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Effects of thickness of Al thermal spray coating for STS 304

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中国有色金属学会会刊：英文版 2009年第4期19卷 925-929页

作者： Min-Su HAN yong-bin woo Seok-Cheol KO Young-Jae JEONG Seok-Ki JANG Seong-Jong KIM Division of Marine Engineering Mokpo Maritime University Chungnam Regional Innovation Agency Jeonnam Techno Park

Thermal spray coating presents a sacrificial-anode cathodic protection method since differences between the potentials of materials are *** a base metal is exposed to seawater,due to defect in the thermal spray coating,the metal is protected by the sacrificial anodic characteristics of the coating layer because micro-cells formed by the base metal and the thermal spray coating act as cathodes and anodes,*** coating thickness has little effect on the surface morphology of the ***,the electrochemical properties with the increasing of coating thickness present good results.

关键词：涂层厚度热喷涂 STS 金属接触电化学性能保护方法牺牲阳极阳极涂层

High-resolution, high-speed, chromotropic color printing based on fs-laser-induced gold/graphene HSFLs

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Photonics Research 2025年第1期13卷 125-139页

作者： SHIRU JIANG woo-bin LEE STUART ABERDEEN SANG-SHIN LEE Department of Electronic Engineering Kwangwoon University Nano Device Application Center Kwangwoon University

Through achieving high-spatial-frequency laser-induced periodic surface structures （HSFLs） on a gold/graphene hybrid film,we introduce a high-speed,high-resolution,and wide-gamut chromotropic color printing *** method effectively addresses the trade-off between throughput and resolution in laser *** realize Au HSFL,disordered lattice structures and high transmittance of amorphous Au （a-Au） thin film are used to overcome the rapid hot-electron diffusion and loss of plasmonic coherence typically observed on low-loss metal surfaces,*** with crystallization in Au and modulated surface plasmon polaritons by artificial"seed"pre-structure growing in a SiO2/Si substrate,HSFL emerged with a period of 100 nm on crystalline Au after single and rapid femtosecond laser *** equips the proposed color printing with highresolution and high-speed features *** addition,the crystallization process is demonstrated to initiate change in the complex refractive index of Au,which causes wide-gamut *** chromotropic capability,which facilitates the background color to be tailored in color as well as into desirable shapes independently,enables three-level anti-counterfeiting based on the proposed color ***,the proposed color printing is amenable for practical implementation in diverse applications,including security marking and data storage,ranging from nanoscale to large-scale fabrication.?2024 Chinese Laser Press

关键词： Chemical vapor deposition Electron beam lithography Localized surface plasmon resonance Scanning electron microscopy Thin films Ultrafast lasers

Ecological and anthropogenic factors influencing mammal species distribution in Htamanthi Wildlife Sanctuary,Myanmar

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Journal of Mountain Science 2025年第2期22卷 575-591页

作者： Myo Min LATT Jonathan O.HERNANDEZ woo bin YOUN Byung Bae PARK Department of Environment and Forest Resources Chungnam National UniversityDaejeon 34134Republic of Korea Department of Natural Resources and Management University of Forestry and Environmental ScienceYezinNaypyitaw 15013National Unity Government of the Republic of the Union of Myanmar Department of Forest Biological Sciences College of Forestry and Natural ResourcesUniversity of the Philippines Los BañosLos Baños 4031Philippines

Mammal distribution is shaped by different ecological and anthropogenic factors,and the pattern varies depending on their sensitivity thresholds,food and habitat preferences,ecological roles,and physical *** present study investigated the influence of ecological and anthropogenic factors on the distribution of mammal species communities across different trophic levels and body sizes in Myanmar's Htamanthi Wildlife Sanctuary(HWS).The values of mammal characteristics,ecological,and anthropogenic factors were analyzed in ArcMap *** of the large and small sized mammals,whose distribution decreases with elevation,were observed near the main *** mammal tropic levels,the omnivores and herbivores were mostly observed farther from gold mining *** terms of forage plant effect on mammal community,floral forage plants and the presence of climber negatively affected mammal species across different trophic ***,presence of resin trees also has a substantial impact on the distribution of medium-large animals and omnivorous mammals as trophic niche ***,our findings highlight the crucial role that ecological and anthropogenic factors play in shaping mammal distribution in the *** underscores the importance of simultaneously conserving both habitat and mammal diversity in HWS,especially in the face of a changing climate and environment.

关键词： Camera trap survey Ecological niche Forage plants Habitat diversity Mammal communities Ranger patrol survey

Effects of dietary Lactobacillus postbiotics and bacitracin on the modulation of mucosaassociated microbiota and pattern recognition receptors affecting immunocompetence of jejunal mucosa in pigs challenged with enterotoxigenic F18^(+)Escherichia coli

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Journal of Animal Science and Biotechnology 2025年第1期16卷 282-299页

作者： Marcos Elias Duarte Zixiao Deng Sung woo Kim Department of Animal Science North Carolina State University116 Polk HallCampus Box 7621RaleighNC 27695USA

Background Enterotoxigenic Escherichia coli(***)is a threat to humans and animals that causes intestinal *** resistance has urged alternatives,including Lactobacillus postbiotics,to mitigate the effects of enterotoxigenic *** Forty-eight newly weaned pigs were allotted to NC:no challenge/no supplement;PC:F18^(+)*** chal-lenge/no supplement;ATB:F18^(+)*** challenge/bacitracin;and LPB:F18^(+)*** challenge/postbiotics and fed diets for 28 *** d 7,pigs were orally inoculated withF18^(+)*** d 28,the mucosa-associated microbiota,immune and oxidative stress status,intestinal morphology,the gene expression of pattern recognition receptors(PRR),and intestinal barrier function were *** were analyzed using the MIXED procedure in SAS *** PC increased(P<0.05)Helicobacter mastomyrinus whereas reduced(P<0.05)Prevotella copri and ***-corea compared to *** LPB increased(P<0.05)*** and Dialister succinatiphilus compared with *** ATB increased(P<0.05)Propionibacterium acnes,Corynebacterium glutamicum,and Sphingomonas pseudosanguinis compared to *** PC tended to reduce(P=0.054)PGLYRP4 and increased(P<0.05)TLR4,CD14,MDA,and crypt cell proliferation compared with *** ATB reduced(P<0.05)NOD1 compared with *** LPB increased(P<0.05)PGLYRP4,and interferon-γand reduced(P<0.05)NOD1 compared with *** ATB and LPB reduced(P<0.05)TNF-αand MDA compared with *** TheF18^(+)*** challenge compromised intestinal *** increased beneficial bacteria show-ing a trend towards increasing the intestinal barrier function,possibly by reducing the expression of PRR ***-tobacillus postbiotics enhanced the immunocompetence of nursery pigs by increasing the expression of interferon-γand PGLYRP4,and by reducing TLR4,NOD1,and CD14.

关键词： Escherichia coli Immunocompetence Intestinal health Pattern recognition receptors Pigs

Immortalization of epidural fat-derived mesenchymal stem cells: In vitro characterization and adipocyte differentiation potential

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World Journal of Stem Cells 2025年第1期17卷 40-52页

作者： Seoung-woo Lee Young-Ju Lim Hee-Yeon Kim Wansoo Kim wook-Tae Park Min-Jung Ma Junho Lee Min-Soo Seo Young In Kim Sangbum Park Seong-Kyoon Choi Gun woo Lee Core Protein Resources Center Daegu-Gyeongbuk Institute of Science and TechnologyDaegu 42988South Korea Department of Orthopedic Surgery Yeungnam University Medical CenterYeungnam University College of MedicineDaegu 42415South Korea Department of Veterinary Pathology College of Veterinary MedicineKyungpook National UniversityDaegu 41566South Korea School of Life Science BK21 FOUR KNU Creative BioResearch GroupKyungpook National UniversityDaegu 41566South Korea Laboratory of Veterinary Tissue Engineering College of Veterinary MedicineKyungpook National UniversityDaegu 41566South Korea College of Veterinary Medicine Kyungpook National UniversityDaegu 41566South Korea Department of Veterinary Tissue Engineering Kyungpook National UniversityDaegu 41566South Korea Cellexobio. Ltd.Daegu 42415South Korea Michigan State University Institute for Quantitative Health Science&EngineeringEast LansingMI 48824United States Department of Orthopedic Surgery Yeungnam University College of MedicineDaegu 42415South Korea

BACKGROUND Mesenchymal stem cells(MSCs)are promising candidates for regenerative therapy due to their self-renewal capability,multilineage differentiation potential,and immunomodulatory *** molecular characteristics of MSCs are influenced by their ***,epidural fat(EF)and EF-derived MSCs(EF-MSCs)have garnered attention due to their potential benefits to the spinal microenvironment and their high expression of neural SC ***,their clinical applications are limited due to cell senescence and limited accessibility of *** many studies have attempted to establish an immortalized,stable SC line,the characteristics of immortalized EF-MSCs remain to be *** To establish and analyze stable immortalized *** The phenotypes of EF-MSCs were analyzed using optical *** immortalization was performed using lentiviral *** biomolecular characteristics of the cells were analyzed by immunoblotting,quantitative PCR,and *** The immortalized EF-MSCs demonstrated a significantly extended lifespan compared to the control group,with well-preserved adipogenic potential and SC surface marker *** of human telomerase reverse transcriptase genes markedly increased the lifespan of *** analysis revealed substantial increase in the expression of DNA replication pathway components in immortalized *** Immortalized EF-MSCs exhibited significantly enhanced proliferative capacity,retained adipogenic potential,and upregulated the expression of DNA replication pathway components.

关键词： Immortalization Transfection Stem cell Epidural fat Proteomics

Interaction of Ca^(2+)and Fe^(3+)in co-precipitation process induced by Virgibacillus dokdonensis and its application

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Journal of Environmental Sciences 2025年第1期147卷 131-152页

作者： Huaxiao Yan Yuping Liu Haojuan Zhang Shengping Jin Zuozhen Han Jusun woo Maurice E.Tucker Long Meng Xiangqun Chi Chao Han Yanyang Zhao Yueming Zhao Hui Zhao College of Chemical and Biological Engineering College of Earth Science and EngineeringShandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary MineralsShandong University of Science and TechnologyQingdao 266590China Laboratory for Marine Mineral Resources Center for Isotope Geochemistry and GeochronologyQingdao National Laboratory for Marine Science and TechnologyQingdao 266237China School of Earth and Environmental Sciences Seoul National UniversitySeoul 08826Korea School of Earth Sciences University of BristolBristol BS81RJUK Cabot Institute University of BristolCantock’s CloseBristol BS81UJUK Qingdao West Coast New District First High School Qingdao 266555China

Biomineralization has garnered significant attention in the field of wastewater treatment due to its notable cost reduction compared to conventional *** reinjection water from oilfields containing an exceedingly high concentration of calcium and ferric ions will pose amajor hazard in ***,the utilization of biomineralization for precipitating these ions has been scarcely investigated due to limited tolerance among halophiles towards such extreme *** this study,free and immobilized halophiles Virgibacillus dokdonensis were used to precipitate these ions and the effects were compared,at the same time,biomineralizationmechanisms and mineral characteristicswere further *** results showthat bacterial concentration and carbonic anhydrase activitywere higher when additionally adding ferric ion based on calcium ion;the content of protein,polysaccharides,deoxyribonucleic acid and humic substances in the extracellular polymers also increased compared to *** ions were biomineralized into calcite and vaterite with mul-tiple *** to iron doping,the crystallinity and thermal stability of calcium carbonate decreased,the content of O-C=O,N-C=OandC-O-PO_(3) increased,the stable carbon isotope values became much more negative,andβ-sheet in minerals *** calcium concentrations facilitated ferric ion precipitation,while ferric ions hindered calcium *** immobilized bacteria performed better in ferric ion removal,with a precipitation ratio exceeding 90%.Free bacteria performed better in calcium removal,and the precipitation ratio reached a maximum of 56%.This research maybe provides some reference for the co-removal of calcium and ferric ions from the oilfield wastewater.

关键词： Calcium carbonate Calcium ion Ferric ion Biomineralization Co-removal Immobilization

Novel transparent high-entropy sesquioxide ceramics with high physicochemical plasma etching resistance

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JOURNAL OF ADVANCED CERAMICS 2025年第1期14卷 163-176页

作者： Shin, Yu-bin Ham, Su Been Kim, Ha-Neul Kim, Mi-Ju Ko, Jae-woong Lee, Jae-wook Park, Young-Jo Kim, Jung-Hyung Lee, Hyo-Chang Jung, Young Hwa Lee, Jung woo Ma, Ho Jin Korea Inst Mat Sci Nano Mat Res Div Chang Won 51508 Gyeongsangnam South Korea Pusan Natl Univ Dept Mat Sci & Engn Pusan 46241 South Korea Korea Res Inst Stand & Sci Semicond Integrated Metrol Team Daejeon 34113 South Korea Korea Aerosp Univ Dept Semicond Sci Engn & Technol Goyang 10540 South Korea Korea Aerosp Univ Sch Elect & Informat Engn Goyang 10540 South Korea Pohang Accelerator Lab PLS II Beamline Div Pohang 37673 South Korea

High-entropy ceramics exhibit novel intrinsic properties. Hence, they have been explored for a wide range of applications ranging from thermal insulation and energy storage to advanced optical components. Recently, the semiconductor industry has faced a demand for higher-performance chips, necessitating higher aspect ratios in wafer fabrication and further miniaturization of linewidths. Therefore, novel materials with high plasma etching resistance and minimal contaminant generation are needed. The plasma-etching resistance displayed by high-entropy ceramics can be an innovative solution to this emerging challenge. In this study, we successfully fabricated single-phase high-entropy sesquioxide ceramics with high optical transparency, dense microstructure, and minimal residual pores. A structural analysis of the fabricated samples revealed a single-phase structure with excellent phase homogeneity. An evaluation of the plasma-etching resistance of high-entropy ceramics revealed for the first time a low etching rate of 8 nm/h compared with that of conventional plasma-resistant materials. These comprehensive characterizations of high-entropy ceramics indicate that they are promising candidates for significantly improving the production yield of semiconductors and for a wide range of potential applications, such as next-generation active optical ceramics.

关键词： high-entropy ceramics plasma etching resistance transparent ceramics sintering semiconductor manufacturing

Effect of pulse time on surface characteristics and corrosion resistance during pulse electrochemical polishing

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中国有色金属学会会刊：英文版 2012年第S3期22卷 876-880页

作者： Young-bin KIM Jeong-woo PARK Department of Advanced Parts and Materials Engineering Chosun University Department of Mechanical Design Engineering Chosun University

Pulse electrochemical polishing (PECP) was used to improve the mechanical properties,such as surface roughness and corrosion resistance,of conductive metallic *** can provide a smooth,bright,reflective,and deburred surface that exhibits superior corrosion *** this work,stainless steel was used as the anode,and copper was used as the cathode due to their low electrical *** surface roughness of the PECP sample was measured by atomic force microscopy (AFM).A scanning electron microscope (SEM) was used to observe surface characteristics,and an Auger electron spectroscope (AES) was used to analyze the metallurgical composition and thickness of the passive *** aim of this research was to compare the corrosion resistance rates of the unprocessed and PECP-processed stainless steel.

关键词： stainless stell pulse electrochemical polishing corrosion resistance

Characteristics of machined surface controlled by cutting tools and conditions in machining of brittle material

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中国有色金属学会会刊：英文版 2009年第B9期19卷 194-201页

作者： yong-woo KIM Soo-Chang CHOI Jeung-woo PARK Deug-woo LEE Department of Nano Fusion Technology Pusan National University Department of Mechanical Design Engineering Chosun University Department of Nanosystem and Nanoprocess Engineering Pusan National University

One of the ultra-precision machining methods was adapted for brittle material as well as soft material by using multi-arrayed diamond tips and high speed spindle. Conventional machining method is too hard to control surface roughness and surface texture against brittle material because the particles of grinding tools are irregular size and material can be fragile. Therefore, we were able to design tool paths and machine controlled pattern on surface by multi-arrayed diamond tips with uniform size made in MEMS fabrication and high speed spindle, and the maximum speed was about 3×105 r/min. We defined several parameters that can affect the machining surface. Those were multi-array of diamond tips (n×n), speed of air spindle and feeding rate. The surface roughness and surface texture can be controlled by those parameters for micro machining.

关键词：加工表面脆性材料条件控制刀具路径表面粗糙度特征高速主轴加工方法