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Dispersal And Management Of Invasive Aquatic Plants In Mississippi Waterways, Amanda Louise Fernandez
Dispersal And Management Of Invasive Aquatic Plants In Mississippi Waterways, Amanda Louise Fernandez
Theses and Dissertations
To understand the flow of water as a factor that influences aquatic vegetation communities and aquatic plant dispersal, custom-made Global Positioning System (GPS) drones were used to monitor the movement of water in Aliceville Lake, Columbus Lake, and Ross Barnett Reservoir, MS. In each reservoir, the drones drifted in the wind-generated surface current. Analysis of wind speeds suggests that a certain wind speed may be necessary to overcome gradient flow. Wind direction and wind speed should be incorporated in future spatial simulation models for aquatic plant dispersal and distribution. An herbicide evaluation on Cuban bulrush (Oxycaryum cubenese) was conducted to …
Evaluation Of Quantitative Polymerase Reaction And Microbial Volatile Organic Compounds To Determine Resistance To Aspergillus Flavus In Maize, Alicia Kay Wood-Jones
Evaluation Of Quantitative Polymerase Reaction And Microbial Volatile Organic Compounds To Determine Resistance To Aspergillus Flavus In Maize, Alicia Kay Wood-Jones
Theses and Dissertations
Screening for resistance to Aspergillus flavus and aflatoxin contamination in maize is an ongoing effort by universities, state and federal agencies. We evaluated two techniques to screen for resistance; quantitative polymerase reaction (QPCR) and solid-phase microextraction (SPME). Methods were adapted to accurately detect and quantify the fungus in culture and in the vegetative stage of plant tissues. These assays can eliminate microbiological techniques. The primary objectives of the study were to utilize 1) QPCR to detect and quantify fungal biomass in maize stem tissues to evaluate resistance in maize genotypes to A. flavus colonization in situ and in vivo and …
Algal Biodiesel Production Via Extractive-Transesterification Using Microwave And Ultrasound Irradiation, Edith L. Martinez-Guerra
Algal Biodiesel Production Via Extractive-Transesterification Using Microwave And Ultrasound Irradiation, Edith L. Martinez-Guerra
Theses and Dissertations
This study presents the use of non-conventional methods such as microwaves and ultrasound for algal biodiesel production. Dry algae biomass (Chlorella sp.) was used as feedstock to evaluate three novel single-step extractive-transesterification methods: 1) microwave irradiation with ethanol as solvent/reactant; 2) microwave irradiation with ethanol as reactant and hexane as solvent and 3) ultrasound irradiation with ethanol as solvent/reactant, all catalyzed by sodium hydroxide catalyst. The three novel methods were compared with the conventional Bligh and Dyer method which followed a two-step extraction and transesterification process. The maximum lipid yields for microwave, microwave with hexane, ultrasound, and Bligh and Dyer …
An Assessment Of Human Vulnerability To Prolonged Cold In The Zeravshan Valley Of Tajikistan, R Bryson Touchstone
An Assessment Of Human Vulnerability To Prolonged Cold In The Zeravshan Valley Of Tajikistan, R Bryson Touchstone
Theses and Dissertations
The Central Asian country of Tajikistan is the poorest of the former Soviet republics; it is also prone to a plethora of natural hazards including mass wasting, flood, and extreme temperature. This thesis seeks to characterize how vulnerable rural Tajik mountain communities are to prolonged cold. The primary focus was in Navobod, in the Zeravshan Valley of Tajikistan, where semi-structured interviews were conducted with 31 households, the village leader and doctor, and school staff. The results from the interviews were compared with GIS analysis of the region. Interviews indicated that the area is highly vulnerable to the impacts of prolonged …
Analysis Of Humeral And Femoral Cross-Sectional Properties At Morton Shell Mound (16ib3), Sarah Marie Zaleski
Analysis Of Humeral And Femoral Cross-Sectional Properties At Morton Shell Mound (16ib3), Sarah Marie Zaleski
Theses and Dissertations
Using the concept of bone functional adaptation, this study analyzes femoral and humeral cross-sectional properties of human skeletal materials from Morton Shell Mound on the Louisiana coast. This work helps fill a gap in such analyses in the southern U.S. and contributes to an understanding of the functional adaptation of the human skeleton. Properties were compared to those of other prehistoric Southeastern fisher-hunter-gatherers from Gold Mine, Plash Island, and several Georgia coast sites to assess mobility and activity patterns among inland and coastal groups. Less sexual dimorphism of femoral midshaft shape among coastal Morton and Plash, compared to inland Gold …
System Dynamics Simulation Model Of Salmonella Contamination Of Broiler Carcasses In The Chill Tank Of A Poultry Processing Plant, Karen Dazo Galarneau
System Dynamics Simulation Model Of Salmonella Contamination Of Broiler Carcasses In The Chill Tank Of A Poultry Processing Plant, Karen Dazo Galarneau
Theses and Dissertations
Salmonella has been studied and researched for more than a hundred years and yet it remains a problem for human and animal health. The goal of this dissertation was to apply the systems thinking approach to Salmonella contamination and develop a System Dynamics (SD) simulation model for Salmonella contamination in the chill tank of a poultry processing plant. But first the appropriate carcass rinse sampling method that would not impact on the resulting Salmonella contamination status of the broiler carcass was studied. Kappa agreement analysis was used to evaluate three sampling methods. The adjacent rinse method was found to be …
Population-Level Genetic Structure Of Acmispon Argophyllus On The Channel Islands Of California, Gregory Lawrence Wheeler
Population-Level Genetic Structure Of Acmispon Argophyllus On The Channel Islands Of California, Gregory Lawrence Wheeler
Theses and Dissertations
The California Channel Islands present an ideal system in which to study unique biogeographical patterns seen in island systems near a mainland source, where spatial barriers are likely to limit gene flow without disrupting it completely. The islands also harbor a number of endemic taxa, suggesting that isolation from the mainland may be strong for some taxa. For this study, Acmispon argophyllus, a legume species found across five of the eight islands as well as on the mainland was used to test hypotheses at three spatial scales. Northern island populations have diverged into what potentially represents a new species; populations …
Quality Of Corn Silage Inoculated With L. Buchneri And P. Pentosaceus, Kellie Nichole Kaletsch
Quality Of Corn Silage Inoculated With L. Buchneri And P. Pentosaceus, Kellie Nichole Kaletsch
Theses and Dissertations
Microbial inoculants are forage additive products that contain viable bacteria and sometimes a combination of enzymes. Bacterial inoculants are used primarily for two reasons; first to gain rapid fermentation and second to decrease or inhibit spoilage. Inoculants work by shifting the fermentation of forage crops. The shift of fermentation causes preservation of nutrients, dry matter (DM) and occasionally increases animal performance. Most inoculants contain lactic acid producing bacteria to aid in shifting fermentation to lactic acid and away from acetic acid and ethanol production; however some inoculants aid in aerobic stability enhancement by production of acetic acid.. Although most inoculants …
Certain Agave Species Exhibit The Capability To Be Moderately Productive Under Conditions Of High Salt And Drought Stress, Steven J. Bergsten
Certain Agave Species Exhibit The Capability To Be Moderately Productive Under Conditions Of High Salt And Drought Stress, Steven J. Bergsten
Theses and Dissertations
Water availability and arable lands are increasingly limiting resources in many parts of the U.S., particularly in semi-arid and arid regions. As a means of addressing food and fuel demands associated with burgeoning population growth, highly productive and water-use efficient crops need to be identified. One potential crop, Agave, merits consideration and evaluation due to its putative capability to provide sustenance and energy despite growing in water-limited regions and on marginal soils. However, little is known regarding the productivity these succulent plants will have under growing conditions of the Southwest, where high concentrated saline soils are abundant, and water is …
Computational And Experimental Study Of Degeneration, Damage And Failure In Biological Soft Tissues, Gregory Allen Von Forell
Computational And Experimental Study Of Degeneration, Damage And Failure In Biological Soft Tissues, Gregory Allen Von Forell
Theses and Dissertations
The purpose of this work was to analyze the biomechanics of degeneration, damage, and failure in biological soft tissues both experimentally and computationally to provide insight into tendon or ligament tearing, tendo-achilles lengthening and lumbar spine dysfunction. For soft tissue tearing, experimental studies for calculating fracture toughness were performed and determined that tendons and ligaments are able to completely resist tear propagation. For tendo-achilles lengthening, a damage model was developed to mimic the behavior of the lengthening that occurs as a result of the percutaneous triple hemisection technique. The model provided insight for predicting the amount of lengthening that occurs …
Real Time Monitoring Of Surface Chemical Events By Streaming Potentials In Microfluidic Channels, Kenji Nokura
Real Time Monitoring Of Surface Chemical Events By Streaming Potentials In Microfluidic Channels, Kenji Nokura
Theses and Dissertations
Zeta potential is one of the tools to measure the surface charge of materials, and Alvarez et al. have developed a microchannel device to measure zeta potentials in real time for label-free sensing using immobilized receptors on microchannel surfaces. However, the challenge has been the charge interference of surface modifiers on analyte detection. Therefore, it was necessary to find the best strategy to regenerate minimal surface charge after modifying the channel with polymer films that would anchor the affinity groups for the analyte. It was demonstrated that adsorption of positively and negatively charged analytes were monitored via real time zeta …
Materials And Meaning, Michael Corigliano
Materials And Meaning, Michael Corigliano
Theses and Dissertations
Decisive moments and their fleeting experiences are born from an individual’s interaction within a defined physical space. It is here at the intersection of environment and context that my work in site-specific art begins. I endeavor to create an examination of socio-political and environmental issues through a manipulation of materials, thereby altering one’s private, communal, and cultural response to them. My installations are comprised of slip casted multiples which reference the human form. I place these forms in galleries and specific exterior locations, and incorporate materials that are charged with societal discord, such as used motor oil and post-consumer detritus, …
A "Time-Conscious" Christmas Carol, Jack Lundquist
A "Time-Conscious" Christmas Carol, Jack Lundquist
Theses and Dissertations
Shortly after Charles Dickens's A Christmas Carol was released in 1843, a tradition of adaptation began which has continued seemingly unabated to the present day. Consequently, the tale has become so widely known that one is arguably as likely to have first encountered the iconic miser Scrooge through any number of audio-visual adaptations as through the original work itself. Significant critical attention has been paid to the nature of Scrooge's drastic change from miser to philanthropist. Many would argue that the change, happening both literally and figuratively overnight, is not representative of a genuine psychological transformation. On Christmas day, 2010, …
Understory Vegetation Response To Mechanical Mastication Of Piñon And Juniper Woodlands, Jordan Ann Bybee
Understory Vegetation Response To Mechanical Mastication Of Piñon And Juniper Woodlands, Jordan Ann Bybee
Theses and Dissertations
Piñon and juniper encroachment and infilling can alter ecosystem processes and decrease resilience and resistance in sagebrush grasslands. Land managers employ a variety of techniques to eliminate these trees and mitigate their negative effects. Mechanical mastication or shredding is an increasingly popular method of removing these trees in Utah. It is a versatile treatment that can reduce canopy fuels, increase infiltration, and reduced sediment loss. We compared vegetation cover for annual and perennial vegetation functional groups on shredded and adjacent unshredded areas across a range of sites. Our approach was to categorize sites by ecological site type (encroachment or tree) …
Remembering The Haitian Revolution Through French Texts: Victor Hugo's Bug-Jargal And Alphonse De Lamartine's Toussaint Louverture, Irene Joyce Kim Stone
Remembering The Haitian Revolution Through French Texts: Victor Hugo's Bug-Jargal And Alphonse De Lamartine's Toussaint Louverture, Irene Joyce Kim Stone
Theses and Dissertations
The Haitian Revolution was the first successful slave revolt in history. And even though Haiti declared independence from France in 1804, most French civilization textbooks do not include this important event. From an economic standpoint, France depended on its imports from Saint-Domingue (Haiti's pre-revolutionary name); and from a philosophical standpoint, the slave revolt in Saint-Domingue originated from ideas that came from French philosophers preaching the Rights of Man. Studying the Haitian Revolution within the context of the French Revolution provides a perspective that highlights the complex relationship between France and its colonies as well as religion's displaced role after 1789. …
The Response Of Naive Channel Catfish To Chemical Cues Associated With Predation, Marinda Coulter
The Response Of Naive Channel Catfish To Chemical Cues Associated With Predation, Marinda Coulter
Theses and Dissertations
The chemosensory abilities of fishes, are important in order to understand how prey can perceive and avoid predators. Predator-naïve Channel catfish were exposed to four extracts over eight sessions (naïve bass water (NBW), bass that were fed catfish water (BFCW), catfish skin extract (CS), and naïve bass water paired with catfish skin extract (CO)) to determine whether they have an innate predator response to potential chemical cues indicating possible predation risk. Movement was quantified as grid squares crossed, directional changes, and tail beats. Response increased during the first minute following stimulus injection and decreased during the second minute. Channel catfish …
Tobramycin Disposition In The Lung Following Airway Administration, Min Li
Tobramycin Disposition In The Lung Following Airway Administration, Min Li
Theses and Dissertations
Tobramycin disposition following airway administration was evaluated by meta-analysis of human data in the literature and, experimentally, using a realistic ex vivo model, the isolated perfused rat lung preparation (IPRL). Pulmonary bioavailability of inhaled tobramycin in published studies was re-evaluated separately for CF and healthy adults, with the drug’s intrinsic pharmacokinetic (PK) parameters obtained from intravenous (IV) studies in the literature. While large variations in tobramycin’s clearance precluded accurate assessment of its bioavailability, the results were indicative of substantial pulmonary absorption, in spite of its hydrophilic and poly cationic properties. To explore its disposition kinetics and mechanisms following airway administration, …
Multi-Column Multi-Layer Computational Model Of Neocortex, Beata Strack
Multi-Column Multi-Layer Computational Model Of Neocortex, Beata Strack
Theses and Dissertations
We present a multi-layer multi-column computational model of neocortex that is built based on the activity and connections of known neuronal cell types and includes activity-dependent short term plasticity. This model, a network of spiking neurons, is validated by showing that it exhibits activity close to biology in terms of several characteristics: (1) proper laminar flow of activity; (2) columnar organization with focality of inputs; (3) low-threshold-spiking (LTS) and fast-spiking (FS) neurons function as observed in normal cortical circuits; and (4) different stages of epileptiform activity can be obtained with either increasing the level of inhibitory blockade, or simulation of …
A New Beginning, Nancy Rae Habit
A New Beginning, Nancy Rae Habit
Theses and Dissertations
Artist Statement My artwork reflects elements of simple, everyday life. I find poignancy in people as they go about their daily business, children playing on the beach or an elderly woman at her kitchen stove. And, it’s not just people in whom I find intrigue. The creases and folds of crumpled, brown paper bags; fresh fish lying on crushed ice in outdoor markets; and household objects, such as chairs, irons, and wooden spoons are the types of things that are also evidence of daily life. In my work, I strive to replicate with both accuracy and emotion all of these …
Algumas Teorias Da Tradução E Suas Implicações Na Tradução Do Conto "Mammon And The Archer" De O. Henry, Simone S. G. C. Fails
Algumas Teorias Da Tradução E Suas Implicações Na Tradução Do Conto "Mammon And The Archer" De O. Henry, Simone S. G. C. Fails
Theses and Dissertations
This paper contains an overview of some of the main 20th Century tendencies in translation theory. It focus especially on matters of equivalence, dynamic equivalence, formal equivalence, skopos, abusive fidelity and foreignizing translation or resistant translation and their implications for actual translations. This paper also includes translations prepared according to the principles of abusive fidelity, equivalence and dynamic equivalence, which are compared and commented.
Pharmacokinetics Of Dexamethasone Delivered Via Iontophoresis, Justin Holbrook Rigby
Pharmacokinetics Of Dexamethasone Delivered Via Iontophoresis, Justin Holbrook Rigby
Theses and Dissertations
Study Design: Controlled laboratory study. Objectives: To determine the time course of dexamethasone sodium phosphate (Dex-P) iontophoresis delivery to underlying tissues using microdialysis. Background: The efficacy of iontophoresis at delivering Dex-P through the skin is unknown in humans because of the lack of minimally invasive measurement techniques. Methods: Sixty-four healthy male participants (age = 24.4 ± 3.3 yrs, height = 71.8 ± 2.5 in, weight = 181.8 ± 26.1 lbs) were randomly assigned into one of six groups: 1) 1 mA current, 1 mm probes depth ; 2) 1 mA current, 4 mm probes depth; 3) 2 mA current, 1 …
Who's Your Daddy? A Study Of Extra-Pair Copulation And Mating Behaviors Of Protonotaria Citrea, Morton Catherine Heidrich
Who's Your Daddy? A Study Of Extra-Pair Copulation And Mating Behaviors Of Protonotaria Citrea, Morton Catherine Heidrich
Theses and Dissertations
Mating behavior has a profound impact on reproductive success and the resulting genetic structure of offspring. Extra-pair copulation is a widely observed behavior within avian species. This study explored the genetic effects of mating behaviors of Prothonotary warblers, Protonotaria citrea (Parulidae), using co-dominant microsatellite markers. Prothonotary warblers are migratory songbirds that build nests in cavities, commonly found in wetland habitats. A set of artificial nest boxes were initiated by Dr Robert Reilly in 2002 in Dutch Gap, Chesterfield County Virginia, USA, a tidal tributary off the James River. From this population, 28 nest boxes were surveyed yielding 47 adults and …
Dissecting Emotion, Jennifer Lopresti
Dissecting Emotion, Jennifer Lopresti
Theses and Dissertations
My art making approach has enabled me to focus on the connection between our anatomical makeup and the inner workings of the mind. It has been a journey to personally bridge the gap between the two and to make sense of the overlapping functions. Anatomical imagery has lent itself to my exploration into the topics of transformation and social interaction, and the emotions that are tied to these concepts. My body of work consists of mixed media and sculptural pieces. I make use of found objects such as vinyl records, rotary phones, and old black and white photographs. These items …
Evolving Art In Junior High, Randal Charles Marsh
Evolving Art In Junior High, Randal Charles Marsh
Theses and Dissertations
A junior high teacher and artist altered the curriculum of his Art Foundations II course and his own artistic practice in response to complexity thinking. This teacher-artist-researcher uses the arts-based methodology a/r/tography to make meaning of the relationship between his art and pedagogy. The a/r/tographer explains the impact of complexity on the philosophy of education, a/r/tography as a methodology, and the meaning making that occurred are included. Evolution was used as a methodology for art making and as constraint for developing artworks in the classroom and in the author's own art. The teacher-artist-researcher conceptualizes art as an emergent complex cultural …
Effects Of Thoracic Spinal Manipulative Therapy On Thoracic Spine And Shoulder Kinematics, Thoracic Spine Flexion/Extension Excursion, And Pressure Pain Sensitivity In Patients With Subacromial Pain Syndrome, Joseph Kardouni
Theses and Dissertations
EFFECTS OF THORACIC SPINAL MANIPULATIVE THERAPY ON THORACIC SPINE AND SHOULDER KINEMATICS, THORACIC SPINE FLEXION/EXTENSION EXCURSION, AND PRESSURE PAIN SENSITIVITY IN PATIENTS WITH SUBACROMIAL PAIN SYNDROME By Joseph R. Kardouni, Ph.D., PT A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, at Virginia Commonwealth University. Virginia Commonwealth University, 2013. Major Director: Lori A. Michener, PhD, PT, ATC, Professor, Department of Physical Therapy In patients with shoulder pain, the use of manual therapy directed at the spine and shoulder have been reported to provide superior outcomes to exercise based interventions or usual care without …
Transcriptional Crosstalk Between Helper Bacteriophages And Staphylococcal Aureus Pathogenicity Islands, Kristin Lane
Transcriptional Crosstalk Between Helper Bacteriophages And Staphylococcal Aureus Pathogenicity Islands, Kristin Lane
Theses and Dissertations
Acquisition of a superantigen pathogenicity island (SaPI) significantly increases virulence in Staphylococcus aureus. Horizontal transfer of SaPIs occurs at high frequency and depends upon a helper bacteriophage, either through direct infection or SOS-mediated induction of a lysogen. SaPIs hijack the packaging machinery of the helper phage, leading to the formation of SaPI-containing transducing particles that can introduce the pathogenicity island into neighboring SaPI-negative cells. All SaPIs contain a conserved core of genes, some of which are co-transcribed as an operon and encode functions involved in helper exploitation. The goal of this study was to more fully understand the intricate relationships …
Partial Purification And Characterization Of Texas Live Oak (Quercus Fusiformis) Lectin, Carmen Guadalupe Cruz
Partial Purification And Characterization Of Texas Live Oak (Quercus Fusiformis) Lectin, Carmen Guadalupe Cruz
Theses and Dissertations
Lectins are carbohydrate-binding proteins with agglutination properties. There is a continuous interest in lectins due to their biological properties that can be exploited for medicinal and therapeutic purposes. The objective of this study was to isolate and characterize lectin in Texas Live Oak (Quercus fusiformis). More specifically, the study aimed to determine the lectin’s blood group specificity and pH stability, determine effects of seasonal variation, soil moisture and soil pH on lectin activity. The study also aimed to determine the presence of antifungal activity in Q. fusiformis extracts. Lectin activity was detected and compared via agglutination and protein assays. Protein …
How Intrinsic Motivation And Extrinsic Motivation Affect Organizational Commitment And Job Satisfaction: A Cross-Cultural Study In The United States And China, Yundong Huang
Theses and Dissertations
This dissertation research is designed to identify how an individual’s work motivation affects his/her organizational commitment and job satisfaction. Work motivation is divided into intrinsic and extrinsic motivation. The three components of organizational commitment proposed by Meyer and Allen are examined separately. This study is a cross-cultural study based on data collected from the United States and China. The data are analyzed using partial least square (PLS) based structural equation modeling (SEM). The results of the SEM analysis are compared between the US and the China sample. The results of this study show that intrinsic motivation is positively associated with …
Dead Virginians: The Corpse And Its Uses In Early Virginia, David Roettger
Dead Virginians: The Corpse And Its Uses In Early Virginia, David Roettger
Theses and Dissertations
The thesis traces the history of colonial Virginia in an attempt to uncover the origins of several peculiarities in Virginia death-ways. Elite Virginians buried at home more often than not (where they could protect the dead from animal desecration), while avoided death’s heads, reapers, and bone based tomb and mourning jewelry iconography even though such was popular throughout the British Atlantic. Research done for this thesis reveals a fear on the part of elite Virginias regarding questions of both corpse desecration and natural putrefaction. The cause of this cultural obsession lie in two facts: The blackening of the early colony’s …
Metabolic Remodeling And Mitochondrial Dysfunction In Maladaptive Right Ventricular Hypertrophy Secondary To Pulmonary Arterial Hypertension, Jose Gomez-Arroyo
Metabolic Remodeling And Mitochondrial Dysfunction In Maladaptive Right Ventricular Hypertrophy Secondary To Pulmonary Arterial Hypertension, Jose Gomez-Arroyo
Theses and Dissertations
Right ventricular dysfunction is the most frequent cause of death in patients with pulmonary arterial hypertension. Although abnormal energy substrate use has been implicated in the development of chronic left heart failure, data describing such metabolic remodeling in failing right ventricular tissue remain incomplete. In the present dissertation we sought to characterize metabolic gene expression changes and mitochondrial dysfunction in functional and dysfunctional RV hypertrophy. Two different rat models of RV hypertrophy were studied. The model of right ventricular failure (SU5416/hypoxia) exhibited a significantly decreased gene expression of peroxisome proliferator-activated receptor- coactivator-1α, peroxisome proliferator- activated receptor-α and estrogen-related receptor-α. The …