what is the meaning of uv sterilizer?
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A UV sterilizer is used to control infections by stopping the spread of microorganisms from one fish/coral/invertebrate to another through the water. It is also used in pond applications to control free-floating algae. When operated correctly, free-floating microorganisms will be killed by the UV light.
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Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum between x rays and visible light, i.e., between 40 and 400 nm (30–3 eV). ... Germicidal lamps are designed to emit UVC radiation because of its ability to kill bacteria.
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Ultraviolet Radiation Definition. Ultraviolet radiation is electromagnetic radiation or light having a wavelength greater than 100 nm but less than 400 nm. ... He called the invisible light "oxidizing rays", referring to the chemical activity of the radiation.
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['Sterilization chamber pressure is reduced to a very high vacuum.', 'Liquid H2O2 is converted into vapor.', 'Under high vacuum, vapors fill the chamber, contacting all surfaces.', 'After sterilization, the vapor is vacuumed from the chamber and converted into water and oxygen.']
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Ozone is a particularly effective absorber of UV radiation. As the ozone layer gets thinner, the protective filter activity of the atmosphere is progressively reduced. Consequently, the people and the environment are exposed to higher levels of UV radiation, especially UVB.
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Ultraviolet radiation (UVR) is defined as the portion of the electromagnetic spectrum between 100 nanometers (nm) and 400nm. ... UVA - Ultraviolet radiation in the range 315nm to 400nm is thought to contribute to premature aging and wrinkling of the skin and has recently been implicated as a cause of skin cancer.
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UV processing foregoes the heating of traditional pasteurization. Instead of heat, a UV light is used to kill any harmful bacteria. This non-thermal process is approved by the FDA and has long been used for treating bottled drinking water.
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Sterilization is defined as the destruction of all microbial life, whereas disinfection involves the use of a chemical sterilant/agent to eliminate virtually all recognized pathogenic microorganisms, but not necessarily all types of microorganisms (e.g., bacterial endospores) present on inanimate objects.
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A UV water purifier exposes living organisms, such as bacteria, viruses, or cysts (like Cryptosporidium and Giardia) to a germicidal ultraviolet wavelength. ... The ultraviolet light prevents bacteria from spreading disease through drinking water.
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Radiation is used to sterilize medical instruments by first sealing a clean, but not bacteria-free, instrument in an air-tight bag. The bag and instrument are then placed in a very large field of radiation that can penetrate the bag—for example, gamma radiation, x rays, or high-energy electrons.
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As a water treatment technique, UV is known to be an effective disinfectant due to its strong germicidal (inactivating) ability. UV disinfects water containing bacteria and viruses and can be effective against protozoans like, Giardia lamblia cysts or Cryptosporidium oocysts.
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7 Decontamination: the total process used to remove organic matter and micro- organisms from an item and render it safe for use. There are three levels of decontamination: cleaning, disinfection and sterilization. 2.1.
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High intensity, broad-spectrum UV systems (also known as medium-pressure UV) reduce both free chlorine and combined chlorine compounds (chloramines) into easily removed byproducts. Between the wavelengths 180 and 400 nm, UV light produces photochemical reactions that dissociate free chlorine to form hydrochloric acid.
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Sterilization, which is any process, physical or chemical, that destroys all forms of life, is used especially to destroy microorganisms, spores, and viruses. Precisely defined, sterilization is the complete destruction of all microorganisms by a suitable chemical agent or by heat, either wet steam…
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UV resistance is defined as the ability of a material to resist ultra violet (UV) light or sunlight. UV light, or sunlight, will cause non-resistant materials and surfaces to fade or discolor.
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The FDA definition of high-level disinfection is a sterilant used for a shorter contact time to achieve a 6-log10 kill of an appropriate Mycobacteriumspecies. Cleaning followed by high-level disinfection should eliminate enough pathogens to prevent transmission of infection.
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Sterilization involving lower temperature and high-pressure of water (steam) is known as Moist Heat Sterilization. Sterilization involving the dry air of higher temperature and for the longer time is known as Dry Heat Sterilization. As the name says, it needs steam and water. ... Moist heat sterilization takes less time.