نتایج جستجو برای: pulsed electric field

تعداد نتایج: 915169  

The ever raising request for energy and resource limitations in the world, particularly Iran, have ever increasing attention to intense research in optimization, and economization of energy consumption. Since, the application of traditional methods for production of sugar especially in Iran is associated with high consumption of energy and water, using of pulsed electric field (PEF) technology ...

2017
Claudia Muratori Andrei G. Pakhomov Loree Heller Maura Casciola Elena Gianulis Sergey Grigoryev Shu Xiao O. N. Pakhomova

Nanosecond pulsed electric fields are emerging as a new modality for tissue and tumor ablation. We previously reported that cells exposed to pulsed electric fields develop hypersensitivity to subsequent pulsed electric field applications. This phenomenon, named electrosensitization, is evoked by splitting the pulsed electric field treatment in fractions (split-dose treatments) and causes in vit...

Journal: :Analytical chemistry 2002
Alex I K Lao Dieter Trau I-Ming Hsin

Electric field flow fractionation (EFFF) is a powerful separation technique based on an electrical field perpendicular to a pressure-driven flow. Previous studies of microelectric field flow fractionation (micro-EFFF) indicate that separation performance was limited due to a weak effective electric field caused by polarization layers on the electrode surfaces. In this work, we report on a micro...

Journal: :iranian journal of microbiology 0
ae torkamani department of agriculture and food systems (dafs), school of land and environment, university of melbourne, melbourne, vic 3010, australia.

background and objectives: pulsed electric field (pef) is a novel emerging technology which is believed to have the potential to substitute conventional thermal pasteurization (htst). in the current study pef was compared with htst based on microbial inactivation and quality attributes. materials and methods: juice was prepared by extracting it from semirum apples. they were chilled to 4ºc over...

Journal: :Bioelectrochemistry 2015
Djamel Eddine Chafai Andraž Mehle Amar Tilmatine Bachir Maouche Damijan Miklavčič

Electroporation of cells is successfully used in biology, biotechnology and medicine. Practical problems still arise in the electroporation of cells in suspension. For example, the determination of cell electroporation is still a demanding and time-consuming task. Electric pulses also cause contamination of the solution by the metal released from the electrodes and create local enhancements of ...

Journal: :Optics express 2011
R de Bruin H P Urbach S F Pereira

We study focused fields which, for a given total power and a given numerical aperture, have maximum electric field amplitude in some direction in the focal point and are linearly polarized along this direction. It is shown that the optimum field is identical to the image of an electric dipole with unit magnification. In particular, the field which is the image of an electric dipole whose dipole...

2017
Fei Guo Yaping Wu Zhiming Wu Congming Ke Changjie Zhou Ting Chen Heng Li Chunmiao Zhang Mingming Fu Junyong Kang

We investigate the electric-field-dependent optical properties and electronic behaviors of GaS monolayer by using the first-principles calculations. A reversal of the dipole transition from E//c to E⊥c anisotropy is found with a critical external electric field of about 5 V/nm. Decomposed projected band contributions exhibit asymmetric electronic structures in GaS interlayers under the external...

Journal: :Physical review letters 2007
Peter Palffy-Muhoray

In the theoretical section of their Letter, the authors claim the result that ‘‘the magnetic current density is minus one half the total current density’’ [1]. In this Comment, I argue that their argument is flawed and their conclusion is invalid. The authors consider an incident plane wave of angular frequency ! that propagates in the z-direction with its electric field linearly polarized alon...

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...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 1994
K Franke H Gruler

Human granulocytes exposed to pulsed electric guiding fields were investigated. The trajectories were determined from digitized pictures (phase contrast). The basic results are: (i) No directed response was induced by pulsed electric guiding fields having a zero averaged field. (ii) A directed response was induced by pulsed electric guiding fields having a non-zero averaged field. (iii) The dir...

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