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Predisposing Risk Factors Associated With Stress Fracture Development In Division I Cross Country Runners, Kaci Griffin
Predisposing Risk Factors Associated With Stress Fracture Development In Division I Cross Country Runners, Kaci Griffin
Electronic Theses and Dissertations
The purpose of this study was to explore potential factors that could be associated with increased stress fracture development in division one collegiate cross country runners. Participants for this study consisted of 42 collegiate cross country runners at the University of Mississippi. A nutritional assessment consisting of a 3-day food record and measurements of whole body, lumbar spine and hip bone mineral densities using a Dual-Energy X-ray Absorptiometry (DXA) was conducted on each athlete. Each athlete was also asked to answer a demographic questionnaire with questions regarding ethnicity, hometown, smoking status, vitamin/mineral intake, previous stress fracture history, birth control usage …
The Biotic Effects Of Tertiary Geoclimatic Change In The Southern Hemisphere, Stuart Val Nielsen
The Biotic Effects Of Tertiary Geoclimatic Change In The Southern Hemisphere, Stuart Val Nielsen
Electronic Theses and Dissertations
I explore how pre-Quaternary geoclimatic phenomena and geographical heterogeneity influenced sub-continental speciation processes and contemporary biogeographic patterns across the Southern Hemisphere, with particular focus on two regions that have experienced elevated levels of ongoing aridification – sub-Saharan (particularly Southern) Africa and Australia. I used standard methods from the molecular phylogeneticists’ toolbox (e.g. tree building using maximum likelihood and Bayesian approaches, haplotype networks, uncorrected p-distances) combined with environmental niche modeling, morphometric principal components and fossil calibrated molecular dating analyses in order to ascertain the role that Miocene geo-climatic events played in promoting lineage accumulation and diversification through time. I found a …
Genetic And Temporal Variation In Resource Exchange Between An Ectomycorrhizal Fungus, Rhizopogon Occidentalis, And Seedlings Of Pinus Radiata, Mariah Meachum
Genetic And Temporal Variation In Resource Exchange Between An Ectomycorrhizal Fungus, Rhizopogon Occidentalis, And Seedlings Of Pinus Radiata, Mariah Meachum
Electronic Theses and Dissertations
Various economic theories have been adapted to explain the evolutionary persistence of resource exchange mutualisms such as mycorrhizae. The ratio of resources exchanged is an important variable comto all these models. Measuring resource exchange ratios is the first step in testing the hypotheses predicted by these models and will provide insight into resource dynamics of mutualisms. We examined how the carbon, nitrogen and phosphorus resource exchange dynamics between Pinus radiata and an ectomycorrhizal fungus, Rhizopogon occidentalis, varied between native populations of Pinus radiata and over the first 64 weeks of the mycorrhizal mutualism. Using a mycocosm approach, the C:N and …
The Effect Of Pitching With Underweight And Overweight Balls On Pitch Velocity In Collegiate Baseball Pitchers., Hillary Ake
The Effect Of Pitching With Underweight And Overweight Balls On Pitch Velocity In Collegiate Baseball Pitchers., Hillary Ake
Electronic Theses and Dissertations
BACKGROUND: In an effort to improve overhand throw velocity in baseball pitchers, weighted implement training, which utilizes balls that are heavier or lighter than a competition ball, have been employed. Weighted ball programs have previously been used in baseball pitchers ranging from high school to professional with varying ball weights with mixed results (Straub, 1966; Brose and Hanson, 1967; DeRenne, 1985; DeRenne, 1990; van den Tillaar and Ettema, 2011). PURPOSE: To determine the effect of a commercially available weighted ball program on the throwing velocity of collegiate baseball pitchers over the course of an off-season. METHODS: This retrospective study examined …
Does Blood Flow Restriction Applied Post High-Load Exercise Augment Skeletal Muscle Growth Following Eight Weeks Of Training?, Scott Justin Dankel
Does Blood Flow Restriction Applied Post High-Load Exercise Augment Skeletal Muscle Growth Following Eight Weeks Of Training?, Scott Justin Dankel
Electronic Theses and Dissertations
The application of blood flow restriction during low load exercise has consistently been shown to augment muscle hypertrophy which has been attributed to metabolic accumulation. It remains unknown, however, whether metabolites can augment muscle growth independent of further mechanical tension, specifically when maintained post high-load training. Thirteen untrained individuals performed 24 training sessions. The control arm performed one set of elbow flexion (70% 1RM) exercise to volitional fatigue, while the experimental arm performed the same protocol immediately folloby 3 min of blood flow restriction (70% arterial occlusion). Both conditions completed the same volume (3687 vs. 3638 kg) of exercise. There …
Loblolly Pine Genetics Structure Its Mycorrhizal Community, Bridget Joan Piculell
Loblolly Pine Genetics Structure Its Mycorrhizal Community, Bridget Joan Piculell
Electronic Theses and Dissertations
Plant populations are constantly exposed to a multitude of biotic and abiotic environmental selection pressures. The ability of a population to persist in or adapt to its environment is heavily influenced by the genetic underpinnings of the traits involved. Thus, in order to understand patterns in current plant populations, and to predict future populations dynamics, an understanding of the genetic basis of adaptive traits is necessary. For example, genetic correlations between traits (driven by pleiotropy or linkage disequilibrium) could influence how species evolve under multiple, conflicting selection pressures, potentially either constraining or enhancing the adaptation of species to each other. …
The Relationship Of Parental Barriers To Parents Feeding Their Children Health-Promoting, Functional Foods, Jordyn Michelle Thornton
The Relationship Of Parental Barriers To Parents Feeding Their Children Health-Promoting, Functional Foods, Jordyn Michelle Thornton
Electronic Theses and Dissertations
Studies have discovered barriers that prevent parents from feeding children nutritiously. There is sparse information about whether parents intentionally feed their children functional foods, raising the question of whether there are barriers that inhibit parents when feeding their children nutritiously. This study of parents in two Mississippi school districts in 2015 ( n=193) examined the barriers parents face to consuming health-promoting, functional foods as well as the relation of these barriers to feeding their children functional foods. The age group 45–54 was less likely to perceive taste as a barrier (p<.05) to consuming functional foods, while individuals with some college education (p<.05) and individuals with an associate degree (p<.05) were more likely to perceive taste as a barrier. Additionally, the age group 55+ was less likely to perceive availability of food as a barrier (p<.01). Lastly, the females were more likely than males to perceive knowledge as a barrier ; lack of knowledge of foods’ health benefits was significant for the female gender (p<.05) to consuming functional foods. This study also found a significant relationship between parent’s lack of knowledge of health-promoting foods when feeding their children functional foods for specific health benefits. The findings concluded that parents who perceived lack of knowledge as a barrier to consuming functional foods, were more likely to feed their children foods with health benefits for cancer prevention (p<.01), heart health ( p<.05), and other health benefits (p<.01), while not for bone, digestive, and weight health. Further investigation shothat foods beneficial for cancer prevention, heart health, and other health benefits are among food items incorporated in children’s diets through foods such as fruits, vegetables, fortified foods/beverages, etc.
Competitive Effects Of Increased Plant Species Richness And Increased Endemic Versus Native Generalist Species Dominance On The Invasive Grass Microstegium Vimineum During Oak Woodland Restoration, Sean Anthony Moyer
Electronic Theses and Dissertations
The hypothesis that species-rich assemblages are resistant to invasion by non-native species has generated considerable research and controversy. However, the relevance of such research to the conservation of biodiversity is questionable, given that local species richness often does not correlate with regional or global species richness, two metrics undoubtedly important to conservation. Furthermore, species of greater conservation interest (i.e. endemics) and widespread generalist species may compete differentially with non-native invasive species. To test whether plant species richness or species fidelity to a regionally rare habitat were more important in competitively suppressing an invasive species, I established a field competition experiment …
A Study Of The Effectiveness Of Front-Of-Package Nutrition Labels In The Us, Emily Lauren Irvin
A Study Of The Effectiveness Of Front-Of-Package Nutrition Labels In The Us, Emily Lauren Irvin
Electronic Theses and Dissertations
American weight trends have steadily increased over the past years. In efforts to better inform consumers of their food consumption, increasingly front-of-package (fop) food labels are displayed on packaged food items. Fop nutrition labels have become more prevalent in the US to help consumers identify healthier options at the point-of-purchase. This study aimed to evaluate the effectiveness of two current fop labels, the facts up front and the facts up front extended labels. In addition, a generic binary label was created to represent a non-brand associated symbol, which does not currently exist in the US. Participants were randomized to one …
Seasonal Changes In Biomass Of Two Comfreshwater Wetland Plants: Storage Of Nutrients, Emily Kathryn Mccann
Seasonal Changes In Biomass Of Two Comfreshwater Wetland Plants: Storage Of Nutrients, Emily Kathryn Mccann
Electronic Theses and Dissertations
In this study, I quantified differences in above- and belowground biomass and storage of nutrients. I hypothesized that storage of phosphorous would be greater in belowground biomass in the non-growing season compared to the growing. I also hypothesized that the storage of phosphorous would be greater in aboveground biomass in the growing season compared to the non-growing season. Furthermore, I hypothesized that the total amount of nutrients in plant tissue would be greater in the growing season, than the non-growing season. Typha latifolia and Carex lurida were placed in mesocosms at the University of Mississippi Field Station (UMFS) and dosed …
Can Physical Activity Reinforce Nutrition Education? Evaluation Of Physical Activity In The Families In Transformation (Fit), Wellness Program For Children., Meagan Dyan Maloney
Can Physical Activity Reinforce Nutrition Education? Evaluation Of Physical Activity In The Families In Transformation (Fit), Wellness Program For Children., Meagan Dyan Maloney
Electronic Theses and Dissertations
Objective: to determine if physical activity can reinforce nutrition education messages in the families in transformation (fit) program at Healthworks! located in Tupelo, Mississippi. Methods: children ages 7-13 participating in the (fit) program made up the subjects for this study. A control and treatment group were observed using a nutrition reinforcement physical activity and a non-nutrition reinforcement activity during the regular physical activity nights of the (fit) program, and a pre and post nutrition quiz, health habits survey, anthropometric data, and fitness data were obtained pre and post study to determine if the intervention had an impact on the subjects. …
Spine Lifting Biomechanics Between Varying Occupational Activity Levels And Recreational Physical Activity Levels, Caitlin Rose Francis
Spine Lifting Biomechanics Between Varying Occupational Activity Levels And Recreational Physical Activity Levels, Caitlin Rose Francis
Electronic Theses and Dissertations
Background: Moderate to vigorous physical activity as the optimum movement patterns for health have continued to be the dominant focus of health and fitness research. Yet, emerging evidence of deleterious, adverse health effects of prolonged inactivity, independent of regular physical activity, presents a new element to establishing the ideal model of movement patterns for health. The musculoskeletal trunk of the body becomes unbalanced as a result of prolonged inactivity, and a biomechanical analysis can help to identify high-risk loading behavior associated with these unbalances. Moreover, poor spine biomechanics can indicate a need for adjustment to present recommendations for optimum movement …
Parental Awareness, Consumption And Feeding Practices Of Functional Foods, Peter Jewel Weiss
Parental Awareness, Consumption And Feeding Practices Of Functional Foods, Peter Jewel Weiss
Electronic Theses and Dissertations
Functional foods are believed to improve overall health and well-being and reduce the risk of specific diseases. Research has examined adult awareness and consumption of functional foods. However, research on whether parental awareness and consumption of functional foods results in feeding their children functional foods is lacking. Therefore, this study’s objective was to examine relationships between parental awareness and consumption of functional foods, and feeding their children functional foods. Parents of children in two school districts in Mississippi were surveyed (n=202). The section on parental awareness, consumption, and feeding their children consisted of 27 questions featuring 19 functional food components, …
Nemo No More? Spatial Demographic And Population Genetic Analyses Of The Two-Band Anemonefish, Amphiprion Bicinctus, In The Gulf Of Eilat, Red Sea, Jacob Seth Howell
Nemo No More? Spatial Demographic And Population Genetic Analyses Of The Two-Band Anemonefish, Amphiprion Bicinctus, In The Gulf Of Eilat, Red Sea, Jacob Seth Howell
Electronic Theses and Dissertations
Anemonefishes' obligatory mutualism with sea anemones dictates their occurrence on coral reefs. I examined spatial distribution, settlement, habitat usage, and survival patterns of the two-band anemonefish, Amphiprion bicinctus. In a 300 X 30 m study site off the coast of Israel in the Gulf of Eilat, fish and anemone populations were monitored for 13 censuses from October 1996 to August 1997. Based on size, anemonefish were categorized as adults, juveniles, or settlers. Settlers tended to cluster together but displayed significantly dispersed distributions in relation to adult individual fish and breeding pairs. Adult and juvenile anemonefish associated more with, and exhibited …
Influence Of Plant Species, Location, And Seasonality On Rhizosphere Bacterial Communities In Freshwater Wetlands, Hakchul Lee
Influence Of Plant Species, Location, And Seasonality On Rhizosphere Bacterial Communities In Freshwater Wetlands, Hakchul Lee
Electronic Theses and Dissertations
Plant-associated microbes influence plant functions, including development and growth and abiotic stress tolerance. Rhizosphere microbial communities have been shown to vary according to differences in wetland vegetation. Owing to the complexity of factors influencing soil microbial community structure, a greater knowledge of the relationship between rhizosphere microbial communities and different types of plant species will lead to a deeper understanding of plant-microbe interactions in wetlands. Thus, the purpose of my research was to determine the influence of plant species on rhizosphere microbial communities from different freshwater wetlands. The spatial variability, associated with different wetland sites, of rhizosphere microbial communities was …
Payer Perspectives On Preemptive Pharmacogenetic Testing, Nicholas Keeling
Payer Perspectives On Preemptive Pharmacogenetic Testing, Nicholas Keeling
Electronic Theses and Dissertations
Purpose: As preemptive pharmacogenetics expands in the academic healthcare setting, further study is needed to assess the views of additional stakeholders in the marketplace on this technology and the barriers and facilitators to their uptake. The purpose of this study is to investigate the perspectives and opinions about coverage policies for preemptive pharmacogenetic testing of third-party payers. Methods: A qualitative study utilizing a blended inductive and directed approach was conducted. A screener survey determined interview eligibility as well as demographic data. Semi-structured interviews were conducted with payers from organizations of varying structure and beneficiary populations. Meaning units and codes were …
Community Ecology Of Soil Microbes In Southeast Usa Oak-Pine Woodlands, Ann L. Rasmussen
Community Ecology Of Soil Microbes In Southeast Usa Oak-Pine Woodlands, Ann L. Rasmussen
Electronic Theses and Dissertations
Soil microbial communities can have important effects on plant growth and plant community ecology; however, the relationships between trees and soil microbial communities are still relatively poorly understood. Here i examine several of these relationships. Chapter 1 examines how ecological restoration and environmental conditions affect the community composition and enzyme activities of Ectomycorrhizal fungi (emf). Chapter 2 considers whether host specificity in emf structures taxa occurrence on oaks and pines, and chapter 3 investigates how ash addition affects oak seedling growth and the soil bacterial community. I found that while wildfire lowered emf diversity, prescribed burning did not. Ectomycorrhizal root …
Stress, Sexual Signaling, And Alternative Mating Tactics In Male Green Treefrogs, Hyla Cinerea, Sarah Crocker-Buta
Stress, Sexual Signaling, And Alternative Mating Tactics In Male Green Treefrogs, Hyla Cinerea, Sarah Crocker-Buta
Electronic Theses and Dissertations
This thesis examines how the endocrine stress response mediates the expression of courtship signals and alternative mating tactics in male green treefrogs, Hyla cinerea. Males of this species produce acoustic signals that stimulate production of the stress hormone corticosterone (CORT) in vocal competitors, suggesting a role of CORT in intrasexual competition. I predicted that modulation of CORT level during intraspecific contests plays a pivotal role in regulating the expression of male courtship signals and behavior. Consistent with this prediction, CORT administration to calling males, simulating CORT production during male vocal contests, decreased attractiveness by compromising energetic investment in vocalization, increasing …
Biochemical Composition Of Caribbean Gorgonian Corals And Their Symbiosis Under Ambeint And Stressful Conditions, Kartick Prakash Shirur
Biochemical Composition Of Caribbean Gorgonian Corals And Their Symbiosis Under Ambeint And Stressful Conditions, Kartick Prakash Shirur
Electronic Theses and Dissertations
Gorgonian corals are the dominant benthic fauna on Caribbean reefs. Unlike scleractinian corals, gorgonian abundance on these reefs has remained stable or has increased. Therefore, to predict how climate change will affect the reef community, it is essential to understand gorgonian physiology under ambient and stressful situations. Under ambient conditions, eight gorgonian species hosted different clade B Symbiodinium, and in two gorgonian species in which the bacterial microbiomes were investigated, two distinct communities were found. In the eight gorgonian species, skeletal content varied from 75-96%, with those having more tissue also having more Symbiodinium density within their branches. The composition …