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Effect of Rice Fermented using Poria cocos (a Wood-decay Fungus) Mycelium on Fermentation of Doenjang (Soybean Paste)

복령(Poria cocos) 균사체 발효쌀의 첨가가 된장의 품질에 미치는 영향

  • Kwon, O-Jun (Gyeongbuk Regional Innovation Agency) ;
  • Kim, Mi-Ae (Gyeongbuk Regional Innovation Agency) ;
  • Kim, Tae-Wan (Department of Food Science and Biotechnology, Andong National University) ;
  • Kim, Dae-Gon (Faculty of Hotel Cuisine, Daegu Polytechnic College) ;
  • Son, Dong-Hwa (Faculty of Hotel Cuisine, Daegu Polytechnic College) ;
  • Lee, Seon-Ho (Institute of Marine Biotechnology, Andong National University)
  • 권오준 (경북전략산업기획단) ;
  • 김미애 (경북전략산업기획단) ;
  • 김태완 (안동대학교 식품생명공학과) ;
  • 김대곤 (대구산업정보대학 호텔외식조리계열) ;
  • 손동화 (대구산업정보대학 호텔외식조리계열) ;
  • 이선호 (안동대학교 해양바이오산업연구소)
  • Received : 2010.07.27
  • Accepted : 2010.12.16
  • Published : 2011.02.28

Abstract

We investigated changes in doenjang quality upon addition of rice fermented with Poria cocos mycelium. Sensory evaluation showed that rice addition to 15% (w/w) was optimal. The content of free amino acids was 1,899.17 mg% in doenjang fermented for 90 days with P. cocos mycelium. The rice contained seven essential amino acids: leucine, valine, phenylalanine, isoleucine, lysine, threonine, and methionine. The levels of essential amino acids increased after fermentation with P. cocos mycelium. Vitamin A (7.47 RE/100 g), Vitamin D (0.45 mg/100 g), and Vitamin E (5.73 mg/100 g) were detected in the experimental preparation but not in the control. In terms of electron-donating ability, the highest scores were 73.8% (in a water extract) and 76% (in an ethanolic extract) of doenjang fermented with P. cocos mycelium. Nitrite-scavenging ability was higher in the ethanolic extract than in the water extract of rice fermented with P. cocos mycelium.

본 연구는 복령 균사체 발효 쌀의 첨가가 된장 발효에 미치는 영향을 확인하고자 수행되었다. 복령 균사체 발효쌀을 이용한 된장을 시판하기 위해서는 15%를 첨가하는 것이 가장 적합하였으며, 90일 동안 숙성시킨 된장의 총 유리 아미노산의 함량은 1,889.17 mg%로 분석되어 대조구에 비해 증가하였다. 복령 균사체 발효 쌀의 필수아미노산은 7종이 분석되었으며, 일반 쌀과 비교했을 때 lysin, threonine, valine, methionine, isoleucine, leucine 및 phenylalanine 등의 필수아미노산 성분이 증가하는 경향을 나타내었다. 복령 균사체 발효 쌀을 첨가한 된장의 비타민 함량을 조사한 결과 비타민A는 7.47 RE, 비타민 D는 0.45 mg, 비타민 E는 5.73 mg이 검출되었으며, 대조구에서는 이들 비타민이 검출되지 않아 뚜렷한 차이가 있었다. 그리고 복령균사체 첨가 된장의 전자공여능은 열수와 에탄올 추출에 있어 각각 73.8%와 76%로 높은 활성을 나타내었다. 아질산염 소거능은 에탄올 추출물이 열수 추출물에 비해 높았으며, 복령균사체 발효 쌀을 에탄올 추출한 실험구가 가장 높은 아질산염 소거능을 나타내었다.

Keywords

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