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available SEPTEMBER 30, 2020
Covid-19 related
Columbia University
Using the Power of Light: Preventing the Airborne Spread of Coronavirus and Influenza Virus
SCIENTIFIC SUPPORT
Dosage Required
Germicidal Effects
Germicidal Effects
This paper advises the UV dose required to inactivate various pathogens, including bacteria, protozoa, viruses and algae based on the lamp type. Authors: Malyeri A.H., Mohseni M., Cairns B., Bolton, J.R., Chevrefils G., Caron E.
Germicidal Effects
Germicidal Effects
Germicidal Effects
This study discusses the germicidal effects of 222nm (Far-UV) light, which is significantly harmful to bacteria, but demonstrates no harm to human cells. Authors: Manuela Buonanno, Brian Ponnaiya, David Welch, Milda Stanislauskas, Gerhard Randers-Pehrson, Lubomir Smilenov, Franklin D. Lowy, David M. Owens, and David J. Brenner
Human Safety
Germicidal Effects
Human Safety
This study focuses on the human safety in regards to long term exposure of 222nm (Far-UV) light and suggests 222nm FAR-UVC lamp can be safely used on humans. Authors: Nozomi Yamano, Makoto Kunisada, Sachiko Kaidzu, Kazunobu Sugihara, Aiko Nishiaki-Sawada, Hiroyuki Ohashi, Ai Yoshioka, Tatsushi Igarashi, Akihiro Ohira, Masaki Tanito, and Chikako Nishigori
Press Room
Daytona Beach firm hits market with wearable UV device that fends off COVID-19 virus
The company is developing a wearable UV germicide irradiation device using far-UVC technology. The company says the product, dubbed The DEFENDER is designed to eradicate airborne viruses before the pathogens can enter the human body and infect an individual.
UV Light for Sanitization
Light is comprised of different wavelengths, each with their own unique properties. The germicidal properties of ultraviolet (UV) light, part of the non-visible spectrum, can be harnessed to effectively sanitize the air, water and surfaces. At the appropriate wavelength and fluence (dose), exposure to ultraviolet light modifies or destroys the genetic material (DNA and RNA) in viruses, bacteria and mold, preventing replication.
Healthe air and surface sanitizing products employ various combinations of UV light and filtration to inactivate pathogens, including Far UV-C (200-230nm), UV-C (231-280nm) and UV-A (365nm
UV Effectiveness and Safety
The effectiveness of UV on inactivating or destroying microbes depends on the microorganism’s structure, size and resilience, in addition to the UV exposure parameters including duration of exposure, wavelength and intensity (see SCIENTIFIC SUPPORT).
UV-C (231-280nm) must be shielded from humans as it poses a carcinogenic safety risk. Continuous low doses of Far UV-C (200-230nm) have been studied and no human effects reported (see SCIENTIFIC SUPPORT).
GERMICIDAL EFFICACY AND MAMMALIAN SKIN SAFETY OF 222-NM UV LIGHT
Authors: Manuela Buonanno, Brian Ponnaiya, David Welch, Milda Stanislauskas, Gerhard Randers-Pehrson, Lubomir Smilenov, Franklin D. Lowy, David M. Owens, and David J. Brenner
LONG TERM EFFECTS OF 222 NM RADIATION C STERILIZING LAMPS ON MICE SUSCEPTIBLE TO ULTRAVIOLET LIGHT
Authors: Nozomi Yamano, Makoto Kunisada, Sachiko Kaidzu, Kazunobu Sugihara, Aiko Nishiaki-Sawada, Hiroyuki Ohashi, Ai Yoshioka, Tatsushi Igarashi, Akihiro Ohira, Masaki Tanito, and Chikako Nishigori
FLUENCE (UV DOSE) REQUIRED TO ACHIEVE INCREMENTAL LOG INACTIVATION OF BACTERIA, PROTOZOA, VIRUSES
Authors: Malyeri A.H., Mohseni M., Cairns B., Bolton, J.R., Chevrefils G., Caron E.