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Top priority current path between SiC particles during ultra-high temperature flash sintering: Presence of PyC “bridges”

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Journal of Advanced Ceramics 2024年第2期13卷 255-262页

作者： Le Lu tianlong Liu Zhaofeng Chen Fei Wang Mengmeng Yang Qiong wu Lixia Yang Huanyong Li International Laboratory for Insulation and Energy Efficiency Materials College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 211106China State Key Laboratory of Solidification Processing School of Materials and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Flash sintering(FS)is a novel technique for rapidly densifying silicon carbide(SiC)*** work achieved a rapid sintering of SiC ceramics by the utilization of ultra-high temperature flash sintering within 60 *** carbon(PyC)“bridges”were constructed between SiC particles through the carbonisation of phenolic resin,providing a large number of current *** incubation time of the flash sintering process was significantly reduced,and the sintering difference between the centre and the edge regions of the ceramics was minimized,with an average particle size of the centre region and edge region being 12.31 and 9.02μm,*** results showed that the porosity of the SiC ceramics after the flash sintering was reduced to 14.79% with PyC“bridges”introduced,and the Vickers hardness reached 19.62 ***“bridges”gradually evolved from amorphous eddy current carbon to oriented graphite carbon,indicating that the ultra-high temperature environment in which the sample was located during the flash sintering was successfully ***-high temperature flash sintering of SiC is expected to be applied to the local repair of matrix damage in SiC ceramic matrix composites.

关键词： silicon carbide(SiC) flash sintering(FS) pyrolytic carbon(PyC)"bridges" current path instantaneous

High special surface area and“warm light”responsive ZnO:Synthesis mechanism,application and optimization

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Bioactive Materials 2022年第1期7卷 181-191页

作者： Xinxin Miao Fen Yu Kuan Liu Zhongsheng Lv Jianjian Deng tianlong wu Xinyan Cheng Wei Zhang Xigao Cheng Xiaolei Wang Department of Orthopaedic Surgery The Second Affiliated Hospital of Nanchang UniversityNanchangJiangxi330006PR China College of Chemistry NanChang UniversityNanChangJiangxi330031PR China Institute of Translational Medicine Nanchang UniversityNanchangJiangxi330031PR China Jiangxi Key Laboratory of Nanobiomaterials Institute of Advanced MaterialsEast China Jiaotong UniversityNanchangJiangxi330013PR China

In this study,a new series of zinc oxide(ZnO)with high specific surface area and narrow energy band gap are prepared using a facile microwave-induced *** corresponding formation mechanism is also discussed for the first *** to the introduction of C,these ZnO can be excited by long wave temperature light without harmful short wave radiation,and play an efficient photocatalytic *** valuable property fundamentally improves the biological safety of its photocatalytic ***,taking teeth whitening as an example,the photocatalytic performance of ZnO is ***“pure”yellow light-emitting diode(PYLED)with high biological safety is used as the excitation *** is found that this method could effectively remove pigment on the tooth surface through physical *** addition,these ZnO could generate active oxygen to degrade the pigment on the tooth surface under the irradiation of yellow *** further optimization of these“warm light”responsive ZnO is also discussed in this systematical study,which could open up new opportunities in biomedical field.

关键词： ZnO Photocatalysis Yellow light Teeth whitening

A lightweight and high compressive resistance thermal insulation material with dual-network structure

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Nano Research 2024年第5期17卷 4279-4287页

作者： Mengmeng Yang Zhaofeng Chen Yang Ding wu Qiong tianlong Liu Manna Li Lixia Yang Sheng Cui School of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech UniversityNanjing 211816China

Ceramic fibrous aerogels are highly desirable for thermal management materials due to their high porosity,excellent elasticity,thermal conductivity,and good thermal ***,the fabrication of nanofibrous aerogel with super-elasticity and good shape retention at the same time has remained *** meet the requirements,a novel anisotropy nanofibrous-granular aerogel with a quasi-layered multi-arch-like and hierarchical-cellular structure is designed and prepared by vacuum-filtration-assisted freeze-drying and *** quasi-layered multi-arch and flexible nanofibers endowed the aerogels with excellent mechanical robustness(ultimate stress up to 60 kPa with strain 60%)and super-elasticity with recoverable compression strain up to 60%.The introduced SiO_(2) aerogel nanoparticles and nanofibers are assembled into an arch-like structure and become the connection point of adjacent nanofibers,which endows low thermal conductivity(0.024 mW/(m·K))of composite *** novel strategy provides a fresh perspective for the preparation of nanofibrous aerogel with robust mechanical in thermal insulation and other fields.

关键词： nanofibrous aerogel dual-network structure thermal insulation nanofibrous-granular composite aerogels strong mechanical

Prevention and treatment of gerbil hepatitis E using the programmable CRISPR-Cas13d system

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Genes & Diseases 2024年第4期11卷 94-97页

作者： Chengcheng Zhao Chong Lia Sa Li Hanyu wu Pengyao Ren tianlong Liu Xiaoxiang Hu Ran Zhang State Key Laboratory of Animal Biotech Breeding College of Biological SciencesChina Agricultural UniversityBeijing 100193China Laboratory of Veterinary Pathology and Nanopathology College of Veterinary MedicineChina Agricultural UniversityBeijing 100193China

In recent years,the global incidence of hepatitis E virus(HEV)has been rising,leading to increased morbidity and mortality associated with ***13,a CRISPR effector,shows promise as an antiviral agent against singlestranded RNA ***13d,a type VI-D effector,exhibits higher efficiency in suppressing RNA viruses compared to other type VI ***,its in vivo activity against RNA viruses in mammals remains unknown.

关键词： mortality hepatitis treatment

Characteristics of rural domestic sewage discharge and their driving mechanisms: evidence from the Northern Region, China

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Frontiers of Environmental Science & Engineering 2024年第7期18卷 47-58页

作者： Jianguo Liu Ziyu Zhou Pengyu Li Zixuan Wang Ying Yan Xuezheng Yu Wenkai Li tianlong Zheng Yingnan Cao Wenjun wu Wenqian Cai Zhining Shi Junxin Liu Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region College of Resources and Environmental EngineeringInner Mongolia University of TechnologyHohhot 010051China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China SCEGC No.12 Construction Engineering Group Co. Ltd.Ankang 725000China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing 100041China Technical Centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China Sustainable Infrastructure and Resource Management(SIRM) UniSA STEMUniversity of South AustraliaSouth AustraliaMawson LakesSA 5095Australia

The traits of rural domestic sewage emission are unclear,negatively affecting rural domestic sewage treatment and sewage *** study used data from the Second National Pollution Source Census Bulletin to establish a data *** spatial distribution characteristics and main factors influencing rural sewage discharge in the Northern Region were studied using spatial autocorrelation analysis and structural *** findings demonstrated that(l)a significant Spearman correlation between drainage water volume(DwV),chemical oxygen demand(COD),ammonia nitrogen(NH_(3)-N),total nitrogen(TN),and total phosphorus(TP)and that the correlation coefficients between DWV and COD,NH,-N,TNand TP were 0.87**,1.0**,0.99**,0.99**,respectively;(2)rural sewage discharge showed spatial autocorrelation,and rural domestic sewage discharge in the districts and counties with an administration was significantly higher than in the surrounding areas;and(3)social development was the main driver rural domestic sewage changes(path coefficient was 0.407**),and the main factors influencing rural domestic sewage discharge were the urbanization rate,years of education,and population age *** study obtained the spatial variation law and clarified the main influencing factors of rural domestic sewage to provide data support and a theoretical basis for subsequent rural sewage collection and *** of the Inner Mongolia Autonomous Region in northern China as a typical case,provides a theoretical foundation for scientific decision-making on rural domestic sewage treatment at the national and regional levels and offers new perspectives for managing pollutants.

关键词： Rural domestic sewage Emission characteristics Spatial autocorrelation analysis Influencing factors

AtMYB103 is a crucial regulator of several pathways affecting Arabidopsis anther development

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Science China(Life Sciences) 2010年第9期53卷 1112-1122页

作者： ZHU Jun ZHANG GuoQiang CHANG YuHua LI XiaoChuan YANG Jun HUANG XueYong YU QingBo CHEN Hui wu tianlong YANG ZhongNan College of Agriculture and Biotechnology Shanghai Jiao Tong UniversityShanghai 200240China College of Life and Environmental Sciences Shanghai Normal UniversityShanghai 200234China Shanghai Institute of Plant Physiology and Ecology Chinese Academy of SciencesShanghai 200032China

Previous reports indicated that AtMYB103 has an important role in tapetum development,callose dissolution,and exine formation in *** ***,we further characterized its function in anther development by expression pattern analysis,transmission electron microscopy observation of the knockout mutant,and microarray analysis of downstream genes.A total of 818 genes differentially expressed between ms188 and the wild-type were identified by global expression profiling *** classification showed that loss-of-function of AtMYB103 impairs cell wall modification,lipid metabolic pathways,and signal transduction throughout anther *** in situ hybridization confirmed that transcription factors acting downstream of AtMYB103 (At1g06280 and At1g02040) were expressed in the tapetum and microspores at later stages,suggesting that they might have important roles in *** results indicated that AtMYB103 is a crucial regulator of Arabidopsis anther development.

关键词： Arabidopsis AtMYB103 tapetum development transcription factor microarray

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菜用大豆新品种‘交大11’

园艺学报 2022年第S1期49卷 91-92页

作者：滕达王彪马晓红姚陆铭武天龙东北农业大学农学院哈尔滨150030 上海交通大学农业与生物学院上海202400

‘交大11’是以‘台292’×‘交大2号’的F_(1)作母本,以‘台75’×‘交大08-3’的F_(1)为父本进行有性杂交,采用混合选择的方法,经过1次南繁,连续4代自交选育而成。有限结荚习性,有效荚数21.7个,标准荚数14.3个,标准荚长5.88 cm、宽1.4... 详细信息

‘交大11’是以‘台292’×‘交大2号’的F_(1)作母本,以‘台75’×‘交大08-3’的F_(1)为父本进行有性杂交,采用混合选择的方法,经过1次南繁,连续4代自交选育而成。有限结荚习性,有效荚数21.7个,标准荚数14.3个,标准荚长5.88 cm、宽1.40 cm。每kg标准荚数304.1个,单株荚质量59.70 g,鲜百粒质量84.88 g,稳定高产。

关键词：菜用大豆选育品种

Angle-resolved photoemission study of NbGeSb with non-symmorphic symmetry

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Chinese Physics B 2024年第2期33卷 464-470页

作者：马欢谭宁吴徐传李满王义炎路洪艳夏天龙王善才 Department of Physics Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education)Renmin University of ChinaBeijing 100872China Beijing Key Laboratory of Opto-Electronic Functional Materials&Micro-Nano Devices Renmin University of ChinaBeijing 100872China School of Information Network Security People’s Public Security University of ChinaBeijing 100038China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China School of Physics and Physical Engineering Qufu Normal UniversityQufu 273165China

We investigate the electronic structure of NbGeSb with non-symmorphic *** employ angle-resolved photoemission spectroscopy(ARPES)to observe and identify the bulk and surface states over the Brillouin *** utilizing high-energy photons,we identify the bulk Fermi surface and bulk nodal line along the direction X–R,while the Fermi surface of the surface state is observed by using low-energy *** observe the splitting of surface bands away from the high-symmetry point *** density functional theory calculations on bulk and 1 to 5-layer slab models,as well as spin textures of NbGeSb,verify that the band splitting could be attributed to the Rashba-like spin–orbit coupling caused by space-inversion-symmetry breaking at the *** splitted surface bands cross with each other,forming two-dimensional Weyl-like crossings that are protected by mirror *** findings provide insights into the two-dimensional topological and symmetry-protected band inversion of surface states.

关键词： non-symmorphic symmetry nodal line splitting of surface bands angle-resolved photoemission spectroscopy

Ramet population ecology of Panicum virgatum in the field–Competitively random growth of ramets and foraging behavior of ramet populations

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Progress in Natural Science:Materials International 2008年第7期18卷 901-906页

作者： Xinguo Yang a,*, tianlong wu b, Xu Chengb a College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, P.R. China b College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, P.R. China College of Resources and Environmental Sciences China Agricultural University Beijing 100193 P.R. China College of Agriculture and Biotechnology China Agricultural University Beijing 100193 P.R. China

The authors investigated the heterogeneous size patterns and dynamic growth of the ramet population of Panicum virgatum, a clonal caespitose plant, limited to the space occupied by a ramet bunch and the time of the ramet yearly life cycle, to understand the ecology of clonal caespitose plants in the field, where the ramet bunch generally consisted of more than one genet. Dynamic life tables for ramet populations were established by the replacement of living ramets at the present time with "dead" ones in past time. These tables revealed stable coexisting patterns of isometric and allometric growing processes of ramets in mass and height respectively, which approximately followed the historic trajectory of a density-independent population. The ecology of clonal caespitose plants is further discussed based on the competitively random growth of ramet individuals, including the scale of foraging behavior. In the field, the ramet population ecol- ogy of switchgrass may be a statistical result of competitively random growth of ramet individuals. The foraging behavior of a ramet population could then be presented as a process in which ramet individuals competed with each other for light and grew randomly, while at the same time a relatively stable dynamic growth pattern was apparent at the level of the ramet population, and the functional leaves were placed properly in time and space.

关键词： Caespitose clone Ramet population Panicum virgatum Life table Phenotypic plasticity Foraging behavior