AI Article Synopsis
- The study evaluated how different drying temperatures (40, 50, and 60 °C) affect the drying kinetics, chemical composition, yield, and antioxidant activity of essential oils from Verbenaceae leaves.
- Gas chromatography techniques were used to analyze the essential oil compositions, showing that thymol was the major compound, with fresh leaves yielding the highest content (62.78%).
- The essential oils demonstrated significant DPPH radical scavenging activity, averaging 73.10%, with fresh leaves exhibiting the strongest inhibition at 89.97%, making this the first study on how drying impacts these properties in thymol-rich essential oils.
Article Abstract
Leaves of (Verbenaceae) were dried in an oven at 40, 50 and 60 °C and the kinetic of drying and the influence of the drying process on the chemical composition, yield, and DPPH radical scavenging activity of the obtained essential oils were evaluated. The composition of the essential oils was determined with gas chromatography-mass spectrometry and gas chromatography-flame ionization detection analyses. The influence of drying on the chemical composition of the essential oils of was evaluated by multivariate analysis, and their antioxidant activity was investigated via the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The Midilli model was the most appropriate to describe the behavior of drying kinetic data of leaves. Thymol was the major compound for all analyzed conditions; the maximum content was obtained from fresh leaves (62.78 ± 0.63%). The essential oils showed DPPH radical scavenging activity with an average of 73.10 ± 12.08%, and the fresh leaves showed higher inhibition (89.97 ± 0.31%). This is the first study to evaluate the influence of drying on the chemical composition and antioxidant activity of essential oils rich in thymol.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124978 | PMC |
| http://dx.doi.org/10.3390/molecules26092621 | DOI Listing |
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