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References in periodicals archive ?
The antioxidant activity of Bacillus clausii KP10 extracts was investigated by measuring their scavenging ability to 1, 1-diphenyl-2-picrylhydrazyl stable free radicals (DPPH).
DPPH stable free radical method is a sensitive way to determine the antioxidant activity of plant extracts (Bhat et al., 2016).
Consequently, all test systems using a stable free radical give information on the radical scavenging or antiradical activity, and in many cases, it does not correspond to the antioxidant activity.
Bios M.S., "Antioxidant determinations by the use of a stable free radical," Nature, 181:1199-1200 (1958).
"The most important aim of this research was to better understand the development of stable free radicals during the roasting process and the possible influence exerted by developed radicals on the well-documented coffee antioxidant properties.
It is the simplest method developed to determine the antioxidant activity using a stable free radical, 1,1-diphenyl-2-picryl-hydrazyl(DPPH) with specific absorption maxima at 517 nm.
Maleic anhydride (MA, 99.9%) and stable free radical 2,2,6,6-tetramethylpiperidinyloxy (TEMPO) were purchased from Aldrich and used without further purification.
DPPH, a purple-colored stable free radical, was reduced into the yellow-colored diphenylpicryl hydrazine; the color intensity of the reaction mixture was measured spectrophotometrically at 510 nm.
DPPH was prepared in a concentration of 0.5, 5, and 10 mg/mL methanol (as the source of stable free radical).
The ability to scavenge the stable free radical 1,1-diphenyl-2-picrylhydrazyl ([DPPH.sup.o]) was determined based on the method of Ohinishi et al(Ohinishi et al., 1994).with minor modifications.
After using the staining assay, quantization of the free radical scavenging capabilities is possible by using DPPH, a stable free radical to measure the antioxidant activity.
Georges, "Rapid Additive-Free TEMPO-Mediated Stable Free Radical Polymerizations of Styrene," J.