Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effect of various additives on reduction of unpleasant odor and inhibition of Bacillus cereus growth in cheonggukjang

다양한 첨가제에 의한 청국장 불쾌취 및 Bacillus cereus 증식의 억제

  • Jeong, Su-Hyeon (Department of Food Science and Technology, Chonbuk National University) ;
  • Park, Song-Yie (National Institute of Crop Science) ;
  • Jeong, Eun-Seon (Jeonbuk Institute for Food-Bioindustry) ;
  • Kim, Yong-Suk (Department of Food Science and Technology, Chonbuk National University) ;
  • Mun, Sung Phil (Department of Wood Science and Technology, Chonbuk National University)
  • Received : 2016.06.27
  • Accepted : 2016.08.09
  • Published : 2016.12.31
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Abstract

The effectiveness of various additives in reduction of an unpleasant odor and inhibition of Bacillus cereus growth in Cheonggukjang (CKJ) was investigated. Sensory evaluations of unpleasant odor intensity and taste preference for CKJ were conducted with a 5-point scale. Raw CKJ was rated to have the highest unpleasant odor intensity, followed by CKJ-salt, CKJ-wood vinegar salt, CKJ-red pepper seed oil, and CKJ-bamboo salt in the given order. The test panel had a greater preference for CKJ-red pepper seed oil than for the other CKJ products. The addition of bamboo salt to CKJ was the most effective in inhibition of B. cereus growth in comparison to the other three additives. Volatile compounds in CKJ and CKJ-bamboo salt were identified by GC/MS analysis. 1-Ethoxy-1-methoxy-ethane was responsible for the pleasant odor and its level significantly increased in CKJ-bamboo salt. Consequently, adding bamboo salt to CKJ not only masked and reduced the unpleasant odor, but also inhibited B. cereus growth in CKJ.

청국장의 불쾌취를 줄이고 B. cereus 증식을 억제하는데 다양한 첨가제의 효과를 검토하였다. 관능검사는 불쾌취와 맛에 대하여 각각 5점 척도법으로 실시하였다. 무첨가 청국장의 불쾌취 강도가 가장 높다고 평가되었으며, 소금 첨가구, 목초액 소금 첨가구, 고추씨기름 첨가구, 죽염 첨가구 순으로 높게 나타났다. 맛의 선호도는 고추씨기름 첨가 청국장이 다른 첨가구들보다 높았다. 각 첨가제들의 B. cereus 증식 억제 효과를 확인한 결과, 죽염이 다른 3개 첨가제에 비하여 그 효과가 가장 뛰어났다. 관능검사 결과 및 B. cereus 증식 억제 효과가 좋게 나타난 죽염 첨가 청국장과 무첨가 청국장의 냄새 성분을 추출, 농축하여 GC/MS로 분석하였다. 죽염 첨가 청국장에서 오렌지 유사 향인 1-ethoxy-1-methoxy-ethane이 무첨가구에 비해 크게 증가하였다. 결과적으로 죽염을 청국장에 첨가하는 것은 차폐에 의한 청국장의 불쾌취 감소뿐만 아니라 B. cereus 증식 억제에 효과적임을 확인하였다.

Keywords

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