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Quality and Antioxidant Characteristics of Granule Tea Prepared with Sea Tangle (Laminaria japonica) and Sea Mustard (Undaria pinnatifida) Powder as Affected by Extraction Method

추출방법을 달리한 미역 및 다시마 과립차의 품질 및 항산화 특성

  • Kwon, Yu-Ri (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Youn, Kwang-Sup (Department of Food Science and Technology, Catholic University of Daegu)
  • 권유리 (대구가톨릭대학교 식품가공학전공) ;
  • 윤광섭 (대구가톨릭대학교 식품가공학전공)
  • Received : 2012.04.25
  • Accepted : 2012.07.06
  • Published : 2012.08.30

Abstract

This study was conducted to evaluate the quality and anti-oxidant characteristics of different granule tea variants (WSMGT: granule tea prepared from sea mustard hot water extract; ASMGT: granule tea prepared from sea mustard autoclave extract; WSTGT: granule tea prepared from sea tangle hot water extract; and ASTGT: granule tea prepared from sea tangle autoclave extract) from sea tangle and sea mustard powder. The Color of WSTGT showed the highest $L^*$, $b^*$ values, and the lowest $a^*$ value. The water absorption binding agents in ASMGT were higher than those in WSMGT, WSTGT. and ASTGT. Binding agents on water absorption in ASMGT were higher than those of WSMGT, WSTGT, and ASTGT. The alginic acid content of ASMGT was highest. The total polyphenol and total flavonoid contents of ASMGT and ASTGT were highest. The electron donating ability and ferrous ion chelating activity in WSTGT greatly increased compared to those in the other granules tea variants. These results suggest that pressure extraction can be used in functional foods.

본 연구에서는 해조류의 고부가가치 창출을 위하여 기호성과 상품성을 향상시킨 해조 과립차의 품질특성 및 항산화 특성을 비교 분석하였다. 미역, 다시마 미세분쇄분말을 열수 및 고압 추출한 후 동결건조하여 얻은 분말의 수율은 미역, 다시마 모두 열수 추출물에서 높았으며 알긴산 함량은 고압 추출물에서 높았다. 추출방법에 따른 미역, 다시마 과립의 흡습특성 및 알긴산 함량은 고압 추출물에서 높은 함량을 나타내었다. 총 폴리페놀 및 플라보노이드 함량은 유의적인 차이는 있으나 큰 차이는 없었다. 미역 과립차의 전자공여능을 비교분석한 결과 고압추출에서 높은 활성을 나타내는 반면 다시마의 과립차에서는 열수추출에서 다소 높은 활성을 보였다. 미역 과립차의 $ABTS^+$ radical 소거능은 열수추출에서 높은 활성을 보였고, 다시마 과립차의 경우 고압추출에서 높은 활성을 나타내었다. $Fe^{2+}$ chelating효과는 열수추출에서 높은 활성을 보였으며, TBARS에서는 고압추출에서 더 높은 값을 나타내었다. 관능평가에서는 미역 다시마 모두 고압추출에서 높은 기호도를 나타내었다.

Keywords

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