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Microstructure investigation and multicolor upconversion in Yb3+/Ln3+(Ln=Er/Tm/ho) ions doped α-Sialon

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Progress in Natural Science:Materials International 2019年第5期29卷 549-555页

作者： Sang hoon Jeong Yuwaraj K.Kshetri seung ho kim Sung Hun Cho Soo W.Lee Department of Environment and Bio-Chemical Engineering Sun Moon University Research Center for Eco Multi-Functional Nano Materials Sun Moon University The Institute of Scientific and Industrial Research (ISIR) Osaka University

Yb3+/Ln3+(Ln=Er/Tm/ho)-α-sialon ceramics were fabricated by hot press sintering *** microstructure and luminescent properties were studied by XRD,EDS,HRTEM and photoluminescence *** results showed that the sintered ceramics consisted ofα-Sialon with a trace amount ofβ-Sialon *** frequency upconversion and downconversion properties of Yb3+/Ln3+(Ln=Er/Tm/ho)-α-Sialon ceramics were investigated under 980 nm low-power *** different concentrations of Yb3+/Ln3+(Ln=Er/Tm/ho)produced multicolor emissions characteristics of each Ln3+ion as a result of the energy transfer from Yb3+to Er3+,Tm3+and ho3+*** EDS spectra measurements and mappings showed that the Ln3+ions were well incorporated in theα-Sialon *** evolution of the emission decay behavior has been investigated to understand the energy transfer mechanism.

关键词： α-Sialon hot press sintering Upconversion Energy transfer

Long cycle-life aqueous Zn battery enabled by facile carbon nanotube coating on Cu current collector

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Carbon Energy 2024年第6期6卷 151-164页

作者： Beom-Keun Cho Sung-ho Huh So Hee kim seungho Yu Jong-Seong Bae Jung-Keun Yoo seung-ho Yu Department of Chemical and Biological Engineering Korea UniversitySeoulRepublic of Korea Advanced Analysis Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea Energy Storage Research Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea KIST School Division of Energy and Environment TechnologyKorea University of Science and TechnologySeoulRepublic of Korea Busan Center Korea Basic Science Institute(KBSI)BusanRepublic of Korea Carbon Composites Department Composites Research DivisionKorea Institute of Materials Science(KIMS)ChangwonRepublic of Korea

As an alternative to Li-ion batteries,aqueous Zn batteries have gained attention due to the abundance of Zn metal,low reduction potential(-0.76 V *** hydrogen electrode),and high theoretical capacity(820 mAh g^(-1))of multivalent Zn2+***,the growth of Zn dendrites and the formation of irreversible surface reaction byproducts pose challenges for ensuring a long battery lifespan and ***,the Cu foil coated with a single-walled carbon nanotube(SWCNT)layer using a facile doctor blade casting method is *** SWCNT-coated Cu foil demonstrates a significantly longer battery lifespan compared to the bare Cu in the half-cell *** operando optical microscopy imaging,we are able to provide intuitive evidence that Zn deposition occurs between the carbon nanotube(CNT)coating and Cu substrate,in agreement with the computational ***,with various imaging techniques,the flat morphology and homogeneous distribution of Zn beneath the SWCNT layer are *** addition,the full-cell using CNT-coated Cu exhibits a long cycle life compared to the control group,thereby demonstrating improved electrochemical performance with limited Zn for the cycling process.

关键词： aqueous Zn battery carbon nanotube operando imaging surface coating

Mass-forming ischemic colitis that mimics colon cancer

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Chinese Medical Journal 2020年第10期133卷 1253-1254页

作者： ho seung kim Fozan Sauri Jae Hyun Kang Nam Kyu kim Division of Colorectal Surgery Department of SurgerySeverance HospitalYonsei University College of MedicineSeoul 03722Korea.

To the Editor:Rarely,ischemic colitis can also mimic a carcinoma during colonoscopy and on computed tomography(CT)*** colonoscopy,an ulceration,a submucosal mass,and a narrowed colon segment with an ulcerated mucosa have all been described as mimicking this kind of *** reports have documented this type of mass-forming ischemic colitis variant.[1-4]Here,we described two patients with ischemic colitis who presented with lesions mimicking colon cancer.

关键词： colon cancer. colitis

Assessment and management of low anterior resection syndrome after sphincter preserving surgery for rectal cancer

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Chinese Medical Journal 2020年第15期133卷 1824-1833页

作者： Ahmad Sakr Fozan Sauri Mohammed Alessa Eman Zakarnah homoud Alawfi Radwan Torky ho seung kim seung Yoon Yang Nam Kyu kim Division of Colorectal Surgery Department of SurgerySeverance HospitalYonsei University College of MedicineSeoul 03722Korea Colorectal Surgery Unit Department of General SurgeryMansoura Faculty of MedicineMansoura University HospitalsMansoura 35511Egypt ‘Department of General Surgery King Faisal UniversityAlahsa 31982Saudi Arabia Department of General Surgery Main hospitalAssiut Faculty of MedicineAssiut UniversityAssiut 71511Egypt

Many patients develop a variety of bowel dysfunction after sphincter preserving surgeries(SPS)for rectal *** bowel dysfunction usually manifests in the form of low anterior resection syndrome(LARS),which has a negative impact on the patients'quality of *** study reviewed the LARS after SPS,its mechanism,risk factors,diagnosis,prevention,and treatment based on previously published *** history taking,physical examination of the patients,using validated questionnaires and other diagnostic tools are important for assessment of LARS *** of LARS should be tailored to each *** therapy is usually needed for patients with major LARS with acceptable *** treatment includes conservative management in the form of medical,pelvic floor rehabilitation and transanal irrigation and invasive procedures including *** this treatment failed,fecal diversion may be *** conclusion,Initial meticulous dissection with preservation of nerves and creation of a neorectal reservoir during anastomosis and proper Kegel exercise of the anal sphincter can minimize the occurrence of ***-treatment counseling is an essential step for patients who have risk factors for developing LARS.

关键词： Bowel dysfunction Low anterior resection syndrome Rectal cancer Sphincter-preserving surgery

Electrochemical biosensors for point-of-care testing

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Bio-Design and Manufacturing 2024年第4期7卷 548-565页

作者： Jinsol kim Juho Jeong seung Hwan Ko Department of Mechanical Engineering Seoul National UniversitySeoul 08826Republic of Korea Institute of Advanced Machinery and Design(SNU-IAMD) Seoul National UniversitySeoul 08826Republic of Korea

Point-of-care testing(POCT)is the practice of diagnosing and monitoring diseases where the patient is located,as opposed to traditional treatment conducted solely in a medical laboratory or other clinical *** has been less common in the recent past due to a lack of portable medical devices capable of facilitating effective medical ***,recent growth has occurred in this field due to advances in diagnostic technologies,device miniaturization,and progress in wearable *** these developments,electrochemical sensors have attracted interest in the POCT field due to their high sensitivity,compact size,and *** are used in various applications,from disease diagnosis to health status *** this paper we explore recent advancements in electrochemical sensors,the methods of fabricating them,and the various types of sensing mechanisms that can be ***,we delve into methods for immobilizing specific biorecognition elements,including enzymes,antibodies,and aptamers,onto electrode surfaces and how these sensors are used in real-world POCT settings.

关键词： Point-of-care testing(POCT) Electrochemical sensor Enzyme Antibody Health care

NIR emissive Ru(Ⅱ)metallacycle as a sonosensitizer/sonocatalyst assisting in vivo bacterial diagnosis and eradicating multidrug-resistant biofilms

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Science China Chemistry 2024年第9期67卷 2785-2786页

作者： Chonglu Li Qihang Ding Jong seung kim School of Medicine Wuhan University of Science and TechnologyWuhan 430065China Department of Chemistry Korea UniversitySeoul 02841Republic of Korea

Microbial biofilm-related infections present a significant global health challenge,posing a major threat to public health systems[1].Biofilms,complex structures formed by the aggregation of microorganisms,are commonly found on medical devices,human tissue surfaces,and in natural environments[2].These biofilms exhibit high levels of antibiotic resistance and survival stability,rendering traditional antibiotic treatments ineffective in eradicating infections[3].

关键词： diagnosis dic rendering

Triple synchronous primary neoplasms in the gastrointestinal tract

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Chinese Medical Journal 2021年第10期134卷 1233-1235页

作者： Fozan Mohammed Sauri Eman Adnan Zakarneh Mohammed Yousef Alessa Ahmad Hammad Sakr Yeon seung Chung ho seung kim Nam kyu kim Department of Surgery Colorectal DivisionYonsei University College of MedicineSeoul120-752South Korea Department of General Surgery King Faisal UniversityAlahsa 31982Saudi Arabia Colorectal Surgery Unit Department of General SurgeryMansoura Faculty of MedicineMansoura University HospitalMansoura 35511Egypt Department of Pathology Yonsei University College of MedicineSeoul 120-752South Korea

To the Editor:Most of the multiple primary malignancies are metachronous or involve more than one system,we instead describe a case with synchronous triple cancers involving one organ *** study was approved by the Institutional Review Board of Severance hospital,Yonsei University(IRB No.4-2019-0889).A 61-year old man who had no chronic illness,underwent abdominal computerized tomography(CT)scan due to vague abdominal complains and was found to have descending colon wall thickening[Figure 1A],colon cancer(cT3N+)was *** is not smoker or alcohol drunker,and has no family history of malignancies.

关键词： neoplasms colon Figure

MXene-based hybrid materials for electrochemical and photoelectrochemical H_(2) generation

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Journal of Energy Chemistry 2024年第6期93卷 111-125,I0004页

作者： Jun Young kim seung Hun Roh Chengkai Xia Uk Sim Jung Kyu kim School of Material Science and Engineering North University of ChinaTaiyuan 030051China School of Chemical Engineering Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwon 16419Republic of Korea Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology(KENTECH)NajuJeollanamdo 58330Republic of Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwon 16419Republic of Korea

The conversion of solar energy to produce clean hydrogen fuel through water splitting is an emerging strategy for efficiently storing solar energy in the form of solar *** aligns with the increasing global demand for the development of an ideal energy alternative to fossil fuels that does not emit greenhouse ***(EC) and photoelectrochemical(PEC) water splitting technologies have garnered significant attention worldwide for advanced hydrogen solar fuel production in recent *** achieve sustainable green H_(2) production,it is essential to create efficient catalyst materials that are low-cost and can replace expensive noble metal-based *** characteristics make them an ideal catalyst material for the ***-dimensional MXenes with M_(n+1)X_(n) structure have been identified as a promising option for EC and PEC water splitting due to their superior hydrophilicity,metal-like conductivity,large surface area,and adjustable surface ***,we present a summary of recent advancements in the synthesis and performance enhancement methods for MXene hybrid materials in hydrogen production through EC and PEC water ***,we examine the challenges and insights associated with the rational design of MXene-based hybrid materials to facilitate efficient water splitting for sustainable solar fuel production.

关键词： MXene Hybrid materials EC PEC HER OER Water splitting

Retinal artery/arteriole occlusion risks after endovascular treatment for unruptured intracranial aneurysm

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Stroke & Vascular Neurology 2024年第3期9卷 295-305,I0251-I0263页

作者： Hae Rang kim Min Jeoung kim Sunyeup kim Myung Soo Chang Dong Joon kim Byung Moon kim Keun Young Park Yong Bae kim Christopher seungkyu Lee Suk ho Byeon Sung Soo kim seung Won Lee Yong Joon kim Department of Ophthalmology CHA Bundang Medical CenterCHA University College of MedicineSeongnamKorea(the Republic of) Department of Neurosurgery Severance Stroke CenterSeverance HospitalYonsei University College of MedicineSeoulKorea(the Republic of) Department of Neurosurgery Uijeongbu St.Mary’s HospitalThe Catholic University of Korea College of MedicineUijeongbuKorea(the Republic of) Department of Medical AI Sungkyunkwan University School of MedicineSuwonKorea(the Republic of) Department of Ophthalmology Institute of Vision ResearchYonsei University College of MedicineSeoulKorea(the Republic of) Department of Radiology Severance Stroke CenterSeverance HospitalYonsei University College of MedicineSeoulKorea(the Republic of) Department of Precision Medicine Sungkyunkwan University School of MedicineSuwonKorea(the Republic of)

Background To evaluate the association between retinal artery/arteriole occlusion(RAO)and unruptured intracranial aneurysm(UIA).Methods Incident UIA patients from a nationwide cohort(n=253240)were categorised into three groups based on subsequent treatment:observation(n=208993),microsurgical clipping(n=14168)and endovascular treatment(EVT)groups(n=30079).The incidence and the incident time of RAO were *** of RAO and associated risk factors were ***,a hospital cohort comprising 2569 consecutive UIA patients treated at a tertiary hospital was analysed with detailed clinical information of *** In the nationwide cohort analysis,the incidence of RAO was significantly higher in EVT group than in observation and clipping groups,especially within 60 days(early RAO(within 60 days):HR=4.00,95%CI:2.44 to 6.56);delayed RAO(after 60 days:HR=1.74,95%CI:1.13 to 2.68).Multivariable analysis showed that the presence of chronic kidney disease(p=0.009)and use of a balloon microcatheter during the procedure(p=0.013)were associated with a higher risk of *** hospital cohort analysis,11(0.8%)cases of RAO occurred after EVT,whereas none occurred after microsurgical clipping(phould be taken when treating paraclinoid aneurysms with balloon microcatheters.

关键词： treatment nationwide balloon