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Advisor(s)
Abstract(s)
Bioactive food packaging is an innovative approach for the prevention of the growth of food-spoilage
microorganisms. Four active extracts from agroindustrial subproducts (Eucalyptus wood, almond shells,
corn cobs and grape pomace) with demonstrated antioxidant activity have been investigated for bestowing
antimicrobial activity to bioactive packaging. To carry out this evaluation, the antioxidant extracts were
tested against five food pathogenic bacteria, namely, Escherichia coli, Pseudomonas aeruginosa, Listeria
monocytogenes, Staphylococcus aureus and Salmonella spp. The results obtained showed that all the
tested extracts inhibited the growth of all five pathogenic bacteria. From the analysis of the minimal bactericidal
concentrations (MBCs), the Eucalyptus wood extract was the most active, being necessary only
2% (v/v) to inhibit Pseudomonas aeruginosa, Listeria monocytogenes, and Staphylococcus aureus,
whereas almond shells extract were less active requiring 4% (w/v) to inhibit the growth of Escherichia coli
and Pseudomonas aeruginosa and the extract from corn cobs was bactericidal against Escherichia coli
and Staphylococcus aureus at a concentration of 4% (w/v). After checking their antimicrobial activity, the
antioxidant extracts have been incorporated into sodium alginate films and the maintenance of their antimicrobial
properties was confirmed. This work showed that the antioxidant extracts from agroindustrial
byproducts exhibited antimicrobial activity and were suitable for incorporation into edible films that could
be used in bioactive packaging systems.
Description
Keywords
Pedagogical Context
Citation
MOREIRA, Diana; GULLON, Beatriz; GULLON, Patricia; GOMES, Ana M.; TAVARIA, Freni - Bioactive packaging using antioxidant extracts for the prevention of microbial food-spoilage. Food & Function. ISSN 2042-650X. Vol. 7, n.º 7 (2016), p. 3273-3282
Publisher
Royal Society of Chemistry