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Full Length Research Paper
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Antioxidant and
antimicrobial activities of Solidago virgaurea
extracts
Hülya Demir1, Leyla Açık2*, E.
Burcu Bali2, L. Yasemin Koç2 and Gönül
Kaynak3
1Gazi
University, Atatürk Meslek Yüksekokulu, Department of
Chemistry, Ankara-Turkey.
2Gazi
University, Faculty of Arts and Science, Department of
Biology, Ankara-Turkey.
3Uludag
University, Faculty of Arts and Science, Department of
Biology, Bursa-Turkey.
*Corresponding author. E-mail:
leylaacik@gmail.com.
Accepted
5 December, 2008 |
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Abstract |
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Solidago
virgaurea
is an
herbaceous perennial plant of the family Asteraceae. It has
been traditionally used to terat urinary tract,
nephrolithiasis and prostate. Our objective was to determine
the antioxidant activities, reducing powers,
2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scaenging
activities and antimicrobial activities of metanol and hot
water extracts of S. virgaurea from Bursa region in
Turkey. The highest antioxidant activity was found in the
metanol extract. The reducing power of the metanol extract
was the highest, but its reducing power was markedly lower
than that of ascorbic acid. The highest DPPH
radical-scavenging activity was found in the metanol, with
50% DPPH radical scavenging at a concentration of 74.66
µgml-1 dried metanol extract, while at the same
concentration of dried water extract the value was 22.16%.
Metanol extract of S. virgaurea showed antimicrobial
activities against Staphylococcus aureus,
Enterobacter fecalis, Escherichia coli and
Bacillus cereus. The MIC valaues against bacteria 50
µgml-1. It was found that metanol and water
extracts of S. virgaurea show antioxidant activity.
It has been reported that there is an inverse relationship
between dietary intake of antioxidant-rich foods and the
incidence of a number of human diseases,
therefore these results are interesting. This plant, which
may contain both polar and apolar antioxidant compounds,
could be a potential source of natural antioxidants.
Key
words:
Solidago virgaurea,
antioxidant activity, reducing power, DPPH radical
scavenging, antimicrobial activity. |
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