Journal ArticleDOI
Antioxidant Activity and Total Phenolics in Selected Fruits, Vegetables, and Grain Products
TLDR
In this article, the antioxidant activity and total phenolics of 28 plant products, including sunflower seeds, flaxseeds, wheat germ, buckwheat, and several fruits, vegetables, and medicinal plants were determined.Abstract:
The antioxidant activities and total phenolics of 28 plant products, including sunflower seeds, flaxseeds, wheat germ, buckwheat, and several fruits, vegetables, and medicinal plants were determined. The total phenolic content, determined according to the Folin−Ciocalteu method, varied from 169 to 10548 mg/100 g of dry product. Antioxidant activity of methanolic extract evaluated according to the β-carotene bleaching method expressed as AOX (Δ log A470/min), AA (percent inhibition relative to control), ORR (oxidation rate ratio), and AAC (antioxidant activity coefficient) ranged from 0.05, 53.7, 0.009, and 51.7 to 0.26, 99.1, 0.46, and 969.3, respectively. The correlation coefficient between total phenolics and antioxidative activities was statistically significant. Keywords: Antioxidant activity; phenolics; medicinal plants; oilseeds; buckwheat; vegetables; fruits; wheat productsread more
Citations
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Journal ArticleDOI
Standardized Methods for the Determination of Antioxidant Capacity and Phenolics in Foods and Dietary Supplements
TL;DR: Methods available for the measurement of antioxidant capacity are reviewed, presenting the general chemistry underlying the assays, the types of molecules detected, and the most important advantages and shortcomings of each method.
Journal ArticleDOI
Antioxidant activity of plant extracts containing phenolic compounds
Marja P Kähkönen,Anu Hopia,Heikki Vuorela,Jussi-Pekka Rauha,Kalevi Pihlaja,Tytti S. Kujala,Marina Heinonen +6 more
TL;DR: 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 and potato peel and beetroot peel extracts showed strong antioxidant effects.
Book ChapterDOI
Ferric reducing/antioxidant power assay: direct measure of total antioxidant activity of biological fluids and modified version for simultaneous measurement of total antioxidant power and ascorbic acid concentration
Iris F.F. Benzie,J. J. Strain +1 more
TL;DR: The ferric reducing/antioxidant power (FRAP) assay is a recently developed, direct test of “total antioxidant power” that facilitates experimental and clinical studies investigating the relationship among antioxidant status, dietary habits, and risk of disease.
Journal ArticleDOI
Oxidative stress and neurodegenerative diseases: a review of upstream and downstream antioxidant therapeutic options.
TL;DR: Recognition of upstream and downstream antioxidant therapy to oxidative stress has been proved an effective tool in alteration of any neuronal damage as well as free radical scavenging.
Journal ArticleDOI
Dietary polyphenols and the prevention of diseases
TL;DR: Experimental studies on animals or cultured human cell lines support a role of polyphenols in the prevention of cardiovascular diseases, cancers, neurodegenerative diseases, diabetes, or osteoporosis, but no clear associations have been found between cancer risk and polyphenol consumption.
References
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Journal Article
Colorimetry of Total Phenolics with Phosphomolybdic-Phosphotungstic Acid Reagents
TL;DR: In this paper, the use of Folin-Ciocalteu reagent rather than the FolinDenis reagent, gallic acid as a reference standard, and a more reproducible time-temperature color development period was investigated.
Journal ArticleDOI
Flavonoids—Chemistry, metabolism, cardioprotective effects, and dietary sources
N.C. Cook,Samir Samman +1 more
TL;DR: The structural requirements for the antioxidant and free radical scavenging functions of flavonoids include a hydroxyl group in carbon position three, a double bond between carbon positions two and three, carbonyl groups in carbon positions four, and polyhydroxylation of the A and B aromatic rings.
Journal ArticleDOI
The antioxidants of higher plants
TL;DR: The evidence supports at least a partial antioxidant role in vivo for many classes of plant metabolite, and many other compounds as potential antioxidants can be inferred by their similarity to synthetic antioxidants of related structure.
Journal ArticleDOI
Total Antioxidant Capacity of Fruits
TL;DR: In this article, the total antioxidant activity of 12 fruits and 5 commercial fruit juices was measured using automated oxygen radical absorbance capacity (ORAC) assay, and strawberry had the highest ORAC activity (micromoles of Trolox equivalents per gram).
Journal ArticleDOI
Oxygen Radical Absorbing Capacity of Anthocyanins
TL;DR: Using automated oxygen radical absorbance capacity (ORAC) assay developed in this paper, the authors determined the antioxidant capacity of 14 anthocyanins including the aglycons delphinidin, cyanindin, pelargonin, malvidin, peonidin and their derivatives with different sugar linkages.