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A low-pressure mercury-vapor discharge tube floods the inside of a biosafety cabinet with shortwave UV light when not in use, killing microbes on irradiated surfaces. Ultraviolet germicidal irradiation (UVGI) is a disinfection technique employing ultraviolet (UV) light, particularly UV-C (180–280 nm), to kill or inactivate microorganisms ...
UV-B, predominantly responsible for the harmful effects of sunlight, poses the highest risk for erythema, photokeratitis, sunburn and skin cancer. [14] [15] [16] While longer UV-C wavelengths and UV-A can also cause damage, their effects are less severe than UV-B. In contrast, far-UVC has shown remarkably different results.
A germicidal lamp (also known as disinfection lamp or sterilizer lamp) is an electric light that produces ultraviolet C (UVC) light. This short-wave ultraviolet light disrupts DNA base pairing , causing formation of pyrimidine dimers , and leads to the inactivation of bacteria , viruses , and protozoans .
Light therapy is a safe, easy way to kill cancer and treat other diseases, but it's normally limited by its nature to illnesses that are skin-deep. Washington University researchers aren't daunted ...
Among related approaches, the psoralen derivative Amotosalen, activated by long-wavelength UV light, is used in Europe for disinfection of plasma and platelets. [105] However, this represents a photochemical reaction between the psoralen nucleus and viral nucleic acids, rather than a purely photodynamic effect.
Blood irradiation therapy is an alternative medical procedure in which the blood is exposed to low-level light (often laser light) for therapeutic reasons. [1] The practice was originally developed in the United States, [1] but most recent research on it has been conducted in Germany (by UV lamps) and in Russia (in all variants).
Extremely hot stars (such as O- and B-type) emit proportionally more UV radiation than the Sun. Sunlight in space at the top of Earth's atmosphere (see solar constant) is composed of about 50% infrared light, 40% visible light, and 10% ultraviolet light, for a total intensity of about 1400 W/m 2 in vacuum.
HealthinationWhen + How to Use Hand Sanitizer Properly for COVID-19 ProtectionJust rubbing it into your palms? “UV is a very effective tool in the toolbox, and one of the multiple barriers to ...
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