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Influence of Doped Ions on Persistent Luminescence Materials:a Review

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Chinese Journal of Structural Chemistry 2022年第2期41卷 148-158,I0012页

作者： ZHANG Liu-Wei SHEN Rui-Chen TAN Jie yuan quan Institute of Chemical Biology and Nanomedicine State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Persistent luminescence materials(PLMs) are potential luminescent materials which can remain emitting light after stopping the *** can avoid the autofluorescence of biological tissues,and play an important role in biosensing,targeted imaging and other ***,the applications of PLMs are often restricted by their weak persistent luminescence and short decay time after *** ions will directly affect the luminescence centers and trap levels of PLMs,thereby leading to great differences in the optical performance of *** this,the selection of doped ions to improve the optical performance of PLMs has become a fascinating research direction in recent *** present,the published reviews mostly focus on the surface modifications and applications of ***,the influence of doped ions on the structure and optical performance of PLMs is seldom *** this review,the influence of doped ions on the structure and optical performance of PLMs is introduced from three aspects:the type of doped ions,the number of types of doped ions,and the content of doped ***,we highlight recent achievements and mechanisms in the development of ***,we also propose and discuss the future opportunities and current challenges of ion-doped PLMs.

关键词： persistent luminescence doped ions structure and optical performance

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Review of Current Status and Research Approaches to Nitrogen Pollution in Farmlands

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Agricultural Sciences in China 2009年第7期8卷 843-849页

作者： NIE Sheng-wei GAO Wang-sheng CHEN yuan-quan SUI Peng A Egrinya Eneji Research Center of Circulor Agroculture China Agricultural University Beil＇ing 100193 P.R. China College of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R.China

In this paper, the history, current status, and research approaches to nitrogen pollution were reviewed using systems analysis and deductions. The seriousness of N pollution world-wide was highlighted and recommendations were made to address the situation. A new hypothesis based on phytoremediation, which means the use of plants to directly or indirectly degrade or remove contaminats from soil and water, was proposed.

关键词： review methods N pollution farmlands China

Direct low-temperature synthesis of ultralong persistent luminescence nanobelts based on a biphasic solution-chemical reaction

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Chinese Chemical Letters 2018年第11期29卷 1641-1644页

作者： Haoyang Liu Xiaoxia Hu Jie Wang Meng Liu Wei Wei quan yuan Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education) College of Chemistry and Molecular SciencesWuhan University State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences

Here, we report the direct hydrothermal synthesis of 1 D-based Zn2GeO4：Mn2＋ persistent luminescent nanobelts （ZGO：Mn PLNBs）. The ZGO：Mn PLNBs exhibit rapid growth rate, and nanobelts can be obtained after 30 rain of hydrothermal treatment. The persistent luminescence performance can be fine-turned upon prolonging the hydrothermal time. Furthermore, the doping ratio of Mn2＋ exhibits influence on the persistent luminescence properties of ZGO：Mn PLNBs, and 2% doping of Mn2＋ shows superior persistent luminescence with decay time of longer than 20min. The developed 1D-based ZGO：Mn PLNBs can be simply prepared with the hydrothermal method and show tunable morphology and persistent luminescence. We believe that this solid-state-reaction-free chemical approach avoids the current key drawback in regard to PLNMs development, and thus will promote the broad use of these unique nanostructured PLNMs in developing optical device for imaging.

关键词： Hydrothermal Persistent luminescence Nanobelts Zinc germinate Mn ion

Direct and single-step sensing of primary ovarian cancers related glycosidases

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Chinese Chemical Letters 2019年第5期30卷 1013-1016页

作者： Dan Li Ling Liang Yawei Tang Linna Fu Shehua Xiao quan yuan Molecular Science and Biomedicine Laboratory Institute of Chemical Biology and Nanomedicine State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University

High sensitive,accurate detection for tumor-associated overexpressed enzyme activity is highly significant for further understanding enzyme function,discovering potential drugs,and early diagnosis and prevention of *** this work,we developed a facile,direct and single-step detection platform for primary ovarian cancers related glycosidase activity based on the inner filter effect(IFE)between glycosidase catalytic product and black phosphorus quantum dots(BPQDs).Highly fluorescent BPQDs were successfully synthesized from bulk black phosphorus by a simple liquid exfoliation *** the catalysis ofβ-galactosidase,p-nitrophenyl-β-D-galactopyranoside(PNPG)was transformed into pnitrophenol(PNP)andβ-***,the absorption of catalytic product PNP greatly overlapped with the excitation and emission spectra of fluorescent BPQDs,leading to the fluorescence quenching of BPQDs with a high quenching *** proposed sensing strategy provided a low detection limit of 0.76 U/L,which was 1-2 orders of magnitude lower than most unmodified sensing platforms.D-Galactal was selected as the inhibitor forβ-galactosidase to further assess the feasibility of screening potential *** fluorescence recovery of BPQDs suggests that the unmodified sensing platform is feasible to discover potential drugs ofβ-*** work paves a general way in the detection of glycosidase activity with fluorescent BPQDs,which can be promising for glycosidase-related disease diagnosis and pathophysiology elucidation.

关键词： Black phosphorus quantum dots Fluorescence Sensing β-Galactosidase Inner filter effect

Chemical Constituents of the Roots of Vernonia cumingiana Benth.

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Journal of Integrative Plant Biology 2005年第8期47卷 1016-1020页

作者： Qing-Hua LIU Jing-quan yuan Mao-Rong SUO Jun-Shan YANG Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100094 China Guangxi Botanical Garden of Medicinal Plants Nanning 530023 China

To search for new and bioactive constituents from traditional Chinese medicines, a new steroidal saponin, named vernonioside G （1）, was isolated from the roots of Vernonia cumingiana Benth. （Compositae）. The structure of vernonioside G was elucidated using spectral methods, particularly two-dimensional nuclear magnetic resonance analysis. Together with the new compound, eight known compounds were also isolated and identified from the roots of V. cumingiana, among which, VE-1 （2） and 24-methylenelanost-9（11）- en-3β-ol acetate （3） were assigned NMR data for the first time and compound 3 was obtained as a natural product from a plant for the first time.

关键词： Compositae steroidal saponin Vernonia cumingiana vernonioside G.

Big data and variceal rebleeding prediction in cirrhosis patients

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Artificial Intelligence in Gastroenterology 2023年第1期4卷 1-9页

作者： quan yuan Wen-Long Zhao Bo Qin Department of Gastroenterology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400042China College of Medical Informatics Chongqing Medical UniversityChongqing 400016China Medical Data Science Academy Chongqing 400016China Chongqing Engineering Research Centre for Clinical Big-data and Drug Evaluation Chongqing 400016China Department of Infectious Diseases The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400042China

Big data has convincing merits in developing risk stratification strategies for *** 6“V”s of big data,namely,volume,velocity,variety,veracity,value,and variability,have shown promise for real-world *** data can be applied to analyze health data and advance research in preclinical biology,medicine,and especially disease initiation,development,and control.A study design comprises data selection,inclusion and exclusion criteria,standard confirmation and cohort establishment,follow-up strategy,and events of *** development and efficiency verification of a prognosis model consists of deciding the data source,taking previous models as references while selecting candidate predictors,assessing model performance,choosing appropriate statistical methods,and model *** model should be able to inform disease development and outcomes,such as predicting variceal rebleeding in patients with *** work has merits beyond those of other colleagues with respect to cirrhosis patient screening and data source regarding variceal bleeding.

关键词： Big data Disease onset Prognosis Modeling Cirrhosis Gastrointestinal rebleeding

Traffic accidents of autonomous vehicles based on knowledge mapping:A review

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第6期10卷 1061-1073页

作者： Wei Ji quan yuan Gang Cheng Shengnan Yu Min Wang Zefang Shen Tiantong Yang Fada Institute of Forensic Medicine&Science China University of Political Science and LawBeijing 100088China State Key Laboratory of Intelligent Green Vehicle and Mobility School of Vehicle and MobilityTsinghua UniversityBeijing 100084China China University of Political Science and Law Beijing 100088China

As a characteristic representative of the new generation of vehicles,autonomous driving is expected to improve people's driving *** study on traffic accident of autonomous vehicles(AVs)helps provide suggestions for autonomous driving safety from multiple disciplines and perspectives,and provide support for formulating traffic accident treatment *** mapping,as a cutting-edge research method in bibliometrics,scientifically and objectively displays the relevant research status using visual *** paper uses CiteSpace 6.1.r3 to analyze 5068 related literature on the Web of Science database from 1991 to 2022 and finds out major thematic clusters,important documents and representative journals according to citation *** results show that research on traffic accidents involving AVs focuses on accident preventing technologies,including how to avoid collisions,track lane-position,and enhance vehicle-toeverything(V2X)*** paper extracts the mean research topics and key points involved in the field and illustrates journals related to AVs and traffic accidents,which provides guidance for subsequent researchers to carry out in-depth research and contribute their *** journals are in disciplines of mathematics,systems,computer,economics,and social *** paper also suggests scholars to consider the aspects of scene reconstruction,cause analysis,and injury of vulnerable road users,so as to investigate traffic accidents and put forward effective treatment schemes to reduce AV accidents,and ultimately improve road safety.

关键词： Traffic accident Autonomous vehicle Knowledge mapping Bibliometric CiteSpace

Yield penalty of maize(Zea mays L.) under heat stress in different growth stages: A review

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Journal of Integrative Agriculture 2022年第9期21卷 2465-2476页

作者： LI Teng ZHANG Xue-peng LIU Qing LIU Jin CHEN yuan-quan SUI Peng Key Laboratory of Farming Systems Ministry of Agriculture and Rural Affairs/College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193P.R.China

Maize(Zea mays L.) can exhibit yield penalties as a result of unfavorable changes to growing conditions. The main threat to current and future global maize production is heat stress. Maize may suffer from heat stress in all of the growth stages, either continuously or separately. In order to manage the impact of climate driven heat stress on the different growth stages of maize, there is an urgent need to understand the similarities and differences in how heat stress affects maize growth and yield in the different growth stages. For the purposes of this review, the maize growth cycle was divided into seven growth stages, namely the germination and seedling stage, early ear expansion stage, late vegetative growth stage before flowering, flowering stage, lag phase, effective grain-filling stage, and late grain-filling stage. The main focus of this review is on the yield penalty and the potential physiological changes caused by heat stress in these seven different stages. The commonalities and differences in heat stress related impacts on various physiological processes in the different growth stages are also compared and discussed. Finally, a framework is proposed to describe the main influences on yield components in different stages, which can serve as a useful guide for identifying management interventions to mitigate heat stress related declines in maize yield.

关键词： growth stage heat stress maize yield penalty

Triblock copolymer-assisted construction of 20 nm-sized ytterbium-doped TiO_2 hollow nanostructures for enhanced solar energy utilization efficiency

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Science China Chemistry 2015年第5期58卷 850-857页

作者： Lin Cheng Xuefeng Xu Yuyan Fang Yan Li Jiaxi Wang Guojia Wan Xueying Ge Liangjie yuan Keli Zhang Lei Liao quan yuan Key Laboratory of Analytical Chemistry for Biology and Medicine Ministry of Education College of Chemistry and Molecular Sciences Wuhan University Key Laboratory of Artificial Micro- and Nano-structures Ministry of Education Department of Physics Wuhan University

Rare-earth doped titania single-crystalline hollow nanoparticles of 20 nm are constructed via a simple sol-gel process. Amphiphilic ABA tri-block copolymers played a key role in assisting the formation of hollow structure, for which a hollow nanostructure growth mechanism is proposed. By introducing rare earth into the synthesis process, the as-prepared nanoparticles exhibit near-infrared light absorption properties. Photo-decomposition efficiency of Orange II azo dye can be successfully evaluated when using Yb3+-doped Ti O2 hollow nanoparticles as photocatalysts; it is more than two times higher than the pure Ti O2 hollow nanoparticles. The hollow nanostructured Yb3+-doped Ti O2 samples are exploited as photoanodes in N719- sensitized solar cells and prove able to improve the photoelectric conversion efficiency by measuring the solar cell parameters of dye-sensitized solar cells(DSSCs) under simulative sunlight.

关键词： rare earth hollow nanostructure titania single-crystalline copolymer