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Red Emission of Eu（lll） Complex Based on 1-（7-（ferf-butyl）-g-ethyl-gH- carbazol-2-yl）-4,4,4-trifluorobutane-l,3-dione Excited by Blue Light

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Chinese Journal of Chemical Physics 2012年第6期25卷 697-702,I0004页

作者： sheng-gui Liu wen-yi Su Rong-kai Pan Xiao-ping Zhou School of Chemistry Science and Technology Zhanjiang Normal University Zhanjiang 524048 China

A new Eu（III） complex, EuL3（phen）, was synthesized, where L is the abbreviation of de- protonated 1-（7-（tert-butyl）-9-ethyl-gH-carbazol-2-yl）-4,4,4-trifluorobutane-l,3-dione （HL）, phen is the abbreviation of 1,10-phenanthroline. The Eu（III） complex was characterized by element analysis, IR, 1H NMR, UV-visible absorption spectroscopy, thermogravimetric anal- ysis （TGA）, and photoluminescence measurements （PL）. TGA shows that thermal stability of the complex is up to 325 ~C. PL measurement indicates that the Eu（III） complex exhibits intense red-emission and extends their excitation bands to visible region. LEDs device was successfully fabricated by precoating complex EuL3 （phen） onto 460 nm blue-emitting InGaN chip. The emission of device shows that the complex can act as red phosphor in combination with 460 nm blue-emitting chips. This europium complex based on 1-（7-（tert-butyl）-9- ethyl-9H-carbazol-2-yl）-4,4,4-trifluorobutane-l,3-dione is a kind of interesting red-emitting material excited by blue light, which could avoid the damage of excitation by UV light.

关键词： Carbazole fl-diketone Lanthanide complex Chemical synthesis Luminescence

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广州市区职业女性的体育行为与体育态度

体育学刊 2002年第6期9卷 35-37页

作者：盛慧萍杨文轩周爱光上海财经大学体育教学部上海200433 华南师范大学体育科学学院广东广州510631

对广州市区不同年龄层次的职业女性进行问卷调查 ,通过对她们体育行为、体育态度的研究 ,了解广州市区职业女性体育现实的基本情况。指出了目前广州市区职业女性体育所取得的成绩及存在的问题 ,探求了产生这些问题的原因 ,并提出了相应... 详细信息

对广州市区不同年龄层次的职业女性进行问卷调查 ,通过对她们体育行为、体育态度的研究 ,了解广州市区职业女性体育现实的基本情况。指出了目前广州市区职业女性体育所取得的成绩及存在的问题 ,探求了产生这些问题的原因 ,并提出了相应的对策。

关键词：体育行为体育态度成绩基本情况层次问卷调查职业女性市区不同年龄广州市

Direct Numerical Simulation of Particle Migration in a Simple Shear Flow

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Chinese Physics Letters 2011年第8期28卷 187-190页

作者： LV Hong TANG sheng-Li ZHOU wen-ping Department of Power Engineering Chongqing UniversityChongqing 400044

Motion of a rectangular particle in a two-dimensional vertical shear flow of Newtonian fluid and viscoelastic fluid with different parameters is studied using the finite element arbitrary Lagrangian–Eulerian domain *** results show that the centerline of the channel is a stable equilibrium position for the neutrally buoyant rectangular particle in a vertical shear *** causes the particle to migrate towards the centerline of the *** addition,a critical elasticity number *** the elasticity number is below the critical value,the rectangular particle migrates to the centerline;otherwise the centerline of the channel is apparently no longer a global attractor of trajectories of the particle.

关键词： flow rectangular elasticity

ShRNA-mediated gene silencing of β-catenin inhibits growth of human colon cancer cells

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World Journal of Gastroenterology 2007年第48期13卷 6581-6587页

作者： wen-sheng Huang Jian-ping Wang Ting Wang Jie-Yu Fang ping Lan Jin-ping Ma Surgery Department The First Affiliated Hospital Sun Yat-sen University Guangzhou 510080 Guangdong Province China

AIM: To observe the gene silencing mediated by the specific shRNA targeted against β-catenin and its effect on cell proliferation and cycle distribution in the human colon cancer cell line Colo205. METHODS: Two shRNA plasmid vectors against β-catenin were constructed and transfected into Colo205 cells with LipofectamineTM2000. The down-regulations of β-catenin, c-myc and cyclinD1 expressions were detected by RT-PCR and western blot analysis. The cell proliferation inhibitions were determined by MTT assay and soft agar colony formation assay. The effect of these two β-catenin shRNAs on cell cycle distribution and apoptosis was examined by flow cytometry. RESULTS: These two shRNA vectors targeted against β-catenin efficiently suppressed the expression of β-catenin and its down stream genes, c-myc and cyclinD1. The expression inhibition rates were around 40%-50% either at the mRNA or at the protein level. The shRNA-mediated gene silencing of β-catenin resulted in significant inhibition of cell growth both on the culture plates and in the soft agar. Moreover, the cancer cells showed significant G0/G1 arrest and increased apoptosis at 72 h post transfection due to gene silencing. CONCLUSION: These specific shRNAs targeted against β-catenin could have a gene silencing effect and block the WNT signaling pathway. They could inhibit cell growth, increase apoptosis, and induce cell cycle arrest in Colo205 cells. ShRNA interference against β-catenin is of potential value in gene therapy of colon cancer.

关键词： β-catenin RNA interference Apoptosis Colon cancer WNT

Experimental study on desorption of soluble matter as influenced by cations in static water

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Water Science and Engineering 2014年第4期7卷 384-394页

作者： wen-sheng XU Li CHEN Xiao-xia TONG Xiao-ping CHEN ping-cang ZHANG Division of Soil and Water Conservation Changjiang River Scientific Research Institute State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

With variation of drainage basin environments, desorption of soluble matter has become one of the significant erosion processes in rivers. It has a considerable impact on flow and sediment transport, as well as processes of river bed deformation and landform evolution throughout a watershed. In this study, considering influences on sediment movement, especially on cohesive sediment transport, Ca^2＋ and H^＋ were chosen as characteristic ions of soluble matter, and the total desorption quantity of Ca^2＋ and pH value when the desorption equilibrium is reached were employed as two indexes representing the desorption of soluble matter. By means of an indoor experiment, desorption of soluble matter as influenced by cations in static water was investigated. The results show that the total desorption quantity of soluble matter increases with the initial cation concentration until a maximum desorption quantity value is obtained and maintained. The total desorption quantity of soluble matter depends on properties of the specific cations in static water, and the stronger the affinity is between the cation and sediment surface, the higher the total desorption quantity will be. Finally, a strong approximate linear relationship between desorption quantities for different kinds of soluble matters was obtained, which means that variation of pH values can accurately reflect the desorption results of soluble matter.

关键词： soluble matter desorption cation sediment static water indoor experiment

Two new phenolic compounds from Ardisia gigantifolia

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Chinese Chemical Letters 2008年第6期19卷 693-695页

作者： Zhu Yang ping wen Nai Li Wang Xin sheng Yao College of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 China Shenzhen Key Laboratory for New Drugs Research of Traditional Chinese Medicines Research Institute of Tsinghua University Shenzhen 518057 China

Two new compounds were isolated from the 60% ethanol extract of the dried rhizome of Ardisia gigantifolia Stapf. The structures were elucidated on the basis of spectroscopic methods as （＋）-5-（1,2-dihydroxypentyl）... 详细信息

关键词： Ardisia gigantifolia Stapf Phenolic compounds 5-(1,2-Dihydroxypentyl)benzene-1,3-diol

Recent advances in bioinspired vision systems with curved imaging structures

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Rare Metals 2024年第4期43卷 1407-1434页

作者： Ze-ping He Xun Han wen-Qiang Wu Zhang-sheng Xu Cao-Feng Pan CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing100049China ZJU-Hangzhou Global Scientific and Technological Innovation Center School of Micro-Nano ElectronicsZhejiang UniversityHangzhou311200China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen518060China

Limited by the planar imaging structure,the commercial camera needs to introduce additional optical elements to compensate for the curved focal plane to match the planar image *** results in a complex and bulky *** contrast,biological eyes possess a simple and compact structure due to their curved imaging structure that can directly match with the curved focal *** by the structures and functions of biological eyes,curved vision systems not only improve the image quality,but also offer a variety of advanced ***,we review the recent advances in bioinspired vision systems with curved imaging ***,we focus on their applications in implementing different functions of biological eyes,as well as the emerging curved neuromorphic imaging systems that incorporate bioinspired optical and neuromorphic processing *** addition,the challenges and opportunities of bioinspired curved imaging systems are also discussed.

关键词： Bioinspired Curved vision system Compound eye Chambered eye Neuromorphic

Synergistic effects of total ionizing dose and radiated electromagnetic interference on analog-to-digital converter

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Nuclear Science and Techniques 2022年第3期33卷 172-180页

作者： ping Wu Lin wen Zhi-Qian Xu Yun-sheng Jiang Qi Guo Cui Meng Department of Engineering Physics Tsinghua UniversityBeijing 100084China Laboratory of Particle and Radiation Imaging Ministry of EducationBeijing 100084China Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Functional Materials and Devices for Special Environments Urumqi 830011China

The influence of combined total ionization dose(TID)and radiated electromagnetic interference(EMI)in a commercial analog-to-digital converter(ADC)was *** degradation of the direct-current response,the static parameters,and the dynamic parameters caused by the TID and EMI separately and synergistically is *** experimental results demonstrate that the increase in TID intensifies data error and the signal-tonoise ratio(SNR)degradation caused by radiated *** cumulative distribution function of EMI failure with respect to data error and SNR with different TIDs was *** decreasing trend of the threshold was acquired with a small sample size of five for each TID *** result indicates that the ADC is more sensitive in a compound radiation environment.

关键词： Integrated circuit Total ionizing dose Electromagnetic radiation Synergistic effect Combined environment

Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

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Tungsten 2025年第1期 1-31页

作者： Qiao Xie Ying-Jie Yu Hai-Jun Zhang Ya-ping Deng wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

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