Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Fermentation and Quality Characteristics of Cheonggukjang with Chinese Cabbage

배추 첨가 청국장의 제조 및 품질특성

  • Kim, Jin Hak (Dept. of Food Science and Technology, Catholic University of Daegu) ;
  • Park, La Young (Dept. of Food Science and Technology, Catholic University of Daegu) ;
  • Lee, Shin Ho (Dept. of Food Science and Technology, Catholic University of Daegu)
  • 김진학 (대구가톨릭대학교 식품가공학과) ;
  • 박나영 (대구가톨릭대학교 식품가공학과) ;
  • 이신호 (대구가톨릭대학교 식품가공학과)
  • Received : 2012.06.11
  • Accepted : 2012.08.10
  • Published : 2012.10.30
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Abstract

The fermentation and quality characteristics of Cheonggukjang with Chinese cabbage, which is produced as a by-product in the kimchi industry, were investigated. Cheonggukjang was prepared with cooked soybean without Chinese cabbage (control), with 10% Chinese cabbage (A10), and with 20% Chinese cabbage (A20), respectively. The A10 and A20 pH values did not show a significant difference compared with the control during fermentation for 72 h. The total aerobes of the Cheonggukjangs reached 8.65 (control), 8.73 (A10), and 9.11 (A20) log CFU/mL after fermentation for 72 h at $37^{\circ}C$, respectively. The numbers of lactic acid bacteria were found to be 5.62 (A10) and 5.87 (A20) log CFU/mL during fermentation for 72 h at $37^{\circ}C$, but lactic acid bacteria were not detected in the control. The amino nitrogen and viscous substance contents of A10 and A20 were lower than those of the control. The total polyphenol contents and DPPH radical scavenging abilities of the tested Cheonggukjang were increased by fermentation. The increasing ratio of polyphenol and the DPPH radical scavenging ability of A10 were higher than those of the control and of A20. The sensory quality of A10 was higher than that of the control and of A20 in taste, color, and overall acceptability.

김치 제조과정 중 발생되는 배추 부산물의 활용방안을 모색하기 위해 청국장의 제조시 배추를 첨가하여 배추 혼합 청국장의 발효 및 품질 특성을 비교 검토하였다. 배추 첨가량을 달리하여 10%(A10), 20%(A20) 혼합하여 제조한 청국장의 발효 및 품질특성을 조사한 결과, 배추 첨가 청국장의 pH는 발효 전 기간 동안 대조구보다 낮았으며, 배추 첨가량에 따라서는 큰 변화가 없었다. 청국장의 발효 후 총균수는 8.65~9.11 log CFU/mL이었으며, 유산균수는 A10, A20이 각각 5.62 log CFU/mL와 5.87 log CFU/mL이었으며, 대조구는 발효 전 기간 동안 유산균이 검출 되지 않았다. 배추 혼합 청국장의 아미노태 질소량과 점질물량은 발효 전 기간 동안 대조구보다 낮았다. 총 폴리페놀 함량은 발효 후 모든 군이 증가하였으며, A10의 증가량이 가장 우수하였다. DPPH radical 소거능은 발효 후 A10이 대조구와 A20보다 높은 활성을 나타내었다. 관능검사 결과는 A10이 맛, 색상, 종합적 기호도에서 가장 우수하였다.

Keywords

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