Influence of Electron Beam Irradiation on The Nucleation of Fine Water Drops on Misted Silicate (SiO2) Glass

1998 ◽  
Vol 540 ◽  
Author(s):  
K. Oguri ◽  
K. Sato ◽  
T. Izumi ◽  
A. Tonegawa ◽  
K. Takayama ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Surface Condition ◽  
Active Surface ◽  
Esr Spectra ◽  
Dangling Bond ◽  
Beam Irradiation ◽  
Nucleation Frequency ◽  
Spin Resonance ◽  
Water Drops

AbstractBy using an electron beam irradiation, reproducible active surface condition of misting can be obtained on the silicate glass. Since an electron beam irradiation activates the SiO2 surface, it controls and enhances the nucleation frequency of fine water drops. The dangling bond is one of reasons to activate the surface condition. Based on the results of electron spin resonance (ESR) spectra, the electron beam irradiation increases the density of E'-center on the surface.

Detection of Free Radicals in Electron Beam-Irradiated Mucuna pruriens (L. DC.) Seeds by Electron Spin Resonance

2007 ◽  
Vol 13 (4) ◽  
pp. 249-257 ◽  
Author(s):  
R. Bhat ◽  
K.R. Sridhar
Keyword(s):  
Electron Beam ◽  
Free Radicals ◽  
Seed Coat ◽  
Signal Intensity ◽  
Electron Beam Irradiation ◽  
Linear Increase ◽  
Mucuna Pruriens ◽  
Beam Irradiation ◽  
Satellite Peak ◽  
Spin Resonance

Electron spin resonance (ESR) spectroscopy was employed to detect free radicals in raw Mucuna pruriens (velvet bean) seeds after electron beam irradiation (Microtron source: 0, 2.5, 5, 7.5, 10, 15 and 30 kGy) and conventional processing (roasting, powdering and cooking). The ESR signal of irradiated seeds (g=2.0055±0.0001) was more prominent in the seed coat than cotyledon. Seed coat of irradiated samples showed dose-dependent linear increase of this signal (g = 2.0055) accompanied by a weak triplet (satellite peak; aH = 3 mT) produced exclusively by radiolysis and could be used as an indication of successful irradiation. Irradiated cotyledon portion devoid of satellite peak (triplet) showed a linear increase in signal intensity up to 10 kGy with a sharp decline at higher doses (15 and 30kGy). Stability of radiation-induced ESR signals after 6 months of storage (25 ± 1°C) revealed the presence of a weak triplet with a substantial loss of signal intensity. Thermal effects such as roasting and powdering of seeds increased the signal intensity (g = 2.0055) similar to or in greater proportion than irradiation. Phenolics in seeds, which contribute significantly to detect free radicals in vegetative parts of a plant showed a waning trend in seed coat, while it was vice versa in cotyledon. Textural studies revealed significant loss in firmness after irradiation (p<0.05), which might favour in minimising the cooking time. Results of the present study might help to divulge the beneficial effects of application of electron beam irradiation technology as a better alternative to fumigants in seed preservation for safety and quarantine purposes.

Surface condition change of ceramics materials using of low energy electron beam irradiation

2002 ◽  
Vol 2002.2 (0) ◽  
pp. 467-468
Author(s):  
Kazuya OGURI ◽  
Naoki YAMAGUCHI ◽  
Kohsuke TAKAHASHI ◽  
Akira TONEGAWA ◽  
Yoshitake NISHI
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Surface Condition ◽  
Low Energy ◽  
Energy Electron ◽  
Beam Irradiation ◽  
Condition Change ◽  
Low Energy Electron

Defect Creation by Electron Beam Irradiation in Amorphous Silicon Nitride Films Compared with That by Light Soaking

2001 ◽  
Vol 664 ◽  
Author(s):  
Tatsuo Shimizu ◽  
Yuji Kawashima ◽  
Minoru Kumeda
Keyword(s):  
Electron Beam ◽  
Silicon Nitride ◽  
Spin Density ◽  
Electron Beam Irradiation ◽  
Dangling Bond ◽  
Beam Irradiation ◽  
Amorphous Silicon Nitride ◽  
Silicon Nitride Films ◽  
Defect Creation ◽  
G Value

ABSTRACTDefect creation by electron beam irradiation is compared with that by light soaking in a-Si1-xNx:H films. For the film with x=0.06, the ESR spin density increases by 20-keV electron beam irradiation without changes in the g-value. However, for the film with x=0.47, the ESR spin density increases with accompanying the decrease in the g-value from 2.0042 to 2.0034. The decrease in the g-value can be explained by increasing number of N atoms at the backbond site of the Si atom having the dangling bond. Light soakings does not change the g-value of the ESR signals of the films.

Influence of sheet electron beam irradiation (SEBI) on water wettability of hydroxy apatites for artificial bone

1996 ◽  
Vol 463 ◽  
Author(s):  
J. Kawano ◽  
H. Izumi ◽  
K. Oguri ◽  
A. Tonegawa ◽  
T. Kawai ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Surface Condition ◽  
Rate Process ◽  
Artificial Bone ◽  
Beam Irradiation ◽  
Hydroxy Apatite ◽  
Water Wettability ◽  
Sheet Electron Beam ◽  
Bio Compatibility

ABSTRACTAn influence of sheet electron beam irradiation (SEBI) on the wettability is investigated of the hydroxy apatite (HAP) [Ca10(PO4)6(OH)2]. The wettability is one of the important factors to control bio-compatibility. The SEBI is homogeneously performed by an electrocurtain processor. The temperature of the sample is below 323 K just after the irradiation. The wettability is evaluated by measuring the wet angle θ in a drop of water. The SEBI increases the wettability. Based on rate process, the influence of SEBI on wettability is discussed. Using the SEBI, we can precisely control the surface condition of HAP.

Electron Spin Resonance Studies on Electron Beam Irradiated Carbon Nanotubes Dispersed in Styrene-Isoprene-Styrene Block Copolymer

2004 ◽  
Vol 851 ◽  
Author(s):  
Mircea Chipara ◽  
Wendland Beezhold ◽  
Timothy Webb ◽  
Jeffrey M. Zaleski ◽  
Kristina Stephenson ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Electron Beam Irradiation ◽  
Electron Bombardment ◽  
Beam Irradiation ◽  
Spin Resonance ◽  
Radiation Induced

ABSTRACTElectron spin resonance investigations on the effect of electron bombardment of nanocomposites obtained by dispersing carbon nanotubes within styrene-isoprene-styrene are reported. The experimental results revealed the absence of radiation-induced free radicals and a negligible effect of electron beam irradiation on the electron spin resonance spectra of carbon nanotubes.

Methods to Monitor and Improve the Performance of Specimen Holders for Transmission Electron Cryomicroscopy

1996 ◽  
Vol 54 ◽  
pp. 454-455
Author(s):  
B. L. Armbruster ◽  
B. Kraus ◽  
M. Pan
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Quality Of Data ◽  
Electron Cryomicroscopy ◽  
Thermal Equilibration ◽  
Transmission Electron ◽  
Electron Microscopes

One goal in electron microscopy of biological specimens is to improve the quality of data to equal the resolution capabilities of modem transmission electron microscopes. Radiation damage and beam- induced movement caused by charging of the sample, low image contrast at high resolution, and sensitivity to external vibration and drift in side entry specimen holders limit the effective resolution one can achieve. Several methods have been developed to address these limitations: cryomethods are widely employed to preserve and stabilize specimens against some of the adverse effects of the vacuum and electron beam irradiation, spot-scan imaging reduces charging and associated beam-induced movement, and energy-filtered imaging removes the “fog” caused by inelastic scattering of electrons which is particularly pronounced in thick specimens.Although most cryoholders can easily achieve a 3.4Å resolution specification, information perpendicular to the goniometer axis may be degraded due to vibration. Absolute drift after mechanical and thermal equilibration as well as drift after movement of a holder may cause loss of resolution in any direction.

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