Germicidal UV Sources and Systems †
نویسندگان
چکیده
منابع مشابه
Non-UV germicidal activity of fresh TiO2 and Ag/TiO2.
Fresh TiO2 was found to possess a strong germicidal activity even without UV irradiation. Live Yeast (Saccharomyces cerevisiae) cells in contact with fresh TiO2 were found deformed and dead after 15 min contact. The cause of germicidal activity was discussed from the observed cell deformation, lysis and increased absorption at 1680 cm(-1) in FT-IR spectra of the affected cells, which proved the...
متن کاملComparison of UV-Induced Inactivation and RNA Damage in MS2 Phage across the Germicidal UV Spectrum.
Polychromatic UV irradiation is a common method of pathogen inactivation in the water treatment industry. To improve its disinfection efficacy, more information on the mechanisms of UV inactivation on microorganisms at wavelengths throughout the germicidal UV spectrum, particularly at below 240 nm, is necessary. This work examined UV inactivation of bacteriophage MS2, a common surrogate for ent...
متن کاملSurface disinfection by exposure to germicidal UV light.
The present study was aimed to design a simple model to check efficacy of germicidal UV tube, to standardise the position, distance and time for UV light and also to find out its efficacy against medically important bacteria, the bacterial spores and fungi. The microbial cultures tested included gram positive and gram negative bacteria, bacterial spores and fungal spores. The microbes streaked ...
متن کاملDemonstration and evaluation of germicidal UV-LEDs for point-of-use water disinfection.
Ultraviolet (UV) irradiation is a common disinfection option for water treatment in the developed world. There are a few systems installed in developing countries for point-of-use treatment, but the low-pressure mercury lamps currently used as the UV irradiation source have a number of sustainability issues including a fragile envelope, a lifetime of approximately one year, and they contain mer...
متن کاملGermicidal Efficacy and Mammalian Skin Safety of 222-nm UV Light.
We have previously shown that 207-nm ultraviolet (UV) light has similar antimicrobial properties as typical germicidal UV light (254 nm), but without inducing mammalian skin damage. The biophysical rationale is based on the limited penetration distance of 207-nm light in biological samples (e.g. stratum corneum) compared with that of 254-nm light. Here we extended our previous studies to 222-nm...
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ژورنال
عنوان ژورنال: Photochemistry and Photobiology
سال: 2021
ISSN: 0031-8655,1751-1097
DOI: 10.1111/php.13387