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Change of Antioxidant Activity and Quality Characteristics of Gaeseong-Juak Prepared with Prunus yedoensis Matsumura Extract during the Storage Period

화피 추출물 첨가 개성주악의 저장과정 중 항산화 활성 및 품질특성 변화

  • Joo, Shin Youn (Dept. of Food and Nutrition, Sookmyung Women's University)
  • 주신윤 (숙명여자대학교 식품영양학과)
  • Received : 2013.03.06
  • Accepted : 2013.04.12
  • Published : 2013.07.31

Abstract

This study investigated the quality characteristics, oxidative stability, and antioxidative activity of a Korean fried rice cake, Gaeseong-Juak (doughnut of waxy rice) to which Prunus yedoensis Matsumura (PYM) extract, vitamin C, and BHT were added and stored at $60^{\circ}C$ for 4 days. Gaeseong-Juak was prepared by adding PYM extract at 0, 0.5, 1, and 2% of waxy rice powder. It was found that as the content of PYM extract increased, L-values significantly decreased while a-value and b-value significantly increased (P<0.001). The hardness and adhesiveness were increased with an increase in PYM extract, and as the storage period increased. In the sensory evaluations, the sample containing 0.5% and 1.0% PYM extract gave good scores. In the Gaeseong-Juak with PYM extract, the acid value, peroxide value, and p-anisidin value of PYM extract groups were found to have a higher oxidative stability than those of 0% PYM extract group (P<0.05). The antioxidative activity of Gaeseong-Juak to which PYM extract was added increased as the content of PYM extract increased (P<0.001). It was suggested that the shelf life of Gaeseong-Juak could be extended by the use of natural antioxidants, reducing the deterioration of the quality of Gaeseong-Juak.

본 연구에서는 화피 추출물을 첨가하여 제조한 개성주악에 대해 합성 항산화제를 첨가한 개성주악과 그 산화안정성을 비교하면서 저장기간($60^{\circ}C$, 4일) 동안 항산화 활성 및 품질 특성의 변화를 측정하였다. 개성주악의 색도 측정 결과 화피 추출물 첨가량의 증가, 저장기간의 증가에 따라 L값은 감소하고 a값과 b값이 높아지는 경향을 나타냈다. 조직감 측정결과에서는 화피 추출물의 첨가는 개성주악의 경도와 응집성을 높이고 부착성을 감소시키는 경향을 나타내었으며, 저장기간에 따른 변화에서도 유사한 경향을 나타냈다. 관능검사 결과 색, 맛, 전반적인 기호도에서 0.5, 1% 첨가군이 높은 점수를 나타냈으며, 이러한 경향은 저장기간 동안 유사하게 나타났다. 화피 추출물 첨가군의 산가, 과산화물가, 아니시단가는 무첨가군과 비교할 때 저장기간 동안 낮게 보여졌으며, 0.02% vitamin C와 0.02% BHT 첨가군의 경우 1, 2% 첨가군과 유사한 산화안정성를 나타내었다. 화피 추출물 첨가 개성주악의 항산화 활성 측정 결과, 시료의 첨가량에 비례하여 그 활성이 유의적으로 증가하였으며 이러한 경향은 저장기간 동안 유지되었다. 이상의 결과에서 개성주악에 대한 화피 추출물의 첨가는 개성주악의 기호도 및 산화안정성, 항산화활성을 증가시켜 개성주악의 가치를 높일 수 있어 바람직할 것으로 사료되며, 개성주악 제조 시 기호도가 높고 산화안정성, 항산화능이 좋았던 0.5~1% 화피 추출물을 첨가하는 것이 적합할 것으로 생각된다.

Keywords

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