Evaluating Lignin-Rich Residues from Biochemical Ethanol Production of Wheat Straw and Olive Tree Pruning by FTIR and 2D-NMR

Figure 1

FTIR spectra, 4000–600 cm⁻¹ region, of the lignin-rich residues from wheat straw (a) and olive tree pruning (b) WIS fractions.

(a)

(b)