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Improved electron capture capability of field-assisted exponential-doping GaN nanowire array photocathode

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Journal of Materials Science & Technology 2020年第7期42卷 54-62页

作者： Lei Liu feifei lu Sihao Xia Yu Diao Jian Tian Department of Optoelectronic Technology School of Electronic and Optical EngineeringNanjing University of Science and TechnologyNanjing 210094China

The exponential-doping GaN nanowire arrays(GaN NWAs)photocathode has a"light-trapping effect",and the built-in electric field can promote the concentration of the photogene rated carrier center to the top surface of the ***,in the preparation ofactual NWAs photocathodes,the problem that photons emitted from the sides of the nanowires cannot be effectively collected has been *** proposed field-assisted exponential-doping GaN NWAs can bend the motion trajectory of the emitted electrons toward the collecting *** this study,the quantum efficiency(QE)and collection efficiency(CE)of the external field-assisted exponential-doping GaN NWAs photocathode are derived based on the two-dimensional carrier diffusion equation and the initial energy and angular distribution,*** a field-assisted exponential-doping GaN NWAs with a width d=200 nm and a height H=400 nm,the optimal structural parameters are obtained:the incident angleθ=50°and the nanowire spacing is L=335.6 *** this basis,the field intensity of 0.5 V/μm can maximize the CE of the *** the results show that the field-assisted approach does contribute to the collection of emitted electrons,which can provide theoretical guidance for high-performance electron sources based on exponential-doping GaN NWAs *** field-assisted exponential-doping GaN NWAs cathode is expected to be verified by the experimental results in the future.

关键词： Exponential-doping GaN nanowire array Photocathode Field-assisted Quantum efficiency Electrons collection

Synthesis of magnetic polyphosphazene-Ag composite particles as surface enhanced Raman spectroscopy substrates for the detection of melamine

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Chinese Chemical Letters 2019年第12期30卷 2009-2012页

作者： Ci Huang feifei lu Ke Xu Guanjun Ding Lijun You Jiabin Wang Qiqing Zhang Institute of Biomedical and Pharmaceutical Technology College of Chemistry Fuzhou University

Magnetic polyphosphazene(MPZS) particles coated by Ag nanoparticles(MPZS-Ag) have been developed as surface enhanced Raman spectroscopy(SERS) substrates for sensitive detection of melamine in aqueous solutions and milk samples.5,5’-Dithiobis-(2-nitrobenzoic acid)(DTNB) was used as model analyte to test the SERS activity of the MPZS-Ag *** prepared MPZS-Ag particles possess both magnetic responsiveness and excellent SERS *** detection of different concentrations of melamine aqueous solutions and spiked milk samples were performed by the MPZS-Ag *** limit of detection(LOD) of the melamine in aqueous solutions was 10^-7 mol/L(0.0126 mg/L) and 0.6 mg/L in real milk samples using the MPZS-Ag particles as SERS *** LOD of the melamine are much lower than the safety values of Food and Drug Administration and Codex Alimentarius *** results indicate that the MPZS-Ag particles have promising application prospect for SERS analysis in food safety fields.

关键词： Polyphosphazene Magnetic polymer particles Surface enhanced Raman spectroscopy Ag nanoparticles Melamine detection

Single-cell transcriptome sequencing reveals the mechanism regulating rice plumule development

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The Crop Journal 2024年第3期12卷 688-697页

作者： Mingdong Zhu Meng Zhang Kunyong Huang feifei lu Hong Wang Shaolu Zhao Yinghong Yu Shaoqing Tang Haining Wu Peisong Hu Xiangjin Wei State Key Laboratory of Rice Biology and Breeding China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006ZhejiangChina b State Key Laboratory of Hybrid Rice Hunan Rice Research InstituteHunan Academy of Agricultural SciencesChangsha 410125HunanChina Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation College of BiologyHunan UniversityChangsha 410082HunanChina Hubei University Wuhan 430062HubeiChina

Seed plumules comprise multiple developing tissues and are key sites for above-ground plant organ ***,the spatial expression of genes in developing rice seed plumules was characterized by single-cell transcriptome sequencing in Zhongjiazao 17,a popular Chinese indica rice *** 15 cell clusters,13 were assigned to cell types using marker genes and cluster-specific *** genes of multiple cell types were expressed in several clusters,suggesting a complex developmental *** genes for signaling by phytohormones such as abscisic acid were highly expressed in specific *** cis-elements in the promoters of genes specifically expressed in cell clusters were calculated,and some key hormone-related motifs were frequent in certain *** expression patterns of genes involved in rapid seed germination,seedling growth,and development were *** findings enhanced our understanding of cellular diversity and specialization within plumules of rice,a monocotyledonous model crop.

关键词： Rice Plumule Single-cell sequencing Regulatory network

Nature of M-M bonding in Cp2MM′I2（M=B,Al,Ga,In,Tl,Cp=C5H5）

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Nature of M-M bonding in Cp2MM′I2（M=B,Al,Ga,In,Tl,Cp=C5H5）

Analyses on Research Status of CSR in the World

中国化学会第九届全国有机化学学术会议

作者： feifei lu Xiaoyan Li Bin lu College of Chemistry and Material Science Hebei Normal University

＜正＞The sandwich complexes have been applied into Olefin polymerization catalysis reaction,C-H activation reaction and biochemical reaction processes due to their interesting electronic structure

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Journal of Environmental Science and Engineering(B) 2015年第3期4卷 148-154页

作者： feifei lu Zuomin We Yu Xie Weiguo Jia College of Economics & Management Nanjing Forestry University Nanjing 210037 Jiangsu China Shandong Institute ofPomology Tai 'an 2 71000 Shandong China

Based on the web of Science database, such as the countries, research institutes, core authors, key journals and the distribution of research fields, the number of corporate social responsibility（CSR）, articles published during 20 years （1994 to 2013 ） in the world were analyzed by bibliometric method. The total of 1,544 articles and their top 20 countries, research institutes, core authors, key journals and research fields for the literature types, the number of annual articles was retrieved globally. Analyses of status and trends of CSR researches in the world based on bibliometrics were performed for providing information to CSR researchers and decision makers.

关键词： Corporate social responsibility (CSR) bibliometric citation analysis development trend

The Preparation and Catalytic Performance of Nanoporous CuO/CeO<sub>2</sub>Composites

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Journal of Materials Science and Chemical Engineering 2015年第7期3卷 154-161页

作者： Caihua Wei Xiaolong Zhang feifei lu Yanyan Song Zhanbo Sun School of Science Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an China

Nanoporous CuO/CeO2 ribbons are successfully prepared through dealloying melt-spun Al80-xCu20Cex (x = 0.5, 1, 2, 3, at%) alloy in a 5 wt% NaOH aqueous solution, followed by calcining in air. The samples are characterized by XRD, SEM, EDS, HRTEM, Raman and gas chromatograph. For the dealloyed melt-spun Al80-xCu20Cex (x = 0.5, 1, 2, 3, at%) alloy, the XRD results indicate that Cu and Cu2O are formed, while CuO and CeO2 are formed coupled with calcinations. The SEM shows that the CuO/CeO2 ribbons with a homogeneous pore/grain structure are thermally stable up to 600℃because uniform CeO2 particles are dispersedly loaded on the fine CuO grains of the porous structure, which is validated by TEM again. Meanwhile, the Raman spectra show that the concentration of oxygen vacancies reach a maximum value when the calcining temperature at 600℃. In addition, the gas chromatograph results show that the dealloyed Al78Cu20Ce2 ribbons with calcined at 600℃have the best active catalysis for CO oxidation and the rates of CO conversation reaching at 50% and 100% are 150℃and 320℃, respectively, owing to the synergetic effects of the CuO and CeO2 species.

关键词： Dealloying Nanoporous CuO CeO2 CO Oxidation

Transplantation of UC-MSCs on collagen scaffold activates follicles in dormant ovaries of POF patients with long history of infertility

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Science China(Life Sciences) 2018年第12期61卷 1554-1565页

作者： Lijun Ding Guijun Yan Bin Wang lu Xu Yan Gu Tong Ru Xiaoying Cui Lei Lei Jingyu Liu Xiaoqiang Sheng Bin Wang Chunxue Zhang Yanjun Yang Ruiwei Jiang Jianjun Zhou Na Kong feifei lu Huaijun Zhou Yannan Zhao Bing Chen Yali Hu Jianwu Dai Haixiang Sun Center for Reproductive Medicine Department of Obstetrics and Gynecologythe Affiliated Drum Tower Hospital of Nanjing University Medieal SchoolNanjing 210008China Clinical Center for Stem Cell Research the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008China Department of Obstetrics and Gynecology the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008China State Key Laboratory of Molecular Development Biology Institute of Genetics and Developmental BiologyChinese Academy of Sciences Beijing 100190China

Premature ovarian failure(POF) is a refractory disease for clinical treatment with the goal of restoring fertility. In this study,umbilical cord mesenchymal stem cells on a collagen scaffold(collagen/UC-MSCs) can activate primordial follicles in vitro via phosphorylation of FOXO3 a and FOXO1. Transplantation of collagen/UC-MSCs to the ovaries of POF patients rescued overall ovarian function, evidenced by elevated estradiol concentrations, improved follicular development, and increased number of antral follicles. Successful clinical pregnancy was achieved in women with POF after transplantation of collagen/UC-MSCs or UC-MSCs. In summary, collagen/UC-MSC transplantation may provide an effective treatment for POF.

关键词： premature ovarian failure collagen scaffold UC-MSCs primordial follicle activation granulosa cells FOXO3a FOXO1

OPAQUE3, encoding a transmembrane bZIP transcription factor, regulates endosperm storage protein and starch biosynthesis in rice

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Plant Communications 2022年第6期3卷 299-313页

作者： Ruijie Cao Shaolu Zhao Guiai Jiao Yingqing Duan Liuyang Ma Nannan Dong feifei lu Mingdong Zhu Gaoneng Shao Shikai Hu Zhonghua Sheng Jian Zhang Shaoqing Tang Xiangjin Wei Peisong Hu State Key Laboratory of Rice Biology China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006China Institute of Agricultural Science in Jiangsu Coastal Areas Yancheng 224002China

Starch and storage proteins are the main components of rice(Oryza sativa L.)*** their importance,the molecular regulatory mechanisms of storage protein and starch biosynthesis remain largely ***,we identified a rice opaque endosperm mutant,opaque3(o3),that overaccumulates 57-kDa proglutelins and has significantly lower protein and starch contents than the wild *** o3 mutant also has abnormal protein body structures and compound starch grains in its endosperm ***3(O3)encodes a transmembrane basic leucine zipper(bZIP)transcription factor(OsbZIP60)and is localized in the endoplasmic reticulum(ER)and the nucleus,but it is localized mostly in the nucleus under ER *** demonstrated that O3 could activate the expression of several starch synthesis-related genes(GBSSI,AGPL2,SBEI,and ISA2)and storage protein synthesis-related genes(OsGluA2,Prol14,and Glb1).O3 also plays an important role in protein processing and export in the ER by directly binding to the promoters and activating the expression of OsBIP1 and PDIL1-1,two major chaperones that assist with folding of immature secretory proteins in the ER of rice endosperm ***-temperature conditions aggravate ER stress and result in more abnormal grain development in o3 *** also revealed that OsbZIP50 can assist O3 in response to ER stress,especially under high-temperature *** thus demonstrate that O3 plays a central role in rice grain development by participating simultaneously in the regulation of storage protein and starch biosynthesis and the maintenance of ER homeostasis in endosperm cells.

关键词： grain development ER stress OPAQUE3 high temperature rice

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救援车载钻机平衡调速系统动态特性研究

煤矿安全 2023年第8期54卷 209-215页

作者：鲁飞飞煤炭科学研究总院北京100013 中煤科工西安研究院(集团)有限公司陕西西安710077

平衡阀具有较好的负载保持功能和管路爆裂或严重泄漏阻止移动载荷的失控发生的优点。然而在救援车载钻机给进起拔系统使用时,由于救援车载钻机配套钻具重量大,平衡系统的合理匹配是设计难题。提出了采用平衡调速系统加强制补油系统方案... 详细信息

平衡阀具有较好的负载保持功能和管路爆裂或严重泄漏阻止移动载荷的失控发生的优点。然而在救援车载钻机给进起拔系统使用时,由于救援车载钻机配套钻具重量大,平衡系统的合理匹配是设计难题。提出了采用平衡调速系统加强制补油系统方案,平衡调速系统实现提升下放速度平稳可控,强制补油可有效防止吸空情况,提高给进系统使用的安全和寿命;通过理论分析过平衡液压系统,建立系统动态模型,基于该模型,动态分析过平衡系统的压力流量特性,重点分析平衡阀参数对给进起拔系统动态特性的影响,并提出了过平衡系统参数匹配方法;通过台架试验对理论分析结果进行验证。结果表明:钻具质量对常规平衡系统输出有较大影响,在钻机给进起拔系统中设置过平衡调速系统,并合理匹配过平衡参数,可实现给进起拔系统的输出稳定性,同时避免吸空及速度失控的问题。

关键词：救援车载钻机给进系统平衡调速起拔系统动态特性加强制补油系统