한국식품과학회지 (Korean Journal of Food Science and Technology)

한국식품과학회 (Korean Society of Food Science and Technology)
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홍게 가공부산물의 효소적 단백질 가수분해 최적화

Enzymatic Hydrolysis Optimization of a Snow Crab Processing By-product

  • 장종태 (단국대학교 식품공학과) ;
  • 서원호 (단국대학교 식품공학과) ;
  • 백형희 (단국대학교 식품공학과)
  • Jang, Jong-Tae (Department of Food Engineering, Dankook University) ;
  • Seo, Won-Ho (Department of Food Engineering, Dankook University) ;
  • Baek, Hyung-Hee (Department of Food Engineering, Dankook University)
  • 발행 : 2009.12.31
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초록

홍게 가공부산물을 고부가가치 식품소재로 이용하기 위하여 단백질 분해효소를 이용하여 가수분해하고 반응표면분석법으로 가수분해 조건을 최적화 하였다. 홍게 가공부산물을 단백질 분해 효소인 Flavourzyme으로 가수분해한 결과 효소반응곡선은 반응 초기 빠른 반응속도를 나타내다가 이 후에 느려지는 전형적인 형태를 나타내었다. 반응초기 90분까지 가수분해도는 30%까지 증가하다가, 이후 최종적으로 32-36%를 나타내었다. 최적화를 하기 위한 가수분해 요인변수로는 반응온도, 반응시간 및 홍게 가공부산물에 대한 Flavourzyme의 양을 선정하였고, 5개의 수준에서 부호화하여 이들을 중심합성설계법을 이용하여 반응표면분석을 실시하였다. 홍게 가공부산물을 Flavourzyme을 이용하여 반응표면 분석법으로 가수분해 조건을 최적화한 결과, 온도 $51.8^{\circ}C$, 반응시간 4시간 45분, 홍게 가공부산물에 대한 Flavourzyme의 양 3.8%로 나타났다. 홍게 가공부산물 효소분해물은 향미소재 및 반응향 제조의 전구물질로서 이용할 수 있을 것이다.

The objectives of this study were to evaluate a protease suitable for the enzymatic hydrolysis of a snow crab processing by-product (SPB) and to optimize the hydrolysis conditions using response surface methodology (RSM). The SPB was hydrolyzed at $50^{\circ}C$ and pH 7.0-7.2 to obtain various degree of hydrolysis (DH) using Flavourzyme at an enzyme/substrate (E/S) ratio of 3.0%. The reaction progress curve exhibited an initial fast reaction rate followed by a slowing of the rate. The DH was increased to 30% at 90 min with a final DH 32 to 36%. A central composite experimental design having three independent variables (reaction temperature, reaction time, and E/S ratio) with five levels was used to optimize the enzymatic hydrolysis conditions. Based on the DH data, the optimum reaction conditions for the enzymatic hydrolysis of the SPB were a temperature of $51.8^{\circ}C$, reaction time of 4 hr 45 min, and an E/S ratio of 3.8%. It was demonstrated that the enzymatic hydrolysate of SPB could be used as a flavoring agent or a source of precursors for the production of reaction flavors.

키워드

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