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Optimal Fermentation Conditions for Processing of the Salt-Fermented Oysters in Olive Oil

기름담금 염장발효 굴의 가공을 위한 최적 염장발효조건

  • Kim, Seok-Moo (Division of Marine BioscienceㆍInstitute of Marine Industry, Gyeongsang National University) ;
  • Kang, Su-Tae (Faculty of Food Science and Biotechnology, Pukyong National University) ;
  • Kim, Young-A (Nongsusan Home Shopping) ;
  • Choe, Dong-Jin (Division of Marine BioscienceㆍInstitute of Marine Industry, Gyeongsang National University) ;
  • Nam, Gee-Ho (Division of Marine BioscienceㆍInstitute of Marine Industry, Gyeongsang National University) ;
  • Oh, Kwang-Soo (Division of Marine BioscienceㆍInstitute of Marine Industry, Gyeongsang National University)
  • 김석무 (경상대학교 해양생물이용학부ㆍ해양산업연구소) ;
  • 강수태 (부경대학교 식품생명공학부) ;
  • 김영아 (농수산홈쇼핑) ;
  • 최동진 (경상대학교 해양생물이용학부ㆍ해양산업연구소) ;
  • 남기호 (경상대학교 해양생물이용학부ㆍ해양산업연구소) ;
  • 오광수 (경상대학교 해양생물이용학부ㆍ해양산업연구소)
  • Published : 2004.10.01

Abstract

The optimal fermentation conditions for processing of the salt-fermented oysters in olive oil were examined. The penetration of salt into oyster meat was completed within 1 day after brine salting or dry salting. The amino nitrogen contents of salt-fermented oyster was increased slightly up to the 20th day during salt-fermentation at 5$\pm$1$^{\circ}C$. The hardness of the salt-fermented oysters was increased up to the 10th day, and then softened gradually by some parts of the tissue were hydrolyzed. The viable cell counts didn't change overall at the non-salt medium, but it was increased definitely up to the 15th day at the 2.5% salt medium during salt-fermentation. Based on the results of sensory tests, the salt-fermented oyster at 5$\pm$1$^{\circ}C$ for 15∼20 days showed the best flavorous condition. The optimal condition for the salt-fermented oyster in olive oil was to ripen at 5$\pm$1$^{\circ}C$ for 15 days by brine-salting in saturated saline solution-oyster sauce (2:1).

우리나라 전통수산발효식품 중의 하나인 굴 젓갈을 소재로 하여 장기간 상온저장이 가능하며, 생굴의 풍미를 지닌 기름담금 염장발효 굴 제품을 가공하기 위한 최적 염장발효 조건과 염장발효 중의 성분변화에 대하여 살펴보았다. 염장발효 중 식염의 침투는 염장 초기에 완료되었으며, 아미노질소량은 저온숙성 20일째까지 계속 증가하다가 이후 일정한 함량을 유지하였고, 굴 자숙농축액을 첨가한 시료가 아미노질소의 함량이 가장 많았다. 염장발효 굴의 경도는 숙성 10일째까지 증가하다가 그 이후는 육 조직의 일부가 가수분해됨에 따라 점차 육질이 연화되어 감소하는 경향을 보였다. 염장직후의 생균수는 무염배지 및 2.5% 가염배지에서 각각 1.0∼1.1${\times}$$10^2$CFU/g, 6.7${\times}$$10^2$CFU/g이었고, 저온숙성 중 무염배지에서는 생균수가 전반적으로 변화를 보이지 않았으나, 2.5% 가염배지에서는 숙성 15일째까지 생균수가 뚜렷이 증가하다가 이후 감소하는 경향을 보였다. 염장발효 굴은 맛과 냄새 및 종합적 기호도 면에서 저온숙성 15∼20일째에 가장 좋았으며, 굴 자숙농축액을 첨가하여 염장발효시킨 시료가 특히 맛과 향기 면에서 우수하였다. 이상의 결과를 종합하여 볼 때, 기름담금 염장발효 굴 제품을 가공하기 위한 최적 염장발효 조건은 탈각한 생굴을 3% 식염수로서 수세하여 물 빼기를 한 다음, 포화식염수와 굴 자숙농축액의 2:1 혼합용액에 대해 1% sodium erythorbate와 0.2% polyphosphate를 각각 첨가한 염장액으로 물간하여 5$\pm$1$^{\circ}C$에서 15일간 발효 숙성시키는 것이 가장 좋았다.

Keywords

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