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Large Uncertainties In Co2 Water–Air Outgassing Estimation With Gas Exchange Coefficient Kt For A Large Lowland River, Anamika Dristi, Y. Jun Xu Jul 2023

Large Uncertainties In Co2 Water–Air Outgassing Estimation With Gas Exchange Coefficient Kt For A Large Lowland River, Anamika Dristi, Y. Jun Xu

Faculty Publications

Aquatic CO2 emission is typically estimated (i.e., not measured) through a gas exchange balance. Several factors can affect the estimation, primarily flow velocity and wind speed, which can influence a key parameter, the gas exchange coefficient KT in the balancing approach. However, our knowledge of the uncertainty of predictions using these factors is rather limited. In this study, we conducted a numeric assessment on the impact of river flow velocity and wind speed on KT and the consequent CO2 emission rate. As a case study, we utilized 3-year (2019–2021) measurements on the partial pressure of dissolved carbon dioxide (pCO2) in …

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Influence Of Membrane Pore-Size On The Recovery Of Endogenous Viruses From Wastewater Using An Adsorption-Extraction Method, Warish Ahmed, Wendy J.M. Smith, Kwanrawee Sirikanchana, Masaaki Kitajima, Aaron Bivins, Stuart L. Simpson Jul 2023

Influence Of Membrane Pore-Size On The Recovery Of Endogenous Viruses From Wastewater Using An Adsorption-Extraction Method, Warish Ahmed, Wendy J.M. Smith, Kwanrawee Sirikanchana, Masaaki Kitajima, Aaron Bivins, Stuart L. Simpson

Faculty Publications

The ongoing COVID-19 pandemic has emphasized the significance of wastewater surveillance in monitoring and tracking the spread of infectious diseases, including SARS-CoV-2. The wastewater surveillance approach detects genetic fragments from viruses in wastewater, which could provide an early warning of outbreaks in communities. In this study, we determined the concentrations of four types of endogenous viruses, including non-enveloped DNA (crAssphage and human adenovirus 40/41), non-enveloped RNA (enterovirus), and enveloped RNA (SARS-CoV-2) viruses, from wastewater samples using the adsorption-extraction (AE) method with electronegative HA membranes of different pore sizes (0.22, 0.45, and 0.80 µm). Our findings showed that the membrane with …

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A Modified-Herringbone Micromixer For Assessing Zebrafish Sperm (Mags), Jorge A. Belgodere, Mustafa Alam, Valentino E. Browning, Jason Eades, Jack North, Julie A. Armand, Yue Liu, Terrence R. Tiersch, W. Todd Monroe Jul 2023

A Modified-Herringbone Micromixer For Assessing Zebrafish Sperm (Mags), Jorge A. Belgodere, Mustafa Alam, Valentino E. Browning, Jason Eades, Jack North, Julie A. Armand, Yue Liu, Terrence R. Tiersch, W. Todd Monroe

Faculty Publications

Sperm motility analysis of aquatic model species is important yet challenging due to the small sample volume, the necessity to activate with water, and the short duration of motility. To achieve standardization of sperm activation, microfluidic mixers have shown improved reproducibility over activation by hand, but challenges remain in optimizing and simplifying the use of these microdevices for greater adoption. The device described herein incorporates a novel micromixer geometry that aligns two sperm inlet streams with modified herringbone structures that split and recombine the sample at a 1:6 dilution with water to achieve rapid and consistent initiation of motility. The …

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Obesogens And Obesity: State-Of-The-Science And Future Directions Summary From A Healthy Environment And Endocrine Disruptors Strategies Workshop, Jerrold J. Heindel, Jessica A. Alvarez, Ella Atlas, Matthew C. Cave, Vaia Lida Chatzi, David Collier, Barbara Corkey, Douglas Fischer, Michael I. Goran, Sarah Howard, Scott Kahan, Matthias Kayhoe, Suneil Koliwad, Catherine M. Kotz, Michele La Merrill, Tim Lobstein, Carey Lumeng, David S. Ludwig, Robert H. Lustig, Pete Myers, Angel Nadal, Leonardo Trasande, Leanne M. Redman, Matthew S. Rodeheffer, Robert M. Sargis, Jacqueline M. Stephens, Thomas R. Ziegler, Bruce Blumberg Jul 2023

Obesogens And Obesity: State-Of-The-Science And Future Directions Summary From A Healthy Environment And Endocrine Disruptors Strategies Workshop, Jerrold J. Heindel, Jessica A. Alvarez, Ella Atlas, Matthew C. Cave, Vaia Lida Chatzi, David Collier, Barbara Corkey, Douglas Fischer, Michael I. Goran, Sarah Howard, Scott Kahan, Matthias Kayhoe, Suneil Koliwad, Catherine M. Kotz, Michele La Merrill, Tim Lobstein, Carey Lumeng, David S. Ludwig, Robert H. Lustig, Pete Myers, Angel Nadal, Leonardo Trasande, Leanne M. Redman, Matthew S. Rodeheffer, Robert M. Sargis, Jacqueline M. Stephens, Thomas R. Ziegler, Bruce Blumberg

Division of Basic Science Faculty Publications

On September 7 and 8, 2022, Healthy Environment and Endocrine Disruptors Strategies, an Environmental Health Sciences program, convened a scientific workshop of relevant stakeholders involved in obesity, toxicology, or obesogen research to review the state of the science regarding the role of obesogenic chemicals that might be contributing to the obesity pandemic. The workshop's objectives were to examine the evidence supporting the hypothesis that obesogens contribute to the etiology of human obesity; to discuss opportunities for improved understanding, acceptance, and dissemination of obesogens as contributors to the obesity pandemic; and to consider the need for future research and potential mitigation …

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Current Discoveries And Future Implications Of Eating Disorders, Bing Feng, Jerney Harms, Emily Chen, Peiyu Gao, Pingwen Xu, Yanlin He Jul 2023

Current Discoveries And Future Implications Of Eating Disorders, Bing Feng, Jerney Harms, Emily Chen, Peiyu Gao, Pingwen Xu, Yanlin He

Division of Basic Science Faculty Publications

Eating disorders (EDs) are characterized by severe disturbances in eating behaviors and can sometimes be fatal. Eating disorders are also associated with distressing thoughts and emotions. They can be severe conditions affecting physical, psychological, and social functions. Preoccupation with food, body weight, and shape may also play an important role in the regulation of eating disorders. Common eating disorders have three major types: anorexia nervosa (AN), bulimia nervosa (BN), and binge eating disorder (BED). In some cases, EDs can have serious consequences for an individual’s physical and mental health. These disorders often develop during adolescence or early adulthood and affect …

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Measuring In Vivo Adipose Tissue Kinetics In Humans Using The Deuterium (2h)-Labeling Approach, Dereck Kibodeaux, Jonathan Savoie, Eric Ravussin, Mark Fitch, Marc K. Hellerstein, Ursula White Jul 2023

Measuring In Vivo Adipose Tissue Kinetics In Humans Using The Deuterium (2h)-Labeling Approach, Dereck Kibodeaux, Jonathan Savoie, Eric Ravussin, Mark Fitch, Marc K. Hellerstein, Ursula White

Clinical Research Faculty Publications

White adipose tissue is a highly plastic organ that is necessary to maintain whole-body energy homeostasis. The adipose tissue mass and changes in the fat mass or distribution are regulated by changes in the synthesis and breakdown (i.e., turnover) of adipose cells and triacylglycerols. Evidence suggests that the manner and magnitude of subcutaneous adipose tissue expansion (i.e., hypertrophy vs. hyperplasia) and turnover can influence metabolic health, as adipogenesis has been implicated in the pathogenesis of obesity and related diseases. Despite the potential role of adipose turnover in human health, there is a lack of knowledge about the in vivo kinetics …

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Current Status Of Us Soil Test Phosphorus And Potassium Recommendations And Analytical Methods, Sarah E. Lyons, Jason D. Clark, Deanna L. Osmond, Md Rasel Parvej, Austin W. Pearce, Nathan A. Slaton, John T. Spargo Jul 2023

Current Status Of Us Soil Test Phosphorus And Potassium Recommendations And Analytical Methods, Sarah E. Lyons, Jason D. Clark, Deanna L. Osmond, Md Rasel Parvej, Austin W. Pearce, Nathan A. Slaton, John T. Spargo

Faculty Publications

Soil testing is the foundation of fertilizer recommendations in the United States. Fertilizer recommendations have primarily been developed by land-grant universities with limited coordination among programs. The individual state approach to develop fertilizer recommendations has resulted in discrepancies in recommended soil sampling protocols, soil analysis methods, and fertilizer recommendations at similar soil nutrient levels. A national survey was developed to summarize the status of soil testing and fertility work in the United States to inform future collaborative efforts among states and regions and identify opportunities to harmonize recommendation guidelines. Topics included relevant funding, multi-state collaborations, state soil-test recommendations and related …

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Extensive Independent Amplification Of Platy-1 Retroposons In Tamarins, Genus Saguinus, Jessica M. Storer, Jerilyn A. Walker, Thomas O. Beckstrom, Mark A. Batzer Jul 2023

Extensive Independent Amplification Of Platy-1 Retroposons In Tamarins, Genus Saguinus, Jessica M. Storer, Jerilyn A. Walker, Thomas O. Beckstrom, Mark A. Batzer

Faculty Publications

Platy-1 retroposons are short interspersed elements (SINEs) unique to platyrrhine primates. Discovered in the common marmoset (Callithrix jacchus) genome in 2016, these 100 bp mobile element insertions (MEIs) appeared to be novel drivers of platyrrhine evolution, with over 2200 full-length members across 62 different subfamilies, and strong evidence of ongoing proliferation in C. jacchus. Subsequent characterization of Platy-1 elements in Aotus, Saimiri and Cebus genera, suggested that the widespread mobilization detected in marmoset (family Callithrichidae) was perhaps an anomaly. Two additional Callithrichidae genomes are now available, a scaffold level genome assembly for Saguinus imperator (tamarin; SagImp_v1) and a chromosome-level assembly …

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Exploring Barriers To Sars-Cov-2 Testing Uptake In Underserved Black Communities In Louisiana, Peter T. Katzmarzyk, Candice A. Myers, Michelle R. Nelson, Kara D. Denstel, Emily F. Mire, Robert L. Newton, Stephanie T. Broyles, John P. Kirwan Jul 2023

Exploring Barriers To Sars-Cov-2 Testing Uptake In Underserved Black Communities In Louisiana, Peter T. Katzmarzyk, Candice A. Myers, Michelle R. Nelson, Kara D. Denstel, Emily F. Mire, Robert L. Newton, Stephanie T. Broyles, John P. Kirwan

Division of Basic Science Faculty Publications

Objective: To collect qualitative data on approaches that can potentially reduce barriers to, and create strategies for, increasing SARS-CoV-2 testing uptake in underserved Black communities in Louisiana. Methods: A series of eight focus groups, including 41 participants, were conducted in primarily Black communities. The Nominal Group Technique (NGT) was used to determine perceptions of COVID-19 as a disease, access to testing, and barriers limiting testing uptake. Results: Common barriers to SARS-CoV-2 testing were identified as lack of transportation, misinformation/lack of information, lack of time/long wait times, fear of the test being uncomfortable and/or testing positive, the cost of testing, and …

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Association Between Maternal And Infant Screen Time With Child Growth And Development: A Longitudinal Study, Chelsea L. Kracht, Leanne M. Redman, Jayne Bellando, Rebecca A. Krukowski, Aline Andres Jul 2023

Association Between Maternal And Infant Screen Time With Child Growth And Development: A Longitudinal Study, Chelsea L. Kracht, Leanne M. Redman, Jayne Bellando, Rebecca A. Krukowski, Aline Andres

Clinical Research Faculty Publications

Background: Sedentary screen time is an early, modifiable risk factor for obesity and poor child development. Objectives: To examine the relationship between maternal and infant screen time with child growth and development. Methods: Pregnant women were recruited for a cohort study related to maternal and infant development. Screen time was assessed in mothers during pregnancy, and subsequently in children at 3 months, 12 months, and 24 months of age. Child anthropometry was measured, and nuclear magnetic resonance quantified child fat mass. Fat mass index (FMI) was calculated. The Bayley Scales of Infant Development-III were used to assess child development. Linear …

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A Feasibility Study Of The Combination Of Intranasal Insulin With Dulaglutide For Cognition In Older Adults With Metabolic Syndrome At High Dementia Risk – Study Rationale And Design, Tal Davidy, Iscka Yore, Tali Cukierman-Yaffe, Ramit Ravona-Springer, Abigail Livny, Orit H. Lesman-Segev, Yossi Azuri, Owen Carmichael, Dimitrios Kapogiannis, Henrik Zetterberg, Hung Mo Lin, Mary Sano, Michal Schnaider Beeri Jul 2023

A Feasibility Study Of The Combination Of Intranasal Insulin With Dulaglutide For Cognition In Older Adults With Metabolic Syndrome At High Dementia Risk – Study Rationale And Design, Tal Davidy, Iscka Yore, Tali Cukierman-Yaffe, Ramit Ravona-Springer, Abigail Livny, Orit H. Lesman-Segev, Yossi Azuri, Owen Carmichael, Dimitrios Kapogiannis, Henrik Zetterberg, Hung Mo Lin, Mary Sano, Michal Schnaider Beeri

Clinical Research Faculty Publications

Introduction: We present the rationale and design of a double-blind placebo-controlled feasibility trial combining intranasal insulin (INI) with dulaglutide, a GLP-1 receptor agonist, to improve cognition in older adults with metabolic syndrome (MetS) and mild cognitive impairment (MCI). Since both INI and dulaglutide have beneficial effects on the cerebrovascular disease (CVD), we anticipate that improved CVD will underlie the hypothesized cognitive benefits. Methods: This 12-months trial will include 80 older adults aged > 60 with MetS and MCI, randomized to 4 groups: INI/dulaglutide injection, intranasal placebo/dulaglutide injection, INI/placebo injection, and intranasal placebo/placebo injection. Feasibility of combining INI with dulaglutide will be …

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Gene Editing Provides A Tool To Investigate Genes Involved In Reproduction Of Pigs, Rodney D. Geisert, Destiny N. Johns, Caroline A. Pfeiffer, Riley M. Sullivan, Caroline G. Lucas, Constantine A. Simintiras, Bethany K. Redel, Kevin D. Wells, Thomas E. Spencer, Randall S. Prather Jul 2023

Gene Editing Provides A Tool To Investigate Genes Involved In Reproduction Of Pigs, Rodney D. Geisert, Destiny N. Johns, Caroline A. Pfeiffer, Riley M. Sullivan, Caroline G. Lucas, Constantine A. Simintiras, Bethany K. Redel, Kevin D. Wells, Thomas E. Spencer, Randall S. Prather

Faculty Publications

CRISPR-Cas9 gene editing technology provides a method to generate loss-of-function studies to investigate, in vivo, the specific role of specific genes in regulation of reproduction. With proper design and selection of guide RNAs (gRNA) designed to specifically target genes, CRISPR-Cas9 gene editing allows investigation of factors proposed to regulate biological pathways involved with establishment and maintenance of pregnancy. The advantages and disadvantages of using the current gene editing technology in a large farm species is discussed. CRISPR-Cas9 gene editing of porcine conceptuses has generated new perspectives for the regulation of endometrial function during the establishment of pregnancy. The delicate orchestration …

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Medical Libraries And Their Complicated Past: An Exploration Of The Historical Connections Between Medical Collections And Racial Science, Raymond Pun, Patrice R. Green, Nicollette Davis Jul 2023

Medical Libraries And Their Complicated Past: An Exploration Of The Historical Connections Between Medical Collections And Racial Science, Raymond Pun, Patrice R. Green, Nicollette Davis

Faculty Publications

For over a millennium, libraries and library workers have advanced the knowledge of human science by building, preserving, and sharing collections and research. Historically, libraries have also aligned their institutional responsibilities to adhere to and support the values and virtues of oppressive and colonial practices. Library history has shown the mistreatments and denials of information access of marginalized groups. The history of libraries in the health and medical sciences reveals how these institutions and their workers have preserved and circulated research studies perpetuating racial science. This commentary highlights how such institutions shape and contribute to racial science in the field …

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Economic Viability Of Implementing Structural Health Monitoring Systems On The Support Structures Of Bottom-Fixed Offshore Wind, Mario Vieira, Brian Snyder, Elsa Henriques, Craig White, Luis Reis Jul 2023

Economic Viability Of Implementing Structural Health Monitoring Systems On The Support Structures Of Bottom-Fixed Offshore Wind, Mario Vieira, Brian Snyder, Elsa Henriques, Craig White, Luis Reis

Faculty Publications

Offshore wind (OSW) energy is a renewable source with strong prospects of development that may decisively contribute towards energy independence. Offshore wind is, however, not yet ubiquitously cost competitive, and frequently requires support schemes to finance its extensive capital requirements. Therefore, cost reduction strategies are necessary for the future development of offshore wind technologies. Even if structural health monitoring (SHM) systems are currently applied for the inspection of critical mechanical structures, they have not been the focus of research from offshore wind stakeholders. The main goal of this study is to evaluate the viability of SHM systems on the support …

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Effects Of Alkylation On Potency Of Benz[A]Anthracene For Ahr2 Transactivation In Nine Species Of Freshwater Fish, Justin Dubiel, Hunter Johnson, Andreas N.M. Eriksson, A. Hontela, Jon A. Doering, Steve Wiseman Jul 2023

Effects Of Alkylation On Potency Of Benz[A]Anthracene For Ahr2 Transactivation In Nine Species Of Freshwater Fish, Justin Dubiel, Hunter Johnson, Andreas N.M. Eriksson, A. Hontela, Jon A. Doering, Steve Wiseman

Faculty Publications

Polycyclic aromatic hydrocarbons (PAHs) are naturally occurring or anthropogenic organic chemicals that can activate the aryl hydrocarbon receptor 2 (AhR2) and induce toxicity in fishes. Alkyl PAHs are more abundant than nonalkylated PAHs in certain environmental matrices and there is growing evidence that alkylation can increase potency, dependent on the position of alkylation. However, it is unknown if the effect of alkylation on potency is conserved across species. In addition, relatively little is known regarding the extent of interspecies variation in sensitivity to PAHs and alkyl PAHs. Therefore, objectives of the present study were to characterize potency of benz[a]anthracene (BAA) …

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Simulation Of Radioactive Plume Transport In The Atmosphere Including Dynamics Of Particle Aggregation And Breakup, Alexander I. Wiechert, Austin P. Ladshaw, Yong Ha Kim, Costas Tsouris, Sotira Yiacoumi Jul 2023

Simulation Of Radioactive Plume Transport In The Atmosphere Including Dynamics Of Particle Aggregation And Breakup, Alexander I. Wiechert, Austin P. Ladshaw, Yong Ha Kim, Costas Tsouris, Sotira Yiacoumi

Faculty Publications

Accurate prediction of the atmospheric transport of debris particles relies heavily on our knowledge of the size distribution of the particles within a debris cloud. Assuming a fixed particle size during simulations is not always viable since the size distribution of the debris can change during transport. Various microphysical processes, such as aggregation and breakup, influence debris particles and dictate any changes to the size distribution. To track those changes that can occur, a population balance model can be adopted and instituted within a model framework. Nonetheless, many of the models that simulate the transport of radioactive debris following a …

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A Cross-Correlation Study Between Icecube Neutrino Events And The Fermi Unresolved Gamma-Ray Sky, Michela Negro, Milena Crnogorčević, Eric Burns, Eric Charles, Lea Marcotulli, Regina Caputo Jul 2023

A Cross-Correlation Study Between Icecube Neutrino Events And The Fermi Unresolved Gamma-Ray Sky, Michela Negro, Milena Crnogorčević, Eric Burns, Eric Charles, Lea Marcotulli, Regina Caputo

Faculty Publications

With the coincident detections of electromagnetic radiation together with gravitational waves (GW170817) or neutrinos (TXS 0506+056), the new era of multimessenger astrophysics has begun. Of particular interest are the searches for correlation between the high-energy astrophysical neutrinos detected by the IceCube Observatory and gamma-ray photons detected by the Fermi Large Area Telescope (LAT). So far, only sources detected by the LAT have been considered in correlation with IceCube neutrinos, neglecting any emission from sources too faint to be resolved individually. Here we present the first cross-correlation analysis considering the unresolved gamma-ray background (UGRB) and IceCube events. We perform a thorough …

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Transcription Factor Pecs Mediates Agrobacterium Fabrum Fitness And Survival, George C. Nwokocha, Prava Adhikari, Asif Iqbal, Hannah Elkholy, William T. Doerrler, John C. Larkin, Anne Grove Jul 2023

Transcription Factor Pecs Mediates Agrobacterium Fabrum Fitness And Survival, George C. Nwokocha, Prava Adhikari, Asif Iqbal, Hannah Elkholy, William T. Doerrler, John C. Larkin, Anne Grove

Faculty Publications

The transcriptional regulator PecS is encoded by select bacterial pathogens. For instance, in the plant pathogen Dickeya dadantii, PecS controls a range of virulence genes, including pectinase genes and the divergently oriented gene pecM, which encodes an efflux pump through which the antioxidant indigoidine is exported. In the plant pathogen Agrobacterium fabrum (formerly named Agrobacterium tumefaciens), the pecS-pecM locus is conserved. Using a strain of A. fabrum in which pecS has been disrupted, we show here that PecS controls a range of phenotypes that are associated with bacterial fitness. PecS represses flagellar motility and chemotaxis, which are processes that are …

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Reducing The Generation Time In Winter Wheat Cultivars Using Speed Breeding, Adam Schoen, Sydney Wallace, Meghan Fisher Holbert, Gina Brown-Guidera, Stephen Harrison, Paul Murphy, Nicholas Sanantonio, David Van Sanford, Richard Boyles, Mohamed Mergoum, Nidhi Rawat, Vijay Tiwari Jul 2023

Reducing The Generation Time In Winter Wheat Cultivars Using Speed Breeding, Adam Schoen, Sydney Wallace, Meghan Fisher Holbert, Gina Brown-Guidera, Stephen Harrison, Paul Murphy, Nicholas Sanantonio, David Van Sanford, Richard Boyles, Mohamed Mergoum, Nidhi Rawat, Vijay Tiwari

Faculty Publications

Reducing generation time is critical to achieving the goals of genetic gain in important crops like wheat (Triticum aestivum). Speed breeding (SB) has been shown to considerably reduce generation times in crop plants. Unlike spring wheat cultivars, winter wheat varieties require typically 6–9 weeks of cold treatment, called vernalization, for flowering which extends the generation time for the development of improved winter wheat cultivars. Here, we optimized the SB method using a set of 48 diverse soft red winter wheat (SRWW) cultivars by testing vernalization duration, light and temperature requirements, and the viability of seeds harvested after different durations post-anthesis …

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Multi-Functional Boron-Delivery Agents For Boron Neutron Capture Therapy Of Cancers, Sebastian O. Oloo, Kevin M. Smith, Maria Da Graça H. Vicente Jul 2023

Multi-Functional Boron-Delivery Agents For Boron Neutron Capture Therapy Of Cancers, Sebastian O. Oloo, Kevin M. Smith, Maria Da Graça H. Vicente

Faculty Publications

Boron neutron capture therapy (BNCT) is a binary cancer treatment that involves the irradiation of 10B-containing tumors with low-energy neutrons (thermal or epithermal). The alpha particles and recoiling Li nuclei that are produced in the 10B-capture nuclear reaction are high-linear-energy transfer particles that destroy boron-loaded tumor cells; therefore, BNCT has the potential to be a localized therapeutic modality. Two boron-delivery agents have been used in clinical trials of BNCT in patients with malignant brain tumors, cutaneous melanoma, or recurrent tumors of the head and neck region, demonstrating the potential of BNCT in the treatment of difficult cancers. A …

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Population-Specific Responses In Eastern Oysters Exposed To Low Salinity In The Northern Gulf Of Mexico, Kyle A. Sirovy, Sandra M. Casas, Jerome F. La Peyre, Morgan W. Kelly Jul 2023

Population-Specific Responses In Eastern Oysters Exposed To Low Salinity In The Northern Gulf Of Mexico, Kyle A. Sirovy, Sandra M. Casas, Jerome F. La Peyre, Morgan W. Kelly

Faculty Publications

Eastern oysters, Crassostrea virginica, are facing rapid environmental changes in the northern Gulf of Mexico and can respond to these changes via plasticity or evolution. Plastic responses can immediately buffer against environmental changes, although this buffering may impact the organism’s ability to evolve in subsequent generations. While plasticity and evolution are not mutually exclusive, the relative contribution and interaction between them remains unclear. In this study, we investigated the roles of plastic and evolved responses of C. virginica acclimated to low salinity using a common garden experiment with four populations exposed to two salinities. We used three transcriptomic analyses (edgeR, …

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Refining 2svca Method For Measuring Telehealth Accessibility Of Primary Care Physicians In Baton Rouge, Louisiana, Lingbo Liu, Jennifer Alford-Teaster, Tracy Onega, Fahui Wang Jul 2023

Refining 2svca Method For Measuring Telehealth Accessibility Of Primary Care Physicians In Baton Rouge, Louisiana, Lingbo Liu, Jennifer Alford-Teaster, Tracy Onega, Fahui Wang

Faculty Publications

Equity in health care delivery is a longstanding concern of public health policy. Telehealth is considered an important way to level the playing field by broadening health services access and improving quality of care and health outcomes. This study refines the recently developed “2-Step Virtual Catchment Area (2SVCA) method” to assess the telehealth accessibility of primary care in the Baton Rouge Metropolitan Statistical Area, Louisiana. The result is compared to that of spatial accessibility via physical visits to care providers based on the popular 2-Step Floating Catchment Area (2SFCA) method. The study shows that both spatial and telehealth accessibilities decline …

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Computational Materials Design For Ceramic Nuclear Waste Forms Using Machine Learning, First-Principles Calculations, And Kinetics Rate Theory, Jianwei Wang, Dipta B. Ghosh, Zelong Zhang Jul 2023

Computational Materials Design For Ceramic Nuclear Waste Forms Using Machine Learning, First-Principles Calculations, And Kinetics Rate Theory, Jianwei Wang, Dipta B. Ghosh, Zelong Zhang

Faculty Publications

Ceramic waste forms are designed to immobilize radionuclides for permanent disposal in geological repositories. One of the principal criteria for the effective incorporation of waste elements is their compatibility with the host material. In terms of performance under environmental conditions, the resistance of the waste forms to degradation over long periods of time is a critical concern when they are exposed to natural environments. Due to their unique crystallographic features and behavior in nature environment as exemplified by their natural analogues, ceramic waste forms are capable of incorporating problematic nuclear waste elements while showing promising chemical durability in aqueous environments. …

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Three-Dimensional Scaffolds For Bone Tissue Engineering, Harish Chinnasami, Mohan Kumar Dey, Ram Devireddy Jul 2023

Three-Dimensional Scaffolds For Bone Tissue Engineering, Harish Chinnasami, Mohan Kumar Dey, Ram Devireddy

Faculty Publications

Immobilization using external or internal splints is a standard and effective procedure to treat minor skeletal fractures. In the case of major skeletal defects caused by extreme trauma, infectious diseases or tumors, the surgical implantation of a bone graft from external sources is required for a complete cure. Practical disadvantages, such as the risk of immune rejection and infection at the implant site, are high in xenografts and allografts. Currently, an autograft from the iliac crest of a patient is considered the “gold standard” method for treating large-scale skeletal defects. However, this method is not an ideal solution due to …

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Developing Sustainable Asphalt Mixtures Using High-Density Polyethylene Plastic Waste Material, Ibrahim Elnaml, Jun Liu, Louay N. Mohammad, Nazimuddin Wasiuddin, Samuel B. Cooper, Samuel B. Cooper Jul 2023

Developing Sustainable Asphalt Mixtures Using High-Density Polyethylene Plastic Waste Material, Ibrahim Elnaml, Jun Liu, Louay N. Mohammad, Nazimuddin Wasiuddin, Samuel B. Cooper, Samuel B. Cooper

Faculty Publications

There is growing interest in sustainable road pavement technologies to protect the environment and provide economic benefits. Post-consumer recycled (PCR) plastics are considered for construction to address the threat of plastic waste materials (PWM) and to improve sustainability. Asphalt pavement construction is highly considered for PWM recycling due to its large daily production. The purpose of this study is to investigate the performance of asphalt mixture containing PWM, specifically high-density polyethylene (HDPE), and compare its performance with two conventional mixtures. Three asphalt mixtures were considered: (1) mixture with asphalt binder PG 76-22 (SBS-modified); (2) mixture with asphalt binder PG 70-22 …

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Measuring Resilience To Sea-Level Rise For Critical Infrastructure Systems: Leveraging Leading Indicators, Lamis Amer, Murat Erkoc, Rusty A. Feagin, Sabarethinam Kameshwar, Katharine J. Mach, Diana Mitsova Jul 2023

Measuring Resilience To Sea-Level Rise For Critical Infrastructure Systems: Leveraging Leading Indicators, Lamis Amer, Murat Erkoc, Rusty A. Feagin, Sabarethinam Kameshwar, Katharine J. Mach, Diana Mitsova

Faculty Publications

There has been a growing interest in research on how to define and build indicators of resilience to address challenges associated with sea-level rise. Most of the proposed methods rely on lagging indicators constructed based on the historical performance of an infrastructure sub-system. These indicators are traditionally utilized to build curves that describe the past response of the sub-system to stressors; these curves are then used to predict the future resilience of the sub-system to hypothesized events. However, there is now a growing concern that this approach cannot provide the best insights for adaptive decision-making across the broader context of …

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Attosecond Charge Migration In Bromoethyne Derivatives, Colin Mcglynn Jul 2023

Attosecond Charge Migration In Bromoethyne Derivatives, Colin Mcglynn

Honors Capstones

No abstract provided.

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Flammability Properties Of The Pyrolysis Gas Generated From Willow Wood, Maria Mitu, Domnina Razus, Dorin Boldor, Cosmin Marculescu Jul 2023

Flammability Properties Of The Pyrolysis Gas Generated From Willow Wood, Maria Mitu, Domnina Razus, Dorin Boldor, Cosmin Marculescu

Faculty Publications

Willow wood presents a real interest for biomass pyrolysis due to its fast growth, renewability, and high energy density. Following the pyrolysis of willow wood in an inert atmosphere, a multi-fuel gaseous mixture was obtained, with the following composition (by volume): 38.20% CO/21.87% H2/17.44% CH4/1.15% O2/17.15% CO2/4.19% N2. The propagation of laminar premixed flames in these multifuel mixtures with air was investigated numerically for initial temperatures from 298 to 500 K, initial pressures from 1 to 20 bar, and fuel equivalence ratios between 0.60 and 2.00. The combustion of these gaseous mixtures as free laminar premixed flames was simulated by …

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Communicating Nature-Society Relationships In Coastal Louisiana: An Evaluation Of The Ecosystem Services Framework, Vanessa Van Heerden Jun 2023

Communicating Nature-Society Relationships In Coastal Louisiana: An Evaluation Of The Ecosystem Services Framework, Vanessa Van Heerden

LSU Doctoral Dissertations

The ecosystem services (ES) framework is a tool to communicate the value of natural environments to human well-being by monetizing services that natural environments provide to humans. The Louisiana Coastal Master Plan uses the ecosystem services provided by the Mississippi River Delta as rationale for why coastal Louisiana should be protected. Here, I am interested in determining how the ecosystem services framework is used to communicate nature-society relationships in coastal Louisiana. I conducted a meta-analysis and spatial analysis to understand the spatial relationships of ecosystem services in the wetlands of coastal Louisiana. I then conducted a survey of residents of …

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Toward One Health: A Spatial Indicator System To Model The Facilitation Of The Spread Of Zoonotic Diseases, Daniel Jato-Espino, Fernando Mayor-Vitoria, Vanessa Moscardó, Fabio Capra-Ribeiro, Leticia Bartolome Del Pino Jun 2023

Toward One Health: A Spatial Indicator System To Model The Facilitation Of The Spread Of Zoonotic Diseases, Daniel Jato-Espino, Fernando Mayor-Vitoria, Vanessa Moscardó, Fabio Capra-Ribeiro, Leticia Bartolome Del Pino

Faculty Publications

Recurrent outbreaks of zoonotic infectious diseases highlight the importance of considering the interconnections between human, animal, and environmental health in disease prevention and control. This has given rise to the concept of One Health, which recognizes the interconnectedness of between human and animal health within their ecosystems. As a contribution to the One Health approach, this study aims to develop an indicator system to model the facilitation of the spread of zoonotic diseases. Initially, a literature review was conducted using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement to identify relevant indicators related to One Health. The …

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