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Molecules 2009, 14(3), 970-978; doi:10.3390/molecules14030970
Article

Antioxidant Activity and Phenolic Content of Paederia foetida and Syzygium aqueum

* , ,  and
Universiti Sains Malaysia, 11800 Gelugor, Pulau Pinang, Malaysia
* Author to whom correspondence should be addressed.
Received: 8 December 2008 / Revised: 13 January 2009 / Accepted: 15 January 2009 / Published: 3 March 2009
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Abstract

The antioxidant activity of fresh and dried plant extracts of Paederia foetida and Syzygium aqueum were studied using β-carotene bleaching and the 2,2’-azinobis(3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS) radical cation assay. The percentage of antioxidant activity for all extract samples using both assays was between 58 and 80%. The fresh samples of both plants had higher antioxidant activity than the dried samples. The results of the β-carotene bleaching assay were correlated (R2 = 0.9849) with those of the ABTS assay.
Keywords: Paederia foetida; Syzygium aqueum; Antioxidant activity; Phenolic content Paederia foetida; Syzygium aqueum; Antioxidant activity; Phenolic content
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Osman, H.; Rahim, A.A.; Isa, N.M.; Bakhir, N.M. Antioxidant Activity and Phenolic Content of Paederia foetida and Syzygium aqueum. Molecules 2009, 14, 970-978.

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