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Effect of pulsed electric fields pre-treatment on mass transport during the osmotic dehydration of organic kiwifruit

Traffano-Schiffo, Maria Victoria; Tylewicz, Urszula; Castro-Giraldez, Marta; Fito, Pedro J.; Ragni, Luigi and Dalla Rosa, Marco (2016) Effect of pulsed electric fields pre-treatment on mass transport during the osmotic dehydration of organic kiwifruit. Innovative Food Science and Emerging Technologies, 38 (Part A), pp. 243-251.

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Online at: https://www.sciencedirect.com/science/article/pii/S1466856416304702?via%3Dihub

Summary

Recently, some authors have applied pulsed electric fields (PEF) as a pre-treatment of osmotic dehydration,
showing a faster kinetics of dehydration. Osmotic dehydration of fruit tissue shows complex mass transfer mechanism
associated with active and passive transports of the vegetal matrix, usually driven by electrolytes. The aim
of this work was to analyze the effect of different PEF values (100, 250, 400 V/cm) as a pre-treatment of the osmotic
dehydration (61.5 °Bx, up to 120 min) on mass transport mechanism of organic kiwifruit.
A thermodynamic model able to describe the mass transfer and tissue deformation in kiwifruit was developed. It
was possible to conclude that pulsed electric field as a pre-treatment, remove a part of the native electrolytes, reducing
the activity of protein active pumps, leaving alone the passive protein channels as a main mass transmembrane
transport and therefore affecting to the regular functionality of cell homeostasis system


EPrint Type:Journal paper
Keywords:Kiwifruit, Pulsed electric fields, Osmotic dehydration, Mass transfer, Thermodynamics, Phenomenological coefficients
Subjects: Food systems > Processing, packaging and transportation
Research affiliation: European Union > CORE Organic Plus > EcoBerries
Italy > Univ. Bologna
FP7 Grant Agreement Number:618107
DOI:https://doi.org/10.1016/j.ifset.2016.10.011
Deposited By: Tylewicz, Dr Urszula
ID Code:32932
Deposited On:13 Apr 2018 11:14
Last Modified:13 Apr 2018 11:14
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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