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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 | Historical climate change impacts on the water balance and storage capacity of agricultural reservoirs in small ungauged watersheds | Study region: Agricultural reservoirs are the principal source of irrigation supplies for sustaining rice production and play a critical role in the water resource management of South Korea. Study focus: We comprehensively evaluated the performance of 400 major agricultural reservoirs, spread throughout the country, as a function of climate change during 1973-2017 considering the constituents of reservoir water balance, such as watershed runoff, irrigation water demand, and evaporation loss. New hydrological insights: Based on the trend analysis during the 45-year study period, the reservoir inflows remained higher than the irrigation water demands because of the gradually increasing annual rainfall. Most reservoirs had enough storage capacities; their resilience gradually declined particularly during the last 15 years. The northern and northeastern region reservoirs had acceptable resilience whereas the reservoirs in the western and southwestern inland and coastal regions showed insufficient resilience. Reservoirs received sufficient inflows but the residence time of the excess inflow has to be increased to suffice the peak irrigation demands in the coming cropping season. Study outcomes could help prioritize the reservoirs requiring immediate rehabilitation located in the central and southwest regions with high failure risks. Results suggested that a reservoir with a watershed-irrigated area ratio > 5 would have a better chance of coping with future climate change threats. | Ahmad, Mirza Junaid; Cho, Gun-ho; Choi, Kyung Sook | Kyungpook Natl Univ, Dept Agr Civil Engn, Daegu, South Korea; Texas A&M AgriLife Res, Dept Biol & Agr Engn, College Stn, TX 77843 USA; Kyungpook Natl Univ, Inst Agr Sci & Technol, Dept Agr Civil Engn, Daegu, South Korea | Ahmad, Mirza/AAD-5982-2020 | 57201479907; 57208327000; 54392662900 | ks.choi@knu.ac.kr; | JOURNAL OF HYDROLOGY-REGIONAL STUDIES | J HYDROL-REG STUD | 2214-5818 | 41 | SCIE | WATER RESOURCES | 2022 | 4.7 | 18.0 | 0.96 | 2025-06-25 | 8 | 9 | Agricultural reservoirs; Water balance; Reliable storage capacity; Recharge index; Water deficit index | IRRIGATION VULNERABILITY ASSESSMENT; FAO PENMAN-MONTEITH; REFERENCE EVAPOTRANSPIRATION; UNITED-STATES; PADDY FIELDS; TANK MODEL; REQUIREMENT; EVAPORATION; RAINFALL; RUNOFF | Agricultural reservoirs; Recharge index; Reliable storage capacity; Water balance; Water deficit index | English | 2022 | 2022-06 | 10.1016/j.ejrh.2022.101114 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Immobilization of Collagen on the Surface of a PEEK Implant with Monolayer Nanopores | Polyetheretherketone (PEEK) is the only polymer material that can replace titanium implants in the field of orthopedics. This is because the mechanical properties of PEEK are similar to those of bone, and PEEK has natural radiolucency, chemical stability, and sterilization resistance. Despite these advantages, PEEK has a disadvantage-that it is bio-inert. Therefore, many studies have attempted to change the bio-inertness of PEEK into bioactivity. Among them, a method of forming pores by acid treatment is attracting attention. In this study, an attempt was made to form pores on the surface of PEEK implant using a mixed acid of sulfuric acid and nitric acid. As a result, it was found that the condition when the PEEK surface is in contact with the acid is very important. That is, it was possible to form single-layered nanopores on the surface by contacting PEEK with a mixed acid under ultrasound. Additionally, by immobilizing type I collagen on the porous PEEK surface through dopamine coating, it was possible to obtain collagen-immobilized porous PEEK (P-PEEK-Col) with high compatibility with osteoblasts. This P-PEEK-Col has high potential for use as a bone substitute that promotes bone formation. | Kim, Hun; Lee, Yang Ho; Kim, Nam Kwon; Kang, Inn Kyu | Jeil Med Corp, Inst Jeil Life Engn, Seoul 08375, South Korea; Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea | 57196024332; 57659633600; 57659016400; 7203062733 | biohuny@jeilmed.co.kr;fine.lee31@gmail.com;tstar@jeilmed.co.kr;ikkang@knu.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 9 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.82 | 2025-06-25 | 11 | 11 | PEEK; orthopedics; acid treatment; surface; single-layered nanopores | IN-VITRO; OSTEOGENIC DIFFERENTIATION; MECHANICAL-PROPERTIES; CELLULAR-RESPONSE; POLYETHERETHERKETONE; SCAFFOLDS; OSTEOINTEGRATION; COMPATIBILITY; OSTEOBLASTS; ADHESION | acid treatment; orthopedics; PEEK; single-layered nanopores; surface | Amines; Chemical stability; Monolayers; Nanopores; Orthopedics; Polymeric implants; Acid treatments; Condition; Immobilisation; Mixed acids; Polyetheretherketone; Polymer materials; Single-layered nanopore; Titanium implants; Type I collagen; Type-I collagen; Collagen | English | 2022 | 2022-05 | 10.3390/polym14091633 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | In Vivo Toxicity and Pharmacokinetics of Polytetrafluoroethylene Microplastics in ICR Mice | The increased use of plastics has led to severe environmental pollution, particularly by microplastics-plastic particles 5 mm or less in diameter. These particles are formed by environmental factors such as weathering and ultraviolet irradiation, thereby making environmental pollution worse. This environmental pollution intensifies human exposure to microplastics via food chains. Despite potential negative effects, few toxicity assessments on microplastics are available. In this study, two sizes of polytetrafluoroethylene (PTFE) microplastics, approximately 5 mu m and 10-50 mu m, were manufactured and used for single and four-week repeated toxicity and pharmacokinetic studies. Toxicological effects were comprehensively evaluated with clinical signs, body weight, food and water consumption, necropsy findings, and histopathological and clinical-pathological examinations. Blood collected at 15, 30 60, and 120 min after a single administration of microplastics were analyzed by Raman spectroscopy. In the toxicity evaluation of single and four-week repeated oral administration of PTFE microplastics, no toxic changes were observed. Therefore, the lethal dose 50 (LD50) and no-observed-adverse-effect-level (NOAEL) of PTFE microplastics in ICR mice were established as 2000 mg/kg or more. PTFE microplastics were not detected in blood, so pharmacokinetic parameters could not be calculated. This study provides new insight into the long-term toxicity and pharmacokinetics of PTFE microplastics. | Lee, Sijoon; Kang, Kyung-Ku; Sung, Soo-Eun; Choi, Joo-Hee; Sung, Minkyoung; Seong, Keum-Yong; Lee, Jian; Kang, Subin; Yang, Seong Yun; Lee, Sunjong; Lee, Kyeong-Ryoon; Seo, Min-Soo; Kim, KilSoo | Daegu Gyeongbuk Med Innovat Fdn, Preclin Res Ctr, Daegu 41061, South Korea; Gyeongsang Natl Univ, Inst Anim Med, Jinju 52828, South Korea; Gyeongsang Natl Univ, Dept Vet Med, Jinju 52828, South Korea; Pusan Natl Univ, Life & Ind Convergence Inst, Dept Biomat Sci, BK21 Four Program, Miryang 50463, South Korea; Korea Inst Ind Technol, Cheonan 31056, South Korea; Korea Res Inst Biosci & Biotechnol, Lab Anim Resource Ctr, Cheongju 28116, South Korea; Univ Sci & Technol, Dept Biosci, Daejeon 34113, South Korea; Kyungpook Natl Univ, Coll Vet Med, Dahakro 80, Daegu 41566, South Korea | Yang, Seung/B-5974-2016; Lee, Sijoon/LIC-1291-2024 | 57219164019; 57215079376; 56051194000; 55882556800; 57256838000; 56473397700; 57750625600; 57750880600; 57750369400; 57129404900; 35409534300; 35254332100; 35272034300 | sjlee1013@kmedihub.re.kr;kangkk@kmedihub.re.kr;sesung@kmedihub.re.kr;cjh522@kmedihub.re.kr;tjdalsrud27@naver.com;ky.seong0124@gmail.com;paperin163@gmail.com;kangsb1789@gmail.com;syang@pusan.ac.kr;sunjong1774@kitech.re.kr;kyeongrlee@kribb.re.kr;msseo@kmedihub.re.kr;kskim728@knu.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 11 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 1.42 | 2025-06-25 | 18 | 19 | microplastics; polytetrafluoroethylene; toxicity evaluation; pharmacokinetics | POLYSTYRENE MICROPLASTICS; PLASTIC DEBRIS; PARTICLES; POLLUTION; WATER; FISH; SPECTROSCOPY; SEDIMENTS; EXPOSURE; LAKE | microplastics; pharmacokinetics; polytetrafluoroethylene; toxicity evaluation | Blood; Irradiation; Mammals; Microplastic; Pharmacokinetics; Pollution; Toxicity; Environmental factors; Environmental pollutions; Human exposures; In-vivo; Microplastics; Plastic particle; Toxicity evaluation; Ultraviolet irradiations; Vivo pharmacokinetics; Vivo toxicity; Polytetrafluoroethylenes | English | 2022 | 2022-06 | 10.3390/polym14112220 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Lewis Acid-Doped Conjugated Polymer Nanolayers for Efficient Hole Injection in Phosphorescent Organic Light-Emitting Devices | Here, we demonstrate that the hole injection characteristics of phosphorescent organic light-emitting devices (OLEDs) can be greatly improved by introducing a Lewis acid-doped conjugated polymer nanolayer. Tris(pentafluorophenyl)borane (BCF) and poly(3-hexylthiophene) (P3HT) were employed as a Lewis acid and conjugated polymer, respectively. The color of P3HT solutions quickly changed to a deep purple upon addition of BCF regardless of the BCF molar ratio, while optical absorption peaks (wavelength = 650-1100 nm) were measured for the BCF-doped P3HT (P3HT:BCF) films. The surface and electronic structures of P3HT:BCF nanolayers were examined with atomic force microscopy (AFM) and ultraviolet photoelectron spectroscopy (UPS), respectively. The electron spin resonance (ESR) spectroscopy was used to prove the existence of single (unpaired) electrons in the P3HT:BCF films. The phosphorescent OLEDs with the P3HT:BCF nanolayers showed a remarkable enhancement of luminance from ca. 575 cd/m(2) (BCF = 0 mol %) to 26,910 cd/m(2) (70 mol %), leading to a high current efficiency of ca. 19 cd/A (70 mol %). | Lee, Sooyong; Kim, Hwajeong; Kim, Youngkyoo | Kyungpook Natl Univ, Organ Nanoelect Lab, Daegu 41566, South Korea; Kyungpook Natl Univ, KNU Inst Nanophoton Applicat KINPA, Dept Chem Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Priority Res Ctr, Inst Environm Sci & Technol, Daegu 41566, South Korea | 55421486100; 15520531700; 10340424400 | ykimm@knu.ac.kr; | ACS APPLIED POLYMER MATERIALS | ACS APPL POLYM MATER | 2637-6105 | 4 | 10 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.18 | 2025-06-25 | 3 | 2 | OLED; conjugated polymer; Lewis acid; hole injection; conductivity | SMALL-MOLECULE; OLEDS; LAYER; FILM | conductivity; conjugated polymer; hole injection; Lewis acid; OLED | Conjugated polymers; Current density; Electron spin resonance spectroscopy; Light absorption; Magnetic moments; Molar ratio; Organic light emitting diodes (OLED); Phosphorescence; Quantum chemistry; Ultraviolet photoelectron spectroscopy; Absorption peaks; Acid doped; Conductivity; Holes injection; Lewis Acid; Molar ratio; Nano layers; Organic light-emitting devices; Poly (3-hexylthiophene); Tris(pentafluorophenyl)borane; Electronic structure | English | 2022 | 2022-10-14 | 10.1021/acsapm.2c00617 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Mechanically Robust and Transparent Polyamideimide Films via Consecutive Polycondensation, Amidation, Acid Removal, and Bluing Agent Addition | Polyamideimides were prepared via consecutive high-temperature polycondensation imidization and amidation. The acid byproduct generated during amidation was removed using propylene oxide as a reactive additive, avoiding cumbersome purification. All of the varnishes had appropriate viscosities for film casting: 2300-6300 cP at 15 wt % concentration in a mixed solvent of gamma-butyrolactone and N,N-dimethylacetamide. The solubility parameters of the obtained polymers were around 24.0 MPa1/2, close to that of N,N-dimethylacetamide; the densities and fractional free volumes of the polymer films were determined to be approximately 1.39 g/cm3 and 0.22, respectively. The polymer films were quite tough with an elastic modulus of up to 6.5 GPa and a tensile strength of up to 200 MPa, and their glass transition temperature reached 366 degrees C. A colorless and transparent film with a transmittance of 84.8% at 440 nm and a low yellow index of 1.77 was obtained by adding a bluing agent. | Kim, Young-Rae; Lee, Jineun; Kim, Heesang; Jeon, Yooseop; Kim, Young-Su; Seong, Hoon-Moh; Kwak, Giseop | Kyungpook Natl Univ, Dept Polymer Sci & Engn, Polymer Nanomat Lab, Buk Ku, Deagu 702701, South Korea; Hansol Chem Co Ltd, Wonju 565904, Jeonrabug Do, South Korea | ; , Giseop/M-8370-2018 | 57207443008; 57226333374; 57226091356; 57969355600; 57969590600; 57970755800; 17137322300 | gkwak@knu.ac.kr; | ACS APPLIED POLYMER MATERIALS | ACS APPL POLYM MATER | 2637-6105 | 4 | 12 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.79 | 2025-06-25 | 9 | 9 | polyamideimide; transparent film; acid removal; bluing agent; elastic modulus | FLEXIBLE DISPLAYS; PROPYLENE-OXIDE; COLORLESS | acid removal; bluing agent; elastic modulus; polyamideimide; transparent film | Elastic moduli; Glass transition; Polycondensation; Polymer films; Semiconducting films; Tensile strength; Acid removal; Amidation; Bluing agent; Dimethylacetamide; High temperature polycondensation; Imidization; Mechanically robust; Polycondensations; Propylene oxide; Transparent films; Polyamideimides | English | 2022 | 2022-12-09 | 10.1021/acsapm.2c01676 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | New semi-analytical solutions to the radial advection-dispersion equation for solute transport in a transient divergent radial flow | Solute transport through radial advection-dispersion is a common phenomenon in many applications, such as aquifer decontamination, heat exchange for geothermal exploration, and tracer testing. Numerous analytical solutions to the problem of tracer testing in a radially divergent flow field are available for fitting breakthrough curves. However, all of these analytical solutions assume non-uniform flow velocity based on Thiem's solution, which varies only spatially, not temporally. Although an injection well with a constant injection rate in a tracer test causes both spatial and temporal variability of the radial flow field, previous analytical studies have employed a steady-state groundwater flow solution, i.e. Thiem's solution, to derive analytical solutions for breakthrough curves or spatial concentration distribution curves. To the best of our knowledge, no analytical solution to the radial advection-dispersion equation under spatially and temporally variable flow conditions driven by injection at a constant rate is currently available. Here, we propose a novel semi-analytical solution for describing solute transport in spatially and temporally variable flow induced by an injection well with a constant injection rate. We find that, above certain threshold values of dimensionless parameters related to aquifer flow properties, solute transport parameters, and the in-jection rate, the differences between previous analytical strategies our proposed semi-analytical solution are negligible. These threshold values tend to increase more sharply with an instantaneous injection source than a continuous injection source. In other words, it is more difficult for an instantaneous injection source to reach the condition where the difference between our approach and previous ones is negligible than for a continuous injection source type. Our findings clarify when existing analytical solutions can be reasonably used for parameter estimation through fitting of the breakthrough curve to field data and when the proposed semi -analytical solution is a better alternative. | Suk, Heejun; Chen, Jui-Sheng; Han, Weon Shik; Park, Eungyu | Korea Inst Geosci & Mineral Resources, Daejeon 34132, South Korea; Natl Cent Univ, Grad Inst Appl Geol, Taoyuan City 320, Taiwan; Yonsei Univ, Dept Earth Syst Sci, 50, Yonsei ro, Seoul 03722, South Korea; Kyungpook Natl Univ, Dept Geol, 80 Daehak ro, Daegu 41566, South Korea; Natl Cent Univ, Grad Inst Appl Geol, Taoyuan City 32001, Taiwan | suk, heejun/A-3212-2015; Chen, Jui Sheng/GQH-3954-2022 | 23996203400; 7501893250; 57226420125; 23995577700 | juischen@ncu.edu.tw; | ADVANCES IN WATER RESOURCES | ADV WATER RESOUR | 0309-1708 | 1872-9657 | 167 | SCIE | WATER RESOURCES | 2022 | 4.7 | 18.0 | 0.83 | 2025-06-25 | 7 | 8 | Divergent radial flow; New semi-analytical solution; Tracer test; Transient flow | LAPLACE TRANSFORM SOLUTION; POWER-SERIES SOLUTION; TRACER TESTS; GROUNDWATER-FLOW; REACTION NETWORK; INJECTION WELL; AQUIFER; BOUNDARY; FRACTURE; DERIVATION | Divergent radial flow; New semi-analytical solution; Tracer test; Transient flow | Advection; Curve fitting; Dispersions; Flow fields; Flow velocity; Geothermal fields; Groundwater flow; Groundwater resources; Injection (oil wells); Radial flow; Radioactive tracers; Advection-dispersion equation; Breakthrough curve; Divergent radial flow; Divergents; Injection rates; Injection wells; New semi-analytical solution; Semi-analytical solution; Tracer tests; Transient flow; analytical method; dispersion; fluid injection; groundwater flow; radial flow; solute transport; transient flow; Aquifers | English | 2022 | 2022-09 | 10.1016/j.advwatres.2022.104283 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | One-Shot Synthesis of Thermoplastic Polyurethane Based on Bio-Polyol (Polytrimethylene Ether Glycol) and Characterization of Micro-Phase Separation | In this study, a series of bio-based thermoplastic polyurethane (TPU) was synthesized via the solvent-free one-shot method using 100% bio-based polyether polyol, prepared from fermented corn, and 1,4-butanediol (BDO) as a chain extender. The average molecular weight, degree of phase separation, thermal and mechanical properties of the TPU-based aromatic (4,4-methylene diphenyl diisocyanate: MDI), and aliphatic (bis(4-isocyanatocyclohexyl) methane: H12MDI) isocyanates were investigated by gel permeation chromatography, Fourier transform infrared spectroscopy, atomic force microscopy, X-ray Diffraction, differential scanning calorimetry, dynamic mechanical thermal analysis, and thermogravimetric analysis. Four types of micro-phase separation forms of a hard segment (HS) and soft segment (SS) were suggested according to the [NCO]/[OH] molar ratio and isocyanate type. The results showed (a) phase-mixed disassociated structure between HS and SS, (b) hydrogen-bonded structure of phase-separated between HS and SS forming one-sided hard domains, (c) hydrogen-bonded structure of phase-mixed between HS, and SS and (d) hydrogen-bonded structure of phase-separated between HS and SS forming dispersed hard domains. These phase micro-structure models could be matched with each bio-based TPU sample. Accordingly, H-BDO-2.0, M-BDO-2.0, H-BDO-2.5, and M-BDO-3.0 could be related to the (a)-form, (b)-form, (c)-form, and (d)-form, respectively. | Jung, Yang-Sook; Lee, Sunhee; Park, Jaehyeung; Shin, Eun-Joo | Dong A Univ, Dept Organ Mat & Polymer Engn, Busan 49315, South Korea; Kyungpook Natl Univ, Dept Biofibers & Mat Sci, Daegu 41566, South Korea; Dong A Univ, Dept Fash Design, Busan 49315, South Korea | 57802210500; 57207067693; 55566554000; 55984568700 | parkj@knu.ac.kr;sejoo6313@dau.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 20 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 1.79 | 2025-06-25 | 24 | 25 | thermoplastic polymer; bio-based polyurethane; polymerization; biomaterials; micro-phase separation | MULTIPLE MELTING ENDOTHERMS; BLOCK CONTENT POLYURETHANE; SEGMENTED COPOLYMERS; SYNCHROTRON SAXS; MOLECULAR-WEIGHT; CHAIN EXTENDER; MORPHOLOGY; ELASTOMERS; ORIGIN; MICROSTRUCTURE | bio-based polyurethane; biomaterials; micro-phase separation; polymerization; thermoplastic polymer | Alcohols; Differential scanning calorimetry; Ethers; Fourier transform infrared spectroscopy; Gel permeation chromatography; Hydrogen; Hydrogen bonds; Molar ratio; Phase separation; Reinforced plastics; Thermogravimetric analysis; Bio-based; Bio-based polyurethane; Butanediol; Hard domain; Hard segments; Hydrogen-bonded structures; Micro-phase separation; Soft segments; Thermoplastic polymer; Thermoplastic polyurethanes; Polyurethanes | English | 2022 | 2022-10 | 10.3390/polym14204269 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Optimization of Atmospheric Pressure Plasma Jet with Single-Pin Electrode Configuration and Its Application in Polyaniline Thin Film Growth | This study systematically investigated an atmospheric pressure plasma reactor with a centered single pin electrode inside a dielectric tube for depositing the polyaniline (PANI) thin film based on the experimental case studies relative to variations in pin electrode configurations (cases I, II, and III), bluff-body heights, and argon (Ar) gas flow rates. In these cases, the intensified charge-coupled device and optical emission spectroscopy were analyzed to investigate the factors affecting intensive glow-like plasma generation for deposition with a large area. Compared to case I, the intense glow-like plasma of the cases II and III generated abundant reactive nitrogen species (RNSs) and excited argon radical species for fragmentation and recombination of PANI. In case III, the film thickness and deposition rate of the PANI thin film were about 450 nm and 7.5 nm/min, respectively. This increase may imply that the increase in the excited radical species contributes to the fragmentation and recombination due to the increase in RNSs and excited argon radicals during the atmospheric pressure (AP) plasma polymerization to obtain the PANI thin film. This intense glow-like plasma generated broadly by the AP plasma reactor can uniformly deposit the PANI thin film, which is confirmed by field emission-scanning electron microscopy and Fourier transform infrared spectroscopy. | Jung, Eun Young; Park, Choon-Sang; Jang, Hyo Jun; Iqbal, Shahzad; Hong, Tae Eun; Shin, Bhum Jae; Choi, Muhan; Tae, Heung-Sik | Kyungpook Natl Univ, Coll IT Engn, Sch Elect & Elect Engn, Daegu 41566, South Korea; Milligan Univ, Dept Elect Engn, Johnson City, TN 37682 USA; Korea Basic Sci Inst, Div High Technol Mat Res, Busan 46742, South Korea; Sejong Univ, Dept Elect Engn, Seoul 05006, South Korea; Kyungpook Natl Univ, Digital Technol Res Ctr, Daegu 41566, South Korea; Kyungpook Natl Univ, Coll IT Engn, Sch Elect Engn, Daegu 41566, South Korea | Shin, BhumJae/AEV-2572-2022 | 57203199724; 16025295400; 57207956623; 57221800137; 19337084900; 7103027782; 7402093793; 7006298844 | eyjung@knu.ac.kr;cpark@milligan.edu;bs00201@knu.ac.kr;shahzadiqbal@knu.ac.kr;tehong@kbsi.re.kr;hahusbj@sejong.ac.kr;mhchoi@ee.knu.ac.kr;hstae@ee.knu.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 8 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.37 | 2025-06-25 | 4 | 5 | atmospheric pressure plasmas; glow-like discharge; single pin electrode; plasma deposition; PANI thin film | Atmospheric pressure plasmas; Glow-like discharge; PANI thin film; Plasma deposition; Single pin electrode | Argon; Atmospheric pressure; Deposition rates; Electric discharges; Field emission microscopes; Film growth; Film thickness; Flow of gases; Fourier transform infrared spectroscopy; Inductively coupled plasma; Light emission; Nitrogen plasma; Optical emission spectroscopy; Plasma jets; Plasma polymerization; Scanning electron microscopy; Thin films; Atmospheric pressure plasma reactor; Atmospheric pressure plasmas; Electrode configurations; Glow-like discharge; Optimisations; Polyaniline thin films; Radical species; Reactive nitrogen species; Single pin; Single pin electrode; Electrodes | English | 2022 | 2022-04 | 10.3390/polym14081535 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Polymer Concentration and Liquid-Liquid Demixing Time Correlation with Porous Structure of Low Dielectric Polyimide in Diffusion-Driven Phase Separation | Porous polyimide (PI) films are a promising low-k dielectric material for high-frequency data transmission with low signal attenuation. Pores are generated by non-solvent induced phase separation (NIPS) during phase inversion of polymer solution via non-solvent accumulation and solvent diffusion. In this study, aromatic PI was employed as a matrix for NIPS, and the influence of polymer concentration and liquid-liquid demixing time on the morphology of pores in the PI films was investigated. This ensured control over the porous structure of the PI film and provided desirable dielectric properties in a broad frequency range of 100 Hz-30 MHz (1.99 at 30 MHz) and thermal stability (T-d5% > 576 degrees C, T-g > 391 degrees C). This study addresses the effect of polymer concentration and coagulation time on the morphology and physical properties of PI sponge films and provides guidance on the design and optimization of architectures for polymeric materials requiring pore modification. | Kim, Subin; Son, Jaemin; Park, Hwon; Jeong, Euigyung; Nam, Ki-Ho; Bae, Jin-Seok | Kyungpook Natl Univ, Dept Text Syst Engn, Daegu 41566, South Korea | 57221554860; 57578830900; 57577493500; 35885596300; 55553181500; 8857273700 | subin2219@naver.com;woals4272@naver.com;sd9854@naver.com;wolfpack@knu.ac.kr;knam@knu.ac.kr;jbae@knu.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 7 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 1.27 | 2025-06-25 | 14 | 17 | polyimide; non-solvent induced phase separation; porous structure; dielectric constant | FILMS; FABRICATION; MICROSTRUCTURES; MEMBRANES | dielectric constant; non-solvent induced phase separation; polyimide; porous structure | Liquids; Low-k dielectric; Morphology; Permittivity; Phase separation; Polyimides; Polymer films; Solvents; De-mixing; Liquid-liquids; Non-solvent induced phase separation; Non-solvents; Polyimide film; Polymer concentrations; Polymer liquids; Porous structures; Solvent-induced phase separations; Time correlations; Porosity | English | 2022 | 2022-04 | 10.3390/polym14071425 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Self-Similarity and Power-Law Spectra of Polymer Melts and Solutions | Both the Rouse and Doi-Edwards models can be expressed by the relaxation spectra, in the form of power-law functions. The concept of self-similarity has offered a simple solution to many problems in polymer physics. Since the solutions derived from self-similarity are power-law functions, it is essential to check whether the relaxation spectrum of polymeric fluids can be derived by self-similarity. In this study, the power-law spectrum of an unentangled polymer solution is derived by using the self-similarity approach, which does not work for entangled polymeric fluids. Although Baumgaertel et al. (Rheol. Acta 29, 400-408 (1990)) showed that the power-law spectrum can quantitatively describe the linear viscoelasticity of monodisperse polymer melts, regardless of molecular weight, they did not find the universality of the exponent of the spectrum because they found different exponents for different polymers. Under the consideration existing the universality of linear viscoelasticity of polymer melts, this paper deals with the universality of the exponent by employing a new regression algorithm and confirms that the exponent is independent of the type of polymer. | Choi, Jehyeok; Cho, Kwang Soo; Kwon, Mi Kyung | Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea; DGIST, Div Biotechnol, Daegu 42988, South Korea | 57929524700; 56316379300; 57150067700 | polphy@knu.ac.kr;nodamenote@dgist.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 19 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.45 | 2025-06-25 | 6 | 6 | self-similarity; relaxation time spectrum; dimension analysis; linear viscoelasticity | RHEOLOGICAL PROPERTIES; DISCRETE RELAXATION; VISCOELASTIC PROPERTIES; DYNAMICS | dimension analysis; linear viscoelasticity; relaxation time spectrum; self-similarity | Viscoelasticity; Dimension analysis; Edwards model; Linear viscoelasticity; Polymeric fluid; Power law spectrum; Power-law functions; Relaxation spectrum; Relaxation time spectrum; Self-similarities; Similarity law; Polymer melts | English | 2022 | 2022-10 | 10.3390/polym14193924 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Review | Systematic Approach to Mimic Phenolic Natural Polymers for Biofabrication | In nature, phenolic biopolymers are utilized as functional tools and molecular crosslinkers to control the mechanical properties of biomaterials. Of particular interest are phenolic proteins/polysaccharides from living organisms, which are rich in catechol and/or gallol groups. Their strong underwater adhesion is attributed to the representative phenolic molecule, catechol, which stimulates intermolecular and intramolecular crosslinking induced by oxidative polymerization. Significant efforts have been made to understand the underlying chemistries, and researchers have developed functional biomaterials by mimicking the systems. Owing to their unique biocompatibility and ability to transform their mechanical properties, phenolic polymers have revolutionized biotechnologies. In this review, we highlight the bottom-up approaches for mimicking polyphenolic materials in nature and recent advances in related biomedical applications. We expect that this review will contribute to the rational design and synthesis of polyphenolic functional biomaterials and facilitate the production of related applications. | Han, Hyeju; Lee, Kyueui | Kyungpook Natl Univ, Dept Chem, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Green Nano Mat Res Ctr, 80 Daehak Ro, Daegu 41566, South Korea | Lee, Kyueui/ACR-8902-2022; Lee, Kyueui/P-8152-2018 | 57561260500; 56404800600 | kd6886@knu.ac.kr;kyueui@knu.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 7 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.2 | 2025-06-25 | 7 | 8 | polyphenols; biomimetics; biomaterials; biofabrication; biopolymers | CROSS-LINKING; SURFACE MODIFICATION; TANNIC-ACID; MECHANICAL-PROPERTIES; CATECHOL; ADHESIVE; POLYDOPAMINE; CHEMISTRY; HYDROGELS; NANOPARTICLES | biofabrication; biomaterials; biomimetics; biopolymers; polyphenols | Biocompatibility; Biomimetic materials; Biomimetic processes; Biopolymers; Crosslinking; Functional polymers; Medical applications; Phenols; Biofabrication; Biomedical applications; Bottom up approach; Crosslinker; Living organisms; Oxidative polymerization; Phenolic polymer; Phenolics; Polyphenolics; Polyphenols; Biomolecules | English | 2022 | 2022-04 | 10.3390/polym14071282 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Toxicity Study and Quantitative Evaluation of Polyethylene Microplastics in ICR Mice | The production, use, and waste of plastics increased worldwide, which resulted in environmental pollution and a growing public health problem. In particular, microplastics have the potential to accumulate in humans and mammals through the food chain. However, the toxicity of microplastics is not well understood. In this study, we investigated the toxicity of 10-50 mu m polyethylene microplastics following single- and 28-day repeated oral administration (three different doses of microplastics of 500, 1000, and 2000 mg/kg/day) in ICR mice. For the investigation, we administered the microplastics orally for single- and 28-day repeated. Then, the histological and clinical pathology evaluations of the rodents were performed to evaluation of the toxicity test, and Raman spectroscopy was used to directly confirm the presence of polyethylene microplastics. In the single oral dose toxicity experiments, there were no changes in body weight and necropsy of the microplastics-treated group compared with that of controls. However, a histopathological evaluation revealed that inflammation from foreign bodies was evident in the lung tissue from the 28-day repeated oral dose toxicity group. Moreover, polyethylene microplastics were detected in the lung, stomach, duodenum, ileum, and serum by Raman spectroscopy. Our results corroborated the findings of lung inflammation after repeated oral administration of polyethylene microplastics. This study provides evidence of microplastic-induced toxicity following repeated exposure to mice. | Lee, Sijoon; Kang, Kyung-Ku; Sung, Soo-Eun; Choi, Joo-Hee; Sung, Minkyoung; Seong, Keum-Yong; Lee, Sunjong; Yang, Seung Yun; Seo, Min-Soo; Kim, KilSoo | Gyeongbuk Med Innovat Fdn, Preclin Res Ctr, Daegu 41061, South Korea; Gyeongsang Natl Univ, Inst Anim Med, Dept Vet Med, Jinju 52828, South Korea; Pusan Natl Univ, Life & Ind Convergence Inst, Dept Biomat Sci BK Program 21 4, Miryang 50463, South Korea; Korea Inst Ind Technol, Cheonan 31056, South Korea; Kyungpook Natl Univ, Coll Vet Med, 80 Daehakro,Buk Gu, Daegu 41566, South Korea | Yang, Seung/B-5974-2016; Lee, Sijoon/LIC-1291-2024 | 57219164019; 57215079376; 56051194000; 55882556800; 57256838000; 56473397700; 57129404900; 56472969700; 35254332100; 35272034300 | sjlee1013@dgmif.re.kr;kangkk@dgmif.re.kr;sesung@dgmif.re.kr;cjh522@dgmif.re.kr;tjdalsrud27@naver.com;ky.seong0124@gmail.com;sunjong1774@kitech.re.kr;syang@pusan.ac.kr;msseo@dgmif.re.kr;kskim728@knu.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 3 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 4.26 | 2025-06-25 | 46 | 57 | microplastics; polyethylene; toxicity evaluation; quantitative evaluation | POLYSTYRENE MICROPLASTICS; WATER; CONTAMINATION; PARTICLES; POLLUTION; MUSSELS; FISH | Microplastics; Polyethylene; Quantitative evaluation; Toxicity evaluation | Biological organs; Mammals; Microplastic; Pathology; Polyethylenes; Raman spectroscopy; Body weight; Environmental pollutions; Food chain; Foreign bodies; Microplastics; Oral administration; Oral dose; Quantitative evaluation; Toxicity evaluation; Toxicity test; Toxicity | English | 2022 | 2022-02 | 10.3390/polym14030402 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Two-Dimensional Nuclear Magnetic Resonance Analysis of Hydrogen-Bond Formation in Thermosetting Crystalline Urea-Formaldehyde Resins at a Low Molar Ratio | The unique phenomenon of crystalline domain formation in thermosetting crystalline urea-formaldehyde (UF) resins at low formaldehyde-to-urea (F/U) molar ratios is responsible for their poor adhesion as wood adhesives. The crystalline domains are apparently formed by hydrogen bonds between linear molecules in UF resins at low molar ratios. Clear evidence for the formation of linear molecules and subsequent hydrogen bonds in the UF resins using two-dimensional nuclear magnetic resonance (2D NMR) spectroscopy is reported for the first time through our study. One-dimensional and 2D NMR spectroscopies were used to compare the short-range and long-range correlations between hydrogen, carbon, and nitrogen atoms in UF resin polymers prepared with high and low F/U molar ratios (1.6 and 1.0). Complete signal assignments for various structural units and interconnections among UF resin species are reported. The results revealed that the second addition of urea at the final step of UF resin synthesis split several linkages, such as branched methylene ether, oxymethylene (or acetal), branched hydroxymethyl urea, or uron, resulting in linear molecular structures, and showed the formation of hydrogen bonds in UF resins at the low molar ratio. | Wibowo, Eko Setio; Park, Byung-Dae | Kyungpook Natl Univ, Dept Wood & Paper Sci, Daegu 41566, South Korea | Park, Byung-Dae/ABB-1934-2020; Wibowo, Eko/AAL-5888-2021 | 57214910272; 7402834820 | byungdae@knu.ac.kr; | ACS APPLIED POLYMER MATERIALS | ACS APPL POLYM MATER | 2637-6105 | 4 | 2 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;POLYMER SCIENCE | 2022 | 5 | 18.0 | 1.41 | 2025-06-25 | 14 | 16 | UF resins; wood adhesives; crystalline polymer; 2D NMR; hydrogen bonding | CROSS-POLARIZATION; CHEMICAL-SHIFT; SOLID-STATE; CONDENSATION PRODUCTS; NMR-SPECTROSCOPY; C-13; EMISSION; ADHESIVES; SEPARATION; POLYUREA | 2D NMR; crystalline polymer; hydrogen bonding; UF resins; wood adhesives | Adhesives; Formaldehyde; Hydrogen Bonds; Metabolism; Methanol; Molecules; Adhesives; Formaldehyde; Hydrogen bonds; Metabolism; Methanol; Molar ratio; Molecules; Nuclear magnetic resonance; Synthetic resins; Urea; Urea formaldehyde resins; 2-D NMR; 2D-NMR spectroscopy; Crystalline domains; Crystalline polymers; Crystalline urea; Linear molecules; Molar ratio; Two-dimensional nuclear magnetic resonance; Urea-formaldehyde resin; Wood adhesives; Nuclear magnetic resonance spectroscopy | English | 2022 | 2022-02-11 | 10.1021/acsapm.1c01521 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Wavelength-Tunable and Water-Stable Cesium-Lead-Based All-Bromide Nanocrystal-Polymer Composite Films Using Ultraviolet-Curable Prepolymer as an Anti-Solvent | All-inorganic metal halide perovskite nanocrystals (IPeNCs) have become one of the most promising luminescent materials for next-generation display and lighting technology owing to their excellent color expression ability. However, research on IPeNCs with stable blue emission is limited. In this paper, we report stable blue emissive all-bromide IPeNCs obtained through a modified ligand-assisted reprecipitation method using an ultraviolet (UV)-curable prepolymer as the anti-solvent at a low temperature. We found that the blue emission originates from quantum-confined CsPbBr3 nanoparticles formed together with the colorless wide-bandgap Cs4PbBr6 nanocrystals. When the temperature of the prepolymer was increased from 0 to 50 degrees C, CsPbBr3 nanoparticles became larger and more crystalline, thereby altering their emission color from blue to green. The synthesized all-bromide blue-emitting IPeNC solution remained stable for over 1 h. It also remained stable when it was mixed with the green-emitting IPeNC solution. By simply exposing the as-synthesized IPeNC-prepolymer solutions to UV light, we formed water-stable composite films that emitted red, green, blue, and white colors. We believe that this synthetic method can be used to develop color-emitting composite materials that are highly suitable for application as the color conversion films of full-color liquid crystal display backlight systems and lighting applications. | Kim, Wook Hyun; Bae, Jungyoun; Kim, Kang-Pil; Woo, Sungho | Daegu Gyeongbuk Inst Sci & Technol DGIST, Div Energy Technol, 333 Techno Jungang Daero, Daegu 42988, South Korea; Kyungpook Natl Univ, Dept Chem Engn, 80 Daehak Ro, Daegu 41566, South Korea | 55346188400; 57419336200; 8136159100; 7402852149 | shwoo@dgist.ac.kr;bjy9606@knu.ac.kr;kkp@dgist.ac.kr; | POLYMERS | POLYMERS-BASEL | 2073-4360 | 14 | 3 | SCIE | POLYMER SCIENCE | 2022 | 5 | 18.0 | 0.3 | 2025-06-25 | 4 | 4 | cesium halide perovskite nanocrystals; blue emission; CsPbBr3; Cs4PbBr6; UV-curable prepolymer; anti-solvent; reprecipitation | HALIDE PEROVSKITE NANOCRYSTALS; HIGH-STABILITY; QUANTUM DOTS; CSPBX3; BLUE; SILICA; GREEN | Anti-solvent; Blue emission; Cesium halide perovskite nanocrystals; CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub>; Reprecipitation; UV-curable prepolymer | Bromine compounds; Cesium compounds; Color; Composite films; Curing; Lead compounds; Liquid crystal displays; Monomers; Perovskite; Polymer films; Solvents; Temperature; Anti-solvents; Blue-emission; Cesium halide perovskite nanocrystal; Cspbbr3/cs4pbbr6; Halide perovskites; Prepolymers; Re-precipitation; Ultraviolet curable; Ultraviolet-curable; Ultraviolet-curable prepolymer; Nanocrystals | English | 2022 | 2022-02 | 10.3390/polym14030381 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Laparoscopic versus open surgery for left flexure colon cancer: A propensity score matched analysis from an international cohort | Aim Surgical treatment of splenic flexure cancer (SFC) still presents some debated issues, including the role of laparoscopic surgery. The literature is based on small single-centre series, while randomized controlled studies comparing open and laparoscopic treatment for colon cancer exclude SFC. This study aimed to determine the role of laparoscopic surgery in the treatment of SFC, comparing short- and long-term outcomes with open surgery. Method This was an international multicentre retrospective cohort study that analysed patients from 10 tertiary referral centres. From a cohort of 641 cases, 484 patients with Stage I-III SFC submitted to elective surgery with curative intent were selected. After 1:1 propensity score matching, 130 patients in the laparoscopic group (LapGroup) were compared with 130 patients in the open surgery group (OpenGroup). Results After propensity score matching, the two groups were comparable for demographic and clinical parameters. OpenGroup presented a higher incidence of overall (P = 0.02) and surgery-related complications (P = 0.05) but a similar rate of severe complications (P = 0.75). Length of stay was notably shorter in the LapGroup (P = 0.001). Overall (P = 0.793) as well as cancer-specific survival (P = 0.63) did not differ between the two groups. Conclusions Elective laparoscopic surgery for Stage I-III SFC is feasible and associated with improved short-term postoperative outcomes compared to open surgery. Moreover, laparoscopic surgery appears to provide excellent long-term cancer outcomes. | Pedrazzani, Corrado; Turri, Giulia; Park, Soo Yeun; Hida, Koya; Fukui, Yudai; Crippa, Jacopo; Ferrari, Giovanni; Origi, Matteo; Spolverato, Gaya; Zuin, Matteo; Bae, Sung Uk; Baek, Seong Kyu; Costanzi, Andrea; Maggioni, Dario; Son, Gyung Mo; Scala, Andrea; Rockall, Timothy; Larson, David W.; Guglielmi, Alfredo; Choi, Gyu Seog | Univ Verona, Dept Surg Sci Dent Gynecol & Pediat, Div Gen & Hepatobiliary Surg, Verona, Italy; Kyungpook Natl Univ, Kyungpook Natl Univ Med Ctr, Colorectal Canc Ctr, Sch Med, Daegu, South Korea; Kyoto Univ, Dept Surg, Grad Sch Med, Kyoto, Japan; Mayo Clin, Div Colon & Rectal Surg, Dept Surg, Rochester, MN USA; ASST Grande Osped Metropolitano Niguarda, Dept Gen Surg, Niguarda Hosp, Milan, Italy; Univ Padua, Dept Surg Oncol & Gastroenterol, Surg Clin Sect 1, Padua, Italy; Keimyung Univ, Sch Med, Dept Surg, Div Colorectal Surg, Daegu, South Korea; Dongsan Med Ctr, Daegu, South Korea; ASST Monza, Desio Hosp, Gen Surg 3, Desio, Italy; Pusan Natl Univ, Pusan Natl Univ Yangsan Hosp, Sch Med, Dept Surg, Yangsan, South Korea; Royal Surrey NHS Fdn Trust, Dept Colorectal & Minimal Access Surg, Guildford, Surrey, England | ; Turri, Giulia/AAA-8971-2021; Ferrari, Giovanni/AAK-1893-2020; Costanzi, Andrea/AAA-2395-2021; Bae, Sung/W-1915-2019; Spolverato, Gaya/M-1965-2017; Crippa, Jacopo/AAC-5116-2019; 손, 경모/HZJ-3181-2023 | 6602542489; 57203867916; 40561578300; 16301465700; 56581181500; 56559681900; 57217432305; 56097135900; 41862392700; 57215969229; 55748167300; 25930840200; 23024248800; 23025096100; 35741980300; 57200971399; 6701736878; 8148482100; 7004542428; 8058759100 | corrado.pedrazzani@univr.it; | COLORECTAL DISEASE | COLORECTAL DIS | 1462-8910 | 1463-1318 | 24 | 2 | SCIE | GASTROENTEROLOGY & HEPATOLOGY;SURGERY | 2022 | 3.4 | 18.1 | 0.11 | 2025-06-25 | 3 | 1 | colon cancer; laparoscopy; left flexure; prognosis; splenic flexure | SHORT-TERM OUTCOMES; EXTENDED RIGHT COLECTOMY; SPLENIC FLEXURE; CLINICOPATHOLOGICAL CHARACTERISTICS; SURGICAL-TREATMENT; CLASICC TRIAL; RESECTION; CARCINOMA; TRANSVERSE; TUMORS | colon cancer; laparoscopy; left flexure; prognosis; splenic flexure | Cohort Studies; Colectomy; Colonic Neoplasms; Humans; Laparoscopy; Postoperative Complications; Propensity Score; Retrospective Studies; Treatment Outcome; aged; Article; cancer specific survival; cancer staging; clinical feature; cohort analysis; colon cancer; controlled study; demography; disease severity; elective surgery; female; human; incidence; intermethod comparison; laparoscopic surgery; length of stay; long term care; major clinical study; male; multicenter study; open surgery; outcome assessment; patient selection; population structure; postoperative complication; propensity score; recurrent disease; retrospective study; sample size; splenic flexure; tertiary care center; treatment outcome; adverse event; colon resection; colon tumor; laparoscopy; postoperative complication; propensity score | English | 2022 | 2022-02 | 10.1111/codi.15962 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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