Figure 1
From: Tracking the cellulolytic activity of Clostridium thermocellum biofilms
Substrate heterogeneity. Micrographs of Whatman filter paper showing highly heterogeneous fiber distribution, pores and channels, which make quantitative differentiation of inner structure properties and of cellulose area available for microbial adhesion not possible. Images taken with confocal reflection microscopy of paper chads sputter-coated with gold. In the current study we refer to biofilm ‘real-estate’ as the portion of the cellulose surface that is accessible to microbial adhesion.