Natural products to control biofilm on painted surfaces

Usnic acid, a natural antimicrobial agent able to inhibit bacterial biofilm formation on polymer surfaces.

In modern medicine, artificial devices are used for repair or replacement of damaged parts of the body, delivery of drugs, and monitoring the status of critically ill patients. However, artificial surfaces are often susceptible to colonization by bacteria and fungi. Once microorganisms have adhered to the surface, they can form biofilms, resulting in highly resistant local or systemic infection...

Perspective distortion analysis for mosaicing images painted on cylindrical surfaces

A set of monocular images of a curved painting is taken from di erent viewpoints around its curved surface. After deriving the surface localization in the camera coordinate system we backproject the image on the curved surface and we atten it. We analyze the perspective distortions of the scene in the case when it is mapped on a cylindrical surface. Based on the result of this analysis we deriv...

Algae and Cyanobacteria on Painted Surfaces in Southern Brazil

Algae and cyanobacteria disfigure the external surfaces of buildings and may cause their physico-chemical deterioration. Even though the climate in Brazil is humid, there is no published literature on this problem. The objective of this work was to identify the major phototrophs present on Brazilian constructions in residential, urban and rural sites. The algal and cyanobacterial types present ...

Biofilm Formation on Restored Root Surfaces

Biofilm Formation on Polymeric Heat Transfer Surfaces

The biofouling affinity on different polymeric surfaces (PP, PSU, PET, PEEK) in comparison with SS 1.4301 was studied using the model bacterium E.coli K12 DSM 498. A test rig with seven identical chambers allowed investigations at different system conditions (throughputs, inclination of the heat transfer cell, etc.). The biofilm mass deposited on the polymer surfaces was several magnitudes smal...