Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"cellulose degradation"”.
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Impact of Oxygen and Pesticides on Microbial Cellulose Degradation in Aerated Agricultural Soils: A Microscaled Analysis of Processes and Prokaryotic Populations
The polysaccharide cellulose is a major component of organic matter in terrestrial ecosystems and its mineralization drives carbon fluxes in soil. The degradation of plant-derived saccharides (e.g., cellulose, cellobiose, and glucose) is catalysed by a huge diversity of aerobic and anaerobic …
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Impact of lignification of corn stover fractions on cell wall degradation by rumen microorganisms and response to ammonia treatment
Changes in cell wall composition and in vitro degradation of corn stover fractions (leaf, upper stem and lower stem) with advancing maturity and in response to NH; treatment were determined, and possible inhibitory mechanisms of lignin were evaluated. With advancing maturity, IVDMD decreased …
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Effects of Methyl Cellulose on the Cellulolytic Bacterium, Ruminococcus Flavefaciens (Rumen, Anaerobe)
Cellulose degradation by Ruminococcus flavefaciens and other ruminal cellulolytic bacteria was strongly inhibited by highly substituted methyl celluloses (degree of substitution > 1.5 and mol wt > 12,000). The inhibitory response was concentration dependent with 0.1% (wt/vol) or methyl cellulose …
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The electrochemical mediation of oxygen delignification of pulp with a manganese polyol complex
… not significantly enhance the delignification or cellulose degradation reactions in factorial experiments at 20 °C or 90 °C. At 20 °C it is believed that increased peroxide stability prevented the delignification and cellulose degradation reactions. The formation of free radical species being …
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Effect of surface modifications on biodegradation of nanocellulose and microbial response
… on in product development. In particular, nanocellulose is touted as a promising green nanomaterial, as it is sourced from an effectively inexhaustible feedstock of wood-based cellulose and is assumed to be harmless to the environment since it is derived from a natural material and assumed to …
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Electrochemically mediated oxygen bleaching of pulp
… the ratios of the decrease in lignin content and cellulose degradation to ferricyanide consumption, were executed. In these experiments, five process variables; current, oxygen pressure, pH, temperature, and time, were investigated. Extensive experiments with the ferri/ferrocyanide reactant system …
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Molecular mechanisms behind the adjustment of phototrophic light-harvesting and mixotrophic utilization of cellulosic carbon sources in Chlamydomonas reinhardtii
… of different families, known to be involved in cellulose- and hemicellulose degradation, even though the cell wall of this alga does not contain cellulose and is solely composed of hydroxyproline-rich glycoproteins. This work characterizes the capability of C. reinhardtii for cellulose …
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The Effect of Temperature on Lignin Degradation in Municipal Solid Waste
… Typically paper consists of 79% to 98% of lignocellulose which is considered to be the most abundant source of natural carbon on earth. Lignocellulose decomposition depends on the association of biodegradable cellulose and hemicellulose with lignin. Lignin is a recalcitrant material which …
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Messa a punto di processi biotecnologici per la produzione di biocombustibili da matrici organiche di rifiuto
… occurring microbial populations in the pollutant degradation activity. So, while confirming the potential of anaerobic digestion for the biomethanization of sewage sludges, this work proved the effectiveness of this technology in the removal of pollutants too. Moreover, since the degradation of …
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The Growth of Streptomycetes and Fungi Under Controlled Conditions on the Surface of Coated Materials
… streptomycete colonisation of wheat starch and cellulose substrates to be studied. The apparatus permitted simultaneous production of seven humidities and avoided a decrease in the oxygen-carbon dioxide ratio, giving conditions more akin to those encountered during the service life of a textile. …
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Purification and characterisation of novel recombinant β-glucosidases from aspergillus with application in biofuel production
… and endoglucanase thereby increasing the rate of cellulose degradation to fermentable sugars. A total of 166 proteins were identified as β-glucosidases after manual BLASTp search on the Aspergillus comparative database from eight species. Evidence for Horizontal Gene Transfer (HGT) of bacterial …
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Interfacial modulation of protein function explored through atomistic molecular dynamics simulation
… also discussed. Interactions at the interface of cellulose have also been simulated. The impact of lytic polysaccharide monooxygenase (LPMO) action on cellulose structure and potential product inhibition of cellulose degrading enzymes by oxidized cellulose were monitored while on practicum at the …
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EVALUATION OF CELLULOLYTIC ENZYMES FROM A NEWLY ISOLATED BREVIBACILLUS SP. JXL; AND OPTIMIZATION OF COSLIF PRETREATMENT VARIABLES OF SWEET SORGHUM BAGASSE USING A RESPONSE SURFACE METHOD
… a broad range of carbohydrates including: cellulose, carboxymethylcellulose (CMC), xylan, cellobiose, glucose, and xylose. In two different media supplemented with crystalline cellulose and CMC at 57°C under aeration, strain JXL produced a basal level of cellulases as FPU of 0.02 IU/ml in …
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Effect of liquid waste addition on the overall performance of anaerobic bioreactor landfill
… conditions to determine their effect on degradation of organics. The addition of buffer chemicals was found to improve degradation compared to data from an earlier study done without the addition of initial buffering. Paint waste with a COD 237,500 mg/L added at a concentration of 10% did …