MOESM1 of Epoxidation and etherification of alkaline lignin to prepare water-soluble derivatives and its performance in improvement of enzymatic hydrolysis efficiency

Additional file 1. Figure S1. The solubility of sodium lignosulphonate (LS) and alkaline lignin (AL) in epichlorohydrin before (a) and after (b) adding EDTA. Figure S2. The comparison of emulsification tests between LP1000140 and commercial surfactant Tween-80. The scale bar at lower right corner in each image represents 100 Οm.