Fig. 3From: Production of acetoin and its derivative tetramethylpyrazine from okara hydrolysate with Bacillus subtilisSEM images of okara samples, either untreated dry okara (a1, a2, a3) or treated using cellulase (b1, b2, b3) and cellulase + β-glucosidase + pectinase (c1, c2, c3). The magnification and scale bars are provided in each micrographBack to article page