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A sustainable process for procuring biologically active fractions of high-purity xylooligosaccharides and water-soluble lignin from Moso bamboo prehydrolyzate

Biotechnology for biofuels, 2019-07, Vol.12 (1), p.189-189, Article 189

COPYRIGHT 2019 BioMed Central Ltd. ;COPYRIGHT 2019 BioMed Central Ltd. ;The Author(s) 2019 ;ISSN: 1754-6834 ;EISSN: 1754-6834 ;DOI: 10.1186/s13068-019-1527-3 ;PMID: 31384296

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  • Title:
    A sustainable process for procuring biologically active fractions of high-purity xylooligosaccharides and water-soluble lignin from Moso bamboo prehydrolyzate
  • Author: Huang, Caoxing ; Wang, Xucai ; Liang, Chen ; Jiang, Xiao ; Yang, Gan ; Xu, Jie ; Yong, Qiang
  • Subjects: Antioxidants (Nutrients) ; Biological active ; Chemical properties ; Fatty acids ; Fermentation ; Glucose ; Hydrolysis ; Lignin ; Monosaccharides ; Oligosaccharides ; Polystyrene ; Polystyrene divinylbenzene resin ; Prehydrolyzate ; Production processes ; Pulp fiction ; Separation (Technology) ; Soluble lignin ; Sugar industry ; Water ; Wood pulp industry ; Xylooligosaccharides
  • Is Part Of: Biotechnology for biofuels, 2019-07, Vol.12 (1), p.189-189, Article 189
  • Description: Prehydrolyzate, which is from the prehydrolysis process in dissolving pulps industry, contains various sugar-derived and lignin compounds such as xylooligosaccharides (XOS), gluco-oligosaccharides, xylose, glucose, and soluble lignin (S-L). The XOS has several beneficial effects on human physiology. XOS and S-L in prehydrolyzate are difficult to efficiently fractionate due to their similar molecular weights and water solubility. In this work, we proposed a sustainable and green process using polystyrene divinylbenzene (PS-DVB) resin to simultaneously separate and recover XOS and S-L. Enzymatic hydrolysis with endo-1,4-β-xylanase and fermentation with were sequentially applied to purify XOS to minimize xylose content as well as amplify contents of xylobiose and xylotriose. In addition, 2D-HSQC NMR was used to analyze the structural characteristics of XOS and S-L. Furthermore, the biological abilities of antioxidants and prebiotics of these fractions were investigated by scavenging radicals and cultivating intestinally beneficial bacterias, respectively. Results showed that PS-DVB resin could simultaneously separate XOS and solubilized lignin with excellent yields of 93.2% and 85.3%, respectively. The obtained XOS after being purified by enzymatic hydrolysis and fermentation contained 57.7% of xylobiose and xylotriose. 10.4% amount of inherent xylan was found in the S-L fraction obtained by PS-DVB resin separation. 2D-HSQC NMR revealed that lignin carbohydrate complexes existed in both XOS and S-L as covalent linkages between lignin and 4- -methylglucuronoarabinoxylan. The biological application results showed that the antioxidant capacity of S-L was stronger than XOS, while XOS was superior in promoting growth of intestinal and stimulating production of short-chain fatty acids by The proposed strategy of sequentially combining hydrophobic resin separation, enzymatic hydrolysis, and fermentation was successfully demonstrated and resulted in simultaneous production of high-quality XOS and solubilized lignin. These biomass-derived products in prehydrolyzate can be regarded as value-adding prebiotics and antioxidants.
  • Publisher: England: BioMed Central Ltd
  • Language: English
  • Identifier: ISSN: 1754-6834
    EISSN: 1754-6834
    DOI: 10.1186/s13068-019-1527-3
    PMID: 31384296
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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