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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 | Photolytic quorum quenching effects on the microbial communities and functional gene expressions in membrane bioreactors | Photolytic quorumquenching by ultraviolet A (UVA) irradiation is an effective strategy for controlling membrane bioreactor (MBR) biofouling; however, its effects on MBR microbial communities and functional genes have not yet been explored. Here, we report on the effects of the UVA irradiation, which mitigates membrane biofouling, on the microbial community structures, alpha and beta diversities, and functional gene expressions in the MBR mixed liquor and biocake (membrane fouling layer) for the first time. The results show that the microbial communities become less diversified when alternating UVA is applied to the MBRs. The changes in the community structure are highly influenced by spatiotemporal factors, such as microbial habitats (mixed liquor and biocake) and reactor operation time, although UVA irradiation also has some impacts on the community. The relative abundance of the Sphingomonadaceae family, which can decompose the furan ring of autoinducer-2 (AI-2) signal molecules, becomes greater with continuous UVA irradiation. Xanthomonadaceae, which produces biofilm-degrading enzymes, is also more abundant with UVA photolysis than without it. Copies of monooxygenase and hydroxylase enzyme-related genes increase in the MBR with longer UVA exposures (i.e., continuous UVA). These enzymes seem to be inducible by UVA, enhancing the AI-2 inactivation. In conclusion, UVA irradiation alters the microbial community and the metabolism in the MBR, contributing to the membrane biofouling mitigation. | Zhang, Xiaolei; Park, Hyeona; Park, Yeong-Jun; Lee, Kibaek; Yu, Huarong; Shin, Jae-Ho; Choo, Kwang-Ho | Kyungpook Natl Univ, Adv Inst Water Ind, 80 Daehak Ro, Daegu 41566, South Korea; Shanghai Univ, Sch Environm & Chem Engn, 99 Shangda Rd, Shanghai 200444, Peoples R China; Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Extgine, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Agr & Life Sci, 80 Daehak Ro, Daegu 41566, South Korea; Chonnam Natl Univ, Dept Biotechnol & Bioengn, 77 Yongbong Ro, Gwangju 61186, South Korea; Guangzhou Univ, Sch Civil Engn, 230 Wai Huan Xi Rd, Guangzhou 510006, Peoples R China; Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea | ; Choo, Kwang-Ho/A-3456-2016; zhang, xiaolei/D-7698-2012 | 37054813800; 57213039681; 56275800900; 55845961700; 57204327334; 57224125922; 7102083272 | chookh@knu.ac.kr; | SCIENCE OF THE TOTAL ENVIRONMENT | SCI TOTAL ENVIRON | 0048-9697 | 1879-1026 | 819 | SCIE | ENVIRONMENTAL SCIENCES | 2022 | 9.8 | 9.3 | 0.39 | 2025-06-25 | 7 | 7 | Functional gene; Microbial community; Photolysis; Quorum quenching; Signal molecule | BIOFOULING CONTROL; BACTERIA; MBR; EVOLUTION; OXIDATION; PARADIGM; EXPOSURE; STRATEGY; FIELD | Functional gene; Microbial community; Photolysis; Quorum quenching; Signal molecule | Biofouling; Bioreactors; Gene Expression; Membranes, Artificial; Microbiota; Photolysis; Quorum Sensing; Antibiotics; Biofouling; Bioreactors; Enzymes; Gene expression; Irradiation; Membrane fouling; Membranes; Molecules; Photolysis; Quenching; Surface treatment; furan; oxygenase; unspecific monooxygenase; Alpha and beta diversities; Autoinducer-2; Functional genes; Genes expression; Membrane biofouling; Microbial communities; Microbial community structures; Quenching effect; Quorum quenching; Signal molecules; bioreactor; experimental study; gene expression; membrane; metabolism; microbial community; photolysis; ultraviolet radiation; Article; biofilm; biofouling; community structure; controlled study; ecology; environmental impact; gene expression; gene function; genetic variation; high throughput sequencing; microbial community; microbial diversity; nonhuman; operation duration; photolysis; population abundance; protein degradation; quorum quenching; radiation exposure; Sphingomonadaceae; ultraviolet radiation; wastewater; Xanthomonadaceae; artificial membrane; biofouling; bioreactor; gene expression; microflora; photolysis; quorum sensing; Microorganisms | English | 2022 | 2022-05-01 | 10.1016/j.scitotenv.2021.152017 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Review | Removal of nanoplastics in water treatment processes: A review | Nanoplastics are drawing a significant attention as a result of their propensity to spread across the environment and pose a threat to all organisms. The presence of nanoplastics in water is given attention nowadays as the transit of nanoplastics occurs through the aquatic ecosphere besides terrestrial mobility. The principal removal procedures for macro-and micro-plastic particles are effective, but nanoparticles escape from the treatment, increasing in the water and significantly influencing the society. This critical review is aimed to bestow the removal technologies of nanoplastics from aquatic ecosystems, with a focus on the treatment of freshwater, drinking water, and wastewater, as well as the importance of transit and its impact on health concerns. Still, there exists a gap in providing a collective knowledge on the methods available for nanoplastics removal. Hence, this review offered various nanoplastic removal technologies (microorganism-based degradation, membrane separation with a reactor, and photocatalysis) that could be the practical/effective measures along with the traditional procedures (filtration, coagulation, centrifugation, flocculation, and gravity settling). From the analyses of different treatment systems, the effectiveness of nanoplastics removal depends on various factors, source, size, and type of nanoplastics apart from the treatment method adopted. Combined removal methods, filtration with coagulation offer great scope for the removal of nanoplastics from drinking water with >99 % efficiency. The collected data could serve as base-line information for future research and develop-ment in water nanoplastics cleanup. | Devi, M. Keerthana; Karmegam, N.; Manikandan, S.; Subbaiya, R.; Song, Hocheol; Kwon, Eilhann E.; Sarkar, Binoy; Bolan, Nanthi; Kim, Woong; Rinklebe, Joerg; Govarthanan, M. | Saveetha Inst Med & Tech Sci SIMATS, Saveetha Sch Engn, Dept Biotechnol, Chennai 602105, Tamil Nadu, India; Govt Arts Coll Autonomous, Dept Bot, Salem 636007, Tamil Nadu, India; Copperbelt Univ, Sch Math & Nat Sci, Dept Biol Sci, Jambo Dr,POB 21692, Kitwe, Zambia; Univ Western Australia, UWA Inst Agr, Sch Agr & Environm, Perth, WA 6001, Australia; Kyungpook Natl Univ, Dept Environm Engn, Daegu 41566, South Korea; Univ Wuppertal, Inst Fdn Engn Water & Waste Management, Sch Architecture & Civil Engn, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wuppertal, Germany; Shoolini Univ, Int Res Ctr Nanotechnol Himalayan Sustainabil IRCN, Solan 173212, Himachal Prades, India; Hanyang Univ, Dept Earth Resources & Environm Engn, Seoul 04763, South Korea; Sejong Univ, Dept Environm & Energy, 98 Gunja Dong, Seoul, South Korea; Univ South Australia, Future Ind Inst, Mawson Lakes, SA 5095, Australia; Saveetha Inst Med & Tech Sci, Saveetha Dent Coll & Hospital, Dept Biomat, Chennai 600077, India | Subbaiya, R/AAR-2948-2021; Sarkar, Binoy/D-1573-2011; Song, Hocheol/ABD-7214-2021; S, Manikandan/GZM-7135-2022; Natchimuthu, Karmegam/J-4745-2019; Muthusamy, Govarthanan/C-1491-2014; Karmegam, Natchimuthu/J-4745-2019; Sarkar, Binoy/A-5187-2019; Kwon, Eilhann/AGY-3339-2022; Mohan, Keerthanadevi/HPH-1666-2023; Bolan, Nanthi/E-8535-2011; Rinklebe, Joerg/Y-2398-2019; Govarthanan, Muthusamy/C-1491-2014 | 57194520916; 6506043230; 55213168500; 55263515700; 56562122800; 9240622100; 56962773100; 57204849193; 55581636400; 55893080100; 54881927600 | kanishkarmegam@gmail.com;rinklebe@uni-wuppertal.de;gova.muthu@gmail.com; | SCIENCE OF THE TOTAL ENVIRONMENT | SCI TOTAL ENVIRON | 0048-9697 | 1879-1026 | 845 | SCIE | ENVIRONMENTAL SCIENCES | 2022 | 9.8 | 9.3 | 2.25 | 2025-06-25 | 103 | 111 | Nanoplastics; Ultra filtration; Flocculation; Microbial remediation; Membrane bioreactors; Metagenomics | MICROPLASTICS; DEGRADATION; QUANTIFICATION; ENVIRONMENT; FILTRATION; SEPARATION; PARTICLES; IMPACT | Flocculation; Membrane bioreactors; Metagenomics; Microbial remediation; Nanoplastics; Ultrafiltration | Drinking Water; Ecosystem; Microplastics; Plastics; Water Pollutants, Chemical; Water Purification; Aquatic ecosystems; Biodegradation; Biofilms; Bioreactors; Chemical water treatment; Coagulation; Flocculation; Particle size analysis; Potable water; Wastewater treatment; Water filtration; drinking water; nanomaterial; nanoplastic; polyethylene terephthalate; polystyrene; polyvinylchloride; drinking water; plastic; Critical review; Fresh Water; Membrane bioreactor; Metagenomics; Micro plastics; Microbial remediation; Nanoplastics; Plastic particle; Water and wastewater; Water treatment process; bioreactor; flocculation; genomics; microbial activity; polymer; remediation; ultrafiltration; water treatment; adsorption; aquatic environment; biotechnology; centrifugation; ecosystem restoration; environmental impact; field flow fractionation; filtration; flocculation; freshwater environment; gravity; metagenomics; microorganism; photocatalysis; Review; separation technique; ultrafiltration; waste component removal; waste water management; water pollutant; water treatment; ecosystem; water management; water pollutant; Microfiltration | English | 2022 | 2022-11-01 | 10.1016/j.scitotenv.2022.157168 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Secure Transmission for Hierarchical Information Accessibility in Downlink MU-MIMO | Physical layer security is a useful tool to prevent illegal wiretapping to confidential information. In this paper, we consider a generalized model of conventional physical layer security, referred as hierarchical information accessibility (HIA). A main feature of the HIA model is that a network has a hierarchy in information access, wherein decoding feasibility is determined by each user's priority. Under this HIA model, we formulate a sum secrecy rate maximization problem with regard to precoding vectors. This problem is challenging since multiple non-smooth functions are involved into the secrecy rate to fulfill the HIA conditions and also the problem is non-convex. To address the challenges, we approximate the minimum function by using the LogSumExp technique, thereafter obtain the first-order optimality condition. One key observation is that the derived condition is cast as a functional eigenvalue problem, where the eigenvalue is equivalent to the approximated objective function of the formulated problem. Accordingly, we show that finding a principal eigenvector is equivalent to finding a local optimal solution. To this end, we develop a novel method called generalized power iteration for HIA (GPI-HIA). Simulations demonstrate that the GPI-HIA significantly outperforms other baseline methods in terms of the secrecy rate. | Lee, Kanguk; Choi, Jinseok; Kim, Dong Ku; Park, Jeonghun | Kyungpook Natl Univ, Coll IT Engn, Sch Elect Engn, Daegu 41566, South Korea; SK Telecom SKT, Seoul 04539, South Korea; Ulsan Natl Inst Sci & Technol, Dept Elect Engn, Ulsan 44919, South Korea; Yonsei Univ, Dept Elect & Elect Engn, Seoul 03722, South Korea | ; Choi, Jinseok/AAL-6383-2020 | 57274956700; 57190581671; 15019369300; 57853652900 | kanguk.lee@knu.ac.kr;jinseokchoi@unist.ac.kr;dkkim@yonsei.ac.kr;jeonghun.park@knu.ac.kr; | IEEE TRANSACTIONS ON COMMUNICATIONS | IEEE T COMMUN | 0090-6778 | 1558-0857 | 70 | 9 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2022 | 8.3 | 9.3 | 0.24 | 2025-06-25 | 3 | 3 | Security; Precoding; NOMA; Downlink; Optimization; Physical layer security; Quality of service; Physical layer security; hierarchical security; MU-MIMO; multigroup multicast; beamforming optimization | PHYSICAL LAYER SECURITY; BEAMFORMING DESIGN; RATE OPTIMIZATION; POWER ALLOCATION; UNICAST; ROBUST | beamforming optimization; hierarchical security; MU-MIMO; multigroup multicast; Physical layer security | Eigenvalues and eigenfunctions; Iterative methods; Network layers; Network security; Accessibility model; Downlink; Hierarchical information; Information accessibility; NOMA; Optimisations; Physical layer security; Precoding; Quality-of-service; Security; Quality of service | English | 2022 | 2022-09 | 10.1109/tcomm.2022.3189386 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Sparse and Low-Rank Optimization for Pliable Index Coding via Alternating Projection | Pliable index coding (PICOD) has recently been regarded as a promising solution that exploits the coding advantage to improve communication efficiency of content-type systems (e.g., recommendation system), where clients are pliable and are interested in receiving any new message that they do not have. PICOD aims to find an effective coding strategy that satisfies the demands of all clients with the minimum number of transmissions. However, most of the previous works mainly provided theoretical understanding on PICOD in special instances based on greedy algorithms. In contrast, in this paper, we present a flexible sparse and low-rank matrix modeling approach to minimize the number of transmissions for the general PICOD problems. This is achieved by establishing generalized pliable alignment conditions to guarantee the requirements of all clients. As the resulting non-convex problem is highly intractable, we further develop an alternating pursuit framework to detect the rank of the matrix to be recovered by using the rank-increasing strategy. To address the feasibility-detection issues in the existing methods, we propose an alternating projection algorithm, which admits closed-form expressions and avoids excessive sparsity inducing. Moreover, we establish the global convergence of the alternating projection algorithm with random initial points. Simulation results demonstrate that the proposed alternating pursuit algorithm significantly reduces the number of transmissions compared to the state-of-the-art methods. | Fu, Min; Jiang, Tao; Choi, Hayoung; Zhou, Yong; Shi, Yuanming | ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China; Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China; Univ Chinese Acad Sci, Beijing 100049, Peoples R China; Univ Toronto, Edward S Rogers Sr Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada; Kyungpook Natl Univ, Dept Math, Daegu 41566, South Korea; Yoke Intelligence, Shanghai 201210, Peoples R China | Shi, Yuanming/LSK-2577-2024; Choi, Hayoung/U-7046-2019; FU, MIN/KLD-7410-2024; Jiang, Tao/ACK-3502-2022 | 57211886076; 57208173904; 56942685000; 35732808900; 55695283900 | fumin@shanghaitech.edu.cn;taoca.jiang@mail.utoronto.ca;hayoung.choi@knu.ac.kr;zhouyong@shanghaitech.edu.cn;shiym@shanghaitech.edu.cn; | IEEE TRANSACTIONS ON COMMUNICATIONS | IEEE T COMMUN | 0090-6778 | 1558-0857 | 70 | 6 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2022 | 8.3 | 9.3 | 0.08 | 2025-06-25 | 1 | 1 | Encoding; Indexes; Sparse matrices; Servers; Optimization; Minimization; Decoding; Pliable index coding; sparse and low-rank optimization; alternating projection method | ALGORITHMS; MATRIX | Alternating projection method; Pliable index coding; Sparse and low-rank optimization | Codes (symbols); Optimization; Signal encoding; Alternating projection method; Encodings; Index; Index coding; Minimisation; Optimisations; Pliable index coding; Sparse and low ranks; Sparse and low-rank optimization; Sparse matrices; Matrix algebra | English | 2022 | 2022-06 | 10.1109/tcomm.2022.3168280 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Structural and functional alterations of subjects with cement dust exposure: A longitudinal quantitative computed tomography-based study | Cement dust exposure (CDE) can be a risk factor for pulmonary disease, causing changes in segmental airways and parenchymal lungs. This study investigates longitudinal alterations in quantitative computed tomography (CT)-based metrics due to CDE. We obtained CT-based airway structural and lung functional metrics from CDE subjects with baseline CT and follow-up CT scans performed three years later. From the CT, we extracted wall thickness (WT) and bifurcation angle (theta) at total lung capacity (TLC) and functional residual capacity (FRC), respectively. We also computed air volume (V-air), tissue volume (V-tissue), global lung shape, percentage of emphysema (E-mph%), and more. Clinical measures were used to associate with CT-based metrics. Three years after their baseline, the pulmonary function tests of CDE subjects were similar or improved, but there were significant alterations in the CT-based structural and functional metrics. The follow-up CT scans showed changes in theta at most of the central airways; increased WT at the subgroup bronchi; smaller V(air )at TLC at all except the right upper and lower lobes; smaller V-tissue at all lobes in TLC and FRC except for the upper lobes in FRC; smaller global lung shape; and greater E-mph% at the right upper and lower lobes. CT-based structural and functional variables are more sensitive to the early identification of CDE subjects, while most clinical lung function changes were not noticeable. We speculate that the significant long-term changes in CT are uniquely observed in CDE subjects, different from smoking-induced structural changes. | Kim, Taewoo; Lim, Myoung-nam; Kim, Woo Jin; Ho, Thao Thi; Lee, Chang Hyun; Chae, Kum Ju; Bak, So Hyeon; Jin, Gong Yong; Park, Eun-Kee; Choi, Sanghun | Kyungpook Natl Univ, Sch Mech Engn, Daegu, South Korea; Kangwon Natl Univ, Kangwon Natl Univ Hosp, Biomed Res Inst, Sch Med, Chunchon, South Korea; Kangwon Natl Univ Hosp, Kangwon Natl Univ, Environm Hlth Ctr, Sch Med, Chunchon, South Korea; Seoul Natl Univ, Coll Med, Dept Radiol, Seoul, South Korea; Univ Iowa, Coll Med, Dept Radiol, Iowa City, IA USA; Jeonbuk Natl Univ, Jeonbuk Natl Univ Hosp, Dept Radiol,Res Inst Clin Med, Biomed Res Inst, Jeonju, South Korea; Kangwon Natl Univ, Kangwon Natl Univ Hosp, Sch Med, Dept Radiol, Chunchon, South Korea; Kosin Univ, Coll Med, Dept Med Humanities & Social Med, Pusan, South Korea | ; Choi, Sanghun/AGS-7430-2022; Kim, Jong/J-2749-2012 | 57192910015; 56183745600; 56560422500; 57221374670; 57196253438; 57195310676; 57192422019; 55663719500; 57216814178; 55847101000 | s-choi@knu.ac.kr; | SCIENCE OF THE TOTAL ENVIRONMENT | SCI TOTAL ENVIRON | 0048-9697 | 1879-1026 | 837 | SCIE | ENVIRONMENTAL SCIENCES | 2022 | 9.8 | 9.3 | 0.44 | 2025-06-25 | 7 | 8 | Cement dust exposure; Wall thickening; Reduced global lung shape; Reduced tissue volume | AIRWAY DIMENSIONS; LUNG-FUNCTION; RISK-FACTORS; COPD; SMOKERS; SUBPOPULATIONS; OBSTRUCTION; DIAGNOSIS | Cement dust exposure; Reduced global lung shape; Reduced tissue volume; Wall thickening | Dust; Humans; Lung; Pulmonary Disease, Chronic Obstructive; Tomography, X-Ray Computed; Total Lung Capacity; Cements; Computerized tomography; Dust; Pulmonary diseases; Respiratory system; Tissue; cement; Cement dust; Cement dust exposure; Computed tomography scan; Follow up; Functional residual capacities; Quantitative computed tomographies; Reduced global lung shape; Reduced tissue volume; Total lung capacities; Wall thickening; cement (construction material); dust; health risk; public health; quantitative analysis; risk factor; tomography; aged; air volume; airway; Article; bifurcation angle; bronchus; cement dust exposure; cohort analysis; computer assisted tomography; dust exposure; female; follow up; functional residual capacity; global lung shape; human; longitudinal study; lung emphysema; lung function; lung function test; lung lobe; lung structure; lung wall thickness; male; pleura thickening; quantitative analysis; quantitative study; respiratory tract parameters; tissue volume; total lung capacity; chronic obstructive lung disease; diagnostic imaging; dust; lung; procedures; x-ray computed tomography; Biological organs | English | 2022 | 2022-09-01 | 10.1016/j.scitotenv.2022.155812 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Tailoring the Time-Averaged Structure for Polarization-Sensitive Chiral Perovskites | Chiral perovskites have emerged as promising candidates for polarization-sensing materials. Despite their excellent chiroptical properties, the nature of their multiple-quantum-well structures is a critical hurdle for polarization-based and spintronic applications. Furthermore, as the origin of chiroptical activity in chiral perovskites is still illusive, the strategy for simultaneously enhancing the chiroptical activity and charge transport has not yet been reported. Here, we demonstrated that incorporating a Lewis base into the lattice can effectively tune the chiroptical response and electrical properties of chiral perovskites. Through solid-state nuclear magnetic resonance spectroscopic measurements and theoretical calculations, it was demonstrated that the material property manipulation resulted from the change in the time-averaged structure induced by the Lewis base. Finally, as a preliminary proof of concept, a vertical-type circularly polarized light photodetector based on chiral perovskites was developed, exhibiting an outstanding performance with a distinguishability of 0.27 and a responsivity of 0.43 A W-1. | Lee, Chan Uk; Ma, Sunihl; Ahn, Jihoon; Kyhm, Jihoon; Tan, Jeiwan; Lee, Hyungsoo; Jang, Gyumin; Park, Young Sun; Yun, Juwon; Lee, Junwoo; Son, Jaehyun; Park, Ji-Sang; Moon, Jooho | Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea; Korea Inst Sci & Technol, Technol Support Ctr, Seoul 02792, South Korea; Kyungpook Natl Univ, Dept Phys, Seoul 02792, South Korea; Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol St, Dept Nano Engn, Suwon 16419, South Korea | Ma, Sunihl/HNB-6506-2023; Moon, Jooho/A-5850-2010 | 57368342700; 57191751090; 55948034700; 36965693000; 57193203105; 57193156295; 57203249058; 57305153200; 57212480462; 57190299338; 57759465200; 36671796300; 7403231103 | jsparkphys@knu.ac.kr;jmoon@yonsei.ac.kr; | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | J AM CHEM SOC | 0002-7863 | 1520-5126 | 144 | 35 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2022 | 15 | 9.3 | 1.57 | 2025-06-25 | 29 | 27 | SOLID-STATE NMR; LEWIS-BASE; CIRCULAR-DICHROISM; HYBRID PEROVSKITE; THIN-FILMS; EFFICIENT; LIGHT | Polarization; Semiconductor quantum wells; benzene; benzyl derivative; Lewis base; perovskite; urea; Chiroptical properties; Lewis base; Multiple quantum-well structures; Multiple-quantum-well structures; Polarization sensitive; Sensing material; Solid-state nuclear magnetic resonance; Spectroscopic measurements; Spintronics application; Time-averaged; Article; chirality; circular dichroism; conformational transition; crystal structure; light intensity; nuclear magnetic resonance; polarization; proof of concept; Perovskite | English | 2022 | 2022-09-07 | 10.1021/jacs.2c05849 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | Article | Time-Evolving Chirality Loss in Molecular Photodissociation Monitored by X-ray Circular Dichroism Spectroscopy | The ultrafast photoinduced chirality loss of 2-iodobutane is studied theoretically by time- and frequency-resolved X-ray circular dichroism (TRXCD) spectroscopy. Following an optical excitation, the iodine atom dissociates from the chiral center, which we capture by quantum non-adiabatic molecular dynamics simulations. At variable time delays after the pump, the resonant X-ray pulse selectively probes the iodine and carbon atom involved in the chiral dissociation through a selected core-to-valence transition. The TRXCD signal at the iodine L1edge accurately captures the timing of C-I photodissociation and thereby chirality loss, c.a 70 fs. The strong electric dipole-electric quadrupole (ED-EQ) response makes this signal particularly sensitive to vibronic coherence at the high X-ray regime. At the carbon K-edges, the signals monitor the molecular chirality of the 2-butyl radical photoproduct and the spin state of the iodine atom. The ED-EQ response is masked under the strong electric dipole-magnetic dipole response, making this signal intuitive for the electronic population. The evolution of the core electronic states and its chiral sensitivity is discussed. Overall, the element-specific TRXCD signal provides a detailed picture of molecular dynamics and offers a unique sensitive window into the time-dependent chirality of molecules. © 2022 American Chemical Society. All rights reserved. | Nam, Yeonsig; Cho, Daeheum; Gu, Bing; Rouxel, Jérémy R.; Keefer, Daniel; Govind, Niranjan; Mukamel, Shaul | Department of Chemistry, University of California, Irvine, Irvine, 92697, CA, United States; Departments of Chemistry, Kyungpook National University, Daegu, 41566, South Korea; Department of Chemistry, University of California, Irvine, Irvine, 92697, CA, United States; UJM-Saint-Étienne, CNRS, Graduate School Optics Institute, Laboratoire Hubert Curien UMR 5516, University Lyon, Saint-Étienne, 42023, France; Department of Chemistry, University of California, Irvine, Irvine, 92697, CA, United States; Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, 99354, WA, United States; Department of Chemistry, University of California, Irvine, Irvine, 92697, CA, United States | 57014376600; 55263218400; 55587749300; 55358373900; 56966355300; 7003951565; 35473361700 | yeonsign@uci.edu;smukamel@uci.edu;daeheumc@knu.ac.kr; | Journal of the American Chemical Society | J AM CHEM SOC | 0002-7863 | 1520-5126 | 144 | 44 | SCIE | CHEMISTRY, MULTIDISCIPLINARY | 2022 | 15 | 9.3 | 0.29 | 2025-06-25 | 5 | Carbon; Circular Dichroism; Iodine; X-Rays; Atoms; Chirality; Circular dichroism spectroscopy; Iodine; Molecular dynamics; Optical pumping; Photodissociation; Spin dynamics; Stereochemistry; carbon; iodine; carbon; iodine; Chiral centers; Circular dichroism signals; Dynamics simulation; Electric dipole; Electric quadrupoles; Iodine atoms; Nonadiabatic molecular dynamics; Photo-induced chirality; Time and frequencies; Ultra-fast; Article; atom; chirality; circular dichroism; controlled study; dipole; dissociation; electron; energy transfer; light; magnetism; molecular dynamics; photodissociation; quantum chemistry; time; time resolved X ray circular dichroism spectroscopy; X ray spectroscopy; circular dichroism; X ray; Dichroism | English | Final | 2022 | 10.1021/jacs.2c08458 | 바로가기 | 바로가기 | 바로가기 | ||||||||
| ○ | ○ | Article | Uptake of endosulfan isomers from soils by leafy vegetable lettuce: A comparative study between model-predicted and field-experimented results | The organochlorine insecticide endosulfan has been classified as a persistent organic pollutant due to its long persistence and high toxicity, and banned in most countries. However, endosulfan residues are still detected in various environmental sites (even in non-agricultural areas) and have a likelihood to return to agricultural soils through various routes. In this study, time-dependent uptake of alpha-and f3-isomers of endosulfan by lettuce from soils was estimated using theoretical models which include parameters describing sorption/dissipation in soil and plants, plant transpiration, root-soil transfer, and plant growth. A chemical-specific residue (CSR) model developed in a previous study was used as a sub-model to estimate the portion of endosulfan residues in soils ready to be absorbed by lettuce, and the accuracy of the CSR model was verified by properly estimating concentrations of endosulfan isomers in soils with different organic matters; a low mean deviation (18.8 %) was observed between the modeled and measured values. Modeled results of f3-endosulfan using a soil-lettuce uptake model satisfactorily matched the experimentally measured results, with a moderate correlation (R-2 > 0.79) and a low residual error (0.42) against a mean factor of -1.04. However, the uptake model showed the low potential to predict the soil-lettuce uptake of alpha-endosulfan (176.3 % mean deviation), probably due to not considering an intrinsic trait of beta-isomer converting to alpha-isomer. Although the improvement with more sophisticated parameters is needed, the plant uptake model developed in this study could be utilized to predict soil-lettuce uptake of at least beta-endosulfan and as a model template that may apply for other types of plants and contaminants. | Hwang, Jeong-In; Kim, Jang-Eok | Univ Arkansas, Dept Crop Soil Environm Sci, Fayetteville, AR 72701 USA; Kyungpook Natl Univ, Coll Agr & Life Sci, Sch Appl Biosci, Daegu 41566, South Korea | 55620449700; 7601387161 | jekim@knu.ac.kr; | SCIENCE OF THE TOTAL ENVIRONMENT | SCI TOTAL ENVIRON | 0048-9697 | 1879-1026 | 844 | SCIE | ENVIRONMENTAL SCIENCES | 2022 | 9.8 | 9.3 | 0.11 | 2025-06-25 | 3 | 3 | Chemical-specific residue model; Endosulfan; Lettuce; Model prediction; Persistent organic pollutant; Soil-plant uptake | PERSISTENT ORGANIC POLLUTANTS; PLANT UPTAKE; PESTICIDE; CHLORPYRIFOS; BIODEGRADATION; TRANSLOCATION; DEGRADATION; RESIDUES; DYNAMICS; ALPHA | Chemical-specific residue model; Endosulfan; Lettuce; Model prediction; Persistent organic pollutant; Soil–plant uptake | Endosulfan; Insecticides; Lettuce; Soil; Soil Pollutants; Vegetables; Agriculture; Forecasting; Insecticides; Isomers; Organic pollutants; Soils; endosulfan; organic matter; endosulfan; insecticide; Chemical specific; Chemical-specific residue model; Comparatives studies; Endosulfans; Leafy vegetables; Mean deviation; Model prediction; Persistent organic pollutant; Plant uptake; Soil–plant uptake; agricultural soil; comparative study; concentration (composition); dissipation; endosulfan; insecticide; leafy vegetable; organochlorine; persistent organic pollutant; soil-vegetation interaction; toxicity; accuracy; Article; comparative study; controlled study; evapotranspiration; field experiment; isomer; leafy vegetable; nonhuman; persistent organic pollutant; plant growth; plant root; chemistry; lettuce; soil; soil pollutant; vegetable; Lettuce | English | 2022 | 2022-10-20 | 10.1016/j.scitotenv.2022.157056 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | A New Iron Emission Template for Active Galactic Nuclei. I. Optical Template for the Hβ Region* | We present a new empirical template for iron emission in active galactic nuclei (AGNs) covering the 4000-5600 angstrom range. The new template is based on a spectrum of the narrow-line Seyfert 1 galaxy Mrk 493 obtained with the Hubble Space Telescope. In comparison with the canonical iron template object I Zw 1, Mrk 493 has narrower broad-line widths, lower reddening, and a less extreme Eddington ratio, making it a superior choice for template construction. We carried out a multicomponent spectral decomposition to produce a template incorporating all the permitted and forbidden lines of Fe ii identified in the Mrk 493 spectrum over this wavelength range, as well as lines from Ti ii, Ni ii, and Cr ii. We tested the template by fitting it to AGN spectra spanning a broad range of iron emission properties, and we present a detailed comparison with fits using other widely used monolithic and multicomponent iron emission templates. The new template generally provides the best fit (lowest chi (2)) compared to other widely used monolithic empirical templates. In addition, the new template yields more accurate spectral measurements including a significantly better match of the derived Balmer line profiles (H beta, H gamma, H delta), in contrast with results obtained using the other templates. Our comparison tests show that the choice of iron template can introduce a systematic bias in measurements of the H beta line width, which consequently impacts single-epoch black hole mass estimates by similar to 0.1 dex on average and possibly up to similar to 0.3-0.5 dex individually. | Park, Daeseong; Barth, Aaron J.; Ho, Luis C.; Laor, Ari | Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 41566, South Korea; Korea Astron & Space Sci Inst, Daejeon 34055, South Korea; Univ Calif Irvine, Dept Phys & Astron, 4129 Frederick Reines Hall, Irvine, CA 92697 USA; Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China; Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China; Technion, Phys Dept, IL-32000 Haifa, Israel | 15127668500; 36088948300; 57225302746; 9432452600 | daeseong.park@gmail.com;barth@uci.edu;lho.pku@gmail.com;laor@physics.technion.ac.il; | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | ASTROPHYS J SUPPL S | 0067-0049 | 1538-4365 | 258 | 2 | SCIE | ASTRONOMY & ASTROPHYSICS | 2022 | 8.7 | 9.4 | 1.84 | 2025-06-25 | 23 | 22 | BLACK-HOLE MASSES; FE-II EMISSION; BROAD-LINE REGION; MONITORING PROJECT; MODERATE-LUMINOSITY; COSMIC EVOLUTION; REDSHIFT QUASARS; EIGENVECTOR 1; SAMPLE; ULTRAVIOLET | English | 2022 | 2022-02-01 | 10.3847/1538-4365/ac3f3e | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||
| ○ | ○ | Article | ALMA/ACA CO Survey of the IC 1459 and NGC 4636 Groups: Environmental Effects on the Molecular Gas of Group Galaxies | We present new results of a (CO)-C-12(J = 1-0) imaging survey using the Atacama Compact Array (ACA) for 31 H i detected galaxies in the IC 1459 and NGC 4636 groups. This is the first CO imaging survey for loose galaxy groups. We obtained well-resolved CO data (similar to 0.7-1.5 kpc) for a total of 16 galaxies in two environments. By comparing our ACA CO data with the H i and UV data, we probe the impacts of the group environment on the cold gas components (CO and H i gas) and star formation activity. We find that CO and/or H i morphologies are disturbed in our group members, some of which show highly asymmetric CO distributions (e.g., IC 5264, NGC 7421, and NGC 7418). In comparison with isolated galaxies in the xCOLD GASS sample, our group galaxies tend to have low star formation rates and low H-2 gas fractions. Our findings suggest that the group environment can change the distribution of cold gas components, including the molecular gas and star formation properties of galaxies. This is supporting evidence that preprocessing in the group-like environment can play an important role in galaxy evolution. | Lee, Bumhyun; Wang, Jing; Chung, Aeree; Ho, Luis C.; Wang, Ran; Michiyama, Tomonari; Molina, Juan; Kim, Yongjung; Shao, Li; Kilborn, Virginia; Wang, Shun; Lin, Xuchen; Kim, Dawoon E.; Catinella, Barbara; Cortese, Luca; Deg, Nathan; Denes, Helga; Elagali, Ahmed; For, Bi-Qing; Kleiner, Dane; Koribalski, Barbel S.; Lee-Waddell, Karen; Rhee, Jonghwan; Spekkens, Kristine; Westmeier, Tobias; Wong, O. Ivy; Bigiel, Frank; Bosma, Albert; Holwerda, Benne W.; van der Hulst, Jan M.; Roychowdhury, Sambit; Verdes-Montenegro, Lourdes; Zwaan, Martin A. | Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China; Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea; Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 03722, South Korea; Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China; Osaka Univ, Dept Earth & Space Sci, 1-1 Machikaneyama, Toyonaka, Osaka 5600043, Japan; Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan; Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Coll Nat Sci, Daegu 41566, South Korea; Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing, Peoples R China; Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia; ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Clayton, Vic, Australia; Ist Astrofis & Planetol Spaziali, INAF, Via Fosso del Cavaliere 100, I-00133 Rome, Italy; Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy; Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy; Univ Western Australia, Int Ctr Radio Astron Res ICRAR, 35 Stirling Highway, Crawley, WA 6009, Australia; Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada; ASTRON Netherlands Inst Radio Astron, NL-7991 PD Dwingeloo, Netherlands; Perth Childrens Hosp, Telethon Kids Inst, Perth, WA, Australia; Osservatorio Astron Cagliari, INAF, Via Sci 5, I-09047 Selargius, CA, Italy; Australia Telescope Natl Facil, CSIRO Space & Astron, POB 76, Parkes, NSW 1710, Australia; Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia; Australia Telescope Natl Facil, CSIRO Space & Astron, POB 1130, Bentley, WA 6102, Australia; Royal Mil Coll Canada, POB 17000, Kingston, ON K7K 7B4, Canada; Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany; Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France; Univ Louisville, Dept Phys & Astron, 102 Nat Sci Bldg, Louisville, KY 40292 USA; Univ Groningen, Kapteyn Astron Inst, Groningen, Netherlands; CSIC, Inst Astrofis Andalucia, Madrid, Spain; European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany | ; Wong, O. Ivy/JXL-3740-2024; Wong, Ivy/AAX-5308-2020; Dénes, Helga/AGP-9452-2022; Lee-Waddell, Karen/AER-9486-2022; van der Hulst, J.M./D-1857-2012; Bosma, Albert/KCY-7063-2024; Shao, Lijing/GRO-6046-2022; , Yong Jung Kim/JRW-0681-2023; Verdes-Montenegro, Lourdes/K-7513-2014; Catinella, Barbara/HCH-2941-2022; Kim, Dong Eun/JLM-6408-2023; Cortese, Luca/AAV-4926-2021; Koribalski, Baerbel/B-9987-2008; Kleiner, Dane/AAD-5002-2022 | 57195605164; 55917994100; 8100674200; 57225302746; 57210943177; 57191363681; 57205984755; 59622148200; 59437740400; 6701757842; 57223912916; 57387394700; 57668086600; 8888980600; 57203054430; 55557535200; 55798569000; 57191280872; 8924174700; 56073804300; 7004543433; 55498259800; 36017484900; 8569260800; 8969308400; 7004813978; 16444042900; 56213655300; 9942710000; 7003809007; 30567624000; 55943349100; 7005304369 | bhlee301@gmail.com;jwang_astro@pku.edu.cn; | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | ASTROPHYS J SUPPL S | 0067-0049 | 1538-4365 | 262 | 1 | SCIE | ASTRONOMY & ASTROPHYSICS | 2022 | 8.7 | 9.4 | 1.26 | 2025-06-25 | 16 | 16 | STAR-FORMATION RATES; GROUP EVOLUTION MULTIWAVELENGTH; WALLABY EARLY SCIENCE; JCMT NEARBY GALAXIES; SOUTHERN GEMS GROUPS; MASS ASSEMBLY GAMA; H-I; RAM PRESSURE; SUPERWIND GALAXY; CENTRAL REGION | English | 2022 | 2022-09-01 | 10.3847/1538-4365/ac7eba | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Online action proposal generation using spatio-temporal attention network | Temporal action proposal generation aims to generate temporal boundaries containing action instances. In real-time applications such as surveillance cameras, autonomous driving, and traffic monitoring, the online localization and recognition of human activities occurring in short temporal intervals are important areas of research. Existing approaches of temporal action proposal generation consider only the offline and frame-level feature aggregation along the temporal dimension. Those offline methods also generate many redundant irrelevant proposal regions in the frames as temporal boundaries. This leads to higher computational cost along with slow processing speed which is not suitable for online tasks. In this study, we propose a novel spatio-temporal attention network for online action proposal generation as opposed to existing offline proposal generation methods. Our novel proposed approach incorporates the inter-dependency between the spatial and temporal context information of each incoming video clip to generate more relevant online temporal action proposals. First, we propose a windowed spatial attention module to capture the inter-spatial relationship between the features of incoming frames. The windowed spatial network produces more robust clip-level feature representation and efficiently deals with noisy features such as occlusion or background scenes. Second, we introduce a temporal attention module to capture relevant temporal dynamic information mutually to the localized spatial information to model the long inter-frame temporal relationship since most online real life videos are untrimmed in nature. By applying these two attention modules sequentially, the novel proposed spatio-temporal network model is able to generate precise action boundaries at a particular instant of time. In addition, the model generates fewer discriminative temporal action proposals while maintaining a low computational cost and high processing speed suitable for online settings. | Keisham, Kanchan; Jalali, Amin; Lee, Minho | Kyungpook Natl Univ, Grad Sch Artificial Intelligence, Daegu 41566, South Korea; Kyungpook Natl Univ, AI Inst Technol, KNU LG Elect Convergence Res Ctr, Daegu 41566, South Korea | Lee, Min-Ho/ABE-5735-2021; Jalali, Amin/AAH-6921-2019 | 57140837500; 57022190400; 57191730119 | kanchankeisham@gmail.com;max.jalali@gmail.com;mholee@gmail.com; | NEURAL NETWORKS | NEURAL NETWORKS | 0893-6080 | 1879-2782 | 153 | SCIE | COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE;NEUROSCIENCES | 2022 | 7.8 | 9.4 | 0.73 | 2025-06-25 | 10 | 10 | Temporal action proposal; Action detection; Spatial attention; Temporal attention | ACTION RECOGNITION | Action detection; Spatial attention; Temporal action proposal; Temporal attention | Humans; Recognition, Psychology; Action detection; Computational costs; Offline; Processing speed; Real-time application; Spatial attention; Spatio-temporal; Surveillance cameras; Temporal action proposal; Temporal attention; Article; artificial neural network; attention network; cost; feature extraction; online system; processing speed; spatial attention; spatiotemporal analysis; temporal attention; time; videorecording; visual attention; human; Security systems | English | 2022 | 2022-09 | 10.1016/j.neunet.2022.06.032 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Article | A Genomics-Based Semirational Approach for Expanding the Postbiotic Potential of Collagen Peptides Using Lactobacillaceae | Food-derived bioactive peptides (BPs) have received considerable attention as postbiotics for human gut health. Here we used a genomics-based semirational approach to expand the postbiotic potential of collagen peptides (CPs) produced from probiotic fermentation. In silico digestion revealed distinct BPs embedded in fish collagen in a protease-dependent manner. Anaerobic digestion of collagen by representative Lactobacillaceae species revealed differential substrate utilization and collagen degradation patterns. Nanoliquid chromatography-mass spectrometry analysis of CPs showed that each species exhibited different cleavage patterns and unique peptide profiles. Remarkably, the 1-10 kDa CPs produced by Lacticaseibacillus paracasei showed agonistic activities toward G protein-coupled receptor 35 (GPR35). These CPs could repair intestinal epithelium through the GPR35-mediated extracellular signal-regulated protein kinase (ERK) 1/2 signaling pathway, suggesting that probiotic-aided collagen hydrolysates can serve as postbiotics for host-microbe interactions. Therefore, this study provides an effective strategy for the rapid screening of CPs for gut health in the gastrointestinal tract. © 2022 American Chemical Society. All rights reserved. | Lee, Ji-Young; Hwang, Hye Won; Jin, Hyeon-Su; Lee, Jae-Eun; Kang, Nam Joo; Lee, Dong-Woo | Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 3722, South Korea; Department of Bioindustrial Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 3722, South Korea; Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 3722, South Korea; Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 3722, South Korea; School of Food Science and Biotechnology, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu, 41566, South Korea; Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 3722, South Korea, Department of Bioindustrial Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul, 3722, South Korea | 58161969200; 57809525800; 56997924500; 57203144423; 8315288500; 57195068659 | leehicam@yonsei.ac.kr; | Journal of Agricultural and Food Chemistry | J AGR FOOD CHEM | 0021-8561 | 1520-5118 | 70 | 27 | SCIE | AGRICULTURE, MULTIDISCIPLINARY;CHEMISTRY, APPLIED;FOOD SCIENCE & TECHNOLOGY | 2022 | 6.1 | 9.5 | 0.52 | 2025-06-25 | 5 | bioactive peptides; collagen peptides; gut; Lactobacillaceae; postbiotics | Animals; Antioxidants; Collagen; Genomics; Humans; Lactobacillaceae; Peptides; Anaerobic digestion; Collagen; Genes; Mass spectrometry; Peptides; Probiotics; antioxidant; collagen; peptide; Bioactive peptides; Collagen peptides; G protein coupled receptors; Genomics; Gut; Gut healths; Human guts; Lactobacillaceae; Postbiotic; Probiotic fermentations; animal; chemistry; genomics; human; Lactobacillaceae; metabolism; Genome | English | Final | 2022 | 10.1021/acs.jafc.2c01251 | 바로가기 | 바로가기 | 바로가기 | |||||||
| ○ | ○ | Article | Bending-deformation-induced inhomogeneous aging behavior and accelerated precipitation kinetics of extruded AZ80 alloy | In this study, the effects of bending deformation on the precipitation behavior of an extruded AZ80 alloy are investigated by subjecting a plate of the alloy to three-point bending and subsequent aging at 200 degrees C. In the upper region of the bent specimen (denoted as CZ), numerous {10-12} extension twins are formed. In the lower region of the bent specimen (denoted as TZ), small quantities of {10-12} extension twins, {10-11} contraction twins, and {10-11}-{10-12} double twins are formed, and most of the bending deformation is accommodated by dislocation slip. In the central region of the bent specimen (denoted as NZ), few twins are formed, and the microstructural characteristics of this region are almost identical to those of the initial material. When the bent specimen is aged, the peak-aging time of the CZ and TZ (8 h) is 60% shorter than that of the NZ (20 h), which is attributed to the accelerated precipitation caused by the abundant twins in and high internal strain energy of the CZ and TZ. In the CZ, nucleation and growth of continuous Mg17Al12 precipitates (CPs) occur rapidly, especially inside the {10-12} twins, and this accelerated CP formation inhibits the formation of discontinuous Mg17Al12 precipitates (DPs). Because of the high internal strain energy of the TZ, promoted formation of CPs occurs in the early stage of aging, which, in turn, suppresses the formation of DPs. In contrast, the NZ, because of its low internal strain energy and insufficient twins, exhibits slower CP formation behavior and has a considerably larger amount of DPs than the CZ and TZ. Although the bending deformation before aging induces inhomogeneous precipitation behaviors, the pre bending deformation shortens the overall peak-aging time of the material and increases its peak hardness. (C) 2022 Elsevier B.V. All rights reserved. | Lee, Gyo Myeong; Lee, Jong Un; Park, Sung Hyuk | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | Park, Sung-Hyuk/AAE-6726-2022 | 57222810183; 57195056728; 54786002500 | sh.park@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 918 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 0.62 | 2025-06-25 | 7 | 8 | AZ80 alloy; Bending; Aging; Precipitation; Hardness | AGE-HARDENING RESPONSE; MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; HEAT-TREATMENT; PRE-DEFORMATION; MICROSTRUCTURE; EXTRUSION; CA; PRECOMPRESSION; IMPROVEMENT | Aging; AZ80 alloy; Bending; Hardness; Precipitation | Aluminum alloys; Bending (deformation); Bending (forming); Binary alloys; Hardness; Strain energy; Ageing behavior; Aging time; Az80 alloy; Bend specimens; Bending; Inhomogeneous ageing; Internal strains; Peak aging; Precipitation behaviour; Precipitation kinetics; Precipitation (chemical) | English | 2022 | 2022-10-15 | 10.1016/j.jallcom.2022.165613 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Article | Beneficial effects of cellular coinfection resolve inefficiency in influenza A virus transcription | For diverse viruses, cellular infection with single vs. multiple virions can yield distinct biological outcomes. We previously found that influenza A/guinea fowl/Hong Kong/WF10/99 (H9N2) virus (GFHK99) displays a particularly high reliance on multiple infection in mammalian cells. Here, we sought to uncover the viral processes underlying this phenotype. We found that the need for multiple infection maps to amino acid 26K of the viral PA protein. PA 26K suppresses endonuclease activity and viral transcription, specifically within cells infected at low multiplicity. In the context of the higher functioning PA 26E, inhibition of PA using baloxavir acid augments reliance on multiple infection. Together, these data suggest a model in which sub-optimal activity of the GFHK99 endonuclease results in inefficient priming of viral transcription, an insufficiency which can be overcome with the introduction of additional viral ribonucleoprotein templates to the cell. More broadly, the finding that deficiency in a core viral function is ameliorated through multiple infection suggests that the fitness effects of many viral mutations are likely to be modulated by multiplicity of infection, such that the shape of fitness landscapes varies with viral densities. | Shartouny, Jessica R.; Lee, Chung-Young; Delima, Gabrielle K.; Lowen, Anice C. | Emory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322 USA; Emory Ctr Excellence Influenza Res & Response Emo, Atlanta, GA 30322 USA; Kyungpook Natl Univ, Dept Microbiol, Sch Med, Daegu, South Korea | anice.lowen@emory.edu; | PLOS PATHOGENS | PLOS PATHOG | 1553-7366 | 1553-7374 | 18 | 9 | SCIE | MICROBIOLOGY;PARASITOLOGY;VIROLOGY | 2022 | 6.7 | 9.5 | 2 | RNA-SYNTHESIS; PA-X; DENSITY | English | 2022 | 2022-09 | 10.1371/journal.ppat.1010865 | 바로가기 | 바로가기 | 바로가기 | |||||||||||
| ○ | Article | Energy harvesting from human body heat using highly flexible thermoelectric generator based on Bi2Te3 particles and polymer composite | Energy harvesting technology is in high demand for self-powered devices. Flexible thermoelectric generators (f-TEGs) have attracted considerable attention for application in wearable electronics, which can be applied to healthcare and smart clothing. However, previous f-TEGs still have limitations such lack of novel research focus concerning its wearable applications and complicated and high-cost fabrication procedures. This study reports an f-TEG comprising Bi2Te3-based thermoelectric composite films on a flexible substrate to demonstrate thermoelectric energy conversion from the human body. To verify the thermoelectric energy harvesting efficiency of the energy harvester based on temperature gradients, an f-TEG was developed by placing p-type Bi0.5Sb1.5Te3 (BST) of 133 μWm−1K−2 and n-type Bi2Te2.7Se0.3 (BTS) of 124 μWm−1K−2 thermoelectric films. The fabricated f-TEG harvested an output voltage of 18.13 mV, current signal of 2.74 μA, and output power of ≈ 12.6 nW at ΔT = 25 K. The theoretical thermoelectric potential distribution of the f-TEG was confirmed by finite element analysis using multiphysics simulation. Furthermore, we investigated the biological output performance of the f-TEG on the human body, which showed the output performance of ≈ 0.38 μA and ≈ 2.3 mV. This study presents the possibility of harvesting thermal energy from human body heat, which will be useful for improving wearable device applications. © 2022 Elsevier B.V. | Na, Yujin; Kim, Seoha; Mallem, Siva Pratap Reddy; Yi, Seonghoon; Kim, Kyung Tae; Park, Kwi-Il | School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, South Korea; School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, South Korea; School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, South Korea; School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, South Korea; Powder Materials Division, Korea Institute of Materials Science, Gyeongnam, Changwon, 51508, South Korea; School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, South Korea | 57566141800; 57212495287; 55422639100; 14008383000; 56984373000; 35280874200 | ktkim@kims.re.kr; | Journal of Alloys and Compounds | J ALLOY COMPD | 0925-8388 | 1873-4669 | 924 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 3.44 | 2025-06-25 | 41 | Bi<sub>2</sub>Te<sub>3</sub>; Energy harvesting; Flexible thermoelectric generator; Thermoelectric; Thermoelectric film | Antimony compounds; Bismuth compounds; Electric generators; Flexible electronics; Hosiery manufacture; Selenium compounds; Tellurium compounds; Thermoelectric energy conversion; Thermoelectric equipment; Thermoelectricity; Wearable technology; Body heats; Flexible thermoelectric generator; High demand; Human bodies; Output performance; Particle composites; Polymer composite; Thermoelectric; Thermoelectric film; Thermoelectric generators; Energy harvesting | English | Final | 2022 | 10.1016/j.jallcom.2022.166575 | 바로가기 | 바로가기 | 바로가기 |
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