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Humans live and breathe every day in an environment full of natural and artificial radiation. Radiation's nature is energetic particles and/or electromagnetic waves. The damage to tissue from ionizing radiation is being studied decades ago. In contrast, concerns, about the potential health risk associated with unprecedented exposure to non-ionizing radiation, emerge nowadays. Scientists expect objective results to be revealed after few decades of extended use of many low frequency devices or equipment, as well as wireless net and mobile phones. This paper reviews the sources and the most recent results of the effects of radiation, focusing however on the non-ionizing part and, especially, the radiation from radio waves and mobile phones. [ABSTRACT FROM AUTHOR]

The aim of this work was to prepare composite ZnCdSeS quantum dot (QD) flexible films and to examine their optical properties under ultraviolet excitation. PMMA/QD ZnCdSeS composite films, with emission covering the visual spectrum (480–630 nm) were prepared with concentrations 10 mg/mL and 20 mg/mL by homogenously diluting dry powder QD samples in toluene and subsequently mixing with a PMMA/MMA polymer solution to the final ZnCdSeS/Toluene mixture. Scanning electron microscopy (SEM) images of the produced films were obtained. The ZnCdSeS films were excited by ultraviolet light of varying intensities and the spectral matching with various optical detectors was estimated. [ABSTRACT FROM AUTHOR]