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A sulfur self-doped multifunctional biochar catalyst for overall water splitting and a supercapacitor from Camellia japonica flowers

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Carbon Energy 2022年第4期4卷 491-505页

作者： Chengkai Xia Subramani Surendran Seulgi Ji Dohun Kim Yujin Chae Jaekyum Kim Minyeong Je Mi-Kyung han Woo-Seok Choe Chang Hyuck Choi Heechae Choi jung Kyu Kim Uk Sim School of Chemistry Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology(KENTECH)NajuRepublic of Korea Department of Materials Science&Engineering Chonnam National UniversityGwangjuRepublic of Korea Theoretical Materials&Chemistry Group University of CologneCologneGermany Research Institute NEEL SciencesInc.NajuSouth Korea Department of Chemistry Pohang University of Science and Technology(POSTECH)Gyeongsangbuk-doRepublic of Korea

A versatile use of a sulfur self-doped biochar derived from Camellia japonica(camellia)flowers is demonstrated as a multifunctional catalyst for overall water splitting and a *** native sulfur content in the camellia flower facilitates in situ self-doping of sulfur,which highly activates the camellia-driven biochar(SA-Came)as a multifunctional catalyst with the enhanced electron-transfer ability and long-term *** water splitting,an SA-Came-based electrode is highly stable and shows reaction activities in both hydrogen and oxygen evolution reactions,with overpotentials of 154 and 362 mV at 10 mA cm^(−2),*** supercapacitors,SA-Came achieves a specific capacitance of 125.42 F g^(−1)at 2 A g^(−1)and high cyclic stability in a three-electrode system in a 1 M KOH *** demonstrated a high energy density of 34.54 Wh kg^(−1)at a power density of 1600 W kg^(−1)as a symmetric hybrid supercapacitor device with a wide working potential range of 0-1.6 V.

关键词： activated carbon biomass supercapacitor sustainable chemistry water splitting

The Conserved Proline Residue in the LOB Domain of LBD18 Is Critical for DNA-Binding and Biological Function

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Molecular Plant 2013年第5期6卷 1722-1725页

作者： han Woo Lee Min-jung Kimb MoungYeon Park Kyung-Hwan han jungmook Kim Department of Bioenergy Science and Technology Chonnam National University Gwangju 500-757 Korea Department of Plant Biotechnology Chonnam National University Gwangju 500-757 Korea Department of Horticulture and Department of Forestry Michigan State University East Lansing MI 48824-1222 USA Kumho Life Science Laboratory Chonnam National University Buk-Gu Gwangju 500-757 Korea

Dear Editor, The LATERAL ORGAN BOUNDARIES DOMAIN （LBD）/ ASYMMETRICLEAVES2-LIKE （ASL） genes （hereafter referred to as LBD） encode proteins containing a conserved plant-specific LOB domain and play roles in lateral organ development （Iwakawa et al., 2002; Shuai et al., 2002; Majer and Hochholdinger, 2011）. The LOB domain is approximately 100 amino acids in length and contains a conserved four-Cys motif （CX2CX6CX3C）, the Gly-Ala-Ser block （GAS）, and the leucine-zipper-like coiled-coil motif （LX6LX3LX6L）（Shuai et al., 2002）. The leucine-zipper-like coiled-coil motif in the LOB domain is predicted to function in protein dimerization. LOB, AS2, and LBD4 preferentially bind unique DNA sequences in electrophoretic mobility shift assays （EMSAs）（Husbands et al., 2007）. The LOB domain of AS2 cannot be functionally replaced by those of other members of the LOB family,

关键词： LOB 生物学功能 DNA结合保守脯氨酸亮氨酸拉链残基器官发育

Impregnation approach for poly(vinylidene fluoride)/tin oxide nanotube composites with high tribological performance

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Journal of Materials Science & Technology 2020年第2期37卷 19-25页

作者： Min Su Park Jin Kyu Kim Tong-Seok han jung Tae Park Jong Hak Kim Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul03722Korea Department of Civil and Environmental Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul03722Korea Department of Chemical Engineering Konkuk University120 Neungdong-roGwangjin-guSeoul05029Korea

We report a composite material with the high tribological performance,which consists of onedimensional SnO2 nanotubes(ST)and a high molecular weight poly(vinylidene fluoride)(PVDF)matrix in terms of *** of PVDF in N,N-dimethylformamide(DMF)resulted in a facile penetration of PVDF into the inner hollow voids of ST,leading to the close *** between PVDF and ST results in a beneficial effect on the chain arrangement of PVDF,providing anα-phase with better tribological *** ST incorporation,the friction coefficient decreased by 85.0%to 0.408,and the specific wear rate decreased by 69.1%to 0.412,demonstrating the pivotal role of ST as a self-lubricating material due to a large interactive area and PVDF chain rearrangement.

关键词： SnO2 nanotube Composite Friction coefficient Wear rate

Cholecystectomy increases the risk of metabolic syndrome in the Korean population:a longitudinal cohort study

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Hepatobiliary Surgery and Nutrition 2023年第4期12卷 523-533,I0023页

作者： Ji Hye Huh Kyong Joo Lee Yun Kyung Cho Shinje Moon Yoon jung Kim Kyung-Do han Jun Goo Kang Seong Jin Lee Sung-Hee Ihm Department of Internal Medicine Hallym University College of MedicineChuncheonRepublic of Korea Department of Internal Medicine Asan Medical CenterUniversity of Ulsan College of MedicineSeoulRepublic of Korea Department of Statistics and Actuarial Science Soongsil UniversitySeoulRepublic of Korea

Background:Cholecystectomy is a common surgical procedure to treat symptomatic gallstones;however,the long-term outcomes after cholecystectomy are ***,we aimed to investigate whether incident metabolic syndrome(MetS)is associated with cholecystectomy through a large,population-based,longitudinal ***:Subjects aged≥20 years who underwent cholecystectomy from 2010 to 2014(n=76,485)and controls(n=76,485),matched for age and sex,were identified from the Korean National Health Insurance *** proportional hazards analyses were performed to evaluate the association between cases and incident MetS,and hazard ratios and 95% confidence intervals(CIs)were ***:A total of 152,970 patients were *** age was 52.47±12.76 years,and 50.65% of participants were *** the follow-up period,there were 38,979(25.48%)newly diagnosed MetS cases in the study *** risk of MetS in the cholecystectomy group was approximately 20% higher than that in the control group[adjusted odds ratio(OR),1.20;95%CI:1.17-1.23].In the fully adjusted models,the corresponding ORs for new-onset high waist circumference(WC),low high-density lipoprotein cholesterol(HDL-C)levels,high triglycerides(TG)levels,high blood pressure(BP),and high blood glucose levels were 1.16(1.13-1.19),1.19(1.16-1.22),1.25(1.22-1.28),1.27(1.23-1.31),and 1.21(1.18-1.24),*** was an independent risk factor of incident MetS,after adjusting for potential confounding *** the subgroup analyses,the cholecystectomy group had a higher risk of MetS than the control group in subjects without hypertension or dyslipidemia,***:In this large,population-based study,cholecystectomy was associated with an increased risk of developing MetS,independent of other confounding ***,careful monitoring of metabolic variables and long-term follow-up are required to evaluate MetS risk after cholecystectomy.

关键词： Cholecystectomy metabolic syndrome(MetS) obesity diabetes cardiovascular risk

Development of temperature-robust damage factor based on sensor fusion for a wind turbine structure

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Frontiers of Structural and Civil Engineering 2015年第1期9卷 42-47页

作者： Jong-Woong PARK Sung-han SIM Jin-Hak YI Hyung-Jo jung Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign Urbana IL 61801 USA School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 689- 798Republic of Korea Coastal Development & Ocean Engineering Research Division Korea Institute of Ocean Science and Technology Ansan 426-744Republic of Korea Department of Civil and Environmental Engineering KAIST Daejeon 305-701 Republic of Korea

Wind power systems have gained much attention due to the relatively high reliability, maturity in technology and cost competitiveness compared to other renewable alternatives. Advances have been made to increase the power efficiency of the wind turbines while less attention has been focused on structural integrity assessment of the structural systems. Vibration-based damage detection has widely been researched to identify damages on a structure based on change in d^mmic characteristics. Widely spread methods are natural frequency-based, mode shape-based, and curvature mode shape-based methods. The natural frequency-based methods are convenient but vulnerable to environmental temperature variation which degrades damage detection capability; mode shapes are less influenced by temperature variation and able to locate damage but requires extensive sensor instrumentation which is costly and vulnerable to signal noises. This study proposes novelty of damage factor based on sensor fusion to exclude effect of temperature variation. The combined use of an accelerometer and an inclinometer was considered and damage factor was defined as a change in relationship between those two measurements. The advantages of the proposed method are： 1） requirement of small number of sensor, 2） robusmess to change in temperature and signal noise and 3） ability to roughly locate damage. Validation of the proposed method is carried out through numerical simulation on a simplified 5 MW wind turbine model.

关键词： sensor fusion damage detection structural health monitoring

Pathologic etiology and predictors of malignancy in children with cervical lymphadenopathy

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World Journal of Pediatrics 2023年第3期19卷 283-287页

作者： Jee Woo Kim Jee Yeon Baek Ji Young Lee Sung Min Lim Ji-Man Kang Won Kee Ahn Seung Min Hahn jung Woo han Chuh Joo Lyu Jong Gyun Ahn Department of Pediatrics Severance Children's HospitalYonsei University College of Medicine50-1 Yonsei-RoSeodaemun-guSeoul 03722South Korea Institute for Immunology and Immunological Diseases Yonsei University College of MedicineSeoulSouth Korea Division of Pediatric Hematology and Oncology Department of PediatricsYonsei University College of MedicineYonsei University Health SystemSeoulSouth Korea Department of Pediatric Hemato-Oncology Yonsei Cancer CenterYonsei University Health SystemSeoulSouth Korea

Cervical lymphadenopathy in children is a common disease entity that is accompanied by a variety of processes,ranging from benign disease to *** the cause of cer-vical lymphadenopathy in children is often benign[1-4],the presence of enlarged lymph nodes can cause anxiety to parents because of its association with *** should be considered for the histologic diagnosis of persistent or unex-plained cervical lymphadenopathy in ***,biopsy is an invasive examination method,and it is difficult to clinically determine whether biopsy is needed in children with unexplained cervical ***,clini-cians should be aware of the differential diagnosis of lymph node enlargement in children and should identify situations in which malignancy may be *** this study,we aimed to identify the etiology of pediatric cervical lymphadenopathy using biopsy and to analyze the risk factors associated with malignancy in children with cervical lymphadenopathy.

关键词： malignancy cervical diagnosis

多层螺旋CT与磁共振LAVA增强扫描诊断肝内占位性病变性质效能分析

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实用肝脏病杂志 2024年第3期27卷 422-425页

作者：白萍王汉刘芮曾智萍四川省广元市中心医院医学影像科 628000 成都中医药大学附属四川省康复医院医学影像科

目的分析多层螺旋CT与高场强磁共振肝脏三维容积快速扫描(LAVA)诊断肝内占位性病变性质的效能。方法2020年5月~2023年4月我院诊治的160例肝内占位性病变患者,均行多层螺旋CT和LAVA增强扫描,以组织病理学诊断为金标准,计算两种方法的诊... 详细信息

目的分析多层螺旋CT与高场强磁共振肝脏三维容积快速扫描(LAVA)诊断肝内占位性病变性质的效能。方法2020年5月~2023年4月我院诊治的160例肝内占位性病变患者,均行多层螺旋CT和LAVA增强扫描,以组织病理学诊断为金标准,计算两种方法的诊断效能。结果在本组160例肝内占位性病变患者中,组织病理学诊断恶性病灶87例,包括肝细胞癌(HCC)79例和肝内胆管细胞癌(ICC)8例,和良性病变73例,包括肝硬化结节46例、肝结节状再生性增生(NRHL)20例和肝脏局灶性结节性增生(FNH)7例;CT扫描诊断恶性病灶77例和良性病灶83例,其中将5例良性肿瘤诊断为恶性肿瘤,将15例恶性肿瘤诊断为良性肿瘤,LAVA增强扫描诊断恶性病灶86例和良性病变74例,其中将3例良性肿瘤诊断为恶性肿瘤,将4例恶性肿瘤诊断为良性肿瘤;CT诊断肝内占位性病变的准确率为87.5%、灵敏度为82.8%,特异度为93.2%,阳性预测值为93.5%和阴性预测值为81.9%,而LAVA增强扫描诊断则分别为95.6%、95.4%、95.9%、96.5%和94.6%,显著优于CT诊断(P<0.05)。结论相较于多层螺旋CT扫描,磁共振LAVA增强可更为准确地判断肝内占位性病变的性质,值得临床深入研究。

关键词：肝内占位性病变多层螺旋CT 高场强磁共振肝脏三维容积快速扫描增强诊断

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Experiments and computer simulation analysis of impact behaviors of micro-sized abrasive in waterjet cutting of thin multiple layered materials

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中国有色金属学会会刊：英文版 2012年第S3期22卷 864-869页

作者： jung-han LEE Kang-Su PARK Myung Chang KANG Bo Sik KANG Bo Sung SHIN Engineering Research Center Pusan National University National Core Research Center Pusan National University Mechanical System Safety Research Division Korea Institute of Machinery and Materials

The abrasive waterjet (AWJ) is now widely used in the advanced cutting processes of polymers,metals,glass,ceramics and composite materials like thin multiple-layered material (TMM).Various research and development efforts have recently been made to understand the science of ***,the interaction mechanism between a workpiece and high-velocity abrasive particles still remains a complicated *** this work,the material removal mechanisms of AWJ such as micro penetration and micro dent were experimentally *** addition,a new computer simulation model considering high strain rate effect was proposed to understand the micro impact behavior of high-velocity micro-sized abrasives in AWJ cutting.

关键词： abrasive waterjet thin multiple layered materials micro-sized abrasive micro penetration micro dent

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 mol/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 (NH4VO3) and 0.075 mol/L ammonium paratungstate (5(NH4)2O·12WO3 ·5H2O) to 0.1 mol/L H2SO4 significantly increases the activity of the waste catalyst.

关键词：废催化剂气升式环流反应器 SCR 再生 BET比表面积偏钨酸铵活性位点 mol