Food Preservation by Pulsed Electric Fields: An Engineering Perspective

Peña, Mariana Morales-de la; Elez-Martı́nez, Pedro; Martı́n-Belloso, Olga

doi:10.1007/s12393-011-9035-7

Cited by 44 publications

(19 citation statements)

References 91 publications

(130 reference statements)

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“…It also offers great promise as a technique for gene therapy without the risks caused by viral vectors (DNA electrotransfer) [5]. In clinical medicine, irreversible electroporation is being investigated as a method for tissue ablation (nonthermal electroablation) [6], whereas in biotechnology, it is useful for extraction of biomolecules [7] and for microbial deactivation, particularly in food preservation [8].…”

Section: Introductionmentioning

confidence: 99%

Cell membrane electroporation- Part 1: The phenomenon

Kotnik

Kramar

Pucihar

et al. 2012

IEEE Electr. Insul. Mag.

412

212

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Section: Introductionmentioning

confidence: 99%

Cell membrane electroporation- Part 1: The phenomenon

Kotnik

Kramar

Pucihar

et al. 2012

IEEE Electr. Insul. Mag.

412

212

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“…Since, electroporation has been demonstrated to be a versatile method for both in vitro and in vivo settings it has been successfully applied to various domains such as medicine (e.g. human and veterinary oncology) [22-27], food processing [28] and microbial inactivation in water treatment [29]. …”

Section: Introductionmentioning

confidence: 99%

Modeling of electric field distribution in tissues during electroporation

et al. 2013

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BackgroundElectroporation based therapies and treatments (e.g. electrochemotherapy, gene electrotransfer for gene therapy and DNA vaccination, tissue ablation with irreversible electroporation and transdermal drug delivery) require a precise prediction of the therapy or treatment outcome by a personalized treatment planning procedure. Numerical modeling of local electric field distribution within electroporated tissues has become an important tool in treatment planning procedure in both clinical and experimental settings. Recent studies have reported that the uncertainties in electrical properties (i.e. electric conductivity of the treated tissues and the rate of increase in electric conductivity due to electroporation) predefined in numerical models have large effect on electroporation based therapy and treatment effectiveness. The aim of our study was to investigate whether the increase in electric conductivity of tissues needs to be taken into account when modeling tissue response to the electroporation pulses and how it affects the local electric distribution within electroporated tissues.MethodsWe built 3D numerical models for single tissue (one type of tissue, e.g. liver) and composite tissue (several types of tissues, e.g. subcutaneous tumor). Our computer simulations were performed by using three different modeling approaches that are based on finite element method: inverse analysis, nonlinear parametric and sequential analysis. We compared linear (i.e. tissue conductivity is constant) model and non-linear (i.e. tissue conductivity is electric field dependent) model. By calculating goodness of fit measure we compared the results of our numerical simulations to the results of in vivo measurements.ResultsThe results of our study show that the nonlinear models (i.e. tissue conductivity is electric field dependent: σ(E)) fit experimental data better than linear models (i.e. tissue conductivity is constant). This was found for both single tissue and composite tissue. Our results of electric field distribution modeling in linear model of composite tissue (i.e. in the subcutaneous tumor model that do not take into account the relationship σ(E)) showed that a very high electric field (above irreversible threshold value) was concentrated only in the stratum corneum while the target tumor tissue was not successfully treated. Furthermore, the calculated volume of the target tumor tissue exposed to the electric field above reversible threshold in the subcutaneous model was zero assuming constant conductivities of each tissue.Our results also show that the inverse analysis allows for identification of both baseline tissue conductivity (i.e. conductivity of non-electroporated tissue) and tissue conductivity vs. electric field (σ(E)) of electroporated tissue.ConclusionOur results of modeling of electric field distribution in tissues during electroporation show that the changes in electrical conductivity due to electroporation need to be taken into account when an electroporation based treatment is planned or investigate...

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“…Another nonthermal technique is the PEF system that has been extensively studied for food processing for more than 30 years. The basic principle of this system is the application of short pulses of high electric fields (voltage intensity in the order of 20–80 kV/cm) with duration of micro‐ to milliseconds delivered to a product placed between a set of two electrodes (Morales‐de la Peña, Elez‐Martínez, & Martín‐Belloso, ).…”

Section: Fundamentals and Applicationsmentioning

confidence: 99%

Discussion between alternative processing and preservation technologies and their application in beverages: A review

Escajeda

Hernandez

Rodríguez-Jasso

et al. 2017

J Food Process Preserv

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The alternative technologies discussed in this review are able to eliminate pathogenic bacteria while retaining bioactive compounds such as anthocyanins, phenols, pigments, and vitamins, improve the extraction processes of fruit or vegetable juices. The use of nonthermal processing technologies in beverages might provide a higher quality value to the final product and consumers tended to prefer more natural products with minimum preservative substances. This review is analyze and discuss the advantages and disadvantages of alternative technologies applied in beverages, evaluating the parameters that can optimize beverage processing such as time, temperature, pressure, frequency, tension, among others. Additionally, finding solutions to beverage processing issues will be considered analyzing the results obtained with other applied methods, and an overview of new strategies such as microfiltration or the combination of two alternative technologies to improve the quality of the final product will also be evaluated. Practical applications The applications of alternative technologies mentioned in this article, are a feasible option for the preservation of beverages in the area of industry. The capacity of each of them has been demonstrated, in addition to the use of microfiltration and ultrafiltration, but the combination between them sounds very encouraging to achieve the quality and safety of beverages, with an extended shelf life and greater protection of its main components. This provides a wide range of research opportunities for any type of beverage.

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Food Preservation by Pulsed Electric Fields: An Engineering Perspective

Cited by 44 publications

References 91 publications

Cell membrane electroporation- Part 1: The phenomenon

Cell membrane electroporation- Part 1: The phenomenon

Modeling of electric field distribution in tissues during electroporation

Discussion between alternative processing and preservation technologies and their application in beverages: A review

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