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Biology

TÜBİTAK

2006

Antioxidant activity

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Biological Activities Of The Essential Oil And Methanol Extract Of Achillea Biebersteinii Afan. (Asteraceae), Özlem Bariş, Medi̇ne Güllüce, Fi̇kretti̇n Şahi̇n, Hakan Özer, Hamdullah Kiliç, Hakan Özkan, Münevver Sökmen, Tüli̇n Özbek Jan 2006

Biological Activities Of The Essential Oil And Methanol Extract Of Achillea Biebersteinii Afan. (Asteraceae), Özlem Bariş, Medi̇ne Güllüce, Fi̇kretti̇n Şahi̇n, Hakan Özer, Hamdullah Kiliç, Hakan Özkan, Münevver Sökmen, Tüli̇n Özbek

Turkish Journal of Biology

The present work examined the in vitro antimicrobial and antioxidant activities of the essential oil and methanol extract from Achillea biebersteinii Afan. (Asteraceae). The essential oil exhibited antimicrobial activity against 8 bacteria, 14 fungi and the yeast C. albicans, whereas methanolic extract remained inactive. The antioxidative capacity of the samples was evaluated by using DPPH (2,2-diphenyl-1-picrylhydrazyl) and b-carotene/linoleic acid assays. In both assays, the extract showed better antioxidative capacity than the oil. The extract reduced the stable free radical DPPH with lower IC50 value (89.90 µg/ml) than the oil (8900 µg/ml). In the b-carotene/linoleic acid assay, the samples were not …


Antioxidant And Free Radical Scavenging Properties Of Twelve Traditionally Used Indian Medicinal Plants, Farrukh Aqil, Iqbal Ahmad, Zafar Mehmood Jan 2006

Antioxidant And Free Radical Scavenging Properties Of Twelve Traditionally Used Indian Medicinal Plants, Farrukh Aqil, Iqbal Ahmad, Zafar Mehmood

Turkish Journal of Biology

The methanolic crude extracts of 12 traditionally used Indian medicinal plants were screened for their antioxidant and free radical scavenging properties using a-tocopherol and butylated hydroxy toluene (BHT) as standard antioxidants. Antioxidant activity was measured by ferric thiocyanate (FTC) assay and compared with the thiobarbituric acid (TBA) method. Free radical scavenging activity was evaluated using diphenyl picryl hydrazyl (DPPH) radicals. The overall antioxidant activity of Lawsonia inermis was the strongest, followed in descending order by Ocimum sanctum, Cichorium intybus, Piper cubeba, Punica granatum, Allium sativum, Delonix regia, Terminalia chebula, Terminalia bellerica, Mangifera indica, Camellia sinensis, and Trigonella foenum-graecum. Seven plants, …