Search Results - "Hashiguchi, Minako"
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High‐mass resolution molecular imaging of organic compounds on the surface of Murchison meteorite
Published in Meteoritics & planetary science (01-02-2019)“…High‐resolution mass spectrometry (HRMS) imaging by desorption electrospray ionization (DESI) coupled with Orbitrap MS using methanol (MeOH) spray was…”
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Distinct distribution of soluble N-heterocyclic compounds between CM and CR chondrites
Published in GEOCHEMICAL JOURNAL (2019)“…Very complex mixtures of organic compounds occur in extraterrestrial materials such as carbonaceous meteorites. These intricate signatures of meteoritic…”
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Soluble Sulfur-Bearing Organic Compounds in Carbonaceous Meteorites: Implications for Chemical Evolution in Primitive Asteroids
Published in ACS earth and space chemistry (19-01-2023)“…Sulfur comprises various compound forms in natural environments and could have played important roles in chemical evolution in the universe. Various soluble…”
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New constraints on upper mantle creep mechanism inferred from silicon grain-boundary diffusion rates
Published in Earth and planetary science letters (01-01-2016)“…The creep in the Earth's interior is dominated either by diffusion creep which causes Newtonian mantle flow, or by dislocation creep which results in…”
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Mg lattice diffusion in iron-free olivine and implications to conductivity anomaly in the oceanic asthenosphere
Published in Earth and planetary science letters (15-02-2018)“…Mg lattice diffusion coefficients in iron-free olivine aggregates were measured as a function of pressure from 1 to 13 GPa, temperature from 1100 to 1300 K,…”
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In situ observation of D-rich carbonaceous globules embedded in NWA 801 CR2 chondrite
Published in Geochimica et cosmochimica acta (01-12-2013)“…Eighty-five D-rich carbonaceous particles were identified in the matrix of the NWA 801 CR2 chondrite using isotope microscopy. The occurrence of 67 D-rich…”
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New Applications of High-Resolution Analytical Methods to Study Trace Organic Compounds in Extraterrestrial Materials
Published in Life (Basel, Switzerland) (26-07-2019)“…Organic compounds are present as complex mixtures in extraterrestrial materials including meteorites, which may have played important roles in the origin of…”
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Hydrogen diffusion in the apatite-water system: Fluorapatite parallel to the c-axis
Published in GEOCHEMICAL JOURNAL (01-01-2017)“…Many studies in the past decade have sought to explore the origin and evolution of water in planetary bodies based on the hydrogen isotopic compositions of…”
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Microscopic and Isotope Tracer Study on the Growth of Spherical ZnO Particles in Water–Ethylene Glycol Solvent
Published in Crystal growth & design (03-06-2015)“…ZnO spherical powder with hierarchical structure was synthesized from zinc acetate anhydride and hexamethylenetetramine in a solvent of water and ethylene…”
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Hydrogen in tin dioxide films and bulk ceramics: An attempt to identify the most hidden impurity
Published in Applied physics letters (27-01-2014)“…Hydrogen impurities in SnO2 films and bulk ceramics were investigated in terms of mass transport and electron transport. The hydrogen concentration (n[H]) in…”
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Deuterium- and 15N-signatures of organic globules in Murchison and Northwest Africa 801 meteorites
Published in GEOCHEMICAL JOURNAL (30-07-2015)“…Carbonaceous matter from the matrix of the Murchison (CM2) meteorite and Northwest Africa (NWA) 801 (CR2) meteorite that were extremely rich in deuterium (D)…”
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In situ organic compound analysis on a meteorite surface by desorption electrospray ionization coupled with an Orbitrap mass spectrometer
Published in Rapid communications in mass spectrometry (30-06-2018)“…Rationale Since extraterrestrial organic matter in meteorites is a very complex mixture that is hard to ionize due to its association with minerals, in situ…”
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Hydrogen infiltration into BaTiO3-based dielectrics for multi-layer ceramic capacitors under highly accelerated temperature and humidity stress test
Published in Japanese Journal of Applied Physics (01-11-2021)“…To make electrical devices, such as smartphones and automotive devices, more functional, the mechanism of electrical reliability in multi-layer ceramic…”
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Analysis of Monocarboxylic Acids in the Murchison Meteorite by Sequential Extraction
Published in ACS earth and space chemistry (18-07-2024)“…Monocarboxylic acids (MCAs) in meteorites have significant potential to provide insight into the evolution of organic matter in the solar system considering…”
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Formation of an ultracarbonaceous Antarctic micrometeorite through minimal aqueous alteration in a small porous icy body
Published in Geochimica et cosmochimica acta (01-10-2017)“…A comprehensive study of the organic chemistry and mineralogy of an ultracarbonaceous micrometeorite (UCAMM D05IB80) collected from near the Dome Fuji Station,…”
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Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu
Published in Nature communications (18-09-2023)“…Samples from the carbonaceous asteroid (162173) Ryugu provide information on the chemical evolution of organic molecules in the early solar system. Here we…”
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Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium
Published in Science (American Association for the Advancement of Science) (22-12-2023)“…Polycyclic aromatic hydrocarbons (PAHs) contain ≲20% of the carbon in the interstellar medium. They are potentially produced in circumstellar environments (at…”
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Microscale hydrogen, carbon, and nitrogen isotopic diversity of organic matter in asteroid Ryugu
Published in Earth and planetary science letters (01-07-2024)“…•A lot of organic matter in asteroid Ryugu is in mostly round sub-micrometer particles.•Most individual sub-micron grains have similar H, N, and c…”
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Soluble Organic Matter Molecular Atlas of Ryugu Reveals Cold Hydrothermalism on C-Type Asteroid Parent Body
Published in Nature communications (16-10-2023)“…The sample from the near-Earth carbonaceous asteroid (162173) Ryugu is analyzed in the context of carbonaceous meteorites soluble organic matter. The analysis…”
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