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    Antimicrobial activity of resins obtained from the roots and stems of Cedrus libani and Abies cilicia
    (Maik Nauka/Interperiodica, 2002) Kizil, M; Kizil, G; Yavuz, M; Aytekin, C
    The antimicrobial activity of the ethanol extract of resins obtained from the roots and stems of Cedrus libani and Abies cilicia has been studied, using the disc diffusion method. The results obtained indicate that crude extracts of the resins of both plants are highly efficient in preventing the growth of microorganisms.
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    Öğe
    Antimicrobial activity of the tar obtained from the roots and stems of Pinus brutia
    (Taylor & Francis Ltd, 2002) Kizil, M; Kizil, G; Yavuz, M; Aytekin, Ç
    The antimicrobial activity of the crude and methanol, hexane, chloroform. petroleum ether, ethyl acetate and n-butanol extracts of tar obtained from the roots and stems of Pinus brutia Ten., used in the folk medicine of Turkey, were screened in vitro for antimicrobial activity against clinically isolated bacterial strains: Staphylococcus aureus ( 15 isolates), Streptococcus pyogenes ( 12 isolates), Escherichia coli (17 isolates) and the yeast fungus Candida albicans (3 isolates) by the paper disc diffusion method. Results revealed that a crude extract of the tar is highly effective against all tested microorganisms by preventing their growth to a significant extent. All the organic extracts showed similar moderate antimicrobial activity against tested microorganisms at a concentration of 80 mug/mL. The results demonstrate that the crude tar extract has a very broad spectrum of activity, and suggests that it may be useful in the treatment of various microbial infections, The results suggest that traditional folk medicine could be used a guide in our continuing search for new natural products with potential medicinal properties.
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    Öğe
    Compositions and antimicrobial activities of the essential oils of two Hypericum species from Turkey
    (Elsevier Science Bv, 2006) Toker, Z; Kizil, G; Özen, HÇ; Kizil, M; Ertekin, S
    The chemical compositions of essential oils obtained from Hypericum hyssopifolium var. microcalycinum and Hypericum lysimachioides var. lysimachioides were analysed by using GC and GC-MS. Caryophyllene oxide was found to be the major component. The essential oils of both Hypericum species showed antimicrobial activity against nine microorganism at a concentration of 60 to 80 mu g/ml. (c) 2005 Elsevier B.V. All rights reserved.