期刊
MOLECULES
卷 27, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/molecules27217330
关键词
essential oil; nanoemulsion; RSM experimental design; physical characterisation; biological activities; sensory analysis
资金
- Tunisian Ministry of Higher Education, Scientific Research, Information, and Communication Technologies [MILKQUA-H2020-PRIMA 2018-Section 2]
This study aimed to optimize the encapsulation of Thymus capitatus essential oil into nanoemulsion. The results showed that the encapsulated nanoemulsion exhibited improved stability, antimicrobial efficacy, and sensory appreciation in enriched milk.
This manuscript aimed to optimise the encapsulation of Thymus capitatus essential oil into nanoemulsion. Response Surface Methodology results were best fitted into polynomial models with regression coefficient values of more than 0.95. The optimal nanoemulsion showed nanometer-sized droplets (380 nm), a polydispersity index less than 0.5, and a suitable Zeta potential (-10.3 mV). Stability results showed that nanoemulsions stored at 4 degrees C were stable with the lowest d(3,2), PolyDispersity Index (PDI), and pH (day 11). Significant ameliorations in the capacity to neutralise DPPH radical after the encapsulation of the antimicrobial efficacy of thyme essential oil were recorded. S. typhimurium growth inhibition generated by nanoencapsulated thyme essential oil was 17 times higher than by bulk essential oil. The sensory analysis highlighted that the encapsulation of thyme essential oil improved enriched milk's sensory appreciation. Indeed, 20% of the total population attributed a score of 4 and 5 on the scale used for milk enriched with nanoemulsion. In comparison, only 11% attributed the same score to milk enriched with bulk essential oil. The novel nanometric delivery system presents significant interest for agroalimentary industries.
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