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Full-Text Articles in Entire DC Network
In Good Times & Bad: Measuring Ambivalence In Custodial Grandparents, Marin Gail Olson
In Good Times & Bad: Measuring Ambivalence In Custodial Grandparents, Marin Gail Olson
Theses and Dissertations
Like other forms of caregivers, custodial grandparents experience both the joys and trials of raising their grandchildren. This culmination of positive and negative feelings is called “caregiver ambivalence." It has only recently been studied in relation to caregiver burden and wellness in the form of caregiver ambivalence theory (CAT). By collecting data from approximately 395 custodial grandparents via an online survey, the current study aimed to test if custodial grandparents’ feelings of burden influence their perceived well-being and if feelings of ambivalence mediate this relation. Implications of this research include identifying areas of strength and growth within custodial grandparents and …
The Evaluation Of Traditional And Latency Based Functional Analyses On The Identification Of The Function Of Inappropriate Mealtime Behavior, Mallie N. Donald
The Evaluation Of Traditional And Latency Based Functional Analyses On The Identification Of The Function Of Inappropriate Mealtime Behavior, Mallie N. Donald
Theses and Dissertations
Research indicates that up to 80% of children with developmental disabilities have feeding problems. Feeding problems typically coexist with the presence of inappropriate mealtime behavior which includes behaviors such as aggression, throwing food or utensils, or turning head away from the presented bite. As a result, functional analysis procedures are commonly used to determine the function of inappropriate mealtime behavior to later inform effective function-based interventions. Traditional functional analysis procedures utilize the measurement of the rate of inappropriate mealtime behavior. Several limitations exist within traditional procedures for the assessment of inappropriate mealtime behavior which include demands across all test and …
The Evaluation Of Tetflupyrolimet In Rice (Oryza Sativa), Dalton Ryan Whitt
The Evaluation Of Tetflupyrolimet In Rice (Oryza Sativa), Dalton Ryan Whitt
Theses and Dissertations
The evolution of resistance to many herbicide modes of action (MOA) threatens the utility of synthetic herbicides. Barnyardgrass control in rice has become increasingly difficult due to resistance to common herbicides, and no novel MOA has been introduced in 30 years. FMC Corporation recently discovered tetflupyrolimet (Dodhylex™ active), a Group 28 herbicide that inhibits dihydroorotate dehydrogenase. In 2023 and 2024, studies were conducted at the Delta Research and Extension Center in Stoneville, MS, to evaluate tetflupyrolimet for midsouthern U.S. rice production. The first study evaluated barnyardgrass control and rice tolerance with single and sequential applications of tetflupyrolimet with clomazone and …
Cotton Response To Banded Vs. Broadcast Potassium Fertilizer Rates And Varietal Response Of Peanut To Disease Pressure In A Mid-South Growing Environment, Bryce Dale Bullock
Cotton Response To Banded Vs. Broadcast Potassium Fertilizer Rates And Varietal Response Of Peanut To Disease Pressure In A Mid-South Growing Environment, Bryce Dale Bullock
Theses and Dissertations
Cotton and peanut are commonly grown in rotation for two reasons, cotton requires high fertility, and peanuts are susceptible to diseases which cannot survive on cotton. The objectives of these two studies were to determine if banding K2O closer to the rooting zone of cotton could potentially decrease the amount of potash required to decrease costs, and to determine varietal susceptibility of peanut to early and late leaf spot and southern blight. Application rates of K2O were determined based on soil tests with a full rate being 90 Kg ha-1 and a half rate being 45 Kg ha-1 banded and …
Tabletop Role-Playing Games As A Therapeutic Intervention: Translating Ttrpgs To Therapy, Joanne Adelle Hillerman
Tabletop Role-Playing Games As A Therapeutic Intervention: Translating Ttrpgs To Therapy, Joanne Adelle Hillerman
Theses and Dissertations
The purpose of this study was to examine the aspects of tabletop role-playing games, or TTRPGs, that are appealing to therapists, aspects of TTRPGs that may be challenging for therapists to implement, and to identify outside factors that may associated with therapists’ interest in using TTRPGs. This study used the technology acceptance model (Davis, 1989) as a theoretical framework. A sample of therapists and mental health workers (N = 102) answered survey questions on their perceptions of the ease-of-use and usefulness of TTRPGs in therapy, their likelihood to use TTRPGs in therapy, and additional items measuring outside influences on their …
Transcription Fidelity In The Face Of Oxidative Damage, Eastilan Gyiwah Appiah
Transcription Fidelity In The Face Of Oxidative Damage, Eastilan Gyiwah Appiah
Theses and Dissertations
It is very important that the process of transcription is correctly carried out in the cell for the faithful expression of the genetic code. However, should mistakes happen, they can result in transcription errors which interfere with the protein-making machinery of the cell. This will result in accumulation of proteins and dysfunctional proteins that have the potential of causing diseases like Alzheimer’s. Oxidative damage caused by hydrogen peroxide is known to cause transcription errors in organisms like yeast. It is therefore important to investigate the extent to which hydrogen peroxide can damage cells.
Calibration And Validation Of The Thermal Finite Element Model For Er120s-G Wire Arc Directed Energy Deposition Using Infrared Cameras And Thermocouples, Joshua Mykl Bassett
Calibration And Validation Of The Thermal Finite Element Model For Er120s-G Wire Arc Directed Energy Deposition Using Infrared Cameras And Thermocouples, Joshua Mykl Bassett
Theses and Dissertations
Wire Arc Directed Energy Deposition (WA-DED) is a promising additive manufacturing method for producing large metallic components with high deposition rates and low costs. However, its rapid heat input can lead to residual stress, microstructural changes, and dimensional inaccuracies. Accurate thermal modeling is essential to mitigate these effects. This study presents a thermal calibration of a finite element model (FEM) for ER120S-G using thermocouples and infrared (IR) imaging. Thermal data were gathered from three experiments to complete the calibration of the FEM . Calibration focused on tuning the Goldak heat source parameters, power efficiency, and heat transfer coefficients to minimize …
Influence Of Diverse Forage Environments On Honey Bee Colony Health, Angus Catchot Iii
Influence Of Diverse Forage Environments On Honey Bee Colony Health, Angus Catchot Iii
Theses and Dissertations
Honey bees are important pollinators that face a multitude of stressors in their environment such as pathogens, parasite pressure, forage availability and pesticide exposure. This study examined how the makeup of different environments and the stressors related to those environments are affecting honey bee health in Mississippi. A field experiment was conducted during the first year of the study across four distinct landscapes ranging from intensively cultivated cropland to predominantly natural forage habitats to assess the impact of landscape availability on varying honey bee colony health parameters. Locations that had cultivated crops within foraging range produced more honey and brood …
Winter Waterfowl Forage Production In Managed Coastal Wetlands Of The South Atlantic Region: Improving Inputs For Bioenergetics Modeling Used In Regional Conservation Planning, Stephen Andrew Clements
Winter Waterfowl Forage Production In Managed Coastal Wetlands Of The South Atlantic Region: Improving Inputs For Bioenergetics Modeling Used In Regional Conservation Planning, Stephen Andrew Clements
Theses and Dissertations
Under the assumption that food is limiting to non-breeding waterfowl, Migratory Bird Joint Ventures frequently use daily-ration bioenergetics models to inform wetland conservation objectives. Two essential components of these models include estimates of energy supply (i.e., energetic density) of wetlands used by waterfowl and accurate spatial data layers to determine wetland area. Managed impoundments are important wetland resources for migrating and wintering waterfowl in the South Atlantic Region. However, there is little understanding of the energetic density available to waterfowl in these wetlands regionally, and until recently, a database of digitized impoundments was unavailable for developing a spatial data layer. …
Social Validity Of Functional Analysis Variations, Rita M. Druffner
Social Validity Of Functional Analysis Variations, Rita M. Druffner
Theses and Dissertations
The functional analysis was developed to systematically identify the antecedent and consequent conditions mediating challenging behavior. Modifications to the traditional procedures have been developed to address barriers to implementation, including duration, environmental control, and safety. Much of the research surrounding functional analyses addresses effectiveness, barriers to implementation, and practitioner acceptability. However, there is a lack of research assessing caregiver social validity of functional analysis procedures. Social validity is the assessment of the goals, procedures, and outcomes of behavior analytic practice. Even though there has been advocacy for including measures of social within behavior analytic research and practice, there is limited …
Understanding How Nws Meteorologists Tailor Hazardous Weather Messaging To Core Partners And Identify Local Vulnerabilities, Allison Camille Harvey
Understanding How Nws Meteorologists Tailor Hazardous Weather Messaging To Core Partners And Identify Local Vulnerabilities, Allison Camille Harvey
Theses and Dissertations
Over the past few decades, the National Weather Service (NWS) has continued to improve impact-based decision support services (IDSS) efforts to strengthen communication with core partners. This study addressed how a new spatially hazard-specific vulnerability tool called the Brief Vulnerability Overview Tool (BVOT) may impact how NWS meteorologists tailor messaging to their core partners. It was found that relationship building between NWS meteorologists and core partners is key to enhancing trust, especially during blue sky days. This was done by learning core partners’ needs, thresholds, and communication styles when presenting weather information. Core partners also noticed cues from NWS meteorologists …
Strategic Use Of Exogenous Feed Enzymes And Sodium Bisulfate To Optimize Broiler Production, Spencer Thomas Karn
Strategic Use Of Exogenous Feed Enzymes And Sodium Bisulfate To Optimize Broiler Production, Spencer Thomas Karn
Theses and Dissertations
Poultry producers must continually evaluate nutritional strategies to enhance broiler performance and sustainability. Chapter II assessed sodium bisulfate (SB) applied to litter, feed, and water across a 42-day grow-out. Applying SB to litter reduced pH, while 0.3% and 0.4% dietary SB improved feed conversion ratio (FCR). Water acidification with SB during the final week did not impair performance, supporting its use as a preharvest intervention. Chapter III evaluated phytase at 500, 1500, and 2000 FTU/kg, with or without protease, in reduced amino acid diets over 56 days. Birds fed a nutrient-adequate diet with 1500 FTU/kg phytase outperformed all reduced-amino acid …
Older Adult Men’S Well-Being: The Impact Of Masculinity And Negative Perceptions Of Aging, Darby D. Mackenstadt
Older Adult Men’S Well-Being: The Impact Of Masculinity And Negative Perceptions Of Aging, Darby D. Mackenstadt
Theses and Dissertations
Stereotype embodiment theory states that individuals who hold negative aging stereotypes may internalize them, and thus view their own aging process as negative. This study aimed to evaluate how older adult men may be influenced by their adherence to masculinity standards, such as men are expected to be strong and independent, in older adulthood. A sample of 438 men aged 55 and older living in the southern United States was analyzed, finding that beliefs of masculinity moderated the relationship between negative perceptions of aging and depression. Participants who reported a high adherence to masculinity beliefs and a negative perception of …
Transforming Movement Assessment In Physical Therapy Through Subaquatic Data Collection, Kaitlyn Mcdonald
Transforming Movement Assessment In Physical Therapy Through Subaquatic Data Collection, Kaitlyn Mcdonald
Theses and Dissertations
This study explored the interest and perceived barriers to integrating subaquatic diagnostic technologies (SDTs) into hydrotherapy among licensed physical therapists. Seventeen semi-structured interviews were conducted using a mixed-methods design, with 15 interviews included in the final analysis. Quantitative data were analyzed using chi-square tests, while qualitative responses were coded thematically. Results indicated no statistically significant relationships between SDT interest and career stage or hydrotherapy access, though qualitative data highlighted concerns about cost, limited access, and usability. Despite mixed interest in adoption, participants identified several potential benefits of SDTs, including improved treatment tailoring, increased patient buy-in, and enhanced outcome monitoring. Functional …
My Grandparents Raised Me: The Role Of Formative Individual And Family Experiences In Predicting Emerging Adult Substance Use, Attachment, And Mental Health Outcomes, Acacia Lopez
Theses and Dissertations
Individuals raised in a grandfamily, or family structure in which a grandparent raises their grandchildren, experience higher rates of adverse childhood experiences (ACEs), insecure attachment, and negative mental health outcomes during childhood. Literature on outcomes of these individuals across the lifespan is extremely limited, however, and it is unclear how formative individual and family experiences of being raised by grandparents carry into emerging adulthood (e.g., 18 to 25-years-old). Emerging adulthood is a developmental stage marked by significant instability and unpredictability that is linked with increased vulnerability to mental health concerns and substance use. It has been identified as an important …
Decision-Making And Execution Skill Estimation In Continuous Action Space Domains, Delma I. Nieves-Rivera
Decision-Making And Execution Skill Estimation In Continuous Action Space Domains, Delma I. Nieves-Rivera
Theses and Dissertations
In many real-world domains with continuous action spaces, an agent’s performance is driven by two key factors: its decision-making skill, or ability to select high-quality actions, and its execution skill, or precision in carrying out these actions. However, accurately evaluating these skills, particularly when direct information about the agent’s intentions is unavailable, remains a challenging problem. This research addresses this need by developing a theoretical framework and proposing novel estimation methods to assess both decision-making and execution skills based solely on observable data: executed actions and their associated rewards. The work consists of six core studies focused on developing and …
A Mathematical Theory Of Epitaxial Growth, Brock C. Price
A Mathematical Theory Of Epitaxial Growth, Brock C. Price
Theses and Dissertations
In this dissertation we investigate several PDE models of Epitaxial growth. These models are fourth-order PDE’s featuring exponential nonlinearities as well the p-Laplacian and 1-Laplacian. The presence of the exponential nonlinearity is what provides the main mathematical difficulty. Theexponent in particular does not have enough estimates to guarantee any compactness. Because of this, one has to allow the inclusion of a singular portion to the exponent in the sense of the Lebesgue decomposition theorem. In thefirst chapter weinvestigate a related epitaxial growth, with transition rates of the Metropo lis variety and a linear exponent. The metropolis rates induce an extra …
Impact Of Overseeding Cover Crops On Dryland Soybeans In Mississippi Delta, Michael C. Pruden
Impact Of Overseeding Cover Crops On Dryland Soybeans In Mississippi Delta, Michael C. Pruden
Theses and Dissertations
In the Mississippi Delta, continuous dryland soybean (Glycine max L.) production practice is a selection for those that do not or cannot irrigate their crops. However, no crop rotation results in yield losses due to diseases, increased insect population, weed species pressure, nutrient leaching, and soil erosion. Incorporation of cover crops might offer potential benefits but needs further investigation. The objectives were to determine the optimum cover crop planting time (R6 and harvest) and ideal cover crop species, and evaluate their impact on dryland soybean grain yield, quality, and plant population. R6 overseeded cereal rye (Secale cereale L.) produced the …
Microbiomics Of Amazonian Fishes And Associations With Human Pathogens (Mycobacterium Ulcerans), Matthew Edwin Scott
Microbiomics Of Amazonian Fishes And Associations With Human Pathogens (Mycobacterium Ulcerans), Matthew Edwin Scott
Theses and Dissertations
The Amazon Rainforest and Guiana Shield are recognized as two of the most biodiverse ecosystems on Earth, particularly when considering macroorganisms. Relatively little attention has been paid to the microbiological diversity within rainforest ecosystems, or to the interactions among macro- and microbiological communities. To this end, I characterized the effects of habitat and host phylogenic parameters on the gut microbiome of freshwater fishes along the coast and within the Approuague River watershed in French Guiana. The results indicate a river continuum effect on the microbial composition of fishes, as well as a similar continuum pattern along the coast of French …
Detection, Occupancy, And Abundance Of Vultures In Mississippi, Jonathan Smith
Detection, Occupancy, And Abundance Of Vultures In Mississippi, Jonathan Smith
Theses and Dissertations
The purpose of this study was to examine influences of tree cover, light pollution, average ambient air temperature, and roadkill abundance on Black Vulture (Coragyps atratus) and Turkey Vulture (Cathartes aura) detection, occupancy, and abundance within Mississippi. Data was collected via road surveys. Highways were selected as transects of 290 m in length to survey for vultures and roadkill. The locations of detected vultures were GPS marked. To evaluate relationships of vulture detection, occupancy, and abundance with the covariates, I used dynamic occupancy models and open binomial N-mixture models. Average ambient air temperature had a positive relationship with Black Vulture …
Mastering Skills Together: Effects Of Video Modeling On Parent-Implemented Academic Intervention, Chelsea S. Thorpe
Mastering Skills Together: Effects Of Video Modeling On Parent-Implemented Academic Intervention, Chelsea S. Thorpe
Theses and Dissertations
Reading proficiency is a fundamental skill for academic success and long-term developmental outcomes. Yet, despite ongoing efforts to strengthen literacy education, a significant number of students continue to face reading difficulties that hinder comprehension, critical thinking, and overall academic achievement. National data demonstrate the urgency of this issue. The 2024 National Assessment of Educational Progress (NAEP) reported that 40% of fourth-grade students and 33% of eighth-grade students scored below the Basic level in reading, marking the highest rate on record for eighth graders. Early reading challenges can often lead to other academic and psychosocial challenges such as low achievement, low …
Thermo-Mechanical Advancements For Very High Strength And Ultra High Performance Concretes, Lana Grayson Brown Sisung
Thermo-Mechanical Advancements For Very High Strength And Ultra High Performance Concretes, Lana Grayson Brown Sisung
Theses and Dissertations
Interest in the use of high-strength concrete (HSC) has increased in recent years with demand for improved concrete performance. HSCs are widely associated with high heat of hydration and elusive behavior when exposed to high temperatures commonly occurring in mass structures. The optimization of HSC mixture proportioning is difficult due to a wide variety of constituents that influence thermal and mechanical properties. Additionally, determining in-place properties of mass concrete placements is elusive, and there are currently minimal to no test methods available that are both predictive and a direct measurement of mechanical properties. The objective of this dissertation is to …
Academics Vs Athletics: Prioritizing The Students In Student-Athletes And The Importance Of Their Return To The Classroom, Stephen Walker
Academics Vs Athletics: Prioritizing The Students In Student-Athletes And The Importance Of Their Return To The Classroom, Stephen Walker
Theses and Dissertations
The Mississippi High School Activities Association (MHSAA) aims to enhance student- athletes' educational experiences but Law 6.5.1 inadvertently causes students to miss 300 hours of academic instruction annually. This dilemma forces school districts to choose between robust sports programs and rigorous academic schedules, ultimately creating a disadvantage for students. While participation in sports has been linked to improved academic performance, the current structure disproportionately allocates resources to athletics over academics, with only 51% of schools offering after-school academic programs compared to 77% for sports. This paper discusses the benefits of sports, including higher attendance and graduation rates, but also highlights …
The Effect Of Wall Temperature And Transpiration On Görtler Vortices In High-Speed Boundary Layers, Asmaa Ahaggach
The Effect Of Wall Temperature And Transpiration On Görtler Vortices In High-Speed Boundary Layers, Asmaa Ahaggach
Theses and Dissertations
Görtler vortices are counterrotating flow structures generated as a result of the imbalance between the wall radial pressure gradients and the centrifugal forces in a boundary layer developing on a curved surface. Their presence leads to secondary instabilities and increases the wall shear stress as they accelerate the transition from laminar to turbulent flow. These secondary instabilities can be mitigated using control techniques aimed at decreasing the energy and the wall shear stress. In this thesis, the combined effect of wall temperature and transpiration on Görtler vortices developing in supersonic and hypersonic boundary layers is investigated. Görtler vortices are excited …
Load Balancing For Stream Processing In Edge Computing, Faiza Akram
Load Balancing For Stream Processing In Edge Computing, Faiza Akram
Theses and Dissertations
Unlike cloud-based systems, where resources are centralized for data processing and located at a distance from the source, leading to an increase in the response time, edge computing emerges as a transformative paradigm that processes the data closer to the sources to meet the application’s service requirements. Since the resources in edge computing are distributed and limited, load balancing is crucial. To ensure the prevention of bottlenecks and failures in resource-constrained environments, load balancing is an important aspect of edge computing as it optimizes resource utilization while maintaining the requirements of low-latency applications, improved fault tolerance, energy efficiency, adaptability, scalability, …
Streamlined Technology Systems: Optimizing Technology Systems For Meridian Public School District, Latoya Atterberry
Streamlined Technology Systems: Optimizing Technology Systems For Meridian Public School District, Latoya Atterberry
Theses and Dissertations
Technology has become a cornerstone of modern education, reshaping how teachers instruct and students learn. "Technology plays a pivotal role in shaping modern learning environments, offering opportunities for enhanced engagement and personalized learning experiences" (Ascione, 2023). This project focuses on the critical role of effective professional development in equipping teachers to integrate technology into their instructional practices meaningfully. Drawing on the TPACK (Technological Pedagogical Content Knowledge) and SAMR (Substitution, Augmentation, Modification, Redefinition) frameworks, this project examines how tailored professional development programs can bridge gaps in teachers’ technological and pedagogical knowledge, guiding them toward transformative technology use. This project culminates in …
Developing Site-Specific Water Response Functions Using Historical Soil Moisture Data, Gifty Lad Ayela
Developing Site-Specific Water Response Functions Using Historical Soil Moisture Data, Gifty Lad Ayela
Theses and Dissertations
Variable rate irrigation (VRI) systems offer a promising solution by optimizing water application based on site-specific needs in different areas within a crop field. While accurate crop water production functions (CWPFs) are essential for VRI systems, developing CWPFs has been hindered by challenges in data collection and the complexities of modeling water’s impact on yields. This study attempts to develop site-specific CWPFs using farmers’ historical soil moisture data, collected using soil water tension (SWT) as a proxy, and yield maps. The spatial variability of the crop-water response functions was modeled using Geographically Weighted Regression (GWR) and the results from this …
Determining The Toxic Threshold And Other Use Characteristics For Industrial Hemp Seed Oil Used For Wood Product Protection, Daylan M. Barnes
Determining The Toxic Threshold And Other Use Characteristics For Industrial Hemp Seed Oil Used For Wood Product Protection, Daylan M. Barnes
Theses and Dissertations
Plant-based wood treatments have been utilized for many years, with varying success. Oils such as those extracted from linseed (flax), tung, and hemp plants have been used for thousands of years as finishes on wood. These are all drying oils, which dry to a film when exposed to air. Hemp seed oil has a high fatty acid content and can take a long time to dry on wood products but is valued in woodworking for being easy to use, food-safe, and having little to no odor. In this study, cold-pressed hemp seed oil, blended with a soybean carrier oil, is …
Integrated Analysis Of Untargeted Liver, Serum Metabolome And Gut Microbiome Following Selenium Deficiency Diet In Selenoh Knockout And Wildtype Mice, Richard Eugene Baird
Integrated Analysis Of Untargeted Liver, Serum Metabolome And Gut Microbiome Following Selenium Deficiency Diet In Selenoh Knockout And Wildtype Mice, Richard Eugene Baird
Theses and Dissertations
Selenoprotein H (SELENOH) is an oxidoreductase located in the nucleolus, and its biochemical levels decrease with selenium (Se) deficiency, as reported in mammalian research. This current investigation aimed to understand the impact of nutritional Se deficiency on gut microbial composition and metabolomic profiles. The Firmicutes/Bacteroidota (F/B) ratio, linked to various health conditions, was balanced for wildtype (WT) mice (1.06). In contrast, selenoh knockout (KO) mice associated with dietary Se deprivation had a significantly (p < 0.002) lower ratio (0.56), suggesting dysbiosis. It is believed that SELENOH levels decreased due to the Se deficient diet, and the selenoh KO mice exhibited alterations in microbial community composition and metabolite profiles, as supported by correlative analyses. With respect to the bacterial communities, significant differences between diets occurred for three taxa, including Akkemansia mucinphila, Bacteroides caecimuris, and Parabacteroides goldsteinii. Candida tropicalis, Malassezia restricta, and Cyberlindnera jadinii were three abundant fungal yeasts. Only Cyberlindnera jadinii exhibited significantly greater relative abundance between genotypes and was more abundant in the selenoh KO versus WT mice. Correlation analyses between bacterial and fungal taxa revealed both positive and negative relationships, but no specific trends were observed. The liver and serum metabolomic data contained similar amino acids, lipids, proteins, and carbohydrates. Using NMR spectroscopy, 112 liver metabolites were detected, while GC-TOF-MS analysis of the serum revealed the presence of 172, comprising both polar and nonpolar compounds. The metabolite levels varied significantly when analyzed using multivariate models such as PCA and PLS-DA (VIP scores), particularly for glucose, taurine, lactate, and UDP-glucose, which are associated with energy production and cellular health. Overall, the Se deficient diet had the most significant impact on the microbial community structure and the concentration of key metabolites within liver tissues and serum. Correlation analyses conducted across studies revealed significant linear relationships between metabolites and the microbiome. However, these differences were associated with bacterial and fungal taxa containing low relative abundances. Based on these findings, further investigation into the impact of SELENOH homeostasis on microbial and metabolite profiles should be conducted using selenoh KO mice under various nutritional Se dietary levels.
Fungal Resistance Of Citric Acid Crosslinked Chitosan Treated Wood, Samuel Jacob Barton
Fungal Resistance Of Citric Acid Crosslinked Chitosan Treated Wood, Samuel Jacob Barton
Theses and Dissertations
Chitosan (CH), a linear polysaccharide biopolymer derived from chitin, is known for its antimicrobial and antifungal properties. However, its natural hydrophilicity limits its application as a wood preservative. This study explores the crosslinking of chitosan with citric acid (CA) to improve its stability and hydrophobicity, aiming to enhance its efficacy as a wood preservative. The study investigates fungal resistance against Gloeophyllum trabeum (brown-rot) and Trametes versicolor (white-rot) fungi using the AWPA E-10 soil block test for pine and gum samples vacuum-treated and dip-treated with CH-CA concentrations (CH 6%/CA 3%, CH 4%/CA 3%, CH 2%/CA 3%, and CH 1.5%/CA 3%). The …