Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/1855
Título: Antioxidant and free radical scavenging activities of different plant parts from two Erica species
Autor: Nunes, Ricardo
Anastácio, Ana
Carvalho, Isabel Saraiva de
Data: Set-2012
Editora: Willey Online Library
Resumo: Aqueous extractions from two species of Erica consumed as infusions in several countries to heal ailments were investigated for their phenolic and flavonoid contents, along with antioxidant capacity and radical scavenging capacity using total antioxidant activity, ferric-reducing antioxidant power, reducing power, 1,1-diphenyl-2-picrylhydrazyl and 2-2'-azino-bis(3 ethylbenzothiazoline-6-sulfonic acid) radicals, respectively. Antioxidant properties and total phenolic content differed significantly among these plants. Aqueous extracts of leaves possessed, on average, the highest antioxidant capacity and phenolic content (34.09 ± 10.81 mg ascorbic acid equivalent/g dry weight and 30.59 ± 10.19 mg gallic acid equivalent/g dry weight, respectively) of all three plant parts. A significant correlation (r2 = 0.952) between antioxidant capacity and total phenolic content was found, indicating that phenolic compounds are the major contributors to the antioxidant properties of these plants. Upon application of hierarchical cluster analysis to the results obtained, leaves with flowers were grouped in one cluster, whereas branches remained in another cluster, showing little interference from the collection site or species factors.
Peer review: yes
URI: http://hdl.handle.net/10400.1/1855
ISSN: 1745-4557
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)

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