FIGURE 1.

Visualization of Klebsiella aerogenes biofilm on the surface of high‐grade monazite ore (A, D), monazite‐muscovite crystals (B) and xenotime crystals (C). CLSM images are the merged images of Hoechst 33342 (blue) and DiTO‐1 (green) to maximize microbial cell visualization, and transmitted light channels. The image shows the maximum fluorescent intensity of the acquired Z‐stack images where blue, green or cyan colours on the surface of the ore grains (the dark grains) are representative of the microbial biofilm, the red circles in secondary electron SEM images (panel D) indicate on the small number of bacteria on the surface.