检索结果-南通市图书馆

Curative resection of leiomyosarcoma of the descending colon with metachronous liver metastasis: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2023年第5期15卷 992-999页

作者： Soo-Hyeon lee Sang-Ho Bae Sang-Cheol lee tae-Sung Ahn Zisun Kim Hae-Il jung Department of Surgery Soonchunhyang University Cheonan HospitalCheonan 31151ChungnamSouth Korea Department of Internal Medicine Soonchunhyang University Cheonan HospitalCheonan 31151ChungnamSouth Korea Department of Surgery Soonchunhyang University Bucheon HospitalBucheon 14584GyeonggiSouth Korea

BACKGROUND Leiomyosarcoma(LMS)has a poor prognosis and rarely originates from the *** resection is possible,surgery is the first treatment most commonly ***,no standard treatment exists for hepatic metastasis of LMS;although,several treatments,such as chemotherapy,radiotherapy,and surgery,have been ***,the management of liver metastases remains *** SUMMARY We present a rare case of metachronous liver metastasis in a patient with LMS originating from the descending colon.A 38-year-old man initially reported abdominal pain and diarrhea over the previous two *** revealed a 4-cm diameter mass in the descending colon,40 cm from the anal *** tomography revealed intussusception of the descending colon due to the 4-cm *** patient underwent a left *** analysis of the tumor revealed that it was positive for smooth muscle actin and desmin,and negative for cluster of differentiation 34(CD34),CD117,and discovered on gastrointestinal stromal tumor(GIST)-1,which are characteristic of gastrointestinal LMS.A single liver metastasis developed 11 mo postoperatively;the patient subsequently underwent curative resection *** patient remained disease-free after six cycles of adjuvant chemotherapy(doxorubicin and ifosfamide),and 40 and 52 mo after liver resection and primary surgery,*** cases were obtained from a search of Embase,PubMed,MEDLINE,and Google *** Early diagnosis and surgical resection may be the only potential curative options for liver metastasis of gastrointestinal LMS.

关键词： Leiomyosarcoma Colon Liver metastasis Surgical resection Treatment Case report

Ectopic peritoneal paragonimiasis mimicking tuberculous peritonitis:A care report

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第16期10卷 5359-5364页

作者： jung Woo Choi Chang Min lee Seong Je Kim Se In Hah Ji Yoon Kwak Hyun Chin Cho Chang Yoon Ha Woon tae jung Ok Jae lee Department of Internal Medicine Gyeongsang National University College of Medicine and Gyeongsang National University HospitalJinju 52727South Korea Institute of Health Sciences Gyeongsang National UniversityJinju 52828South Korea

BACKGROUND The most common site of paragonimiasis is in the *** migratory route passes through the duodenal wall,peritoneum,and diaphragm to the lungs;thus,the thoracic cavity and central nervous system,as well as the liver,intestine,and abdominal cavity may be ***,we present a case of intraperitoneal paragonimiasis without other organ involvement,mimicking tuberculous *** SUMMARY A 57-year-old man presented with recurrent abdominal pain for 4 *** examination revealed tenderness in the right lower *** findings showed complete blood counts within the normal range without *** reactive lymph nodes and diffuse peritoneal infiltration were noted on abdominal computed tomography(CT).There were no abnormalities on chest CT or *** findings of diagnostic laparoscopy for the differential diagnosis of tuberculous peritonitis and peritoneal carcinomatosis included multiple small whitish nodules and an abscess in the *** reports confirmed the presence of numerous eggs of Paragonimus westermani(***).A postoperative serum enzyme-linked immunosorbent assay revealed *** *** and repetitive history-taking led him to retrospectively recall the consumption of freshwater *** 3 d of treatment with praziquantel(1800 mg;25 mg/kg),he recovered from all *** In patients who require diagnostic laparoscopy for the differential diagnosis of tuberculous peritonitis and peritoneal carcinomatosis,repetitive history-taking and preoperative serologic antibody tests against Paragonimus may be helpful in diagnosing intraperitoneal paragonimiasis without other organ involvement.

关键词： Differential diagnoses Intraperitoneal abscess Paragonimiasis Paragonimus westermani Peritonitis Tuberculosis Case report

Multifunctional Ir–Ru alloy catalysts for reversal-tolerant anodes of polymer electrolyte membrane fuel cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第1期60卷 105-112页

作者： Seung Woo lee Bongho lee Chaekyung Baik tae-Yang Kim Chanho Pak Graduate Program of Energy Technology School of Integrated TechnologyInstitute of Integrated TechnologyGwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Research Institute for Solar and Sustainable Energies Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea

To address the problem of fuel starvation in fuel-cell electric vehicles,which causes cell voltage reversal and results in cell failure when repeated continuously,we developed a reversal-tolerant anode(RTA) to promote water oxidation in preference to carbon *** carbon-supported Ir-Ru alloys with different compositions are employed as RTA catalysts in an acidic polyol solution and are shown to exhibit composition-dependent average crystallite sizes of <5.33 *** adopted approach allows the generation of relatively well-dispersed Ir-Ru alloy nanoparticles on the carbon support without severe *** activity of IrRu_(2)/C for the hydrogen oxidation reaction is 1.10 times that of the stateof-the-art Pt/C *** reversal testing by simulation of fuel starvation reveals that the durability of IrRu_(2)/C(~7 h) significantly exceeds that of the conventional Pt/C catalyst(~10 min) and is the highest value reported so ***,the developed Ir-Ru alloy catalyst can be used to fabricate practical RTAs and replace Pt catalysts in the anodes of polymer electrolyte membrane fuel cells.

关键词： Polymer electrolyte membrane fuel cell Polyol process Reversal-tolerant anode Oxygen evolution reaction Hydrogen oxidation reaction

Interface engineering of an electrospun nanofiber-based composite cathode for intermediate-temperature solid oxide fuel cells

在线全文

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2023年第1期5卷 345-353页

作者： Seo Ju Kim Deokyoon Woo Donguk Kim tae Kyeong lee Jaeyeob lee Wonyoung lee School of Mechanical Engineering Sungkyunkwan UniversitySuwonKyunggi-do 16419Republic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

Sluggish oxygen reduction reaction(ORR)kinetics are a major obstacle to developing intermediate-temperature solid-oxide fuel cells(IT-SOFCs).In particular,engineering the anion defect concentration at an interface between the cathode and electrolyte is important for facilitating ORR kinetics and hence improving the electrochemical *** developed the yttria-stabilized zirconia(YSZ)nanofiber(NF)-based composite cathode,where the oxygen vacancy concentration is controlled by varying the dopant cation(Y2O3)ratio in the YSZ *** composite cathode with the optimized oxygen vacancy concentration exhibits maximum power densities of 2.66 and 1.51 W cm^(−2)at 700 and 600℃,respectively,with excellent thermal stability at 700℃ over 500 h under 1.0 A cm^(−2).Electrochemical impedance spectroscopy and distribution of relaxation time analysis revealed that the high oxygen vacancy concentration in the NF-based scaffold facilitates the charge transfer and incorporation reaction occurred at the interfaces between the cathode and *** results demonstrate the high feasibility and potential of interface engineering for achieving IT-SOFCs with higher performance and stability.

关键词： solid oxide fuel cells nanofiber infiltration oxygen reduction reactions oxygen vacancy

Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 397-408页

作者： Md Ahasan Habib Shusen Lin Mehedi Hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon lee Department of Electronic Engineering College of Electronics and Information Kwangwoon University

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar （SCP）,denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm2in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm2in 1 M KOH,outperforming the standard benchmark electrodes of RuO2||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm2high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2production.

关键词： Advanced electrocatalyst High current Corrosion resistance Industrial requirement

Accelerated biodegradation of iron-based implants via tantalum-implanted surface nanostructures

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2022年第3期7卷 239-250页

作者： Min-Kyu lee Hyun lee Cheonil Park In-Gu Kang Jinyoung Kim Hyoun-Ee Kim Hyun-Do jung tae-Sik Jang Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL60208USA Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheon14662Republic of Korea Department of Biotechnology The Catholic University of KoreaBucheon14662Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju61452Republic of Korea

In recent years,pure iron(Fe)has attracted significant attention as a promising biodegradable orthopedic implant material due to its excellent mechanical and biological ***,in physiological conditions,Fe has an extremely slow degradation rate with localized and irregular degradation,which is problematic for practical *** this study,we developed a novel combination of a nanostructured surface topography and galvanic reaction to achieve uniform and accelerated degradation of an Fe *** target-ion induced plasma sputtering(TIPS)technique was applied on the Fe implant to introduce biologically compatible and electrochemically noble tantalum(Ta)onto its surface and develop surface nano-galvanic *** tests revealed that the uniformly distributed nano-galvanic corrosion cells of the TIPS-treated sample(nano Ta-Fe)led to relatively uniform and accelerated surface degradation compared to that of bare ***,the mechanical properties of nano Ta-Fe remained almost constant during a long-term in vitro immersion test(~40 weeks).Biocompatibility was also assessed on surfaces of bare Fe and nano Ta-Fe using in vitro osteoblast responses through direct and indirect contact assays and an in vivo rabbit femur medullary cavity implantation *** results revealed that nano Ta-Fe not only enhanced cell adhesion and spreading on its surface,but also exhibited no signs of cellular or tissue *** results demonstrate the immense potential of Ta-implanted surface nanostructures as an effective solution for the practical application of Fe-based orthopedic implants,ensuring long-term biosafety and clinical efficacy.

关键词： Iron Tantalum Ion implantation Biodegradation Orthopedic implants

Densification simulation of compacted Al powders using multi-particle finite element method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第B09期19卷 68-75页

作者： Kyung-Hun lee jung-Min lee Byung-Min KIM School of Mechanical Engineering Pu san National University

The powder compaction simulations were performed to demonstrate deformation behavior of particles and estimate the effect of different punch speeds and particle diameters on the relative density of powder by a multi-particle finite element model(MPFEM). Individual particle discretized with a finite element mesh allows for a full description of the contact mechanics. In order to verify the reliability of compaction simulation by MPFEM, the compaction tests of porous aluminum with average particle size of 20 μm and 3 μm were performed at different ram speeds of 5, 15, 30 and 60 mm/min by MTS servo-hydraulic tester. The results show that the slow ram speed is of great advantage for powder densification in low compaction force due to sufficient particle rearrangement and compaction force increases with decrease in average particle size of aluminum.

关键词：粉末压实粉末粒子多孔铝有限元法模拟致密化平均粒径有限元模型

High performance of TiO_(2)/Cu_(x)O photoelectrodes for regenerative solar energy storage in a vanadium photoelectrochemical cell

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2022年第4期7卷 704-711页

作者： Harin Yoo Doohwan lee jung Hyeun Kim Department of Chemical Engineering University of Seoul163 SiripdaeroDongdaemun-guSeoul02504South Korea

Photocatalysts for harvesting solar energy to either electricity or chemical fuels have attracted much attention recently, but they have big obstacles such as wide bandgaps and rapid charge recombinations to overcome for final applications. In this study, we investigates a useful method to utilize vanadium redox pairs, which are commonly applied for vanadium redox flow batteries, to diminish charge recombinations and thus to enhance photocurrent response in regenerative solar energy storage. The results reveal significant improvements in photocurrent density by forming cuprous and cupric oxides in TiO_(2)/Cu_(x)O electrodes under solar AM 1.5 illuminations using the vanadium photoelectrochemical storage cell at 0.025 mol L^(-1) of vanadium redox species in the acid electrolytes. In addition, the stabilized photocurrent density of the copper content optimized TiO_(2)/Cu_(x)O electrodes is almost tripled from the TiO_(2) only electrode because the charge recombinations can be mitigated with the content optimized TiO_(2)/Cu_(x)O electrodes. Therefore, the optimized TiO_(2)/Cu_(x)O electrode results in the highest charge storing performance in the catholyte chamber, and the roles of vanadium redox species are also clearly demonstrated.

关键词： Photocatalyst Photoelectrochemical Copper oxide Charge recombination Redox pairs

Lattice Preferred Orientation, Water Content, and Seismic Anisotropy of Orthopyroxene

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2010年第5期21卷 555-568页

作者： Haemyeong jung Munjae Park Sejin jung Jaeseok lee Tectonophysics Laboratory School of Earth and Environmental Sciences Seoul National University Seoul 151-747 Korea

Lattice preferred orientation （LPO） and seismic anisotropy of orthopyroxene （enstatite） in mantle xenoliths from Spitsbergen, Svalbard, near the Arctic, are studied. LPOs of enstatite were determined using electron backseattered diffraction （EBSD）. We found four types of LPOs of orthopyroxene and defined them as type-AC, -AB, -BC, and -ABC. Type-AC LPO of orthopyroxene is defined as （100） plane aligned subparallel to foliation and [001] axis aligned subparallel to lineation. Type-AB LPO is defined as （100） plane aligned subparallel to foliation and [010] axis aligned subparallel to linea- tion. Type-BC LPO is defined as （010） plane aligned subparallel to foliation and [001] axis aligned subparallel to lineation. Type-ABC LPO is defined as both （100） and （010） planes aligned subparallel to foliation with a girdle distribution of both [100] and [010] axes normal to lineation and [001] axis aligned subparallel to lineation. We report for the first time the type-AB, -BC, and -ABC LPO of orthopyroxerie. We found that the LPO pattern has a correlation with the content of orthopyroxene in the specimen. Nicolet 6700 FTIR （Fourier transformation infrared） study of enstatite showed that type-AC LPO was observed mostly in the samples of enstatite with low water content. It is found that the strength of the LPO of enstatite decreases with increasing water content and has a correlation with the strength of the LPO of olivine： the stronger the LPO of enstatite, the stronger the LPO of olivine. Seismic anisotropy of enstatite was smaller than that of olivine in the same specimen.

关键词： orthopyroxene lattice preferred orientation seismic anisotropy mantle xenolith Spitsbergen FTIR.