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Band alignment and interlayer hybridization in monolayer organic/Wse_(2) heterojunction

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Nano Research 2022年第2期15卷 1276-1281页

作者： Yanping Guo Linlu Wu Jinghao Deng Linwei Zhou Wei Jiang shuangzan Lu Da Huo Jiamin Ji Yusong Bai Xiaoyu Lin shunping Zhang Hongxing Xu Wei Ji chendong Zhang Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and school of Physics and Technology Wuhan UniversityWuhan 430027China Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices Renmin University oj ChinaBeijing 100872China

semiconducting heterojunctions(HJs),comprised of atomically thin transition metal dichalcogenides(TMDs),have shown great potentials in electronic and optoelectronic ***/TMD hybrid bilayers hold enhanced pumping efficiency of interfacial excitons,tunable electronic structures and optical properties,and other superior advantages to these inorganic ***,we report a direct probe of the interfacial electronic structures of a crystalline monolayer(ML)perylene-3,4,9,10-tetracarboxylic-dianhydride(PTCDA)/ML-Wse_(2) HJ using scanning tunneling microscopy,photoluminescence,and first-principle *** PTCDAAA/se_(2) interfacial interactions lead to appreciable hybridization of the Wse_(2) conduction band with PTCDA unoccupied states,accompanying with a significant amount of PTCDA-to-Wse_(2) charge transfer(by 0.06 e/PTCDA).A type-ll band alignment was directly determined with a valence band offset of-1.69 eV,and an apparent conduction band offset of-1.57 ***,we found that the local stacking geometry at the HJ interface differentiates the hybridized interfacial states.

关键词： two-dimensional materials organic/transition metal dichalcogenide(TMD)heterojunction interlayer hybridization band diagram

Us Pilots' Remains Homeward Bound

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China's Tibet 1994年第2期5卷 10-13页

作者： Zou chendong, Wu Hao and Liu Yongnian

On December 7.1993,as|soon as an airplane landed at the Uhasa airport,sever-al Americans dashed down from *** with impatience,they were in no mood to enjoy the wonderful scenery in this city on the heights,but asked i... 详细信息

关键词： Us Pilots Remains Homeward Bound

synthesis of water-soluble dye-cored poly(amidoamine) dendrimers for long-term live cell imaging

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science China Materials 2018年第11期61卷 1475-1483页

作者： Yang Cai chendong Ji s.aobo Zhang Zhiqiang su Meizhen Yin state Key Laboratory of Chemical Resource Engineering Beijing Laboratory of Biomedical MaterialsBeijing University of Chemical TechnologyBeijing 100029China

Hydrophilic dendrimers, especially poly（amidoamine）（PAMAM） dendrimers are widely applied in modifying fluorescent dyes to endow them with water solubility and biocompatibility for biologic fluorescence *** preparation strategies of fluorescent dendrimers including encapsulating dyes or attaching dyes at periphery of dendrimers might cause uncertain constituent and lower biocompatibility. Here, we have developed a series of watersoluble fluorescent dendrimers with dye as core and fanshaped PAMAM as arms. Carboxylated perylene bisimides（PBI） dye and squarylium indocyanine（sICy） dye were conjugated with PAMAM dendrons by amidation to obtain a series of fluorescent dendrimers with enhanced water-solubility. Two PBI based dendrimers（PBI-G2.5 and PBI-G1.5）were chosen as model compounds for further optical, selfassembly and biological studies. In aqueous environment,PBI-G2.5 exhibited strong fluorescence, small size（~30 nm）and slightly positive surface charge（~2.46 mV）, which are ideal for biomedical applications. In vitro assays demonstrated that PBI-G2.5 nanoparticles accumulated in the cytoplasm of He La cells with rapid cellular uptake. The strong fluorescence in He La cells remained for over 48 h. To conclude, our study provides an effective strategy for preparing water-soluble fluorescent dendrimers towards long-term live cell imaging.

关键词： fluorescent dendrimers fan-shaped PAMAM perylene bisimides water solubility live cell imaging

study on Non-Isothermal Decomposition Kinetics of Ephedrini Hydrochloridum

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Wuhan University Journal of Natural sciences 2003年第02A期8卷 443-446页

作者： TangWan-jun chendong-hua shengYu-fang CollegeofChemistryandMolecularsciences WuhanUniversityWuhan430072HubeiChina CollegeofChemistryandLifesciences South-CentralUniversityforNationalityWuhan430074HubeiChina

The thermal decomposition processes of ephedrini hydrochloridum and its kinetics are studied by TG-DTG techniques. A combined method, which includes Achar method, Coats-Redfera method, and Ozawa method, is put forward for determining kinetic model under non-isothermal conditions. By applying the combined method, it is determined that the thermal decomposition of ephedrini hydrochloridum is subjected to cylindrical symmetric diffusion. And the reaction function isƒ(α)=2(1-α)?, apparent activation energy (115.26±3.55) kJ·mol−1, pre-exponential factor 4.62×108 s−1. Results show that the combined method is feasible and simple.

关键词： Key Words ephedrini hydrochloridum TG DTG technique non isothermal kinetics combined method thermal decomposition

Development of the novel ACLY inhibitor 326E as a promising treatment for hypercholesterolemia

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Acta Pharmaceutica sinica B 2023年第2期13卷 739-753页

作者： Zhifu Xie Mei Zhang Qian song Long Cheng Xinwen Zhang Gaolei song Xinyu sun Min Gu chendong Zhou Yangming Zhang Kexin Zhu Jianpeng Yin Xiaoyan Chen Jingya Li Fajun Nan state Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of sciences Beijing 100049China Burgeon Therapeutics Co. Ltd.Shanghai 201203China Drug Discovery shandong Laboratory Bohai Rim Advanced Research Institute for Drug DiscoveryYantai 264117China

Hepatic cholesterol accumulation is an important contributor to hypercholesterolemia,which results in atherosclerosis and cardiovascular disease(CVD).ATP-citrate lyase(ACLY)is a key lipogenic enzyme that converts cytosolic citrate derived from tricarboxylic acid cycle(TCA cycle)to acetyl-CoA in the ***,ACLY represents a link between mitochondria oxidative phosphorylation and cytosolic de novo *** this study,we developed the small molecule 326E with an enedioic acid structural moiety as a novel ACLY inhibitor,and its CoA-conjugated form 326E-CoA inhibited ACLY activity with an IC_(50)=5.31±1.2μmol/L in vitro.326E treatment reduced de novo lipogenesis,and increased cholesterol efflux in vitro and in vivo.326E was rapidly absorbed after oral administration,exhibited a higher blood exposure than that of the approved ACLY inhibitor bempedoic acid(BA)used for *** 326E treatment in hamsters and rhesus monkeys resulted in remarkable improvement of *** daily oral administration of 326E for 24 weeks prevented the occurrence of atherosclerosis in ApoE^(-/-)mice to a greater extent than that of BA *** together,our data suggest that inhibition of ACLY by 326E represents a promising strategy for the treatment of hypercholesterolemia.

关键词： Hypercholesterolemia Atherosclerosis Liver ATP-Citrate lyase(ACLY) Lipogenesis Cholesterol efflux ACLY inhibitor

诗歌语言话语分析的认知整合框架:以谢默斯·希尼的《传神言者》为例

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外国语文 2017年第3期33卷 81-89页

作者：项成东天津外国语大学英语学院天津300204

本文主要探讨认知语言学与诗学之间的关系,并在"多样化的统一性"美学原则的基础上,考察了概念整合理论及其相关理论能为诗歌分析提供哪些有用的资源。通过对西蒙斯·希尼的诗篇《传神言者》的分析,本文作者认为概念整合理论可以用作诗... 详细信息

本文主要探讨认知语言学与诗学之间的关系,并在"多样化的统一性"美学原则的基础上,考察了概念整合理论及其相关理论能为诗歌分析提供哪些有用的资源。通过对西蒙斯·希尼的诗篇《传神言者》的分析,本文作者认为概念整合理论可以用作诗歌分析的理论框架,可以为诗学研究提供系统的研究方法。

关键词：美学原则心理空间概念整合理论认知诗学

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元认知在英语听力理解教学中的运用

元认知在英语听力理解教学中的运用

作者：陈东成都理工大学

学位级别：硕士

20世纪70年代,美国著名心理学家Flavell根据自己及他人的多方面研究提出新概念元认知,即认知主体对自身认知活动的认识。之后国外研究者首先在语言学习的研究中引用了这一概念,指语言学习者对语言学习方法和学习思维活动的观念和知识,... 详细信息

20世纪70年代,美国著名心理学家Flavell根据自己及他人的多方面研究提出新概念元认知,即认知主体对自身认知活动的认识。之后国外研究者首先在语言学习的研究中引用了这一概念,指语言学习者对语言学习方法和学习思维活动的观念和知识,并开始了语言习得中元认知研究,近些年中国许多语言研究人员也开始关注如何学习英语。越来越多的证据表明学习者本身在学习中起着十分重要的作用。学习者通常认为听力是积极的信息处理而不是被动的接受。他们使用各种听力理解策略帮助理解听力内容。为了更好的理解听力理解的过程,本研究对大学生英语听力元认知情况进行调查,并对听力元认知意识程度和听力理解能力的关系做了研究,分析了元认知策略与听力理解的关系,为大学英语听力教学提供参考。该研究通过自己设计的元认知问卷调查表和对成都理工大学120名学生听力测试分析听力理解策略水平。将学生分成两组:实验组和控制组。分析调查结果表明非英语专业学生运用元认知策略处于较低水平。对实验组进行元认知策论培训,通过两组数据分析表明元认知策略与听力成绩有着紧密相连。分析结果给教学带来一定的启示:英语听力教学中,教师应致力于帮助学生把元认知知识与学习实践联系起来,帮助学生缩短二者之间的距离。使元认知知识在引导学生加强听力联系和运用听力策略方面切实起到作用,提高学生听力理解能力。

关键词：听力理解元认知元认知策略

The Loeb Algebras of Absolutely Continuous Measure

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Chinese Quarterly Journal of Mathematics 2004年第2期19卷 218-220页

作者： chendong-li YUANWen-fa schoolofscience Xi＇anUniversityofArchitectureandTechnologyXi＇an710055China

It is proved that if μ and v be finite measures on a measurable space (X, s) and v is absolutely continuous with respect to v, then it is holds that L(* s, * μ) L(* s, *v), while L(*s, *μ) and L(*s, V) are the Loeb... 详细信息

关键词： absolute continuous Loeb measure space denumerable comprehension overflow principle infinitesimal prolongation

网络舆论如何影响教育政策?——使用调适的多源流理论框架分析国家“双减”政策议程

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中国远程教育 2024年第1期44卷 35-45页

作者：黄巨臣焦晨东兰州大学高等教育研究院兰州730000

随着互联网快速普及,网络舆论逐渐成为影响公共政策的重要因素。当前,校外培训进入规范治理期,网络舆论如何在议程设置中影响教育政策制定,是一个值得深入探讨的议题。根据现实情况和主题内容的需要,本研究对金登多源流理论原型进行调适... 详细信息

随着互联网快速普及,网络舆论逐渐成为影响公共政策的重要因素。当前,校外培训进入规范治理期,网络舆论如何在议程设置中影响教育政策制定,是一个值得深入探讨的议题。根据现实情况和主题内容的需要,本研究对金登多源流理论原型进行调适,构建“一中心·两阶段·三源流”理论框架,并以国家“双减”政策议程分析为例,对网络舆论如何影响教育政策进行探究。研究发现:“议程设置”是理解和分析校外培训治理政策的一个中心点,而政策议程在网络舆论的推动下呈现出从“问题之窗”到“政治之窗”前后递进的两个阶段,问题源流、政治源流与政策源流也在两两叠加耦合中交汇,最终开启“政策之窗”使“双减”政策得以起草出台。本研究有助于深入理解中国情境下多源流理论如何适用并解释教育政策的议程开展问题。

关键词：网络舆论教育政策多源流理论 “双减” 议程设置

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