2026-04-17T06:46:14Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4402952025-03-27T05:03:24Zcom_2072_98col_2072_378192

Bactericidal efficacy of UV activated TiO2 nanoparticles against Gram-positive and Gram-negative bacteria on suspension Eficacia bactericida de nanopartículas de TiO2 activadas por luz UV contra bacterias Gram-positivas y Gram-negativas en suspensión Ripolles-Avila, Carolina Martínez-García, María Hascoët, Anne-Sophie Rodríguez-Jerez, José Juan. Nanopartícules Aliments -- Manipulació -- Aspectes higiènics TiO2 Nanopartículas Desinfección fotocatalítica Higiene alimentari Two different TiO nanoparticles, NM101 and NM105, were evaluated against a range of Gram-positive (Staphylococcus aureus, Bacillus cereus, Lactobacillus casei, Lactobacillus bulgaricus, Lactobacillus acidophilus and Lactobacillus lactis) and Gram-negative (Salmonella enterica var. Enteridis and Escherichia coli) bacteria. Both NM101 and NM105 TiO nanoparticles (UV-exposed or none) had a significant antibacterial activity when the concentration of TiO suspension was 100 µg mL. The activation of the TiO NPs led, in all cases, to a shift in the growth curve, revealing lower counts as the concentration increased. E. coli was the most significantly affected pathogen by both TiO nanoparticles reaching among 2-3 log CFU.mL reduction. In addition, in the case of the probiotic bacteria, NM105 TiO nanoparticles had similar effects as the bacterial density was reduced by 2-3 log CFU.mL. These results may be applied as a potent technology to be included in the formulation of new disinfectants. 2019 Article CYTA - Journal of Food ; Vol. 17 Núm. 1 (enero 2019), p. 408-418 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. https://creativecommons.org/licenses/by/4.0/