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Assessment of the antioxidant, antimicrobial and antibiofilm activities of essential oils for potential application of active chitosan films in food preservation

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Abstract

In the food industry, the development of microbial biofilms is a serious problem that leads to the contamination and deterioration of food products. To overcome that, our aim consists of searching for natural antimicrobial and non-toxic compounds (essential oils EOs), which might be used alone or adsorbed on natural biopolymer films (chitosan). In this work, the antioxidant activity of eight EOs was evaluated by DPPH radical-scavenging method while their antibacterial activity was determined by diffusion on agar and microdilution methods. Among all tested EOs, Eugenia caryophyllus, Cinnamomum zeylanicum Blume and Thymus satureioides Cosson showed high antioxidant activities at the concentration of 25.6 mg/mL, with respective values of (86.26%, 81.75%, and 76%), and strong antibacterial activity against Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, and Enterococcus hirae, with (MIC) values ≤ 4 µL/mL. At the concentration of 1 µL/mL, these EOs tested alone, showed values of antibiofilm-forming activity ranging from 79.43 to 99.33% and from 44.18 to 94.17%, when they are adsorbed onto chitosan film. These promising results confirm that these three EOs have a good potential for an eventual application in the food industry, as antimicrobial and antioxidant agents, or as active biodegradable food packaging, if combined with chitosan.

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Acknowledgements

We thank Nectarome society (Marrakech, Morocco) for providing the EOs used in this investigation.

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The authors state that they did not receive any funding, grants, or other forms of support in the development of this manuscript.

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AM, AG, CD, SIK, ZET and CEM: Design and conceptualization. AM, AG, CD and CEM: methodology. AM: software. AM, AG, CD, ZET and CEM: validation. formal analysis: AM, AG, CD, ZET and CEM. AB and CD: resources. AM and AG: data curation. AM: writing. AM, AG, ZET and CEM: writing-review. AG, CD, SIK and CEM: supervision. The published version of the manuscript has been read and approved by all authors.

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Correspondence to Amine Guendouz or Cédric Delattre.

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Mouhoub, A., Guendouz, A., Belkamel, A. et al. Assessment of the antioxidant, antimicrobial and antibiofilm activities of essential oils for potential application of active chitosan films in food preservation. World J Microbiol Biotechnol 38, 179 (2022). https://doi.org/10.1007/s11274-022-03363-9

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  • DOI: https://doi.org/10.1007/s11274-022-03363-9

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