Assertion: lignin's solubility | /r/HasProperty | gray et al.
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text: In addition, there is evidence that the high solubility of hemi-cellulose could aid in taking lignin into solution despite the low solubility of the later (Gray et al., 2003, 2007), but that the lignin would fall back onto the biomass once it breaks free from hemicellulose and polymerizes to low solubility compounds (Liu and Wyman, 2003, 2004a, 2004b, 2005; Yang et al., 2004).