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231,275 full-text articles. Page 10 of 6154.

Comparing Cognition In Women Between The Ages Of (18-40) And (40-70), Annalyn Smith 2021 University of Arkansas, Fayetteville

Comparing Cognition In Women Between The Ages Of (18-40) And (40-70), Annalyn Smith

Biological Sciences Undergraduate Honors Theses

Currently, 5.8 million Americans are living with Alzheimer’s disease (AD), which is a degenerative brain disease. It is currently the sixth-leading cause of death in the United States (Alzheimer’s Association, 2019). AD also possesses a financial burned on the United States, estimated to cost $290 billion in 2019. Sufferers of AD insidiously lose their memory, personality, and judgment abilities until there are no longer recognizable by their loved ones. Currently, the best chance suffers of AD have is to catch the disease early on to slow its effects. This is due to the fact that treatment can ...


“The Role Of Poultry On Food Insecurity In Mozambique”, Austin Heinisch 2021 University of Arkansas, Fayetteville

“The Role Of Poultry On Food Insecurity In Mozambique”, Austin Heinisch

Finance Undergraduate Honors Theses

Hunger, poverty, and starvation in developing countries are some of the most prevalent challenges facing the world today but many people outside of these areas are not fully aware as to just how bad it is. In the country of Mozambique, where the following research took place, food insecurity levels are rampant, and many different groups/companies are trying to change that. Through a service-learning study abroad program in the summer of 2019, my group and I worked with the local company New Horizons to research ways in which poultry production for both the company and their rural out growers ...


How Acetylation Regulates Metabolic Enzyme Function During Environmental Shifts, Jared Canonigo 2021 University of Arkansas, Fayetteville

How Acetylation Regulates Metabolic Enzyme Function During Environmental Shifts, Jared Canonigo

Biological Sciences Undergraduate Honors Theses

Organisms such as Saccharomyces cerevisiae can regulate the mechanisms of proteins through post-translational modification. These modifications play a vital role in functional proteomic activity because they can regulate protein activity, localization, and interaction with other cellular molecules. Such modifications include phosphorylation, methylation, and acetylation. The metabolic mechanisms of yeast became of keen interest to our lab because our lab noticed many stress defense proteins were being acetylated during stress heat shock. Notably, Adh1p and Adh2p showed both an increase and a decrease in acetylation at two lysine residues (K315 and K314) overtime during heat shock respectively, though the exact function ...


Temperature-Dependent Macrophage Activity In Rainbow Trout, Danica McGrevey 2021 University of Arkansas, Fayetteville

Temperature-Dependent Macrophage Activity In Rainbow Trout, Danica Mcgrevey

Biological Sciences Undergraduate Honors Theses

Fever is an essential component of the immune response. Fever enhances immune responses as well as creates an environment in which the body has advantages over pathogens. Macrophages are often the first cells that come in contact with pathogens, as they reside in tissues. They are important for their engulfment of pathogens that results in the digestion of the pathogen, but they also produce nitric oxide and cytokines that contribute to immune response in a variety of ways, including initiating adaptive immunity and directing the production and activity of other immune cells. We were curious about macrophages from other temperature ...


Understanding Rumen Microbial Community Structure And Function Towards Decreasing Methane Emissions, Allison L. Knoell 2021 University of Nebraska-Lincoln

Understanding Rumen Microbial Community Structure And Function Towards Decreasing Methane Emissions, Allison L. Knoell

Theses and Dissertations in Animal Science

Resource use is continually being limited due to this growth, therefore, production of high-quality animal protein sources, such as meat and milk, are challenged. The rumen microbiome is extensive and serves to provide several metabolic requirements for the animal for growth. Recently, a significant amount of research is being driven towards understanding the rumen microbiome due to its large effect on metabolic requirements.

A study was conducted to replace alfalfa with nonforage fiber sources in dairy cows. It was determined milk yield and intake are maintained when nonforage fibers replace forage sources, while decreasing methane levels. Water consumption decreased when ...


Gut Community Response To Wheat Bran And Pinto Bean, ShuEn Leow 2021 University of Nebraska-Lincoln

Gut Community Response To Wheat Bran And Pinto Bean, Shuen Leow

Dissertations, Theses, & Student Research in Food Science and Technology

There is general consensus among the scientific community that dietary fibers reduce the risk of Western diseases through their fermentation by beneficial microbial communities in the human gut. However, dietary fibers in wheat bran (WB) and pinto bean (PB) are incompletely fermented by the gut microbiota. Therefore, there is a critical need to identify gut microbial communities that can increase fermentation of dietary fibers from these foods to maximize their disease-preventing properties. The goal of this study was to identify such communities with increased capacity to ferment the dietary fibers in WB and PB. To accomplish these goals, a stepwise ...


Investigating The Role Of Spiders In Integrated Pest Management For Biological Control Of Nebraska Crop Pests, Samantha Daniel 2021 University of Nebraska-Lincoln

Investigating The Role Of Spiders In Integrated Pest Management For Biological Control Of Nebraska Crop Pests, Samantha Daniel

Dissertations and Student Research in Entomology

As generalist predators, spiders are capable of fulfilling a wide variety of ecological niches allowing them to intercept and prey upon an array of insect species. This characteristic could be particularly advantageous within agricultural ecosystems. This project sought to reveal the composition and abundance of spider communities within cornfields in western Nebraska and the impact of agronomic practices on those communities as well as determine the potential for spider predation upon two key pests of corn. Spiders were collected from eight corn fields from May to August 2017 and four corn fields from May to August 2018. Additionally, the populations ...


Studies Of The Dutpase Of The Western Corn Rootworm, Carlos Riera-Ruiz 2021 University of Nebraska-Lincoln

Studies Of The Dutpase Of The Western Corn Rootworm, Carlos Riera-Ruiz

Dissertations and Theses in Biological Sciences

The western corn rootworm (WCR), Diabrotica virgifera virgifera, is a major corn pest in the United States and Europe. WCR has developed resistance to multiple management strategies, including Cry proteins. Even though the biology and ecology have been thoroughly studied in WCR, their genome and molecular mechanisms are understudied. This work focuses on the ubiquitous enzyme deoxyuridine triphosphatase (dUTPase) encoded by the DUT gene. dUTPase hydrolyzes dUTP into dUMP and pyrophosphate. It contributes to genome stability by keeping the uracil-to-thymine ratio at a certain level. In WCR, two dUTPase isoforms were predicted using transcriptome analyses. These two potential isoforms shared ...


How To Feed Brazil, Anna Katherine Brawner 2021 University of Tennessee, Knoxville

How To Feed Brazil, Anna Katherine Brawner

Chancellor’s Honors Program Projects

No abstract provided.


Painting With Pathogens, Emily List 2021 University of Tennessee, Knoxville

Painting With Pathogens, Emily List

Chancellor’s Honors Program Projects

No abstract provided.


Psychedelics Can Save: The Scientific And Social Case For Rescheduling Psychedelic Compounds, Galen M. Fader 2021 University of Tennessee, Knoxville

Psychedelics Can Save: The Scientific And Social Case For Rescheduling Psychedelic Compounds, Galen M. Fader

Chancellor’s Honors Program Projects

No abstract provided.


Competitive Interactions Among Co-Infecting Symbionts In A Model Animal-Associated Microbiome, Justin L. Pritchett 2021 University of Tennessee, Knoxville

Competitive Interactions Among Co-Infecting Symbionts In A Model Animal-Associated Microbiome, Justin L. Pritchett

Chancellor’s Honors Program Projects

No abstract provided.


Dna Damage And Aging In Progeria Compared To Healthy Cells., Ashtyn Marie Hill 2021 University of Tennessee, Knoxville

Dna Damage And Aging In Progeria Compared To Healthy Cells., Ashtyn Marie Hill

Chancellor’s Honors Program Projects

No abstract provided.


Effect Of A Near-Zero Magnetic Field On Development And Flight Of Oriental Armyworm (Mythimna Separata), Meng-meng Yan, Lei Zhang, Yun-xia Cheng, Thomas W. Sappington, Wei-dong Pan, Xing-fu Jiang 2021 Chinese Academy of Agricultural Sciences

Effect Of A Near-Zero Magnetic Field On Development And Flight Of Oriental Armyworm (Mythimna Separata), Meng-Meng Yan, Lei Zhang, Yun-Xia Cheng, Thomas W. Sappington, Wei-Dong Pan, Xing-Fu Jiang

Entomology Publications

The geomagnetic field affects all living organisms on the Earth. In this study we investigated the developmental and behavioral effects of rearing Mythimna separata in a near-zero magnetic field (<500 nT) compared to the local geomagnetic field (approximately 50 µT). The near-zero magnetic field produced by a Helmholtz coil system significantly lengthened larval and pupal development durations, increased male longevity, and reduced pupal weight, female reproduction, and the relative expression level of the vitellogenin (Vg) gene in newly emerged females. Moreover, the near-zero magnetic field had a considerable negative effect on the mating ratio of M. separata adults. In addition, the moths in the near-zero magnetic field displayed less flight activity late in the night than those in the Earth's normal geomagnetic field, indicating that the flight rhythm of M. separata may be affected by the near-zero magnetic field. Reduction in magnetic field intensity may have negative effects on the development and flight of oriental armyworm, with consequent additional effects on its migration.


Identifying Essential Fisheries Competencies To Link To School Curriculum: Supporting Nez Perce Students’ Stem Identity, Raymond A. Dixon, Karla Eitel, Teresa Cohn, Marcie Carter, Kay Seven 2021 University of Idaho

Identifying Essential Fisheries Competencies To Link To School Curriculum: Supporting Nez Perce Students’ Stem Identity, Raymond A. Dixon, Karla Eitel, Teresa Cohn, Marcie Carter, Kay Seven

Journal of Research in Technical Careers

This study examined the process to identify required competencies for an entry-level position in the Nez Perce Tribe Department of Fisheries Resource Management located in the Pacific Northwest. The overall goal was to provide content for a pedagogical framework to support Nez Perce students in the development of their STEM identity and to consider careers in natural resources and fisheries. The DACUM process was used to analyze the job, Fisheries Technician. The process involved a focus group of six expert workers in the Department of Fisheries Resource Management and was led by a facilitator. The experts identified 48 competencies categorized ...


Exploring How Maternal Phosphorus Status Affects Calf Growth And Performance, Elizabeth Lafferty 2021 University of Arkansas, Fayetteville

Exploring How Maternal Phosphorus Status Affects Calf Growth And Performance, Elizabeth Lafferty

Animal Science Undergraduate Honors Theses

This study will focus on how maternal phosphorus status of beef heifers affects the growth and performance of their calves. Heifers have been offered free-choice mineral with either 0 or 4% supplemental phosphorus from 30 days after weaning until calving. A study by H. Hilfiker, a University of Arkansas honors student, investigated the effects of these treatments from 30 days after weaning until 60 days after the breeding season when heifers were confirmed to be bred or open. For this developing heifer project 64 crossbred Angus heifers were assigned randomly into 8 groups (8 heifers/ group) before assigning each group ...


Shelter Dogs Need A Home: The Effect Of Enrichment And Human Contact On The Welfare And Adoptability Of Shelter Dogs, Hannah G. Clark 2021 Grand Valley State University

Shelter Dogs Need A Home: The Effect Of Enrichment And Human Contact On The Welfare And Adoptability Of Shelter Dogs, Hannah G. Clark

Honors Projects

It comes as no surprise that an animal shelter can be a stressful place for dogs. Shelter conditions, accompanied by multiple, novel stimuli, produce a stressful environment that cause hormonal and behavioral responses in dogs housed in shelters. Many of the stereotypical behaviors produced by the stress of living in a shelter, which tend to worsen as length of stay increases, are undesirable to potential adopters. However, many studies have shown that enrichment with a variety of toys, exercise, and human interaction can buffer the stress response in shelter dogs and improve their well-being. Implementing obedience training and temporary fostering ...


A Metabolomics-Based Approach To The Screening Of Endometrial Cancer: Development Of A Gas Chromatography-Ion Trap Mass Spectrometry-Based Method, Allycia Lee 2021 University of Tennessee at Chattanooga

A Metabolomics-Based Approach To The Screening Of Endometrial Cancer: Development Of A Gas Chromatography-Ion Trap Mass Spectrometry-Based Method, Allycia Lee

Honors Theses

Endometrial Cancer (EC) is the most common malignant tumor of the female reproductive tract. Currently there are no methods for effectively screening EC, but one method that is thought to be useful in screening EC is metabolomics. Metabolomics involves the analysis of metabolites which are low molecular weight inorganic and organic chemicals that are substrates, intermediates, and by-products of enzyme-mediated biochemical reactions in the cell. Previous research shows that the metabolic signature of EC patients are discernable from those of healthy patients. To aid in the development of an effective screening method for EC, blood serum, urine, and saliva samples ...


Troglofauna Of Van Buren And White County: A Survey Of Four Caves In The Mideastern Cumberland Plateau, Gavin Page 2021 University of Tennessee at Chattanooga

Troglofauna Of Van Buren And White County: A Survey Of Four Caves In The Mideastern Cumberland Plateau, Gavin Page

Honors Theses

The Cumberland Plateau in Tennessee has the highest cave-obligate biodiversity in North America. Cave-obligate species are entirely restricted to subterranean habitat and demonstrate unique troglomorphy. These species are categorized as troglobionts. However, because of their isolated occurrences, theses species are vulnerable to a variety of disturbances. This issue is furthered in the fact that only approximately 7% of the caves in this region have been surveyed. Of these caves that have been surveyed, only a small portion were professional entomological surveys, while almost no cave has ever been extensively repeat sampled. This study involved newly sampling one cave and repeat ...


Increasing Stress Tolerance In Saccharomyces Cerevisiae Using Lipocalin Genes, Ximena Leon 2021 University of Tennessee at Chattanooga

Increasing Stress Tolerance In Saccharomyces Cerevisiae Using Lipocalin Genes, Ximena Leon

Honors Theses

Saccharomyces cerevisiae is a microorganism that is commonly used in industries, but its productivity is significantly hindered by its inability to resist high stress levels found in industrial processes. By increasing stress tolerance in S. cerevisiae, its role in industrial processes could be maximized. The objective of this study is to determine if complementation of lipocalin genes into the wildtype and knockout strains of S. cerevisiae can increase stress tolerance against a variety of stressors. We identified the knockout yeast strains, ALD3, ALD4, PDX3, and ILV1, as being sensitive to various stressors including salinity, heat, oxidative, and osmotic stresses. Arabidopsis ...


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