Isolation of hemicellulose from a sorghum, Andropogon sorghum Brot, Kumadake no. 263, and determination of its constituent sugars

Kitayama, Takashi; Morimoto, Miwa; Takatani, Masahiro; Tamura, Y; Takumi, Masaru; Okamoto, Tadashi

doi:10.1016/s0008-6215(00)00002-1

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…The cellulose chains stack in sheets, the sheets stack on top of each other, and the stacked sheets in turn form the quaternary structure: quadratic and very long crystal fibrillar aggregates 3. Hemicellulose is a branched heteropolymer of mainly xylose, about 84 %, and other saccharides such as arabinose, galactose, mannose, and glucose 2b. Lignin is a polymer network of aromatic compounds such as p ‐coumaryl alcohol, coniferyl alcohol, and sinapyl alcohol.…”

Section: Introductionmentioning

confidence: 99%

Enzyme‐Catalyzed Synthesis of Saccharide Acrylate Monomers from Nonedible Biomass

Kloosterman

Brouwer

Loos³

2014

Chemistry An Asian Journal

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Various cellulase preparations were found to catalyze the transglycosidation between cotton linters and 2-hydroxyethyl acrylate. The conversion and enzyme activity were found to be optimal in reaction mixtures that contained 5 vol % of the acrylate. The structures of the products were revealed by using TLC and (1) H and (13) C NMR spectroscopy. The enzyme-catalyzed reaction resulted in two products. The minor product originated from transglycosidation to hemicellulose and was found to be 2-(β-xylosyloxy)-ethyl acrylate. The major product was identified as 2-(β-glucosyloxy)-ethyl acrylate and the yield of the product was 5 wt % based on the amount of consumed cellulose. Glycosidation products with oligosaccharide moieties could not be detected in the reaction mixture. This result can be explained by the hydrolytic activities of the used cellulase preparation. Cellulase from Trichoderma reesei was found to possess, in addition to endoglucanase activity, cellobiosidase and β-glucosidase activities. Five other cellulase preparations from different origins were tested as well for catalysis of oligosaccharide acrylate synthesis. For most cellulase preparations the major transglycosidation product appeared to be 2-(β-glucosyloxy)-ethyl acrylate. Nevertheless, the endo-β-(1,4)-glucanase from Trichoderma longibrachiatum was found to catalyze the synthesis of 2-(β-cellobiosyloxy)-ethyl acrylate. Unlike the other cellulase preparations, endo-β-(1,4)-glucanase from T. longibrachiatum showed no detectable β-glucosidase activity and therefore oligosaccharide acrylate monomers were not further hydrolyzed into the monosaccharide acrylate 2-(β-glucosyloxy)-ethyl acrylate.

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Section: Introductionmentioning

confidence: 99%

Enzyme‐Catalyzed Synthesis of Saccharide Acrylate Monomers from Nonedible Biomass

Kloosterman

Brouwer

Loos³

2014

Chemistry An Asian Journal

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“…In the early stage, people studied the content and the structure of hemicellulose in various kinds of wood. Then many researchers did a lot of work in the selective extraction [1][2][3][4][5] and structure determination of hemicellulose. However, modification and application of hemicellulose were not researched much at the time.…”

Section: Introductionmentioning

confidence: 99%

Etherifying Modification of Xylan-Type Hemicellulose and its Characterization

Chen

Zhou

et al. 2013

AMR

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The reaction of the xylan-type hemicellulose with 2,3-epoxypropyltrimethylammonium chloride and acrylamide in ethanol-water-alkali slurry yielded water-soluble, cationic etherified xylan-type hemicellulose derivatives. The degree of substitution (DS) value reaches up to 0.40 by adjusting the mass ratios (NaOH/hemicellulose, total etherifying agents/hemicellulose and 2,3-epoxypropyltrimethylammonium chloride/acrylamide), the reaction temperature and the reaction time in a one-step synthesis. The etherified hemicellulose was characterized by infrared spectroscopic analysis (FT-IR), Zeta potential analysis, charge density analysis and thermogravimetric analysis (TGA). It is found that Zeta potential is promoted from-30.50mv to +35.81mv and charge density is promoted from-0.50mmol/g to +0.88mmol/g during etherification under the conditions used. The thermal stability of the etherified hemicellulose is lower than that of the unmodified xylan-type hemicellulose polymers.

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“…Biomass combustion is not the only renewable application as it can also be utilized as feedstock for biosynthetic pathways in which case the chemical composition of biomass is important ,, The lignin fraction acts like a “glue” that holds the cellulose and hemicellulose fibers together …”

Section: Introductionmentioning

confidence: 99%

Biodevelopment of Wastepaper as a Resource of Renewable Energy: Influence of Enzyme Concentration and Paper Amount on the Bioconversion Process

Wyk

2002

Energy Fuels

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Renewable energy would become more topical as natural energy resources are depleted. Also a major global issue is the extent of solid waste generation of which biowaste is the main component and development of its bio-energy potential can address issues such as renewable energy and environmental pollution, simultaneously. Used paper is a primary component of biowaste with cellulose its dominant structural biopolymer. Various used paper materials have been treated with a cellulose hydrolyzing enzyme from Penicillium funiculosum to bioconvert their cellulose component into sugars such as glucose that could be utilized as feedstock for the synthesis of biodegradable products such as bio-ethanol. These paper materials exhibited nonsimilar susceptibilities toward this cellulase enzyme and consequently different sugar releasing and bioconversion efficiency patterns were obtained when changing quantities of each paper were treated with a fixed amount of enzyme. When a fixed amount of each paper material was treated with increasing enzyme concentrations, different bioconversion and efficiency profiles were also constructed for each paper material biodegraded.

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Isolation of hemicellulose from a sorghum, Andropogon sorghum Brot, Kumadake no. 263, and determination of its constituent sugars

Cited by 7 publications

References 5 publications

Enzyme‐Catalyzed Synthesis of Saccharide Acrylate Monomers from Nonedible Biomass

Enzyme‐Catalyzed Synthesis of Saccharide Acrylate Monomers from Nonedible Biomass

Etherifying Modification of Xylan-Type Hemicellulose and its Characterization

Biodevelopment of Wastepaper as a Resource of Renewable Energy: Influence of Enzyme Concentration and Paper Amount on the Bioconversion Process

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