Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Theses and Dissertations

Discipline
Institution
Keyword
Publication Year
File Type

Articles 1201 - 1230 of 14985

Full-Text Articles in Entire DC Network

Assessing Northern Bobwhite Habitat Use And Short-Term Response To Prescribed Fire In An Intensively Managed Longleaf Pine Ecosystem, Jeffrey Martin Grayum May 2024

Assessing Northern Bobwhite Habitat Use And Short-Term Response To Prescribed Fire In An Intensively Managed Longleaf Pine Ecosystem, Jeffrey Martin Grayum

Theses and Dissertations

Effective conservation requires reliable knowledge of habitat selection and data describing the target species’ response to prominent management techniques. Herein, I describe northern bobwhite breeding season resource selection in an intensively managed longleaf pine ecosystem and investigate the influence of post-fire succession and days-since-fire on bobwhite use of recently burned areas. I recorded bobwhite locations three times per week and surveyed recently burned areas twice daily. I found that bobwhite prefer natural pine woodlands burned the current year and pine plantations, hardwood pine forest, and shrub/scrub communities burned 1-2 years ago. Bobwhite avoided natural pine woodlands burned 1-2 years ago, …


Evaluating The Effects Of Poultry Litter Amendments On Escherichia Coli Populations, Virulence Genes, And Antimicrobial-Resistance Genes In Poultry Litter During A Live Grow-Out., Faith Henson May 2024

Evaluating The Effects Of Poultry Litter Amendments On Escherichia Coli Populations, Virulence Genes, And Antimicrobial-Resistance Genes In Poultry Litter During A Live Grow-Out., Faith Henson

Theses and Dissertations

Poultry litter can harbor pathogenic bacteria, including avian pathogenic Escherichia coli (APEC). Applying litter amendments is one strategy to improve bird health and potentially reduce pathogens. Biochar and PLT were applied as litter amendments in a live bird trial to study their effects on E. coli populations, APEC virulence genes (VAG), and antimicrobial resistance (AMR) genes. Samples were collected at days 0, 17, 29, and 41 to enumerate E. coli and store bacterial isolates for antimicrobial-resistance gene analysis. Data analysis showed litter amendments did not significantly affect overall E. coli populations. Grow-out time impacted E. coli populations, with reductions occurring …


Evaluating The Vertical Transmission Potential Of Salmonella Reading In Broiler Breeders, Abubakar Shitu Isah May 2024

Evaluating The Vertical Transmission Potential Of Salmonella Reading In Broiler Breeders, Abubakar Shitu Isah

Theses and Dissertations

Salmonellosis, a significant foodborne illness in humans, is caused by Salmonella, with poultry and poultry products acting as significant reservoirs and sources of human infection. Salmonella enterica subspecies enterica serotype Reading has recently emerged as a notable foodborne pathogen responsible for extensive multistate human outbreaks in North America. This study focused on evaluating the capacity of the emerged serotype to colonize broiler breeder reproductive tissues and potentially contaminate eggs, indicating the potential for vertical transmission. For this investigation, two Salmonella Reading strains were utilized, one associated with outbreaks and another non-outbreak strain. Both strains were initially modified with bioluminescent marker …


Identifying Potential Antibiotic Uptake Mechanisms Of Streptococcus Pneumoniae, Yuri Laguna Terai May 2024

Identifying Potential Antibiotic Uptake Mechanisms Of Streptococcus Pneumoniae, Yuri Laguna Terai

Theses and Dissertations

Streptococcus pneumoniae (pneumococcus) is a commensal gram-positive colonizer of the human nasopharynx capable of causing diseases including otitis media, pneumonia, bacteremia, and meningitis. Although it is often a harmless colonizer, there is a high rate of mortality and morbidity among the immunocompromised, elderly, and young children. While these infections can often be treated with antibiotics, resistance to numerous antibiotics is increasing. Antibiotic resistance is a well-studied dilemma; however, little information is known of how bacteria take up certain antibiotics. Because most antibiotics cannot diffuse freely across the bacterial cell wall, we hypothesize that metabolite transport proteins participate in the uptake …


Adolescent Black Girls Anger And Aggression: What We Can Learn, Dawn Michelle Latiker May 2024

Adolescent Black Girls Anger And Aggression: What We Can Learn, Dawn Michelle Latiker

Theses and Dissertations

This case study aimed to understand adolescent Black girls’ response when becoming angry as related to verbal and physical aggression. The study focused on the triggers for anger of 7 Black girls, current strategies in place at the school to help manage their anger and aggression, and it sought to determine if the girls were able to recognize when they became angry. This information is of importance because the school suspension rate has increased for Black girls (Morris, 2013), and there are limited studies to help them manage their anger in order to feel accepted in schools, develop relationships in …


Determine The Composition Of Spoilage Bacteria And Their Dynamic Changes In Fresh Broiler Breast Meat During Refrigerated Storage, Dylan Joseph Lesak May 2024

Determine The Composition Of Spoilage Bacteria And Their Dynamic Changes In Fresh Broiler Breast Meat During Refrigerated Storage, Dylan Joseph Lesak

Theses and Dissertations

Traditional plating methods for bacterial enumeration can be limited, but the development of high-throughput DNA sequencing, such as Oxford Nanopore Technologies (ONT), can provide rapid and highly specific alternative for species-level identification. In this study, ONT amplicon sequencing was applied to fresh broiler breast meat to identify their bacterial composition and monitor their dynamic changes. The sequencing data were complemented by sensory panels, physicochemical analysis, and traditional plating methods. Over time, the bacterial diversity decreased within and across samples. By the end of shelf-life, Pseudomonas fragi, Pseudomonas lundesis, and Brochothrix thermosphacta became the most prevalent species. These bacteria were associated …


Topical Ropivacaine Hydrochloride 0.5% And Lidocaine Hydrochloride 2% Significantly Reduce Corneal Sensitivity Without Short-Term Negative Side Effects In Horses, Michael Minaldi May 2024

Topical Ropivacaine Hydrochloride 0.5% And Lidocaine Hydrochloride 2% Significantly Reduce Corneal Sensitivity Without Short-Term Negative Side Effects In Horses, Michael Minaldi

Theses and Dissertations

Local anesthesia is critical for performing corneal procedures in horses. Studying non- ophthalmic local anesthetics for corneal use is necessary because the efficacy and availability of ophthalmic preparations may be limited. This study aimed to evaluate the effects and potential adverse consequences of ropivacaine hydrochloride 0.5% and lidocaine hydrochloride 2% when applied topically to the corneas of eight healthy equids compared to an eyewash control. Data collection occurred over one week. Corneal touch threshold (CTT) was assessed via Cochet-Bonnet esthesiometry before and at pre-determined times after medication application. Ocular toxicity was assessed immediately following each trial and prior to the …


Exploring Homeschool Parents’ Willingness To Incorporate Agriculture Into Curriculum: Parental Perceptions Of Teaching Agricultural Education., Allyson Moore May 2024

Exploring Homeschool Parents’ Willingness To Incorporate Agriculture Into Curriculum: Parental Perceptions Of Teaching Agricultural Education., Allyson Moore

Theses and Dissertations

Students in public and private schools have a greater opportunity to receive access to agriculture education, yet there is a group of students who are being left behind in the opportunity to receive agriculture literacy. Many students do not have access to agriculture education, yet there is a strong urge for graduates with agricultural degrees. There is a lack of research in homeschooled students receiving agriculture curriculum in their studies. As the population continues to steadily grow, the need for agriculturally literate consumers has increased. Promoting students' ability to receive agriculture curriculum will build agriculture literacy within the education system. …


Where’S The Food? Food Insecurity And Black Food Geographies In The Mississippi Delta, Taylor Patterson May 2024

Where’S The Food? Food Insecurity And Black Food Geographies In The Mississippi Delta, Taylor Patterson

Theses and Dissertations

This thesis examines the historical and contemporary roots of food apartheid in the Yazoo-Mississippi Delta, while employing a Black Food Geographies approach to highlight and interpret the lived experiences of people in the Delta. This work draws on interviews and participant observation in Clarksdale, Mississippi, to decenter popular narratives around food insecurity and region and instead center the ideas and opinions of people directly impacted. The thesis highlights Black Deltans’ experiences and understandings of food and foodways to provide a nuanced picture of how residents interpret, negotiate, and challenge the region’s unequal food geographies in light of a longer history …


Campylobacter Jejuni Survival Under Environmental Stressors, Diksha Pokhrel May 2024

Campylobacter Jejuni Survival Under Environmental Stressors, Diksha Pokhrel

Theses and Dissertations

Campylobacter jejuni is microaerophilic pathogen and is one of the leading causes of acute diarrhea in the United States. Despite being a microaerophilic pathogen, C. jejuni continues to endure within the domain of food production, especially in poultry processing. In this study, we evaluated the aerotolerance, biofilm forming abilities, and genetic diversity of C. jejuni isolates previously obtained from commercial broiler processing plants. Out of 40 isolates, 25 (62.5%) were aero–sensitive (AS), 10 (25%) were intermediately aerotolerant (IAT), and 5 (12.5%) were hyper aerotolerant (HAT). The isolates belonged to four clonal complexes (CCs) and six sequence types, with the majority …


Diet Quality, Food Insecurity, And Periodontal Disease In Hispanic Men In The United States, Bennett R. Pope May 2024

Diet Quality, Food Insecurity, And Periodontal Disease In Hispanic Men In The United States, Bennett R. Pope

Theses and Dissertations

Food insecurity, poor diet quality, and periodontal disease are critical problems in the United States, yet limited studies examine how these three conditions are related. Men and the Hispanic population suffer a disproportionate burden of periodontal disease and are understudied groups. Using NHANES data from 2015 to 2018 and the HEI-2015, this study describes the prevalence of men’s periodontitis and its association with food insecurity and diet quality. The final sample was 4,582 men, aged 30 years or older, of whom 1,130 were Hispanic. Odds ratios were calculated via multivariable logistic regression models. Very low food security significantly increased the …


Investigating The Pretesting Effect Under Cognitive Load Through Increased Playback Speed, Oscar Ramirez Perez May 2024

Investigating The Pretesting Effect Under Cognitive Load Through Increased Playback Speed, Oscar Ramirez Perez

Theses and Dissertations

Pretesting prior to a study session has been shown to benefit memory for pretested information compared to traditional study. While previous research has not found a detriment to non-pretested but related material, it is possible that taxing attention by increasing the playback speed of presented material could reveal such impairments. The current study (N = 239) compared multiple-choice learning from educational videos at 1x, 1.5x, and 2x speeds. Three videos (one at each speed) were presented after a pretest, for which half of the tested material was pretested, and half was not (non-pretested related). Another three videos were presented without …


La Deconstrucción De La Idea De Maternidad En Dos Novelas Colombianas: La Perra De Pilar Quintana Y Esta Herida Llena De Peces De Lorena Salazar Masso, Catalina Revelo May 2024

La Deconstrucción De La Idea De Maternidad En Dos Novelas Colombianas: La Perra De Pilar Quintana Y Esta Herida Llena De Peces De Lorena Salazar Masso, Catalina Revelo

Theses and Dissertations

Esta tesis examina la deconstrucción de nociones tradicionales sobre la maternidad en dos novelas colombianas contemporáneas: La perra de Pilar Quintana y Esta herida llena de peces de Lorena Salazar Masso. Mediante un análisis literario feminista, se argumenta que ambas obras ofrecen representaciones transgresoras de la experiencia materna que desafían mandatos culturales normativos. Basándose en marcos teóricos de Simone de Beauvoir, Hélène Cixous y Susan Reisz, entre otros, se explora cómo estas novelas problematizan concepciones esencialistas de la maternidad como destino natural femenino. A través de una lectura atenta, se demuestra cómo estas narrativas dan voz a las sombras y …


Role Of A Precision Biotic And A Protease Fed Alone And In Combination To Dekalb White Laying Hens At Peak Production Phase, Elsianna Rodewald May 2024

Role Of A Precision Biotic And A Protease Fed Alone And In Combination To Dekalb White Laying Hens At Peak Production Phase, Elsianna Rodewald

Theses and Dissertations

A precision biotic (PB) in standard and reduced CP diets, and a protease (PRO) used alone and in combination with PB in the reduced CP diet were evaluated. Effects on performance, digestibility, and blood biomarkers were determined in Dekalb White hens from 24 to 42 weeks of age. Nine diets were fed: 1) a standard diet with a 17.5% formulated CP level (T1); 2) T1 with 500ppm PB (T2); 3) T1 with 700ppm PB (T3); 4) a reduced CP diet with a 15.5% formulated CP level (T4); 5) T4 with 500ppm PB (T5); 6) T4 with 700ppm PB (T6); 7) …


“Freakish Man”: Sexual Blues, Sacred Beliefs, And The Transformation Of Black Queer Identity, 1870-1957., Xavier E. Sivels May 2024

“Freakish Man”: Sexual Blues, Sacred Beliefs, And The Transformation Of Black Queer Identity, 1870-1957., Xavier E. Sivels

Theses and Dissertations

“‘Freakish Man’: sexual blues, sacred beliefs, and the transformation of Black queer identity, 1870-1959” investigates how queer Black men expressed their gender and sexual identities. It follows how, from the days of Reconstruction to the modern civil rights movement, queer Black men used various aspects of Black culture—particularly the blues, working-class social culture, and charismatic religion—to form identities that departed from dominant Black and white norms. The “freakish man” emerged as queer Black men cultivated legible, subversive gender and sexual identities in sacred and secular spaces of working-class Black culture that prioritized masculine heterosexuality. Though queer Black men were briefly …


Evaluating Efficacy Of Modified Barrier Operations To Limit Silver Carp Movements In The Mississippi Alluvial Valley, Joshua Stafford May 2024

Evaluating Efficacy Of Modified Barrier Operations To Limit Silver Carp Movements In The Mississippi Alluvial Valley, Joshua Stafford

Theses and Dissertations

Invasive Silver Carp (Hypophthalmichthys molitrix) have spread throughout the Mississippi River basin and threaten native species. The Lower Mississippi Alluvial Valley has numerous water-control structures. These structures could potentially be operated to limit expansions of invasive fishes. My goal was to examine the effects of two water-control structures on movements of Silver Carp within a floodplain network of waterbodies, including an oxbow lake (Eagle Lake; LA, MS). I monitored Silver Carp movements with an acoustic array and bi-monthly active tracking. No movements occurred through the structure managed to deter carp while nine carp passed through the structure that is not …


Forest Structure And Edge Effects On Bee Functional Diversity In Private, Working Pine Forests, Madalyn Stoecker May 2024

Forest Structure And Edge Effects On Bee Functional Diversity In Private, Working Pine Forests, Madalyn Stoecker

Theses and Dissertations

Private, working forests provide unique opportunities for biodiversity research and management. Even-aged management often creates a heterogeneous mosaic of forest stands in southeastern loblolly pine (Pinus taeda) landscapes, with stands containing structural and compositional characteristics that support different bee functional groups. Interspersion of different structural conditions, combined with roads separating adjacent stands, leads to prevalence of edges across much of the landscape, which may have varying effects on bee species. I evaluated how landscape heterogeneity and presence of edge influences functional diversity in wild bee (Hymenoptera: Apoidea: Anthophila) communities during the summers of 2022 and 2023. Open conditions within early …


Ultrasonographic Evaluation Of Splenic Nodules And Masses With B-Flow Interrogation Correlates To Cytologic Or Histopathologic Characterization As Benign Or Malignant., William Spigener Stevenson May 2024

Ultrasonographic Evaluation Of Splenic Nodules And Masses With B-Flow Interrogation Correlates To Cytologic Or Histopathologic Characterization As Benign Or Malignant., William Spigener Stevenson

Theses and Dissertations

The use of brightness mode (B-mode) ultrasound (US), color Doppler (CD), and power Doppler (PD) can all help evaluate and characterize splenic lesions. A relatively new non-Doppler technology used to evaluate vasculature called B-Flow helps overcome certain limitations of CD and PD that affect visualization of blood flow. There are no studies describing the use of B-Flow characterizing splenic lesions in dogs. A total of 97 splenic lesions were evaluated. Splenic lesions that were larger than 2 cm, distorted the splenic capsule, or accompanied free fluid were significantly associated with malignancy. Lesions with tortuous internal vessels on CD or B-Flow …


Characterization Of The Behavioral Patterns In Salmonella Biofilms Across Different Serovars And Environmental Conditions, Hudson Thames May 2024

Characterization Of The Behavioral Patterns In Salmonella Biofilms Across Different Serovars And Environmental Conditions, Hudson Thames

Theses and Dissertations

Biofilms have the potential to form on various abiotic surfaces and have been found to be more resistant to environmental stressors. Therefore, there is a need to investigate the biofilm forming ability and characteristics of Salmonella strains isolated from poultry meat. These studies characterized the biofilm forming capabilities of 5 Salmonella strains on abiotic surfaces, and investigated changes in gene expression that are associated with Salmonella biofilm formation in 3 Salmonella strains. Salmonella biofilms were cultivated on stainless steel, concrete, rubber, and polyethylene under static and shear stress conditions. Biofilm matrix density was determined using a modified crystal violet assay, …


Southern Pine Beetle Colonization: Dispersal Phenology And Host Selection, John William Thomason May 2024

Southern Pine Beetle Colonization: Dispersal Phenology And Host Selection, John William Thomason

Theses and Dissertations

The southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae), is a prime example of a bark beetle of high ecological and economical importance. As these bark beetles adapt to a changing environment, forest managers must continue to evolve management strategies to improve forest resilience to these pests. Herein, we examined the validity of phenological trap timing cues for the annual spring D. frontalis risk assessment survey and found the traditional use of flowering dogwood (Cornus florida) (Cornaceae) bloom occurred an average of 3 weeks after peak D. frontalis spring flight activity. We also examined the natal host influence on adult …


A Day In The Life Of A Farm-Fluencer: Can Agriculturalists Change Public Perceptions Towards Agriculture By Using Social Media, Josey M. Webb May 2024

A Day In The Life Of A Farm-Fluencer: Can Agriculturalists Change Public Perceptions Towards Agriculture By Using Social Media, Josey M. Webb

Theses and Dissertations

As generations have moved away from the farm, the population has become less aware of the practices behind the agriculture industry. However, people are becoming interested in how their food is produced. Since most of the population has not received an agriculture education, they look towards social media as their source of information. Social media has become a platform for sharing opinions and knowledge on certain topics. It has also been studied the perceptions of others can be influenced by emotionalizing and repeating stories related to the topic. Farmers and ranchers are now sharing their knowledge and experiences regarding agriculture …


Effects Of Moderate Exercise Regimen On Reproductive Development Of Replacement Beef Heifers Reared In Drylots At A High Stocking Density, Logan M. Whipple May 2024

Effects Of Moderate Exercise Regimen On Reproductive Development Of Replacement Beef Heifers Reared In Drylots At A High Stocking Density, Logan M. Whipple

Theses and Dissertations

Raising beef females in drylots is gaining popularity because a more intensive management style facilitates adequate feeding for growth. However, drylots increase stocking density which has previously been shown to be stressful and impair reproductive development, whereas exercise has been shown to alleviate stress. Therefore, the objective was to determine if providing access to an exercise area would improve reproductive development of replacement beef heifers reared in drylots. Body weight, pedometer readings, and blood samples for plasma cortisol were collected weekly. Additional blood samples for genes associated with welfare, hair cortisol samples, and heifer temperament was assessed periodically throughout the …


Performance Evaluation Of Low-Cost Gps Machine Guidance Systems For Livestock Production Forage And Pasture Management Applications, Conner Childress Wright May 2024

Performance Evaluation Of Low-Cost Gps Machine Guidance Systems For Livestock Production Forage And Pasture Management Applications, Conner Childress Wright

Theses and Dissertations

Global Positioning System (GPS) machine guidance aids in the precise navigation and piloting of farm machinery and serves to boost productivity and optimize farm operations. Characterization of low-cost GPS guidance systems for livestock production operations is necessary for return on investment (ROI) decision making. The objective of this research is to characterize the accuracy of four commercially available low-cost ($985 - $4,200) wide area augmentation system (WAAS) corrected GPS guidance systems. Testing procedures were designed in accordance with the ASABE/ISO standard 12188-2 for testing of satellite-based guidance systems during straight line travel. The vehicles lateral deviation of a planned path, …


Fecal Genomics Provides Insights On Connectivity Of Endangered Wildlife In A Human Dominated Landscape, Abhinav Tyagi May 2024

Fecal Genomics Provides Insights On Connectivity Of Endangered Wildlife In A Human Dominated Landscape, Abhinav Tyagi

Theses and Dissertations

Many mammalian species, facing severe historic range reductions, now inhabit fragmented habitats. Habitat fragmentation involves the reduction of habitat into smaller patches, increasing distances between them, and eventually leading to small isolated populations. Species' responses to habitat alteration may vary based on factors such as body size, dispersal ability, and abundance. Understanding these differences is crucial for effective multispecies conservation planning. Genomic data, within a landscape genetic framework, are increasingly applied to evaluate the effects of habitat fragmentation and understand influential landscape features for connectivity. The quantity of data enhances the power and precision of assessing landscape impacts on gene …


Welcome To The Apocalypse, Demetrius E. Wilson May 2024

Welcome To The Apocalypse, Demetrius E. Wilson

Theses and Dissertations

DW’s abstract, vibrant, and bipolar paintings stem from a place of personal biography and collectively shared experience. In this paper, he examines the apocalypse, human nature, tragedy, and the demise of adolescence in our era in the face of increasing technological advances.


Wordflight, Joey Gonnella May 2024

Wordflight, Joey Gonnella

Theses and Dissertations

Exploring subjects revolving around the nature of images, language and their subsequent disseminationn through time, this paper weaves together seemingly unrelated topics from the hot air balloons of the Franco-Prussian war to the envelope poems of Emily Dickinson.


Past And Future Winds, Alicia Ehni May 2024

Past And Future Winds, Alicia Ehni

Theses and Dissertations

Ehni’s thesis reflects on the role of wind to connect and transform. Looking at science and invisible forces like Earth’s magnetic field, her "Oculus" sculptures evoke old tools for orientation & migration. Birds, insects, plants, roads and sand, appear in a video and an experimental 16mm pinhole film of her bike journey along the Hudson River, NY. “Coordinates”, a magnetic drawing installation, addresses impermanence, attraction to land and fragility. Tracing memories of the Paracas desert in Peru, this thesis follows her interest in alchemy, ecology and the cosmos.


Arrival Of Spring, Ryan Johnson May 2024

Arrival Of Spring, Ryan Johnson

Theses and Dissertations

Ryan Johnson’s plein air paintings address a season of personal longing by relying on the empathetic power of observational painting. His current series of oil on linen panels, painted on site, track the transition from winter to spring in and around New York City. In “Arrival of Spring”, he reflects on the decisions made on site, art historical influences, and the hope of anticipation.


Subterranean Daydreams, Jack Perry May 2024

Subterranean Daydreams, Jack Perry

Theses and Dissertations

“Subterranean Daydreams” locates caves, tunnels, passageways, and the subway in particular, as sites of reflection, development and transformation. This paper examines the potential for such sites to aid in imagining the future through the restrained scale of architectural model-size sculpture and short fiction.


Default, Noah Pica May 2024

Default, Noah Pica

Theses and Dissertations

“Default” explores the formation and maintenance of normalcy, uniformity, and banality in American life. Noah Pica starts with the visual language of lined paper, prefabricated objects, model-making kits, and blueprints. He reforms these structures through a sculpture practice, investigating how their design inconspicuously implements social norms.