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Antibacterial activity of standard and N-doped titanium dioxide-coated endotracheal tubes: an in vitro study

Overview of attention for article published in Revista Brasileira de Terapia Intensiva, January 2017
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Title
Antibacterial activity of standard and N-doped titanium dioxide-coated endotracheal tubes: an in vitro study
Published in
Revista Brasileira de Terapia Intensiva, January 2017
DOI 10.5935/0103-507x.20170009
Pubmed ID
Authors

Valentina Caratto, Lorenzo Ball, Elisa Sanguineti, Angelo Insorsi, Iacopo Firpo, Stefano Alberti, Maurizio Ferretti, Paolo Pelosi

Abstract

The aim of this study was to assess the antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa of two nanoparticle endotracheal tube coatings with visible light-induced photocatalysis. Two types of titanium dioxide nanoparticles were tested: standard anatase (TiO2) and N-doped TiO2 (N-TiO2). Nanoparticles were placed on the internal surface of a segment of commercial endotracheal tubes, which were loaded on a cellulose acetate filter; control endotracheal tubes were left without a nanoparticle coating. A bacterial inoculum of 150 colony forming units was placed in the endotracheal tubes and then exposed to a fluorescent light source (3700 lux, 300-700 nm wavelength) for 5, 10, 20, 40, 60 and 80 minutes. Colony forming units were counted after 24 hours of incubation at 37°C. Bacterial inactivation was calculated as the percentage reduction of bacterial growth compared to endotracheal tubes not exposed to light. In the absence of light, no relevant antibacterial activity was shown against neither strain. For P. aeruginosa, both coatings had a higher bacterial inactivation than controls at any time point (p < 0.001), and no difference was observed between TiO2 and N-TiO2. For S. aureus, inactivation was higher than for controls starting at 5 minutes for N-TiO2 (p = 0.018) and 10 minutes for TiO2 (p = 0.014); inactivation with N-TiO2 was higher than that with TiO2 at 20 minutes (p < 0.001), 40 minutes (p < 0.001) and 60 minutes (p < 0.001). Nanosized commercial and N-doped TiO2 inhibit bacterial growth under visible fluorescent light. N-TiO2 has higher antibacterial activity against S. aureus compared to TiO2.

Twitter Demographics

The data shown below were collected from the profile of 1 tweeter who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 17 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 3 18%
Student > Bachelor 2 12%
Researcher 2 12%
Student > Ph. D. Student 2 12%
Lecturer > Senior Lecturer 1 6%
Other 2 12%
Unknown 5 29%
Readers by discipline Count As %
Chemistry 4 24%
Materials Science 2 12%
Nursing and Health Professions 2 12%
Veterinary Science and Veterinary Medicine 1 6%
Medicine and Dentistry 1 6%
Other 1 6%
Unknown 6 35%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 27 April 2017.
All research outputs
#15,457,417
of 22,968,808 outputs
Outputs from Revista Brasileira de Terapia Intensiva
#148
of 332 outputs
Outputs of similar age
#257,166
of 421,088 outputs
Outputs of similar age from Revista Brasileira de Terapia Intensiva
#18
of 29 outputs
Altmetric has tracked 22,968,808 research outputs across all sources so far. This one is in the 22nd percentile – i.e., 22% of other outputs scored the same or lower than it.
So far Altmetric has tracked 332 research outputs from this source. They receive a mean Attention Score of 3.2. This one is in the 40th percentile – i.e., 40% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 421,088 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 30th percentile – i.e., 30% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 29 others from the same source and published within six weeks on either side of this one. This one is in the 20th percentile – i.e., 20% of its contemporaries scored the same or lower than it.