Antioxidant properties of the principal biogenic amines were determined in vitro by four analytical methods—Folin Ciocalteu, DPPH, enzymatic and inhibition of lipid peroxidation—in order to avoid possible measuring-method linked mistakes. Different results are obtained, depending on the parameters that each of them measures. The combination of the data indicates that all examined amines show an...

Abstract The hydrophilic and lipophilic antioxidant activities due to the main bioactive components present in Spanish tomato paste samples were studied, using standardized fluorescent methods. After extraction, phenolic antioxidants (Folin-Ciocalteu method) total activity (TEAC assay) evaluated, examining differences between extracts corresponding different samples. Total fluorescence spectra ...

The Folin-Ciocalteu assay is a widely used method for measuring the total phenolic content (TPC) in honey, but it can be affected by presence of reducing sugars which lead to interference and an over-estimation its TPC. To optimize honey analysis, effect pH on was investigated. A number scenarios were tested using different concentrations Na2CO3 (0.00%, 0.75%, 0.94%, 7.50%) order minimize sugar...

Olive leaves are rich in phenolic compounds, which give them antioxidant properties that associated with a lower incidence of disease. Therefore, the aim this work was to determine content, activity, and toxicity aqueous extracts olive main Spanish Greek cultivated wild genotypes. For these purposes, ‘Picual’ ‘Arbequina’ from Spain ‘Koronoeiki’ ‘Kalamon’ Greece were collected, as both countries...