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Acoustic impulse response in apple tissues treated by pulsed electric field

Author:
Grimi, Nabil, Mamouni, Fatine, Lebovka, Nikolai, Vorobiev, Eugene, Vaxelaire, Jean
Source:
Biosystems engineering 2010 v.105 no.2 pp. 266-272
ISSN:
1537-5110
Subject:
acoustic properties, apples, plant tissues, pulsed electric fields, electrical treatment, food processing, food processing quality
Abstract:
This work discusses application of acoustically-derived index of disintegration for characterization of pulsed electric field (PEF)-treated whole apples in aqueous media. It was demonstrated that PEF efficiency was dependent on the conductivity of the aqueous media and orientation of the apple with respect to the external field. Electrical treatment also stimulated transient changes after PEF application in acoustic disintegration index (Za). Relation between the conductivity disintegration index (Zc) and Za was established. A non-linear relation between Zc and Za was observed and it was demonstrated that the Za value seems to be a better measure of the real degree of damage than the widely used value of Zc.
Agid:
778360