title: Quality changes in yogurt during storage in different packaging materials.
abstract: The influence of packaging polymers (polypropylene or polystyrene) on the sensory and physicochemical characteristics of flavoured stirred yogurts with either 0% or 4%-fat content was investigated during the 28 days of storage at 4°C. Regardless of the packaging type, complex viscosity and thickness perception increased during storage due to exopolysaccharide production, whereas the pH of yogurts decreased. Packaging type had a greater impact on 0%-fat yogurts than on 4%-fat yogurts for both sensory and physicochemical characteristics. During storage, 0%-fat yogurt conditioned in glass displayed the lowest aroma quantity decrease of the three types of packaging, in accordance with the olfactory properties. However, between the two polymer types, polystyrene packaging seemed to be preferable for limiting aroma compound losses and subsequent fruity note intensities, and for avoiding the development of odour and aroma defects. Less significant packaging effect was observed for 4%-fat yogurts.
authors.affiliation: UMR 782 Génie et Microbiologie des Procédés Alimentaires, AgroParisTech, INRA, 78850 Thiverval-Grignon, France. Electronic address: seanne@grignon.inra.fr.
authors.forename: A
authors.initials: A
authors.lastname: Saint-Eve
authors.affiliation: UMR 782 Génie et Microbiologie des Procédés Alimentaires, AgroParisTech, INRA, 78850 Thiverval-Grignon, France.
authors.forename: C
authors.initials: C
authors.lastname: Lévy
authors.affiliation: UMR 782 Génie et Microbiologie des Procédés Alimentaires, AgroParisTech, INRA, 78850 Thiverval-Grignon, France.
authors.forename: M
authors.initials: M
authors.lastname: Le Moigne
authors.affiliation: UMR 1211 Science de l'Aliment et de l'Emballage - INRA Massy, France.
authors.forename: V
authors.initials: V
authors.lastname: Ducruet
authors.affiliation: UMR 782 Génie et Microbiologie des Procédés Alimentaires, AgroParisTech, INRA, 78850 Thiverval-Grignon, France.
authors.forename: I
authors.initials: I
authors.lastname: Souchon
keywords: Aroma release; Packaging polymer; Sensory profile; Yogurt