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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 | Secretoneurin, a Neuropeptide, Enhances Bone Regeneration in a Mouse Calvarial Bone Defect Model | Background: This study investigates the effects of a neuropeptide, secretoneurin (SN), on bone regeneration in an experimental mouse model. Methods: The effects of SN on cell proliferation, osteoblast marker genes expression, and mineralization were evaluated using the CCK-8 assay, quantitative reverse transcriptase polymerase chain reaction (RT-PCR), and alizarin red S staining, respectively. To examine the effects of SN on bone regeneration in vivo, bone defects were created in the calvaria of ICR mice, and 0.5 or 1 mu g/ml SN was applied. New bone formation was analyzed by micro-computed tomography (micro-CT) and histology. New blood vessel formation was assessed by CD34 immunohistochemistry. Results: SN had no significant effect on proliferation and mineralization of MC3T3-E1 cells. However, SN partially induced the gene expression of osteoblast differentiation markers such as runt-related transcription factor 2, alkaline phosphatase, collagen type I alpha 1, and osteopontin. A significant increase of bone regeneration was observed in SN treated calvarial defects. The bone volume (BV), BV/tissue volume, trabecular thickness and trabecular number values were significantly increased in the collagen sponge plus 0.5 or 1 mu g/ml SN group (p < 0.01) compared with the control group. Histologic analysis also revealed increased new bone formation in the SN-treated groups. Immunohistochemical staining of CD34 showed that the SN-treated groups contained more blood vessels compared with control in the calvarial defect area. Conclusion: SN increases new bone and blood vessel formation in a calvarial defect site. This study suggests that SN may enhance new bone formation through its potent angiogenic activity. | Assefa, Freshet; Lim, Jiwon; Kim, Ju-Ang; Ihn, Hye Jung; Lim, Soomin; Nam, Sang-Hyeon; Bae, Yong Chul; Park, Eui Kyun | Kyungpook Natl Univ, Sch Dent, Dept Oral Pathol & Regenerat Med, 2177 Dalgubeol Daero, Daegu 41940, South Korea; Kyungpook Natl Univ, Cell & Matrix Res Inst, Daegu 41944, South Korea; Kyungpook Natl Univ, Sch Dent, Dept Oral Anat & Neurobiol, Daegu 41940, South Korea | ; Kim, Ju Ang/LWI-0914-2024 | 57219236123; 13404844200; 55991948000; 56421724400; 57202647759; 57209806061; 56377838800; 37071072400 | epark@knu.ac.kr; | TISSUE ENGINEERING AND REGENERATIVE MEDICINE | TISSUE ENG REGEN MED | 1738-2696 | 2212-5469 | 18 | 2 | SCIE | CELL & TISSUE ENGINEERING;ENGINEERING, BIOMEDICAL | 2021 | 4.451 | 40.3 | 0.61 | 2025-07-30 | 8 | 9 | Neuropeptide; Secretoneurin; Bone regeneration; Bone | SUBSTANCE-P; SECRETOGRANIN-II; IN-VITRO; ANGIOGENESIS; DIFFERENTIATION; PROMOTES; CELLS; REPAIR; VEGF; PROTEINS | Bone; Bone regeneration; Neuropeptide; Secretoneurin | Animals; Bone Regeneration; Mice; Mice, Inbred ICR; Neuropeptides; Osteogenesis; Secretogranin II; Skull; X-Ray Microtomography; Blood; Blood vessels; Cell proliferation; Collagen; Computerized tomography; Defects; Mammals; Mineralogy; Phosphatases; Polymerase chain reaction; Tissue regeneration; Transcription; alkaline phosphatase; CD34 antibody; collagen type 1; osteopontin; secretoneurin; transcription factor RUNX2; neuropeptide; secretogranin II; secretoneurin; ALkaline phosphatase; Histologic analysis; Immunohistochemical staining; Immunohistochemistry; Micro computed tomography (micro-CT); Osteoblast differentiation; Reverse-transcriptase polymerase chain reactions; Trabecular thickness; angiogenesis; animal cell; animal experiment; animal model; animal tissue; Article; bone defect; bone marrow derived mesenchymal stem cell; bone mineralization; bone regeneration; bone volume; bone volume fraction; calvaria; cell culture; cell differentiation; cell proliferation; controlled study; gene expression; histology; immunohistochemistry; in vivo study; MC3T3-E1 cell line; micro-computed tomography; mouse; nonhuman; ossification; osteoblast; priority journal; real time reverse transcription polymerase chain reaction; staining; trabecular number; trabecular thickness; animal; bone development; diagnostic imaging; Institute for Cancer Research mouse; physiology; skull; Bone | English | 2021 | 2021-04 | 10.1007/s13770-020-00304-1 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | High Breakdown Voltage and Low-Current Dispersion in AlGaN/GaN HEMTs With High-Quality AlN Buffer Layer | We have successfully grown AlGaN/GaN high electron mobility transistor (HEMT) structure on the high-quality undoped thick AlN buffer layer with large band offset to replace the conventionalhigh-resistivityGaN buffer layer. The AlGaN/GaN HEMT fabricated on this AlN buffer layer exhibits low OFF-state leakage current with high I-ON/I-OFF of similar to 10(6) due to enhanced confinement of the electrons in the 2-D electron gas (2-DEG) channel. The undoped AlN buffer layer is responsible for suppressing the trapping effects to greatly reduce the current dispersion in pulsed I-D-V-D characteristics, which is hardly avoided in conventional deep acceptor-doped GaN buffer layer. The device also demonstrates high breakdown voltage of 2154 V with very high figure of merit (FOM) of similar to 1.8 GV(2-1)cm(-2), one of the highest ever reported, suggesting that the AlGaN/GaN-based HEMTs with AlN buffer layer are promising for high-performance RF and power applications. | Kim, Jeong-Gil; Cho, Chuyoung; Kim, Eunjin; Hwang, Jae Seok; Park, Kyung-Ho; Lee, Jung-Hee | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Korea Adv Nano Fab Ctr KANC, Suwon 443270, South Korea | 57203324876; 23972116700; 57222322113; 57211608210; 7408064913; 57196140713 | jlee@ee.knu.ac.kr; | IEEE TRANSACTIONS ON ELECTRON DEVICES | IEEE T ELECTRON DEV | 0018-9383 | 1557-9646 | 68 | 4 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;PHYSICS, APPLIED | 2021 | 3.221 | 40.4 | 3.86 | 2025-07-30 | 60 | 63 | AlGaN/GaN; AlN buffer; BV2/R-ON; high electron mobility transistor (HEMT); SP | AlGaN/GaN; AlN Buffer; BV<sub>2</sub>/R<sub>ON</sub>; high electron mobility transistor (HEMT); SP | Aluminum gallium nitride; Aluminum nitride; Dispersions; Electron gas; Gallium nitride; High electron mobility transistors; III-V semiconductors; AlGaN/GaN high electron mobility transistors; AlN buffer layers; Current dispersions; Figure of merit (FOM); GaN buffer layers; High breakdown voltage; Off-state leakage current; Power applications; Buffer layers | English | 2021 | 2021-04 | 10.1109/ted.2021.3057000 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Sub-30-nm In0.8Ga0.2As Composite-Channel High-Electron-Mobility Transistors With Record High-Frequency Characteristics | We present sub-30-nm In0.8Ga0.2As composite-channel high-electron-mobility transistors (HEMTs) with outstanding dc and high-frequency characteristics. We adopted a composite-channel design with an In0.8Ga0.2As core layer, which led to superior carrier transport properties such as a Hall mobility (mu(nHₐₗₗ) ) of 13500 cm(2)/V.s . The device with L-g = 19 nm exhibited an excellent combination of dc and RF properties, including R-ON = 271-mu m , g(mₘₐₓ) = 2.8 mS/mu m , and f(T)/f(max) = 738/492 GHz. To understand the physical origin of such an excellent combination of dc and RF responses, we analyzed the effective mobility (mu(nₑff)) and delay time for both long- and short-L-g devices, revealing a very high mu(nₑff) value of 13200 cm(2)/V.s and an average velocity under the gate (v(avg)) of 6.2 x 10(7) cm/s. We also studied the impact of the electrostatic integrity of the device, finding that the intrinsic output conductance (g(oi)) played a role in determining f(T) and f(max) in short-L-g HEMTs. | Jo, Hyeon-Bhin; Yun, Seung-Won; Kim, Jun-Gyu; Baek, Ji-Min; Lee, In-Geun; Kim, Dae-Hyun; Kim, Tae-Woo; Kim, Sang-Kuk; Yun, Jacob; Kim, Ted; Tsutsumi, Takuya; Sugiyama, Hiroki; Matsuzaki, Hideaki | Kyungpook Natl Univ, Elect & Elect Engn Dept, Daegu 41566, South Korea; Univ Ulsan, Elect Engn Dept, Ulsan 41610, South Korea; QSI, Cheonan Si 31044, South Korea; NTT Corp, NTT Device Technol Labs, Atsugi, Kanagawa 2430198, Japan | Kim, Yong/H-6157-2013; Sugiyama, Hiroki/P-6476-2019; Kim, Ted/JDW-4515-2023; Jo, Hyeon Bhin/HLW-9536-2023; Kim, Junghwan/AAQ-9204-2021 | 57202871742; 57221602680; 57203326312; 57189694750; 37016357200; 57212363794; 57203495132; 57221604960; 57221602607; 57221599265; 37007126500; 35417698400; 7202461821 | dae-hyun.kim@ee.knu.ac.kr; | IEEE TRANSACTIONS ON ELECTRON DEVICES | IEEE T ELECTRON DEV | 0018-9383 | 1557-9646 | 68 | 4 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;PHYSICS, APPLIED | 2021 | 3.221 | 40.4 | 1.09 | 2025-07-30 | 14 | 17 | Cutoff frequency; high-electron-mobility transistor (HEMT); In0.8Ga0.2As; maximum oscillation frequency; short-channel effects (SCEs) | Cutoff frequency; high-electron-mobility transistor (HEMT); Ina As; maximum oscillation frequency; short-channel effects (SCEs) | Electron mobility; Hall mobility; Hole mobility; Average velocity; Composite channel; Core layers; Effective mobilities; Electrostatic integrity; High electron mobility transistor (HEMTs); High frequency characteristics; Output conductance; High electron mobility transistors | English | 2021 | 2021-04 | 10.1109/ted.2020.3045958 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Combustion Using Oxygen-Lancing in a Reheating Furnace | Fuel economy has been a primary issue in the steel industry because it uses large amounts of energy, such as the gaseous fuel of byproduct gas. Furthermore, reheating throughput capacity has been a key issue because it can improve furnace efficiency, leading to fuel economy. Many attempts have tried improving fuel economy using oxygen in a reheating furnace. Oxygen-lancing technology was developed to increase fuel economy and maintain the same level of NOx concentration simultaneously. Mechanisms that inject oxygen into flames locally causing flame quenching and at the same time suppressing the increase in NOx concentration due to recirculation of reheating furnace-burned gases are key to this study. Various oxygen concentrations for its lancing were used to investigate its effects on furnace temperature and NOx concentration in a test furnace. It was determined that 30% of oxygen was optimal regarding fuel economy and NOx concentrations. Oxygen was injected into the flame using two lancing pipes at 11 degrees in a design capacity of 125 MW. The results showed a 3-5% increase in fuel economy and the same level of NOx concentration in the furnace. | Lee, Cheol Woo; Kim, In Su; Hong, Jung Goo | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Hyundai Steel, Environm & Energy Planning Team, Dangjin Si 31719, Chungnam, South Korea | 57223855784; 57198915574; 24576652200 | jghong70@knu.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 26 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 0 | 2025-07-30 | 1 | 1 | MILD COMBUSTION; TEMPERATURE; SIMULATION; GAS | English | 2021 | 2021-07-06 | 10.1021/acsomega.1c01564 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||||
| ○ | Article | Deep-Sintered Copper Tracks for Thermal Oxidation Resistance Using Large Pulsed Electron Beam | Thermal oxidation resistance is an important property in printed electronics for sustaining electrical conductivity for long time and/or under harsh environments such as high temperature. This study reports the fabrication of copper nanoparticles (CuNPs)-based conductive tracks using large pulsed electron beam (LPEB) by irradiation on CuNPs to be sintered. With an acceleration voltage of 11 kV, the LPEB irradiation induced deep-sintering of CuNPs so that the sintered CuNPs exhibited bulk-like electrical conductivity. Consequently, the sintered Cu tracks maintained high electrical conductivity at 220 °C without using any thermal oxidation protection additive, such as silver, carbon nanotube, and graphene. In contrast, the films irradiated with an acceleration voltage of 8 kV and irradiated by intense pulsed light (IPL) showed fast oxidation characteristics and a corresponding reduction of electrical conductivities under high temperatures owing to a thin sintered layer. The performance of highly thermal oxidation-resistant Cu films sintered by LPEB irradiations was demonstrated through the device performance of a Joule heater. © 2021 The Authors. Published by American Chemical Society. | Hwang, Yunjae; Kim, Jisoo; Yim, Changyong; Park, Hyung Wook | School of Mechanical and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil, 50, Eonyang-eup, Ulju-gun, Ulsan, 44919, South Korea; Department of Advanced Science and Technology Convergence, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, South Korea, Department of Precision Mechanical Engineering, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, South Korea; Department of Advanced Science and Technology Convergence, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, South Korea, School of Nano and Materials Science and Engineering, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, South Korea; School of Mechanical and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil, 50, Eonyang-eup, Ulju-gun, Ulsan, 44919, South Korea | 57226367879; 57192647685; 36877182000; 55537550000 | hwpark@unist.ac.kr;js.kim@knu.ac.kr;cy.yim@knu.ac.kr; | ACS Omega | ACS OMEGA | 2470-1343 | 2470-1343 | 6 | 29 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 0.19 | 2025-07-30 | 5 | English | Final | 2021 | 10.1021/acsomega.1c02475 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | ○ | Article | Effect of the Oxygen Concentration and Temperature on Thermal Decomposition of N2O in an Inert Gas | Nitrous oxide (N2O) is one of the greenhouse gases that contribute to global warming. But, there are few methods for controlling N2O directly. It is essential to reduce N2O to solve environmental problems. In this study, we investigate the O-2 concentration dependence of N2O decomposition under an argon-based gas mixture in a high-temperature thermal reactor. The gas concentrations are calculated using CHEMKIN. The results confirm that more N2O is converted to N-2 or NO at lower O-2 concentrations. Therefore, the conversion process is hindered by increasing the O-2 concentration. We propose a modified parameter of N2O decomposition, and it is employed in the CHEMKIN calculations. With the modified parameter, the experimental results are in a similar tendency to the calculated results. | Yun, Jae Geun; Lee, Han Min; Baik, Gwang Yeol; Kim, Ji Yeop; Lee, Sang Ji; Jeon, Min Kyu; Keel, Sang In; Hong, Jung Goo | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Korea Inst Machinery & Mat, Dept Environm Machinery, Daejeon 34103, South Korea | 57223914011; 57223914555; 57222529575; 57222525959; 57221453424; 57347105200; 7004122543; 24576652200 | jghong70@knu.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 46 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 0.31 | 2025-07-30 | 7 | 7 | English | 2021 | 2021-11-23 | 10.1021/acsomega.1c03365 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||||
| ○ | ○ | Article | Effects of Y-Jet Nozzle Mixing Chamber Length and the GLR on Spatial Asymmetric Spray | The Y-jet nozzle is simpler to design than other twin-fluid nozzles and has various advantages such as having a wide turn-down ratio. For this reason, it is mainly used for industrial boilers and combustion. The Y-jet nozzle comprises liquid and assist gas supply ports, a mixing chamber, where two fluids (liquid and the assist gas) are mixed, and an exit orifice. The time it takes to mix the two fluids in the mixing chamber depends on the length of the chamber, which determines the spray and particulate properties. Therefore, the mixing chamber is one of the most important factors when designing the Y-jet nozzle. The gas to liquid mass flow rate ratio (GLR) is an important variable that affects the spray characteristics of the Y-jet nozzle. In this work, a laboratory-scale Y-jet nozzle spray experimental setup was developed to perform spray experiments. In particular, we observe the spray properties in the front and right directions to observe spatial spray properties. Significant results were obtained depending on the length of the mixing chamber, the spray pattern, and the Sauter mean diameter according to the GLR. We found that a mixing chamber with longer length reduces the effect of asymmetric spray and confirm that the central axis of spray is more stable. | Lee, Sang Ji; Kim, Ji Yeop; Hong, Jung Goo | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | 57221453424; 57222525959; 24576652200 | jghong70@knu.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 26 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 0.19 | 2025-07-30 | 5 | 5 | PERFORMANCE | English | 2021 | 2021-07-06 | 10.1021/acsomega.1c01334 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||||
| ○ | ○ | Article | Enhanced Polymerization and Surface Hardness of Colloidal Siloxane Films via Electron Beam Irradiation | Electron beam (EB) curing is a foldable hard coating process and has attracted significant research attention in the field of flexible electronic devices. In this study, we report a method for enhancing material surface hardness with low-energy EB curing in a short time. The low-energy EB improved the coating hardness of films by inducing cross-linking polymerization of the silicon-containing monomer. The hardness of the cured coating layer was measured as 3 H using a pencil hardness tester, and the transparency of the coating was higher than 90%. Owing to a series of cross-linking reactions between Si-O-C and Si-OH groups under EB curing and the formation of Si-Si bonds, the cured layer exhibited remarkable durability in the 100000-flexible cycle test. Additionally, the natural oxidation of the C-O groups on the surface of the coating formed carboxyl groups that improved the hydrophilic properties of the coating layer. To the best of our knowledge, this is the first study to propose that the hardness of polyethylene terephthalate films can be improved using low-energy EBs to rapidly cure silicon-containing coatings. Our results provide a novel and commercially viable approach for improving the hardness of touch screens and foldable displays. | Ma, Junfei; Kim, Ji-Hyeon; Na, Jaehun; Min, Junki; Lee, Ga-Hyun; Jo, Sungjin; Kim, Chang Su | Korea Inst Mat Sci KIMS, Dept Nanobio Convergence, Chang Won 51508, South Korea; Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, Daegu 41566, South Korea; Gimhae Ind Promot & Biomed Fdn, Gimhae 50969, Gyeongnam, South Korea | Kim, Donghee/C-4288-2013 | 57207769424; 57210338058; 57760219900; 57223922599; 57215123354; 7101724027; 57201346735 | sungjin@knu.ac.kr;cskim1025@kims.re.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 20 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 0.62 | 2025-07-30 | 14 | 14 | CELLULOSE NANOCRYSTALS; THIN-FILMS; SI; NANOPARTICLES; GREEN; FUNCTIONALIZATION; FABRICATION; NANOWIRES; COATINGS; SILICON | English | 2021 | 2021-05-25 | 10.1021/acsomega.1c01429 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||
| ○ | ○ | Article | Physicochemical Property Investigations of Perovskite-Type Layer Crystals [NH3(CH2)nNH3]CdCl4 (n=2, 3, and 4) as a Function of Length n of CH2 | Hybrid perovskites have potential applications in several electrochemical devices such as supercapacitors, batteries, and fuel cells. Here, the thermal stabilities as a function of the length n of the CH2 groups in [NH3(CH2)(n)NH3]CdCl4 (n = 2, 3, and 4) crystals were considered by TGA and DTA. The structural characteristics and molecular dynamics were studied by MAS and static NMR experiments. A comparison of spin-lattice relaxation times indicated that the organic cation containing H-1 and C-13 was significantly more flexible than the inorganic anion containing Cd-113. The flexibility of H-1 increased with an increase in the length of CH2 in the carbon chain, resulting in a decrease in the activation energy (Ea) of H-1. The Ea of C-13 at n = 3 and 4 was more flexible at high temperatures than at low temperatures. In contrast, the Ea of C-13 at n = 2 was more flexible at low temperatures. These results provide insight into the thermal stability and molecular dynamics of these crystals as a function of the length n of CH2 groups in the carbon chain and are expected to facilitate applications. | Lim, Ae Ran; Kim, Sun Ha | Korea Basic Sci Inst, Seoul Western Ctr, Seoul 03759, South Korea; Kyungpook Natl Univ, Dept Chem, Daegu 41566, South Korea; Jeonju Univ, Dept Carbon Convergence Engn, Jeonju 55069, South Korea; Jeonju Univ, Dept Sci Educ, Jeonju 55069, South Korea | 7202659025; 54386953600 | arlim@jj.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 41 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 1.12 | 2025-07-30 | 18 | 18 | STRUCTURAL PHASE-TRANSITIONS; MOTIONS | English | 2021 | 2021-10-19 | 10.1021/acsomega.1c04671 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||||
| ○ | ○ | Article | Precise Microfluidic Luminescent Sensor Platform with Controlled Injection System | Efforts have been devoted to screening various prevalent diseases, such as severe acute respiratory syndrome (SARS) and coronavirus disease 2019 (COVID-19). Real-time polymerase chain reaction (RT-PCR), which is currently the most widely used, has high accuracy, but it requires several facilities and takes a relatively long time to check; so, new testing technology is necessary for a higher test efficiency. A chemiluminescence (CL) sensor is a relatively simple device and suitable as an alternative because it can detect very precise specimens. However, in measurements via CL, the quantitative formulation of reagents that cause color development is important. In the case of mixing using micropipettes, precise analysis is possible, but this technique is limited by uncontrollable errors or deviations in detection amounts. In addition, in using a microfluidic chip to increase field applicability, a syringe pump or other quantification injection tools are required, so problems must be overcome for practical use. Therefore, in this study, a microchip was designed and manufactured to supply a sample of a certain volume by simply blowing air and injecting a sample into the chamber. By utilizing the luminescence reaction of luminol, CuSO4 and H2O2 the performance of the prepared chip was confirmed, and the desired amount of the sample could be injected with a simple device with an error rate of 2% or less. For feasible applications, an experiment was performed to quantitatively analyze thrombin, a biomarker of heart disease. Results demonstrated that biomarkers could be more precisely detected using the proposed microchips than using micropipettes. | Kang, Bongsu; Choi, Sunghak; Kim, Keesung; Jung, Ho-Sup; Kwak, Moon Kyu | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Seoul Natl Univ, Ctr Food & Bioconvergence, Dept Food Sci & Biotechnol, Seoul 08826, South Korea; Seoul Natl Univ, Coll Engn, Res Inst Adv Mat, Seoul 08826, South Korea | Jung, Hosup/AAB-5708-2020; KIM, SUNG MIN/U-5269-2017; Kwak, Moon/AGQ-6058-2022 | 55330925300; 57264013200; 35484342500; 36985354800; 57203947984 | jhs@snu.ac.kr;mkkwak@knu.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 36 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 0.19 | 2025-07-30 | 3 | 3 | HIGH-ASPECT-RATIO; ON-A-CHIP; APTAMER BEACONS; CHEMILUMINESCENCE; POINT; GUANINE; DIAGNOSTICS; TECHNOLOGIES; PHOTORESIST; APTASENSOR | English | 2021 | 2021-09-14 | 10.1021/acsomega.1c03347 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||
| ○ | ○ | Article | Sn-Induced Phase Stabilization and Enhanced Thermal Stability of κ-Ga2O3 Grown by Mist Chemical Vapor Deposition | Tin (Sn)-doped orthorhombic gallium oxide (kappa-Ga2O3) films were grown on (0001) sapphire by mist chemical vapor deposition. It is known that kappa-Ga2O3 is more stable than alpha-Ga2O3 (corundum) but less stable than beta-Ga2O3 (monoclinic). This thermodynamic stability means an optimal growth temperature (T-g) of the kappa-phase (600-650 degrees C) is also in between the two. At first, it was observed that Sn doping induced the kappa-phase during the growth of the beta-phase (T-g = 700 degrees C). Interestingly, Sn could also promote the beta-phase even under the growth condition that strongly favors the alpha-phase (T-g = 450 degrees C). The postgrowth annealing tests at 800-1000 degrees C showed that the thermal stability of the kappa-phase depends on the Sn concentration. The higher the Sn concentration, the more stable the phase. The one with the highest Sn content showed no phase transition from kappa to beta after annealing at 800, 900, and 1000 degrees C for 30 min each. This enhancement of thermal stability promises more reliable high-power and high-frequency devices for which kappa-Ga2O3 is suitable. Although there was no correlation between Sn-induced phase stabilization and the crystal quality, cathodoluminescence revealed that increasing Sn concentration led to the strong suppression of the radiative recombination at 340 nm from the vacancy-related donor-acceptor pairs. This observation suggests that the phase stabilization by Sn could be related to a specific Ga site Sn replaces in the orthorhombic structure. | Kang, Ha Young; Kang, Habin; Lee, Eunhye; Lee, Gyeong Ryul; Chung, Roy Byung Kyu | Kyungpook Natl Univ, Elect Mat Sci & Engn Dept, Daegu 41566, South Korea | 57346636700; 57347277900; 57347278000; 57192425717; 16642183100 | roy.b.chung@knu.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 46 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 1.12 | 2025-07-30 | 22 | 23 | BETA-GA2O3; EPSILON-GA2O3; ALPHA; BETA; CVD | English | 2021 | 2021-11-23 | 10.1021/acsomega.1c05130 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||||
| ○ | ○ | Article | Viscosity Effect on the Electrospray Characteristics of Droplet Size and Distribution | Electrostatic spraying is a method of atomizing a fluid using a high voltage as an atomization auxiliary device, and various spraying modes exist according to experimental parameters and viscosity. A maximum of 11 spray modes were identified according to the changes in the applied voltage and flow rate. To produce fine droplets and a uniform size, which are the advantages of electrostatic spraying, in this experiment, the Sauter mean diameter (SMD) and SMD distribution were evaluated in each spray mode of electrostatic spraying. By comparing the other spray modes with the cone jet mode, it was confirmed that the maximum difference of the SMD was less than 1.5 times and the standard deviation of the rotated and pulsed jets was 2.5 times or more. In the cone shape range, the SMD and SMD distribution according to the applied voltage confirmed that the droplet size was the smallest in the middle of the cone jet mode, and the droplet distribution was also narrow. In the cone jet mode, the droplet size increased linearly with the viscosity and flow rate. In addition, the droplet distribution range was distinctive depending on the type of fluid. In the case of the relationship between the droplet size and current, it was proven that the higher the viscosity, the higher the current value for the same SMD; furthermore, the difference in the current-SMD increase rate was insignificant. Through experiments, this work presents experimental data of SMD, SMD distribution, and current-SMD in electrostatic spray experiments under various conditions. | Kim, Ji Yeop; Lee, Sang Ji; Baik, Gwang Yeol; Hong, Jung Goo | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | 57222525959; 57221453424; 57222529575; 24576652200 | jghong70@knu.ac.kr; | ACS OMEGA | ACS OMEGA | 2470-1343 | 6 | 44 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2021 | 4.132 | 40.5 | 1.18 | 2025-07-30 | 24 | 25 | ELECTROHYDRODYNAMIC ATOMIZATION; NANOPARTICLES; GENERATION; STABILITY; MODE | English | 2021 | 2021-11-09 | 10.1021/acsomega.1c04119 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||||
| ○ | ○ | Article | Parvalbumin-expressing GABAergic interneurons and perineuronal nets in the prelimbic and orbitofrontal cortices in association with basal anxiety-like behaviors in adult mice | Parvalbumin-expressing (PV+) GABAergic interneurons are the principal inhibitory interneurons in the cortex, and a decrease in their number or PV protein expression is associated with changes in brain function. PV+ neurons are surrounded by the perineuronal net (PNN), a reticular extracellular matrix structure surrounding the soma and proximal dendrites. Although the prefrontal cortex is critically involved in anxiety-like behavior, it is not known how cortical PV+ neurons enwrapped with PNN contribute to basal anxiety behavior. To address the issue, we employed Wisteria floribunda agglutinin (WFA) to label the PNN and measured the densities and PV immunofluorescence of PV+ neurons, including those enwrapped with PNN (i.e., PV+WFA+ neurons) in the orbitofrontal (OFC) and prelimbic cortices of mice whose basal anxiety levels had been assessed in the open field test. We found that these densities, but not PV expression according to immunofluorescence intensity, were positively correlated with the percentage of time spent and the distance traveled in the center of an open field. Thus, these data demonstrate that the densities of OFC PV+ and PV+WFA+ neurons are significantly inversely correlated with basal anxiety levels of adult mice measured in the open field test and may represent a target for future anxiolytic therapeutics. | Lee, Juhyun; Lee, Kyungmin | Kyungpook Natl Univ, Lab Behav Neural Circuitry & Physiol, Dept Anat, Brain Sci & Engn Inst,Sch Med, 680 Gukchaebosang Ro, Daegu 41944, South Korea | 57219315346; 57211016316 | irislkm@knu.ac.kr; | BEHAVIOURAL BRAIN RESEARCH | BEHAV BRAIN RES | 0166-4328 | 1872-7549 | 398 | SCIE | BEHAVIORAL SCIENCES;NEUROSCIENCES | 2021 | 3.352 | 40.6 | 1.02 | 2025-07-30 | 14 | 12 | Parvalbumin; Perineuronal net; Orbitofrontal cortex; Prelimbic cortex; Basal anxiety | Basal anxiety; Orbitofrontal cortex; Parvalbumin; Perineuronal net; Prelimbic cortex | Animals; Anxiety; Behavior, Animal; Cell Count; Extracellular Matrix; GABAergic Neurons; Gyrus Cinguli; Interneurons; Male; Mice; Parvalbumins; Plant Lectins; Prefrontal Cortex; Receptors, N-Acetylglucosamine; Staining and Labeling; agglutinin; parvalbumin; 4 aminobutyric acid receptor; n acetylglucosamine receptor; parvalbumin; plant lectin; wisteria lectin; adult; animal experiment; animal tissue; anxiety; Article; chemical labeling; correlational study; GABAergic system; immunofluorescence; interneuron; male; mouse; nonhuman; open field test; orbital cortex; prelimbic cortex; priority journal; protein expression; satellite cell; Wisteria; Wisteria floribunda; animal; animal behavior; anxiety; cell count; cingulate gyrus; extracellular matrix; interneuron; pathophysiology; physiology; prefrontal cortex; staining | English | 2021 | 2021-02-01 | 10.1016/j.bbr.2020.112915 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Comparison of Ossiculoplasty Outcomes Using Different Materials in the Treatment of Chronic Otitis Media | Objective: This study aimed to evaluate success rates after ossicular chain reconstruction using different materials. Study Design: Retrospective cohort study. Setting: Tertiary referral center. Patients: Four hundred forty-three participants who underwent ossiculoplasty at a tertiary medical center were included. Intervention: Ossicular chain reconstruction using five materials: autologous malleus, incus, and cortical bone, as well as Hydroxyapatite (HA) and titanium. Main Outcome Measures: Hearing data were measured 1 day preoperatively and 6 months postoperatively. Successful hearing outcomes were defined by the fulfillment of more than one of the following criteria: postoperative air-bone gap of 20 dB or less, hearing air conduction (AC) gain of 15 dB or more, or postoperative AC hearing less than 30 dB. Results: Preoperative median AC values (95% confidence interval) among participants with malleus, incus, cortical bone, HA, and titanium transplants or prostheses were 50 (39.6-54.6) dB, 51.3 (48.1-51.8) dB, 50 (45.2-52.2) dB, 56.3 (50.9-57.6) dB, and 54.3 (48.5-56.0) dB, respectively (p = 0.092). The success rates in malleus, incus, cortical bone, HA, and titanium were 53.3%, 60.3%, 51.7%, 61.6%, and 69.7%, respectively. Titanium had the highest success rate among the five materials, but the differences between the materials were not statistically significant (p = 0.283). Titanium had highest success rate among the participants with erosive stapes suprastructure or obstructed Eustachian tubes (p = 0.042 for erosive stapes suprastructure and p = 0.010 for obstructed Eustachian tubes). Conclusion: Our study demonstrated that titanium prostheses would be a good alternative for ossiculoplasty in cases wherein autologous material is unavailable, especially in association with unfavorable conditions, such as with the presence of cholesteatoma, erosive stapes suprastructure, edematous middle ear mucosa, and obstructed Eustachian tube. | Jung, Da Jung; Yoo, Myung Hoon; Lee, Kyu-Yup | Kyungpook Natl Univ Hosp, Sch Med, Dept Otorhinolaryngol Head & Neck Surg, 130 Dongdeok Ro,Samduck Dong 2ga, Daegu 41944, South Korea | Lee, Doh Young/GLR-9586-2022 | 57220970862; 22956750000; 22135779500 | kylee@knu.ac.kr; | OTOLOGY & NEUROTOLOGY | OTOL NEUROTOL | 1531-7129 | 1537-4505 | 42 | 1 | SCIE | CLINICAL NEUROLOGY;OTORHINOLARYNGOLOGY | 2021 | 2.619 | 40.7 | 0.76 | 2025-07-30 | 8 | 7 | Hearing result; Ossicular chain reconstruction; Ossiculoplasty | OSSICULAR CHAIN RECONSTRUCTION; TITANIUM; PROSTHESIS; HEARING | Hearing result; Ossicular chain reconstruction; Ossiculoplasty | Humans; Ossicular Prosthesis; Ossicular Replacement; Otitis Media; Retrospective Studies; Treatment Outcome; Tympanoplasty; human; middle ear prosthesis; middle ear reconstruction; otitis media; retrospective study; treatment outcome; tympanoplasty | English | 2021 | 2021-01 | 10.1097/mao.0000000000002847 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Development of a scalable tabletop display using projection-based light field technology | We present a light-field display optical system design, state-of-the-art hardware technology, and computational software that are readily scalable (due to their modular structure) and provide naturally immersive and volumetric display systems. We explain the integration of 72 microprojectors into the tabletop display system. In addition, we used 6 workstations for all images and 18 high-performance graphics processing units. Sophisticated image generation through author tooling and the pixel re-arrangement algorithm in the Unity engine enabled us to produce complete three-dimensional images from the radiant rays of two-dimensional pixels using diffuser screens and microlens arrays. | Shim, Hamong; Lee, Dongkil; Park, Jongbok; Yoon, Seonkyu; Kim, Hoemin; Kim, Kwangsoo; Heo, Daerak; Kim, Beomjun; Hahn, Joonku; Kim, Youngmin; Jang, Wongun | Korea Photon Technol Inst, Spatial Opt Informat R&D Ctr, Gwangju 61007, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu, South Korea; Korea Elect Technol Inst, Hologram Res Ctr, Seoul, South Korea | 56599829400; 37047045400; 59870350700; 14043020000; 57203318815; 57188873326; 57197871664; 57216150371; 10142501600; 57221435538; 13303649900 | wgjang@kopti.re.kr; | JOURNAL OF INFORMATION DISPLAY | J INFORM DISPLAY | 1598-0316 | 2158-1606 | 22 | 4 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY | 2021 | 4.237 | 40.7 | 0.51 | 2025-07-30 | 9 | 9 | Light field display; tabletop display; projection-based light field display; integral imaging; 3D display | 3D display; integral imaging; Light field display; projection-based light field display; tabletop display | Graphics processing unit; Microoptics; Optical systems; Pixels; Program processors; Three dimensional computer graphics; Computational software; Image generations; Light field displays; Micro-lens arrays; Modular structures; Tabletop displays; Three dimensional images; Volumetric display; Field emission displays | English | 2021 | 2021-10-02 | 10.1080/15980316.2021.1965048 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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