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The curve for E. coli is given in the figure, with the most effective UV light having a wavelength of 265 nm. This applies to most bacteria and does not change significantly for other microbes. Dosages for a 90% kill rate of most bacteria and viruses range between 2,000 and 8,000 μJ/cm 2.
In this application, the light produced by the lamp is usually filtered to remove as much visible light as possible, leaving just the UV light. Germicidal lamps are also used in waste water treatment in order to kill microorganisms. An EPROM. The small quartz window allows UV light to enter during erasure.
The location of 'far-UVC' radiation (200-235 nm) in the electromagnetic spectrum. Far-UVC is a type of ultraviolet germicidal irradiation being studied and commercially developed for its combination of pathogen inactivation properties and reduced negative effects on human health when used within exposure guidelines.
In other words, the right kind of UV rays have been proven to kill a variety of pathogens, including bacteria, viruses, and other coronaviruses, like Middle Eastern respiratory syndrome ...
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Ultraviolet (UV) is normally hazardous both to microbes and humans. He discovered that a far-UVC band of light within a confined wavelength range around 200 nanometers was cytotoxic to bacteria but appeared, unlike wide band UV, to be absorbed by, and not to penetrate beyond, the outer dead layers of skin, and not to damage eyes. He is ...
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