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Development Of Biomass-Based Form Coke Production Process, Abhijith Madabhushi
Development Of Biomass-Based Form Coke Production Process, Abhijith Madabhushi
Theses and Dissertations
Metallurgical coke is an important component of the iron and steel industry. It is obtained from high quality coking coals like bituminous coal. However, due to the limited resources and high levels of Green house Gases, alternatives to the product are of high demand. Availability of raw materials is an important factor. The product should have high heating value, strength and lower emissions. Research is being done on form coke technology; to produce high quality substitutes with inexpensive materials like lignite. A biomass-based form coke production process is developed. Two types of raw materials are selected at beginning of process. …
Development Of Degradable Renewable Polymers And Stimuli-Responsive Nanocomposites, Ersan Eyiler
Development Of Degradable Renewable Polymers And Stimuli-Responsive Nanocomposites, Ersan Eyiler
Theses and Dissertations
The overall goal of this research was to explore new living radical polymerization methods and the blending of renewable polymers. Towards this latter goal, polylactic acid (PLA) was blended with a new renewable polymer, poly(trimethylene-malonate) (PTM), with the aim of improving mechanical properties, imparting faster degradation, and examining the relationship between degradation and mechanical properties. Blend films of PLA and PTM with various ratios (5, 10, and 20 wt %) were cast from chloroform. Partially miscible blends exhibited Young’s modulus and elongation-to-break values that significantly extend PLA’s usefulness. Atomic force microscopy (AFM) data showed that incorporation of 10 wt% PTM …
Career Trajectories, Gender Differences And Accumulated Health Disparities Over The Life Course, Li Zheng
Career Trajectories, Gender Differences And Accumulated Health Disparities Over The Life Course, Li Zheng
Theses and Dissertations
Using longitudinal data from Panel Study of Income and Dynamic (PSID) and multivariate analyses, this dissertation examines the dynamic and longitudinal relationship between gender, occupational career and health among people of working age under the new economy. The major concern is whether there are gender differences in the health returns to occupation/employment resources across life course, whether the gendered health gap diverges with age, and whether health affect men' and women's employment transitions and occupational mobility differently. Results show that women experience significantly poorer health than men, but this health gap reduces with aging. The health disadvantages experienced by women …
Changes In Host Use By Unionid Mussels Following River Channelization And Impoundment, Lee Gray Turnage
Changes In Host Use By Unionid Mussels Following River Channelization And Impoundment, Lee Gray Turnage
Theses and Dissertations
More than half the North American freshwater mussel species in the family Unionidae (unionids) are imperiled or extinct. Alteration of rivers is considered a major contributor to unionid population declines. Losses could occur through disruption of the reproductive cycle. Unionid reproduction requires attachment of larva (glochidia) to host fishes; therefore, changes in the host fish community could alter the reproductive potential in unionid communities. There have been few attempts to compare reproductive success before and after alteration. I examined the pattern of glochidia use on two common host fishes, Lepomis megalotis and Cyprinella venusta, before and after alteration of the …
Comparison Of Student Achievement Among Two Science Laboratory Types: Traditional And Virtual, Mary Celeste Reese
Comparison Of Student Achievement Among Two Science Laboratory Types: Traditional And Virtual, Mary Celeste Reese
Theses and Dissertations
Technology has changed almost every aspect of our daily lives. It is not surprising then that technology has made its way into the classroom. More and more educators are utilizing technological resources in creative ways with the intent to enhance learning, including using virtual laboratories in the sciences in place of the “traditional” science laboratories. This has generated much discussion as to the influence on student achievement when online learning replaces the face-toace contact between instructor and student. The purpose of this study was to discern differences in achievement of two laboratory instruction types: virtual laboratory and a traditional laboratory. …
Assessment Of Canine Immunity Using Computational And Flow Cytometric Approaches, Kriston Weaver
Assessment Of Canine Immunity Using Computational And Flow Cytometric Approaches, Kriston Weaver
Theses and Dissertations
The Affymetrix GeneChip® Canine Genome 2.0 microarray is re-annotated using AgBase tools, up-to-date ID mapping and GO annotations associated with publicly available gene products updated on this array. This re-annotation makes the array more useful for researchers using the canine microarray for biological discovery. We use flow cytometry to determine if liposomal clodronate (LC) is an acceptable alternative to surgical splenectomy to facilitate detection of subclinical infection with Babesia canis in potential blood donor greyhounds. Our study shows that LC is not a reliable means of exposing babesiosis in greyhounds with a recent history of infection. We evaluate the effect …
Antioxidative And Antimicrobial Activity Of Casein Hydrolyzate In Cheddar Whey-Based Edible Coatings, Yin Zhang
Antioxidative And Antimicrobial Activity Of Casein Hydrolyzate In Cheddar Whey-Based Edible Coatings, Yin Zhang
Theses and Dissertations
Hydrolysis of casein using chymotrypsin results in the formation of polypeptides (CH) with a hydrophobic aromatic amino acid on one end of the chain because the enzyme selectively cleaves the adjacent peptide-bond. Due to resonance of the aromatic micro-domain, thiols become redox-sensitive and actively participate in electron transfer. These types of amphipathic peptides also tend to be membrane-lytic. The two prong approach of this investigation was to, (1) assess antibacterial effect of the CH in beef steak, and (2), to determine its antioxidative efficacy as a constituent of Cheddar whey based edible coating mix. The edible coating prevented coliform growth …
Time-Domain Fiber Loop Ringdown Sensor And Sensor Network, Malik Kaya
Time-Domain Fiber Loop Ringdown Sensor And Sensor Network, Malik Kaya
Theses and Dissertations
Optical fibers have been mostly used in fiber optic communications, imaging optics, sensing technology, etc. Fiber optic sensors have gained increasing attention for scientific and structural health monitoring (SHM) applications. In this study, fiber loop ringdown (FLRD) sensors were fabricated for scientific, SHM, and sensor networking applications. FLRD biosensors were fabricated for both bulk refractive index (RI)- and surface RI-based DNA sensing and one type of bacteria sensing. Furthermore, the effect of glucose oxidase (GOD) immobilization at the sensor head on sensor performance was evaluated for both glucose and synthetic urine solutions with glucose concentration between 0.1% and 10%. Detection …
Tools For Water Level Management In Flood Control Reservoirs, Ethan B. Mower
Tools For Water Level Management In Flood Control Reservoirs, Ethan B. Mower
Theses and Dissertations
Flood-control reservoirs experience water level fluctuations that control survival of their biota. I explored diverse but related aspects of water-level management. Three frameworks were indentified for directing rule curve (i.e., daily targets for water levels) changes in flood-control reservoirs managed by the U.S. Army Corps of Engineers (USACE), with differing scopes and requirements. Framework choice depends on the reservoir’s primary authorization and magnitude of the contemplated change. Changes without congressional approval must be based on flood risk. Quantile regression was used to model a maximum water level with a user-specified level of risk. Because actions that request changes to water …
Transcriptome Response Associated With Protective Immunity In T And B Cell Deficient Zebrafish, Aparna Krishnavajhala
Transcriptome Response Associated With Protective Immunity In T And B Cell Deficient Zebrafish, Aparna Krishnavajhala
Theses and Dissertations
RAG1-/- mutant zebrafish lack T and B lymphocytes. However, when re-exposed to homologous bacteria, these fish mount a response that provides specific protection. To further define this response, we utilized microarray analyses to determine the mechanisms underlying innate immune system memory in zebrafish. We also analyzed interferon (IFN) gamma by qRT-PCR. It is produced by activated NK cells and could indicate if this cell mediates the protective response seen in lymphocyte deficient zebrafish. Pathological studies and in situ hybridizations were performed to observe tissue changes and location of the cells that produced IFN gamma. Following bacterial re-exposure, zebrafish transcripts in …
What To Do With "Prefer Not To Vote" Responses From Stated Preference Surveys?, Joonghyun Hwang
What To Do With "Prefer Not To Vote" Responses From Stated Preference Surveys?, Joonghyun Hwang
Theses and Dissertations
Arrow et al. (1993) issued guidelines for contingent valuation, one of which was the recommendation that valuation questions include a ‘no-answer’ option such as ‘I prefer not to vote (PNV)’ in addition to the typical ‘yes’ and ‘no’ options. However, they did not give further guidelines on what to do with such responses, and there are various opinions in the literature. The objective of this thesis was to identify factors that affect the probability of a respondent choosing the PNV option in stated preference surveys. This thesis identified a positive relationship between offered bid for the proposed environmental project and …
Implications Of Volunteer Corn And Cross-Pollination Of Bt And Non-Bt Corn On Corn Earworm (Lepidoptera: Noctuidae) Bt Resistance Management, Arun Babu
Theses and Dissertations
Transgenic corn hybrids expressing Bt toxins are widely deployed to control pests such as Helicoverpa zea (Boddie). However, Bt resistance can reduce the efficacy of Bt corn hybrids. Volunteer corn expressing Bt toxins may impact Bt resistance management of pests. Surveys in Mississippi revealed the occurrence of fall season volunteer corn in high densities. Helicoverpa zea larvae were found feeding during both vegetative and reproductive stages. However, Bt parentage and low to moderate water and nitrogen stresses did not significantly influence H. zea larval growth and development on Bt positive volunteer plants. Additionally, pollen mediated Bt gene flow to non-Bt …
Inbreeding And Heterozygosity-Fitness Correlations In A Small, Isolated Population Of Turks And Caicos Rock Iguanas, Cyclura Carinata, Jamen W. Berk
Inbreeding And Heterozygosity-Fitness Correlations In A Small, Isolated Population Of Turks And Caicos Rock Iguanas, Cyclura Carinata, Jamen W. Berk
Theses and Dissertations
Inbreeding depression affects captive populations and those that have been recently impacted by anthropogenic disturbance. However, the evolutionary importance of inbreeding depression in natural populations is not well understood. This study focuses on a naturally small population of Cyclura carinata, the Turks and Caicos Rock Iguana, that has likely been stable for hundreds of generations. Genotypic data at 13 polymorphic microsatellite loci, along with fitness proxies, were collected from 188 individuals across three age classes. Multi-locus heterozygosity is strongly predictive of age class (p < 0.03), and is significantly lower in hatchlings than in juveniles or adults. Estimates for intensity of selection favoring heterozygosity range from 0.498-0.627, indicating that this proportion of individuals fail to survive due to inbreeding depression. The heterozygosityitness correlation among adults is significant (p < 0.01), suggesting outbred individuals have higher reproduction success. Hence, the lifetime influence of inbreeding on fitness is extremely high.
Influence Of Temperature On The Induction Of Alkali-Stress Adaptation And Its Stability In Listeria Monocytogenes Serotypes 1/2a And 4b, Pooja Pandare
Influence Of Temperature On The Induction Of Alkali-Stress Adaptation And Its Stability In Listeria Monocytogenes Serotypes 1/2a And 4b, Pooja Pandare
Theses and Dissertations
The purpose of this study is to determine the effect of temperature on inducing an alkaline-tolerance response in L. monocytogenes (Lm) serotypes 1/2a and 4b. When Lm cells were pre-exposed to a sublethal alkali pH of 9.0 at different temperatures, two main patterns were observed: (1) Alkali-stress adaptation was readily induced in Lm when cells were pre-exposed to a sublethal alkali pH of 9.0 for 5-15 min at 37°C or 22°C; and (2) Alkali-stress adaptation was not induced in Lm when cells were pre-exposed to a sublethal alkali pH of 9.0 for 1 h at 4°C. However, exposure of Lm …
Mitigating Aquaculture Effluent Through Use Of Low-Grade Weirs, Corrin Lee Flora
Mitigating Aquaculture Effluent Through Use Of Low-Grade Weirs, Corrin Lee Flora
Theses and Dissertations
Water management practices to reduce mass discharge are a major point of concern for aquaculture producers. This study assessed effects of consecutive low-grade weirs on chemical retention and settling of aquaculture pond effluent in a single drainage ditch. Two control and nine treatment discharges were conducted September - October 2012. Control discharge dissolved inorganic phosphorus (DIP) load increased 154%, whereas total inorganic phosphorus (TIP), ammonia, and nitrate loads decreased (47%, 43%, and 63%, respectively). Treatment discharge nutrient loads decreased across all analytes (80% DIP, 86% TIP, 89% ammonia, 89% nitrate). However, control and treatment discharges concentrations of DIP and nitrate …
Floodplain Lake Assessment And Fish Assemblage Dynamics In The Mississippi Alluvial Valley, Caroline Noelle Steiner Andrews
Floodplain Lake Assessment And Fish Assemblage Dynamics In The Mississippi Alluvial Valley, Caroline Noelle Steiner Andrews
Theses and Dissertations
Floodplain lakes in the Mississippi Alluvial Valley (MAV) provide valuable freshwater resources for states in which they occur. Thirty lakes in portions of Mississippi and Arkansas were surveyed for chlorophyll-a fluorescence and turbidity using handheld meters to determine relationships between chlorophyll-a concentrations and suspended solids. High applicability of handheld meters in the MAV presents economic benefits for monitoring the numerous lakes in the region. Additionally, twelve lakes within Bear Creek watershed, Mississippi were studied to determine how hydrologic connectivity shapes fish communities. Isolated and permanently connected floodplain lakes exhibited characteristically lacustrine and rheophilic fish communities, respectively, diversifying fishery management opportunities. …
Functional Analysis Identifies Glycine Max Genes Involved In Defense To Heterodera Glycines, Prachi D. Matsye
Functional Analysis Identifies Glycine Max Genes Involved In Defense To Heterodera Glycines, Prachi D. Matsye
Theses and Dissertations
The infection of plants by Heterodera glycines, commonly known as soybean cyst nematode (SCN), is a serious agricultural problem of worldwide extent. Meanwhile, it provides an excellent experimental model to study basic aspects of how cells function, in particular, during biotic challenge. Heterodera glycines challenges plant cells by initiating, developing and sustaining an interaction that results in the formation of a nurse cell from which the nematode derives nourishment. The presented experiments examine (1) how a cell can be de-differentiated and reprogrammed to perform a much different biological role and (2) how a cell’s immune responses can be engaged or …
Gender Grouping And Its Initial Effect On A Title I Upper Elementary School During The Pilot Year Of Implementation, Pamela Reed Simon
Gender Grouping And Its Initial Effect On A Title I Upper Elementary School During The Pilot Year Of Implementation, Pamela Reed Simon
Theses and Dissertations
Studies have documented challenges in meeting No Child Left Behind (NCLB) expectations as well as gender differences that contribute to the achievement gaps between boys and girls. In response to increased NCLB accountability and achievement gaps between boys and girls, several experts have promoted single-sex education as a possible strategy to improving student achievement. The purpose of this study was to examine data that were gathered from an economically disadvantaged Title I federally-assisted upper elementary school with respect to the implementation of single-gender classrooms. This study was guided by the following two research questions: First, what were the perspectives from …
Genetic Variation In The Ft1 Locus Involved In Reproductive Onset In Populus Deltoides, Ali Akgul
Genetic Variation In The Ft1 Locus Involved In Reproductive Onset In Populus Deltoides, Ali Akgul
Theses and Dissertations
The onset of reproduction is an important trait and is controlled by the FT1 locus in poplar (Populus sp.). Sequence variation in this locus is not well-understood. This study's aim is to identify sequence variation in the FT1 locus in a small population of Populus deltoides with varying reproductive onset. Gene specific primers were designed to amplify FT from 14 genotypes. The sequence analysis showed 12 single nucleotide polymorphisms and four insertion-deletion sites located in introns of FT1. No connection was observed between the identified polymorphisms and variation in reproductive onset. Further DNA sequencing of the genotypes needs to be …
Halo Nuclei Interactions Using Effective Field Theory, Lakma K (Lakma Kaushalya) Fernando
Halo Nuclei Interactions Using Effective Field Theory, Lakma K (Lakma Kaushalya) Fernando
Theses and Dissertations
Effective field theory (EFT) provides a framework to exploit separation of scales in the physical system in order to perform systematic model-independent calculations. There has been significant interest in applying the methods of EFT to halo nuclei. Using halo effective field theory, I provide a model-independent calculation of the radiative neutron capture on lithium-7 over an energy range where the contribution from the 3+ resonance becomes important. This reaction initiate the sequence in the carbon-nitrogen-oxygen (CNO) cycle in the inhomogeneous BBN models, and determine the amount of heavy element production from its reaction rate. One finds that a satisfactory description …
Human Fatigue In Prolonged Mentally Demanding Work-Tasks: An Observational Study In The Field, Shaheen Ahmed
Human Fatigue In Prolonged Mentally Demanding Work-Tasks: An Observational Study In The Field, Shaheen Ahmed
Theses and Dissertations
Worker fatigue has been the focus of research for many years. However, there is limited research available on the evaluation and measurement of fatigue for prolonged mentally demanding activities. The objectives of the study are (1 )to evaluate fatigue for prolonged, mentally demanding work-tasks by considering task-dependent, task-independent and personal factors, (2) to identify effective subjective and objective fatigue measures, (3) to establish a relationship between time and factors that affect fatigue (4) to develop models to predict fatigue. A total of 16 participants, eight participants with western cultural backgrounds and eight participants with eastern cultural backgrounds, currently employed in …
Identification Of Acid Volatile Sulfides As A Predictor Of Sediment Oxygen Demand And Comparison Of The Degree Of Pyritization Between Weeks Bay, Al And Old Tampa Bay, Fl, Erin Leigh Anderson
Identification Of Acid Volatile Sulfides As A Predictor Of Sediment Oxygen Demand And Comparison Of The Degree Of Pyritization Between Weeks Bay, Al And Old Tampa Bay, Fl, Erin Leigh Anderson
Theses and Dissertations
Weeks Bay, AL is a governmentally protected reserve near Mobile Bay, AL, while Old Tampa Bay, FL is an urbanized estuary, located along the western coast of Florida. Estuary health is important to local economies and the health of local marine life, with an emphasis on low levels of eutrophication. Sediment oxygen demand (SOD) is usually measured to qualify the environmental health of estuaries, but SOD is timeconsuming and expensive. Average acid volatile monosulfides (AVS) concentrations were found to accurately predict SOD variances. The Degree of Pyritization (DOP) is a measure of long-term sediment oxidation conditions, which indicates normal estuary …
Evaluation Of Rapidly Growing Vegetation On Mississippi Roadsides, Timothy Bradford Jr.
Evaluation Of Rapidly Growing Vegetation On Mississippi Roadsides, Timothy Bradford Jr.
Theses and Dissertations
Non-point source pollution caused by erosion from road construction poses hazardous environmental effects. Percolation and infiltration of nutrients into groundwater can also be detrimental to the surrounding environment. In addition, annual roadside maintenance budget exceeded $14 million in 2011 for Mississippi. Objectives of this research were to evaluate rapidly established short-statured species in an effort to prevent erosion, combat non-point source pollution, reduce mowing cost, and provide quick cover following propagation. Factors evaluated were rate of establishment, plant cover, and mowing requirement. MDOT’s standard seed mix was evaluated along with Pennington’s SlopeMaster product and different combinations of selected plant species. …
Evaluation Of Uncertainty In Hydrodynamic Modeling, Rene Alexander Camacho Rincon
Evaluation Of Uncertainty In Hydrodynamic Modeling, Rene Alexander Camacho Rincon
Theses and Dissertations
Uncertainty analysis in hydrodynamic modeling is useful to identify and report the limitations of a model caused by different sources of error. In the practice, the main sources of errors are divided into model structure errors, errors in the input data due to measurement imprecision among other, and parametric errors resulting from the difficulty of identifying physically representative parameter values valid at the temporal and spatial scale of the models. This investigation identifies, implements, evaluates, and recommends a set of methods for the evaluation of model structure uncertainty, parametric uncertainty, and input data uncertainty in hydrodynamic modeling studies. A comprehensive …
Field Disease Incidence, Fungal Collection, And Evaluation Of Koch's Postulates With Isolated Fungi From Giant Miscanthus (Miscanthus X Giganteus) In Mississippi, Maxwell Daniel Gilley
Field Disease Incidence, Fungal Collection, And Evaluation Of Koch's Postulates With Isolated Fungi From Giant Miscanthus (Miscanthus X Giganteus) In Mississippi, Maxwell Daniel Gilley
Theses and Dissertations
The establishment of perennial grasses as biomass crops has increased the production acreage of giant miscanthus (Miscanthus x gigantues Greef et Deu, MXG). Yield loss and establishment failure could be detrimental to the sustainable production of this crop, and therefore, exploitation of differentiation in cultivar response to fungal diseases could be a key management strategy. A study was initiated in 2010 to evaluate MXG cultivars for foliar disease incidence (FDI) and compare to switchgrass (Panicum virgatum L., SG) cultivars, isolate and identify fungi from symptomatic leaf material, and demonstrate through Koch’s postulates the ability of these fungi to incite symptoms …
Intra And Extracellular Functions Of Sphingosine-1-Phosphate In Sterile Inflammation., Jessie Yester
Intra And Extracellular Functions Of Sphingosine-1-Phosphate In Sterile Inflammation., Jessie Yester
Theses and Dissertations
Sterile inflammation is a key component of a variety of diseases including, gout, arthritis, type 1 diabetes, Alzheimer’s disease and multiple sclerosis (MS). Sterile inflammation induces the recruitment of immune cells via chemokines, such as CCL5 and CXCL10. Expression of these chemokines is dependent on IRF-1. Recently the FDA has approved the use of a pro-drug, FTY720 that after phosphorylation becomes a S1P mimetic for the treatment of MS. This report describes two novel and opposing mechanisms of S1P action in sterile inflammation. First, intracellular S1P acts as a cofactor of cIAP2 that inducesIL-1-dependent K63-polyubiquitination of IRF-1, which leads to …
Power Of Shame: The Moderating Effects Of Parental And Peer Connection On The Relationship Between Adolescent Shame And Depression, Self-Esteem, And Hope, Alexander L. Hsieh
Power Of Shame: The Moderating Effects Of Parental And Peer Connection On The Relationship Between Adolescent Shame And Depression, Self-Esteem, And Hope, Alexander L. Hsieh
Theses and Dissertations
Past research and views on shame have indicated that shame has detrimental effects for adolescent development. Little research has focused on the pathways in which shame may affect adolescent traits. Even less studies examine what variables may moderate the effects of shame. Using adolescent self-report questionnaires, this study examined the relationship between adolescent shame and depression, self-esteem, and hope. In addition, this study examined the moderating effect maternal, paternal, and best friend relationships have between shame and adolescent outcome variables. A structural equation moderation model analysis was fit to data from 307 two-parent families. The average age of adolescents for …
The Role Of Pain-Related Catastrophizing In Outcomes And Recovery From Minimally Invasive And Surgical Procedures For Treating Temporomandibular Disorders, Aaron Martin
Theses and Dissertations
The current study examined the ability of pain-related catastrophizing to predict outcomes following non-surgical and surgical intervention for temporomandibular disorders (TMDs). The interpersonal context of pain-related catastrophizing, referred to as the communal coping model, was also examined to determine if patient perceptions of punishing and solicitous responses from significant others would moderate or mediate relations between pain catastrophizing and outcomes. The role of pain duration as a moderator of the relation between pain-related catastrophizing and perceived significant other responding was also examined. A total of 94 patients were identified for which 65 had follow-up outcomes that could be examined. Patient …
Osteopontin Expression During The Acute Immune Response Mediates Reactive Synaptogenesis And Adaptive Outcome, Julie Chan
Theses and Dissertations
Traumatic brain injury (TBI) is a worldwide epidemic as the number of victims living with the resulting cognitive and physical impairment continues to rise, principally due to limited treatment options which fail to address its multifaceted sequelae. By approaching TBI therapy from a molecular standpoint, we have the opportunity to develop a better understanding of the mechanisms which prevent effective recovery. With this information, we can move toward the identification of novel therapeutic treatments which target specific molecules to improve patient outcome following TBI. Here, we have focused on the therapeutic potential of osteopontin (OPN), an extracellular matrix (ECM) protein …
Confocal Microscopy Study Of The Embryonic Development Of The Viviparous Nemertean Prosorhochmus Americanus Reveals Larval Features Supporting Indirect Development In Hoplonemerteans, S Tyler Spindle
Theses and Dissertations
Recent studies of hoplonenemertean planuliform larvae have clarified their development and provided insight into larval evolution within the phylum. However, an assessment of viviparous development using modern techniques is lacking. To help facilitate a comprehensive comparative evaluation of developmental diversity within hoplonemerteans, we have conducted a confocal laser scanning microscopy investigation of the development in Prosorhochmus americanus, one of the few viviparous hoplonemertean species. Phalloidin staining provides evidence of a modified transitory larval epidermis, and reveals that the foregut, midgut, proboscis, central nervous system, and body wall musculature form early in development, consistent with observations for planktonic and encapsulated hoplonemertean …