148645 20250120165543.0 doi 10.1016/j.fm.2014.08.011 sideral 87949 ART-2015-87949 eng Gayán, E. (orcid)0000-0002-5895-2157 Environmental and biological factors influencing the UV-C resistance of Listeria monocytogenes 2015 In this investigation, the effect of microbiological factors (strain, growth phase, exposition to sublethal stresses, and photorepair ability), treatment medium characteristics (pH, water activity, and absorption coefficient), and processing parameters (dose and temperature) on the UV resistance of Listeria monocytogenes was studied. The dose to inactivate 99.99% of the initial population of the five strains tested ranged from 21.84 J/mL (STCC 5672) to 14.66 J/mL (STCC 4031). The UV inactivation of the most resistant strain did not change in different growth phases and after exposure to sublethal heat, acid, basic, and oxidative shocks. The pH and water activity of the treatment medium did not affect the UV resistance of L. monocytogenes, whereas the inactivation rate decreased exponentially with the absorption coefficient. The lethal effect of UV radiation increased synergistically with temperature between 50 and 60 °C (UV-H treatment). A UV-H treatment of 27.10 J/mL at 55 °C reached 2.99 and 3.69 Log10 inactivation cycles of L. monocytogenes in orange juice and vegetable broth, and more than 5 Log10 cycles in apple juice and chicken broth. This synergistic effect opens the possibility to design UV combined processes for the pasteurization of liquid foods with high absorptivity. Access copy available to the general public Unrestricted info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.682 2015 BIOTECHNOLOGY & APPLIED MICROBIOLOGY 37 / 161 = 0.23 2015 Q1 T1 FOOD SCIENCE & TECHNOLOGY 11 / 125 = 0.088 2015 Q1 T1 MICROBIOLOGY 34 / 123 = 0.276 2015 Q2 T1 1.705 2015 Microbiology 2015 Q1 Food Science 2015 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Serrano, M. J. Universidad de Zaragoza (orcid)0000-0003-3850-9833 Pagán, R. Universidad de Zaragoza (orcid)0000-0002-0238-6328 Álvarez, I. Condón, S. Universidad de Zaragoza (orcid)0000-0002-1902-0648 2008 780 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Tecnología de Alimentos 46 (2015), 246-253 Food microbiol. FOOD MICROBIOLOGY 0740-0020 478232 http://zaguan.unizar.es/record/148645/files/texto_completo.pdf Postprint 462931 http://zaguan.unizar.es/record/148645/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:148645 articulos driver 2025-01-20-14:54:47 ARTICLE