Characterization of a Corn Fiber Protein Film Containing Green Tea Extract

Hyun-Ju Yang, Ji-Hyun Lee, Ji-Hyeon Lee, Kyung Bin Song
2015 Journal of Applied Biological Chemistry  
Corn fiber protein (CFP) was extracted from corn wetmilling 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
more » ... 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. Keywords antimicrobial property · corn fiber · green tea extract · protein film 서 론 식품의 저장, 유통 중 품질을 유지시키고 외부 환경에 대한 식 품의 오염을 막는 역할을 하는 식품 포장재의 대부분은 플라스 틱으로 생분해가 되지 않아 환경오염의 원인이 되기에(Lim 등,
doi:10.3839/jabc.2015.025 fatcat:otevozzxmjc27cwaz3athp4gum