Abstract
Four different assays (the Folin-Ciocalteu, DPPH, enzymatic method, and inhibitory activity on lipid peroxidation) based on radically different physicochemical principles and normally used to determine the antioxidant activity of food have been confronted and utilized to investigate the antioxidant activity of fruits originated from Brazil, with particular attention to more exotic and less-studied species (jurubeba, Solanum paniculatum; pequi, Caryocar brasiliense; pitaya, Hylocereus undatus; siriguela, Spondias purpurea; umbu, Spondias tuberosa) in order to (i) verify the correlations between results obtained by the different assays, with the final purpose to obtain more reliable results avoiding possible measuring-method linked mistakes and (ii) individuate the more active fruit species. As expected, the different methods give different responses, depending on the specific assay reaction. Anyhow all results indicate high antioxidant properties for siriguela and jurubeba and poor values for pitaya, umbu, and pequi. Considering that no marked difference of ascorbic acid content has been detected among the different fruits, experimental data suggest that antioxidant activities of the investigated Brazilian fruits are poorly correlated with this molecule, principally depending on their total polyphenolic content.
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Claims 9
Claim · model-written summary
Different antioxidant assays gave different responses.
Verbatim
e0“the different methods give different responses, depending on the specific assay reaction”
Claim · model-written summary
Siriguela fruit had high antioxidant properties.
Verbatim
e0“all results indicate high antioxidant properties for siriguela and jurubeba”
Claim · model-written summary
Jurubeba fruit had high antioxidant properties.
- Taxon
- jurubeba
Solanum paniculatume0 - Outcome
- high antioxidant propertiese0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all results indicate high antioxidant properties for siriguela and jurubeba”
Claim · model-written summary
Pitaya fruit had poor antioxidant values.
Verbatim
e0“poor values for pitaya, umbu, and pequi”
Claim · model-written summary
Umbu fruit had poor antioxidant values.
Verbatim
e0“poor values for pitaya, umbu, and pequi”
Claim · model-written summary
Pequi fruit had poor antioxidant values.
Verbatim
e0“poor values for pitaya, umbu, and pequi”
Claim · model-written summary
Ascorbic acid content showed no marked difference among the fruit species.
Verbatim
e0“no marked difference of ascorbic acid content has been detected among the different fruits”
Claim · model-written summary
Fruit antioxidant activities were poorly correlated with ascorbic acid content.
Verbatim
e0“antioxidant activities of the investigated Brazilian fruits are poorly correlated with this molecule”
Claim · model-written summary
Fruit antioxidant activities depended principally on total polyphenolic content.
Verbatim
e0“antioxidant activities of the investigated Brazilian fruits are poorly correlated with this molecule, principally depending on their total polyphenolic content”