Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Enhances Antioxidant Effect of Purple Sweet Potato by Roasting

볶음처리에 의한 자색고구마의 항산화 증진 효과

  • Cho, Kye Man (Department of Food Science, Gyeongnam National University of Science and Technology) ;
  • Joo, Ok Soo (Department of Food Science, Gyeongnam National University of Science and Technology)
  • 조계만 (경남과학기술대학교 식품과학부) ;
  • 주옥수 (경남과학기술대학교 식품과학부)
  • Received : 2012.06.13
  • Accepted : 2012.10.05
  • Published : 2012.10.30
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Abstract

Purple sweet potato (PSP, Ipomoea batatas) has various biological effects including antidiabetic, anti-inflammatory, and antioxidant activities. In this study, the antioxidant activity of PSP after roasting were compared using DPPH, ABTS, and FRAP assays. In addition, the total phenolics and flavonoid contents, Maillard reaction products, and phenolic acid contents were measured to identify the factors that changed PSP,s antioxidant activity due to roasting. The roasted PSP exhibited significantly higher antioxidant activity than unroasted PSP. In particular, the PSP roasted at $200^{\circ}C$ for 10 min showed the highest antioxidant activity among all the PSPs that were roasted under different conditions. The total phenolic and flavonoid contents, Maillard reaction products and phenolic acid contents markedly increased, corresponding to the general increase in antioxidant activities after roasting. These results suggest that roasted PSP extracts are potential source of natural antioxidants that may be used in certain food applications.

자색고구마는 항당뇨, 항염증, 및 항산화 활성 등의 다양한 생리활성 효과가 있다. 본 연구에서는 자색고구마의 볶음 처리 후 DPPH, ABTs 및 FRAP를 분석하여 항산화 활성을 비교하였다. 부가적으로 우리는 볶음 처리에 의한 자색 고구마의 항산화 활성 변화 요인을 확인하기 위해 총 phenolics와 flavonoids 함량, 갈변물질 및 phenolic acids 함량을 측정하였다. 볶은 자색고구마는 볶지 않은 자색고구마보다 상당히 높은 항산화 활성을 나타내었다. 특히, $200^{\circ}C$에서 10분간 볶음처리 한 자색고구마는 다른 처리 조건들보다 높은 항산화 활성을 나타내었다. 볶음 처리 후 총 phenolic와 flavonoid 함량, 갈변물질 및 phenolic acids 함량이 현저하게 증가하였고, 이에 상응하여 항산화 활성이 증가하였다. 이 결과로부터 볶음 처리한 자색고구마는 식품에서 잠재적인 천연 항산화제로 사용할 수 있을 것으로 판단되었다.

Keywords

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