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Ultraviolet - Research, Results And Facts |
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Ultraviolet light (UV) with wavelength shorter
than 300 nanometers is extremely effective in killing microorganisms. The
most effective sterilizing range of UV is within the C bandwidth (UVC -
253.7nm). This range - between 200nm and 280nm - is called germicidal UV bandwidth or UVC. UVC has
extremely low penetrating ability and does not penetrate past the dead-cell layers of the skin.
UV will cause eye irritations or burns after
prolonged exposure. Ultraviolet Germicidal Irradiation - UVGI - is a common tool in laboratories and health care facilities and is becoming more and more popular with the general public and HVAC engineers. Interest in UVGI is increasing with the growing pandemic concerns and the opportunity to use germicidal UV for reducing energy and maintenance costs. Previous applications of UVGI have focused mainly on control of tuberculosis transmission, but a wide range of airborne respiratory pathogens are susceptible to deactivation by UVGI. Public Health Reports published an article titled "The Application of
Ultraviolet Germicidal Irradiation to Control Transmission of Airborne
Disease: Bioterrorism Countermeasure". The article is in Volume 118,
Issue Number 2, March/April 2003. In this article, the authors provide an
overview of air disinfection technologies, and an in-depth analysis of
UVGI, its history, applications, and effectiveness. Germicidal UV has been used in water disinfection systems for many years. As stated by the American Water Works Association, "... UV light disinfection process does not use chemicals. Microorganisms, including bacteria, viruses, and algae, are inactivated within seconds of UV light disinfection... Ultraviolet is effective in inactivating Cryptosporidium, while at the same time decreasing chlorinated disinfection by-products... U.S. cities currently using or planning to use UV light water disinfection include Seattle, WA, New York City, Central Lake County, IL, Albany, NY, Tempe, AZ ..." The UV topics below offer detailed information on the nature of ultraviolet light, science research, facts and conclusions for UV effectiveness. Most importantly, artificially produced UV light by germicidal UV lamps can be utilized to improve the indoor air quality and introduce a healthier environment to live, work or study. The science behind the UV light Indoor Air Quality and people's health Indoor Air Pollution - air pollutants Ultraviolet Lighting During Orthopedic Surgery and the Rate of Infection UV Dosage - Ultraviolet sterilization dosage for mold, viruses, bacteria, protozoa and yeast UV Lamps - Artificial UV Production UV Water Purification Applications UV Definitions and UV Terminology |
Ultraviolet (UV) DisinfectionThe UV light
disinfection process does not use chemicals.
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