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 8 of 8 for “"Redox condition"”.
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OXIDE FILM FORMATION AND CONVERSION MECHANISM ON CARBON STEEL UNDER MILDLY BASIC CONDITIONS
… and hence, its kinetics depends on the aqueous redox condition and the physical and chemical nature of surface oxide formed during corrosion. Nuclear plant environment includes the additional challenge of fields of ionizing radiation that can affect the redox conditions in solution. To develop a …
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CHEMICAL AND PHYSICAL ANALYSIS OF LAMINATED SEDIMENT FORMED IN LOE POOL, CORNWALL
… are investigated and evidence for their conditions of formation are presented. In all sediment analysed the combustion residue was greater than 80%, and in the black and grey annually-laminated sediment the organic matter was less than 3%. This indicated that the sediment was dominated by …
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Light-Harvesting, Redox Control, and Biomimicry of the Photosynthetic Antennas of Green Sulfur Bacteria
… modulation of efficiency with respect to redox condition. One or both of the redox-sensitive cysteine residues in the protein, situated near BChl a #'s 2 and 3 modulate their redox state between free thiol and thiyl radical form to quench BChl excitations, probably via an electron …
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Studying Redox Conditions of Devonian and Neoproterozoic Oceans Using I/ca Proxy From Bulk Carbonate Rocks
… an important trace element in biogeochemical and redox reactions. It has a nearly consistent concentration of ~0.46 μmol/L in the seawater and the inorganic speciation (IO3− and I−) of iodine is primarily controlled by redox conditions in water columns. Iodate (IO3−), not iodide (I−), is the only …
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The influence of redox dynamics on nitrogen cycling and nitrous oxide emissions from soils
… is directly linked to dissolved oxygen and to redox potential, which regulate microbial metabolism and chemical transformations in the environment. The relationship between soil moisture and N2O is usually based on incubations of soil at different soil moisture levels. Few studies have focused …
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Developing iodine proxies for oceanic oxygenation conditions during greenhouse episodes
… water column oscillated between generally oxic conditions and local/global anoxia remains a challenging question, exacerbated by a lack of sensitive redox proxies, especially at the interface between oxic and anoxic conditions. To address this problem, I use I/Ca in bulk carbonate and I/TOC in …
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Using Emerging Methods to Investigate Stream and Groundwater Interaction at Multiple Spatial Scales
… these samples for several conservative and redox-sensitive solutes. The results revealed strong correlation between vertical flux magnitude and the degree to which hyporheic water was "oxic-stream-like" or "anoxic-reduced". Residence time along hyporheic flowpaths was found to be a dominant …
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Fate of 17α-Estradiol, 17β-Estradiol, and Estrone in Agricultural Soils and Sediments
… sulfate-reducing, and methanogenic conditions. For all degradation studies, sterile controls were used to discern between biotic and abiotic transformations. Water, soil, and sediment extracts were analyzed for hormones using negative electrospray ionization tandem mass spectrometry. …