BACKGROUND Although the aetiology of glioma is poorly understood, the higher incidence in males has long suggested an occupational cause. AIM To investigate possible associations between occupational exposure to ionizing, ultraviolet (UV), radiofrequency (RF) and extremely low frequency (ELF) radiation and adult glioma risk. METHODS Case-control study using histologically confirmed cases of...

Aims. In this paper, we investigate the behaviour of the number of Lyman continuum ionizing photons as compared to the actual number of hydrogen recombinations in HII galaxies. Methods. We evaluate the number of ionizing photons from the population synthesis of spectra observed in the visible, extrapolating the spectra to the extreme ultraviolet (EUV), beyond the Lyman limit. We check for possi...

The radiofrequency electromagnetic fields (RF-EMFs) produced by widely used mobile phones are classified as possibly carcinogenic to humans by International Agency for Research on Cancer (IARC). Current data on the relationship between exposure to RF-EMFs generated by commercial mobile phones and brain cancer are controversial. Our studies show that this controversy may be caused by several par...

The primary purpose of this chapter is to provide public health officials, toxicologists, and other interested individuals and groups with an overall perspective of the health physics and toxicology of ionizing radiation. It contains descriptions and evaluations of radiological and toxicological studies and epidemiologic investigations and provides conclusions, where possible, on the relevance ...

iran is one of several countries that has regions of high dose natural ionizing radiation. two wellknown villages in the suburb of ramsar town in the caspian sea strip, taleshmahaleh and chaparsar, have background radiation that is 13 times higher than normal. this radiation is the result of radium 226 and radon gas both of which are highly water soluble. while people living in these regions do...

We discuss recent results on the ionizing fluxes of O stars obtained from our “combined stellar structure and atmosphere models” (CoStar) accounting for stellar winds, non-LTE effects and line blanketing. The implications on the ionization structure of H ii regions are summarized, and observational constraints on the ionizing spectra and the total ionizing photon fluxes are presented. Using our...