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Multivariate analysis of different chemical pretreatment methods can aid to select the most appropriate strategy to valorize a particular biomass.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Amongst methods tested, the\u00a0pretreatment by using sodium hydroxide in combination with methyltrioctylammonium chloride, an ionic liquid, (NaOH+IL) was the most significant for xylanase production by <jats:italic>Bacillus aestuarii\u00a0<\/jats:italic>UE25. Investigation of optimal levels of five significant variables by adopting Box-Behnken design (BBD) predicted 20\u2009IU\u2009mL<jats:sup>\u2212\u20091<\/jats:sup> of xylanase and experimentally, a titer of 17.77\u2009IU\u2009mL<jats:sup>\u2212\u20091<\/jats:sup> was obtained which indicated the validity of the model. The production kinetics showed that volumetric productivity of xylanase was much higher after 24\u2009h (833.33\u2009IU\u2009L<jats:sup>\u2212\u20091<\/jats:sup>\u2009h<jats:sup>\u2212\u20091<\/jats:sup>) than after 48\u2009h (567.08\u2009IU\u2009L<jats:sup>\u2212\u20091<\/jats:sup>\u2009h<jats:sup>\u2212\u20091<\/jats:sup>). The extracted xylan from SB induced more xylanase in the fermentation medium than pretreated SB or commercially purified xylan. Nuclear Magnetic Resonance, Fourier transform infrared spectroscopy and scanning electron microscopy of SB indicated removal of lignin and changes in the structure of SB after NaOH+IL\u00a0pretreatment and fermentation.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Combined pretreatment of SB with alkali and\u00a0methyltrioctylammonium\u00a0chloride\u00a0appeared better than other chemical methods for bacterial xylanase production and for the extraction of xylan form SB.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12896-020-00657-4","type":"journal-article","created":{"date-parts":[[2020,12,9]],"date-time":"2020-12-09T09:34:03Z","timestamp":1607506443000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["Combined pretreatment of sugarcane bagasse using alkali and ionic liquid to increase hemicellulose content and xylanase production"],"prefix":"10.1186","volume":"20","author":[{"given":"Rozina","family":"Rashid","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Uroosa","family":"Ejaz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Firdous Imran","family":"Ali","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Imran Ali","family":"Hashmi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed","family":"Bari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pengcheng","family":"Fu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7208-9441","authenticated-orcid":false,"given":"Muhammad","family":"Sohail","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,12,9]]},"reference":[{"key":"657_CR1","doi-asserted-by":"publisher","first-page":"14","DOI":"10.1016\/j.resconrec.2013.03.002","volume":"75","author":"YR Loh","year":"2013","unstructured":"Loh YR, Sujan D, Rahman ME, Das CA. 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