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Mechanical Properties of a Gelidium corneum Edible Film Containing Catechin and Its Application in Sausages

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ABSTRACT: 

We prepared an edible Gelidium corneum (GC) film containing catechin and examined the microbial growth and quality change during storage of sausages packaged with the film. Incorporation of catechin in the film improved film tensile strength and water vapor permeability. The film's antimicrobial activity against Eschericha coli O157:H7 increased with increasing catechin concentrations and resulted in a decrease in the populations of the bacteria by 1.93 log CFU/g at 150 mg of catechin. For the sausage samples inoculated with E. coli O157:H7 and Listeria monocytogenes, the samples packed with the GC film showed a decrease in populations of E. coli O157:H7 and L. monocytogenes by 1.81 and 1.44 log CFU/g, respectively, compared to the control after 5 d of storage. In addition, the sausage samples packed with the GC film had lower degrees of lipid oxidation. The results suggest that sausages can be packed with GC film to extend shelf life.
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Keywords: Gelidium corneum film; catechin; sausages; storage

Document Type: Research Article

Affiliations: Authors are with Dept. of Food Science and Technology, College of Agriculture and Life Science, Chungnam Natl. Univ., Daejeon 305-764, Korea. Direct inquiries to author Song ( )., Email: [email protected]

Publication date: April 1, 2008

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