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      Antioxidant properties of different cultivars of Portulaca oleracea

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      Food Chemistry
      Elsevier BV

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          Antioxidant activity of plant extracts containing phenolic compounds.

          The antioxidative activity of a total of 92 phenolic extracts from edible and nonedible plant materials (berries, fruits, vegetables, herbs, cereals, tree materials, plant sprouts, and seeds) was examined by autoxidation of methyl linoleate. The content of total phenolics in the extracts was determined spectrometrically according to the Folin-Ciocalteu procedure and calculated as gallic acid equivalents (GAE). Among edible plant materials, remarkable high antioxidant activity and high total phenolic content (GAE > 20 mg/g) were found in berries, especially aronia and crowberry. Apple extracts (two varieties) showed also strong antioxidant activity even though the total phenolic contents were low (GAE < 12.1 mg/g). Among nonedible plant materials, high activities were found in tree materials, especially in willow bark, spruce needles, pine bark and cork, and birch phloem, and in some medicinal plants including heather, bog-rosemary, willow herb, and meadowsweet. In addition, potato peel and beetroot peel extracts showed strong antioxidant effects. To utilize these significant sources of natural antioxidants, further characterization of the phenolic composition is needed.
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            Screening of radical scavenging activity of some medicinal and aromatic plant extracts

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              Antioxidant Activity in Fruits and Leaves of Blackberry, Raspberry, and Strawberry Varies with Cultivar and Developmental Stage

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                Author and article information

                Journal
                Food Chemistry
                Food Chemistry
                Elsevier BV
                03088146
                January 2007
                January 2007
                : 103
                : 3
                : 734-740
                Article
                10.1016/j.foodchem.2006.09.025
                3b42c383-1020-4f23-b30f-920134142e8a
                © 2007

                http://www.elsevier.com/tdm/userlicense/1.0/

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