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UVA is the safest of the three spectra of UV light, although high exposure to UVA has been linked to the development of skin cancer in humans. The relatively low energy of UVA light does not cause sunburn. It can damage collagen fibers, so may accelerate skin aging and cause wrinkles. It can also degrade vitamin A in the skin.
UVC is the highest-energy, most-dangerous type of ultraviolet radiation, and causes adverse effects that can variously be mutagenic or carcinogenic. [68] In the past, UVA was considered not harmful or less harmful than UVB, but today it is known to contribute to skin cancer via indirect DNA damage (free radicals such as reactive oxygen species ...
The UVB to UVA ratio percentage is considered a technologically outdated form of measuring a lamp's overall UV output and Wolff "Metric" now lists actual UVA, UVB and total UV flux powers. This is the best way of measuring a low-pressure and high-pressure lamp.
Tennessee, Kentucky, West Virginia and the Carolinas all have areas with the potential for large fire events, Pohl, of Headwaters Economics, said. ... especially the dangerous embers that can ...
The utilization of UVGI for air disinfection began in earnest in the mid-1930s. William F. Wells demonstrated in 1935 that airborne infectious organisms, specifically aerosolized B. coli exposed to 254 nm UV, could be rapidly inactivated. [46]
A rescue dog is safe and warm after being abandoned in Virginia's recent cold snap. On Friday, Jan. 17, Richmond Animal Care and Control (RACC) shared on social media that the pup — a black male ...
"A Rape on Campus" is a retracted, defamatory Rolling Stone magazine article [2] [3] [4] written by Sabrina Erdely and originally published on November 19, 2014, that describes a purported group sexual assault at the University of Virginia (UVA) in Charlottesville, Virginia.
The Most Dangerous Beaches In the World Buena Vista Images ... Virginia Beach, Virginia. Believe it or not, the predators that are most commonly found on the shores of Virginia beach are wild ...