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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 ...
Halogen lamps with fused quartz envelopes are used as inexpensive UV light sources in the near UV range, from 400 to 300 nm, in some scientific instruments. Due to its black-body spectrum a filament light bulb is a very inefficient ultraviolet source, emitting only a fraction of a percent of its energy as UV, as explained by the black body ...
Whether you love it or love to hate it, sunscreen is a critical part of any skin care routine. This multitasking product helps shield your skin from harmful UV rays, fends off nasty sunburns, and ...
Natural light exposure has been associated with faster cognitive processing speeds and enhances working memory capacity. [62] Additionally, UV exposure plays a role in motor learning and object recognition memory. Moderate UV exposure enhances cognitive functioning through a specialized glutamate (GLU) biosynthetic pathway in the brain. [63]
Malley also warns that there are lots of worrisome myths floating around about UV light, like President Trump’s theory that sunlight or ultraviolet light might work to wipe out Covid-19 inside ...
[123] [147] [137] [127] [148] [125] [128] Since sunscreen's active ingredients work preventatively by creating a shielding film on the skin that absorbs, scatters, and reflects light before it can reach the skin, UV filters have been deemed an ideal “first line of defense” against sun damage when exposure can't be avoided.
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