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.
Results
Showing 1 to 20 of 64 for “"water exchange"”.
-
Sediment-water exchange of polycyclic aromatic hydrocarbons in the lower Hudson Estuary
… hydrophobic organic contaminants (HOCs) between water and polyethylene, were shown to be useful for the measurement of dissolved HOCs like polycyclic aromatic hydrocarbons (PAHs) in natural waters. These PEDs allow for the measurement of the fugacity or "fleeing tendency" of such chemicals in …
-
Modulation Of Water-Exchange Rates Of Lanthanide(iii)-Containing Complexes Using Polyethylene Glycol
<p> <strong>MODULATION OF WATER-EXCHANGE RATES OF LANTHANIDE(III)-CONTAINING COMPLEXES USING POLYETHYLENE GLYCOL</strong> </p> <p>by</p> <p> <strong>BUDDHIMA N. SIRIWARDENA-MAHANAMA</strong> </p> <p> <strong>May 2014</strong> </p> <p> <strong>Advisor:</strong> Dr. Matthew J. Allen</p> <p> …
-
The impact of climate change on air-water exchange of toxaphene in Lake Superior
… dominates year-round across the air-water interface, making Lake Superior an indirect source of toxaphene to the atmosphere.
-
Water repellency effects on liquid- and vapor-phase water exchange in soil and clay minerals
Drought conditions and wildfires can induce soil water repellency. Precipitation shifts are expected to exacerbate drought and wildfire in regions such as the southeastern United States, making it critical to understand how repellency affects water exchange processes in soil. The objectives of this …
-
Assessment of Ground Water Exchange in Two Stream Channels and Associated Riparian Zones, Jocko Valley, Western Montana
… M.S., December 2006 Geology Assessment of Ground Exchange in Two Steam Channels and Associated Riparian Zones, Jocko Valley, Western Montana Chairperson: William W. Woessner Degraded riparian habitat is a concern throughout the United States. Repairing anthropogenic damage to river channels and …
-
Assessment of Ground Water Exchange in Two Stream Channels and Associated Riparian Zones, Jocko Valley, Western Montana
… M.S., December 2006 Geology Assessment of Ground Exchange in Two Steam Channels and Associated Riparian Zones, Jocko Valley, Western Montana Chairperson: William W. Woessner Degraded riparian habitat is a concern throughout the United States. Repairing anthropogenic damage to river channels and …
-
Groundwater-surface water exchange within montane and alpine regions of the Front Range and Rocky Mountains, Colorado
… to occur in dry regions of the world, surface-water and groundwater availability is likely to decrease, and water quality will be negatively impacted. Characterizing how excess nutrients and pollutants are naturally removed via groundwater and surface water exchange is a great topic of interest …
-
Novel mechanisms of DC and kilohertz electrical stimulation
… brain slice, 2) study the effect of tDCS on water exchange rate across the blood-brain barrier using an advanced MRI imaging technique in a healthy population to investigate effect of tDCS stimulation on neurovascular units.</p> <p>The neuronal membrane has a well-established low pass …
-
Regulation of Seat-patch Water Potentials in Anurans
Decades of research on water exchange in frogs have assumed that blood osmotic potential drives water uptake. However, more recent reports have suggested an intermediate control of the water potential partially separate from the osmotic potential of blood. Some reports have speculated that …
-
IoT and machine learning approach for the determination of optimal freshwater exchange rate in aquaponics
… resource efficiency. Due to constraints in land, water, and energy availability, controlled environment production systems such as aquaponics are gaining attention as integrated approaches to producing fish and plants. While aquaponics is widely recognised for its efficient water reuse, recent …
-
Use Of 17o-Nmr Spectroscopy To Study The Coordination Chemistry Of Trivalent Lanthanide Ions In Solution
… the number of coordinated ligands and ligand-exchange rates. The coordination numbers for water molecules bound to Eu3+ and Tb3+ have been studied by luminescence-decay measurements; however, the coordination numbers of other important oxygen-containing functional groups such as ketones, …
-
The climatic significance of tropical forest edges and their representation in global climate models
… clearance of tropical humid forests influence water exchange between remnant forest patches and the atmosphere, and, if so, how this affects regional and global water exchange. Fieldwork presented in this thesis ascertains whether the amount of water transferred to the atmosphere from a humid …
-
Using temperature profiles to investigate the hyporheic zone in an agricultural drainage ditch
… decades, there has been much research on ground water/surface water interaction and hyporheic zone processes in natural rivers and streams. Research into natural systems has revealed significant ground water/surface water interaction and a complex variability that depends primarily on surface …
-
Studies On The Physicochemical Properties Of Eu2+ Cryptates: Implications To Contrast Agents For Magnetic Resonance Imaging
… is decreased considerably. Because of the slow water-exchange rate of most Gd<sup>3+</sup>-containing complexes (∼;10<sup>6</sup> s<sup>-1</sup>), I used Eu<sup>2+</sup> instead of Gd<sup>3+</sup> and adapted the ligand modification strategies that have been used for Gd<sup>3+</sup>-containing …
-
Air-water transfer at wavy interfaces
Gas-water exchange is usually controlled by a thin surface layer in the liquid just beneath the interface. The structure and dynamics of the interface profoundly influence the rate of mass transfer. Of particular importance to environmental and climatical cycles is the large (3 to 5 fold) …
-
The effect of breaching on coastal pond water quality
… is used as a management strategy to improve water quality and reduce the frequency of harmful algal blooms (HABs) in many New England coastal ponds. At Sesachacha Pond, on Nantucket Island, MA, breaching currently is conducted twice annually with the goal of flushing eutrophic pond water and …
-
River oxygen uptake by benthic microorganisms
… high values imply that a high rate of sediment-water exchange was sustained by turbulent mass transfer processes rather than molecular diffusion. Benthic biomass values by ATP extraction ranged from 0.67-4.95 μg ATP cm⁻³, with higher maximum values for the rivers studied than have been reported …
-
The cultivation of Ulva lactuca (chlorophyta) in an integrated aquaculture system, for the production of abalone feed and the bioremediation of aquaculture effluent
… capacity to absorb nutrients and thus improve water quality of the aquaculture effluent. Results show that abalone effluent medium alone is insufficient for seaweed cultivation. Turbot effluent media has far more nutrients for seaweed but turbidity due to incomplete turbot feed pellet …
-
Evaluation of ozone treatment, pilot-scale wastewater treatment plant, and nitrogen budget for Blue Ridge Aquaculture
… by availability of high quality replacement water. I developed a pilot-scale wastewater treatment system to treat and reuse effluent presently discharged. An initial study was conducted to determine the response of the BRA waste stream to ozone application. Dosages of 6.9, 4.8 and 2.4 g O3 …
-
Water circulation within Tomales Bay, California, U.S.A. : a Mediterranean climate estuary
… U.S.A. Research on terrigenous inputs, air-sea exchange, sediment-water exchange, ocena-bay exchange and internal cycling in estuaries was conducted. This thesis addresses the ocean-bay exchange section in identifying and describing the estuarine water circulation and its variability, both …
Page 1 of 4