ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES

The present study was conducted to assess the antioxidant activity of Hypericum species endemic to South Brazil, H. caprifoliatum, H. carinatum, H. myrianthum and H. polyanthemum. The free radical scavenging properties of plant extracts were evaluated employing different methodologies, including the...

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Autores principales:	BERNARDI,A.P.M, LÓPEZ-ALARCÓN,C., ASPÉE,A, RECH,S.B, VON POSER,G.L, BRIDI,R, DUTRAFILHO,C. S, LISSI,E
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	polyphenols antioxidant activity DPPH TRAP ORAC
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400004
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spelling	oai:scielo:S0717-970720080004000042009-05-22ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIESBERNARDI,A.P.MLÓPEZ-ALARCÓN,C.ASPÉE,ARECH,S.BVON POSER,G.LBRIDI,RDUTRAFILHO,C. SLISSI,E polyphenols antioxidant activity DPPH TRAP ORAC The present study was conducted to assess the antioxidant activity of Hypericum species endemic to South Brazil, H. caprifoliatum, H. carinatum, H. myrianthum and H. polyanthemum. The free radical scavenging properties of plant extracts were evaluated employing different methodologies, including the bleaching of a stable free radical (2,2-diphenyl-l-picrylhydrazyl, DPPH) and the peroxyl reactivity indexes TRAP (Total Reactive Antioxidant Potential) and ORAC-pyrogallol red (Oxygen Radicáis Absorbance Capacity). A fair correlation was found between total phenol content determined by Folin-Ciocalteau and DPPH consumption, both in crude methanol and n-hexane extracts. In particular, H. myrianthum and H. caprifoliatum showed the highest TRAP and ORAC-pyrogallol red values, respectively. This would imply that H. myrianthum contains a larger amount of antioxidants of lower reactivity.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.4 20082008-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400004en10.4067/S0717-97072008000400004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	polyphenols antioxidant activity DPPH TRAP ORAC
spellingShingle	polyphenols antioxidant activity DPPH TRAP ORAC BERNARDI,A.P.M LÓPEZ-ALARCÓN,C. ASPÉE,A RECH,S.B VON POSER,G.L BRIDI,R DUTRAFILHO,C. S LISSI,E ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES
description	The present study was conducted to assess the antioxidant activity of Hypericum species endemic to South Brazil, H. caprifoliatum, H. carinatum, H. myrianthum and H. polyanthemum. The free radical scavenging properties of plant extracts were evaluated employing different methodologies, including the bleaching of a stable free radical (2,2-diphenyl-l-picrylhydrazyl, DPPH) and the peroxyl reactivity indexes TRAP (Total Reactive Antioxidant Potential) and ORAC-pyrogallol red (Oxygen Radicáis Absorbance Capacity). A fair correlation was found between total phenol content determined by Folin-Ciocalteau and DPPH consumption, both in crude methanol and n-hexane extracts. In particular, H. myrianthum and H. caprifoliatum showed the highest TRAP and ORAC-pyrogallol red values, respectively. This would imply that H. myrianthum contains a larger amount of antioxidants of lower reactivity.
author	BERNARDI,A.P.M LÓPEZ-ALARCÓN,C. ASPÉE,A RECH,S.B VON POSER,G.L BRIDI,R DUTRAFILHO,C. S LISSI,E
author_facet	BERNARDI,A.P.M LÓPEZ-ALARCÓN,C. ASPÉE,A RECH,S.B VON POSER,G.L BRIDI,R DUTRAFILHO,C. S LISSI,E
author_sort	BERNARDI,A.P.M
title	ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES
title_short	ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES
title_full	ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES
title_fullStr	ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES
title_full_unstemmed	ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES
title_sort	antioxidant activityin southern brazil hypericum species
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400004
work_keys_str_mv	AT bernardiapm antioxidantactivityinsouthernbrazilhypericumspecies AT lopezalarconc antioxidantactivityinsouthernbrazilhypericumspecies AT aspeea antioxidantactivityinsouthernbrazilhypericumspecies AT rechsb antioxidantactivityinsouthernbrazilhypericumspecies AT vonposergl antioxidantactivityinsouthernbrazilhypericumspecies AT bridir antioxidantactivityinsouthernbrazilhypericumspecies AT dutrafilhocs antioxidantactivityinsouthernbrazilhypericumspecies AT lissie antioxidantactivityinsouthernbrazilhypericumspecies
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ANTIOXIDANT ACTIVITYIN SOUTHERN BRAZIL HYPERICUM SPECIES

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