Journal
JOURNAL OF FOOD PROCESSING AND PRESERVATION
Volume 38, Issue 4, Pages 1973-1981Publisher
WILEY-HINDAWI
DOI: 10.1111/jfpp.12173
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The objective of this work was to evaluate the mechanical, barrier and morphological properties of biodegradable films based on muscle and residue proteins from the Whitemouth croaker (Micropogonias furnieri). Protein isolate was obtained from croaker residue and myofibrillar proteins were obtained from croaker muscle. The films made with fish protein were evaluated for color parameters, opacity, mechanical properties, thickness, water solubility, water vapor permeability and morphological properties. The films were prepared by technical casting with various fish protein suspensions (3.0, 4.0 and 5.0% weight in solution). The films made with residue protein isolate (RPI) presented higher solubility than the films made with muscle myofibrillar protein (MMP). For the MMP films, the lowest protein concentration showed a lower tensile strength compared with higher concentrations of proteins. The films produced with higher protein concentration had higher water vapor permeability. Also, the RPI films had a rougher surface than the MMP films.
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