Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effect of Different Pre-treatments on the Physicochemical and Antioxidant Activities of Cold-Vacuum Dried Peaches

전처리조건에 따른 냉풍감압건조 복숭아의 이화학적 및 항산화 활성

  • Kwon, Gi-Man (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Kim, Jae-Won (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Youn, KwangSup (Department of Food Science and Technology, Catholic University of Daegu)
  • 권기만 (대구가톨릭대학교 식품공학전공) ;
  • 김재원 (대구가톨릭대학교 식품공학전공) ;
  • 윤광섭 (대구가톨릭대학교 식품공학전공)
  • Received : 2013.04.04
  • Accepted : 2013.06.19
  • Published : 2013.08.31
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Abstract

This study was performed to determine the effects of the pretreatment and cold-vacuum drying methods on the physicochemical properties and antioxidant activities of dried peaches. Moisture content was significantly lower with 0.3% NaCl treatment with cold-vacuum drying. The pH, brix and acid ratio (SS/TA) were the lowest with 1.0% soluble Ca treatment, while soluble solid and SS/TA were significantly higher with 0.1% vitamin C treatment compared to those with other treatments. The ${\delta}E$ and browning degree was lower in the pretreated sample compared to the untreated sample. Cutting strength of dried peaches was highest in the pretreated samples, and it was the highest with 1.0% soluble Ca treatment. Total sugar content with 0.1% vitamin C and 1.0% soluble Ca treatment was significantly higher than that with 0.3% NaCl treatment. The free sugar content was lower with 0.3% NaCl treatment but it was higher with 0.1% vitamin C and 1.0% soluble Ca treatment. The sensory evaluation result was highest with 0.1% vitamin C treatment. Phenolic compounds and antioxidant ability were the highest with the 0.1% vitamin C and 0.1% soluble Ca treatment; all the dried peaches showed relatively high antioxidant activities. These results suggest that pretreatment can affect the quality of dried peaches, showing that cold-vacuum drying can be applied for the production of high quality dried peach products.

전처리 방법에 따른 냉풍감압건조 복숭아의 이화학적 및 기능적 특성을 조사한 결과 수분함량은 0.3% NaCl 처리에서 유의적인 낮은 수분함량을 나타내었다. pH의 경우 전처리 구에서 낮아지는 경향을 보였고, 당도 및 당산비는 0.1% Vit-C 처리에서 높은 값을 나타내었다. 색도는 전반적으로 건조가 진행될수록 밝기를 나타내는 L 값은 감소하는 경향을 보였으며 색차는 Vit-C>NaCl>Sol-Ca>non-treated 순으로 낮은 값을 나타내었다. 갈변도 또한 색차의 결과와 일치하는 경향을 나타내었다. 총당은 무처리, NaCl, Vit-C 및 Sol-Ca 처리구가 무처리에 비해 높은 함량을 나타내어 향기 및 감미 유지 효과가 있는 것으로 관찰되었고, 유리당은 Vit-C 및 Sol-Ca 처리구에서 fructose, glucose 및 sucrose의 함량이 높은 것으로 나타났다. 절단력은 무처리에 비해 전처리구에서 증가하는 결과를 나타내었으며, Sol-Ca 처리구에서 가장 높은 값을 나타내었다. 관능특성에서는 전처리 구가 무처리에 비하여 외관, 색, 맛, 종합적 기호도가 높아지는 결과를 나타내었으며 특히, Vit-C 처리에서 가장 높은 기호특성을 나타내었다. 전처리방법에 따른 폴리페놀, 플라보노이드 및 프로안토시아니딘 함량에서는 전반적으로 전처리 구에서 높은 함량을 나타내었으며 프로안토시아니딘 함량에서 Vit-C 처리에서 가장 높은 함량을 나타내었다. 항산화능에서는 유용성분 함량이 높을수록 라디칼 소거능이 높아지는 양적 상관관계를 나타내었다.

Keywords

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