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. 2020 Sep 26;9(10):793. doi: 10.3390/pathogens9100793

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Mechanical and thermal properties of biofilm and silicone from representative VPs belonging to the fifth time-group. Panel (A) shows biofilm stiffness on the silicone surface compared to the clean material. Panel (B) shows changes in silicone surface stiffness after biofilm removal. Panels (C,D) show changes in the thermal properties of silicones under biofilm influence: changes in silicone crystallinity and silicone activation energy, respectively (n = 10, * p ≤ 0.05) were considered to be statistically significant; *** p ≤ 0.001; N.S.S.—not statistically significant).