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Articles 8581 - 8610 of 15058
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Outcomes Of An Emotion Word Intervention For Children With Social Communication Impairments, Rebecca Cloward Mansfield
Outcomes Of An Emotion Word Intervention For Children With Social Communication Impairments, Rebecca Cloward Mansfield
Theses and Dissertations
Children with social communication disorders have been found to exhibit deficits in emotional intelligence, including the ability to identify emotions attributed to facial expressions. The purpose of this thesis was to examine the efficacy of a social communication intervention program designed to increase the accuracy of emotion based word use in three elementary school-aged participants with social communication disorders. The participants took part in a multiple-baseline, 20-session treatment including story enactment, journaling procedures, and supplementary activities. The story enactment portion of the intervention centered on Mercer Mayer's A Boy, A Dog, and A Frog (1967) wordless picture book series. Participants' …
Post-Fire Interactions Between Soil Water Repellency, Islands Of Fertility, And Bromus Tectorum Invasibility, Kaitlynn Jane Fernelius
Post-Fire Interactions Between Soil Water Repellency, Islands Of Fertility, And Bromus Tectorum Invasibility, Kaitlynn Jane Fernelius
Theses and Dissertations
An intrinsic link exists between soil moisture and soil nitrogen. Factors that increase or decrease soil moisture can have a profound effect on soil nitrogen cycling, which may have later repercussions in the plant community. Post-fire soil water repellency is one factor that can limit soil moisture acquisition and may indirectly affect nitrogen cycling and weed invasion in woody islands of fertility. Plots centered on burned Juniperus osteosperma trees were either left untreated or treated with a surfactant to ameliorate water repellency. Two years later, soils were excavated from the untreated and treated field plots. In the greenhouse, half of …
Tattoo Stigma And Job Discrimination, Phil Drazewski
Tattoo Stigma And Job Discrimination, Phil Drazewski
Theses and Dissertations
Recent research (Madera & Hebl, 2011) has found that visible stigmas can lead to discrimination against stigmatized individuals in the form of lower job applicant ratings. Tattooed individuals may be one group that faces such discrimination. People with tattoos are perceived less positively than non-tattooed people (Martin & Dula, 2010; Resenhoeft, Villa, & Wiseman, 2008), which may be the result of a tattoo stigma. Pryor & Reeder (2011) suggested that one hallmark of stigmas is that they evoke implicit negative attitudes. In a pilot study, participants implicitly and explicitly evaluated tattooed and non-tattooed individuals, and a tattoo stigma was supported. …
Synthesis, Structural Variations And Trends In The Properties Of Unique Dinuclear And Polynuclear Complexes Of Bis(Pyrazolyl)Methane Ligands In Solid State And Solution, Andrea Eva Pascui
Synthesis, Structural Variations And Trends In The Properties Of Unique Dinuclear And Polynuclear Complexes Of Bis(Pyrazolyl)Methane Ligands In Solid State And Solution, Andrea Eva Pascui
Theses and Dissertations
The semi-rigid ligands, p-[CH(pz)2]2C6H4, Lp, m-[CH(pz)2]2C6H2, Lm, and m-[CH(3,5-Me2pz)2]2C6H4, Lm* (pz = pyrazolyl ring), link two bis(pyrazolyl)methane units into a single molecule by a rigid phenylene spacer and are used to study the structural variations and magnetic interactions in self-assembled first row, divalent transition metal complexes in polymeric, dinuclear and dinuclear metallacyclic settings. The formation of these architectures highly depend on the geometry of these ligands: anti, the …
Environmental Regulation Of Tidal Wetland Microbial Communities And Associated Biogeochemistry, Ember Morrissey
Environmental Regulation Of Tidal Wetland Microbial Communities And Associated Biogeochemistry, Ember Morrissey
Theses and Dissertations
Microbial communities play an essential role in carrying out the biogeochemical cycles that sustain life on Earth, yet we know very little about their ecology. One question of particular interest is how environmental conditions shape microbial community structure (i.e., the types of organisms found in the community and their relative abundance), and whether such changes in structure are related to biogeochemical function. It is the aim of this dissertation to address this question via the examination of carbon (C) and nitrogen (N) cycling in wetland ecosystems, which due to their diverse hydrology have a profound influence on biogeochemical cycles. With …
Civitas: A Game-Based Approach To Ap Art History, Anna Davis
Civitas: A Game-Based Approach To Ap Art History, Anna Davis
Theses and Dissertations
To increase student engagement as well as cover the content of Ancient Rome, the author developed a game named Civitas for an AP Art History course. The question driving this research project was, "Will incorporating a game into this Ancient Rome unit increase engagement without sacrificing the academic integrity of the class?" Research about engagement as well as others' success incorporating games into the classroom was examined to determine the benefits and difficulties. Much of the work for this unit came before any teaching occurred: designing all aspects of the game as well as carefully determining how it would contribute …
Spatial Analysis Of Air Velocity Distribution As Affected By House Size And Design In Commercial Broiler Production Facilities, Brian David Luck
Spatial Analysis Of Air Velocity Distribution As Affected By House Size And Design In Commercial Broiler Production Facilities, Brian David Luck
Theses and Dissertations
Tunnel ventilation is the design practice of placing exhaust fans and air inlets on opposite ends of animal production facilities and moving air through the building via negative pressure. Increasing air velocity within tunnel ventilated broiler production facilities increases sensible cooling and reduces the need for latent cooling (panting), which improves production efficiency. An air velocity measurement system was developed and measurement density analysis for quantifying air velocity distribution was performed in a 12.19 x 121.9 m commercial broiler production facility. Results showed that axial measurement distances of 3.05 m and 40 measurement points per cross-section produced the most descriptive …
Xylo-Oligosaccharides Production From Corn Fiber And In-Vitro Evaluation For Prebiotic Effect, Aditya Samala
Xylo-Oligosaccharides Production From Corn Fiber And In-Vitro Evaluation For Prebiotic Effect, Aditya Samala
Theses and Dissertations
Xylooligosaccharides (XOS) are considered to be prebiotics. Prebiotics are defined as non-digestible food ingredients that benefit the host by stimulating the growth and activity of a limited number of bacteria, such as the Bifidobacterium genus, in the colon. Corn fiber separated from distillers dried grains with solubles (DDGS) could be a valuable feedstock for XOS production. The objective of the first chapter was to determine the efficacy for autohydrolysis to produce XOS using fiber separated from DDGS. Fiber was treated with deionized water in a Parr-reactor, at temperatures ranging from 140 to 220 °C to produce XOS. The maximum total …
A Framework For Identifying Appropriate Sub-Regions For Ecosystem-Based Management In Northern Gulf Of Mexico Coastal And Marine Environments, Jennifer Sloan Ziegler
A Framework For Identifying Appropriate Sub-Regions For Ecosystem-Based Management In Northern Gulf Of Mexico Coastal And Marine Environments, Jennifer Sloan Ziegler
Theses and Dissertations
Nearly half of the population of the United States lives in coastal regions, and millions of visitors from across the nation and world enjoy the coasts every year. Coastal and marine areas provide for recreation, economic activities essential for the financial health of the nation, and vital ecological services. As they provide so many benefits to the U.S., it is vital to protect and preserve the coastal and ocean areas from the increasing, competing demands they are facing. In order to protect and preserve these complex systems, a comprehensive approach incorporating science, engineering, humanities, and social sciences should be taken; …
Analysis Of Morphology And Fauna Of Geometrinae (Lepidoptera: Geometridae) Of The Caribbean Region, David M. Plotkin
Analysis Of Morphology And Fauna Of Geometrinae (Lepidoptera: Geometridae) Of The Caribbean Region, David M. Plotkin
Theses and Dissertations
The Geometrinae, commonly known as emerald moths, are a diverse group of Lepidoptera with over 450 Neotropical species. However, Caribbean Geometrinae have received relatively little attention compared to the Geometrinae of mainland Central and South America. Using the method of Lee and Brown (2006), whole body mounts of descaled specimens of both Caribbean and mainland Neotropical Geometrinae were prepared. Morphological variation of exo- and endoskeletal characters among species, genera, and tribes of Neotropical Geometrinae is described. A faunistic study of Caribbean Geometrinae was also conducted using material from museums and private collections. The study includes definitions of species of Caribbean …
Developing A Multistage Model For Treponemal Disease Susceptibility, Sarah A (Sarah Ann) Mathena
Developing A Multistage Model For Treponemal Disease Susceptibility, Sarah A (Sarah Ann) Mathena
Theses and Dissertations
Despite numerous studies, little is known about the influential factors impacting treponemal disease susceptibility. Yet, forms of treponemal disease, specifically yaws, are a major source of morbidity in the developing world. Bioarchaeological materials may assist with deficit by testing full ranges of disease expression. This study explores the relationship between treponemal disease ecology, specifically yaws, and susceptibility through six southeastern United States archaeological samples. Results show early life health experiences have a relationship to later life disease expression. However, influences of climate may only be seen at a cross-regional level. Finally, although nutrition, as evidenced by subsistence strategy, may play …
The Unwanted Horse Population: A Survey, Shannon Alina Lindsey
The Unwanted Horse Population: A Survey, Shannon Alina Lindsey
Theses and Dissertations
Unwanted horses are a growing problem in the United States, and through the use of surveys, researchers can understand public opinion and experiences related to this problem. This study administered surveys specific to horse and non-horse owners through face-toace delivery and to rescue/retirement and auction facilities through the mail. Data was analyzed using a CRD, GLM and Fisher’s Protected LSD with á of 0.05. Comparisons were completed between horse and non-horse owners, horse owners and non-horse owners with equine experience, non-horse owners with and without equine experience, Quarter horse and other breeds owners, and auction and rescue/retirement facilities. Similarities were …
Temperature Effects Of Dielectric Properties And Their Impact On Medical Device Development, Erin Elizabeth Colebeck
Temperature Effects Of Dielectric Properties And Their Impact On Medical Device Development, Erin Elizabeth Colebeck
Theses and Dissertations
Dielectric properties play an influential role in the development of medical devices. Understanding the behavior of these properties and how they respond to external stimuli, such as heat, over an extended frequency has yet to be researched. The focus of this study is to examine the impact of temperature on dielectric properties from 500 MHz to 10 GHz in order to better match the antenna properties of medical applications to the dielectric properties of biological tissue in question; more specifically, microwave ablation, microwave hyperthermia, and thermal modeling of brown adipose tissue’s metabolic processes. The dielectric properties of biological tissue samples …
Meta-Heuristic Optimization Of Antennas For Biomedical Applications, Aaron Zachary Hood
Meta-Heuristic Optimization Of Antennas For Biomedical Applications, Aaron Zachary Hood
Theses and Dissertations
Given the proper conditions, antennas applied in medicine can offer improved quality of life to patients. However the human body proves hostile to typical, analytical antenna design techniques as it is composed entirely of frequency- and temperature-dependent lossy media. By combining optimization techniques with numerical methods, many of these challenges may be overcome. Particle swarm optimization (PSO) models the solution process after the natural movement of groups such as swarms of bees as they search for food sources. This meta-heuristic procedure has proven adept at overcoming many challenging problems in the electromagnetics literature. Therefore, this dissertation explores PSO and some …
The Effects Of Low Atmospheric Pressure And Electrical Stunning On The Instrumental And Sensory Quality Of Broiler Breast Meat Deboned At 45 Minutes And 4 Hours Postmortem, Vijayakumar Radhakrishnan
The Effects Of Low Atmospheric Pressure And Electrical Stunning On The Instrumental And Sensory Quality Of Broiler Breast Meat Deboned At 45 Minutes And 4 Hours Postmortem, Vijayakumar Radhakrishnan
Theses and Dissertations
Low Atmospheric Pressure Stunning (LAPS) has recently become available to the broiler industry. Therefore, research was conducted to determine the effect of stunning method (LAPS and Electrical Stunning(ES)) and postmortem deboning time (0.75 hr and 4 hr) on the instrumental and sensory acceptability (3 replications) of breast meat (n=576, 144 birds per treatment) prepared using different cooking methods (fried, baked, sous vide). Breast meat was evaluated for pH, CIE L*a*b*, yields, shear force, and consumer acceptability. Postmortem pH decline was more rapid (P<0.05) in the breast meat of LAPS stunned birds when compared to ES stunned birds, but no differences existed (P>0.05) among treatments with respect to final pH. On average, no differences (P > 0.05) existed in the …
Characterization Of A Novel Ring-Type Ubiquitin E3 Ligase Ghring2 Involved In Cotton Fiber Development, Shiva Theja Reddy Soma
Characterization Of A Novel Ring-Type Ubiquitin E3 Ligase Ghring2 Involved In Cotton Fiber Development, Shiva Theja Reddy Soma
Theses and Dissertations
The ubiquitin-proteasome proteolysis pathway is responsible for the degradation of abnormal and short-lived proteins to regulate many important biochemical activities in eukaryotes. By employing affymetrix microarray analysis, we have identified a novel ubiquitin ligase E3 gene GhRING2 that is expressed differentially between two G. hirsutum lines - Texas Marker-1 and Chromosome Substitution Line CS-B25. The complete GhRING2 gene sequence was obtained by genomic and cDNA walking. The expression of GhRING2 in cotton fiber is developmentally regulated, suggesting that the ubiquitin-proteasome pathway may regulate cotton fiber growth and development. Using a yeast two-hybrid assay GhRING2 was found to interact with a …
Urban Flow-Through Facilities' Media Compositions For Stormwater Quality And Quantity Improvements, Emily Gwynne Overbey
Urban Flow-Through Facilities' Media Compositions For Stormwater Quality And Quantity Improvements, Emily Gwynne Overbey
Theses and Dissertations
Urban stormwater management is evolving toward sustainable approaches which rely on dispersed small-scale bioretention BMPs. One such BMP is the flow-through planter, commonly applied in areas where infiltration into in situ soil is restricted or not possible. A project was developed to evaluate 18, vertically scaled flow-through mesocosms. Three replicates of six treatments, including four soil mixtures containing varied percentages of sand, compost and topsoil, were tested for orthophosphate and nitrate removal, volume reduction capabilities, and peak flow attenuation through the application of a synthetic solution over a simulated 2-inch, Type II storm event. Runoff volume was significantly (p < 0.05) reduced compared to controls. Nutrient levels observed along the hydrograph at different time-steps and flow rates revealed patterns not apparent in cumulative results. The observation of preferential flow patterns along with variability in nutrient removal across treatments highlights the need for design modifications of flow-through facilities.
Molecular Basis Of Salmonella Enterica Serovar Kentucky Attachment To Broiler Skin, Sanaz Salehi
Molecular Basis Of Salmonella Enterica Serovar Kentucky Attachment To Broiler Skin, Sanaz Salehi
Theses and Dissertations
The presence of Salmonella enterica throughout the production and processing continuum is a concern in broiler industry. While federal regulations have lowered the acceptable level of Salmonella contamination on broiler carcasses, the mechanisms that contribute to pathogen attachment are not fully understood. Salmonella Kentucky has become the predominant Salmonella serovar isolated from broilers carcasses at the end of the immersion chill tank. In Europe and Africa this serovar has been shown to acquire antibiotic resistance genes that may lead this non-typhoidal serotype to become a potential public health concern. To investigate the genes that are involved in colonization of the …
Monitoring Gulf Coast Fish Quality, Karl Edward Bell
Monitoring Gulf Coast Fish Quality, Karl Edward Bell
Theses and Dissertations
Globalization and the rise of fish importation has led to an increase in mislabeling. To combat this problem, analytical and molecular methods have been employed. First, nitrofuran metabolites were extracted, hydrolyzed, and derivatized in channel catfish, swai, and tilapia. Utilizing high performance liquid chromatography coupled with triple quadrupole mass spectrometry, derivatized metabolites were detected at levels of 1 ng/mL with coefficients of determination greater than 0.998. Recoveries greater than 90% and relative standard deviation less than 17% indicate that the method is successful. Secondly, chip based electrophoresis coupled with restriction fragment length polymorphism was used for the species differentiation. By …
Examining The Influence Of Nutritional Behaviors, Knowledge And Attitudes On Body Mass Index Of Adults In North Mississippi, Gloria Therese Broughan
Examining The Influence Of Nutritional Behaviors, Knowledge And Attitudes On Body Mass Index Of Adults In North Mississippi, Gloria Therese Broughan
Theses and Dissertations
Individuals with weight statuses approaching obesity may be at risk for chronic health problems. Diet, weight, health behaviors, level of knowledge, and attitudes or perceptions have been identified as key factors influencing body weight. The purpose of this study was to determine which factors were related to BMI in adults in north Mississippi and to determine if there were relationships between those factors. A telephone survey was conducted with 500 participants (mean age 46.3 ± 18.5). The average BMI was 27.5 ± 6.2 kg/m2. Knowledge and attitude/perception-based data were associated with a higher BMI in the population more than dietary …
Bioluminescence Imaging Of Transgene Expression In Intact Porcine Ovarian Follicles In Vitro, Song-Yi Jung
Bioluminescence Imaging Of Transgene Expression In Intact Porcine Ovarian Follicles In Vitro, Song-Yi Jung
Theses and Dissertations
The porcine antral follicle, which consists of an oocyte and surrounding follicular components, including theca, granulosa, and cumulus cells and follicular fluid, is an essential microenvironment for oocyte development and maturation. Investigating cellular and molecular events in the context of the whole follicle will aid in our understanding of interactions between the oocyte and the follicular components. The objective of this dissertation was to develop a novel bioluminescent imaging model to visualize and measure cellular and molecular events in living intact ovarian follicles in vitro. Bioluminescence imaging was employed to facilitate noninvasive, dynamic, and real-time transgene analysis in living intact …
Characterization And Monitoring Of On-Farm Water Storage Systems In Porter Bayou Watershed, Mississippi, Richard Ludwig Kirmeyer
Characterization And Monitoring Of On-Farm Water Storage Systems In Porter Bayou Watershed, Mississippi, Richard Ludwig Kirmeyer
Theses and Dissertations
The onarm water storage (OFWS) systems at Metcalf and Pitts farm in Porter Bayou Watershed were monitored for changes in nutrient levels and water withdrawal for irrigation from March 2012 to April 2013. Nitrogen and phosphorus levels were generally higher during the early part of the growing season. The OFWS systems can reduce nitrate and phosphorus in runoff up to 81% and 85%, respectively. However, the systems did not consistently reduce sediment and nutrients especially after significant rainfall and runoff events. The systems provided a total of 130 and 233 acreeet of recycled water for irrigating crops at Metcalf and …
Determination Of Beta-Carotene Content And Consumer Acceptability Of Sweet Potato Cookies By Adults And Preschool Children, Aja Marie Stokes
Determination Of Beta-Carotene Content And Consumer Acceptability Of Sweet Potato Cookies By Adults And Preschool Children, Aja Marie Stokes
Theses and Dissertations
Vitamin A deficiency is recognized as a major health concern worldwide, especially in developing countries. Sweet potatoes are a cash crop that is abundantly grown and available, providing an excellent source of the carotenoid, beta-carotene. Carotenoids are precursors to vitamin A (retinol). Three sweet potato cookie products were developed: glutenree, wheat-containing, and glutenree with extra sweet potato. Products were evaluated by adults and pre-school aged children based on appearance, aroma, texture, flavor, and overall acceptability. Results showed that overall the children liked both the glutenree and wheat-containing cookies (p<0.05). Adults preferred (p<0.05) the glutenree with extra sweet potato and the wheat-containing products. The glutenree cookie contained 10.1 parts per million of beta-carotene as determined by high-performance liquid chromatography.
Survival, Habitat Use, And Spatiotemporal Use Of Wildlife Management Areas By Female Mallards In Mississippi's Alluvial Valley, Joseph David Lancaster
Survival, Habitat Use, And Spatiotemporal Use Of Wildlife Management Areas By Female Mallards In Mississippi's Alluvial Valley, Joseph David Lancaster
Theses and Dissertations
The Mississippi Alluvial Valley (MAV) is an important region for wintering mallards (Anas platyrhynchos) in North America, yet little is known about their spatiotemporal habitat use and related survival in Mississippi. I tracked 126 radio-marked female mallards to quantify survival, habitat use, and use of wildlife management areas (WMAs) with experimental hunt regimes in the south MAV of Mississippi during winters 2010-2012. Daily survival was greatest in agricultural (0.997) and moist-soil (0.999) habitats in winters 2010-2011 and 2011-2012, respectively. Overall interval survival across both winters was 0.60 (SE = 0.02). Forested (40-54%) and moist-soil wetlands (41-59%) received greatest use diurnally …
Evaluation Of Catalytic And Non-Catalytic Production Of Biodiesel From Wet Microbial Media And Reaction Schemes, Adebola Titilope Coker
Evaluation Of Catalytic And Non-Catalytic Production Of Biodiesel From Wet Microbial Media And Reaction Schemes, Adebola Titilope Coker
Theses and Dissertations
Biodiesel is a renewable fuel that can supplement petroleum fuel supply. A major deterrent to commercial biodiesel production from traditional feedstock like soybean, canola or rapeseed oils is the high cost of feedstock: 70 - 95% of total biodiesel production cost. Therefore, a relatively cheaper feedstock is needed to make the price of biodiesel cost-competitive with petroleum diesel. Activated sludge from wastewater treatment plants is a relatively cheaper feedstock and relatively easy to obtain. However, drying of this sludge prior to oil extraction is a major operating cost of this process, as high as 50% of biodiesel production cost. The …
Differentiating The Characteristic Response Of The Brain After Exposure To Blunt And Blast Trauma, Mark Gregory Tejada Begonia
Differentiating The Characteristic Response Of The Brain After Exposure To Blunt And Blast Trauma, Mark Gregory Tejada Begonia
Theses and Dissertations
Military personnel often experience mild traumatic brain injury (mTBI) from exposure to improvised explosive devices (IEDs). Soldiers typically endure blast trauma from the IED pressure wave as well as blunt trauma from ensuing head impacts. Researchers have not reached a consensus on whether the biomechanical response from blunt or blast trauma plays a more dominant role in mTBI because the specific biomechanical sources of injury are often undetermined. Consequently, the goal of this dissertation was to conduct three separate studies in order to characterize the mechanical behavior of the brain after exposure to mTBI conditions. For Study 1, mild blunt …
Differentiation Of Fungal Phytopathogens By Ft-Ir And Maldi-Tof Ms, Curtis Muldrow Atkinson
Differentiation Of Fungal Phytopathogens By Ft-Ir And Maldi-Tof Ms, Curtis Muldrow Atkinson
Theses and Dissertations
The use of matrix assisted laser desorption ionization time-oflight mass spectrometry, Fourier transform infrared spectroscopy, and other analytical means of identifying and differentiating microorganisms hold much promise. These analytical tools have been extensively assessed for their ability to differentiate bacteria and fungi. Most of this research has been coordinated in medically relevant microorganisms, but the technology can work just as well with agriculturally important microorganisms. In this thesis, these technologies were reviewed and then subsequently studied for their ability to differentiate Aspergillus species (that devastate corn and other crops yearly with aflatoxin contamination), as well as Macrophomina phaseolina and Thielaviopsis …
Effects Of Nurr1 Genotype And Aging On Dopamine Neurotransmission And Behavior, Evangel Kummari
Effects Of Nurr1 Genotype And Aging On Dopamine Neurotransmission And Behavior, Evangel Kummari
Theses and Dissertations
Nurr1 is a transcription factor essential for the establishment, development, terminal differentiation and maintenance of mesencephalic dopamine neurons. Nurr1 is thought to coordinate the expression of dopamine neurotransmission genes. Nurr1-null heterozygous (+/-) mice have reduced Nurr1 function, which impacts dopamine neuron function in a region specific manner. Since aging can affect Nurr1 expression, we hypothesize that aging and +/- genotype will have significant effects on dopamine regulation and dopamine related behaviors. To test this hypothesis, regional neurochemistry and behavioral tests of wild type (+/+) and +/- mice at 3 months of age (young) and 12-16 months of age (aged)was performed. …
Waterbird And Seed Abundances In Migratory Bird Habitat Initiative And Non-Managed Wetlands In Mississippi And Louisiana, Matthew Moraco Weegman
Waterbird And Seed Abundances In Migratory Bird Habitat Initiative And Non-Managed Wetlands In Mississippi And Louisiana, Matthew Moraco Weegman
Theses and Dissertations
The USDA Natural Resources Conservation Service (NRCS) implemented the Migratory Bird Habitat Initiative (MBHI) in summer 2010 to provide wetlands for waterbirds inland from the Deepwater Horizon Oil Spill. To evaluate MBHI and associated wetland management practices, I estimated seed and waterbird densities in MBHI and non-managed wetlands in the Mississippi Alluvial Valley (MAV) of Mississippi and Louisiana. Although not statistically different, wetlands enrolled in MBHI contained 1.26 and 1.53 times more seed biomass and seeds consumed by waterfowl than non-managed wetlands, respectively. I also detected 3 times more dabbling ducks and all ducks combined on MBHI wetlands. When I …
Development Of Biomass-Based Cellulose Nanowhiskers And Its Application As Catalyst Support In Converting Syngas To Biofuels, Xiaodan Shi
Theses and Dissertations
The objectives of this research were to develop the best methods for cellulose nanowhiskers (CNWs) preparation from raw biomass materials and the feasibility to perform CNWs as Fe3+ catalyst support in converting syngas to biofuels. Raw kenaf bast and switchgrass were initially pretreated with dilute NaOH followed by dilute H2SO4. High yields of alpha-cellulose were obtained. Hemicellulose, ash, and most lignin were removed during pretreatment. Preparation of CNWs after pretreatment was then conducted via H2SO4 hydrolysis. The most efficient hydrolysis condition was determined as H2SO4 concentration through orthogonal experiments. In contrast with pure cellulose fibers, CNWs supported Fe3+ catalyst applied …