Effects of essential oil and its nanoemulsion on oxidative stability and microbial growth in mayonnaise during storage.

The present study aimed to investigate the effects of essential oil (CEO) and its nanoemulsion (CEON) on oxidative stability and microbial growth of mayonnaise during storage. The GC analysis indicated that Cuminaldehyde (27.99%), o-Cymene (17.31%), γ-Terpinen (16.67%), and β-Pinene (9.35%) were the major components of CEO, respectively. The assessments of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) showed that ATCC 25922 (MBC = 12 and MBC = 6 mg/mL) was the most resistant bacteria, and in contrast, ATCC 29213 (MBC = 6 and MBC = 3 mg/mL) was the most sensitive bacteria. In the radical-scavenging assay, CEON (IC = 5 ± 0.07 μg/mL) exhibited a higher antioxidant activity than CEO (IC = 10 ± 0.13 μg/mL). The results showed that applying the MBC of CEO and CEON in mayonnaise led to a significant decrease ( < .05) in acidity, peroxide value, number of acid-resistant bacteria and fungi, and total microbial count compared with the control sample. In conclusion, this study demonstrated that using CEON resulted in oxidative stability, microbial growth control, and desirable sensorial attributes in mayonnaise compared with CEO and control samples.