한국식품저장유통학회지 (Food Science and Preservation)

  • 제22권5호
  • /
  • Pages.708-713
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  • 2015
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  • 3022-5477(pISSN)
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  • 3022-5485(eISSN)
한국식품저장유통학회 (The Korean Society of Food Preservation)
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열풍건조 온도에 따른 고구마 잎 메탄올 추출물의 항산화 효과

Effect of hot-air drying temperature on antioxidative activity of sweetpotato leaves

  • 정다운 (목포대학교 공과대학 식품공학과) ;
  • 박양균 (목포대학교 공과대학 식품공학과) ;
  • 남상식 (농촌진흥청 국립식량과학원 바이오에너지작물연구소) ;
  • 한선경 (농촌진흥청 국립식량과학원 바이오에너지작물연구소)
  • Jeong, Da-Woon (Department of Food Science and Technology, Mokpo National University) ;
  • Park, Yang-Kyun (Department of Food Science and Technology, Mokpo National University) ;
  • Nam, Sang-Sik (Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration) ;
  • Han, Seon-Kyeong (Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration)
  • 투고 : 2015.05.18
  • 심사 : 2015.10.06
  • 발행 : 2015.10.30
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초록

고구마 잎을 건조 채소화 하기 위한 기초자료를 제공하기 위해서 열풍건조한 고구마 잎 메탄올 추출물에 함유된 총 탄닌, 총 플라보노이드, 총 폴리페놀 함량을 분석하고, 항산화 효과로 DPPH 라디칼 소거활성, ABTS 라디칼 소거능, 아질산염 소거능 등을 분석 비교 검토하였다. 총 탄닌 함량은 신미 $40^{\circ}C$에서 10.87 mg/g, $70^{\circ}C$에서 7.28 mg/g으로 감소되었고, 총 플라보노이드는 하얀미 $40^{\circ}C$에서 55.37 mg/g, $70^{\circ}C$에서 39.63 mg/g으로 감소되었다. 즉 저온건조가 고온건조보다 이들 물질의 함량이 많았다. DPPH 라디칼소거 활성은 신미와 하얀미 $40^{\circ}C$에서 84.33%와 85.25%로 가장 높았으며, ABTS 라디칼 소거능도 $40^{\circ}C$ 처리구에서 80%가 넘는 높은 값이었다. 아질산염 소거능은 신미와 하얀미가 $40^{\circ}C$에서 76.15%와 73.74%로 가장 높았고 $70^{\circ}C$에서는 낮았다. 품종 간에는 하얀미가 신미보다 페놀성 물질과 항산화 물질이 더 많은 것으로 나타났다. 즉 건조한 고구마 잎의 항산화 효과는 품종간의 차이는 있었으나, $40^{\circ}C$ 시료에서 높고, $70^{\circ}C$ 시료에서 낮았다. 이는 건조온도에 의해 영향을 받는 것으로서 낮은 온도에서 건조하는 것이 유효성분의 감소가 적어 항산화 능력이 높은 결과이었다.

To provide the basic data to dry vegetate the sweetpotato leaves, the total contents of tannin, flavonoid and polyphenol in the methanol extract from the hot-air dried sweetpotato leaves were analyzed and DPPH radical scavenging activity, ABTS radical scavenging ability, nitrite scavenging ability, and others were comparatively analyzed. The total tannin content was decreased from Shinmi of 10.87 mg/g at $40^{\circ}C$ to 7.28 mg/g at $70^{\circ}C$ and the total flavonoid was decreased from Hayanmi of 55.37 mg/g at $40^{\circ}C$ to 39.63 mg/g at $70^{\circ}C$. That is, the low temperature drying contained more of these substances than in the high temperature drying. The DPPH radical scavenging activity was the highest in Shinmi and Hayanmi of 84.33% and 85.25% at $40^{\circ}C$, and the ABTS radical scavenging ability was a high value of over 80% in the treatment plot at $40^{\circ}C$. The nitrite scavenging ability was highest in Shinmi and Hayanmi of 76.15% and 73.74% at $40^{\circ}C$ but low at $70^{\circ}C$. That is, the antioxidant effect of the hot-air dried sweetpotato leaves was high in the sample of $40^{\circ}C$ and low in the sample of $70^{\circ}C$. Affected by the drying temperature, the high antioxidant effect is resulting from the little decrease of active ingredient when drying at low temperatures.

키워드

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  2. Analysis of Physiological Activity and Cytotoxicity of Fermented and Hot Water Extracts Using Residues after Sweet Potato (Ipomoea batatas L.) Harvest vol.53, pp.5, 2019, https://doi.org/10.14397/jals.2019.53.5.93
  3. Selection of Excellent Sweetpotato Varieties Suitable for Tip Vegetable Use vol.52, pp.4, 2015, https://doi.org/10.9787/kjbs.2020.52.4.342