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Effects of Radiation

Effects of Radiation. Effects of Radiation Cells of mammals 70-85% water, 10-20% proteins, 10% carbohydrates Radiation in water produces H 2 O + , H 2 O * and e - : H 2 O + + H 2 O → H 3 O + + OH H 2 O * → H 2 O + + e - or H + OH e - → e - aq. Effects of Radiation

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Effects of Radiation

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  1. Effects of Radiation APHY398C

  2. Effects of Radiation • Cells of mammals • 70-85% water, 10-20% proteins, 10% carbohydrates • Radiation in water produces H2O+, H2O* and e- : • H2O++ H2O → H3O+ + OH • H2O* → H2O+ + e- or H + OH • e- → e-aq APHY398C

  3. Effects of Radiation • Biological Effects • Direct – initial action of radiation (ex. DNA ionization) • Indirect – later chemical actions (ex. OH attacks DNA) • Stochastic – statistical risk (elevated cancer levels) • Deterministic – casual relationship (skin reddening) APHY398C

  4. Effects of Radiation APHY398C

  5. Effects of Radiation • Sources of Human Data • Life span study of survivors at Hiroshima and Nagasaki • X rays used to shrink thymus glands in children 1930-40s • X rays used to treat ringworm of the scalp 1940-50s • Radium dial painters 1920s • Uranium miners • Accidents – bomb test fallout (1954), Chernobyl (1986) APHY398C

  6. Effects of Radiation • Acute radiation syndrome • Delayed effects • Cancer • Shortened Lifespan • Cataracts • Genetic mutations APHY398C

  7. Effects of Radiation APHY398C

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