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Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators

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Light(Science & Applications) 2020年第1期9卷 530-538页

作者： Sangeun cho Sungwoo Kim Jongmin Kim Yongcheol Jo Ilhwan Ryu Seongsu Hong Jae-Joon Lee SeungNam Cha eun BiNam Sang Uck Lee Sam Kyu Noh Hyungsang Kim Jungwon Kwak Hyunsik Im Division of Physics and Semiconductor Science Dongguk UniversitySeoul 04620Republic of Korea Department of Radiation Oncology Asan Medical CenterSeoul 05505Republic of Korea Department of Energy and Materials Engineering Dongguk UniversitySeoul 04620Republic of Korea Department of Physics Sungkyunkwan UniversitySuwon 2066Republic of Korea Department of Bionano Technology and Department of Applied Chemistry Hanyang UniversityAnsan 15588Republic of Korea

Compared with solid scintillators,liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light ***,we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA_(3)(A:Cl,Br,I)nanocrystals(NCs)with organic molecules(2,5-diphenyloxazole).The hybrid liquid scintillators,compared to state-of-the-art CsI and Gd_(2)O_(2)S,demonstrate markedly highly competitive radioluminescence quantum yields under X-ray irradiation typically employed in diagnosis and *** and theoretical analyses suggest that the enhanced quantum yield is associated with X-ray photon-induced charge transfer from the organic molecules to the ***-resolution X-ray imaging is demonstrated using a hybrid CsPbBr_(3) NC-based liquid *** novel X-ray scintillation mechanism in our hybrid scintillators could be extended to enhance the quantum yield of various types of scintillators,enabling low-dose radiation detection in various fields,including fundamental science and imaging.

关键词： perovskite liquid typically

Foldable and washable textile-based OLEDs with a multi-functional near-room-temperature encapsulation layer for smart e-textiles

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npj Flexible Electronics 2021年第1期5卷 123-131页

作者： So Yeong Jeong Hye Rin Shim Yunha Na Ki Suk Kang Yongmin Jeon Seungyeop choi eun Gyo Jeong Yong Cheon Park Ha-eun cho Junwoo Lee Jeong Hyun Kwon Sung Gap Im Kyung Cheol choi School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea Department of Clothing and Textiles Chonnam National UniversityGwangjuRepublic of Korea Department of Display and Semiconductor Engineering Sun Moon UniversityAsanRepublic of Korea Department of Chemical and Biomolecular Engineering and KI for the NanoCentury Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea.

Wearable electronic devices are being developed because of their wide potential applications and user *** them,wearable organic light emitting diodes(OLEDs)play an important role in visualizing the data signal processed in wearable electronics to *** this study,textile-based OLEDs were fabricated and their practical utility was *** textilebased OLEDs exhibited a stable operating lifetime under ambient conditions,enough mechanical durability to endure the deformation by the movement of humans,and washability for maintaining its optoelectronic properties even in water condition such as rain,sweat,or *** this study,the main technology used to realize this textile-based OLED was multi-functional nearroom-temperature *** outstanding impermeability of TiO_(2)film deposited at near-room-temperature was *** internal residual stress in the encapsulation layer was controlled,and the device was capped by highly crosslinked hydrophobic polymer film,providing a highly impermeable,mechanically flexible,and waterproof encapsulation.

关键词： OLEDs layer film

On-screen fingerprint sensor with optically and electrically tailored transparent electrode patterns for use on high-resolution mobile displays

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Microsystems & Nanoengineering 2020年第1期6卷 243-254页

作者： Hyun-Joon Kim-Lee Seog Woo Hong Dong Kyun Kim Jinmyoung Kim Hong Suk Kim Seok-Whan Chung eun-Hyoung cho Hae-Sung Kim Byung-Kyu Lee Device Research Center Samsung Advanced Institute of Technology130 Samsung-roYeongtong-guSuwon-siGyeonggi-do 443-803Republic of Korea

In this study,a mutual capacitive-type on-screen fingerprint sensor,which can recognize fingerprints on a display screen to provide smartphones with full-screen displays with a minimal bezel area,is ***-screen fingerprint sensors are fabricated using an indium tin oxide transparent conductor with a sheet resistance of~10Ω/*** a transmittance of~94%(~86% with the substrate effect)in the visible wavelength range,and assembled onto a display *** at this high transmittance,the electrodes can degrade the display quality when they are placed on the *** interference between periodic display pixel arrays and sensor patterns can lead to the *** is necessary to find an appropriate sensor pattern that minimizes the Moirepattern,while maintaining the signal *** search for appropriate patterns,a numerical calculation is carried out over wide ranges of pitches and rotation *** range is narrowed for an experimental evaluation,which is used to finally determine the sensor *** the selected sensor pitches are too small to detect capacitance variations,three unit patterns are electrically connected to obtain a unit block generating a larger *** applying the selected sensor pattern and circuit driving by block,fingerprint sensing on a display is demonstrated with a prototype built on a commercial smartphone.

关键词： transparent pattern smart

Relationship between physicochemical characteristics of Korean wheat flour and quality attributes of steamed bread

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Journal of Integrative Agriculture 2019年第11期18卷 2652-2663页

作者： Ji-eun Kim Byung-Kee Baik Chul Soo Park Jae-Han Son Chang-Hyun choi Youngjun Mo Tae-Il Park chon-Sik Kang Seong-Woo cho Department of Crop Science&Biotechnology Chonbuk National UniversityJeonju 54896Korea USDA-ARS CSWQRU Soft Wheat Quality LaboratoryWoosterOH 44691USA National Institute of Crop Science Rural Development AdministrationWanju 55365Korea

The purpose of this study is to identify major factors affecting the manufacture and quality of steamed bread,consumed in Southeast Asia including China,Japan,and ***,flours of 11 Korean wheat cultivars were used to evaluate quality attributes of two different styles of steamed bread,Korean style steamed bread(KSSB)and northern-style Chinese steamed bread(NSCSB).KSSB prepared more ingredients and higher optimum water absorption of dough than NSCSB because Korean consumers prefer white and glossy surface and soft *** showed lower height,larger diameter and volume of steamed bread,higher stress relaxation,and softer texture of crumb than *** correlation between flour characteristics and quality of steamed bread was different in KSSB and *** 90%of variability in the height and volume of KSSB could be predicted from protein content,mixing tolerance of Mixograph,average particle size of flour,final viscosity and solvent retention *** content and quality parameters also could explain the variation of steamed bread height in *** wheat carrying Glu-A3c allele produced higher volume of steamed bread(704.7 mL)than Glu-A3d allele(645.8 mL)in KSSB,although there was no significant difference in volume of NSCSB by glutenin ***-D1d and Glu-A3c alleles had softer texture of crumb than Glu-D1f and Glu-A3d alleles in KSSB,Glu-B3i allele also showed lower hardness of crumb than their counterpart allele in *** wheat showed higher height and volume of steamed bread,and lower stress relaxation and hardness of crumb than soft wheat in KSSB.

关键词： steamed bread quality wheat flour evaluation

Gut microbiome composition can predict the response to nivolumab in advanced hepatocellular carcinoma patients

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World Journal of Gastroenterology 2021年第42期27卷 7340-7349页

作者： Min-Woo Chung Moon-Ju Kim eun Jeong Won Yu Jeong Lee Yong-Woon Yun Sung Bum cho Young-eun Joo Jun-Eul Hwang Woo Kyun Bae Ik-Joo Chung Myung Geun Shin Jong Hee Shin Department of Internal Medicine Chonnam National University Hospital and College of MedicineHwasun 58128Jeollanam-doSouth Korea Department of Parasitology and Tropical Medicine Chonnam National University Medical SchoolHwasun 58128Jeollanam-doSouth Korea Department of Laboratory Medicine Chonnam National University Hwasun HospitalHwasun 58128Jeollanam-doSouth Korea Department of Preventive Medicine Chonnam National University Medical SchoolHwasun-eupHwasun 58128Jeollanam-doSouth Korea Department of Laboratory Medicine Chonnam National University HospitalGwangju 61469South Korea

BACKGROUND Immunotherapy has revolutionized the clinical outcomes of intractable cancer *** is known about the intestinal nonpathogenic bacterial composition of hepatocellular carcinoma(HCC)patients treated by *** To determine whether there is a correlation between gut bacterial composition and prognosis in HCC *** From September 2019 to March 2020,we prospectively collected fecal samples and examined the gut microbiome of 8 advanced HCC patients treated with nivolumab as a second-or third-line systemic *** samples were collected before the start of *** samples of patients with progression during treatment were collected at the time of progression,and fecal samples of patients who showed good response to nivolumab were collected after 5-7 mo as *** data from 16S ribosomal RNA sequencing were analyzed using CLC Genomics *** data were analyzed according to therapeutic *** All 8 patients were male,of which 6 had underlying chronic hepatitis B.A higher Shannon index was found in the responders than in the non-responders after nivolumab therapy(P=0.036).The unweighted beta diversity analysis also showed that the overall bacterial community structure and phylogenetic diversity were clearly distinguished according to therapeutic *** was no significant difference in the diversity or composition of the patient gut microbiome according to the immunotherapy *** taxa specific to therapeutic response were designated as follows:Dialister pneumosintes,Escherichia coli,Lactobacillus reteri,Streptococcus mutans,Enterococcus faecium,Streptococcus gordonii,Veillonella atypica,Granulicatella sp.,and Trchuris trichiura for the nonresponders;Citrobacter freundii,Azospirillum *** Enterococcus durans for the *** note,a skewed Firmicutes/Bacteroidetes ratio and a low Prevotella/Bacteroides ratio can serve as predictive markers of non-response,wh

关键词： Microbiome Nivolumab Firmicutes/Bacteroidetes ratio Prevotella/Bacteroides ratio Hepatocellular carcinoma Prognosis

Anti-quorum sensing and anti-biofilm formation activities of plant extracts from South Korea

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Asian Pacific Journal of Tropical Biomedicine 2018年第8期8卷 411-417页

作者： Okhee choi Dong-Wan Kang Su Kyung cho Yeyeong Lee Byeongsam Kang Juyoung Bae Seunghoe Kim Jeong Hoon Lee Seung eun Lee Jinwoo Kim Institute of Agriculture & Life Science Gyeongsang National University Gyeonsangnam-do Agriculture Extension Services Department of Plant Medicine Gyeongsang National University Division of Applied Life Science Gyeongsang National University National Institute of Horticultural and Herbal Science Rural Development Administration

Objective: To investigate anti-quorum sensing(anti-QS) and anti-biofilm formation(antiBF) activities of the ethanol extracts of 388 plants. Methods: The anti-QS activity of the plant extracts was evaluated by disc-diffusion assays using the bio-reporter strain, Chromobacterium violaceum CV017. Pseudomonas aeruginosa PAO1, Yersinia enterocolitica ATCC 9610, and Agrobacterium tumefaciens C58, which possess QS systems, were used to evaluate the antiBF activity of the plant extracts. Results: Among 388 plant extracts, the Cornus controversa(C. controversa) and Cynanchum wilfordii extracts exhibited the strongest anti-QS activity. The C. controversa extract exhibited anti-BF activity against Pseudomonas aeruginosa, Yersinia enterocolitica and Agrobacterium tumefaciens, whereas the Cynanchum wilfordii extract exhibited no anti-BF activity against Pseudomonas aeruginosa. In addition, the C. controversa extract suppressed soft rot of cabbage. Conclusions: The C. controversa extract inhibits bacterial QS and BF, and is capable of controlling soft rot. Therefore, this extract has potential for the prevention and treatment of bacterial infections and for the development of alternatives to antibiotics.

关键词： Plant extracts Quorum sensing Biofilm formation Cornus controversa

An Evaluation of the Machinability of Nitinol SMA Using Combined Process of EP and MR Polishing

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Journal of Iron and Steel Research(International) 2012年第S2期19卷 629-632页

作者： HA Seok-Jae SHIN Bong-Cheol cho Myeong-Woo LEE eun-Sang choI Seung-Bok Department of Mechanical Engineering Inha University Samsung Electro-Mechanics

Nitinol,a shape memory alloy(SMA),is manufactured from titanium and *** is employed in various fields for use in devices such as micro sensors,ultra-precision devices and satellite *** is highly recommended as a material in medical stents for insertion into the body because it has excellent organic ***,because they are intended to be inserted into the human body,products such as medical stents require a high-quality *** nitinol has more of the characteristics of titanium than of nickel,one of its drawbacks is that heat generated in nitinol during machining is not discharged smoothly,leading to areas of inner stress which occur when traditional machining methods are *** overcome this difficulty,various non-traditional machining methods,including non-contact machining,have been investigated for use with *** study is focused on the application of an effective fabrication method that combines electrolytic polishing(EP)and MR polishing to improve the surface integrity of nitinol through a series of *** roughness variations of the polished nitinol were investigated by changing the imposed polishing conditions of EP and MR polishing,***,the variations in the surface roughness were observed with polished previously performed via the EP process.

关键词： electrolytic polishing(EP) magnetorheological(MR)fluids Ni-Ti alloy shape memory alloy(SMA) surface roughness

Characteristics of Micro Electrochemical Polishing to Improve the Surface Quality of the Stainless Steel Tube

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Journal of Iron and Steel Research(International) 2012年第S2期19卷 1137-1140页

作者： Seung-Gun choi Sung-Hyun Kim eun-Sang Lee Seung-Bok choi Myeong-woo cho School of Mechanical Engineering Inha University Department of Mechanical Engineering Inha University

Electrochemical polishing is the anodic dissolution process without contact with tools,is a surface treatment method to make a surface planarization using an electrochemical reaction with low applied *** surface quality is mainly affected by the many process *** improve the surface quality,the control of parameters is very *** aim of this study is to investigate the characteristic of electrochemical polishing effect for inner diameter of Stainless Steel *** order to analyze the characteristics of surface quality were measured in terms of temperature, applied current and machining *** investigation can enhance the surface quality of inner diameter Stainless Steel ***,we have verified improved results by using selected optimal conditions.

关键词： Electrochemical polishing surface quality applied current

Undifferentiated embryonal sarcoma of the liver presenting as a hemorrhagic cystic tumor in an adult

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Hepatobiliary & Pancreatic Diseases International 2011年第6期10卷 657-660页

作者： Ho Hyun Kim Jung Chul Kim eun Kyu Park Young Hoe Hur Yang Seok Koh chol Kyoon cho Hyung Seok Kim Hyun Jong Kim Department of Surgery chonnam National University Medical School GwangjuKorea Department of Pathology chonnam National University Medical School GwangjuKorea

BACKGROUND:Undifferentiated embryonal sarcoma (UES) of the liver is a rare,highly malignant neoplasm with a poor prognosis occurring almost exclusively in late childhood (6-10 years of age).Only a few cases have been reported in adults accounting for less than 1% of all primary liver ***:A 47-year-old woman presented with a palpable mass in the left upper *** resonance imaging revealed a 12×10 cm cystic mass with hemorrhage in the left lateral segment of the *** initial impression was a hemorrhagic cystic tumor of the *** patient underwent a left lateral sectionectomy of the *** and immunohistochemistry helped make a diagnosis of ***:The patient recovered uneventfully and received systemic *** examination for follow-up revealed a metastatic lesion in the lumbar spine (L5).She was subjected to radiotherapy at the lumbar *** survived 48 ***:Although hepatic cyst as UES of the liver is difficult to diagnose because of its rarity in adults and lack of specific findings,it should be considered in a differential diagnosis.

关键词： embryonal sarcoma liver neoplasms cyst adult