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Phenolic compounds and antioxidant activity of olive leaf extracts.
Nat Prod Res. 2012; 26(2):186-9.NP

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.

Authors+Show Affiliations

Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina GR-45110, Greece. me01375@cc.uoi.grNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22060136

Citation

Kontogianni, Vassiliki G., and Ioannis P. Gerothanassis. "Phenolic Compounds and Antioxidant Activity of Olive Leaf Extracts." Natural Product Research, vol. 26, no. 2, 2012, pp. 186-9.
Kontogianni VG, Gerothanassis IP. Phenolic compounds and antioxidant activity of olive leaf extracts. Nat Prod Res. 2012;26(2):186-9.
Kontogianni, V. G., & Gerothanassis, I. P. (2012). Phenolic compounds and antioxidant activity of olive leaf extracts. Natural Product Research, 26(2), 186-9. https://doi.org/10.1080/14786419.2011.582842
Kontogianni VG, Gerothanassis IP. Phenolic Compounds and Antioxidant Activity of Olive Leaf Extracts. Nat Prod Res. 2012;26(2):186-9. PubMed PMID: 22060136.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phenolic compounds and antioxidant activity of olive leaf extracts. AU - Kontogianni,Vassiliki G, AU - Gerothanassis,Ioannis P, Y1 - 2011/11/07/ PY - 2011/11/9/entrez PY - 2011/11/9/pubmed PY - 2012/4/10/medline SP - 186 EP - 9 JF - Natural product research JO - Nat Prod Res VL - 26 IS - 2 N2 - 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. SN - 1478-6427 UR - https://www.unboundmedicine.com/medline/citation/22060136/Phenolic_compounds_and_antioxidant_activity_of_olive_leaf_extracts_ L2 - https://www.tandfonline.com/doi/full/10.1080/14786419.2011.582842 DB - PRIME DP - Unbound Medicine ER -