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Representative TEM micrographs of minipig skin in areas containing hair follicles. (left column of photomicrographs) Sub-micron-sized TiO2; (middle column of photomicrographs) Uncoated nano-sized TiO2; (right column of photomicrographs) Coated nano-sized TiO2 in hair follicle areas. The images in the lower photomicrographs are higher magnification images of the corresponding upper panels.
