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Zoological Research 2022年第5期43卷 750-755页

作者： Amael Borzee Yucheol Shin Nikolay APoyarkov Jong Yoon Jeon hae jun baek Chang Hoon Lee junghwa An Yoon Jee Hong Mi-Sook Min Laboratory of Animal Behaviour and Conservation College of Biology and the EnvironmentNanjing Forestry UniversityNanjingJiangsu 210037China Department of Biological Sciences School of Natural ScienceKangwon National UniversityChuncheon 24341Republic of Korea Department of Vertebrate Zoology Biological FacultyM.V.Lomonosov Moscow State UniversityMoscow 119234Russia Research Institute for Veterinary Science College of Veterinary MedicineSeoul National UniversitySeoul 08826Republic of Korea Animal Resources Division National Institute for Biological ResourcesIncheon 22689Republic of Korea

DEAR EDITOR,Species that are not formally described are generally not targets for conservation,regardless of their threatened *** habitat degradation has increased over the past several decades in the Republic of Kore... 详细信息

关键词： habitat endangered mountains

Effect of Squeeze Cast Process Parameters on Fluidity of Hypereutectic Al-Si Alloy

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Journal of Materials Science & Technology 2008年第1期24卷 7-11页

作者： Jong-Kyu baek hae-Wook Kwon School of Materials Science and Engineering Yeungnam University Gyeongsan 712-749 Korea

The effects of processing variables on the fluidity of hypereutectic Al-Si alloy melt during squeeze casting were *** maximum fluidity of Al-16.0%Si alloy during squeeze casting was obtained under the applied pressure of 30 *** fluidity increased with *** fluidity increased with silicon content in the range from 12.0% to 20.0%.That was decreased respectively by eutectic modification and primary silicon refinement.

关键词： Squeeze casting Al-alloy Fluidity Melt treatment

Synthesis of Fe_3O_4-coated silica aerogel nanocomposites

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中国有色金属学会会刊：英文版 2012年第S3期22卷 702-706页

作者： jun Sung LEE Eun jung LEE hae Jin HWANG Devision of Materials Science and Engineering Inha University

Fe3O4:SiO2 nanocomposite powders were synthesized by a two-step process,which included the precipitation of FeCl2 and FeCl3 and the gelation of silicic acid solution derived from water *** first,Fe3O4 nanoparticles having a crystallite size of 20 nm were obtained by controlling the ratio of Fe(II) and Fe(III) *** the second step,Fe3O4 particles were embedded in SiO2 matrix by the hydrolysis and subsequent condensation of the silicic acid solution containing Fe3O4 *** was found that the Fe3O4 nanoparticles homogenously disperse in the SiO2 *** Fe3O4:SiO2 nanocomposite exhibited an enhanced thermal stability against oxidation compared with pure ***-IR analysis indicates the presence of the Si-O-Fe bond in the Fe3O4:SiO2 (1:10,mole fraction) nanocomposite.

关键词： nanocomposite Fe3O4 SiO2 sol gel synthesis

Polysaccharide from Astragalus membranaceus promotes the activation of human peripheral blood and mouse spleen dendritic cells

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Chinese Journal of Natural Medicines 2021年第1期19卷 56-62页

作者： Lim Seong-Min Park hae-Bin Jin jun-O Department of Medical Biotechnology Yeungnam UniversityGyeongsan 38541South Korea Shanghai Public Health Clinical Center Shanghai Medical CollegeFudan UniversityShanghai201508China

Astragalus membranaceus(***)is a widely used traditional herb in China and *** polysaccharides(AMP),which make up a major part of the root extract,have been shown to modulate immune modulations,especially activation of bone marrow-derived dendritic cells(BMDCs)and T ***,the immune stimulatory effect of AMP in the mouse in vivo and human peripheral blood DCs(PBDCs)has not been well *** this study,we found that intravenous(i.v.)injection of AMP in C57 BL/6 mice induced remarkable elevations in co-stimulatory and MHC class I and II molecule levels in the splenic DCs and its *** stimulatory effect of DCs by AMP was elevated 6 h after treatment,which rapidly decreased 18 h after ***,AMP promoted intracellular production of pro-inflammatory cytokines in spleen DC subsets,which contributed elevation of serum cytokine ***,the AMP promoted PBDC ***,these results demonstrate that AMP can be used as an immune stimulatory molecules in human and mouse.

关键词： Astragalus membranaceus polysaccharide Spleen dendritic cell Human peripheral blood dendritic cell

Solution and Stability of a Cubic Functional Equation

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Acta Mathematica Sinica,English Series 2010年第7期26卷 1255-1262页

作者： Kil Woung jun Sang baek LEE Won Gil PARK Department of Mathematics Chungnam National University Department of Mathematics Education College of EducationMokwon University

In this paper, we investigate the general solution and the stability of a cubic functional equation f（x ＋ ny）＋ f（x - ny）＋ f（nx） = n^2 f（x ＋ y）＋ n^2 f（x - y）＋（n^3 - 2n^2 ＋ 2）f（x）,where n ≥ 2 i... 详细信息

关键词： Hyers-Ulam stability cubic functional equation alternative of fixed point

Regular moderate aerobic exercise improves high-fat diet-induced nonalcoholic fatty liver disease via monoacylglycerol O-acyltransferase 1 pathway suppression

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Journal of Sport and Health Science 2020年第5期9卷 472-478页

作者： Kyung-Wan baek Jeong-An Gim jung-jun Park Division of Sport Science Pusan National UniversityBusan 46241Korea Department of Biological Sciences College of Natural SciencesPusan National UniversityBusan 46241Korea

Purpose:Monoacylglycerol O-acyltransferase 1(MGAT1)is reported to play a key role in the development of diet-induced nonalcoholic fatty liver disease(NAFLD).Thus,this study investigated the effect of exercise on suppression of the MGAT1 pathway in NAFLD tissue of high-fat diet(HFD)-induced obese ***:Male Sprague-Dawley rats were fed an HFD containing 45%fat for 6 *** confirmation that NAFLD had been induced in the obese animals,they were divided into HFD-fed groups provided with exercise(HFD+EXE)or without exercise(HFD)and a group given dietary adjustment(DA)only,for a further 6 weeks of intervention *** 6-week regular moderate aerobic exercise consisted of an accommodation phase with increasing *** accumulation in the liver tissue was determined by Oil Red O *** MGAT1 and liver lipogenic gene mRNA levels were measured by qPCR,and their protein levels by western blot ***:Oil Red O staining showed that NAFLD was successfully induced by *** gene expression of MGAT1 was significantly lower in HFD+EXE than ***,there was no significant difference between HFD+EXE and *** protein expression of MGAT1 was significantly lower in HFD+EXE than both HFD and *** RNA and protein expression of other lipogenic genes were not different among *** data indicate that exercise suppresses MGAT1 pathway regardless of HFD feeding;in part,this effect could be greater than ***:Our data suggest that exercise can improve NAFLD,which is probably due to suppression of MGAT1 pathway.

关键词： Exercise High-fat diet Monoacylglycerol O-acyltransferase 1 Nonalcoholic fatty liver disease Obesity

Adaptive immunity of materials: Implications for tissue healing and regeneration

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Bioactive Materials 2024年第11期41卷 499-522页

作者： jung-Hwan Lee Seong-Jin Shin jun Hee Lee Jonathan CKnowles hae-Hyoung Lee hae-Won Kim Institute of Tissue Regeneration Engineering(ITREN) Dankook UniversityCheonan 31116Republic of Korea Department of Biomaterials Science College of DentistryDankook UniversityCheonan 31116Republic of Korea Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine Dankook UniversityCheonan 31116Republic of Korea Cell&Matter Institute Dankook UniversityCheonan 31116Republic of Korea Mechanobiology Dental Medicine Research Center Dankook UniversityCheonan 31116Republic of Korea UCL Eastman-Korea Dental Medicine Innovation Centre Dankook UniversityCheonan 31116Republic of Korea UCL Eastman Dental Institute University College LondonLondon NW32PXUnited Kingdom

Recent cumulative findings signify the adaptive immunity of materials as a key agenda in tissue healing that can improve regenerative events and outcomes. Modulating immune responses, mainly the recruitment and functions of T and B cells and their further interplay with innate immune cells (e.g., dendritic cells, macrophages) can be orchestrated by materials. For instance, decellularized matrices have been shown to promote muscle healing by inducing T helper 2 (Th2) cell immunity, while synthetic biopolymers exhibit differential effects on B cell responses and fibrosis compared decellularized matrices. We discuss the recent findings on how implantable materials instruct the adaptive immune events and the subsequent tissue healing process. In particular, we dissect the materials’ physicochemical properties (shape, size, topology, degradation, rigidity, and matrix dynamic mechanics) to demonstrate the relations of these parameters with the adaptive immune responses in vitro and the underlying biological mechanisms. Furthermore, we present evidence of recent in vivo phenomena, including tissue healing, cancer progression, and fibrosis, wherein biomaterials potentially shape adaptive immune cell functions and in vivo outcomes. Our discussion will help understand the materials-regulated immunology events more deeply, and offer the design rationale of materials with tunable matrix properties for accelerated tissue repair and regeneration.

关键词： Adaptive immunity Materials interactions Tissue healing Physicochemical properties Immune cell interplay

Plastic anisotropy calculation of severely-deformed Al-Mg-Si alloy considering texture changes in electron backscatter diffraction

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Journal of Materials Science & Technology 2019年第7期35卷 1439-1443页

作者： I Putu Widiantara hae Woong Yang Min jun Kim Young Gun Ko Plasticity Control & Mechanical Modeling Lab. School of Materials Science & Engineering Yeungnam University

The investigation studied the plastic anisotropy of the severely-deformed Al-Mg-Si alloy by considering texture *** sample deformed via asymmetrical rolling under cross-shear condition was annealed at 598 K where recrystallization was in *** is found upon annealing that the intensity of Cube({001})was comparable to those of plane-strain components while the intensities of shear components remained constant despite their instabilities in the recrystallization *** annealing,the average Lankford value(r)of the present sample was close to a unity whereas the in-plane anisotropy(△r)decreased,resulting in nearly isotropic characteristics of Al-Mg-Si alloy.

关键词： Al-Mg-Si alloy Anisotropy Recrystallization Microstructures

Kinetics modeling for the mixed reforming of methane over Ni-CeO_2/MgAl_2O_4 catalyst

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Journal of Natural Gas Chemistry 2011年第1期20卷 9-17页

作者： Hye Jin jun Myung-june Park Seung-Chan baek Jong Wook Bae Kyoung-Su Ha Ki-Won jun Department of Chemical Engineering Ajou University Petroleum Displacement Technology Research Center Korea Research Institute of Chemical Technology (KRICT)

Kinetics model was developed for the mixed （steam and dry） reforming of methane, which is useful for the control of H2/CO ratio. The equilibrium constants of reaction rate were determined using the experimental equilibrium data at different reaction temperatures, while the forward reaction rate constants were estimated using the experimental data under non-equilibrium （high inert fraction and high space velocity） conditions. The comparison between calculated and experimental data clearly showed that the developed model described satisfactorily, and further analysis using the parametric sensitivity determined the wall temperature and CO2 fraction in the feed gas as effective parameters for the manipulation of CH4 conversion and H2/CO ratio of synthesis gas under the equilibrium condition. Meanwhile, the inert fraction, rather than the residence time, was selected as additional parameter under non-equilibrium condition.

关键词： mixed reforming nickel-based catalyst kinetics modeling parameter estimation parametric sensitivity

Formation and Thermal Stability of Large Precipitates and Oxides in Titanium and Niobium Microalloyed Steel

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Journal of Iron and Steel Research International 2008年第3期15卷 70-77页

作者： ZHUO Xiao-jun WOO Dae-hee WANG Xin-hua LEE hae-geon Metallurgical and Ecological Engineering School University of Science and Technology Beijing Belling 100083 China Graduate Institute of Ferrous Technology Pohang University of Science and Technology Pohan4g 790 784 South Korea

As-cast CC slabs of microalloyed steels are prone to surface and sub-surface cracking. Precipitation phenomena initiated during solidification reduce ductility at high temperature. The unidirectional solidification unit is employed to simulate the solidification process during continuous casting. Precipitation behavior and thermal stability are systematically investigated. Samples of adding titanium and niobium to steels have been examined using field emission scanning electron microscope （FE-SEM）, electron probe X-ray microanalyzer （EPMA）, and transmission electron microscope （TEM）. It has been found that the addition of titanium and niobium to high-strength low-alloyed （HSLA） steel resulted in undesirable large precipitation in the steels, i. e. , precipitation of large precipitates with various morphologies. The composition of the large precipitates has been determined, The effect of cooling rate on （Ti, Nb）（C, N） precipitate formation is investigated. With increasing the cooling rate, titanium-rich （Ti,Nb）（C,N） precipitates are transformed to niobium-rich （Ti,Nb）（C,N） precipitates. The thermal stability of these large precipitates and oxides have been assessed by carrying out various heat treatments such as holding and quenching from temperature at 800 and 1 200℃. It has been found that titanium-rich （Ti,Nb）（C,N） precipitate is stable at about 1 200 ℃ and niobium-rich （Ti,Nb）（C,N） precipitate is stable at about 800 ℃. After reheating at 1 200℃ for 1 h, （Ca,Mn）S and TiN are precipitated from Ca-Al oxide. However, during reheating at 800 ℃ for l h, Ca-Al-Ti oxide in specimens was stable. The thermodynamic calculation of simulating the thermal process is employed. The calculation results are in good agreement with the experimental results.

关键词： carbonitride microsegregation dendritic region unidirectional solidification heat treatment thermal stability