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Statistics of oxidation resistance of Ni-(0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0-5)Ti-(0-10)Ta-0.1C-0.01B superalloys at 1000℃ by compositional variations

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Rare Metals 2020年第8期39卷 918-927页

作者： Si-Jun Park Kyu-Hyuk Lee seong-Moon seo Hi-Won Jeong Young-Soo Yoo HeeJin Jang Multi-Material Research Center Gwangju-Jeonnam DivisionKorea Automotive Technology InstituteGwangju 62207Republic of Korea Department of Advanced Materials Engineering Chosun UniversityGwangju 61452Republic of Korea High Temperature Materials Group Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

The effects of alloying elements(Co,Cr,Mo,W,Al,Ti,and Ta)on the oxidation resistance of Ni-(0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0-5)Ti-(0-10)Ta-0.1 C-0.01 B alloys were *** sample compositions were designed by the Box-Behnken method of design of experiments(DOE).The alloying elements show complicated effects on the mass gain due to oxidation,depending on the alloy *** reduces the mass gain *** other elements except Al do not appear to exert a strong effect on the oxidation rate on average,but their influences are shown clearly in the alloys with a low Al ***,W,and Ta reduce the oxidation rate,while Cr,Mo,and Ti promote *** is the most effective element in reducing the oxidation rate of the alloy with a low Al *** is confirmed that a continuous Al2O3 layer is essentially required for high oxidation *** oxide scale of easily oxidized alloys has various oxides such as NiCr2O4,NiAl2O4,NiO,Cr2O3,CrTaO4,and TiO2.

关键词： High temperature oxidation Alloy composition Ni-based superalloy Oxidation resistance Design of experiments

Effects of acupuncture stimulation on brain activation induced by cue-elicited alcohol craving

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Neural Regeneration Research 2022年第5期17卷 1059-1064页

作者： Hyeok Gyu Kwon seong Hun Choi Joon Ho seo Chae Ha Yang Mi Young Lee Department of Physical Therapy College of Health ScienceEulji UniversityGyeonggiRepublic of Korea Department of Anatomy and Histology College of Oriental MedicineDaegu Haany UniversityGyeongsanRepublic of Korea Department of Rehabilitation Gyeongbuk Regional Rehabilitation HospitalGyeongsanRepublic of Korea Department of Physiology College of Korean MedicineDaegu Haany UniversityDaeguRepublic of Korea Department of Physical Therapy College of Biomedical ScienceDaegu Haany UniversityGyeongsanRepublic of Korea

Acupuncture has been shown to be effective on alcohol use ***,the underlying mechanism remains poorly *** investigate the effects of Shenmen(HT7)acupoint on brain activation induced by cue-elicited alcohol craving,30 right-handed healthy light to moderate alcohol drinkers were recruited from the *** were randomly assigned to undergo acupuncture either at HT7(experimental acupoint,n=15)or Jingqu(LU8,control acupoint,n=15)*** randomized controlled study was performed in Daegu Haany University and Daegu-Gyeongbuk Medical Innovation Foundation,Republic of *** and data collection were conducted from December 2018 to May *** results showed that after acupuncture at HT7 acupoint,the activation of orbitofrontal cortex and dorsolateral prefrontal cortex was greatly increased,while the activation of dorsolateral prefrontal cortex was obviously reduced,and subject's craving for alcohol was reduced when he/she seeing alcohol-related video clips involving various alcohols(beer,wine,or soju)or drinking *** at HT7 more greatly reduced subject's alcohol cravings than acupuncture at LU8 *** findings suggest that acupuncture can improve the self-control of mild to moderate social drinkers through the activation of the orbitofrontal cortex and dorsolateral prefrontal cortex,thereby reducing the craving for *** study protocol was approved by the Institutional Review Board of Daegu Haany University Korean Medicine Hospital,Republic of Korea(approval ***-D-18026-PRO-02)on November 30,2018.

关键词： acupuncture addiction alcohol brain activation craving cue functional MRI Shenmen(HT7)acupoint

New approach of medicinal herbs and sulfasalazine mixture on ulcerative colitis induced by dextran sodium sulfate

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World Journal of Gastroenterology 2020年第35期26卷 5272-5286页

作者： Mi-Rae Shin Hae-Jin Park Bu-Il seo seong-Soo Roh Department of Herbology Korean Medicine CollegeDaegu Haany UniversitySuseong-guDeagu 42158South Korea DHU Bio Convergence Testing Center Gyeongsan-siGyeongsangbuk-do 38610South Korea

BACKGROUND Sulfasalazine has been used as a standard-of-care in ulcerative colitis for decades,however,it results in severe adverse symptoms,such as hepatotoxicity,blood disorders,male infertility,and ***,the new treatment strategy has to enhance pharmacological efficacy and stimultaneously minimize side *** To compare the anti-inflammatory action of sulfasalazine alone or in combination with herbal medicine for ulcerative colitis in a dextran sodium sulfate(DSS)-induced colitis mouse *** To induce ulcerative colitis,mice received 5%DSS in drinking water for 7 *** were divided into five groups(n=9 each)for use as normal(non-DSS),DSS controls,DSS+sulfasalazine(30 mg/kg)-treatment experimentals,DSS+sulfasalazine(60 mg/kg)-treatment experimentals,DSS+sulfasalazine(30 mg/kg)+Citrus unshiu peel and Bupleuri radix mixture(30 mg/kg)(SCPB)-treatment *** The SCPB treatment showed an outstanding effectiveness in counteracting the ulcerative colitis,as evidenced by reduction in body weight,improvement in crypt morphology,increase in antioxidant defenses,down-regulation of proinflammatory proteins and cytokines,and inhibition of proteins related to *** may represent a promising alternative therapeutic against ulcerative colitis,without inducing adverse effects.

关键词： Dextran sulfate sodium Ulcerative colitis Anti-inflammatory Sulfasalazine Citrus unshiu peel and Bupleuri radix mixture Apoptosis

Regression of gastric endoscopic submucosal dissection induced polypoid nodular scar after Helicobacter pylori eradication:A case report

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World Journal of Clinical Cases 2022年第34期10卷 12793-12798页

作者： Byung Chul Jin Ae Ri Ahn seong-Hun Kim Seung Young seo Department of Internal Medicine Jeonbuk National University Medical SchoolResearch Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University HospitalJeonju 54907South Korea Department of Pathology Jeonbuk National University Medical SchoolResearch Institute of Clinical Medicine of Jeonbuk National UniversityBiomedical Research Institute of Jeonbuk National University Hospitaland Research Institute for Endocrine SciencesJeonju 56445South Korea

BACKGROUND Endoscopic submucosal dissection(ESD)is the treatment of choice for early gastric cancer and premalignant gastric *** some cases,ESD induced ulcer heals as a polypoid nodular scar(PNS).These scars may make the physicians raise several clinical implications such as post-ESD neoplastic *** SUMMARY We described a case of gastric ESD induced PNS which is regressed after Helicobacter pylori(***)eradication.A 58-year-old male patient was referred to the outpatient clinic for evaluation and treatment of gastric low-grade dysplasia(LGD).ESD was performed.A PNS was developed at the ESD *** endoscopic biopsy was done and there was no histological evidence of remnant tumor or recurrence but a hyperplastic mucosal *** PNS showed increase in size in follow-up endoscopy,and the biopsy specimen demonstrated *** *** eradication was done and the PNS was *** *** eradication is considerable for the regression of PNS if *** infesta tion is confirmed.

关键词： Polypoid nodular scar Helicobacter pylori Endoscopic submucosal dissection Case report

Optical Switching of a Quantum Cascade Laser in Continuous Wave Operation

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Chinese Physics Letters 2010年第1期27卷 268-270页

作者： Gang Chen seong-wook Park I-Chun A. Chen Clyde G. Bethea Rainer Martini Department of Physics and Engineering Physics Stevens Institute of Technology Castle Point on Hudson Hoboken N3 07030 USA College of Optoelectronic Engineering Chongqing University Chongqing 400044

We demonstrate an optical switching in a middle infrared continuous-wave quantum cascade laser operated in single mode by illuminating its front facet with a near infrared laser. A decrease in the laser net gain is observed in the amplified spontaneous emission spectrum. This is attributed to an increase of the carrier concentration caused by the near infrared excitation. The net gain reduction allows the quantum cascade laser to be completely switched off from single mode lasing. This optical switching can be used to convert near infrared signals into middle infrared signals for free space communication.

关键词： Chinese climate network complex systems small world community

Light-stabilized FHA2 suppresses miRNA biogenesis through interactions with DCL1 and HYL1

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Molecular Plant 2021年第4期14卷 647-663页

作者： Seung Jun Park Suk Won Choi Gu Min Kim Christian Moller Hyun-Sook Pai seong wook Yang Department of Systems Biology College of Life Science and BiotechnologyYonsei UniversitySeoul 120749Korea EDepartment of Systems Biology Institute of Life Science and BiotechnologyYonsei UniversitySeoul 120-749Korea Department of Plant and Environnental Sciences Faculty of ScienceUniversity of CopenhagenThorvaldsensvei 40DK-1871 FrederiksbergCopenhagenDenmark Pohang University of Science and Technology(POSTECH) 77 Cheongam-RoNam-GuPohangGyeongbuk37673.Korea These authors contributed equally to this article.

The precise regulation of microRNA(miRNA)biogenesis is crucial for plant development,which requires core microprocessors and many fine tuners to coordinate their miRNA processing activity/specificity in fluctuating cellular *** de-etiolation,light triggers a dramatic accumulation of core microprocessors and primary miRNAs(pri-miRNAs)but decreases pri-miRNA processing activity,resulting in relatively constant miRNA *** mechanisms underlying these seemingly contradictory regulatory changes remain *** this study,we identified forkhead-associated domain 2(FHA2)as a light-stabilized suppressor of miRNA *** found that FHA2 deficiency increased the level of mature miRNAs,accompanied by a reduction in pri-miRNAs and target *** assays showed that FHA2 associates with the core microprocessors DCL1,HYL1,and SE,forming a complex to suppress their pri-miRNA processing *** analyses revealed that FHA2 promotes HYL1 binding but inhibits the binding of DCL1-PAZ-RNase-RNA-binding domains(DCL1-PRR)to miRNAs,whereas FHA2 does not directly bind to these ***,we found that FHA2 protein is unstable in the dark but stabilized by light during ***,disruption of FH A led to defects in light-triggered changes in miRNA expression and reduced the survival rate of deetiolated seedlings after prolonged light ***,these data suggest that FHA2 is a novel light-stabilized suppressor of miRNA biogenesis and plays a role in fine-tuning miRNA processing during de-etiolation.

关键词： miRNA biogenesis Suppressor of the microprocessor miRNA-biogenetic inconsistency

Purifying behavior of photocatalytic TiO_2 anodized in nitrate ion containing solution

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中国有色金属学会会刊：英文版 2009年第4期19卷 1027-1030页

作者： Jin-wook CHOI seong-Eun LEE Byung-Gwan LEE Yong-Soo JEONG Han-Jun OH Choong-Soo CHI School of Advanced Materials Engineering Kookmin University Korea Institute of Materials Science Department of Materials Science Han seo University

Mesoporous titanium dioxide films were fabricated on titanium plates by micro-arc oxidation *** increase the photocatalytic activity of the films,NH4NO3 was added to the H2SO4 solution,and anodizing was carried out at high voltages using a DC power *** crystal structure,chemical composition,surface morphology and the optical property of the films were investigated by XPS,XRD,UV-VIS spectroscopy and *** photocatalytic activity of the films was evaluated by the decomposition of aniline blue,and the activity of the films for the degradation turned out to be improved by the additives to the electrolyte *** enhanced photocatalytic activity might result from the increased porosity and nitrate ion incorporation into the anodic films by micro arcing,and thereby the TiO2 layer might exhibit an improved absorption property for the visible light.

关键词：二氧化钛硝酸溶液盐离子催化行为氧化钛薄膜光催化活性 H2SO4溶液净化

Formation behavior of anodic TiO_2 nanotubes in fluoride containing electrolytes

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中国有色金属学会会刊：英文版 2009年第4期19卷 842-845页

作者： Byung-Gwan LEE Jin-wook CHOI seong-Eun LEE Yong-Soo JEONG Han-Jun OH Choong-Soo CHI School of Advanced Materials Engineering Kookmin University Korea Institute of Materials Science Department of Materials Science Han seo University

TiO2 nanotube layers can be formed with titanium in the electrolytes containing fluoride by electrochemical *** role of fluoride ion,the crystallinity of the anodic oxide,and the chemical state were *** results show the anodic film is composed of oxide and a little amount of *** presence of F- ions leads to chemical dissolution of Ti oxide layer and prevents hydroxide ***,chemical dissolution rate increases with increasing the fluoride content in the range of 0-2%(in mass fraction) because F- ions in electrolyte attack the interface and allow the ions of the electrolyte to easily penetrate into the *** as-anodized TiO2 nanotubes exhibit an amorphous *** treated nanotubes are composed of mixtures of the anatase and rutile phases.

关键词： TiO2纳米管阳极氧化处理氟离子电解质行为二氧化钛化学溶解电化学方法

S/S+ Band Tunable Thulium Doped Fiber Laser Anchored on 50 GHz ITU-T Grid

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光学学报 2003年第S1期23卷 381-382页

作者： Jonghan Park seong Joon Ahn Hoseong seo Namkyoo Park seoul National University Rm 301-1101 School of EECS Shilim Kwanak Seoul KoreaDivision of Electronics Sunmoon University.Korean Research Institute of Standards and ScienceSeoul National University Rm 301-1101 School of EECS Shilim Kwanak Seoul Korea

We demonstrate a S/S+ band tunable thulium doped fiber laser (TTDFL) anchored on 50GHz ITU-T Grid. Over 57nm of tuning range (1454.9 ~ 1512.0 nm) covering most of the Thulium bandwidth and more than 8dBm output power ... 详细信息

关键词： ITU Band Tunable Thulium Doped Fiber Laser Anchored on 50 GHz ITU-T Grid nm FFP S/S TDF on been FSR for mode GHz than