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Articles 991 - 1020 of 7186
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Arkansas Razorback Men's Golf Record Book, 2023-2024, University Of Arkansas, Fayetteville. Athletics Media Relations
Arkansas Razorback Men's Golf Record Book, 2023-2024, University Of Arkansas, Fayetteville. Athletics Media Relations
Arkansas Men's Golf
No abstract provided.
Annual Report, 2023-2024, University Of Arkansas, Fayetteville. College Of Engineering
Annual Report, 2023-2024, University Of Arkansas, Fayetteville. College Of Engineering
College of Engineering Annual Report
No abstract provided.
Faculty Highlights, Inquiry Editors
Faculty Highlights, Inquiry Editors
Inquiry: The University of Arkansas Undergraduate Research Journal
No abstract provided.
Exploring The Metabolic And Mitogenic Potential Of A Hyper-Stable Variant Of Fgf1, Emma Starr, Oshadi Edirisinghe, Thallapuranam Krishnaswamy Suresh Kumar
Exploring The Metabolic And Mitogenic Potential Of A Hyper-Stable Variant Of Fgf1, Emma Starr, Oshadi Edirisinghe, Thallapuranam Krishnaswamy Suresh Kumar
Inquiry: The University of Arkansas Undergraduate Research Journal
Fibroblast growth factors (FGFs) are a family of 22 human cytokines involved in critical cellular processes, such as proliferation, differentiation, metabolism, angiogenesis, tumor metastasis, and wound healing. Among these, fibroblast growth factor 1 (FGF1) possesses a powerful mitogenic potential as it can nonspecifically bind to all four FGF receptors. However, the therapeutic applications of FGF1 are hindered by its inherent thermal and proteolytic instability, especially at physiological temperatures. This is believed to be attributed to the heparin-binding pocket at the C-terminus, which contains numerous positively charged residues that repel each other. To combat this instability, FGF1 binds to a negatively …
Business Meeting Report (Secretary's And Treasurer's Report), Academy Editors
Business Meeting Report (Secretary's And Treasurer's Report), Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Probable Extirpation Of The Jackrabbit (Lepus Californicus) From Arkansas, D.B. Sasse
Probable Extirpation Of The Jackrabbit (Lepus Californicus) From Arkansas, D.B. Sasse
Journal of the Arkansas Academy of Science
The black-tailed jackrabbit (Lepus californicus) was first documented in Arkansas during the modern era in Franklin County in 1927. Over the next few decades records were reported from multiple counties in northwest Arkansas and the species was locally common in Benton, Crawford, and Washington counties in the 1950s. The last Arkansas record documented in the scientific literature was from 1968 and since then there have only been three credible reports, with the last being from the late 1980s. The Arkansas Game and Fish Commission solicited reports of jackrabbits from the public and failed to find evidence of them from a …
A Review Of Herpetofaunal Distributions In Arkansas With Special Emphasis On Contributions From Citizen Science: Part I – Snakes, R. Jacobs, N. Ortiz, J. Jackson, J.D. Willson, K.G. Roberts, R. Kannan
A Review Of Herpetofaunal Distributions In Arkansas With Special Emphasis On Contributions From Citizen Science: Part I – Snakes, R. Jacobs, N. Ortiz, J. Jackson, J.D. Willson, K.G. Roberts, R. Kannan
Journal of the Arkansas Academy of Science
We present a comprehensive updated review of the distributions of the 38 species of snakes in Arkansas. We compare historical and current distributions with citizen science data uploaded and verified in iNaturalist, a leading biodiversity monitoring online citizen science database. The Arkansas Herpetological Atlas, a website maintaining species occurrence records, is also used and compared. We highlight the role played by iNaturalist in enhancing our knowledge of snake distributions in Arkansas. 10,885 verified and vetted Research Grade (RG) observations of Arkansas snakes have been recorded in iNaturalist, expanding the known distributions of 36 of the 38 species. This is the …
Ultrastructure Of The Biflagellated Spermatozoon In The Western Siren, Siren Nettingi (Caudata: Sirenidae), Using Scanning Electron Microscopy, S.E. Trauth
Journal of the Arkansas Academy of Science
I investigated the ultrastructure of the biflagellated spermatozoon of the Western Siren, Siren nettingi, using scanning electron microscopy from salamanders collected in northeastern Arkansas. My primary goal in this study was to reveal the general morphology of the distinctive sperm cell components (two axonemes, two undulating membranes, and two axial fibers), which run nearly the entire length of the spermatozoon. These remarkable gamete structures are found in members of the salamander family Sirenidae and do not conform to spermatozoal ultrastructure of any other salamander species. Moreover, the biflagellated sperm are the end product of an extraordinary assemblage of complex maturation …
Journal Of The Arkansas Academy Of Science Volume 78, Academy Editors
Journal Of The Arkansas Academy Of Science Volume 78, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
History And Distribution Of The Wood Stork (Mycteria Americana) In Arkansas, R. Tumlison, L. Serviss
History And Distribution Of The Wood Stork (Mycteria Americana) In Arkansas, R. Tumlison, L. Serviss
Journal of the Arkansas Academy of Science
Wood Storks (Mycteria americana) were thought to be common visitors to Arkansas in the early 1900s, but observations declined mid-century. Surveys of citizen science data and other online sources indicate that numbers of unique observations and total counts of birds have increased since 2000. Storks do not breed here, but have been reported in 34 of 75 counties, and appear mostly in August and September. Birds apparently originate from Mexico. Number of observations have increased since 2016, but many of those observations include only a few birds rather than larger flocks.
Geographical Variation In Songs Of Bachman’S Sparrow (Peucaea Aestivalis), L. Nguyen, K. Doñas, J. Jackson, R. Kannan
Geographical Variation In Songs Of Bachman’S Sparrow (Peucaea Aestivalis), L. Nguyen, K. Doñas, J. Jackson, R. Kannan
Journal of the Arkansas Academy of Science
We present an analysis of geographic variation in primary song components of the Near Threatened North American endemic, Bachman’s Sparrow (Peucaea aestivalis). These songs have 2 distinct portions: an introductory tweet we call the "whistle" and a more complex second portion that we call the "trill". We analyzed 327 songs from 111 recordings downloaded from eBird.org from the entire current range of the species. We grouped the recordings into 3 distinct geographic clusters, East, Central, and West. The data measured from spectrograms suggest a significant statistical difference among groups for 3 measured characteristics: frequency range of trill, number of horizontal …
An Annotated Checklist Of The Camel Crickets (Insecta: Orthoptera: Rhaphidophoridae) Of Arkansas, H.W. Robison, C.T. Mcallister
An Annotated Checklist Of The Camel Crickets (Insecta: Orthoptera: Rhaphidophoridae) Of Arkansas, H.W. Robison, C.T. Mcallister
Journal of the Arkansas Academy of Science
A total of 14 native species of camel crickets and one introduced taxon representing three genera (Ceuthophilus, Phrixocnemis, and Diestrammena) of the orthopteran family Rhaphidophoridae, are herein reported from Arkansas. The most diverse genus was Ceuthophilus, with 13 native species, while Phrixocnemis had one native species, and Diestrammena, formerly Tachycines, was represented by one introduced species. This updated checklist is intended to be of use to entomologists, naturalists, professional biologists, and resource managers in evaluating the biodiversity of Arkansas. State distributional maps are provided for each species listed by county, and habitats are discussed in which each species was taken …
Fish Leeches Of Arkansas, D.J. Richardson, W.E. Moser, C.T. Mcallister, S.P. Lawson, H.W. Robison
Fish Leeches Of Arkansas, D.J. Richardson, W.E. Moser, C.T. Mcallister, S.P. Lawson, H.W. Robison
Journal of the Arkansas Academy of Science
Recent collection within Arkansas greatly enlarges the knowledge concerning hosts and distributions of fish leeches within the state. The natural history of the 6 species of fish leeches known from Arkansas (Placobdella montifera, Placobdella pediculata, Cystobranchus klemmi, Cystobranchus verrilli, Myzobdella lugubris, and Myzobdella reducta) is reviewed and updated and molecular data are provided.
Thematic Mapping Of Apidae Holdings Within The University Of Arkansas Arthropod Museum, Baylie L. Day, Ashley P.G. Dowling, Austin Jones
Thematic Mapping Of Apidae Holdings Within The University Of Arkansas Arthropod Museum, Baylie L. Day, Ashley P.G. Dowling, Austin Jones
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Museum biological collections store species data that can be utilized in research on biodiversity, environmental change, invasive species, public health, and disease. The University of Arkansas Arthropod Museum, which began in 1905, houses over 750,000 specimens and has not yet been digitized. Making data publicly accessible via the internet makes the data available to the entire scientific community. The goal of this project was to create a digital resource to allow greater access to the University of Arkansas Arthropod Museum holdings. To do so, data from Bombus (bumble bee) and Xylocopa (carpenter bee) specimens were entered into a database in …
Stream Restoration Effectiveness In Mullins Creek In Fayetteville, Arkansas, Amadeo Scott, Shannon Speir
Stream Restoration Effectiveness In Mullins Creek In Fayetteville, Arkansas, Amadeo Scott, Shannon Speir
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Lotic waterways are vital for habitat, food, water, and flood protection, but urbanization poses a major threat to their integrity. Runoff from urban surfaces leads to pollution, flashiness, loss of biodiversity, and other symptoms, also known as Urban Stream Syndrome (USS). Streams can be restored in order to combat USS, but most restorations are not monitored, so their long-term effectiveness is unknown. This study quantitatively evaluated a decade-old stream restoration in Fayetteville, Arkansas, to assess its effectiveness in combating USS and achieving set restoration goals, and to gain insights for future restoration projects. Restoration goals included decreasing erosion and sedimentation, …
Aggregation And Oligomerization Characterization Of Ss-Lactoglobulin Protein Using A Solid-State Nanopore Sensor, Mitu C. Acharjee, Brad Ledden, Brian Thomas, Xianglan He, Troy Messina, Jason Giurleo, David Talaga, Jiali Li
Aggregation And Oligomerization Characterization Of Ss-Lactoglobulin Protein Using A Solid-State Nanopore Sensor, Mitu C. Acharjee, Brad Ledden, Brian Thomas, Xianglan He, Troy Messina, Jason Giurleo, David Talaga, Jiali Li
Physics Faculty Publications and Presentations
Protein aggregation is linked to many chronic and devastating neurodegenerative human diseases and is strongly associated with aging. This work demonstrates that protein aggregation and oligomerization can be evaluated by a solid-state nanopore method at the single molecule level. A silicon nitride nanopore sensor was used to characterize both the amyloidogenic and native-state oligomerization of a model protein ß-lactoglobulin variant A (βLGa). The findings from the nanopore measurements are validated against atomic force microscopy (AFM) and dynamic light scattering (DLS) data, comparing βLGa aggregation from the same samples at various stages. By calibrating with linear and circular dsDNA, this study …
Pleated Plasma Membrane Complex In Spermatids Of The Western Siren, Siren Nettingi (Caudata: Sirenidae), S.E. Trauth
Pleated Plasma Membrane Complex In Spermatids Of The Western Siren, Siren Nettingi (Caudata: Sirenidae), S.E. Trauth
Journal of the Arkansas Academy of Science
I investigated the pleated plasma membrane complex of linear folds and biflagellar entities in developing spermatids of the Western Siren, Siren nettingi. My primary goal was to reveal the ultrastructural morphology of these distinctive cellular folds (usually 8 in number) as they support the flagellar formation of biflagellated sperm found in this salamander and in other members in the family Sirenidae. My results reveal that the biflagellar components (2 sets of axonemes, undulating membranes, and axial fibers), termed biflagellar complex, develop between folds or are attached onto these folds. The folds themselves are transitory and do not directly contribute to …
Contents, Discovery Editors
Contents, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 25 2024, Several Authors
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 25 2024, Several Authors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Mitochondrial Dna Variation In Honey Bee (Apis Mellifera) Colonies From Arkansas, U.S., Allen Szalanski
Mitochondrial Dna Variation In Honey Bee (Apis Mellifera) Colonies From Arkansas, U.S., Allen Szalanski
Entomology and Plant Pathology Faculty Publications and Presentations
This study characterized the mitochondrial DNA (mtDNA) genetic variation in Arkansas honey bee, Apis mellifera L., by sequencing a portion of the mitochondrial cytochrome oxidase (COI-COII) intergenic region). The samples were primarily of hobbyist-managed origin (n=180), as well as 32 feral colonies and two swarms. Of the 214 honey bee colonies and swarms sampled, 23 haplotypes were observed. The haplotypes were from the: A (African) (1.87%); C (South eastern European) (92.52%); M (Northern and Western European) (3.27%); and O (Near East and Middle East) lineages (2.34%). Six C lineage haplotypes were predominantly detected (n=189, 88.31%), all of which are common …
A Survey Of Strongyle Nematodes In New England Dairy Goats, D.J. Richardson, E.M. Wray, D. Watters, U. Hanif, E. Jalbert, E. Thompson, G. Trajkovic, A.R. Sirois, N. Pilotte
A Survey Of Strongyle Nematodes In New England Dairy Goats, D.J. Richardson, E.M. Wray, D. Watters, U. Hanif, E. Jalbert, E. Thompson, G. Trajkovic, A.R. Sirois, N. Pilotte
Journal of the Arkansas Academy of Science
The paucity of information concerning the occurrence of strongyle nematodes in New England dairy goats prompted a survey of 241 dairy goats from throughout New England. Of the 241 goats examined using the McMaster technique, 104 (42.7%) were infected with strongyles with a mean intensity (+ SE) of 369.7 + 45.8 eggs per gram. Subsequent molecular examination of 50 random samples from these goats revealed a prevalence of 88% infection specifically with Haemonchus contortus. Haemonchus contortus is the most important internal parasite of sheep and goats, exerting a crushing economic burden on the livestock industry worldwide due to lowered milk …
Inservice Needs Of Selected Arkansas Agriculture Teachers Related To Precision Agriculture, Henry O. Akwah, Donald M, Johnson, George W. Wardlow, Cengiz Koparan, Aurelie Poncet
Inservice Needs Of Selected Arkansas Agriculture Teachers Related To Precision Agriculture, Henry O. Akwah, Donald M, Johnson, George W. Wardlow, Cengiz Koparan, Aurelie Poncet
Agricultural Education, Communications and Technology Faculty Publications and Presentations
The purpose of this study was to determine selected Arkansas school-based agricultural education (SBAE) teachers’ perceptions of the importance, ability to teach, inservice needs, and barriers relative to incorporating precision agriculture (PA) into their programs. A non-probability sample (n = 44) of teachers participating in an introductory PA workshop completed the survey. Teachers rated each of the PA competencies as being above average or high importance but rated their ability to teach each competency as being none or below average. When competencies were grouped into seven PA topics, teachers had inservice needs for each topic with mean weighted discrepancy …
A Simple, Inexpensive Alkaline Method For Bacterial Dna Extraction From Environmental Samples For Pcr Surveillance And Microbiome Analyses, Abdulkarim Shwani, Bin Zuo, Adnan Alrubaye, Jiangchao Zhao, Douglas D. Rhoads
A Simple, Inexpensive Alkaline Method For Bacterial Dna Extraction From Environmental Samples For Pcr Surveillance And Microbiome Analyses, Abdulkarim Shwani, Bin Zuo, Adnan Alrubaye, Jiangchao Zhao, Douglas D. Rhoads
Poultry Science Faculty Publications and Presentations
DNA extraction for downstream molecular diagnostic applications can be an expensive, time-consuming process. We devised a method to quickly extract total bacterial DNA from environmental samples based on the sodium hydroxide lysis of cells with or without capture by magnetic beads for subsequent PCR or quantitative PCR. The final DNA extraction method using NaOH is extremely low-cost and can be completed in as little as 10 min at room temperature with dilution, or the DNA can be further purified using silica-coated paramagnetic beads. NaOH extraction was effective for Gram-negative and Gram-positive bacteria in samples from air, soil, sewage, food, laboratory …
Mitochondrial Dna Genetic Variation Of Feral And Managed Honey Bee, Apis Mellifera, Colonies From Oklahoma, Allen Szalanski
Mitochondrial Dna Genetic Variation Of Feral And Managed Honey Bee, Apis Mellifera, Colonies From Oklahoma, Allen Szalanski
Entomology and Plant Pathology Faculty Publications and Presentations
Understanding the genetic diversity of honey bees in North America provides valuable insight into the conservation, ecology, and evolution of this economically important insect. Here, we characterized the mitochondrial DNA (mtDNA) genetic variation in populations of the honey bee, Apis mellifera L., in Oklahoma by sequencing a portion of the mitochondrial cytochrome oxidase (COI-COII) intergenic region. The samples were primarily of feral origin (n = 164), as well as from 24 managed colonies. Samples were obtained from 50 of Oklahoma's 77 counties, which represented six distinct ecoregions. Of the 188 colonies sampled,19 distinct haplotypes were observed, which included: A (African) …
Expanded Range Of Nasutitermes Callimorphus Mathews, 1977 (Isoptera: Termitidae: Nasutitermitinae), Comparison With N. Corniger (Motschulsky, 1855) And N. Ephratae (Holmgren, 1910), And Synonymy Of N. Dasyopsis Thorne, 1989 Into N. Nigriceps (Haldeman, 1854), Allen Szalanski
Entomology and Plant Pathology Faculty Publications and Presentations
The imago of N. callimorphus is described for the first time. Nasutitermes callimorphus occurs from Mexico to Paraguay. Nasutitermes callimorphus is smaller in all measurements but generally resembles its widely distributed sympatric congeners, N. corniger (Motschulsky, 1855) and N. ephratae (Holmgren, 1910). Molecular phylogenetic analysis of a portion of the mitochondrial 16S rRNA gene and the COII mtDNA marker revealed that N. callimorphus forms a distinct clade using both maximum parsimony and maximum likelihood analysis. Unlike N. corniger and N. ephratae, N. callimorphus does not build epigeal or arboreal carton nests. We further regard N. dasyopsis Thorne, 1989 as a …
Keynote Address And Meeting Program, Academy Editors
Keynote Address And Meeting Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Journal Acknowledgements And Editorial Board, Academy Editors
Journal Acknowledgements And Editorial Board, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Instructions To Authors, Academy Editors
Instructions To Authors, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Distal Urogenital Anatomy And Epithelial Morphology In The Male Cajun Chorus Frog, Pseudacris Fouquettei (Anura: Hylidae), S.E. Trauth
Journal of the Arkansas Academy of Science
I examined the microanatomy of the distal urogenital system in male Cajun Chorus Frogs (Pseudacris fouquettei) from a small sample (n = 6) collected in central Arkansas in March 2018 and February 2023. Specifically, my primary objectives were to investigate the following: (1) the paired Wolffian (urogenital) ducts caudally from the kidneys to their merging with the urodeum of the cloaca, (2) the structure of seminal vesicles (if present), and (3) the epithelial morphologies among the distal urogenital tract, the posterior alimentary canal, and cloaca. My histological analysis confirmed the presence of ampullae (sperm storage structures) as mid-duct expansions of …
Use Of Google Earth Streetview To Evaluate Nesting By The Cliff Swallow (Petrochelidon Pyrrhonota) In Lowlands Of Eastern Arkansas, With Reports Of New Records, R. Tumlison, Z. Autrey
Use Of Google Earth Streetview To Evaluate Nesting By The Cliff Swallow (Petrochelidon Pyrrhonota) In Lowlands Of Eastern Arkansas, With Reports Of New Records, R. Tumlison, Z. Autrey
Journal of the Arkansas Academy of Science
Cliff Swallows (Petrochelidon pyrrhonota) typically construct their mud nests under the overhangs of cliffs. However, construction of concrete bridges and overpasses has provided suitable nesting structure in the last few decades. As the number of such nesting sites have increased, the breeding range also has expanded. We evaluated the use of Google Earth Streetview as a means of cheaply harvesting data regarding nesting distribution. The gourd-shaped nests of Cliff Swallows were easily discernible via available imagery, and we were able to document previously unreported nest sites of this species in 6 counties in eastern Arkansas (5 from imagery, 1 from …