Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Characteristic of Glasswort (Salicornia Herbacea L.) Mixture Fermentation Utilizing Aspergillus oryzae

황국균을 이용한 퉁퉁마디(Salicornia herbacea L.) 혼합물의 발효 특성

  • 김해섭 (전라남도 해양바이오연구원) ;
  • 박인배 (전라남도 해양바이오연구원) ;
  • 이영재 (전라남도 해양바이오연구원) ;
  • 신궁원 (전라남도 해양바이오연구원) ;
  • 임주영 (전라남도 해양바이오연구원) ;
  • 박정욱 (전라남도 해양바이오연구원) ;
  • 조영철 (전라남도 해양바이오연구원)
  • Received : 2010.05.20
  • Accepted : 2010.06.24
  • Published : 2010.09.30
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Abstract

In this study, we investigated the quality of glasswort (Salicornia herbacea L.) mixture fermented by Aspergillus oryzae at $30^{\circ}C$ for 7 days. Changes of pH, titratable acidity, amino-nitrogen content, reducing sugar content, activities of $\alpha$-amylase and protease and number of mold were determined in the course of the fermentation. Angiotensin converting enzyme (ACE) inhibition activities and electron donating ability (EDA) were measured after 7 days fermentation. The pH lowered from 6.19~6.22 into the level of 5.41~6.08 after fermentation for 7 days. Titratable acidity increased from 0.59~0.68 into the highest level of 0.95~1.13% after 6 days fermentation. Furthermore, the amino-nitrogen content increased from 128.0~167.2 mg% to 159.4~209.0 mg% after fermentation for 7 days. For the reducing sugar content, it decreased from 2.0~5.9% into the level of 0.4~1.1% during 7 days fermentation. The number of molds decreased from $10^7\;CFU/g$ to approximately $10^6\;CFU/g$ after 5 days fermentation. $\alpha$-Amylase activity showed from the beginning of the fermentation in all samplings, but protease activity reached the value of food code standards after 5 days of fermentation. ACE inhibition activities were slightly increased from 9.5~16.6% to 19.3~22.7% and electron donating ability were slightly increased from 55.6~57.8% to 60.9~62.7% after 7 days of fermentation.

본 연구에서는 퉁퉁마디에 미강, 대두, glucose 및 starch의 첨가비를 달리 조절하고 이에 황국균을 접종하여 $30^{\circ}C$에서 7일간 발효시켰다. 발효 진행에 따른 pH, 적정산도, 아미노태질소, 환원당, $\alpha$-amylase 활성, protease 활성 및 곰팡이수의 변화를 조사하고 최종 발효물의 angiotensin converting enzyme 저해능과 전자공여능(electon donating ability)을 비교하였다. pH는 초기 6.19~6.22에서 발효 7일 경과 후에는 5.41~6.08로 낮아졌으며, 적정 산도는 초기 0.59~0.68%에서 발효 6일 경과 후 최고 수준인 0.95~1.13%로 증가하였다. 또한, 아미노태질소는 초기 128.0~167.2 mg%에서 발효 7일 경과 후 159.4~209.0 mg%로 증가하였으며, 환원당은 초기 2.0~5.9%에서 발효 7일 경과 후 0.4~1.1%로 감소하였다. 곰팡이수는 초기 $10^7\;CFU/g$에서 발효 7일 경과 후 약 $10^6\;CFU/g$ 가량으로 감소하였다. $\alpha$-amylase 활성은 모든 시험구가 발효 초기부터 활성이 나타났으며 protease 활성은 발효 5일 이후부터 식품공전 규격을 충족시켰다. 또한, 본 연구에서 실시한 시험조건 모두 발효 전에 비해 발효 7일 경과 후 ACE 저해활성과 전자공여능이 증가하였다.

Keywords

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