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07.03.2019 · • Radiation can cause biological damages on cells either indirect or direct action. If radiation falls on a human body, it produces moving electrons. The electrons cause further ionization, excitation, resulting in chemical and molecular changes. Radiation can also pruduce free radicals, which are unpaired electrons that are chemically reactive.

USACE BASIC RADIATION PROTECTION TRAINING Overview Stochastic vs. Non-stochastic Effects Dose Response Curves Mechanisms for Biological Damage Direct vs. Indirect ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - …

Health Risks from Exposure to Low Levels of Ionizing Radiation: BEIR VII. NAS, 2006. UNSCEAR. Effects of ionizing radiation, 2006. ICRP-103, 2007 Recommendations and Associated Annex on Biology and Epidemiology. Dauer LT, et al. Evaluation of updated research on the health effects and risks associated with low dose ionizing radiation.

1. radioactive decay and ionization as it relates to effects of radiation. 2. that the primary target for the induction of biological ...

BIOLOGICAL EFFECTS OF IONIZING RADIATION D. PUNITHA B. SC MIT, SRI SATHYA SAI MEDICAL COLLEGE AND RESEARCH INSTITUTE. GUIDED BY, PROF.DR.

BIOLOGICAL EFFECTS OF IONIZING RADIATION . Ionizing radiation in very high levels is known to increase the incidence of cancer, birth anomalies, erythema, and other problems. In low levels, these effects are either very, very small compared to natural incidences or non-existent depending on the biological model used for estimating the potential risk.

Four things can happen when radiation enters a cell: 1. The radiation may pass through without any damage occurring; 2. The radiation may damage the cell, but the cell repairs the damage; 3. The radiation may damage the cell…the damage is not repaired…and the cell replicates itself in the damaged form; 4. The cell dies.

Biological Effects of Radiation - Biological Effects of Radiation Hall, Radiobiology for the Radiologist Cember, Ch. 7 Radiobiology The study of the action of ionizing radiations on living things. | PowerPoint PPT presentation | free to view

Basics of Biological Effects of Ionizing Radiation. Lecture. Module 1. IAEA. Biological effects of radiation. Ionizing radiations have many beneficial ...

Biological Effect Caused by Radiation. The effect which occur in human body by the exposure from. Ionizing Radiation. When the Radiation is ...

Cumulative CT-related low-dose IR has been correlated with detrimental biological effects such as DNA damage, bystander effects, tissue injury, and, in some ...

Biological Effects of Ionizing Radiation. Terminology. Acute vs. Chronic Exposure; Direct vs. Indirect Action; Prompt vs. Delayed Effects; Stochastic vs.

Although we tend to think of biological effects in terms of the effect of radiation on living cells, in actuality, ionizing radiation, by definition, ...

Jan 27, 1987 · 5-6 RSSC BIOLOGICAL EFFECTS OF IONIZING RADIATION 08/11 organs, are of moderately high sensitivity; in terms of injury from large doses of whole-body external radiation, the epithelial cells which line the gastrointestinal tract are often of particular importance. Cells of low sensitivity include muscle and nerve,

Presentation on theme: "Module 4 Biological Effects of Ionizing Radiation"— Presentation transcript: 1 Module 4 Biological Effects of Ionizing Radiation.

19.01.2016 · The biological effects of ionizing radiation by Marilena Streit-Bianchi. The biological effects of ionizing radiation. CERN Academic Training Lectures 27 th , 28 th and 29 th May 2008. CERN Academic Training 27-30 May 2008. The biological effects of ionizing radiation. First lecture - PowerPoint PPT Presentation

Biological Effects of Radiation - Biological Effects of Radiation Hall, Radiobiology for the Radiologist Cember, Ch. 7 Radiobiology The study of the action of ionizing radiations on living things. | PowerPoint PPT presentation | free to view

Incident Particle or Photon Ionization of Water Molecule Dissociation of Water Molecule Free Radicals Produced Chemical Changes Possible Biological Effects Module #4 Indirect Action H2O H2O+ + e- H2O+ H+ + OH H2O + e - H2O- H2O- H + OH- Radiation ionizes a water molecule The positive ion dissociates The electron attaches to a neutral water molecule The negative ion then dissociates Module #4 Indirect Action (cont.) H + H H2 OH + OH H2O2 H + O2 HO2 HO2 + H H2O2 The H ...

biological effects of radiation ionizing radiations have many beneficial applications, but they also may have detrimental consequences for human health and for environment since x-rays were discovered in 1895, it was quickly realized that they may be harmful to protect people and the environment it is essential to understand how …