Kinetics Profiles in the Reaction of Abts Derived Radicals With Simple Phenols and Polyphenols

Food-derived peptidic antioxidants: A review of their production, assessment, and potential applications

“…In the case of His, a very small, but fast-reacting initial response was reported, followed by a slow reaction process with significant autoacceleration at longer times (Aliaga & Lissi, 2000). Henriquez, Aliaga, and Lissi (2004) also reported a complex reaction Samaranayaka and Li-Chan (2008). mechanism between the ABTS radical cations and polyphenols.…”

“…They found that the reaction between substrate and ABTS radical occurs in several steps, where the most reactive hydroxyl groups donate hydrogen atoms first, followed by less reactive ones that are present in the polyphenol complex. Therefore, the total reaction in the case of the polyphenolic compounds appears to take a longer time to complete when compared to the reactivity of compounds such as Trolox, which happens almost instantaneously (Henriquez et al, 2004).…”

Protective effect of placenta extracts against nitrite-induced oxidative stress in human erythrocytes

“…In order to assess antioxidant properties of HPEs and separate fractions, we used the method based on the ability to inhibit the ABTS + radical. Kinetics of ABTS + radical cation reduction measured as the percentage inhibition of absorbance at 734 nm includes 2 phases due to the presence of rapid-and slow-reducing antioxidants [9,16]. Activity of antioxidants responsible for rapid reduction (such as ascorbic acid, uric acid, α-tocopherol, amino acids containing SH groups, reduced glutathione, phenol compounds and ubiquinones) was evaluated by decolorization during the first 10 s. Activity of antioxidants responsible for slow reduction was estimated by decay during the next 390 s (Fig.…”

Phenolic profile and antioxidant activity of Capparis spinosa seeds harvested from different wild habitats

“…The level and rapidity with which the phenolic compounds quench the ABTS radical cation chromophores are the principal criteria used to assess their relative antioxidant capacity compared to a standard antioxidant, Trolox (Roginsky and Lissi, 2005). Nevertheless, many researchers have reported that the kinetics of the reaction between the ABTS radical cations and phenolic compounds are relatively complex (Henriquez et al, 2004).…”