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In the past five decades, it has not been publicly reported that there may be a certain relationship between fluctuation of air ions concentration (AIC) and intensity of ultraviolet (UV) irradiations in small chambers. However, our experiments with UV irradiations in small chambers indicate that 254nm UV-C irradiation conduces to high negative AIC (NAIC) and low positive AIC (PAIC) in small chambers,...
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