Fig. 4: Field emission scanning electron micrographs (FE-SEM) of Methanococcus voltae cells grown with synthetic and specimen pyrite as the sole Fe and S source.
From: Reductive dissolution of pyrite by methanogenic archaea
a Cells of M. voltae grown with synthetic pyrite (FeS2) or b specimen FeS2. c Synthetic FeS2 or d specimen FeS2 in the absence of M. voltae. Samples were fixed with 2% glutaraldehyde before FE-SEM imaging on gold-sputtered 0.2 µm polycarbonate filters. Scale bar equals 0.5 µm in a–c and 1.0 µm in d.
