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Journal of Materials Science & Technology 2023年第36期167卷 237-247页

作者： Meng Lan Xiaoli Dong Nan Zheng xiaoxin zhang Yu Wang Xinxin zhang School of Light Industry and Chemical Engineering Dalian Polytechnic UniversityDalian 116034China

Highly competent and economical photocatalysts are one of the most charming targets in environmental restoration and clean production.Herein,a novel sulfur-vacancy-rich Bi/Bi_(2)S_(3)/SnS_(2)Z-scheme heterostruc-ture was constructed in situ and applied for the photoreduction Cr(VI)and nitrogen fixation.The fab-ricated Bi/Bi_(2)S_(3)/SnS_(2)-2 exhibits the optimum photoreduction Cr(VI)performance with the efficiency of 94.5%within 15 min visible light irradiation.The remarkably enhanced catalytic efficiency derived from the synergistic effect of the construction of intimate contacted interface,abundant sulfur vacancy and surface plasmon resonance(SPR)effect of metal Bi.Meanwhile,the excellent photocatalytic nitrogen fix-ation property(96.4μmol g^(-1)h^(-1))was achieved by Bi/Bi_(2)S_(3)/SnS_(2)-2 under full solar illumination because sulfur vacancy could provide sufficient catalytic sites to accelerate the adsorption and nitrogen activation.The Z-scheme heterostructure was proposed to expound the photocatalytic mechanism.This work offers a new perspective on hierarchical heterostructure with plentiful vacancies for environmental remediation and energy development.

关键词： Sulfur-vacancy-rich Bi/Bi_(2)s_(3)/SnS_(2) Z-scheme heterostructure SPR effect Cr(VI)reduction Nitrogen fixation

Cross-satellite calibration of high-energy electron fluxes measured by FengYun-4A based on Arase observations

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Earth and Planetary Physics 2023年第5期7卷 565-575页

作者： XiaoYu Wang Xing Cao Xin Ma xiaoxin zhang AnQin Chen JunHu Dong BinBin Ni XianKang Dou Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Key Laboratory of Space Weather National Satellite Meteorological Center(National Center for Space Weather)China Meteorological AdministrationBeijing 100081China Innovation Center for FengYun Meteorological Satellite(FYSIC) National Satellite Meteorological CenterChina Meteorological AdministrationBeijing 100081China

We use the High-energy Electron Experiments(HEP)instrument onboard Arase(ERG)to conduct an energy-dependent cross-satellite calibration of electron fluxes measured by the High Energy Particle Detector(HEPD)onboard FengYun-4A(FY-4A)spanning from April 1,2017,to September 30,2019.By tracing the two-dimensional magnetic positions(L,magnetic local time[MLT])of FY-4A at each time,we compare the datasets of the conjugate electron fluxes over the range of 245–894 keV in 6 energy channels for the satellite pair within different sets of L×MLT.The variations in the electron fluxes observed by FY-4A generally agree with the Arase measurements,and the percentages of the ratios of electron flux conjunctions within a factor of 2 are larger than 50%.Compared with Arase,FY-4A systematically overestimates electron fluxes at all 6 energy channels,with the corresponding calibration factors ranging from 0.67 to 0.81.After the cross-satellite calibration,the electron flux conjunctions between FY-4A and Arase show better agreement,with much smaller normalized root mean square errors.Our results provide a valuable reference for the application of FY-4A high-energy electron datasets to in-depth investigations of the Earth’s radiation belt electron dynamics.

关键词： cross-satellite calibration high-energy electron flux FengYun-4A Arase

Rational construction of multiple hollow silicalite-1 zeolite with enhanced quasi acidity for robust vapor-phase Beckmann rearrangement

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Nano Research 2023年第5期16卷 7958-7966页

作者： Peng zhang Xianfeng Yi Changjiu Xia Xinxin Peng Shuai zhang Chengxiang Li Anmin Zheng xiaoxin zhang Yibin Luo Lifeng Cui Fuhong Yu Xingtian Shu State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum ProcessingSINOPECBeijing 100083China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China Shandong Hualu-Hengsheng Chemical Co. Ltd.Dezhou 253024China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Developing efficient and stable zeolites for vapor-phase Beckmann rearrangement of cyclohexanone oxime is still a great challenge to realizeε-caprolactam(CPL)green production.In this work,the hierarchical porous silicalite-1 zeolites with multiple hollow structure(S-1-M)are explored by in-situ desilication−recrystallization post-treatment of spongy highway-like zeolites(S-1-S),which are synthesized through silanization synthesis of conventional bulky silicalite-1(S-1).Compared to S-1,S-1-M achieves superior catalytic performance,with improving the CPL selectivity from 85.7%to 94.1%and prolonging the catalyst lifetime from 74 to 126 h at a weight hourly space velocity(WHSV)of 6 h^(−1).Comprehensive physiochemical studies demonstrate that the highly dispersed intracrystalline cavities within S-1-M endow greater mass diffusion and better quasi acidity inducing by the enhanced H-bonds among abundant H-bonded silanols,which is cooperatively responsible for its superior catalytic performance.

关键词： hollow silicalite-1 H-bonded silanols quasi acidity vapor-phase Beckmann rearrangement

Interaction between neutrophil extracellular traps and cardiomyocytes contributes to atrial fibrillation progression

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Signal Transduction and Targeted Therapy 2023年第8期8卷 3849-3861页

作者： Li He Ruiqi Liu Honghua Yue xiaoxin zhang Xiaohui Pan Yutao Sun Jun Shi Guonian Zhu Chaoyi Qin Yingqiang Guo Department of Cardiovascular Surgery and Cardiovascular Surgery Research Laboratory West China HospitalSichuan UniversityChengdu 610041 SichuanChina Department of Plastic and Burn Surgery West China HospitalSichuan UniversityChengduChina West China Center of Excellence for Pancreatitis Institute of Integrated Traditional Chinese and Western MedicineWest China HospitalSichuan UniversityChengduChina Department of Endocrinology&Metabolism West China HospitalSichuan UniversityChengduChina Department of Pulmonary and Critical Care Medicine and Institute of Respiratory Health West China HospitalSichuan UniversityChengduChina

Atrial fibrillation(AF)is a frequent arrhythmia associated with cardiovascular morbidity and mortality.Neutrophil extracellular traps(NETs)are DNA fragments with cytoplasm proteins released from neutrophils,which are involved in various cardiovascular diseases.To elucidate the role of NETs in AF,we investigated the effect of NETs on AF progression and the secretion of NETs in AF.Results showed that:NETs induced the autophagic apoptosis of cardiomyocytes,and NETs also led to mitochondrial injury by promoting mitochondrial depolarization and ROS production.Ongoing tachy-pacing led to the structural loss of cardiomyocytes and provided potent stimuli to induce NETs secretion from neutrophils.In the meanwhile,increased Ang II in AF facilitated NETs formation through the upregulation of AKT phosphorylation,while it could not directly initiate NETosis as the autophagy was not induced.In vivo,DNase I was administrated to abrogate NETs formation,and AF-related fibrosis was ameliorated as expected.Correspondingly,the duration of the induced AF was reduced.Our study addresses the formation mechanism of NETs in AF and demonstrates the lethal effects of NETs on cardiomyocytes through the induction of mitochondrial injury and autophagic cell death,which comprehensively describes the positive feedback comprised of NETs and stimuli secreted by cardiomyocytes that sustains the progression of AF and AF related fibrosis.

关键词： cardiomyocytes fibrillation cardiovascular

Advances in component and operation optimization of solid oxide electrolysis cell

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Chinese Chemical Letters 2023年第5期34卷 155-164页

作者： xiaoxin zhang Bo Liu Yanling Yang Jianhui Li Jian Li Yingru Zhao Lichao Jia Yifei Sun College of Energy Xiamen UniversityXiamen 361102China School of Materials Science and Engineering State Key Lab of Materials Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and EstersCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518057China

Considering the earth powered by intermittent renewable energy in the coming future,solid oxide electrolysis cell(SOEC)will play an indispensable role in efficient energy conversion and storage on demand.The thermolytic and kinetic merits grant SOEC a bright potential to be directly integrated with electrical grid and downstream chemical synthesis process.Meanwhile,the scientific community are still endeavoring to pursue the SOEC assembled with better materials and operated at a more energy-efficient way.In this review article,at cell level,we focus on the recent development of electrolyte,cathode,anode and buffer layer materials for both steam and CO_(2)electrolysis.On the other hand,we also discuss the next generation SOEC operated with the assistant of other fuels to further reduce the energy consumption and enhance the productivity of the electrolyzer.And stack level,the sealant,interconnect and stack operation strategies are collectively covered.Finally,the challenges and future research direction in SOECs are included.

关键词： Solid oxide electrolysis cell Fuel assistant Stack Operation condition Anode Cathode

Sawtooth and dune auroras simultaneously driven by waves around the plasmapause

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Earth and Planetary Physics 2023年第2期7卷 237-246页

作者： Fei He ZhongHua Yao BinBin Ni Xing Cao ShengYi Ye RuiLong Guo JinXing Li ZhiPeng Ren XinAn Yue YongLiang zhang Yong Wei xiaoxin zhang ZuYin Pu Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China Institute of Space Sciences Shandong UniversityWeihai Shandong 264209China Department of Atmospheric and Oceanic Sciences University of CaliforniaLos AngelesCaliforniaUSA Johns Hopkins University Applied Physics Laboratory LaurelMaryland 20723USA Key Laboratory of Space Weather National Center for Space WeatherChina Meteorological AdministrationBeijing 100081China Institute of Space Physics and Applied Technology Peking UniversityBeijing 100871China

The dune aurora,at a scale of~30 kilometers,was reported recently using ground camera.The small-scale dune aurora occurs on the duskside and exhibits a monochromatic oscillation in the auroral emission,implying fundamental energy conversions.However,whether the dune auroras correspond to atmospheric waves or are associated with magnetospheric dynamics should be determined.This paper reports a dune aurora that occurred during a storm;further,we demonstrate that it was the substructure of the sawtooth aurora that was generated by plasmapause surface waves.Conjugate observations in the magnetospheric source region suggest that the exohiss waves,which are periodically modulated by the plasmapause surface wave-excited ultralow frequency wave,might be responsible for the generation of the dune aurora.Most reported dune aurora events have occurred simultaneously with sawtooth auroras,suggesting that both are plasmapause-driven cross-scale auroral structures.

关键词： sawtooth aurora dune aurora plasmapause surface wave exohiss

Preparation,characterization and biological properties of a novel bone block composed of platelet rich fibrin and a deproteinized bovine bone mineral

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Fundamental Research 2022年第2期2卷 321-328页

作者： Mengge Feng Yulan Wang Yan Wei xiaoxin zhang Leyi Xiao Zijjian Gong Masako Fujioka-Kobayashi Anton Sculean Richard J Miron Scott Froum Yufeng zhang The State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei MOST)&Key Laboratory of Oral Biomedicine Ministry of Education School&Hospital of StomatologyWuhan University Department of Oral and Mxillfacial Surgery The Nippon Dental University School of Life Dentistry at TokyoTokyoJapan Department of Periodontology University of BernBernSwitzerland Clinical Assistant Professor State University of New York Story Brook Department of PeriodontologyPrivate Practice New YorkNew YorkUSA Medical Research Institute School of MedicineWuhan UniversityWuhan 430071China

Alveolar bone defects caused by tooth loss often lead to challenges in implant dentistry,with a need for development of optimal bone biomaterials to predictably rebuild these tissues.To address this problem,we fabricated a novel bone block using platelet-rich fibrin(PRF)and Deproteinized Bovine Bone Mineral(DBBM),and characterized their mechanical and biological properties.The bone block was prepared by mixing DBBM,Liquid-PRF,and Solid-PRF fragments in various combinations as follows:(1)BLOCK-1 made with Solid-PRF fragments+DBBM,(2)BLOCK-2 made with Liquid-PRF+DBBM,(3)BLOCK-3 made with Solid-PRF fragments+Liquid-PRF+DBBM.The time for solidification and the degradation properties were subsequently recorded.Scanning electron microscopy(SEM)and tensile tests were carried out to investigate the microstructure and mechanical properties of each block.The bioactivity of the three groups towards osteoblast differentiation was also evaluated by culturing cells with the conditioned medium from each of the three groups including cell proliferation assay,cell migration assay,alkaline phosphatase(ALP)staining,and alizarin red staining(ARS),as well as by real-time PCR for genes encoding runt-related transcription factor 2(RUNX2),ALP,collagen type I alphal(COLIv41)and osteocalcin(OCN).BLOCK-3 made with Solid-PRF fragments+Liquid-PRF+DBBM had by far the fastest solidification period(over a 10-fold increase)as well as the most resistance to degradation.SEM and tensile tests also revealed that the mechanical properties of BLOCK-3 were superior in strength when compared to all other groups and further induced the highest osteoblast migration and osteogenic differentiation confirmed by ALP,ARS and real-time PCR.PRF bone blocks made through the combination of Solid-PRF fragments+Liquid-PRF+DBBM had the greatest mechanical and biological properties when compared to either used alone.Future clinical studies are warranted to further support the clinical application of PRF bone blocks in bone regeneration procedures.

关键词： Blood Platelet-rich fibrin Bone formation Dental implant Regeneration

A New Post-hoc Flat Field Measurement Method for the Solar X-Ray and Extreme Ultraviolet Imager Onboard the FengYun-3E Satellite

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Research in Astronomy and Astrophysics 2022年第10期22卷 1-10页

作者： Qiao Song Xianyong Bai Bo Chen Xiuqing Hu Yajie Chen Zhenyong Hou Xiaofan zhang Lingping He Kefei Song Peng zhang Jing-Song Wang xiaoxin zhang Weiguo Zong Jinping Dun Hui Tian Yuanyong Deng Key Laboratory of Space Weather National Satellite Meteorological Center(National Center for Space Weather)China Meteorological AdministrationBeijing 100081China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China Innovation Center for Fengyun Meteorological Satellite China Meteorological AdministrationBeijing 100081China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites National Satellite Meteorological Center(National Center for Space Weather)China Meteorological AdministrationBeijing 100081China School of Earth and Space Sciences Peking UniversityBeijing 100871China

Extreme ultraviolet(EUV)observations are widely used in solar activity research and space weather forecasting since they can observe both the solar eruptions and the source regions of the solar wind.Flat field processing is indispensable to remove the instrumental non-uniformity of a solar EUV imager in producing high-quality scientific data from original observed data.FengYun-3E(FY-3E)is a meteorological satellite operated in a Sunsynchronous orbit,and the routine EUV imaging data from the Solar X-ray and Extreme Ultraviolet Imager(X-EUVI)onboard FY-3E has the characteristic of concentric rotation.Taking advantage of the concentric rotation,we propose a post-hoc flat field measurement method for its EUV 195A channel in this paper.This method removes the small-scale and time-varying component of coronal activities by taking the median value for each pixel along the time axis of a concentric rotation data cube,and then derives the large-scale and invariable component of the quiet coronal radiation,and finally generates a flat field image.The flat field can be generated with cadences from hundreds of minutes(one orbit)to several days.Higher flat field accuracy can be achieved by employing more data.Further analysis shows that our method is able to measure the instrumental spot-like nonuniformity possibly caused by contamination on the detector,which mostly disappears after the in-orbit selfcleaning process.It can also measure the quasi-periodic grid-like non-uniformity,possibly from the obscuration of the support mesh on the rear filter.After flat field correction,these instrumental non-uniformities from the original data are effectively removed.Moreover,the X-EUVI 195A data after dark and flat field corrections are consistent with the 193A imaging data from the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory,verifying the suitability of the method.The post-hoc method does not occupy observation time,which is advantageous for space weather operations.Our method is not only suitable for FY-3E/X-E

关键词： Sun corona-techniques image processing-methods data analysis-methods observational

Microstructure characteristics of 12Cr ferritic/martensitic steels with various yttrium

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Journal of Rare Earths 2019年第5期37卷 547-554页

作者： Yingxue Chen Feifei zhang Qingzhi Yan xiaoxin zhang Zhiyuan Hong Institute of Nuclear Materials School of Materials Science and Engineering University of Science and Technology Beijing Department of Reactor Engineering and Safety Research Center China Nuclear Power Technology Research Institute Advanced Energy Research Center Shenzhen University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University

12Cr ferritic/martensitic steels with 0, 0.1 wt%, 0.2 wt% and 0.3 wt% theoretical yttrium(Y) additions were fabricated by vacuum inducting melting and casting method. Solubilities of Y in the 12Cr steels are0.027, 0.078 and 0.17 for 12Cr-0.1 Y, 12Cr-0.2 Y and 12Cr-0.3 Y, respectively. Phase transformations and microstructure characteristics under different heat-treatment schedules were investigated. The starting temperature of ferrite-to-austenite transformation A^(c1) are maintained about 850℃, but the finishing temperature of ferrite-to-austenite transformation A^(c3) are about 950, 970, 980 and 1000℃ for 12Cr-0 Y,12Cr-0.1 Y, 12Cr-0.2 Y and 12Cr-0.3 Y, respectively, which indicates that A^(c3) increases gradually with the addition of Y. Martensite accompanied with a few δ-ferrite is the dominant structure in all the steels. The amount of δ-ferrite shows a strong dependence with the Y content and austenitizing temperature. Area fraction of δ-ferrite increases with the content of Y, which is the ferrite favouring element. The minimum amount of δ-ferrite are achieved at 950℃ for 12Cr-0 Y, 12Cr-0.1 Y, 12Cr-0.2 Y and 1000℃ for 12Cr-0.3 Y.Besides, more carbides precipitate along the martensite laths and grain boundaries in the Y-bearing steel due to the redistribution of carbon between austenite and ferrite resulting from the ferrite favouring element of Y.

关键词： 12Cr ferritic/martensitic steel Yttrium Casting Phase transformation Microstructure characteristics Rare earths

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血浆基质在牙槽嵴保存术中的应用

口腔疾病防治 2024年第3期32卷 161-168页

作者：张玉峰张晓欣武汉大学口腔医院种植科武汉大学口腔医学院口腔基础医学省部共建国家重点实验室培育基地口腔生物医学教育部重点实验室

拔牙后，牙槽嵴软硬组织会发生明显吸收，牙槽嵴保存术目标在于尽量维持牙槽嵴软硬组织体积与形态，为种植体的植入提供适当条件。目前牙槽嵴保存术拔牙窝的多种分类方式存在难以直接指导移植材料的选择和临床操作、颗粒状骨替代材料空... 详细信息

拔牙后，牙槽嵴软硬组织会发生明显吸收，牙槽嵴保存术目标在于尽量维持牙槽嵴软硬组织体积与形态，为种植体的植入提供适当条件。目前牙槽嵴保存术拔牙窝的多种分类方式存在难以直接指导移植材料的选择和临床操作、颗粒状骨替代材料空间维持能力不足导致成骨效果不佳等问题。血浆基质是一种自体血液提取物，能有效提高组织再生效果。本文阐述了拔牙后软硬组织丧失的特点及血浆基质在牙槽嵴保存术中的主要应用形式（液态血浆基质、固态血浆基质膜/塞、血浆基质骨块），对需要进行牙槽嵴保存术的牙槽窝进行了新的分类，并就应用血浆基质行牙槽嵴保存术的临床操作方法进行推荐：第一类为拔牙窝不存在骨组织缺损，伴或不伴软组织缺损；第二类为拔牙窝存在骨组织缺损，双侧骨壁缺损均小于50%，伴或不伴软组织缺损；第三类为拔牙窝存在骨组织缺损，双侧骨壁至少有一侧缺损大于50%，伴或不伴软组织缺损。在第一类拔牙窝中可填入固态血浆基质膜或组织塞，再次注射液态血浆基质，双层固态血浆基质膜封闭拔牙窝；在第二类拔牙窝中可填入血浆基质骨块，注射液态血浆基质二次固化后，使用可吸收胶原膜及双层固态血浆基质膜关闭拔牙窝；在第三类拔牙窝中利用帐篷钉维持高度，再植入血浆基质骨块，注射液态血浆基质二次固化后，使用可吸收胶原膜及双层固态血浆基质膜关闭拔牙窝。本文旨在为口腔临床医师全面了解血浆基质、简化牙槽嵴保存术临床决策及操作提供参考。

关键词：种植治疗硬组织缺损软组织缺损拔牙窝分类牙槽嵴保存血浆基质液态血浆基质固态血浆基质膜血浆基质骨块临床决策

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