Fractional and structural characterization of wheat straw hemicelluloses

Sun, Run‐Cang; Lawther, J. M.; Banks, W. B.

doi:10.1016/s0144-8617(96)00018-5

Cited by 218 publications

(74 citation statements)

References 10 publications

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“…There is limited or no report on corn stover xylan structure compared to those of other grasses and cereals such as wheat, barley, rye bran and rice straw Percentage amount calculated based on proton NMR-spectra integration -, None detected (Sun et al 1996;Roubroeks et al 2000;Kabel et al 2002). …”

Section: Resultsmentioning

confidence: 99%

Extraction and characterization of native heteroxylans from delignified corn stover and aspen

Naran¹,

Black

Decker

et al. 2009

Cellulose

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Dimethylsulfoxide-solubilized polysaccharides from delignified corn stover and aspen were characterized. The biomass was delignified by two different techniques; a standard acid chlorite and a pulp and paper QPD technique comprising chelation (Q), peroxide (P), and acid-chlorite (D). Major polysaccharides in all fractions were diversely substituted xylan. Xylan acetylation was intact after chlorite delignification and, as expected, xylan from QPDdelignified fraction was de-acetylated by the alkaline peroxide step. The study of DMSO-extractable xylans from chlorite-delignified biomass revealed major differences in native acetylation patterns between corn stover and aspen xylan. Xylan from cell walls of corn stover contains 2-O-and 3-O-mono-acetylated xylan and [MeGlcA-a-(1 ? 2)][3-OAc]-xylp units. In addition, aspen xylan also contains 2,3-di-O-acetylated xylose. 1,4-b-D-xylp residues substituted with MeGlcA at O-2 position are absent in chlorite-delignified aspen xylan. Sugar composition in accord with NMRspectroscopic data indicated that corn stover xylan is arabinosylated while aspen xylan is not. We have shown that corn stover xylan has similar structure with xylans from other plants of Poales order. No evidence was found to indicate the presence of 1,4-b-D-[MeGlcA-a-(1 ? 2)][Ara-a-(1 ? 3)]-xylp in corn stover xylan fractions.Keywords Biomass Á Biomass delignification Á Plant cell wall Á Glucuronoxylan Á Hardwood xylan Á Corn stover xylan Á Xylan acetylation Á Endoxylanase Á Homo-and-heteronuclear NMR-spectroscopy Á MALDI-TOF MS Abbreviations MGX 4-O-Methylglucuronoxylans GAX Glucuronoarabinoxylans MLG Mixed-linkage glucan MeGlcA 4-O-Methylglucuronic acid QA QPD-delignified DMSO-solubilized HMW fraction from aspen QS QPD-delignified DMSO-solubilized HMW fraction from corn stover CA Chlorite-delignified DMSO-solubilized HMW fraction from aspen CS Chlorite-delignified DMSO-solubilized HMW fraction from corn stover MW Molecular weight DP Degree of polymerization

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Section: Resultsmentioning

confidence: 99%

Extraction and characterization of native heteroxylans from delignified corn stover and aspen

Naran¹,

Black

Decker

et al. 2009

Cellulose

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“…Contents of these polymers depend on plant species and variety as well as cultivation conditions. For instance, according to Sun et al (1996) (Sun et al 1997). The study of Ludot et al (2014) revealed that lignin content in wheat straw was around 21.7 % d.w. while contents of D-glucose, Dxylose, L-arabinose and uronic acids were 35.8, 21.5, 2.4 and 1.9 % d.w., respectively.…”

Section: Introductionmentioning

confidence: 99%

Production of glucose-rich enzymatic hydrolysates from cellulosic pulps

et al. 2014

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The digestibility of cellulosic pulps derived by the sulfate process was assessed using commercial multienzyme preparations. Poplar wood pulps of relatively low lignin contents (Kappa numbers of 15.4-24.2), birch, beech and pine wood pulps (Kappa numbers of 25.8-31.4), and wheat straw pulp (Kappa number of 29.5) were efficiently hydrolyzed by a commercial preparation NS-22086 from Novozymes, containing cellulases and xylanases. At around 1.3 % (w/w) substrate concentration, yields of glucose from the poplar pulps were around 80 % on a dry weight (d.w.) basis while for the other four pulps they varied between approximately 70 % (for pine pulp) and 78 % d.w. (for beech and wheat straw pulps). At around 7.4 % (w/w) poplar pulp (Kappa number of 24.2) concentration, glucose yield was around 61 % d.w. The NS-22086 preparation almost completely saccharified fines from a paper mill (around 74 % glucose yields on a dry weight basis) while digestion of poplar chips (particle size of 1.6-2.0 mm) and wheat straw chaff (particle size up to 6 mm) yielded around 5.3 and 14 % d.w. glucose, respectively (total reducing sugars yields of around 16 and 23 % d.w., respectively). These results show that plant biomass may be efficiently converted to glucose-rich hydrolysates by a two-step processing, consisting of kraft pulping followed by treatment with endo-and exo-type cellulases and hemicellulases. Glucose-rich hydrolysates may be also obtained by enzymatic digestion of fines from paper mills.

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“…Gravimetric determination of lignin in cultivated substrates was estimated according to (Sun et al, 1996 andAdsul et al, (2005). 10 gm of air-dried substrate was fragmented into small pieces and suspended in 200 ml 1 % (wt /vol) aqueous solution of NaOH.…”

Section: Determination Of Lignin Contentmentioning

confidence: 99%

Cultivation of Oyster Mushroom and Recovery of Value Added by- products from Biodegradable Lignocellulosic Waste Materials by Solid State Fermentation

Padhye¹,

Atawane²

2017

Int.J.Curr.Res.Aca.Rev.

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Article InfoIn the present study, the edible fungus Pleurotus sajor-caju was investigated for its ability to grow on different lignocellulosic substrates namely, water hyacinth, wood chips and paddy and to produce various lignocellulolytic enzymes such as cellulase, xylanase and pectinase. The production pattern of the extracellular enzymes, total proteins and reducing sugar level was studied during the growth of this fungus under Solid State Fermentation (SSF) for a period of 56 days. Wheat grains were rapidly utilized and consumed by the fungus as a simple carbon source and were used for spawn formation. Different lignocellulosic complex carbon sources served as substrates and exhibited better induction process for more enzyme biosynthesis and production. The maximum activity of enzymes was obtained on 28 th and 56 th day of culture growth. The total yield of mushroom grown on different lignocellulosic substrates and levels of cellulose, pectinase and xylanase was also detected.

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Fractional and structural characterization of wheat straw hemicelluloses

Cited by 218 publications

References 10 publications

Extraction and characterization of native heteroxylans from delignified corn stover and aspen

Extraction and characterization of native heteroxylans from delignified corn stover and aspen

Production of glucose-rich enzymatic hydrolysates from cellulosic pulps

Cultivation of Oyster Mushroom and Recovery of Value Added by- products from Biodegradable Lignocellulosic Waste Materials by Solid State Fermentation

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