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Kai Song, Madjid Mohseni, Fariborz Taghipour
Ultraviolet (UV) disinfection is an effective technology for the inactivation of pathogens in water and is of growing interest for industrial application. A new UV source - ultraviolet light-emitting diode (UV-LED) - has emerged in the past decade with a number of advantages compared to traditional UV mercury lamps. This promising alternative raises great interest in the research on application of UV-LEDs for water treatment. Studies on UV-LED water disinfection have increased during the past few years. This article presents a comprehensive review of recent studies on UV-LEDs with various wavelengths for the inactivation of different microorganisms...
May 1, 2016: Water Research
Yoshiaki Kitamura, Hiroyuki Mizuguchi, Kentaro Okamoto, Mika Kitayama, Tatsuya Fujii, Akira Fujioka, Toshio Matsushita, Takashi Mukai, Yoshiaki Kubo, Nobuo Kubo, Hiroyuki Fukui, Noriaki Takeda
Conclusion These findings suggest that low dose irradiation with 310 nm NB-UVB specifically suppressed the up-regulation of H1R gene expression without inducing apoptosis and that UVB of shorter or longer wavelength than 310 nm NB-UVB had no such effects. Objective To develop a narrowband-ultraviolet B(NB-UVB) phototherapy for allergic rhinitis, this study investigated the effects of irradiation with NB-UVB at wavelength of 310 nm on phorbol-12-myristate-13-acetate (PMA)-induced up-regulation of histamine H1 receptor (H1R) mRNA in HeLa cells...
2016: Acta Oto-laryngologica
Pedro G Vianna, Charles R Dale, Sarah Simmons, Mark Stibich, Carmelo M Licitra
BACKGROUND: The role of contaminated environments in the spread of hospital-associated infections has been well documented. This study reports the impact of a pulsed xenon ultraviolet no-touch disinfection system on infection rates in a community care facility. METHODS: This study was conducted in a community hospital in Southern Florida. Beginning November 2012, a pulsed xenon ultraviolet disinfection system was implemented as an adjunct to traditional cleaning methods on discharge of select rooms...
March 1, 2016: American Journal of Infection Control
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