xylan/atrophy

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Xylan deterioration approach: Purification and catalytic behavior optimization of a novel β-1,4-d-xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29.

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The β-1,4-d-xylanohydrolase is an industry valuable catalytic protein and used to synthesize xylooligosaccharides and xylose. In the current study, β-1,4-d-xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29 was partially purified up to 9.5-fold with a recovery yield of 52%. It

Hygroscopicity of Waterlogged Archaeological Wood from Xiaobaijiao No.1 Shipwreck Related to Its Deterioration State.

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Waterlogged archaeological wood (WAW) artifacts, made of natural biodegradable polymers, are important parts of many precious cultural heritages. It is of great importance to understand the hygroscopic behavior of WAW in different deterioration states for the development of optimal drying processes

Conversion of Acetic Acid from the Catalytic Pyrolysis of Xylan Over CeO2.

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CeO2 was synthesized hydrothermally in supercritical water and applied to the catalytic pyrolysis of xylan. Acetic acid, which is the main component in bio-oil produced from the non-catalytic pyrolysis of xylan, deteriorates the fuel quality of the oil. Catalysis over CeO2 effectively converted the

Remediation of deterioration in microbial structure in continuous Pinellia ternata cropping soil by crop rotation.

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Pinellia ternata is a traditional Chinese herb that suffers from continuous cropping (CC), which significantly decreases both yield and quality. The influence of CC on the microbiome in P. ternata rhizosphere and the effects of remediation on microbiota by rotational cropping (CR) were assessed by

Molecular detection and diversity of xylanase genes in alpine tundra soil.

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Xylan is a major polysaccharide in plant cell walls, and its degradation is mainly conducted by microbial xylanases in nature. To explore the xylanase diversity in the environment, two sets of degenerate primers were designed based on the microbial xylanase sequences in Pfam database of glycosyl

High genetic diversity and different distributions of glycosyl hydrolase family 10 and 11 xylanases in the goat rumen.

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BACKGROUND The rumen harbors a complex microbial ecosystem for efficient hydrolysis of plant polysaccharides which are the main constituent of the diet. Xylanase is crucial for hemicellulose hydrolysis and plays an important role in the plant cell wall degradation. Xylanases of ruminal strains were

Even Visually Intact Cell Walls in Waterlogged Archaeological Wood Are Chemically Deteriorated and Mechanically Fragile: A Case of a 170 Year-Old Shipwreck.

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Structural and chemical deterioration and its impact on cell wall mechanics were investigated for visually intact cell walls (VICWs) in waterlogged archaeological wood (WAW). Cell wall mechanical properties were examined by nanoindentation without prior embedding. WAW showed more than 25% decrease

Safety evaluation of the food enzyme endo-1,4-β-xylanase from a genetically modified Aspergillus oryzae (strain NZYM-FA)

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The food enzyme is an endo-1,4-β-xylanase (EC 3.2.1.8) produced with a genetically modified strain of Aspergillus oryzae by Novozymes A/S. The genetic modifications do not give rise to safety concerns. The food enzyme is free from viable cells of the production organism and recombinant DNA.

Cloning and targeted gene disruption of XYL1, a beta 1,4-xylanase gene from the maize pathogen Cochliobolus carbonum.

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The gene, XYL1, encoding the major extracellular endo-beta 1,4-xylanase from the maize pathogen Cochliobolus carbonum was cloned using a synthetic, degenerate oligonucleotide based on a tryptic fragment from the purified enzyme. The deduced product of XYL1 has a M(r) of 20,869 and a predicted pI of

Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties.

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Samples of bleached kraft pine cellulosic pulp, either treated with an enzyme preparation (a Thermomyces lanuginosus xylanase, an Aspergillus sp. cellulase, and a multienzyme preparation NS-22086 containing both these activities) or untreated, were refined in a laboratory PFI mill. The treatment

Influence of Human Activities on Broad-Scale Estuarine-Marine Habitats Using Omics-Based Approaches Applied to Marine Sediments.

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Rapid urban expansion and increased human activities have led to the progressive deterioration of many marine ecosystems. The diverse microbial communities that inhabit these ecosystems are believed to influence large-scale geochemical processes and, as such, analyzing their composition and

Endoglucanase I from the edible straw mushroom, Volvariella volvacea. Purification, characterization, cloning and expression.

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We isolated an endoglucanase, EG1, from culture fluid of Volvariella volvacea grown on crystalline cellulose by ion-exchange and gel filtration chromatography, and preparative PAGE. EG1 has a molecular mass of 42 kDa as determined by SDS/PAGE and an isoelectric point of 7.7. Enzyme-catalysed

Targeted differential display of abundantly expressed sequences from the basidiomycete Phanerochaete chrysosporium which contain regions coding for fungal cellulose-binding domains.

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Cellulose-binding domains (CBDs) are present in the majority of fungal cellulases studied to-date. This work describes the use of targeted differential display, employing degenerate primers designed to anneal to variants of a region conserved in fungal CBDs, each in combination with an oligo-dT

Functional analysis of arabinofuranosidases and a xylanase of Corynebacterium alkanolyticum for arabinoxylan utilization in Corynebacterium glutamicum.

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Xylooligosaccharides (XOSs) and arabinoxylooligosaccharides (AXOSs) are major oligosaccharides derived from arabinoxylan. In our previous report, Corynebacterium glutamicum was engineered to utilize XOSs by introducing Corynebacterium alkanolyticum xyloside transporter and β-xylosidase. However,

[Molecular cloning and heterologous expression of a new xylanase gene from Verticillium dahliae].

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OBJECTIVE Fungus Verticillium dahliae caused greensickness of cotton and xylanase is necessary in this pathogenesis. Cloning xylanase gene from V. dahliae and heterologous expression might obtain new xylanase. METHODS By comparing the amino acid sequences of over 10 xylanases in 11 families from

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