Journal
LIFE SCIENCES
Volume 73, Issue 13, Pages 1667-1681Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0024-3205(03)00488-0
Keywords
antioxidant activity; Asteraceae; Bolivia; oxidative stability; plant extracts; radical scavenging activity; Rancimat; total phenolic content
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Fifty-four different extracts of nine Bolivian plants belonging to the family Asteraceae were evaluated for their radical scavenging activity by the DPPH, NBT/hypoxanthine superoxide, and OH/luminol chemiluminescence methods, and for their antioxidant activity by the beta-carotene bleaching test. The total phenolic content was also determined by the Folin-Ciocalteu method, and the oxidative stability by the Rancimat test. Both remarkably high phenolic content and radical scavenging and antioxidant activities were found mainly in the ethyl acetate fractions among the different plant extracts. Some ethyl acetate and even some defatted crude extracts exhibited activities comparable to those of commercial extracts/compounds, thus making it possible to consider some of the studied plants as a potential source of antioxidants of natural origin. (C) 2003 Elsevier Inc. All rights reserved.
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