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Geant4 simulation of plastic scintillators for a prototype μSR spectrometer

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Nuclear Science and Techniques 2013年第4期24卷 50-56页

作者： XU Wenzhen LIU Yanfen TAN Zongquan XIAO Ran kong Wei YE Bangjiao State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China

The experimental muon source on China Spallation Neutron Source(CSNS) is expected to be a high intensity(105μ+/s) surface muon source with a small beam spot of 4-cm *** a practical application of this muon source,we are devoting to develop the first pulsed μSR spectrometer in *** this paper,the performance of plastic scintillators in the μSR spectrometer is studied by Monte Carlo *** processes such as positron energy deposition,scintillation photons production,light propagation and photon-electron conversion are carefully *** to the results,an optimal dimension of the plastic scintillator is proposed using for our future spectrometer,which has a long-strip shape with the dimension variation range of 50–60 mm length,5–8 mm height,and 10–12 mm ***,we can build a spectrometer with a count rate up to 104e+/s by 100–120 forward and backward segmental detectors in *** simulation could serve as an important guide for spectrometer construction.

关键词：塑料闪烁体光谱仪 GEANT4 SR 模拟散裂中子源原型闪烁光子

In-situ construction of amorphous/crystalline contact Bi_(2)S_(3)/Bi_(4)O_(7) heterostructures for enhanced visible-light photocatalysis

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Chinese Chemical Letters 2021年第8期32卷 2539-2543页

作者： Feihu mu Benlin Dai Wei Zhao Xiaofan Yang Xiaolong Zhao Xujing Guo Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental ProtectionSchool of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian 223300China Department of Mechanical Engineering The University of Hong KongHong KongChina College of Resources and Environment Chengdu University of Information TechnologyChengdu 610225China

Constructing a heterojunction photocatalyst is a significant method to enhance photocatalytic activity because it can promote the separation of photogene rated ***,amorphous/crystalline contact Bi_(2)S_(3)/Bi_(4)0_(7) heterostructure was successfully synthesized by in-situ sulfidation of *** amorphous Bi_(2)S_(3) is diffused on the surface of Bi_(4)0_(7) rod,enhancing the visible light response and improving the transport of photogene rated *** characterizations confirm that the rapid separation of photogene rated carriers leads to increased photocatalytic *** optimized Bi_(2)S_(3)/Bi_(4)O_(7) heterostructure photocatalyst(BiS-0.15) exhibits the highest Cr(Ⅵ) reduction(0.01350 min^(-1)) and RhB oxidation(0.08011 min^(-1)) activity,which is much higher than that of pure Bi_(4)0_(7) and mixture under visible light *** work provides new insights into the construction of efficient novel photocatalysts.

关键词： Photocatalysis Cr(Ⅵ)reduction Heterojunction Bismuth-based oxide Bismuth-based sulfide

Application of ultra-sonication, acid precipitation and membrane filtration for co-recovery of protein and humic acid from sewage sludge

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Frontiers of Environmental Science & Engineering 2016年第2期10卷 327-335页

作者： Liangliang WEI Kun WANG Xiangjuan kong Guangyi LIU Shuang CUI Qingliang ZHAO Fuyi CUI Key Laboratory of Songliao Aquatic Environment (Ministry of Education) Jilin Jianzhu University Changchun 130118 China School of mu-nicipal & Environmental Engineering Harbin Institute of Technology Harbin 150090 China Center of Science & Technology of Construction of the Ministry of Housing and Urban Rural Development of E R. China Beijing 100835 China Procter & Gamble Company Guangzhou 510620 China

A novel method was applied to co-recover proteins and humic acid from the dewatered sewage sludge for liquid fertilizer and animal feed. The proteins in sewage sludge were first extracted using the processes of ultra- sonication and acid precipitation, and then the humic acid was recovered via membrane filtration. The extraction efficiency was 125.9mg humic acid-gWSS volatile suspended solids （VSS） and 123.9 mg proteins-g-1 VSS at the optimal ultrasonic density of 1.5 W·mL-1. FT-IR spectrum results indicated that the recovered proteins and humic acid showed similar chemical characteristic to the natural proteins and humic acid. The acidic solution （pH 2） could be recycled and used more than 10 times during the co-recovery processes. In addition, the dewatered sludge could be easily biodegraded when the humic acid and proteins are extracted, which was essential for further utilization. These findings are of great significance for recovering valuable nutrient fi＇om sewage sludge.

关键词： sewage sludge co-recovery proteins humicacid recycling biodegradation rate

Molecular characteristics,immune evasion,and impact of SARS-CoV-2 variants

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Signal Transduction and Targeted Therapy 2022年第7期7卷 2423-2447页

作者： Cong Sun Chu Xie Guo-Long Bu Lan-Yi Zhong mu-Sheng Zeng State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer MedicineDepartment of Experimental ResearchSun Yat-sen University Cancer CenterSun Yat-sen University510060 GuangzhouChina Guangdong-Hong kong Joint Laboratory for RNA Medicine 510060 GuangzhouChina

The persistent COVID-19 pandemic since 2020 has brought an enormous public health burden to the global society and is accompanied by various evolution of the virus *** consistently emerging SARS-CoV-2 variants harboring critical mutations impact the molecular characteristics of viral proteins and display heterogeneous behaviors in immune evasion,transmissibility,and the clinical manifestation during infection,which differ each strain and endow them with distinguished features during populational *** SARS-CoV-2 variants,identified as Variants of Concern(VOC)by the World Health Organization,challenged global efforts on COVID-19 control due to the rapid worldwide spread and enhanced immune evasion from current antibodies and ***,the recent Omicron variant even exacerbated the global anxiety in the continuous *** significant evasion from current medical treatment and disease control even highlights the necessity of combinatory investigation of the mutational pattern and influence of the mutations on viral dynamics against populational immunity,which would greatly facilitate drug and vaccine development and benefit the global public health *** in this review,we summarized the molecular characteristics,immune evasion,and impacts of the SARSCoV-2 variants and focused on the parallel comparison of different variants in mutational profile,transmissibility and tropism alteration,treatment effectiveness,and clinical manifestations,in order to provide a comprehensive landscape for SARS-CoV-2 variant research.

关键词： immunity characteristics impact

Intercalation and hybrid heterostructure integration of two-dimensional atomic crystals with functional organic semiconductor molecules

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Nano Research 2020年第11期13卷 2917-2924页

作者： Wen He Han Zang Songhua Cai Zhangyan mu Cheng Liu Mengning Ding Peng Wang Xinran Wang Key Laboratory of Mesoscopic Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing210093China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China Department of Applied Physics The Hong Kong Polytechnic UniversityHung Hom999077KowloonHong KongChina Research Center for Environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing210023China

Van der Waals(vdW)integration affords semiconductor heterostructures without constrains of lattice matching and opens up a new realm of functional devices by design.A particularly interesting approach is the electrochemical intercalation of two-dimensional(2D)atomic crystal and formation of superlattices,which can provide scalable production of novel vdW ***,this approach has been limited to the use of organic cations with non-functional aliphatic chains,therefore failed to take the advantage of the vast potentials in molecular functionalities(electronic,photonic,magnetic,etc.).Here we report the integration of 2D crystal(MoS_(2),WS_(2),highly oriented pyrolytic graphite(HOPG),WSe_(2) as model systems)with electrochemically inert organic molecules that possess semiconducting characteristics(including perylene-3,4,9,10-tetracarboxylic dianhydride(PTCDA),pentacene and fullerene),through on-chip electrochemical *** unprecedented long-range spatial feature of intercalation has been achieved,which allowed facile assembly of a vertical MoS_(2)-PTCDA-Si *** intercalated heterostructure shows significant modulation of the lateral transport,and leads to a molecular tunneling characteristic at the vertical *** general intercalation of charge neutral and functional molecules defines a versatile platform of inorganic/organic hybrid vdW heterostructures with significantly extended molecular functional building blocks,holding great promise in future design of nano/quantum devices.

关键词： transition metal dichalcogenide electrochemical intercalation perylene-3,4,9,10-tetracarboxylic dianhydride(PTCDA) organic semiconductor inorganic/organic heterostructure

中国式现代农业经营体系的构建逻辑、政策创新与重大意义

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教学与研究 2024年第6期 83-94页

作者：穆娜娜孔祥智重庆师范大学经济与管理学院重庆401331 中国人民大学农业与农村发展学院北京100872

现代农业经营体系是实现中国式农业现代化的必要手段。党的十八大以来,在习近平新时代中国特色社会主义思想指引下,面对“谁来种地”的难题,以“三权分置”改革为制度保障,中国初步形成了以家庭农场为基础、农民合作社为中坚、农业产业... 详细信息

现代农业经营体系是实现中国式农业现代化的必要手段。党的十八大以来,在习近平新时代中国特色社会主义思想指引下,面对“谁来种地”的难题,以“三权分置”改革为制度保障,中国初步形成了以家庭农场为基础、农民合作社为中坚、农业产业化龙头企业为骨干、农业社会化服务组织为支撑,引领带动小农户发展的立体式复合型现代农业经营体系。通过培育壮大新型农业经营主体,以及促进小农户与现代农业发展有机衔接等方面的政策创新,该经营体系在巩固完善中国农村基本经营制度、促进农业节本提质增效和农民增收,以及保障中国粮食安全和重要农产品供给等方面发挥了重要作用,并对促进中国特色农业现代化实践产生了深远影响。

关键词：中国式农业现代化现代农业经营体系新型农业经营主体小农户

Building on the backbone of CD47-based therapy in cancer:Combination strategies,mechanisms,and future perspectives

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Acta Pharmaceutica Sinica B 2023年第4期13卷 1467-1487页

作者： Zi-Han Ye Wei-Bang Yu mu-Yang Huang Jun Chen Jin-Jian Lu State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao 999078China Zhongshan School of Medicine Sun Yat-sen UniversityGuangzhou 510080China Department of Pharmaceutical Sciences Faculty of Health SciencesUniversity of MacaoMacao 999078China MoE Frontiers Science Center for Precision Oncology University of MacaoMacao 999078China Guangdong-Hong kong-Macao Joint Lab on Chinese Medicine and Immune Disease Research University of MacaoMacao 999078China

Described as a“don't eat me”signal,CD47 becomes a vital immune checkpoint in *** interaction with signal regulatory protein alpha(SIRPa)prevents macrophage *** recent years,a growing body of evidences have unveiled that CD47-based combination therapy exhibits a superior anti-cancer *** clinical trials about CD47 have adopted the regimen of collaborating with other therapies or developing CD47-directed bispecific antibodies,indicating the combination strategy as a general trend of the *** this review,clinical and preclinical cases about the current combination strategies targeting CD47 are collected,their underlying mechanisms of action are discussed,and ideas from future perspectives are shared.

关键词： CD47 Combination strategies Bispecific antibodies Clinical data Preclinical data Cancer Mechanisms Future perspectives

合作社农业社会化服务功能的演变逻辑——基于仁发合作社的案例分析

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财贸研究 2019年第8期30卷 64-75页

作者：穆娜娜孔祥智农业农村部规划设计研究院农业发展与投资研究所北京100125 中国人民大学农业与农村发展学院北京100872

以黑龙江省克山县仁发合作社为例,通过案例研究发现:初始阶段降低农机作业服务市场交易成本的需要,会诱使合作社吸收农户以家庭承包耕地入股,而土地统一经营会进一步促使合作社配套提供农资采购等产中服务,最终获得农业社会化服务的规... 详细信息

以黑龙江省克山县仁发合作社为例,通过案例研究发现:初始阶段降低农机作业服务市场交易成本的需要,会诱使合作社吸收农户以家庭承包耕地入股,而土地统一经营会进一步促使合作社配套提供农资采购等产中服务,最终获得农业社会化服务的规模经济效益,解决了“谁来种地”“怎么种地”的问题;随着规模经济到达极限和农业本身自然与市场风险的凸显,合作社一般会继续拓展其在产后与产前等环节的服务,通过产业链延伸来提高农产品附加值,确保合作社及其成员稳定增收,从而促进一二三产业融合,解决农业经济效益低下的问题。

关键词：合作社农业社会化服务交易成本规模经济产业链延伸

Identification of Resistance of Powdery Mildew and Stripe Rust of Winter Wheat Strains in Xinjiang

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Plant Diseases and Pests 2022年第2期13卷 1-4,13页

作者： Wei SANG Pengpeng LIU Yingbin NIE Dezheng kong Fengjuan CUI Xinnian HAN Hongjun XU Peiyuan mu Institute of Crop Research Xinjiang Academy of Agri-Reclamation Sciences/Key Laboratory of Xinjiang Production and Construction Corps for Cereal Quality Research and Genetic ImprovementShihezi 832000China

Wheat powdery mildew and stripe rust are the major diseases in wheat producing area in *** obtain wheat germplasm resources and varieties resistant to powdery mildew and rust,36 high-generation stable strains of Xinjiang winter wheat were evaluated using the method of natural inducement from 2018 to 2020.A total of 5 strains with high resistance to powdery mildew,4 strains with slow stripe rust and 1 strain with resistance to powdery mildew and adult plant slow stripe rust were *** the parental combination of disease-resistant varieties was *** studies will provide theoretical basis for the breeding of resistant wheat varieties in Xinjiang.

关键词： Xinjiang winter wheat strains Powdery mildew Stripe rust Resistance identification