UV-RADIATION UV-Radiation

UV-Radiation

All the energy that travel at the speed of light collectivelly called electromagnetic radiation or "light." Different types of light different in wavelength, frequency and energy, higher energy waves have higher frequencies and shorter wavelengths. Pigments in the retina of our eyes to absorb the wavelength of light between 400nm-700nm, collectively referred to as "visible light". "Nm''yavlyaetsya nanometer is equal to one billionth, or 10E-9 meters.

Health consequences of UV-B light

Genetic damage to DNA absorbs UV-B light and the absorbed energy can break bonds in DNA. Most of the damage of DNA repair proteins are present in the cell nucleus, but no repair genetic damage to DNA can lead to skin cancer. At one method that scientists use to analyze the number of "genetically-damaging UV-B is subjected to DNA samples to light, and then count the number of breaks in DNA. To use the example of John Regan" at Florida Institute of Technology have used human DNA, to find that the genetically significant doses of solar radiation can penetrate up to 9 feet in non-turbulant ocean water.

Cancer risk communication principle of developing skin cancer is a fair-skinned people. 1% decrease in the ozone layer will lead to an estimated 2% increase in UV-B radiation, according to estimates, this will lead to a 4% increase in basal cell carcinoma and 6% increase in squamous cell carcinoma [Graedel and Crutzen] .. 90% of skin carcinomas belong to the UV-B exposure [Wayne], and the chemical mechanism by which it causes skin cancer has been identified [Tevini]. Carcinoma of the above is relatively easy to treat, if detected in time, and rarely fatal. But much more dangerous malignant melanoma is not well understood. There seems to be correlation between short, high intensity UV-and the possible appearance (as long as 10-dose within 20 ...