Comparative Study of Essential Oils Extracted from Egyptian Basil Leaves (Ocimum basilicum L.) Using Hydro-Distillation and Solvent-Free Microwave Extraction

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Mohammed ChenniFarid Chemat

Abstract

Solvent-free microwave extraction (SFME) and conventional hydro-distillation (HD) were used for the extraction of essential oils (EOs) from Egyptian sweet basil (Ocimum basilicum L.) leaves. The two resulting EOs were compared with regards to their chemical composition, antioxidant, and antimicrobial activities. The EO analyzed by GC and GC-MS, presented 65 compounds constituting 99.3% and 99.0% of the total oils obtained by SFME and HD, respectively. The main components of both oils were linalool (43.5% SFME; 48.4% HD), followed by methyl chavicol (13.3% SFME; 14.3% HD) and 1,8-cineole (6.8% SFME; 7.3% HD). Their antioxidant activity were studied with the 2,2-diphenyl-1-picrylhydrazyl (DPPH(•)) radical scavenging method. The heating conditions effect was evaluated by the determination of the Total Polar Materials (TPM) content. The antimicrobial activity was investigated against five microorganisms: two Gram-positive bacteria, Staphylococcus aureus and Bacillus subtilis, two Gram-negative bacteria, Escherichia coli and Pseudomonas aeruginosa, and one yeast, Candida albicans. Both EOs showed high antimicrobial, but weak antioxidant, activities. The results indicated that the SFME method may be a better alternative for the extra...Continue Reading

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Citations

Jul 16, 2019·Genome Biology and Evolution·Shu-Ye JiangSrinivasan Ramachandran
Sep 11, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yasir ArafatLaxmikant Shivnath Badwaik
Oct 11, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Fanica BalanescuRodica Mihaela Dinica
Oct 23, 2020·International Journal of Environmental Research and Public Health·Ovidiu TițaCecilia Georgescu
Apr 20, 2021·SAR and QSAR in Environmental Research·P R DuchowiczN C Comelli

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