Natural Sources of Ionizing Radiation
نویسندگان
چکیده
Many of our students seem to have well-defined but not necessarily well-founded opinions on the biological effects of ionizing radiation. During discussions of nuclear transformations in introductory chemistry and physics courses we might be able to help these students better understand the magnitude of these effects, and perhaps sort out the plethora of units with which radiation measurements are expressed.
منابع مشابه
Detection of ionizing radiation emitted from the cesium-137 and cobalt-60 sources using electrochemical superoxide anion sensor in the aqueous medium
Widespread use of ionizing radiation in medicine, industry, agriculture, education and research, the increasing production of nuclear waste and nuclear incidents, has exposed humans and organisms to this radiation. Despite the benefits of ionizing radiation, these beams can cause serious damage to living systems. Hence, the need for radiation protection actions requires accurate, fast, inexpens...
متن کاملNatural Radioprotective Agents against Ionizing Radiation – An Overview
Ionizing radiations are one of the predominant exogenous factors that have deleterious consequences to human life The biological effects of the radiation cause damages to DNAs, lipids and proteins. Exposure to high amounts of ionizing radiation causes damages to the hematopoietic, gastrointestinal or central nervous systems, depending on radiation dose. Hence, there is an urgent need to prevent...
متن کاملA Glance at the Errors of Some Studies on the Health Effects of High Background Natural Radiation Areas
There is no place on the Earth, the planet we live on, where the natural background radiation level is zero. Since the birth and even in our fetal stage, we have been exposed to different sources of natural radiation. Life, in fact, evolved in a radiation environment that was much more harsh than today. Earth serves as a source of terrestrial radiation. Uranium, thorium, and radium are among th...
متن کاملBridging Radiation Policy and Science
Natural and man-made sources of ionizing radiation have made and continue to make invaluable contributions to society and to individuals. Radiation is part of nature. Natural sources of radiation including radon gas from the earth’s crust and cosmic radiation from outer space account for 80-90 percent of the radiation to which the public is exposed every year. Man-made sources provide hundreds ...
متن کاملPublic exposure to natural radiation sources (Ramsar Case Study)
Introduction: Human beings are naturally exposed to ionizing radiation in any environment. There are two main contributors to radiation exposures from natural sources: cosmic rays, Cosmo genic radionuclides, and radioactive nuclides that originated in the earth's crust. According to the latest data provided by the United Nations Scientific Committee on the Effects of Atomic Rad...
متن کاملSynergic Effect of TC99-m Gamma Radiation and Non-ionizing Radiation of Wi-Fi on Count, Morphology and Motility of Sperms in Rats: An Experimental Study
Background: Given the effects of ionizing radiation on biological tissues and their irreversible tissue damage, this project aimed to determine the synergic effect of TC99-m gamma radiation and non-ionizing radiation of Wi-Fi on sperm characteristics in rats. Materials and Methods: Sixty adult male rats, weighing 250-200 g randomly divided into four groups (three experimental groups and one co...
متن کامل