Author/Authors :
Albayrak، Sevil نويسنده Department of Biology, Science Faculty, Erciyes University, 38039 Kayseri,Turkey Albayrak, Sevil , Aksoy، A نويسنده Department of Biology, Science Faculty, Erciyes University, 38039 Kayseri,Turkey Aksoy, A , Albayrak، Songul نويسنده Ulubey Vocational College, Ordu University, 52850 Ordu, Turkey Albayrak, Songul , Sagdic، O نويسنده Department of Food Engineering, Chemical and Metallurgical Engineering Faculty, Y?ld?z Teknik University, 34210 ?stanbul, Turkey Sagdic, O
Abstract :
The methanolic extracts, infusions, decoctions and hydrosols of six plants were investigated for their total
phenolic contents, antioxidant and antimicrobial activities: Mentha piperita (Peppermint), Thymus vulgaris
(thyme), Melissa officinalis (lemon balm), Ocimum basilicum (basil), Rosmarinus officinalis (rosemary) and
Salvia officinalis (sage) (Lamiaceae). Total phenolic contents were determined by Folin-Ciocalteu procedure and
ranged from 111.03 ± 0.6 (sage methanolic extract) to 19.07 ± 0.0 mg (basil methanolic extract) gallic acid
equivalent /g extract. The antioxidant activity was evaluated by two methods, DPPH and phosphomolybdenum
assays. The decoction of rosemary showed the highest DPPH radical scavenging activity (IC50 = 8.36 ?g/mL). The
methanolic extract of Peppermint showed the highest total antioxidant activity (241.85 ± 1.9 mg ascorbic acid
equivalent /g extract) measured by phosphomolybdenum assay. The antimicrobial activities of herbs were tested
against eight bacteria and two yeasts.
