A method to evaluate capacity and efficiency of water soluble antioxidants as peroxyl radical scavengers

Efficiency and capacity of antioxidant rich foods in trapping peroxyl radicals: A full evaluation of radical scavenging activity

“…The experimental oxygraphic traces were automatically processed by means of a computational procedure to obtain oxygen consumption rates and PRTC and PRTE values on the basis of a rigorous treatment of the kinetic data, see Zennaro et al (2007) and Rossetto et al (2008).…”

“…To evaluate the capacity and efficiency of antioxidants we set up a simple oxygraphic method that, based on a rigorous treatment of the kinetic data relative to the free radical peroxidation of fatty acids, permits to calculate the Peroxyl Radical Trapping Capacity (PRTC), that is the amount of peroxyl radicals trapped by a given amount of antioxidant (usually micromoles of peroxyl radicals trapped by one gram of antioxidant), and Peroxyl Radical Trapping Efficiency (PRTE) that is the reciprocal of IC 50 (Zennaro et al, 2007), where IC 50 is the concentration of antioxidant which provides 50% inhibition. These two parameters can be calculated simultaneously from a single experiment.…”

Design and synthesis of 3-triazolo-coumarins and their applications in scavenging radicals and protecting DNA

“…This formula has been applied to the study of the inhabitation of AAPH-induced oxidation to DNA by homoisoflavonoids [31,32] . R i is equal to the generation rate(R g ) from the decomposition of AAPH{R g =(1.4±0.2)×10 -6 [AAPH]s -1 [30] }. This is because both the sodium salts of DNA and AAPH are dissolved in the same water phase, and radicals generated from AAPH attack DNA in the water phase.…”

“…The Eq. (1) was used to evaluate the antioxidant efficacy through the linear correlation between t inh and the concentration of the antioxidant [30] .…”

Concentração Das Atividades Antioxidantes Em Plantas De Jambu, Cultivadas Sob Adubação Orgânica E Mineral

“…A atividade antioxidante via radical peroxil foi realizada a partir de vários extratos etanólicos, por medida da sua capacidade em inibir a peroxidação do ácido linoléico em um sistema micelar (ZENNARO et al, 2007). O método oxigrafico utilizado foi baseado em uma medida cinética que permite obter a capacidade de 792 capturar um radical peróxido (PRTC) e a eficiência de captura equivalente radical peróxido (ePRTE) dos extratos.…”