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Antioxidant Compounds and Activities as well as Caffeine Content of Aronia melanocarpa Leaf Tea according to Pan-Roasting Conditions

아로니아잎차의 덖음조건에 따른 항산화 성분과 항산화 활성 및 카페인 함량

  • Park, Soojin (Department of Food and Nutrition, Semyung University) ;
  • Jung, Sunghoon (Department of Food and Nutrition, Semyung University)
  • 박수진 (세명대학교 식품영양학과) ;
  • 정성훈 (세명대학교 식품영양학과)
  • Received : 2017.02.07
  • Accepted : 2017.04.13
  • Published : 2017.05.31

Abstract

Differences in bioactive compounds and antioxidant activities of aronia leaf (AL) extracts according to manufacturing conditions such as different number of pan-roasting and different temperatures were investigated. Both total polyphenolic compounds and total flavonoids contents were the highest in six time-pan-roasted AL tea extract ($37.96{\pm}0.48mg$ catechin equivalent/g and $19.96{\pm}0.44mg$ quercetin equivalent/g, respectively) among four tea samples. Antioxidative activities were also the highest in six time-pan-roasted AL tea extract with $IC_{50}$ 0.43 mg/mL and $IC_{50}$ 0.27 mg/mL based on DPPH and ABTS radical scavenging activities, respectively. HPLC analysis revealed that AL tea infusion did not have caffeine regardless of manufacturing conditions, whereas green tea infusion had 3.8 mg/g caffeine. Results demonstrated that AL tea can be expected as caffeine free leaf tea containing antioxidant benefits. Moreover, specific pan-roasting conditions of AL tea would be very important for its functional and sensory attributes.

본 연구는 아로니아 생잎과 여러 가지 덖음조건에 따라 아로니아잎차를 제조하고, 이들의 항산화 유용성분과 항산화 활성도를 비교하였다. 생잎에 비해 아로니아잎을 6회 덖은 경우 총폴리페놀 및 플라보노이드 함량이 각각 37.96 CE mg/g, 19.96 QE mg/g으로 가장 높게 나타났다. 또한, 6회 덖은 아로니아잎 추출물은 DPPH 및 ABTS 라디칼 소거능도 각각 $IC_{50}$ 0.43 mg/mL 및 0.27 mg/mL로 가장 높은 항산화 활성을 나타내었다. 그러나 덖음조건에 따른 폴리페놀 함량 변화에 영향을 주는 인자에 대해서는 추후 연구가 필요하다. 아로니아 생잎과 잎차 모두 카페인은 함유하지 않는 것으로 확인되어 아로니아 잎차는 무카페인 차로써의 가치가 있음을 확인하였다. 결론적으로 아로니아잎에 함유된 총폴리페놀, 총플라보노이드와 같은 항산화 유용성분은 물론 항산화 활성을 극대화할 수 있는 최적화된 덖음조건에 대한 기초자료를 확보할 수 있었으며, 아로니아 잎은 카페인을 함유하지 않는 항산화 기능성 잎차 또는 바이오식품 소재로서 그 활용가치가 기대된다고 할 수 있다.

Keywords

References

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