Fig. 4

FTIR spectrum for EPS derived from B. cereus cultivated under sugarcane molasses at different concentrations (a) control (b) 1% (c) 2% (d) 3% (e) 4% (f) 5%, indicating functional groups detected. The peaks indicate O-H stretching (3650–3200 cm^− 1), C-H stretching (3000–2850 cm^− 1), C=C stretching (1680–1450 cm^− 1), −CH₂ bending (1500–1320 cm^− 1) and C-O stretching (1300–1000 cm^− 1)