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. 2014 Sep 24;9(9):e108449. doi: 10.1371/journal.pone.0108449

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© 2014 Jia et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) Biomass residues released from pretreatments with 1% NaOH and 1% H₂SO₄; (B) Biomass residues released from enzymatic hydrolysis after 1% NaOH and 1% H₂SO₄ pretreatments. Arrow indicated the rough face.