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Browsing by Author "Sedaki, Asma"

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  • Antimicrobial and bioactive property monitorization of a polymer-based food contact material
    Publication . Sedaki, Asma; Melgar Castañeda, Bruno; Carocho, Márcio
    Plastic has become one of the key environmental issues of our time, over 8 million tons of plastic is cast into the ocean every year (UN Environment report ,2018). Majority of it being plastic packaging, from food packaging. Plastic waste is considered a global problem; therefore, solutions are in need to reduce the pollution resulting from the overuse of this material (Jung H., 2014). In this context, this work explores the possibility of manufacturing a solution from a natural biopolymer to use as a spray to coat and protect food as an alternative barrier. The contact between the spray and food is harmless for human health. The Spray solution is composed of a primary solution of a natural biopolymer iota-carrageenan and a mixture of different natural antioxidants and extract from the plant of Rosmarinus officinalis. L, the extraction was made using two techniques, one with infusion extraction and the second is Ultrasound-Assisted Extraction and then mixed on an aseptic environment. The current work focuses on monitoring antioxidant activity using two methods (the DPPH and TBARS) and antimicrobial activity using a shelf-life span of 6 months, divided in 7 different times (0, 7, 15 days and 1, 2, 4, 6 month), in 4 different conditions 2 in refrigeration (± 3°C) and 2 at room temperature, each temperature with a pool of light protected and another one without light protection. And the study of Physico-chemical properties of the first formulation of Spray Safe food Solution and after the reformulation with the K-carraeenan polymer. According to the obtained results, both extraction technique is excellent with advancing the infusion extraction because of the low coast. Also, the results showed that the spray safe solution have a good antioxidant and antimicrobial activity with some microorganisms. In this study, reports within our research group have indicated that the solution could help protecting certain type of foods. And indicates that natural polymers combined with natural antimicrobials and antioxidants can be employed to reduce the dependence on synthetic polymers and offer feasible solutions to be applied at an industrial level.
    2022Master thesis Open access Show more