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Effects of drying methods on quality characteristics and antioxidative effects of Omija (Schizandra chinesis bailon)

건조방법을 달리한 오미자의 품질특성 및 항산화 효과

  • Lee, Seul (Department of Food and Food-Service Industry, Kyungpook National University) ;
  • Moon, Hey-Kyung (Center for Scientific Instruments, Kyungpook National University) ;
  • Lee, Su-Won (Tory Food Company) ;
  • Moon, Jae-Nam (Department of Food and Food-Service Industry, Kyungpook National University) ;
  • Kim, Jong-Kuk (Department of Food and Food-Service Industry, Kyungpook National University)
  • 이슬 (경북대학교 식품외식산업학과) ;
  • 문혜경 (경북대학교 공동실험실습관) ;
  • 이수원 ((주)토리식품) ;
  • 문재남 (경북대학교 식품외식산업학과) ;
  • 김종국 (경북대학교 식품외식산업학과)
  • Received : 2014.04.10
  • Accepted : 2014.06.19
  • Published : 2014.06.30

Abstract

The antioxidative effect and quality characteristics of different drying methods (hot air drying, far-infrared radiation drying, vacuum freeze drying) from Schizandra Chinensis Baillon were investigated. The moisture contents and water activity(Aw) contents each 4.46% and 0.38 values of the vacuum freeze drying were lower than those of other samples. A significant not difference in pH values occurred in all samples (p<0.05). The highest content $^{\circ}brix$ vacuum freeze drying was $6.60^{\circ}Brix$ respectively. The turbidity values of the samples were hot air drying 8.24 T%, far infrared radiation drying 0.32 T%, vacuum freeze drying 71.85 T%. The Hunter's L, a and b values of vacuum freeze drying were higher than those of other samples. The order of the free sugar content was glucose>fructose>sucrose, and that of the total free sugar contents were vacuum freeze drying (6.33 g/100 g) > far infrared drying (5.01 g/100 g) > hot air drying (3.73 g/100g). Antioxidant acitivy (DPPH radical scavenging, ABTS radical scavenging) and total phenol, total flavonoid, and total tannin content was highest in vaccum freeze drying than other different drying methods except nitrite scavenging ability.

본 연구에서는 건조방법(열풍건조, 원적외선건조, 진공동결건조)을 달리한 오미자의 품질 특성 및 항산화 효과를 비교 검토하여 고품질의 건조 오미자를 얻기 위한 기초자료를 제시하고자 하였다. 수분 함량 및 수분활성도(Aw)는 열풍건조 > 원적외선건조 > 진공동결건조 순으로 나타났다. pH는 건조방법에 따른 차이는 없었고, 당도는 $6.60^{\circ}Brix$로 진공동결건조 오미자가 가장 높은 값을 나타내었다. 탁도는 열풍건조 8.24 T%, 원적외선건조 0.32 T%, 진공동결건조 71.85 T%를 나타내었으며, 색도 L, a, b는 진공동결건조가 다른 건조방법에 비해 높게 나타났다. 유리당 함량은 glucose > fructose > sucrose 순으로 나타내었고, 총 유리당 함량은 진공동결건조 오미자가 5.01 g/100 g으로 가장 높은 값을 나타내었다. 항산화 활성에서 DPPH radical 소거능, ABTS radical 소거능에서는 각각 진공동결건조 오미자가 88.68%, 93.85%로 가장 높은 활성을 나타내었다. 반면 아질산염 소거능은 원적외선건조 오미자가 90.04%로 가장 높은 값을 나타내었고, 열풍건조 오미자는 88.78%, 진공동결건조 오미자가 82.58%의 순으로 활성을 나타내었다. 총페놀, 총 플라보노이드, 총 탄닌 함량에서 진공동결건조 오미자가 1633.70 mg/100 g, 351.35 mg/100 g, 514.04 mg/100 g으로 가장 높은 값을 나타내었다. 이상의 결과에서 건조방법은 오미자의 품질특성 및 항산화 효과에 유의적인 영향을 주는 것으로 나타났으며, 진공동결건조 오미자는 다른 건조방법에 비해 높은 품질 특성과 항산화 효과를 나타내었다.

Keywords

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