Nov 21 20192 2 Pulsed electric field and microwave treatment Disintegration of the sunflower cells membrane was carried out due to its electroporation mechanism Due to the pulse nature of electric field the loaded ions under the influence of the force of electric field escape from the structure of olive cells in the direction of the enclosed electric The high electric field intensity square pulses varying in magnitudes in the range of kilovolts with ms to μs pulse widths have been successfully used in many research fields The advancements in power semiconductor devices such as power MOSFETs IGBTs are becoming most suitable for high switching speed high voltage pulse generators

Pulsed Electric Field processing of foods

Pulsed Electric Field (PEF) applications can be utilised to achieve disintegration of biological tissues or microbes Various applications have been identified such as improvement of mass transfer during extraction or drying as well as gentle food preservation The first commercial applications of the technique have been achieved By development of equipment based on state of the semiconductor

Jan 30 2015The incorporation of microwave and pulsed electric field (PEF ) technologies in optimising the extraction of polyphenols from defatted canola seed cake was determined by Box‐Behnken response surface methodology using three parameters of microwave treatment (power time and liquid: solid (L:S) ratio) and four parameters of PEF (ethanol concentration time frequency and voltage)

A lot of effort is put to decrease the energy consumption of drying This effect might be achieved by shift of a drying technology e g from a hot-air to a microwave-vacuum method Moreover an unconventional pre-treatment such as ultrasound or pulsed electric field may modify a cellular tissue what influences drying kinetics of plant tissue

The effects of conventional and microwave heating on the oxidative properties of corn and soybean oil were evaluated The results showed that acid value peroxide value oxidative indices total oxidation value and p-anisidine values changed significantly with the rise in temperature (p 0 05)

Jun 30 2011Influence of Pulsed Electric Field (PEF) treatment on the extraction of lipids from the microalgae Auxenochlorella protothecoides Abstract: Summary form only given Microalgae are a promising source of lipids and biopolymers In most cases algal lipids are stored intracellular During the extraction of intracellular products from cells the cell

The influence of a DC electric field on high power

Observed delay times for high power microwave surface flashover are influenced significantly by the presence of a DC electric field The experimental setup to investigate theses influences is comprised of an S-band magnetron operating at 2 85 GHz with a pulse rise time shortening switch assembly that produces a 50 ns rise time at a ∼ 2 5 MW power level

To examine the hypothesized effect of pulsed fields we applied an auditory discrimination task and determined the participant's current 'Order Threshold' value Following a first test cycle the volunteers had to relax for 50 min while being or not exposed to pulsed electromagnetic fields Subsequently the test was repeated

Plasma Spectroscopy systematically develops the foundations of spectroscopy for plasmas subjected to quasi-monochromatic electric fields in the microwave or visible range Such fields may be due to longitudinal Langmuir waves or low hybrid oscillations which are excited in pulsed discharged or by high-current beams of charged particles

The first reports on Pulsed Electric Fields (PEF) use were published in the 1950s in Ukraine Moldova and Germany but it took several decades to transfer the technology into industrial practice From the 1990s onwards more than 20 research groups have been identifying underlying mechanisms of action influencing parameters and potential applications

Pulsemaster is an innovative company providing Pulsed Electric Field Systems (PEF) for the food industry Applied on potato vegetable fruit and meat products for cell disintegration purposes PEF- treatment leads to more efficient production processes

Nov 04 2005The response of proteins to different forms of stress continues to be a topic of major interest especially with the proliferation of electromagnetic devices conjectured to have detrimental effects on human health In this paper we have performed molecular dynamics simulations on insulin chain-B under the influence of both static and oscillating electric fields ranging from 107 to 109 V/m

INFLUENCE OF TREATMENTS ON THE QUALITY OF BLUEBERRY JUICE 1421 where N 0 and N are the numbers of microorganisms before and after the PEF treatment (CFU/mL) PEF Sterilization Parameters E coli was inoculated into the blueberry juice samples with electric field strengths at 20 25 30 and 35 kV/cm The processing times were 27 54 and 82 μs whereas conduc-

Space charge behavior in cross-linked polyethylene (XLPE) ethylene-propylene rubber (EPR) and multi-layered XLPE/EPR subjected to electric field and temperature has been investigated using the pulsed electro acoustic (PEA) technique A dual-layer structure constituted of two flat sheets where one is XLPE and the other is EPR was used to study the charging properties of the electrode

Pulsed Electromagnetic Fields (PEMF): How They Heal

The use of a specific pulsed electromagnetic field (PEMF) in treating early knee osteoarthritis Trans 56th Annual Orthopaedic Research Society Meeting New Orleans LA (2010) p 1034 3 Pilla et al Electromagnetic fields as first messenger in biological signaling: Application to calmodulin-dependent signaling in tissue repair Biochim

Jun 30 2011Influence of Pulsed Electric Field (PEF) treatment on the extraction of lipids from the microalgae Auxenochlorella protothecoides Abstract: Summary form only given Microalgae are a promising source of lipids and biopolymers In most cases algal lipids are stored intracellular During the extraction of intracellular products from cells the cell

A lot of effort is put to decrease the energy consumption of drying This effect might be achieved by shift of a drying technology e g from a hot-air to a microwave-vacuum method Moreover an unconventional pre-treatment such as ultrasound or pulsed electric field may modify a cellular tissue what influences drying kinetics of plant tissue

Pulsed Electric Field (PEF) applications can be utilised to achieve disintegration of biological tissues or microbes Various applications have been identified such as improvement of mass transfer during extraction or drying as well as gentle food preservation The first commercial applications of the technique have been achieved By development of equipment based on state of the semiconductor

Feb 19 2018There are several factors that influence the results from the pulsed electric field on the microorganisms These factors are related with the parameters of the process (time field intensity temperature and number of pulses) to the characteristics of the product and the characteristics of the microorganisms present in the product [ 27 ]

4 Effects of Electric Magnetic and Electromagnetic Fields on the Diurnal Rhythm of Melatonin Secretion Melatonin is the main hormone of the circadian timing system in all vertebrates including the human [] The diurnal rhythm of its secretion in the mammalian pineal gland is driven by the suprachiasmatic nucleus—the central endogenous oscillator directly connected with the retina [8–10]

Nov 20 2017The influence of pulsed electric fields and microwave pretreatments on some selected physicochemical properties of oil extracted from black cumin seed Bakhshabadi H(1) Mirzaei H(1) Ghodsvali A(2) Jafari SM(1) Ziaiifar AM(1)

A ctinidia kolomikta (M axim and R upr ) Maxim fruits are very beneficial for the health but their wide use is limited by short shelf life One way of fruit preservation is drying but A ctinidia fruits have quite firm skin which results in a long drying time Pulsed electric field (PEF ) is a promising nonthermal food stuff processing method based on a very short time (μ s to ms range