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| Evaluation Of Antioxidants Activity Of Some Tree Barks Grown In Libya (Al Jabal Al Akhdar) Pinus Halepensis Mill, Pistacia Lentiscus L, Juniperus Phoenicea L |
Ahmed M A Hamad - Milud A Altaiaf
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Abstract:
: The aim of the present study investigated anti-oxidant activity of various methanol-water extracts from tree barks grown in Libya (Al Jabal AL Akhdar) by four anti-oxidant assays FRAP. DPPH. H2O2 and Metal chelating activity. Additionally, these antioxidant activities were compared with BHA, BHT as reference antioxidants. Tree bark has a large, diverse class of compounds, many with antioxidant properties. This study showed FRAP inhibitory activity of the Pinus halepensis bark extracts 56.8%, while Juniperus phoeniceaL 57.6%, and Pistacia lentiscusL bark extracts was 69.2% The DPPH radical scavenging in the bark extracts exerted an inhibition of 66.8 %, 62.3% ,74.6% for Pinus halepensis, Juniperus phoenicea and Pistacia lentiscus L respectively. While H2O2 activity shows variation, ranging from 67. 8 to 81. 3%.The Metal chelating activity of the barks extract was 59% in Pinus halepensis and 57% in Juniperus phoenicea L bark extracts furthermore Pistacia lentiscus L was 67.8% in addition the Metal chelating activity of BHT and BHA 92% , 94% respectively. The high antioxidant activity of bark was founded in Pistacia lentiscus L bark extracts
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