Antioxidant and free radical scavenging activities of plant extracts used in traditional medicine in Mexico
Por:
Ruiz-Teran, F, Medrano-Martinez, A, Navarro-Ocana, A
Publicada:
17 jun 2008
Resumen:
Twenty-two species of medicinal plants collected in the Mexican state of Moreios were selected to evaluate their free radical scavenging and antioxidant activities. The extracts from the aerial parts of the plants were obtained using hexane, acetone and methanol (66 extracts). The initial qualitative screening of antioxidants was made using two TLC methods against the stable DPPH (1,1-diphenyl-2picrylhydrazyl-hydrate) and beta-carotene-linoleic acid bleaching assay. All the extracts displayed antioxidant activity. However, the methanol extracts appeared to have the highest antioxidant activity, so they were examined further. The quantitative assays against DPPH radical, beta-carotene-linoleic acid bleaching and total amount of phenols in the methanol extracts (TPME) showed nine plants as having the highest scavenging and antioxidant activities. For the nine methanolic extracts analysed, a clear relation between the total phenolic content of the extracts and their antioxidant activity w
Filiaciones:
Ruiz-Teran, F:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, Mexico
Medrano-Martinez, A:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, Mexico
Navarro-Ocana, A:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, Mexico
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