检索结果-南通市图书馆

Magnetoresistance anomaly in Fe_(5)GeTe_(2)homo-junctions induced by its intrinsic transition

Nano Research 2023年第7期16卷 10443-10450页

作者： Ruijie Zhao Yanfei Wu Shaohua Yan Xinjie Liu He Huang Yang Gao mengyuan zhu Jianxin Shen Shipeng Shen Weifeng Xu Zeyu Zhang Liyuan Zhang Jingyan Zhang Xinqi Zheng Hechang Lei Ying Zhang Shouguo Wang School of Materials Science and Engineering Beijing Advanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology BeijingBeijing 100083China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China School of Materials Science and Engineering Anhui UniversityHefei 230601China Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China

Two-dimensional van der Waals(2D vdW)magnets have attracted great attention recently and possess the unprecedented advantages of incorporating high-quality vdW heterostructures and homostructures into spintronic devices,and exploring various physical phenomena or *** them,Fe_(5)GeTe_(2)(F5GT)has ferromagnetic order close to room temperature,however the magnetic properties near its intrinsic transitions and F5GT-based 2D devices remain mostly ***,we systematically demonstrate the peculiar magnetic properties of Fe_(5)GeTe_(2)nanoflakes near its intrinsic transition temperature(Tp)which is far lower than its Curie temperature(TC)of~265 K,and firstly discover anomalous magnetoresistance effect in F5GT homo-junctions by magneto-transport *** strongest anomalous Hall effect occurs around Tp which is located in a temperature range from 130 to 160 K for the F5GT nanoflakes with different ***,negative magnetoresistance(N-MR)and butterfly-shaped magnetoresistance(B-MR)are observed in F5GT homo-junction devices,and they appeared only in an intermediate temperature range from 110 to 160 K,noticeably showing the maxima near the T_(p)rather than the lowest *** experimental results clearly reveal the significant influence of intrinsic transitions on magnetic properties of F5GT and magnetoresistance effect in F5GT homo-junction devices,which imply a new strategy to achieve highperformance 2D spintronic devices by tuning intrinsic magnetic or structural transitions in 2D vdW magnets.

关键词： Two-dimensional(2D)van der Waals magnets Fe_(5)GeTe_(2) homo-junction magnetoresistance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrated genomic and transcriptomic analysis reveals genes associated with plant height of foxtail millet

引用

The Crop Journal 2023年第2期11卷 593-604页

作者： mengyuan zhu Qiang He Mingjie Lyu Tiantian Shi Qian Gao Hui Zhi Huan Wang Guanqing Jia Sha Tang Xiliu Cheng Rui Wanga Andi Xu Haigang Wang Zhijun Qiao Jun Liu Xianmin Diao Ying Gao National Key Facility for Crop Gene Resources and Genetic Improvement(NFCRI) Institute of Crop SciencesChinese Academy of Agricultural Sciences(CAAS)Beijing 100081China Biotechnology Research Institute Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China Chengdu National Agricultural Science and Technology Center Chengdu 610213SichuanChina Center for Agricultural Genetic Resources Research Shanxi Agricultural UniversityTaiyuan 030031ShanxiChina Institute of Germplasm Resources and Biotechnology Tianjin Academy of Agricultural SciencesTianjin 300112China

Foxtail millet(Setaria italica)is an important C4 model crop;however,due to its high-density planting and high stature,lodging at the filling stage resulted in a serious reduction in yield and ***,it is imperative to identify and deploy the genes controlling foxtail millet plant *** this study,we used a semi-dwarf line 263A and an elite high-stalk breeding variety,Chuang 29 to construct an F2 population to identify dwarf *** performed transcriptome analysis(RNA-seq)using internode tissues sampled at three jointing stages of 263A and Chuang 29,as well as bulk segregant analysis(BSA)on their F2 population.A total of 8918 differentially expressed genes(DEGs)were obtained from RNA-seq analysis,and GO analysis showed that DEGs were enriched in functions such as‘‘gibberellin metabolic process”and‘‘oxidoreductase activity”,which have previously been shown to be associated with plant height.A total 593 mutated genes were screened by BSA-seq *** hundred and seventy-six out of the 593 mutated genes showed differential expression levels between the two parental lines,and seven genes not only showed differential expression in two or three internode tissues but also showed high genomic variation in coding regions,which indicated they play a crucial role in plant height *** them,we found a gibberellin biosynthesis related GA20 oxidase gene(Seita.5G404900),which had a single-base at the third exon,leading to the frameshift mutation at *** amplified polymorphic sequence assay and association analysis proved the single-base in Seita.5G404900 co-segregated with dwarf phenotype in two independent F2 populations planted in entirely different *** together,the candidate genes identified in this study will help to elucidate the genetic basis of foxtail millet plant height,and the molecular marker will be useful for marker-assisted dwarf breeding.

关键词： Foxtail millet Plant height Transcriptome analysis Bulk segregant analysis Functional markers Association analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis of Bisboronic Acids and Their Selective Recognition of Sialyl Lewis X Antigen

引用

Chemical Research in Chinese Universities 2018年第3期34卷 415-422页

作者： WANG Yan'en LI Xueyan CHEN Hua zhu mengyuan LI Xiaoliu Key Laboratory of Chemical Biology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 P. R. China College of Science Agricultural University of Hebei Baoding 071001 19. R. China Department of Chemistry and Center for Diagnostics and Therapeutics Georgia State University Atlanta GA 30303 USA

The development of sensors that recognize Lewis oligosaccharides can help the diagnosis and early detection of cancer. Herein, we reported the design and synthesis of a series of anthracene-based bisboronic acids （9a-9e） with different N-substituents near the boronic acid unit. Among them, compound 9a could recognize sialyl Lewis X（sLex） with selectivity over other Lewis sugars, and could significantly stain sLeX-expressing HEPG2 cells with selectivity over the range of 0.1-10 μmol/L. Compound 9a possibly has two properly positioned boronic acids caused by the steric hindrance by the near N-benzyl substituent group, which empower its sLe^x selectivity and higher binding affinity.

关键词： Lewis sugar Bisboronic acid Anthracene-based fluorescent probe Biochemical recognition

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

锌离子电池正极材料的研究进展

引用

化工科技 2024年第2期32卷 67-74页

作者：赵晴朱梦媛丁玉寅樊文琪杨武海刘益辰王存国叶欣刘晓红赵波青岛科技大学橡塑材料与工程教育部重点实验室山东省烯烃催化与聚合重点实验室山东青岛266042 昌邑森汇新材料有限公司山东潍坊261300

锌离子电池由于安全性能好、成本低廉、环境友好等优点,近年引起了广泛关注。对锌离子电池的种类、电池工作原理等进行了简介,重点论述了锌离子电池正极材料的种类和研究进展,尤其是对含锰氧化物、钒类氧化物、普鲁士蓝类、含有羰基类... 详细信息

锌离子电池由于安全性能好、成本低廉、环境友好等优点,近年引起了广泛关注。对锌离子电池的种类、电池工作原理等进行了简介,重点论述了锌离子电池正极材料的种类和研究进展,尤其是对含锰氧化物、钒类氧化物、普鲁士蓝类、含有羰基类的有机正极材料等进行了详述;锌空二次电池、具有共轭结构的含有羰基类的有机正极材料将是未来大容量锌离子电池的研发热点,有望应用于电动汽车动力电池中。提高锌离子电池的工作电压及循环稳定性是目前亟待解决的关键问题,大容量新型电极材料的制备及锌离子电池电解液的研发将成为未来的发展方向。

关键词：锌离子电池正极材料二次电池锌

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spatiotemporal distribution,environmental risk and carbon emission reduction potential of livestock manure in Shaanxi Province,China

引用

Frontiers of Agricultural Science and Engineering 2024年第3期11卷 381-396页

作者： mengyuan QIAO Jianchun zhu Ronghua LI Junting PAN Ran XIAO Hailong WANG Kuok Ho Daniel TANG Zengqiang ZHANG College of Humanities&Social Development Northwest A&F UniversityYangling 712100China College of Natural Resources and Environment Northwest A&F UniversityKey Laboratory of Low-carbon Green Agriculture in Northwestern ChinaMinistry of Agriculture and Rural AffairsYangling 712100China Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and EnvironmentSouthwest UniversityChongqing 400715China Biochar Engineering Technology Research Center of Guangdong Province School of Environmental and Chemical EngineeringFoshan UniversityGuangdong 528000China Department of Environmental Science University of ArizonaTucsonAZ 85721USA

Shaanxi is a leading province in animal husbandry(AH)in ***,the lack of provincial information on the characteristics and utilization potential of livestock manure(LM)hinders crucial management ***,we investigated the spatiotemporal distribution,availability and biogas potential of LM in Shaanxi,and examine the carbon emission reduction potential of *** has been a 1.26-fold increase in LM quantities in Shaanxi over the past 35 years,reaching 4635.6×10^(4)t by *** was mainly concentrated in northern Shaanxi and the eastern part of *** and pig manure were the primary sources of LM,with the average LM land-load of 14.57 t·ha^(−1)in *** the overall AH in Shaanxi has not exceeded the environmental capacity,the actual scales of AH in Ankang and Hanzhong have already surpassed the respective environmental capacities,posing a higher risk of N and P *** 2021,the estimated biogas energy potential of LM was 1.2×10^(11)*** 2012 to 2021,the average carbon emission reduction potential in Shaanxi was 22%,with an average potential scale of 10%.The results of this research provide valuable data and policy recommendations for promoting the intensive use of LM and reducing carbon emissions in Shaanxi.

关键词： Livestock manure emission estimation N and P loads biogas potential carbon emission reduction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Na^(+)/K^(+)-ATPase-dependent autophagy protects brain against ischemic injury

引用

Signal Transduction and Targeted Therapy 2020年第1期5卷 1837-1839页

作者： mengyuan zhu Lei Cao Siping Xiong Haijian Sun Zhiyuan Wu Jin-Song Bian Department of Pharmacology Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117600Singapore National University of Singapore(Suzhou)Research Institute SuzhouChina

Dear Editor,Cerebral ischemic stroke is one of the leading causes of death worldwide with no effective treatment ***,the investigation of potential intervention targets is urgently ***^(+)/K^(+)-ATPase(NKA),a well-studied transmembrane protein pump expressed in all cells,is essential for the maintenance of cell membrane potential by exchanging three sodium ions out with two potassium ions into the cell to strictly regulate the electrochemical gradient and hence neuronal *** energy demand of NKA-mediated maintenance of the membrane potential is~40%of the energy produced by respiration in the brain.1 NKAα1 is ubiquitously expressed and important for ion gradient *** of the function of NKAα1 was recently reported to relieve ischemic damage.

关键词： ischemic death hence

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

可膨胀石墨的制备方法、膨胀机理及应用

引用

化工科技 2024年第4期32卷 62-66页

作者：刘磊朱梦媛赵波赵晴王路宽叶欣刘晓红赵露舒马宇浩贺爱华王存国青岛科技大学橡塑材料与工程教育部重点实验室山东省橡塑材料与工程重点实验室山东青岛266042 昌邑森汇新材料有限公司山东潍坊261300

膨胀石墨由于其质量轻、高柔韧性、高比表面积、高孔隙率和较强的吸附能力,作为密封材料、吸附材料、保温材料、阻燃材料和包装材料等应用广泛。可膨胀石墨作为膨胀石墨的前驱体,低成本、绿色制备方法和研发成为目前石墨领域的重点研究... 详细信息

膨胀石墨由于其质量轻、高柔韧性、高比表面积、高孔隙率和较强的吸附能力,作为密封材料、吸附材料、保温材料、阻燃材料和包装材料等应用广泛。可膨胀石墨作为膨胀石墨的前驱体,低成本、绿色制备方法和研发成为目前石墨领域的重点研究课题之一。对可膨胀石墨的结构和性能、膨胀反应原理、制备方法及其主要应用领域进行了综述,详细地介绍了化学氧化法、电化学方法、超声氧化法、气相扩散法、熔盐法等制备可膨胀石墨方法,为其下游产品膨胀石墨的制备、应用和开发提供借鉴。

关键词：石墨可膨胀石墨膨胀石墨插层剂膨胀机理

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Structure， properties， bioactivities and structure-activity relationships of polysaccharides from Nostoc flagelliforme grown under three different culture conditions

引用

Food Science and Human Wellness 2024年

作者： Yanru Li Shigang Shen Longfei Wang mengyuan Li Yan Zhang Shiru Jia Ruiying zhu Peipei Han State Key Laboratory of Food Nutrition and Safety， Key Laboratory of Industrial Fermentation Microbiology， Ministry of Education， College of Biotechnology， Tianjin University of Science and Technology

The physicochemical properties， structural characteristics， antioxidant， radioprotective and lipid-lowering activities， as well as the underlying structure-activity relationships of polysaccharides extracted from Nostoc flagelliforme grown under normal （WL-EPS-1）， salt stress （NaCl-EPS-1） and mixotrophic culture conditions （Glu-EPS-1） were studied. The results demonstrated that WL-EPS-1， NaCl-EPS-1 and Glu-EPS-1 were heteropolysaccharides comprising different proportions of monosaccharides and uronic acid， with different average molecular weights of 0.99 × 103， 1.09 × 103and 1.18 × 103kDa， respectively. Their intrinsic viscosity values were significantly different， at 24.72 dL/g， 29.98 dL/g and 41.06 dL/g， respectively. The functional groups of polysaccharides were not greatly affected， but the chemical composition， triple-helix structure， chain length and surface morphology were significantly influenced by culture conditions. In vitro bioactivity assays showed that the antioxidant activity generally increased in the order of WL-EPS-1 < NaCl-EPS-1 < Glu-EPS-1， while NaCl-EPS-1 had the best radioprotective effect， and Glu-EPS-1 had the best lipid-lowering effect. In addition， the structure-activity relationship of the polysaccharides was analyzed by Partial Least Squares （PLS）， which revealed that the most important factors affecting the antioxidant， radioprotective and lipid-lowering activities of polysaccharides were viscosity and molecular weight. This study provides a strategy for obtaining high-bioactivity polysaccharides by appropriate regulation of culture conditions， as well as opening new directions for the molecular modification of polysaccharides.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

端边云协同环境下能耗感知的工作流实时调度策略

引用

计算机集成制造系统 2022年第10期28卷 3122-3130页

作者：秦志威栗娟刘晓朱梦圆武汉工程大学计算机科学与工程学院湖北武汉430205 武汉工程大学智能机器人湖北省重点实验室湖北武汉430205 迪肯大学信息技术学院澳大利亚墨尔本VIC 3125

针对端边云协同环境下工作流应用场景中,智能终端可移动、边缘服务器服务范围有限、用户实时性要求高和终端能耗等问题,建立了基于端边云异构资源有效协同的工作流任务执行时间模型和终端能耗模型,在此基础上构建端边云环境下能耗感知... 详细信息

针对端边云协同环境下工作流应用场景中,智能终端可移动、边缘服务器服务范围有限、用户实时性要求高和终端能耗等问题,建立了基于端边云异构资源有效协同的工作流任务执行时间模型和终端能耗模型,在此基础上构建端边云环境下能耗感知的工作流实时调度模型,并提出能耗感知的工作流任务调度算法。该算法首先根据工作流特性划分子任务优先级;其次根据终端初始位置信息,利用改进粒子群优化算法找到一个最优的资源调度方案;然后根据终端移动轨迹筛选可迁移资源,并为每个任务动态选择最优迁移决策。仿真结果表明,与已有策略相比,新策略能够在满足时间延时的约束下降低终端能耗,获得最优系统适应度值。

关键词：端边云协同工作流调度能耗感知低时延

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于雾计算的无线传感器网络联合入侵检测算法

引用

北京航空航天大学学报 2022年第10期48卷 1943-1950页

作者：朱梦圆陈卓刘鹏飞吕娜空军工程大学信息与导航学院西安710077 解放军94619部队六安237000

为了保障无线传感器网络的安全性,提出一种基于雾计算的联合入侵检测算法Fed-XGB。Fed-XGB算法通过引入雾计算节点扩展网络边缘,减少通信时延,在提升联合学习全局模型和局部模型准确率的同时,降低了传输带宽和隐私泄露风险;通过改进基... 详细信息

为了保障无线传感器网络的安全性,提出一种基于雾计算的联合入侵检测算法Fed-XGB。Fed-XGB算法通过引入雾计算节点扩展网络边缘,减少通信时延,在提升联合学习全局模型和局部模型准确率的同时,降低了传输带宽和隐私泄露风险;通过改进基于直方图的近似计算方法,适应无线传感器网络数据不均衡特征;通过引入TOP-K梯度选择,最小化模型参数上传次数,提高模型参数交互效率。实验结果表明:Fed-XGB算法的检测准确率在0.97以上,误报率在0.036以下,优于其他对比算法;在遭受中毒攻击及数据含噪的情况下,算法检测分类性能依然稳定,具有较强的鲁棒性。

关键词：无线传感器网络入侵检测雾计算联合学习深度学习

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：