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    In Vitro Antimicrobial and Antioxidant Activity of Ethanol Extract of Three Hypericum and Three Achillea Species From Turkey
    (Taylor & Francis Inc, 2011) Baris, Deniz; Kizil, Murat; Aytekin, Cetin; Kizil, Goksel; Yavuz, Murat; Ceken, Bircan; Ertekin, A. Selcuk
    The present study was conducted to determine the antimicrobial, antifungal and antioxidant activity of the ethanol extract of Hypericum scabrum L (HSm), Hypericum lysimachioides var. lysimachioides (HL), and Hypericum retusum Aucher (HR) and ethanol extracts of Achillea aleppica D.C. subsp. aleppica (AA), Achillea aleppica D.C. subsp. zederbaueri (Hayek) Hub.-Mor (AZ), and Achillea biebersteinii Afan. (AB). The antioxidant properties of extracts were evaluated using different antioxidants tests, including reducing power, free radical scavenging, deoxyribose assay, metal chelating activities and determination of total phenolic compounds. The extracts obtained from Hypericum and Achillea species showed high antioxidant properties. The protective effects of plant extracts were compared with a well known antioxidant, Butilated Hydroxytoluen (BHT) and -tocopherol. Total antioxidant activity of ethanol extracts of plants were also tested by using ferric thiocyanate (FTC) and thiobarbituric acid (TBA) methods. Antioxidative activities of plant extracts were found to be comparable with Vitamin E. The results showed that the ethanol extracts of all tested plant exhibited different activity against tested microorganisms. Since most of the studied extracts have good antimicrobial and antioxidant activity, it might be possible to use them as natural food additives that act both as antioxidants and as spices.
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    Öğe
    A phytosociological study on Karaomer Mountain of North Anatolia (Amasya, Turkey)
    (Soc Botanique France, 2010) Cansaran, Arzu; Kaya, Omer Faruk; Ertekin, A. Selcuk; Ketenoglu, Osman
    The vegetation of Karaomer Mountain (Amasya, Turkey) was examined synecologically and syntaxinomically. The study area is a transitional zone between the boundaries of Central Anatolia and Middle Black Sea region. From the phytogeographical point of view, it is situated between the Euro-Siberian and Irano-Turanian floristic regions. The vegetation of the study area was analyzed according to the Braun-Blanquet method and the plant associations are classified by considering the characteristic species. Seven new plant associations belonging to three different vegetation types are described in the study area.