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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Gamma Irradiation on Physicochemical Properties of Red Beet and Stability of Betalain in the Red Beet (Beta vulgaris L.)

감마선 조사가 비트(Beta vulgaris L.)의 물리화학적 특성 및 Betalain 색소 안정성에 미치는 영향

  • Kim, Kyoung-Hee (Dept. of Food and Nutrition, Chungnam National University) ;
  • Lee, Sung-A (Dept. of Food and Nutrition, Chungnam National University) ;
  • Yook, Hong-Sun (Dept. of Food and Nutrition, Chungnam National University)
  • 김경희 (충남대학교 식품영양학과) ;
  • 이성아 (충남대학교 식품영양학과) ;
  • 육홍선 (충남대학교 식품영양학과)
  • Published : 2007.04.30
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Abstract

The physicochemical properties of red beets and the stability of betalain pigments irradiated at 2.5, 5, 10 and 30 kGy were evaluated. Betalain extraction yield of irradiated red beets was not significantly different from non-irradiated red beet. The red beet irradiated at 5kGy showed high optical density value in betacyanin and betaxanthin. In Hunter's color value lightness (L), redness (a) and yellowness (b) decreased with increment of irradiation dose. All red beets showed no difference in pH. The red beets irradiated above 10 kGy had poor textural property quality but antioxidant activity of betalain was not significantly changed by gamma irradiation. Considering natural colorant and textural quality, the gamma irradiation above 10kGy was an undesirable technique for red beets.

감마선 조사가 비트의 품질특성 및 비트의 주요 색소인 betalain에 미치는 영향을 알아보기 위해 비트에 2.5kGy, 5kGy, 10kGy 및 30kGy로 감마선 조사를 실시하였다. 조사에 따른 betalain추출량에는 차이가 없었으며 betacyanin과 betaxanthin은 5kGy의 조사선량에서 높은 optical density 값을 나타내었다. 조사선량이 증가할수록 비트의 명도, 적색도 그리고 황색도는 감소하였으며 pH는 조사에 따른 차이를 나타내지 않았다. 10kGy이상의 감마선 조사는 물성에 나쁜 품질을 나타내었으며 항산화효과는 감마신 조사에 의한 유의적인 변화(p<0.05)를 보이지 않았다. 따가서 천연색소 및 물성 측면에서 볼 때 비트에 대한 10kGy 이상의 감마선 조사는 바람직하지 않은 것으로 생각한다.

Keywords

References

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