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Comparison of the Quality Characteristics of Radish by Soaking Using Sun-dried Salt and Leuconostoc starter

무 절임 제조 시 천일염과 스타터 첨가에 따른 품질특성 비교

  • Na, Jong-Min (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA) ;
  • Jin, Yong-Xie (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA) ;
  • Kim, Se-Na (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA) ;
  • Kim, Jung-Bong (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA) ;
  • Cho, Young-Suk (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA) ;
  • Kim, Kwang-Yup (Department of Food Science and Technology, Research Center for Bioresource and Health, Chungbuk National University) ;
  • Kim, Haeng-Ryan (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA) ;
  • Kim, So-Young (Functional Food & Nutrition Division, Department of Agrofood Resources, National Academy of Agricultural Sciences(NAAS), RDA)
  • 나종민 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 김영섭 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 김세나 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 김정봉 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 조영숙 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 김광엽 (충북대학교 식품공학과) ;
  • 김행란 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 김소영 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과)
  • Received : 2012.06.14
  • Accepted : 2012.11.04
  • Published : 2012.12.30

Abstract

In this study, the effects of the use of a starter on radish soaked at $4^{\circ}C$ for 28 days using two kinds of domestic sun-dried salt (white and gray salt) were determined. As a result, the moisture contents of the radish soaked with white and gray salt were 7.93 and 4.50%, respectively. The salinity levels were found to be equal (90%). No significant difference was found between the two groups in terms of the mineral contents of the salts therein ($37812.41{\pm}1922.95$ and $39755.13{\pm}1205.70$ mg/100 g, respectively). However, iron and zinc contents of gray salt were higher than those of white salt while the calcium, potassium, and magnesium contents were lower than those of white salt. After the addition of the starter, the sugar content increased, the pH decreased, and the total acidity rapidly decreased compared with the non-starter group during fermentation. The total microorganism count of the two groups increased during the fermentation period of 28 days. From the initial fermentation for 7 days, the lactic acid bacteria in the non-starter group increased while those in the leuconostoc starter group steadily increased within the whole fermentation period. The Leuconostoc spp. in non-starter group increased, but that in the starter group decreased to pH 4.0 on day 14.

본 연구는 국내산 천일염(장판염, 토판염)의 성분 비교와 이를 이용하여 무 절임을 제조할 때 첨가한 스타터와 함께 발효기간 동안의 변화를 알아보고자 수행하였다. 그 결과 두 소금간의 일반성분 중 수분함량은 차이를 보였지만 회분 함량은 그룹간의 차이를 보이지 않아, 생산시기가 동일한 점을 고려할 때 천일염 생산방식에 따른 차이라고 판단된다. 이들의 무기성분 함량은 소금의 주성분인 Na 함량은 큰 차이를 보이지 않았고, Ca, K 그리고 Mg 함량은 장판염이 높게 측정된 반면, Fe 그리고 Zn 함량은 토판염이 높게 측정되었지만, Ca 함량을 제외하고 크게 차이를 보이지 않았다. 천일염의 당도 측정 결과 10.70 Brix로 높은 함량을 나타내어 어떤 종류의 당으로 구성되었는지에 대한 정성 분석 연구가 요구된다. 무 절임 중 천일염과 스타터 첨가에 의한 발효 변화를 관찰하였을 때 스타터를 첨가한 그룹이 스타터를 첨가하지 않은 그룹보다 활발하게 유리당, 유기산 등 2차 대사산물을 생성하여, 우점종으로서 초기 미생물 조절에 영향을 끼쳤다고 판단된다. 그리하여 실험에 사용된 Leuconostoc mesenteroides B-512F 균주의 스타터 첨가가 발효과정 중 미생물 균총 변화에 큰 영향을 주므로, 발효 식품 제조 시 초기미생물 조절자로서의 명확한 역할 구명이 필요할 것으로 생각된다.

Keywords

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