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. 2017 Jun 19;10:157. doi: 10.1186/s13068-017-0846-5

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Hemicellulose solubilization and cellulose recovery after steam pretreatments performed at a constant severity of 3.6 with the addition of 0.7 wt% H₂SO₄ (on biomass) and temperatures increasing in 10 °C increments from 160 to 200 °C denoted, SP1–SP5 respectively. Sample SP2# was treated without the addition of the H₂SO₄ catalyst