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ElECTROCHEMICAl INVESTIGATION ON CARBON NANOTUBE FIlM wITH DIFFERENT PRETREATMENTS

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Acta Metallurgica Sinica(English letters) 2003年第4期16卷 295-301页

作者： C.G.Hu w.l.wang w.Zhu DepartmentofAppliedPhysics ChongqingUniversityChongaing400044China KeylaboftheEducationMinistryforPhotoelectricTechnologyandSystem ChongqingUniversityChongqing400044China DepartmentofChemistry ChongqingUniversityChongqing400044ChinaManuscriptreceived25November2002

wide potential windows were found at carbon nanotube film electrodes in neutral solutions after being treated with nitric acid and mixed acid. Electrochemical reversibility was investigated at carbon nanotube films with different pretreatments for ferri/ferrocyanide and quinone /hydroquinone. Carbon nanotube film electrodes presented quasi-reversible electrochemical behavior for both electrolytes. In the range of scan rate, carbon nanotube film electrodes treated with acids showed heterogeneous electron-transfer properties, which was mainly controlled by its electron state density on the surface of the film. On the whole, the carbon nanotube electrode with nitric acid treatment presented the best electrochemical behaviors, so we chose it as an analytical electrode to determine the trace compound in dilute solution. The results demonstrated that this new electrode material exhibits superior performance characteristics for the detection of azide anion.

关键词： carbon nanotubes cyclic voltammetry treatment azide anion

Trend setting research in “blue” and “green” directions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2016年第7期17卷 497-501页

作者： charles w.w.NG Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology

中国自然科学基金委员在2016年6月14日正式发布的《国家自然科学基金"十三五"发展规划》中明确指出,未来5年,基金委将重点支持与"绿色"(以环保为代表)和"蓝色"(以海洋、能源能为代表)相关的交叉学科研究。由于岩土地基是大多数环保和能... 详细信息

中国自然科学基金委员在2016年6月14日正式发布的《国家自然科学基金"十三五"发展规划》中明确指出,未来5年,基金委将重点支持与"绿色"(以环保为代表)和"蓝色"(以海洋、能源能为代表)相关的交叉学科研究。由于岩土地基是大多数环保和能源相关活动(如城市废弃物的填埋和覆盖、液岩气和海底天然气水合物的安全开采)的最终承载者,岩土工程师和环保、能源相关领域的学者在过去的30年里紧密合作,以应对人类在这两大领域所面对的严峻挑战,同时也催生了两个重要的交叉学科,即环境岩土和能源岩土。可以预见,随着环境污染和能源短缺等问题的日益凸显,针对环境岩土和能源岩土的深入研究显得愈发重要。以此为背景,香港科技大学主办了"第一届环境岩土和能源岩土国际会议(Ge Ge2015)",旨在提供一个交流平台,分享探讨以岩土工程科学问题为载体的环境、能源相关领域的最新研究进展和发展趋势。此次会议由浙江大学、河海大学、重庆大学和瑞士洛桑联邦理工大学(EPFl)协办,并得到了香港岩土工程学会、香港工程师协会岩土分会以及国际土力学与岩土工程协会下属两大技术委员会(TC215环境岩土和TC308能源岩土)的联合支持。参会人员包括多位外籍院士、"朗肯"讲座人、"太沙基"讲座人以及环境岩土和能源岩土领域的国内外优秀学者。为了分享此次国际会议的成果,会务组筛选了部分优秀的会议论文摘要,并邀请相关作者撰写成全文。经过国际同行专家的评审,最终8篇文章入选本期特刊。第二届和第三届环境岩土和能源岩土国际会议(Ge Ge2017和Ge Ge2019)将分别在浙江大学和瑞士洛桑联邦理工大学举行,继续探讨相关领域的突破性进展,为世界的可持续发展提供科技支撑。

关键词：十三五规划 “蓝绿”学科环境岩土能源岩土国际会议

Surface diffusivity of atomic deuterium on Ni_3(Al, Ti)(110) surface with and without boron

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中国有色金属学会会刊：英文版 2002年第4期12卷 649-652页

作者： J.l.wang Y.w.Chung DepartmentofMaterialsScienceandEngineering RobertR.McCormickSchoolofEngineeringandAppliedScienceNorthwesternUniversityEvanstonIL60208USA DepartmentofMaterialsScienceandEngineering RobertR.McCormic

The electron stimulated desorption was used to measure the surface diffusivity of atomic deuterium on clean and boron modified Ni 3(Al, Ti)(110) surfaces. Boron dosing was performed using a solid state boron ion source. Earlier studies showed that boron dissociates water readily at temperatures as low as 130?K and that the resulting atomic hydrogen is bound to the surface strongly. The surface diffusion coefficient of atomic D on 0.05 monolayer boron modified surface was measured to be about 10 times smaller than that on the clean surface. This slower diffusion of atomic hydrogen may explain why boron improves the ductility of polycrystalline Ni 3Al in moist environments.

关键词：氘原子表面扩散硼 Ni3Al Ni3Ti 金属间化合物

Gottfried Konecny:the ambassador of photogrammetry and remote sensing for 75 years

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Geo-Spatial Information Science 2021年第1期24卷 27-32,I0006页

作者： charles K.Toth Department of Civil Environmental and Geodetic EngineeringThe Ohio State UniversityColumbusOHUSA

A 90th birthday would be a milestone celebration for any person,but exceptionally rare if the person is still active after 75 years of working and serving the photogrammetric and remote sensing communities *** unprecedented career is the motivation to reflect on the technological developments of the past 75 years in the light of Gottfried Konecny’s lifetime achievements.I started to get to know Gottfried not long before he officially retired from the Institute for Photogrammetry and Engineering Surveys in ***,I was not even born when he,as a young and talented scholar supported by the Fulbright Scholarship from the US Government,arrived at the Ohio State University(OSU),which has been my professional home for three *** the second half of Gottfried’s 75-year career,the technological changes have been phenomenal,and,furthermore,shown an accelerating trend in the past few *** is absolutely remarkable how Gottfried has been able to keep up with these rapid changes and advancing technologies and exploits them for mapping and,in general,for all the users of the geospatial field at ***,his open-minded and kind personality has been always a major plus to his technical skills and experiences,and ultimately helped him assist many colleagues to advance their careers,and along the way developed and increased the use of geospatial data and systems in support of many countries worldwide.

关键词： Photogrammetry remote sensing space observation

Stepwise assembly to construct stable copper(I) cluster-based circularly polarized luminescent MOFs

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Science China Chemistry 2025年

作者： Jing-wen Xie Meng-Ting wang Yan Jin Si li Jian-Hua Qin Shuang-Quan Zang Tomas C.w.Mak College of Chemistry Henan Key Laboratory of Crystalline Molecular Functional Materials Zhengzhou University College of Chemistry and Chemical Engineering Luoyang Normal University Department of Chemistry The Chinese University of Hong Kong

Circularly polarized luminescence （CPl） materials have been extensively studied in recent years owing to their widespread applications in 3D display,optical storage,optical anti-counterfeiting,and biological imaging,***（I） clusters have emerged as a promising candidate for CPl materials,driven by their cost-effectiveness,superior luminescent properties,precise structure,and low ***,the poor environmental stability of copper（I） clusters renders their synthesis and preservation challenging,thereby significantly impeding their ***,we have designed and synthesised a chiral double-coordinated ligand in order to construct copper（I） cluster nodes that can be further *** anticipated,by utilizing stepwise assembly strategy,a Cu4cluster node co-modified by chiral alkynyl ligands and triphenylphosphine was further assembled with Cd2+ions to obtain 2D layers structure,l/*** l/D-Cu4-Cd exhibits excellent stability and optical properties,including bright yellow emission,solvent-responsive luminescence,and CPl activity with a maximum glumup to 2.0×10-3,which shows potential applications in the wlED and *** interestingly,the material also exhibits deflection ability towards different wavelengths of linearly polarized light,showing certain potential in the preparation of circular polarizer.

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Evaluating different routes of extracellular vesicle administration for cranial therapies

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Journal of Cancer Metastasis and Treatment 2020年第1期6卷 148-154页

作者： Pericles Ioannides Erich Giedzinski charles l.limoli Department of Radiation Oncology University of CaliforniaIrvineCA 92697-2695USA

Aim:Human stem cell-derived extracellular vesicles(EV)provide many advantages over cell-based therapies for the treatment of functionally compromised tissue beds and organ *** we aimed to highlight multiple administration routes for the potential treatment of various forms of brain ***:Human neural stem cell-derived EV were isolated from conditioned media and administered via three distinct routes:intrahippocampal transplantation,retro-orbital vein injection,and *** were administered after which brains were evaluated to determine the capability of EV to translocate into normal ***:Data showed no significant differences in the amount of EV able to translocate across the brain,indicating the functional equivalence of each administration route to effectively deliver EV to the brain ***:Findings show that both systemic administration routes(retro-orbital vein or intranasal delivery)afforded effective penetrance and perfusion of EV throughout the brain in a minimally invasive manner,and point to a translationally tractable option for treating certain neurological disorders including those resulting from cranial irradiation procedures.

关键词： Extracellular vesicles cranial therapy cognitive dysfunction

Rapid and Cost-Effective Gene Targeting in Rat Embryonic Stem Cells by TAlENs

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Journal of Genetics and Genomics 2012年第6期39卷 275-280页

作者： charles Ashton Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC Department of Cell and NeurobiologyKeck School of MedicineUniversity of Southern CaliforniaLos AngelesCA 90033USA

The rat is the preferred animal model in many areas of biomedical research and drug development. Genetic manipulation in rats has lagged behind that in mice due to the lack of efficient gene targeting tools. Previously, we generated a knockout rat via conventional homologous recombination in rat embryonic stern （ES） cells. Here, we show that efficient gene targeting in rat ES cells can be achieved quickly through transcription activator-like effector nuclease （TAlEN）-mediated DNA double-strand breaks. Using the Golden Gate cloning technique, we constructed a pair of TAlEN targeting vectors for the gene of interest in 5 days. After gene transfection, the targeted rat ES cell colonies were isolated, screened, and confirmed by PCR without the need of drug selection. Our results suggest that TAlEN-mediated gene targeting is a superior means of establishing genetically modified rat ES cell lines with high efficiency and short turnaround time.

关键词： TAl effector BMPR2 Rat ES cells Gene-targeting

Comparison of Velocity Shear with Turbulence Reduction Driven by Biasing in a Simple Cylindrical Slab Plasma

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Plasma Science and Technology 2010年第4期12卷 391-396页

作者： K.w.GENTlE K.lIAO K.lEE w.l.ROwAN Institute of Fusion Studies University of Texas at Austin

In an experimental realization of the sheared cylindrical slab, the level of plasma turbulence is strongly reduced by application of a sufficient bias potential difference in the radial direction. Density fluctuation levels △nrms/n decrease by more than a factor of five. The ion flow velocity profile is measured spectroscopically from the Doppler shift of an argon ion line. Comparison of the shearing rates with the turbulent amplitudes as a function of bias show no relation between the shearing rate and turbulence reduction, contrary to expectations.

关键词： turbulence suppression shear stabilization velocity shear bias

Antibiotic Resistance and Heavy Metals Tolerance in Gram-Negative Bacteria from Diseased American Bullfrog (Rana catesbeiana) Cultured in Malaysia

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Agricultural Sciences in China 2009年第10期8卷 1270-1275页

作者： M Najiah S w lee w wendy l w Tee M Nadirah S H Faizah Department of Fisheries Science and Aquaculture Faculty of Agrotechnology and Food Science Universiti Malaysia Terengganu Institute of Tropical Aquaculture Universiti Malaysia Terengganu Faculty of Agro Industry and Natural Resources Universiti Malaysia Kelantan

A total of 140 bacterial isolates have been successfully isolated from various organs of diseased American bullfrog （Rana catesbeiana） cultured in Malaysia. The most frequently isolated bacteria was Edwardsiella spp. （46 isolates） followed by Aeromonas spp. （33 isolates）, Flavobacterium spp. （31 isolates）, and Vibrio spp. （30 isolates）. Majority of the bacterial isolates were found sensitive to furazolidone （85.0%）, chloramphenicol （85.0%）, oxolinic acid （90.0%）, florfenicol （95.0%）, and flumequine （97.5%）. On the other hand, most of the bacterial isolates were resistant to oleandomycin （77.5%） and lincomycin （87.5%）. Nitrofurantoin and flumequine can be inhibited the growth of all of Vibrio spp. whereas all isolates of Edwardsiella spp. were found sensitive to florfenicol and flumequine. Multiple antibiotic resistance （MAR） index were in range of 0.30-0.40, indicating that bacterial isolates from cultured bullfrogs may have received high risk exposure to the tested antibiotics. In addition, 90-100% of the isolates were resistant to copper, cadmium, and chromium. These results provided insight information on tolerance level of bacterial isolates from cultured bullfrogs to 21 antibiotics as well as heavy metals.

关键词： Rana catesbeiana MAR index Edwardsiella Aeromonas Flavobaeterium Vibrio antibiotic resistance,heavy metal tolerance