Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Quality characteristics of low salted garlic Doenjang during fermentation

저염 마늘된장의 숙성기간에 따른 품질특성

  • 조계만 (경남과학기술대학교 식품과학부) ;
  • 강재란 ((재)남해마늘연구소) ;
  • 김경민 ((재)남해마늘연구소) ;
  • 강민정 ((재)남해마늘연구소) ;
  • 황정은 (경남과학기술대학교 식품과학부) ;
  • 정영심 (경남과학기술대학교 식품과학부) ;
  • 김정환 (경상대학교 식품공학과.농업생명과학연구원) ;
  • 이창권 (몽고식품(주)) ;
  • 신정혜 ((재)남해마늘연구소)
  • Received : 2014.05.13
  • Accepted : 2014.08.18
  • Published : 2014.10.30
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Abstract

We investigated the changes in the quality characteristics of Doenjang with low salt contents (6, 8, 10, and 12%) and 10% garlic. The Doenjang was analyzed at an interval of a week during its fermentation for six weeks, at room temperature. Its L color gradually decreased, but its a and b colors did not change significantly. Its salinity increased by about 1% after six weeks. In contrast, immediately after its preparation, its pH was gradually decreased and its acidity was increased for the fermentation. The reducing sugar was significantly increased from 1.34~1.88 g/100 g immediately after its preparation to 7.25~9.13 g/100 g after six weeks, which was higher as the salt concentration decreased. The amino-type nitrogen doubled from 100~130 mg% at 0 week to 210~290 mg% at six weeks, which were lower with the higher salt concentrations. The growth curve of the Bacillus fermentation strains of Doenjang increased to two weeks but gradually decreased since, and the growth of the Bacillus was favorable for up to two weeks in the Doenjang with 10% and 12% salt added. Otherwise, the yeast was reduced rapidly during the early fermentation of the Doenjang, and slightly changed after three weeks of fermentation. The results of this study showed that the reducing sugar and amino-type nitrogen contents of the low-salt garlic Doenjang were higher with the lower salt dose, and the physicochemical quality of the 6%-salt Doenjang was not significantly affected. Thus, we suggest that low-salt Doenjang can be manufactured with the addition of 6% salt and 10% garlic.

분쇄한 생마늘 10%와 식염을 6, 8, 10 및 12%로 달리하여 저염 마늘 된장을 제조하고, 상온에서 6주간 숙성시키면서 일주일 간격으로 시료를 취하여 숙성기간에 따른 품질 특성의 변화를 분석하였다. 숙성 시간이 경과할수록 명도는 감소하였으나, 적색도와 황색도는 유의적인 변화의 경향이 없었다. 염도는 된장 제조 직후에 비해 숙성 6주차에 1% 정도씩 증가하였으며, pH는 저장기간이 경과할수록 점차 감소하였으며, 산도는 이와 상반되게 증가되는 경향이었다. 환원당은 숙성기간의 경과와 더불어 유의적으로 증가하여 된장 제조 직후에 1.34~1.88 g/100 g이던 것이 숙성 6주차에는 7.25~9.13 g/100 g으로 변화하였는데, 식염의 첨가 농도가 낮을수록 환원당의 함량이 더 높았다. 아미노태 질소는 100~130 mg%에서 숙성 6주차에는 210~290 mg%로 약 2배 증가하였는데, 식염의 첨가 농도가 높을수록 아미노태질소의 함량은 더 낮았다. 된장의 발효 균주인 Bacillus 균주의 생육은 숙성 14일까지 증가되다가 그 이후부터는 감소되는 경향이었는데, 식염 10%와 12% 첨가군에서는 숙성 14일까지 Bacillus 균주의 생육이 양호하였다. 반면 효모는 된장의 숙성 초기에 급격히 감소하였으며, 숙성 21일 이후에는 일정범위를 유지하여 큰 변화는 없었다. 이상의 결과를 종합하여 볼 때 마늘이 첨가된 저염 된장은 염농도가 낮을수록 환원당이나 아미노태 질소의 함량이 더 높았고, 이화학적인 품질에도 크게 영향을 받지 않아 6% 정도의 식염첨가로 저염화가 가능할 것으로 확인되었다.

Keywords

References

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