title: Shelf-life modeling of bakery products by using oxidation indices.
abstract: The aim of this work was to develop a shelf-life prediction model of lipid-containing bakery products. To this purpose (i) the temperature dependence of the oxidation rate of bakery products was modeled, taking into account the changes in lipid physical state; (ii) the acceptance limits were assessed by sensory analysis; and (iii) the relationship between chemical oxidation index and acceptance limit was evaluated. Results highlight that the peroxide number, the changes of which are linearly related to consumer acceptability, is a representative index of the quality depletion of biscuits during their shelf life. In addition, the evolution of peroxides can be predicted by a modified Arrhenius equation accounting for the changes in the physical state of biscuit fat. Knowledge of the relationship between peroxides and sensory acceptability together with the temperature dependence of peroxide formation allows a mathematical model to be set up to simply and quickly calculate the shelf life of biscuits.
authors.affiliation: Dipartimento di Scienze degli Alimenti, Università di Udine, Via Marangoni 97, 33100 Udine, Italy. sonia.calligaris@uniud.it
authors.forename: Sonia
authors.initials: S
authors.lastname: Calligaris
authors.forename: Lara
authors.initials: L
authors.lastname: Manzocco
authors.forename: Giuditta
authors.initials: G
authors.lastname: Kravina
authors.forename: Maria Cristina
authors.initials: MC
authors.lastname: Nicoli
mesh_terms: D001939:Bread / Q000032:analysis*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D005223:Fats / Q000032:analysis; D005519:Food Preservation; D006801:Humans; D010084:Oxidation-Reduction; D010545:Peroxides / Q000032:analysis; D012677:Sensation; D013696:Temperature; D013997:Time Factors
chemical_list: D005223:Fats; D010545:Peroxides