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Abstract Title:

Phenolic compounds and antioxidant activity of olive leaf extracts.

Abstract Source:

Nat Prod Res. 2012 ;26(2):186-9. Epub 2011 Nov 7. PMID: 22060136

Abstract Author(s):

Vassiliki G Kontogianni, Ioannis P Gerothanassis

Article Affiliation:

Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina GR-45110, Greece. me01375@cc.uoi.gr

Abstract:

The total phenolic content and antioxidant activities of olive leaf extracts were determined. Plant material was extracted with methanol and fractionated with solvents of increasing polarity, giving certain extracts. The qualitative changes in the composition of the extracts were determined after the storage of leaves for 22 h at 37°C, before the extraction. Total polyphenol contents in extracts were determined by the Folin-Ciocalteu procedure. They were also analysed by liquid chromatography-mass spectrometry. Their antioxidant activities were evaluated using the diphenyl picrylhydrazyl method and the β-carotene linoleate model assay. Moreover, the effects of different crude olive leaf extracts on the oxidative stability of sunflower oil at 40°C and sunflower oil-in-water emulsions (10% o/w) at 37°C, at a final concentration of crude extract 200 mg kg(-1) oil, were tested and compared with butylated hydroxyl toluene.

Study Type : Plant Study
Additional Links
Pharmacological Actions : Antioxidants : CK(8430) : AC(3132)

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Sayer Ji
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Depression: 21st Century Solutions + The Dark Side of Wheat

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