info:eu-repo/semantics/lecture
Application of vacuum pulse and moderate electric field in osmodehydration of apple using concentrated juice.
Autor
Moreno-Cuevas, Jorge José
Estuardo-Guerra Valle, María
Figueroa-Pino, Pilar
Paredes-Díaz, Valentina
Petzold, Guillermo
Institución
Resumen
The moderate electric field (MEF) is an emerging technology
in the food industry, which consists of an alternating
electrical current through food; the main purpose is heating
food with the inner energy generated. This technology combined
with osmotic dehydration assisted with vacuum pulse
accelerates the mass transfer, due to electroporation effect in
the cell membrane of vegetable tissue. The aim was to study
the effect of osmotic treatment with vacuum pulsed and moderate
electric field using concentrated pomegranate juice as
osmotic agent obtaining dehydrate apple slices (cv. Granny
Smith). The apple samples were submerged in pomegranate
juice of 60 °Brix at 50°C for 300 minutes. Osmotic dehydration
with vacuum pulse (PVOD) and osmotic dehydration
with vacuum pulse assisted by moderate electric field
(PVOD /MEF) were applied. The kinetics of mass transfer
showed a balance between the water loss and solid gain, the
balance was reached at 90 minutes; which is consistent with
prior studies. Apple slices with PVOD/MEF had the highest
gain than the ones just with PVOD, due to 50 mbar pressure
applied 5 minutes prior to MEF, wich its intensity was 2.6
V/cm. Results showed there was a significant gain of sol-
55 FONDECYT FONDECYT