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| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
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| ○ | ○ | Article; Proceedings Paper | Development of a high-sensitivity radon monitor for a radon calibration system at KRISS | A radon calibration system is being developed with a high-sensitivity radon detector using electrostatic collection and an alpha spectrometer. Eight radon cells, each with a volume of 1.354 L, are integrated to achieve a high-sensitivity radon monitor with a total detector volume of 10.832 L. The sensitivity is estimated to be 35.6 +/- 0.2 (36.8 +/- 0.2) times higher relative to the RAD7 radon monitor for the detection of Po-218 (Po-214), respectively. | Hwang, S. H.; Han, M. J.; Seon, Y. G.; Lee, J. M.; Lee, K. B. | Korea Res Inst Stand & Sci KRISS, Daejeon 34113, South Korea; Univ Sci & Technol UST, Daejeon 34113, South Korea; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea | 55183771300; 57217135046; 56531877800; 17137230200; 59612763600 | shhwang@kriss.re.kr; | APPLIED RADIATION AND ISOTOPES | APPL RADIAT ISOTOPES | 0969-8043 | 164 | SCIE | CHEMISTRY, INORGANIC & NUCLEAR;NUCLEAR SCIENCE & TECHNOLOGY;RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | 2020 | 1.513 | 42.7 | 0.5 | 2025-06-25 | 6 | 6 | Radon (Rn-222); Radon calibration; Electrostatic radon detector | DETECTOR | Electrostatic radon detector; Radon (<sup>222</sup>Rn); Radon calibration | Calibration; Limit of Detection; Radiometry; Radon; Static Electricity; Calibration; polonium; polonium 214; polonium 218; radon; radon 222; unclassified drug; radon; Alpha spectrometer; Calibration system; High sensitivity; Radon detectors; Radon monitors; alpha radiation; Article; controlled study; electric field; electric potential; equipment design; noise; priority journal; sensitivity analysis; calibration; devices; limit of detection; radiometry; static electricity; Radon | English | 2020 | 2020-10 | 10.1016/j.apradiso.2020.109228 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Flux-weighted average cross sections of medical isotopes in the ¹²⁷I(γ,xn) reactions with the bremsstrahlung end-point energies of 50 and 70MeV | The flux-weighted average cross sections of I-127(gamma,xn)I-126,I-124,I-123 reactions were experimentally determined with the bremsstrahlung end-point energies of 50 and 70 MeV by activation and off-line gamma-ray spectrometric technique, using the 100 MeV electron linac at the Pohang Accelerator Laboratory, Korea. The I-127(gamma,xn)I126-121 reaction cross sections as a function of photon energy were theoretically calculated using the TALYS 1.8 code. The flux-weighted average cross sections of I-127(gamma, xn)I-126,I-124,I-123 reactions as a function of bremsstrahlung end-point energies were also obtained from the literature and TALYS data based on mono-energetic photons and are found to be in close agreement with the present data. The experimental and theoretical I-127(gamma, xn)I126-121 reaction cross-sections increase with bremsstrahlung energy, which indicates the role of excitation energy. After a certain energy, the individual I-127(gamma, xn)I126-121 reaction cross sections decrease with increase of bremsstrahlung energy due to opening of other reactions, which indicates sharing of energy in different reaction channels. The radioactive iodine isotopes production cross-sections are important for the useful medical purpose. | Naik, Haladhara; Kim, Guinyun; Kim, Kwangsoo; Zaman, Muhamad; Thi Hien Nguyen | Bhabha Atom Res Ctr, Radiochem Div, Mumbai 400085, Maharashtra, India; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea | Nguyen, Thong/ABV-0605-2022 | 7005890232; 35313854400; 36137214700; 7102724138; 57201066391 | gnkim@knu.ac.kr; | APPLIED RADIATION AND ISOTOPES | APPL RADIAT ISOTOPES | 0969-8043 | 156 | SCIE | CHEMISTRY, INORGANIC & NUCLEAR;NUCLEAR SCIENCE & TECHNOLOGY;RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | 2020 | 1.513 | 42.7 | 0 | 2025-06-25 | 0 | 0 | I-127(gamma xn)I126-121 reaction cross-sections; Al-27(gamma 2pn)Na-24 reaction flux monitor; Bremsstrahlung end-point energies of 50 and 70 MeV; Activation and off-line gamma-ray spectrometric technique; TALYS 1.8 | <sup>127</sup>I(γ; <sup>27</sup>Al(γ; 2pn)<sup>24</sup>Na reaction flux monitor; Activation and off-line γ–ray spectrometric technique; Bremsstrahlung end-point energies of 50 and 70 MeV; TALYS 1.8; xn)<sup>126−121</sup>I reaction cross-sections | Chemical activation; Isotopes; Linear accelerators; Photons; Point contacts; Spectrometry; Statistical methods; iodine 123; iodine 124; iodine 126; radioactive iodine; unclassified drug; End points; Energetic photons; Production cross section; Radioactive iodine isotopes; Reaction channels; Reaction cross-sections; Spectrometric techniques; TALYS 1.8; Article; brems radiation; electron radiation; gamma radiation; photon; priority journal; X ray spectroscopy; Gamma rays | English | 2020 | 2020-02 | 10.1016/j.apradiso.2019.108842 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article; Proceedings Paper | The primary system for measurement of beta emitting radioactive gases at KRISS | Korea Research Institute of Standards and Science (KRISS) is developing a length-compensated proportional counting (LCPC) system as a primary system for standardization of beta emitting radioactive gases. The pilot experiment was performed with Kr-85 and the optimized high voltage and pressure were found to be 1700 V and 0.203 MPa, respectively. The total activity of Kr-85 was deduced by the length compensation of each count. The expanded uncertainty was estimated to be around 0.8% (k = 2) for the Kr-85 measurement. | Seon, Y.; Hwang, S. H.; Lee, J. M.; Lee, K. B.; Heo, D. H.; Han, M. J.; Kim, H. J. | Korea Res Inst Stand & Sci KRISS, Daejeon 34113, South Korea; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Univ Sci & Technol UST, Daejeon 34113, South Korea; Dewetron Korea LTD, Daejeon 34051, South Korea | ; Seon, Yonggeun/AAV-1976-2020; Kim, Hong Joo/AAE-1178-2022 | 56531877800; 55183771300; 17137230200; 59612763600; 57216408760; 57217135046; 59051568100 | shhwang@kriss.re.kr; | APPLIED RADIATION AND ISOTOPES | APPL RADIAT ISOTOPES | 0969-8043 | 164 | SCIE | CHEMISTRY, INORGANIC & NUCLEAR;NUCLEAR SCIENCE & TECHNOLOGY;RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | 2020 | 1.513 | 42.7 | 0 | 2025-06-25 | 0 | 0 | Length-compensated proportional counter; Kr-85 gas; Beta emitting radioactive gas; Primary system | <sup>85</sup>Kr gas; Beta emitting radioactive gas; Length-compensated proportional counter; Primary system | Radioactivity; beta emitting radioactive gas; krypton 85; radioisotope; unclassified drug; High voltage; Pilot experiment; Primary systems; Radioactive gas; Research institutes; Article; controlled study; electric potential; length compensated proportional counting; pilot study; pressure gradient; priority journal; process optimization; radiation measurement; radioactivity; South Korea; standardization; uncertainty; Uncertainty analysis | English | 2020 | 2020-10 | 10.1016/j.apradiso.2020.109238 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Curves on Segre threefolds | We study locally Cohen-Macaulay curves of low degree in the Segre threefold P-1 x P-1 x P-1 and investigate the irreducible and connected components, respectively, of the Hilbert scheme of them. We also apply the similar argument to the Segre threefold P-2 x P-1. | Ballico, Edoardo; Chung, Kiryong; Huh, Sukmoon | Sungkyunkwan Univ, Suwon 440746, South Korea; Univ Trento, I-38123 Povo, TN, Italy; Kyungpook Natl Univ, Dept Math Educ, 80 Daehakro, Daegu 41566, South Korea | 55551123500; 47061194800; 35147737600 | edoardo.ballico@unitn.it;krchung@knu.ac.kr;sukmoonh@skku.edu; | FORUM MATHEMATICUM | FORUM MATH | 0933-7741 | 1435-5337 | 32 | 1 | SCIE | MATHEMATICS, APPLIED;MATHEMATICS | 2020 | 1.056 | 42.9 | 0.17 | 2025-06-25 | 2 | 2 | Locally Cohen-Macaulay curve; Hilbert scheme; pure sheaf; moduli space | HILBERT SCHEME; SPACE; MODULI; FAMILIES | Hilbert scheme; Locally Cohen-Macaulay curve; moduli space; pure sheaf | English | 2020 | 2020-01 | 10.1515/forum-2019-0001 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Patterns of Delaying Surgery for Breast Cancer During the COVID-19 Outbreak in Daegu, South Korea | Background: The coronavirus disease 2019 (COVID-19) outbreak in South Korea has affected the diagnosis, treatment, and follow-up protocols of various cancers. This study investigated the patterns of delaying surgery for breast cancer during the COVID-19 outbreak in South Korea and evaluated factors that may have affected the decision to delay surgery. Methods: From February 18 to April 18, 2020, which was the critical period for COVID-19 in South Korea, patients with breast cancer who were scheduled for surgery were evaluated in terms of their decision in delaying the procedure. The patients were divided into two groups: delaying and non-delaying surgery groups. The association between personal and clinicopathological factors and delaying surgery was evaluated. Results: In patients belonging to the delaying surgery group, the mean delay period was 15.9 (standard deviation [SD], +/- 10.9) days. Patients in the non-delaying surgery group were relatively younger (p = 0.003), single (p = 0.038), had planned mastectomy (p = 0.041), received needle biopsy for diagnosis (p = 0.021), and had a higher clinical N stage (p = 0.049) and multifocal lesions of breast cancer (p = 0.020). However, there were no significant differences in terms of the pathological T and N stages between the two groups. Conclusion: During the COVID-19 outbreak, there was no occurrence of nosocomial infection in the non-delaying surgery group and no statistical difference in pathological stage between the delaying and non-delaying surgery groups. Although patients in the delaying surgery group tended to be relatively older and married and had planned small-scale surgery with a good prognosis of breast cancer, the prognosis did not appear to have changed whether delaying or proceeding with surgery for breast cancer during the COVID-19 outbreak. | Lee, Jeeyeon; Jung, Jin Hyang; Kim, Wan Wook; Park, Chan Sub; Park, Ho Yong | Kyungpook Natl Univ, Chilgok Hosp, Sch Med, Dept Surg, Daegu, South Korea | PARK, JUN-YOUNG/P-5981-2015 | 37079213100; 57209310173; 26023273400; 57208483662; 56564377200 | phy123@knu.ac.kr; | FRONTIERS IN SURGERY | FRONT SURG | 2296-875X | 7 | SCIE | SURGERY | 2020 | 2.718 | 42.9 | 0.89 | 2025-06-25 | 7 | 8 | COVID-19; breast carcinoma; surgery; delay; Korea | GUIDELINES; DIAGNOSIS; SEVERITY | breast carcinoma; COVID-19; delay; Korea; surgery | English | 2020 | 2020-10-08 | 10.3389/fsurg.2020.576196 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Identification of begomoviruses from different cryptic species of Bemisia tabaci in Bangladesh | Bemisia tabaci is a global species complex consisting of at least 40 cryptic species. It is also a vector for at least 100 species of begomovirus, many of which cause severe crop damage. The relationship between begomoviruses and cryptic species of the B. tabaci species complex, however, remains unclear. Our previous study [13] was identified four cryptic species (Asia I, Asia II 1, Asia II 5, and Asia II 10) of B. tabaci from Bangladesh. Using those 110 whitefly samples, vector-based PCR analysis identified 8 different begomovirus species: BYVMV, BGYVV, OELCV, SLCCV, SLCV, TbCSV, ToLCBV, and ToLCNDV. The overall rate of virus infection was 26.4%, and BYVMV and ToLCNDV were the most frequently detected in the B. tabaci vector. Virus infection rates for Asia I, Asia II 1, Asia II 5, and Asia II 10 were 22.4% (15/67), 35% (7/20), 27.3% (6/22), and 100% (1/1), respectively. Each cryptic species infected multiple virus species, but SLCCV, TbCSV, and BGYVV were each only detected in, Asia I, Asia II 1, and Asia II 5, respectively. This study demonstrates the geographic distribution of various begomoviruses in Bangladesh and their relationships with cryptic species of B. tabaci. | Khatun, Mst Fatema; Hwang, Hwal-Su; Shim, Jae-Kyoung; Kil, Eui-Joon; Lee, Sukchan; Lee, Kyeong-Yeoll | Kyungpook Natl Univ, Coll Agr & Life Sci, Div Appl Biosci, Daegu 41566, South Korea; Bangabandhu Sheikh Mujibur Rahman Agr Univ, Dept Entomol, Dhaka, Bangladesh; Sungkyunkwan Univ, Dept Genet Engn, Suwon, South Korea; Kyungpook Natl Univ, Inst Plant Med, Daegu, South Korea; Kyungpook Natl Univ, Inst Agr Sci & Technol, Daegu, South Korea | Kil, Eui-Joon/AAZ-9823-2020; Kil, Eui-Joon/AFE-1359-2022 | 57203131585; 57204055221; 7201856347; 26534336800; 57213176749; 57217153096 | leeky@knu.ac.kr; | MICROBIAL PATHOGENESIS | MICROB PATHOGENESIS | 0882-4010 | 142 | SCIE | IMMUNOLOGY;MICROBIOLOGY | 2020 | 3.738 | 43.0 | 0.45 | 2025-06-25 | 8 | 9 | Begomovirus; Cryptic species; Genetic diversity; Vector; Whitefly | LEAF CURL DISEASE; MOLECULAR CHARACTERIZATION; MOSAIC-VIRUS; 1ST REPORT; TOMATO; TRANSMISSION; GEMINIVIRUSES; ACCURACY; SEQUENCE; STRAIN | Begomovirus; Cryptic species; Genetic diversity; Vector; Whitefly | Article; Bangladesh; Begomovirus; BGYVV virus; BYVMV virus; controlled study; cryptic species; disease transmission; geographic distribution; infection rate; nonhuman; OELCV virus; polymerase chain reaction; priority journal; SLCCV virus; SLCV virus; sweet potato whitefly; TbCSV virus; ToLCBV virus; ToLCNDV virus; virus detection; virus identification; virus infection | English | 2020 | 2020-05 | 10.1016/j.micpath.2020.104069 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Inhibitory effect of oolonghomobisflavan B on osteoclastogenesis by suppressing p38 MAPK activation | Suppression of differentiation and/or function of osteoclasts is considered an effective therapeutic strategy for osteolytic bone diseases such as periodontitis and osteoporosis. Evidence regarding the health benefits of oolong tea consumption is accumulating, and tea polyphenols have various pharmacological properties such as anticancer and anti-diabetes effects. In this study, we investigated the effect of oolonghomobisflavan B (OFB), a polyphenolic compound in oolong tea, on osteoclast differentiation. OFB suppressed receptor activator of nuclear factor-kappa B (RANKL)-induced formation of tartate-resistant acid phosphatase-positive multinuclear cells without cytotoxicity. OFB also significantly attenuated p38 phosphorylation, which is essential for RANKL-induced osteoclastogenesis, and inhibited the expressions of nuclear factor of activated T cells, cytoplasmic 1 (NFATc1) and osteoclast-specific target genes, including dendritic cell-specific transmembrane protein and cathepsin K. Our findings suggest that OFB exhibits an anti-osteoclastogenic activity by inhibiting RANKL-mediated p38 activation, which is useful for the prevention and treatment of osteolytic bone diseases. | Lim, Soomin; Kim, Tae Hoon; Ihn, Hye Jung; Lim, Jiwon; Kim, Gi-Young; Choi, Yung Hyun; Bae, Jong-Sup; Jung, Jae-Chang; Shin, Hong-In; Kim, Jung-Eun; Park, Eui Kyun | Kyungpook Natl Univ, Sch Dent, Dept Oral Pathol & Regenerat Med, IHBR, Daegu 41940, South Korea; Daegu Univ, Dept Food Sci & Biotechnol, Gyongsan 38453, South Korea; Kyungpook Natl Univ, Cell & Matrix Res Inst CMRI, Daegu 41940, South Korea; Jeju Natl Univ, Sch Marine Biomed Sci, Dept Marine Life Sci, Jeju 63243, South Korea; Dong Eui Univ, Dept Biochem, Coll Korean Med, Busan 47227, South Korea; Kyungpook Natl Univ, Coll Pharm, Res Inst Pharmaceut Sci, CMRI, Daegu 41566, South Korea; Kyungpook Natl Univ, Coll Nat Sci, Dept Biol, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Med, Dept Mol Med, CMRI, Daegu 41944, South Korea | ; , 이승훈[ 교수 / 의학과 ]/GLN-6251-2022; Kim, Young-Il/ISS-7678-2023; Bae, Jong-Sup/AAU-9724-2020 | 57202647759; 56906394500; 56421724400; 13404844200; 7403063801; 57211727369; 16021543200; 57203377467; 24377179200; 57209054588; 37071072400 | kjeun@knu.ac.kr;epark@knu.ac.kr; | BIOORGANIC & MEDICINAL CHEMISTRY LETTERS | BIOORG MED CHEM LETT | 0960-894X | 1464-3405 | 30 | 18 | SCIE | CHEMISTRY, MEDICINAL;CHEMISTRY, ORGANIC | 2020 | 2.823 | 43.0 | 0.33 | 2025-06-25 | 4 | 6 | Oolong tea; Oolonghomobisflavan B; Osteoclast differentiation; NFATc1; p38 | TEA POLYPHENOLS; OOLONG TEA; RECEPTOR ACTIVATOR; SIGNALING PATHWAY; BONE; DIFFERENTIATION; INDUCTION; DENSITY; TANNINS; NFATC1 | NFATc1; Oolong tea; Oolonghomobisflavan B; Osteoclast differentiation; p38 | Cathepsin K; Cell Differentiation; Dendritic Cells; Drug Discovery; Enzyme Activation; Humans; Membrane Proteins; NF-kappa B; Osteoclasts; Osteogenesis; p38 Mitogen-Activated Protein Kinases; Phosphorylation; Plant Extracts; Polyphenols; RANK Ligand; Signal Transduction; Tea; cathepsin K; membrane protein; mitogen activated protein kinase p38; oolonghomobisflavan B; osteoclast differentiation factor; polyphenol derivative; transcription factor NFAT; unclassified drug; cathepsin K; immunoglobulin enhancer binding protein; membrane protein; mitogen activated protein kinase p38; osteoclast differentiation factor; plant extract; polyphenol; animal cell; Article; cell differentiation; controlled study; drug effect; drug inhibition; embryo; enzyme activation; gene; multinuclear cell; nonhuman; osteoclastogenesis; protein expression; protein phosphorylation; bone development; chemistry; cytology; dendritic cell; drug development; enzyme activation; human; metabolism; osteoclast; phosphorylation; signal transduction; tea | English | 2020 | 2020-09-15 | 10.1016/j.bmcl.2020.127429 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Microencapsulation of polymeric isocyanate for the modification of urea-formaldehyde resins | This study was conducted to prepare the microcapsules of polymeric 4-4 diphenyl methane diisocyanate (MpMDI) by interfacial polymerization using two different surfactants (Tween 40 and Gum Arabic) for the modification of urea-formaldehyde (UF) resins. MpMDI obtained by Tween 40 (TW-MpMDI) were spherical, smooth, and small diameter, while those prepared by Gum Arabic (GA-MpMDI) were irregular, rough surface, and larger diameter. Attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectra of two types of MpMDIs confirmed the successful microencapsulation of pMDI by detecting the isocyanate (N=C=O) groups after rupturing the shell of MpMDIs. As the MpMDI content in UF resins increased, the non-volatile solids content, pH, gelation time, viscosity, and exothermic peak temperature of UF/MpMDI adhesives slightly increased. Plywood bonded with UF/MpMDI adhesives had 15% higher tensile shear strength (TSS) and 30% higher modulus of rupture (MOR) than those of the plywood bonded with neat UF resins owing to the formation of urethane (HN-(C=O)-O-R) bonds. In particular, plywood bonded with UF/TW-MpMDI had higher TSS and MOR values than those bonded with UF/GA-MpMDI adhesive. Regardless of the surfactant types, the formaldehyde emission decreased about 54% with 5% MpMDI addition into UF resins. These results and statistical analysis revealed that 1% TW-MpMDI addition into UF resins provided a proper balance between good adhesion and low formaldehyde emission for plywood. | Lubis, Muhammad Adly Rahandi; Park, Byung-Dae; Lee, Sang-Min | Kyungpook Natl Univ, Dept Wood & Paper Sci, Daegu 41566, South Korea; Natl Inst Forest Sci, Dept Forest Prod, Seoul 02455, South Korea | Park, Byung-Dae/ABB-1934-2020; Lubis, Muhammad/K-2440-2019 | 57192278476; 7402834820; 56242914100 | byungdae@knu.ac.kr; | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | INT J ADHES ADHES | 0143-7496 | 1879-0127 | 100 | SCIE | ENGINEERING, CHEMICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY | 2020 | 3.189 | 43.0 | 1.76 | 2025-06-25 | 32 | 36 | Microencapsulation; MpMDI; Urea-formaldehyde resins; Plywood; Adhesion performance; Formaldehyde emission | INTERFACIAL POLYMERIZATION; ADHESIVES; MICROCAPSULES; EMISSION; PART | Adhesion performance; Formaldehyde emission; Microencapsulation; MpMDI; Plywood; Urea-formaldehyde resins | Adhesion; Adhesives; Encapsulation; Formaldehyde; Gelation; Metabolism; Adhesion; Adhesives; Formaldehyde; Fourier transform infrared spectroscopy; Gelation; Metabolism; Microencapsulation; Plywood; Surface active agents; Synthetic resins; Urea; Wood products; Adhesion performance; Attenuated total reflections; Exothermic peak temperature; Formaldehyde emission; Fourier transform infra reds; Interfacial polymerization; MpMDI; Tensile shear strength; Urea formaldehyde resins | English | 2020 | 2020-07 | 10.1016/j.ijadhadh.2020.102599 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Tetra-aryl cyclobutane and stilbenes from the rhizomes of Rheum undulatum and their α-glucosidase inhibitory activity: Biological evaluation, kinetic analysis, and molecular docking simulation | One achiral tetr alpha-aryl cyclobutane [rheundulin A (1)] and three stilbene glycosides [rheundulins B-D (2-4)] were isolated from the methanol extract of Rheum undulatum L., along with eight known compounds (5-12). Structural determination of the new compounds (1-4) was accomplished using comprehensive spectroscopic methods. Compound 1 represents the first example of a dimeric stilbene linked via a cyclobutane ring from the Rheum genus. All isolates were screened for their inhibition against alpha-glucosidase. Among them, stilbene derivatives (5 and 6) showed strong inhibitory effects on alpha-glucosidase with IC50 values of 0.5 and 15.4 mu M, respectively, which were significantly higher than that of the positive control, acarbose (IC50, = 126.8 mu M). Rheundulin A (1) showed moderate alpha-glucosidase inhibition with an IC50 value of 80.1 mu M. In addition, kinetic analysis and molecular docking simulation of the most active compound (5) with alpha-glucosidase were performed for the first time. Kinetic studies revealed that compound 5 competitively inhibited the active site of alpha-glucosidase (K-i = 0.40 mu M), while 6 had a mixed-type inhibitory effect against alpha-glucosidase (K-i = 15.34 mu M). Molecular docking simulations of 5 and 6 demonstrated negative-binding energies, indicating high proximity to the active site and tight binding to alpha-glucosidase enzyme. | Manh Tuan Ha; Kim, Minji; Kim, Chung Sub; Park, Se-Eun; Kim, Jeong Ah; Woo, Mi Hee; Choi, Jae Sue; Min, Byung Sun | Daegu Catholic Univ, Coll Pharm, Drug Res & Dev Ctr, Gyeongbuk 38430, South Korea; Vietnam Acad Sci & Technol, Ctr Res & Technol Transfer, Lab Res & Appl Biochem, Hanoi, Vietnam; Pukyong Natl Univ, Dept Food & Life Sci, Busan 48513, South Korea; Kyungpook Natl Univ, Coll Pharm, Res Inst Pharmaceut Sci, Daegu 41566, South Korea; Yale Univ, Dept Chem, New Haven, CT 06520 USA | Kim, Chung Sub/GLN-7192-2022; Tuan, Ha/AAW-5444-2021 | 57189040434; 55586842800; 12142324700; 57214081935; 24722570900; 7201527720; 25654629500; 55663638200 | bsmin@cu.ac.kr; | BIOORGANIC & MEDICINAL CHEMISTRY LETTERS | BIOORG MED CHEM LETT | 0960-894X | 1464-3405 | 30 | 8 | SCIE | CHEMISTRY, MEDICINAL;CHEMISTRY, ORGANIC | 2020 | 2.823 | 43.0 | 0.49 | 2025-06-25 | 8 | 8 | Rheum undulatum; Polygonaceae; Tetra-aryl cyclobutane; Stilbene glycoside; alpha-Glucosidase; Kinetic; Molecular docking | CONSTITUENTS; DERIVATIVES; ROOTS; ANTHRAQUINONE | Kinetic; Molecular docking; Polygonaceae; Rheum undulatum; Stilbene glycoside; Tetra-aryl cyclobutane; α-Glucosidase | alpha-Glucosidases; Cyclobutanes; Dose-Response Relationship, Drug; Glycoside Hydrolase Inhibitors; Humans; Kinetics; Molecular Docking Simulation; Molecular Structure; Plant Extracts; Rheum; Rhizome; Stilbenes; Structure-Activity Relationship; acarbose; alpha glucosidase; herbaceous agent; Rheum undulatum extract; rheundulin A; rheundulin B; rheundulin C; rheundulin D; stilbene derivative; unclassified drug; alpha glucosidase; cyclobutane derivative; glycosidase inhibitor; plant extract; stilbene derivative; Article; binding site; carbon nuclear magnetic resonance; controlled study; drug binding; drug screening; drug structure; enzyme inhibition; hydrogen bond; IC50; molecular docking; Polygonaceae; Rheum undulatum; rhizome; chemical structure; chemistry; dose response; human; isolation and purification; kinetics; metabolism; molecular docking; Rheum; rhizome; structure activity relation | English | 2020 | 2020-04-15 | 10.1016/j.bmcl.2020.127049 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | A search for solar axion induced signals with COSINE-100 | We present results from a search for solar axions with the COSINE-100 experiment. We find no evidence of solar axion events from a data-set of 6,303.9 kg . days exposure and set a 90% confidence level upper limit on the axion-electron coupling, g(ae), of 1.70 x 10(-11) for an axion mass less than 1 keV/c(2). This limit excludes QCD axions heavier than 0.59 eV/c(2) in the DFSZ model and 1681 eV/c(2) in the KSVZ model. (C) 2019 Elsevier B.V. All rights reserved. | Adhikari, P.; Adhikari, G.; de Souza, E. Barbosa; Carlin, N.; Choi, S.; Djamal, M.; Ezeribe, A. C.; Ha, C.; Hahn, I. S.; Jeon, E. J.; Jo, J. H.; Joo, H. W.; Kang, W. G.; Kang, W.; Kauer, M.; Kim, G. S.; Kim, H.; Kim, H. J.; Kim, K. W.; Kim, N. Y.; Kim, S. K.; Kim, Y. D.; Kim, Y. H.; Ko, Y. J.; Kudryavtsev, V. A.; Lee, H. S.; Lee, J.; Lee, J. Y.; Lee, M. H.; Leonard, D. S.; Lynch, W. A.; Maruyama, R. H.; Mouton, F.; Olsen, S. L.; Park, B. J.; Park, H. K.; Park, H. S.; Park, K. S.; Pitta, R. L. C.; Prihtiadi, H.; Ra, S.; Rott, C.; Shin, K. A.; Scarff, A.; Spooner, N. J. C.; Thompsonb, W. G.; Yang, L.; Yu, G. H. | Sejong Univ, Dept Phys & Astron, Seoul 05006, South Korea; Yale Univ, Dept Phys, Wright Lab, New Haven, CT 06520 USA; Univ Sao Paulo, Phys Inst, BR-05508090 Sao Paulo, Brazil; Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea; Bandung Inst Technol, Dept Phys, Bandung 40132, Indonesia; Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England; Inst for Basic Sci Korea, Ctr Underground Phys, Daejeon 34126, South Korea; Ewha Womans Univ, Dept Sci Educ, Seoul 03760, South Korea; Sungkyunkwan Univ, Dept Phys, Seoul 16419, South Korea; Univ Wisconsin, Dept Phys, Madison, WI 53706 USA; Univ Wisconsin, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 USA; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; UST, IBS Sch, Daejeon 34113, South Korea; Korea Res Inst Stand & Sci, Daejeon 34113, South Korea; Korea Univ, Grad Sch, Dept Accelerator Sci, Sejong 30019, South Korea; Univ Illinois, Dept Phys, Urbana, IL 61801 USA; Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada | Maruyama, Reina/A-1064-2013; Kim, Hong Joo/AAE-1178-2022; Laranjeira Couto Pitta, Ricardo/K-4152-2018; Lee, Moo/AAK-4266-2020; Ha, Chang Hyon/AAR-8120-2021; Kauer, Matt/AAY-7581-2020; Lee, Jooyoung/HTN-0335-2023; Filho, Nelson/C-2187-2012; KIM, Sun Kee/IQT-8178-2023; Kim, Dong Jin/JMR-1090-2023; DJAMAL, MITRA/JFJ-1152-2023; Schneider Hahn, Ivanete/H-9015-2016; Lee, Jong/A-3198-2011; Yang, Liang/AAT-9994-2020; Rott, Carsten/ABB-1304-2021; Ko, Young/AEI-0838-2022 | 45560951400; 56811058500; 57194684960; 7006320391; 57199723894; 6506355194; 56300952200; 17342119700; 7201832280; 57204519171; 55575536700; 56375205700; 24401181300; 57226331095; 55196156000; 57208178031; 37090888000; 59051568100; 57209988432; 55263267200; 59102407800; 7410207253; 57196171764; 56030036300; 55168152700; 56113238600; 57226402706; 57204797944; 57198252980; 7201953933; 57196020359; 9334469000; 56663105600; 35227722100; 57204904910; 8455192000; 57216599536; 35225979300; 57208178150; 57188983477; 16480794500; 35227850400; 57203522213; 56300978900; 7005922145; 57200581630; 57192656960; 57208174900 | hyunsulee@ibs.re.kr; | ASTROPARTICLE PHYSICS | ASTROPART PHYS | 0927-6505 | 1873-2852 | 114 | SCIE | ASTRONOMY & ASTROPHYSICS;PHYSICS, PARTICLES & FIELDS | 2020 | 2.724 | 43.1 | 0.4 | 2025-06-25 | 7 | 6 | Solar axion; COSINE-100; Dark matter | INVARIANCE; MECHANISM; TESTS | COSINE-100; Dark matter; Solar axion | Astronomy; Astrophysics; Dark Matter; Confidence levels; COSINE-100; Data set; Electron coupling; Induced signal; Solar axion; Solar axions; Upper limits; Bosons | English | 2020 | 2020-01 | 10.1016/j.astropartphys.2019.07.004 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Neutron and muon-induced background studies for the AMoRE double-beta decay experiment | AMoRE (Advanced Mo-based Rare process Experiment) is an experiment to search a neutrinoless double-beta decay of Mo-100 in molybdate crystals. The neutron and muon-induced backgrounds are crucial to obtain the zero-background level (< 10(-5) counts/(keV.kg.yr)) for the AMoRE-II experiment, which is the second phase of the AMoRE project, planned to run at YEMI underground laboratory. To evaluate the effects of neutron and muon-induced backgrounds, we performed Geant4 Monte Carlo simulations and studied a shielding strategy for the AMORE-II experiment. Neutron-induced backgrounds were also included in the study. In this paper, we estimated the background level in the presence of possible shielding structures, which meet the background requirement for the AMoRE-II experiment. (C) 2019 Elsevier B.V. All rights reserved. | Bae, H. W.; Jeon, E. J.; Kim, Y. D.; Lee, S. W. | Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Inst for Basic Sci Korea, Ctr Underground Phys, Daejeon 34126, South Korea | Lee, Suhyun/AAA-3368-2022; Kim, Yeongduk/O-8578-2014 | 59791068100; 57204519171; 7410207253; 57839727600 | ejjeon@ibs.re.kr; | ASTROPARTICLE PHYSICS | ASTROPART PHYS | 0927-6505 | 1873-2852 | 114 | SCIE | ASTRONOMY & ASTROPHYSICS;PHYSICS, PARTICLES & FIELDS | 2020 | 2.724 | 43.1 | 0.46 | 2025-06-25 | 11 | 10 | Geant4 simulation; Neutron background; Muon-induced background; AMoRE; Double-beta decay | FLUX; SIMULATIONS | AMoRE; Double-beta decay; Geant4 simulation; Muon-induced background; Neutron background | Charged particles; Intelligent systems; Monte Carlo methods; Shielding; AMoRE; Double beta decay; GEANT4 simulation; Muon-induced background; Neutron background; Neutrons | English | 2020 | 2020-01 | 10.1016/j.astropartphys.2019.06.006 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Phase developments in Pb(Zn[Ta,Nb,W])O3-PbTiO3 ternary ceramic compositions | The hard-to-synthesize lead-based zinc-bearing trio of Pb(Zn1/3Ta2/3)O-3, Pb(Zn1/3Nb2/3)O-3, and Pb(Zn1/2W1/2)O-3 (PZT, PZN, and PZW) were investigated to understand their structural stability and phase formation. A structure field map is used to discuss the capability of the trio compositions and combinations thereof, to form the perovskite structure, with PbTiO3(PT) introduced as a perovskite stabilizer. We identified the potential omission of the (111) reflections in two International Centre for Diffraction Data (ICDD) sets of a complex-rutile structure, [(Zn1/3Ta2/3)(1/2)Ti-1/2]O-2 and [(Zn1/3Nb2/3)(1/2)Ti-1/2]O-2, and suggest that the intensities of the latter compound need to be re-examined. The perovskite structure started to develop at different fractions of PT, depending upon the species of the trio: PZN required the smallest amount of PT (< 20 mol%), whereas PZW required the greatest (<= 80 mol%). The perovskite-stable composition area was the widest in PZT-PZN-PT and narrowest in PZW-PZT-PT, indicating the comparative ease/difficulty of perovskite formation among the trio compositions. | Lee, Bong-Ho; Kim, Nam-Kyoung | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Daegu Gyeongbuk Inst Sci & Technol, Ctr Core Res Facil, Daegu 42988, South Korea | 55626574400; 7403396717 | nkkim@knu.ac.kr; | JOURNAL OF ELECTROCERAMICS | J ELECTROCERAM | 1385-3449 | 1573-8663 | 45 | 3 | SCIE | MATERIALS SCIENCE, CERAMICS | 2020 | 1.785 | 43.1 | 0 | 2025-06-25 | 0 | 0 | Ceramics; X-ray diffraction; Pb(Zn1; 32; 3(PZT); Pb(Zn1; 32; 3(PZN); Pb(Zn1; 21; 2(PZW); PbTiO(PT) | Ceramics; Pb(Zn<sub>1/2</sub>W<sub>1/2</sub>)O<sub>3</sub>(PZW); Pb(Zn<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>(PZN); Pb(Zn<sub>1/3</sub>Ta<sub>2/3</sub>)O<sub>3</sub>(PZT); PbTiO<sub>3</sub>(PT); X-ray diffraction | Lead titanate; Perovskite; Stability; Titanium dioxide; Ceramic compositions; Diffraction data; Perovskite structures; Phase development; Phase formations; Rutile structure; Structural stabilities; Structure (composition) | English | 2020 | 2020-11 | 10.1007/s10832-021-00230-1 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Study of cosmogenic radionuclides in the COSINE-100 NaI(Tl) detectors | COSINE-100 is a direct detection dark matter search experiment that uses a 106 kg array of eight NaI(Tl) crystals that are kept underground at the Yangyang Underground Laboratory to avoid cosmogenic activation of radioisotopes by cosmic rays. Even though the cosmogenic activity is declining with time, there are still significant background rates from the remnant nuclides. In this paper, we report measurements of cosmogenic isotope contaminations with less than one year half-lives that are based on extrapolations of the time dependent activities of their characteristic energy peaks to activity rates at the time the crystals were deployed underground. For longer-lived Cd-109 (T-1/2 = 1.27 y) and Na-22 (T-1/2 = 2.6 y), we investigate time correlations and coincidence events due to several emissions. The inferred sea-level production rates are compared with calculations based on the ACTIVIA and MENDL-2 model calculations and experimental data. The results from different approaches are in reasonable agreement with each other. For H-3, which has a long, 12.3 year half-life, we evaluated the activity levels and the exposure times that are in reasonable agreement with the time period estimated for each crystals exposure. (C) 2019 Elsevier B.V. All rights reserved. | de Souza, E. Barbosa; Park, B. J.; Adhikari, G.; Adhikari, P.; Carlin, N.; Choi, J. J.; Choi, S.; Djamal, M.; Ezeribe, A. C.; Ha, C.; Hahn, I. S.; Jeon, E. J.; Jo, J. H.; Kang, W. G.; Kauer, M.; Kim, G. S.; Kim, H.; Kim, H. J.; Kim, K. W.; Kim, N. Y.; Kim, S. K.; Kim, Y. D.; Kim, Y. H.; Ko, Y. J.; Kudryavtsev, V. A.; Lee, E. K.; Lee, H. S.; Lee, J.; Lee, J. Y.; Lee, M. H.; Lee, S. H.; Leonard, D. S.; Lynch, W. A.; Manzato, B. B.; Maruyama, R. H.; Neal, R. J.; Olsen, S. L.; Park, H. K.; Park, H. S.; Park, K. S.; Pitta, R. L. C.; Prihtiadi, H.; Ra, S. J.; Rott, C.; Shin, K. A.; Scarff, A.; Spooner, N. J. C.; Thompson, W. G.; Yang, L.; Yu, G. H. | Yale Univ, Dept Phys, New Haven, CT 06520 USA; UST, IBS Sch, Daejeon 34113, South Korea; Sejong Univ, Dept Phys, Seoul 05006, South Korea; Univ Sao Paulo, Phys Inst, BR-05508090 Sao Paulo, Brazil; Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea; Bandung Inst Technol, Dept Phys, Bandung 40132, Indonesia; Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England; Inst for Basic Sci Korea, Ctr Underground Phys, Daejeon 34126, South Korea; Ewha Womans Univ, Dept Sci Educ, Seoul 03760, South Korea; Univ Wisconsin, Dept Phys, Madison, WI 53706 USA; Univ Wisconsin, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 USA; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Korea Res Inst Stand & Sci, Daejeon 34113, South Korea; Korea Univ, Dept Accelerator Sci, Sejong 30019, South Korea; Sungkyunkwan Univ, Dept Phys, Suwon 16419, South Korea; Univ Illinois, Dept Phys, Urbana, IL 61801 USA; Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada | ; Maruyama, Reina/A-1064-2013; KIM, Sun Kee/IQT-8178-2023; Kauer, Matt/AAY-7581-2020; Laranjeira Couto Pitta, Ricardo/K-4152-2018; Kim, Hong Joo/AAE-1178-2022; Lee, Jooyoung/HTN-0335-2023; Ko, Young/AEI-0838-2022; Thompson, William/H-2407-2011; Kim, Dong Jin/JMR-1090-2023; Lee, Seunghyun/AAS-8066-2021; Ha, Chang Hyon/AAR-8120-2021; Lee, Jong/A-3198-2011; Kim, YongDeol/JLM-4590-2023; Rott, Carsten/ABB-1304-2021; Schneider Hahn, Ivanete/H-9015-2016; Filho, Nelson/C-2187-2012; Yang, Liang/AAT-9994-2020; DJAMAL, MITRA/JFJ-1152-2023; Lee, Moo/AAK-4266-2020 | 57194684960; 57204904910; 56811058500; 45560951400; 7006320391; 58263015500; 57199723894; 6506355194; 56300952200; 17342119700; 7201832280; 57204519171; 55575536700; 24401181300; 55196156000; 57208178031; 37090888000; 59051568100; 57209988432; 55263267200; 59102407800; 7410207253; 57196171764; 56030036300; 55168152700; 57226673940; 23477682800; 57226402706; 57204797944; 57198252980; 57257129200; 7201953933; 57196020359; 57211139944; 9334469000; 57211139925; 35227722100; 8455192000; 57216599536; 35225979300; 57208178150; 57188983477; 16480794500; 35227850400; 57203522213; 56300978900; 7005922145; 57200581630; 57192656960; 57208174900 | pbj7363@gmail.com;ejjeon@ibs.re.kr; | ASTROPARTICLE PHYSICS | ASTROPART PHYS | 0927-6505 | 1873-2852 | 115 | SCIE | ASTRONOMY & ASTROPHYSICS;PHYSICS, PARTICLES & FIELDS | 2020 | 2.724 | 43.1 | 0.86 | 2025-06-25 | 17 | 17 | Cosmogenic radionuclide; Activity; Production rate; COSINE-100 | MODEL | Activity; COSINE-100; Cosmogenic radionuclide; Production rate | Cosmology; Sea level; Sodium Iodide; Thermodynamic properties; Characteristic energy; COSINE-100; Cosmogenic isotopes; Cosmogenic radionuclides; Dark matter searches; Production rates; Time-dependent activity; Underground laboratory; Radioisotopes | English | 2020 | 2020-02 | 10.1016/j.astropartphys.2019.102390 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Effect of Sodium Phosphate and Calcium Nitrate Sealing Treatment on Microstructure and Corrosion Resistance of Wire Arc Sprayed Aluminum Coatings | Aluminum coating was deposited by arc thermal spraying process onto the steel substrate for the corrosion protection in aggressive environment. However, the arc thermal sprayed coating possesses defects in the coating. Thus, it is important to reduce the defects and enhance the corrosion resistance properties of the deposited coating using post-treatment. In the present study, we have used different concentrations of sodium phosphate mono basic (NaH2PO4) with 0.1 molar (M) calcium nitrate [Ca(NO3)(2)] as post-treatment solution to fill out the defects of the Al coating. It was observed by scanning electron microscopy (SEM) that 1 M NaH2PO4 with 0.1 M Ca(NO3)(2) treated sample exhibited 71% reduction in defects compared to as coated samples. X-ray diffraction (XRD) was performed to determine the phases formed on the coating surface after treatments. XRD confirms the formation of sodium aluminum hydrogen phosphate (Na3Al(OH)(HPO4)(PO4)) and brushite (Ca(HPO4)(H2O)(2)) as composite oxides on the Al coating. Electrochemical results show that 0.5 M NaH2PO4 with 0.1 M Ca(NO3)(2) treated sample has exhibited the highest charge transfer resistance and the lowest corrosion current density after 89 days of exposure in 3.5 wt.% NaCl solution. The enhancement in corrosion resistance of 0.5 M NaH2PO4 with 0.1 M Ca(NO3)(2) treated sample attributed to the formation of adherent, sparingly soluble, and stable corrosion products. The volume fraction result of the corrosion products formed on 0.5 M NaH2PO4 with 0.1 M Ca(NO3)(2) treated sample after 89 days of exposure in 3.5 wt.% NaCl using XRD confirms the highest amount of Bayerite (alpha-Al(OH)(3)) deposition, thus, the corrosion rate of this sample was the lowest. | Lee, Han-Seung; Kumar, Ashutosh; Mandal, Soumen; Singh, Jitendra Kumar; Aslam, Fahid; Alyousef, Rayed; Albduljabbar, Hisham | Hanyang Univ, Dept Architectural Engn, 1271 Sa 3 Dong, Ansan 15588, South Korea; Mahatma Gandhi Kashi Vidyapeeth Univ, Sri Baldeo Post Grad Coll Baragaon, Dept Chem, Varanasi 221204, Uttar Pradesh, India; Kyungpook Natl Univ, Intelligent Construct Automat Ctr, 80 Daehak Ro, Daegu 41566, South Korea; Hanyang Univ, Dept Architectural Engn, Innovat Durable Bldg & Infrastruct Res Ctr, 1271 Sa 3 Dong, Ansan 15588, South Korea; Prince Sattam Bin Abdul Aziz Univ, Coll Engn, Civil Engn Dept, Al Kharaj 11942, Saudi Arabia | ALABDULJABBAR, HISHAM/LMN-4849-2024; Alyousef, Rayed/AAD-5876-2020; Lee, HanSeung/E-9087-2013; Aslam, Fahid/AAG-4938-2020; Mandal, Soumen/AAB-3917-2021; Lee, Han-Seung/E-9087-2013; Singh, Jitendra/AAU-6579-2021 | 57956643400; 57215268716; 57214752240; 57197846307; 55629788200; 56554240700; 57214759269 | ercleehs@hanyang.ac.kr;ashutoshchemistry456@gmail.com;sou.chm@gmail.com;jk200386@hanyang.ac.kr;engfahid@gmail.com;r.alyousef@psau.edu.sa;h.alabduljabbar@psau.edu.sa; | COATINGS | COATINGS | 2079-6412 | 10 | 1 | SCIE | MATERIALS SCIENCE, COATINGS & FILMS;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2020 | 2.881 | 43.4 | 0.92 | 2025-06-25 | 11 | 16 | aluminum; steel; coating; corrosion; cathodic protection; arc thermal spray; scanning electron microscopy; X-ray diffraction | SOL-GEL COATINGS; PROTECTION; ALLOY; BEHAVIOR; STEEL; ZN; MORPHOLOGY; THICKNESS; ELECTRODE; FILM | Aluminum; Arc thermal spray; Cathodic protection; Coating; Corrosion; Scanning electron microscopy; Steel; X-ray diffraction | English | 2020 | 2020-01 | 10.3390/coatings10010033 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Electrochemical Response of Clay/Polyelectrolyte Composite Barrier Coatings | Composite materials made of polymer and clay are effective at blocking mass transport. In this study, the blocking efficacy of layer-by-layer (LbL) coatings of exfoliated montmorillonite (MMT) and polyethylenimine (PEI) was studied using cyclic voltammetry and a redox couple, indigo carmine (IC). The pH of the MMT solution was varied from 4 to 10 to prepare LbL coatings of different surface roughness on metal substrates. It was found that the coated electrode had a lower redox peak current value than without the coating, demonstrating the reduction of the mass transport of IC to the metal surface. The peak values decreased with decreasing the coating's roughness and increasing the number of layers, indicating that the blocking capability can be controlled by changing the deposition conditions. Smooth LbL coatings deposited with MMT at pH 4 showed the highest blocking efficacy up to 97.5%. The IC adsorbed at the interface between the coating and the metal substrate was found to cause the peak current measured for the coated electrode. It was also confirmed that the same coating on the copper substrate reduced the corrosion of the copper during the electrochemical potential cycling. | Kim, Sumin; Byeon, Clare Chisu; Kim, Sung Yeol | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | kim, sung/D-1412-2013 | 57220179666; 55987812100; 19337822900 | sumini0525@naver.com;byeon@knu.ac.kr;sykimknu@knu.ac.kr; | COATINGS | COATINGS | 2079-6412 | 10 | 12 | SCIE | MATERIALS SCIENCE, COATINGS & FILMS;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2020 | 2.881 | 43.4 | 0.21 | 2025-06-25 | 2 | 3 | layer-by-layer; clay; corrosion; cyclic voltammetry; redox couple; mass transport | GAS BARRIER; HIGH-POWER; LAYER; ELECTRODES; BEHAVIOR; COPPER; CLAY; PH | Clay; Corrosion; Cyclic voltammetry; Layer-by-layer; Mass transport; Redox couple | English | 2020 | 2020-12 | 10.3390/coatings10121173 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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