Fumie Kabashima
A5047062135- Astro and Planetary Science
- Analytical Chemistry and Chromatography
- Mass Spectrometry Techniques and Applications
- Isotope Analysis in Ecology
- Spectroscopy and Chemometric Analyses
- Metabolomics and Mass Spectrometry Studies
- Inorganic and Organometallic Chemistry
- Analytical Methods in Pharmaceuticals
- Meat and Animal Product Quality
- Advanced Chemical Sensor Technologies
- History and advancements in chemistry
- Lignin and Wood Chemistry
- Food Quality and Safety Studies
- Thermochemical Biomass Conversion Processes
- Toxic Organic Pollutants Impact
- Fermentation and Sensory Analysis
- Chromatography in Natural Products
- Astrophysics and Star Formation Studies
- Space Exploration and Technology
Leco Corporation (United States)
2024
Samples from the carbonaceous asteroid (162173) Ryugu provide information on chemical evolution of organic molecules in early solar system. Here we show element partitioning major component ions by sequential extractions salts, carbonates, and phyllosilicate-bearing fractions to reveal primordial brine composition primitive asteroid. Sodium is dominant electrolyte salt fraction extract. Anions NH4+ are more abundant than carbonate phyllosilicate fractions, with molar concentrations order...
Polycyclic aromatic hydrocarbons (PAHs) contain ≲20% of the carbon in interstellar medium. They are potentially produced circumstellar environments (at temperatures ≳1000 kelvin), by reactions within cold (~10 kelvin) clouds, or processing carbon-rich dust grains. We report isotopic properties PAHs extracted from samples asteroid Ryugu and meteorite Murchison. The doubly-13C substituted compositions (Δ2×13C values) naphthalene, fluoranthene, pyrene 9 to 51‰ higher than values expected for a...
Abstract We report primordial aqueous alteration signatures in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu by Hayabusa2 spacecraft of JAXA. Newly identified low-molecular-weight hydroxy acids (HO-R-COOH) and dicarboxylic (HOOC-R-COOH), such as glycolic acid, lactic glyceric oxalic succinic are predominant samples two touchdown locations at Ryugu. The quantitative qualitative profiles for hydrophilic between sampling shows similar trends within order ppb...
The chirality of amino acids in extraterrestrial materials may provide an insight into the origin essential l-enantiopure terrestrial biosphere. In 2020, Hayabusa2 mission succeeded bringing back surface from C-type asteroid (162173) Ryugu to Earth. Amino were one targeted organic molecules be studied samples. To analyze various structural isomers acids, which expected present, limited amount returned samples, development a highly-sensitive and selective analytical method was necessary....
私達の身の回りには40万種の化学物質からなる「におい」が存在しており,人の敏感な嗅覚は極微量であってもにおいの元となる成分を感知することが可能である.またにおい物質は,単独で嗅いだ場合と複合で嗅いだ場合では相互作用や相殺作用により,その質や強度が大きく変化するため,においの質の評価は機器分析では容易ではなく官能評価による判定が主流となっている.筆者らは,におい分析における包括的かつ詳細な機器分析手法として高感度フルスペクトル取得が可能なGC-TOFMSを用いた生活に関わるさまざまなにおいの網羅的解析手法について検討を行った.