Antioxidant activity of solvent extracts from Vietnamese medicinal plants
Nguyễn Quang Vịnh, Jong‐Bang Eun
Journal of Medicinal Plants Research
Abstract
The methanol, ethanol, acetone, and water extracts of six Vietnamese medicinal plants,Premna integrifolia, Terminalia nigrovenulosa, Pseuderanthemum palatiferum,Streptocaulon juventas, Eclipta alba (L), and Solanum hainanense were investigated for their antioxidant and radical scavenging activities using reducing power, metal chelating activity, and 2,2-diphenyl-2-picrylhydrazyl hydrate (DPPH) assays. Extraction yields, total phenolic and flavonoid contents of methanol extracts were higher than those of other solvent extracts. These results were also similar to reducing power and radical scavenging activities of extracts of T. nigrovenulosa and P. integrifolia. However, the highest metal chelating activity was found in methanol and water extracts of S. juventas, and methanol extract of E. alba. The methanol extracts of T. nigrovenulosa (bark and leaves) and P. integrifolia leaves, which were found to have high anti-radical capacities and reducing power, and those of S. juventas and E. alba, with their high metal chelating activity, have significant potential for use as natural antioxidants. Key words: Medicinal plants, polyphenol, antioxidant activity, radical scavenging.
Extracted Claims
3 claims extracted from this paper into the knowledge graph
Methanol and water extracts of S. juventas and E. alba had high metal chelating activity
“the highest metal chelating activity was found in methanol and water extracts of S. juventas, and methanol extract of E. alba.”
Methanol extracts of T. nigrovenulosa and P. integrifolia had high anti-radical capacities and reducing power
“The methanol extracts of T. nigrovenulosa (bark and leaves) and P. integrifolia leaves, which were found to have high anti-radical capacities and reducing power,”
Methanol extracts had higher extraction yields, total phenolic and flavonoid contents compared to other solvent extracts
“Extraction yields, total phenolic and flavonoid contents of methanol extracts were higher than those of other solvent extracts.”