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Electrophoretic deposition of a supercapacitor electrode of activated carbon onto an indium-tin-oxide substrate using ethyl cellulose as a binder

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Journal of Materials Science & Technology 2020年第23期58卷 188-196页

作者： taeuk kim Seong-hoon Yi Sang-Eun Chun School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea

A transparent energy storage device is an essential component for transparent *** increasing demand for high-power devices stimulates the development of transparent supercapacitors with high power density.A transparent electrode for such supercapacitors can be assembled via the electrophoretic deposition of an active material powder with a binder onto a transparent *** properties of the binder critically influence the electrochemical behavior and performance of the resulting *** cellulose(EC)is known as an eco-friendly,transparent,flexible,and inexpensive ***,we fabricated an electrode film with EC binder via electrophoretic deposition on an indium tin oxide(ITO)substrate instead of using the conventional polytetrafluoroethylene(PTFE)*** assembled electrodes with EC and PTFE were compared to investigate the feasibility of EC as a binder from different perspectives,including homogeneity,wettability,electrochemical behavior,and mechanical *** EC enabled the formation of a homogeneous film composed of smaller particles and with a higher specific capacitance compared with films prepared with *** annealing improved the adhesion strength of the EC because of its glass transition;however,its hydrophobic nature limited utilization of the active material for charge *** electrochemical activation improved the wettability of the electrode,resulting in an increased capacitance of 60 F g^(-1).Furthermore,even with the lower wettability of EC compared with that of PTFE,better rate performance was possible with the EC *** increased mechanical stability after the annealing process ensured an excellent cycle life of 95%capacitance retention for 15,000 cycles.

关键词： Electrophoretic deposition Transparent electrode Activated carbon Ethyl cellulose Indium tin oxide

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Removal of press-through-packs impacted in the upper esophagus using an overtube

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World Journal of Gastroenterology 2006年第36期12卷 5909-5912页

作者： Yeon Seok Seo Jong-Jae Park Ji hoon kim Jin Yong kim Jong Eun Yeon Jae Seon kim Kwan Soo Byun Young-tae Bak Department of Internal Medicine Korea University Medical Center Guro Hospital Seoul Korea Department of Internal Medicine Sungkyunkwan University School of Medicine Seoul Korea

Foreign bodies in the upper esophagus should be re-moved as soon as possible to avoid serious complica-tions. However, removals of foreign bodies in the upper esophagus are very difficult, especially if they have sharp edges, such as press-through-packs (PTPs). We expe-rienced four cases of the impacted PTPs in the upper esophagus which was successfully extracted endoscopi-cally with the overtube. Because two edges of PTPs were so firmly impacted in the esophageal wall in all cases, the PTPs were not movable in the upper esophagus. However, after insertion of the overtube, PTPs became movable and were successfully extracted and no serious complications occurred after extraction of PTPs. In one case, insertion of the overtube rapidly expanded the up-per esophagus and PTP progressed to the gastric cavity and it could be extracted with the endoscopic protector hood. The endoscopic removal with the overtube was a simple, safe and effective technique for the removal of the impacted PTPs in upper esophagus.

关键词： Esophagus Foreign body Endoscopy

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Nutritional risk index as a predictor of postoperative wound complications after gastrectomy

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World Journal of Gastroenterology 2012年第7期18卷 673-678页

作者： Cheong Ah Oh Dae hoon kim Seung Jong Oh Min Gew Choi Jae Hyung Noh tae Sung Sohn Jae Moon Bae Sung kim Department of Surgery Samsung Medical CenterSungkyunkwan University School of Medicine50 Irwon-dongGangnamguSeoul 135-710South Korea

AIM： To investigate the correlation between the nutri- tional risk index （NRI） and postoperative wound com- plications.

关键词： Nutritional risk index Wound complication Gastric cancer

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Chemical ablation of the gallbladder using alcohol in cholecystitis after palliative biliary stenting

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World Journal of Gastroenterology 2009年第16期15卷 2041-2043页

作者： tae hoon Lee Sang-Heum Park Sang Pil kim Ji-Young Park Chang Kyun Lee Il-Kwun Chung Hong Soo kim Sun-Joo kim Division of Gastroenterology Department of Internal MedicineSoonchunhyang University College of MedicineCheonan Hospital

Chemical ablation of the gallbladder is effective in patients at high risk of complications after surgery. Percutaneous gallbladder drainage is an effective treatment for cholecystitis; however, when the drain tube cannot be removed because of recurrent symptoms, retaining it can cause problems. An 82-year-old woman presented with cholecystitis and cholangitis caused by biliary stent occlusion and suspected tumor invasion of the cystic duct. We present successful chemical ablation of the gallbladder using pure alcohol, through a percutaneous gallbladder drainage tube, in a patient who developed intractable cholecystitis with obstruction of the cystic duct after receiving a biliary stent. Our results suggest that chemical ablation therapy is an effective alternative to surgical therapy for intractable cholecystitis.

关键词： Percutaneous cholecystostomy Cholecystitis Biliary stenting Alcohol Chemical therapy

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Electrodeposition behavior and characteristics of Ni-carbon nanotube composite coatings

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 68-72页

作者： Sung-Kyu kim tae-Sung OH Department of Materials Science and Engineering Hongik University

Ni-CNT (carbon nanotube) composite coatings were processed by electrodeposition and their hardness and corrosion characteristics were investigated with variations of CNT concentration in an electrolyte solution and electrodeposition current density. With increasing the CNT concentration in the electrodeposition bath and the current density, more CNTs are incorporated into Ni matrix. Hardness values of the Ni-CNT coatings are irrelevant to the CNT concentration in the solution, the current density, and current mode, implying poor adhesion of CNTs to Ni matrix. With increasing the CNT content in the coating, the corrosion resistance of the Ni-CNT composite coating becomes inferior due to the porous microstructure.

关键词： composite coating carbon nanotube electrodeposition

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Direct acetylation of a conserved threonine of RIN4 by the bacterial effector HopZ5 or AvrBsT activates RPM1-dependent immunity in Arabidopsis

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Molecular Plant 2021年第11期14卷 1951-1960页

作者： Arabidopsis Sera Choi Maxim Prokchorchik Hyeonjung Lee Ravi Gupta Yoonyoung Lee Eui-Hwan Chung Buhyeon Cho Min-Sung kim Sun tae kim Kee hoon Sohn Department of Life Sciences Pohang University of Science and TechnologyPohang 37673Republic of Korea School of Interdisciplinary Bioscience and Bioengineering Pohang University of Science and TechnologyPohang 37673Republic of Korea Department of Plant Bioscience Life and Industry Convergence Research InstitutePusan National UniversityMiryang 50463Republic of Korea Department of Botany School of Chemical and Life SciencesJamia HamdardHamdard NagarNew Delhi 110062India Division of Biotechnology Korea UniversitySeoul 02841Republic of Korea The Institute of Crop Science and Resource Conservation(INRES) University of BonnNussallee 953115 BonnGermany

Plant pathogenic bacteria deliver effectors into plant cells to suppress immunity and promote pathogen survival;however, these effectors can be recognised by plant disease resistance (R) proteins to activate innate immunity. The bacterial acetyltransferase effectors HopZ5 and AvrBsT trigger immunity in Arabidopsis thaliana genotypes lacking SUPPRESSOR OF AVRBST-ELICITED RESISTANCE 1 (SOBER1). Using an Arabidopsis accession, Tscha-1, that naturally lacks functional SOBER1 but is unable to recognise HopZ5, we demonstrate that RESISTANCE TO P. SYRINGAE PV MACULICOLA 1 (RPM1) and RPM1-INTERACTING PROTEIN 4 (RIN4) are indispensable for HopZ5- or AvrBsT-triggered immunity. Remarkably, T166 of RIN4, the phosphorylation of which is induced by AvrB and AvrRpm1, was directly acetylated by HopZ5 and AvrBsT. Furthermore, we demonstrate that the acetylation of RIN4 T166 is required and sufficient for HopZ5- or AvrBsT-triggered RPM1-dependent defence activation. Finally, we show that SOBER1 interferes with HopZ5- or AvrBsT-triggered immunity by deacetylating RIN4 T166. We have thus elucidated detailed molecular mechanisms underlying the activation and suppression of plant innate immunity triggered by two bacterial acetyltransferases, HopZ5 and AvrBsT from different bacterial pathogens.

关键词： Acetyltransferase effectors Effector-triggered immunity Immunity suppressors NLR Plant deacetylase Plant immunity

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Driving characteristics of octagon-type ultrasonic motor

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Journal of Central South University 2013年第1期20卷 71-75页

作者： kim Jong-Wook PARK Choong-Hyo LIM Jung-hoon JEONG Seong-Su PARK Jong-Kyu PARK tae-Gone Changwon National University Sarim-dongChangwon-siGyeongsangnam-do641-773Korea

Structure of the octagon-type ultrasonic motor was proposed and designed so as to allow the motor to drive small actuator. The stator of the motor consisted of the octagon shape elastic body and four rectangular plate ceramics. The four ceramics were attached to outer surfaces of the octagon elastic body. The same phase voltages were applied to the ceramics on horizontal surfaces, and 90° phase difference voltages were applied to the ceramics on vertical surfaces. When the AC voltage with 90° phase difference was applied in ceramics, the elliptical displacement of unimorph bars was generated by generating bending vibration. To find the maximum displacement model that generates elliptical displacement at the centers of the inner surfaces, the finite element analysis program ATILA was used. The analyzed results were compared to the experimental results. As a result, the speed and torque are increased linearly by increasing the input voltage and the speed of motors can be controlled by changing the applied voltages.

关键词： octagon-type 90° phase difference ultrasonic motor ATILA

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Pendulation reduction on ship-mounted container crane via T-S fuzzy model

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Journal of Central South University 2012年第1期19卷 163-167页

作者： JANG Jae hoon KWON Sung-Ha JEUNG Eun tae Department of Control and Instrumentation Changwon National UniversityChangwon 641-773Korea

Ship-mounted container cranes are challenging industrial applications of nonlinear pendulum-like systems with oscillating disturbance which can cause them *** wave-induced ship motion causes the hoisted container to swing during the transfer operation,the swing motion may be dangerously large and the operation must be *** order to reduce payload pendulation of ship-mounted crane,nonlinear dynamics of ship-mounted crane is derived and a control method using T-S fuzzy model is *** results are given to illustrate the validity of the proposed design method and pendulation of ship-mounted crane is reduced significantly.

关键词： ship-mounted crane disturbance pendulation control T-S fuzzy model

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Reliable beacon transmission based MAC protocol for LR-WPANs over WLAN interferences

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第6期15卷 470-481页

作者： Ji-hoon PARK Byung-Seo kim ITO Business Division Nongshim Data System Department of Computer and Information Communications Engineering Hongik University

The use of IEEE 802.15.4 standard based application systems has been rapidly increasing, for example, in medical services, sensor networks, public safety systems, and home automation systems. However, issues arise from the fact that IEEE 802.15.4 standard based low rate wireless personal area networks(LR-WPANs) use the same frequency bands as wireless local area networks(WLANs), and they interfere with each other. Based on past research on this issue, the interference has a more serious impact on LR-WPANs' performance than on WLANs' performance. In this paper we propose a method to improve LR-WPANs' performance while coexisting with WLANs, which is called the reliable beacon transmission based medium access control(MAC) protocol. Since the reliability of a beacon frame is important, in this method, only the beacon frame is transmitted in interference-free channels, and the data packets are transmitted in interfered channels instead of abandoning the channels altogether. This method increases the reliability of beacon frames as well as overall channel utilizations. The effectiveness of the proposed method was evaluated through extensive simulations, and this paper proves that this method improves the performance of IEEE 802.15.4 based wireless sensor networks(WSNs) over WLANs' interferences.

关键词： Low rate wireless personal area network(LR-WPAN) Interference Wireless local area network(WLAN) Beacon

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Tailoring local structures of atomically dispersed copper sites for highly selective CO_(2) electroreduction

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Carbon Energy 2024年第4期6卷 79-90页

作者： Kyung‐Jong Noh Byoung Joon Park Ying Wang Yejung Choi Sang‐hoon You Yong‐tae kim Kug‐Seung Lee Jeong Woo Han Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbukRepublic of Korea Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbukRepublic of Korea Pohang Accelerator Laboratory(PAL) Beamline DivisionPohangGyeongbukRepublic of Korea

Atomically‐dispersed copper sites coordinated with nitrogen‐doped carbon(Cu–N–C)can provide novel possibilities to enable highly selective and active electrochemical CO_(2) reduction ***,the construction of optimal local electronic structures for nitrogen‐coordinated Cu sites(Cu–N_(4))on carbon remains ***,we synthesized the Cu–N–C catalysts with atomically‐dispersed edge‐hosted Cu–N_(4) sites(Cu–N_(4)C_(8))located in a micropore between two graphitic sheets via a facile method to control the concentration of metal ***‐hosted Cu–N_(4)C_(8) catalysts outperformed the previously reported M–N–C catalysts for CO_(2)‐to‐CO conversion,achieving a maximum CO Faradaic efficiency(FECO)of 96%,a CO current density of–8.97 mA cm^(–2) at–0.8 V versus reversible hydrogen electrode(RHE),and over FECO of 90%from–0.6 to–1.0 V versus *** studies revealed that the micropore of the graphitic layer in edge‐hosted Cu–N_(4)C_(8) sites causes the d‐orbital energy level of the Cu atom to shift upward,which in return decreases the occupancy of antibonding states in the*COOH *** research suggests new insights into tailoring the locally coordinated structure of the electrocatalyst at the atomic scale to achieve highly selective electrocatalytic reactions.

关键词： atomic local structure density functional theory electrochemical CO_(2)reduction metal nitrogen‐doped carbon single‐atom catalyst

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