Journal of the East Asian Society of Dietary Life (동아시아식생활학회지)

The East Asian Society of Dietary Life (동아시아식생활학회)
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Quality Characteristics and Antioxidant Activities of Fermented Deodeok Tea with Pleurotus eryngii Mycelium

Pleurotus eryngii Mycelium으로 발효한 더덕 차의 품질 및 항산화 특성

  • Received : 2013.09.02
  • Accepted : 2013.10.31
  • Published : 2013.10.31
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Abstract

This study was conducted to obtain the baseline data for fermented tea with King oyster (Pleurotus eryngii) mushroom mycelium as well as to investigate the possibility of development for deodeok processing products. For this research, the physicochemical properties and antioxidant activity for fermented tea were confirmed by different roasting temperatures and roasting times. The results of the physicochemical properties, browning, turbidity, reducing sugar, total polyphenol and total flavonoid contents, were increased with increasing roasting temperature and roasting time, whereas the pH was decreased. The results of the antioxidant activity test of fermented tea, DPPH radical-scavenging activity, FRAP and reducing power, were increased with increasing roasting temperature and roasting time. The preference of fermented tea was confirmed as being the highest when roasted at $180^{\circ}C$ for 30 min. Although fermented tea did not have a unique flavor of mushroom and burnt flavor, it had strong color, flavor and taste. For this reason, fermented tea production for high content of functional materials and high preference is possible by roasting at $180^{\circ}C$ for 30 min. As for the results of this study, the physical properties of fermented deodeok were relatively stable on high temperature exposure and furthermore, the development of a variety of foods will be possible because fermented deodeok has an antioxidant capacity.

새송이 버섯균사체를 이용한 발효 더덕의 가공제품 개발가능성과 발효차에 대한 기초자료 제시를 위하여 기초연구를 실시하였다. 이에 발효 더덕을 볶음온도 및 볶음시간을 달리하여 발효차를 제조하여 이화학특성 및 항산화력을 측정하였다. 이화학적 특성 결과, 갈색도, 탁도, 환원당, 총 폴리페놀 및 총 플라보노이드 함량은 볶음온도 및 볶음시간이 증가함에 따라 증가였으나, pH는 감소하였다. 발효차의 항산화 활성의 경우, DPPH radical 소거능, FRAP 및 환원력은 볶음온도 및 볶음시간이 증가함에 따라 증가하는 경향을 보였다. 관능검사 결과, $180^{\circ}C$에서 30분 볶음 처리한 차의 기호도가 가장 높았는데, 이는 다른 시료에 비해 진한 색, 향, 맛이었으나, 버섯 고유의 취와 탄 향이 나지 않았기 때문이었다. $180^{\circ}C$ 30분간 볶음 처리시료는 대조구와 비교 시 기능성 함량 수준도 높고, 무엇보다 기호도가 높아 소비자의 요구에 가장 부합되는 차를 제조할 수 있을 것으로 판단된다. 본 실험의 결과, 발효 더덕은 항산화력이 높고, 고온노출에서도 물성이 비교적 안정하여 차 이외의 다양한 가공품 개발이 가능할 것으로 사료된다.

Keywords

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