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Evaluation of combinations of essential oils and essential oils with hydrosols on antimicrobial and antioxidant activities

Hay, Yann-Olivier Marie and Abril-Sierra, Miguel A. and Sequeda-Castañeda, Luis G. and Bonnafous, Catherine and Raynaud, Christine Evaluation of combinations of essential oils and essential oils with hydrosols on antimicrobial and antioxidant activities. (2018) Journal of Pharmacy & Pharmacognosy Research, 6 (3). 216-230. ISSN 0719-4250

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Context: Essential oils (EO) are commonly extracted from plants by steam distillation in which an aqueous phase called hydrosol (HD) is obtained. Unlike EO, hydrosol studies have been limited despite the interest of the food, cosmetic and phytotherapeutic industries to find natural preservative alternatives to synthetic ones. Aims: To evaluate the in vitro antimicrobial and antioxidant efficacies of combinations of essential oils (EOs) and essential oils and hydrosols (HDs) of Lippia alba, Rosmarinus officinalis, and Thymus vulgaris. Methods: The EOs and HDs were characterized by gas chromatography with flame ionization detector and gas chromatography coupled with mass spectrometry. Then, they were screened against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Candida albicans and Aspergillus niger using the microdilution method for the four first strains and the agar diffusion method for Aspergillus niger. Antioxidant capacity was evaluated using ABTS method. Results: Interactions between essential oils, and essential oils and hydrosols were found to be as microbicide, and for the first time, antioxidant using the fractional inhibitory concentration. When compared with individual EOs, EO-EO combinations diminished the microbicide minimum concentration. Conclusions: The Thymus vulgaris EO-HD combination, in comparison with individual extracts, diminishes by four times the MBC against Escherichia coli and decrease by half their antioxidant capacity.

Item Type:Article
HAL Id:hal-02373451
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Farmaverde - CTA (COLOMBIA)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Pontificia Universidad Javeriana (COLOMBIA)
Laboratory name:
Deposited On:21 Nov 2019 07:36

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