Research Status of High-Intensity Pulsed Electric Field (PEF) Equipment and its Application on Food Processing

2014 ◽  
Vol 915-916 ◽  
pp. 331-335
Author(s):  
Rui Wen Yang ◽  
Jia Wang ◽  
Yan Jin ◽  
Song Yi Lin
Keyword(s):  
Electric Field ◽  
Food Processing ◽  
High Intensity ◽  
Treatment Time ◽  
Pulsed Electric Field ◽  
Short Treatment ◽  
Research Status ◽  
Chamber Pump ◽  
Cooling Coil ◽  
Short Treatment Time

Due to short treatment time, the quality change of food caused by heat can be reduced, high-intensity pulsed electric field (PEF) has been widely used, especially in food industry. PEF system consists of PEF generator, treatment chamber, pump, cooling coil, container and monitoring system. The research status of PEF generator, pulses waveforms, treatment chamber and electrodes were discussed. And the application of PEF on food processing was summarized.

Increased Inactivation of Exopolysaccharide-Producing Pediococcus parvulus in Apple Juice by Combined Treatment with Enterocin AS-48 and High-Intensity Pulsed Electric Field

2010 ◽  
Vol 73 (1) ◽  
pp. 39-43 ◽  
Author(s):  
PILAR MARTÍNEZ VIEDMA ◽  
ANGEL SOBRINO LÓPEZ ◽  
NABIL BEN OMAR ◽  
HIKMATE ABRIOUEL ◽  
ROSARIO LUCAS LÓPEZ ◽  
...  
Keyword(s):  
Electric Field ◽  
High Intensity ◽  
Apple Juice ◽  
Cyclic Peptide ◽  
Treatment Time ◽  
Combined Treatment ◽  
Storage Period ◽  
Pulsed Electric Field ◽  
Bipolar Mode ◽  
The Stability

The cyclic peptide bacteriocin enterocin AS-48 was tested (at final concentrations of 0.175, 0.613, and 1.05 AU/ml) against the exopolysaccharide-producing cider spoilage strain Pediococcus parvulus 48 in apple juice in combination with high-intensity pulsed electric field (HIPEF) treatment (35 kV/cm and 150 Hz for 4 μs and bipolar mode). The effect of the combined treatments was studied by surface response methodology, with AS-48 concentration and HIPEF treatment time as process variables. A bacteriocin concentration of 0.613 AU/ml in combination with HIPEF treatment time of 1,000 μs reduced the population of pediococci by 6.6 log cycles in apple juice and yielded an apple juice that was free from pediococci during a 30-day storage period at 4 and 22°C. In contrast, application of HIPEF treatment alone had no effect on the surviving pediococci during storage of juice at 22°C. The combined treatment significantly improved the stability of the juice against spoilage by exopolysaccharide-producing P. parvulus.

Pulsed electric field: A potential alternative towards a sustainable food processing

2021 ◽  
Author(s):  
Rai Naveed Arshad ◽  
Zulkurnain Abdul-Malek ◽  
Ume Roobab ◽  
Muhammad Abdullah Munir ◽  
Amirreza Naderipour ◽  
...  
Keyword(s):  
Electric Field ◽  
Food Processing ◽  
Pulsed Electric Field ◽  
Sustainable Food ◽  
Potential Alternative

scholarly journals Pulsed Electric Field (PEF) Enhances Iron Uptake by the Yeast Saccharomyces cerevisiae

Biomolecules ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 850
Author(s):  
Karolina Nowosad ◽  
Monika Sujka ◽  
Urszula Pankiewicz ◽  
Damijan Miklavčič ◽  
Marta Arczewska
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Electric Field ◽  
Metal Ion ◽  
Treatment Time ◽  
Control Sample ◽  
Pulsed Electric Field ◽  
Yeast Cells ◽  
Iron Ions ◽  
Metal Ion Binding ◽  
Yeast Saccharomyces Cerevisiae

The aim of the study was to investigate the influence of a pulsed electric field (PEF) on the level of iron ion accumulation in Saccharomyces cerevisiae cells and to select PEF conditions optimal for the highest uptake of this element. Iron ions were accumulated most efficiently when their source was iron (III) nitrate. When the following conditions of PEF treatment were used: voltage 1500 V, pulse width 10 μs, treatment time 20 min, and a number of pulses 1200, accumulation of iron ions in the cells from a 20 h-culture reached a maximum value of 48.01 mg/g dry mass. Application of the optimal PEF conditions thus increased iron accumulation in cells by 157% as compared to the sample enriched with iron without PEF. The second derivative of the FTIR spectra of iron-loaded and -unloaded yeast cells allowed us to determine the functional groups which may be involved in metal ion binding. The exposure of cells to PEF treatment only slightly influenced the biomass and cell viability. However, iron-enriched yeast (both with or without PEF) showed lower fermentative activity than a control sample. Thus obtained yeast biomass containing a high amount of incorporated iron may serve as an alternative to pharmacological supplementation in the state of iron deficiency.

Sign in / Sign up

Export Citation Format

Share Document