نتایج جستجو برای: electromagnetic radiation
تعداد نتایج: 286933 فیلتر نتایج به سال:
Introduction: The highest electromagnetic radiation pollution is related to the radiofrequency waves of mobile phones (1). Up to 70% of these waves can be absorbed by various tissues (2). Absorption of these waves can damage the body tissues by causing oxidative stress (3). Given that melatonin plays an antioxidant role, it seems that this hormone can have a protective effect on the hepato- tox...
Here we investigate the effect of electromagnetic waves with high radio frequency radiation on the antioxidant enzyme activities and seed germination of Zea mays. Three groups of Zea mays seeds were used in this study. The first group was only exposed to RF radiation emitted from the mobile phone simulator. The second group was only exposed to RF radiation emitted from the mobile phone simulato...
This paper presents an attempt to unify gravity and electromagnetism associated with «holes » and « bumps » in the covariant density distribution of a real average covariant Dirac aether built with extended random elements filling flat spacetime. Some possible experimental tests are also discussed.
An all-dielectric semispherical lens with functions in shaping 3D wave-propagation paths is proposed and experimentally verified. When radiation sources are placed in the central region, the lens behaves as a magnifying device to resolve the sources in subwavelength scale; while when the electromagnetic waves impinge on the semispherical lens from outside, they will be guided spirally inward.
We study the gravitational properties of a global monopole in (D = d + 2) dimensional space-time in presence of electromagnetic field.
With the increasing knowledge of shortwave radiation, it is widely used in wireless communications, radar observations, industrial manufacturing, and medical treatments. Despite of the benefits from shortwave, these wide applications expose humans to the risk of shortwave electromagnetic radiation, which is alleged to cause potential damage to biological systems. This review focused on the expo...
Electromagnetic radiation emitted by man made sources has been a cause for concern in recent decades. It has been feared that the proliferation of electromagnetic devices may have a detrimental effect on biological organisms. For instance, numerous recent studies have focussed on the possible biological ill effects of EM radiation. This paper proposes a novel approach to the a priori assessment...
Effects of solar wind and solar electromagnetic radiation on motion of asteroids are discussed. The results complete the statements presented in Vokrouhlický and Milani (2000). As for the effect of electromagnetic radiation, the complete equation of motion is presented to the first order in v/c – the shape of asteroid (spherical body is explicitly presented) and surface distribution of albedo s...
The Dirac equation is solved for two novel terms which describe the interaction energy between the half integral spin of a fermion and the classical, circularly polarized, electromagnetic field. A simple experiment is suggested to test the new terms and the existence of radiation induced fermion resonance. ——————————– Recently, Warren et al. [1,2] have made the first attempt to detect radiation...
This paper shows that the backscattering of electromagnetic and gravitational waves can be dominant when the radiation is produced very close to a spherical black hole. Numerical investigation shows that almost 50 percent of the outgoing quadrupole gravitational wave is backscattered, for a class of initial data. A similar analysis reveals at least 20 percent effect for a dipole electromagnetic...
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