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Clinical course of subepithelial lesions detected on upper gastrointestinal endoscopy

World Journal of Gastroenterology 2010年第4期16卷 439-444页

作者： Yeun Jung Lim Hee Jung Son jong-soo Lee Young Hye Byun Hyun Joo Suh Pool Lyul Rhee Jae J Kim jong Chul Rhee Center for Health Promotion Department of MedicineSamsung Medical CenterSungkyunkwan University School of Medicine50Irwon-dongGangnam-guSeoul 135-710South Korea Division of Gastroenterology Department of MedicineSamsung Medical CenterSungkyunkwan University School of Medicine50Irwon-dongGangnam-guSeoul 135-710South Korea

AIM:To evaluate the natural history of subepithelial ***:We reviewed the medical records of 104 159 patients who underwent upper gastrointestinal endoscopy at the Center for Health Promotion of Samsung Medical Center between 1996 and *** lesions were detected in 795 patients(0.76%);252 patients were followed using upper gastrointestinal endoscopy for 82.5 ± 29.2 mo(range,12-160 mo;median,84 mo;1st quartile,60 mo;3rd quartile,105 mo).The median interval of follow-up endoscopy was 12 mo(range,6-105 mo;1st quartile,12 mo;3rd quartile,24 mo).RESULTS:The mean patient age was 53 years(range,22-80 years),and the male-to-female ratio was 2.36:1(177/75).The lesion size at initial measurement averaged 8.9 mm(range,2-25 mm;median,8 mm;1st quartile,5 mm;3rd quartile,10 mm).Of the 252 lesions,244(96.8%) were unchanged and 8(3.2%) were significantly increased in size(from 12.9 ± 6.0 to 21.2 ± 12.2 mm) after a mean interval of 59.1 ± 27.5 mo(range,12-86 mo).Surgical resection of lesions was performed when the lesions were ≥ 3 cm in *** lesions were diagnosed as gastrointestinal stromal tumors with an intermediate or high risk of malignancy and one lesion was classified as a ***:Most small subepithelial lesions do not change as shown by endoscopic examination,and regular follow-up with endoscopy may be considered in small,subepithelial lesions,especially lesions < 1 cm in size.

关键词： Subepithelial tumor Ultrasonography Gastrointestinal diseases Gastrointestinal endoscopy Time factors

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Evaluation of the safety of anterior capsule staining with trypan blue under air: a retrospective analysis

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International Journal of Ophthalmology(English edition) 2022年第3期15卷 432-437页

作者： Young Min Park jong soo Lee Ji Eun Lee Yeon Ji Jo Ik soo Byon Sung Who Park Centum Bright Light Eye Clinic 20Centum 2-roHaeundaeguBusanKorea 48060Republic of Korea Department of Ophthalmology School of MedicinePusan National University and Medical Research InstitutePusan 49241Republic of Korea

AIM: To evaluate the safety of using 0.03% trypan blue under air for anterior capsule staining in cataract ***: The current study involved a retrospective analysis of the medical records of 86 patients with vitreous hemorrhage, who underwent pars plana vitrectomy and cataract *** patients were classified into two *** trypan blue group(n=45) comprised patients who underwent anterior capsule staining with 0.03% trypan blue under an air *** control group(n=41) comprised of patients who underwent intracameral illuminator-assisted *** status of endothelial cell density(ECD) in both the groups was ***: The trypan blue group displayed significant decline in ECD at 1 mo(7.91% loss, P<0.001) and 3 mo(9.65% loss, P<0.001) after the surgery, whereas no significant changes were observed in the control ***, the number of patients who did not display a postoperative decline in ECD was significantly higher in the control group(43.9%;18 patients) than in the trypan blue group(17.1%;7 patients, P=0.004).CONCLUSION: Anterior capsule staining with trypan blue under the air bubble would not be as safe as the intracameral *** ECD loss might be attributed to the air bubble rather than to the deleterious effects of 0.03% trypan *** studies are required to clarify this.

关键词： anterior capsule cataract endothelium trypan blue vitreous hemorrhage

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The prognostic significance of percentage of tumour involvement according to disease risk group in men treated with radical prostatectomy

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Asian Journal of Andrology 2011年第6期13卷 828-832页

作者： jong Jin Oh Sang Cheol Lee Chang Wook Jeong Cheol Yong Yoon Seong Jin Jeong Sung Kyu hong Seok-soo Byun Yoon Kwan Rho Gheeyoung Choe Sang Eun Lee Department of Urology Seoul National University Bundang Hospital Seongnam Kyunggi-do 463-707 Korea Department of Pathology Seoul National University Bundang Hospital Seongnam Kyunggi-do 463-707 Korea

We investigated the prognostic significance of percentage of tumour involvement （PTI） according to the clinicopathological features of prostate cancer among patients who underwent radical prostatectomy （RP）. A retrospective study of 534 patients who underwent RP between September 2003 and March 2008 without any neoadjuvant or adjuvant therapy was performed. The associations of PTI with various clinicopathological features and biochemical recurrence-free survival were examined via uni- and multivariate analyses. The predictive accuracy of the multivariate model was assessed with a receiver operating characteristics-derived area under the curve. PTI was demonstrated to be significantly associated with preoperative prostate-specific antigen （PSA） level （P=0.001）, pathological Gleason score （P〈0.001）, extraprostatic tumour extension （P〈0.001）, seminal vesicle invasion （P〈0.001） and positive surgical margin （P〈0.001） in univariate analyses. When patients were stratified into disease risk groups, PTI was an independent predictor of biochemical recurrence-free survival in multivariate analysis only among the low-risk group （P=0.033） but not the intermediate- （P=0.287） or the high-risk groups （P=0.828）. The addition of the PTI did not significantly increase the accuracy of the multivariate model devised for the prediction of biochemical recurrence-free survival among both total patients （P=-0.459） and the low-risk group （P=0.268）, respectively. In conclusion, although PTI appeared to be a more significant prognostic factor among patients with low-risk disease than among those with higher risk diseases, overall, the PTI may not provide additional prognostic information beyond what can already be obtained via established prognostic factors.

关键词： biochemical recurrence-free survival percentage of tumour involvement prognosis prostate cancer prostatectomy

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The Spatial Effects of Antenna Configuration in a Large Area Inductively Coupled Plasma System for Flat Panel Displays

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Plasma Science and Technology 2014年第8期16卷 758-766页

作者： Seon-Geun OH Young-Jun LEE Jae-hong JEON jong-Hyeon SEO Hee-Hwan CHOE School of Electronics Telecommunication and Computer EngineeringKorea Aerospace University Department of Material Science and Engineering Korea Aerospace University

Spatial distributions of plasma parameters such as electron density, electron temperature and electric potential were investigated using a commercial simulation software （COMSOLTM） to predict the effects of antenna configuration in a large area inductively cou- pled plasma （ICP） system for flat panel displays. Nine planar antenna sets were evenly placed above a ceramic window. While the electron density was influenced by both the input current and gas pressure, the electron temperature and electric potential were dominantly affected by the gas pressure.

关键词： plasma ICP antenna configuration simulation

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Gas Sensing Characteristics of SnO_2 Whiskers Prepared from SNC_2O_4

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稀有金属材料与工程 2006年第A3期35卷 100-103页

作者： Ki-Won Kim Pyeong-Seok Cho jong-Heun Lee Seong-Hyeon hong Department of Materials Science & Engineering Korea UniversitySeoui 136-713Korea School of Materials Science and Engineering and Nano Systems Institute-National Core Research Center Seoul National UniversitySeoul 151-744Korea

SnO_2 whiskers were prepared from the decomposition of whisker-like SnC_2O_4,which was precipitated by a reaction between an aqueous SnCl_2 and oxalic acid solution at high solution temperatures (80℃).After the decomposition of SnC_2O_4 at 450℃,SnO_2 whiskers containing both of rutile and metastable orthorhombic phases were obtained with the content of the orthorhombic phase decreasing with increasing heat-treatment temperature and *** effect of orthorhombic phase upon CO gas sensitivity was investigated by measuring the evolution of the primary particle size and the CO sensitivity with repeating heat treatment at 450℃.The 50μg/g CO sensitivity increased with decreasing concentration of the orthorhombic phase despite particle coarsening,which suggests that the orthorhombic phase is detrimental to the CO gas sensitivity.

关键词： SnO2 whisker orthorhombic phase gas sensor SnC2O4

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Optimistic performance of carbon-free hydrazine fuel cells based on controlled electrode structure and water management

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Journal of Energy Chemistry 2020年第12期29卷 175-181页

作者： hongsun Hwang Sujik hong Do-Hyeong Kim Moon-Sung Kang Jin-soo Park Sunghyun Uhm Jaeyoung Lee Electrochemical Reaction and Technology Laboratory(ERTL) School of Earth Sciences and Environmental EngineeringGwangju Institute of Science and Technology(GIST)Cwangju 61005Republic of Korea Ertl Center for Electrochemistry and Catalysis Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea Department of Green Chemical Engineering Sangmyung UniversityCheonanChungnam 31066Republic of Korea Plant Engineering Center Institute for Advanced EngineeringYongin 17180Republic of Korea

In this study, we first attempted to discover the optimal configuration of membrane-electrode assemblies(MEAs) used to achieve a high performance of direct hydrazine fuel cells(DHFCs). We have investigated the effect of water management and the electrode thickness on the performance of DHFCs, depending on the hydrophobicity of the gas diffusion layers in the cathode and the catalyst loading in the anode with the carbon-supported Ni, synthesized by a polyol process. With the optimal water management and electrode thickness, the MEA constructed using the as-prepared Ni/C anode catalyst containing the metallic and low oxidative state and ultra-low Pt loading cathode reduced the ohmic resistance and mass transfer limitation in the current-voltage curves observed for the alkaline DHFC, achieving an impressive power performance over 500 mW cm^(–2).

关键词： Fuel cell Hydrazine Alkaline media Membrane-electrode assembly

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Recovery of cerium from glass polishing slurry

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Journal of Rare Earths 2011年第11期29卷 1075-1078页

作者： jong-Young Kim Ung-soo Kim Myeong-Seop Byeon Woo-Kyu Kang Kwang-Teak Hwang Woo-Seok Cho Icheon Branch Korea Institute of Ceramic Engineering and TechnologyGyeongchung Rd.Sindun-MyeonIcheon-siKyeonggi-do 467-843Korea RANCO Cheongju-siChungcheongbuk-doKorea

Cerium was extracted from rare earth slurry waste used for polishing a glass ***,glass frit and flocculant were removed by froth flotation and *** recovered rare earth slurry exhibited almost the same particle size distribution as original slurry,which could be reused as slurry for glass *** the rare earth slurry,the cerium solution was obtained by an oxidative thermal treatment and subsequent chemical *** cerium solution was further purified up to 94% by selective precipitation of rare earth species.

关键词： cerium separation waste polishing slurry rare earths

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Room-temperature lasing from nanophotonic topological cavities

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Light(Science & Applications) 2020年第1期9卷 823-830页

作者： Daria Smirnova Aditya Tripathi Sergey Kruk Min-soo Hwang Ha-Reem Kim hong-Gyu Park Yuri Kivshar Nonlinear Physics Center Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Institute of Applied Physics Russian Academy of ScienceNizhny Novgorod 603950Russia Department of Physics Indian Institute of TechnologyDelhi 110016India Department of Physics Korea UniversitySeoul 02841Republic of Korea

The study of topological phases of light underpins a promising paradigm for engineering disorder-immune compact photonic devices with unusual *** with an optical gain,topological photonic structures provide a novel platform for micro-and nanoscale lasers,which could benefit from nontrivial band topology and spatially localized gap ***,we propose and demonstrate experimentally active nanophotonic topological cavities incorporating Ⅲ-Ⅴ semiconductor quantum wells as a gain medium in the *** observe room-temperature lasing with a narrow spectrum,high coherence,and threshold *** emitted beam hosts a singularity encoded by a triade cavity mode that resides in the bandgap of two interfaced valley-Hall periodic photonic lattices with opposite parity *** findings make a step towards topologically controlled ultrasmall light sources with nontrivial radiation characteristics.

关键词： lasing singularity narrow

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Development of indirect competitive fluorescence immunoassay for 2,2′,4,4′-tetrabromodiphenyl ether using DNA/dye conjugate as antibody multiple labels

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Journal of Environmental Sciences 2012年第7期24卷 1334-1340页

作者： Zi-Yan Fan Young soo Keum Qing-Xiao Li Weilin L.Shelver Liang-hong Guo State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-environment SciencesChinese Academy of SciencesBeijing 100085China College of Life and Environmental Sciences Konkuk University in Korea1 Hwayang-dongGwangjin-guSeoul 143-701Korea Department of Molecular Bioscience and Bioengineering University of Hawaii at Manoa1955 East-West RoadHonoluluHI 96822USA USDA-ARS Bioscience Research Laboratory 1605 Albrechht BoulevardFargoND 58105USA

An indirect competitive fluorescence immunoassay using a DNA/dye conjugate as antibody multiple labels was developed on 96-well plates for the identification and quantification of 2,2＇,4,4＇-tetrabromodiphenyl ether （BDE-47） in aqueous samples. A hapten, 2,4,2＇- tribromodiphenyl ether-4＇-aldehyde, was synthesized, and was conjugated to bovine serum albumin to form a coating antigen. Specific recognition of the antigen by anti-PBDE antiserum was confirmed by a surface plasmon resonance measurement. In the immunoassay, the coating antigen was adsorbed on a 96-well plate first, and a sample, antiserum and biotinylated goat anti-rabbit secondary antibody were then added and reacted sequentially. A biotinylated, double-stranded DNA with 219 base pairs was attached to the secondary antibody by using streptavidin as a molecular bridge. In situ multiple labeling of the antibody was accomplished after addition of a DNA-binding fluorescent dye, SYBR Green I. The working range of the immunoassay for the BDE-47 standard was 3.1-390 ~tg/L, with an IC50 value of 15.6 Ixg/L. The calculated LOD of the immunoassay is 0.73 Ixg/L. The immunoassay demonstrated relatively high selectivity for BDE-47, showing very low cross-reactivity （〈 3%） with BDE-15, BDE-153 and BDE-209. With a spiked river water sample containing 50 Izg/L BDE-47, quantification by the immunoassay was 41.9 ~tg/L, which compared well with the standard GC-ECD method （45.7 Ixg/L）. The developed immunoassay provides a rapid screening tool for polybrominated diphenyl ethers in environmental samples.

关键词： polybrominated diphenyl ethers fluorescence immunoassay microplate multiple labeling

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Application of automated cone penetrometer for railway investigation using correlations with DCPI and deflection modulus

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Research in Cold and Arid Regions 2022年第4期14卷 235-238页

作者： Sang Yeob Kim Won-Taek hong jong-Sub Lee School of Civil Environmental and Architectural EngineeringKorea UniversitySeoul 02841Republic of Korea Department of Civil&Environmental Engineering Gachon UniversitySeongnam-si 13120Republic of Korea

Portable in-situ devices have been used for characterizing low accessible field,such as the railway *** this study,the automated cone penetrometer(ACP)was designed for the application on the railway *** is composed of the cone tip,driving rod,and hydraulic hammer *** hydraulic motor lifts and drops the 294.3 N hammer from a height of 200 mm such that the potential energy of 58.9 N m impacts the driving *** N-value(NACP)from the ACP test was compared with the dynamic cone penetration index(DCPI)from the dynamic cone penetrometer(DCP)*** test results show that the NACP and DCPI profiles show opposite trend owing to the inverse concept of the *** the correlation of DCPI and NACP,the limitation of DCPI reveals owing the minimum manually measured value of 1 mm/***,the evaluation of the deflection modulus(EFWD)using NACP is more efficient than that using *** on the result of this study,we suggest that ACP can be used for strength and stiffness evaluation of railway subgrade rapidly and reliably.

关键词： Automated cone penetrometer DCPI E_(FWD )N_(ACP) Railway subgrade

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