Journal of Applied Biological Chemistry

  • 제58권2호
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  • Pages.145-151
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  • 2015
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  • 1976-0442(pISSN)
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  • 2234-7941(eISSN)
한국응용생명화학회 (The Korean Society for Applied Biological Chemistry)
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녹차 추출물을 함유한 옥피 단백질 필름의 특성

Characterization of a Corn Fiber Protein Film Containing Green Tea Extract

  • Yang, Hyun-Ju (Department of Food Science and Technology, Chungnam National University) ;
  • Lee, Ji-Hyun (Department of Food Science and Technology, Chungnam National University) ;
  • Lee, Ji-Hyeon (Department of Food Science and Technology, Chungnam National University) ;
  • Song, Kyung Bin (Department of Food Science and Technology, Chungnam National University)
  • 투고 : 2015.01.12
  • 심사 : 2015.03.11
  • 발행 : 2015.06.30
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초록

옥수수의 습식 분쇄 공정 중 나오는 부산물인 옥피로부터 옥피 단백질(CFP)을 추출하였다. 다양한 가소제와 가교제를 첨가하여 CFP 필름을 제조한 후, 필름의 물성을 측정하였다. 본 연구에서 사용된 가소제와 가교제 중, 2 g fructose와 0.03% cinnamaldehyde를 첨가한 필름이 가장 좋은 물성을 가졌다. 또한 여러 농도(0, 0.5, 1.0, 1.5%)의 녹차 추출물(GTE)을 첨가한 CFP 필름을 제조하였다. GTE의 농도가 증가함에 따라 CFP 필름의 인장강도, 수분 용해도, 불투명도는 증가하였고, 반면에 신장률과 필름의 수분투과도는 대조구에 비해 감소하였다. GTE 첨가한 CFP 필름의 항산화성은 DPPH 소거능으로 측정하였는데, GTE 농도가 증가함에 따라 증가하였다. 그리고 E. coli O157:H7, L. monocytogenes, S. aureus 에 대한 항균성 실험을 한 결과 또한 GTE 농도가 증가함에 따라 증가하였다. 따라서 본 연구 결과, GTE 첨가는 CFP 필름의 항산화, 항균효과를 가져다 준다고 판단된다.

Corn fiber protein (CFP) was extracted from corn wet-milling by-product, corn fiber. CFP films containing various plasticizers and cross-linking agents were prepared and their mechanical properties were determined. Among the plasticizers and cross-linking agents used in this study, the CFP film containing 2 g fructose and 0.03% cinnamaldehyde had the most appropriate physical property. In addition, the CFP films containing green tea extract (GTE) were prepared by incorporating different amounts (0, 0.5, 1.0, 1.5%) of GTE into the film-forming solution. Tensile strength, film solubility, and opacity of the CFP films increased with the addition of GTE, whereas elongation and water vapor permeability of the CFP/GTE films decreased compared to those of the control. The antioxidant activity of the CFP/GTE film was determined in terms of 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity. As a result, antioxidant activity of the films increased with increasing GTE concentration. Furthermore, antimicrobial activity against Escherichia coli O157:H7, Listeria monocytogenes, and Staphylococcus aureus increased with increasing GTE concentration. These results indicate that the incorporation of GTE could enhance antioxidant and antimicrobial activities of the CFP films.

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