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Einige Forscher veröffentlichten Berichte, dass kurzwelliges ultraviolettes Licht im Spektralbereich von 200–230 nm (Far-UVC) Krankheitserreger inaktiviert, ohne dabei menschlichen Zellen zu schaden, was für viele Anwendungen sehr hilfreich sein könnte. Die 254 nm Emission von Niederdruck-Quecksilberdampflampen ist bekannt für ihre antibakterielle Wirkung, allerdings ist diese Art der Bestrahlung auch für menschliche Zellen schädlich.
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Hintergrund: Die anhaltende Coronavirus-Pandemie erfordert neue Desinfektionsansätze, besonders für Viren in der Luft. Radiation disinfection, far-UVC, excimer lamp, 222 nm, coronavirus, influenza virus Therefore, this is not a short-term solution for the current pandemic, but may be suitable for future technological approaches for decontamination in rooms in the presence of people or for antisepsis. Additionally, far-UVC sources are unavailable in larger quantities. Investigations with high far-UVC doses over a longer period of time have not yet been carried out, and there is no positive study on the impact of this radiation on human eyes. A dose of 100 mJ/cm 2 reduces all pathogens by several orders of magnitude without harming human cells, if optical filters block emissions above 230 nm.Ĭonclusion: The approach is very promising, especially for temporary applications, but the data is still sparse. The average necessary log-reduction doses are 1.3 times higher than with 254 nm irradiation. Far-UVC radiation, especially the 222 nm emission of KrCl excimer lamps, exhibits strong antimicrobial properties. Results: More than 100 papers on far-UVC disinfection, published within the last 100 years, were found.
Uvc radiation skin#
Observed damage to cells, skin and eyes was collected and presented in standardized form. Methods: A literature search on the impact of far-UVC radiation on pathogens, cells, skin and eyes was performed and median log-reduction doses for different pathogens and wavelengths were calculated. Some researchers published reports that short-wavelength ultraviolet light in the spectral region of 200–230 nm (far-UVC) should inactivate pathogens without harming human cells, which might be very helpful in many applications. The 254 nm emission of low-pressure vacuum lamps is known for its antimicrobial effect, but unfortunately, this radiation is also harmful to human cells. Background: The ongoing coronavirus pandemic requires new disinfection approaches, especially for airborne viruses.