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Types of Radiation 1. Ionizing Radiation X-rays and gamma rays Disrupts DNA and RNA Used for Sterilization Procedures 2. Non-Ionizing Radiation UV light.

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Presentation on theme: "Types of Radiation 1. Ionizing Radiation X-rays and gamma rays Disrupts DNA and RNA Used for Sterilization Procedures 2. Non-Ionizing Radiation UV light."— Presentation transcript:

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2 Types of Radiation 1. Ionizing Radiation X-rays and gamma rays Disrupts DNA and RNA Used for Sterilization Procedures 2. Non-Ionizing Radiation UV light Does not penetrate plastic, glass and proteinaceous matter (very well) Not used for sterilization procedures, but is used to reduce microbial populations lethal mutations – Thymine Dimers

3 Thymine Dimers A T G C A T G T T C G A T G C A T A C G T A C A A G C T A C G T

4 Photoreactivation Enzymes activated by exposure to visible light can snip out the damaged DNA and replace it with the normal DNA

5 UV Radiation from the Sun 1. UV A 320 nm nm 2. UV B 280 nm nm 3. UV C 100 nm nm Most is screened out by the ozone


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