Bactericidal activity of titanium dioxide ultraviolet-induced films

Плескова, С. Н.; Голубева, И. С.; Verevkin, Yu K

doi:10.1016/j.msec.2015.10.021

Cited by 32 publications

(29 citation statements)

References 51 publications

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“…Pleskova et al . studied bactericidal activity of TiO 2 film and also found that S. aureus is swollen by TiO 2 through damaging the cell membrane [27]. An et al .…”

Section: Discussionmentioning

confidence: 99%

Bactericidal mechanisms and effector targets of TiO 2 and Ag-TiO 2 against Staphylococcus aureus

Jiang

Wang

et al. 2017

Journal of Medical Microbiology

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PurposeIn our previous study, Ag+-loaded TiO2 and Ag+-loaded SiO2 coatings for tracheal intubation were prepared to prevent ventilator-associated pneumonia (VAP), but the antimicrobial targets and the underlying mechanisms of TiO2 and Ag-TiO2 (Ag+) are still unclear. We attempted to elucidate the antimicrobial activity and potential mechanisms against Staphylococcus aureus.MethodologyThe study tested the TiO2 and Ag+ bacteriostatic activity against S. aureus strains by MIC assays and S. aureus growth curves, lesion in the membranes by surface hydrophobicity tests, conductivity tests and measurements of DNA and RNA contents in S. aureus cultures, and investigated the inhibition of soluble protein and nucleic acid synthesis by measurements of soluble protein content, fluorescent intensity and nucleic acid content of living S. aureus.ResultsThe MIC values of TiO2 and Ag+ were 1.6 mg ml−1 and 5.781 µg ml−1. TiO2 and Ag+ could inhibit the growth of S. aureus. After treatment with TiO2 and Ag+, the surface hydrophobicity was significantly reduced, the conductivity of cultures increased, and DNA and RNA content in cultures showed no obvious changes. The expressions of soluble proteins and nucleic acid contents of living S. aureus were reduced after treatment with TiO2 and Ag+.ConclusionTiO2 and Ag+ could cause slight lesion in the membrane to affect S. aureus membrane permeability, but not decomposition of membrane. Moreover, TiO2 and Ag+ could lead to reduced expression of soluble protein by inhibiting the synthesis of nucleic acids, thereby further inhibiting the growth of S. aureus.

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“…Pleskova et al . studied bactericidal activity of TiO 2 film and also found that S. aureus is swollen by TiO 2 through damaging the cell membrane [27]. An et al .…”

Section: Discussionmentioning

confidence: 99%

Bactericidal mechanisms and effector targets of TiO 2 and Ag-TiO 2 against Staphylococcus aureus

Jiang

Wang

et al. 2017

Journal of Medical Microbiology

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“…Antibacterial activity of TiO 2 has been presented in the literature; the packing, textile and health-care industries have successfully used TiO 2 in their products with the objective to reduce the risk of microorganism transmission. Adding to the biodegradable nature of PHB this research is dealing with a very promising compound [17][18][19][20][21][22][23][24][25][26] . The non-isothermal melt and cold crystallization, and melting processes of PHB/TiO 2 nanocompounds were investigated by differential scanning calorimetry (DSC) applying heating/cooling/reheating cycles (six different heating/cooling rates); thermal parameters related to these processes are presented with the main objective to provide a reference of crystallization and melting parameters for these compounds.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat cycling on melting and crystallization of PHB/TiO2 compounds

et al. 2018

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ObstractCompounds of poly(3-hydroxybutyrate) (PHB) and titanium dioxide (TiO 2 ) with filler content between 1% and 10% were prepared in a laboratory internal mixer. The effect of heating and cooling rates on the crystallization and melting of PHB/TiO 2 compounds was investigated by differential scanning calorimetry (DSC). Melt and cold crystallization rates rise with increasing cooling/heating rates. A higher cooling rate translates to a lower melt crystallization temperature, while a higher heating rate results in a higher cold crystallization temperature. TiO 2 promotes melt crystallization of PHB, behaving as a nucleant agent. The total crystallinity developed after melt and cold crystallization decreases for low levels of TiO 2 , i.e. 2% per weight, and is almost independent of the heating/cooling rate. The melting temperatures and rates are minimally affected by both the heating rate and filler content. The results suggest that the desired PHB microstructure can be controlled by filler content and adjusted heating/cooling rate.

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“…14,54,55 Several groups have demonstrated effective bacterial and fungal reduction using N-TiO 2 NPs and films. [56][57][58] In the present work, a repeatable, dose-dependent (0-200 μg/mL) toxicity toward E. coli resulted upon blue light treatment (Figure 8).…”

mentioning

confidence: 99%