Article
Revisiting the photochemistry of solar UVA in human skin
5 Sept 2006
Abstract excerpt
The UV portion of sunlight has traditionally been divided into three wavelength spectra: UVC (290 nm and below), UVB (290–320 nm), and UVA (320 nm-visible). The boundaries between these three ranges are somewhat arbitrary, but the divisions have been convenient for categorizing the response of human skin to solar exposure. Wavelengths <290 nm (UVC) are blocked by stratospheric ozone but include the peak...
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