Pulsed Power Technology

Akiyama, H.; Katsuki, S.; Redondo, L. M.; Akiyama, Masahiro; Pemen, A.J.M.; Huiskamp, T.; Beckers, Frank; Heesch, E.J.M. van; Winands, G.J.J.; Voeten, S.J.; Liu, Zhen; Bree, J.W.M. van; Xiao, Shu; Petrella, Ross Aaron

doi:10.1007/978-4-431-56095-1_2

Cited by 9 publications

(12 citation statements)

References 35 publications

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“…Compact pulsed power generators have been developed for applications in food processing through the poration of cell membranes or conformational change in proteins. These applications demand an intense electric field with a short rise time and an optimum pulse width for each application [ 4 ]. In order to meet these demands, many types of pulsed power generators have been developed and applied to the applications.…”

Section: Pulsed Power Generators For Food Processingmentioning

confidence: 99%

“…However, the output voltage is critically damped when using the pulsed power generator with a single capacitor and inductor. The output voltage waveforms can be changed from critically dumping (double-exponential-shaped) to square (constant in an arbitrary period) by pulsed power sources with multiple elements; such circuits are called pulse-forming networks (PFNs), whose transmission line (distributed constant circuit) is also used as pulse-forming lines (PFLs) [ 4 , 25 ].…”

Section: Pulsed Power Generators For Food Processingmentioning

confidence: 99%

“…Pulsed power is the technique of accumulating energy during a relatively long period of time and of releasing the accumulated energy in an extremely short period of time as a high-power pulse composed of a high voltage and a large current but moderately low energy, i.e., low time-averaged power [ 4 ]. When the pulsed high voltage is applied between arbitrarily shaped electrodes, intense pulsed electric fields (PEFs) are produced between the electrodes, which causes biological effects such as electroporation (formation of pores) of cell membranes [ 5 ] and conformational change in proteins [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…For pulsed power generators used in food processing, it is important to design them with repetitive high-voltage outputs with an optimum amplitude of voltage and waveform shapes, in order to deliver moderate pulsed power into the biologic loads [ 4 ]. This energy flow can be based on simple circuits consisting of passive discrete resistive-inductive-capacitive elements, transformers (in a lumped constant circuit) or transmission lines (in a distributed constant circuit) and switches, which transfer the energy stored in the electric fields of capacitors or the magnetic fields of coils [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Pulsed Power Applications for Protein Conformational Change and the Permeabilization of Agricultural Products

et al. 2021

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Pulsed electric fields (PEFs), which are generated by pulsed power technologies, are being tested for their applicability in food processing through protein conformational change and the poration of cell membranes. In this article, enzyme activity change and the permeabilization of agricultural products using pulsed power technologies are reviewed as novel, nonthermal food processes. Compact pulsed power systems have been developed with repetitive operation and moderate output power for application in food processing. Firstly, the compact pulsed power systems for the enzyme activity change and permeabilization are outlined. Exposure to electric fields affects hydrogen bonds in the secondary and tertiary structures of proteins; as a result, the protein conformation is induced to be changed. The conformational change induces an activity change in enzymes such as α-amylase and peroxidase. Secondly, the conformational change in proteins and the induced protein functional change are reviewed. The permeabilization of agricultural products is caused through the poration of cell membranes by applying PEFs produced by pulsed discharges. The permeabilization of cell membranes can be used for the extraction of nutrients and health-promoting agents such as polyphenols and vitamins. The electrical poration can also be used as a pre-treatment for food drying and blanching processes. Finally, the permeabilization of cell membranes and its applications in food processing are reviewed.

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Section: Pulsed Power Generators For Food Processingmentioning

confidence: 99%

Section: Pulsed Power Generators For Food Processingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pulsed Power Applications for Protein Conformational Change and the Permeabilization of Agricultural Products

et al. 2021

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“…Pulsed power is characterized by a high power, high energy density, short rise time, and short pulse width. Applying pulsed power to living organisms creates instantaneous extreme conditions (including ultra-high voltages, ultra-high temperatures, and ultra-thermal nonequilibrium), thereby inducing extraordinary phenomena and reactions [2,3]. An example of this is a study that applied pulsed power to cancer cells to induce apoptosis [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Pulsed Electric Fields on Photosynthesis in Light/Dark-Acclimated Lettuce

et al. 2022

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Recent years have seen numerous studies into how applying pulsed high electric fields (PEF) to living organisms induces various stress reactions. Plants produce glucose through photosynthesis and use this as a source of energy for living, yet there are few studies on the photosynthetic response characteristics when PEF is applied to growing plants. In this study, the photosynthetic response when electric fields of 10 to 100 V/mm were applied to light and dark-acclimated leaves of lettuce was measured by combined gas exchange and chlorophyll fluorescence, and the exposure time was kept constant at 500 s. The responses to PEF with regard to the photosynthetic parameters of electron transfer rate (ETR), non-photochemical quenching (NPQ), photosynthetic rate (A), and transpiration rate (E) were recorded during the experiment. Results showed that PEF can cause both the activation and deactivation of photosynthetic activity in lettuce, that there is an optimum value for activation, and that the application of excessive energy leads to inactivation. This study also found that stomata on both active and deactivated lettuce had been open to a greater extent than lettuce to which PEF had not been applied. All the results of statistical significance in this study were p < 0.05 and p < 0.01.

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From the basic science of biological effects of ultrashort electrical pulses to medical therapies

Schoenbach

2018

Bioelectromagnetics

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This article is based on my presentation at the D'Arsonval Ceremony at the Joint Annual Meeting of the Bioelectromagnetics Society and the European BioElectromagnetics Association in Hangzhou, China, in June of 2017. It describes the pathway from the first studies on the effects of intense, nanosecond pulses on biological cells to the development of medical therapies based on these effects. The motivation for the initial studies of the effects of high voltage, nanosecond pulses on mammalian cells was based on a simple electrical circuit model, which predicted that such pulses allow us to affect not just the plasma membrane but also the subcellular structures. The first experimental study that confirmed this hypothesis was published in 2001 in the Bioelectromagnetics journal. It was followed by a large number of publications that showed that such ultrashort pulses affect cell functions, such as programmed cell death, and, at lower intensity, calcium mobilization from intracellular structures. These basic studies were leading to novel cancer treatments, treatments of cardiac arrhythmia, and advanced wound healing. Further, by reducing the pulse duration into the picosecond range, antenna-based neural stimulation seems to be possible. This manuscript gives an overview of the progress in this field of research in the decade after the initial bioelectric studies with high-voltage, nanosecond pulses, particularly the research performed at the Frank Reidy Research Center for Bioelectrics. It also tells you about my journey and that of my colleagues at the Center for Bioelectrics into and through this fascinating bioelectromagnetics research area. Bioelectromagnetics. 39:257-276, 2018. © 2018 Wiley Periodicals, Inc.

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Pulsed Power Technology

Cited by 9 publications

References 35 publications

Pulsed Power Applications for Protein Conformational Change and the Permeabilization of Agricultural Products

Pulsed Power Applications for Protein Conformational Change and the Permeabilization of Agricultural Products

Influence of Pulsed Electric Fields on Photosynthesis in Light/Dark-Acclimated Lettuce

From the basic science of biological effects of ultrashort electrical pulses to medical therapies

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