Figure 7From: Secondary mineral formation associated with respiration of nontronite, NAu-1 by iron reducing bacteria(a) In all systems with either viable or killed DIRB, regardless of the O2 concentrations, we found small (~50 nm) globules of amorphous Si encrusting bacterial cells and EPS, as shown in this TEM bright field image, (b) EDXS spectrum shows that the amorphous globules are rich in Si. The Zn signal is from the sample mounting material.Back to article page