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Synthesis,structure and optical properties of novel thermally robust Dy^(3+)-doped Ca_(9)Sc(PO_(4))_(7) phosphors for NUV-excited white LEDs

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Journal of Rare Earths 2021年第3期39卷 277-283,I0002页

作者： Haiyan Wu Huimin Li Lihong jiang Ran Pang Su zhang Da Li Guanyu Liu Chengyu Li jing feng Hongjie zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China Engineering Product Development Singapore University of Technology and Design8 Somapah Road487372Singapore

The powder samples of Ca_(9)Sc(PO_(4))_(7):xDy^(^(3+))white emitting phosphors were prepared via a solid state reaction *** Ca_(9)Sc(PO_(4))_(7):Dy^(3+)samples were researched by using the GSAS Rietveld refinement and X-ray diffraction(XRD) methods,and SEM images and elemental maps were *** 350 nm excitatio n,the emission spectra of Ca_(9)Sc(PO_(4))_(7):xDy^(3+)samples have two obvious peaks and one weak peak at 484,572 and660 nm,corresponding to the characteristic electron transitions of(^(4)F_(9/2)→ ^(6)H_(15/2),blue),(^(4)F_(9/2)→ ^(6)H_(13/2),yellow) and(^(4)F_(9/2)→ 6 H11/2,red),*** concentration quenching effect,decay lifetime and thermal quenching of the as-synthesized Ca_(9)Sc(PO_(4))_(7):Dy^(3+)samples were researched *** Ca_(9)Sc(PO_(4))_(7):0.02 Dy^(3+)phosphor possesses a good thermal stability,of which the emission intensity at 423 K can maintain 79% of the initial value(273 K).In addition,through the study of the chro maticity coordinates of the Ca_(9)Sc(PO_(4))_(7):0.02 Dy^(3+)phosphor,it is found that it is located in the white region,and the Commission Internationalede L’Eclairage(CIE) chromaticity coordinates are(0.339,0.389),The above results show that Ca_(9)Sc(PO_(4))_(7):xDy^(3+)phosphors can be excellent candidate material for applications in NUV-excited white LEDs.

关键词： Ca_(9)Sc(PO_(4))7:Dy^(3+) White LEDs Phosphate Photoluminescence Rare earths

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Effect of SNC19/ST14qene overexpression on invasion of colorectal cancer cells

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World Journal of Gastroenterology 2005年第36期11卷 5651-5654页

作者： Ke-feng Ding Li-feng Sun Wei-Ting Ge Han-Guang Hu Su-Zhan zhang Shu Zheng Surgery of Oncology The Second Affiliated Hospital School of Medicine Zhejinag UniversityHangzhou 310009 Zhejiang Province China Cancer Institute School of Medicine Zhejinag University Hangzhou310009 Zhejiang Province China

AIM： TO study the effect of SNC19/ST14gene overexpression on invasion in vitro of colorectal cancer cells. METHODS： The adhesion of SlVC19/ST14gene-transfected cells to ECM was measured by MTT assay. The cell movement was evaluated by wound healing assay. Cell invasion and migration were determined by invasion assay in vitro. RESULTS： SNC19/ST14 gene overexpression could enhance invasion of colorectal cancer cells in vitro significantly and influence early cell adherence to ECM, but could not change cell movement significantly. CONCLUSION： SNC19/ST14 gene overexpression increases the local invasion of colorectal cancer cells in vitro. 2005 The WJG Press and Elsevier Inc. All rights reserved.

关键词： Gene SNC19/ST14 Colorectal cancer Invasion

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Bifunctional Mn-doped CoSe_(2) nanonetworks electrode for hybrid alkali/acid electrolytic H_(2) generation and glycerol upgrading

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Journal of Energy Chemistry 2022年第9期31卷 424-431,I0012页

作者： Linfeng Fan Yaxin ji Genxiang Wang Zhifang zhang Luocai Yi Kai Chen Xi Liu Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina School of Chemistry and Chemical Engineering Yulin UniversityYulin 719000ShaanxiChina University of Chinese Academy of Science Beijing 100049China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007FujianChina

Electrolytic water splitting,as a promising route to hydrogen(H_(2))production,is still confronted with the sluggish anodic oxygen evolution reaction(OER)and its less value-added O2 ***,we report a bifunctional electrode fabricated by in situ growth of Mn-doped CoSe_(2)nanonetworks on carbon fiber cloth(Mn-CoSe_(2)/CFC),which shows attractive electrocatalytic properties toward glycerol oxidation reaction(GOR)in alkali and hydrogen evolution reaction(HER)in acid.A flow alkali/acid hybrid electrolytic cell(fA/A-hEC)was then developed by coupling anodic GOR with cathodic HER with the Mn-CoSe_(2)/CFC bifunctional *** fA/A-hEC enables a rather low voltage of 0.54 V to achieve 10 mA cm^(-2),and maintain long-term electrolysis stability over 300-h operation at 100 mA cm^(-2)with Faraday efficiencies of over 99%for H_(2)and 90%for formate *** designed bifunctional electrode in such innovative fA/A-hEC device provides insightful guidance for coupling energy-efficient hydrogen production with biomass upgradation.

关键词： Mn-doped CoSe_(2)nanonetworks Glycerol upgrading electrooxidation Hydrogen production Bifunctional electrocatalytic electrode Hybrid flow alkali/acid electrolyzer

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Inverse Synthetic Aperture Radar Imaging of Multi-Targets Based on Image Processing Technique

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Journal of Harbin Institute of Technology(New Series) 2018年第6期25卷 46-58页

作者： Yong Wang Shuai feng Qingxiang zhang Research Institute of Electronic Engineering Technology Harbin Institute of Technology

This paper presents a newmulti-targets inverse synthetic aperture radar (ISAR) imaging approach via the image segmentation processing. This method can separate multi-targets with similar velocities,and there is no strict limit on the rotational state of the targets. Firstly,the motion compensation for the completely multi-targets echo is carried out and the coarse image can be achieved with the Range-Doppler (RD) technique. Then a series of image processing methods and image segmentation processing are used to separate the echo data of each mono-target. At last,the image with high quality of each target can be achieved with the RD technique and the Range-Instantaneous-Doppler (RID) technique. ISAR imaging results of simulated and measured data validate the validity of the proposed approach.

关键词： ISAR multi-targets image segmentation

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A novel surgical debridement technique for the treatment of Fournier’s gangrene

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Asian Journal of Andrology 2021年第5期23卷 541-542页

作者： Xiao-Hui Chen Peng-Pai Qin Zhong-Xing zhang ji-Yan Lin jing-jing zhang Department of Emergency Medicine The First Affiliated Hospital of Xiamen UniversityXiamen 361003China Division No.1 of Surgery Beijing Rectum HospitalBeijing 100035China Department of Cosmetic and Plastic Surgery Zhongshan Hospital Affiliated to Xiamen UniversityXiamen 361005China

Dear Editor,Fourniers gangrene(FG)is a life-threatening disease which is characterized by necrotizing fasciitis of the genital,perianal,and perineal *** was initially found in young healthy males in the late 1800s with the acute onset of fulminant idiopathic genital *** now,FG has been seen in people of different ages,from newborn babies to the elderly3.

关键词： Fournier acute treatment

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Msx2 plays a critical role in lens epithelium cell cycle control

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International Journal of Ophthalmology(English edition) 2013年第3期6卷 276-279页

作者： jiang-Yue Zhao feng-feng Zhuang Hong-Yan Wang Di Wu jin-Song zhang Eye Hospital of China Medical University Department of Ophthalmology the 4~(th) Affiliated Hospital of China Medical University Provincial Key Laboratory of Lens Research Department of Ophthalmology and Doheny Eye Institute Keck School of Medicine University of Southern California Department of General Surgery People's Hospital of Liaoning Province

AIM: To investigate the effects of Msx2 on lens epithelium cell cycle, and evaluate the changes of the proliferation, apoptosis of lens epithelium cells. METHODS: Mice lens epithelium cells were cultured and transfected with pEGFP-Msx2 and control. Msx2-deficient mice (Msx2(-/-)) lens tissue were isolated. Lens tissue and transfected cells were prepared for mRNA extraction using Trizol reagent. CyclinD1 and Prox1 expression were evaluated by real-time RT-PCR. BrdU incorporation and apoptosis rate were investigated by immunofluorescence and flow cytometry analysis. RESULTS: After transfected with pEGFP-Msx2, lens epithelium cells failed to incorporate BrdU and anti - phospho-histone-3 immunofluorescence failed to detect cell nuclei which GFP were positive. Msx2 over expression resulted in increasing apoptosis rate in lens epithelium cells. CyclinD1 and Prox1 expression increased significantly in Msx2 knockout mice by real time RT-PCR quantization and CyclinD1 expression decreased significantly in Msx2overexpressed cell. CONCLUSION: Msx2 has the effect of inhibiting proliferation and differentiation, triggering apoptosis on mice lens epithelium cells.

关键词： Msx2 lens epithelium cell cell cycle

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Seven New Drimane-Type Sesquiterpenoids from Cultures of Fungus Phellinus tuberculosus

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Natural Products and Bioprospecting 2014年第1期4卷 21-25页

作者： jiang-Bo He Tao feng Shen zhang Ze-Jun Dong Zheng-Hui Li Hua-jie Zhu ji-Kai Liu State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Seven new drimane-type sesquiterpennoids,phellinuins A-G(1-7),together with one known compound 3b,11,12-trihydroxydrimene(8)were isolated from the cultures of mushroom Phellinus *** structures were elucidated on the b... 详细信息

关键词： Phellinus tuberculosus Drimane-type sesquiterpennoids Phellinuins A–G

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Thermal insulation performance of 7YSZ TBCs adjusted via Al modification

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Rare Metals 2023年第3期42卷 994-1004页

作者： Jun-Gui zhang Xi Tan Xiu-Juan Fan jie Mao Chun-Ming Deng Min Liu Ke-Song Zhou Xiao-feng zhang Institute of New Materials The Key Lab of Guangdong for Modern SurfaceEngineering TechnologyGuangdong Academy of SciencesNational Engineering Laboratory of Modern Materials Surface Engineering TechnologyGuangzhou 510651China

ZrO_(2)-7 wt% Y_(2)O_(3)(7YSZ)thermal barrier coatings(TBCs)with three different structures were prepared by atmospheric plasma spraying(APS),electron beam physical vapor deposition(EB-PVD)and plasma spray-physical vapor deposition(PS-PVD).Al films were deposited onto the top 7YSZ TBCs by magnetron sputtering,and the Al-deposited 7YSZ TBCs were subjected to vacuum heat *** effects of Al modification on the thermal insulation properties of 7YSZ TBCs were *** results showed that Al modification could significantly improve the thermal insulation of 7YSZ TBCs at 1000℃.Moreover,the maximum improvement of thermal insulation for PS-PVD 7YSZ TBCs was approximately 100℃,but the improvement decreased with increasing *** is mainly because with increasing temperature,the rate of radiation heat transfer increases,and the effects of convection heat transfer and thermal conductivity on thermal insulation are *** the same temperature,Al modification of PS-PVD7YSZ TBCs provides better temperature insulation than those of APS 7YSZ TBCs and EB-PVD 7YSZ TBCs because of its wider and deeper inter-columnar *** the temperature was 12000C,Al modification still caused a good insulation effect in PS-PVD 7YSZ TBCs;the improvement was approximately 50℃,but in APS and EB-PVD 7YSZ TBCs,the insulation effect disappeared.

关键词： Al modification Thermal barrier coatings(TBCs) Thermal insulation Inter-columnar gap

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Concentration determination of gold nanoparticles by flame atomic absorption spectrophotometry

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Acta Geochimica 2021年第4期40卷 498-506页

作者： Yuhong Fu Quan Wan Zonghua Qin Shanshan Li Sen Li ji Wang Wei zhang School of Geographic and Environmental Sciences Guizhou Normal UniversityGuiyang 550025GuizhouChina State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081GuizhouChina CAS Center for Excellence in Comparative Planetology Hefei 230026AnhuiChina School of Chemistry and Materials Science Guizhou Normal UniversityGuiyang 550025GuizhouChina Research Center of Karst Ecological Civilization Guizhou Normal UniversityGuiyang 550025China

While engineered nanoparticles are widely used and maybe eventually released into the environment,natural nanoparticles are also commonly found in the Earth *** may critically affect the geochemical migration of associated elements and pose potential threats to the ecological *** is necessary to establish an accurate and reliable method for measuring the concentration of *** is one of the most commonly used methods for the concentration determination of ***,till now,there has been no systematic report on how experimental variables affect AAS *** this study,we used gold nanoparticles(AuNPs) as an example and studied the influences of a list of factors on the concentration determination of AuNPs by AAS,including digestion method,ionization interference,acidic medium,background correction method,and organic *** demonstrate that all these factors may have varying degrees of influence on the measured gold *** the gold colloid is digested at room temperature for more than 8 h or at 60℃ for more than 2 h,and the system contains a low concentration of organic matter,AAS can accurately measure the AuNP concentration at *** deuterium lamp background deduction method is not recommended to use for samples with lower gold concentrations.

关键词： Gold nanoparticles Atomic absorption spectrophotometry Quantitative analysis Organic matter

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Highly efficient Hg2+ removal via a competitive strategy using a Co-based metal organic framework ZIF-67

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Journal of Environmental Sciences 2022年第9期34卷 33-43页

作者： jiacheng Zhou Hao zhang Tianying Xie Ye Liu Qicheng Shen jie Yang Limei Cao ji Yang School of Resources and Environmental Engineering State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical ProcessEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The stronger coordination ability of mercury ions with organic ligands than the metal ions in metal organic framework(MOFs) provides an accessible way to separate mercury ions from solution using specific MOFs. In this study, a Co-based MOF(ZIF-67, Co(mIM)) was synthesized. It did not introduce specific functional groups, such as-SH and-NH, into its structure through complicated steps. It separate Hgfrom wastewater with a new strategy, which utilized the stronger coordination ability of Hgwith the nitrogen atom on the imidazole ring of the organic ligand than the Coions. Hgreplaced Conodes from ZIF-67 and formed a more stable precipitate with m IM. The experimental results showed that this new strategy was efficient. ZIF-67 exhibited Hgadsorption capacity of 1740 mg/g, much higher than the known MOFs sorbents. m IMs is the reaction center and ZIF-67 can improve its utilization. The sample color faded from purple to white due to the loss of cobalt ion. It is a great feature of ZIF-67 that allows users to judge whether the sorbent is deactivated intuitively. ZIF-67 can be sustainable recycled by adding organic ligands to the solution after treatment due to its simple synthesis method at room temperature. It’s a high-efficient and sustainable sorbent for Hgseparation from wastewater.

关键词： ZIF-67 Hg2+removal Coordination competition

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