Browsing by Author "Lagouri, Vasiliki"

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    In vitro antioxidant/free radical scavenging and antibacterial properties of endemic oregano and thyme extracts from Greece
    (Korean Society Food Science and Technology-Kosfost, 2011-12) Lagouri, Vasiliki; Gürbüz, Ozan; Güldaş, Metin; Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü.; Uludağ Üniversitesi/Karacabey Meslek Yüksek Okulu/Sağlık Bilimleri Fakültesi/Besin Teknolojisi Anabilim Dalı.; 0000-0002-5187-9380; 0000-0001-7871-1628; U-1332-2019; 8528582100; 35617778500
    The present investigation was to evaluate the antioxidant and antibacterial activities of hexane and methanol extracts from Origanum vulgare ssp. hirtum and Thymus vulgaris (Komotini, Greece). The methanol extracts of oregano and thyme against DPPH radical were more active than the hexane extracts (mean values 0.94 and 0.47, respectively) and oregano exhibited stronger activity than thyme (mean values 0.82 and 0.55, respectively). The results from the beta-carotene/linoleic acid assay showed that all plant extracts inhibited linoleic acid oxidation up to 70.78 +/- 1.17%. The oregano extracts exhibited the strongest inhibition against Escherichia coli, Listeria monocytogenes, and Staphylococcus aureus using the disc diffusion assay. The chemical composition of the hexane and methanol extracts, by using GC-MS, showed that carvacrol, thymol, and p-cymene were the most prominent compounds. The methanol extract of oregano was found the most potent antioxidant with the highest content of total phenolics (138.92 mg GA/g extract) and carvacrol (76.7%).