照射緑茶の電子スピン共鳴法による検知 Detection method of irradiated green tea using ESR

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With electron spin resonance (ESR) spectroscopy, we revealed various radicals in commercially available Japanese green tea before and after γ-irradiation. The representative ESR spectrum of green tea is composed of sextet centered at g=2.0, a singlet at the same g value and a singlet at g=4.0. The first signal is attributable to a signal with hyperfine interaction of the Mn<SUB>2+</SUB>. The second signal is due to an organic free radical. The third signal may originate from the Fe<SUB>3+</SUB>. Upon irradiation, a pair of signals was newly appeared at the symmetric positions on both sides of the organic free radical signal. According to the theory of radical production in irradiated solid, a linear relationship is expected between the radiation dose and the radical yield. We determined the unreported irradiation dose by the linear extrapolation.

収録刊行物

  • 食品照射 = Food irradiation, Japan  

    食品照射 = Food irradiation, Japan 41(1), 14-17, 2006-09-30 

    日本食品照射研究協議会

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各種コード

  • NII論文ID(NAID)
    10018358065
  • NII書誌ID(NCID)
    AN00117832
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03871975
  • NDL 記事登録ID
    8558780
  • NDL 雑誌分類
    ZP34(科学技術--食品工学・工業)
  • NDL 請求記号
    Z17-640
  • データ提供元
    CJP書誌  NDL  IR  J-STAGE 
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