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

2016 ◽  
Vol 38 ◽  
pp. 243-251 ◽  
Author(s):  
M.V. Traffano-Schiffo ◽  
U. Tylewicz ◽  
M. Castro-Giraldez ◽  
P.J. Fito ◽  
L. Ragni ◽  
...  
Keyword(s):  
Mass Transport ◽  
Electric Fields ◽  
Osmotic Dehydration ◽  
Pulsed Electric Fields ◽  
Pre Treatment

Pulsed electric fields pre-treatment of carrot purees to enhance their polyacetylene and sugar contents

2014 ◽  
Vol 23 ◽  
pp. 79-86 ◽  
Author(s):  
I. Aguiló-Aguayo ◽  
M.B. Hossain ◽  
N. Brunton ◽  
J. Lyng ◽  
J. Valverde ◽  
...  
Keyword(s):  
Electric Fields ◽  
Pulsed Electric Fields ◽  
Pre Treatment

scholarly journals Advanced technologies for cherry processing and packaging

Italus Hortus ◽  
2019 ◽  
Vol 26 ◽  
pp. 51-58
Author(s):  
Marco Dalla Rosa
Keyword(s):  
Shelf Life ◽  
Electric Fields ◽  
Energy Demand ◽  
Cold Plasma ◽  
New Technologies ◽  
Osmotic Dehydration ◽  
Pulsed Electric Fields ◽  
Skin Permeability ◽  
Hypertonic Solution ◽  
Thermal Treatments

The evolution of food technologies through the use of the so-called emerging technologies lays the basis for obtaining products with at least partial stabilization level against microbial alterations with minimal modifications of the intrinsic sensory and nutritional qualities of the finished products. High hydrostatic pressures, pulsed electric fields, cold plasma and osmodehydration can be used for the processing of sweet and sour cherries, with obtaining products of good quality and medium-long shelf-life avoiding highly impacting thermal treatments. High hydrostatic pressure can be used to obtain a partial stabilization of pitted cherries to prolong their shelf-life up to 15 days in refrigerated conditions without any severe thermal treatments. High pressure homogenization could be instead useful to multiple purposes like partial microbial stabilization, viscosity changes and bioactive compounds incapsulation of cherry juices. Water removal without state exchanges can be performed using the direct osmosis dewatering technology. Up to the 70 % of the initial water had been showed to be removed with the immersion of sweet cherries to a Dalla Rosa 58 hypertonic solution taking advantages of the difference of osmotic pressure between the fruits and the solution, even with any increase of temperature and very low energy demand. Since this technology is time consuming, pre-treatments like application of Ultrasounds or Pulsed Electric Fields (PEF) have been successfully applied in fruit osmotic dewatering. Furthermore, combining the osmotic dehydration and vacuum pulses it has been possible to introduce interesting enriching components like bioactive substances, probiotics and vitamins to reinforce the healthy contents of cherries. Eventually, surface treatments could be adopted to optimize the cherry skin permeability. Among the new technologies potentially able to help the sanitation and thus the extension of the cherry shel-life, cold plasma could be applied to decontaminate the fruit surface also in this case without any temperature increase. The packaging of the fresh and finished products through the use of modified atmosphere pakaging (MAP), combined with the choice of the most suitable flexible films can be a further key to improve the shelf life of the products.

scholarly journals Extraction of Antioxidant Compounds and Pigments from Spirulina (Arthrospira platensis) Assisted by Pulsed Electric Fields and the Binary Mixture of Organic Solvents and Water

2021 ◽  
Vol 11 (16) ◽  
pp. 7629
Author(s):  
Francisco J. Martí-Quijal ◽  
Francesc Ramon-Mascarell ◽  
Noelia Pallarés ◽  
Emilia Ferrer ◽  
Houda Berrada ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Binary Mixture ◽  
Electric Fields ◽  
Pulsed Electric Fields ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Total Phenolic Compounds ◽  
Extraction Technology ◽  
Pre Treatment

The application of pulsed electric fields (PEF) is an innovative extraction technology promoting cell membrane electroporation, thus allowing for an efficient recovery, from an energy point of view, of antioxidant compounds (chlorophylls, carotenoids, total phenolic compounds, etc.) from microalgae. Due to its selectivity and high extraction yield, the effects of PEF pre-treatment (3 kV/cm, 100 kJ/kg) combined with supplementary extraction at different times (5–180 min) and with different solvents (ethanol (EtOH)/H2O, 50:50, v/v; dimethyl sulfoxide (DMSO)/H2O, 50:50, v/v) were evaluated in order to obtain the optimal conditions for the extraction of different antioxidant compounds and pigments. In addition, the results obtained were compared with those of a conventional treatment (without PEF pre-treatment but with constant shaking). After carrying out the different experiments, the best extraction conditions to recover the different compounds were obtained after applying PEF pre-treatment combined with the binary mixture EtOH/H2O, 50:50, v/v, for 60–120 min. PEF extraction was more efficient throughout the study, especially at short extraction times (5–15 min). In this sense, recovery of 55–60%, 85–90%, and 60–70% was obtained for chlorophylls, carotenoids, and total phenolic compounds, respectively, compared to the maximum total extracted amount. These results show that PEF improves the extraction yield of antioxidant bioactive compounds from microalgae and is a promising technology due to its profitability and environmental sustainability.

Effects of pulsed electric fields assisted osmotic dehydration on freezing-thawing and texture of apple tissue

2016 ◽  
Vol 183 ◽  
pp. 32-38 ◽  
Author(s):  
Oleksii Parniakov ◽  
Olivier Bals ◽  
Nikolai Lebovka ◽  
Eugene Vorobiev
Keyword(s):  
Electric Fields ◽  
Osmotic Dehydration ◽  
Pulsed Electric Fields ◽  
Apple Tissue

scholarly journals Osmotic dehydration of organic kiwifruit pre-treated by pulsed electric fields: Internal transport and transformations analyzed by NMR

2017 ◽  
Vol 41 ◽  
pp. 259-266 ◽  
Author(s):  
Maria Victoria Traffano-Schiffo ◽  
Luca Laghi ◽  
Marta Castro-Giraldez ◽  
Urszula Tylewicz ◽  
Santina Romani ◽  
...  
Keyword(s):  
Electric Fields ◽  
Osmotic Dehydration ◽  
Pulsed Electric Fields ◽  
Internal Transport
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