نتایج جستجو برای: pulse electric fields

تعداد نتایج: 455016  

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
(pages 151-162) a. m. maskooki m. n. eshtiaghi

the effects of pulsed electric field (pef) on the cell disintegration of sugar beet were studied. field strength (0.5kv/cm to 6kv/cm), pulse number (1 to 100 pulses) and capacity of capacitors (0.5 f to 32 f) were evaluated on degree of cell disintegration and consumed energy in pef treatment. the field conditions of 1 and 2 kv/cm, 8 f with 20 and 10 pulses respectively disintegrated the cel...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
a. maskooki m. n. eshtiaghi

the effect of pulse electric field on mass transfer in sugar beet cossettes with different thicknesses were investigated and compared with traditional thermal processing. two kinds of sugar beet cossettes 3±0.5 cm and 2±0.5 thicknesses with 3–5 cm long subjected to pulse electric field (3kv, 8 µf, and 20 pulse) and compared with heat treated samples (80ºc for15 minutes) as conventional thermal ...

Introduction: Irreversible electroporation (IRE) is a process in which the membrane of the cancer cells are irreversibly damaged with the use of high-intensity electric pulses, which in turn leads to cell death. The IRE is a non-thermal way to ablate the cancer cells. This process relies on the distribution of the electric field, which affects the pulse amplitude, width, and electrical conducti...

2014
Maciej A. Noras

Operation of traditional fieldmeters typically relies on mechanically actuated capacitance for DC fields measurement. This paper provides theoretical background for operation of an electric field sensor with a solid state variable capacitor. Design is supported by circuit and FEA models, illustrating the operation. Theoretical work is verified against results of sensor’s tests performed in DC, ...

2011
Ahmed Gad Shesha H. Jayaram

Electrochemical reactions, especially those involving the electrode material, are considered one of the challenges facing the commercialization of the process of food preservation using pulsed electric fields. These undesired reactions lead to the migration of electrode material components into the food under treatment affecting food quality and taste, electric field distribution, and electrode...

Journal: :Optics express 2011
Wenxiang Chen Guanglong Chen Dong Eon Kim

For the investigation of various ultrafast electron dynamics, an isolated attosecond pulse in a broad spectral range is necessary. The generation of isolated attosecond pulses demands the manipulation of the electric field of a laser. We propose a two-color field scheme for generating an isolated attosecond pulse in the water-window region. Two-color fields are generated by mixing two equally-s...

Introduction: Electrochemotherapy (ECT) is a cancer treatment modality to permeabilize cell membrane facilitating the non-permeant molecules to gain access to the cytosol of cells. Nevertheless, environmental electromagnetic fields (EMFs) may disturb the efficiency of ECT. The present study aimed to investigate the effect of EMFs 900 MHz pulse-modulated by 217 Hz extremely low-frequency fields ...

Journal: :Physical review letters 2007
I D Kaganovich E A Startsev A B Sefkow R C Davidson

The analytical studies show that the application of a small solenoidal magnetic field can drastically change the self-magnetic and self-electric fields of the beam pulse propagating in a background plasma. Theory predicts that when omega_{ce} approximately omega_{pe}beta_{b}, where omega_{ce} is the electron gyrofrequency, omega_{pe} is the electron plasma frequency, and beta_{b} is the ion-bea...

2012
Wisuwat Songnuan Phumin Kirawanich

The influences of pulsed electric fields on early physiological development in Arabidopsis thaliana were studied. Inside a 4-mm electroporation cuvette, pre-germination seeds were subjected to high-intensity, nanosecond electrical pulses generated using laboratory-assembled pulsed electric field system. The field strength was varied from 5 to 20 kV.cm and the pulse width and the pulse number we...

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