title: Effect of UVA irradiance on photocatalytic and UVA inactivation of Bacillus cereus spores.
abstract: The current study is the first to delineate the contribution of photocatalysis to inactivation of Bacillus cereus endospores on dry surfaces over a broad range (0-153W/m(2)) of UVA irradiance. Inactivation of spores at low UVA irradiance (30W/m(2)) was primarily due to photocatalysis, whereas at higher UVA irradiance inactivation was primarily due to UV alone. A linear relationship between UVA irradiance and the rate of spore inactivation was observed in the absence of photocatalyst. The rate of photocatalytic inactivation was non-linear with respect to UVA irradiance, exhibiting a maximum at 30W/m(2).
authors.affiliation: Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL, USA. jue.zhao@aecom.com
authors.forename: Jue
authors.initials: J
authors.lastname: Zhao
authors.forename: Vijay
authors.initials: V
authors.lastname: Krishna
authors.forename: Bin
authors.initials: B
authors.lastname: Hua
authors.forename: Brij
authors.initials: B
authors.lastname: Moudgil
authors.forename: Ben
authors.initials: B
authors.lastname: Koopman
mesh_terms: D001409:Bacillus cereus / Q000166:cytology* / Q000187:drug effects / Q000502:physiology / Q000528:radiation effects*; D002384:Catalysis / Q000528:radiation effects; D005516:Food Microbiology; D008567:Membranes, Artificial; D050296:Microbial Viability / Q000187:drug effects / Q000528:radiation effects*; D055668:Photochemical Processes / Q000528:radiation effects*; D013171:Spores, Bacterial / Q000737:chemistry / Q000187:drug effects / Q000528:radiation effects; D013499:Surface Properties; D014025:Titanium / Q000494:pharmacology; D014466:Ultraviolet Rays
chemical_list: D008567:Membranes, Artificial; C009495:titanium dioxide; D014025:Titanium