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Curved copper nanowires-based robust flexible transparent electrodes via all-solution approach

Nano Research 2017年第9期10卷 3077-3091页

作者： Zhenxing Yin Seung Keun Song Sanghun Cho Duck-Jae You Jeeyoung Yoo Suk Tai Chang youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea School of Chemical Engineering and Materials Science Chung-Ang University Seou106974 Republic of Korea Advanced Institutes of Convergence Technology 145 Gwanggyo-ro Yeongtong-gu Suwon-si Gyeonggi-do 16229 Republic of Korea

Curved Cu nanowire (CCN)-based high-performance flexible transparent conductive electrodes (FTCEs) were fabricated via a fully solution-processed approach, involving synthesis, coating, patterning, welding, and transfer. Each step involved an innovative technique for completing the all-solution processes. The high-quality and well-dispersed CCNs were synthesized using a multi-polyol method through the synergistic effect of specific polyol reduction. To precisely control the optoelectrical properties of the FTCEs, the CCNs were uniformly coated on a polyimide (PI) substrate via a simple meniscus-dragging deposition method by tuning several coating parameters. We also employed a polyurethane (PU)-stamped patterning method to effectively produce 20 μm patterns on CCN thin films. The CCN thin films exhibited high electrical performance, which is attributed to the deeply percolated CCN network formed via a solvent-dipped welding method. Finally, the CCN thin films on the PI substrate were partially embedded and transferred to the PU matrix to reduce their surface roughness. Through consecutive processes involving the proposed methods, a highly percolated CCN thin film on the PU matrix exhibited high optoelectrical performance (R s = 53.48 Ω/□ at T = 85.71%), excellent mechanical properties (R/R 0 < 1.10 after the 10th repetition of tape peeling or 1,000 bending cycles), and a low root-mean-square surface roughness (R rms = 14.36 nm).

关键词： curved Cu nanowires all-solution processes 20 μm patterns high performance transparent electrode

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Biopeptides of Pyropia yezoensis and their potential health benefits: A review

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Asian Pacific Journal of Tropical Biomedicine 2021年第9期11卷 375-384页

作者： Sivakumar Allur Subramaniyan Naziya Begum Sung Jae Kim youn Hee Choi Taek-Jeong Nam Institute of Fisheries Sciences Pukyong National UniversityBusan 46041South Korea Department of Chemistry College of Natural and computational sciencesDebre Berhan UniversityDebye BerhanP.O.Box-445 Ethiopia Department of Orthopaedic Surgery Dongtan Sacred Heart HospitalHallym University College of MedicineHwaseongRepublic of Korea Department of Marine Bio-Materials&Aquaculture Pukyong National UniversityBusan 48513South Korea

Pyropia yezoensis(***)is a popular species of red algae that are commercially cultivated and consumed in East Asia,China,Japan,and *** high protein content of *** provides a source of multiple bioactive peptides exhibiting antioxidant,anti-inflammatory,antihypertensive,anticancer,tissue healing,immunomodulatory,and anticoagulant ***,many other biologically active substances in ***,including carbohydrates,lipids,dietary fibers,and polyphenols,have shown potential health benefits and are important in both the food and agriculture *** review provides a detailed summary of researches over the last decade on the biological and medicinal properties of bioactive *** information was extracted from various electronic resources,including Google Scholar,PubMed,MEDLINE,and Google Patents.

关键词： Red algae Pyropia Bioactive peptides Human health

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Analysis of apigenin in <i>Blumea balsamifera</i>Linn DC. and its inhibitory activity against aldose reductase in rat lens

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Journal of Agricultural Chemistry and Environment 2012年第1期1卷 28-33页

作者： Dong Gu Lee So-youn Mok Changsun Choi Eun Ju Cho hyun young Kim Sanghyun Lee Department of Food and Nutrition Chung-Ang University Anseong South Korea Department of Food Science and Nutrition Pusan National University Busan South Korea Department of Food Science Gyeongnam National University of Science and Technology Jinju South Korea Department of Integrative Plant Science Chung-Ang University Anseong South Korea

To investigate the therapeutic potentials of na- tural sources, stepwise polarity fractions of Blumea balsamifera were tested for their ability to inhibit aldose reductase (AR) activity in rat lenses. Of these, the ethyl acetate (EtOAc) fraction exhibited a unique AR inhibitory activity (IC50 value, 0.11 μg/mL). Apigenin was identified from the active EtOAc fraction and exhibited high AR inhibitory activity (IC50 value, 4.03 μM). The content of apigenin was measured in B. balsamifera (0.47 mg/g) by HPLC/UV analysis. Our result suggests that B. balsamifera could be a useful natural source for the development of a novel AR inhibitory agent against diabetic complications.

关键词： Blumea balsamifera Apigenin Aldose Reductase Inhibition HPLC

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High-performance solid-solution potassium-ion intercalation mechanism of multilayered turbostratic graphene nanosheets

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Journal of Energy Chemistry 2022年第4期31卷 814-823页

作者： jiae Um Seung Uk Yoon Hoseong Kim Beom Sik youn Hyoung-Joon jin hyung-Kyu Lim young Soo Yun Program in Environmental and Polymer Engineering Inha Universityncheon 22212 South Korea Department of Polymer Science and Engineering Inha UniversityIncheon 22212South Korea Division of Chemical Engineering and Bioengineering Kangwon National University Chuncheon Gangwon-do 24341 South Korea KU-KIST Graduate School of Converging Science and Technologyea University 145 Anam-roSeongbuk-guSoul02841 South Korea Department of Integrative Energy Engineering 145 Anam-roSongbuk-guKorea UniversitySeoul 02841 South Korea

The solid-solution reaction between an alkali cation and an active host material is known as a singlephase redox mechanism,and it is typically accompanied by a continuous voltage *** is distinct from the typical alkali cation intercalation reaction at an equivalent site of the active host material,which exhibits a voltage ***,we report an unusual solid-solution potassium-ion intercalation mechanism with a low-voltage plateau capacity on multilayered turbostratic graphene nanosheets(T-GNSs).Despite the disordered graphitic structure with a broad range of d-spacings(3.65–4.18À),the T-GNSs showed a reversible plateau capacity of~200 m A h g^(-1),which is higher than that of a well-ordered graphite nanoplate(~120 m A h g^(-1)).In addition,a sloping capacity of~220 m A h g^(-1)was delivered with the plateau capacity,and higher rate capabilities,better reversibility,and a more stable cycling performance were confirmed on the turbostratic ***-principles calculations suggest that the multitudinous lattice domains of the T-GNSs contain diverse intercalation sites with strong binding energies,which could be the origin of the high-performance solid-solution potassium-ion intercalation behavior when the turbostratic graphene stacks have a d-spacing smaller than that of equilibrium potassium–graphite intercalation compounds(5.35À).

关键词： Turbostratic graphite Graphene nanosheet Defective carbon Anode Potassium-ion batteries

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Effects of Stress, Depression, and Problem Drinking on Suicidal Ideation among Korean Workers

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International Journal of Mental Health Promotion 2021年第2期23卷 189-199页

作者： Yun-Jung Choi Mi-ra Won youn-Joo Um Red Cross College of Nursing Chung-Ang UniversitySeoulKorea Department of Nursing Daewon University CollegeJecheonKorea Graduate School of Nursing Chung-Ang UniversitySeoulKorea

The mental health of workers is an important issue that affects not only individuals and their families but also workplaces and ***,it is necessary to regularly evaluate and analyze workers’mental health status,including levels of stress,depression,and addictive behaviors to apply thesefindings in creating mental health promotion *** study aims to provide basic data that would facilitate early intervention for workers’mental health problems by analyzing factors such as stress,depression,and problem drinking that can affect suicidal *** April 15 to October 25,2019,a survey was conducted with 165 workers across six workplaces in a Korean *** was performed using descriptive statistics,correlation,and simple and multiple regression analyses using the R statistics program *** was no difference in suicidal ideation scores based on the participants’general characteristics,while there was a significant positive correlation among stress,depression,problem drinking,and suicidal *** addition,severe depression,severe stress,and severe problem drinking had significant effects on suicidal ideation,and among the subitems of stress,somatic symptoms had an effect on suicidal *** addition,severe stress,somatic symptoms,depression,and severe problem drinking had a significant effect on suicidal ideation in males but not in *** is necessary to identify the effects of stress,depression,drinking problems,and suicide on workers’mental health,and evaluate their mental health systemati-cally and regularly to recognize whether active psychiatric treatment and nursing intervention are necessary as well as preventive *** addition,it is meaningful to pay attention to the suicide ideation of adult workers and provide basic data to promote systematic public health policies on mental health.

关键词： Alcohol depression mental health stress suicidal ideation

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Effects of Chairside Polishing and Brushing on SurfaceRoughness of Acrylic Denture Base Resins

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Journal of Wuhan University of Technology(Materials Science) 2009年第1期24卷 100-105页

作者： Seung-Kyun Kim Ju-Mi Park Min-Ho Lee Jae-youn Jung Shipu Li Xinyu Wang Department of Prosthodontics and Institute of Oral Bioscience School of Dentistry Chonbuk National University Jeonju Republic of Korea Department of Dental Biomaterials and Institute of Oral Bioscience School of Dentistry Chonbuk National University Jeonju Republic of Korea Division of Mechanical & Aerospace System Engineering and RCIT Chonbuk National University Jeonju Republic of Korea Biomedical Materials and Engineering Research Center Wuhan University of Technology Wuhan 430070 China

The effects of 3 chairside polishing kits and mechanical brushing on the surface roughness of 3 different acrylic denture base resins were compared. Acrylic denture base resins （auto-polymerizing, heat-polymerizing, injected heat-polymerizing resins） were examined after a tungsten carbide bur, and after chairside polishing using 3 polishing kits and pumice. The specimens were subjected to mechanical brushing using a wear tester to simulate 30 000 strokes of brushing. The surface roughness of the acrylic denture base resin specimens was measured using a contact pro-filometer. After the test, the random polished acrylic resins were evaluated by scanning electron mi-croscopy （SEM） and atomic force microscopy （AFM）. Acrylic denture base resins polished using the 3 types of polishing kits had a smoother surface than those finished with the tungsten carbide bur （p〈0.05）. The surface of the resin polished by a TC cutter exceeded the Ra of 0.2 μm （p〈0.05）. The auto-polymerizing resin showed a significantly higher surface roughness than the heat-polymerizing resin and injected heat-polymerizing resin （p〉0.05）. In the case of polishing step wise, there was almost no change in surface roughness after brushing （p〉0.05）.

关键词： acrylic denture base resin polishing brushing surface roughness

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Application of Cellulose Nanofibril as a Wet-end Additive in Papermaking:A Brief Review

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Paper And Biomaterials 2020年第2期5卷 76-84页

作者： Guihua Yang Guangrui Ma Ming He Xinxiang ji Hye Jung youn Hak Lae Lee jiachuan Chen State Key Laboratory of Biobased Material and Green Papermaking Qilu University of Technology(Shandong Academy of Sciences)Ji'nanShangdong Province250353China Department of Forest Sciences Research Institute of Agriculture and Life SciencesCollege of Agriculture and Life SciencesSeoul National University1 Gwanak-roGwanak-guSeoul08826South Korea

Recently,cellulose nanofibril(CNF)has emerged as a promising,sustainable reinforcement with outstanding potential in material *** to the properties of CNF,it has been explored in food,cosmetic,and pharmaceutical applications,as well as in industrial applications such as paints,drill muds,packaging,and *** application of CNF in papermaking is expected to be implemented in the near future to broaden the commercial market of *** studies and patents have reported on the manufacturing,properties,and applications of *** present paper focuses on the recent progresses in the application of CNF as a wet-end additive in papermaking.

关键词： cellulose nanofibril papermaking wet-end additive dewatering

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Impacts of tourism and developmental potential of ecotourism in and around the Changbaishan Biosphere Reserve

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Journal of Forestry Research 1998年第3期9卷 211-216页

作者：王宪礼朴正吉 Yeong-HyeonHwang youn-JungCha DepartmentofForestResources

Ecotourism has been suggested as the altemative for the conflicts between tourism development and nature conservation especially for the protected area, such as biosphere reserve. Based on investigation of tourism resources of The Changbaishan Biosphere Reserve (CBR) and tourism impacts on environment, economy and society, the potential of ecotourism development is analyzed in and around CBR. The results showed that the conditions in the study area are suitable for development of ecotourism, which is an effective approach for sustainable development of CBR.

关键词： Ecotourism Tourism impact Biosphere

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Cancer-associated fibroblast-derived secreted phosphoprotein 1 contributes to resistance of hepatocellular carcinoma to sorafenib and lenvatinib

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Cancer Communications 2023年第4期43卷 455-479页

作者： JungWoo Eun Jung Hwan Yoon Hye Ri Ahn Seokhwi Kim young Bae Kim Su Bin Lim Won Park TaeWook Kang Geum Ok Baek Moon Gyeong Yoon Ju A Son ji HyangWeon Soon Sun Kim Hyo Jung Cho Jae youn Cheong Department of Gastroenterology Ajou University School of MedicineSuwonSouth Korea Department of Pathology College of MedicineThe Catholic University of KoreaSeoulSouth Korea Department of Biomedical Sciences AjouUniversity Graduate School of MedicineSuwonSouth Korea Department of Pathology Ajou University School of MedicineSuwonSouth Korea Department of Biochemistry&Molecular Biology Ajou University School of MedicineSuwonSouth Korea The Moagen IncDaejeonSouth Korea

Background:Cancer-associated fibroblasts(CAFs)play an important role in the induction of *** study aimed to clarify the mechanism underlying CAF-mediated resistance to two tyrosine kinase inhibitors(TKIs),sorafenib and lenvatinib,and to identify a novel therapeutic target for overcoming TKI resistance in hepatocellular carcinoma(HCC).Methods:We performed a systematic integrative analysis of publicly available gene expression datasets and whole-transcriptome sequencing data from 9 pairs of CAFs and para-cancer fibroblasts isolated from human HCC and para-tumor tissues,respectively,to identify key molecules that might induce resistance to *** then performed in vitro and in vivo experiments to validate selected targets and related *** associations of plasma secreted phosphoprotein 1(SPP1)expression levels before sorafenib/lenvatinib treatment with progression-free survival(PFS)and overall survival(OS)of 54 patients with advanced HCC were evaluated using Kaplan-Meier and Cox regression ***:Bioinformatic analysis identified CAF-derived SPP1 as a candidate molecule driving TKI ***1 inhibitors reversed CAF-induced TKI resistance in vitro and in ***-derived SPP1 activated rapidly accelerated fibrosarcoma(RAF)/mitogen-activated protein kinase(MAPK)and phosphatidylinositol 3-kinase(PI3K)/protein kinase B(AKT)/mammalian target of rapamycin(mTOR)through the integrin-protein kinase C-alpha(PKCα)signaling pathway and promoted epithelial-to-mesenchymal transition(EMT).A high plasma SPP1 level before TKI treatment was identified as an independent predictor of poor PFS(P=0.026)and OS(P=0.047)in patients with advanced HCC after TKI ***:CAF-derived SPP1 enhances TKI resistance in HCC via bypass activation of oncogenic signals and EMT *** inhibition represents a promising therapeutic strategy against TKI resistance ***,plasma SPP1 level before TKI treatment represents a potential biomar

关键词： drug resistance epithelial-to-mesenchymal transition hepatocellular carcinoma secreted phosphoprotein 1

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Significant enhancement of photoresponsive characteristics and mobility of MoS2-based transistors through hybridization with perovskite CsPbBr3 quantum dots

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Nano Research 2019年第2期12卷 405-412页

作者： Taeho Noh Heung Seob Shin Changwon Seo Jun young Kim Jongwon youn Jeongyong Kim Kwang-Sup Lee jinsoo Joo Department of Physics Korea University Seoul 02841 Republic of Korea Department of Advanced Materials and Chemical Engineering Hannatn University Daejeon 34430 Republic of Korea Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea

Inorganic perovskite CsPbBr3 quantum dots (QDs) are potential nanoscale photosensitizers;moreover,two-dimensional (2-D) molybdenum disulfide (MoS2) has been intensively studied for application in the active layers of optoelectronic *** this study,heterostructures of 2D-monolayered MoS2 with zero-dimensional functionalized CsPbBr3 QDs were prepared,and their nanoscale optical characteristics were *** effect of n-type doping on the MoS2 monolayer after hybridization with perovskite CsPbBr3 QDs was observed using laser confocal microscope photoluminescenca (PL) and Raman ***-effect transistors (FETs) using MoS2 and the MoS2-CsPbBr3 QDs hybrid were also fabricated,and their electrical and photoresponsive characteristics were investigated in terms of the charge transfer *** the MoS2-CsPbBr3 QDs-based FETs,the field effect mobility and photoresponsivity upon light irradiation were enhanced by ~ 4 times and a dramatic ~ 17 times,respectively,compared to the FET prepared without the parovskite QDs and without light *** is noteworthy that the photoresponsivity of the MoS-2-CsPbBr3 QDs-based FETs significantly increased with increasing light power,which is completely contrary to the behavior observed in previous studies of MoS2-based *** increased mobility and significant enhancement of the photoresponsivity can be attributed to the n-type doping effect and efficient energy transfer from CsPbBr3 QDs to *** results indicate that the optoelectronic characteristics of MoS2-based FETs can be significantly improved through hybridization with photosensitive parovskite CsPbBr3 QDs.

关键词： MoS2 perovskite quantum dot transistor photoresponsivity mobility charge transfer

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