovation for Advanced Ceramics Hunan Loudi417000 China Guangdong University of Technology Guangzhou510006 China

Toughened zirconia ceramics were prepared in this study by incorporating zirconia microspheres with zirconia nanopowders, followed by molding and two-stage sintering. Two methods were employed to mix the microspheres with the nanopowders. One method involved processing a mixture of nanopowders and microspheres, which was produced by the surface treatment and calcination of spray dried granules, to obtain compressed granules. The other method involved blending zirconia microspheres into spray dried granules to obtain mixed granules. The influence of the microsphere content on the microstructure and mechanical properties of zirconia ceramics was systematically investigated. Compared with zirconia ceramics prepared using spray dried granules without microspheres, the incorporation of 10 wt% microspheres into compressed granules or mixed granules significantly increased the fracture toughness (KIC) by 49.70 % and 68.49 %, respectively. A micropore toughening mechanism was proposed based on an analysis of microstructure evolution in microsphere-containing zirconia ceramics, which revealed that the introduction of microspheres formed discontinuously distributed regions with micropores within the zirconia ceramics. These micropores located at the primary crack tips generated microcracks, leading to the bifurcation and deflection of the primary cracks, thereby prolonging crack propagation paths and enhancing energy dissipation during the crack propagation, which improved the fracture toughness of zirconia ceramics. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Micropores

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Green synthesis of multifunctional carbon dots for anti-cancer and anti-fungal applications

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Chinese Journal of Chemical Engineering 2021年第9期34卷 97-104页

作者： Shaojing Zhao Li Huang Yong Xie Bin Wang Feng Wang Minhuan Lan Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China State Key Laboratory of the Discovery and Development of Novel Pesticide Shenyang Sinochem Agrochemicals R&D Co.Ltd.Shenyang 110021China Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Carbon dots(CDs)have become popular nanomaterials in biomedical and agricultural *** we synthesized multifunctional CDs which showed anti-cancer and anti-fungal *** low cytotoxicity,stable fluorescence and high photothermal conversion efficiency enable the CDs with imagingguided photothermal *** CDs also exhibited intrinsic anti-fungal activity even at a low concentration,i.e.,40 mg·L^(-1) of CDs induced 20%mortality in cucumber downy ***,the largeπ-conjugated nanostructure and the richness of amino and hydroxyl groups make them a powerful delivery platform for flumorph(a fungicide)with a high loading efficiency of 47.18%.Meanwhile,the heat converted from the light can accelerate the release of flumorph from CDs,and thus efficiently kill fungus.

关键词： Carbon dots Photothermal therapy Anti-fungus Delivery Pesticide

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Biogeochemical fractal characteristics of trace elements in the Shizhuyuan polymetallic mining area and their significance for prospecting

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Geochemistry: Exploration, Environment, Analysis 2023年第2期23卷 -页

作者： Zhou, Hao Tan, Kaixuan Li, Yongmei Xie, Yanshi Han, Shili Xiao, Wenzhou Hunan Provincial Key Laboratory of Rare Metal Mineral Development and Waste Geological Disposal Technology University of South China Hunan Hengyang421001 China School of Resource Environment and Safety Engineering University of South China Hunan Hengyang421001 China

Shizhuyuan is a world-class W–Sn supergiant polymetallic deposit, with a large area of potential mineralization around it. Samples were taken of Dicranopteris dichotoma, which is widely distributed in the Shizhuyuan mining area. Biogeochemical and Number–Size fractal methods were used to evaluate the biogeochemical characteristics of trace elements in the samples and the feasibility of indicating subsurface mineral deposits. The results reveal that D. dichotoma not only has strong uptake of the active state of metal elements (Zn, Mo, Cd, Sn, etc.) in the soil, but also show the geochemical anomalies of Zn, Fe, Tl, Ag, Pb, U, As, Bi, Cd, Mo and Sn in the study area. The Number–Size fractal method can effectively identify the concentration populations of biogeochemical target elements and obtain convincing anomaly thresholds. Analysis of the metal content of D. dichotoma is an effective tool for biogeochemical exploration of Pb–Zn–U hydrothermal deposits in the study area. Zinc as well as U are target elements, and Tl appears to be an effective pathfinder element for Pb–Zn–U mineralization. In addition, 260–340 m of Line 3# and 1100–1200 m of Line 8# are the key areas for future exploration of Pb–Zn–U hydrothermal deposits. © 2023 The Author(s).

关键词： Zinc deposits

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Epigenetics in the modern era of crop improvements

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Science China Life Sciences 2025年第6期 1570-1609页

作者： Yan Xue Xiaofeng Cao Xiangsong Chen Xian Deng Xing Wang Deng Yong Ding Aiwu Dong Cheng-Guo Duan Xiaofeng Fang Lei Gong Zhizhong Gong Xiaofeng Gu Chongsheng He Hang He Shengbo He Xin-Jian He Yan He Yuehui He Guifang Jia Danhua Jiang Jianjun Jiang Jinsheng Lai Zhaobo Lang Chenlong Li Qing Li Xingwang Li Bao Liu Bing Liu Xiao Luo Yijun Qi Weiqiang Qian Guodong Ren Qingxin Song Xianwei Song Zhixi Tian Jia-Wei Wang Yuan Wang Liang Wu Zhe Wu Rui Xia Jun Xiao Lin Xu Zheng-Yi Xu Wenhao Yan Hongchun Yang Jixian Zhai Yijing Zhang Yusheng Zhao Xuehua Zhong Dao-Xiu Zhou Ming Zhou Yue Zhou Bo Zhu Jian-Kang Zhu Qikun Liu State Key Laboratory of Wheat Improvement Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences in Weifang State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences State Key Laboratory of Hybrid Rice College of Life Sciences Wuhan University School of Life Sciences Division of Life Sciences and Medicine University of Science and Technology of China State Key Laboratory of Genetic Engineering Collaborative Innovation Center of Genetics and Development Department of Biochemistry and Biophysics Institute of Plant Biology School of Life Sciences Fudan University Key Laboratory of Plant Design National Key Laboratory of Plant Molecular Genetics Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences Center for Plant Biology School of Life Sciences Tsinghua University Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE) Northeast Normal University State Key Laboratory of Plant Environmental Resilience Frontiers Science Center for Molecular Design Breeding College of Biological Sciences China Agricultural University College of Life Sciences Institute of Life Science and Green Development Hebei University Biotechnology Research Institute Chinese Academy of Agricultural Sciences College of Biology Hunan Key Laboratory of Plant Functional Genomics and Developmental Regulation Hunan Engineering and Technology Research Center of Hybrid Rapeseed Hunan University Institute of Advanced Agricultural Sciences School of Advanced Agricultural Sciences Peking University State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural University National Institute of Biological Sciences Key Laboratory of Seed Innovation Institute of Genetics and Developme

Epigenetic mechanisms are integral to plant growth, development, and adaptation to environmental stimuli. Over the past two decades, our comprehension of these complex regulatory processes has expanded remarkably, producing a substantial body of knowledge on both locus-specific mechanisms and genome-wide regulatory patterns. Studies initially grounded in the model plant Arabidopsis have been broadened to encompass a diverse array of crop species, revealing the multifaceted roles of epigenetics in physiological and agronomic traits. With recent technological advancements, epigenetic regulations at the single-cell level and at the large-scale population level are emerging as new focuses. This review offers an in-depth synthesis of the diverse epigenetic regulations, detailing the catalytic machinery and regulatory functions. It delves into the intricate interplay among various epigenetic elements and their collective influence on the modulation of crop traits. Furthermore, it examines recent breakthroughs in technologies for epigenetic modifications and their integration into strategies for crop improvement. The review underscores the transformative potential of epigenetic strategies in bolstering crop performance, advocating for the development of efficient tools to fully exploit the agricultural benefits of epigenetic insights.

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PPARα affects hepatic lipid homeostasis by perturbing necroptosis signals in the intestinal epithelium

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Acta Pharmaceutica Sinica B 2024年第11期14卷 4858-4873页

作者： Shufang Na Yanjie Fan HongLei Chen Ling Li Guolin Li Furong Zhang Rongyan Wang Yafei Yang Zixia Shen Zhuang Peng Yafei Wu Yong Zhu Zheqiong Yang Guicheng Dong Qifa Ye Jiang Yue Department of Pharmacology Taikang Medical School(School of Basic Medical Sciences)Wuhan UniversityWuhan 430071China Zhongnan Hospital of Wuhan University Institute of Hepatobiliary Diseases of Wuhan UniversityTransplant Center of Wuhan UniversityNational Quality Control Center for Donated Organ ProcurementHubei Key Laboratory of Medical Technology on TransplantationHubei Provincial Clinical Research Center for Natural Polymer Biological LiverWuhan 430071China Department of Pathology Taikang Medical School(School of Basic Medical Sciences)Wuhan UniversityWuhan 430071China Center for Biomedical Aging National&Local Joint Engineering Laboratory of Animal Peptide Drug DevelopmentCollege of Life SciencesHunan Normal UniversityChangsha 410081China College of Life Science Inner Mongolia Agricultural UniversityHohhot 010011China Hubei Province Key Laboratory of Allergy and Immunology Wuhan 430060China

Rapid turnover of the intestinal epithelium is a critical strategy to balance the uptake of nutrients and defend against environmental insults, whereas inappropriate death promotes the spread of inflammation. PPARα is highly expressed in the small intestine and regulates the absorption of dietary lipids. However, as a key mediator of inflammation, the impact of intestinal PPARα signaling on cell death pathways is unknown. Here, we show that Pparα deficiency of intestinal epithelium up-regulates necroptosis signals, disrupts the gut vascular barrier, and promotes LPS translocation into the liver. Intestinal Pparα deficiency drives age-related hepatic steatosis and aggravates hepatic fibrosis induced by a high-fat plus high-sucrose diet (HFHS). PPARα levels correlate with TRIM38 and MLKL in the human ileum. Inhibition of PPARα up-regulates necroptosis signals in the intestinal organoids triggered by TNF-α and LPS stimuli via TRIM38/TRIF and CREB3L3/MLKL pathways. Butyric acid ameliorates hepatic steatosis induced by intestinal Pparα deficiency through the inhibition of necroptosis. Our data suggest that intestinal PPARα is essential for the maintenance of microenvironmental homeostasis and the spread of inflammation via the gut-liver axis.

关键词： Gut-liveraxis NAFLD PPARα Intestine LPS Liver

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Analysis of the bolt performance with shear force 10

Analysis of the bolt performance with shear force

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2020 10th Chinese Geosynthetics Conference and International Symposium on Civil Engineering and Geosynthetics, ISCEG 2020

作者： Mao, Dawei Chen, Yu Hunan Provincial Key Laboratory of Hydropower Development Key Technology Changsha Hunan province410014 China PowerChina Zhongnan Engineering Corporation Limited Changsha Hunan province410014 China

The bolt anchorage performance with shear force has been analysed by analytical method in this paper. By coding in Matlab, the loop and the judgment statement can be used to control the displacement angle. The force-displacement curve of the analysis model from the beginning of loading to the failure of the bolt under a certain displacement loading angle is obtained. In the test and field, the values of displacement and force before failure and the load-displacement curves before the peak value can be obtained by using the program with the parameters. The bolt deformation in different strength surrounding rock mass and the anchoring influence of the rock bolt with different diameters have been studied. The resultant displacement increases linearly with the increase of the bolt, and the resultant force increases exponentially with the increase of the bolt. © The Authors, published by EDP Sciences 2020.

关键词： Bolts

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Undeveloped Chloroplasts Facilitate the Accumulation of Free Amino Acids in Rice Hulls

SSRN

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SSRN 2024年

作者： Liu, Tao-Li Huang, Yu-Bo Yang, Xu-Lei Deng, Jun-Hao Wang, Ruo-Zhong Yuan, Ding-Yang Sheng, Xia-Bing Sun, Xue-Wu Yu, Dong Sun, Zhi-Zhong Chen, Jing Peng, Rui Xiao, Lang-Tao Tan, Yan-Ning Hunan Provincial Key Laboratory of Phytohormones and Growth Development Hunan Agricultural University Changsha410128 China Sanya National Saline-Tolerant Rice Technology Innovation Center Sanya572019 China College of Agriculture and Biotechnology Hunan University of Humanities Science and Technology Loudi417000 China College of Tropical Agriculture and Forestry Hainan University Haikou570208 China State key Laboratory of Hybrid Rice Changsha410125 China

Although rice hulls can accumulate chloroplasts and produce free amino acids, the relationship between these two processes remains unclear. The white-hull rice mutant whl is a good genetic model to investigate this problem. In the present study,the hulls of wh1 were stalled at the protoplast stage without lamellar structure. The total chlorophyll content of hulls on the fifth day after flowering decreased by 56.72%, whereas that of free amino acids of mature hulls increased by 26.62%, compared with the control. The wh1 was controlled by NUS1 that encodes a plastid transcriptional antitermination with a NUSB domain. More importantly, the NUS1 knock-out line (KO-1 and KO-2) accumulated abnormal chloroplast and free amino acids in the hulls with an increase of 20.85% and 21.48% respectively. In conclusion, undeveloped chloroplasts facilitate the accumulation of free amino acids in rice hulls. © 2024, The Authors. All rights reserved.

关键词： Lamellar structures

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Research on properties of hollow glass microspheres/epoxy resin composites applied in deep rock in-situ temperature-preserved coring

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Petroleum Science 2022年第2期19卷 720-730页

作者： Zhi-Qiang He Yang Yang Bo Yu Jian-Ping Yang Xiang-Biao Jiang Bo Tian Man Wang Xi-Yuan Li Si-Qing Sun Hui Sun State Key Laboratory of Hydraulics and Mountain River Engineering MOE Key Laboratory of Deep Earth Science and EngineeringCollege of Water Resource and HydropowerSichuan UniversityChengdu 610065SichuanChina Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy Shenzhen UniversityShenzhen 518060GuangdongChina School of Mechanical Engineering Sichuan UniversityChengdu 610065SichuanChina College of Polymer Science and Engineering Sichuan UniversityChengdu 610065SichuanChina Changsha High tech Automation Equipment Co. LTD Changsha 410100HunanChina Jinshi Drilltech co. LtdTangshan 063000HebeiChina State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization Institute of Coal Mining and UtilizationPingdingshan Tianan Coal Mining Co.LTD.Pingdingshan 467000China Xi’an Research Institute China Coal Technology&Engineering Group CorpXi’an 710077China

Deep petroleum resources are in a high-temperature ***,the traditional deep rock coring method has no temperature preserved measures and ignores the effect of temperature on rock porosity and permeability,which will lead to the distortion of the petroleum resources reserves ***,the hollow glass microspheres/epoxy resin(HGM/EP)composites were innovatively proposed as temperature preserved materials for in-situ temperature-preserved coring(ITP-Coring),and the physical,mechanical,and temperature preserved properties were *** results indicated that:As the HGM content increased,the density and mechanical properties of the composites gradually decreased,while the water absorption was deficient without hydrostatic *** composites with 50 vol%HGM,when the hydrostatic pressure reached 60 MPa,the water absorption was above 30.19%,and the physical and mechanical properties of composites were *** the hydrostatic pressure was lower than 40 MPa,the mechanical properties and thermal conductivity of composites were almost ***,the composites with 50 vol%HGM can be used for ITPCoring operations in deep environments with the highest hydrostatic pressure of 40 ***,to further understand the temperature preserved performance of composites in practical applications,the temperature preserved properties were *** unsteady-state heat transfer model was established based on the test results,then the theoretical change of the core temperature during the coring process was *** above tests results can provide a research basis for deep rock in-situ temperature preserved corer and support accurate assessment of deep petroleum reserves.

关键词： Deep rock in-situ temperature-preserved coring(ITP-Coring) Hollow glass microspheres/epoxy resin composites Hydrostatic pressure Unsteady-state heat transfer model

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