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Articles 451 - 480 of 11692
Full-Text Articles in Life Sciences
Effect Of Temperature Cycling Pretreatment On The Thermal Stability Of Sm2(Co, Fe, Zr, Cu)17 Magnets In The Mild Temperature Range, Chaoqun Li, Dalong Cong, Bin Shao, Xiaowei Liu, Jianchun Sun, Yilong Ma
Effect Of Temperature Cycling Pretreatment On The Thermal Stability Of Sm2(Co, Fe, Zr, Cu)17 Magnets In The Mild Temperature Range, Chaoqun Li, Dalong Cong, Bin Shao, Xiaowei Liu, Jianchun Sun, Yilong Ma
Faculty, Staff and Student Publications
The irredeemable magnetic losses of Sm(Co, Fe, Zr, Cu)7.8 permanent magnets caused by oxidation are very important for their practical application. In this work, the simulated results with R2 ≥ 98% based on the data of the temperature cycling test and the long-term isothermal test for the original samples confirmed that the magnetic flux losses reached 9.38% after the 5000th cycle in range R.T.–300 °C, and 7.15% after oxidated at 180 °C for 10 years, respectively. Demagnetization curves showed that the low-temperature oxidation mainly led to the remanence attenuation, while the coercivity remained relatively stable. SEM observation and EDS …
Distribution And Soil Characteristics Associated With The Neches River Rose-Mallow (Hibiscus Dasycalyx), Morgan E. Langlinais
Distribution And Soil Characteristics Associated With The Neches River Rose-Mallow (Hibiscus Dasycalyx), Morgan E. Langlinais
Electronic Theses and Dissertations
The Neches River rose-mallow, Hibiscus dasycalyx, is a rare herbaceous perennial endemic to East Texas. The threatened, obligate wetland species is currently at risk of being lost in the wild due to habitat loss, encroachment of nonnative and native plant species, and hybridization with two other Hibiscus congeners, Hibiscus laevis and Hibiscus moscheutos. Known locations of each of the three Hibiscus species were used to measure select soil characteristics and habitat variables associated with each of the rose-mallows. H. dasycalyx was concluded to be associated with more fertile soils and slightly more canopy coverage than H. laevis and …
Loss Of Pex1 In Inner Ear Hair Cells Contributes To Cochlear Synaptopathy And Hearing Loss., Stephanie A Mauriac, Thibault Peineau, Aamir Zuberi, Cathleen Lutz, Gwénaëlle S G Géléoc
Loss Of Pex1 In Inner Ear Hair Cells Contributes To Cochlear Synaptopathy And Hearing Loss., Stephanie A Mauriac, Thibault Peineau, Aamir Zuberi, Cathleen Lutz, Gwénaëlle S G Géléoc
Faculty Research 2022
Peroxisome Biogenesis Disorders (PBD) and Zellweger syndrome spectrum disorders (ZSD) are rare genetic multisystem disorders that include hearing impairment and are associated with defects in peroxisome assembly, function, or both. Mutations in 13 peroxin (PEX) genes have been found to cause PBD-ZSD with ~70% of patients harboring mutations in PEX1. Limited research has focused on the impact of peroxisomal disorders on auditory function. As sensory hair cells are particularly vulnerable to metabolic changes, we hypothesize that mutations in PEX1 lead to oxidative stress affecting hair cells of the inner ear, subsequently resulting in hair cell degeneration and hearing loss. Global …
Insights Into Early-Stage Inbreeding Depression In Hawaiian Metrosideros, Rosalie Chaleunsouck
Insights Into Early-Stage Inbreeding Depression In Hawaiian Metrosideros, Rosalie Chaleunsouck
Undergraduate Research Symposium Podium Presentations
Inbreeding depression is the reduced biological fitness of offspring resulting from the conception of two genetically related gametes. Selfing, the fusion of gametes from the same individual, is the most extreme form of inbreeding, common in many plant species. Inbreeding depression is most prevalently seen at the seed-development stage (Levin, 1981).
Characterization Of Usp7 Substrates In The Brain, Jose Itorralba, Sage Boss, Shahraiz Akbar, Hayley Baker, Chinglan Chang
Characterization Of Usp7 Substrates In The Brain, Jose Itorralba, Sage Boss, Shahraiz Akbar, Hayley Baker, Chinglan Chang
Undergraduate Research Symposium Posters
Loss of function lesions in Ubiquitin-specific protease (USP) 7 are associated with intellectual disability, speech delay, autism spectrum disorder, and seizures. While the deubiquitinating activity of USP7 has been characterized in cancer, its role in neurological conditions is not understood. Here, we show that USP7 can regulate the development of the brain by localizing to synaptosomes in the hippocampus and stabilizing neural-specific substrates.
Analyzing Hippocampus Based Behavior In Model Mice, Tiria Carr
Analyzing Hippocampus Based Behavior In Model Mice, Tiria Carr
Undergraduate Research Symposium Lightning Talks
Model organism must discern between familiar and novel stimuli after delay. Hippocampal dependent processes involved in spatial pattern recognition. Latency in trial responses and reward collection is measured, as well as trial accuracy.
Quantification Of Sars-Cov-2 Prevalence Using Wastewater Surveillance, Moonis Ghani, Hayley Baker, Nabih Ghani, Anthony Harrington, Ching-Lan Chang
Quantification Of Sars-Cov-2 Prevalence Using Wastewater Surveillance, Moonis Ghani, Hayley Baker, Nabih Ghani, Anthony Harrington, Ching-Lan Chang
Undergraduate Research Symposium Lightning Talks
SARS-CoV-2 RNA was successfully detected in the wastewater samples. PMMoV concentrations varied little, meaning it was a valid control. The diversity of SARS-CoV-2 concentrations indicated varying levels of infection within different parts of the community. PCR and WGS can help determine viral load and identify variants.
Examining The Relationship Between Stomiiform Fish Morphology And Their Ecological Traits, Mikayla L. Twiss
Examining The Relationship Between Stomiiform Fish Morphology And Their Ecological Traits, Mikayla L. Twiss
All HCAS Student Capstones, Theses, and Dissertations
Trait-based ecology characterizes individuals’ functional attributes to better understand and predict their interactions with other species and their environments. Utilizing morphological traits to describe functional groups has helped group species with similar ecological niches that are not necessarily taxonomically related. Within the deep-pelagic fishes, the Order Stomiiformes exhibits high morphological and species diversity, and many species undertake diel vertical migration (DVM). While the morphology and behavior of stomiiform fishes have been extensively studied and described through taxonomic assessments, the connection between their form and function regarding their DVM types, morphotypes, and daytime depth distributions is not well known. Here, three …
Synthesis Of Novel Chiral Phosphorothioic Acid Organocatalysts And Application To Synthetic Methodology, Parsa Azaei
Synthesis Of Novel Chiral Phosphorothioic Acid Organocatalysts And Application To Synthetic Methodology, Parsa Azaei
Undergraduate Research Symposium Posters
Much research efforts have been centered towards the synthesis of novel Bronsted acid catalysts. These organocatalyst enable synthesis of natural products, pharmaceuticals, and bioactive small molecules under toxic-metal-free conditions by donating their protons, while not being consumed in the reaction. Chiral phosphorothioic acid have significant potential as novel organocatalysts due to their high modifiability of chirality and acidity under environmentally friendly conditions; however, synthesis of these organocatalysts are far and in between. Therefore, our research aimed to i) synthesize novel phosphorothioic acid organocatalysts and ii) to apply these novel catalysts toward new methodology development.
Differential Expression Of Photosynthetic Genes In Cryptophyte Algae (Hemiselmis Cryptochromatica Ccmp 1181), Chastity D. Aguilar
Differential Expression Of Photosynthetic Genes In Cryptophyte Algae (Hemiselmis Cryptochromatica Ccmp 1181), Chastity D. Aguilar
Biology Theses
Cryptophytes are a group of freshwater algae that have acquired photosynthesis through secondary endosymbiosis with a red alga and an unknown eukaryote heterotroph. Cryptophytes possess photosynthetic pigment-protein structures called phycobiliproteins (PBPs). Cryptophyte phycobiliproteins are composed of α and β-protein subunits and four chromophores (bilins). There are nine classes of cryptophyte PBPs that absorb different wavelengths of light based on the type of bilins covalently bound to the protein subunits. Three cryptophyte PBPs are phycoerythrins that give the algae a red appearance and six are phycocyanins that give the algae a blue to green appearance. Hemiselmis cryptochromatica (CCMP 1181) is a …
Nucleic Acid Extraction Of Human Immunodeficiency Virus From Municipal Wastewater, Fritz Vanderford, Hayley Baker, Ching-Lan Chang
Nucleic Acid Extraction Of Human Immunodeficiency Virus From Municipal Wastewater, Fritz Vanderford, Hayley Baker, Ching-Lan Chang
Undergraduate Research Symposium Lightning Talks
In 2021, globally there were ~ 38.4 million people living with Human immunodeficiency virus (HIV), ~650,000 people died from acquired immunodeficiency syndrome (AIDS) related illnesses, ~1.5 million people acquired HIV. In the US, ~1.9 million people had HIV at the end of 2019, ~30,635 people were diagnosed with HIV in 2020.
Groundwater Remediation Using Modified Biochar, Kers Ung-Watson, Ismail Abdulraheem, Nikki Tibayan, Suraj Pochampally
Groundwater Remediation Using Modified Biochar, Kers Ung-Watson, Ismail Abdulraheem, Nikki Tibayan, Suraj Pochampally
Undergraduate Research Symposium Posters
Biochar, a lightweight black residue made of carbon, has proved to be an effective adsorbent to remove TCE from groundwater. Not only is it an economical substitute for conventional adsorbents but it can be created by using a variety of organic materials. For this project, it will rely on walnut shell feedstock to create biochar as this had the best ability to adsorb TCE.
Musicality, Misophonia Sensitivity, And Responsiveness To Misophonia Videos, Alexis Rice, Jennifer Hsu, Kaela Omengan, Sivan Barashy
Musicality, Misophonia Sensitivity, And Responsiveness To Misophonia Videos, Alexis Rice, Jennifer Hsu, Kaela Omengan, Sivan Barashy
Undergraduate Research Symposium Posters
Misophonia sensitivity as measured by the A-MISO-S predicts emotional responses to misophonia trigger videos, but musical sophistication (Gold MSI scores) did not. A measure of real-time responses to videos can capture a meaningful aspect of misophonic experience in the general population. Future research should investigate whether more direct measures of musicality such as perceptual tasks will show a relationship between musicality and misophonic reactions.
Common Snook, Centropomus Undecimalis Neurocranium, Olivia Cantalupo, Madelyn Vieth, David Kerstetter
Common Snook, Centropomus Undecimalis Neurocranium, Olivia Cantalupo, Madelyn Vieth, David Kerstetter
All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series
Neurocranium from Common Snook, Centropomus undecimalis.
Novel Patterns For Nucleosome Positioning: From In Vitro To In Vivo, David Andrew Bates
Novel Patterns For Nucleosome Positioning: From In Vitro To In Vivo, David Andrew Bates
Theses and Dissertations
The fundamental unit of chromatin is the nucleosome, which consists of a core of eight proteins wrapped by DNA. This core is composed of four pairs of histone proteins: H2A, H2B, H3, and H4. The DNA wraps around the protein core ~1.7 times, facilitating compaction of DNA length in the cell. Further, the location of nucleosomes makes genomic elements encoded in the DNA, such as promoters or enhancers, accessible or inaccessible to RNA polymerase and transcription factors. Thus, where nucleosomes are located (or positioned), can play a major role in transcription or other cellular processes. Additionally, histone proteins are frequently …
Efficacy Of Antimicrobial Treatments In Vitro And On Fresh Produce Against Selected Foodborne Pathogens And Microbiome Diversity Amongst Blueberry Farms, Angelica Maria Abdallah Ruiz
Efficacy Of Antimicrobial Treatments In Vitro And On Fresh Produce Against Selected Foodborne Pathogens And Microbiome Diversity Amongst Blueberry Farms, Angelica Maria Abdallah Ruiz
Theses and Dissertations
This study focused on evaluating the antimicrobial activity of chlorine dioxide (ClO2) and different plant-based antimicrobials (carvacrol, thymol, and eugenol as bioactive compounds and muscadine extract- ME and blueberry extract- BBE as plant extracts) against selected foodborne pathogens under in vitro conditions and on produce (spinach and blueberries). In addition, bacterial microbiota associated with blueberries and blueberry farm environments from three different regions: Cundinamarca, Colombia; Mississippi, United States; and Guadalajara, Mexico, was determined. Under in vitro conditions, carvacrol and thymol were more effective (lower MICs and MBCs) than eugenol against Salmonella spp., Escherichia coli O157:H7 (MIC=MBC=0.2 mg/ml), and …
Seasonal Trends And Sampling Time Of Day On Overall Microbial Population And Indicator Organisms In Catfish Parts And Catfish Processing Environment, Maria Gabriela Hidalgo-Sindoni
Seasonal Trends And Sampling Time Of Day On Overall Microbial Population And Indicator Organisms In Catfish Parts And Catfish Processing Environment, Maria Gabriela Hidalgo-Sindoni
Theses and Dissertations
Commercial production of catfish is the leading aquaculture industry in the United States. Production in Mississippi, Louisiana, Alabama, and Arkansas representing 96% of the total catfish sales in the USA. In 2017, the USDA-FSIS added testing of generic Escherichia coli and Enterococcus to the sampling of Siluriformes. The incidence of Escherichia coli in fish and seafood has been associated with possible fecal matter contamination. However, this indicator bacteria could also be a part of the natural microflora of catfish ponds where processing plants collect hybrid catfish. Aerobes, Psychrotrophs, Coliforms, Escherichia coli, and Enterobacteriaceae counts among environmental, liquid and fish …
Animal Husbandry In The 21st Century: Application Of Ecological Theory And Precision Technology To Inform Understanding Of Modern Grazing Systems, Ira Lloyd Parsons
Animal Husbandry In The 21st Century: Application Of Ecological Theory And Precision Technology To Inform Understanding Of Modern Grazing Systems, Ira Lloyd Parsons
Theses and Dissertations
Ruminant animals comprise the greatest proportion of herbivores around the world, provide essential ecosystem services and human consumable protein by consuming grass and human inedible dietary fiber. Herbivory pressure alters plant communities and species diversity, effectively making grazing animals ecosystem engineers in dynamic ecosystems. Development of advanced computer processing power coupled with biometric and ecosystem sensors may be employed in the internet of things framework to create an integrated information system designed to inform understanding of grazing system function and animal energy balance. Towards this end, I utilized Bos indicus / Bos taurus crossbred steers (n = 20) across two …
Metagenomic Analysis Of Root-Associated Microbiome Of Healthy And Taproot Decline-Affected Soybeans And Identification Of Healthy Soybean Root Endophytes With Protective Activity Against The Causal Agent, Xylaria Necrophora, Uyen Wesser
Theses and Dissertations
Plant roots are associated with a diverse microbial community of bacteria and fungi. The root microbiome communities associate with the root surface or penetrate the superficial layers of root tissues. It is of high agronomic interest to characterize root microbiomes and identify microbes with beneficial effects on plant defense against pathogens. Soybean taproot decline (TRD) is an emerging soil-borne disease caused by a fungus classified as Xylaria necrophora, challenging to control and with devastating effects on yield. Our group has initiated a study of the soybean root microbiome with three primary experiments: (I) perform a comparative study of root …
Attitudes Towards Breastfeeding Among College Students At Mississippi State University, Kristin F. Williford
Attitudes Towards Breastfeeding Among College Students At Mississippi State University, Kristin F. Williford
Theses and Dissertations
Breastfeeding rates in America are lower than other high-income countries, with Mississippi having one of the lowest rates. A survey using the Iowa Infant Feeding Attitude Scale (IIFAS) was distributed twice to Mississippi State University students to understand their breastfeeding attitudes. Attitudes were determined by calculating a composite score and conducting statistical tests for significance. Knowledge between health and non-health related majors were explored by using five statements, and attitudes towards the statement “Breastmilk is the ideal food for babies” were compared across demographics. Of 642 respondents, the composite score was 57.3 out of 85, and all demographics had a …
Unraveling The Anti-Inflammatory Mechanisms And Efficacy Of Cannabidiol On The Progression Of A Murine Model Of Multiple Sclerosis From The Innate To The Adaptive Immune System To Clinical Symptoms, Christa Marie Frodella
Unraveling The Anti-Inflammatory Mechanisms And Efficacy Of Cannabidiol On The Progression Of A Murine Model Of Multiple Sclerosis From The Innate To The Adaptive Immune System To Clinical Symptoms, Christa Marie Frodella
Theses and Dissertations
Cannabidiol (CBD), a non-psychotropic phytocannabinoid with structural similarity to Δ 9 -tetrahydrocannabinol (THC), is currently being investigated as a therapeutic for its immunosuppressive effects. One disease for which CBD is extensively researched is multiple sclerosis (MS), a demyelinating, autoimmune disorder, and its murine model counterpart, experimental autoimmune encephalomyelitis (EAE). The focus of this dissertation aimed to analyze the transcriptomic brain pathways in EAE and its comparison to MS in addition to CBD’s immunosuppressive mechanisms in the innate and adaptive immune systems. Evidence presented here showed that transcriptomic signaling pathways in the EAE brain of mice with clinical symptoms were similar …
Evaluation Of Soybean [Glycine Max (L.) Merr.] Cultivar Response To Prophylactic Fungicide Application, Steven B. Stoker
Evaluation Of Soybean [Glycine Max (L.) Merr.] Cultivar Response To Prophylactic Fungicide Application, Steven B. Stoker
Theses and Dissertations
Soybean growers in the southern United States commonly deal with disease issues that can limit yield potential. As a result, growers have adopted prophylactic fungicide application targeted at specific growth stages as a standard management practice. However, yield responses to prophylactic applications have become sporadic over time. One major change that has occurred is adoption of cultivars with improved disease tolerances. Therefore, the objective of this research was to evaluate yield response of cultivars representing multiple genetic backgrounds to fungicides applied prophylactically at the R4 soybean growth stage. Experiments were conducted in 2020 and 2021 to determine the yield impact …
Food Insecurity In Nevada, Zachary Walusek
Food Insecurity In Nevada, Zachary Walusek
Undergraduate Research Symposium Lightning Talks
Defining the Food Insecurity Landscape, Methodology, Findings
Predicting The Next Pandemic: Utilizing Wastewater-Based Epidemiology As A Novel Technique For Detecting Mpox Dna, Austin Tang, Michael Moshi, Hayley Baker, Ching-Lan Chang
Predicting The Next Pandemic: Utilizing Wastewater-Based Epidemiology As A Novel Technique For Detecting Mpox Dna, Austin Tang, Michael Moshi, Hayley Baker, Ching-Lan Chang
Undergraduate Research Symposium Lightning Talks
Mpox cases are trending downward in Las Vegas, aligning with national trends. The study demonstrates that it is possible to extract mpox DNA directly from wastewater and quantify the genetic material using qPCR. This research indicates that WBE can be utilized to give a relative abundance of virual nucleic acids in wastewater, giving opportunities for early-warning systems and other public health interventions. Mpox remains a global threat to public health, continued surveillance of MPXV using wastewater is necessary to ensure that we can detect unusual spike in viral DNA level. Mpox detected in the wastewater samples will be sequences to …
Electrochemical Inactivation Of Tobacco Mosaic Virus: A Novel Vaccine Method, Angelica Diaz
Electrochemical Inactivation Of Tobacco Mosaic Virus: A Novel Vaccine Method, Angelica Diaz
Undergraduate Research Symposium Posters
We tested the effectiveness of using electrochemistry to irreversibly damage Tobacco Mosaic Virus (TMV). Hypothesis: By utilizing the acidic properties of DNA and RNA, viral genetic material can be irreversibly and selectively damaged using electrochemical methods. Technique could assist in development of highly targeted and effective vaccines.
Characterization Of The Thermophilic Xlanase Fsa272 From Candidatus Fervidibacter Sacchari Belonging To Glycoside Hydrolase Family Gh10, Nicole Torosian, Jonathan K. Covington, Allison M. Cook, Nancy O. Nou, Jan-Fang Cheng
Characterization Of The Thermophilic Xlanase Fsa272 From Candidatus Fervidibacter Sacchari Belonging To Glycoside Hydrolase Family Gh10, Nicole Torosian, Jonathan K. Covington, Allison M. Cook, Nancy O. Nou, Jan-Fang Cheng
Undergraduate Research Symposium Posters
Candidatus Fervidibacter sacchari is a novel, facultatively anaerobic, hyperthermophilic bacterium found in terrestrial geothermal springs globally. Its genome encodes 115 putative glycoside hydrolase enzymes that are predicted to hydrolyze glycosidic bonds between carbohydrates. Fsa272, a member of the glycoside hydrolase family 10, was synthesized and cloned into Escherichia coli strain T7 Express. The transformed E. coli was grown with LB broth and ampicillin at 37°C. Fsa272 expression was induced with isopropylthio-beta-galactoside (IPTG), and the lysate was heat purified for 15 minutes at 80° C. The 3,5-dinitrosalicylic acid assay identified xylanase activity with a pH range of 4.5 to 10.5 (pHopt …
Growth Of Pseudocotalpa Giulianii Larvae In Sand From Different Dune Sources, Cosset Hernandez Pena, Mandy Mountain
Growth Of Pseudocotalpa Giulianii Larvae In Sand From Different Dune Sources, Cosset Hernandez Pena, Mandy Mountain
Undergraduate Research Symposium Posters
Pseudocotalpa giulianii (PSGU) is an endemic species known to inhabit two sand dunes in Nye County, Nevada: Big Dune Recreational Area and Lava Dune. Differences in sand properties between Big Dune and Lava Dune could impact survival and growth of the larvae of P. giulianii. Use of permitted off-road vehicles (ORV) in Big Dune can impact its habitats and cause disturbances to local populations, including the Giuliani Dune Scarab as ORV activity is correlated with changes in dune vegetation. Lava Dune has no permitted ORV activity, however, differences in sand composition, including eroded basalt, have the potential to influence the …
Investigating The Impact Of Dividing Attention On Auditory And Visual Object Memory, Sharica Lee, Alexa Salomon, Laura L.S. Werner, Kevin D. Mohawk, Maggie Mcmullin
Investigating The Impact Of Dividing Attention On Auditory And Visual Object Memory, Sharica Lee, Alexa Salomon, Laura L.S. Werner, Kevin D. Mohawk, Maggie Mcmullin
Undergraduate Research Symposium Posters
Recently, we found that dividing attention reduced recollection and familiarity for visual objects, but a different pattern emerged for auditory object memory: auditory object recollection was not affected by dividing attention. This could be attributable to differing levels of baseline performance with visual memory far exceeding auditory memory. Thus, we attempted to equate baseline performance in both modalities in order to adequately investigate the previous findings.
Localization Of Ipmk, Braden Sio
Localization Of Ipmk, Braden Sio
Undergraduate Research Symposium Posters
Inositol Polyphosphate Multikinase (IPMK) is a relatively new gene found in mammalian cells. To determine where I should further conduct our research, I localized this gene within HEK-293 cells. For this study, HEK-293 cells are used. These cells are easily cultured and transfected, both of which are needed for this study. IPMK tagged with Green Fluorescent Protein is transfected into our test group. The control group is transfected with only Green Fluorescent Protein. After transfecting the HEK-293 cells, the cells are put under a fluorescent microscope under the GFP setting. In the HEK-293 cells that were transfected with IPMK GFP, …
Teaching How To Recycle Through The Medium Of Virtual Reality, Nathan Kassai
Teaching How To Recycle Through The Medium Of Virtual Reality, Nathan Kassai
Undergraduate Research Symposium Posters
Students, especially children in elementary and middle school, have difficulty focusing and or absorbing information from their courses. The problem lies in the scarcity of hands-on/interactive elements in classrooms as most lectures contain topics most students would be interested in but are presented in a monotonous way. To properly educate and inspire students to work on improving their academic knowledge, alternative educational mediums must be sought. Such mediums like Virtual and Augmented Reality allow students to interact with virtual objects to learn more about a wide variety of subjects, hence increasing their engagement and enjoyment in any particular topic. The …