The research team placed the mice under different ultraviolet radiation. One group is placed under a 222nm germicidal lamp, and the other groups are placed under a UVB light source of 280-315nm. It was found that the mice irradiated with UVB light source suffered from skin cancer and showed adverse reactions, while the mice irradiated with 222nm UV lamp did not suffer from skin cancer. In addition, they also studied and observed its effect on the eyes of mice, and no abnormalities were found even under the microscope.
Therefore, the research team came to a conclusion that since deep ultraviolet light with a wavelength of 222nm can only reach the outermost layer of the skin-the stratum corneum, it will not damage the DNA of skin cells and ultimately has no adverse effects.
Studies have shown that deep ultraviolet radiation with a wavelength of 222 nm has a strong disinfection ability and is harmless to human skin. Therefore, this technology is expected to be widely used in the field of sterilization and disinfection.
It is reported that the research results have been published on March 29 in the international journal “Photochemistry & Photobiology” (Photochemistry & Photobiology), and will be held in Chicago on June 28 at the 2020 biennial meeting of the American Society of Photobiology. (ASP) released.