Abstract
The in vitro antioxidant properties of methanol and aqueous extracts of stem bark from Pittosporum dasycaulon Miq. were investigated. Fractions were screened for total antioxidant capacity, ferric reducing power, and radical scavenging activities. The total phenolic, flavonoid, and tannin contents of the methanol and aqueous extracts were also determined. The aqueous extract exhibited a stronger scavenging effect than the methanol extract against the DPPH free radical, the nitric oxide radical, and the superoxide radical. The methanol extract exhibited a stronger total antioxidant activity and reducing power than the aqueous extract. The free radical scavenging effect of P. dasycaulon stem bark extracts was comparable to an ascorbic acid reference antioxidant while the reducing power of the methanol extract was greater than ascorbic acid. P. dasycaulon stem bark is a potential source of natural antioxidant compounds.
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Mani, B., Dennis, T. Evaluation of the antioxidant potential of Pittosporum dasycaulon Miq. stem bark. Food Sci Biotechnol 23, 539–545 (2014). https://doi.org/10.1007/s10068-014-0074-8
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DOI: https://doi.org/10.1007/s10068-014-0074-8