Results 251 to 260 of about 401,467 (301)
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Electron Irradiation of Polythene
Nature, 1954CONSIDERABLE attention has recently been given to the effects of high-energy radiation on polymeric substances1. The effects would appear to be of the same fundamental character whether X-rays, electron bombardment, or the mixed radiations of the atomic pile are used; it is reported that in the absence of oxygen the dominant reactions are either cross ...
A. C. BASKETT, C. W. MILLER
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Electron Spin Resonance of Irradiated DNA
The Journal of Chemical Physics, 1963The electron spin resonance (ESR) spectra of free radicals formed in-the sodium salt of desoxyribonucleic acid (DNA) by 1-Mev electrons were examined. Dry samples were irradiated at approximates 200°K and examined at 77°K at microwave power levels below approximates 0.1 mw. At levels below 1 Mrad only a single, rather broad absorption line was seen. At
R, Salovey, R G, Shulman, W M, Walsh
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Pulmonary sequelae after electron spinal irradiation
Radiotherapy and Oncology, 2001We measured pulmonary function in 21 patients, after craniospinal irradiation with a posterior spinal electron beam. The median age at treatment was 7.5 years. Nine patients (43%) demonstrated abnormal pulmonary function tests, five with restrictive changes, one with isolated diminished diffusion capacity, and three with obstructive disease.
T J, Endicott +5 more
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Gamma and electron irradiation
Physics Bulletin, 1969The UK Panel on Gamma and Electron Irradiation was set up in 1963 by the coming together of industrial organizations, the UK Atomic Energy Authority, the Ministry of Health and interested individuals mainly from the universities. Originally its purposes were connected with the promotion of fundamental and applied research into the use of radiation for ...
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Electron beam irradiation of dental composites
Dental Materials, 2005Electron beam irradiation can be used to influence the mechanical properties of polymers. It was the aim of this study to investigate whether dental composites can benefit from irradiation in order to achieve increased fracture toughness, work of fracture, hardness or less wear.Two hundred rectangular specimens of five veneering composites were ...
Michael, Behr +3 more
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Effects of Electronic Irradiation on Fats
Nature, 1952IRRADIATION with high-velocity electrons has recently been shown to produce changes, apparently of an oxidative nature, in the fatty components of foods1–3, and further investigation of the phenomenon with butter-fat has revealed a number of interesting features. In the experiments we describe, samples 2–3 mm. thick were irradiated in the electron beam
R S, HANNAN, J W, BOAG
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Electron paramagnetic resonance of electron-irradiated GaP
Physical Review B, 1981An electron paramagnetic resonance (EPR) study of electron-irradiated GaP is presented with emphasis on the properties of the isolated gallium vacancy which can be deduced from its EPR. Further confirmation of the assignment of this spectrum to the vacancy is presented with additional discussion of defect structure. Details of the optical excitation of
T. A. Kennedy, N. D. Wilsey
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Electron trapping in electron-beam irradiated SiO2
Journal of Applied Physics, 1978In addition to the well-known positive space charge, electron irradiation of MOS capacitors with 25-keV electrons is shown to introduce additional uncharged electron traps into the oxide layer. These traps persist after most of the positively charged defects have been removed by the usual low-temperature (? °C) anneals. Their presence after this anneal
J. M. Aitken, D. R. Young, K. Pan
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Megavolt electron irradiation for localized mycosis fungoides
International Journal of Radiation Oncology*Biology*Physics, 1979A retrospective analysis was carried out to evaluate the effectiveness of small field megavolt electron irradiation for localized mycosis fungoides. Only local field electron beam therapy was employed for limited disease reserving total skin electron irradiation for multiple lesions or diffuse disease covering at least 25 per cent of the entire body ...
T C, Lo +3 more
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Cooperative Transport Effects in Electron-Irradiated Glasses
Physical Review Letters, 1985Cooperative effects during both alkali-Ca and Na-K migration under electron irradiation of glasses have been pointed out for the first time by analysis of experimental data in the framework of the thermodynamics of irreversible processes.
Miotello, Antonio, P. Mazzoldi
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