Changes of Characteristics in Kochujang Fermented with Maesil (Prunus mume) Powder or Concentrate

매실분말 및 농축액을 첨가한 고추장의 숙성중 품질 변화

  • Park, Woo-Po (Division of Food Science, Masan College) ;
  • Cho, Sung-Hwan (Department of Food Science and Technology & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Lee, Seung-Chul (Division of Food Science and Biotechnology, Kyungnam University) ;
  • Kim, Sung-Yong (Department of Agricultural Economics, Gyeongsang National University)
  • 박우포 (마산대학 식품과학부) ;
  • 조성환 (경상대학교 식품공학과 및 농업생명과학연구원) ;
  • 이승철 (경남대학교 식품생명공학부) ;
  • 김성용 (경상대학교 농업경제학과)
  • Published : 2007.08.28

Abstract

Powder, or a concentrate, of maesil (Prunus mume) were used in the making of kochujang, and were added to kochujang at 0.5 or 1.0% (w/w). Kochujang fermented with maesil powder lower moisture content than did samples fermented with maesil concentrate. Moisture content slowly increased during fermentation, and was $3{\sim}4%$ higher than the initial value after 8 weeks of fermentation. Kochujang fermented with maesil powder or maesil concentrate showed lower pH values and higher total acidities than did the control. The total microbial count was $3.6{\times}10^7\;5.4{\times}10^7\;cfu/g$, and yeast and mold levels were $2.0{\times}10^7{\sim}3.6{\times}10^7\;cfu/g$, as kochujang fermentation commenced. Microbial load reached a maximum by 4 weeks of fermentation, and decreased thereafter. L (lightness), a (redness) and b (yellowness) values of kochujang gradually decreased during fermentation. Compared to methanol extracts of kochujang, water extracts and ethanol extracts showed higher free radical scavenging abilities at the initial stage of fermentation. Control, and samples with 0.5% (w/w) maesil powder or maesil concentrate, attained higher scores in sensory evaluation tests than did samples with higher maesil levels, and were not significantly different at P>0.05 as determined by Duncan's multiple range test.

매실분말과 매실농축액을 각각 첨가한 고추장을 만들고 숙성하면서 품질 변화를 고찰한 결과 숙성 기간이 경과함에 따라 모든 시험구의 수분 함량이 대체적으로 증가하였으며, 숙성 8주에는 고추장 담금시에 비하여 $3{\sim}4%$ 정도 높았다. 매실분말과 매실농축액을 첨가한 시험구의 pH는 각각의 대조구보다 낮았으며, 첨가량이 많을수록 더 낮은 값을 나타내었다. 고추장이 숙성되어감에 따라 모든 시험구의 pH는 점차 낮아졌으나 대조구와 매실분말 및 매실농축액 첨가구 사이의 pH 차이는 숙성 8주까지 유지되었다. 고추장 담금 직후의 총균수는 $3.6{\times}10^7\;{\sim}\;5.4{\times}10^7\;cfu/g$였으며, 효모 및 곰팡이는 $2.0{\times}10^7\;{\sim}\;3.6{\times}10^7\;cfu/g$였다. 숙성 기간 중 L, a, b값이 대체적으로 감소하는 것으로 나타났으나 숙성 8주를 기준으로 했을 때 매실농축액 1.0% 첨가구의 L값을 제외하면 대조구와 큰 차이를 나타내지 않았다. 고추장 담금 직후 물 추출물과 에탄올 추출물이 나타내는 유리 래디칼 소거능은 메탄올 추출물보다 높았으며, 숙성기간에 따라 에탄올 추출물의 유리 래디칼 소거능은 감소하였다. 6주간 숙성한 고추장의 관능검사 결과 색도에 대한 점수는 대조구 1, 매실분말 0.5%, 매실농축액 0.5% 첨가구 순이었으며, 매실농축액 1.0% 첨가구를 제외한 모든 시험구는 유의적인 차이가 없었다. 그러나 맛은 매실분말 및 매실농축액 1.0% 첨가구가 다른 시험구에 비하여 낮은 점수를 받았고, 유의적인 차이를 나타내었다.

Keywords

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