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arXiv 2024年

作者： Huijben, Evi M.C. Terpstra, Maarten L. Galapon, Arthur Pai, Suraj Thummerer, Adrian Koopmans, Peter Afonso, Manya van Eijnatten, Maureen Gurney-Champion, Oliver Chen, Zeli Zhang, Yiwen Zheng, Kaiyi Li, Chuanpu Pang, Haowen Ye, Chuyang Wang, Runqi Song, Tao Fan, Fuxin Qiu, Jingna Huang, Yixing Ha, Juhyung Park, Jong Sung Alain-Beaudoin, Alexandra Bériault, Silvain Yu, Pengxin Guo, Hongbin Huang, Zhanyao Li, Gengwan Zhang, Xueru Fan, Yubo Liu, Han Xin, Bowen Nicolson, Aaron Zhong, Lujia Deng, Zhiwei Müller-Franzes, Gustav Khader, Firas Li, Xia Zhang, Ye Hémon, Cédric Boussot, Valentin Zhang, Zhihao Wang, Long Bai, Lu Wang, Shaobin Mus, Derk Kooiman, Bram Sargeant, Chelsea A.H. Henderson, Edward G.A. Kondo, Satoshi Kasai, Satoshi Karimzadeh, Reza Ibragimov, Bulat Helfer, Thomas Dafflon, Jessica Chen, Zijie Wang, Enpei Perko, Zoltan Maspero, Matteo Department of Biomedical Engineering Eindhoven University of Technology Eindhoven Netherlands Radiotherapy Department University Medical Center Utrecht Utrecht Netherlands Computational Imaging Group for MR Diagnostics & Therapy University Medical Center Utrecht Utrecht Netherlands Department of Radiation Oncology University Medical Center Groningen University of Groningen Groningen Netherlands GROW School for Oncology Maastricht University Medical Centre Maastricht Netherlands Department of Radiation Oncology LMU University Hospital LMU Munich Munich Germany Department of Radiation Oncology Radboud University Medical Center Nijmegen Netherlands Wageningen University & Research Wageningen Plant Research Wageningen Netherlands Department of Radiology and Nuclear Medicine Amsterdam UMC Location University of Amsterdam Amsterdam Netherlands Cancer Center Amsterdam Imaging and Biomarkers Amsterdam Netherlands School of Biomedical Engineering Southern Medical University Guangzhou China School of Integrated Circuits and Electronics Beijing Institute of Technology Beijing China School of Biomedical Engineering ShanghaiTech University Shanghai China Fudan University Shanghai China Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Germany Indiana University Bloomington United States Advanced Development Engineering Elekta Ltd Montreal Canada Infervision Medical Technology Co. Ltd. Beijing China Department of Biomedical Engineering Shantou University China Independent researchers Department of Computer Science Vanderbilt University Nashville United States Australian e-Health Research Centre CSIRO HerstonQLD Australia Los AngelesCA United States University Hospital Aachen Aachen Germany Center for Proton Therapy Paul Scherrer Institut Villigen Switzerland Department of Computer Science ETH Zurich Zurich Switzerland University Rennes 1 CLCC Eugène Marquis INSERM LTSI Rennes France Subtle Medical Shanghai China MedMind Technology Co.

Radiation therapy plays a crucial role in cancer treatment, necessitating precise delivery of radiation to tumors while sparing healthy tissues over multiple days. Computed tomography (CT) is integral for treatment planning, offering electron density data crucial for accurate dose calculations. However, accurately representing patient anatomy is challenging, especially in adaptive radiotherapy, where CT is not acquired daily. Magnetic resonance imaging (MRI) provides superior soft-tissue contrast. Still, it lacks electron density information, while cone beam CT (CBCT) lacks direct electron density calibration and is mainly used for patient positioning. Adopting MRI-only or CBCT-based adaptive radiotherapy eliminates the need for CT planning but presents challenges. Synthetic CT (sCT) generation techniques aim to address these challenges by using image synthesis to bridge the gap between MRI, CBCT, and CT. The SynthRAD2023 challenge was organized to compare synthetic CT generation methods using multi-center ground truth data from 1080 patients, divided into two tasks: 1) MRI-to-CT and 2) CBCT-to-CT. The evaluation included image similarity and dose-based metrics from proton and photon plans. The challenge attracted significant participation, with 617 registrations and 22/17 valid submissions for tasks 1/2. Top-performing teams achieved high structural similarity indices (≥ 0.87/0.90) and gamma pass rates for photon (≥ 98.1%/99.0%) and proton (≥ 97.3%/97.0%) plans. However, no significant correlation was found between image similarity metrics and dose accuracy, emphasizing the need for dose evaluation when assessing the clinical applicability of sCT. SynthRAD2023 facilitated the investigation and benchmarking of sCT generation techniques, providing insights for developing MRI-only and CBCT-based adaptive radiotherapy. It showcased the growing capacity of deep learning to produce high-quality sCT, reducing reliance on conventional CT for treatment planning. © 2024, CC

关键词： Radiotherapy

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Uncovering hidden dependency in weighted networks via information entropy

arXiv

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arXiv 2020年

作者： Lee, Mi Jin Lee, Eun Lee, Byunghwee Jeong, Hawoong Lee, Deok-Sun Lee, Sang Hoon Department of Applied Physics Hanyang University Ansan15588 Korea Republic of BioFrontiers Institute University of Colorado BoulderCO80303 United States National Science Museum Daejeon34141 Korea Republic of Department of Physics Korea Advanced Institute of Science and Technology Daejeon34143 Korea Republic of Natural Science Research Institute Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of Department of Physics Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of School of Computational Sciences Korea Institute for Advanced Study Seoul02455 Korea Republic of Department of Physics and Research Institute of Natural Science Gyeongsang National University Jinju52828 Korea Republic of Future Convergence Technology Research Institute Gyeongsang National University Jinju52849 Korea Republic of

Interactions between elements, which are usually represented by networks, have to delineate potentially unequal relationships in terms of their relative importance or direction. The intrinsic unequal relationships of such kind, however, are opaque or hidden in numerous real systems. For instance, when a node in a network with limited interaction capacity spends its capacity to its neighboring nodes, the allocation of the total amount of interactions to them can be vastly diverse. Even if such potentially heterogeneous interactions epitomized by weighted networks are observable, as a result of the aforementioned ego-centric allocation of interactions, the relative importance or dependency between two interacting nodes can only be implicitly accessible. In this work, we precisely pinpoint such relative dependency by proposing the framework to discover hidden dependent relations extracted from weighted networks. For a given weighted network, we provide a systematic criterion to select the most essential interactions for individual nodes based on the concept of information entropy. The criterion is symbolized by assigning the effective number of neighbors or the effective out-degree to each node, and the resultant directed subnetwork decodes the hidden dependent relations by leaving only the most essential directed interactions. We apply our methodology to two time-stamped empirical network data, namely the international trade relations between nations in the world trade web (WTW) and the network of people in the historical record of Korea, Annals of the Joseon Dynasty (AJD). Based on the data analysis, we discover that the properties of mutual dependency encoded in the two systems are vastly different. The nations in the WTW show much more asymmetric dependent relations than its random counterpart, which implies the global economic inequality in international trades. In contrast, the relationships of people in the AJD are much more mutual than the nations in the WTW. T

关键词： International trade

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Correction to: Cr(VI) Removal from Aqueous Solution Using a Magnetite Snail Shell

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Water, Air, & Soil Pollution 2021年第4期232卷 1-2页

作者： Hoang, Le Phuong Nguyen, Thi Minh Phuong Van, Huu Tap Hoang, Thi Kim Dung Vu, Xuan Hoa Nguyen, Tien Vinh Ca, N. X. Faculty of Civil and Environmental Engineering Thai Nguyen University of Technology (TNUT) Thai Nguyen Vietnam Faculty of Environment and Chemical Engineering Duy Tan University (DTU) Da Nang Vietnam Faculty of Natural Resources and Environment TNU – University of Sciences (TNUS) Thai Nguyen Vietnam Institute of Research and Development Duy Tan University Da Nang Vietnam Faculty of Engineering and IT University of Technology Sydney (UTS) Sydney Australia Laboratory of Advanced Materials Chemistry Advanced Institute of Materials Science Ton Duc Thang University Ho Chi Minh City Vietnam Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City Vietnam

A Correction to this paper has been published: https://***/10.1007/s11270-021-05092-5

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Determination of responses of liquid xenon to low energy electron and nuclear recoils using a PandaX-Ⅱ detector

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Chinese Physics C 2021年第7期45卷 273-282页

作者： Binbin Yan Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Peiyao Huang Yan Huang Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie Li Jianglai Liu Zhuoqun Lei Wenbo Ma Yugang Ma Yajun Mao Yue Meng Kaixiang Ni Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Lin Si Guofang Shen Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Rui Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Jianfeng Yue Xinning Zeng Dan Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou School of Physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Laboratory for Particle Astrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of Physics Nankai UniversityTianjin 300071China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy Physics Peking UniversityBeijing 100871China

We present a systematic determination of the responses of PandaX-Ⅱ,a dual phase xenon time projection chamber detector,to low energy *** electron recoil(ER) and nuclear recoil(NR) responses are calibrated,respectively,with injected tritiated methane or 220Rn source,and with 241Am-Be neutron source,in an energy range from 1-25 keV(ER) and 4-80 keV(NR),under the two drift fields,400 and 317 V/*** empirical model is used to fit the light yield and charge yield for both types of *** best fit models can describe the calibration data *** systematic uncertainties of the fitted models are obtained via statistical comparison to the data.

关键词： dark matter liquid xenon time projection chamber calibration electron recoil nucleon recoil NEST2.0

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Improved Electrocatalytic Activity and Stability by Single Iridium Atoms on Iron-based Layered Double Hydroxides for Oxygen Evolution

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Angewandte Chemie 2023年第43期135卷

作者： Jing Cao Tong Mou Bingbao Mei Pengfei Yao Ce Han Xue Gong Ping Song Prof. Zheng Jiang Prof. Thomas Frauenheim Prof. Jianping Xiao Prof. Weilin Xu State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China University of Science and Technology of China Anhui 230026 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Dalian National Laboratory for Clean Energy Chinese Academy of Sciences Dalian 116023 P. R. China Beijing Computational Science Research Center Beijing 100193 P. R. China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201800 P. R. China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230026 China Shenzhen JL Computational and Applied Research Institute Shenzhen 518131 P. R. China Bremen Center for Computational Materials Science University of Bremen 28359 Bremen Germany

Full understanding to the origin of the catalytic performance of a supported nanocatalyst from the points of view of both the active component and support is significant for the achievement of high performance. Herein, based on a model electrocatalyst of single-iridium-atom-doped iron (Fe)-based layered double hydroxides (LDH) for oxygen evolution reaction (OER), we reveal the first completed origin of the catalytic performance of such supported nanocatalysts. Specially, besides the activity enhancement of Ir sites by LDH support, the stability of surface Fe sites is enhanced by doped Ir sites: DFT calculation shows that the Ir sites can reduce the activity and enhance the stability of the nearby Fe sites; while further finite element simulations indicate, the stability enhancement of distant Fe sites could be attributed to the much low concentration of OER reactant (hydroxyl ions, OH − ) around them induced by the much fast consumption of OH − on highly active Ir sites. These new findings about the interaction between the main active components and supports are applicable in principle to other heterogeneous nanocatalysts and provide a completed understanding to the catalytic performance of heterogeneous nanocatalysts.

关键词： Activity Fe Based on LDH OER Single Atom Iridium Catalysts Stability

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Interlayer engineering of lattice dynamics and elastic constants of 2D layered nanomaterials under pressure

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Nature Communications 2025年第1期16卷 1-9页

作者： Du, Guoshuai Zhao, Lili Li, Shuchang Huang, Jing Fang, Susu Han, Wuxiao Li, Jiayin Du, Yubing Ming, Jiaxin Zhang, Tiansong Zhang, Jun Kang, Jun Li, Xiaoyan Xu, Weigao Chen, Yabin Advanced Research Institute of Multidisciplinary Sciences (ARIMS) Beijing Institute of Technology Beijing China School of Aerospace Engineering Beijing Institute of Technology Beijing China State Key Laboratory of Coordination Chemistry Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing China Mechano-X Institute Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Beijing China Beijing Computational Science Research Center Beijing China School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing China Institute of Semiconductors Chinese Academy of Sciences Beijing China BIT Chongqing Institute of Microelectronics and Microsystems Chongqing China

Interlayer coupling in two-dimensional (2D) layered nanomaterials can provide us strategies to evoke their superior properties, such as the layer-dependent phonon vibration, the formation of moiré excitons and related nontrivial topology. However, to accurately quantify interlayer potential and further measure elastic properties of 2D materials remain challenging, despite significant efforts. Herein, the layer-dependent lattice dynamics and elastic constants of 2D nanomaterials have been systematically investigated via pressure-engineering strategy based on ultralow frequency Raman spectroscopy. The shear and layer-breathing modes Raman shifts of 2H-MoS₂ with various thicknesses are analyzed by the monoatomic chain model (MCM). Intriguingly, it is found that the layer-dependent dω/dP of shear (S_N,1) and breathing (LB_N,N-1) modes display the opposite trends, quantitatively consistent with MCM analysis, our molecular dynamics simulations and density functional theory calculations. The diatomic chain model is combined with Raman data to analyze the intralayer and interlayer shear force constants and their pressure coefficients, revealing a strong dependence on the number of layers. These results can be generalized to other van der Waals systems, and may shed light on the potential applications of 2D materials in nanomechanics and nanoelectronics. © The Author(s) 2025.

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Histamine activates HinK to promote the virulence of Pseudomonas aeruginosa

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science Bulletin 2021年第11期66卷 1101-1118,M0004页

作者： Yaya Wang Qiao Cao Qin Cao Jianhua Gan Ning Sun Cai-Guang Yang Taeok Bae Min Wu Lefu Lan State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China College of Life Science Northwest UniversityXi'an 710069China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Genetic Engineering Shanghai Public Health Clinical CenterCollaborative Innovation Center of Genetics and DevelopmentSchool of Life SciencesFudan UniversityShanghai 201438China The State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHong Kong 999077China School of Pharmaceutical Science and Technology Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Department of Microbiology and Immunology Indiana University School of Medicine-NorthwestGary IN 46408USA Department of Biomedical Sciences University of North DakotaGrand Forks ND 58203-9037USA NMPA Key Laboratory for Testing Technology of Pharmaceutical Microbiology Shanghai Institute for Food and Drug ControlShanghai 201203China

During infections,bacteria stimulate host cells to produce and release histamine,which is a key mediator of vital cellular processes in ***,the mechanisms underlying the bacterial cell’s ability to sense and respond to histamine are poorly ***,we show that HinK,a Lys R-type transcriptional regulator,is required to evoke responses to histamine in Pseudomonas aeruginosa,an important human *** directly binds to and activates the promoter of genes involved in histamine uptake and metabolism,iron acquisition,and Pseudomonas quinolone signal(PQS)*** transcriptional regulatory activity of HinK is induced when histamine is present,and it occurs when HinK binds with imidazole-4-acetic acid(Im AA),a histamine metabolite whose production in *** depends on the HinK-activated histamine uptake and utilization operon hin ***,the inactivation of HinK inhibits diverse pathogenic phenotypes of *** results suggest that histamine acts as an interkingdom signal and provide insights into the mechanism used by pathogenic bacteria to exploit host regulatory signals to promote virulence.

关键词： Pseudomonas aeruginosa Histamine Metabolism Host-microbe interaction Virulence

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The structure of the stellar halo of the Andromeda galaxy explored with the NB515 for Subaru/HSC. I.: New insights on the stellar halo up to 120 kpc

arXiv

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arXiv 2024年

作者： Ogami, Itsuki Tanaka, Mikito Komiyama, Yutaka Chiba, Masashi Guhathakurta, Puragra Kirby, Evan N. Wyse, Rosemary F.G. Filion, Carrie Gilbert, Karoline M. Escala, Ivanna Mori, Masao Kirihara, Takanobu Tanaka, Masayuki Ishigaki, Miho N. Hayashi, Kohei Lee, Myung Gyoon Sharma, Sanjib Kalirai, Jason S. Lupton, Robert H. 2-21-1 Osawa Mitaka Tokyo181-8588 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Advanced Sciences Faculty of Science and Engineering Hosei University 3-7-2 Kajino-cho Koganei Tokyo184-8584 Japan Astronomical Institute Tohoku University Aoba-ku Miyagi Sendai980-8578 Japan Department of Astronomy and Astrophysics University of California Santa Cruz University of California Observatories 1156 High Street Santa CruzCA95064 United States Department of Physics and Astronomy University of Notre Dame Notre DameIN46556 United States Department of Physics and Astronomy Johns Hopkins University BaltimoreMD21218 United States Center for Computational Astrophysics Flatiron Institute New YorkNY10010 United States John Hopkins Applied Physics Laboratory 11100 Johns Hopkins Road LaurelMD20723 United States Space Telescope Science Institute 3700 San Martin Dr. BaltimoreMD21218 United States The Observatories of the Carnegie Institution for Science 813 Santa Barbara Street PasadenaCA91101 United States Faculty of Pure and Applied Physics University of Tsukuba Tennodai 1-1-1 Ibaraki Tsukuba305-8577 Japan Center for Computational Sciences University of Tsukuba Tennodai 1-1-1 Ibaraki Tsukuba305-8577 Japan Kitami Institute of Technology 165 Koen-cho Hokkaido Kitami090-8507 Japan National Institute of Technology Sendai College Miyagi Natori981-1239 Japan Astronomy Program Department of Physics and Astronomy SNU Astronomy Research Center Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Department of Astrophysical Sciences Princeton University 4 Ivy Lane PrincetonNJ08544 United States

We analyse the M31 halo and its substructure within a projected radius of 120 kpc using a combination of Subaru/HSC NB515 and CFHT/MegaCam g- & i-bands. We succeed in separating M31’s halo stars from foreground contamination with ∼ 90 % accuracy by using the surface gravity sensitive NB515 filter. Based on the selected M31 halo stars, we discover three new substructures, which associate with the Giant Southern Stream (GSS) based on their photometric metallicity estimates. We also produce the distance and photometric metallicity estimates for the known substructures. While these quantities for the GSS are reproduced in our study, we find that the North-Western stream shows a steeper distance gradient than found in an earlier study, suggesting that it is likely to have formed in an orbit closer to the Milky Way. For two streams in the eastern halo (Stream C and D), we identify distance gradients that had not been resolved. Finally, we investigate the global halo photometric metallicity distribution and surface brightness profile using the NB515-selected halo stars. We find that the surface brightness of the metal-poor and metal-rich halo populations, and the all population can be fitted to a power-law profile with an index of α = −1.65 ± 0.02, −2.82 ± 0.01, and −2.44 ± 0.01, respectively. In contrast to the relative smoothness of the halo profile, its photometric metallicity distribution appears to be spatially non-uniform with nonmonotonic trends with radius, suggesting that the halo population had insufficient time to dynamically homogenize the accreted populations. Copyright © 2024, The Authors. All rights reserved.

关键词： Luminance

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A simple and efficient liposome-based biosensor for visual monitoring of Cu²⁺-bipyridine complex formation

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Microchemical Journal 2025年 214卷

作者： Tran, Vy Anh Vo, Thu Thao Thi Lee, Sang-Wha Phan, Thien-Vy Le, Van Thuan Department of Material Science Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University Ho Chi Minh City 700000 Viet Nam Department of Food Science and Biotechnology Gachon University 1342 Seongnamdaero Sujeong-gu Seongnam-si 13120 Cuba Department of Chemical and Biological Engineering Gachon University Seongnam-si 1342 Gyeonggi-do 461-701 Cuba Faculty of Pharmacy Nguyen Tat Thanh University Ho Chi Minh City 700000 Viet Nam Center for Advanced Chemistry Institute of Research and Development Duy Tan University 03 Quang Trung Da Nang 550000 Viet Nam

This study presents the development of a novel liposome-based colorimetric sensor designed for the detection of 2,2′-bipyridine (BP) and its interaction with Cu2+ ions, resulting in the formation of a dark red comple... 详细信息

This study presents the development of a novel liposome-based colorimetric sensor designed for the detection of 2,2′-bipyridine (BP) and its interaction with Cu2⁺ ions, resulting in the formation of a dark red complex visible to the naked eye. The liposomes encapsulate BP, which is released under controlled conditions. The effects of environmental factors, such as temperature, pH fluctuations, and Triton X100-induced membrane disruption, on the release dynamics are systematically analyzed. The study employs UV–vis spectroscopy to monitor the release kinetics and elucidate the mechanisms of liposome destabilization and BP-Cu2⁺ complex formation. The optimized conditions for Triton X100 and Cu2⁺ concentrations enhance the sensor's sensitivity, making it highly efficient for real-time detection. This sensor, which outperforms traditional cysteine-mediated AuNP aggregation and ligand-receptor systems, offers significant advantages in terms of simplicity, cost-effectiveness, and portability. It holds great potential for applications in environmental monitoring and medical diagnostics, providing a versatile and efficient platform for visual detection in field-deployable diagnostic tools. © 2025 Elsevier B.V.

关键词： 2,2′-Bipyridine Colorimetric detection Cu2+ interaction Liposome-based sensor Triton X100 disruption

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Detections of [C ii] 158 µm and [O iii] 88 µm in a Local Lyman Continuum Emitter, Mrk 54, and its Implications to High-redshift ALMA Studies

arXiv

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arXiv 2023年

作者： Ura, Ryota Hashimoto, Takuya Inoue, Akio K. Fadda, Dario Hayes, Matthew Puschnig, Johannes Zackrisson, Erik Tamura, Yoichi Matsuo, Hiroshi Mawatari, Ken Fudamoto, Yoshinobu Hagimoto, Masato Kuno, Nario Sugahara, Yuma Yamanaka, Satoshi Bakx, Tom J.L.C. Nakazato, Yurina Usui, Mitsutaka Yajima, Hidenobu Yoshida, Naoki Division of Physics Faculty of Pure and Applied Sciences University of Tsukuba Ibaraki Tsukuba305-8571 Japan Faculty of Pure and Applied Sciences University of Tsukuba Ibaraki Tsukuba305-8571 Japan Department of Physics School of Advanced Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Waseda Research Institute for Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan SOFIA Science Center Universities Space Research Association MS 232-11 Moffett Field CA94035 United States The Oskar Klein Centre Department of Astronomy Stockholm University AlbaNova StockholmSE-10691 Sweden Argelander-Institut für Astronomie Auf dem Hügel 71 BonnD-53121 Germany Observational Astrophysics Department of Physics and Astronomy Uppsala University Box 516 UppsalaSE-751 20 Sweden Department of Physics Graduate School of Science Nagoya University Nagoya464-8602 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan General Education Department National Institute of Technology Toba College 1-1 Ikegami-cho Toba Mie517-8501 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo Japan Department of Physics School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Center for Computational Sciences University of Tsukuba Ten-nodai 1-1-1 Tsukuba Ibaraki305-8577 Japan UT Institute for Advanced Study The University of Tokyo Chiba Kashiwa277-8583 Japan

We present integral field, far-infrared (FIR) spectroscopy of Mrk 54, a local Lyman Continuum Emitter (LCE), obtained with FIFI-LS on the Stratospheric Observatory for Infrared Astronomy. This is only the second time, after Haro 11, that [C ii] 158 µm and [O iii] 88 µm spectroscopy of the known LCEs have been obtained. We find that Mrk 54 has a strong [C ii] emission that accounts for ∼ 1% of the total FIR luminosity, whereas it has only moderate [O iii] emission, resulting in the low [O iii]/[C ii] luminosity ratio of 0.22 ± 0.06. In order to investigate whether [O iii]/[C ii] is a useful tracer of fesc (LyC escape fraction), we examine the correlations of [O iii]/[C ii] and (i) the optical line ratio of O32 ≡ [O iii] 5007 Å/[O ii] 3727 Å, (ii) specific star formation rate, (iii) [O iii] 88 µm/[O i] 63 µm ratio, (iv) gas phase metallicity, and (v) dust temperature based on a combined sample of Mrk 54 and the literature data from the Herschel Dwarf Galaxy Survey and the LITTLE THINGS Survey. We find that galaxies with high [O iii]/[C ii] luminosity ratios could be the result of high ionization (traced by O32), bursty star formation, high ionized-to-neutral gas volume filling factors (traced by [O iii] 88 µm/[O i] 63 µm), and low gas-phase metallicities, which is in agreement with theoretical predictions. We present an empirical relation between the [O iii]/[C ii] ratio and fesc based on the combination of the [O iii]/[C ii] and O32 correlation, and the known relation between O32 and fesc. The relation implies that high-redshift galaxies with high [O iii]/[C ii] ratios revealed by ALMA may have fesc & 0.1, significantly contributing to the cosmic reionization. © 2023, CC0.

关键词： Luminance

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