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High photoelectric conversion efficiency and fast relaxation time of FA_(0.4)MA_(0.6)PbI_(3) applied in ultrafast modulation of terahertz waves

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Journal of Energy Chemistry 2024年第4期91卷 299-305页

作者： Zhibo Xu Ying Zeng xinran zhao Xiaoyin Chen Aoyu Fan Furi Ling Jiang Li Jianquan Yao School of Optics and Electronic Information Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Precision Instrument and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900SichuanChina School of Information Engineering Wuhan University of TechnologyWuhan 430070HubeiChina National Engineering Research Center of Fiber Optic Sensing Technology and Networks Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks Wuhan 430070HubeiChina

Active control of terahertz(THz)waves is attracting tremendous attentions in terahertz communications and active photonic ***,due to its excellent photoelectric conversion performance and simple manufacturing process,has emerged as a promising candidate for optoelectronic ***,the exploration of perovskites in optically controlled THz modulators is still *** this work,the photoelectric properties and carrier dynamics of FA_(0.4)MA_(0.6)PbI_(3)perovskite films were investigated by optical pumped terahertz probe(OPTP)*** ultrafast carrier dynamics reveal that FA_(0.4)MA_(0.6)PbI_(3)thin film exhibits rapid switching and relaxation time within picosecond level,suggesting that FA_(0.4)MA_(0.6)PbI_(3)is an ideal candidate for active THz devices with ultrafast ***,as a proof of concept,a FA_(0.4)MA_(0.6)PbI_(3)-based metadevice with integrating plasma-induced transparency(PIT)effect was fabricated to achieve ultrafast modulation of THz *** experimental results demonstrated that the switching time of FA_(0.4)MA_(0.6)PbI_(3)-based THz modulator is near to 3.5 ps,and the threshold of optical pump is as low as 12.7μJ cm^(-2).The simulation results attribute the mechanism of ultrafast THz modulation to photo-induced free carriers in the FA_(0.4)MA_(0.6)PbI_(3)layer,which progressively shorten the capacitive gap of PIT *** study not only illuminates the potential of FA_(0.4)MA_(0.6)PbI_(3)in THz modulation,but also contributes to the field of ultrafast photonic devices.

关键词： Terahertz modulation Perovskites Metamaterials Plasmon-induced transparency

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Present Situation of Rural Regional Development and Agricultural Extension Policy

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Asian Agricultural Research 2023年第8期15卷 35-37,40页

作者： xinran zhao College of Economics and Management Henan Agricultural UniversityZhengzhou 450002China

The formulation of agricultural extension policy and the development of rural regional economy present the relationship of mutual existence,mutual influence and mutual ***,it is necessary to study the agricultural extension policy according to the current situation of rural regional *** technology extension system is an organization set up at county and township levels to provide farmers with scientific research achievements and practical technical services on planting,animal husbandry,fishery,forestry,agricultural machinery and water conservancy,and it is an important carrier for implementing the strategy of developing agriculture through science and *** the basis of expounding the value and significance of rural regional economic development,this paper analyzes the problems existing in China s rural regional development from the aspects of rural infrastructure and public services,rural labor force s cultural and scientific level,rural grass-roots extension system,etc.,and puts forward corresponding measures against the *** study has certain theoretical reference value for promoting the all-round development of China s rural economy and realizing the great strategy of rural revitalization in China.

关键词： Rural regional development Rural public services Rural infrastructure Agricultural technology extension system Agricultural extension policy

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The graphene nanopowder for electro-catalytic oxidation of dopamine and uric acid in the presence of ascorbic acid

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Journal of Energy Chemistry 2013年第5期22卷 685-689页

作者： Yuan Bu Wenle Dai Nan Li xinran zhao Xia Zuo Department of Chemistry Capital Normal University

The graphene nanopowder for electro-catalytic oxidation of dopamine and uric acid in the presence of ascorbic acid has been investigated by cyclic voltammetry,linear polarization and *** graphene nanopowder modified electrode was prepared using the drop coating method,which displayed excellent electrocatalytic activity towards the oxidation of dopamine and uric acid compared with the bare glassy carbon electrode in phosphate buffer solution at pH=*** responses for dopamine and uric acid were obtained in the ranges of3.3μmol/L to 249.1μmol/L and 6.7μmol/L to 386.3μmol/L with detection limits of 1.5μmol/L and 2.7μmol/L(S/N=3),*** response time was less than 2 s in case of dopamine and 3 s in case of uric acid,*** results demonstrated that the graphene nanopowder had potential for detecting dopamine and uric acid.

关键词： graphene nanopowder electro-catalytic dopamine uric acid

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Genome-wide identification of the CONSTANS-LIKE(COL)family and mechanism of fruit senescence regulation by PpCOL8 in sand pear(Pyrus pyrifolia)

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Journal of Integrative Agriculture 2024年第4期23卷 1222-1237页

作者： Yue Xu Shurui Song Huiying Wang Xilong Cao xinran zhao Wenli Wang Liyue Huo Yawei Li Misganaw Wassie Bin Lu Liang Chen Haiyan Shi College of Horticulture Hebei Agricultural UniversityBaoding 071001China Wuhan Botanical Garden Chinese Academy of SciencesWuhan 430074China

Pyrus pyrifolia Nakai‘Whangkeumbae'is a sand pear fruit with excellent nutritional quality and ***,the industrial development of pear fruit is significantly limited by its short shelf *** acid(SA),a well-known phytohormone,can delay fruit senescence and improve shelf ***,the mechanism by which SA regulates CONSTANS-LIKE genes(COLs)during fruit senescence and the role of COL genes in mediating fruit senescence in sand pear are poorly *** this study,22 COL genes were identified in sand pear,including four COLs(Pp COL8,Pp COL9a,Pp COL9b,and Pp COL14)identified via transcriptome analysis and 18 COLs through genome-wide *** COL genes were divided into three subgroups according to the structural domains of the COL *** COL8,with two B-box motifs and one CCT domain,belonged to the first *** contrast,the other three Pp COLs,Pp COL9a,Pp COL9b,and Pp COL14,with similar conserved protein domains and gene structures,were assigned to the third *** four COLs showed different expression patterns in pear tissues and were preferentially expressed at the early stage of fruit ***,the expression of Pp COL8 was inhibited by exogenous SA treatment,while SA up-regulated the expression of Pp COL9a and Pp ***,Pp COL8 interacts with Pp MADS,a MADS-box protein preferentially expressed in fruit,and SA up-regulated its *** the production of ethylene and the content of malondialdehyde(MDA)were increased in Pp COL8-overexpression sand pear fruit,the antioxidant enzyme(POD and SOD)activity and the expression of Pp POD1 and Pp SOD1 in the sand pear fruits were down-regulated,which showed that Pp COL8 promoted sand pear fruit *** contrast,the corresponding changes were the opposite in Pp MADS-overexpression sand pear fruits,suggesting that Pp MADS delayed sand pear fruit *** co-transformation of Pp COL8 and Pp MADS also delayed sand pear fruit *** re

关键词： Pyrus pyrifolia CONSTANS-LIKE gene salicylic acid fruit senescence MADS

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Peptide therapeutics and assemblies for cancer immunotherapy

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Science China Materials 2019年第11期62卷 1759-1781页

作者： Mingming Li xinran zhao Jianfang Dai Zhilin Yu Key Laboratory of Functional Polymer Materials Ministry of Education State Key Laboratory of Medicinal Chemical Biology Institute of Polymer Chemistry College of Chemistry Nankai University

Immunotherapy has been considered as one of the most promising strategies for protection against cancer cells due to the tremendous advantages arising from host immune ***,establishing versatile strategies with high biosafety and the capability for efficient modulation of immune responses remains *** structural features resembling native proteins of peptides bestow their great potential to address these challenges via either directly eliciting immune responses or improving the efficacy of *** review summarizes the progress of cancer immunotherapy achieved based on the strategies utilizing short peptides as therapeutic agents or peptide assemblies as delivery scaffolds,beyond long sequences like proteins and *** from a brief introduction of cancer immunotherapy,we outline the peptide sequences in terms of their specific functions including immune checkpoint blockades,vaccine antigens and *** particularly highlight peptide-based nanomaterials as scaffolds for targeting delivery or co-delivery of multiple therapeutics to enhance *** extraordinary therapeutic efficacy of the limited examples covered here demonstrates the great potency of the peptide-based strategies in modulating immune responses,thus potentially facilitating the clinical translation of cancer immunotherapy in the future.

关键词： cancer immunotherapy peptides self-assembly checkpoint blockades combinatorial immunotherapy

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圈养与野外近人环境猕猴肠道菌群的比较分析

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野生动物学报 2024年第2期45卷 269-275页

作者：赵欣然王晓晨中国科学院动物所动物生态学与保护生物学重点实验室北京100101

通过对来自北京动物园10只圈养猕猴(Macaca mulatta)和来自河南济源五龙口风景区10只处于野外近人环境中的猕猴的粪便微生物进行鸟枪法测序,分析两种不同环境下猕猴的肠道菌群组成和差异。结果表明:20份样品共检测出9个门、18个纲、22... 详细信息

通过对来自北京动物园10只圈养猕猴(Macaca mulatta)和来自河南济源五龙口风景区10只处于野外近人环境中的猕猴的粪便微生物进行鸟枪法测序,分析两种不同环境下猕猴的肠道菌群组成和差异。结果表明:20份样品共检测出9个门、18个纲、22个目、31个科、46个属和226个种。通过分析发现,圈养和野外近人环境群体共享了绝大部分细菌(200种),但是近人环境群体相比于圈养群体,独有更多种类的微生物。圈养猕猴肠道微生物主要由厚壁菌门(Firmicutes)、拟杆菌门(Bacteroidetes)和绿弯菌门(Chloroflexi)组成。处于野外近人环境中的猕猴肠道微生物主要由厚壁菌门、变形菌门(Proteobacteria)和拟杆菌门组成。圈养猕猴和近人猕猴属水平上的肠道微生物结构存在显著差异(p=0.001)。圈养猕猴和野外近人环境猕猴肠道菌群组成的多样性与差异,可为猕猴的圈养以及景区野生动物管理提供指导和理论基础。

关键词：猕猴肠道菌群鸟枪法测序宏基因组分析

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反垄断私人诉讼原告资格的扩张逻辑与规则展开

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中南财经政法大学研究生论丛 2022年第4期 118-126页

作者：赵馨冉北京科技大学文法学院北京100083

民事诉讼法规定的原告资格标准在反垄断私人诉讼领域无法保障市场主体的合法权益,实现维护市场竞争秩序的目的。参考国外反垄断私人诉讼原告由受损害到受影响的转型历程以及我国反垄断发展的实际需要,扩张原告资格范围具有可行性与必要... 详细信息

民事诉讼法规定的原告资格标准在反垄断私人诉讼领域无法保障市场主体的合法权益,实现维护市场竞争秩序的目的。参考国外反垄断私人诉讼原告由受损害到受影响的转型历程以及我国反垄断发展的实际需要,扩张原告资格范围具有可行性与必要性。具体制度层面,首先,明确基于受影响标准的资格判定框架淇次,厘清原告资格的合理边界;最后,通过完善团体诉讼以及损害量化程序等型塑私人诉讼的配套机制。

关键词：反垄断私人诉讼原告资格范围受影响标准团体诉讼

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基于体验经济特征的消费场景设计策略研究

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城市建筑 2021年第12期18卷 132-134页

作者：赵欣冉同济大学建筑与城市规划学院上海200092

城市在加快由“生产”驱动向“消费”驱动转变的步伐。随着人类需求的高级化发展和线上消费的崛起,“体验”成了线下消费的关键词。从城市层面来看,体验消费对于人群的吸引力可以催化城市公共空间的形成,提供城市发展的动力,并提升经 ... 详细信息

城市在加快由“生产”驱动向“消费”驱动转变的步伐。随着人类需求的高级化发展和线上消费的崛起,“体验”成了线下消费的关键词。从城市层面来看,体验消费对于人群的吸引力可以催化城市公共空间的形成,提供城市发展的动力,并提升经济活动的效率。笔者基于体验经济的现状,在4个特征的基础上新增一个特征,并提出相应的设计策略。

关键词：体验模型消费场景设计策略

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西班牙语精读课程中混合式教学模式研究

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创新创业理论研究与实践 2018年第15期1卷 75-76页

作者：赵昕然北京城市学院北京100020

在各大高校的非通用语专业教学计划中,精读课程占有相当重要的地位。从2014年起,西班牙语专业的精读课程采用了全新教材,要求学生在课前做到高标准的自主学习。由于学生个体差异,学生自主学习能力提升是很多高校面临的重要问题之一。教... 详细信息

在各大高校的非通用语专业教学计划中,精读课程占有相当重要的地位。从2014年起,西班牙语专业的精读课程采用了全新教材,要求学生在课前做到高标准的自主学习。由于学生个体差异,学生自主学习能力提升是很多高校面临的重要问题之一。教师提前录制难点知识点的讲解视频,配合课前练习、答疑讨论区的设立,可形成混合式教学模式,解决学生自主学习能力较差的问题,同时提升教师授课效率。

关键词：西班牙语精读混合式教学

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试论市场经济条件下人民警察的职业道德教育

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河北科技大学人民警察学院学报 2002年第1期2卷 69-71页

作者：赵新然河北科技大学人民警察学院河北石家庄050091

人民警察是具有武装性质的治安行政力量,肩负着打击敌人,保护人民,惩罚犯罪,保卫社会主义现代化建设的重任。因此,在市场经济条件下,采取有效方法,加强人民警察道德教育具有十分重要的意义。

关键词：市场经济人民警察职业道德教育

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