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Silica-quaternary ammonium “Fixed-Quat” nanofilm coated fiberglass mesh for water disinfection and harmful algal blooms control

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Journal of Environmental Sciences 2019年第8期31卷 213-224页

作者： Daniela Diaz Jared Church Mikaeel Young Keug Tae kim Jungsu Park Yun Bin Hwang Swadeshmukul Santra Woo Hyoung Lee Department of Civil Environmental and Construction Engineering University of Central Florida NanoScience Technology Center University of Central Florida Burnett School of Biomedical Sciences University of Central Florida Department of Environmental & Energy Engineering Suwon University K-water Institute Korea Water Resources Corporation Department of Material Science and Engineering 4000 Central Florida Blvd University of Central Florida Department of Chemistry 4111 Libra Drive University of Central Florida

Intensification of pollution loading worldwide has promoted an escalation of different types of disease-causing microorganisms, such as harmful algal blooms(HABs), instigating detrimental impacts on the quality of receiving surface waters. Formation of unwanted disinfection by-products(DBPs) resulting from conventional disinfection technologies reveals the need for the development of new sustainable alternatives. Quaternary Ammonium Compounds(QACs) are cationic surfactants widely known for their effective biocidal properties at the ppm level. In this study, a novel silica-based antimicrobial nanofilm was developed using a composite of silica-modified QAC(Fixed-Quat) and applied to a fiberglass mesh as an active surface via sol–gel technique. The synthesized Fixed-Quat nanocoating was found to be effective against E. coli with an inactivation rate of 1.3 × 10^(-3) log reduction/cm min. The Fixed-Quat coated fiberglass mesh also demonstrated successful control of Microcystis aeruginosa with more than 99% inactivation after 10 hr of *** developed antimicrobial mesh was also evaluated with wild-type microalgal species collected in a water body experiencing HABs, obtaining a 97% removal efficiency. Overall,the silica-functionalized Fixed-Quat nanocoating showed promising antimicrobial properties for water disinfection and HABs control, while decreasing concerns related to DBPs formation and the possible release of toxic nanomaterials into the environment.

关键词： Fiberglass mesh HAB mitigation Nanocoating Quaternary ammonium compounds(QACs) Silica-functionalization Water disinfection

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In vitro Cyto and Blood Compatibility of Titanium Containing Diamond-Like Carbon Prepared by Hybrid Sputtering Method

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Plasma Science and Technology 2012年第9期14卷 829-836页

作者： Krishnasamy NAVANEETHA PANDIYARAJ Jan HEEG Andreas LAMPKA Fabian JUNGE Torsten BARFELS Marion WIENECKE Young Ha RHEE Hyoung Woo kim Department of Physics Sri Shakthi Institute of Engineering and Technology Institute of Surface and Thin Film Technology Hochschule WismarGermany Department of Microbiology College of Bioscience&BiotechnologyChungnam National University

In recent years, diamond-like carbon films （DLC） have been given more attention in research in the biomedical industry due to their potential application as surface coating on biomedical materials such as metals and polymer substrates. There are many ways to prepare metal containing DLC films deposited on polymeric film substrates, such as coatings from car- bonaceous precursors and some means that incorporate other elements. In this study, we in- vestigated both the surface and biocompatible properties of titanium containing DLC （Ti-DLC） films. The Ti-DLC films were prepared on the surface of poly （ethylene terephthalate）（PET） film as a function of the deposition power level using reactive sputtering technique. The films＇ hydrophilicity was studied by contact angle and surface energy tests. Their surface morphology was studied by scanning electron microscopy （SEM） and atomic force microscopy （AFM）. Their elemental chemical composition was analyzed using energy dispersive X-spectra （EDX） and X-ray photoelectron spectroscopy （XPS）. Their blood and cell compatibility was studied by in vitro tests, including tests on platelet adhesion, thrombus formation, whole blood clotting time and osteoblast cell compatibility. Significant changes in the morphological and chemical composition of the Ti-DLC films were observed and found to be a function of the deposition level. These morphological and chemical changes reduced the interfacial tension between Ti-DLC and blood proteins as well as resisted the adhesion and activation of platelets on the surface of the Ti-DLC films. The cell compatibility results exhibited significant growth of osteoblast cells on the surface of Ti incorporated DLC film compared with that of DLC film surface.

关键词： Ti-DLC hybrid reactive sputtering technique surface analysis cyto and blood compatibility

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The Tendency of the Market and Technology of the Magnetic Materials in Korea

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Journal of Materials Science & Technology 2000年第2期16卷 217-220页

作者： C.O.kim and Y.Li (Engineering College, Chungnam National University, Korea) Chungnam Natl Univ Coll Engn Taejon South Korea

The magnetic materials industry in Korea started from the production of the ferrite and alnico magnet at the end of 1970s. At that time, most electronic company in Korea imported the equipment parts and made them up. As one of electronic equipments, its development dropped behind other countries. In 1980s, with the revaluing upward of Japanese yen and the increment of the domestic need in Korea, several new magnet manufacturing plants were built up.

关键词： The Tendency of the Market and Technology of the Magnetic Materials in Korea

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Introduction of Facility and Technology for Fuel Assembly Endurance, Vibration and Hydraulic Test

Introduction of Facility and Technology for Fuel Assembly En...

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The Fifth China-Korea Workshop on Nuclear Reactor Thermal Hydraulics

作者： Chang-Hwan Shin Kang-Hee Lee Young-Ho Lee Bok-Deuk kim Se-Young Chun dong-Seok Oh Nam-Gyu Park Kang-Hoon kim Jung-Min Suh Korea Atomic Energy Research Institute Korea Electric Power Cooperation-Nuclear Fuel Daedeok-daero 989-111 Yuseong-gu Daejeon KOREA

For a development procedure of an LWR fuel assembly, the accomplishment of a performance target must be verified through out-of-pile tests of a fuel assembly and its components. KAERI constructed a test facility to measure and analyze the pressure loss, the lift force, the flow induced vibration and the fretting wears as well as to verify the compatibility of difference fuel assemblies in a transient reactor core. This test facility of the fuel assemblies is named PLUTO from Performance Test Facility for Fuel Assembly Hydraulics and Vibrations. The design pressure and temperature of the PLUTO are 4 MPa, and 250 oC, and the maximum operating conditions are 3.5 MPa and 210 oC, respectively. The primary circulation loop consists of the main circulation pumps, two test sections, and an expansion tank, a main heat exchanger and auxiliary systems. Flow in the loop is provided by 4 non-seal canned motor pumps in a parallel arrangement, and maximum flow rate is 1400 m3/hr. This paper briefly introduces the PLUTO facility and reports the comprehensive verification results.

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蓝色金融的机遇与国际实践——访国际金融公司东亚及太平洋局局长林金思(kim-See Lim)

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中国金融 2022年第23期 24-26页

作者：贾瑛瑛张黎黎林金思不详国际金融公司(IFC)东亚及太平洋局

蓝色金融作为一个新兴领域,正在受到全球投资者、金融机构、监管部门及其他市场参与者越来越多的关注。在促进海洋系统与清洁水资源可持续发展、提升海洋适应气候变化的韧性等方面,蓝色金融能够发挥重要作用,有着巨大的发展空间。多年来... 详细信息

蓝色金融作为一个新兴领域,正在受到全球投资者、金融机构、监管部门及其他市场参与者越来越多的关注。在促进海洋系统与清洁水资源可持续发展、提升海洋适应气候变化的韧性等方面,蓝色金融能够发挥重要作用,有着巨大的发展空间。多年来,世界银行集团国际金融公司(IFC)通过开展投资、提供咨询服务以及参与制定相关标准等方式。

关键词：世界银行集团国际金融公司金融机构市场参与者咨询服务蓝色金融适应气候变化

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重组带状疱疹疫苗在美国50岁及以上成人中的保护效果:基于数据库的队列研究

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中华医学杂志 2022年第12期102卷 896-896页

作者：郝飞(编译) Sun Y kim E Kong CL 重庆医科大学附属第三医院皮肤科不详

1994—2018年,带状疱疹(HZ)发病率每年升高3.1%,发病率从286/10万人年上升到579/10万人年。重组带状疱疹疫苗(RZV)预防带状疱疹的保护效力已在临床试验中被验证超过90%,而在真实世界中RZV预防效果尚未被研究。由于临床研究和临床实践存... 详细信息

1994—2018年,带状疱疹(HZ)发病率每年升高3.1%,发病率从286/10万人年上升到579/10万人年。重组带状疱疹疫苗(RZV)预防带状疱疹的保护效力已在临床试验中被验证超过90%,而在真实世界中RZV预防效果尚未被研究。由于临床研究和临床实践存在明显差异,如疫苗接种者的健康状况、HZ诊断方法等,因此评估RZV在真实世界中的保护效果至关重要。因此,研究者通过真实世界OLDW(OptumLabs Data Warehouse)数据库,设计回顾性队列研究,以评估RZV对50岁及以上且无免疫功能受损人群的有效性。

关键词：免疫功能受损回顾性队列研究带状疱疹疫苗接种临床试验临床实践真实世界保护效力

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Dual function of a high-contrast hydrophobic-hydrophilic coating for enhanced stability of perovskite solar cells in extremely humid environments

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Nano Research 2017年第11期10卷 3885-3895页

作者： Jin Sun Yoo Gill Sang Han Seongha Lee Min Cheol kim Mansoo Choi Hyun Suk Jung Jung-Kun Lee School of Advanced Materials Science amp Engineering Sungkyunkwan University Suwon 440-746 Republic of Korea Department of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh Pennsylvania 15261 USA Department of Mechanical and Aerospace Engineering Seoul National University Seoul 08826 Republic of Korea

In spite of a continuous increase in their power conversion efficiency （PCE） and an economically viable fabrication process,organic-inorganic perovskite solar cells （PSCs） pose a significant problem when used in practical applications：They show fast degradation of the PCE when exposed to very humid *** this study,the stability of PSCs under very humid conditions is greatly enhanced by coating the surface of the PSC devices with a multi-layer film consisting of ultrahydrophobic and relatively hydrophilic layers.A hydrophobic composite of poly（methyl methacrylate）（PMMA）,polyurethane （PU）,and SiO2 nanoparticles successfully retards the water molecules from very humid ***,the hydrophilic layer with moderately PMMA captures the residual moisture within the perovskite layer;subsequently,the perovskite layer *** dual function of the coating film keeps the PCE of PSCs at 17.3% for 180 min when exposed to over 95% humidity.

关键词： perovskite solar cell stability surface coating ultrahydrophobic self-recovery

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Synthesis of Al-doped ZnO Nanorods via Microemulsion Method and Their Application as a CO Gas Sensor

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Journal of Materials Science & Technology 2015年第6期31卷 639-644页

作者： Sang Kyoo Lim Seong Hui Hong Sung-Ho Hwang Won Mi Choi Soonhyun kim Hyunwoong Park Min Gi Jeong Division of Nano & Bio Technology Daegu Gyeongbuk Institute of Science and Technology(DGIST) School of Energy Engineering Kyungpook National University Department of Advanced Organic Materials Engineering Yeungnam University

Aluminum doped ZnO(AZO) nanorods were synthesized by microemulsion method with different types of *** phase and the morphology of the above nanorods were investigated by scanning electron microscopy(SEM) and X-ray diffraction(XRD).SEM observations showed that the ZnO nanorods had diameters around about 50—200 nm and lengths up to several *** CO gas sensing properties of the AZO nanorods were tested at operating temperatures of 200,300,350 and 400 ℃.It was found that AZO nanorods based sensor exhibited the highest sensitivity to CO at 350℃.

关键词： Zinc oxide Nanorod Microemulsion Aluminum CO and g

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药芯组成及工艺参数对ENiCrMo3T0-4药芯焊丝气孔敏感性的影响

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稀有金属材料与工程 2018年第4期47卷 1205-1209页

作者：王恒栗卓新 Wolfgang Tillmann kim Hee Jin 北京工业大学北京100124 多特蒙德工业大学韩国工业技术研究院

采用体式显微镜、优化设计软件研究了ENiCrMo3T0-4药芯焊丝中药芯组成及工艺参数对气孔敏感性的影响。结果表明:随着焊丝药芯组成中SiO_2/ZrO_2、TiO_2/ZrO_2、(TiO_2+ZrO_2+SiO_2)/MnO的减小,气孔敏感性降低;气体流量的改变对焊缝表面... 详细信息

采用体式显微镜、优化设计软件研究了ENiCrMo3T0-4药芯焊丝中药芯组成及工艺参数对气孔敏感性的影响。结果表明:随着焊丝药芯组成中SiO_2/ZrO_2、TiO_2/ZrO_2、(TiO_2+ZrO_2+SiO_2)/MnO的减小,气孔敏感性降低;气体流量的改变对焊缝表面针眼气孔数的影响不大,但气体流量过小会产生条虫状气孔;当焊接电压25 V、焊接电流160 A、干伸长量20 mm时,焊缝金属针眼气孔数最少,焊丝气孔敏感性最低;增大固液相温度区间及氢在高温熔渣中的溶解度,可以降低焊缝金属气孔敏感性。

关键词：镍基药芯焊丝药芯组成工艺参数气孔敏感性

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Calcineurin-B-Like Protein CBL9 Interacts with Target Kinase CIPK3 in the Regulation of ABA Response in Seed Germination

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Molecular Plant 2008年第2期1卷 238-248页

作者： Girdhar K. Pandey John J. Grant Yong Hwa Cheong Beom-Gi kim Le Gong Li Sheng Luan Department of Plant and Microbial Biology University of California Berkeley CA 94720 USA Department of Plant Molecular Biology University of Delhi South Campus Benito Juarez Road New Delhi-110021 India Present address: Department of Bio-Environmental Science Sunchon National University Suncheon Jeonnam 540-742 Korea Present address: Department of Molecular Physiology and Biochemistry National institute of Agricultural Biotechnology Suwon 441-707 Korea

Calcium plays a vital role as a second messenger in many signaling pathways in plants. The calcineurin B-like proteins （CBLs） represent a family of plant calcium-binding proteins that function in calcium signaling by interacting with their interacting protein kinases （CIPKs）. In our previous study, we have reported a role for one of the CBLs （CBL9） and one of the CIPKs （CIPK3） in ABA signaling. Here, we have shown that CBL9 and CIPK3 physically and functionally interact with each other in regulating the ABA responses. The CBL9 and CIPK3 proteins interacted with each other in the yeast two- hybrid system and when expressed in plant cells. The double mutant cbl9cipk3 showed the similar hypersensitive response to ABA as observed in single mutants （cbl9 or cipk3）. The constitutively active form of CIPK3 genetically complemented the cbl9 mutant, indicating that CIPK3 function downstream of CBL9. Based on these findings, we conclude that CBL9 and CIPK3 act together in the same pathway for regulating ABA responses.

关键词： ABA calcium CBL CIPK osmotic stress signal transduction.

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