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Restoration of common bile duct diameter within 2 weeks after endoscopic stone retraction is a preventive factor for stone recurrence

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Hepatobiliary & Pancreatic Diseases International 2018年第3期17卷 251-256页

作者： Jin Jeon Sung Uk Lim Chang-Hwan park Chung-Hwan jun Seon-Young park Jong-Sun Rew Department of Internal Medicine Chonnam National University Hospital Department of Internal Medicine Mokpo Hankook Hospital

Background： Little information is available about the relationship between restoration of common bileduct （CBD） diameter after endoscopic stone retraction and recurrence of CBD stones in elderly *** present study was to determine whether restoration of CBD diameter is a preventive factor for CBDstone recurrence in elderly patients who underwent endoscopic retrograde cholangiopancreatography（ERCP）.

关键词： Restoration Common bile duct Endoscopic retrograde cholangiopancreatography Common bile duct stone

Atomically thin heterostructure with gap-mode plasmon for overcoming trade-off between photoresponsivity and response time

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Nano Research 2021年第5期14卷 1305-1310页

作者： Khang june Lee Cheolmin park Hyeok jun Jin Gwang Hyuk Shin Sung-Yool Choi School of Electrical Engineering Center for Advanced Materials Discovery towards 3D DisplaysKorea Advanced Institute of Science and Technology291 Daehak-roYuseong-guDaejeon34141Republic of Korea

Two-dimensional(2D)materials have recently provided a new perspective on optoelectronics because of their unique layered structure and excellent physical ***,their potential use as optoelectric devices has been limited by the trade-off between photoresponsivity and response ***,based on a vertically stacked atomically thin p-n junction,we propose a gap-mode plasmon structure that simultaneously enables enhanced responsivity and rapid *** atomically thin 2D materials act as a spacer for enhancing the gap-mode plasmons,and their short transit length in the vertical direction allows fast photocarrier *** demonstrate a high responsivity of up to 8.67 A/W with a high operation speed that exceeds 35 MHz under a 30 nW laser *** photocurrent,absorption,and a numerical simulation are used to verify the effectiveness of the gap-mode plasmons in the *** believe that the design strategy proposed in this study can pave the way for a platform to overcome the trade-off between responsivity and response time.

关键词： atomically thin heterostructure gap-mode plasmons photodetectors high responsivity fast response time

用于电化学能量转换反应的非贵金属单原子催化剂

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Chinese Journal of Catalysis 2023年第7期50卷 195-214页

作者： sang Eon jun Sungkyun Choi Jaehyun Kim Ki Chang Kwon Sun Hwa park Ho Won Jang 首尔国立大学先进材料研究所材料科学与工程系首尔韩国韩国标准与科学研究院跨学科材料测量研究所大田韩国首尔国立大学融合技术高级研究所水原韩国

非贵金属单原子催化剂(NNMSAC)被认为是贵金属单原子催化剂的经济替代品,同时保留了源自单原子位点独特电子结构的高催化活性.通过金属-载体充分的相互作用,NNMSAC可以在各种电催化反应中发挥关键作用,具有与贵金属单原子催化剂相当的... 详细信息

非贵金属单原子催化剂(NNMSAC)被认为是贵金属单原子催化剂的经济替代品,同时保留了源自单原子位点独特电子结构的高催化活性.通过金属-载体充分的相互作用,NNMSAC可以在各种电催化反应中发挥关键作用,具有与贵金属单原子催化剂相当的高原子利用效率和选择性.为此,本文首先综述了NNMSAC在调节反应选择性、金属-载体相互作用和催化活性中心方面的特点.随后,详细介绍了用于析氢反应、析氧反应、氧还原反应、二氧化碳还原反应和氮还原反应的代表性NNMSAC(Co,Ni,Fe,Cu和双金属SAC)催化剂.最后,展望了NNMSAC在几何、电子和电化学性能方面进一步发展所面临的挑战.

关键词：单原子催化剂非贵金属电催化水裂解 CO_(2)还原

Amorphous BaTiO_(3) Electron Transport Layer for Thermal Equilibrium-Governed γ-CsPbl_(3) Perovskite Solar Cell with High Power Conversion Efficiency of 19.96%

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Energy & Environmental Materials 2024年第3期7卷 291-302页

作者： Changhyun Lee Chanyong Lee Kyungjin Chae Taemin Kim Seaeun park Yohan Ko Yongseok jun Department of Energy Environment Policy and Technology Graduate School of Energy and Environment(KU-KIST Green School)Korea UniversitySeoul 02841Republic of Korea Nano Electronic Materials and Components Research Center Gumi Electronics and Information Technology Research Institute(GERI)Gumi 39171Republic of Korea Energy Materials Research Center Clean Energy Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea

Compared to organic-inorganic hybrid perovskites,the cesium-based allinorganic lead halide perovskite(CsPbI_(3))is a promising light absorber for perovskite solar cells owing to its higher resistance to thermal ***,additional research is required to reduce the nonradiative recombination to realize the full potential of CsPbI_(3).Here,the diffusion of Cs ions participating in ion exchange is proposed to be an important factor responsible for the bulk defects inγ-CsPbI_(3)*** based on first-principles density functional theory reveal that the[PbI_(6)]^(4-)octahedral tilt modifies the perovskite crystallographic properties inγ-CsPbI_(3),leading to alterations in its bandgap and crystal *** addition,by substituting amorphous barium titanium oxide(a-BaTiO_(3))for TiO_(2)as the electron transport layer,interfacial defects caused by imperfect energy levels between the electron transport layer and perovskite are ***-resolution transmission electron microscopy and electron energy loss spectroscopy demonstrate that a-BaTiO_(3)forms entirely as a single phase,as opposed to Ba-doped TiO_(2)hybrid nanoclusters or separate domains of TiO_(2)and BaTiO_(3)***,inorganic perovskite solar cells based on the a-BaTiO_(3)electron transport layer achieved a power conversion efficiency of 19.96%.

关键词： amorphous BaTiO_(3) electron transport layer moisture γ-CsPbI_(3)

Management of entecavir-resistant chronic hepatitis B with adefovir-based combination therapies

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World Journal of Gastroenterology 2015年第38期21卷 10874-10882页

作者： Hyoung Su Kim Hyung Joon Yim Myoung Kuk Jang Ji Won park sang jun Suh Yeon Seok Seo Ji Hoon Kim Bo Hyun Kim sang Jong park Sae Hwan Lee sang Gyune Kim Young Seok Kim jung Il Lee Jin-Woo Lee In Hee Kim Tae Yeob Kim Jin-Wook Kim Sook-Hyang Jeong Young Kul jung Hana park Seong Gyu Hwang Department of Internal Medicine Hallym University College of Medicine Department of Internal Medicine Korea University Ansan Hospital Department of Internal Medicine Korea University Medical College Department of Internal Medicine Bundang Jesaeng Hospital Department of Internal Medicine Soon Chun Hyang University College of Medicine Department of Internal Medicine Inha University School of Medicine Department of Internal Medicine Chonbuk National University Medical School Department of Internal Medicine Hanyang University College of Medicine Department of Internal Medicine Seoul National University College of Medicine Department of Internal Medicine Gachon University School of Medicine Department of Internal Medicine CHA Bundang Medical CenterCHA University

AIM: To evaluate the long-term efficacy adefovir(ADV)-based combination therapies in entecavir(ETV)-resistant chronic hepatitis B(CHB) patients. METHODS: F i fty CHB pat ient s wi t h genotypic resistance to ETV at 13 medical centers in South Korea were included for the analysis. All the patients received rescue therapy with the combination of ADV plus ETV(ADV/ETV,n = 23) or ADV plus lamivudine(LMV)(ADV/LMV,n = 27) for more than 12 mo. Patients were monitored at least every 3-4 mo during ADV-based combination therapy by clinical examination as well as biochemical and virological assessments. Hepatitis B virus(HBV) DNA levels were measured by realtime PCR and logarithmically transformed for analysis. Cumulative rates of virologic response(VR; HBV DNA < 20 IU/m L) were calculated using the Kaplan-Meier method,and the difference was determined by a logrank test. Multivariate logistic regression and Cox proportional hazards models were used to identify independent risk factors significantly associated with short-term and long-term VR,***: Baseline median HBV DNA levels were 5.53(2.81-7.63) log10 IU/m L. The most commonly observed ETV genotypic mutation sites were rt184 and rt202. Patients were treated for a median of 27(12-45) mo. Overall,cumulative VR rates at 6,12,24,and 36 mo were 26%,36%,45%,and 68%,respectively. Patients treated with the ADV/ETV combination showed higher cumulative VR rates(35%,43%,65%,and 76%,respectively) than those with the ADV/LAM combination(18%,30%,30%,and 62%,respectively; P = 0.048). In the multivariate analysis,low baseline HBV DNA levels(< 5.2 log10 IU/m L) and initial virologic response at 3 mo(IVR-3; HBV DNA < 3.3 log10 IU/m L after 3 mo) were independent predictive factors for VR. Patients with favorable predictors achieved cumulative VR rates up to 90% at 36 mo. During the same period,the cumulative incidence of virologic breakthrough was as low as 6% in patients with the both favorable ***: If tenof

关键词： Adefovir Chronic hepatitis B Entecavir Lamivudine

Forward-viewing endoscopic ultrasound-guided NOTES interventions: A study on peritoneoscopic potential

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World Journal of Gastroenterology 2013年第41期19卷 7160-7167页

作者： Seung Uk Jeong Hassanuddin Aizan Tae jun Song Dong Wan Seo Su-Hui Kim Do Hyun park sang Soo Lee Sung Koo Lee Myung-Hwan Kim Department of Gastroenterology Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 138-736South Korea Department of Internal Medicine Ilsan Paik HospitalInje UniversityKoyang 411-706South Korea Asan Institute for Life Sciences Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 138-736South Korea

AIM:To evaluate the feasibility of diagnostic and therapeutic transgastric(TG)peritoneoscopic interventions with a forward-viewing endoscopic ultrasound(FV-EUS).METHODS:This prospective endoscopic experimental study used an animal *** TG peritoneoscopic interventions and EUS examination of the intraabdominal organs were performed using an FV-EUS on 10 animal models(1 porcine and 9 canine).The procedures carried out include EUS evaluation and endoscopic biopsy of intraperitoneal organs,EUS-guided fine needle aspiration(EUS-FNA),EUS-guided radiofrequency ablation(EUS-RFA),and argon plasma coagulation(APC)for hemostatic *** animals were kept alive for 7 d,and then necropsy was performed to evaluate results and ***:In all 10 animals,TG peritoneoscopy,followed by endoscopic biopsy for the liver,spleen,abdominal wall,and omentum,was performed *** helped control minor *** of intra-abdominal solid organs with real-time EUS was accomplished with *** EUS-FNA was successfully performed on the liver,spleen,and ***,a successful outcome was achieved with EUSRFA of the hepatic *** adverse events were recorded during the ***:Peritoneoscopic natural orifice transluminal endoscopic surgery(NOTES)interventions through FV-EUS were feasible in providing evaluation and performing endoscopic *** promises potential as a platform for future EUS-based NOTES.

关键词： Forward-viewing endoscopic ultrasound Oblique-viewing endoscopic ultrasound Endoscopic ultrasound guided intervention Peritoneoscopy Natural orifice transluminal endoscopic surgery

Roles of humidity and heat treatment temperatures on YBa_2Cu_3O_(7-x) coated conductors by trifluoroacetic acid-metal organic deposition process

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中国有色金属学会会刊：英文版 2009年第4期19卷 956-960页

作者： Seok-Hern JANG jun-Hyung LIM Chang-Min LEE Eui-Cheol park Soo-Min HWANG jun-Hyuk CHOI Jong-Hyun SHIM Jin-Hyun park Won KIM Jinho JOO School of Advanced Materials Science and Engineering Sungkyunkwan University

YBa2Cu3O7-x(YBCO) films were fabricated on an LAO substrate using the trifluoroacetic acid-metal organic deposition(TFA-MOD) method and the effects of the humidity and heat treatment temperatures on the microstructure,degree of texture and critical properties of the films were *** order to understand the combined effects of the humidity and the calcining and firing temperatures on critical properties,heat-treatment was performed at various temperatures with the other processing variables *** films were calcined at 400-430 ℃ and fired at 750-800 ℃ in a 0-12.1% humidified Ar-O2 *** texture was determined by pole-figure *** amount of the BaF2 phase was effectively reduced and a sharp and strong biaxial texture was formed under a humidified atmosphere,which led to increased critical *** addition,the microstructure varied significantly with firing temperature but changed little with calcining *** highest IC of 40 A/cm-width,which corresponds to JC value of 1.8 MA/cm2,was obtained for the films fired at 775 ℃(in 12.1% humidity) after calcining at 400-430 ℃.It is likely that the highest IC value is due to the formation of a more pure YBCO phase,c-axis grains,and a denser microstructure.

关键词： YBa2Cu3O7 热处理温度三氟乙酸沉积过程湿度涂层导体有机金属微观结构变化

Moisture sorption, thermal, and caking characteristics of L-lysine-carbonate granules

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FOOD BIOSCIENCE 2023年第3期53卷 2983-2990页

作者： An, Suyeon Ahn, Sungahm Letona, Andres Shin, Ji Hyun Kang, Seung Hoon Jeong, Jae Yun park, sang Min Kim, jun Woo Yu, Daeung Chung, Hee Chung, Donghwa Seoul Natl Univ Grad Sch Int Agr Technol Food Technol Major Pyeongchang 25354 South Korea CJ CheilJedang CJ BIO Res Inst Suwon 16495 South Korea Seoul Natl Univ Inst Food Industrializat Inst Green Bio Sci & Technol Pyeongchang 25354 South Korea Changwon Natl Univ Dept Food & Nutr Chang Won 51140 South Korea Seoul Natl Univ Ctr Food & Bioconvergence Seoul 08826 South Korea

L-Lysine, an essential amino acid, is often produced in the granular form of L-lysine-monohydrochloride (L-lysineHCl). To address chemical waste and processing cost concerns associated with the production of L-lysine-HCl granules, an alternative process has been recently developed for the production of L-lysine as granules of L-lysinecarbonate (L-lysine-CO3). In the present study, the moisture sorption, thermal, and caking properties of L-lysineCO3 granules were investigated in comparison with commercial L-lysine-HCl granules. L-Lysine-CO3 granules showed a popcorn-like surface structure (59.0% crystallinity), while L-lysine-HCl granules exhibited an angular crystalline structure (72.9% crystallinity). L-Lysine-CO3 granules had a less compact structure than L-lysine-HCl granules and showed excellent initial flowability comparable to L-lysine-HCl granules. L-Lysine-CO3 granules were more hygroscopic than L-lysine-HCl granules, probably due to their lower crystallinity and less compact structure. L-Lysine-CO3 granules began to undergo thermal decomposition at 192 degrees C, probably due to CO2 release, followed by melting at 234 degrees C and further decomposition, while L-lysine-HCl granules underwent melting at 251 degrees C, and then began to undergo thermal decomposition at 260 degrees C. No glass transition was observed for either lysine-CO3 or L-lysine-HCl granules. Storage test under pressurized and accelerated conditions showed that L-lysine-CO3 granules were more prone to caking and formed harder agglomerates than L-lysine-HCl granules. The results showed that L-lysine-CO3 granules were more hygroscopic, less thermally stable, and more prone to caking, compared to commercial L-lysine-HCl granules. However, these properties of L-lysine-CO3 granules were at acceptable levels for commercial use, thus L-lysine-CO3 granules have high potential for commercial development.

关键词： L-Lysine-carbonate granules Moisture sorption Thermal transition Thermal stability Caking

Mapping bathymetry based on waterlines observed from low altitude Helikite remote sensing platform

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Acta Oceanologica Sinica 2015年第9期34卷 110-116页

作者： JO Young-Heon SHA Jin KWON Jae-Il jun Kicheon park Jinku Department of Oceanography Pusan National University College of Earth Oceanand EnvironmentUniversity of Delaware Coastal Disaster Research Center Korea Institute of Ocean Science & Technology China-Korea Joint Ocean Research Center

Mapping shoreline changes along coastal regions is critically important in monitoring continuously rising sea surface heights due to climate change and frequent severe storms. Thus, it is especially important if the region has very high tidal ranges over very gentle tidal flats, which is a very vulnerable region. Although the various remote sensing platforms can be used to map shoreline changes, the spatial and temporal resolutions are not enough to obtain it for a short time. Accordingly, in this study we introduce the newly developed low altitude Helikite remote sensing platform to achieve much better resolutions of shorelines and a bathymetry. The Helikite stands for Helium balloon and Kite, which is a kind of aerial platform that uses the advantages of both a Helium balloon and a kite. Field experiments were conducted in the Jaebu Island, off the coast of the west Korean Peninsula in January 29, 2011. In order to extract shorelines from the consecutive images taken by the low altitude Helikite remote sensing platform, active contours without edges （ACWE） is used. Edges or boundaries exist primarily on places between one type of objective and the other. Since the hydrodynamic pressure has an effect everywhere, the locations of the waterlines can be the isobath lines. We could map several waterlines, which would enable us to complete a local bathymetry map ranges from 35 to 60 cm depth. The error resulting from applying ACWE algorithm to the imagery to determine the waterline is approximately less than 1 m. Therefore, it is very unique way to obtain such high resolutions of bathymetry with high accuracy for the regions of extremely high tidal ranges for a short time.

关键词： Helikite mapping shoreline active contours without edges (ACWE) remote sensing