Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Physicochemical Characteristics of Cheonnyuncho Fruit (Opuntia humifusa) Fermented by Leuconostoc mesenteroides SM

Leuconostoc mesenteroides SM을 이용한 천년초(Opuntia humifusa) 열매 발효물의 물리·화학적 특성

  • Park, Min-Ju (Department of Food Science and Technology, Keimyung University) ;
  • Lee, Sam-Pin (Department of Food Science and Technology, Keimyung University)
  • Received : 2013.03.10
  • Accepted : 2013.06.21
  • Published : 2013.08.31
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Abstract

Functional properties of Cheonnyuncho fruit paste (CFP) were enhanced by fermentation, using Leuconostoc mesenteroides SM. The stability of CFP pigment was maintained and microorganisms in crude CFP were sterilized by heating at $80^{\circ}C$ for 30 min. The production of dextran in CFP was increased by increasing the fermentation time and sugar content, resulting in an increase of consistency. The CFP fermented with 20% sucrose contained 4.8% mucilage after fermentation for 2 days. In particular, the production of mucilage was greatly enhanced by fortification with 3% sodium citrate in CFP, resulting in mucilage production of 7%. In addition, the viscous modulus of fermented CFP showed a greater increase than that of the elastic modulus. Thus, it was concluded that CFP fermented by L. mesenteroides SM can be fortified with functional ingredients, such as mucilage and probiotics, with enhanced rheological properties. Therefore fermented CFP can be utilized as the functional ingredients for functional foods.

천년초 열매의 기능성 및 물성을 개선하기 위해서 Leuconostoc mesenteroides SM을 이용하여 천년초 열매 추출액의 젖산 발효를 수행하였다. 천년초 열매의 수분함량은 71.7%, 가식부 65%로 나타났으며, 점질물 함량은 1.8%로 측정되었다. 천년초 열매 추출액은 열처리 시간이 증가함에 따라 점조도와 점탄성이 감소하였고, 퍼짐성은 증가하는 경향을 나타내었다. 또한 잔존하는 미생물은 $80^{\circ}C$에서 30분 열처리에 의해 사멸 되었으며, 천년초 열매색소는 비교적 안정한 값을 유지하였다. 고분자 dextran 생성을 위해 sucrose 함량을 20%까지 첨가하여 발효한 결과, sucrose 첨가량과 발효 시간이 증가할수록 점질물 함량 및 점조도는 증가하였으며 퍼짐성은 감소하였다. Sucrose을 20% 첨가하여 3일 동안 발효한 발효물의 점질물 함량이 4.8%로 가장 높게 나타났으며, sucrose 전환율은 90%를 보였다. 특히 sodium citrate 3% 첨가 시 발효 3일째 발효물의 점질물은 7%까지 증가하였고, 점조도 역시 가장 높은 값을 나타내었다. 발효된 천년초 열매 추출액은 생성된 고분자 dextran에 의한 높은 점성 성질을 나타내면서, 가공적성 증진과 probiotics가 강화된 기능성 발효물로 전환될 수 있었다. 또한 기능성이 강화된 천년초 발효 소재는 기능성식품 및 가공식품의 소재로서의 활용이 기대된다.

Keywords

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