Characterization and antimicrobial properties of food packaging methylcellulose films containing stem extract of Ginja cherry

Journal of the Science of Food and Agriculture
Débora CamposMaria M E Pintado

Abstract

Food contamination and spoilage is a problem causing growing concern. To avoid it, the use of food packaging with appropriate characteristics is essential; ideally, the packaging should protect food from external contamination and exhibit antibacterial properties. With this aim, methylcellulose (MC) films containing natural extracts from the stems of Ginja cherry, an agricultural by-product, were developed and characterized. The antibacterial activity of films was screened by the disc diffusion method and quantified using the viable cell count assay. The films inhibited the growth of both Gram-positive and Gram-negative strains (Listeria innocua, methicillin-sensitive Staphylococcus aureus, methicillin-resistant S. aureus, Salmonella Enteritidis, Escherichia coli). For the films with lower extract content, effectiveness against the microorganisms depended on the inoculum concentration. Scanning electron microscope images of the films showed that those containing the extracts had a smooth and continuous structure. UV-visible spectroscopy showed that these materials do not transmit light in the UV. This study shows that MC films containing agricultural by-products, in this case Ginja cherry stem extract, could be used to prevent ...Continue Reading

Citations

May 20, 2015·Journal of the Science of Food and Agriculture·Mariana S L FerreiraÉdira C B A Gonçalves
Jan 10, 2018·Frontiers in Microbiology·Lorenzo SiroliRosalba Lanciotti
Jul 20, 2017·Journal of the Science of Food and Agriculture·Ilda CaldeiraOfélia Anjos

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