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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 | Metalinguistic explanations and their impact on incidental grammar acquisition: An eye-movement study | Recent research highlights the value of metalinguistic explanations in facilitating second language (L2) grammar acquisition. Nevertheless, a notable research gap persists regarding how these explanations influence incidental grammar acquisition and their impact on overall reading processes and comprehension. Furthermore, whether the potentially positive effects of metalinguistic explanations transfer to the acquisition of subsequent constructions without explicit guidance is an unexplored domain. This study addresses these research gaps by recruiting 42 Korean undergraduate students and assigning them to the metalinguistic or baseline groups. The metalinguistic group read an English text supplemented with bottom-margin metalinguistic explanations, which elucidated the first half of the target grammar (without explanations for the second half), whereas the baseline group read the same text without explanations. This study used eye-tracking technology to register participants’ eye movements during reading, followed by an announced reading comprehension test and an unannounced error correction test. Statistical analyses using linear mixed-effects models (LMMs) and t-tests revealed that metalinguistic explanations significantly enhanced incidental grammar acquisition in L2 learners without compromising overall reading processes and comprehension. However, the benefits of metalinguistic explanations in the metalinguistic group failed to extend to the incidental learning of other unexplained constructions. © The Author(s) 2024. | Ryu, Hyeran; Choi, Sungmook | Kyungpook National University, South Korea; Kyungpook National University, South Korea | 59355707800; 56124260900 | sungmookchoi@knu.ac.kr; | Language Teaching Research | LANG TEACH RES | 1362-1688 | 1477-0954 | SSCI | EDUCATION & EDUCATIONAL RESEARCH;LINGUISTICS | 2024 | 3.8 | 6.8 | 0 | 2025-05-07 | 0 | eye tracking; incidental grammar acquisition; metalinguistic explanations; text modification; transfer effect | English | Article in press | 2024 | 10.1177/13621688241286668 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | ○ | Article | Microstructure of shell and grain boundary phase in Nd-Fe-B sintered magnets grain boundary diffusion processed with low-melting LRE-Al-Cu (LRE = La and Pr) alloys | We report magnetic and microstructural changes in Nd-Fe-B sintered magnets after the grain boundary diffusion process (GBDP) of low-melting LRE-Al-Cu alloys [LRE (Light Rare-earth) = La and Pr]. A distinctive micro- structural feature of the magnets GBD treated with La-Al-Cu (LAC) and Pr-Al-Cu (PAC) were characterized via the electron probe microanalysis and high-angle annular dark-field scanning transmission electron microscopy analysis at a depth of 50 mu m from the magnet surface. The formation of a thick high-anisotropy Pr-Al-rich shell was clearly observed in the PAC-GBDP magnets, whereas there was no distinct shell formation in the LAC-GBDP magnets. La, Al, and Cu were dissolved in the Nd-rich grain boundary phase (GBP) rather than in the main phase, thereby thickening the GBP. This resulted in a difference in the coercivity gain between PAC-GBDP (+6.4 kOe) and LAC-GBDP (+3.3 kOe). The point to note here is that the remanence reduction induced by LAC-GBDP (-0.2 kG) is much smaller than that induced by PAC-GBDP (-1.2 kG) because the grain boundary diffused La-Al-Cu, which can dilute the saturation magnetization of the Nd2Fe14B 2 Fe 14 B (2-14-1) crystal, does not dissolve into 2-14-1. Furthermore, the squareness of demagnetization curves of the LAC-GBDP magnets (98%) was much improved than that of the PAC-GBDP magnets (86%). This is because chemically induced liquid film migration (CILFM), an undesirable grain growth phenomenon induced by shell formation, does not occur in LAC-GBDP magnets. In conclusion, the deterioration in remanence and squareness, which are serious problems in the LRE-GBDP, can be minimized by the LAC-GBDP; thus, the utilization of La in the GBDP is a promising method for obtaining a high maximum energy product of the magnets. Based on the results of this analytical work, we propose a guide for developing a cost-effective novel GBDP source that can prevent grain growth by CILFM and increase the magnetocrystalline anisotropy of the shell. | Jang, Ye Ryeong; Kim, Tae-Hoon; Kim, Jeongmin; Lee, Hyun-sook; Lee, Kyungmi; Roh, Jong Wook; Jang, Tae-Suk; Lee, Wooyoung | Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea; Korea Inst Mat Sci, Dept Magnet Mat, Chang Won 51508, South Korea; Daegu Gyeongbuk Inst Sci & Technol, Div Nanotechnol, Daegu 42988, South Korea; Kyungpook Natl Univ, Sch Nano & Mat Sci & Engn, Sangju 37224, Gyeongsangbuk D, South Korea; Sunmoon Univ, Dept Adv Mat Engn, Asan 336708, South Korea | Kim, Chang-Hoon/D-7205-2016 | 57976006900; 58597904500; 57203325094; 59475291400; 57281861700; 25638796100; 7102426010; 55498383000 | wooyoung@yonsei.ac.kr; | MATERIALS CHARACTERIZATION | MATER CHARACT | 1044-5803 | 1873-4189 | 216 | SCIE | MATERIALS SCIENCE, CHARACTERIZATION & TESTING;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2024 | 5.5 | 6.8 | 0.65 | 2025-05-07 | 4 | 4 | Nd-Fe-B; Grain boundary diffusion; Light rare-earth; LRE-Al-Cu; Chemically induced liquid film migration | CHEMICALLY-INDUCED MIGRATION; COERCIVITY ENHANCEMENT; LIQUID-FILMS; ELEMENTS; HEAT | Chemically induced liquid film migration; Grain boundary diffusion; Light rare-earth; LRE-Al-Cu; Nd-Fe-B | Aluminum alloys; Binary alloys; Coercive force; Cooling; Copper alloys; Deterioration; Diffusion; Electron probe microanalysis; Grain boundaries; Grain growth; High resolution transmission electron microscopy; Iron alloys; Liquid films; Melting; Neodymium alloys; Rare earths; Remanence; Saturation magnetization; Shells (structures); Sintering; Chemically induced liquid film migration; Diffusion process; Grain boundary phasis; Grain-boundary diffusion; Light rare earths; Liquid film migrations; Low melting; LRE-al-cu; Nd-Fe-B; Nd-Fe-B sintered magnets; Scanning electron microscopy | English | 2024 | 2024-10 | 10.1016/j.matchar.2024.114249 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Modification of RuO2 nanosheet microstructure via hydrogen plasma treatment for transparent electrode applications | Although monolayer RuO2 nanosheets exhibit semiconducting characteristics, their conductivity must be improved to enable application in transparent electrodes. In this study, RuO2 nanosheet microstructures are modified through H2 plasma treatment to reduce sheet resistance without deteriorating the optical characteristics necessary for flexible transparent electrode applications. Microstructural and chemical changes in the RuO2 nanosheets are observed using monochromator Cs-corrected high-resolution transmission electron microscopy combined with electron energy loss spectroscopy. Single-crystalline RuO2 nanosheets are transformed into nanometer-sized polycrystalline nanosheets. The phase-transformed polycrystalline RuO2 nanosheets contain newly formed defects such as grain boundaries and O vacancies, which result in lower sheet resistances because these defects provide leakage-current paths in the semiconducting RuO2 nanosheets. These defects are located parallel to the direction of light transmission. Consequently, transparency and haze do not significantly deteriorate after H2 plasma treatment. These results indicate that the H2 plasma creates a more stable O-vacancy row which alters the microstructure of the RuO2 nanosheets. Our results demonstrate that H2 plasma treatment can be widely used to fabricate two-dimensional material-based transparent electrodes. | Ko, Dong-Su; Sul, Soohwan; Jung, Changhoon; Cho, Eunae; Jung, Doh Won; Park, Hee Jung; Yun, Dong-Jin; Kim, Se Yun; Roh, Jong Wook | Samsung Adv Inst Technol, Analyt Engn Grp, Suwon 16678, South Korea; Samsung Elect, Proc Simulat Grp, Hwaseong 18448, South Korea; Samsung Adv Inst Technol, Battery Mat TU, Suwon 16678, South Korea; Dankook Univ, Dept Mat Sci & Engn, Cheonan 31116, South Korea; Gyeongsang Natl Univ, Dept Mat Engn & Convergence Technol, Jinju 52828, South Korea; Kyungpook Natl Univ, Sch Nano & Mat Sci & Engn, Sangju 37224, South Korea | Ko, Dong-Su/AAZ-5644-2020 | 25641304500; 7005539277; 55747781500; 57206764827; 12804624000; 7601568847; 22935923900; 57203210313; 25638796100 | seyun@gnu.ac.kr;jw.roh@knu.ac.kr; | MATERIALS CHARACTERIZATION | MATER CHARACT | 1044-5803 | 1873-4189 | 218 | SCIE | MATERIALS SCIENCE, CHARACTERIZATION & TESTING;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2024 | 5.5 | 6.8 | 0 | 2025-05-07 | 0 | 0 | Nanosheet; Transparent electrode; H 2 plasma; Density functional theory | CONDUCTIVITY; RUTHENATE; BEHAVIOR | Density functional theory; H<sub>2</sub> plasma; Nanosheet; RuO<sub>2</sub>; Transparent electrode | Carrier concentration; Electron energy analyzers; Electron energy loss spectroscopy; Electron scattering; High resolution transmission electron microscopy; Nanosheets; Photodissociation; Plasma applications; Ruthenium compounds; Transparent electrodes; Vacancies; Density-functional-theory; H2 plasma; Hydrogen plasma treatments; Microstructural changes; O vacancies; Optical characteristics; Plasma treatment; Polycrystalline; RuO 2; Transparent electrode; Grain boundaries | English | 2024 | 2024-12 | 10.1016/j.matchar.2024.114587 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Article | Potential use of dried persimmon (Diospyros kaki) byproducts as feed sources for ruminants | The aim of this study was to evaluate the chemical composition, in vitro digestibility, and palatability of dried persimmon byproducts (persimmon peel [PP] and damaged whole persimmons [WP]) ensiled with rice straw in different mixing ratios. PP and WP were ensiled with rice straw at ratios of 3:7 (PP3R7, WP3R7), 5:5 (PP5R5, WP5R5), 7:3 (PP7R3, WP7R3), and 8:2 (PP8R2, WP8R2) for 70 d. WP3R7 had the highest (p < 0.05) crude protein and lactate contents compared to the other combinations. On the other hand, PP3R7 and PP8R2 had lower concentrations of neutral and acid-detergent fibers (p < 0.05) and produced lower amounts of ammonia-N (p < 0.05). The silages were compared to rice straw silage (RS), maize silage (MS), whole-crop rye silage (WCRS), and sorghum-sudangrass silage (SSGS) during an in vitro study. The results showed that PP8R2 and WP7R3 had higher (p < 0.05) dry matter digestibility values than RS, MS, WCRS, and SSGS in a 6 h incubation period. In addition, a palatability test of the silages was conducted on Hanwoo cattle, goats, and deer, using the cafeteria method. The palatability index rate of PP7R3 was the highest (p < 0.05) for the goats and the Hanwoo cattle, whereas PP8R2 had the highest (p < 0.05) rate for the deer and the Hanwoo cattle. In conclusion, dried persimmon byproducts in the form of PP and WPs can be used as ruminant feed when ensiled with RS at ratios of 7:3 and 8:2. | Lee, Sang Moo; Marbun, Tabita Dameria; Kim, Eun Joong | Kyungpook Natl Univ, Dept Anim Sci & Biotechnol, Sangju 37224, South Korea; Kyungpook Natl Univ, Res Inst Innovat Anim Sci, Sangju 37224, South Korea | ; Kim, Eun Joong/HGF-1639-2022 | ejkim2011@knu.ac.kr; | JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY | J ANIM SCI TECHNOL | 2672-0191 | 2055-0391 | 66 | 4 | SCIE | AGRICULTURE, DAIRY & ANIMAL SCIENCE;VETERINARY SCIENCES | 2024 | 3.2 | 6.8 | 1 | Dried persimmon byproducts; In vitro; Palatability; Ruminants; Silage | VITRO GAS-PRODUCTION; RICE STRAW; IN-VITRO; FERMENTATION QUALITY; CHEMICAL-COMPOSITION; BACTERIAL INOCULANT; RUMEN FERMENTATION; SILAGE QUALITY; DIETARY FIBER; DIGESTIBILITY | English | 2024 | 2024 | 10.5187/jast.2023.e83 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | ○ | Article | Standardized ileal digestible methionine requirements for 22 to 29-d-old male broilers based on the growth performance and feather development | The aim of the present experiment was to determine the standardized ileal digestible (SID) methionine (Met) requirement during the grower phase (22 to 29 days). A total of 192 Ross 308 male broilers (745 +/- 50.5 g) were assigned to six dietary treatments in a randomized complete block design, with eight replicate cages per treatment. The experimental diets were formulated based on corn, soybean meal, and synthetic amino acids (AA), with different levels of dietary SID Met ranging from 0.40% to 0.65%, in increments of 0.05%. Individual body weight and feed intake per cage were measured at the beginning and end of the experimental period. Weight gain (g/bird), feed intake (g/bird), gain-to-feed ratio (g/kg), feather weight (g), and relative feather percentage (% of body weight) were analyzed for linear or quadratic responses using orthogonal polynomial contrasts. Final body weight, weight gain, and feed intake increased quadratically as dietary SID Met concentration increased (p < 0.05). However, the composition of AA in the feathers showed no quadratic or linear effect based on dietary SID Met concentrations, except for Ile (p = 0.05; quadratic). The SID Met requirements for optimum and maximum weight gain of 22 to 29-days-old male broilers were estimated using the broken-line and quadratic-line models to 0.45% and 0.55%, respectively. | An, Su Hyun; Kong, Changsu | Kyungpook Natl Univ, Dept Anim Sci & Biotechnol, Sangju 37224, South Korea; Kyungpook Natl Univ, Res Inst Innovat Anim Sci, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Anim Sci, Sangju 37224, South Korea | 안, 수현/JFK-5079-2023 | 57216974969; 36027521600 | changsukong@knu.ac.kr; | JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY | J ANIM SCI TECHNOL | 2672-0191 | 2055-0391 | 66 | 3 | SCIE | AGRICULTURE, DAIRY & ANIMAL SCIENCE;VETERINARY SCIENCES | 2024 | 3.2 | 6.8 | 0.68 | 2025-05-07 | 1 | 1 | Amino acid; Broiler; Methionine; Requirement; Standardized ileal digestible | AMINO-ACID-REQUIREMENTS; CYSTINE REQUIREMENT; CRUDE PROTEIN; PLUS CYSTINE; FEED-INTAKE; CHICKS; DIETS; DEFICIENCY; POULTRY; PERIOD | Amino acid; Broiler; Methionine; Requirement; Standardized ileal digestible | English | 2024 | 2024 | 10.5187/jast.2023.e139 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Review | Transplantation of spermatogonial stem cells in stallions | Spermatogonial stem cells originate from gonocytes and undergo self-renewal and differentiation to generate mature spermatozoa via spermatogenesis in the seminiferous tubules of the testis in male mammals. Owing to the unique capacity of these cells, the spermatogonial stem cell transplantation technique, which enables the restoration of male fertility by transfer of germlines between donor and recipient males, has been developed. Thus, spermatogonial stem cell transplantation can be used as an important next-generation reproductive and breeding tool in livestock production. However, in large animals, this approach is associated with many technical limitations and inefficiency. Furthermore, research regrading spermatogonial stem cell transplantation in stallions is limited. Therefore, this review article describes the history and current knowledge regarding spermatogonial stem cell transplantation in animals and challenges in establishing an experimental protocol for successful spermatogonial stem cell transplantation in stallions, which have been presented under the following heads: spermatogonial stem cell isolation, recipient preparation, and spermatogonial stem cell transplantation. Additionally, we suggest that further investigation based on previous unequivocal evidence regarding donor-derived spermatogenesis in large animals must be conducted. A detailed and better understanding of the physical and physiological aspects is required to discuss the current status of this technique field and develop future directions for the establishment of spermatogonial stem cell transplantation in stallions. | Jung, Heejun; Yoon, Minjung | Kyungpook Natl Univ, Res Ctr Horse Ind, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Horse Compan & Wild Anim Sci, Sangju 37224, South Korea | 56374279800; 22137296500 | mjyoonemail@gmail.com; | JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY | J ANIM SCI TECHNOL | 2672-0191 | 2055-0391 | 66 | 4 | SCIE | AGRICULTURE, DAIRY & ANIMAL SCIENCE;VETERINARY SCIENCES | 2024 | 3.2 | 6.8 | 0 | 2025-05-07 | 0 | 0 | Spermatogonial stem cells; Transplantation; Germ cells; Rete testis; Stallions | LONG-TERM PROPAGATION; DONOR-DERIVED SPERM; IN-VITRO CULTURE; GERM-CELL; ROUND SPERMATIDS; TESTICULAR CELLS; A SPERMATOGONIA; PUTATIVE MARKER; SPERMATOGENESIS; TESTES | Germ cells; Rete testis; Spermatogonial stem cells; Stallions; Transplantation | English | 2024 | 2024 | 10.5187/jast.2024.e30 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | Article | Urbanization and the excess mortgage risk – an optimal mortgage model | This study investigates the optimal mortgage level and examines the impact of urbanization on the risk of excessive mortgage loan in China’s housing markets. We propose a new model to theoretically derive and measure both the optimal mortgage level and the degree of urbanization across different regions of China. The paper tests two hypotheses: first, whether urbanization directly increases the risk of excess mortgages, and second, whether urbanization indirectly contributes to this risk through its effect on housing prices. Using a fixed-effects model for panel data analysis, the generalized method of moments (GMM), and monthly data from 25 regional provinces in China spanning from 2007 to 2019, our results provide strong evidence in support of these hypotheses. The impact of urbanization varies across regions, suggesting that distinct policy interventions may be needed for different regional housing markets. © The Author(s) 2024. | Zhang, Hongxia; Kim, Heeho | School of Economics, Shandong Normal University, 88 East Wenhua Road, Shandong, Jinan, China; School of Economics and Trade, Graduate School Department of International Trade, Kyungpook National University, Daehak-Ro 80, Bukgu, Daegu, South Korea | 57199714616; 36727893700 | kimhh@knu.ac.kr; | Humanities and Social Sciences Communications | HUM SOC SCI COMMUN | N/A | 2662-9992 | 11 | 1 | SSCI;AHCI | SOCIAL SCIENCES, INTERDISCIPLINARY;HUMANITIES, MULTIDISCIPLINARY | 2024 | 3.6 | 6.8 | 0 | 2025-05-07 | 0 | English | Final | 2024 | 10.1057/s41599-024-04277-7 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | ○ | Article | Activating the Mn Single Atomic Center for an Efficient Actual Active Site of the Oxygen Reduction Reaction by Spin-State Regulation | The ligand engineering for single-atom catalysts (SACs) is considered a cutting-edge strategy to tailor their electrocatalytic activity. However, the fundamental reasons underlying the reaction mechanism and the contemplation for which the actual active site for the catalytic reaction depends on the pyrrolic and pyridinic N ligand structure remain to be fully understood. Herein, we first reveal the relationship between the oxygen reduction reaction (ORR) activity and the N ligand structure for the manganese (Mn) single atomic site by the precisely regulated pyrrolic and pyridinic N4 coordination environment. Experimental and theoretical analyses reveal that the long Mn-N distance in Mn-pyrrolic N4 enables a high spin state of the Mn center, which is beneficial to reduce the adsorption strength of oxygen intermediates by the high filling state in antibond orbitals, thereby activating the Mn single atomic site to achieve a half-wave potential of 0.896 V vs RHE with outstanding stability in acidic media. This work provides a new fundamental insight into understanding the ORR catalytic origin of Mn SACs and the rational design strategy of SACs for various electrocatalytic reactions. | Kim, Kiwon; Kim, Gyuchan; Jeong, Taeyoung; Lee, Wonyoung; Yang, Yunho; Kim, Byung-Hyun; Kim, Bubryur; Lee, Byeongyong; Kang, Joonhee; Kim, Myeongjin | Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, Daegu 41566, South Korea; Hanyang Univ ERICA, Ctr Bionano Intelligence Educ & Res, Dept Appl Chem, Ansan 15588, Gyeonggi Do, South Korea; Hanyang Univ ERICA, Dept Chem & Mol Engn, Ansan 15588, Gyeonggi Do, South Korea; Kyungpook Natl Univ, Dept Robot & Smart Syst Engn, Daegu 41566, South Korea; Pusan Natl Univ, Sch Mech Engn, Busan 46241, South Korea; Pusan Natl Univ, Dept Nano Fus Technol, Busan 46241, South Korea; Pusan Natl Univ, Dept Nanoenergy Engn, Busan 46241, South Korea | Kim, Gyuchan/MFI-9577-2025; Kim, Byung-Hyun/HGB-5885-2022; Kang, Joonhee/AAO-7561-2021 | 59395834000; 58752137900; 58681517200; 57195940408; 59396075100; 55502655900; 57198355299; 57189871331; 56076915900; 55541419000 | j.kang@pusan.ac.kr;myeongjinkim@knu.ac.kr; | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | J AM CHEM SOC | 0002-7863 | 1520-5126 | 146 | 49 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2024 | 15.6 | 6.9 | 2.2 | 2025-05-07 | 25 | 24 | CO | Alkylation; Chemical activation; Design for testability; Electrocatalysis; Electrolytic reduction; Manganese alloys; Manganese compounds; Oxygen cutting; Oxygen reduction reaction; Reaction intermediates; manganese; oxygen; Active site; Atomic sites; Ligand structure; N ligands; N-ligands; Oxygen reduction reaction; Pyridinic; Pyrrolic; Single-atoms; ]+ catalyst; absorption spectroscopy; Article; attenuated total reflection surface enhanced infrared absorption spectroscopy; chronoamperometry; electrocatalysis; electron spin resonance; energy dispersive X ray spectroscopy; extended X ray absorption fine structure spectroscopy; field emission scanning electron microscopy; high resolution transmission electron microscopy; inductively coupled plasma mass spectrometry; infrared absorption spectroscopy; magnetism; nanofabrication; oxidation reduction reaction; oxygen reduction reaction; scanning transmission electron microscopy; spin state regulation; transmission electron microscopy; X ray absorption near edge structure spectroscopy; X ray diffraction; X ray photoemission spectroscopy; adsorption; article; atom; catalysis; catalyst; controlled study; nonhuman; reaction analysis; regulatory mechanism; Ligands | English | 2024 | 2024-11-05 | 10.1021/jacs.4c13137 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Activationless Charge Transfer Drives Photocurrent Generation in Organic Photovoltaic Blends Independent of Energetic Offset | Organic photovoltaics (OPVs) have recently shown substantial progress in enhancing device efficiency, driven in particular by advances in the design of nonfullerene acceptors and the reduction of the energy offset driving exciton separation at the donor/acceptor interface. Herein, we employ temperature-dependent transient absorption spectroscopy to investigate the activation energy for charge generation and recombination in a range of bulk heterojunction blends with nonfullerene acceptors. Remarkably, we find that in all cases charge generation is almost activationless, in the range of 11-21 meV, independent of energetic offset. Geminate recombination is also observed to be almost activationless, with only the kinetics of bimolecular charge recombination being strongly temperature-dependent, with an activation energy >400 meV. Our observation of essentially activationless charge generation, independent of energy offset, strongly indicates that charge generation in such blends does not follow Marcus theory but can rather be considered an adiabatic process associated with the motion of thermally unrelaxed carriers. | Dong, Yifan; Zheng, Rui; Qian, Deping; Lee, Tack Ho; Bristow, Helen L.; Shakya Tuladhar, Pabitra; Cha, Hyojung; Durrant, James R. | Imperial Coll London, Dept Chem, London W12 0BZ, England; Imperial Coll London, Ctr Processable Elect, London W12 0BZ, England; Fujian Normal Univ, Straits Inst Flexible Elect SIFE, Future Technol, Fuzhou 350117, Fujian, Peoples R China; Pusan Natl Univ, Inst Plast Informat & Energy Mat, Sustainable Utilizat Photovolta Energy Res Ctr, Dept Chem Educ,Grad Dept Chem Mat, Busan 46241, South Korea; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, Daegu 41566, South Korea; Swansea Univ, SPECIFIC, Swansea SA1 8EN, Wales; Swansea Univ, Dept Mat Sci & Engn, Swansea SA1 8EN, Wales | Lee, Tack Ho/K-9898-2016; Dong, Yifan/JFK-6237-2023; Durrant, James/A-6198-2009; 钱, 德平/AAE-8586-2022 | 57207011215; 59452718000; 43861835800; 55980685000; 57189599980; 37023635800; 35885242200; 56401622800 | hcha@knu.ac.kr;j.durrant@imperial.ac.uk; | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | J AM CHEM SOC | 0002-7863 | 1520-5126 | 146 | 49 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2024 | 15.6 | 6.9 | 0.24 | 2025-05-07 | 3 | 3 | NON-FULLERENE ACCEPTORS; SOLAR-CELLS; EXCITON DIFFUSION; HETEROJUNCTIONS; PHOTOGENERATION; EFFICIENCY; IMPACT | Activation energy; Heterojunctions; Transient absorption spectroscopy; % reductions; Charge generation; Charge recombinations; Device efficiency; Donor/acceptor interface; Energy; Energy offset; Organic photovoltaics; Photocurrent generations; Temperature dependent; adiabaticity; article; controlled study; genetic recombination; kinetics; temperature; transient absorption spectroscopy; Photovoltaics | English | 2024 | 2024-11-27 | 10.1021/jacs.4c11114 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Cryogenic and Dissolution DNP NMR on γ-Irradiated Organic Molecules | Nuclear magnetic resonance (NMR) plays a central role in the elucidation of chemical structures but is often limited by low sensitivity. Dissolution dynamic nuclear polarization (dDNP) emerges as a transformative methodology for both solution-state NMR and metabolic NMR imaging, which could overcome this limitation. Typically, dDNP relies on combining a stable radical with the analyte within a uniform glass under cryogenic conditions. The electron polarization is then transferred through microwave irradiation to the nuclei. The present study explores the use of radicals introduced via gamma-irradiation, as bearers of the electron spins that will enhance H-1 or C-13 nuclides. H-1 solid-state NMR spectra of gamma-irradiated powders at 1-5 K revealed, upon microwave irradiation, signal enhancements that, in general, were higher than those achieved through conventional glass-based DNP. Transfer of these samples to a solution-state NMR spectrometer via a rapid dissolution driven by a superheated water provided significant enhancements of solution-state H-1 NMR signals. Enhancements of C-13 signals in the gamma-irradiated solids were more modest, as a combined consequence of a low radical concentration and of the dilute concentration of C-13 in the natural abundant samples examined. Nevertheless, ca. 700-800-fold enhancements in C-13 solution NMR spectra of certain sites recorded at 11.7 T could still be achieved. A total disappearance of the radicals upon performing a dDNP-like aqueous dissolution and a high stability of the samples were found. Overall, the study showcases the advantages and limitations of gamma-irradiated radicals as candidates for advancing spectroscopic dDNP-enhanced NMR. | Giannoulis, Angeliki; Butbul, Korin; Carmieli, Raanan; Kim, Jihyun; Montrazi, Elton Tadeu; Singh, Kawarpal; Frydman, Lucio | Weizmann Inst Sci, Dept Chem & Biol Phys, IL-7610001 Rehovot, Israel; Weizmann Inst Sci, Dept Chem Res Support, IL-7610001 Rehovot, Israel; Kyungpook Natl Univ, Dept Chem Educ, Daegu 41566, South Korea; Univ Cambridge, Yusuf Hamied Dept Chem, Cambridge CB2 1EW, England | Montrazi, Elton Tadeu/NGR-7404-2025 | 55763272700; 59225683700; 6506286990; 56954528100; 57189509067; 57189875653; 7005152784 | angeliki.giannoulis@weizmann.ac.il;lucio.frydman@weizmann.ac.il; | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | J AM CHEM SOC | 0002-7863 | 1520-5126 | 146 | 30 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2024 | 15.6 | 6.9 | 0 | 2025-05-07 | 0 | 0 | DYNAMIC NUCLEAR-POLARIZATION; SOLID-STATE; CROSS-POLARIZATION; POLARIZING AGENTS; SPECTROSCOPY; RADIATION; RADICALS; WATER; C-13; EPR | Cryogenics; Dissolution; Electron spin resonance spectroscopy; Electrospinning; Irradiation; Microwave irradiation; Nuclear magnetic resonance; Nuclear magnetic resonance spectroscopy; Spectrometers; Spin dynamics; 2,4 dinitrophenol; carbon 13; glass; Dissolution DNP; Dissolution dynamics; Dynamic nuclear polarization; Low sensitivity; Magnetic resonance spectra; Microwave- irradiations; Nuclear magnetic resonance imaging; Organic molecules; Solution state nuclear magnetic resonance; γ-irradiated; Article; carbon nuclear magnetic resonance; concentration (parameter); dissolution; dissolution dynamic nuclear polarization; frequency; gamma radiation; geometry; microwave irradiation; nonhuman; nuclear magnetic resonance imaging; physical chemistry; polarization; proton nuclear magnetic resonance; article; chemical structure; controlled study; electron; gamma irradiation; irradiation; nuclear magnetic resonance; nuclear magnetic resonance imaging; pharmaceutics; powder; solid state; spectrometer; spectroscopy; water; Glass | English | 2024 | 2024-07-19 | 10.1021/jacs.4c04041 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Crystal Structure and Molecular Mechanism of Isocitrate Lyase from Chloroflexus aurantiacus | Chloroflexus aurantiacus is a green, nonsulfur bacterium that employs the 3-hydroxypropionate cycle to grow, using carbon dioxide/bicarbonate as its primary carbon source. Like most bacteria, it possesses the glyoxylate cycle, facilitated by malate synthase and isocitrate lyase (ICL), allowing a "tricarboxylic acid cycle" bypass. C. aurantiacus also harbors ICL, an enzyme that catalyzes reversible isocitrate cleavage into glyoxylate and succinate. This study presents the crystal structures of C. aurantiacus-derived ICL (CaICL), in its Mg2+-bound and Mn2+ and isocitrate-bound forms, elucidating its substrate-binding mechanism and catalytic loop dynamics. CaICL forms a homotetramer and interacts with isocitrate via critical active-site residues, revealing its catalytic mechanism. The stabilization of the catalytic loop and adjacent terminal regions upon isocitrate binding underscores its functional significance. These findings advance our understanding regarding ICL enzymes, offering a basis for future investigations into their biological roles and potential applications. | Lee, Seul Hoo; Park, Jiyoung; Kim, Kyung-Jin | Kyungpook Natl Univ, Sch Life Sci, BK21 FOUR KNU Creat Biores Grp, Daegu 41566, South Korea; Kyungpook Natl Univ, KNU Inst Microorganisms, Daegu 41566, South Korea | Kim, Kyung-Jin/MVY-3405-2025; Park, Jiyoung/MVY-3895-2025 | 57205261937; 56188468900; 55510867400 | kkim@knu.ac.kr; | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | J AGR FOOD CHEM | 0021-8561 | 1520-5118 | 72 | 41 | SCIE | AGRICULTURE, MULTIDISCIPLINARY;CHEMISTRY, APPLIED;FOOD SCIENCE & TECHNOLOGY | 2024 | 6.2 | 6.9 | 0 | 2025-05-07 | 0 | 0 | Chloroflexus aurantiacus; carbon fixationbacteria; isocitrate lyase; catalytic mechanism; catalytic loop movement | GLYOXYLATE CYCLE; POTENTIAL TARGET; CARBON FIXATION; EXPRESSION; CATALYSIS; PATHWAYS; INSIGHT; ENZYME; COLI | carbon fixation bacteria; catalytic loop movement; catalytic mechanism; Chloroflexus aurantiacus; isocitrate lyase | Catalysis; Carbon fixation; Carbon fixation bacteria; Catalytic loop movement; Catalytic mechanisms; Chloroflexus aurantiacus; Crystals structures; Isocitrate lyase; Isocitrates; Loop movement; Molecular mechanism; Carbon dioxide | English | 2024 | 2024-10-02 | 10.1021/acs.jafc.4c05677 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Effect of temperature and relative humidity on hydrolytic degradation of additively manufactured PLA: Characterization and artificial neural network modeling | Understanding the long-term durability of 3D-printed polymeric materials under varying temperature and humidity conditions is essential for expanding their industrial applications. Therefore, it is critical to assess the impact of degradation on mechanical properties such as tensile strength. In this study, we manufactured specimens with dual orientations by additive manufacturing-based 3D printing and subjected them to accelerated degradation under various temperature and humidity conditions to evaluate their durability in degradation environments. Mechanical properties significantly decreased under the most severe conditions, with a maximum reduction of 76.7 % observed in molecular weight. The deconvolution of the molecular weight distribution and its correlation with mechanical properties were thoroughly investigated. We derived an equation representing the relationship between the peaks obtained from deconvoluting the molecular weight distribution and the tensile strength. Furthermore, to expedite and simplify tensile strength assessment, we trained an artificial neural network (ANN) model using tensile test results to construct a predictive model. The ANN utilized temperature, humidity, printing angle, and time as input data, with tensile strength as the output. Validation of this model demonstrated the capability to predict tensile strength accurately under different temperature and humidity conditions. | Lee, Suha; Wee, Jung-Wook | Kumoh Natl Inst Technol, Dept Mech Engn, 61 Daehak Ro, Gumi 39177, Gyeongbuk, South Korea; Kyungpook Natl Univ, Coll Engn, Sch Mech Engn, 80 Daehak Ro, Daegu 41566, South Korea | 59326967500; 56673775300 | jwwee@knu.ac.kr; | POLYMER DEGRADATION AND STABILITY | POLYM DEGRAD STABIL | 0141-3910 | 1873-2321 | 230 | SCIE | POLYMER SCIENCE | 2024 | 7.4 | 6.9 | 0.69 | 2025-05-07 | 6 | 6 | Additive manufacturing; Accelerated degradation; Polylactic acid; Hydrolysis; Artificial neural network; Chain scission | MECHANICAL-PROPERTIES; COMPRESSIVE STRENGTH; PREDICTION; CRYSTALLIZATION; KINETICS; PARTS | Accelerated degradation; Additive manufacturing; Artificial neural network; Chain scission; Hydrolysis; Polylactic acid | Tensile strength; Accelerated degradation; Artificial neural network modeling; Chain scission; Humidity conditions; Mechanical; Neural-networks; Polylactic acid; Property; Temperature and humidities; Temperature conditions; Tensile testing | English | 2024 | 2024-12 | 10.1016/j.polymdegradstab.2024.111055 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Elucidating Singlet-Fission-Born Multiexciton Dynamics via Molecular Engineering: A Dilution Principle Extended to Quintet Triplet Pair | Multiexciton in singlet exciton fission represents a critical quantum state with significant implications for both solar cell applications and quantum information science. Two distinct fields of interest explore contrasting phenomena associated with the geminate triplet pair: one focusing on the persistence of long-lived correlation and the other emphasizing efficient decorrelation. Despite the pivotal nature of multiexciton processes, a comprehensive understanding of their dependence on the structural and spin properties of materials is currently lacking in experimental realizations. To address this gap in knowledge, molecular engineering was employed to modify the TIPS-tetracene structures, enabling an investigation of the structure-property relationships in spin-related multiexciton processes. In lieu of the time-resolved electron paramagnetic resonance technique, two time-resolved magneto-optical spectroscopies were implemented for quantitative analysis of spin-dependent multiexciton dynamics. The utilization of absorption and fluorescence signals as complementary optical readouts, in the presence of a magnetic field, provided crucial insights into geminate triplet pair dynamics. These insights encompassed the duration of multiexciton correlation and the involvement of the spin state in multiexciton decorrelation. Furthermore, simulations based on our kinetic models suggested a role for quintet dilution in multiexciton dynamics, surpassing the singlet dilution principle established by the Merrifield model. The integration of intricate model structures and time-resolved magneto-optical spectroscopies served to explicitly elucidate the interplay between structural and spin properties in multiexciton processes. This comprehensive approach not only contributes to the fundamental understanding of these processes but also aligns with and reinforces previous experimental studies of solid states and theoretical assessments. | Kim, Juno; Teo, Hao Ting; Hong, Yongseok; Cha, Hyojung; Kim, Woojae; Chi, Chunyan; Kim, Dongho | Yonsei Univ, Dept Chem, Spect Lab Funct p Elect Syst, Seoul 03722, South Korea; Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, Daegu 41566, South Korea | ; , dongho/KIK-0073-2024; Y., Chun/H-8684-2013; Chi, Chunyan/H-8684-2013; Kim, Woojae/JYQ-4232-2024 | 57216885839; 57190073734; 56799532300; 35885242200; 56510595800; 7401898831; 58476170300 | chmcc@nus.edu.sg;dongho@yonsei.ac.kr; | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | J AM CHEM SOC | 0002-7863 | 1520-5126 | 146 | 15 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2024 | 15.6 | 6.9 | 0.73 | 2025-05-07 | 3 | 3 | EXCITON FISSION; CHARGE-TRANSFER; CRYSTALLINE TETRACENE; SPIN POLARIZATION; STATES; PENTACENE; FLUORESCENCE; ANNIHILATION; CONVERSION; EXCHANGE | Dynamics; Electron spin resonance spectroscopy; Excitons; Model structures; Paramagnetic resonance; Quantum optics; Spin dynamics; Structural properties; oligomer; De correlations; Decorrelations; Dilution principle; Magneto-optical spectroscopy; Molecular engineering; Multiexcitons; Quantum state; Singlet fissions; Spin properties; Time-resolved; analysis; Article; deoxygenation; dynamics; electron spin resonance; genetic engineering; human; kinetics; magneto transient absorption spectroscopy; molecular dynamics; optically detected magnetic resonance; prevalence; quantitative analysis; simulation; singlet fission born multi exciton dynamics; spectroscopy; steady state spectroscopy; time series analysis; triplets; absorption; article; dilution; duration; fluorescence; magnetic field; solar cell; solid state; triplets; Fluorescence | English | 2024 | 2024-04-05 | 10.1021/jacs.4c01326 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Higuchi fractal dimension and deep learning on near-infrared spectroscopy for determination of free fatty acid (FFA) content in oil palm fruit | Free fatty acid (FFA) content is an essential parameter with a significant influence on the quality of oil palm, with lower levels showing higher quality. The measurement of this parameter is often carried out with conventional methods in chemical laboratories using solvents and reagents, but these techniques have several limitations. Therefore, this study aimed to develop a rapid and non-destructive technique for determining FFA content based on near-infrared (NIR) spectroscopy. This technique comprised the use of Higuchi fractal dimension (HFD) and deep learning to process NIR spectra as a new chemometric analysis. The sample population consisted of 350 oil palm fruits at various maturity ages collected from the Cikabayan Oil Palm Plantation. Each sample had its NIR spectrum acquired with a wavelength of 1000-1500 nm. Good performance was shown by a low root mean squared error (RMSE) value and a high coefficient of determination (R-2). Based on numerical analysis, this study proposed HFD with a maximum discrete time interval (kmax) value of 10 and deep learning with long short-term memory (LSTM) as a robust architectural model. The results showed that the proposed technique could predict oil palm fruit FFA levels with RMSE and R-2 values of 0.167 and 0.959, respectively. Furthermore, it could identify FFA content at each process step, before and after harvesting. Based on these results, its implementation in oil palm control management was expected to enhance effectiveness and efficiency, leading to the production of high-quality products. | Nanda, Muhammad Achirul; Amaru, Kharistya; Rosalinda, S.; Novianty, Inna; Sholihah, Walidatush; Mindara, Gema Parasti; Faricha, Anifatul; Park, Tusan | Univ Padjadjaran, Fac Agroind Technol, Dept Agr & Biosyst Engn, Sumedang 45363, Indonesia; IPB Univ, Coll Vocat Studies, Comp Engn Study Program, Bogor 16680, Indonesia; Telkom Univ, Dept Elect Engn, Surabaya 60231, Indonesia; Kyungpook Natl Univ, Dept Bioind Machinery Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Smart Agr Innovat Ctr, Daegu 41566, South Korea | ; Sholihah, Walidatush/CAF-3490-2022; Park, Tusan/C-2057-2012; Novianty, Inna/GPK-6178-2022 | 57200192678; 57216288468; 57209024630; 57206896597; 56026755900; 57226075396; 57193357349; 57202780408 | m.achirul@unpad.ac.id; | JOURNAL OF AGRICULTURE AND FOOD RESEARCH | J AGR FOOD RES | 2666-1543 | 18 | ESCI | AGRICULTURE, MULTIDISCIPLINARY;FOOD SCIENCE & TECHNOLOGY | 2024 | 6.2 | 6.9 | 1.25 | 2025-05-07 | 3 | 4 | Near-infrared spectroscopy; Nondestructive evaluation; Fresh fruit bunch; Deep learning | BUNCHES; QUALITY; SENSOR; TIME | Deep learning; Fresh fruit bunch; Near-infrared spectroscopy; Nondestructive evaluation | English | 2024 | 2024-12 | 10.1016/j.jafr.2024.101437 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Intelligent Electrospinning Nanofibrous Membranes for Monitoring and Promotion of Wound Healing | The incidence of chronic wound healing is promoted by the growing trend of elderly population, obesity, and type II diabetes. Although numerous wound dressings have been studied over the years, it is still challenging for many wound dressings to perfectly adapt to the healing process due to the dynamic and complicated wound microenvironment. Aiming at an optimal reproduction of the physiological environment, multifunctional electrospinning nanofibrous membranes (ENMs) have emerged as a promising platform for the wound treatment owing to their resemblance to extracellular matrix (ECM), adjustable preparation processes, porousness, and good conformability to the wound site. Moreover, profiting from the booming development of human-machine interaction and artificial intelligence, a next generation of intelligent electrospinning nanofibrous membranes (iENMs) based wound dressing substrates that could realize the real-time monitoring of wound proceeding and individual-based wound therapy has evoked a surge of interest. In this regard, general wound-related biomarkers and process are overviewed firstly and representative iENMs stimuli-responsive materials are briefly summarized. Subsequently, the emergent applications of iENMs for the wound healing are highlighted. Finally, the opportunities and challenges for the development of next-generation iENMs as well as translating iENMs into clinical practice are evaluated. | Qu, Zhi; Wang, Yang; Dong, Yanhong; Li, Xinmeng; Hao, Lingwan; Sun, Liwei; Zhou, Lu; Jiang, Rujian; Liu, Weihua | Shandong First Med Univ & Shandong Acad Med Sci, Sch Nursing, Tai An 271016, Shandong, Peoples R China; Shandong First Med Univ & Shandong Acad Med Sci, Sch Chem & Pharmaceut Engn, Tai An 271016, Peoples R China; Shandong First Med Univ & Shandong Acad Med Sci, Med Sci & Technol Innovat Ctr, Jinan 250117, Shandong, Peoples R China; Kyungpook Natl Univ, Sch Med, Cell & Matrix Res Inst, Dept Plast & Reconstruct Surg, Daegu 41944, South Korea | ; Li, Xinmeng/GYA-1089-2022 | 59131939300; 58890572000; 59131939500; 59890526400; 57225846468; 57199010566; 59131867900; 57194702150; 57217255743 | haolingwan@sdfmu.edu.cn;jiangrujian@sdfmu.edu.cn;wliu@sdfmu.edu.cn; | MATERIALS TODAY BIO | MATER TODAY BIO | 2590-0064 | 26 | SCIE | ENGINEERING, BIOMEDICAL;MATERIALS SCIENCE, BIOMATERIALS | 2024 | 10.2 | 6.9 | 3.01 | 2025-05-07 | 22 | 22 | Electrospinning nanofibrous membranes; Dressings; Wound healing; Intelligent; Real-time monitoring; Sensors | PH; REGENERATION; DRESSINGS; ALGINATE; RELEASE; DESIGN; FIBERS | Dressings; Electrospinning nanofibrous membranes; Intelligent; Real-time monitoring; Sensors; Wound healing | Cell proliferation; Nanofibers; Chronic wounds; Dressing; Elderly populations; Electrospinning nanofibrous membrane; Intelligent; Nanofibrous membranes; Population II; Real time monitoring; Wound dressings; Wound healing; Electrospinning | English | 2024 | 2024-06 | 10.1016/j.mtbio.2024.101093 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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