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Articles 1 - 30 of 498
Full-Text Articles in Biology
The Effects Of Anti-Gdnf On The Sensory And Autonomic Nervous System In The Heart, Tryphosa Konadu
The Effects Of Anti-Gdnf On The Sensory And Autonomic Nervous System In The Heart, Tryphosa Konadu
Honors Theses
Heart disease is the number one leading cause of death; about 1 in every five deaths is due to heart disease. “Heart disease” is a catch-all phrase that encompasses a variety of conditions that affect the heart’s structure and function. Many of these symptoms can be attributed to dysfunction within the parasympathetic, sympathetic, and sensory nervous systems. Neurotrophic factors like GDNF (Glial cell line-derived neurotrophic factor), BDNF (Brain-derived neurotrophic factor), and NGF (Nerve growth factor) promotes neuronal survival, and regeneration of the nerve fibers of the heart, especially sensory and autonomic nerve fibers. Studies have suggested that increased expression of …
Identifying And Coping With Failure In Human Anatomy & Physiology I And Ii Students, Annie R. Mueller
Identifying And Coping With Failure In Human Anatomy & Physiology I And Ii Students, Annie R. Mueller
Honors Theses
Human Anatomy and Physiology (A&P) is a two-semester course that focuses on the structure and function of the human body systems. For many students, A&P could be their first challenging undergraduate course and their first experience with academic difficulty. Students must learn to adapt their study habits and respond productively to academic failure. The purpose of this study was to examine how students in the A&P courses at the University of Mississippi perceive and cope with academic failure, as well as to evaluate the effectiveness of an intervention method. Students enrolled in BISC 206 and BISC 207 participated in three …
Impacts Of Salinity On Microbial Enzyme Activity In Coastal Waters, Natali Ariyoshi
Impacts Of Salinity On Microbial Enzyme Activity In Coastal Waters, Natali Ariyoshi
Honors Theses
Microbial extracellular enzymes are critical for the breakdown of organic matter and nutrient cycling in aquatic ecosystems. Extracellular enzyme activity serves as an indicator of nutrient turnover rates, metabolic states, and nutrient limitations within an ecosystem. Coastal ecosystems are especially dynamic as the influx of freshwater from inland runoff or seawater intrusion from storm surges can lead to fluctuations in salinity which can restructure microbial communities and alter enzymatic activity. Despite the ecological significance of these changes, few studies have explored the effects of short-term salinity shifts on microbial extracellular enzyme activity in coastal waters. This study investigated the effects …
Studying More, Not Less: Rethinking Test Anxiety In Undergraduate Biology Courses, Kailey E. Reeves
Studying More, Not Less: Rethinking Test Anxiety In Undergraduate Biology Courses, Kailey E. Reeves
Honors Theses
This study investigates the relationships among test anxiety, study behaviors, and metacognitive evaluation in undergraduate biology courses. While prior research has established that study strategies and metacognition influence academic performance, less is known about how these factors interact with test anxiety in undergraduate Biology courses. Guided by the student approaches to learning (SAL) and metacognition frameworks, this study examines whether test anxiety is associated with the type and number of study strategies students use, as well as their ability to evaluate their own learning and preparedness. Using a convergent parallel mixed-methods design, data was collected from 205 students enrolled in …
A Survey Of Lichen Native To Three Of Mississippi’S National Forests, William S. Granberry Iii
A Survey Of Lichen Native To Three Of Mississippi’S National Forests, William S. Granberry Iii
Honors Theses
Lichens are a major part of the environment for telling the air quality and the impact humans have on the environment. These signs go into how many species of lichen are present in a general area, and there has been a lack of a list of lichens that call Mississippi their home. The goal of this research is to help create this list through a survey of lichen in three of Mississippi’s National Forests: DeSoto, Homochitto, and Holly Springs. These three forests are ideal because they cover differing ecosystems and are in different parts of the state, heightening the chance …
Community Composition Of Antibiotic-Resistant Bacteria On The Mississippi Gulf Coast, Marisa Martin, Colin Jackson
Community Composition Of Antibiotic-Resistant Bacteria On The Mississippi Gulf Coast, Marisa Martin, Colin Jackson
Honors Theses
The Mississippi Gulf Coast is an important resource for transportation, economic development, and recreation. Given its economic and cultural importance, it is crucial to maintain clean and safe conditions along the coast for public health, but other than routine beach monitoring, few studies have examined microbial contamination of coastal waters in this region. This study aimed to determine the quantity, composition, and distribution of bacteria resistant to six different antibiotics (Vancomycin, Kanamycin, Tetracycline, Ciprofloxacin, Erythromycin, or Amoxicillin) in seawater at seven public beaches along the Mississippi Gulf Coast. No bacteria resistant to Ciprofloxacin were detected, and bacteria resistant to Kanamycin …
Beyond The Bug: How The Covid-19 Pandemic Exposed Longstanding Systemic Failures In The United States Workforce And Economy, Abbey M. Markley
Beyond The Bug: How The Covid-19 Pandemic Exposed Longstanding Systemic Failures In The United States Workforce And Economy, Abbey M. Markley
Honors Theses
The purpose of this thesis is to investigate and discuss how longstanding systemic failures in the United States exacerbated the effects the COVID-19 pandemic had on the American economy, essential healthcare workers, and overall public trust in institutions. A review of the existing literature surrounding this topic and the subsequent results of various studies were used to compose this thesis. The United States has a painful lack of worker protections and tends to view members of its workforce as expendable, even in times such as pandemic when they are deemed essential. Healthcare workers in particular faced increasing threats to their …
Antibiotic Resistance Patterns In Bacterial Isolates From Mississippi Gulf Coastal Environments, Lawler F. Horn
Antibiotic Resistance Patterns In Bacterial Isolates From Mississippi Gulf Coastal Environments, Lawler F. Horn
Honors Theses
Coastal environments host diverse microbial communities that play essential ecological roles but may also serve as reservoirs for antibiotic-resistant bacteria. This study investigated patterns of antibiotic resistance in microbial isolates collected from public beaches along the Mississippi Gulf Coast. A total of 143 bacterial isolates exhibited growth and were included in antibiotic susceptibility screening. High levels of antibiotic resistance were observed, with 137 of 143 isolates showing growth on vancomycin, 124 on amoxicillin, and 102 on erythromycin. Resistance to kanamycin (19/143 isolates) and tetracycline (33/143) was less common. Multidrug resistance was widespread, with 101 isolates (70.6%) resistant to three or …
Discovering The Genetics Underlying Speciation Traits In Heuchera (Coral Bells), Tajinder Singh
Discovering The Genetics Underlying Speciation Traits In Heuchera (Coral Bells), Tajinder Singh
Honors Theses
Hybridization is a key evolutionary mechanism for generating biological diversity, ultimately shaping diversification and adaptation of plant lineages in natural and agroecosystems. Our understanding of the frequency, distribution, and significance of hybridization is rapidly increasing, but the external driving forces that dictate why certain species hybridize, and others do not remain obscure. The physical traits that shape gene flow and trait sharing among species are likely to be among the key factors that directly control hybridization. Gene flow in most plants is mediated by pollinating insects and thus by pollination syndromes, which are suites of floral traits that have evolved …
Modulating Acute Stress Reactivity: Behavioral Interventions And Caffeine-Linked Stress Physiology In College Students, Kaitlyn Smith
Modulating Acute Stress Reactivity: Behavioral Interventions And Caffeine-Linked Stress Physiology In College Students, Kaitlyn Smith
Honors Theses
College students frequently rely on caffeine to manage academic demands, yet its physiological and psychological effects on acute stress remain poorly understood. Although caffeine is known to increase cardiovascular arousal and self‑reported anxiety, little research has compared different caffeine sources within the same individuals or examined whether brief behavioral interventions can buffer these effects. Self‑affirmation, a short writing exercise centered on personal values, has been shown to reduce stress reactivity, but its interaction with caffeine‑induced arousal has not been tested. This within‑subjects study examines how coffee, energy drinks, and a no‑caffeine control influence acute cardiovascular and self‑reported stress responses, and …
The Impact Of Sex Education On College Student’S Perceptions Of Sexual Taboos, Noel Gamon
The Impact Of Sex Education On College Student’S Perceptions Of Sexual Taboos, Noel Gamon
Honors Theses
The purpose of this research is to explore how college students' differing levels of sex education are associated with their views about sexual behavior, particularly behaviors defined as taboo. In comparison to 25 years ago, adolescents are less likely to receive important sex education today; and are unlikely to receive valuable information until after their first sexual experience. Conventionally, the benefits of a sex education program are linked with its ability to lower STI rates, unplanned pregnancies, unwanted behavior, etc. Sexual taboos are sexual practices excluded from the hegemonic heterosexual monogamous relationship model. Presently, society acknowledges a wider range of …
G1p3 Dysregulates Interferon-Stimulated Gene Expression In Er (+) Breast Cancer Cells, Karina Santana
G1p3 Dysregulates Interferon-Stimulated Gene Expression In Er (+) Breast Cancer Cells, Karina Santana
Honors Theses
Even with advances in diagnosis and treatment, breast cancer remains the second leading cause of cancer-related death in women, with nearly 90% of fatalities linked to drug resistance driven by metastasis and recurrence. G1P3, an anti-apoptotic mitochondrial protein, is upregulated in breast cancer and has been associated with increased metastatic potential and poor prognosis. Recent findings show that G1P3 enhances interactions between Rab5-containing endosomes (RCEs) and mitochondria, and emerging evidence suggests that mitochondria play a critical role in initiating interferon (IFN) responses. Based on this, we hypothesized that G1P3-mediated interactions between RCEs and mitochondria promote interferon-stimulated gene (ISG) expression in …
Behavioral Analyses Of Reproductive Behaviors Of The River Dolphin Tucuxi (Sotalia Fluviatilis), Jaden Wee
Behavioral Analyses Of Reproductive Behaviors Of The River Dolphin Tucuxi (Sotalia Fluviatilis), Jaden Wee
Honors Theses
This research project investigates the reproductive behavior of the tucuxi river dolphin (Sotalia fluviatilis), whose mating strategies are poorly documented. In 2022, over Lake Amanã, Brazil, Dr. Gonzalez-Socoloske captured drone footage of a natural mating event involving multiple tucuxi individuals, which provided us a rare opportunity to study their behavior. Using Behavioral Observation Research Interactive Software (BORIS), behavioral states and point events, such as intromission, proximity, synchrony, and periods of non-visibility, were coded and quantified, enabling statistical and graphical analyses that characterize the tucuxi’s social and reproductive interaction patterns. The results indicate that 30 intromission events occurred within the 13-minute …
Comparison Of Levels Of Bmi, Stress, And Depression Of Women During The Prenatal Period Relative To Their Activity Levels, Kalayna King
Comparison Of Levels Of Bmi, Stress, And Depression Of Women During The Prenatal Period Relative To Their Activity Levels, Kalayna King
Honors Theses
This study aimed to analyze the relationships between activity levels, Body Mass Index (BMI), stress levels, and depression symptoms in obese pregnant women in Arkansas. Two separate exercise intervention studies were combined in this analysis to ultimately give a sample size of 293 pregnant women who were randomized into standard of care group (control) and an exercise group (treatment/experimental) (n = 115 and n = 178, respectively). Women in the control groups were instructed to independently continue to follow the physical activity guidelines recommended by their gynecologist, whereas the experimental groups participated in a combination of aerobic and resistance exercise …
Developing A Range Prediction For The Imperiled Florida Harvester Ant (Pogonomyrmex Badius) Using Species Distribution Modeling, Noah Williamson
Developing A Range Prediction For The Imperiled Florida Harvester Ant (Pogonomyrmex Badius) Using Species Distribution Modeling, Noah Williamson
Honors Theses
The Florida Harvester Ant (Pogonomyrmex badius) was once widespread and commonplace throughout the sandhills of the Southeastern United States, providing key ecosystem services, such as seed dispersal and soil aeration. Over recent decades, however, Florida Harvester Ant populations have declined in some areas. Current literature postulates that Red Imported Fire Ants (RIFA), and the insecticides used to manage them, as well as further human encroachment onto their habitat, all likely contributed to Florida Harvester Ant population declines. Thus, to better protect these organisms, pursue data-driven conservation efforts, and guide management practices, more information about their nest site selection, as well …
An Insight Into The Venom Gland Proteome Of The Two-Spined Trap-Jaw Ant, Odontomachus Haematodus, Aaron Morgan
An Insight Into The Venom Gland Proteome Of The Two-Spined Trap-Jaw Ant, Odontomachus Haematodus, Aaron Morgan
Honors Theses
Ants are ecologically important and highly abundant organisms, playing key roles in many ecosystems. One recently introduced species in the southeastern United States is Odontomachus haematodus (the two-spined trap-jaw ant), a South American native that has often been misidentified, contributing to limited research on its biology and venom composition. This study aimed to provide the first detailed characterization of the venom apparatus and proteome of O. haematodus. Specimens were collected and dissected, and venom-related proteins were extracted and analyzed using SDS-PAGE and tandem mass spectrometry (MS/MS-ESI). Confocal microscopy was also used to visualize the sting apparatus, including F-actin filaments and …
Carboxypeptidase O Expression In Ku812 Basophil Cells Decreases Upon Degranulation, Etien Balorda
Carboxypeptidase O Expression In Ku812 Basophil Cells Decreases Upon Degranulation, Etien Balorda
Honors Theses
Basophils are leukocytes that mediate inflammatory responses through the exocytosis of granules containing enzymes and inflammatory mediators. Carboxypeptidase O (CPO) is a protease with Cterminal acidic amino acid specificity and is expressed in basophils. CPO expression and localization were assessed in KU812 basophil cells via Western blotting and immunocytochemistry. CPO expression decreased upon degranulation and is localized to cytosolic puncta. These data suggest that CPO may be localized in basophil granules and released upon degranulation.
The Ethical Limits Of Physician Autonomy In Reproductive Medicine, Isabel Martens
The Ethical Limits Of Physician Autonomy In Reproductive Medicine, Isabel Martens
Honors Theses
In vitro fertilization is a relatively new medical practice that helps people who face infertility be able to reproduce. Reproductive medicine providers face ethical dilemmas often in their field, only some of which have standards of care. There are questions in the medical landscape pertaining to physician autonomy versus patient autonomy, which heavily apply to reproductive medicine providers. Patient autonomy is highly valued in medical ethics; however, physician autonomy should also be considered. When a physician decides who can and cannot reproduce, ethical considerations must be followed to maintain the practice of reproductive autonomy. Limited policies exist that manage reproductive …
A Phylogenetic Analysis Of Avian-Associated Ixodes Scapularis & Implications For Lyme Disease, Nora Correiro
A Phylogenetic Analysis Of Avian-Associated Ixodes Scapularis & Implications For Lyme Disease, Nora Correiro
Honors Theses
Lyme disease, caused by the bacterium Borrelia burgdorferi and transmitted by the blacklegged tick Ixodes scapularis, is the most common vector-borne illness in the United States. Whereas Lyme disease is concentrated in the northeastern US, I. scapularis exists in the southeast as well, and the ticks in these regions generally separate into northern and southern evolutionary lineages. Although recent analyses suggest unidirectional and limited gene flow from north to south due to behavioral, ecological, and environmental barriers, the mechanisms underlying the persistence of this limited gene flow remain unclear. This study examines whether bird-mediated dispersal may facilitate south-to-north gene …
Exploring The Potential Of Martian Agriculture: Assessing Viability And Nutritional Composition Of Plants Cultivated In Martian Regolith, Abigail Ross
Honors Theses
In addition to sunlight and water, plants can utilize a small number of nutrients from the soil to biosynthesize all the materials that are needed for growth and development. However, plants require an environment where they are able to obtain those nutrients, such as iron, magnesium, potassium, sulfur, and nitrogen. Environmental factors determine the types and accessibility of nutrients available to plants. Plants then take up these nutrients from the soil to aid in biological mechanisms and the synthesis of important molecules needed for growth and development. Ascorbic acid, commonly known as Vitamin C, is a vital molecule that is …
Synthesis Of Antibody Functionalized Polyaniline/Polystyrene/N-Gqds Composite Fibermats For Sweat Based Cortisol Biosensing Applications, Ashwin James
Honors Theses
Noninvasive, wearable biosensors capable of detecting stress biomarkers in sweat require electrodes that are flexible, conductive, insoluble in water, and highly sensitive at low concentrations of analyte. In this work, bovine serum albumin blocked and anti-cmab immobilized nitrogen doped graphene quantum dots integrated polyaniline/polystyrene composite fibermat electrodes (BSA/Anti-Cmab/N-GQDs/PANI/PS electrodes) were synthesized and evaluated as a potential platform for an electrochemical cortisol biosensor in sweat based systems. Polyaniline was utilized in order to provide electrical conductivity, while polystyrene served as a carrying polymer for mechanical support and its hydrophobicity. Composite fibermats were manufactured through Forcespinning™, followed by a secondary polyaniline graft …
Analyzing The Impact Of Diet On Dusky Gopher Frog (Lithobates Sevosus) Development In Head Start Programs, Mckalyn Nelson
Analyzing The Impact Of Diet On Dusky Gopher Frog (Lithobates Sevosus) Development In Head Start Programs, Mckalyn Nelson
Honors Theses
Species are constantly impacted by human activity, directly or indirectly. One critically endangered species under investigation is the dusky gopher frog (Lithobates sevosus), which is an endemic species of frog found in the southeastern United States. Historically found from Louisiana to Alabama, a drought in 2002 narrowed the dusky gopher frog range even further. Head start programs have been shown to be effective in increasing population numbers; however, there is not much published data on the effectiveness of captive rearing diets for these programs. The dusky gopher frog head start program at the University of Southern Mississippi’s Lake …
Effects Of Cytochalasin D On Motor Function In Drosophila, Airyel Noguera
Effects Of Cytochalasin D On Motor Function In Drosophila, Airyel Noguera
Honors Theses
Actin proteins play an important role in microfilaments, one of the three components of the cytoskeleton of the cell. The actin protein is responsible for cellular functions such as with their role in neuromuscular junctions. The dynamics of these proteins can be further explored with manipulation of polymerization through the treatment of a biochemical drug, Cytochalasin D. This fungal toxin caps the ends of actin filaments, destabilizing them by inhibiting G- and F-actin monomers from binding. Treating Drosophila in their early embryonic stage with this drug after permeabilization can give insights on the importance of actin proteins at neuromuscular junctions …
Impacts Of Polyploidization On Endocrine Regulation And Vocalization In The Gray Treefrog Complex, Avery Thigpen
Impacts Of Polyploidization On Endocrine Regulation And Vocalization In The Gray Treefrog Complex, Avery Thigpen
Honors Theses
Comparative genomics data suggest that vertebrates are descendants of ancestral polyploids and that historical polyploidization events fueled evolutionary innovations. For example, polyploidization can modify gene expression patterns and/or increase gene mutation rates to alter the phenotype. While considerable emphasis has been placed on the evolutionary impact of ancient polyploidization events, less is known regarding phenotypic modifications in extant polyploids. I examined circulating levels of adrenal glucocorticoids and gonadal steroids in the diploid-tetraploid gray treefrog complex to understand how polyploidization has impacted hormonal regulation. Furthermore, I examined the relationships between levels of these hormones and acoustic signals to examine if and …
Academic Burnout In Human Anatomy & Physiology I Students, Shivani Shukla
Academic Burnout In Human Anatomy & Physiology I Students, Shivani Shukla
Honors Theses
Human Anatomy and Physiology I is the study of the function and structure of the human body. It is a challenging class that many students have to take for their undergraduate degree. Due to the vast information that is given in this complex class, students can struggle with understanding the material and knowing how to study thus leading to burnout in the course. Understanding why students undergo burnout in their courses could uncover ways that professors and institutions could help the students to prevent burnout. The goal of this study was to determine the level of burnout in Human Anatomy …
Genomic Analysis Of The Lyme Disease Vector Across Virginia’S Spatial Expansion Front, Amy Jablonski
Genomic Analysis Of The Lyme Disease Vector Across Virginia’S Spatial Expansion Front, Amy Jablonski
Honors Theses
Lyme disease is the most common vector-borne disease in the United States and is expanding with rising incidence in Virginia . This study investigates populations of lxodes scapularis across Virginia using RAD-seq to analyze SNPs from ticks collected in seven Virginia counties and four U.S. states as references . Results show a clear genetic split between western and eastern Virginia ticks . These results follow previously noted patterns in regional differences in Lyme disease risk.
Ghosts In Glass: Ghost Crabs As Judges Of Glass Sand For Coastal Restoration, Emily Parrish
Ghosts In Glass: Ghost Crabs As Judges Of Glass Sand For Coastal Restoration, Emily Parrish
Honors Theses
Over 60% of the Gulf of Mexico coastline is actively eroding, which has resulted in thousands of miles of lost coastline over the last 100 years. This drastic loss of coastal land highlights the dire need for coastal restoration across the entirety of the Gulf Coast. A vital aspect of restoring these eroded areas is replenishing eroded substrate, traditionally conducted through offshore dredging of substrates which comes with high economic and ecological costs. Recycled glass sand may be able to fill this role and reduce our reliance on dredging while lowering the amount of glass waste entering landfills each year. …
Synthetic Modification Of Agrobacterium To Inhibit Plant Pathogenesis, Rosemala Agarwala
Synthetic Modification Of Agrobacterium To Inhibit Plant Pathogenesis, Rosemala Agarwala
Honors Theses
Crown Gall disease caused by Agrobacterium is a leading cause of plant damage and current solutions used to prevent the disease are not as effective. This research aims to use a synthetic biology approach to design a plasmid that upregulates Curdlan, a molecule that activates plant defenses, when the bacteria senses a wounded plant. Thus this research uses a synthetic biology approach to develop a biocontrol agent for Crown Gall disease. This research also looks at the transferability of the sugar phenol sensing mechanism in Agrobacterium, which is needed for plant pathogenesis.
Substrate Complexity Is Not Correlated With Skin Pattern Complexity In Callistoctopus Furvus, Emily Lekas
Substrate Complexity Is Not Correlated With Skin Pattern Complexity In Callistoctopus Furvus, Emily Lekas
Honors Theses
Callistoctopus furvus is an understudied, nocturnal octopus that inhabits shallow, subtropical waters in the western Atlantic. This species relies on camouflage to blend in to diverse environments to escape predators. To understand the relationship between substrate and skin patterning in this species, we used second-by-second analysis of video data recorded in the field. We compared frequencies of four substrate types (sand, rock, algae, and seagrass) ranked by contrast across ten skin patterns displayed by C. furvus. Chi-squared analyses showed significant results that the four substrates were unevenly represented in every skin pattern. However, the data did not support our hypothesis …
A Cross-Taxa Comparison Of Avian Telomere Dynamics, Age, And Lifespan, Benjamin Konigsberg
A Cross-Taxa Comparison Of Avian Telomere Dynamics, Age, And Lifespan, Benjamin Konigsberg
Honors Theses
When eukaryotes replicate cells throughout their life, the end regions of chromosomes naturally degrade as a result of the 5' to 3' directionality of DNA polymerase. There is a point when the chromosome is too damaged to provide normal cellular functions, so the cell will die. Telomeres act as a buffer by providing repetitive sequences of non-coding nucleotides. While telomeres do shorten during replication events, the enzyme telomerase can extend telomeres to prevent senescence. Telomere lengths vary between individuals based on different stressor and stress mitigation. Telomeric rate of change is a metric that can capture telomerase activity by measuring …