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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Quality Characteristics of Low-Dose X-Ray Irradiated-Imported Navel Oranges during Storage at Room Temperature (20℃)

저선량 X선 조사 수입 오렌지의 상온 저장 중 품질 특성

  • Noh, Dan-Bi (Department of Food and Nutrition, Chungnam National University) ;
  • Kim, Kyoung-Hee (Department of Food and Nutrition, Chungnam National University) ;
  • Yook, Hong-Sun (Department of Food and Nutrition, Chungnam National University)
  • 노단비 (충남대학교 식품영양학과) ;
  • 김경희 (충남대학교 식품영양학과) ;
  • 육홍선 (충남대학교 식품영양학과)
  • Received : 2015.09.09
  • Accepted : 2015.10.12
  • Published : 2016.01.31
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Abstract

This study evaluated the effects of low-dose X-ray irradiation treatment on quality characteristics and sensory evaluation of imported navel oranges during storage at $20^{\circ}C$ for 12 days. The samples were irradiated at doses of 0.2, 0.4, 0.6, 0.8, and 1.0 kGy, and changes in color value, hardness, Brix/acid ratio, total sugar content, reducing sugar content, vitamin C content, and sensory evaluation were investigated. There were no significant differences between non-irradiated and irradiated samples in terms of color value, Brix/acid ratio, total sugar content, reducing sugar content, and vitamin C content. Difference in hardness between non-irradiated and irradiated samples decreased at the end of storage. Reducing sugar content was reduced as storage period increased. The sensory evaluation scores of non-irradiated and irradiated samples were not significantly different according to storage period, except for sweetness and texture. Overall acceptability was not significantly different by irradiation dose or storage period. These results suggest that X-ray irradiation does not affect quality characteristics or sensory evaluation.

X선 조사에 의한 수입 오렌지의 품질 특성을 조사하여 방사선 식품 검역 관리의 기초자료로 활용하기 위하여 미국산 Navel orange에 선량 0.2, 0.4, 0.6, 0.8, 1.0 kGy의 X선을 조사하여 상온($20{\pm}0.1^{\circ}C$)에서 12일간 저장하면서 색도, 경도, 당산비, 총당, 환원당, 비타민 C 함량을 조사하였다. 색도, 당산비, 총당 및 환원당 함량, 비타민 C 함량은 조사선량에는 유의적 차이가 없었다. 경도는 저장 후기에 비조사구와 조사구의 차이가 점차 감소하며 비조사구와 다른 조사구가 유사한 값을 나타냈다. 환원당 함량은 저장기간에 따라 감소하는 경향을 보였다. 관능평가에서 비조사구와 조사구는 단맛과 질감을 제외하고는 저장기간에 따른 유의적 차이가 없었다. 전체적인 선호도에서는 저장기간과 조사선량에 유의적 차이가 없었다. 상기의 결과를 종합하여 볼 때 X선 조사는 오렌지의 관능적 특성과 품질 특성에 영향을 미치지 않는 것으로 보인다.

Keywords

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