Free radical scavenging behavior of ten exotic tropical fruits extracts

Abstract

The antiradical capacity (radical scavenger capacity, RSC) of bacuri, cajá, camu-camu, carnauba, gurguri, jabuticaba, jambolão, juçara, murta, black puçá and puçá were studied using the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•) assay. To determine their RSC, the second-order rate constants (k 2 ) for the oxidation of these extracts by DPPH• were calculated. The values of k 2 were compared to natural and synthetic antioxidants. The k 2 values (L/mol g s), in methanol at 25°C, were 69.52, 26.03, 22.20, 18.04, 17.23, 16.56, 15.60, 10.03, 7.72 and 4.15 for camu-camu, murta, gurguri, carnauba, jabuticaba, black puçá, jambolão, cajá, juçara and bacuri.

Antifungal and antioxidant activity of fatty acid methyl esters from vegetable oils

“…Thus, antioxidants act to prevent or avoid incidence of cancer, diabetes, atherosclerosis, coronary heart disease and the aging process (Rufino et al 2011). Natural substances with known antioxidant potential are phenolic compounds (flavonoids and phenolic acids), vitamins A, C, E and carotenoids which, in different proportions and quantities, can be obtained from foods of plant origin, such as vegetables, fruits, teas, herbs, beans and oil seeds (Ara andNur 2009, Arnao et al 2001).…”

Effect of Heat on Antioxidant Activity of Some Tropical Leafy Vegetables

“…Among the biologically active constituents, natural antioxidants have attracted interest because of their safety and potential therapeutic effect. These antioxidants are capable of acting as free radical scavengers, peroxide decomposers, singlet oxygen quenchers, enzyme inhibitors and synergists (Rufino et al, 2010). However, several studies have reported that the majority of the antioxidant activity may be from compounds such as flavonoids, isoflavone, flavones, anthocyanin, catechin and isocatechin, which are phenolic derivatives rather than from vitamins C, E and β-carotene (Yang et al, 2002, Sun et al, 2002.…”

Antioxidant properties, physico-chemical characteristics and proximate composition of five wild fruits of Manipur, India

“…Within the biologically active components, natural antioxidants have attracted interest because of their safety and potential therapeutic effect (Rufino et al 2011). The interest of consumers towards lesser known wild edible fruits has arisen due to their various health beneficial effects and organoleptic properties.…”