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Changes in Enzyme Activity and Sensory Characteristics of Kochujang with Different Ratios of Added Deoduk (Codonopsis lanceolata) Root Powder

더덕 분말 첨가량을 달리한 고추장의 효소력 변화 및 관능적 특성

  • Sung, Jung-Min (Korea Food Research Institute) ;
  • Kim, Ok-Sun (Dept. of Food Nutrition, Jangan University) ;
  • Ryu, Hye-Sook (Dept. of Food and Nutrition, College of Health Sciences, Sangji University)
  • 성정민 (한국식품연구원) ;
  • 김옥선 (장안대학교 건강과학부 식품영양학과) ;
  • 류혜숙 (상지대학교 보건과학대학 식품영양학과)
  • Received : 2011.05.17
  • Accepted : 2011.07.25
  • Published : 2011.08.31

Abstract

Deoduk (Codonopsis lanceolata) root powder was added to traditional kochujang to improve the quality of traditional kochujang. The microbial characteristics, enzyme activities, and sensory characteristics were investigated during fermentation. The aerobic bacterial count in kochujang was not remarkabley different, and yeast and mold decreased during fermentation. Yeast and mold in the kochujang with 3 and 5% added deoduk root powder were 5 log scale at 8 weeks, whereas those in the control reached the same level at 6 weeks. ${\alpha}$, ${\beta}$-Amylase activity was at its highest level at 4 weeks during fermentation, and glucose and fructose contents showed the same results. The major free sugars in kochujang were glucose and fructose, and their contents increased rapidly at 2 weeks. Free sugar contents of kochujang with added deoduk was higher than that in the control. The sensory evaluation results showed that 1 and 3% deoduk kochujang had higher scores for taste and overall acceptance than those in the control. In particular, 1% deoduk kochujang had the highest scores.

본 연구는 맛과 기능성을 향상시키기 위해 더덕 분말 첨가량을 달리하여 고추장을 제조하여 숙성 중 효소활성의 변화 및 관능평가를 실시하였다. 더덕분말 함량은 1%, 3%와 5%로 달리 첨가하여 30$^{\circ}C$에 보관하면서 2주 간격으로 pH, 미생물, 유리당, 효소활성 및 관능 등의 품질을 평가하였다. 초기 pH는 더덕 첨가구가 대조구에 비해 낮았으며 저장기간 동안 감소하였다. 총균수는 저장기간 동안 큰 변화를 나타내지 않았으며 효모 및 곰팡이균은 증가하였다. 대조구와 1% 첨가구의 효모 및 곰팡이균수는 저장 6주째 5 log scale에 도달한 반면 3%, 5% 첨가구는 저장 8주째에 같은 수준에 도달하였다. 전분분해 효소인 amylase는 저장 4주째 활성이 가장 높았으며 glucose와 fructose 함량도 4주째 가장 높게 나타났다. 유리당 함량 결과 glucose와 fructose가 대부분을 차지하였으며 glucose 함량은 저장 2주째 급격하게 증가하였고 4주째 최고치에 달했으며 대조구에 비해 더덕분말 첨가 고추장의 유리당 함량이 유의적으로 높게 나타났다. 관능평가 결과 맛 및 종합적인 기호도는 1, 3% 첨가구가 대조구에 비해 높게 나타났으며 첨가구들 가운데 1% 첨가구를 가장 선호하는 것으로 나타났다.

Keywords

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