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. 2010 Dec 3;107(51):22038–22043. doi: 10.1073/pnas.1010341107

Fig. 1.

Fig. 1.

Removable acrylic appliance withholding two resin composite discs and two discs of resin composite incorporating QPEI. Confocal laser microscope surface images of the attached biofilm formed on (1) resin composite mainly show dead cells stained red, whereas biofilm formed on (2) resin composite incorporating QPEI nanoparticles mainly shows live cells stained green.