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Articles 1501 - 1530 of 10253
Full-Text Articles in Entire DC Network
Association Between Toxoplasma Gondii Seropositivity And Serointensity And Brain Volume In Adults: A Cross-Sectional Study, Bruce L. Brown, Lance D. Erickson, Shawn D. Gale, Dawson W. Hedges
Association Between Toxoplasma Gondii Seropositivity And Serointensity And Brain Volume In Adults: A Cross-Sectional Study, Bruce L. Brown, Lance D. Erickson, Shawn D. Gale, Dawson W. Hedges
Faculty Publications
The intracellular protozoal parasite Toxoplasma gondii has been associated with worsened cognitive function in animal models and in humans. Despite these associations, the mechanisms by which Toxoplasma gondii might affect cognitive function remain unknown, although Toxoplasma gondii does produce physiologically active intraneuronal cysts and appears to affect dopamine synthesis. Using data from the UK Biobank, we sought to determine whether Toxoplasma gondii is associated with decreased prefrontal, hippocampal, and thalamic gray-matter volumes and with decreased total gray-matter and total white-matter volumes in an adult community-based sample. The results from adjusted multivariable regression modelling showed no associations between Toxoplasma gondii and …
Balaam In The Book Of Numbers, Dana M. Pike
Balaam In The Book Of Numbers, Dana M. Pike
Faculty Publications
Balaam, the non-Israelite who prophesied positively about the Israelites, remains an enigmatic biblical figure, at least in part, because we cannot fully or confidently answer several important questions about him. The account of Balaam in Numbers 22–24 is oddly unique and reads like an independent unit, but it connects in several ways with the content and themes of the rest of the book of Numbers. So, however this account developed and was incorporated into the book of Numbers, it can at least be appreciated as part of the organic whole of the book.
User Guide For Dust Modeling Using Cmaq 5.3.1 And Wrf 4.2.1, Zachary D. Lawless, Ariel S. Cable, Cameron B. Van Dyke, Bradley R. Adams
User Guide For Dust Modeling Using Cmaq 5.3.1 And Wrf 4.2.1, Zachary D. Lawless, Ariel S. Cable, Cameron B. Van Dyke, Bradley R. Adams
Faculty Publications
Researchers at Brigham Young University (BYU) have developed a software framework for modeling dust emission and transport using the Community Multiscale Air Quality (CMAQ) modeling system in conjunction with the Weather Research and Forecasting (WRF) model and other utility programs. This framework uses meteorological data, land use data, and soil properties to predict dust concentrations for a specified area. This User Guide describes the start-to-finish process required to install and utilize relevant software to calculate and visualize dust concentrations. Note that the examples and figures provided in the guide are specific to Utah in the western United States, where this …
Native Fish Loss In A Transition-Zone Stream Following Century-Long Habitat Alterations And Nonnative Species Introductions, Matthew R. Haworth, Kevin R. Bestgen, Edward R. Kluender, William H. Keeley, Donald R. D'Amico, F. Boyd Wright
Native Fish Loss In A Transition-Zone Stream Following Century-Long Habitat Alterations And Nonnative Species Introductions, Matthew R. Haworth, Kevin R. Bestgen, Edward R. Kluender, William H. Keeley, Donald R. D'Amico, F. Boyd Wright
Western North American Naturalist
Habitat destruction, hydrologic alteration, and nonnative species introductions have greatly altered the composition of North American stream fish assemblages. In the western United States, intermediate-elevation transition-zone stream reaches––those located between higher-elevation mountain and lower-elevation plains areas––historically supported native fish assemblages that included sensitive species and peripheral or isolated populations of more widespread taxa. We compiled historical records and conducted sampling to examine changes to the fish assemblage in the transition-zone reach of South Boulder Creek, Colorado, USA. Because human development of transition zones altered stream and riparian ecosystems prior to sampling, we developed a historical timeline of human activities to …
Harvester Ants Reduce Seed Survivorship In Slickspot Peppergrass, A Rare Mustard Endemic To Idaho, Jennifer A. Brown, Ian C. Robertson
Harvester Ants Reduce Seed Survivorship In Slickspot Peppergrass, A Rare Mustard Endemic To Idaho, Jennifer A. Brown, Ian C. Robertson
Western North American Naturalist
Seed predation can significantly reduce the reproductive success of individual plants and their populations. The consequences of seed predation often are most pronounced for rare plant species, in which loss of seeds can have a disproportionate effect on populations. The present study examined the effects of seed predation by Owyhee harvester ants (Pogonomyrmex salinus) on seed survivorship in slickspot peppergrass (Lepidium papilliferum), a rare mustard endemic to sagebrush-steppe habitat in southwestern Idaho. Within sagebrush-steppe, L. papilliferum is restricted to microsites known as “slick spots”—shallow depressions of soil characterized by distinct clay layers and surface water retention …
Breeding System And Pollination Of Thermopsis Divaricarpa (Fabaceae: Papilionoideae) In The Southern Rocky Mountains, Roxaneh S. Khorsand, Olufisayo Awolaja
Breeding System And Pollination Of Thermopsis Divaricarpa (Fabaceae: Papilionoideae) In The Southern Rocky Mountains, Roxaneh S. Khorsand, Olufisayo Awolaja
Western North American Naturalist
Thermopsis divaricarpa (Fabaceae) is a common wildflower in the montane zone of the Colorado Rocky Mountains, but its reproductive ecology is still largely unknown. Montane meadows are recognized for their relatively high species richness and important ecosystem services. Thus, knowledge of the reproductive ecology of T. divaricarpa is useful when assessing community-level responses to climate change in the montane zone of the Rockies. We investigated the phenology, breeding system, and pollination of this species in the southern Rocky Mountains of Colorado. Our results suggest that T. divaricarpa flowers from early June to mid-July, exhibits a facultative xenogamous breeding system, and …
Scavenging Of Animal Carcasses By Gumaga Nigricula (Sericostomatidae, Trichoptera), An Apparent Herbivore, Stephanie M. Carlson, Pablo Rodriguez-Lozano, Hana Moidu, Robert A. Leidy
Scavenging Of Animal Carcasses By Gumaga Nigricula (Sericostomatidae, Trichoptera), An Apparent Herbivore, Stephanie M. Carlson, Pablo Rodriguez-Lozano, Hana Moidu, Robert A. Leidy
Western North American Naturalist
Caddisflies within the genus Gumaga are generally considered shredders (i.e., consumers of leaf litter) or grazers (i.e., consumers of algae). We report on observations of Gumaga nigricula scavenging animal carcasses within and adjacent to isolated pools along intermittent reaches of Coyote Creek, Santa Clara County, California, USA. In particular, during the summer of 2018, we observed G. nigricula scavenging fish carcasses within isolated pools as well as bits of flesh from the bones of a black-tailed deer (Odocoileus hemionus columbianus) deposited on the stream bank. To the best of our knowledge, our observations represent the first published record …
Biological Pretreatment Of Biomass For Enhanced Biogas Production, Skylar F. Van Horne
Biological Pretreatment Of Biomass For Enhanced Biogas Production, Skylar F. Van Horne
Undergraduate Honors Theses
The biogas output efficiency of controlled anaerobic digestion (AD) can be enhanced by several different pretreatment methods to produce renewable energy. According to the literature, there are pros and cons to each pretreatment method. Biological pretreatment provides environmentally safe and renewable means for enhancing biodegradability and net energy output. Current research has yet to reliably demonstrate the ability of bacterial strains, such as Caldicellulosiruptor bescii (C. bescii), to digest common waste substrates in efficient ways. Novel methods in key intermediate molecular quantification and alkalinity tracking are used here to explore C. bescii’s ability to digest lignocellulosic material in …
A Noninvasive Genetic Technique Using Guano For Identification Of Corynorhinus Townsendii (Townsend’S Big-Eared Bat) Maternity Roosts, Kelly E. Williams, Richard E. Sherwin, Kaci K. Vandalen, Antoinette J. Piaggio
A Noninvasive Genetic Technique Using Guano For Identification Of Corynorhinus Townsendii (Townsend’S Big-Eared Bat) Maternity Roosts, Kelly E. Williams, Richard E. Sherwin, Kaci K. Vandalen, Antoinette J. Piaggio
Western North American Naturalist
The use of DNA from fecal samples can allow for a better understanding of the ecology of a species without capturing and handling the animals. This is particularly useful for cryptic and elusive animals, such as bats. Being able to identify critical habitat, such as maternity roosts, for bat species in areas where they depend on abandoned mines that could be slated for closure is necessary to enact appropriate protections for such roosts. In particular, Corynorhinus townsendii commonly uses abandoned mines for maternity roosts. Further, maternity roosts are difficult to identify through visual surveys when only one or a few …
Experience Design In An Informal Learning Environment: The Redesign Of A Library Exhibit, Samuel Furner
Experience Design In An Informal Learning Environment: The Redesign Of A Library Exhibit, Samuel Furner
Instructional Psychology and Technology Graduate Student Projects
The Harold B. Lee Library is a space where students can collaborate and discover. One room in the library houses artifacts from the personal collection of Lloyd Alexander, an author known for his fantasy literature. The goal of this project was to transform the room into a meaningful experience. Over the course of the project, the design team drew from narrative theory and engaged in iterative design and evaluation to create the final exhibit. This new exhibit guided visitors to learn from Lloyd’s words, hold his books, and reflect on what inspires them.
Identification Of Genes That Determine Fitness, Virulence, And Disease Outcomes In Mastitis Associated Eschericia Coli, Michael Andrew Olson
Identification Of Genes That Determine Fitness, Virulence, And Disease Outcomes In Mastitis Associated Eschericia Coli, Michael Andrew Olson
Theses and Dissertations
Escherichia coli is an incredibly diverse group of bacteria that consist of both commensal and pathogenic strains that cause disease in a wide variety of tissues in many different animals. The current dogma, based on years of extensive molecular and genetic studies, is that individual strains have adapted to specific environments through acquisition of specific genes or come from lineages that are particularly suited to a unique tissue or host. However, mastitis-associated E. coli (MAEC) have thus far resisted such descriptions. The fitness and virulence factors of MAEC are poorly understood and molecular tools are rarely applied. This dissertation reports …
Exploring Dialogue Journals As A Context For Connecting With And Supporting The Emotional Lives Of Fourth Graders, Samantha Simone Johnson
Exploring Dialogue Journals As A Context For Connecting With And Supporting The Emotional Lives Of Fourth Graders, Samantha Simone Johnson
Theses and Dissertations
About 20 percent of school-aged children, 18 years and younger, struggle with mental health issues in America today. Mental health issues lead to greater rates of suicide, depression, loneliness, anxiety, and bullying that takes place in and out of schools. This exploratory multiple case study looks at how 10 fourth graders, five male and five female, use a weekly entry in a dialogue journal letter to their teacher to share their emotional lives. I explore how a dialogue journal can open up a space between students and teachers for emotional aspects of life and learning to be included in schools. …
Late Quaternary Voles From Persistence Cave, Black Hills, South Dakota, Christopher N. Jass, Jim I. Mead, Sandra L. Swift
Late Quaternary Voles From Persistence Cave, Black Hills, South Dakota, Christopher N. Jass, Jim I. Mead, Sandra L. Swift
Western North American Naturalist
Excavations at Persistence Cave (Black Hills, SD), produced a large sample of Quaternary microfauna including a diverse assemblage of arvicoline rodents. Identifiable lower first molars (n = 367) include specimens referred to heather vole (Phenacomys sp.), muskrat (Ondatra sp.), southern bog lemming (Synaptomys cooperi), red-backed vole (Myodes sp.), sagebrush vole (Lemmiscus curtatus), prairie vole (Microtus ochrogaster), and a form of meadow vole (Microtus sp.). Direct radiocarbon dating of specimens of Lemmiscus curtatus is consistent with previous records from the Nelson–Wittenberg Site and indicates that sagebrush voles inhabited …
Ghostlore In Oregon: A Field Guide, Abbi Wilbur, Brakita Kuhns
Ghostlore In Oregon: A Field Guide, Abbi Wilbur, Brakita Kuhns
Final Projects
A collection of legends, PENs, and memorates surrounding reportedly haunted locations in Oregon. Written in the style of a field guide.
Lds Missionary Poop Stories, Amanda Ius
Lds Missionary Poop Stories, Amanda Ius
Final Projects
A collection of LDS missionary poop stories collected from returned LDS missionaries.
Edible Tradition: Food, Folklore, And The Latter-Day Saint Missionary, Noelle Marley
Edible Tradition: Food, Folklore, And The Latter-Day Saint Missionary, Noelle Marley
Final Projects
Stories about LDS missionaries encountering foreign food traditions and customs.
Dad Jokes, Kaylee Cox
Dad Jokes, Kaylee Cox
Final Projects
A collection of Dad Jokes. The paper explores the elements of a dad joke and why it persists as a prominent tradition about fathers.
Memes: The Digital Folklore Joke, Joseph Avila
Memes: The Digital Folklore Joke, Joseph Avila
Final Projects
A study and analysis on memes as digital folklore.
The Sanderson Wampus Cat, Sarah Buckner
The Sanderson Wampus Cat, Sarah Buckner
Final Projects
Collection of Sanderson Wampus Cat stories and illustrations.
Korean Folklore In My Family, Michelle Chambers
Korean Folklore In My Family, Michelle Chambers
Final Projects
Korean family stories, customs, and beliefs. This paper focus on how such folklore reflects on Korea and its people.
Vance, Benjamin-391 Final Project (That's Christmas To Me), Benjamin Vance
Vance, Benjamin-391 Final Project (That's Christmas To Me), Benjamin Vance
Final Projects
My collection of family Christmas traditions.
Folklore And Role-Playing Games, Reed Gardner
Folklore And Role-Playing Games, Reed Gardner
Final Projects
Favorite memories of role-playing games. This paper looks at role-playing games as folklore and what it means to people.
Droodles, Emmett Rock
Missionary Folklore: Legends And Initiations, Liberty Reid
Missionary Folklore: Legends And Initiations, Liberty Reid
Final Projects
Stories about missionary experiences, specifically focusing on legends and initiations. A total of fifteen (15) stories from twelve (12) different individuals. These stories come from missionaries who have served worldwide.
Stories Of A Man In Mexico, Amy Ottinger, Edgardo Vasquez
Stories Of A Man In Mexico, Amy Ottinger, Edgardo Vasquez
Final Projects
Stories about a man who grew up in hard times in Mexico and the lessons he learned. It includes a police officer's experiences during the ""Mexican Dirty War.""
Cinderella Dressed In Yella, Acacia Ricks
Cinderella Dressed In Yella, Acacia Ricks
Final Projects
A collection and the analysis of children's recess rhymes.
The Karen Gold Book Legend, Adrienne Powell
The Karen Gold Book Legend, Adrienne Powell
Final Projects
This paper highlights the relationships between The Book of Mormon and a Karen legend describing a golden book.
Antimicrobial Peptide Development: From Massively Parallel Peptide Sequencing To Bioinformatic Motif Identification, Alexander K. Erikson
Antimicrobial Peptide Development: From Massively Parallel Peptide Sequencing To Bioinformatic Motif Identification, Alexander K. Erikson
Theses and Dissertations
The isolation, purification, and clinical deployment of antibiotics is one of the major drivers of decrease in morbidity and mortality from infectious bacteria in the 20th century. The rapid, ubiquitous deployment of antibiotics encouraged swift development and distribution of antibiotic resistance. New, novel techniques, technologies, and ultimately therapeutic antimicrobial compounds will be required to counter the rise of antibiotic resistant microbes. Historically, mimicking naturally occurring compounds has been the most fruitful method for discovering new antibiotics; unsurprisingly, many recent efforts have focused on expanding the cultivation and detection of previously unknown microbes and compounds, respectively. Other techniques explore developing compounds …
A Rapid Spectrophotometric Assay For Quantifying Seed Coat Saponins In Quinoa, Sydney Diver Szabo
A Rapid Spectrophotometric Assay For Quantifying Seed Coat Saponins In Quinoa, Sydney Diver Szabo
Theses and Dissertations
Background and objectives: The commonly used afrosimetric foam-height method for quantifying saponins in quinoa is rapid but imprecise. A rapid UV/Vis method, utilizing the Liebermann-Burchard (LB) color reaction, was compared to the foam method across a range of saponin levels in washed and unwashed seed. Findings: A 6 min UV/Vis method provided greater precision and accuracy than the afrosimetric method at the lower saponin levels found in washed quinoa. The afrosimetric method did not differentiate saponin levels below 0.6 mg/mL but allows for useful relative comparisons of saponin content in unwashed quinoa where the foam height is large. Conclusions: The …