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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Hulya Demir
Full-Text PDF XML 538 Views
DOI:10.17265/2159-5828/2018.06.006
Affiliation(s)
Faculty of Health Science of Nutrition and Dietetic, Yeditepe University, Istanbul 34755, Turkey
ABSTRACT
The purpose of this study was to determine the chemical composition,
total phenolic composition, the antioxidant and antimicrobial properties of the
essential oils (EOs) of Mentha piperita L., Salvia officinalis L., and Thymus vulgaris L. The essential oils of M. piperita L., S. officinalis L., and T. vulgaris L. were analyzed by means of gas chromatography-mass spectrometry
(GC-MS) to demonstrate their chemical composition. The antioxidant properties
of the EOs were evaluated with the 2,2-diphenyl-picrylhydrazyl (DDPH) free
radical scavenging assay, their total phenolic compound contents were determined
by the Folin Ciocalteau method, and their antimicrobial activities were
evaluated by the disc diffusion assay. The major compounds in the contents of
the essential oils of M. piperita L., S. officinalis L., and T. vulgaris L. were found to be eucalyptol,
1R-α-pinene, and o-cymene, respectively. In the 2,2-diphenyl-picrylhydrazyl
(DDPH) assay, the EO of M. piperita L.
(8,930.01 µMTE/g)
demonstrated the highest antioxidant activity, followed by the activities of
the EOs of T. vulgaris L. (157.76 µMTE/g) and S. officinalis L. (115.54 µMTE/g). The
total phenolic compound contents of M.
piperita L., T. vulgaris L., and S. officinalis L. were measured as 135.074, 0.242, and 0.221 mMGAE/g. All essential
oils showed antioxidant activities and antimicrobial activities. The highest
antimicrobial activity against S. aureus, A. nigeris, and C. albicans was determined in the EO of M. piperita L. within diameters of 42, 32, and 28 mm, respectively. These
properties of essential oils are used in the pharmaceutical and food
industries. The essential oils are approved as official medications in many
countries and take place in their pharmacopoeias.
KEYWORDS
Essential oils, chemical composition, total phenolic composition, antioxidant capacity, antimicrobial activity.
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