한국식품영양과학회지 (Journal of the Korean Society of Food Science and Nutrition)

  • 제41권11호
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  • Pages.1559-1564
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  • 2012
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  • 1226-3311(pISSN)
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  • 2288-5978(eISSN)
한국식품영양과학회 (The Korean Society of Food Science and Nutrition)
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감마선 조사 건조과일의 품질평가 및 물리적 판별

Quality Evaluation and Physical Identification of Irradiated Dried Fruits

  • Jung, Jae-Hoon (Dept. of Food Science and Technology, Kyungpook National University) ;
  • Jung, Yoonmi (Dept. of Food Science and Technology, Kyungpook National University) ;
  • Jo, Deokjo (Dept. of Food Science and Technology, Kyungpook National University) ;
  • Kwon, Joong-Ho (Dept. of Food Science and Technology, Kyungpook National University)
  • 투고 : 2012.07.09
  • 심사 : 2012.08.31
  • 발행 : 2012.11.30
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초록

건포도(Thailand산), 건망고(Philippine산), 건무화과(Iran산)를 0~5 kGy로 감마선 조사한 후 총균수 및 기계적 색차를 측정하고 조사여부 판별가능성을 확인하였다. 총 균수 측정 결과 3 kGy 이상으로 조사된 시료에서는 대부분 검출할 수 없는 수준으로 나타나 미생물학적으로 안전함을 알 수 있었다. 건조과일의 색차 측정에서, 건망고의 색 변화가 방사선조사에 가장 민감하였다. PSL 측정 결과, 건포도의 경우 비 조사시료는 음성으로, 조사시료는 중간 값으로 확인되었고 건망고의 경우 모든 시료가 음성으로 확인되었으며, 무화과의 경우 5 kGy 조사시료만이 양성으로 확인되어, 건조과일의 경우 PSL 측정법은 screening 방법으로의 적용가능성이 낮았다. TL 측정 결과 건무화과의 경우 조사시료는 $150{\sim}200^{\circ}C$ 사이에서 특유의 발광곡선을 나타내었고, 신호 강도 또한 조사선량에 의존적으로 증가하여 TL 적용이 가능하였다. ESR 측정 결과 건포도와 건망고의 경우 조사시료에서 multi-component 신호를 보여주었고, 신호 강도 역시 조사선량에 따라 유의적으로 증가하여 ESR 적용이 가능하였다.

Raisins (Thailand), dried mangos (Philippines), and dried figs (Iran) were gamma-irradiated (0~5 kGy), and their quality and detection characteristics were investigated. Microbiological characteristics were at safe levels when samples were irradiated at higher than 3 kGy. In color change after irradiation, dried mangoes were the most sensitive. Photostimulated luminescence (PSL) measurement was not applicable to dried fruits, showing negative or intermediate values for the irradiated samples. Thermoluminescence (TL) measurement was good for dried figs, exhibiting a glow curve in range of $150{\sim}200^{\circ}C$, where the signal intensity was dependent on the irradiation dose. Electron spin resonance (ESR) measurement was suitable for raisins and dried mangos, resulting in dose-dependent radiation-induced sugar radical signals.

키워드

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