Abstract
The chemical composition, antimicrobial and antioxidant activity of Thymus praecox extracts obtained by fractional supercritical fluid extraction (SFE) with carbon dioxide were investigated. Properties of supercritical extracts and extracts obtained by Soxhlet extraction were compared. The chemical composition of extracts was determined using GC–FID and GC–MS analytical methods. The antimicrobial activity of extracts was evaluated against 16 pathogenic microorganisms using microdilution method. Antioxidant potential of extracts to neutralize DPPH radicals was also investigated. Investigated supercritical extracts showed better antimicrobial activity than commercial antibiotics (streptomycin and ampicillin) and commercial fungicides (bifonazol and ketoconazole) against all tested strains. For bacteria MIC and MBC were 38–200μg/ml and 75–300μg/ml, respectively, while for fungi MIC and MFC were 17–150μg/ml and 35–300μg/ml, respectively.
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