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Simultaneous removal of dissolved organic matter and bromide from drinking water source by anion exchange resins for controlling disinfection by-products

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Journal of Environmental Sciences 2014年第6期26卷 1294-1300页

作者： Athit Phetrak Jenyuk Lohwacharin Hiroshi Sakai Michio Murakami Kumiko Oguma Satoshi Takizawa Department of Urban Engineering Graduate School of Engineering The University of Tokyo Institute of Industrial Science The University of Tokyo

Anion exchange resins （AERs） with different properties were evaluated for their ability to remove dissolved organic matter （DOM） and bromide, and to reduce disinfection by-product （DBP） formation potentials of water collected from a eutrophic surface water source in Japan. DOM and bromide were simultaneously removed by all selected AERs in batch adsorption experiments. A polyacrylic magnetic ion exchange resin （MIEX） showed faster dissolved organic carbon （DOC） removal than other AERs because it had the smallest resin bead size. Aromatic DOM fractions with molecular weight larger than 1600 Da and fluorescent organic fractions of fulvic acid- and humic acid-like compounds were efficiently removed by all AERs. Polystyrene AERs were more effective in bromide removal than polyacrylic AERs. This result implied that the properties of AERs, i.e. material and resin size, influenced not only DOM removal but also bromide removal efficiency, MIEX showed significant chlorinated DBP removal because it had the highest DOC removal within 30 rain, whereas polystyrene AERs efficiently removed brominated DBPs, especially brominated trihalomethane species. The results suggested that, depending on source water DOM and bromide concentration, selecting a suitable AER is a key factor in effective control of chlorinated and brominated DBPs in drinking water.

关键词： adsorption dissolved organic carbon drinking water treatment ion exchange

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High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time mapping

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Photonics Research 2016年第1期4卷 13-16页

作者： Takashi Ito Ondrej Slezak Masahiro Yoshita Hidefumi Akiyama Yohei Kobayashi Institue for Solid State Physics University of Tokyo HiLASE Centre Institute of Physics ASCR

The group-delay dispersion of an optical fiber was measured with the time-of-flight method, using fingerprint-like characteristic spectra from a mode-locked fiber laser source. To determine the group-delay dispersion up to the fourth order, least-squares fitting was applied to the overall time waveform mapped on the time axis for the fingerprint-spectral broadband pulses through a long optical fiber. The analysis of all 4003 data points reduced statistical uncertainty, and provided second-, third-, and fourth-order dispersion with uncertainties of 0.02%, 0.4%, and 4%,respectively.

关键词： length time High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time mapping

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Ultra-long-working-distance spectroscopy of single nanostructures with aspherical solid immersion microlenses

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Light(Science & Applications) 2020年第1期9卷 1561-1571页

作者： Aleksander Bogucki Lukasz Zinkiewicz Magdalena Grzeszczyk Wojciech Pacuski Karol Nogajewski Tomasz Kazimierczuk Aleksander Rodek Jan Suffczynski Kenji Watanabe Takashi Taniguchi Piotr Wasylczyk Marek Potemski Piotr Kossacki Faculty of Physics University of Warsawul.Pasteura 502-093 WarsawPoland National Institute for Materials Science TsukubaIbaraki 305-0044Japan Laboratoire National des Champs Magnetiques Intenses CNRS-UJF-UPS-INSAavenue des Martyrs 2538042 GrenobleFrance

In light science and applications,equally important roles are played by efficient light emitters/detectors and by the optical elements responsible for light extraction and *** latter should be simple,cost effective,broadband,versatile and compatible with other components of widely desired micro-optical ***,they should also operate without high-numerical-aperture ***,we demonstrate that all these requirements can be met with elliptical microlenses 3D printed on top of light ***,the microlenses we propose readily form the collected light into an ultra-low divergence beam(half-angle divergence below 1°)perfectly suited for ultra-longworking-distance optical measurements(600mm with a 1-inch collection lens),which are not accessible to date with other spectroscopic *** microlenses can be fabricated on a wide variety of samples,including semiconductor quantum dots and fragile van der Waals heterostructures made of novel two-dimensional materials,such as monolayer and few-layer transition metal dichalcogenides.

关键词： versatile latter optics

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Low temperature surface oxygen activation in crystalline MnO_(2) triggered by lattice confined Pd single atoms

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Journal of Energy Chemistry 2021年第11期30卷 136-144,I0003页

作者： Xuemei Liao Yonghui Zhao Changwen Liu Xiaopeng Li Yu Sund Kenichi Kato Miho Yamauchi Zheng Jiang College of Food and Biological Engineering Xihua UniversityChengdu 610039SichuanChina CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)No.100Haike RoadPudong New DistrictShanghai 201210China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityNo.2999 North Renmin RoadSongjiang DistrictShanghai 201620China Institute for the Advancement of Higher Education Hokkaido UniversitySapporo 060-0817Japan Department of Chemistry Faculty of ScienceHokkaido UniversityN10W8Kita-kuSapporoHokkaido 060-0810Japan RIKEN SPring-8 Center1-1-1 KoutoSayo-choSayo-gunHyogo 679-5148Japan International Institute for Carbon-Neutral Energy Research(WPI-I2CNER) Kyushu UniversityMotooka 744Nishi-kuFukuoka 819-0395Japan Advanced Institute for Materials Research(AIMR) Tohoku University2-1-1 KatahiraAoba-kuSendai 980-8577Japan Shanghai Synchrotron Radiation Facility Zhangjiang LabShanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)No.239 Zhangheng RoadPudong New DistrictShanghai 201203China Shanghai Institute of Applied Physics Chinese Academy of ScienceNo.2019 Jia Luo RoadJiading DistrictShanghai 201800China

Tuning the coordination environment is the research axis of single atom catalysts (SACs). SACs are commonly stabilized by various defects from support. Here, we report a lattice confined Pd SAC using MnO_(2) as support. Compared with the Pd clusters anchored on the surface, the lattice confined Pd single atoms allows spontaneous exaction of surrounding lattice oxygen at room temperature when employed in CO oxidation. The MnO_(2) supported Pd SAC exhibited a high turnover frequency of 0.203 s^(−1) at low reaction temperature, which is higher than that of recently reported Pd SACs. Theoretical calculations also confirmed the confined monatomic Pd activate lattice oxygen with an ultralow energy barrier. Our results illustrate that the unique coordination environment of single atom provided by lattice confinement is promising to boost the activity of SACs.

关键词： Single atom catalysts(SACs) Lattice confinement Oxygen activation Manganese oxide nanofiber

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Global Wheat Head Detection(GWHD)Dataset:A Large and Diverse Dataset of High-Resolution RGB-Labelled Images to Develop and Benchmark Wheat Head Detection Methods

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Plant Phenomics 2020年第1期2卷 243-254页

作者： Etienne David Simon Madec Pouria Sadeghi-Tehran Helge Aasen Bangyou Zheng Shouyang Liu Norbert Kirchgessner Goro Ishikawa Koichi Nagasawa Minhajul A.Badhon Curtis Pozniak Benoit de Solan Andreas Hund Scott C.Chapman Frédéric Baret Ian Stavness Wei Guo Arvalis Institut du végétal3 Rue Joseph et Marie Hackin75116 ParisFrance UMR1114 EMMAH INRAECentre PACABâtiment ClimatDomaine Saint-Paul228 Route de l’AérodromeCS 4050984914 Avignon CedexFrance Plant Sciences Department Rothamsted ResearchHarpendenUK Institute of Agricultural Sciences ETH ZurichUniversitätstrasse 28092 ZurichSwitzerland CSIRO Agriculture and Food Queensland Biosciences Precinct306 Carmody RoadSt Lucia4067 QLDAustralia Plant Phenomics Research Center Nanjing Agricultural UniversityNanjingChina Institute of Crop Science National Agriculture and Food Research OrganizationJapan Hokkaido Agricultural Research Center National Agriculture and Food Research OrganizationJapan Department of Computer Science University of SaskatchewanCanada Department of Plant Sciences University of SaskatchewanCanada School of Food and Agricultural Sciences The University of QueenslandGatton4343 QLDAustralia Graduate School of Agricultural and Life Sciences The University of Tokyo1-1-1 Midori-choNishitokyo CityTokyoJapan

The detection of wheat heads in plant images is an important task for estimating pertinent wheat traits including head population density and head characteristics such as health,size,maturity stage,and the presence of *** studies have developed methods for wheat head detection from high-resolution RGB imagery based on machine learning ***,these methods have generally been calibrated and validated on limited *** variability in observational conditions,genotypic differences,development stages,and head orientation makes wheat head detection a challenge for computer ***,possible blurring due to motion or wind and overlap between heads for dense populations make this task even more *** a joint international collaborative effort,we have built a large,diverse,and well-labelled dataset of wheat images,called the Global Wheat Head Detection(GWHD)*** contains 4700 high-resolution RGB images and 190000 labelled wheat heads collected from several countries around the world at different growth stages with a wide range of *** for image acquisition,associating minimum metadata to respect FAIR principles,and consistent head labelling methods are proposed when developing new head detection *** GWHD dataset is publicly available at http://***/and aimed at developing and benchmarking methods for wheat head detection.

关键词： Wheat wheat maturity

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Bimeron clusters in chiral antiferromagnets

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npj Computational Materials 2020年第1期6卷 270-278页

作者： Xiaoguang Li Laichuan Shen Yuhao Bai Junlin Wang Xichao Zhang Jing Xia Motohiko Ezawa Oleg A.Tretiakov Xiaohong Xu Michal Mruczkiewicz Maciej Krawczyk Yongbing Xu Richard F.L.Evans Roy W.C.hantrell Yan Zhou School of Science and Engineering The Chinese University of Hong Kong518172 ShenzhenChina Hefei National Laboratory for Physical Sciences at the Microscale Department of PhysicsUniversity of Science and Technology of China230026 HefeiChina Research Institute of Materials Science of Shanxi Normal University&Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology 041004 LinfenChina School of Physics and Electronic Information Shanxi Normal University041004 LinfenChina Department of Physics University of YorkYork YO105DDUK York-Nanjing International Center of Spintronics(YNICS) Nanjing University210093 NanjingChina Department of Applied Physics The University of Tokyo7-3-1 HongoTokyo 113-8656Japan School of Physics The University of New South WalesSydney 2052Australia National University of Science and Technology‘MISiS’ Moscow 119049Russia School of Chemistry and Materials Science of Shanxi Normal University&Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education 041004 LinfenChina Institute of Electrical Engineering Slovak Academy of SciencesDúbravskácesta 984104 BratislavaSlovakia Centre for Advanced Materials Application CEMEA Slovak Academy of SciencesDúbravskácesta 5807/984511 BratislavaSlovakia Faculty of Physics Adam Mickiewicz University in PoznanUniwersytetu Poznanskiego 261-614 PoznanPoland

A magnetic bimeron is an in-plane topological counterpart of a magnetic *** the topological equivalence,their statics and dynamics could be distinct,making them attractive from the perspectives of both physics and spintronic *** this work,we demonstrate the stabilization of bimeron solitons and clusters in the antiferromagnetic(AFM)thin film with interfacial Dzyaloshinskii–Moriya interaction(DMI).Bimerons demonstrate high current-driven mobility as generic AFM solitons,while featuring anisotropic and relativistic dynamics excited by currents with in-plane and out-ofplane polarizations,***,these spin textures can absorb other bimeron solitons or clusters along the translational direction to acquire a wide range of Néel topological *** clustering involves the rearrangement of topological structures,and gives rise to remarkable changes in static and dynamical *** merits of AFM bimeron clusters reveal a potential path to unify multibit data creation,transmission,storage,and even topology-based computation within the same material system,and may stimulate spintronic devices enabling innovative paradigms of data manipulations.

关键词： properties topological clusters

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