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7 mar 2019 · Ionizing radiation has enough energy to remove electrons from atoms, ionizing them. This can cause biological damage by producing free radicals that interact with DNA, RNA, and proteins.
- Biological effects of ionizing radiations | PPT - SlideShare
The document discusses the biological effects of ionizing...
- Biological effects of ionizing radiations | PPT - SlideShare
11 lip 2017 · The document discusses the biological effects of ionizing radiation. It describes the sources of ionizing radiation, both natural and artificial. It explains the properties of different types of ionizing radiation and how they interact with living tissue on an atomic and molecular level.
4 lis 2021 · Ionizing radiation can cause biological damage through direct or indirect action on cells. The effects of radiation exposure depend on factors like total dose, dose rate, and part of body exposed.
Conclusions: implications for low-dose cancer risk. (73) Epidemiological data from studies of human populations exposed to IR provide direct evidence that such exposure is associated with increased risk of cancer, and reason to believe that excess risk is not confined to people exposed to very high radiation doses.
The biological effect of radiations depends on : The type of the radiation. It is greater for radiations that have a high ionization density along the track of particles (linear energy transfert LET). The cell type. It is greater for cells that divide rapidly, cells that undergo DNA recombination and stem cells.
They are all of deterministic type. Among the local effects the most frequent is the radiation induced skin injury. Acute exposure of the whole body is early expressed in the rather general symptoms of the acute radiation syndrome (ARS) or acute radiation disease.
The document summarizes the biological effects of radiation on living beings. It describes two main types of effects: deterministic and stochastic. Deterministic effects increase in severity with dose above a threshold and include skin damage and cataracts.
