第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-1
Title:
Effect of Frequency on Ion Generation Rate of Corona Discharge Air Ionizer
Affiliation:
The Polytechnic University
Author(s):○Yasuna HIRATA, Kazuo OKANO
Abstract:
The emitter current sensor was proposed for measuring the ion generation rates ofcorona discharge air ionizers to investigate the effects of the operating condition on theneutralization performance. The sensor consists of two regions; the high voltage region
for detecting the emitter current, and the low voltage region for measuring the wave formof the emitter current by using oscilloscope. The ion generation rates were obtained fromthe difference between the total current and the displacement current. The dependenceof the frequency on the ion generation rate was measured by using the emitter current
sensor. The ion generation rate increased with increasing the operating frequency.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-2
Title:
Effect of atmospheric gas on the neutralization characteristics of corona discharge
ionizer
Affiliation:
Ibaraki University＊, The Polytechnic University＊＊
Author(s):〇Yudi KRISTANTO＊, Naoyuki SATO＊ Takashi IKEHATA＊,
Kazuo Okano＊＊
Abstract:
In the present paper we report the effect of environment gas on the performance of acorona ionizer. The atmosphere gasses used are ambient air, pure nitrogen andnitrogen-oxygen mixture gasses with the relative oxygen content of 1% - 12.5% atatmospheric pressure. The characteristics were evaluated by measuring the ionizer I- V
characteristic, the product final voltage VPF, the rippled voltage VS and theneutralization current IN. The corona ionizer was operated at DC ±1kV ~ ±9 kV for the
I-V characteristic measurement and at ±6 kV ( rectangular wave) in the frequency rangeof 5 Hz ~ 20 Hz for the other measurements. Results show that the negative current in
the pure nitrogen environment is significantly greater than the positive current and thepositive and negative currents in ambient air. The product final voltage VPF in purenitrogen also shows a significant negative value around -2 kV and by introducing someamount of oxygen into pure nitrogen, it becomes lower, around -0.3 kV similar to that inambient air.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-3
Title:Development ofheating.Part.2

low-particle-emission

coronadischarge

ionizerbyelectrodeAffiliation:
Technical R&D Center, Techno Ryowa Ltd. ＊ ， Dept. Environmental and Life
Sciences,Toyohashi University of Technology＊＊
Author(s):〇Tomokatsu SATO＊ ，Masanori SUZUKI＊ ，Akira MIZUNO＊＊
Abstract:
Corona discharge type ionizers are widely utilized in clean rooms, such as those for LCD
manufacturing processes. However, these ionizers are also known to generate particles
due to deposition of particles to tip of the electrodes and then these particles are
eventually released into air of clean room. In order to resolve this problem, we devised amethod for inhibiting the deposition of particles to tip of the electrodes by heating theelectrodes to utilize the thermophoretic force to repel fine particles towards low
temperature region. In the previous paper, we conducted an experiment on heating an
ionizer electrode to approximately 90℃. The result indicated that, compared to a
non-heated case, amount of the particle-deposit on the electrode was reduced. In thispaper, we devised a practical heating method of ionizer electrode. As a result of thisexperiment, we found that it was possible to heat the electrode to the desired
temperature.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-4
Title:
Study on discharge current and radiated electromagnetic wave
discharge of conductive polycarbonate

by electro static

Affiliation:*Suzuka National College of Technology, **YUKA DENSH I Co., Ltd.
Author(s):Takayoshi OHTSU*, Hideyuki DOYAMA* and Kouichi Sagiaka**
Abstract:
The robustness of ESD (electrostatic-discharge) of the electronics device becomes
weak year by year due to increasing of data transfer rate, and a countermeasure in thesystem level is demanded. It is very important the selection of the material for thesystem. In this study, the polycarbonate with CF (carbon fiber) ,CNF (carbon nano fiber)and CNT(carbon nano-tube) were used for comparison of discharge current andradiated electromagnetic wave. The approach speed between a sample and a probe
was controlled by a robot arm system. The discharge current of all were decreased withincreasing of the surface resistance. The discharge current of CNT was the lowest of all.
The radiated electromagnetic waves of all were decreased with increasing of the surface
resistance. The radiated electromagnetic wave by ESD of CNT was the lowest of all also.
For ESD sensitive device, the polycarbonate with CNT is superior to that with CNF or CF
from the viewpoint of the discharge current and the radiation electromagnetic wave.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-5
Title:
Humidity effect on ozone generation by low-pressure mercury lamp
Affiliation:
The University of Tokyo
Author(s):○Yusuke TOKUMITU, Ryo ONO
Abstract:

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-6
Title:On the mode transition between brush and propagating brush discharges – A
preliminary experiment
Affiliation:JNIOSH
Author(s):A. Ohsawa
Abstract:
We report preliminary experimental results on the transition between the modes of brushand propagating brush discharges occur on charged insulting films or coats on a
grounded metal. A unified transition criterion with the consideration of the thickness
and dielectric constant of coat materials is presented for the risk assessment of theignition by the discharges, in which the charge transferred by the discharges can be
expressed by a function of the initially accumulated electrostatic energy per unit area ofthe charged coats.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-7
Title:An experimental demonstration of the minimisation of offset voltage for corona ionisers
Affiliation:JNIOSH*, Kasuga Denki Inc**.
Author(s):○A. Ohsawa*, N. Nomura**
Abstract:
We present an experimental demonstration of a prospective idea obtained from 2-D
electrohydrodynamic simulations in which continuously emitting balanced positive andnegative ions from corona ionisers can yield zero offset voltage.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-8
Title:
Detection of Incendiary Electrostatic Discharges inside Powder Storage Silo by Using
Photosensor-type Electrostatic Discharge detector
Affiliation:*National Institute of Occupational Safety and Health, Japan，**Kasuga Denki INC.
Author(s):〇Kwangseok CHOI*, Tomofumi MOGAMI ** and Teruo SUZUKI**
Abstract:
To detect incendiary electrostatic discharges generated by polymer granules within ametal silo, we developed a novel and simple electrostatic discharge detector that utilizes
a photosensor. The novel detector consists of a photosensor module in a metal cylinder,an optical band-pass filter (λ：337 nm), a quartz glass, a power supply, an amplifier forthe photosensor module, and a digital oscilloscope. In this study, we conducted
experiments at a real pneumatic powder transport facility including a metal silo toevaluate the novel detector using polypropylene granules. To determine theperformance of the novel detector, we observed the electrostatic discharge within themetal silo using a conventional image-intensifier system. The results obtained from theexperiments show that the novel detector worked well in this study. The signals obtainedwith the novel detector were identical to the incendiary electrostatic discharges obtainedwith the conventional image-intensifier system. The greatest advantage of this novel
detector is that it is effective even when placed under the sunlight.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aD-9Title:
Experimental study on the relationship between the charge amount of polypropylene
granules and electrostatic discharges while silo loading
Affiliation:* JNIOSH,** Kasuga Denki INC,
Author(s):〇 Kwangseok CHOI *, Tomofumi MOGAMI **, Teruo SUZUKI **, and Mizuki
YAMAGUMA*
Abstract:
This paper is a report of the relationship between the charge amount (charge to mass
ratio) of polypropylene granules (PP; typical particle size of 2 to 3 mm, 300 kg) and theelectrostatic discharges that happened while loading of metal silo (diameter, 1.5 m;
straight body length, 3 m; capacity, 4.8 m3). The feedback control system was used inorder to control the charge amount of PP granules. The electrostatic discharges inside
the silo were also observed by using a conventional image-intensifier system. The
results obtained from the experiments show that (1) two kinds of electrostatic discharges
inside a metal silo while loading PP granules, i.e., brush discharges and incendiary bulk
surface discharges were clearly observed. (2) the number of brush discharges andincendiary bulk surface discharges increased with the increase in the charge to mass
ration of PP granules, and then almost reaching saturation. And (3) brush discharges
and incendiary bulk surface discharges began to happen at the -1.16 μC/kg and -2.33
μC/kg point, respectively in this study.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pS-1
Title:
Revolution of Science education for fostering next generation
Affiliation:
Faculty of Education, CHIBA University
Author(s):Jun NOMURA
Abstract:
In this era of globalization, one of the policies to sustain the continued development ofJapan is to preserve the high level of our strength in science and technology. On theother hand, we are also faced with the problem of children losing interest in science. We
have to reconsider how to teach them.For this reason, we in the Faculty of Education,
which has a large responsibility for education in Japan, have established a system for
nurturing a new generation of talented scientists. In this connection, last year wedeveloped “Lab on the desk”, a learning support program for children talented in science,
led by university students. Furthermore, last year we implemented the TWINCLE
program, which is aimed at training teachers who have both an understanding of
cutting-edge science and a global point of view.Through these programs we aim tonurture highly talented scientists.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-1
Title:
Electrostatic-charge behavior of liquid in CFRP-fuel tank
Affiliation:*The University of Tokyo，**Fuji Heavy Industries Ltd.

Author(s):Akiko KUMADA*, Junki GOTO*, Hiroki NAKAMATA*, Kunihiko HIDAKA*,Hiroyuki
TSUBATA**, Ai KAWASHIMA**, Takayuki NISHI**
Abstract:
In recent years, carbon-fiber-reinforced plastic (CFRP) is widely used in various fields
such as aircraft structures since it has high mechanical strength and lightweightcharacteristics. Although the aircraft fuel tank would be made from CFRP, the insulating
coat on inner walls of the tank is still necessary to prevent electrolytic corrosions.
However, the static electricity problem resides because of the special conductive
characteristics of CFRP. To perform a rational design of a CFRP fuel tank, it is necessary
to establish a method to check how high voltage is generated in the aircraft fuel tank. In
this research, we grasp behavior of electric charge in mock liquid fuel in tanks bymeasuring the surface voltage on inner wall. In addition, the movement of charge isanalyzed by the method of finite differences and the simulated results are compared withthe measured results.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-2
Title:
Influence of Relative humidity on DC negative Corona discharge from a Fine Water
DropletAffiliation:
Yamagata University
Author(s):○Satoshi Sugimoto, Yoshio Higashiyama
Abstract:
Current waveform of corona discharge occurring at a cone tip of a water droplet consistsof intermittent pulse groups with a regular interval due to formation and disruption of a
Taylor cone. To investigate the influence of relative humidity on corona discharge from awater droplet, negative corona discharge was measured under the condition of relative
humidity varing from 24% to 99%. Peak value and charge quantity of corona pulse
trains were decreased with humidity. When relative humidity low, pulse height of corona
pulse trains repeated at both the higher and lower level alternatively. This would result
from temporal increase humidity near electrode due to the release of fine water jets.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-3
Title:
Multi-doped Nanocomposite Polymeric Insulating Material for Control of Treeing
Deterioration
Affiliation:
Faculty of Education Chiba University
Author(s):Yoshiaki Yamano
Abstract:
The nano-composite was prepared by mixed addition of azobenzoic compound andAl2O3 nano-particle into LDPE for the purpose of ensuring the electrical treeing
resistance
in
a
long
term
span.
The
compoundusedwas4'-hydroxyazobenzene-2-carboxylic acid (hc_Ab). Experimental results showed that tree
initiation voltage for the mixed addition was increased to about 1.8 times higher than thatfor the base polymer (LDPE); An incubation time (a period from voltage application totree gener-ation) was almost 50 times longer than that for the base polymer. It was
experimentally confirmed that absorption of electron’s kinetic energy can be obtained byexcitation of hc_Ab and cohesion of nano-particles can be controlled in the bulk of thenano-composite using hc_Ab.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-4
Title:
Resonant Vibrating Frequency of a Fine Water Droplet under AC Field
Affiliation:
Graduate School of Science and Engineering, Yamagata University
Author(s):○Yoshio HIGASHIYAMA and Hajime WATANABE
Abstract:
Corona discharge from a fine water droplet always involves deformation of the droplet
shape or Taylor-cone formation, emission of fine water jets or disruption of droplet.
Therefore, corona discharge from a water droplet always manifests complicated aspects.
In addition, disruption of Taylor cone simultaneously affects not only discharge current
but also motion of water droplet. To confirm corona discharge phenomena from a water
droplet, resonant vibrating frequency of a water droplet using with a volume of a few nLor a diameter with a few hundreds m was measured under ac field. The water droplet
was formed at a web string with a diameter of 20 m by spraying deionized water
toward it. Since the droplet has inherent resonant vibrating frequency defined by thesize or volume, the size of the droplet was monitored by a microscope and resonant
vibration or deformation was observed. The relationship between resonant vibrating
frequency and the droplet size was expressed with inversely proportional –0.4 power ofthe volume.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-5
Title:
Electric Field Simulation of Water Tree Tip Using the Equivalent Circuit Model
Affiliation:＊Graduate School of Engineering and Resource Science, Akita University，＊＊Akita
University
Author(s):Kyohei Takahashi＊, Masafumi Suzuki＊，Noboru Yoshimura＊＊
Abstract:
In this study, we calculated the electric field of water tree tip under high-frequency /low-frequency superposed voltages. It was found that the electric field of inside of watertree tip had been affected by high frequency of applied voltage. Whereas, the electricfield of outside of water tree tip was affected by applied voltage waveform. Furthermore,
it was revealed that the number of zero-crossings of electric field of outside of water tree
tip was in the same number of that of applied voltage.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-1
Title:
Measurement of O and OH density distribution produced by an atmospheric-pressure
helium plasma jet nearby rat skinAffiliation:
The University of Tokyo
Author(s):○Seiya YONEMORI, Ryo ONO
Abstract:
Atmospheric-pressure helium plasma jet is getting much attention because it enables
plasma biomedical application such as sterilization and cancer treatment. In biomedical
plasma applications, OH radical and O atom are deemed as a major factor in cancer
treatment. In this study, O and OH density distribution and its temporal behavior nearby
rat skin were measured to demonstrate actual biomedical application. Plasma discharge
was under 6 kV, 10 kHz with 1.5 l/min of helium gas ow. Maximum OH density wasapproximately
1.5 × 1013 [cm 3] and maximum O density was approximately 5.0 × 1014 [cm 3] in thecenter of the plasma jet. We also measured time-evolution of OH and O density,
resulting that OH and O density was almost constant between discharge pulses. And
density distribution of both species varied depending on helium ow rate and water
concentration on the surface. Those results suggest the production mechanisms andprovision mechanisms of OH radical and O atom by an atmospheric-pressure helium
plasma jet.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-2
Title:
Ozone removal using electric discharge
Affiliation:
Midori Anzen Co.,Ltd.
Author(s):Tomoyuki Saito and Naoki Sugita
Abstract:
In the atmosphere, ozone is generated by corona discharge and non-thermal plasma
applied to charging of particles, removal of VOCs, sterilization and others. It isnecessary to remove the excess ozone after using for these processing because theodor threshold and TLV of ozone are very low. In this study, we have discovered the newdischarge method which generates no ozone and removes ozone gradually withglow-like luminescence. It is presumed that the ozone removal mechanism is thereaction between ozone and nitric oxide (NO) which is generated by ozone removal
discharge. It confirmed experimentally and theoretically that NO generated by thedischarge reacts to ozone with the predicted reaction time. NO is safer than ozone andthe applications of NO are expected to various fields in recent years.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-3
Title:
Effect of electrode gap distance for OH radical production in surface area
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST)
Author(s):○Yoshiyuki Teramoto, Hyun-Ha Kim, Atsushi Ogata and Nobuaki Negishi
Abstract:
This paper focused on the effect of electrode gap distance (d) for OH radical productionin the surface area. OH was measured in pulsed positive dielectric barrier discharge(DBD) under atmospheric pressure humid N2 with several gap distances using
laser-induced fluorescence (LIF) technique. DBD occurs in a point-to-plane gap (gapdistance: d = 0, 3.5, 5.5, and 8.5 mm) with a 1 mm-thick glass plate placed on the planeelectrode. The ratio of OH production in the surface area (OHS) to OH total production(OHT) by a discharge pulse decreased with increasing gap distance, but kept constantwhen applied voltage rose. The energy efficiency of OHT had a peak within 0 < d < 3.5
mm. On the other hand, that of OHS monotonically decreased with increasing d. The OH
local density in the streamer channel was evaluated from decay rate of OH. The results
indicated that OH local density in the surface area was almost the same as that near theanode tip. OH local density was scarcely affected by applied voltage and gap distance.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-4
Title:
Control of Irradiation Area of the Atmospheric Sheet-type Plasma Jet
Affiliation:
Faculty of Engineering, Nippon Bunri University
Author(s):○Hiroshi MIZOGUCHI, Kota KAWANO, Yuto YANO, Keisuke YAMASHITA, Toshiyuki
KAWASAKI and Miho SAKAI
Abstract:
An atmospheric pressure non-thermal plasma jet has been actively studied anddeveloped for the sterilization and biomedical applications.
In this study, thesterilization has been investigated using the sheet-type plasma jet generator. The
control method of its irradiation area without changing the generator structure wasinvestigated in order to apply in both the wide range and spot sterilization. The plasma
jet generator used in this study consists of two glass plates, the H.V. electrode madeonto one glass plate and the grounded electrode. The mixture gas of He and N2 was
supplied into the generator at a flow rate of 2 L/min. The sterilization of yeast was
carried out. The irradiation area was evaluated by the clear zone size after the plasma
irradiation and static culture in this paper. As a result, the width of plasma jet was
decreased with increasing the N2 concentration in He. Accordingly, the width of theclear zone was also decreased. It can be controlled by the applied voltage and N2
concentration in He without changing the generator structure.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-5
Title:
Demonstration of Electrostatic pesticide spraying by Applying Triangular-W ave Voltage
Affiliation:＊Graduate School of Engineering, Tottori University，＊＊Arimitsu Industr y Co., Ltd.
Author(s):○ Hidetoshi TAKAYA＊, Tatsuya IZUTSU＊, Ryo NISHIMURA＊, Takashi MASUOKA＊＊,Toshihiro KIMURA＊＊, Shinji YATSUZUKA＊＊, Shinobu ANAGUCHI＊＊
Abstract:
In induction-charging electrostatic pesticide spraying (EPS), deposition p roperties ofpesticide were improved by applying a triangular-wave voltage o n an induction
electrode rather than DC voltage. In this paper, we report on the results of pest-control
experiments using potted pear trees and investi gations of deposition properties in agreenhouse for pear-cultivation using a speed sprayer installing induction-charging
electrodes near spraying nozzl es. In the pest-control experiments, we sprayed apesticide that controls ru st to pear trees by using an induction-charging electrostatic
sprayer applyi ng DC and triangular voltages. It was shown that the numbers of rustlesions on the pear leaves can be decreased by 25% by applying triangular-wave volt
age in comparison with the DC voltage. We also sprayed water by using a spee dsprayer installing induction-charging electrodes near spraying nozzles in a greenhouse
where pears were being cultivated on a trellis. Pieces of wate r-sensitive paper were
fixed on the pear trellis to investigate the water-de position properties. In thisinvestigation, a clear difference in the deposi tion properties between triangular-voltage
and DC voltage cases is not found . However, it is shown that adopting
induction-charging system is effective for pest control using speed sprayers.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-6
Title:
Charge elimination model and evaluation of a closed-placed ionizer
Affiliation:
Yamagata University
Author(s):〇Kazutoshi FURUTCHI and Toshiyuki SUGIMOTO
Abstract:
DC ionizer placed closed to the charged target are proposed to shorten the charge
elimination time. A charge elimination model that introduces a simplified charge
elimination current is proposed to evaluate ionizer performance. The charge elimination
model was verified by the experimental results. The closer the ionizer was located to thetarget, the higher the charge elimination current became.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-7
Title:A Study on Fundamental Characteristics of Electro-Osmotic Pump
Affiliation:
Yamagata Univ
Author(s):○Ryota ENDO

Kyoko YATSUZUKA

Abstract:
An electroosmotic pump has some advantages over mechanical pumps in a simple
structure, low cost, abrasion-free, light weight, easy-controlling and no-pulse-operation.
Thus, there are several possibilities of the micro-pumps for a fuel-cell, bio-technology orthermo system in space. In this study, an electro-osmotic pump with a polymer filter in apipette tip was examined and the fundamental pump characteristics are reported. The
driving fluid is the water of 3.3 μS/cm conductivity. The water column length grows withthe applied voltage. The thinner filter is used, the higher on the direction of the applied
voltage. If the water rises toward the same direction to that the water injected, the higher
electroosmotic effect I obtained. It suggests that there is some electrification of water,when it inject into the pump system. There is also a very slow relaxation characteristics
in rising the water column. More precise experiments will be necessary to clarify thisdynamic behavior.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aA-8
Title:
Electrical Circuit of Frictional Electrification
Affiliation:
Tokyo University of Agriculture and Technology
Author(s):Norio Murasaki
Abstract:
Charge generations of frictional electrification is controlled by the electronics states andtheir surface contact resistance of test pieces. The measuring systems of them arecomplicated in structures. On the circuit of frictional electrification, charge generation
are controlled by the e•ｍ•ｆ and contact surface resistance. The measurement
systems of them are simple. Then, in electrical circuit of frictional electrification,
electrification series are changed to stated mathematically charge quantity series andcontact resistance series. And, ｆrictional electrification in many types can be valuatedmathematically as the charge state of figure of e•ｍ•ｆ and resistance. Frictional
electrification belong to electrical circuit.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-6
Title:
Improvement of piezoelectric properties of chiral polymer by using additives
Affiliation:
Graduate School of Engineering, Kansai University
Author(s):Yoshiro TAJITSU
Abstract:
Improvement of piezoelectric properties of chiral polymer by using additives, Graduate
School of Engineering, Kansai University, Osaka 564-8680, Japan, Yoshiro TAJITSU, By
using additives to change the higher-order structure of a poly(l-lactide) (PLLA)PLLA film,
an improvement in its piezoelectricity was realized. The additive used was a triblock
copolymer, which is a pure acrylic symmetric block copolymer consisting of a center
block of poly(butyl acrylate) (PBA), corresponding to its soft part, and two side blocks ofpoly(methyl methacrylate) (PMMA), corresponding to its hard part. The piezoelectric
constant of the PLLA film after adding the triblock copolymer was over two times higher
than that of the PLLA film without adding it (reference PLLA film).

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-7
Title:The Effect of Discharge Polarity on Coaxial Cylinder Dielectric Barrier Discharge inhumid nitrogen atmosphere
Affiliation:
Mitsubishi Electric Corp.
Author(s):Yusuke Nakagawa
Abstract:
In order to solve air pollution problem, atmospheric plasma application is desirable. In
this study, we investigated the effect of discharge polarity on coaxial cylinder pulsed
barrier discharge in humid N2.
Laser-induced fluorescence measurement indicatedthat OH production is about 30 ppm at 3 μs after discharge when +28 kV is applied. As
for the negative discharge, OH measurement revealed that OH production is almost thesame but OH density is about one fourth compared to those in positive discharge, due tothe difference in streamer radius. Humidity effect on TCE decomposition efficiency in N2
pulsed barrier discharge is also investigated using the same reactor. The increasing
humidity resulted in enhancement of TCE decomposition efficiency, indicating that OH
plays important role in TCE decomposition. Besides, TCE decomposition efficiency innegative discharge is larger than in positive one. It can be explained considering the OH
density dependence on discharge polarity.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-8
Title:Development of Ion Adsorption Capability Electrodes for Electrokinetic Phenomenon
Affiliation:＊Graduate School of Engineering and Resource Science, Akita University
Author(s):○Koutarou Takahashi＊, Mahmudul Kabil＊, Masafumi Suzuki＊
Abstract:
With the development of the industries, the pollution of the soil by heavy metal fromindustrial effluents has become serious problems to the environment. Therefore, manytechniques were proposed for the process of the contaminated soil. Recently,
electrokinetic phenomenon is being noticed. In this method, ionized heavy metal whichis included for contaminated soil moves to cathode side with the water by theelectroendosmosis and discharged from soil. However, this method may link to asecondary pollution through the drainage. Electrodes made of ion adsorption materials
may help to solve this problem. We have chosen zeolite and activated carbon as ion
adsorption materials and prepared electrode. These electrodes are used as cathode
thus can adsorb heavy metal ions from the drainage. In this research, we have prepared
two types of electrodes with different materials (i.e. activated carbon, zeolite) andmeasured their properties . The ion adsorption capability of these electrodes were
measured with standard solution of copper. The recovery of copper was 12 % foractivated carbon electrode, and 26 % for zeolite electrode including carbon powders. So,
these electrodes have good possibility to remove heavy metals from the contaminatedsoil.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-9Title:A Mechanism of Triboelectric Charging of Powdered Polymers in Vacuum at 77 K
Affiliation:＊Institute of Environmental Sciences, University of Shizuoka, ＊＊Department of Agriculture, Meijo University, ＊＊＊Graduate School of Agriculture andLife Sciences, The University of Tokyo
Author(s):〇Masato SAKAGUCHI＊, Masakazu MAKINO＊、 Takeshi OHURA＊＊ and Tadahisa
IWATA＊＊＊
Abstract:
The frictional contact between two polymeric materials should produce scissions ofchemical bond comprising the polymer main chain.
Accordingly, we set the mechanical fracture of polymers in vacuum at 77 K by a ball
milling. Under the condition, the mechano-radicals, mechano- anions, andmechano-cations were produced by homogeneous and heterogeneous scissions of the
carbon-carbon bond comprising polymer main chain. They were trapped on the fresh
surface of powdered polymers produced by the fracture, and did not decay out at 77K invacuum. We calculated the HOMO and LUMO energy levels of mechano-radicals,mechano- anions and mechano-cations for PP, PE, PVF, PVDF, PVC, BC and PTFE invacuum based on their model structures using Gaussian R 09W (ver. 7.0) and
GaussView ver.5.0. Each sign of charge due to friction between polymers was estimatedby counting the electron transfer reactions among mechano-radicals, mechano-anions,and mechano-cations that the reactions controlled by their HOMO and LOMO energy
levels. According to our proposed mechanism for the triboelectric charging of polymers
in vacuum at 77 K, polymers can be ordered as follows: Positive, PP-PE-PVC-PVF=
PVDF-BC-PTFE, Negative. This result strongly suggests that the relative sign of thecharges of polymers in vacuum at 77 K can be estimated by their chemical structure.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-10
Title:
Negative Pulsed Breakdown Phenomena in Supercritical Carbon Dioxide
Affiliation:
Graduate School of Science and Technology, Kumamoto University,Japan＊ Instituteof Pulsed Power Science, Kumamoto University,Japan＊＊ Multidiscipline laboratoryof Kyusyu Electric Power Co., Inc., Japan＊＊＊

Author(s):○Tomohiro Furusato＊，Hiroyuki Tanoue＊，Sunao Katsuki＊＊,
Masanori Hara＊＊＊，Hidenori Akiyama＊
Abstract:
Discharge phenomena in supercritical fluids (SCFs) have begun to catch the attention ofmany research fields due to their attractive characteristics. However, specific studies ofdischarge mechanism in SCFs remain scarce. So far, the authors studied initiation
mechanism of nanosecond pulsed discharge in supercritical carbon dioxide at gap
distance of few mm under positive and negative polarity. Although a negative pulsed
voltage with a peak voltage of 50 kV and half-width of 410 ns was applied to the 1 mm
gap, streamer growth was limited to within a quite narrow region. In this study, thenegative pulsed breakdown phenomena in supercritical carbon dioxide with a 100 um
needle gap distance were reported. The pre- and post- breakdown phenomena insupercritical phase were visualized by means of Shadowgraph method.
The tip
curvature of the needle was set at r = 8 and 490 um. The appearance of streamer at
pre-breakdown varied greatly by changing the needle tip curvature, although the
breakdown voltage, approximately 60 kV, remained somewhat constant. A large bushlike streamer and several individual small bush like streamers grew from the cathodeat r = 8 and 490 um.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pA-11
Title:
Dielectric Breakdown and Mechanical Properties of Polylactic Acid Spherulites ofDifferent Sizes
Affiliation:
Hachinohe Institute of Technology
Author(s):○Naru MATSUGASAKI、Katsuyoshi SHINYAMA、Shigetaka FUJITA
Abstract:
The degree of crystallinity of polylactic acid (PLA) was increased by heat treatment, andthe dielectric breakdown strength and mechanical properties of the obtained PLA ofdifferent spherulite sizes were studied. PLA heat-treated at a temperature of 120℃ or
higher showed rapid increases in spherulite size. At both measurement temperatures of
25℃ and 80℃, the dielectric breakdown strength (EB) showed rapid falls when the heat
treatment temperature was 120℃ or higher. At a measurement temperature of 25℃, thetensile strength at break and breaking elongation showed rapid falls when the heat
treatment temperature was 120℃ or higher.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-1
Title:
Decomposition of CF4 in DC Plasma within Bubble and Trapping Fluorine
Affiliation:＊ Department of Electrical and Electronic Engineering, Tokyo Institute of Technology＊＊ Taiyo Nippon Sanso Corporation
Author(s):○Yuriko MATSUYA＊, Ryota SUGANUMA＊, Koichi YASUOKA＊ and Katsumasa
SUZUKI＊＊
Abstract:
Perfluorocarbons (PFCs) such as tetrafluoromethane (CF4) are widely used insemiconductor manufacturing processes; however, there is urgent need to reduce the
PFCs emissions due to their large global warming potential. DC plasma within gas
bubbles, which were generated in tap water, was used for PFCs decomposition. The
detached fluorine atoms from CF4 were captured in the water and their concentration
was measured and used for calculating the CF4 removal rate. The CF4 removal rateincreased with decreasing the gas flow rate and increasing the current. The maximum
CF4 removal rate of 96.7% was obtained at an applied current of 13 mA.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-2
Title:
Removal of Ethylene and By-products Using Packed Bed Dielectric Barrier Discharge
with Ag Supported Catalyst
Affiliation:
Faculty of Engineering, Iwate University
Author(s):Tomoya Kawamura
Abstract:
Ethylene was decomposed using packed-bed type dielectric barrier discharge (PBDBD)
plasma reactor to keep freshness of fruits. The PBDBD plasma was generated by apulse switching power supply which consisted of MOS-FET switching devices,
capacitors and pulse transformers. Ag supported catalyst having high catalyst activity
and having the performance which oxidizes reduction and carbon monoxide of ozone
near room temperature has been reported. The experimental results showed that theethylene removal was increased by employing Ag supported catalyst pellets. The ozone
generation and carbon monoxide generation was reduced by employing Ag supported
catalyst pellets. The PBDBD with Ag supported catalyst was reduced ethylene, ozone
and carbon monoxide. Carbon monoxide was confirmed to oxidize to carbon dioxidewith Ag supported catalyst by Fourier Transform Infrared Spectroscopy spectra.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-3
Title:
Electrostatic Precipitator Utilizing Gradient-force
Affiliation:＊Panasonic Environmental Systems & Engineering Co., Ltd, ＊＊Panasonic Ecology
Systems Co., Ltd, ＊＊＊Toyohashi University of Technology
Author(s):○Atsushi KATATANI＊, Hiroshi HOSONO＊＊, Hikaru MURATA＊＊, Hiroshi YAHATA＊＊, and Akira MIZUNO＊＊＊MURATA＊＊, Hiroshi YAHATA＊＊, and Akira MIZUNO＊＊＊

Abstract:
ESPs (electrostatic precipitators) charge particles which are passing throughcorona-discharge space and collect them by Coulomb’s force. The purpose of this study
is to charge particles without using corona-discharge and collect them．
i.e. Due to Gradient force, the particles which enter the non-uniform electric field attach
onto the parts of electrodes whose electric field is stronger. This study clarifies that theattached particles possess electrical-charge after re-entrainment. This means thatparticles can be collected by Coulom’s force, utilizing at first “temporary collection by
Gradient force”, and then, “re-entrainment” even under the condition withoutcorona-discharge current. The possibility of drastic reduction of the power consumption
in ESPs has been found.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-4
Title:
Enhancement of collection efficiency for diesel particulate matter using collection platewith electrostatic flocking in an Electrostatic precipitators
Affiliation:
Department of Environmental and Life Sciences, Toyohashi University of Technology＊
Author(s):○Yuri Kawara, Hirofumi Kurita, Kazunori Takashima and Akira Mizuno
Abstract:
Diesel particulate matter (PM) exhausted from diesel engine causes environmental
pollution. Many methods have been applied for removal of PM. Electrostatic
precipitators (ESPs) can collect nanosized particles at low pressure drop. However, aproblem with ESP is dust re-entrainment. The agglomerated particles repeat bouncing
and are emitted from ESP. In this study, electrostatic flocking on a collecting electrode
was applied to suppress the re-entrainmant. The electrostatic flocking slightly improved
total collection efficiency. Especially, particles approximately 50 nm in diameter werecollected more effectively than normal ESP while smaller particles at around 10 nm wasbetter collected by normal ESP.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-5
Title:
Influence of Solution Flow Rate on Degradation of LAS in Air-Liquid Interface Discharge
Affiliation:
Department of Electrical and Electronic Engineering, Oita University
Author(s):○ Tomokazu OKAWA, Takaaki AJIMURA, Shuichi AKAMINE, Ryuta ICHIKI, Seiji
KANAZAWA
Abstract:
The degradation of linear alkylbenzenesulfonate sodium (LAS) was performed in
air-liquid interface discharge using a cylindrical reactor. The dielectric barrier discharge
was generated between the threaded rod electrode and running water film on the wall of
the reactor. The influence of the solution flow rate on the degradation of LAS wasinvestigated. LAS concentration was measured by high performance liquid
chromatography (HPLC) with fluorescence detection. As a result, a difference of thedegradation rate was observed in an early treatment stage. And then, the degradation
rate was gradually increased up to 100 % as the treatment time elapsed.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-6
Title:
Decompositon of Mixed Solution of Dichloromethane and Sodium Formate by Discharge
Inside Bubble in Water
Affiliation:＊Faculty of Engineering, Iwate University, ＊＊Shishido Electrostatic, LTD., ＊＊＊Faculty of Agriculture, Iwate University
Author(s):〇Keita WADA＊, Shuta KAWANO＊, Katsuyuki TAKAHASHI＊＊, Koichi TAKAKI＊
and Naoya SATTA＊＊＊
Abstract:
Water purification by discharge inside bubble in water containing two organic
compounds has been investigated. Dichloromethane (DCM) and sodium formate were
employed as specimens to evaluate decomposition efficiency. Argon or oxygen gases
were injected into the water near the high-voltage wire electrode to generate plasma to
identify the dominant reactions of the decomposition of the organic compounds solutions.
The DCM was decomposed successfully by injecting argon gas. In contrast, sodium
formate was decomposed by injecting oxygen gas. When each gas was injected, in theamount of decomposition of DCM, there was little difference between solution of DCM
alone and the solution mixed with sodium formate. On the other hand, thedecomposition efficiency sodium formate decreased in the mixed solution in comparison
with that in the sodium formate solution. These results indicate that the DCM addition
into the sodium formate solution did not affect decomposition efficiency of sodiu m
forma te under the experimental condition.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10aB-7
Title:NOx Removal for Flue Gas in Glass Furnace Using a Plasma and Chemical Hybrid
Process - Laboratory experiments with semi-dry model system -Affiliation:*Department of Mechanical Engineering, Osaka Prefecture University, **Nihon
Yamamura Glass Co.,Ltd.
Author(s):Tomoyuki KUROKI* ， ○ Hashira YAMAMOTO** ， Hidekatsu
TAKADA*，Yuusuke YAMATO* and Masaaki OKUBO*

FUJISHIMA* ， Daichi

Abstract:
In order to develop a new NOx and SOx simultaneous removal technology for flue gas inglass furnaces, a plasma and chemical hybrid process is employed and laboratory-scale
experiments are carried as a model study. It is clarified that it is necessary to cool theexhaust gas temperature less than 100 ℃ in order to obtain a high efficiency in theoxidation of NO to NO2 with ozone. The effects of water spray, the ozone injection
amount, and the reducing agent solution (Na2SO3) concentration for the simulated hightemperature exhaust gas are investigated. As a result, de-NOx performance ismaintained stable during 120 min experiment, and NO outlet concentration is reduced to
11 ppm from 100 ppm, with total NOx outlet concentration of 39 ppm. In the range oftreated exhaust gas temperature, stable performance for NOx removal by theplasma-chemical reactions is obtained. It is confirmed that the application of theplasma-chemical hybrid process to existing glass furnace with semi-dry-type de-SOx
equipment is very effective.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pB-1
Title:
Investigation of Organic Compound Decomposition and Microbial Inactivation by a
Cylinder Style Pulsed Discharge System in High Conductivity Solution
Affiliation:
Graduated School of Engineering, Gunma University
Author(s):Takanori TANINO, Yukihiro TAMURA and ◯Takayuki OHSHIMA
Abstract:
A cylinder style discharge system was applied for organic compound decomposition inhigh conductivity solution. Effect of the submerging electrode and treatment water
conductivity on the degradation of the organic compound by pulsed discharge plasma
was investigated by using indigocarmine and oxalic acid. Submerging electrodesheathed with gas flow in the treatment water facilitated decomposition of these organic
compounds. It was demonstrated that decomposition ratios of organic compound in thehigh conductivity solutions, that were equivalent to saline (18 mS/cm) and seawater (51mS/cm) respectively, were higher than that in the deionized water. And the reachable
decomposition ratio was also increased in the adjusted high conductivity solutions.
Moreover, application of this system for microbial inactivation was investigated. Similar
to the results in the organic compound decomposition, efficient inactivation was also
detected in high conductivity solution.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pB-2
Title:
Lean NOx Purification using Catalytic Reaction Assisted by Plasma
Affiliation:
Nissan Motors*, Waseda University**
Author(s):◯ Masato Nagata*,**, Yasunari Hanaki*, Katsuo Suga*, Atsushi Ikeda**, Yasushi
Sekine**Abstract:
Catalytic reaction assisted by plasma is proposed as a novel reaction system for low
temperature NOx removal. NOx decomposition reaction was promoted by theplasma-catalyst system even at low temperature. The depression of performance bygaseous oxygen was a large issue in the plasma-catalyst combined system in diesel
exhaust condition. Pt and SiO2 showed superior performance as a catalyst material in
the plasma.
Electrical property of the catalyst material was investigated, and we found a correlation
between maximum peak currents and catalytic activity.
Further investigations using diesel exhaust gas will enable an effective NOx removal
system even at low temperature.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pB-3
Title:
Diesel Exhaust Treatment by Multistage Honeycomb Discharge Reactor
Affiliation:
Department of Environmental and Life Sciences, Toyohashi University of Technology＊
Author(s):○Yuichi HINATA, Tomoya SUZUKI, Hideaki HAYASHI, Hirofumi KURITA, Kazunori
TAKASHIMA and Akira MIZUNO
Abstract:
A selective catalytic reduction using urea as reducing agent (Urea-SCR), has been
investigated and has been a well-established technique for DeNOx of stationary NOX
emission sources. However, SCR catalysts do not work at lower temperature region lessthan ca.180℃, and this is a problem when SCR is to be applied for vehicle emission
control. Atmospheric pressure non-thermal discharge plasma can be usedcomplementally to assist catalytic activity at low temperatures. We have developed amethod to generate homogeneous discharge inside a honeycomb catalyst. In this paper,
the SCR catalyst was hybridized with the discharge in honeycomb to improve thecatalytic activity at low temperatures. As a result, deNOX efficiency for the simulated
diesel exhaust could be improved from ca.20% to 73% at 140℃.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pB-4
Title:
Spectrometry of plasma-assisted combustion by reforming fuelAffiliation:
Graduate school of Frontier Sciences, The University of Tokyo
Author(s):Soichi Kobayashi, Ryo Ono, Yoshiyuki Teramoto
Abstract:
This paper focused on the effect of plasma assist for flame temperature and OH radical
density in the flame. The dielectric barrier discharge (DBD) was used for propane
reforming. The flame temperature and OH radical with and without plasma assist were
measured using emission spectroscopy and laser-induced fluorescence (LIF). The OH
density in under part of flame was increased up to approximately 2 times by the plasma
assist. However, such increase could not be observed in upper and middle part. The
results of flame temperature measurement showed that the temperature in under part offlame rose by 270 K with plasma-assist, and LIF method was suitable for thetemperature measurement in plasma-assisted flame.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pB-5
Title:
Removal of cesium ion in water using combination of zeolite and AC electric field
application
Affiliation:
Dept. Environmental and Life Sciences,Toyohashi University of Technology
Author(s):Yuki TAINO, Takuma SUGANO Hirofumi KURITA, Hachiro YASUDA,

Kazunori

TAKASHIMA, and Akira MIZUNO

Abstract:
137Cs is one of the most dangerous radioactive materials due to its long half-life periodof approximately 30 years. Efficient and high throughput treatment (removal) of thecesium ions in water is therefore required. We tried to remove cesium ions rapidly byapplying pulsed high voltage to zeolite. Since cesium ions are positively charged, they
are driven by the electric field. In order to restrict overcurrent, pulsed high voltage wasapplied to the reactor packed with the zeolite pellets. The result indicated that theremoval efficiency of Cs ions was almost twice higher compared with that without
voltage. It should also be noted that total amount of absorbed Cs ions with the voltage
application can also be increased. These results suggest that this method is effective forremoval condense Cs ions in water.

第 37 回静電気学会全国大会アブストラクト集
Program number:
10pB-6
Title:
Catalytic Property of Platinum Nanoparticle Films Using A Few
Tens keV Electron Beam Induced Reduction Method
Affiliation:＊Japan Atomic Energy Agency ＊＊ Saitama Institute of Technology
Author(s):〇 Teruyuki HAKODA ＊ , Shunya YAMAMOTO ＊ , Iwao SHIMOYAMA ＊ ,Hirofumi
ARITANI＊＊, and Masahito YOSHIKAWA＊

Abstract:
We previously observed that platinum nanoparticles films was produced on the surface
of a solution containing 1 mmol/L PtCl42- ions and 0.5-20v% ethanol by irradiating with a
few tens keV electron beams (EB).In the present study, the platinum films were
deposited to tungsten trioxide (WO3) films, ch show hydrogen gasochromic property, toexamine the catalytic property of the platinum films. The transmittance of 700-nm lights
through the repared (Pt/WO3) films decreased in exposing to 1v% hydrogen/nitrogengas. This decrease suggests the production of HxWO3 films through the reaction of
WO3 films with hydrogen atoms dissociated over Pt nanoparticles. The Pt nanoparticle
films prepared using a few tens keV EB induced reduction method were observed tohave catalytic activity.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-1
Title:
Evaluation of Potential of p-Nitrophenol Degradation in Over-Wet Soil by Pulsed Corona
Discharge Plasma
Affiliation:*Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian,
116024, China **East China Sea Fisheries Research Institute, Chinese Academy ofFisheries Sciences, Shanghai, 200090, China
Author(s):〇Na LU*, Kefeng SHANG*, Cuihua WANG**, Xue ZHANG*, Jie LI*, Yan WU*
Abstract:
An experimental investigation of p-Nitrophenol (PNP) degradation was conducted with aview toward evaluating the potential of remediating over-wet soil by pulsed corona
discharge plasma. Experimental results showed that PNP could be smoothly removed
from over-wet soil. PNP degradation efficiencies were found to be influenced by different
plasmas, which were 88.5% and 65% under oxygen and air atmospheres after 30 min ofdischarge treatment, respectively. Maximum PNP degradation efficiency as well as
kinetic constant was obtained at air flow rate of 0.8 L min-1. Great COD removal was
obtained and the mineralization was confirmed by TOC analysis. This study is expected
to provide reference for the application of pulsed corona discharge plasma in removing
organic pollutants from over-wet soil.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-2
Title:
The characteristics of shock-wave generated by discharge in liquid
Affiliation:
Environmental Science and Engineering College, Dalian Maritime University, Dalian
116026, China
Author(s):B. Sun*，Z. Gao, X. Zhu，B. Wang and Z. Yan
Abstract:
In this paper, the characteristic of shock-wave generated by pulse discharge in liquid
were studied with rod-rod electrodes. The characteristics of shock wave with change ofthe pulse voltage and electrode gap were studied in the discharge process. The results
show that the peak pressure of shock wave increased with the increasing of pulsed
voltage. The peak pressure of shock wave increased first and then decreased with theincreasing of electrode gap when the discharge voltage is 22kV. The pressure of theshock wave (Pr) decays exponentially with the distance (r) from the discharging center.
Under this experimental condition, the shock wave intensity is calculated by averaging
values of the experiment, and the experience formula is given for Pr = 2.56E·e-0.4831r.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-3
Title:
Plasma–water interaction for removal of persistent substances in water
Affiliation:
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology
Author(s):K. Yasuoka, Y. Matsuya, R. Suganuma, and N. Takeuchi
Abstract:
Discharge plasmas generated at gas–liquid interfaces are extensively studied for water
purification. There are two methods for water purification: (a) using oxygen radicals
generated by the plasma at the interface and (b) the direct decomposition of substancesby the plasma. The key parameters in the use of radicals are summarized in the case ofacetic acid decomposition; that is, current density, solution conductivity, and water vapor
concentration. In perfluorooctanesulfonic acid (PFOS) decomposition, theabovementioned parameters did not affect the decomposition process. The depositedenergy in the discharge, the accumulation of PFOS at the interface, and the polarity of
the applied voltage were much more important.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-4
Title:
Investigation on Degradation of Coking Wastewater by Gas Phase
Surface Discharge Plasma Using Liquid Electrode Combined with Catalysts
Affiliation:
Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian,
China
Author(s):○ Jie LI, Lijuan DUAN, Kefeng SHANG, Na LU, Yan WU
Abstract:
A gas phase surface discharge plasma system employing wastewater as one of theelectrodes was applied to the degradation of coking wastewater. The main advantage ofthis system is that reactive species like ozone produced by the DBD can be utilized forthe treatment of wastewater. This system was able to remove coking wastewater
effectively, at an initial pH of about 8.5, air flow rate of 1.6 L/min and initial COD
concentration of 160 mg/L with applied voltage 7 kV and frequency 7 kHz, the COD
degradation efficiency reached 51.6% with 60 min. Meanwhile, this paper investigatedthe oxidation performance of coking wastewater combined with Fe2+ and MnO2
catalysts. Their COD removal rates were investigated. In the presence of Fe2+ (0.02
mol/L), the COD degradation efficiency was accelerated due to the generation ofoxidizing hydroxyl radical (•OH), the COD degradation efficiency reached 70.1% with 60
min ,but the COD degradation efficiency decreased with the high concentration of Fe2+.
The results also indicated that MnO2 catalysts could improve the removal of COD
especially in acid solutions, the COD degradation efficiency reached 62.6% with 60 min
at initial pH=1.8, and the dosage of MnO2 had less effect on it in this process.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-5
Title:A Novel Synthesis Technology of Size-Controllable Nano Metal Particle: Solution
Plasma Processing
Affiliation:
Green Mobility Collaborative Research Center, Nagoya University**Materials, Physics and Energy Engineering, Nagoya University***Department of Materials Sience and Engineering, Nagoya University****Graduate School of Engineering, Nagoya University
Author(s):Oi Lun Helena LIO*,**, ***, ****, Kuniko URASHIMA＊, Nagahiro SAITO*,**, ***, ****
Abstract:
Structure-controlled metal nanoparticles (MNPs) were successfully synthesized by an
innovative plasma in liquid method, termed solution plasma processing (SPP).
SPP belongs to a non-equilibrium plasma process which occurred with a discharge
voltage, current and frequency, respectively, in the range of 1 kV, 1 A and 103 Hz.
The process offers a new reaction medium, where the active species and chemical
reactions can be altered by varying the liquid media. There are two different routes toprepare various types of MNPs:(1) reduction of metal ion to pure metal, (2) sputtering directly from electrode. In thisstudy, gold and platinum MNPs synthesized by the above methods will be discussed
separately.
By varying the plasma parameters such as discharge duration, applying voltage andelectrode distance, the size of MNPs can be precisely controlled from few nm to several
tens of nm.
In general, the size of MNPs synthesized from electrode sputtering ranged below 10 nm,
where the diameter of MNPs generated by metallic ion reduction was observed between
10 - 30 nm.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-6
Title:
High-speed camera ｖisualization of electrospray of water
Affiliation:
1Department of Environmental Management Technology, AIST
2Department of Astronomy, Earth Physics and Meteorology, Comenius University
Author(s):H.H. Kim1, B. Pongrac2, Y. Teramoto1, N. Negishi1, Z. Machala2, A. Ogata1
Abstract:
This paper presents the time-resolved imaging of EHD spray of water with different
conductivities for negative and positive DC voltage. Dripping mode, which was the firstmode of EHD spray, occurred in the same pattern regardless of the water and polarity ofvoltage. The most important factor determining the size of droplet is spray pattern justbefore the break-up into droplets. Break-up of long water filaments produced droplets
having similar size of the diameter of parent filament. The time-resolved images
provided some information on the different elongation pattern according to the polarity.
The rotating and stable cone-jet were only observed with positive EHD spray ofdeionized water. The vigorous lashing and swirling movement of water filament also
determine the spray angle and the size of final droplets. On the other hand, negative
EHD spray of tap water occurs only in dripping mode.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-7
Title:
Study on LiNbO3 as Dielectric Barrier Discharge: Its Electrical Properties and ElectricalWind Generation
Affiliation:
Applied Electrostatic Laboratory, Dept. of Environmental and Life Sciences, Toyohashi
University of Technology,
Author(s):Rayendra ANANDIKA, Kazunori TAKASHIMA, Akira MIZUNO
Abstract:
In this study, LiNbO3, an important ferroelectric material, has been used as a barrier forthe dielectric barrier discharge, DBD. The response of the barrier against the alternative
applied voltages has been experimentally studied. The saw-tooth voltage waveform
gives a distinct response of the consumed electrical power because of the hysteretic
relationship between polarization and electrical field. The 0% slope angle or negative
sawtooth voltage waveform consumed the higher electric power than the other slope
angles. Temperature of the barrier and profile of the electrical wind generated in thisconfiguration are also measured to study the influence of the voltage waveform.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aIS-8
Title:The Non-Thermal Plasma Combined with Catalyst of Active Carbon Based on Coal for
Removal of NOx
Affiliation:
1Department of Environmental and Life Sciences, Toyohashi University of Technology,
Japan 2 Anhui University of Science and Technology, China

Author(s):M. Chen1, 2, K. Takashima1, and A. Mizuno1
Abstract:
Abstract — The Non-Thermal Plasma (NTP) combined with catalyst is one of effective
way to remove NOx from the automobile exhaust gas. In this paper the Catalyst of Active
Carbon of based on Coal (CACC) was prepared and evaluated the performances toremove NOx in the DBD reactor. The metal of Copper and Zinc was deposited on thesurface of CACC and used as the active points. The ion of NO3- was detected in theleaching solution of after used CACC by the Nitrate Ion Detector. According to the ion of
NO3- and PH value of the leaching solution, it can conclude that the NO is absorbed in
the CACC surface firstly and then oxidized to NO2 and more oxidized and changed toNO3-. At the reaction of the CACC combined with the NTP, the concentration of NO andNOx reduces down fast at first and then reaches to stable value nearly after 3 min. Itshows the main contribution of removal of NO and NOx is adsorption at first in 3 min.
The concentration of NO and NOx decreases with the increasing of input power. The NO
and NOx removal rate at the CACC combined with the NTP condition is bigger than at
the glass bead combined with the NTP condition. Key Words —Non-Thermal Plasma;
Dielectric Barrier Discharge; NOx removal rate, Catalyst of Active Carbon of based on
Coal第 37 回静電気学会全国大会アブストラクト集
Program number:
11pS-1
Title:
Early Underwater Pulsed High Voltage Discharge Studies with Masayuki Satoand Recent Electrostatic Projects at NASA/KSC

Affiliation:
Department of Physics and Astronomy，Appalachian State Univ.
Author(s):Sid CLEMENTS
Abstract:
In 1985, Sato and Clements investigated prebreakdown phenomena in water for
point-plane geometries using high-voltage pulses. Spot discharges, filamentary magenta
streamers, isolated microdischarges, and microbubbles were observed andphotographed. Emission spectra were obtained using a prism spectrograph. Maximum
streamer lengths were determined as a function of applied voltage, pulsewidth (decay
constant), and water conductivity. The bubbling of gas through the underwater discharge
resulted in the disintegration of the gas bubbles, and also caused gas-phase discharges
to occur near the nozzle electrode. The production of ozone when bubbling oxygen gas
through a discharge in deionized water was investigated by photometrically measuring
the decolorization of anthraquinone dye. In 2003, Clements began collaborating with
the Electrostatics and Surface Physics lab at NASA/KSC working on numerous NASA
electrostatic issues such as Space Shuttle explosion hazards, ESD prevention for the
Hubble telescope repair mission, and precipitation static issues on the new Aries rocket.
In addition, several electrostatic projects are in progress relating to exploration of theMoon and Mars. An electrostatic precipitator is being developed for Martian In-Situ
Resource Utilization oxygen concentrators, as well as an instrument for measuring thesize and charge of individual dust particles on Mars. Paschen gas breakdown tests havebeen conducted for a simulated Martian atmosphere. In addition, an electrodynamic
screen is being developed for removing dust from Martian and Lunar rover solar panels,
space suits and visors, viewports, habitats, and radiators.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pIS-1
Title:PM removal of an electrostatic filtration device combined with a metallic foam filter underhigh velocity and temperature conditions for large volumetric diesel engines
Affiliation:＊ Environmental and Energy Systems Research Division, Korea Institute of Machineryand Materials (KIMM) ＊ ＊ Department of Electrical Engineering and Information
Systems School of Engineering, the University of Tokyo
Author(s):Hak-Joon Kim＊, ＊＊, Bangwoo Han＊, Yong-Jin Kim＊, Hongsuk Kim＊, and Tetsuji
Oda＊＊
Abstract:
An electrostatic diesel particulate matter filtration device has been tested using 4000 cc
diesel engines operating at standard (European Stationary Cycle (ESC) 13 mode)conditions when temperature changed from 300 to 500oC and normal gas flow rate from
2 to 8 m3/min. The device consisted of an electrostatic precipitator with edge to cylinder
type and a metallic foam filter. To minimize the volume of the foam filter and reducepressure drop through the filtration device, the layer of a foam filter was reduced from 20
to 6 layers. PM emission of the newly developed filtration device with 6 layers of foam
sheets was 0.011 g/kWh which was much less than PM regulation of EURO 5 (0.02g/kWh), while the emission of the foam filter made with 20 layers was 0.0235 g/kWh. In
particular, the pressure drop of the device with 6 layers of foam sheets was only 20% ofthat with 20 layers.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pIS-2
Title:
Ferrous Sulfate Enhances Bleaching Effect of Organic Dye Solution by Cold Plasma Jet
Affiliation:
Department of Environmental and Life Sciences, Toyohashi University of Technology
Author(s):○Tomoko NAKAJIMA, Hachiro YASUDA, Hirofumi KURITA,Kazunori TAKASIMA andAkira MIZUNO
Abstract:
Enhancement of bleaching effect of cold plasma jet in aqueous organic dye solution by
combination use with ferrous sulfate has been tried. In presence of ferrous iron, acatalytic reaction which converts hydrogen peroxide to a highly reactive hydroxyl radical
can be induced (Fenton reaction). Indigo carmine and ferrous sulfate were used asorganic dye and ferrous iron source, respectively. Indigo carmine solution (400 mg/l) withvarious concentration of ferrous sulfate were exposed to plasma jet for 3 minutes, andthe degradation of dye was evaluated by optical density at 595 nm (OD595), without
exposure and 1 to 24.0 minutes after the exposure. In result, enhancement of bleachingeffect was achieved by presence of 0.01, 0.1 and 1.0 mM ferrous sulfate during plasma
exposure. Additionally, further bleaching after exposure was observed in 0.01 and 0.1
mM ferrous sulfate. 0.1 mM sulfuric acid during plasma exposure and addition of 0.1 mM
ferrous sulfate after exposure did not reproduce the synergetic residual effect. It can be
expected that proper ferrous sulfate addition enhances both intensity and durability of
degradation effect by atmospheric pressure low-temperature plasma.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pIS-3
Title:
Effects of Reactor Configuration on Benzene Removal via Hybrid Surface/Packed-Bed
Discharge Plasmas
Affiliation:
Institutes of Electrostatics and Special Power, Dalian University of Technology, Dalian,
China
Author(s):Yan WU, Nan JIANG, O Na LU, Kengfeng SHANG, Jie LI
Abstract:
The effects of reactor configuration on the plasma removal of benzene in air weresystematically studied in a hybrid surface/packed-bed discharge plasmas reactor. In thisstudy, the removal efficiency of benzene and energy yield were compared for different
high-voltage electrode (coil electrode) diameters from 0.5 to 1.4, different coil pitches ofhigh-voltage electrode in the range of 2-9 mm and different dielectric barrier (quartztube) diameters in the range of 14-22 mm. The experimental results demonstrated thatthe benzene removal efficiency enhanced with increasing specific energy density (SED)
distinctly, while energy yield deceased simultaneously. The coil electrode with adiameter of 1 mm and a pitch of 7.5 mm appeared to be more advantageous withrespect to both benzene degradation and energy yield. In addition, benzene removal
was strongly dependent on the size of quartz tube, the smaller size (14 mm) quartz tube
exhibited remarkable better removal and energy performance than the bigger size (22mm) one.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pIS-4
Title:High cleaner air delivery rate performance of an two-stage ESP air cleaenr for Indoor Air
Quality with negligible ozone emission by carbon fiber ionizers
Affiliation:＊ Environmental and Energy Systems Research Division, Korea Institute of Machineryand Materials (KIMM) ＊ ＊ Department of Electrical Engineering and Information
Systems School of Engineering, the University of Tokyo
Author(s):Hak-Joon Kim＊, ＊＊, Bangwoo Han＊, Yong-Jin Kim＊, and Tetsuji Oda＊＊
Abstract:
A novel ESP type air cleaner with positive polarity was developed using an ionization
stage with 16 carbon fiber ionizers in each channel, and a collection stage with parallel
metallic plates. Its clean air delivery rate was measured by Korean standard test method
using 0.3 m KCl particles, changing applied voltages and flow rates of the air cleaner.
The experimental results showed that its CADRs were changed from 7.9 to 12.1 m3/min
when applied voltage to ionizers (6 to 8 kV) and collection plates (-5 to -7 kV), and flowrate (10 to 20 m3/min) were varied. In particular, the air cleaner achieved a CADR of
12.1 m3/min with applied voltage of 8 kV to the ionization stage, and of - 6kV to thecollection stage at 18 m3/min, while emitting significant low ozone with a maximum
value of 5.4 ppb for over 12 hours of continuous operation.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pIS-5
Title:
A novel & simple synthesis method for generating nanocarbon-supported metal
nanoparticle for air cathode of Li/Air battery
Affiliation:＊ Graduate School of Engineering, Nagoya University ＊ ＊ Green Mobility
Collaborative Research Center, Nagoya University, *** Ecotopia Science ResearchInstitute, Nagoya University
Author(s):〇Jun Kang*, Oi.Lun.Li** Nagahiro Saito*, **, ***Abstract:
Lithium-air battery, due to its high energy density, has a big potential for future
electrochemical power sources. It has a theoretical energy density equals to gasoline,
and an energy storage is 5 to 15 times greater than that of Lithium-ion battery (1, 2).
However Li/air cell has low rechargeability and its energy performance falls short of thetheoretical estimated value, primarily because the discharge terminates well before allpore volume of the air electrode is filled with lithium oxides. Therefore, the concept ofusing oxygen in a Li-air battery requires an air electrode consists of both proper catalysts
for oxygen reduction(evolution) reaction (ORR, OER) and a highly porous structure.
These two equirements should be considered simultaneously for designing an air
electrode. Here we demonstrate a simple and versatile synthesis of Nano particles(NPs) catalysts with Carbon Nano Ball (CNB) from benzene under solution plasma
process.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-1
Title:
Basic study on Flow Control by Using DC Corona Discharge
Affiliation:
Graduate School of Engineering, Sizuoka University
Author(s):○Yoshinori Mizuno、Marius Blajan, Kazuo Shimizu
Abstract:
A DC corona discharge for active flow control under atmospheric pressure has beendeveloped. A DC corona discharge electrode setup was designed to modify the airflow
on a flat plate. The electrode configuration consisted of sharply pin electrode andgrounded plate electrode. Weak light emission was observed at the edge of pin
electrode with energizing electrode system. The discharge induced airflow called ionicwind whose velocity was measured with a hot wire velocity meter (up to 2 m/s). It wasobserved an increasing
flow velocity by increasing corona discharge voltage. Saturation of the flow velocity
occurred by increasing discharge voltage.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-2
Title:
Degree of cure measurement of painted surface by a non-contact
surface resistivity measurement
Affiliation:*Graduate School of Science and Engineering, Yamagata University．
**KASUGA ELECTRIC WORKS LTD．
Author(s):○Kohei YAMAGUCHI*，Toshiyuki SUGIMOTO*，Nobuo NOMURA**
Abstract:
For evaluating thickness and hardness of the painted surface on the plastic material,
there are only destructive techniques scratching or cutting the cured painted surface. It
is necessary to wait paint curing to make the measurement for feeding back themeasured data to the painting process. The measurement of the surface potential of thecoating film along with the corona charging has been investigated for monitoring of thereal-time curing state. It was found that there was a relationship between the pencil
hardness and the surface potential.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-3
Title:
Low-Temperature Sintering Technique for Dye-Sensitized
OxygenSolar Cells Using Reactive

Affiliation:∗Department of Advanced Energy, The University of Tokyo、∗∗Department of ElectricalEngineering, The University of Tokyo
Author(s):⃝Shungo Zen∗, Ryo Ono∗, and Tetsuji Oda∗∗
Abstract:
Dye-sensitized solar cell (DSSC) requires sintering of TiO2 photoelectrode at 450。ュ
550 .C to be manufactured. However, the high-temperature sintering is disadvantageous
because it limits the use of materials that cannot withstand high temperatures. In ourprevious work, we proposed plasma and low-pressure mercury (Hg) lamp ultraviolet(UV) treatments of the TiO2 electrode to reduce the sintering temperature. It was
concluded that the effect of the surface treatment is due to reactive oxygen species (O3,O, OH) produced by the plasma and UV light. In this paper, we investigate the effect ofeach reactive oxygen specie by changing background gas of the treatment of the TiO2
photoelectrode. It is shown that both O and OH radicals can cause necking of TiO2
nanoparticles, while O3 causes vaporization of solvent and organic binder in the TiO2
paste. In addition, we propose a new treatment technique for the TiO2 photoelectrodeusing a Xe2 excimer lamp, which efficiently produces O and OH radicals compared withthe low-pressure Hg lamp. For 250-.C sintering, the UV treatment time is reduced by anorder of magnitude by using the Xe2 excimer lamp instead of the low-pressure Hg lamp.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-4
Title:
Aging Characteristics of performance of the slightly reduced TiO2 photocatalyst
Affiliation:*College of Industrial Techology, Nihon University，**Tokyo University of Sience
Author(s):○Shota YAZAWA*, Tomohiko TAKEUCHI**, Shota ARAKI**, Yusuke KUDO*, Tetsuya
NAKANISHI*, Noboru KATAYAMA** and Sumio KOGOSHI**
Abstract:
A photocatalyst is attracting widespread attention because it works semipermanently
under light irradiation. A photocatalyst has useful characteristics such as an oxidative
decomposition and a super-hydrophilicity. However, TiO2 photocatalysts which areoften used can be activated only by ultraviolet rays. A slightly reduced TiO2 is one ofvisible light responsible photocatalysts. A slightly reduced TiO2 can be produced with
H2-plasma surface processing. In this study, we have focused on aging characteristicsof the slightly resuced TiO2 photocatalyst. The performance of produced slightly
reduced TiO2 photocatalysts kept changing for one month. After that, the performance
was stable for six months.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-5
Title:
Modeling of gasdynamic effects in an atmospheric pressure streamer discharge
Affiliation:
The University of Tokyo
Author(s):○Atsushi Komuro, Ryo Ono
Abstract:
The mechanisms of gas dynamics occurred in an atmospheric-pressure streamer
discharge are studied with our previously developed two-dimensional streamer
discharge simulation model. In this paper, the effects of gas dynamics which is inducedby the fast gas heating in an atmospheric pressure streamer discharge are modeled.
The simulation shows that the streamers generate a thermal shock near the anode point,
and the gas expand with a propagation velocity of the speed of sound in air. After thethermal shock, the gas gradually diffuses and therefore the temperature decreases.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-6
Title:
Generation of Atmospheric-pressure Mist Plasma Jet and its Characteristics
Affiliation:
Graduate School of Science and Technology, Kumamoto University,
Japan＊
Priority Organization for Innovation and Excellence, Kumamoto University,
Japan＊＊
Institute of Pulsed Power Science, Kumamoto University,
Japan＊＊＊

Author(s):○ Norimitsu Takamura ＊ ， Douyan Wang ＊ ＊ ， Takao
Akiyama*namihira***,Hidenori

Namihira＊＊＊，Hidenori Akiyama＊

Abstract:
Atmospheric-pressure plasma jets have much attracted attention in the field of medical
applications, especially for such uses as surface treatment, sterilization, and tooth
whitening. These applications are based on various phenomena produced by theplasma jets, such as UV light emission, electrons, ions, and radicals. Especially, in thecase of sterilization, it has been known that OH radical produced by the plasma jets is
one of most important factor to cause cells death. In this study, we focused on increasing
the amount of OH radical production, and tried to generate Mist plasma jet as alternative
to traditional method using only dry helium gas, called as Dry plasma jet.
In this study, it was found that 18 kHz, 18 kV, and 5 L/min of helium gas flow rate werebest conditions to generate each plasma jet.
Furthermore, we measured the amount of OH radical produced by each plasma jet andcompared its production ratio with each plasma jets. As a result, in the case of Mist
plasma jet, the highest production ratio of OH radical was shown. This result suggeststhat Mist plasma jet has a possibility to increase the efficiency of sterilization or various
medical applications using the plasma jets.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-7
Title:
Nanosecond time-resolved observation of underwater primary streamer
Affiliation:
Graduate School of Engineering, Tohoku Univ.＊, Department of Electrical & Electronic
Engineering, Oita Univ.＊＊、Institute of Fluid Science, Tohoku Univ.＊＊*
Author(s):◯Hidemasa Fujita＊、Seiji Kanazawa＊＊、Kiyonobu Ohtani＊＊＊、Atuski Komiya＊＊＊、Toshiro Kaneko＊、Takehiko Sato＊＊＊
Abstract:
A series of the propagation processes of a primary streamer was visualized with an
exposure time of 5 ns at 100 Mega frame per second (100 Mfps) by the use of an ultra
high-speed camera with a microscope lens when a single-shot pulsed positive voltage
was applied to a needle-to-wire electrode system, set in quartz glass cell filled withultrapure water. From the synchronization of the pictures with the current waveform, it
was found that a primary streamer propagated during the flow of pulsed repetitive
currents. The propagation velocity was almost constant while pulsed currents weredetected on the current waveform.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-8
Title:
Study of Low Frequency Electric Field Induced by Charge Oscillation
Affiliation:
National Institute of Advanced Industrial Science and Technology
Author(s):○ Kazuya KIKUNAGA, Hiroshi YAMASHITA, Masahiro EGASHIRA and Kazuhiro
NONAKA
Abstract:
Electric field induced by charge oscillation has been characterized by means ofsimulation of electric field distribution by Method of Moment in the Frequency Domain.
Also, an electric field was induced by the spatial oscillation of a sample applied direct
voltage. The simulation and evaluation of the electric field are clarified that the efficiency
for inducing electric field bear a proportionate relationship to amplitude displacement ofa charged object, and it is possible to detect the electric field from the top to the side of
the object.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-9Title:
Relative Humidity Measurement by Laser Induced Fluorescence
Affiliation:
The University of Tokyo, *Iwate University
Author(s):Ippei YAGI, Ryo ONO, Tetsuji ODA, *Koichi TAKAKI
Abstract:
Spatially-resolved humidity distributions on wet surfaces with dry-gas flow are measured
by laser induced fluorescence method. The quenching rate of H 2 O for NO(A) state isutilized for detections of relative humidity. The spatial resolution is 1×0.2 mm
2 settled by laser thickness. Dry gases spread along the wet surfaces with increasing
flow rate. The relative humidity becomes higher toward outside of the flow.
Diffusion layers are compressed by higher flow rate. A humidity at an agar surface
instead of human skin is 60-70% lower than a water surface.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-10
Title:
Inactivation of Staphylococcus aureus on Electrode by Ozone
Affiliation:
Kanagawa Institute of Technology
Author(s):○Ryoya MANO，Hirotaka MIYASHITA，Yoshihiro KAWADA，Akinori ZUKERAN，Jun
SAWAI
Abstract:
The inactivation of Staphylococcus aureus by ozone was investigated using corona
discharge, which was generated in atmospheric air. The experimental system consistedof high voltage spike-plate electrode and grounded plate electrodes, which spacing is 10mm. Staphylococcus aureus were deposited on the grounded plate electrode, and thenexposed in the corona discharge or the electrostatic field. The applied voltage was
between DC -6.2kV and -10kV, ozone concentration was between 0.06 ppm and 5 ppm,
the exposure time was between 1 h and 8 h, the gas velocity was 0.5 m/s. The influenceof corona discharge and the ozone concentration on the inactivation was investigated.
The influence of the exposure time was also investigated. As a result, it was indicatedthat the effect of corona discharge on the inactivation was greater than that ofelectrostatic field in the air included ozone. However, the survival in electrostatic field
decreases with increasing the exposure time due to the effect of ozone.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-11
Title:
Inactivation of Caenorhabditis elegans with pulsed electric field treatment
Affiliation:
Graduated School of Engineering, Gunma University
Author(s):◯Takanori TANINO, Takuya OKADA and Takayuki OHSHIMA
Abstract:
Inactivation of Caenorhabditis elegans in pulsed electric field (PEF) was studied.
Experimental results and electric field strength simulation in the treatment chamberindicated that C. elegans could be inactivated in the electric field strength of 1 kV/cm.
Because general bacterial cells can be inactivated in the field strength of 10 kV/cm,
nematode seems to be very sensitive toward PEF. We also compared the inactivating
efficiency of the egg, larva, and adult C. elegans with PEF treatment. The egg was mostsensitive to PEF treatment, more than 90 % of the C. elegans egg was inactivated after
4.0 kV and 2 sec of PEF treatment. Although the larva, and adult C. elegans was
resistant to PEF treatment, the survival ratio 1 day after PEF decreased than that justafter PEF treatment. Fluorescence microscopic analysis of fluorescently-stained C.
elegans after PEF treatment showed that the head, tail, epidermis and muscle of C.
elegans tend to be damaged by PEF treatment. And it was suggested that inactivation
measurement method based on ATP content could be partially applied to inactivation
measurement of C. elegans.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-12
Title:
Influence on Plant Growth by Irradiation of Atmospheric-pressure LF Plasma Jet onto
the Seed
Affiliation:
Department of Electrical and Electronic Engineering, OitaUniversity
Author(s):〇Kei ETO, Yuki ANAN, Shuichi AKAMINE, Ryuta ICHIKI, Seiji KANAZAWA
Abstract:
In this study, seeds of radish sprouts were irradiated by atmospheric-pressure low
frequency (LF) plasma jet. Here, helium gas was used as an operating gas. We
evaluated influence of the atmospheric-pressure plasma jet on growth of the plants bymeasuring the stem of radish sprouts and comparing with a control group. We alsomeasured concentration of glucose in the seeds. As a result, growth of the plants which
was immersed into water before the plasma jet irradiation was enhanced compared withthe control group. Moreover, we found that the concentration of glucose in the seeds
was increased.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-13
Title:
Plasmonic imaging of Brownian motion of single DNA molecules spontaneously binding
to silver nanoparticles
Affiliation:*Health Research Institute, National Institute of Industrial Science and Technology(AIST), **Department of Physics, Kyoto University, ***Faculty of Life and Medical
Sciences, Doshisha University, ****Department of Applied Chemistry, Graduate Schoolof En
Author(s):○ Tomomi ISHIDO*, Yuko YAMAMOTO*, Masatoshi ICHIKAWA**,YOSHIKAWA***, Yoshinobu BABA****, Tamitake ITOH*, Ken HIRANO*

Kenichi

Abstract:
We report on video-rate imaging of single DNA molecules labeled with silver
nanoparticles (AgNPs) in aqueous solution. Mn2+ (3 mM) is added to promote DNA
binding to AgNPs. The effectiveness of this approach was verified by fluorescent
microscopy, SEM, and UV-vis spectroscopy. Dark-field optical microscopy enables the
Brownian motion of single DNA molecules to be analyzed through AgNP plasmon
resonance scattering. Video-rate imaging of single DNA molecules at 30 fps is possible.
In addition, dark-field optical microscopy uses inexpensive equipment, in contrast to
fluorescence microscopy. The proposed method also overcomes the drawbacks to using
fluorophores and QDs for DNA labeling, thereby enabling longer observation times andpH-independent observations. Thus, this study is expected to contribute to the study of
topics including single-molecule DNA dynamics and DNA/protein interactions.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-14
Title:
Apoptosis Induction of Murine Skin Cancer Cell by Atmospheric Pressure Plasma Using
Nanosecond Pulsed Power Generator
Affiliation:*The University of Tokyo, **Toyohashi University of technology, ***Iwate University
Author(s):○Kenta HIRAKATA*, Ippei YAGI*, Ryo ONO*, Tetsuji ODA*, Kazue MIZUNO*，Hirohumi
KURITA**, Akira MIZUNO**, Koichi TAKAKI***
Abstract:
Recently it is expected that atmospheric pressure plasma is useful to induce apoptosis,
and plasma is used to cancer treatment. We used murine skin cancer cell （B16F10）
and irradiated plasma to this cell. So according to plasma irradiating time and gas, cells
either increase or decrease. And we detected apoptosis with AnnexinV/PI staining.
Moreover we compared cancer cell and fibroblast cell （NIH3T3）, and we verified thedifference of effect between cancer cell and fibroblast cell.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-15
Title:A new fabrication method of in vivo protein array with high voltage pulse application
Affiliation:
Graduate School of Engineering, Gunma University
Author(s):〇 Hidefumi Miyata, Yuto Ishiguro, Nobuyuki Oshima, Ayumu Utsumi, Syunsuke
Takahashi, Masahiko Oshige and Shinji Katsura
Abstract:
This paper reports a new method of ''in situ'' immobilization of recombinant proteins on amodified gold substrate. His-GFP (His-tagged Green Fluorescent Protein) was used as
the recombinant protein in this article. Escherichia coli bacteria bearing His-GFP
molecules soaked in lysozyme solution to hydrolyze the peptidoglycan layer of E. coli
bacteria. Then, the treated E. coli bacteria were spotted on the gold substrate and highvoltage pulses were applied to the substrate. The remaining inner cell membrane of E.
coli were broken down by the application of HVP (High voltage pulse), resulted inrelease of the cytosol protein and His-GFP molecules. The released His-GFP molecules
were immobilized on the surface of the gold substrate through specific interaction
between His-tag and tag-recognition group. Amount of immobilized His-GFP molecules
were estimated with the fluorescence intensity. When the charging voltage was 10 kV,
the fluorescence intensities reached plateau at three pulses in number of the applied
pulses. The threshold amount of the charging voltage was 3 kV when HVP were applied
three pulses. Those immobilized His-GFP were released by washing with imidazole,suggesting that the immobilization involved specific binding between the His-tag and the
tag-recognition group.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11aC-16
Title:
A novel gene transfection technique using water-in-oil droplet in an electrostatic field
Affiliation:
Department of Environmental and Life Sciences, Toyohashi University of Technology＊
Author(s):○Shota Takahashi, Hirofumi Kurita, Atsushi Asada, Rika Numano, Kazunori Takashima
and Akira Mizuno
Abstract:
In this study, we have demonstrated a method for gene transfection quite different fromconventional one. This method is based on water-in-oil droplet manipulation by using
electrostatic force. When a water droplet is placed in oil, it is driven between a pair ofelectrodes by applying a DC electric field. This droplet motion is brought about asfollows :a droplet is carried to one electrode by coulomb force possibly due to inherent charge.
When the droplet touches to the electrode it is charged with the same polarity as theelectrode. The droplet then moves to the other electrode and the same process occurs
repeatedly. In this process, local and intense electric field is applied to the droplet in avery short time when it touches the electrode. This local intense electric field must workon a gene transfection. We have investigated a gene transfection by using the droplet
containing cultured mammalian culture cells (HEK293 cell) and foreign plasmid DNA(CMV-Venus plasmid)

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pC-1
Title:
Investigation of Metabolic Characteristics for Heat-Treated Yeastby Dielectrophoretic
Velocimetry
Affiliation:
Tokyo Metropolitan Univ.
Author(s):○Shin TAKAZAWA, Naoki SHIRAI, Satoshi UCHIDA, Fumiyoshi TOCHIKUBO
Abstract:
Constant monitoring and detailed inspection of microbial metabolism have been required
for advanced quality control in food industry and medical practice. In the present work,
the change in metabolic states for injured Saccharomyces cerevisiae (S. cerevisiae) withheat treatment was investigated using dielectrophoretic (DEP) velocimetry in a
micro-cell. Fluorescent observation of stained S. cerevisiae showed gradual destructionof the membrane structure by heat treatment. Numerical analyses of Clausius-Mossotti
function for various electrical parameters clarified that DEP velocity depends strongly on
inner-wall conductivity from 0.1 to 1 MHz and cytoplasmic conductivity from 1 to 10 MHz.
These results suggest that DEP velocimetry would be available for rapid and simple
estimation of the metabolic states.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pC-2
Title:Development of Direct Gene Delivery System into Adherent Cell Nucleus Using On-Chip
Electroporation
Affiliation:*Dept. Bioengineering, The University of Tokyo, **Dept. Mechanical Engineering, The
University of Tokyo, ***Center for iPS Cell Research and Application, Kyoto University,****Dept. Mechanical Engineering, Kyoto University
Author(s):Osamu KUROSAWA*, Kennedy OMONDI OKEYO**, Hidehiro OANA**,Keisuke
OKITA***, Hidetoshi KOTERA****, Masao WASHIZU*,**
Abstract:
We developed a novel gene delivery system based on on-chip electroporation for
introduction of plasmids directly into the nucleus of adherent cell by electrophoresis. The
orifice sheet with adherent cells was inserted between AgCl electrodes and a pulse of
4V-200msec was applied in a DMEM medium containing GFP plasmids. Most cells
showed GFP expression within 2 hours after pulsation, suggesting that the plasmid was
directly introduced into the cell nucleus. Making the orifice pitch nearly equal to nucleus
diameter increased the effect of field constriction at a micro orifice, resulting in higher
yield of GFP expression. We applied this direct gene delivery system to produce iPS
cells. After introduction of Yamanaka factors, cells were cultured on the orifice sheet forthree weeks after electroporation, and then reprogramming of nucleus was checkedusing Oct4 and Nanog antibodies.Cells which had formed colony stained positive forboth antibodies of
Oct3/4 and Nanog, showing successful reprogramming of cell nucleus.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pC-3
Title:
Investigation of Dielectrophoresis of Adenovirus and Rotavirus
Affiliation:
Faculty of Information Science and Electrical Engineering, Kyushu University
Author(s):Michihiko Nakano, Ryoji Obara, Zhenhao Ding, Junya Suehiro
Abstract:
In this study, it was measured that dielectrophoretic properties of adenovirus androtavirus. There is a great concern about virus thread. Goal of this study is to detect virusby dielectrophoretic impedance measurement (DEPIM) method, which based ondielectrophoretic trapping of target materials on a microelectrode and measurement ofimpedance change due to the trapping. DEPIM is a simple and sensitive method andhas been in practical use for detecting oral bacteria. To apply DEPIM for virus detection,dielectrophoretic property of virus should be known. Dielectrophoresis offluorescent-labeled adenovirus and rotavirus were optically observed under various
conductivity of suspending mediums. Then, crossover frequencies of the viruses were
determined.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pC-4
Title:
Electrofusion Employing Electric Field Constriction for High Yield Generation of
Hybrodomas for Monoclonal Antibody Production
Affiliation:
Department of Mechanical Engineering, University of Tokyo, **Department of
Bioengineering, University of Tokyo, ***Department of Microengineering, Kyoto
University
Author(s):Kennedy O. OKEYO*, Yasuhiro NISHIGAICHI**, Takehiro KONDO*, Osamu
KUROSAWA**, Hidehiro OANA*, Hidetoshi KOTERA***, and Masao WASHIZU**
Abstract:
A high-yield electrofusion method has been developed for the fusion of B-cells withmyeloma cells to form hybridomas for monoclonal antibody production. The method
utilizes dielectrophoretic force (DEP force) due to electric-field constriction at a
micro-orifice to manipulate and position B-cells and myeloma cells one-to-one on
opposite sides of multiple micro-orifices embodied on a thin insulating membrane. By
using a low conductivity medium, cells on either side of each micro-orifice could be
brought into contact by applying a 5V DEP voltage at 1MHz, and a fusion efficiency of
80% was realized by applying a 3-5V pulse voltage for 100 s. Fused cells were
harvested and cultured in HAT medium, resulting in the formation of multiple colonies
after 3 days of culture, suggestive of successful hybridoma formation. Moreover, theyield rate, as determined by the ratio of the number of B cells to the number of colonies
formed, was 2×10-3, which is 20-2000-fold higher than that obtained by the typical PEG
fusion method. Thus, the micro-orifice-based electrofusion method can be used togenerate hybridomas for monoclonal antibody production with B cells harvested from thelymph at a much lower cost compared to the typically used spleen.

第 37 回静電気学会全国大会アブストラクト集
Program number:
11pC-5
Title:
Medical Application of Pulse Power in Edo and Meiji Periods
Affiliation:
Graduate school of Tottori University
Author(s):Ryo NISHIMURA
Abstract:
Friction generators came to Japan in the 18th century. It was firstly introduced by Rishun
Goto (1702-1771), a scientist, in his book as a medical apparatus that could remove pain.
Since then, an electric power, especially pulse power, was believed to cure various kindsof illnesses. Many apparatuses that generated pulse power were produced as medical
apparatuses during late Edo and Meiji periods. Teijun Yamada (? ~ 1905) and Housaku
Sugisei (? ~ ?) edited books titled “Naifukudoukou” about medical external treatments in
mid-19th century (end of Edo period). Mechanism and efficacy of two kinds of pulse
power enerators are described in the books. One is a friction generator and the other isa booster circuit that boosts a voltage of Volta’s battery by using a switching device anda transformer.
This paper describes the medical application of pulse power in end of Edo and Meiji
periods based on “Naifukudoukou” and an instruction book on medical apparatuses
published in Meiji period.