Journal of Chitin and Chitosan (한국키틴키토산학회지)

The Korean Society for Chitin and Chitosan (한국키틴키토산학회)
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Spray-Dried Powder Preparation and Physicochemical Properties of Green Coffee Bean Extracts

커피 생두 추출물을 이용한 분무건조 분말의 제조 및 물리화학적 품질특성

  • Kim, Ju-Hyeon (Department of Food Science and Technology, Daegu Catholic University) ;
  • Hong, Joo-Heon (Department of Food Science and Technology, Daegu Catholic University)
  • 김주현 (대구가톨릭대학교 식품공학전공) ;
  • 홍주헌 (대구가톨릭대학교 식품공학전공)
  • Received : 2018.11.28
  • Accepted : 2018.12.06
  • Published : 2018.12.30
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Abstract

In this study, the physicochemical properties of freeze dried (FD) and spray dried powders (SD-MD10, SD-MD20, SD-CD10, SD-CD20) from green coffee bean extract were investigated. Yields were 91.46% for FD powder and 71.63~87.98% for SD powders, respectively. The moisture content of SD powders (1.39~1.86%) was lower than that of FD powder (3.19%). L, a and b value of SD powders were higher than of FD powder. The particle size of the FD powder ($147.67{\mu}m$) was higher than that of the SD powders ($54.23{\sim}66.07{\mu}m$). The water absorption index of the SD powders (0.51-0.59) were lower than that of the FD powder (0.72). The water solubility index of the SD powders, 77.26-90.07%, was higher than that of the FD powder (70.07%). The total phenolic and flavonoid contents of SD-CD10 were 20.67 g/100 g and 8.92 g/100 g, respectively. The chlorogenic acid content of SD-CD10 (12.04 g/100 g) was higher than other SD powders. The DPPH and superoxide radical scavenging activities of SD-CD10 at $1,000{\mu}g/mL$ were 88.02% and 86.89%, respectively. The SD-CD10 was better than other SD powders on protective effects against oxidative stress in L-132 cells (87.33%). In conclusion, we provided experimental evidence that spray-dried powder of green coffee bean extracts have potential as functional food materials.

본 연구에서는 커피 생두의 활용성 증대 및 기능성 식품 소재로 개발하기 위하여 커피 생두를 80% 에탄올로 추출한 후 동결건조 및 분무건조를 실시하여 분말의 물리화학적 품질특성을 조사하였다. 수율은 동결건조 분말이 91.46%로 분무건조 분말(71.63~87.98%)보다 높았으며, 수분함량은 사이클로 덱스트린을 10% 첨가한 분무건조분말에서 1.39%로가장 낮은 함량을 나타내었다. 분무건조 분말의 색도는 동결건조 분말에 비해 L값, a값 및 b값이 전체적으로 증가하였으며, 입자크기는 사이클로덱스트린을 10% 첨가한 분무건조 분말에서 $54.23{\mu}m$로 가장 작게 나타났다. 수분흡수지수 및 수분용해 지수는 사이클로덱스트린을 10% 첨가한 분무건조 분말이 각각 0.51 및 90.07%를 나타내었다. 총 페놀 및 총 플라보노이드 함량은 사이클로덱스트린을 10% 첨가한 분무건조 분말이 20.67 g/100 g 및 8.92 g/100 g을 나타내었으며, chlorogenic acid 함량은 사이클로덱스트린을 10% 첨가한 분무건조 분말에서 12.04 g/100 g을 나타내었다. 분무건조 분말의 DPPH 및 superoxide radical 소거활성은 사이클로덱스트린을 10% 첨가한 분무건조 분말 $1,000{\mu}g/mL$ 농도에서 각각 88.02% 및 86.89%를 나타내 가장 우수하였다. 폐 정상세포인 L-132 세포에 커피 생두 추출물 분무건조 분말을 처리하여 세포 사멸에 대한 보호효과를 측정한 결과, 모든 시료에서 농도의존적으로 세포생존률이 증가하였으며, 특히 사이클로덱스트린을 10% 첨가한 분무건조 분말에서 87.33%로 세포 활성이 증가하여 우수한 세포 보호효과를 확인하였다.

Keywords

Acknowledgement

Supported by : 중소벤처기업부

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