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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Physicochemical Changes of Electron Beam-Irradiated Korean Kiwifruits at Low Dose Levels

저선량 전자선 조사된 국내산 참다래의 이화학적 품질변화

  • Kim, Kyoung-Hee (Dept. of Food and Nutrition, Chungnam National University) ;
  • Kwon, Jong-Sook (Dept. of Food and Nutrition, Chungnam National University) ;
  • Lee, Jeong-Ok (Dept. of Food and Nutrition, Chungnam National University) ;
  • Lee, Byung-Cheol (Quantum Optics Division, Korea Atomic Energy Research Institute) ;
  • Park, Seong-Hee (Quantum Optics Division, Korea Atomic Energy Research Institute) ;
  • Yook, Hong-Sun (Dept. of Food and Nutrition, Chungnam National University)
  • 김경희 (충남대학교 식품영양학과) ;
  • 권종숙 (충남대학교 식품영양학과) ;
  • 이정옥 (충남대학교 식품영양학과) ;
  • 이병철 (한국원자력연구원 양자광학기술개발센터) ;
  • 박성희 (한국원자력연구원 양자광학기술개발센터) ;
  • 육홍선 (충남대학교 식품영양학과)
  • Published : 2007.05.30
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Abstract

Changes in physicochemical quality and antioxidant activity of kiwifruits by the low dose electron beam irradiated(0, 0.3, 0.6 kGy) were investigated. Fruits were stored at $20^{\circ}C$ for 28 days and evaluated after 0, 1, 2, 3, and 4 week storage. Irradiation did not affect 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activities, and pH. Vitamin C contents of irradiated fruits were higher than non-irradiated fruits. Irradiation caused no significant change in total sugar contents and reducing sugar contents. Soluble solid contents in irradiated fruits were higher than non-irradiated fruits for the initial storage period but showed lower increment rate during the storage period. Organic acid contents of irradiated fruit did not show significant effect for the initial and during the storage periods, rate of decline in organic acid content of irradiated fruit were not significantly changed. Results indicated that electron beam irradiation of kiwifruit up to 0.6 kGy is effective in was delayed ripening with no significant changes on antioxidant activity and physicochemical qualify of kiwifruit.

참다래에 0.3 및 0.6 kGy의 저선량 전자선 조사를 실시한 후 $20^{\circ}C$, 4주간 저장하면서 0, 1, 2, 3 및 4주차에 항산화 활성과 이화학적 품질변화에 미치는 영향을 조사하였다. 수소공여능, pH는 조사에 의한 변화는 없었으며, 비타민 C 함량은 조사구에서 높게 나타났다. 당 함량은 저장기간 동안 후숙이 진행되면서 증가하였으나 조사에 의한 유의차는 나타내지 않았다. 가용성 고형물 함량은 조사구에서 저장초기에 높았으나 저장기간에 따른 증가폭은 적었다. 유기산의 경우 저장 초기에 조사에 의한 변화가 적으면서 조사한 참다래의 경우 저장기간 동안 유기산 함량의 감소폭이 적게 나타났다. 따라서 참다래에 대한 0.6 kGy까지의 전자선 조사는 약간의 후숙 지연 효과를 가지면서 항산화 활성 및 이화학적 품질에는 영향을 미치지 않는 것으로 사료되었다.

Keywords

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