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 18 of 18 for “"Interstitial water"”.
-
Sediment and Interstitial Water Toxicity to Freshwater Mussels and the Ecotoxicological Recovery of Remediated Acid Mine Drainage Streams
… and most diverse assemblages of native freshwater mussels. This region of the country also has historically and continues to be a major source of coal for the United States. Numerous experiments were carried out in an attempt to determine what ecotoxicological effects these activities have …
-
The science behind Tenax extractable concentrations and their use in evaluating environmental risk
… freely dissolved chemical concentration in the interstitial water, thus correcting exhaustive extractable concentrations for the sorbing phase of sediments. Organic carbon normalization often fails, however, to accurately reflect exposure as other environmental variables (i.e. organic carbon …
-
Development of Mechanical Optical Clearing Devices for Improved Light Delivery in Optical Diagnostics
… constituent chromophores, including cells, water, blood, and protein structures. Tissue optical clearing is a recent area of study within biomedical optics and photonics, where chemical agents have been used to alter tissue optical properties, reducing optical absorption and scattering and …
-
Processes and community structure in microbial biofilms of the River Elbe: relation to nutrient dynamics and particulate organic matter
… zone, as dissolved oxygen in the flowing water varied seasonally and diurnally due to the photosynthetic activity of the algae and infiltrated in the hyporheic zone. The second aspect was the investigation of advective transport of algal cells through porous media. In laboratory columns …
-
Anode Material Testing for Marine Sediment Microbial Fuel Cells
… and a cathode that is held in the overlying water column. The process of electron transfer to the anode is catalyzed by anaerobic bacteria in the sediment. The anaerobic bacteria have that are able to catalyze the electron transfer have been termed exoelectrogenic. The increase in scientific …
-
Dense Collagen Materials and the Modulation of Fibrillogenesis for Tissue Engineering
… absorptive-deformation process removes interstitial water from neutralised type I collagen in a single step, concentrating the matrix more than twenty-fold, axially aligning fibrils and producing mechanically robust constructs. Shaped in a conical mould, the method yields seamless tubes …
-
SYNTHESIS, CHARACTERIZATION, AND THERMAL INVESTIGATION OF METAL PHOSPHITES AND POTENTIAL IMPLICATIONS FOR ASTROBIOLOGY
… geochemical modeling of phosphite minerals. Interstitial water was revealed to be the primary oxidant of metal phosphites and was retained in samples to high temperatures (>500°C). These results could explain the low abundance of phosphite in rock records over geologic timescales. Potential …
-
Biogeochemistry of dissolved free amino acids in marine sediments
… 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 …
-
Toward improved drug discovery against flexible protein targets: an exhaustive study of glutamate racemase conformational dynamics, ligand binding, and catalysis
… induced by ligand binding, and the role of interstitial water. The results of the second two projects then feed back into our in silico methods in order to improve our capacity to predict small molecule binders of glutamate racemase. Much of the knowledge detailed here can be applied to …
-
Molecular Structure and Thermodynamics of CO<sub>2</sub> and Water Adsorption on Mica
The adsorption of CO2 and water on clay surfaces plays a key role in applications such as gas storage in saline aquifers and depleted hydrocarbon reservoirs but is not yet fully understood. Here, the adsorption of CO2 and water vapor is studied using Grand Canonical Monte Carlo and molecular …
-
Abiotic and biotic factors influencing the decline of native unionid mussels in the Clinch River, Virginia
… are coupled with unionid declines throughout the watershed. In many reaches of the Clinch River, mussel populations exist which fail to show recruitment suggesting that this is the weak link in the complex life cycle. Two possible factors which could endanger the sensitive juvenile stage are the …
-
Evaluation of Passive Reduction of Salts and Nutrients from Greenhouse Effluent using Vegetated Bioreactors
… of this effluent can threaten the quality of our waters, while recycling it for repeated irrigation in greenhouses could reduce costs and save on water and nutrient resources. However, the crop damage caused by the accumulated salinity in the recirculation systems is a major drawback to this …
-
Probing the effect of microstructure on water diffusion in engineered or biological materials with MRI
Water diffusion within skeletal muscles is a complex mass transport process due to the presence of barriers at multiple scales and the anisotropic structure of muscles. Magnetic Resonance Imaging (MRI) is an effective non-invasive technology for studying water transport in biological or engineered …
-
La comunità macrozoobentonica come strumento per la valutazione dello stato di qualità ecologico in ambienti di transizione: il caso della laguna di Santa Gilla
… et al., 2000). Recent directives, specifically Water Framework Directive 60/2000/EC and Marine Strategy Framework Directive 56/2008/EC, suggest that biological elements are essential tools to evaluate the quality of coastal and transitional ecosystems. In particular, the macrozoobenthic …
-
Use of an environmentally realistic laboratory test organism and field bioassessments to determine the potential impacts of active coal mining in the Dumps Creek subwatershed on the Clinch River, Virginia
… techniques. Analysis of sediments and interstitial water (porewater) indicate higher concentrations of trace metals in samples from sites located above both a power plant (CRP) and Dumps Creek mining influences. The furthest sampling site located near Pounding Mill, Virginia (CR-PM) had …
-
The postglacial sedimentology of Devils Lake, North Dakota
… is a result of high super saturation of lake water during periods of active phyto-plankton photosynthesis. High-magnesian calcite and aragonite are precipitated directly from the lake water; they account for 60 percent of the carbonate material deposited in Devils Lake. Biologic productivity …
-
The role of colloidal organic matter in the marine geochemistry of PCB’s
… of PCBs with colloidal organic matter in seawater, and the influence of this process on the distribution of PCBs in coastal sediments. Laboratory and field experiments were used to make quantitative estimates of PCB-organic matter sorption, and to test predictions of three-phase equilibrium …
-
Synthesis and Characterization of Metal-Organic Frameworks Organized by the Strong π...π Stacking 1,8-Naphthalimide Synthon
… coordinated to two κ 1-carboxylate ligands, two water molecules, and one end each of two 4,4’-bipyridyl ligands in a distorted octahedral environment, with each ligand oriented in a trans arrangement. They all have homochiral, helical, supramolecular metal organic framework three-dimensional …