Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effects of a Carbohydrase Mixture, Ultrasound, and Irradiation Treatments on the Physical Properties of Defatted Mustard Meal-based Edible Films

탈지 겨자씨로 제조한 가식성 생고분자 필름의 물리적 특성에 대한 탄수화물 가수분해 효소 혼합체, 초음파, 그리고 방사선 처리의 효과

  • Yang, Hee-Jae (Department of Food Science and Technology, Seoul Women's University) ;
  • Noh, Bong-Soo (Department of Food Science and Technology, Seoul Women's University) ;
  • Kim, Jae-Hun (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Min, Sea-C. (Department of Food Science and Technology, Seoul Women's University)
  • 양희재 (서울여자대학교 식품공학) ;
  • 노봉수 (서울여자대학교 식품공학) ;
  • 김재훈 (한국원자력연구원 방사선 과학연구소) ;
  • 민세철 (서울여자대학교 식품공학)
  • Received : 2010.11.01
  • Accepted : 2011.01.17
  • Published : 2011.02.28
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Abstract

Effects of depolymerization treatments of a carbohydrase mixture (CM), ultrasound, and irradiation on the physical properties of defatted mustard meal-based edible films (DMM films) were investigated. DMM hydrocolloids were added to CM (0.42% (w/w solution)), treated by ultrasound (500-700 W, 10-30 min) or ${\gamma}$-ray (40-100 kGy) to prepare film-forming solutions. Films were formed by drying. The CM treatment at 0.42% (w/w), pH 5.5, and 40-$50^{\circ}C$ with a 0.5 hr incubation time resulted in the highest colloidal stability in the film-forming solution. The depolymerization treatments did not dramatically change the water vapor permeability of the films. The solubility of the film decreased up to 53.1% by the CM treatment. The ultrasound treatment (700 W-30 min) decreased tensile strength and elongation. The ultrasound treatment (600 W-20 min) resulted in more compact and uniform structures of the films. Flavor profiles were differentiated by the power level and the time of the ultrasound treatment.

대부분의 고분자 분쇄 처리는 WVP에 영향을 주지 않았고, 일부 조건에서 WS를 개선시켰으나 그 개선 정도가 변수 크기와 직접적으로 관계되지 않았다. 인장특성의 경우에도 대부분의 처리들에 의해 개선되지 않았으며, 초음파 처리의 경우에는 오히려 인장특성을 저하시키기도 하였다. 고분자 분쇄가 DMM 필름의 특성에 영향을 미칠 것이라고 가설을 세웠지만 향 프로파일을 제외한 DMM 필름의 특성들이 본 연구에서 사용된 조건에서의 고분자 분쇄 처리에 의해 대체적으로 크게 영향을 받지 않았다. 또한 필름의 물리적 특성의 변화에 미치는 그 영향 정도가 고분자 분쇄의 공정 변수 크기에 의해 결정될 것이라고 예상했지만, 초음파와 방사선으로 처리된 탈지 겨자씨 필름은 공정 변수의 크기와 필름의 특성들 간에 상관관계가 없었다는 것을 알아내었다. 이것은 아마도 순수한 단일 생고분자로 구성된 필름의 고분자 네트워크와 복합 생고분자로 구성된 농산물 가공 부산물인 탈지 겨자씨 필름의 고분자 네트워크의 차이 때문이라고 사려된다. 이 연구의 결과를 통해 단일 생고분자 필름의 특성 개선을 위해 사용되는 고분자 분쇄 기술과 처리 변수들의 값들이 복합 생고분자인 탈지 겨자씨 필름에는 그 필름의 특성 개선에 효율적으로 적용되지 않는다는 것이 규명되었다. 이 결과는 다른 복합 생고분자(농산물 가공 부산물)로 가식성 필름을 제작 시 본 연구에 사용된 고분자 분쇄 처리들이 그 필름의 물리적 특성들을 개선하는데 효과적이지 않을 수 있다는 가능성을 말해주기도 한다. 차후 탈지 겨자씨 필름의 특성을 개선하기 위해서 다른 고분자분쇄 기술(예, high pressure homogenization)을 이용해보거나 composite 필름을 제조할 수 있을 것이다.

Keywords

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