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Photographic observations for ionized water droplets from an injection needle subjected to high voltage and for streamer discharge light from the same electrode is a part of a fundamental study on water treatment. The goal of this study is to establish a new plasma treatment method for the decomposition of persistent substance in water by using a pulsed power technique. Repetitive pulsed voltages...
This study presents the altered photosensitivity of several sciophilous seeds subjected to non-equilibrium plasma produced by polarity-reversed voltage pulses in ns range. It is well known that the photosensitivity of seeds can classified into two types, sciophilous (light-inhibited) and heliophilous (light-favoured). In this study, three kinds of sciophilous seeds, tomato, daikon radish and eggplant,...
The viscosity properties of an electrolyte solution, which consists of 1-methyl-3- propylimidazolium iodide (MPI-I) as an electrolyte and ethylisopropylsulfone (EiPS) as a solvent, using the shear horizontal (SH) wave device are investigated. The viscosities with several concentrations of the electrolyte in solutions are measured. The viscosity increases with increasing concentration of the electrolyte...
This paper presents an experimental study on toluene gas decomposition using repetitive surface discharges on a dielectric barrier subjected to very fast polarity-reversed pulse voltage or standard ac (sinusoidal or square) voltages. 300 ppm of toluene with dry air or with humid air is injected into a plasma reactor with a double cylindrical glass tubes. Effect of the very fast polarity reversal on...
This paper presents an experimental study on germination control for naked barley seed by using a repetitive pulsed power technique. Two kinds of tests, localized pulse electric field (PEF) treatment and dielectric barrier discharge (DBD) treatment, are carried out. In the first test, very short mono-polar pulses below 500 ns in width and below 5 kV in heights are applied to the seeds between point-plane...
Metal nanoparticles have become more and more important to electronics, photonics, biotechnology, and so on. In particular, anisotropic gold nanoparticles such as gold nanorods exhibit unique properties due to its anisotropy. We reported a method for three-dimensional assembling of anisotropic gold nanoparticles as well as gold nanospheres, by two-phase transfer. In this study, we numerically calculate...
Water tree degradation is major problem for power transmission cables. Water treeing is typical of the processes involved in the aging of XLPE cables, and it is known that it causes degradation of insulation performance. To avoid catastrophic failure, a method for localization of this water-treed section is required. We here propose a water-tree detection using polarity-reversed voltage pulses propagation...
The viscosity properties of an electrolyte solution, which consists of 1-methyl-3-propylimidazolium iodide (MPI-I) as an electrolyte and ethylisopropylsulfone (EiPS) as a solvent, using the shear horizontal (SH) wave device are investigated. The viscosities with several concentrations of the electrolyte in solutions are measured and the viscosity increases with increasing concentration of the electrolyte...
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