2020 연구성과 (63 / 270)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | ○ | Article | The Role of the Histone Methyltransferase EZH2 in Liver Inflammation and Fibrosis in STAM NASH Mice | Non-alcoholic fatty liver disease (NAFLD) is a leading form of chronic liver disease, with few biomarkers and treatment options currently available. Non-alcoholic steatohepatitis (NASH), a progressive disease of NAFLD, may lead to fibrosis, cirrhosis, and hepatocellular carcinoma. Epigenetic modification can contribute to the progression of NAFLD causing non-alcoholic steatohepatitis (NASH), in which the exact role of epigenetics remains poorly understood. To identify potential therapeutics for NASH, we tested small-molecule inhibitors of the epigenetic target histone methyltransferase EZH2, Tazemetostat (EPZ-6438), and UNC1999 in STAM NASH mice. The results demonstrate that treatment with EZH2 inhibitors decreased serum TNF-alpha in NASH. In this study, we investigated that inhibition of EZH2 reduced mRNA expression of inflammatory cytokines and fibrosis markers in NASH mice. In conclusion, these results suggest that EZH2 may present a promising therapeutic target in the treatment of NASH. | Lee, Seul; Woo, Dong-Cheol; Kang, Jeeheon; Ra, Moonjin; Kim, Ki Hyun; Lee, Seoung Rak; Choi, Dong Kyu; Lee, Heejin; Hong, Ki Bum; Min, Sang-Hyun; Lee, Yongjun; Yu, Ji Hoon | Daegu Gyeongbuk Med Innovat Fdn, New Drug Dev Ctr, Daegu 41061, South Korea; Univ Ulsan, Asan Med Ctr, Coll Med, Convergence Med Res Ctr,Asan Inst Life Sci, Seoul 05505, South Korea; Univ Ulsan, Asan Med Ctr, Coll Med, Dept Convergence Med, Seoul 05505, South Korea; Asan Med Ctr, Asan Life Sci Inst, Ctr Bioimaging New Drug Dev, Seoul 05505, South Korea; Hongcheon Inst Med Herb, 101 Yeonbongri, Hongcheon 25142, South Korea; Sungkyunkwan Univ, Sch Pharm, Suwon 440746, South Korea; Kyungpook Natl Univ, Sch Life Sci & Biotechnol, BK21 Plus KNU Creat BioRes Grp, Daegu 41566, South Korea | ; Kim, Ki Hyun/AFL-6089-2022; Choi, dongKyu/LKL-2959-2024; Hong, Ki Bum/HZJ-2624-2023; ra, moonjin/AAK-3816-2021 | 59057730100; 16178416700; 57209163048; 57193763241; 57860439400; 56803983800; 57215816624; 57202875112; 57190668759; 7202852238; 57212624737; 14526268100 | autrition15@dgmif.re.kr;dcwoo@amc.seoul.kr;ibelieveinmiracle@gmail.com;ramj90@himh.re.kr;khkim83@skku.edu;davidseoungrak@gmail.com;dongkyu@dgmif.re.kr;jini150117@gmail.com;kbhong@dgmif.re.kr;shmin03@dgmif.re.kr;leerayongjun@gmail.com;yujihoon@dgmif.re.kr; | BIOLOGY-BASEL | BIOLOGY-BASEL | 2079-7737 | 9 | 5 | SCIE | BIOLOGY | 2020 | 5.079 | 16.7 | 1.22 | 2025-06-25 | 27 | 25 | EZH2; enhancer of zeste homolog 2; trimethylation on Lys 27 of histone H3; histone methyltransferase (HMT) | NONALCOHOLIC STEATOHEPATITIS; SELECTIVE-INHIBITION; DISEASE; EPIDEMIOLOGY; PATHOGENESIS; ENHANCER; MODEL | Enhancer of zeste homolog 2; EZH2; H3K27me3; Histone methyltransferase (HMT); Trimethylation on Lys 27 of histone H3 | English | 2020 | 2020-05 | 10.3390/biology9050093 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Buckling Resistance of Various Nickel-Titanium Glide Path Preparation Instruments in Dynamic or Static Mode | Introduction: The aim of this study was to compare the buckling resistance of nickel-titanium (NiTi) instruments for glide path preparation depending on the test mode (static vs dynamic). Methods: The conventional PathFile (PF; Dentsply Sirona, Ballaigues, Switzerland) and heattreated ProGlider (PG, Dentsply Sirona) and WaveOne Gold Glider (WG, Dentsply Sirona) were evaluated. The instrument tips were placed in a small dimple prepared in an aluminum cube in a customized device. The file was then pushed in the axial direction at a 1.0-mm/s crosshead speed with rotation (dynamic mode) or without rotation (static mode). The dynamic mode of WG used its dedicated reciprocating rotation, whereas the others were rotated continuously at 300 rpm. The axial load and lateral buckling displacement were simultaneously measured. Data were analyzed statistically using 2-way analysis of variance (P=.05). Results: The buckling resistance in the dynamic mode was higher than in the static mode for PG and WG(P.05). In the dynamic mode, the PG required the highest buckling load followed by PF and WG (P<.05). In the static mode, the WG showed the lowest load (P<.05). The dynamic mode showed significantly more upper level lateral buckling displacement than in the static mode (P<.05). Conclusions: When the glide path preparation instruments moved in the dynamic mode as in clinical situations, the buckling resistance of the heat-treated NiTi glide path instruments was higher than in the static condition. The heat-treated instruments may have better buckling resistance than the conventional NiTi instrument in clinical situations. | Ha, Jung-Hong; Kwak, Sang Won; Versluis, Antheunis; Kim, Hyeon-Cheol | Kyungpook Natl Univ, Sch Dent, Dept Conservat Dent, Daegu, South Korea; Pusan Natl Univ, Sch Dent, Dent Res Inst, Dept Conservat Dent, Yangsan, South Korea; Univ Tennessee, Coll Dent, Hlth Sci Ctr, Dept Biosci Res, Memphis, TN USA | ; Kim, Hyeon/AAQ-9057-2021 | 55549831900; 54787794900; 56230769700; 35746710200 | golddent@pusan.ac.kr; | JOURNAL OF ENDODONTICS | J ENDODONT | 0099-2399 | 1878-3554 | 46 | 8 | SCIE | DENTISTRY, ORAL SURGERY & MEDICINE | 2020 | 4.171 | 16.9 | 0.52 | 2025-06-25 | 5 | 7 | Buckling resistance; dynamic; glide path; nickel-titanium rotary file; rotation; static | MECHANICAL-BEHAVIOR; ROTARY | Buckling resistance; dynamic; glide path; nickel-titanium rotary file; rotation; static | Dental Alloys; Equipment Design; Materials Testing; Nickel; Root Canal Preparation; Rotation; Titanium; dental alloy; nickel; titanium; equipment design; materials testing; root canal preparation; rotation | English | 2020 | 2020-08 | 10.1016/j.joen.2020.05.006 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | Article | Effect of Shaft Length on the Torsional Resistance of Rotary Nickel–titanium Instruments | Introduction: This study was conducted to evaluate the effect of file length on the torsional resistance of nickel-titanium rotary files. Methods: Forty-five new files with a #25 tip size and variable taper for ProTaper Next (PTN; Dentsply Sirona, York PA), ProTaper Gold (PTG, Dentsply Sirona), and HyFlex CM (HCM; Coltene-Whaledent, Allstetten, Switzerland) were divided into 3 subgroups (n = 15) according to the file length (21, 25, and 31 mm). Torsional tests were performed using a custom-made device (AEndoS; DMJ System, Busan, Korea). The maximum torsional load and distortion angle were measured until file fracture occurred. The toughness was calculated using these data. All data were statistically analyzed using 2-way analysis of variance at a confidence level of 95%. One-way analysis of variance and Duncan post hoc comparison were also conducted to assess the difference among the independent variables, shaft length, and file system. Results: A statistically significant interaction was observed between the file system and instrument length with respect to the maximum torsional load (P <. 05). The 31-mm shaft length of HCM showed higher maximum torsional load than that of the 25- and 21-mm shaft length in the HCM groups (P <. 05). Among the instrument systems, PTG showed the significantly highest maximum torsional load followed by PTN and HCM (P <. 05). The 31-mm shaft length of PTG showed significantly higher toughness than that of the 21- and 25-mm shaft lengths (P <. 05), whereas PTN and HCM did not show any difference in relation to the shaft length. Conclusions: Within the limitations of this study, the instrument with a longer shaft may have higher maximum torsional load or toughness than that with a shorter shaft. © 2019 American Association of Endodontists | Isik, Vasfiye; Kwak, Sang Won; Abu-Tahun, Ibrahim H.; Ha, Jung-Hong; Kayahan, Mehmet Baybora; Kim, Hyeon-Cheol | Department of Endodontics, Division of Clinical Sciences, Faculty of Dentistry, Okan University, Istanbul, Turkey; Department of Conservative Dentistry, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, South Korea; Department of Conservative Dentistry, School of Dentistry, The University of Jordan, Amman, Jordan; Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, South Korea; Department of Endodontics, Division of Clinical Sciences, Faculty of Dentistry, Okan University, Istanbul, Turkey; Department of Conservative Dentistry, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, South Korea | 57212222958; 54787794900; 55637596300; 55549831900; 8853818700; 35746710200 | bayborakayahan@yahoo.com; | Journal of Endodontics | J ENDODONT | 0099-2399 | 1878-3554 | 46 | 2 | SCIE | DENTISTRY, ORAL SURGERY & MEDICINE | 2020 | 4.171 | 16.9 | 0.52 | 2025-06-25 | 5 | File fracture; instrument length; nickel-titanium file; shaft length; torsional resistance | Dental Alloys; Dental Instruments; Equipment Design; Equipment Failure; Materials Testing; Nickel; Root Canal Preparation; Titanium; Torsion, Mechanical; dental alloy; nickel; titanium; dental device; device failure; equipment design; materials testing; mechanical torsion; root canal preparation | English | Final | 2020 | 10.1016/j.joen.2019.10.019 | 바로가기 | 바로가기 | 바로가기 | |||||||
| ○ | ○ | Article | Hybrid star HD 81817 accompanied by brown dwarf or substellar companion | HD 81817 is known as a hybrid star. Hybrid stars have both cool stellar wind properties and Ultraviolet (UV) or even X-ray emission features of highly ionized atoms in their spectra. A white dwarf companion has been suggested as the source of UV or X-ray features. HD 81817 has been observed since 2004 as a part of a radial velocity (RV) survey program to search for exoplanets around K giant stars using the Bohyunsan Observatory Echelle Spectrograph at the 1.8 m telescope of Bohyunsan Optical Astronomy Observatory in Korea. We obtained 85 RV measurements between 2004 and 2019 for HD 81817 and found two periodic RV variations. The amplitudes of RV variations are around 200 m s(-1), which are significantly lower than that expected from a closely orbiting white dwarf companion. Photometric data and relevant spectral lines were also analyzed to help determine the origin of the periodic RV variations. We conclude that 627.4-day RV variations are caused by intrinsic stellar activities such as long-term pulsations or rotational modulations of surface activities based on H-alpha equivalent width variations of a similar period. On the other hand, 1047.1-day periodic RV variations are likely to be caused by a brown dwarf or substellar companion, which is corroborated by a recent Gaia proper motion anomaly for HD 81817. The Keplerian fit yields a minimum mass of 27.1 M-Jup, a semimajor axis of 3.3 AU, and an eccentricity of 0.17 for the stellar mass of 4.3 M-circle dot for HD 81817. The inferred mass puts HD 81817 b in the brown dwarf desert. | Bang, Tae-Yang; Lee, Byeong-Cheol; Perdelwitz, Volker; Jeong, Gwanghui; Han, Inwoo; Oh, Hyeong-Il; Park, Myeong-Gu | Kyungpook Natl Univ, Dept Astron & Atmospher Sci, 80 Daehakro, Daegu 41566, South Korea; Korea Astron & Space Sci Inst, 776 Daedukdae Ro, Daejeon 34055, South Korea; Korea Univ Sci & Technol, 217 Gajeong Ro, Daejeon 34113, South Korea; Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany | 57201317966; 8878262900; 56980008300; 56152551500; 7201559866; 56988390800; 7404490321 | mgp@knu.ac.kr; | ASTRONOMY & ASTROPHYSICS | ASTRON ASTROPHYS | 0004-6361 | 1432-0746 | 638 | SCIE | ASTRONOMY & ASTROPHYSICS | 2020 | 5.803 | 16.9 | 0.2 | 2025-06-25 | 4 | 4 | stars: individual: HD 81817 | RADIAL-VELOCITIES; PARAMETERS; CORONAE | Stars: individual: HD 81817 | Giant stars; Observatories; Orbits; X rays; Echelle spectrograph; Equivalent width; Highly-ionized; Optical astronomy; Photometric data; Radial velocity; Rotational modulation; Surface activities; White dwarfs | English | 2020 | 2020-06-30 | 10.1051/0004-6361/201936613 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Impact and blast behavior of seismically-detailed RC and UHPFRC-Strengthened columns | In order to investigate the blast and impact resistance of seismically designed and detailed RC columns, six RC columns (160 x 160 x 2468 mm) were constructed and tested using shock-tube and drop-weight impact test facilities. The influence of seismic detailing, with higher amounts of transverse reinforcement, was investigated. In addition, the effects of retrofitting using ultra-high performance fiber-reinforced concrete (UHPFRC) jacketing were studied. Non-linear finite element analyses were also carried out to predict the experimental results. The test results demonstrated that the use of seismic detailing improves the blast resistance of columns, resulting in reductions of the maximum and residual displacements at the mid height of the column, better control of cracks, and an ability to sustain larger blast loads. However, for drop-weight impact loading, the seismically detailed column did not show significant improvements in the tolerance to local damage and the control of displacements. In contrast, the use of UHPFRC jacketing in combination with seismic detailing showed excellent control of displacements and increased load carrying capacity under both blast and impact loadings. | Lee, Jin-Young; Aoude, Hassan; Yoon, Young-Soo; Mitchell, Denis | Kyungpook Natl Univ, Sch Agr Civil & Bioind Engn, 80 Daehak Ro, Daegu 41566, South Korea; Univ Ottawa, Dept Civil Engn, Ottawa, ON K1N 6N5, Canada; Korea Univ, Sch Civil Environm & Architectural Engn, 145 Anam Ro, Seoul 02841, South Korea; McGill Univ, Dept Civil Engn & Appl Mech, 817 Sherbrooke St W, Montreal, PQ H3A 0C3, Canada | Yoon, Young Soo/LYO-5503-2024 | 57203144661; 35147679600; 7402126768; 7403871726 | ysyoon@korea.ac.kr; | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | INT J IMPACT ENG | 0734-743X | 1879-3509 | 143 | SCIE | ENGINEERING, MECHANICAL;MECHANICS | 2020 | 4.208 | 16.9 | 1.52 | 2025-06-25 | 30 | 35 | Blast; Impact; Seismic detailing; UHPFRC; column | FIBER-REINFORCED CONCRETE; CAPACITY; RESISTANCE; MESOSCALE | Blast; column; Impact; Seismic detailing; UHPFRC | Drops; Fiber reinforced concrete; Seismology; Shock tubes; Ultra-high performance concrete; Drop weight impact; Impact loadings; Local damage; Non-linear finite-element analysis; Residual displacement; Seismic detailing; Transverse reinforcement; Ultra-high-performance fiber-reinforced concrete; Blast resistance | English | 2020 | 2020-09 | 10.1016/j.ijimpeng.2020.103628 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Inside-out formation of nuclear discs and the absence of old central spheroids in barred galaxies of the TIMER survey | The centres of disc galaxies host a variety of structures built via both internal and external processes. In this study, we constrain the formation and evolution of these central structures, in particular, nuclear rings and nuclear discs, by deriving maps of mean stellar ages, metallicities, and [alpha /Fe] abundances. We use observations obtained with the MUSE integral-field spectrograph for the TIMER sample of 21 massive barred galaxies. Our results indicate that nuclear discs and nuclear rings are part of the same physical component, with nuclear rings constituting the outer edge of nuclear discs. All nuclear discs in the sample are clearly distinguished based on their stellar population properties. As expected in the picture of bar-driven secular evolution, nuclear discs are younger, more metal-rich, and exhibit lower [alpha /Fe] enhancements, as compared to their immediate surroundings. Moreover, nuclear discs exhibit well-defined radial gradients, with ages and metallicities decreasing, and [alpha /Fe] abundances increasing with radius out to the nuclear ring. Often, these gradients show no breaks from the edge of the nuclear disc up through the centre, suggesting that these structures extend to the very centres of galaxies. We argue that continuous (stellar) nuclear discs may form from a series of bar-built (initially gas-rich) nuclear rings that expand in their radius as the bar evolves. In this picture, nuclear rings are simply the (often) star-forming outer edge of nuclear discs. Finally, by combining our results with those taken from a accompanying kinematic study, we do not find evidence for the presence of large, dispersion-dominated components in the centres of these galaxies. This could be a result of quiet merger histories, despite the large galaxy masses, or, perhaps, due to high angular momentum and strong feedback processes preventing the formation of these kinematically hot components. | Bittner, Adrian; Sanchez-Blazquez, Patricia; Gadotti, Dimitri A.; Neumann, Justus; Fragkoudi, Francesca; Coelho, Paula; de Lorenzo-Caceres, Adriana; Falcon-Barroso, Jesus; Kim, Taehyun; Leaman, Ryan; Martin-Navarro, Ignacio; Mendez-Abreu, Jairo; Perez, Isabel; Querejeta, Miguel; Seidel, Marja K.; van de Ven, Glenn | European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany; Ludwig Maximilians Univ Munchen, Prof Huber Pl 2, D-80539 Munich, Germany; Univ Complutense Madrid, Dept Fis Tierra & Astrofis, Madrid 28040, Spain; Univ Complutense Madrid, Inst Fis Particulas & Cosmos, Madrid 28040, Spain; Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby Rd, Portsmouth PO1 3FX, Hants, England; Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany; Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, R Matao 1226, BR-05508090 Sao Paulo, Brazil; Inst Astrofis Canarias, Calle Via Lactea S-N, Tenerife 38205, Spain; Univ La Laguna, Dept Astrofis, Tenerife 38200, Spain; Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 702701, South Korea; Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany; Univ Granada, Fac Ciencias, Dept Fis Teor & Cosmos, Granada 18071, Spain; Univ Granada, Inst Univ Carlos I Fis Teor & Computac, Granada 18071, Spain; Observ Astron Nacl, C Alfonso XII 3, Madrid 28014, Spain; CALTECH, IPAC, MC 314-6,1200 E Calif Blvd, Pasadena, CA 91125 USA; Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria | Coelho, Paula/B-1592-2015; Perez, Isabel/AAF-9177-2019; van de Ven, Glenn/R-5189-2019; Martin-Navarro, Ignacio/F-5882-2016; Falcon-Barroso, Jesus/AAD-9660-2019; de Lorenzo-Cáceres, Adriana/AAA-6412-2020; Sanchez-Blazquez, Patricia/IYS-6088-2023; Leaman, Ryan/AAA-6065-2020; Querejeta, Miguel/KVY-3638-2024 | 57203535764; 16319840900; 55887354100; 56514665700; 55062198600; 23011441600; 23088009300; 6602632408; 57050549000; 12799378400; 55498121400; 23051261000; 57211263715; 35424450700; 56511324100; 18038742400 | adrian.bittner@eso.org; | ASTRONOMY & ASTROPHYSICS | ASTRON ASTROPHYS | 0004-6361 | 1432-0746 | 643 | SCIE | ASTRONOMY & ASTROPHYSICS | 2020 | 5.803 | 16.9 | 2.44 | 2025-06-25 | 55 | 53 | galaxies: evolution; galaxies: formation; galaxies: spiral; galaxies: stellar content; galaxies: structure; galaxies: bulges | STELLAR EVOLUTION DATABASE; RESOLUTION GALACTIC SPECTRA; EMISSION-LINE KINEMATICS; STAR-FORMATION; POPULATION SYNTHESIS; SECULAR EVOLUTION; SPIRAL GALAXIES; SAURON PROJECT; MOLECULAR GAS; SCALED-SOLAR | Galaxies: bulges; Galaxies: evolution; Galaxies: formation; Galaxies: spiral; Galaxies: stellar content; Galaxies: structure | Stars; Structures (built objects); Timing circuits; External process; Feedback process; Formation and evolutions; Integral field spectrograph; Physical components; Radial gradient; Secular evolution; Stellar populations; Galaxies | English | 2020 | 2020-11-03 | 10.1051/0004-6361/202038450 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Kinematic signatures of nuclear discs and bar-driven secular evolution in nearby galaxies of the MUSE TIMER project | The central regions of disc galaxies hold clues to the processes that dominate their formation and evolution. To exploit this, the TIMER project has obtained high signal-to-noise and spatial resolution integral-field spectroscopy data of the inner few kpc of 21 nearby massive barred galaxies, which allows studies of the stellar kinematics in their central regions with unprecedented spatial resolution. We confirm theoretical predictions of the effects of bars on stellar kinematics and identify box/peanuts through kinematic signatures in mildly and moderately inclined galaxies, finding a lower limit to the fraction of massive barred galaxies with box/peanuts at similar to 62%. Further, we provide kinematic evidence of the connection between barlenses, box/peanuts, and bars. We establish the presence of nuclear discs in 19 galaxies and show that their kinematics are characterised by near-circular orbits with low pressure support and that they are fully consistent with the bar-driven secular evolution picture for their formation. In fact, we show that these nuclear discs have, in the region where they dominate, larger rotational support than the underlying main galaxy disc. In addition, we define a kinematic radius for the nuclear discs and show that it relates to bar radius, ellipticity and strength, and bar-to-total ratio. Comparing our results with photometric studies of galaxy bulges, we find that careful, state-of-the-art galaxy image decompositions are generally able to discern nuclear discs from classical bulges if the images employed have high enough physical spatial resolution. In fact, we show that nuclear discs are typically identified in such image decompositions as photometric bulges with (near-)exponential profiles. However, we find that the presence of composite bulges (galaxies hosting both a classical bulge and a nuclear disc) can often be unnoticed in studies based on photometry alone and suggest a more stringent threshold to the Sersic index to identify galaxies with pure classical bulges. | Gadotti, Dimitri A.; Bittner, Adrian; Falcon-Barroso, Jesus; Mendez-Abreu, Jairo; Kim, Taehyun; Fragkoudi, Francesca; de Lorenzo-Caceres, Adriana; Leaman, Ryan; Neumann, Justus; Querejeta, Miguel; Sanchez-Blazquez, Patricia; Martig, Marie; Martin-Navarro, Ignacio; Perez, Isabel; Seidel, Marja K.; van de Ven, Glenn | European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany; Ludwig Maximilians Univ Munchen, Prof Huber Pl 2, D-80539 Munich, Germany; Inst Astrofis Canarias, Tenerife 38205, Spain; Univ La Laguna, Dept Astrofis, Tenerife 38206, Spain; Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 702701, South Korea; Korea Astron & Space Sci Inst, Daejeon 305348, South Korea; Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany; Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany; Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby Rd, Portsmouth PO1 3FX, Hants, England; Observ Astron Nacl, C Alfonso XII 3, Madrid 28014, Spain; Univ Complutense Madrid, Fac Ciencias Fis, IPARCOS, Madrid 28040, Spain; Univ Complutense Madrid, Dept Fis Tierra & Astrofis, Madrid 28040, Spain; Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England; Univ Granada, Fac Ciencias, Dept Fis Teor & Cosmos, Granada 18071, Spain; Univ Granada, Inst Univ Carlos I Fis Teor & Computac, Granada 18071, Spain; CALTECH, IPAC, MC 314-6,1200 E Calif Blvd, Pasadena, CA 91125 USA; Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria | ; Perez, Isabel/AAF-9177-2019; Falcon-Barroso, Jesus/AAD-9660-2019; Leaman, Ryan/AAA-6065-2020; Mendez Abreu, Jairo/B-2736-2019; van de Ven, Glenn/R-5189-2019; Martin-Navarro, Ignacio/F-5882-2016; Querejeta, Miguel/KVY-3638-2024; Sanchez-Blazquez, Patricia/IYS-6088-2023; de Lorenzo-Cáceres, Adriana/AAA-6412-2020 | 55887354100; 57203535764; 6602632408; 23051261000; 57050549000; 55062198600; 23088009300; 12799378400; 56514665700; 35424450700; 16319840900; 25824385000; 55498121400; 57211263715; 56511324100; 18038742400 | dgadotti@eso.org; | ASTRONOMY & ASTROPHYSICS | ASTRON ASTROPHYS | 0004-6361 | 1432-0746 | 643 | SCIE | ASTRONOMY & ASTROPHYSICS | 2020 | 5.803 | 16.9 | 2.71 | 2025-06-25 | 68 | 69 | galaxies: bulges; galaxies: evolution; galaxies: formation; galaxies: kinematics and dynamics; galaxies: photometry; galaxies: structure | BOXY/PEANUT-SHAPED BULGES; SIGHT VELOCITY DISTRIBUTIONS; SAURON PROJECT; STAR-FORMATION; SPIRAL GALAXIES; STRUCTURAL DECOMPOSITION; CIRCUMNUCLEAR REGION; STELLAR POPULATIONS; SURFACE PHOTOMETRY; ELLIPTIC GALAXIES | Galaxies: bulges; Galaxies: evolution; Galaxies: formation; Galaxies: kinematics and dynamics; Galaxies: photometry; Galaxies: structure | Image resolution; Kinematics; Photometry; Signal to noise ratio; Stars; Timing circuits; Formation and evolutions; Image decomposition; Integral Field Spectroscopy; Near-circular orbits; Secular evolution; Spatial resolution; State of the art; Stellar kinematics; Galaxies | English | 2020 | 2020-10-27 | 10.1051/0004-6361/202038448 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Stellar populations across galaxy bars in the MUSE TIMER project | Stellar populations in barred galaxies save an imprint of the influence of the bar on the host galaxy's evolution. We present a detailed analysis of star formation histories (SFHs) and chemical enrichment of stellar populations in nine nearby barred galaxies from the TIMER project. We used integral field observations with the MUSE instrument to derive unprecedented spatially resolved maps of stellar ages, metallicities, [Mg/Fe] abundances, and SFHs, as well as H alpha as a tracer of ongoing star formation. We find a characteristic V-shaped signature in the SFH that is perpendicular to the bar major axis, which supports the scenario where intermediate-age stars (similar to 2 - 6 Gyr) are trapped on more elongated orbits shaping a thinner part of the bar, while older stars (> 8 Gyr) are trapped on less elongated orbits shaping a rounder and thicker part of the bar. We compare our data to state-of-the-art cosmological magneto-hydrodynamical simulations of barred galaxies and show that such V-shaped SFHs arise naturally due to the dynamical influence of the bar on stellar populations with different ages and kinematic properties. Additionally, we find an excess of very young stars (< 2 Gyr) on the edges of the bars, predominantly on the leading side, thus confirming typical star formation patterns in bars. Furthermore, mass-weighted age and metallicity gradients are slightly shallower along the bar than in the disc, which is likely due to orbital mixing in the bar. Finally, we find that bars are mostly more metal-rich and less [Mg/Fe]-enhanced than the surrounding discs. We interpret this as a signature that the bar quenches star formation in the inner region of discs, usually referred to as star formation deserts. We discuss these results and their implications on two different scenarios of bar formation and evolution. | Neumann, Justus; Fragkoudi, Francesca; Perez, Isabel; Gadotti, Dimitri A.; Falcon-Barroso, Jesus; Sanchez-Blazquez, Patricia; Bittner, Adrian; Husemann, Bernd; Gomez, Facundo A.; Grand, Robert J. J.; Donohoe-Keyes, Charlotte E.; Kim, Taehyun; de Lorenzo-Coceres, Adriana; Martig, Marie; Mendez-Abreu, Jairo; Pakmor, Ruediger; Seidel, Marja K.; van de Ven, Glenn | Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England; Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14480 Potsdam, Germany; Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany; Univ Granada, Dept Fis Teor & Cosmos, Fac Ciencias, Edificio Mecenas, Granada 18071, Spain; Univ Granada, Inst Univ Carlos I Fis Teor & Computat, Granada 18071, Spain; European Southern Observ ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany; Inst Astrofis Canarias, Calle Via Lactea S-N, Tenerife 38205, Spain; Univ La Laguna, Dept Astrofis, Tenerife 38200, Spain; Univ Autonoma Madrid, Dept Fis Teor, Canto Blanco 28049, Spain; Univ Complutense Madrid, Fac Ciencias Fis, Inst Fis Particulas, Madrid 28040, Spain; Univ Complutense Madrid, Fac Ciencias Fis, Cosmos IPARCOS, Madrid 28040, Spain; Ludwig Maximilians Univ Munchen, Prof Huber Pl 2, D-80539 Munich, Germany; Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany; Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena 1305, Chile; Univ La Serena, Dept Astron, Av Juan Cisternas 1200 Norte, La Serena, Chile; Liverpool John Moores Univ, Astrophys Res Inst, IC2, Brownlow Hill, Liverpool L3 5RF, Merseyside, England; Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 702701, South Korea; Korea Astron & Space Sci Inst, Daejeon 305348, South Korea; Caltech IPAC, MC 314-6,1200 E Calif Blvd, Pasadena, CA 91125 USA | ; van de Ven, Glenn/R-5189-2019; Perez, Isabel/AAF-9177-2019; de Lorenzo-Cáceres, Adriana/AAA-6412-2020; Sanchez-Blazquez, Patricia/IYS-6088-2023; Falcon-Barroso, Jesus/AAD-9660-2019; Gomez, Facundo Ariel/JRW-9001-2023; Mendez Abreu, Jairo/B-2736-2019; Grand, Robert/AAH-9771-2019 | 56514665700; 55062198600; 57211263715; 55887354100; 6602632408; 16319840900; 57203535764; 24587314600; 35317309700; 54898652700; 57211883552; 57050549000; 23088009300; 25824385000; 23051261000; 25625718400; 56511324100; 18038742400 | jusneuma.astro@gmail.com; | ASTRONOMY & ASTROPHYSICS | ASTRON ASTROPHYS | 0004-6361 | 1432-0746 | 637 | SCIE | ASTRONOMY & ASTROPHYSICS | 2020 | 5.803 | 16.9 | 1.56 | 2025-06-25 | 34 | 31 | galaxies; formation; galaxies; evolution; galaxies; stellar content; galaxies; structure; galaxies; star formation; galaxies; kinematics and dynamics | RESOLUTION GALACTIC SPECTRA; EMISSION-LINE KINEMATICS; STAR-FORMATION; EVOLUTION DATABASE; SECULAR EVOLUTION; SAURON PROJECT; INNER BARS; 3-DIMENSIONAL BARS; ORBITAL DYNAMICS; RADIAL MIGRATION | Galaxies: evolution; Galaxies: formation; Galaxies: kinematics and dynamics; Galaxies: star formation; Galaxies: stellar content; Galaxies: structure | Arid regions; Chemical analysis; Magnetohydrodynamics; Population statistics; Timing circuits; Formation and evolutions; Integral field; Kinematic properties; MUSE instrument; Spatially resolved; Star formations; State of the art; Stellar populations; Stars | English | 2020 | 2020-05-14 | 10.1051/0004-6361/202037604 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | The kinematics of young and old stellar populations in nuclear rings of MUSE TIMER galaxies | Context. Studying the stellar kinematics of galaxies is a key tool in the reconstruction of their evolution. However, the current measurements of the stellar kinematics are complicated by several factors, including dust extinction and the presence of multiple stellar populations. Aims. We use integral field spectroscopic data of four galaxies from the Time Inference with MUSE in Extragalactic Rings (TIMER) survey to explore and compare the kinematics measured in different spectral regions that are sensitive to distinct stellar populations. Methods. We derive the line-of-sight velocity and velocity dispersion of both a young (less than or similar to 2 Gyr) and an old stellar population from the spectral regions around the H beta line and the Ca II Triplet. In addition, we determine colour excess, mean age, and metallicity. Results. We report a correlation of the colour excess with the difference in the kinematic parameters of the H beta line and the Ca II Triplet range, which are dominated by young and old stellar populations, respectively. Young stellar populations, located primarily in nuclear rings, have higher velocity dispersions than old ones. These differences in the rings are typically similar to 10 km s(-1) in velocity dispersion but can have a mean value as high as similar to 24 km s(-1) in the most extreme case. Trends with age exist in the nuclear rings but are less significant than those with dust extinction. We report different degrees of correlation for these trends among the galaxies in the sample, which are related to the size of the Voronoi bins in their rings. No clear trends for the line-of-sight velocity differences are observed. The absence of these trends can be explained as a consequence of the H beta line masking process during the kinematic extraction, as confirmed by dedicated simulations. Conclusions. Our study demonstrates that kinematic differences caused by different stellar populations can be identified in the central regions of nearby galaxies, even from intermediate resolution spectroscopy. This opens the door to future detailed chemo-kinematic studies of galaxies, but also serves as a warning against deriving kinematics from full-spectrum fitting across very wide wavelength ranges when intense star formation is taking place. | Rosado-Belza, D.; Falcon-Barroso, J.; Knapen, J. H.; Bittner, A.; Gadotti, D. A.; Neumann, J.; de Lorenzo-Caceres, A.; Mendez-Abreu, J.; Querejeta, M.; Martin-Navarro, I.; Sanchez-Blazquez, P.; Coelho, P. R. T.; Martig, M.; van de Ven, G.; Kim, T. | Inst Astrofis Canarias, San Cristobal De Laguna 38205, Santa Cruz De T, Spain; Univ La Laguna, Dept Astrofis, San Cristobal De Laguna 38205, Santa Cruz De T, Spain; European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany; Ludwig Maximilians Univ Munchen, Professor Huber Pl 2, D-80539 Munich, Germany; Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby Rd, Portsmouth PO1 3FX, Hants, England; Univ Granada, Dept Fis & Cosmos, Campus Fuentenueva,Edificio Mecenas, Granada 18071, Spain; Inst Carlos I Fis Teor & Computac, Fac Ciencias, Granada 18071, Spain; Observatorio Astron Nacl IGN, C Alfonso XII 3, Madrid 28014, Spain; Univ Complutense Madrid, Dept Fis Tierra & Astrofis, Madrid 28040, Spain; Univ Complutense Madrid, IPARCOS, Fac CC Fis, Madrid 28040, Spain; Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo, SP, Brazil; Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England; Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria; Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 702701, South Korea | Martin-Navarro, Ignacio/F-5882-2016; Falcon-Barroso, Jesus/AAD-9660-2019; Querejeta, Miguel/KVY-3638-2024; Sanchez-Blazquez, Patricia/IYS-6088-2023; van de Ven, Glenn/R-5189-2019; Knapen, Johan/Z-4828-2019; Coelho, Paula/B-1592-2015; de Lorenzo-Cáceres, Adriana/AAA-6412-2020 | 57208084641; 6602632408; 7005317106; 57203535764; 55887354100; 56514665700; 23088009300; 23051261000; 35424450700; 55498121400; 16319840900; 23011441600; 25824385000; 18038742400; 57050549000 | drb@iac.es; | ASTRONOMY & ASTROPHYSICS | ASTRON ASTROPHYS | 0004-6361 | 1432-0746 | 644 | SCIE | ASTRONOMY & ASTROPHYSICS | 2020 | 5.803 | 16.9 | 0.27 | 2025-06-25 | 7 | 7 | galaxies: kinematics and dynamics; galaxies: evolution; galaxies: stellar content; galaxies: structure; galaxies: general | POTSDAM MULTIAPERTURE SPECTROPHOTOMETER; BULGE-DISC DECOMPOSITION; STAR-FORMATION; SECULAR EVOLUTION; SPIRAL GALAXIES; NGC 1300; ELLIPTIC GALAXIES; SAURON PROJECT; MASS INFLOW; BAR | galaxies: Evolution; galaxies: General; galaxies: Kinematics and dynamics; galaxies: Stellar content; galaxies: Structure | Dispersion (waves); Dust; Galaxies; Kinematics; Population statistics; Timing circuits; Velocity; Dust extinctions; Kinematic parameters; Spectroscopic data; Stellar kinematics; Stellar populations; Velocity difference; Velocity dispersion; Wavelength ranges; Stars | English | 2020 | 2020-12-08 | 10.1051/0004-6361/202039530 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Analyses of Work Efficiency of a Strawberry-Harvesting Robot in an Automated Greenhouse | Protected cultivation systems such as greenhouses are becoming increasingly popular globally and have been adopted because of unpredictable climatic conditions and their ability to easily control micro- and macroenvironments. However, limitations such as hazardous work environments and shortages in labor are major concerns for agricultural production using these structures. This has led to the development and adoption of robotic systems. For the efficient use of robots in protected cultivation systems, we formulate the work efficiency problem and model a three-dimensional standard strawberry greenhouse to analyze the effectiveness of a strawberry-harvesting robot compared to different levels of human workforce (experienced, average, and beginner). Simulations are conducted using Quest software to compare the efficiency of different scenarios of robotics to humans. Different methods of improvement from battery capacity and charge rate to harvesting speed are investigated and optimal conditions are recommended. The average hourly production of the robot is about five times lower than that of skilled workers. However, robots are more productive due to their ability to work around the clock. Comparative analyses show that a reduction in harvesting time per strawberry from 3 to 1 s would result in an increase in daily production from 347.93 to 1021.30 kg. This would lead to a five-fold increase in comparison to present daily production. A 10% improvement in battery charge time would result in the battery capacity gaining two extra hours from the current 10 h and would cut the current 2 h needed for charge to 1 h. This paper proposes an operation process and suggestions for changes needed for improving the work efficiency of robots in a greenhouse. This could be extended to other crops and greenhouses. | Woo, Seungmin; Uyeh, Daniel Dooyum; Kim, Junhee; Kim, Yeongsu; Kang, Seokho; Kim, Kyoung Chul; Lee, Si Young; Ha, Yushin; Lee, Won Suk | Kyungpook Natl Univ, Upland Field Machinery Res Ctr, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Bioind Machinery Engn, Daegu 41566, South Korea; Rural Dev Adm, Natl Acad Agr Sci, Div Smart Farm Dev, Jeonju Si 54875, Jeollabuk Do, South Korea; Rural Dev Adm, Natl Acad Agr Sci, R&D Coordinat Div, Jeonju Si 54875, Jeollabuk Do, South Korea; Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA | ; Kim, Youngchul/AAI-1199-2020; Lee, Won Suk/A-9824-2013 | 57192074884; 57194449611; 57197854979; 57210594021; 57221791368; 57225077819; 57202327349; 57192072314; 57201296889 | woosm7571@gmail.com;uyehdooyum@gmail.com;sda2356@naver.com;mvio9256@naver.com;deshshk@naver.com;kkcmole@korea.kr;leesy42@korea.kr;yushin72@knu.ac.kr;wslee@ufl.edu; | AGRONOMY-BASEL | AGRONOMY-BASEL | 2073-4395 | 10 | 11 | SCIE | AGRONOMY;PLANT SCIENCES | 2020 | 3.417 | 17.0 | 1.21 | 2025-06-25 | 21 | 25 | protected cultivation; greenhouse; robots; work efficiency; premium crops | PROTECTED CULTIVATION; TEMPERATE REGIONS; HIMACHAL-PRADESH; CLIMATE-CHANGE; AGRICULTURE; DROUGHT | Greenhouse; Premium crops; Protected cultivation; Robots; Work efficiency | English | 2020 | 2020-11 | 10.3390/agronomy10111751 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Crop Height Measurement System Based on 3D Image and Tilt Sensor Fusion | Machine-vision-based crop detection is a central issue for digital farming, and crop height is an important factor that should be automatically measured in robot-based cultivations. Three-dimensional (3D) imaging cameras make it possible to measure actual crop height; however, camera tilt due to irregular ground conditions in farmland prevents accurate height measurements. In this study, stereo-vision-based crop height was measured with compensation for the camera tilt effect. For implementing the tilt of the camera installed on farm machines (e.g., tractors), we developed a posture tilt simulator for indoor testing that could implement the camera tilt by pitch and roll rotations. Stereo images were captured under various simulator tilt conditions, and crop height was measured by detecting the crop region in a disparity map, which was generated by matching stereo images. The measured height was compensated for by correcting the position of the region of interest (RoI) in the 3D image through coordinate transformation between camera coordinates and simulator coordinates. The tests were conducted by roll and pitch rotation around the simulator coordinates. The results showed that crop height could be measured using stereo vision, and that tilt compensation reduced the average error from 15.6 to 3.9 cm. Thus, the crop height measurement system proposed in this study, based on 3D imaging and a tilt sensor, can contribute to the automatic perception of agricultural robots. | Kim, Wan-Soo; Lee, Dae-Hyun; Kim, Yong-Joo; Kim, Yeon-Soo; Kim, Taehyeong; Park, Seong-Un; Kim, Sung-Soo; Hong, Dong-Hyuck | Chungnam Natl Univ, Dept Biosyst Machinery Engn, Daejeon 34134, South Korea; Chungnam Natl Univ, Dept Smart Agr Syst, Daejeon 34134, South Korea; Korea Inst Ind Technol KITECH, Smart Agr Machinery R&D Grp, Gimje 54325, South Korea; Seoul Natl Univ, Interdisciplinary Program Cognit Sci, Seoul 08826, South Korea; TYM ICT Co Ltd, Reliabil Test Team, Gongju 32530, South Korea; Chungnam Natl Univ, Dept Mecharon Engn, Daejeon 34134, South Korea; Kyungpook Natl Univ, Dept Bioind Machinery Engn, Daegu 41566, South Korea | Kim, Yong-Joo/AAK-1840-2021; Kim, Soo-Yeon/ADR-9663-2022; Lee, Dae/T-9838-2019 | 57192918810; 55541929900; 57204759454; 57192923355; 57205305072; 57213917936; 7601601584; 57192068978 | wskim0726@gmail.com;leedh7@cnu.ac.kr;babina@cnu.ac.kr;kimtech612@gmail.com;thkim@bi.snu.ac.kr;psu0322@tymict.com;sookim@cnu.ac.kr;bear0011@knu.ac.kr; | AGRONOMY-BASEL | AGRONOMY-BASEL | 2073-4395 | 10 | 11 | SCIE | AGRONOMY;PLANT SCIENCES | 2020 | 3.417 | 17.0 | 0.7 | 2025-06-25 | 7 | 8 | crop height; stereo camera; tilt sensor; tilt effect compensation; coordinate transformation; agricultural robot | FIELD; STATE | Agricultural robot; Coordinate transformation; Crop height; Stereo camera; Tilt effect compensation; Tilt sensor | English | 2020 | 2020-11 | 10.3390/agronomy10111670 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Development of a Building Energy Simulation Model for Control of Multi-Span Greenhouse Microclimate | In this study, we propose a building energy simulation model of a multi-span greenhouse using a transient system simulation program to simulate greenhouse microenvironments. The proposed model allows daily and seasonal control of screens, roof vents, and heating setpoints according to crop needs. The proposed model was used to investigate the effect of different thermal screens, natural ventilation, and heating setpoint controls on annual and maximum heating loads of a greenhouse. The experiments and winter season weather conditions of greenhouses in Taean Gun (latitude 36.88 degrees N, longitude 126.24 degrees E, elevation 45 m) Chungcheongnam-do, South Korea was used for validation of our model. Nash-Sutcliffe efficiency coefficients of 0.87 and 0.71 showed good correlation between the computed and experimental results; thus, the proposed model is appropriate for performing greenhouse thermal simulations. The results showed that the heating loads of the triple-layered screen were 70% and 40% lower than that of the single-screen and double-screen greenhouses, respectively. Moreover, the maximum heating loads without a screen and for single-, double-, and the triple-layered screens were 0.65, 0.46, 0.41, and 0.34 MJ m(-2), respectively. The analysis of different screens showed that Ph-77 (shading screen) combined with Ph-super (thermal screen) had the least heating requirements. The heating setpoint analysis predicted that using the designed day- and nighttime heating control setpoints can result in 3%, 15%, 14%, 15%, and 40% less heating load than when using the fixed value temperature control for November, December, January, February, and March, respectively. | Rasheed, Adnan; Kwak, Cheul Soon; Na, Wook Ho; Lee, Jong Won; Kim, Hyeon Tae; Lee, Hyun Woo | Kyungpook Natl Univ, Dept Agr Engn, Daegu 41566, South Korea; Culti Labs Co Ltd, Smart Farm Syst Dept, Kangnung 25440, South Korea; Kyungpook Natl Univ, Inst Agr Sci & Technol, Daegu 41566, South Korea; Korea Natl Coll Agr & Fisheries, Dept Hort Environm Syst, Jeonju Si 54874, Jeollabuk Do, South Korea; Gyeongsang Natl Univ, Dept Bioind Machinery Engn, Jinju 52828, South Korea; Kyungpook Natl Univ, Smart Agr Innovat Ctr, Daegu 41566, South Korea | ; Rasheed, Adnan/ABE-6624-2021 | 56080100700; 51665252000; 57211208368; 50062247400; 8662923200; 57209160180 | adnanrasheed@knu.ac.kr;cskwak@cultilabs.com;wooks121@hanmail.net;leewon1@korea.kr;bioani@gnu.ac.kr;whlee@knu.ac.kr; | AGRONOMY-BASEL | AGRONOMY-BASEL | 2073-4395 | 10 | 9 | SCIE | AGRONOMY;PLANT SCIENCES | 2020 | 3.417 | 17.0 | 1.71 | 2025-06-25 | 23 | 25 | thermal screen control; heat energy saving; greenhouse microclimate control; multi-span greenhouse; TRNSYS | DESIGN PARAMETERS; CFD TECHNIQUE; ORIENTATION; CLIMATE | Greenhouse microclimate control; Heat energy saving; Multi-span greenhouse; Thermal screen control; TRNSYS | English | 2020 | 2020-09 | 10.3390/agronomy10091236 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Effects of Sublethal Doses of Methyl Benzoate on the Life History Traits and Acetylcholinesterase (AChE) Activity of Aphis gossypii | Safer alternatives to synthetic pesticides are essential for sustainable agriculture. Methyl benzoate (MB) is a volatile essential oil found in several plants. Recent reports of the toxicity of MB to arthropod pests suggest that MB may be a useful alternative insecticide. The present study assessed the effects of a sublethal concentration of MB (LC30, 0.22%) on the life history and reproductive characteristics of the cotton aphid, Aphis gossypii Glover, in both a treated parental generation (F-0) and untreated progeny (F-1). MB treatment significantly decreased longevity and fecundity in both the F-0 and F-1 generations, and prolonged the developmental duration of each immature instar of the F-1 generations, compared with controls. The intrinsic rate of increase (r), finite rate of increase (lambda), and net reproductive rate (R-0) of the F-1 generation were significantly reduced, compared to controls. The mode of action of MB is not known, but in aphids treated with LC30 MB, the activity of the enzyme acetylcholinesterase (AChE) decreased by more than 65%, compared with untreated controls. AChE activity was rapidly inhibited within 1 h, and remained inhibited for 6 h after in vivo exposure to MB. Moreover, molecular docking analysis revealed that MB had a strong affinity with the catalytic site of AChE, with a binding energy value of -6.2 kcal/mole. Our results suggest that MB targets AChE, and that a sublethal dose of MB can have adverse transgenerational effects on cotton aphids. | Mostafiz, Md Munir; Alam, Md Badrul; Chi, Hsin; Hassan, Errol; Shim, Jae-Kyoung; Lee, Kyeong-Yeoll | Kyungpook Natl Univ, Coll Agr & Life Sci, Div Appl Biosci, Daegu 41566, South Korea; Kyungpook Natl Univ, Grad Sch, Dept Food Sci & Biotechnol, Daegu 41566, South Korea; Kyungpook Natl Univ, Inner Beauty Antiaging Ctr, Food & Bioind Res Inst, Daegu 41566, South Korea; Natl Chung Hsing Univ, Dept Entomol, Taichung 402, Taiwan; Univ Queensland Gatton, Sch Agr & Food Sci, Gatton, Qld 4343, Australia; Kyungpook Natl Univ, Inst Agr Sci & Technol, Daegu 41566, South Korea; Kyungpook Natl Univ, Sustainable Agr Res Ctr, Gunwi 39061, South Korea; Kyungpook Natl Univ, Res Inst Dok Do & Ulleung Do Isl, Daegu 41566, South Korea | Chi, Hsin/L-6860-2019; Mostafiz, Md. Munir/AAD-7664-2019; ALAM, MD BADRUL/AFL-7668-2022 | 57204895546; 56706777100; 7102258856; 16458195700; 7201856347; 57217153096 | munirmostafiz12@gmail.com;mbalam@knu.ac.kr;hsinchi@dragon.nchu.edu.tw;e.hassan@uq.edu.au;astelia@naver.com;leeky@knu.ac.kr; | AGRONOMY-BASEL | AGRONOMY-BASEL | 2073-4395 | 10 | 9 | SCIE | AGRONOMY;PLANT SCIENCES | 2020 | 3.417 | 17.0 | 1.71 | 2025-06-25 | 29 | 28 | natural pesticide; sublethal effects; two-sex life table; population parameters; enzyme activity; molecular target | NITROMETHYLENE NEONICOTINOID INSECTICIDE; COTTON APHID; HEMIPTERA APHIDIDAE; MYZUS-PERSICAE; LETHAL; HYMENOPTERA; RESISTANCE; RATES | Enzyme activity; Molecular target; Natural pesticide; Population parameters; Sublethal effects; Two-sex life table | English | 2020 | 2020-09 | 10.3390/agronomy10091313 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Evaluating Growth and Photosynthesis of Kimchi Cabbage According to Extreme Weather Conditions | The aim of this study was to develop and validate growth and photosynthetic models of Kimchi cabbages under extreme temperature conditions at different growth stages. Kimchi cabbage plants were subjected to low and high air temperatures 7-10 days after transplanting (DAT) and 40-43 DAT using extreme weather simulators. Except during these periods, the air temperature, relative humidity, solar radiation, and precipitation were set according to previous meteorological data. The experiments were performed over two years: in the first year, data were used to develop the models; the second-year experimental data were used for validation. The growth parameters and relative growth rate of Kimchi cabbage decreased due to low and high air temperature treatments. Photosynthetic CO2 response curves, which were measured using a portable gas exchange system, were used to calculate three biochemical parameters from measured data: photochemical efficiency, carboxylation conductance, and dark respiration. These parameters were used to develop the photosynthetic models (modified Thornley's models) representing predictions of net photosynthetic rate by CO2 concentration and growth stage. The simulated photosynthetic rate with extreme high temperature treatment (35/31 degrees C) was 19.7 mu mol m(-2) s(-1) which was evaluated approximately 3% deduction compared with control. Results of this study indicate that the growth and photosynthetic models developed here could be applied to evaluate retarded growth and net photosynthetic rate under extreme temperature conditions. | Wi, Seung Hwan; Lee, Hee Ju; An, Sewoong; Kim, Sung Kyeom | Natl Inst Hort & Herbal Sci, Vegetable Res Div, Wonju 55365, South Korea; Kyungpook Natl Univ, Coll Agr & Life Sci, Dept Hort Sci, Daegu 41566, South Korea | ; Kim, Sung Kyeom/AAD-9230-2019 | 58607882100; 59106640900; 57211403160; 50262290200 | kgad@korea.kr;perpetuaa@korea.kr;woong0911@korea.kr;skkim76@knu.ac.kr; | AGRONOMY-BASEL | AGRONOMY-BASEL | 2073-4395 | 10 | 12 | SCIE | AGRONOMY;PLANT SCIENCES | 2020 | 3.417 | 17.0 | 1.01 | 2025-06-25 | 13 | 14 | Brassica rapa ssp; pekinensis; crop growth model; extreme weather events; retarded growth; head formation; photosynthetic rate | HEADING CHINESE-CABBAGE; LOW-TEMPERATURE; PHYSIOLOGICAL-RESPONSES; CO2 ASSIMILATION; CARBON-DIOXIDE; HEAT TOLERANCE; CLIMATE-CHANGE; DYNAMIC-MODEL; LIGHT; YIELD | Brassica rapa ssp. pekinensis; Crop growth model; Extreme weather events; Head formation; Photosynthetic rate; Retarded growth | English | 2020 | 2020-12 | 10.3390/agronomy10121846 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Evaluation of Iraqi Rice Cultivars for Their Tolerance to Drought Stress | Drought stress is a serious problem around the globe and particularly in the Republic of Iraq. Rice is the third most consumed crop for the Iraqi people; however, its cultivation and production is very low due to several challenges including drought. The current study was performed to evaluate five Iraqi rice cultivars along with relevant (drought-tolerant and drought-susceptible) controls under drought stress, either by treatment with 10% PEG (polyethylene glycol) or through water withholding to induce natural drought stress. The phenotypes of all the cultivars were evaluated and the transcriptional responses of key drought-responsive candidate genes, identified through the EST-SSR marker-based approach, were studied. We also studied transcript accumulation of drought-related transcriptional factors, such as OsGRASS23, OsbZIP12, and OsDREB2A. Moreover, the reference cultivars also included a drought-tolerant inter-specific cultivar Nerica 7 (a cross between Oryza sativa ssp. indica X O. glaberrima). Among the cultivars, the more drought-tolerant phenotypic characteristics and higher transcript accumulation of drought-related marker genes OsE647 and OsE1899 and transcriptional factors OsGRASS23, OsbZIP12, and OsDREB2A were observed in four (out of five) significantly drought-tolerant Iraqi cultivars; Mashkab, followed by Furat, Yasmen, and Amber 33. On another note, Amber Barka was found to be significantly drought susceptible. Mashkab and Amber Barka were found to be the most drought-tolerant and-susceptible cultivars, respectively. The identified tolerant cultivars may potentially serve as a genetic source for the incorporation of drought-tolerant phenotypes in rice. | Al Azzawi, Tiba Nazar Ibrahim; Khan, Murtaza; Hussain, Adil; Shahid, Muhammad; Imran, Qari Muhammad; Mun, Bong-Gyu; Lee, Sang-Uk; Yun, Byung-Wook | Kyungpook Natl Univ, Sch Appl Biosci, Daegu 41566, South Korea; State Co Agr Supplies, Minist Agr, Baghdad 10064, Iraq; Abdul Wali Khan Univ, Dept Agr, Mardan 23200, Pakistan; Umea Univ, Dept Med Biochem & Biophys, S-90187 Umea, Sweden | Mun, BongGyu/GYD-6010-2022; Hussain, Dr. Adil/K-6016-2018; Hussain, Adil/K-6016-2018; Imran, Qari Muhammad/ABG-6074-2022; Shahid, Muhammad/AAE-9424-2020 | 57224980187; 57207990116; 41961162600; 59577718600; 55849263700; 57147241300; 57203597131; 8245123600 | redflower660@yahoo.com;murtazakhan.bio@gmail.com;adilhussain@awkum.edu.pk;shahidariswat@gmail.com;mimranbot@gmail.com;mun0301@naver.com;uk0gam@gmail.com;bwyun@knu.ac.kr; | AGRONOMY-BASEL | AGRONOMY-BASEL | 2073-4395 | 10 | 11 | SCIE | AGRONOMY;PLANT SCIENCES | 2020 | 3.417 | 17.0 | 1.51 | 2025-06-25 | 21 | 26 | rice cultivars; drought stress; transcription factors; chlorophyll content; shoot and root length; qRT PCR | ABIOTIC STRESS; TRANSCRIPTION FACTORS; GENE; RESPONSES; EXPRESSION; PLANTS; PHOTOSYNTHESIS; DEHYDRATION; IMPROVEMENT; TEMPERATURE | Chlorophyll content; Drought stress; QRT PCR; Rice cultivars; Shoot and root length; Transcription factors | English | 2020 | 2020-11 | 10.3390/agronomy10111782 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: