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Basic Chemical Research on Active Oxygen in Fine Bubbles for Food Science

Research Project

Project/Area Number 19K05507
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 34010:Inorganic/coordination chemistry-related
Research InstitutionUniversity of Nagasaki

Principal Investigator

Kurahashi Takuya  長崎県立大学, 看護栄養学部, 教授 (90353432)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsファインバブル / 酸素ガス / オゾン / シフ塩基 / 光化学特性 / アルコール酸化 / 酸化 / 空気酸化 / 活性酸素 / 高圧反応 / 酸素酸化 / 酸化反応 / 食品抽出
Outline of Research at the Start

ファインバブルは、ミクロレベル以下のサイズを持つ気泡であるが、通常サイズの気泡にはない特徴的な特性を示す。本研究では、ファインバブルの界面活性化効果に着目して、水とは全く混和しない有機溶媒を気泡に内包させて微小液滴として水溶液に広く分散させる。この気体ー有機溶媒ー水からなる3相溶液に対して、最大で水深1万メートルに匹敵する圧力をかける。気体と液体の圧縮率には大きな違いがあることから、ファイバブルにより形成される気液界面には非常に大きな力学的なエネルギーが印加されると予想される。本研究では、この力学的エネルギーを効率的に化学エネルギーに変換して、従来不可能だった化学変換の実現を目指す。

Outline of Final Research Achievements

According to the previous spectroscopic study, an oxygen fine bubble solution contains highly reactive hydroxyl radical. In this study we investigated oxidation reactions in oxygen fine bubble solution. The 2-butanol substrate, which is expected to react with hydroxyl radical, is utilized. 2-Butanol is decreased in oxygen fine bubble solution, but no oxidized product is observed. Then, the decrease of 2-butanol is ascribed to vaporization through gas-liquid interface of fine bubbles. We also investigated the reactivity of ozone fine bubbles and the possibility of visible-light irradiation to enhance the reactivity of oxygen fine bubbles.

Academic Significance and Societal Importance of the Research Achievements

酸素ガスファインバブルの溶液にヒドロキシルラジカル種が分光的に観測されたとの報告例から酸化反応の可能性を検証した。実験結果はネガティブであったが、確実な実験結果を持って立証できたと考えている。酸素ガスの代わりにオゾンガスを用いた比較実験を行ったが、良好な反応性が確認されて今後の発展が期待される。一方、酸素ガスファインバブルに光照射を行うことを目的に、簡便に生成させることのできる有機分子の光化学特性の検討も行った。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Electrochemical Epoxidation Catalyzed by Manganese Salen Complex and Carbonate with Boron-Doped Diamond Electrode2023

    • Author(s)
      Roy Pijush Kanti、Amanai Keisuke、Shimizu Ryosuke、Kodera Masahito、Kurahashi Takuya、Kitayama Kenji、Hitomi Yutaka
    • Journal Title

      Molecules

      Volume: 28 Issue: 4 Pages: 1797-1797

    • DOI

      10.3390/molecules28041797

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Variation of the Emission Efficiency and Wavelength from Fluorescent Zinc Salen Complexes upon Systematic Structural Modifications2022

    • Author(s)
      Kurahashi Takuya
    • Journal Title

      ACS Omega

      Volume: 7 Issue: 34 Pages: 30642-30654

    • DOI

      10.1021/acsomega.2c04714

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Reactivity and Selectivity of Agueous Ozone in the Reactions with Alcohols2022

    • Author(s)
      Takuya Kurahashi and Yuka Nakano
    • Organizer
      10th Asian Biological Inorganic Chemistry Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] オゾンファインバブルを用いるアルコール類の無触媒酸化2022

    • Author(s)
      倉橋拓也、中尾友香
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Oxidation Reactions under Organic/Aqueous Biphasic Conditions with Bubbles2020

    • Author(s)
      Takuya Kurahashi
    • Organizer
      分子研コロキウム
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Dioxygen Activation by Mn(III) Complexes under Organic/Aqueous Biphasic Conditions2020

    • Author(s)
      Takuya Kurahashi
    • Organizer
      TUM Catalysis Research Center-Japan Science and Technology Agency Joint Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mechanistic Studies on Dioxygen Activation by a Manganese(III) Complex in Alkaline Solution2019

    • Author(s)
      Takuya Kurahashi
    • Organizer
      15th International Symposium on Applied Bioinorganic Chemistry
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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