Assessment of phenolics-enriched extract and fractions of olive leaves and their antioxidant activities
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Recent studies suggest that olive leaf is a significant source of bioactive phenolic compounds comparable to olive oil and fruits. Identifying appropriate extraction methods is thus an important step to increase the yield of such bioactive components from olive leaf, which is otherwise agricultural waste. The present study evaluates phenolic contents and compositions of olive leaf extracted by several solvent methods and to further establish their antioxidant activities using various radical scavenging systems. Total flavonoid and phenolic contents were significantly higher in the 80% ethanol extract, butanol, and ethylacetate fractions than hexane, chloroform and water fractions (p<0.05). Oleuropein was identified as a major phenolic compound with considerable contents in these major three fractions and the extract that correlated with their higher antioxidant and radical scavenging. These results indicate that olive leaf contains significant amounts of oleuropein and phenolics, important factors for antioxidant capacity, which can be substantially modified by different extraction methods.
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The presence of oleuropein and other phenolic compounds (particularly containing hydroxyl groups) is an important factor for antioxidant capacity of olive leaf extracts.
“The presence of oleuropein and other phenolic compounds (particularly containing hydroxyl groups), is an important factor for antioxidant capacity of olive leaf extracts [35,36,53].”
From Comparison of Techniques and Solvents on the Antimicrobial and Antioxidant Potential of Extracts from Acacia dealbata and Olea europaea (2020) · cites this paper as [36]
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- Authors
- Lee, O.-H., Lee, B.-Y., Lee, J., Lee, H.-B., Son, J.-Y., Park, C.-S., Shetty, K., & Kim, Y.-C.
- Affiliations
- University of Massachusetts Amherst (US)
- CHA University (KR)
- Chungbuk National University (KR)
- Hankyong National University (KR)
- Kyung Hee University (KR)
- Corresponding author
- Kim, Young-Cheul
- ORCID
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2009-12
- Volume
- 100
- Issue
- 23
- Pages
- 6107-6113
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2065626182
- Cited by
- 231
- References
- 42
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 7 · 2023: 8 · 2022: 18 · 2021: 22 · 2020: 20 · 2019: 13 · 2018: 20 · 2017: 18 · 2016: 17 · 2015: 15 · 2014: 16 · 2013: 11 · 2012: 16
- FWCI
- 5.96
- Type
- journal article
- Language
- en
- Open access
- Licence
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- ScholarWorks@UMassAmherst (University of Massachusetts Amherst) (submittedVersion, cc-by-nc)
- ScholarWorks@UMassAmherst (University of Massachusetts Amherst) (submittedVersion)
- Topics
- Physical Sciences › Chemistry › Organic Chemistry › Edible Oils Quality and Analysis
- Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Date Palm Research Studies
- Keywords
- olive leaf, phenolic compounds, oleuropein, antioxidant activity, free radical scavenging, solvent extraction, ethanol extract, flavonoids, extraction optimization, agricultural waste valorization
- MeSH terms
- Agriculture, Antioxidants, Chloroform, Hexanes, Industrial Waste, Oxygen, Peroxides, Phenols, Plant Extracts, Pyrans, Water, Free Radical Scavengers, Linoleic Acid, Phenol, Olea, Iridoids, Iridoid Glucosides
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