ArticleJournal of industrial microbiology & biotechnology2009
Production of xylanase by Aspergilli using alternative carbon sources: application of the crude extract on cellulose pulp biobleaching.
Article in Journal of industrial microbiology & biotechnology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 56 citations in OpenAlex.
- Article
- Closely related fungi employ diverse enzymatic strategies to degrade plant biomass.Biotechnology for biofuels · 2015Article
- Screening of thermotolerant and thermophilic fungi aiming β-xylosidase and arabinanase production.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2014Article
- Characterization and constitutive expression of an acidic mesophilic endo-1,4-β-D-xylanohydrolase with high thermotolerance and catalytic efficiency in Pichia pastoris.World journal of microbiology & biotechnology · 2013Article
- Purification, partial characterization, and covalent immobilization-stabilization of an extracellular α-amylase from Aspergillus niveus.Folia microbiologica · 2013Article
- Functional properties of a manganese-activated exo-polygalacturonase produced by a thermotolerant fungus Aspergillus niveus.Folia microbiologica · 2013Article
- Article
- Article
- Biotechnological Potential of Agro-Industrial Wastes as a Carbon Source to Thermostable Polygalacturonase Production in Aspergillus niveus.Enzyme research · 2011Article
- Purification and characterization studies of a thermostable β-xylanase from Aspergillus awamori.Journal of industrial microbiology & biotechnology · 2010Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The ability of xylanolytic enzymes produced by Aspergillus fumigatus RP04 and Aspergillus niveus RP05 to promote the biobleaching of cellulose pulp was investigated. Both fungi grew for 4-5 days in liquid medium at 40 degrees C, under static conditions. Xylanase production was tested using different carbon sources, including some types of xylans. A. fumigatus produced high levels of xylanase on agricultural residues (corncob or wheat bran), whereas A. niveus produced more xylanase on birchwood xylan. The optimum temperature of the xylanases from A. fumigatus and A. niveus was around 60-70 degrees C. The enzymes were stable for 30 min at 60 degrees C, maintaining 95-98% of the initial activity. After 1 h at this temperature, the xylanase from A. niveus still retained 85% of initial activity, while the xylanase from A. fumigatus was only 40% active. The pH optimum of the xylanases was acidic (4.5-5.5). The pH stability for the xylanase from A. fumigatus was higher at pH 6.0-8.0, while the enzyme from A. niveus was more stable at pH 4.5-6.5. Crude enzymatic extracts were used to clarify cellulose pulp and the best result was obtained with the A. niveus preparation, showing kappa efficiency around 39.6% as compared to only 11.7% for that of A. fumigatus.
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Registered trials
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