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Journal of Materials Science & Technology 2023年第6期137卷 152-158页

作者： kitae eom Jung-Woo Lee Gyeongmo Yang Youngmin kim Jaeyoung Jeon Jieun Yeon Hyungwoo Lee School of Advanced Materials Science and Engineering Sungkyunkwan University(SKKU)Suwon 16419South Korea kiURI Institute Yonsei UniversitySeoul 03722South Korea Department of Physics Ajou UniversitySuwon 16499South Korea Department of Energy Systems Research Ajou UniversitySuwon 16499South Korea

LaAlO_(3)/SrTiO_(3)(LAO/STO)heterostructures have shown a strong persistent photoconductivity(PPC)at room *** abnormally strong PPC has attracted immense research interest due to its possible applications in optically-tunable electronic *** its promise,the fundamental understanding of the PPC in the LAO/STO heterostructures is still ***,we report that the giant PPC origi-nates from the photo-induced valence change in oxygen vacancies near the LAO/STO *** spec-tral analysis of the photocurrent and the model-fitting study consistently show that the ionized oxygen vacancies near the interface are neutralized during the electron relaxation *** hinder the complete relaxation of the photoexcited electrons by the deeply-located oxygen vacancies and result in the strong *** change in the ionization state distribution of the oxygen vacancies is probed by the per-sistent noise behavior at the frequency between 1 kHz and 20 kHz *** results provide insight into the role of oxygen vacancies in influencing the internal charge distribution and triggering the PPC phenomena in complex oxide heterostructures.

关键词： Persistent photoconductivity LaAlO_(3)/SrTiO_(3)heterostructures Two-dimensional electron gases Oxygen vacancies Low-frequency noise Spectral analyses

Current status and challenges in sentinel node navigation surgery for early gastric cancer

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Chinese Journal of Cancer Research 2017年第2期29卷 93-99页

作者： Bang Wool eom Young-II kim Hong Man Yoon Soo-Jeong Cho Jong Yeul Lee Chan Gyookim Soo Jin kim Ji Yoon Rho Seok ki kim Myeong-Cherl Kook Young-Woo kim Keun Won center for gastric cancer national cancer centerrepublic of korea center for diagnostic oncology national cancer centerrepublic of korea

Although a number of feasibility studies for sentinel node （SN） concepts in gastric cancer have been conducted since 2000, there remains a debate regarding detailed detection techniques and oncological safety. Two important multicenter phase II clinical trials were performed in Japan that used different methods and reached different conclusions; one confirmed acceptable results with a false-negative rate of 7%, and the other showed an unacceptably high false-negative rate of 46.4%. The Sentinel Node Oriented Tailored Approach （SENORITA） trial is a multicenter randomized controlled phase 1/I trial being performed in Korea. Patient enrollment is now complete and the long-term results are currently awaited. Recently, an image-guided SN mapping technique using infrared ray/fluorescence was introduced. This method might be a promising technology because it allows the clear visualization of SNs. With regard to the primary tumor, the non-exposed endoscopic wall-inversion surgery technique and non-exposure endolaparoscopic full-thickness resection with simple suturing technique have been reported. These methods prevent abdominal infection and tumor seeding and can be good alternatives to conventional laparoscopic gastric wedge resection. For indications, SN navigation surgery can be extended to patients who underwent non-curative endoscopic resection. Although a few studies have been performed on these patients, sentinel concepts may be beneficial to patients as they omit the need for additional gastrectomy. SN navigation surgery can lead to actual organ-preserving surgery and plays a key role in improving the quality of life of patients with early gastric cancer in the future.

关键词： Sentinel node navigation surgery early gastric cancer SENORITA

Regeneration of waste SCR catalyst by air lift loop reactor

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Journal of Central South University 2013年第5期20卷 1314-1318页

作者： LEE Jung-bin eom Yong-seok kiM Jun-han CHUN Sung-nam Technology Commercialization Office Korea Electric Power Research Institute

A solution of 0.1 mol/L to 1.0 mol/L H2SO4 can dissolve alkali metals and alkaline earth metals which weaken an active site of SCR catalyst. The waste catalyst washed with 0.5 mol/L H2SO4 regained the best catalytic activity. When a concentration of the sulfuric acid is less than 0.5 mol/L, sufficient cleaning effects cannot be obtained. In contrast, when the concentration is greater than 1.0 tool/L, the active components, vanadium and tungsten are undesirably eluted. The total BET surface of the catalyst regenerated by air lift loop reactor showed almost the same as that of fresh catalyst due to the removal of insoluble compounds which may be penetrated into pores of catalyst. The addition of a solution of 0.075 mol/L ammonium vanadate （NHnVO3） and 0.075 mol/L ammonium paratungstate （5（NH4）20· 12WO3-5H20） to 0.1 mol/L H2SO4 significantly increases the activity of the waste catalyst.

关键词： nitrogen oxide regeneration selective catalyst reduction air lift loop reactor catalyst

Predictive value of E-cadherin and Ep CAM for detection of metastatic lymph node in early gastric cancer

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Chinese Journal of Cancer Research 2020年第5期32卷 614-620页

作者： Bang Wool eom Keun Won Ryu Hong Man Yoon Myeong-Cherl Kook Center for Gastric Cancer National Cancer CenterGoyang-si 10408Republic of Korea

Objective:There has been a demand for a tumor-specific marker for metastatic lymph nodes in sentinel navigation surgery for gastric *** aim of this study is to analyze protein expression in both primary tumors and metastatic lymph nodes in early gastric cancer ***:We collected primary tumors and metastatic lymph nodes from 71 patients who underwent curative gastrectomy and pathologically diagnosed with T1 N1 or T1 N2(8 th Union for International Cancer Control 8 th edition/American Joint Committee on Cancer staging system)gastric *** was used to determine the expression of six cell membrane proteins,including carcinoembryonic antigen(CEA),E-cadherin,epithelial cell adhesion molecule(Ep CAM),P-cadherin,CD44 v6,and c-erb B2 in the patient ***:The expression of CEA,E-cadherin,Ep CAM,P-cadherin,CD44 v6 and c-erb B2 in the evaluable primary tumor samples was 75.4%,97.1%,100%,89.9%,11.1%and 7.2%,*** cases wherein both the primary tumor and metastatic lymph nodes were evaluable,double positivity(expression in both primary tumor and metastatic lymph nodes)was observed for CEA,E-cadherin,Ep CAM,P-cadherin,CD44 v6 and c-erb B2 in 53.2%,97.9%,98.1%,76.6%,0 and 6.8%of the cases,*** proportion of metastatic lymph nodes positive for CEA,E-cadherin,Ep CAM,P-cadherin,CD44 v6 and c-erb B2 was 71.4%,100%,98.1%,83.7%,0,and75%,respectively in primary tumors positive for the same ***:E-cadherin and Ep CAM had an overlap of 100%and 98.1%between the primary tumor and metastatic lymph nodes,***,E-cadherin and Ep CAM are potential molecular markers to detect metastatic lymph nodes in patients with early gastric cancer.

关键词： Gastric cancer tumor-associated protein E-cadherin EpCAM lymph node

A progressive route for tailoring electrical transport in MoS2

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Nano Research 2016年第2期9卷 380-391页

作者： Muhammad Arslan Shehzad1 Sajjad Hussain Muhammad Farooq Khan Jonghwa eom Jongwan Jung Yongho Seo Graphene Research Institute Sejong University Seoul 143-747 Republic of Korea Faculty of Nanotechnology & Advanced Materials Engineering and Graphene Research Institute Sejong University Seoul 143-74 7Republic of Korea Department of Physics and Graphene Research Institute Sejong University Seoul 143-747 Republic of Korea

Typically, molybdenum disulfide （MoS2） synthesized by chemical vapor deposition （CVD） is polycrystalline; as a result, the scattering of charge carriers at grain boundaries can lead to performances lower than those observed in exfoliated single-crystal MoS2. Until now, the electrical properties of grain boundaries have been indirectly studied without accurate knowledge of their location. Here, we present a technique to measure the electrical behavior of individual grain boundaries in CVD-grown MoS2, imaged with the help of aligned liquid crystals. Unexpectedly, the electrical conductance decreased by three orders of magnitude for the grain boundaries with the lowest on/off ratio. Our study provides a useful technique to fabricate devices on a single-crystal area, using optimized growth conditions and device geometry. The photoresponse, studied within a MoS2 single grain, showed that the device responsivity was comparable with that of the exfoliated MoS2-based photodetectors.

关键词： MoS2 grain boundary liquid crystal electrical properties photoresponse

Ophiobolin B inhibits proliferation of glioblastoma U87MG cells by inducing S phase arrest and caspase-dependent apoptosis

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Ophiobolin B inhibits proliferation of glioblastoma U87MG ce...

Combinations of nerve blocks in surgery for post COVID-19 pulmonary sequelae patient:A case report and review of literature

中国抗癌协会神经肿瘤专业委员会第八届学术会议

作者： ki Seong eom Gil-Saeng Jeong Tae Young kim Department of Neurosurgery College of MedicineWonkwang University College of Pharmacy Wonkwang University

*** Human glioblastoma is the most common primary malignant brain tumor that only weakly responsive to the current therapeutic ***,new therapeutic agents for treat this devastating disease are urgently *** are secondary metabolites of certain fungi belonging to the genera Bipolaris,Drechslera,Cephalosporium and *** sesterterpene-type compounds（C25） are characterized by a unique tricyclic chemical *** B（OPB） is a minor member of a class of phytotoxic metabolites and acts as an inhibitor of calmodulin action in calcium *** has a wide range of biochemical and pharmacological effects,including antitumor activities,but its mechanism of action is not clearly *** this study,we investigated that the relationship between the antiproliferative activities of berberine and the apoptotic pathway associated with its molecular mechanism of action in human glioblastoma U87MG *** and mathods The effect of berberine on cell viability was quantified using MTT *** cytometric analysis was used to measure the cellular DNA *** blot analysis was performed using primary antibodies against p21,p27,cyclin-dependent kinase（CDK）2,CDK4,cyclin B,cyclin A,cyclin E,Bcl-2,Bax,caspase-9,caspase-3,poly（ADPribose） polymerase（PARP）,and *** nuclei of U87MG cells were stained with DAPI in order to assess the degree of *** data shown are a summary of the results from at least three experiments and statistical evaluation of the results was performed by One-way analysis of variance（ANOVA）.*** OPB significantly decreased the cell viability of U87MG cells in a dose-dependent *** cytometry showed a dose dependent increase of S phase arrested after treatment with OPB in U87MG *** blot analysis showed that the OPB-induced S phase arrest was mediated through the increased expression of cyclin-dependent kinase inhibitor（CDki） proteins（p21 and p27） a

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World Journal of Clinical Cases 2023年第5期11卷 1198-1205页

作者： Yehun Jin Suzie Lee Daehyun kim Jangho Hur Woosik eom Department of Anesthesiology and Pain Medicine National Cancer CenterGoyang-si 10408Gyeonggi-doSouth Korea

BACKGROUND Regional anesthesia is a promising method in patients with post coronavirus disease 2019(COVID-19)pulmonary sequelae for preserving pulmonary function and preventing postoperative pulmonary complications,compared with general *** SUMMARY We provided surgical anesthesia and analgesia suitable for breast surgery by performing pectoral nerve block type II(PECS-II),parasternal,and intercostobrachial nerve blocks with intravenous dexmedetomidine administration in a 61-year-old female patient with severe pulmonary sequelae after *** Sufficient analgesia for 7 h was provided via PECS-II,parasternal,and intercostobrachial blocks perioperatively.

关键词： Analgesia Anesthesia COVID-19 Regional anesthesia Nerve block Case report

Bandwidth Allocation Method by Service for WDM EPON

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光学学报 2003年第S1期23卷 775-776页

作者： Yongseok Chang Changgyu Choi Jonghoon eom Sungho kim Dept. of Computer Engineering Kyungpook National University Daegu KoreaDept. of Computer Engineering Kyungpook National University Daegu KoreaTelecommunication Network Laboratory Korea Telecom Jeonmin-dong Yusung-gu Daejeon KoreaDept. of Computer Engineering Kyungpook National University Daegu Korea

A WDM(Wavelength Division Multiplexing) EPON(Ethernet Passive Optical Network) is an economical and efficient access network that has attracted significant research attention in recent years. A MAC(Media Access Control) Protocol of PON is based on TDMA(Time Division Multiple Access) basically, we can classify this protocol into a fixed length slot assignment method suitable for leased line supporting Qos(Quality of Service) and a variable length slot assignment method suitable for LAN/MAN with the best ...

关键词： WDM on Bandwidth Allocation Method by Service for WDM EPON ONU by for

Variable TDMA MAC Protocol For WDM EPON

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光学学报 2003年第S1期23卷 777-778页

作者： Minsuk Jung Yongseok Chang Jonghoon eom Sungho kim Dept. of Computer Engineering Kyungpook National University Daegu KoreaDept. of Computer Engineering Kyungpook National University Daegu KoreaTelecommunication Network Laboratory Korea Telecom Jeonmin-dong Yusung-gu Daejeon KoreaDept. of Computer Engineering Kyungpook National University Daegu Korea

A MAC(Media Access Control) protocol, one of the most important technologies for an EPON(Ethernet Passive Optical Network), contains a scheduling algorithm to avoid collisions in shared links and assigns an effective bandwidth when ONUs (Optical Network Units) transfer signals upward. The current paper proposes a MAC Protocol that operates a TDMA(Time method with a variable slot assignment to overcome short of bandwidth using by the number of n wavelength., the next generation access network. To verify ...

关键词： Variable TDMA MAC Protocol For WDM EPON for OPNET MAC TDMA

Initial Stability Study of Calcium Phosphate Coated Dental Implants

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Journal of Wuhan University of Technology(Materials Science) 2005年第B12期20卷 246-248页

作者： Changkook YOU In-sung YEO Tae-kwan eom M W AHN Sukyoung kiM School of Materials Sci. & Eng. Yeungnam University Gyeongbuk 712-749 Korea Department of Dentistry Special War Command Seoul 138-110 Korea R&D Center Osstem Co. Ltd. Yeonsan-Gu Busan 611-073 Korea Dept.of Orthopedic Surgery College of Medicine Yeungnam Univ. Daegu Korea

Thin film of biodegradable calcium phosphate coated on threaded commercially pure titanium （ cp- Ti ） dental implants has been investigated as one of alternatives to eliminate the problem of the long- term instability of plasma sprayed HA coated implants. In order to compare in-vivo bone-to-implant response behavior among as-machined, HA coated and CMP coated groups, each group was implanted into New Zealand white mature male rabbits for 2 and 6 weeks, and then in-vivo biological behavior was examined in terms of H＆E staining. Initial stability and removable torques of implants were compared among three groups. Measured removable torque of CMP coated specimen at 6 weeks after inplantation was significantly higher than that of non-coated group, but slightly lower than that of HA coated group, without any inflammatory response at the surrounding of the implants. The initial stability （ ISQ value ; implant stability quotient ） of CMP coated specimen at 2 weeks after implantation was slightly lower than that of HA coated group and significantly higher than that of non-coated group. However, after 6 weeks, ISQ value of CMP coated group was slightly higher than that of HA coated group and significantly higher than that of non-coated group.

关键词： calcium metaphosphate initial stability RFA ISQ value osseointegration