한국식품과학회지 (Korean Journal of Food Science and Technology)

한국식품과학회 (Korean Society of Food Science and Technology)
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에탄올 농도에 따른 노니주스 추출물의 항산화활성 및 노니곤약젤리의 품질특성

Antioxidant activities of noni juice extracts using various ethanol ratios and quality characteristics of Konjak jelly added with noni juices

  • 정지선 (대진대학교 교육대학원 영양교육전공) ;
  • 주신윤 (대진대학교 식품영양학과)
  • Jung, Ji Sun (Major in Nutrition Education, Graduate School of Education, Daejin University) ;
  • Joo, Shin Youn (Department of Food Science and Nutrition, Daejin University)
  • 투고 : 2021.05.07
  • 심사 : 2021.06.28
  • 발행 : 2021.08.31
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초록

본 연구에서는 에탄올 농도에 따른 노니주스 추출물의 총 페놀 및 총 플라보노이드 함량을 측정하고, DPPH radical 소거능, ABTS+ radical 소거능 및 환원력을 측정하여 노니주스의 항산화 활성을 확인하였다. 또한 노니주스를 물에 대하여 각각 0, 25, 50, 75, 100%로 대체한 곤약젤리를 제조하여 품질특성 및 관능평가를 실시하였다. 노니주스 추출물의 총 페놀 함량은 0% EtOH 추출물이 6.76 mg GAE/100 g으로 가장 높게 나타났고, 총 플라보노이드는 100% EtOH 추출물이 2.40 mg NE/100 g으로 가장 높은 함량을 나타냈다. DPPH radical 소거능은 50% EtOH 추출물이 72.27%로 가장 높았고, ABTS+ radical 소거능은 100% EtOH 추출물이 42.20%로 높게 나타났다. 환원력은 추출용매에 따른 유의적인 차이가 없었다. 노니 곤약젤리의 pH와 수분함량은 시료 첨가량이 증가함에 따라 유의적으로 감소하였고, 당도는 시료 첨가량이 증가할수록 높아지는 경향을 보였다. 조직감 측정 결과, 노니주스의 첨가량이 증가할수록 곤약젤리의 경도와 검성은 증가하였고, 탄력성과 응집성은 감소하는 경향을 나타냈다. 노니 곤약젤리의 색도 측정결과에서 시료 첨가량이 증가할수록 L값과 b값은 감소하고, a값은 시료 50% 첨가량까지 증가하다가 이후에는 감소하는 경향을 보였다. 관능검사 결과에서 색(color)과 향(flavor)의 기호도는 0%와 25% 첨가군이 높은 점수를 받았고, 나머지 평가항목에서는 시료 간의 유의적인 차이가 없었다. 노니 곤약젤리 제조 시 노니주스 25%의 첨가량이 곤약젤리의 항산화 활성을 증가시킬 수 있고 색과 향의 기호도도 높아 가장 적당할 것으로 판단된다.

This study examined the antioxidant activities of noni juice (NJ) extracts using various ethanol ratios and quality characteristics of Konjak jelly (KJ) supplemented with NJ. The total polyphenol content of 0% EtOH extract (EE) was higher than that of the other samples. The 100% EE contained the highest amount of total flavonoids. The 50% EE showed higher DPPH radical scavenging activity (SA) than the other samples. ABTS+ radical SA was the highest at 100% EE. The pH and moisture content of KJ decreased as the amount of NJ increased. The sugar content of KJ increased with an increase in the amount of NJ. Hardness and gumminess showed an increasing tendency, while L and b values decreased with the addition of NJ. Regarding consumer acceptability, 25% noni KJ was evaluated to be high in color and flavor. As a result, KJ containing 25% NJ was suitable for increasing consumer acceptability and functionality of KJ.

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