Essay On UV Radiation

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Ultraviolet radiation - (UV) Ultraviolet (UV) radiation is an invisible electromagnetic radiation with wavelength from 10 to 400 nanometers (nm) which are just shorter than those of ordinary, visible violet light but longer than x-rays. Naturally, about 10% of the sun light output is in the form of UV radiation which is also artificially produced by several sources, such as during electric (arc) welding, mercury-vapor lamps, tanning booths and halogen lights. Depending on the wavelength range of the emitted UV radiation, unique hazards may be produced especially by long-wavelength UV radiation that passes through the ozone hole whereas the familiar effects of over-exposure to UV light may cause suntan, freckling and sunburn. However, higher…show more content…
The use of UV technology in aquariums as well as in aquatic laboratories is to ensure that their water remains always pathogen free especially the UV disinfection systems are chemical-free and so its use limits the chance of introducing harmful substances such as chlorine into the environment. In general, the ultraviolet disinfection is preferred approach disinfection method since it does not alter water chemically; nothing is being added except energy that penetrates the outer cell membrane, passes through the cell body and disrupts its nucleic acid, thereby preventing them from replicating. For proper selection of UV sterilizers in aquaculture, key parameters need to be identified and considered. The target pathogen as well as the log inactivation should be…show more content…
That is why the dosage of UV radiation needed to kill at least 90% (log 1) of the population present in water is widely accepted especially this dose is well known for many of target

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