Grouper bone gelatin films were prepared along with chitosan (GC), clove (GL), and pepper (GP) essential oils and examined for their mechanical, barrier, and antimicrobial properties. GC films had a high tensile strength (TS) of 28 MPa, and GL and GP films had a high elongation at break (EAB) of 162 and 166%, respectively. Water solubility and water vapor transmission rate (WVTR) were low in GL films. All the films exhibited inhibitory activities against Staphylococcus aureus, Aeromonas hydrophila, and Listeria monocytogenes. Vacuum-packed fish steaks coated with GC and GL film extended the shelf life from 4 days to 8 days at 4ºC.
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Shakila et al. (2015) studied this question.
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