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arXiv 2023年

作者： Callahan, Tiffany J. Tripodi, Ignacio J. Stefanski, Adrianne L. Cappelletti, Luca Taneja, Sanya B. Wyrwa, Jordan M. Casiraghi, Elena Matentzoglu, Nicolas A. Reese, Justin Silverstein, Jonathan C. Hoyt, Charles Tapley Boyce, Richard D. Malec, Scott A. Unni, Deepak R. Joachimiak, Marcin P. Robinson, Peter N. Mungall, Christopher J. Cavalleri, Emanuele Fontana, Tommaso Valentini, Giorgio Mesiti, Marco Gillenwater, Lucas A. Santangelo, Brook Vasilevsky, Nicole A. Hoehndorf, Robert Bennett, Tellen D. Ryan, Patrick B. Hripcsak, George Kahn, Michael G. Bada, Michael Baumgartner, William A. Hunter, Lawrence E. Computational Bioscience Program University of Colorado Anschutz Medical Campus AuroraCO80045 United States Department of Biomedical Informatics Columbia University Irving Medical Center New YorkNY10032 United States Computer Science Department Interdisciplinary Quantitative Biology University of Colorado Boulder BoulderCO80301 United States AnacletoLab Computer Science Department University of Milan 20122 Italy Intelligent Systems Program University of Pittsburgh PittsburghPA15260 United States Department of Physical Medicine and Rehabilitation School of Medicine University of Colorado Anschutz Medical Campus AuroraCO80045 United States Division of Environmental Genomics and Systems Biology Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Semanticly Ltd Athens Greece Department of Biomedical Informatics University of Pittsburgh School of Medicine PittsburghPA15206 United States Laboratory of Systems Pharmacology Harvard Medical School BostonMA02115 United States Division of Translational Informatics University of New Mexico School of Medicine AlbuquerqueNM87131 United States SIB Swiss Institute of Bioinformatics Basel Switzerland Berlin Institute of Health at Charité-Universitatsmedizin Berlin10117 Germany ELLIS European Laboratory for Learning and Intelligent Systems Germany Department of Biomedical Informatics University of Colorado School of Medicine AuroraCO80045 United States Data Collaboration Center Critical Path Institute 1840 E River Rd. Suite 100 TucsonAZ85718 United States Computer Electrical and Mathematical Sciences & Engineering Division Computational Bioscience Research Center King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia Department of Pediatrics University of Colorado School of Medicine AuroraCO80045 United States Janssen Research and Development RaritanNJ08869 United States Division of General Internal Medicine University of Colorado School of Medicine A

Translational research requires data at multiple scales of biological organization. Advancements in sequencing and multi-omics technologies have increased the availability of these data, but researchers face significant integration challenges. Knowledge graphs (KGs) are used to model complex phenomena, and methods exist to construct them automatically. However, tackling complex biomedical integration problems requires flexibility in the way knowledge is modeled. Moreover, existing KG construction methods provide robust tooling at the cost of fixed or limited choices among knowledge representation models. PheKnowLator (Phenotype Knowledge Translator) is a semantic ecosystem for automating the FAIR (Findable, Accessible, Interoperable, and Reusable) construction of ontologically grounded KGs with fully customizable knowledge representation. The ecosystem includes KG construction resources (e.g., data preparation APIs), analysis tools (e.g., SPARQL endpoints and abstraction algorithms), and benchmarks (e.g., prebuilt KGs and embeddings). We evaluated the ecosystem by systematically comparing it to existing open-source KG construction methods and by analyzing its computational performance when used to construct 12 large-scale KGs. With flexible knowledge representation, PheKnowLator enables fully customizable KGs without compromising performance or usability. © 2023, CC BY.

关键词： Ecosystems

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Toward Quantification and Visualization of Active Stress Waves for Myocardial Biomechanical Function Assessment

Toward Quantification and Visualization of Active Stress Wav...

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2019 Computing in Cardiology, CinC 2019

作者： Otani, Niels F. Linte, Cristian A. Dang, Dylan Beam, Christopher Mohammadi, Fariba Wentz, Brian Kamrul Hasan, S.M. Shontz, Suzanne M. Schwarz, Karl Q. Thomas, Sabu Rochester Institute of Technology School of Mathematical Sciences RochesterNY United States Mechanical Engineering University of Kansas LawrenceKS United States Bioengineering Graduate Program University of Kansas LawrenceKS United States Center for Imaging Science Rochester Institute of Technology RochesterNY United States Electrical Engineering and Computer Science University of Kansas LawrenceKS United States Division of Cardiology University of Rochester Medical Center RochesterNY United States RochesterNY14467 United States

ISBN: (纸本)9781728169361

Estimating and visualizing myocardial active stress wave patterns is crucial to understanding the mechanical activity of the heart and provides a potential non-invasive method to assess myocardial function. These patterns can be reconstructed by analyzing 2D and/or 3D tissue displacement data acquired using medical imaging. Here we describe an application that utilizes a 3D finite element formulation to reconstruct active stress from displacement data. As a proof of concept, a simple cubic mesh was used to represent a myocardial tissue "sample" consisting of a 10 x 10 x 10 lattice of nodes featuring different fiber directions that rotate with depth, mimicking cardiac transverse isotropy. In the forward model, tissue deformation was generated using a test wave with active stresses that mimic the myocardial contractile forces. The generated deformation field was used as input to an inverse model designed to reconstruct the original active stress distribution. We numerically simulated malfunctioning tissue regions (experiencing limited contractility and hence active stress) within the healthy tissue. We also assessed model sensitivity by adding noise to the deformation field generated using the forward model. The difference image between the original and reconstructed active stress distribution suggests that the model accurately estimates active stress from tissue deformation data with a high signal-to-noise ratio. © 2019 Creative Commons.

关键词： Medical imaging

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Anethole mitigates H2O2-induced inflammation in HIG-82 synoviocytes by suppressing the aquaporin 1 expression and activating the protein kinase A pathway

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Environmental Toxicology 2024年第2期39卷 965-978页

作者： Huang, Tai-Lung Chang, Yu-Chun Tsai, Bruce Chi-Kang Chen, Tung-Sheng Kao, Shih-Wen Tsai, Yung-Yun Lin, Shinn-Zong Yao, Chun-Hsu Lin, Kuan-Ho Kuo, Wei-Wen Huang, Chih-Yang Department of Biological Science and Technology College of Life Sciences China Medical University Taichung Taiwan Department of Orthopedics Chung-Kang Branch Cheng Ching General Hospital Taichung Taiwan Cardiovascular and Mitochondrial Related Disease Research Center Hualien Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Hualien Taiwan School of Life Science National Taiwan Normal University Taipei Taiwan Department of Orthopaedic Surgery Chung-Shan Medical University Hospital Taichung Taiwan Department of Physical Therapy Asia University Taichung Taiwan Department of Neurosurgery Hualien Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Hualien Taiwan Bioinnovation Center Buddhist Tzu Chi Medical Foundation Hualien Taiwan Department of Biomedical Imaging and Radiological Science China Medical University Taichung Taiwan School of Chinese Medicine China Medical University Taichung Taiwan Biomaterials Translational Research Center China Medical University Hospital Taichung Taiwan Department of Bioinformatics and Medical Engineering Asia University Taichung Taiwan Division of Cardiovascular Medicine Department of Internal Medicine China Medical University Hospital Taichung Taiwan Department of Emergency Medicine China Medical University Hospital Taichung Taiwan College of Medicine China Medical University Taichung Taiwan Ph.D. Program for Biotechnology Industry China Medical University Taichung Taiwan Department of Medical Research China Medical University Hospital China Medical University Taichung Taiwan Graduate Institute of Biomedical Sciences China Medical University Taichung Taiwan Department of Medical Laboratory Science and Biotechnology Asia University Taichung Taiwan Center of General Education Buddhist Tzu Chi Medical Foundation Tzu Chi University of Science and Technology Hualien Taiwan

Rheumatoid arthritis (RA) is an autoimmune inflammatory disease affecting approximately 1% of the global population, with a higher prevalence in women than in men. Chronic inflammation and oxidative stress play pivotal roles in the pathogenesis of RA. Anethole, a prominent compound derived from fennel (Foeniculum vulgare), possesses a spectrum of therapeutic properties, including anti-arthritic, anti-inflammatory, antioxidant, and tumor-suppressive effects. However, its specific impact on RA remains underexplored. This study sought to uncover the potential therapeutic value of anethole in treating RA by employing an H2O2-induced inflammation model with HIG-82 synovial cells. Our results demonstrated that exposure to H2O2 induced the inflammation and apoptosis in these cells. Remarkably, anethole treatment effectively countered these inflammatory and apoptotic processes triggered by H2O2. Moreover, we identified the aquaporin 1 (AQP1) and protein kinase A (PKA) pathway as critical regulators of inflammation and apoptosis. H2O2 stimulation led to an increase in the AQP1 expression and a decrease in p-PKA-C, contributing to cartilage degradation. Conversely, anethole not only downregulated the AQP1 expression but also activated the PKA pathway, effectively suppressing cell inflammation and apoptosis. Furthermore, anethole also inhibited the enzymes responsible for cartilage degradation. In summary, our findings highlight the potential of anethole as a therapeutic agent for mitigating H2O2-induced inflammation and apoptosis in synovial cells, offering promising prospects for future RA treatments. © 2023 Wiley Periodicals LLC.

关键词： Cell death

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Complete mitochondrial genome of Spanish flag snapper,Lutjanus carponotatus(Perciformes: Lutjanidae)

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Mitochondrial DNA Part B 2019年第1期4卷 568-569页

作者： Gyungryul Kim Ji-Hyun Lee Md. Jobaidul Alam Soo Rin Lee Sapto Andriyono Fisheries Resource Research Division National Institute of Fisheries Science (NIFS) Busan Republic of Korea Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Republic of Korea Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Republic of KoreaDepartment of Marine Fisheries and Marine Faculty Universitas Airlangga Surabaya East Java Indonesia

The comple mitogenome of Spanish flag snapper,Lutjanus carponotatuswas determined by next generation sequencing (NGS) technique. The mitogenome ofL. carponotatus(16,514bp) habors 37 genes (22 tRNAs, 2 rRNAs, 13 polypeptides) and two non-coding regions, the origin of light strand replication (OL) and the putative control region (D-Loop). Among the 37 genes inL. carponotatusmitogenome, 28 were encoded on the H-strand, whereas only 9 were on the L-strand. Phylogenetic relationship showed that the full mitochondrial genome sequencesL. carponotatuswas most closely related toLutjanus russelliiwith 93% sequence identity clustering withLutjanus fulviflamma(92%) andLutjanus vitta(91%).

关键词： Next generation sequencing Lutjanus carponotatus mitogenome Spanish flag snapper

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Author Correction: Reconciliation of energy use disparities in brick production in India

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Nature Sustainability 2023年 1715页

作者： Kushal Tibrewal Chandra Venkataraman Harish Phuleria Anurag Gupta Pradnya Lokhande Veena Joshi Sameer Maithel Anand Damle Shahadev Rabha Binoy K. Saikia Sayantee Roy Gazala Habib Shubham Rathi Anubha Goel Sakshi Ahlawat Tuhin Kumar Mandal M. Azharuddin Hashmi Asif Qureshi Abisheg Dhandapani Jawed Iqbal Sandeep Devaliya Ramya Sunder Raman Yang Lian Govindan Pandithurai Sudheer Kumar Kuppili M. Shiva Nagendra Sauryadeep Mukherjee Abhijit Chatterjee Tanveer Ahmad Najar Arshid Jehangir Jitender Singh Baerbel Sinha Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Mumbai India Pune Maharashtra India Greentech Knowledge Solutions Pvt. Ltd. New Delhi India De Boer Damle (India) Pvt. Ltd. Pune Maharashtra India Coal and Energy Division CSIR-North East Institute of Science and Technology Jorhat India Department of Civil Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi India Department of Civil Engineering Indian Institute of Technology Kanpur Kanpur India Center on Global Change Environmental Sciences and Biomedical Metrology Division CSIR-National Physical Laboratory New Delhi India Department of Civil Engineering Indian Institute of Technology Hyderabad Hyderabad India Civil and Environmental Engineering Birla Institute of Technology Ranchi India Earth and Environmental Sciences Indian Institute of Science Education and Research Bhopal Bhopal India Indian Institute of Tropical Meteorology Pune Pune India Department of Civil Engineering Indian Institute of Technology Madras Chennai India Department of Environmental Sciences Bose Institute Kolkata India Department of Environmental Science University of Kashmir Srinagar Jammu and Kashmir India Department of Earth and Environmental Sciences Indian Institute of Science Education and Research Mohali Punjab India

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Bioelectrical Interfaces Beyond Cellular Excitability: Cancer, Aging, and Gene Expression Reprogramming

arXiv

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arXiv 2025年

作者： Cadinu, Paolo Burgess, Matthew Jones, Catarina Franco Luciani, Titouan Iarossi, Marzia Schröter, Manuel Nakatsuka, Nako Djamgoz, Mustafa B.A. Gonçalves, Gil Sanjuán-Alberte, Paola Mendes, Paula M. Rawson, Frankie J. Nair, Malavika Levin, Michael Moreddu, Rosalia Program in Cellular and Molecular Medicine Boston Children’s Hospital BostonMA02115 United States Department of Microbiology Blavatnik Institute Harvard Medical School BostonMA02115 United States Institute of Biomedical Engineering Department of Engineering Science University of Oxford Oxford United Kingdom Department of Bioengineering Institute for Bioengineering and Biosciences Instituto Superior Técnico University of Lisbon Lisbon Portugal Associate Laboratory i4HB Institute for Health and Bioeconomy Instituto Superior Técnico Universidade de Lisboa Lisbon Portugal Department of Neuroscience Institut Pasteur Paris75015 France Department of Biomedical Engineering Technion Israel Institute of Technology Haifa Israel ETH Zurich Department of Biosystems Science and Engineering Basel Switzerland Laboratory of Chemical Nanotechnology Neuro-X Institute EPFL Genève1202 Switzerland Department of Life Sciences Imperial College London United Kingdom Department of Mechanical Engineering University of Aveiro Aveiro3810-193 Portugal Guimarães4800-058 Portugal School of Chemical Engineering University of Birmingham Birmingham United Kingdom Bioelectronics Laboratory Division of Regenerative Medicine and Cellular Therapies School of Pharmacy Biodiscovery Institute University of Nottingham Nottingham United Kingdom Allen Discovery Centre Tufts University Tufts University MedfordMA United States Wyss Institute for Bioinspired Engineering Harvard University BostonMA United States School of Electronics and Computer Science University of Southampton Southampton United Kingdom Institute for Life Sciences University of Southampton Southampton United Kingdom

Bioelectrical interfaces represent a significant evolution in the intersection of nanotechnology and biophysics, oRering new strategies for probing and influencing cellular processes. These systems capitalize on the subtle but powerful electric fields within living matter, potentially enabling applications beyond cellular excitability, ranging from targeted cancer therapies to interventions in genetic mechanisms and aging. This perspective article envisions the translation, development and application of next-generation solid-state bioelectrical interfaces and their transformative impact across several critical areas of medical research. © 2025, CC BY.

关键词： Medical nanotechnology

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EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely-Metal Poor Galaxies

arXiv

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arXiv 2023年

作者： Xu, Yi Ouchi, Masami Isobe, Yuki Nakajima, Kimihiko Ozaki, Shinobu Bouché, Nicolas F. Wise, John H. Emsellem, Eric Kusakabe, Haruka Hattori, Takashi Nagao, Tohru Chiaki, Gen Fukushima, Hajime Harikane, Yuichi Hayashi, Kohei Hirai, Yutaka Kim, Ji Hoon Maseda, Michael V. Nagamine, Kentaro Shibuya, Takatoshi Sugahara, Yuma Yajima, Hidenobu Aoyama, Shohei Fujimoto, Seiji Fukushima, Keita Hatano, Shun Inoue, Akio K. Ishigaki, Tsuyoshi Kawasaki, Masahiro Kojima, Takashi Komiyama, Yutaka Koyama, Shuhei Koyama, Yusei Lee, Chien-Hsiu Matsumoto, Akinori Mawatari, Ken Moriya, Takashi J. Motohara, Kentaro Murai, Kai Nishigaki, Moka Onodera, Masato Ono, Yoshiaki Rauch, Michael Saito, Tomoki Sasaki, Rin Suzuki, Akihiro Takeuchi, Tsutomu T. Umeda, Hiroya Umemura, Masayuki Watanabe, Kuria Yabe, Kiyoto Zhang, Yechi Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan University of Tokyo Chiba Kashiwa277-8583 Japan Department of Physics Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Univ Lyon Univ Lyon1 ENS de Lyon CNRS Centre de Recherche Astrophysique de Lyon UMR5574 Saint-Genis-LavalF-69230 France Center for Relativistic Astrophysics School of Physics Georgia Institute of Technology AtlantaGA30332 United States European Southern Observatory Karl-Schwarzschild-Straße 2 Garching85748 Germany Observatoire de Genéve Université de Genéve 51 Ch. des Maillettes Versoix1290 Switzerland 650 North A’ohoku Place HiloHI96720 United States Research Center for Space and Cosmic Evolution Ehime University Bunkyo-cho 2-5 Ehime Matsuyama790-8577 Japan Center for Computational Sciences University of Tsukuba Ten-nodai 1-1-1 Tsukuba Ibaraki305-8577 Japan Department of Physics and Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom National Institute of Technology Ichinoseki College Hagisho Ichinoseki021-8511 Japan Astronomical Institute Tohoku University 6-3 Aoba Aramaki Aoba-ku Miyagi Sendai980-8578 Japan Department of Physics and Astronomy University of Notre Dame 225 Nieuwland Science Hall Notre DameIN46556 United States Astronomy Program Department of Physics and Astronomy Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of SNU Astronomy Research Center Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Department of Astronomy University of Wisconsin-Madison 475 N. Charter Street MadisonWI53706 United States Theoretical Astrophysics Department of Earth & Space S

We present demography of the dynamics and gas-mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of 0.015 − 0.195 Zo and low stellar masses of 104 − 108 Mo in the local universe. We conduct deep optical integral-field spectroscopy (IFS) for the low-mass EMPGs with the medium high resolution (R = 7500) grism of the 8m-Subaru FOCAS IFU instrument by the EMPRESS 3D survey, and investigate Hα emission of the EMPGs. Exploiting the resolution high enough for the low-mass galaxies, we derive gas dynamics with the Hα lines by the fitting of 3-dimensional disk models. We obtain an average maximum rotation velocity (vrot) of 15 ± 3 km s−1 and an average intrinsic velocity dispersion (σ0) of 27 ± 10 km s−1 for 15 spatially resolved EMPGs out of the 33 EMPGs, and find that all of the 15 EMPGs have vrot/σ0 rot/σ0 with the decreasing stellar mass and metallicity. We derive the gas mass fraction (fgas) for all of the 33 EMPGs, and find no clear dependence on stellar mass and metallicity. These vrot/σ0 and fgas trends should be compared with young high-z galaxies observed by the forthcoming JWST IFS programs to understand the physical origins of the EMPGs in the local universe. © 2023, CC BY.

关键词： Galaxies

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Quantitative Study on the Effect of Thermal Gradients on the Microstructure of Additively Manufactured Ti-6Al-4V Builds

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Microscopy and Microanalysis 2019年第S2期25卷 2598-2599页

作者： Meiyue Shao Chris Blackwell Sriram Vijayan Sabina Kumar Sudarsanam S. Babu Joerg R. Jinschek Department of Material Science and Engineering The Ohio State University Columbus OH USA. Department of Material Science and Engineering University of Tennessee Knoxville TN USA. Department of Mechanical Aerospace and Biomedical Engineering U Tennessee Knoxville TN USA. Advanced Manufacturing Program Energy and Environmental Sciences Division ORNL Knoxville TN USA.

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Isolated Electron Trap-Induced Charge Accumulation for Efficient Photocatalytic Hydrogen Production

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Angewandte Chemie 2023年第25期135卷

作者： Prof. Dr. Wenhuan Huang Chenyang Su Dr. Chen Zhu Dr. Tingting Bo Dr. Shouwei Zuo Prof. Wei Zhou Yuanfu Ren Prof. Yanan Zhang Prof. Jing Zhang Prof. Magnus Rueping Prof. Huabin Zhang Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical Engineering Shaanxi University of Science and Technology Xi'an 710021 P. R. China KAUST Catalysis Center (KCC) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Contribution: Conceptualization (lead) Department of Applied Physics Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology Faculty of Science Tianjin University Tianjin 300072 P. R. China Contribution: Conceptualization (supporting) Chemistry Program Physical Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China Contribution: Conceptualization (equal)

The solar-driven evolution of hydrogen from water using particulate photocatalysts is considered one of the most economical and promising protocols for achieving a stable supply of renewable energy. However, the efficiency of photocatalytic water splitting is far from satisfactory due to the sluggish electron-hole pair separation kinetics. Herein, isolated Mo atoms in a high oxidation state have been incorporated into the lattice of Cd 0.5 Zn 0.5 S (CZS@Mo) nanorods, which exhibit photocatalytic hydrogen evolution rate of 11.32 mmol g −1 h −1 (226.4 μmol h −1 ; catalyst dosage 20 mg). Experimental and theoretical simulation results imply that the highly oxidized Mo species lead to mobile-charge imbalances in CZS and induce the directional photogenerated electrons transfer, resulting in effectively inhibited electron-hole recombination and greatly enhanced photocatalytic efficiency.

关键词： Electron Pump High-Oxidation State Photocatalysis Single-Atom Catalysts Water Splitting

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Topochemical Synthesis of Ca3CrN3H Involving a Rotational Structural Transformation for Catalytic Ammonia Synthesis

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Angewandte Chemie 2022年第39期134卷

作者： Yu Cao Dr. Maria A. Kirsanova Prof. Masayuki Ochi Dr. Walid Al Maksoud Dr. Tong Zhu Dr. Rohit Rai Shenghan Gao Tatsuya Tsumori Dr. Shintaro Kobayashi Dr. Shogo Kawaguchi Dr. Edy Abou-Hamad Prof. Kazuhiko Kuroki Prof. Cédric Tassel Prof. Artem M. Abakumov Prof. Yoji Kobayashi Prof. Hiroshi Kageyama Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Nishikyo-ku Kyoto 615-8510 Japan Center for Energy Science and Technology Skolkovo Institute of Science and Technology Nobel str. 3 121205 Moscow Russia Department of Physics Osaka University Toyonaka Osaka 560-0043 Japan Chemical Science Program KAUST Catalysis Center Division of Physical Science and Engineering King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia Japan Synchrotron Radiation Research Institute Sayo-cho Hyogo 679-5198 Japan Imaging and Characterization Department Core Labs King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia

Topochemical reactions have led to great progress in the discovery of new metastable compounds with novel chemical and physical properties. With these reactions, the overall crystal structure of the host material is generally maintained. Here we report a topochemical synthesis of a hexagonal nitride hydride, h -Ca 3 CrN 3 H, by heating an orthorhombic nitride, o -Ca 3 CrN 3 , under hydrogen at 673 K, accompanied by a rotational structural transformation. The hydrogen intercalation modifies the Ca−N rock-salt-like atomic packing in o -Ca 3 CrN 3 to a face-sharing octahedral chain in h -Ca 3 CrN 3 H, mimicking a “hinged tessellation” movement. In addition, the h -Ca 3 CrN 3 H exhibited stable ammonia synthesis activity when used as a catalyst.

关键词： Ammonia Synthesis Catalysis Hydrides Mixed Anions Nitrides Topochemistry

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