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1- Food, Drug and Natural Products Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran
2- Food, Drug and Natural Products Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
3- Food, Drug and Natural Products Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran ,maryamebrahimi.gau@gmail.com
4- Faculty of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran, Iran
2- Food, Drug and Natural Products Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
3- Food, Drug and Natural Products Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran ,
4- Faculty of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran, Iran
Abstract: (116 Views)
Due to their antimicrobial and antioxidant properties, essential oils are used as natural preservatives. The purpose of this study was to investigate the chemical composition, antioxidant properties, and antimicrobial activity of emulsion and nanoemulsion forms of Salvia officinalis, Pimpinella anisum, Dracocephalum moldavica, and Syzygium aromaticum essential oils. The Agar well-diffusion assay results obtained from the experiment suggested that nanoemulsion of Dracocephalum moldavica essential oil had the maximum antimicrobial activity against the pathogenic microorganisms drawn in the experiment. The inhibition zone diameters of the nanoemulsion of this essential oil against Shigella dysenteriae, Salmonella Typhimurium, Pseudomonas aeruginosa, Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Bacillus cereus were 11.03, 11.82, 13.02, 13.13, 13.13, 13.62, and 14.10 mm, respectively. In contrast, the inhibition zone diameters of the emulsion form of this essential oil against S. dysenteriae, S. Typhimurium, P. aeruginosa, S. aureus, L. monocytogenes, E. coli, and B. cereus were 9.66, 10.34, 10.84, 11.84, 11.34, 11.17, and 11.24 mm, respectively. The major components of Dracocephalum moldavica essential oil included geraniol (27.24%), geranial (10.75%), alpha-copaene (8.16%), alpha-pinene (7.37%), carvacrol (7.41%), limonene (6.86%), and nerol (6.45%). The nanoemulsion form of the essential oils investigated thus possessed a significantly greater antioxidant potential compared to their emulsion form. This study also demonstrated that the nanoemulsions exhibited significantly lower IC50 values compared to the emulsions. From the results, it was seen that the nanoemulsion form of Dracocephalum moldavica essential oil had the lowest IC50 and EC50 values of 22.17 µg/ml and 4.51 µg/ml, respectively.
Article Type: Original Research |
Subject:
Food Microbiology
Received: 2024/11/29 | Accepted: 2024/01/11
Received: 2024/11/29 | Accepted: 2024/01/11
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