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Material Properties of Xanthan Coating Applied to Poly(lactic acid) Films and Antimicrobial Effects of Xanthan Coating Containing Bacteriophages

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Title: Material Properties of Xanthan Coating Applied to Poly(lactic acid) Films and Antimicrobial Effects of Xanthan Coating Containing Bacteriophages
Author: Guild, Brandon Michael
Department: Department of Food Science
Program: Food Science
Advisor: Loong-Tak, Lim
Abstract: Antimicrobial active packaging systems utilizing biobased materials are of growing research interest. A biobased film of xanthan coated PLA was developed and characterized. Viscosity and moisture sorption of the coating were evaluated, in addition to water permeability, thermal and surface properties of the coated film. Microscopic analyses indicated that repeatable coatings could be created using a draw-down casting approach. The addition of bacteriophage preparation to xanthan solution did not significantly affect water barrier or coating consistency on PLA films. The Listeria phage A511 and Salmonella phage were immobilized in xanthan coatings, and the antimicrobial activity of the xanthan-coated PLA films evaluated. Antimicrobial films were tested on cooked sliced turkey breast resulting in 1 to 2 log-reductions over the study period, with greater reduction in Listeria inoculated samples. The active packaging film can be applied as a separator or antimicrobial layer for sliced RTE meat products.
URI: http://hdl.handle.net/10214/10510
Date: 2017-06-01


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