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Sarcomatoid carcinoma of the pancreas—multimodality imaging findings with serial imaging follow-up:A case report and review of literature

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World Journal of Clinical Cases 2021年第13期9卷 3102-3113页

作者： Hyun Jae Lim Hye Seon Kang Jeong Eun Lee Ji Hye Min kyung Sook shin Sun Kyoung You kyung-hee Kim Department of Radiology Chungnam National University HospitalDaejeon 35015South Korea Department of Radiology Chungnam National University HospitalChungnam National University College of MedicineDaejeon 35015South Korea Department of Radiology and Center for Imaging Science Samsung Medical CenterSungkyunkwan University School of MedicineSeoul 06351South Korea Department of Pathology Cancer Research InstituteCollege of MedicineChungnam National UniversityDaejeon 35015South Korea

BACKGROUND Sarcomatoid carcinoma of the pancreas is extremely rare and has an extremely poor *** a few cases of sarcomatoid carcinoma of pancreas have been reported,most are focused on a histopathological *** the best of our knowledge,there are no reports documenting multimodality imaging characteristics and chronological changes with emphasis on radiologic *** SUMMARY A 64-year-old woman was admitted to Chungnam National University Hospital with acute ***-enhanced computed tomography of the abdomen revealed a 2.6 cm×2.8 cm multilobular cystic mass in the pancreatic *** pancreatic lesion showed suspected mural nodules and thin ***,mucinous cystic neoplasm of pancreas was *** 7 mo,the patient was readmitted for repeated epigastric abdominal pain and ***-up contrast-enhanced computed tomography of the abdomen and magnetic resonance imaging revealed a marked enlargement(5.4 cm×4 cm),with a predominant internal solid *** mass showed low signal intensity on a T1-weighted image and heterogeneously intermediate high signal intensity on a T2-weighted image. It showed diffusion restriction and peripheral rimenhancement on an arterial phase image, and progressive enhancement on portalvenous and delayed phase images. Distal pancreatectomy was performed. Basedon the morphology and immunohistochemical staining of the specimen,pancreatic sarcomatoid carcinoma was *** present the computed tomography, magnetic resonance imaging, and positronemission tomography computed tomography findings, pathologic features, andchronological changes for preoperative diagnosis.

关键词： Carcinosarcoma Pancreas Computed tomography Magnetic resonance imaging Pancreatectomy Case report

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K2Ti6O13 Nanoparticle-Loaded Porous rGO Crumples for Supercapacitors

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Nano-Micro Letters 2020年第1期12卷 115-123页

作者： Chongmin Lee Sun kyung Kim Hankwon Chang hee Dong Jang Department of Nanomaterials Science and Engineering University of Science and TechnologyYuseong‑guDaejeon 34113Republic of Korea Resources Utilization Research Center Korea Institute of Geoscience and Mineral ResourcesYuseong‑guDaejeon 34132Republic of Korea

One-dimensional alkali metal titanates containing potassium,sodium,and lithium are of great concern owing to their high ion mobility and high specific surface *** those titanates are combined with conductive materials such as graphene,carbon nanotube,and carbon nanofiber,they are able to be employed as efficient electrode materials for *** hexa-titanate(K2Ti6O13,KTO),in particular,has shown superior electrochemical properties compared to other alkali metal titanates because of their large lattice parameters induced by the large radius of potassium ***,we present porous rGO crumples(PGC)decorated with KTO nanoparticles(NPs)for application to *** KTO NP/PGC composites were synthesized by aerosol spray pyrolysis and post-heat *** NPs less than 10 nm in diameter were loaded onto PGCs ranging from 3 to 5μ*** porous structure of the composites was obtained by the activation of rGO by adding an excessive amount of KOH to the *** KTO NP/PGC composite electrodes fabricated at the GO/KOH/TiO2 ratio of 1:3:0.25 showed the highest performance(275 F g−1)in capacitance with different KOH concentrations and cycling stability(83%)after 2000 cycles at a current density of 1 A g−1.

关键词： Potassium hexa-titanate Porous graphene crumples Supercapacitors

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Transcriptomic Responses of Garlic(Allium sativum L.)to Heat and Drought Stresses

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Phyton-International Journal of Experimental Botany 2023年第11期92卷 3077-3090页

作者： Seung hee Eom Tae kyung Hyun Department of Industrial Plant Science and Technology Chungbuk National UniversityCheongju28644Korea

Heat and drought are prominent abiotic stressors that limit crop productivity and yield,particularly concerning climate change;therefore,understanding the molecular mechanisms underlying plant stress responses is crucial for stress-tolerant crop *** study conducted a transcriptomic analysis to elucidate how garlic(Allium sativum L.)responds to drought and heat stress *** libraries were generated to identify differentially expressed genes(DEGs)induced by drought and heat *** classification and clustering analysis of DEGs revealed stress-specific gene expression ***,cell wall-related genes were implicated in the drought response,whereas heat stress was associated with heat stress transcription factors and heat shock *** results provide essential information for future studies on stress tolerances in garlic.

关键词： Differentially expressed gene drought heat garlic transcriptome

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Miniaturized Twin-legged Robot with an Electromagnetic Oscillatory Actuator

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Journal of Bionic Engineering 2018年第1期15卷 106-113页

作者： Buhyun shin Youngshik Kim Jamie Paik kyung-min Lee Department of Mechanical Engineering Hanbat National University 125 Dongseodaero Yuseong-gu Daejeon 34158 Republic of Korea The Institute of Mechanical Engineering EPFL BM 4118 Station 17 1015-Lausanne Switzerland School of Mechanical Engineering Yeungnam University 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea

There have been many studies on the moving mechanism of micro robots, such as stick-slip, inchworm like motion, and impact drive. Novel actuators like lead zirconate titanate （PZT）, Shape Memory Alloy （SMA）, magnetostrictive materials, electromagnetic actuators, electoractive polymers, ultrasonic linear motors, and dielectric elastomers are utilized to realize the moving mechanism. The use of a conventional electromagnetic actuator is unfavorable, because of a few drawbacks, such as generation of stray magnetic fields, hard to miniaturize to the millimeter scale because of 3D integration and a scaling law, and power consumption to maintain a certain position. This research presents a micro robot that uses an electromagnetic actuator customized and developed for micro robot. The electromagnetic actuator is designed from a Brushless Direct Current （BLDC） motor to overcome the drawbacks mentioned above. The developed robot is composed of two electromagnetic actuators. The overall size of the robot is 20 mm × 11 mm× 9 mm （length × height × width） and the weight is 3 g. The developed robot is able to move bidirectionally with a maximum moving speed of 15.76 mm·s︿-1 （0.79 body-length per second）. The optimal conditions of an input signal are calculated theoretically and verified with experiments.

关键词： electromagnetic actuator oscillatory actuator bionic micro robot stick-slip brushless DC motor

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A Miniaturized Tadpole Robot Using an Electromagnetic Oscillatory Actuator

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Journal of Bionic Engineering 2015年第1期12卷 29-36页

作者： Bu Hyun shin kyung-Min Lee Seung-Yop Lee Department of Mechanical Engineering Hanbat National University Daejeon 305-719 Korea Convergence Technology Examination Division Korean Intellectual Property Office Daejeon 302-701 Korea Department of Mechanical Engineering Sogang University Seoul 121-742 Korea

In this paper, we propose a miniaturized tadpole-like robot using an electromagnetic oscillatory actuator. The electro- magnetic actuator has a simple structure with a moving-magnet type and the body size is 13 mm （length） × 11 mm （height） ×10 mm （width）. A tail has the thickness of 100 μm and the length of 20 mm which is twice of the body-length （BL）. The tail attached to the oscillatory actuator generates undulatory propulsion for the forward swimming. Moreover, the tadpole robot enables the change of the direction by controlling input signal pattems applied to the oscillatory actuator. Prototypes of the tadpole robot have been manufactured and the thrust force and swimming speed are measured to evaluate the performance of the biomimetic robot in water at various tail-beat frequencies. The maximum thrust force is 42 mN at the tail-beat frequency of 30 Hz with voltage of 3 V, enabling the tadpole robot to swim at the speed of 210 mm·s^-1 （6 BL·s^-1）. The tadpole robot can also change its moving direction with the angular velocity of 21 deg·s^-1 at the half pulse pattem of 30 Hz.

关键词： fish robot biomimetics tadpole robot electromagnetic actuator

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Inhibiting scar formation via wearable multilayer stacked electret patch:Self-creation of persistent and customizable DC electric field for fibrogenic activity restriction

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InfoMat 2024年第3期6卷 66-80页

作者： Sung-Won Kim Sumin Cho Donghan Lee Jiyu Hyun Sunmin Jang Inwoo Seo Hyun Su Park hee Jae Hwang Hyung-Seop Han Dae Hyeok Yang Heung Jae Chun Suk Ho Bhang Dongwhi Choi School of Chemical Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Biomaterials Research Center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)SeoulRepublic of Korea Department of Medical Life Sciences College of MedicineInstitute of Cell and Tissue EngineeringThe Catholic University of KoreaSeoulRepublic of Korea

Electrical stimulation has recently received attention as noninvasive treatment in skin wound healing with its outstanding biological property for clinical set***,the complexity of equipment for applying appropriate electrical stimulation remains an ongoing ***,we proposed a strategy for skin scar inhibition by providing electrical stimulation via a multilayer stacked electret(MS-electret),which can generate direct current(DC)electric field(EF)without any power supply *** addition,the MS-electret can easily control the intensity of EFs by simply stacking electret layers and maintain stable EF with the surface potential of 3400 V over 5 days owing to the injected charges on the electret *** confirmed inhibition of type 1 collagen andα-SMA expression of human dermal fibroblasts(hDFs)by 90%and 44%in vitro,indicating that the transition of hDFs to myofibroblasts was restricted by applying stable electrical *** further revealed a 20%significant decrease in the ratio of myofibroblasts caused by the MS-electret in *** findings present that the MS-electret is an outstanding candidate for effective skin scar inhibition with a battery-free,physiological electrical microenvironment,and noninvasive treatment that allows it to prevent external infection.

关键词： DC electric field dermal fibroblasts electret scar formation restriction self-creation of electrical stimulation

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Single-atom Pd catalyst anchored on Zr-based metal-organic polyhedra for Suzuki-Miyaura cross coupling reactions in aqueous media

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Nano Research 2021年第2期14卷 486-492页

作者： Seongsoo Kim Seohyeon Jee kyung Min Choi Dong-Sik shin Division of Chemical and Bioengineering Kangwon National UniversityGangwon-do 24341Republic of Korea Department of Chemical and Biological Engineering Sookmyung Womens University100 Cheongpa-ro 47-gilYongsan-guSeoul 04310Republic of Korea

The challenge for single-atom catalysts in various C-C cross coupling reaction exists in the development of solid supporting *** has been desired tofind a supporting material designed in molecular level to anchor a single-atom catalyst and provide high degree of dispersion and substrate access in aqueous ***,we prepared discrete cages of metal-organic polyhedra anchoring single Pd atom(MOP-BPY(Pd))and successfully performed a Suzuki-Miyaura cross coupling reaction with various substrates in aqueous *** was revealed that each tetrahedral cage of MOP-BPY(Pd)has 4.5 Pd atoms on average and retained its high degree of dispersion up to 3 months in *** coupling efficiencies of the Suzuki-Miyaura cross coupling reaction exhibited more than 90.0%for various substrates we have tested in the aqueous media,which is superior to those of the molecular Pd complex and metal-organic framework(MOF)anchoring Pd ***,MOP-BPY(Pd)was successfully recovered and recycled without performance degradation.

关键词： metal-organic polyhedra Suzuki-Miyaura cross coupling reaction structure characterization aqueous phase reaction high-degree of dispersion

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Properties of multilayer gallium and aluminum doped ZnO(GZO/AZO) transparent thin films deposited by pulsed laser deposition process

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 96-99页

作者： Jin-Hyun shin Dong-Kyun shin hee-Young LEE Jai-Yeoul LEE Department of Materials Engineering Yeungnam University

Multilayer gallium and aluminum doped ZnO （GZO/AZO） films were fabricated by alternative deposition of Ga-doped zinc oxide（GZO） and Al-doped zinc oxide（AZO） thin film by using pulsed laser deposition（PLD） process. The electrical and optical properties of these GZO/AZO thin films were investigated and compared with those of GZO and AZO thin films. The GZO/AZO （1：1） thin film deposited at 400 ~C shows the electrical resistivity of 4.18 x 10 4 ~.cm, an electron concentration of 7.5 x 1020/cm3, and carrier mobility of 25.4 cm2/（V.s）. The optical transmittances of GZO/AZO thin films are over 85%. The optical band gap energy of GZO/AZO thin films linearly decreases with increasing the AI ratio.

关键词： multilayer thin films Ga-doped zinc oxide Al-doped zinc oxide pulsed laser deposition

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Study on the current structure of the thermohaline front in the southeastern entrance of the Yellow Sea during winter

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Acta Oceanologica Sinica 2015年第12期34卷 29-36页

作者： OH kyung-hee LEE Seok LIE Heung-Jae JUNG kyung Tae QIAO Fangli Korea Institute of Ocean Science and Technology First Institute of Oceanography State Oceanic Administration

A thermohaline front is located at the southeastern entrance of the Yellow Sea in winter, and it is generated by the intrusion of warm saline water into the Yellow Sea caused by a strong northerly wind. Recently, a westward transversal current traveling away from the west coast of Korea toward the open sea area along the front was reported. The westward transversal current is dominant in the surface layer during the temperature inversion period. The formation and structure of this current are examined using a numerical vertical ocean-slice *** two different water masses meet, a front is formed and adjusted geostrophically. In this frontal zone, a horizontal pressure gradient flow by the vertically inclined isopycnal occurs under the thermal wind process in a baroclinic effect, and the cold fresh coastal water moves westward along the front in the upper layer. The barotropic effect across the front and the bottom friction effect strengthen the westward component of the velocity. The velocity of the bottom layer decreases remarkably in the increase of the bottom drag coefficient. This means that the bottom friction with the strong background tidal current causes a reduction in the current in the bottom layer.

关键词： Geostrophic adjustment Southeastern Yellow Sea Thermohaline front Thermal wind Westward transversal current

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Breast adenoid cystic carcinoma arising in microglandular adenosis:A case report and review of literature

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World Journal of Clinical Cases 2021年第25期9卷 7579-7587页

作者： Jin kyung An Jeong Joo Woo Eun kyung Kim hee Yong Kwak Department of Radiology Nowon Eulji Medical CenterEulji University School of MedicineSeoul 01830South Korea Department of Pathology Nowon Eulji Medical CenterEulji University School of MedicineSeoul 01830South Korea Department of Surgery Nowon Eulji Medical CenterEulji University School of MedicineSeoul 01830South Korea

BACKGROUND Breast adenoid cystic carcinoma(AdCC)is a rare invasive carcinoma composed of epithelial and myoepithelial *** adenosis(MGA)is a rare benign proliferative lesion consisting of small,uniform,and round glands formed by a single layer of epithelial cells and basement membrane without a myoepithelial cell *** may progress to atypical MGA and carcinoma arising in *** various invasive carcinomas from MGA,AdCC has been rarely ***,we report a case of AdCC arising in *** SUMMARY A 59-year-old woman was diagnosed with a newly developed density on a routine *** density was similar to or slightly lower than that of the breast *** showed an irregular mass with a slightly higher echo than that of *** resonance imaging showed an irregular mass with a similar T1 signal intensity and a slightly higher T2 signal intensity compared to muscles or the breast *** lesion showed heterogeneous internal enhancement with an initially slow and delayed persistent enhancing ***,the tumor was composed of invasive AdCC,in situ AdCC,and *** is composed of basaloid and ductal epithelial cells forming cribriform or solid sheets,or haphazardly scattered small cribriform or tubular *** showed small glands with a single epithelial lining and retained lumen.S-100 staining was strongly positive in MGA *** patient underwent breast-conserving surgery with sentinel lymph node *** Breast AdCC arising in MGA showed unique imaging findings that was different from usual invasive cancer.

关键词： Breast neoplasms Fibrocystic breast disease Carcinoma Adenoid cystic Case report

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