Suchergebnisse

[EN] 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°Brix, 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. ; The authors Urszula Tylewicz and Marco Dalla Rosa want to thank for the financial support of this project provided by funding bodies within the FP7 ERA-Net CORE Organic Plus, and with cofunds from the European Commission (this project has received funding from the European Union's 7th Framework Programme under grant agreement No 618107.). The author Marta Castro-Giraldez wants to thank the UPV Postdoctoral Program (PAID-10-14) of the Universidad Politecnica de Valencia for its support. The author Maria Victoria Traffano Schiffo wants to thank the FPI Predoctoral Program of the Universidad Politecnica de Valencia for support her PhD studies, ERASMUS PRACTICAS program to finance her mobility to Italy and also Silvia Tappi and Wei Luo for their cooperation during the experiment. ; Traffano-Schiffo, MV.; Tylewicz, U.; Castro Giraldez, M.; Fito Suñer, PJ.; Ragni, L.; Dalla Rosa, M. (2016). Effect of pulsed electric fields pre-treatment on mass transport during the osmotic dehydration of organic kiwifruit. Innovative Food Science & Emerging ...