Fig. 5From: Novel method to achieve crystallinity of calcite by Bacillus subtilis in coupled and non-coupled calcium-carbon sourcesMineralized micro and nanofibers of BCC-EPS. SEM images of a BBC-GLC and c BCC-LAC are shown. The rectangles (b, d) indicate its respective magnifications, and nanofibers are pointed out (black arrow). Scale bars: 10 µm (a) and 1 µm (b), and 1 µm (c) and 0.5 µm (d)Back to article page