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Correlation of Microstructure and Hydrogen Delayed Fracture for 1GPa Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 252-254页

作者： Hee Jae kang Ji Tae Park Soon Tae Ahn Kyung Mox Cho nam hyun kang Department of Materials Science and Engineering Pusan National UniversityBusan 609-735Korea Samhwa Steel 339-4 Samrak-dongSasang-guBusan 617-825Korea

Automobile industry tries to reduce the weight of automobile using high-strength ***,the high-strength steels are highly susceptible to delayed-fracture caused by hydrogen *** increasing the strength,hydrogen embrittlement is more sensitive to diffusible *** mechanism of delayed-fracture and the relationship with the microstructure and alloying elements are still *** study analyzed the effect of the size and the spheroidization rate for the carbides on hydrogen-induced delayed fracture for 1GPa TS steel.

关键词： hydrogen delayed fracture microstructure spheroidization

Stress-Strain Partitioning Analysis in Dual Phase Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 310-311页

作者： Eun-Joon Chun nam-hyun kang Yong-Ho Park Man-Been Moon Department of Materials Science and Engineering Pusan National UniversityBusan 609-735South Korea hyundai HYSCO R&D center 313Donggok-riSongsan-myeonDangjin-gunChungnam 343-831South Korea

Dual-Phase (DP) steels are made of ductile ferrite phase and hard martensite *** it became crucial in progress of automotive industry to save fuel consumption and reduce total weight of vehicles,we need more accurate estimation of distribution to mechanical properties in total amounts of *** steels have considerable difference of mechanical levels in each phase including ferrite and *** is why this study focuses on deconvolution of experimental tensile curve into ferrite and martensite using EBSD for calculation of phase volume fractions and Swift *** for certain parameter of each phase was conducted to produce the deconvolution curves.

关键词： dual phase steel Swift equation EBSD stress-strain partitioning

Effect of Isothermal Annealing on Nano Ti-Carbides Precipitation

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Journal of Iron and Steel Research International 2011年第S1期18卷 287-289页

作者： Cheol-ho Park Woo-jin Kim nam-hyun kang hyung-hyup Do Kyung-Mox Cho Department of Materials Science and Engineering Pusan National UniversityBusan 609-735Korea Technical Research Laboratories Hyundai steelsDangjinChungnam 343-711Korea

Transmission electron microscopy was used to investigate the effect of isothermal holding temperature and time on the nano Ti-precipitates.A holding temperature was varied systematically from 400℃ to 1200℃.The isothermal holding was continued for 30s,300s and 900s,*** carbides of (Ti,Nb)C were precipitated significantly at 900℃.The size of carbides was approximately 10nm at 30s holding and increased to 20～30nm at 900s *** holding at 1000℃ showed the increased amount of carbides larger than *** 800℃,nano (Ti,Nb)C was not observed at 30s and it was examined at *** size of nano (Ti,Nb)C was smaller than that of 900℃.As the isothermal temperature decreased to 700 ℃,the nano (Ti,Nb)C was only seen at 900s holding and the size of carbides was smaller than *** (Ti,Nb)C was disappeared at isothermal holding below 600℃.The kinetics of nano (Ti,Nb)C precipitation were studied as a function of isothermal holding temperature and time,respectively,using the precipitate growth equations.

关键词： Ti carbide hot rolled steel hole expansion ratio isothermal holding nano precipitates

Realizing High Thermoelectric Performance in n-Type Se-Free Bi2Te3 Materials by Spontaneous Incorporation of FeTe2 Nanoinclusions

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Energy & Environmental Materials 2024年第4期7卷 344-354页

作者： Jamil Ur Rahman Woo hyun nam Yong-Jae Jung Jong Ho Won Jong-Min Oh Nguyen Van Du Gul Rahman Víctor M.García-Suárez Ran He Kornelius Nielsch Jung Young Cho Won-Seon Seo Jong Wook Roh Sang-il Kim Soonil Lee Kyu Hyoung Lee hyun Sik Kim Weon Ho Shin Leibniz Institute for Solid State and Materials Research Advanced Materials Convergence R&D Division Korea Institute of Ceramic Engineering & Technology Department of Electronic Materials Engineering Kwangwoon University Department of Energy Engineering Dankook University Faculty of Fundamental Science Phenikaa University Department of Physics Quaid-i-Azam University Departamento de Física Universidad de Oviedo Nanomaterials and Nanotechnology Research Center-CINN Department of Materials Science and Engineering Yonsei University School of Nano & Materials Science and Engineering Kyungpook National University Department of Materials Science and Engineering University of Seoul School of Materials Science and Engineering Changwon National University

Bi2Te3-based materials have drawn much attention from the thermoelectric community due to their excellent thermoelectric performance near room ***,the stability of existing n-type Bi2（Te,Se）3materials is still low due to the evaporation energy of Se (37.70 kJ mol-1) being much lower than that of Te (52.55 kJ mol-1).The evaporated Se from the material causes problems in interconnects of the module while degrading the efficiency.

关键词： Bi2Te3 energy harvesting FeTe2 nanoinclusion n-type materials thermoelectric

Survival benefit of concurrent chemoradiotherapy for advanced ampulla of Vater cancer

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World Journal of Clinical Cases 2024年第2期12卷 267-275页

作者： Chae Hwa Kwon hyung Il Seo Dong Uk Kim Sung Yong Han Suk Kim nam Kyung Lee Seung Baek Hong Ji hyun Ahn Young Mok Park Byeong Gwan Noh BioMedical Research Institute Pusan National University HospitalBusan 49241South Korea Department of Surgery Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Internal Medicine Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Radiology Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Pathology and Biomedical Research Institute Pusan National University HospitalBusan 49241South Korea

BACKGROUND Currently,there is no standard adjuvant therapy for patients with resected ampulla of Vater(AoV)*** To evaluate the effectiveness of adjuvant concurrent chemoradiotherapy(CCRT)in patients with advanced AoV cancer who underwent curative *** This single-centered,retrospective study included 29 patients with advanced AoV cancer who underwent pancreaticoduodenectomy between 2006 and *** impact of CCRT on advanced AoV cancer was *** The 1-,3-,and 5-yr recurrence-free survival(RFS)rates for patients with advanced AoV cancer were 82.8%,48.3%,and 40.8%,respectively,and the overall survival(OS)rates were 89.7%,62.1%,and 51.7%,***-cular invasion was found to be a significant risk factor for RFS and OS in patients with advanced AoV cancer in the univariate analysis,whereas T stage and lymph node metastasis were significantly associated with OS in the multivariate *** to the patients who did not receive adjuvant CCRT,those who received adjuvant CCRT did not show statistically significant improvements in the RFS and OS,although they had a significantly lower average age and significantly higher platelet-to-lymphocyte *** Adjuvant CCRT did not improve survival outcomes in patients with advanced AoV *** findings contribute to existing knowledge on the effectiveness of CCRT in this patient population and provide important insights for clinical decision-making.

关键词： Advanced ampulla of Vater cancer Adjuvant concurrent chemoradiotherapy Recurrence Survival Vater cancer

Catalpa bignonioides extract improves exercise performance through regulation of growth and metabolism in skeletal muscles

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Asian Pacific Journal of Tropical Biomedicine 2024年第2期14卷 47-54页

作者： Hoibin Jeong Dong-joo Lee Sung-Pil Kwon SeonJu Park Song-Rae Kim Seung hyun Kim Jae-Il Park Deug-chan Lee Kyung-Min Choi WonWoo Lee Ji-Won Park Bohyun Yun Su-Hyeon Cho Kil-nam Kim Seoul Center Korea Basic Science InstituteSeoul 02841Republic of Korea Chuncheon Center Korea Basic Science InstituteChuncheon 24341Republic of Korea Research&Development Center Chungdam CDC JNPharm LLC.Chuncheon 24341Republic of Korea Department of Biomedical Technology Kangwon National UniversityChuncheon 24341Republic of Korea Yonsei Institute of Pharmaceutical Sciences College of PharmacyYonsei UniversityIncheon 21983Republic of Korea Gwangju Center Korea Basic Science InstituteGwangju 61751Republic of Korea Honam National Institute of Biological Resources 99Gohadoan-gilMokpo-siJeollanam-do58762Republic of Korea Department of Bio-analysis Science University of Science&TechnologyDaejeon34113Republic of Korea

Objective:To evaluate the effects of Catalpa bignonioides fruit extract on the promotion of muscle growth and muscular capacity in vitro and in ***:Cell viability was measured using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide *** proliferation was assessed using a 5-bromo-2’-deoxyuridine(BrdU)assay *** blot analysis was performed to determine the protein expressions of related *** effects of Catalpa bignonioides extract were investigated in mice using the treadmill exhaustion test and whole-limb grip strength *** composition analysis was performed using high-performance liquid chromatography(HPLC).Results:Catalpa bignonioides extract increased the proliferation of C2C12 mouse myoblasts by activating the Akt/mTOR signaling *** also induced metabolic changes,increasing the number of mitochondria and glucose metabolism by phosphorylating adenosine monophosphate-activated protein *** an in vivo study,the extract-treated mice showed improved motor abilities,such as muscular endurance and grip ***,HPLC analysis showed that vanillic acid may be the main component of the Catalpa bignonioides extract that enhanced muscle ***:Catalpa bignonioides improves exercise performance through regulation of growth and metabolism in skeletal muscles,suggesting its potential as an effective natural agent for improving muscular strength.

关键词： Catalpa bignonioides Skeletal muscle Cell proliferation Mitochondria Energy metabolism C2C12

Wire-Shaped 3D-Hybrid Supercapacitors as Substitutes for Batteries

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Nano-Micro Letters 2020年第2期12卷 211-223页

作者： Kyeong‑nam kang Ananthakumar Ramadoss Jin‑Wook Min Jong‑Chul Yoon Deokjung Lee Seok Ju kang Ji‑hyun Jang School of Energy and Chemical Engineering Low Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Laboratory for Advanced Research in Polymeric Materials Central Institute of Plastic Engineering and TechnologyBhubaneswar 751024India School of Mechanical Aerospace and Nuclear EngineeringUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea

We report a wire-shaped three-dimensional(3D)-hybrid supercapacitor with high volumetric capacitance and high energy density due to an interconnected 3D-configuration of the electrode allowing for large number of electrochemical active sites,easy access of electrolyte ions,and facile charge transport for flexible wearable *** interconnected and compact electrode delivers a high volumetric capacitance(gravimetric capacitance)of 73 F cm−3(2446 F g−1),excellent rate capability,and cycle *** 3D-nickel cobalt-layered double hydroxide onto 3D-nickel wire(NiCo LDH/3D-Ni)//the 3D-manganese oxide onto 3D-nickel wire(Mn3O4/3D-Ni)hybrid supercapacitor exhibits energy density of 153.3 Wh kg−1 and power density of 8810 W kg−*** red lightemitting diode powered by the as-prepared hybrid supercapacitor can operate for 80 min after being charged for tens of seconds and exhibit excellent electrochemical stability under various deformation *** results verify that such wire-shaped 3D-hybrid supercapacitors are promising alternatives for batteries with long charge–discharge times,for smart wearable and implantable devices.

关键词： Three-dimensional(3D)metal current collector Flexible hybrid supercapacitor Wire-shaped supercapacitor High energy density device Fast charging energy storage system

Mass-forming ischemic colitis that mimics colon cancer

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Chinese Medical Journal 2020年第10期133卷 1253-1254页

作者： Ho Seung Kim Fozan Sauri Jae hyun kang nam Kyu Kim Division of Colorectal Surgery Department of SurgerySeverance HospitalYonsei University College of MedicineSeoul 03722Korea.

To the Editor:Rarely,ischemic colitis can also mimic a carcinoma during colonoscopy and on computed tomography(CT)*** colonoscopy,an ulceration,a submucosal mass,and a narrowed colon segment with an ulcerated mucosa have all been described as mimicking this kind of *** reports have documented this type of mass-forming ischemic colitis variant.[1-4]Here,we described two patients with ischemic colitis who presented with lesions mimicking colon cancer.

关键词： colon cancer. colitis

Reciprocal inhibition of expression between RAV1 and BES1 modulates plant growth and development in Arabidopsis

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Journal of Integrative Plant Biology 2023年第5期65卷 1226-1240页

作者： Dami Yang hyun-young Shin hyun Kyung kang Yun Shang So Young Park Dong-Hoon Jeong Kyoung Hee nam Department of Biological Sciences Sookmyung Women's UniversitySeoul 04310Republic of Korea Research Institute for Women's HealthSookmyung Women's UniversitySeoul 04310Republic of Korea Department of Life Science and Multidisciplinary Genome Institute Hallym UniversityChuncheon 24252Republic of Korea Present Address:Peking University Institute of Advanced Agricultural ScienceWeifang 261325China

RAV1(Related to ABI3/VP1)is a plant-specific B3 and AP2 domain-containing transcription factor that acts as a negative regulator of growth in many plant *** expression of RAV1 is downregulated by brassinosteroids(BRs);large-scale transcriptome analyses have shown that the expression of RAV1 was previously targeted by BRI1-EMS-SUPPRESOR1(BES1)and BRASSINAZOLE-RESISTANT1(BZR1),which are critical transcription factors for the BR-signaling *** RAV1-overexpressing transgenic plants,we showed that RAV1 overexpression reduced the BR signaling capacity,resulting in the downregulation of BR biosynthetic genes and BES1 ***,we demonstrated that BES1,not BZR1,is directly bound to the RAV1 promoter and repressed RAV1 expression,and vice versa;RAV1 is also bound to the BES1 promoter and repressed BES1 *** mutual inhibition was specific to RAV1 and BES1 because RAV1 exhibited binding activity to the BZR1 promoter but did not repress BZR1 *** observed that constitutively activated BR signaling phenotypes in bes1-D were attenuated by the repression of endogenous BES1 expression in transgenic bes1-D plants overexpressing ***-sequencing analysis of RAV1-overexpressing transgenic plants and bes1-D mutant plants revealed differentially expressed genes by RAV1 and BES1 and genes that were oppositely co-regulated by RAV1 and ***1 and BES1 regulated different transcriptomes but co-regulated a specific set of genes responsible for the balance between growth and *** results suggested that the mutual inhibitory transcriptional activities of RAV1 and BES1 provide fine regulatory mechanisms for plant growth and development.

关键词： BES1 growth modulation RAV1 transcriptional regulation