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Grain Bag Storage Systems: Monitoring, Analysis, And Effects, Jason Kellam Ward
Grain Bag Storage Systems: Monitoring, Analysis, And Effects, Jason Kellam Ward
Theses and Dissertations
Grain production in the Mid-South US has exceeded traditional grain bin storage capacity in recent years. Alternative grain storage methods were adopted. One method was grain bag storage. This system has been used for silage and high moisture corn storage for decades and has been employed for dry grain in other regions of the world, but little research was available to describe the internal environment of the grain bags and its effects on grain quality. Weather conditions, agricultural methods, and cultural practices vary; therefore further research was required to assess this storage practice and describe best management practices for the …
Growth And Swimming Endurance Of Juvenile Channel Catfish In High Temperature Environments, Michael B. Arnold
Growth And Swimming Endurance Of Juvenile Channel Catfish In High Temperature Environments, Michael B. Arnold
Theses and Dissertations
Channel catfish (Ictalurus punctatus) are important to aquaculture and natural ecosystems, however little is known regarding effects of high summer temperatures, which are predicted to increase with climate change. Therefore, two studies were conducted to examine physiological effects of high temperatures on juvenile channel catfish. The first examined effects of three cycling thermal regimes (23-27°C, 27-31°C, and 31-35°C) characteristic of culture environments in Mississippi on growth, food consumption, feed conversion ratio, specific growth rate, and activity. The second study measured active and resting metabolic rates and swimming endurance at constant temperatures (27, 31, and 35°C). The best growth and feed …
Identification And Characterization Of C-Type Lectin Genes In Reniform Nematode, Satish Ganji
Identification And Characterization Of C-Type Lectin Genes In Reniform Nematode, Satish Ganji
Theses and Dissertations
Reniform nematode, Rotylenchulus reniformis is a semi-endoparasitic nematode infecting over 300 plant species including important fiber crops like cotton. Introgression of reniform nematode resistance from a distantly-related resistant species Gossypium longicalyx into cultivated upland species Gossypium hirsutum has been a challenge. An approach towards achieving nematode resistance in crop plants has been to identify candidate parasitism genes expressed in the nematode facilitating infection of host plant species, and silencing the same through reverse genetic approaches like RNAi. A cDNA library constructed from the sedentary female stage of reniform nematode revealed an EST coding for C-type lectins and occurring in high …
Answers In Diagenesis: Assessing Mussel Shell Diagenesis In The Modern Vadose Zone At Lyon's Bluff (22ok520), Northeast Mississippi, Joe Dan Collins
Answers In Diagenesis: Assessing Mussel Shell Diagenesis In The Modern Vadose Zone At Lyon's Bluff (22ok520), Northeast Mississippi, Joe Dan Collins
Theses and Dissertations
This study considers the chemical alteration of archaeological freshwater shell above the water table at Lyon's Bluff, located in east-central Mississippi, changes in trace element concentrations between unfired and fired shell, and the effect bacteria have on archaeological freshwater shell. Thin-section petrography, X-ray diffraction, cathodoluminescence, and scanning electron microscopy were conducted on archaeological shell from four layers from Unit 20N20W, with a depth of 80 cm spanning 450 years. ICP-MS analysis was also conducted on a modern freshwater shell. Results of the microscopy indicate pristine crystal structure. ICP-MS data show that certain trace elements within the shell maintain their concentration …
Aortic Valve Endothelial Cells And Adhesion Molecules: Implications For A Tissue Engineered Heart Valve, Chelsea Tiller Mcintosh
Aortic Valve Endothelial Cells And Adhesion Molecules: Implications For A Tissue Engineered Heart Valve, Chelsea Tiller Mcintosh
Theses and Dissertations
Children with congenital heart defects and patients with faulty or failing valves have the need for a suitable aortic heart valve replacement. Current treatment options have several downfalls and heavy investigation is being done into the design of an engineered valve to find an alternative that would alleviate many of these issues. Understanding the physiology of how cells interact in vivo is crucial to the construction of such valve. This study investigates the effect of cyclic strain in aortic valve endothelial cells on the adhesion molecules, PECAM-1, ƒÒ1-Integrin, VE-Cadherin and Vinculin. Experiments found that cyclic strain plays a role in …
Oil Related Environmental Degradation And Human Displacement: Case Study Of Niger Delta Nigeria, Joshua Onyemachi
Oil Related Environmental Degradation And Human Displacement: Case Study Of Niger Delta Nigeria, Joshua Onyemachi
Theses and Dissertations
Oil wealth enriches Nigeria, but it has not improved the lives of the majority of the masses living in the oil-bearing areas of the Niger Delta. Niger Delta region has been exposed to environmental risks that have caused many to lose their means of livelihood, triggering high level of poverty in the region. This study examines the impact of oil-related environmental problems and how it has induced human displacement in the Niger Delta. Furthermore, it examined the efficacy of the Nigerian environmental policies as it related to the oil-bearing areas. The research found that oil activities have caused more harm …
Stress Responses And Attachment Of Listeria Monocytogenes In Food, Dongryeoul Bae
Stress Responses And Attachment Of Listeria Monocytogenes In Food, Dongryeoul Bae
Theses and Dissertations
The rates of the US hospitalization and mortality caused by Listeria monocytogenes was estimated to be the highest of 31 food-borne pathogens including Salmonella, Escherichia coli, Campylobacter, and Clostridium. This pathogen has an ability to survive under extreme conditions widely found in the natural environment and food. Among 13 serovars L. monocytogenes serovar 4b, 1/2a and 1/2b are mainly associated with human listeriosis outbreaks. The deadliest outbreaks of human listeriosis and massive product recalls in multi-states were associated with ready-to-eat (RTE) food products such as mexican-style cheese, turkey deli meat, cabbage, and cantaloupes contaminated with the bacterium. Thus, contamination of …
Roles Of Vitamin D And Calcium In Cancer And Diet History Of Vitamin D And Calcium In Cancer Patients And Participants Without Cancer, Gwendolyn Mcneely Howard
Roles Of Vitamin D And Calcium In Cancer And Diet History Of Vitamin D And Calcium In Cancer Patients And Participants Without Cancer, Gwendolyn Mcneely Howard
Theses and Dissertations
Vitamin D and calcium play major roles in our bone health in addition to roles in tissues and cells. These roles in tissues and cells are associated with some cancers. The purpose of this study was to determine attitudes of cancer patients towards their dietary intakes of vitamin D and calcium. A questionnaire was completed by 128 volunteers (mean age=53.5 years±16.6, 94 women, 34 men) from the Montgomery Cancer Clinic in Montgomery, Alabama. Cancer-reporting participants (n=59) were likely to agree more (p=0.048) to the statement, “I try to eat healthy every day” compared to non-cancer reporting participants (n=69) on a …
Salmonella Source And Rate Of Colonization In Two Newly Constructed Commercial Broiler Houses And The Effect Of Used Litter Inoculation In A New House, Lauren Elizabeth Dodds
Salmonella Source And Rate Of Colonization In Two Newly Constructed Commercial Broiler Houses And The Effect Of Used Litter Inoculation In A New House, Lauren Elizabeth Dodds
Theses and Dissertations
The prevalence of Salmonella within poultry environments and on poultry products has been well documented. However, there has not been a study documenting the effect of utilizing used litter in newly constructed commercial broiler houses on Salmonella status or on the rate and source of Salmonella contamination within new houses. Objectives of this study are to 1) determine environmental source and rate of Salmonella spp. colonization in two newly constructed broiler houses 2) to evaluate the effect of mixing used broiler litter with clean litter in a new broiler house. Results of this study suggest that Salmonella contamination of the …
Optical And Laser Spectroscopic Diagnostics For Energy Applications, Markandey Mani Tripathi
Optical And Laser Spectroscopic Diagnostics For Energy Applications, Markandey Mani Tripathi
Theses and Dissertations
The continuing need for greater energy security and energy independence has motivated researchers to develop new energy technologies for better energy resource management and efficient energy usage. The focus of this dissertation is the development of optical (spectroscopic) sensing methodologies for various fuels, and energy applications. A fiber-optic NIR sensing methodology was developed for predicting water content in bio-oil. The feasibility of using the designed near infrared (NIR) system for estimating water content in bio-oil was tested by applying multivariate analysis to NIR spectral data. The calibration results demonstrated that the spectral information can successfully predict the bio-oil water content …
Optimization Of Seed Propagation Of Seven Native Plant Species, Shane H. Huff
Optimization Of Seed Propagation Of Seven Native Plant Species, Shane H. Huff
Theses and Dissertations
Seven plants native to the moist habitats of the pine savannas, woodlands, and Hillside Bog natural area at the Crosby Arboretum, Picayune, MS, were evaluated under laboratory and nursery conditions to determine seed germination percentage, optimal germination temperature, and the effect of substrates on germination. These native plants include: titi (Cyrilla racemiflora L.), buckwheat tree (Cliftonia monophylla Britt.), flameflower (Macranthera flammea (Bartr.) Pennell), deertongue (Carphephorus odoratissimus (Gmel.) Herb. var. odoratissimus), pink coreopsis (Coreopsis nudata Nutt.), tall ironweed (Vernonia angustifolia Michx.), and swamp bay (Persea palustris (Raf.) Sarg.). Laboratory experimentation concluded with germination and determination of optimal temperature regimes. Tall ironweed …
An Approach For Communities To Assess Stormwater Application And Detention Requirements For Overall Watershed Health, Katherine Therese Lunstrum
An Approach For Communities To Assess Stormwater Application And Detention Requirements For Overall Watershed Health, Katherine Therese Lunstrum
Theses and Dissertations
One of the many issues communities will face when trying to protect their local watershed is the lack of background their policy makers have in environmental protection and watershed health. The purpose of this study is to test a range of on-site stormwater management policies against a selection of new development projects from a specific small city of the United States in order to determine what combination of policies works best in a particular urban environment. Three policies were selected to test the range of stormwater approaches being used in the United States. These policies were then measured in a …
An Assessment Of Student Performance In Career And Technical Education Programs And On Core Academic Subject Areas, Annie Jeanette Snow
An Assessment Of Student Performance In Career And Technical Education Programs And On Core Academic Subject Areas, Annie Jeanette Snow
Theses and Dissertations
The purpose of this study was to examine the quality of career and technical education programs on high school students. Specifically, the study addressed the percentage of CTE completers meeting Carl Perkins’ placement indicators in the areas of post secondary education, employment in the field trained or related field, and the military. The study examined whether the percentage of dropout for CTE students was reduced between 2006 and 2010. The study examined whether significant differences existed between CTE participants and non-CTE participants (regular high school students) based on their scores in United States History, English II Writing, English II Multiple …
An Empirical Analysis Of Factors That Affect Student Non-Attendance At Mississippi State Volleyball, Kurt Charles Mayer
An Empirical Analysis Of Factors That Affect Student Non-Attendance At Mississippi State Volleyball, Kurt Charles Mayer
Theses and Dissertations
The purpose of this study was to examine which factors were influences in students choosing to not attend women’s volleyball games at Mississippi State University during the 2011 season. A survey was utilized to measure the impact of 41 factors on non-attendance of 620 students in the constructs of non-venue structural constraints (Leisure Activities, Other Sport Entertainment, Financial Cost, Social Commitments, Game On Radio/TV, Work/School/Church Commitments), internal constraints (Lack of Knowledge, Lack of Someone to Attend With, Lack of Success, No Interest from Others) and external constraints (Arena Location and Parking). The results of a chi-square analysis indicated there were …
The Biology And Management Of Phytophagous Stink Bugs (Pentatomidae) In Mississippi Soybean Production Systems, James Wesley Mcpherson
The Biology And Management Of Phytophagous Stink Bugs (Pentatomidae) In Mississippi Soybean Production Systems, James Wesley Mcpherson
Theses and Dissertations
Stink bugs are the most economically important insect pest of soybeans in Mississippi. This study focused on several aspects of stink bug biology and management. One study examined the residual activity of certain insecticides. Rain was shown to reduce residual activity and after three days most insecticides provided very little control of stink bugs. Stink bugs complete at least one generation a year on early season hosts before moving into soybeans. A study of these early season hosts found that rice stink bug was more prevalent on grasses than the other hosts sampled. Brown stink bug was found on all …
The Biology And Management Of Tarnished Plant Bug Lygus Lineolaris (Palisot De Beauvois), In Cotton, Gossypium Hirsutum (L.), In The Mississippi Delta, Brian Patrick Adams
The Biology And Management Of Tarnished Plant Bug Lygus Lineolaris (Palisot De Beauvois), In Cotton, Gossypium Hirsutum (L.), In The Mississippi Delta, Brian Patrick Adams
Theses and Dissertations
In field experiments, managing for earliness through planting date and varietal maturity reduced tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), densities, insecticide applications, and yield loss. A second experiment highlighted the importance of timely insecticide applications for managing tarnished plant bugs. Differences in fitness parameters were observed between tarnished plant bug populations collected from the Hills and Delta regions of Mississippi. Populations from the Delta region laid more eggs and produced more viable offspring than populations from the Hills. Populations from the Delta reared on cotton developed significantly faster to each life stage than those reared on diet or …
The Comparative Effects Of Arginine Vasotocin On Reproduction In The Boreal (Bufo Boreas Boreas) And Fowler's (Bufo Fowleri) Toad, Tricia Marie Rowlison
The Comparative Effects Of Arginine Vasotocin On Reproduction In The Boreal (Bufo Boreas Boreas) And Fowler's (Bufo Fowleri) Toad, Tricia Marie Rowlison
Theses and Dissertations
The aim of this study was to compare the effects of arginine vasotocin (AVT) administration in the endangered boreal toad (Bufo boreas boreas) and common Fowler’s toad (Bufo fowleri). The objectives of this study were to determine if AVT could elicit: 1) calling, and 2) amplexus behaviors. Toads were paired into single male:female groups and administered AVT at varying concentrations: 0.1, 1.0, 5.0, 10.0 and 25.0 μg/g and in different combinations: 1) only male was treated; 2) only female was treated, and 3) both male and female treated. AVT failed to stimulate any breeding behavior in the boreal toad, but …
The Effect Of Bmp-13 On The Chondroinduction Of Mesenchymal Stem Cells, Hilary Wynne Zelenka
The Effect Of Bmp-13 On The Chondroinduction Of Mesenchymal Stem Cells, Hilary Wynne Zelenka
Theses and Dissertations
Articular cartilage is a smooth, white connective tissue that covers and protects the ends of long bones to allow for a smooth, frictionless surface on which to glide for easy movement. Once the tissue is damaged, articular cartilage lacks a direct blood supply, which results in a limited ability to repair itself. This study explores the effect of the growth factor BMP-13 on the chondroinduction of primary human bone marrow-derived mesenchymal stem cells. The results demonstrate the limited ability of BMP-13 to exert a strong chondroinductive effect on human bone marrow-derived MSCs. However, the results do indicate that BMP-13 has …
The Effects Of Aspirin And Cyclosporine On Canine Platelet Function And Cyclooxygenase Expression, John Metcalfe Thomason
The Effects Of Aspirin And Cyclosporine On Canine Platelet Function And Cyclooxygenase Expression, John Metcalfe Thomason
Theses and Dissertations
Immune-mediated hemolytic anemia (IMHA) is one of the most common causes of anemia in dogs. Despite aggressive therapy, there is a 50% mortality rate in IMHA patients, and the most common cause of death is thromboembolic disease, particularly pulmonary thromboembolism. With the high thromboembolism rate in dogs with IMHA, anti-platelet therapy with aspirin can be a life-saving preventative therapy. Along with anti-platelet therapy, immunosuppressive therapy is needed to decrease erythrocyte destruction. Cyclosporine has become a popular medication for immunosuppression in IMHA patients. Unfortunately, recent human reports have suggested that cyclosporine could activate platelets and contribute to a hypercoagulable state. With …
The Effects Of Land Use And Contaminant Transport At A Proposed Reservoir Site In Smith County, Mississippi, William Earl Cherry
The Effects Of Land Use And Contaminant Transport At A Proposed Reservoir Site In Smith County, Mississippi, William Earl Cherry
Theses and Dissertations
This study investigates nutrient and contaminant transport within the Oakohay Creek watershed in order to (1) demonstrate the effects of land use on water quality, (2) model and predict the trophic state of the proposed reservoir given current nutrient loads, and (3) understand potential groundwater flow paths within the reservoir footprint. This study demonstrates that the current, large-scale poultry industry, though not statistically significant with a confidence of 95%, does have a negative impact on the surface water quality. The study also shows evidence for a eutrophic reservoir (TSI-P of 59.4 area-weighted mean) with an increased potential for nuisance algal …
Modeling Effects Of Climatological Variability And Management Practices On Conservation Of Groundwater From The Mississippi River Valley Shallow Alluvial Aquifer In The Mississippi Delta Region, Robert Frank Thornton
Modeling Effects Of Climatological Variability And Management Practices On Conservation Of Groundwater From The Mississippi River Valley Shallow Alluvial Aquifer In The Mississippi Delta Region, Robert Frank Thornton
Theses and Dissertations
Ninety-eight percent of water taken from the Mississippi River Shallow Alluvial Aquifer, hereafter referred to as “the aquifer” or “MRVA,” is used by the agricultural industry for irrigation. Mississippi Delta agriculture is increasingly using more water from the MRVA and the aquifer has been losing about 300,000 acreeet per year. This research expands on previous work in which a model was developed that simulates the effects of climatic variability, crop acreage changes, and specific irrigation methods on consequent variations in the water volume of the MRVA. This study corrects an identified problem by replacing total growing season precipitation with an …
Movement, Space Use, And Cause-Specific Mortality Of Translocated Wild Turkeys In The Mississippi Delta, Kyle Marable
Movement, Space Use, And Cause-Specific Mortality Of Translocated Wild Turkeys In The Mississippi Delta, Kyle Marable
Theses and Dissertations
The eastern wild turkey (Meleagris gallapovo silvestris) was nearly extirpated from the Mississippi Alluvial Valley (MAV) from overharvesting and habitat loss in the early 1900s. Habitat restoration with hardwood regeneration has likely improved habitat suitability for turkeys in the MAV. I studied establishment and movement of translocated turkeys to assess feasibility of turkey restoration in the MAV. Turkeys were translocated to 2 study sites in the MAV during winters of 2009 and 2010. I monitored movement, survival, and resource selection of translocated turkeys using radio telemetry (February 2009–April 2011). Movement increased with increasing resource dispersion. Mortalities did not differ among …
Multi-Scale Response Of Upland Birds To Targeted Agricultural Conservation, Kristine Oswald Evans
Multi-Scale Response Of Upland Birds To Targeted Agricultural Conservation, Kristine Oswald Evans
Theses and Dissertations
As human populations rise exponentially, agricultural production systems must be adapted to sustain ecosystem function. Government administered agricultural conservation programs may actualize greater gains in ecosystem services, including wildlife population gains, if conservation practices designed to target specific environmental outcomes are implemented strategically in agricultural landscapes. I evaluated multi-scale, multi-species, and multi-season avian population responses to a targeted native herbaceous buffer practice (CP33: Habitat Buffers for Upland Birds) under the continuous sign-up Conservation Reserve Program administered by the U.S. Department of Agriculture. CP33 is the first conservation practice targeted directly to support habitat and population recovery objectives of a national …
The Impact Of Organochlorine Pesticides And Lipid Biomarkers On Type 2 Diabetes Mellitus, Paul Robert Eden
The Impact Of Organochlorine Pesticides And Lipid Biomarkers On Type 2 Diabetes Mellitus, Paul Robert Eden
Theses and Dissertations
Type 2 diabetes mellitus (T2DM) is classified as a metabolic disorder characterized by hyperglycemia that results from defects in insulin action and/or secretion, and currently affects 8.3% of the US population according to the CDC’s 2011 National Diabetes Fact Sheet. Several contributing factors have been identified to development of this disease. Published evidence indicates type 2 diabetes mellitus (T2DM) patients display lower overall paraoxonase activity and that this may be partially due to genetic variations in the paraoxonase-1 (PON-1) gene. Some bioaccumulative organochlorine (OC) pesticides have been shown to contribute to increased T2DM prevalence. In addition, these OC compound levels …
The Origin Of Banana Holes On San Salvador Island, The Bahamas, Louis R. Infante
The Origin Of Banana Holes On San Salvador Island, The Bahamas, Louis R. Infante
Theses and Dissertations
Banana holes are a common karst feature of The Bahamas and several theories have been presented to explain their origin. The current model for banana hole formation places their dissolution at the mixing zone at the top of the fresh water lens. This theory is based on the observation that banana holes are often found in the interior of islands, far from the dissolutionally aggressive fresh water lens margin. This study proposes that banana holes form at the lens margin as it follows a prograding strandplain. Spatial observations show that banana holes appear to be associated with low inland ridges …
Validation Of Bioluminescent Escherichia Coli O157:H7 For Use As A Pre-Harvest Food Safety Model, Heather Ann Duoss
Validation Of Bioluminescent Escherichia Coli O157:H7 For Use As A Pre-Harvest Food Safety Model, Heather Ann Duoss
Theses and Dissertations
Cattle are naturally colonized by enterohemorrhagic Escherichia coli within the gastrointestinal tract. The most notorious of the enterohemorrhagic E. coli is E. coli O157:H7, which can cause serious illness to humans if ingested. To ensure that the United States has a safe food supply, research is ongoing in pre-harvest food safety and pathogen intervention strategies. While advances in pre-harvest intervention strategies are encouraging, no method has proven to completely eliminate and/or control O157:H7. A key limitation to successful pathogen intervention strategies is the inability to track and monitor pathogens in a real-time fashion. Through the use of bioluminescent plasmids harboring …
Why Can't A Woman Fly?: Nasa And The Cult Of Masculinity, 1958-1972, Erinn Catherine Mccomb
Why Can't A Woman Fly?: Nasa And The Cult Of Masculinity, 1958-1972, Erinn Catherine Mccomb
Theses and Dissertations
This is an investigation into the history of masculinity in spaceflight during some of the tensest years of the Cold War era. This dissertation asks why the U.S. did not counter the Soviet launch of the first woman into space. Scholars have pieced together the story of American women’s fight for spaceflight. The dissertation adds another layer to this narrative by analyzing the construction of the astronaut image from 1958 to 1972, a period characterized by a widespread masculinity crisis. Scholars of Cold War America suggest that Americans saw communism, conformity, feminism, homosexuality, bureaucracy, corporations, male consumerism, leisure, automation, and …
Lipid Accumulation In Synthetic Wastewater-Grown Oleaginous Microorganisms, Andrew Thompson Ford
Lipid Accumulation In Synthetic Wastewater-Grown Oleaginous Microorganisms, Andrew Thompson Ford
Theses and Dissertations
Wastewater has been shown to contain the necessary nutritive requirements for the growth of microorganisms. The term, oleaginous, has been given to a classification of microorganisms know to produce up to twenty percent of the weight as oil. This study is designed to examine the potential accumulation of lipids within an oleaginous consortium grown on synthetic wastewater. Potential of the fluorescent stain, Nile red, as a lipid detector is also emphasized. Percentages of extractables greater than thirtyive percent were achieved within the oleaginous consortium using a nitrogen-limited medium. Low pH was found to increase the percentages of extractables. Xylose was …
Symptom Clusters In Lung Cancer Patients, Debra Rattican
Symptom Clusters In Lung Cancer Patients, Debra Rattican
Theses and Dissertations
SYMPTOM CLUSTERS IN LUNG CANCER PATIENTS By Debra Rattican, PhD, RN A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Virginia Commonwealth University. Virginia Commonwealth University, 2012 Major Director: Debra E. Lyon, PhD. Professor and Chair Family and Community Health Nursing The purpose of the study was to examine selected relationships among symptoms common to individuals with lung cancer. The specific aims were: 1) To examine the relationship between the symptoms of dyspnea and anxiety in patients with lung cancer. 2) To examine the relationships among the symptoms of dyspnea, anxiety, and …
Optimization Of Feature Selection In A Brain-Computer Interface Switch Based On Event-Related Desynchronization And Synchronization Detected By Eeg, Mason Montgomery
Optimization Of Feature Selection In A Brain-Computer Interface Switch Based On Event-Related Desynchronization And Synchronization Detected By Eeg, Mason Montgomery
Theses and Dissertations
There are hundreds of thousands of people who could benefit from a Brain-Computer Interface. However, not all are willing to undergo surgery, so an EEG is the prime candidate for use as a BCI. The features of Event-Related Desynchronization and Synchronization could be used for a switch and have been in the past. A new method of feature selection was proposed to optimize classification of active motor movement vs a non-active idle state. The previous method had pre-selected which frequency and electrode to use as electrode C3 at the 20Hz bin. The new method used SPSS statistical software to determine …