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 7 of 7 for “"Extracellular enzyme activities"”.
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The effects of fire and drought on plant-soil feedbacks of a nonnative invasive grass in southern Illinois
… soil organic matter pools, microbial biomass, extracellular enzyme activities, and soil respiration in stands invaded by the C4 exotic grass Microstegium vimineum. I used a manipulative field experiment conducted across two invaded sites with contrasting fire history to determine the effects of …
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Interactive effects of fire and grazing on soil and forage nitrogen dynamics in a tallgrass prairie
… autoclavable citrate-extractable (ACE) protein, extracellular enzyme activities, and forage quality (N concentration) across burn intervals, grazing regimes, and topographic positions. Results show that fire and grazing regulate distinct but interacting components of the N cycle. Infrequent fire …
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Microbial activity on wood in streams: exploring abiotic and biotic factors affecting the structure and function of wood biofilms
… Microbial respiration, fungal biomass, extracellular enzyme activity, and the effect of nutrient addition were used as descriptors of wood biofilms. Exclusion of leaf litter from a headwater stream enhanced extracellular enzyme activity, and fungal biomass was 7 times higher than that in …
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Effects of land management and climate change on soil microbial communities in Appalachian forest ecosystems
… influences, including present and past land use activities (e.g., logging, conversion to agriculture) and climate change (e.g., intensifying droughts). However, despite the central importance of microbial communities in promoting ecosystem functions, impacts of land management and climate change …
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Effects of land-use practice on wetland soil hydrology, salinity, and biogeochemistry in the prairie pothole region
… impact greenhouse gas (GHG) emissions and extracellular enzyme activities (EEAs). In a field experiment, the effects of SRW were evaluated by measuring the depth to GWT; groundwater and soil electrical conductivity (EC), nutrients (N, P, K, and S), and SOC content with different fractions …
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Pollution reduction with processed waste materials
… was evaluated through total dry matter and extracellular enzyme activities of both starch specific (α-glucosidase) and non-specific (β-glucosidase) substrate. The result showed that the effect of anthracene amendment alone was not highly significant on the process. However, the interaction …
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Virulence and pathogenic mechanisms of <i>Legionella pneumophila</i>
… proteins were found. The lipopolysaccharide and extracellular enzyme activities of the pairs of strains were indistinguishable. <br></br><br></br>The Corby strain of <i>L.pneumophila</i>(CV) was isolated from its intracellular <i>in vivo</i> environment and these bacteria compared with the same …