Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 24 of 24
Full-Text Articles in Physical Sciences and Mathematics
Predator-Prey Dynamics Between The Blue Crab: Callineates Sapidus Rathbun, And Juvenile Oysters Crassostrea Virginica (Gmelin), David B. Eggleston
Predator-Prey Dynamics Between The Blue Crab: Callineates Sapidus Rathbun, And Juvenile Oysters Crassostrea Virginica (Gmelin), David B. Eggleston
Dissertations, Theses, and Masters Projects
No abstract provided.
Investigation Of Tributyltin: Water/Sediment Interactions, Michael A. Unger
Investigation Of Tributyltin: Water/Sediment Interactions, Michael A. Unger
Dissertations, Theses, and Masters Projects
Tributyltin (TBT) and its degradation products dibutyltin (DBT) and monobutyltin (MBT) have been quantitatively analyzed in environmental water samples using gas chromatography with flame photometric detection and gas chromatography/mass spectrometry (GC/MS). The butyltins were extracted from environmental samples with hexane/0.2% tropolone and derivatized with hexyl magnesium bromide to form hexylbutyltins. Full scanning GC/MS was used for confirmation of peak identifications and quantification was done by selective ion monitoring (methane chemical ionization) at m/z 319 (TBT) and m/z 347 (DBT, MBT and tripentyltin, the internal standard). Calibration curves were linear and detection limits were less than 2 ngL&\sp{lcub}-1{rcub}&. GC/MS and GC …
Linked Beta-Cyclodextrins, Richard Desider Nemeth
Linked Beta-Cyclodextrins, Richard Desider Nemeth
Dissertations, Theses, and Masters Projects
No abstract provided.
An Assessment Of Tributyltin Contamination In Sediments And Shellfish In The Chesapeake Bay, Francois A. Espourteille
An Assessment Of Tributyltin Contamination In Sediments And Shellfish In The Chesapeake Bay, Francois A. Espourteille
Dissertations, Theses, and Masters Projects
No abstract provided.
Long Wave Generation By Wave Groups In The Nearshore, Jeffrey H. List
Long Wave Generation By Wave Groups In The Nearshore, Jeffrey H. List
Dissertations, Theses, and Masters Projects
This study investigates the forcing of leaky mode long wave by incident wave groups in the nearshore. Using both field and model data, two previously proposed generation models are evaluated: the bounded long wave of Longuet-Higgins and Stewart (1964), and the breakpoint-forced long wave of Symonds et al. (1982). New methods of parameterizing incident wave height modulations are proposed, including an amplitude time series and a clearly defined groupiness factor. Cross-correlations between observed amplitude and low frequency time series clearly document the release and shoreline reflection of a group-forced long wave. The shallow water amplification of the component identified as …
Distribution And Taxonomy Of Endolithic Algae Occurring In The Shells Of Crassostrea Virginica Throughout The Lower James River, Virginia, Ellen Pafford Snyder
Distribution And Taxonomy Of Endolithic Algae Occurring In The Shells Of Crassostrea Virginica Throughout The Lower James River, Virginia, Ellen Pafford Snyder
Dissertations, Theses, and Masters Projects
No abstract provided.
The Effects Of At-Sea Killing And Storage Methods On The Quality Of Recreationally-Caught Northern Bluefin Tuna, Thynnus Thynnus, Nancy Jeanne Chartier
The Effects Of At-Sea Killing And Storage Methods On The Quality Of Recreationally-Caught Northern Bluefin Tuna, Thynnus Thynnus, Nancy Jeanne Chartier
Dissertations, Theses, and Masters Projects
No abstract provided.
Assessing Environmental Stress On The Loggerhead Sea Turtle (Caretta Caretta) In Virginia Waters, Sarah A. Bellmund
Assessing Environmental Stress On The Loggerhead Sea Turtle (Caretta Caretta) In Virginia Waters, Sarah A. Bellmund
Dissertations, Theses, and Masters Projects
No abstract provided.
Seasonal Changes In Fecundity Of Oysters Crassostrea Virginica (Gmelin): From Four Oyster Reefs In The James River, Virginia, Carrollyn Cox
Seasonal Changes In Fecundity Of Oysters Crassostrea Virginica (Gmelin): From Four Oyster Reefs In The James River, Virginia, Carrollyn Cox
Dissertations, Theses, and Masters Projects
No abstract provided.
Cyclic Ether Synthesis Via Lewis Acid Promoted Carbon-Carbon Bond Forming Cyclization Reactions Of Unsaturated And Saturated Symmetric Acetals, Elizabeth Gonda
Cyclic Ether Synthesis Via Lewis Acid Promoted Carbon-Carbon Bond Forming Cyclization Reactions Of Unsaturated And Saturated Symmetric Acetals, Elizabeth Gonda
Dissertations, Theses, and Masters Projects
No abstract provided.
The Measurement Of Strong Interaction Effects In High-Z Sigma Hyperonic Atoms, William Clarke Phillips
The Measurement Of Strong Interaction Effects In High-Z Sigma Hyperonic Atoms, William Clarke Phillips
Dissertations, Theses, and Masters Projects
Strong-interaction effects have been observed in the X-ray spectra of atoms formed with {dollar}\Sigma\sp-{dollar} in lead and tungsten.;In the experiment, performed at the Alternating Gradient Synchrotron of Brookhaven National Laboratory, negative kaons were brought to rest in a novel laminar target consisting of thin sheets of high-Z material in a liquid hydrogen bath. The geometry of the target was designed to optimize the production of high-Z {dollar}\Sigma\sp-{dollar} atoms and the detection of their subsequent de-excitation X rays. A method of identifying the energetic {dollar}\pi\sp+{dollar} from the production reaction K{dollar}\sp-{dollar}+ p {dollar}\to\Sigma\sp- +\pi\sp+{dollar} resulted in a factor of 15 improvement in …
Statistically Constrained Decimation Of A Turbulence Model, Timothy Joe Williams
Statistically Constrained Decimation Of A Turbulence Model, Timothy Joe Williams
Dissertations, Theses, and Masters Projects
The constrained decimation scheme (CDS) is applied to a turbulence model. The CDS is a statistical turbulence theory formulated in 1985 by Robert Kraichnan; it seeks to correctly describe the statistical behavior of a system using only a small sample of the actual dynamics. The full set of dynamical quantities is partitioned into groups, within each of which the statistical properties must be uniform. Each statistical symmetry group is then decimated down to a small sample set of explicit dynamics. The statistical effects of the implicit dynamics outside the sample set are modelled by stochastic forces.;These forces are not totally …
The Synthesis Of Quinone-Capped Cyclodextrins, Michael Vernie Cossette
The Synthesis Of Quinone-Capped Cyclodextrins, Michael Vernie Cossette
Dissertations, Theses, and Masters Projects
No abstract provided.
Sedimentation And Its Role In The Nutrient Dynamics Of A Tidal Freshwater Marsh, Jane M. Ledwin
Sedimentation And Its Role In The Nutrient Dynamics Of A Tidal Freshwater Marsh, Jane M. Ledwin
Dissertations, Theses, and Masters Projects
No abstract provided.
Swimming Responses Of Larvae Of Three Mactrid Bivalves To Different Salinity Gradients, Bernardita Campos Maia
Swimming Responses Of Larvae Of Three Mactrid Bivalves To Different Salinity Gradients, Bernardita Campos Maia
Dissertations, Theses, and Masters Projects
No abstract provided.
The Influence Of Post-Settlement Mortality On Recruitment Patterns In A Soft-Bottom Habitat, Erick Christian Zobrist
The Influence Of Post-Settlement Mortality On Recruitment Patterns In A Soft-Bottom Habitat, Erick Christian Zobrist
Dissertations, Theses, and Masters Projects
No abstract provided.
Development, Test And Application Of A New Method Of Particle Shape Analyses Based On The Concept Of The Fractal Dimension, Adam Arthur Frisch
Development, Test And Application Of A New Method Of Particle Shape Analyses Based On The Concept Of The Fractal Dimension, Adam Arthur Frisch
Dissertations, Theses, and Masters Projects
Shape analysis methods based on the concept of the fractal dimension are emerging as a new method of quantifying complex particle shapes. The concept of the fractal dimension stems from the approximately linear relationship between the logarithm of the particle perimeter and the logarithm of the step length or unit of measure. as step length is shortened, the resulting particle perimeter is lengthened. The fractal dimension (D) is defined as 1 {dollar}-{dollar} b, where b is the slope of the log/log plot of perimeter against step length. Using two dimensional projected particle outlines measured by a video image digitizing system, …
Response Of A Partially Mixed Coastal Plain Estuary To Storm Events, Daniel Ary Hepworth
Response Of A Partially Mixed Coastal Plain Estuary To Storm Events, Daniel Ary Hepworth
Dissertations, Theses, and Masters Projects
No abstract provided.
Modes Of Longshore Variability In The Development Of A Bar-Trough Morphology, Rebecca Jo Savage
Modes Of Longshore Variability In The Development Of A Bar-Trough Morphology, Rebecca Jo Savage
Dissertations, Theses, and Masters Projects
No abstract provided.
Availability Of Lead, Zinc, Copper, And Cadmium To The Peregrine Falcon (Falco Peregrinus) From Waterfowl Of The Craney Island Disposal Area, Douglas Stephen Davis
Availability Of Lead, Zinc, Copper, And Cadmium To The Peregrine Falcon (Falco Peregrinus) From Waterfowl Of The Craney Island Disposal Area, Douglas Stephen Davis
Dissertations, Theses, and Masters Projects
No abstract provided.
Swash Induced Zonation Of A Foreshore Sediment Size Distribution, Mary Sue Jablonsky Moustafa
Swash Induced Zonation Of A Foreshore Sediment Size Distribution, Mary Sue Jablonsky Moustafa
Dissertations, Theses, and Masters Projects
No abstract provided.
The Development And Application Of A Helium Discharge Detector For Gas Chromatography, Margaret Laverne Ware
The Development And Application Of A Helium Discharge Detector For Gas Chromatography, Margaret Laverne Ware
Dissertations, Theses, and Masters Projects
No abstract provided.
Semantic Specification Using Tree Manipulation Languages, Randall Paul Meyer
Semantic Specification Using Tree Manipulation Languages, Randall Paul Meyer
Dissertations, Theses, and Masters Projects
Software tools are used to generate compilers automatically from formal descriptions of languages. Methods for specifying the syntax of languages are well-established and well-understood; however, methods for formal semantic specification are not. The method most commonly used for semantic specification is an attribute grammar.;This thesis examines an alternative method of semantic specification. TreeSem is defined as a Tree Manipulation Language applicable to semantic specification. A TreeSem program is easier to read and to write than a corresponding attribute grammar specification.;Algorithms for translation of a TreeSem program into an equivalent attribute grammar specification, and for translation of an attribute grammar specification …
The Effects Of Salinity On Cadmium Toxicity To The Bay Mysid, Mysidopsis Bahia Molenock, Peter F. De Lisle
The Effects Of Salinity On Cadmium Toxicity To The Bay Mysid, Mysidopsis Bahia Molenock, Peter F. De Lisle
Dissertations, Theses, and Masters Projects
The effects of salinity on cadmium toxicity to the bay mysid, Mysidopsis bahia Molenock were studied in a series of experiments examining salinity tolerance, effect of salinity on intermolt period, osmoregulatory capacity, interaction of salinity with acute cadmium toxicity, role of changes in cadmium speciation, modification due to calcium antagonism and effects of cadmium on osmoregulatory ability. Upper and lower tolerance limits increased with increasing acclimation salinity. Intermolt duration decreased slightly with increasing salinity. Mysidopsis bahia osmoregulates at salinities from 5 to 37&\perthous& and exhibits an isosmotic point of 24&\perthous&. Hemolymph osmolality attained steady-state condition by 95 min post-transfer to …