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 20 of 2494 for “"dissolved"”.
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Dissolved air (pressure) flotation
… influencing solids removal and thickening by dissolved-air (pressure) flotation and the criteria pertaining to the design of flotation tanks for solids removal and thickening. A review of pertinent literature on flotation is presented. The historical development of flotation is given together …
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The marine biogeochemistry of dissolved organic carbon and dissolved organic nutrients in the Atlantic Ocean
The marine biogeochemistry of dissolved organic carbon (DOC) has come under<br/>increased scrutiny because of its involvement in the global carbon cycle and<br/>consequently climate change. Dissolved organic nitrogen (DON) and phosphorus<br/>(DOP), which have historically been ignored because of …
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Aluminium stabilizes dissolved organic matter by precipitation
… by large Al concentrations. Precipitation of dissolved organic matter (DOM) by dissolved Al could contribute substantially to C retention in acidic forest soils. However, no information is available on the properties of precipitated organic matter (OM) and its stability against microbial decay …
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Rheology of molten polystyrene with dissolved gases
Dissolved gases in polymers behave as excellent plasticizers, reducing viscosity significantly through the chain dilution effect and the addition of free volume. Rheological measurements and theoretical modeling are presented for molten polystyrene with dissolved gases, including carbon dioxide, …
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Marine microbial production of dimethylsulfide from dissolved dimethylsulfoniopropionate
… pathway of DMS formation: microbial cleavage of dissolved (extracellular) DMSP. In laboratory studies, bacteria able to cleave DMSP to form DMS were isolated from seawater by a DMSP enrichment technique, and the kinetics of DMSP uptake and DMS production were examined closely in pure cultures of …
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Dissolved inorganic and particulate iodine in the oceans
Analytical methods have been developed for the determination of iodate, iodide and particulate iodine in sea water. Iodate is converted to tri-iodide and the absorbance of tri-iodide at 353 nm is measured. The precision of this method is ca. ±3%. Iodide is first separated from most other anions by …
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The marine biogeochemistry of dissolved and colloidal Iron
… and nitrogen acquisition in the open ocean. Dissolved iron (dFe) has extremely low concentrations in marine waters that can drive phytoplankton to Fe limitation, effectively linking the Fe and carbon cycles. Understanding the marine biogeochemical cycling and composition of dFe was the focus …
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Bioavailability of dissolved organic matter in coastal waters
Dissolved organic matter (DOM) is the largest reservoir of organic matter in the ocean containing the same amounts of carbon as atmospheric carbon dioxide. DOM consists of a mixture of compounds ultimately originating from terrestrial and aquatic plant, and microbial materials. The complex chemical …
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The Speciation of Dissolved Uranium in Marine Waters
… have been shown to remove variable amounts of dissolved organic matter as well.</p> <p>Although uranium is predicted to be in the inorganic form in marine waters, there is some indirect evidence to suggest that organic and colloidal uranium are present. Uranium is well known for its association …
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Non-Volatile Dissolved Organic Iodine in Marine Water
… phase, it was the species conversion among the dissolved forms which led to more or less non-conservative behavior of the individual species.</p>
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Marsh-Exported Dissolved Organic Matter Fate in Estuaries
<p>Dissolved organic matter (DOM) is a significant driver of estuarine productivity and nutrient cycling. The colored component of DOM, chromophoric dissolved organic matter (CDOM), impacts coastal optical properties, ocean color, and light attenuation. While marshes are largely considered sinks …
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The marine biogeochemistry of dissolved and colloidal iron
… and nitrogen acquisition in the open ocean. Dissolved iron (dFe) has extremely low concentrations in marine waters that can drive phytoplankton to Fe limitation, effectively linking the Fe and carbon cycles. Understanding the marine biogeochemical cycling and composition of dFe was the focus …
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Dissolved inorganic and particulate iodine in the oceans.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Biogeochemistry of dissolved free amino acids in marine sediments
Dissolved free amino acids (DFAA) were measured in interstitial water samples squeezed from sediments collected in a variety of depositional environments. These sediments were further characterized by measurements of total organic carbon, total nitrogen, dissolved organic carbon, total hydrolyzable …
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Microbial production and consumption of marine dissolved organic matter
… are the principal producers of oceanic dissolved organic matter (DOM), the organic substrate responsible for secondary production by heterotrophic microbes in the sea. Despite the importance of DOM in marine food webs, details regarding how marine microbes cycle DOM are limited, and few …
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The reactivity of ferric (hydr)oxides towards dissolved sulphide
… conditions, ferric (hydr)oxides are reduced by dissolved sulphide or by microorganisms. This reaction generates Fe(II) which may precipitate as iron hydroxide, adsorb to the ferric (hydr)oxide surfaces and transform the ferric (hydr)oxides into more stable minerals, or precipitate as iron …
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Buildup/Washoff Model for Dissolved Iron in Stormwater Runoff
… the calibration of the Buildup and Washoff for dissolved iron. The test site located at the intersection of the Interstate-10 and Interstate-610, New Orleans, Louisiana. Storm water runoff from the examined elevated roadway section was analyzed for 14 storm events. The model used a linear …
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Sorption and release of dissolved pollutants via bioretention media.
… the pH of the stormwater (7.2) and was only 28% dissolved in the influent, so a sorption capacity was not computed. Column studies using four different ratios of compost (0, 10, 30, and 50%, by volume) were conducted to develop metal breakthrough curves. The breakthrough curves for Cd and Zn were …
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