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Junqueira Pinelli, Juliana; Sousa Guimarães, Angélica; Suela Silva, Monique; Silveira Junqueira de Moraes, Tatiana; Carlota Gonçalves, Michelle; Hilsdorf Piccoli, Roberta
Foodborne pathogens and disease 21, Številka: 5Journal Article
is a foodborne pathogen responsible for severe neuroparalytic disease associated with the ingestion of pre-formed toxin in food, with processed meats and canned foods being the most affected. Control of this pathogen in meat products is carried out using the preservative sodium nitrite (NaNO ), which in food, under certain conditions, such as thermal processing and storage, can form carcinogenic compounds. Therefore, the objective was to use nanoemulsified essential oils (EOs) as natural antimicrobial agents, with the aim of reducing the dose of NaNO applied in mortadella. The antimicrobial activity of nanoemulsions prepared with mixtures of EOs of garlic, clove, pink pepper, and black pepper was evaluated on endospores and vegetative cells of and (surrogate model) inoculated in mortadella prepared with 50 parts per million NaNO . The effects on the technological (pH, water activity, and color) and sensory characteristics of the product were also evaluated. The combinations of EOs and their nanoemulsions showed sporicidal effects on the endospores of both tested microorganisms, with no counts observed from the 10th day of analysis. Furthermore, bacteriostatic effects on the studied microorganisms were observed. Regarding the technological and sensorial characteristics of the product, the addition of the combined EOs had a negative impact on the color of the mortadella and on the flavor/aroma. Despite the strong commercial appeal of adding natural preservatives to foods, the effects on flavor and color must be considered. Given the importance of controlling in this type of product, as well as the reduction in the amount of NaNO used, this combination of EOs represents a promising antimicrobial alternative to this preservative, encouraging further research in this direction.
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