Kinetic Model of Lipid Oxidation in Foods

Abstract

A general mathematical model in the same form with the logistic equation simulated lipid oxidation in food systems. Almost perfect agreement was found between the model and seventeen sets of data from the literature, obtained with egg yolk, restructured beef and pork nuggets, cooked pork meat, iced gutted dogfish, frozen mackerel fillets and ground raw poultry meat. A simple method was described for the evaluation of the numerical values of the model parameters.Variations of these numerical values were also associated with varying pretreatment and storage conditions.

Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying.

“…The oxidation kinetics of the bulk n-6 PUFA could be expressed by the equation of the autocatalytic type in terms of the fraction of unoxidized PUFA, Y (Özilgen and Özilgen, 1990;Adachi et al, 1995).…”

Suppressive Effect of Alkyl Ferulate on the Oxidation of Linoleic Acid

“…The kinetics for lipid oxidation have been extensively studied, 6,7) and the entire lipid oxidation process has been described by a kinetic expression of the autocatalytic type in terms of the fraction of the unoxidized substrate. 6) This expression was applied to the entire oxidation process of n-6 unsaturated fatty acids and their alkyl esters and acylglycerols, and the kinetic parameters were evaluated.…”

“…The kinetics for lipid oxidation have been extensively studied, 6,7) and the entire lipid oxidation process has been described by a kinetic expression of the autocatalytic type in terms of the fraction of the unoxidized substrate. 6) This expression was applied to the entire oxidation process of n-6 unsaturated fatty acids and their alkyl esters and acylglycerols, and the kinetic parameters were evaluated. 8,9) The oxidation processes of linoleic acid in the presence of ferulic acid and alkyl ferulates were observed in this study, and the applicability of a kinetic equation of the autocatalytic type to the processes was examined.…”

Analytical criteria to quantify and compare the antioxidant and pro-oxidant capacity in competition assays: The bell protection function

“…The abbreviated approach to study the dose-response at one single-time expecting to find linear forms (as described by the non-kinetic approaches) frequently leads to unreliable results and misinterpretations, making it extremely difficult to compare the results from different assays. The preference of apparently simple assays, routinely applicable with minimal calculation requirements, is not very justifiable today, given the availability of computational applications and automatic equipment (such as microplate readers), whose combination provides adequate tools to work with data sets that allow accurate evaluations by the available non-linear modeling (Labuza & Dugan, 1971;Murado & Vázquez, 2010;Terpinc & Abramovič, 2010;Wardhani et al, 2013;Özilgen & Özilgen, 1990). Despite the advisability of using mechanistic or empiric kinetic models as indicated by different authors, researchers continue to use simple calculation alternative methods more often than necessary.…”

“…For example, the power function developed by Terpinc & Abramovič, (2010) is appropriate only to adjust fractional-order kinetic profiles, but fails in the description of first-order processes or sigmoidal profiles. Other empirical approaches such as the Logistic and Weibull equations, that have been transferred from other fields to describe the oxidation action (Murado & Vázquez, 2010;Özilgen & Özilgen, 1990), are more appropriate for modeling processes as the lipid oxidation. Those equation are able to produce key parameters to summarize the responses, such as the asymptote, maximum velocity or the lag-phase, they can characterize the response and help to quantify the effect of OM agents.…”