Rchr
J-GLOBAL ID:200901056678285688   Update date: Oct. 30, 2024

Ohara Keishi

オハラ ケイシ | Ohara Keishi
Affiliation and department:
Job title: Professor
Homepage URL  (1): http://chem.sci.ehime-u.ac.jp/~struct1/
Research field  (4): Basic physical chemistry ,  Pharmaceuticals - analytical and physicochemistry ,  Food sciences ,  Functional solid-state chemistry
Research keywords  (19): Singlet Oxygen ,  Antioxidant ,  時間分解ESR ,  活性酸素 ,  薬剤反応性 ,  ミセル ,  近赤外発光 ,  反応速度 ,  Spin-dynamics ,  懸濁系 ,  化学反応 ,  スーパーオキシド ,  スピンプローブ ,  天然抗酸化剤 ,  ビタミンE ,  Free Radical ,  Photochemistry ,  EPR ,  時間分解分光
Research theme for competitive and other funds  (16):
  • 2018 - 2022 Development of multiple evaluation method for antioxidant activities based on time-resolved optical measurements in near-infrared region
  • 2014 - 2019 A new efficient method for antioxidant activity evaluation based on the time-resolved optical measurement in near-infrared region
  • 2015 - 2018 Development of Antioxidative Absorption Capacity Assay Method for Foods
  • 2010 - 2014 Antioxidant activity evaluation of trace sample by the spot measurement of singlet oxygen luminescence lifetime
  • 2011 - 2012 飲料・食品のための簡便・短時間で計測可能な抗酸化力評価法の開発
Show all
Papers (81):
  • Keishi Ohara, Takumi Watanabe, Haruki Ishi, Hideyuki Nakano, Tetsuo Okujima. Di(acenaphtho)BODIPYs as deep red fluorescence probes for reactive oxygen species. Dyes and Pigments. 2024. 227. 112192-112192 (8 pages)
  • Ryuhei Oka, Keishi Ohara, Naoya Tajima, Toshihiro Shimada, Toshio Naito. Nearly three-dimensional Dirac fermions in an organic crystalline material unveiled by electron spin resonance. Materials Advances. 2024. 5. 4. 1492-1501
  • Ryuhei Oka, Keishi Ohara, Kensuke Konishi, Ichiro Yamane, Toshihiro Shimada, Toshio Naito. Band Structure Evolution during Reversible Interconversion between Dirac and Standard Fermions in Organic Charge-Transfer Salts. Magnetochemistry. 2023. 9. 6. 153-153
  • Tetsuo Okujima, Yuki Ueda, Manami Inoue, Shigeki Mori, Keishi Ohara, Masayoshi Takase, Hidemitsu Uno, Toshio Naito. Synthesis of bicyclo[2.2.2]octadiene-fused 5,15-diazaporphyrin and 10-azacorrole with meso-imine bridges. Journal of Porphyrins and Phthalocyanines. 2023. 27. 01n04. 402-407
  • Shin-ichi Nagaoka, Nanaho Nomoto, Tomohiko Tasaka, Umpei Nagashima, Takatoshi Matsumoto, Keishi Ohara. Solvent effect on activities of aryloxyl-radical scavenging and singlet-oxygen quenching reactions by vitamin E: Addition of water to ethanol solution. International Journal of Chemical Kinetics. 2022. 54. 10. 570-576
more...
MISC (127):
  • 渡部匠海, 小原敬士. 近赤外発光測定を用いた野菜の一重項酸素消去能の評価法. 日本食品化学学会第26回総会・学術大会講演要旨集. 2020. 19-19
  • 野本七帆, 井上和優, 小原敬士, 長岡伸一. エタノール中のトコフェロール類の一重項酸素消去速度に対する水の添加の効果. 第31回ビタミンE研究会プログラム・アブストラクト. 2020. 35-35
  • 増田有作, 奥島鉄雄, 小原敬士. 活性酸素を検出する新規蛍光プローブの合成. 日本化学会中国四国支部2018年支部大会講演要旨集. 2018. 77-77
  • 小原 敬士. 近赤外発光スポット検出によるゲル中での一重項酸素消去活性計測. C & I commun : colloid & interface communication : newsletter from DCSC. 2017. 42. 2. 28-30
  • 髙橋 亮治, 小原 敬士, 松浦 真也. Analyzing the Outcomes of Educational Development in the Faculty of Science by Student Survey. 大学教育実践ジャーナル = Journal of faculty and staff development in higher education. 2017. 15. 141-146
more...
Books (5):
  • ビタミンE研究の進歩XIII
    ビタミンE研究会 2009
  • Kinetic Study of Vitamin E Regeneration Reaction with Catechins (EC, EGC, ECG, and EGCG) in Homogeneous and Micellar Solution
    2004
  • ビタミンE研究の進歩X
    ビタミンE研究会 2002
  • ビタミンE研究の進歩IX
    ビタミンE研究会 2000
  • CIDEP studies of photochemical reactions at different microwave frequencies, ST0M and ST-M.
    Springer-Verlag, Singapore 1998
Lectures and oral presentations  (8):
  • 近赤外発光寿命測定による青果物の一重項酸素消去能の評価
    (2024年日本化学会中国四国支部大会 2024)
  • O-キレートπ拡張BOPHYの合成と物性
    (2023ハロゲン利用ミニシンポジウム 2023)
  • 5,15-ジアザポルフィリン銅(II)錯体およびイミン架橋型10-アザコロール銅(I)錯体の合成
    (2023年 日本化学会中国四国支部大会 山口大会 2023)
  • ディラック電子と通常の電子が共存した 有機伝導体の電子スピン共鳴
    (日本化学会 第103春期年会 2023)
  • 活性酸素検出能を付加した Di(acenaphtho)BODIPYの開発
    (日本化学会中国四国支部大会2022 2022)
more...
Works (1):
  • 生物・分子機能性化学における近赤外発光の新展開
    2004 -
Education (3):
  • 1993 - 1996 Kyoto University Graduate School of Science Department of Chemistry
  • 1987 - 1989 Osaka University Graduate School of Science Inorganic and Physical Chemistry
  • 1983 - 1987 Osaka University Faculty of Science Department of Chemistry
Professional career (1):
  • Doctor of Science (Kyoto University)
Work history (5):
  • 2015/05 - 現在 Ehime University Graduate School of Science and Engineering Professor
  • 2007/04 - 2015/04 Ehime University Graduate School of Science and Engineering Associate Professor
  • 2006/04 - 2007/03 Ehime University Graduate School of Science and Engineering Senior Assistant Professor
  • 1996/04 - 2006/03 Ehime University Faculty of Science Assistant Professor
  • 1996/01 - 1996/04 Kyoto University Graduate School of Science Researcher (JSPS Research Fellowships for Young Scientists)
Committee career (5):
  • 2004/04 - 現在 日本分光学会 代議員(中国四国支部)
  • 2004/04 - 現在 The Spectroscopical Society of Japan Organizer of Ehime Block
  • 2023/10 - 2024/11 The Chemical Society of Japan -
  • 2021/03 - 2023/02 The Chemical Society of Japan -
  • 2014/05 - 2016/02 日本化学会中国四国支部 愛媛地区幹事
Association Membership(s) (7):
The Japanese Society For Food Science And Technology ,  Japanese Society of Food Chemistry ,  光化学協会 ,  THE SOCIETY OF ELECTRON SPIN SCIENCE AND TECHNOLOGY ,  THE SPECTROSCOPICAL SOCIETY OF JAPAN ,  THE CHEMICAL SOCIETY OF JAPAN ,  SOCIETY FOR FREE RADICAL RESEARCH JAPAN
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