Use of titanium dioxide (TiO2) photocatalysts as alternative means for Listeria monocytogenes biofilm disinfection in food processing

dc.contributor.author	Chorianopoulos, NG	en
dc.contributor.author	Tsoukleris, DS	en
dc.contributor.author	Panagou, EZ	en
dc.contributor.author	Falaras, P	en
dc.contributor.author	Nychas, G-JE	en
dc.date.accessioned	2014-06-06T06:51:31Z
dc.date.available	2014-06-06T06:51:31Z
dc.date.issued	2011	en
dc.identifier.issn	07400020	en
dc.identifier.uri	http://dx.doi.org/10.1016/j.fm.2010.07.025	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5550
dc.subject	Biofilm	en
dc.subject	Listeria monocytogenes	en
dc.subject	Nanoparticles	en
dc.subject	Photocatalysis	en
dc.subject	Titanium dioxide (TiO2)	en
dc.subject	UV-irradiation	en
dc.subject.other	Bacteria (microorganisms)	en
dc.subject.other	Listeria monocytogenes	en
dc.subject.other	photosensitizing agent	en
dc.subject.other	stainless steel	en
dc.subject.other	titanium	en
dc.subject.other	titanium dioxide	en
dc.subject.other	article	en
dc.subject.other	bacterial count	en
dc.subject.other	biofilm	en
dc.subject.other	disinfection	en
dc.subject.other	drug effect	en
dc.subject.other	equipment	en
dc.subject.other	food contamination	en
dc.subject.other	food control	en
dc.subject.other	food industry	en
dc.subject.other	food safety	en
dc.subject.other	growth, development and aging	en
dc.subject.other	Listeria monocytogenes	en
dc.subject.other	Biofilms	en
dc.subject.other	Colony Count, Microbial	en
dc.subject.other	Disinfection	en
dc.subject.other	Equipment Contamination	en
dc.subject.other	Food Contamination	en
dc.subject.other	Food Microbiology	en
dc.subject.other	Food Safety	en
dc.subject.other	Food-Processing Industry	en
dc.subject.other	Listeria monocytogenes	en
dc.subject.other	Photosensitizing Agents	en
dc.subject.other	Stainless Steel	en
dc.subject.other	Titanium	en
dc.title	Use of titanium dioxide (TiO2) photocatalysts as alternative means for Listeria monocytogenes biofilm disinfection in food processing	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.fm.2010.07.025	en
heal.publicationDate	2011	en
heal.abstract	The aim of this work was to study the photocatalytic activity of titanium dioxide (TiO2) against Listeria monocytogenes bacterial biofilm. Different TiO2 nanostructured thin films were deposited on surfaces such as stainless steel and glass using the doctor-blade technique. All the surfaces were placed in test tubes containing Brain Heart (BH) broth and inoculated with L. monocytogenes. Test tubes were then incubated for 10 days at 16°C in order to allow biofilm development. After biofilm formation, the surfaces were illuminated by ultraviolet A light (UVA; wavelength of 315-400nm). The quantification of biofilms was performed using the bead vortexing method, followed by agar plating and/or by conductance measurements (via the metabolic activity of biofilm cells). The presence of the TiO2 nanoparticles resulted in a fastest log-reduction of bacterial biofilm compared to the control test. The biofilm of L. monocytogenes for the glass nanoparticle 1 (glass surface modified by 16% w/v TiO2) was found to have decreased by 3log CFU/cm2 after 90min irradiation by UVA. The use of TiO2 nanostructured photocatalysts as alternative means of disinfecting contaminated surfaces presents an intriguing case, which by further development may provide potent disinfecting solutions. Surface modification using nanostructured titania and UV irradiation is an innovative combination to enhance food safety and economizing time and money. © 2010 Elsevier Ltd.	en
heal.journalName	Food Microbiology	en
dc.identifier.issue	1	en
dc.identifier.volume	28	en
dc.identifier.doi	10.1016/j.fm.2010.07.025	en
dc.identifier.spage	164	en
dc.identifier.epage	170	en