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 15 of 15 for “"Carbon Limitation"”.
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Carbon Limitation in Periphytic Algal Wastewater Treatment Systems
… algae may become limited by dissolved inorganic carbon. To test this hypothesis, this study characterized the effects of adding carbon dioxide to lab scale, recirculating wastewater algal treatment floways. Eight 61 cm x 121 cm x 5.1 cm (height x length x diameter) recirculating floways, lined …
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Structural and Functional Microbial Ecology of Denitrifying Bacteria Using Different Organic Carbon Sources
… microbial populations grown on different carbon sources. Specific objectives were to: 1) diagnose bacteria specifically assimilating methanol and ethanol and determine denitrification kinetics induced by the two carbon sources; 2) investigate factors leading to nitrous oxide (N₂O) and …
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Mathematical Modeling of Carbon and Light-Limited Algal Biofilms
A mathematical model of carbon and light limitation in algal biofilms was developed based on well-established fundamental descriptions of chemical, physical, and biological processes. The model considers carbon dioxide utilization and production from photosynthesis and respiration, diffusion of …
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Soil respiration, microbial respiration and mineralisation in soils of montane rainforests of Southern Ecuador: influence of altitude
… climate change in tropical forests on the global carbon budget are of principal interest in the recent research, as these forests amount to about 48 % of the world’s forested area. Interest has been focused on lowland tropical forests mainly, but tropical montane forests occupy about 20 % of all …
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Guanosine 5'-diphosphate 3'-diphosphate (ppGpp), guanosine 5'-diphosphate 3'-monophosphate (ppGp) and antibiotic production in Streptomyces clavuligerus
… fermentations. Clavulanic acid was produced in carbon- and nitrogenlimited continuous culture and in carbon- and phosphate-limited batch culture. Low levels of intracellular guanosine 5'-diphosphate 3'-diphosphate (ppGpp) were detected at D= 0.02 h' in continuous culture in all media. Low levels …
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An investigation into source and distribution of bromoform in the Southern African and Southern Ocean Marine boundry layer
… ) under different oxidative stresses. Carbon dioxide and nitrate limitation were induced as oxidative stresses. The mean per cell bromoform concentrations during the growth phase of the carbon limitation were 2.73 x 10¯¹⁷ and 8.68 x 10¯¹⁸ mol cell¯¹ for C. neogracile_cf and P. …
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Potential Impacts of Climate Change on Photochemistry of <i>Zostera Marina</i> L.
… for approximately 10% of the ocean’s total carbon storage, although photosynthesis of seagrasses is carbon limited at today’s oceanic pH. Therefore, increasing atmospheric CO<sub>2</sub> concentration, which results in ocean acidification/carbonation, is predicted to have a positive impact …
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Implications of Microcystin Production in Microcystis aeruginosa PCC 7806
… methods. RubisCO, the key enzyme for primary carbon fixation was a major microcystin interaction partner. High light exposition strongly stimulated microcystin-protein interactions. Up to 60 percent of the total cellular microcystin was detected bound to proteins, i.e. inaccessible for …
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Biofilm formation by Shewanella oneidensis MR-1 towards fundamental understanding of anode respiring communities
… on the anode, microorganisms oxidize complex carbon sources and reduce the electrode via complex mechanisms of extra-cellular electron transfer (EET). To date, Geobacter sulfurreducens has been identified as producing not only the largest current density but also large population density …
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Elucidating the bio-electrochemical mechanism of exoelectrogenesis of the cyanobacterium Synechocystis sp. PCC6803
… High light or rapidly changing light, iron limitation, carbon limitation and high salt stresses were tested. Evidence was found of exoelectrogenesis being in competition with CO2 fixation in response to immediate levels of inorganic carbon available, and of the putative competing charge …
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Bacterial communities in glacier forefields of the Larsemann Hills, East Antarctica : structure, development & adaptation
… environmental constraints such as water or carbon limitation have a greater influence. Adapting the culturing conditions to the cold and oligotrophic environment, the number of culturable heterotrophic bacteria reached up to 108 colony forming units per gram soil and 148 isolates were …
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Aquatic macrophyte-derived biomarkers as palaeolimnological proxies on the Tibetan Plateau
… highly 13C-enriched biomass because of their carbon metabolism and it is therefore crucial for the interpretation of δ13C values in sediment cores to understand to which extent aquatic macrophytes contribute to the isotopic signal of the sediments in Tibetan lakes and in which way variations …
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Assimilatory sulfur metabolism in marine microorganisms
… (cell counts, bulk protein, particulate carbon and nitrogen), total uptake of radioactive sulfate, and the distribution of sulfur in major biochemical components (low molecular weight [L.M.W.], alcohol soluble protein, lipid, hot TCA soluble material, and residue protein) were monitored …
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The development and evaluation of engineering strategies to enhance microbial oil production for industrial applications
… oil sources such as the utilisation of various carbon sources for cultivation (including industrial wastes and by-products), high volumetric production and seasonally independent production. Large-scale microbial oil production has been successful for the production of high value oils such as …
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Energy metabolism in Arbidopsis thaliana: TCA cycle evolution, amino acids degradation and alternative pathways
… in non-cyclic flux mode due to diminishing of carbon skeleton the enter it making required that be fed by anauplerotic reactions. Therefore, amino acids become essential to support respiration and ATP synthesis under such situations. Compelling evidence have demonstrated that branched chain …