SEM images of BNC samples in 72 h of culture, ×5000 zoom: (A–C)—Komagataeibacter xylinus B-12429; (D–F)—Komagataeibacter xylinus B-12431; (G–I)—Medusomyces gisevii Sa-12; (A,D,G)—miscanthus hydrolyzate; (B,E,H)—oat-hull hydrolyzate; and (C,F,I)—control medium.