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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 https://ddd.uab.cat/record/223660 urn:10.1080/19476337.2019.1590461 urn:oai:ddd.uab.cat:223660 urn:scopus_id:85073959389 urn:articleid:19476345v17n1p408 urn:recercauab:ARE-91455 urn:oai:egreta.uab.cat:publications/3ac2482a-4c3f-4845-a0dd-7e5ee1516625 urn:oai:egreta.uab.cat:publications/95fca4ad-f3e7-42fc-9f21-c16ece80df20 spa 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/ application/pdf