Fig. 2
From: Effective alkaline metal-catalyzed oxidative delignification of hybrid poplar
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13068-016-0442-0/MediaObjects/13068_2016_442_Fig2_HTML.gif)
Mass loss and cell wall composition change associated with pretreatments under standard (reference case) or modified Cu-AHP conditions. Fed-batch Cu-AHP indicates fed-batch addition of H2O2 and pre-extraction refers to alkaline pre-extraction prior to Cu-AHP pretreatment. The values reported are the averages of the three biological replicates, and the error bars indicate ± standard deviations of the means