Fig. 2

Xylan deacetylation during OrganoCat pretreatment. a ¹H-¹³C HSQC-NMR of untreated Miscanthus biomass indicated the signals used to quantify the degree of xylan acetylation of the biomass. b Comparison of xylan-O-acetylation of Sida, Beech wood, and Miscanthus before and after pretreatment. 2-OAc is indicated by light color, 3-OAc by medium color and 2,3-OAc by dark color. Values are expressed as mean ± standard deviation; n = 3