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Articles 1231 - 1260 of 3160
Full-Text Articles in Life Sciences
The Evolution Of Coral Snake Mimicry, Renan Janke Bosque
The Evolution Of Coral Snake Mimicry, Renan Janke Bosque
Electronic Theses and Dissertations
Scientists have regarded mimicry as one of the most amazing examples of the power of natural selection. Early observations by naturalists of the mimetic association between venomous New World coral snakes of the genus Micrurus and harmless mimics has stimulated an intense debate about the causes and consequences of mimicry that persists today. Despite its medical, evolutionary and historical importance our understanding of evolution within the genus Micrurus is negligible. My dissertation explores the evolution of mimicry within South American coral snakes and their mimics using a multi-scale framework involving macroevolutionary (Chapter I), geographic/morphological concordance (Chapters II and III), behavioral …
Stabilization Of Dna I-Motif Structures By 7-Aminoactinomycin D, An Anti-Tumor Drug, Justin Lane Parmely
Stabilization Of Dna I-Motif Structures By 7-Aminoactinomycin D, An Anti-Tumor Drug, Justin Lane Parmely
Electronic Theses and Dissertations
Alternative DNA structures are likely to form from Watson-Crick B-form DNA when antitumor drug known to bind DNA loops -- can affect the iM structure. Our results demonstrate as an i-motif (iM). While both structures are known to exist in vivo they are energetically uphill can utilize intercalating cytosine-cytosine base pairing to form a four-stranded structure known controlled by alternative DNA structures like G4s and iMs. especially during processes that involve superhelical duress. A guanosine rich strand can form a facilitate their stabilization. In this report we present data on how 7-aminoactinomycin D -- an formation. Earlier it was believed …
Cultural Influences On Body Size Ideals Among African American Women In The Mississippi Delta, Lois Marie Coleman
Cultural Influences On Body Size Ideals Among African American Women In The Mississippi Delta, Lois Marie Coleman
Electronic Theses and Dissertations
Results: One-on-one interviews yielded 25 cognitive maps. The maps contained a total of 169 concepts with 294 connections among them. The lowest number of variables identified on a participant’s map was 4 and the highest was 11. The lowest number of connections made on a participant’s map was 4 and the highest was 39. Through qualitative condensing and matrix addition, the 169 concepts were used to create 27 variables with 134 connections. Feedback from focus group participants resulted in the addition of 3 variables and 9 connections.
Extended Adolescence: The Ecology And Endocrinology Of Facultative Paedomorphosis, Jason R. Bohenek
Extended Adolescence: The Ecology And Endocrinology Of Facultative Paedomorphosis, Jason R. Bohenek
Electronic Theses and Dissertations
Phenotypic plasticity is an adaptation to unpredictable environments whereby an organism of a single genotype may express more than one phenotype under differing environmental conditions. Phenotypic plasticity can manifest as polyphenisms, which is an extreme form of phenotypic plasticity that produces two or more discrete, alternative phenotypes. The expression of alternative phenotypes is controlled by biotic and abiotic environmental factors, which variably affect the strength and direction of phenotypic outcomes. Using a model polyphenic salamander, I sought to understand the ecological and hormonal processes that regulate alternative phenotype expression. The mole salamander (Ambystoma talpoideum) and eastern newt ( …
Food Insecurity And Produce Behaviors Of Adults With Children In Rural, Appalachian Mississippi, Tiffany Shirley
Food Insecurity And Produce Behaviors Of Adults With Children In Rural, Appalachian Mississippi, Tiffany Shirley
Electronic Theses and Dissertations
Adults living in food insecure households consume fewer fruits and vegetables than adults living in food secure households (Hanson & Connor, 2014). The purpose of this study was to examine differences in fruit and vegetable behaviors (intakes; perceptions) of parents of elementary school children by food security status (food secure compared to food insecure; fully food secure compared to not fully food secure) in rural, Appalachian Mississippi. A cross-sectional survey of parents (n=1144) recruited from three elementary schools in rural, Appalachian Mississippi utilized validated measures of produce behaviors: 1) fruit, vegetable, and total produce intakes; 2) perceived benefits of barriers …
Variations In The Dragonfly Microbiome Through Life Stages And Its Ability To Harbor Antibiotic Resistant Bacteria, Sarah Russell
Variations In The Dragonfly Microbiome Through Life Stages And Its Ability To Harbor Antibiotic Resistant Bacteria, Sarah Russell
Electronic Theses and Dissertations
Juvenile dragonflies (nymphs) may possess the ability to pass their microbiome to the adult life stage through metamorphosis. If this is so, the environment in which the nymph develops may have an effect on the adult microbiome. In this study, the gut microbiomes of 13 species of dragonfly were compared across life stages and when collected from environments at different levels of urbanization. The gut of each dragonfly was removed, DNA extracted, and a portion of the bacterial 16S rRNA gene amplified and sequenced. Gut suspensions were also plated on antibiotic amended plates to determine the potential for dragonflies to …
Bacterioplankton Biogeography Of The Mississippi River Basin, Jason Taylor Payne
Bacterioplankton Biogeography Of The Mississippi River Basin, Jason Taylor Payne
Electronic Theses and Dissertations
Bacterioplankton are important structural and functional components of river networks yet their biogeographical patterns in these systems are largely unknown. Using Illumina sequencing of the 16S rRNA gene we characterized variation in bacterioplankton community alpha diversity (within-sample richness of operational taxonomic units OTUs) and beta diversity (between-sample differences in composition) (1) along a 1 300-km downstream reach of the Mississippi River (2) over a range of temporal scales in the Lower Mississippi River (LMR) and (3) along cross-sectional transects repeated monthly for six months across the LMR floodplain. Particle-associated assemblages were richer in bacterial OTUs and more productive than free-living …
Child Nutrition Program Managers’ Evaluation Of The Mississippi Recipes For Success (Mrs) Guide, Alexandra Hallmark
Child Nutrition Program Managers’ Evaluation Of The Mississippi Recipes For Success (Mrs) Guide, Alexandra Hallmark
Electronic Theses and Dissertations
Findings from this study can assist MDE-OCN in future updates of the MRS Guide. MRS is an excellent resource for CNP professionals and can be used by other state child nutrition programs as a guide when developing or updating their own menu planning tools and training resources. The Mississippi Department of Education Office of Child Nutrition (MDE OCN) has been assisting child nutrition programs with meeting the nutritional needs of the students since 2000. The Mississippi Recipes for Success (MRS) guide is the latest recipe database developed and updated by MDE-OCN. This guide contains a database that is comprised of …
The Effect Of Magnesium Supplementation On Physical Performance Of Collegiate Football Players, Shannon Marie Boguth
The Effect Of Magnesium Supplementation On Physical Performance Of Collegiate Football Players, Shannon Marie Boguth
Electronic Theses and Dissertations
Mg supplementation can maximize energy stores for exercise, decrease indicators of inflammation, and increase the rate of lactate clearance. While these functions of Mg can benefit exercise capabilities, research is lacking on their effects on specific performance parameters. The purpose of this study was to determine if Mg supplementation would increase performance parameters in NCAA Division-I football players. Eighty-one participants were separated into position groups and randomly assigned to receive a daily placebo, low dose of Mg (100 mg), or high dose of Mg (200 mg). Participants completed a pre- and post-test for performance parameters that included 1RM clean, 1RM …
Evaluation Of Best Practices In Child Nutrition At Child Care Centers In Mississippi, Whitney Clara Black
Evaluation Of Best Practices In Child Nutrition At Child Care Centers In Mississippi, Whitney Clara Black
Electronic Theses and Dissertations
Results: Survey responses indicated that the majority of directors rated themselves as skilled at several key areas of best practices, especially in creating a clean, pleasant place for the children to eat and in using program nutrition requirements to ensure that food and nutrition needs of the children are met. Analysis of the center menus proved the latter to be true as the recommendations for Vitamin A, Vitamin C, calcium, and iron were either met or exceeded for females 4-8 years-old, and males 4-8 years-old. A need for more training was also indicated, especially in writing food and nutrition procedures …
Environnmental Influences On Caribbean Octocoral-Symbiodiniaceae Symbioses, Mark Mccauley
Environnmental Influences On Caribbean Octocoral-Symbiodiniaceae Symbioses, Mark Mccauley
Electronic Theses and Dissertations
A Caribbean octocoral colony is an assemblage of the octocoral host, dinoflagellate algae (family Symbiodiniaceae), bacteria and other microbes, together functioning as meta-organism (holobiont). Even though octocorals dominate many Caribbean reefs, compared to scleractinian corals, little is known about their biology under ambient or potentially stressful conditions. Of the nine species of octocorals (gorgonian corals, Order: Alcyonacea) studied, each had significantly different polyp behaviors, biochemical compositions, Symbiodiniaceae parameters, isotopic signatures, in addition to hosting distinct microbial assemblages. We identified multiple Symbiodiniaceae species (Breviolum minutum, Breviolum B41, Breviolum B1a and Breviolum B1i), inhabiting the gorgonians. These symbioses were temporally and …
Analysis Of Brevundimonas Subvibrioides Developmental Signaling Systems Reveals Unexpected Differences Between Phenotypes And C-Di-Gmp Levels, Lauryn Anne Sperling
Analysis Of Brevundimonas Subvibrioides Developmental Signaling Systems Reveals Unexpected Differences Between Phenotypes And C-Di-Gmp Levels, Lauryn Anne Sperling
Electronic Theses and Dissertations
The DivJ-DivK-PleC signaling system of Caulobacter crescentus is a signaling network that regulates polar development and the cell cycle. This system is conserved in closely related bacteria, including the sister genus Brevundimonas. Previous studies had shown unexpected phenotypic differences between the C. crescentus divK mutant and the analogous mutant of Brevundimonas subvibrioides, but further characterization was not performed. Here, phenotypic assays analyzing motility, adhesion, and pilus production (the latter characterized by a newly discovered bacteriophage) revealed that divJ and pleC mutants have mostly similar phenotypes as their C. crescentus homologs, but divK mutants maintain largely opposite phenotypes than …
Description And Alleviation Of The Stress Response In Atlantic Sharpnose Sharks (Rhizoprionodon Terraenovae), White-Spotted Bamboo Sharks (Chiloscyllium Plagiosum), And Golden Shiners (Notemigonus Crysoleucas), Lauren Nicole Fuller
Electronic Theses and Dissertations
Sharks are an essential component of many marine ecosystems; however they have experienced population declines mainly attributed to overfishing and capture of sharks as bycatch. Despite sharks often being released when captured as bycatch the act of capture can result in a stress response which may cause severe physiological perturbations. Studies have investigated the physiological impacts of capture stress on elasmobranchs but most have primarily focused on the secondary stress response. I conducted a series of studies to further describe the primary stress response through quantification of adrenocorticotropic hormone (ACTH) while also investigating methods such as sedation and limiting air …
Application And Refinement Of Molecular Ecology Techniques For Amphibian Conservation, Stephanie Marie Burgess
Application And Refinement Of Molecular Ecology Techniques For Amphibian Conservation, Stephanie Marie Burgess
Electronic Theses and Dissertations
Wildlife conservation has become increasingly difficult due to habitat loss habitat fragmentation and land use change. Thus conservationists have embraced advances in molecular ecology such as landscape genetics and microbial bioinformatics that employ genetic techniques to further understand the relationship between individuals and their environment. In landscape genetics model inferences can be used to identify features that facilitate or resist gene flow providing a framework for anticipating the impacts of land use changes on a species’ ability to disperse. However the factors that affect the transferability of landscape genetics inferences are poorly understood and little is known about the effect …
The Influence Of Site Connectivity On Zooplankton Assemblage Dynamics Within The Lower Mississippi River Floodplain, Jarrod Sackreiter
The Influence Of Site Connectivity On Zooplankton Assemblage Dynamics Within The Lower Mississippi River Floodplain, Jarrod Sackreiter
Electronic Theses and Dissertations
Zooplankton are important components of the food web of such lotic systems. Although capable of motility, they are weak swimmers and their distribution and community composition across a floodplain is strongly affected by patterns of water flow and hydrologic connectivity. However, there has been little research on the zooplankton dynamics of large rivers, such as the Lower Mississippi River (LMR). From morphological identification of zooplankton across the connectivity gradient, I assessed the degree to which hydrologic connectivity acts as an explanatory factor influencing spatial and temporal variation in zooplankton assemblage structure. Second, I compared the use of morphological identification to …
Do Individual Responses To Resistance Exercise Exist To An Extent That Can Be Detected Beyond That Of Measurement Error/Random Biological Variability?, Scott J. Dankel
Do Individual Responses To Resistance Exercise Exist To An Extent That Can Be Detected Beyond That Of Measurement Error/Random Biological Variability?, Scott J. Dankel
Electronic Theses and Dissertations
Millions of dollars are spent analyzing inter-individual differences in response to resistance exercise, but the lack of a non-exercise control group means they may simply be examining random error. The purpose of this study was to determine whether there are inter-individual differences in response to two distinct resistance exercise protocols. Participants (n=151) were randomly assigned to one of 3 groups as follows: (1) a traditional exercise group performing 4 sets to failure with a load that could be lifted 8-12 times; (2) a one-repetition maximum (1RM) training group performing a 1RM test each visit; and (3) a non-exercise control group. …
An Experimental Test Of Controls On Resource Exchange In An Ectomycorrhizal Mutualism, Amber Lynn Horning
An Experimental Test Of Controls On Resource Exchange In An Ectomycorrhizal Mutualism, Amber Lynn Horning
Electronic Theses and Dissertations
Models of resource exchange mutualisms utilize economic principles to explain how the costs and benefits of these interactions vary with environmental context. All of these models use a ratio of resource exchange (e.g., nitrogen: carbon) as the central variable, and it is unclear whether such exchange ratios predict outcomes of mutualisms in natural systems. Corrêa et al. (2008) hypothesized instead that the absolute flux of the most limiting nutrient, rather than the ratio of the two exchanged resources, best explains the benefits of resource exchange mutualisms. To distinguish between these two competing hypotheses, we measured resource transfers, and their ratios, …
Pharmacokinetic Study Of Novel Anthraquinone Analogues, Yuhan Guo
Pharmacokinetic Study Of Novel Anthraquinone Analogues, Yuhan Guo
Electronic Theses and Dissertations
Small molecules functioning as negative regulators of MDM2 have been considered as promising anti-cancer agents. A series of novel anthraquinone (AQ) analogues upregulate p53, a well-known tumor suppressor, by inactivating its antagonist protein MDM2. The novel AQ compounds synthesized through the modifications on the rhein scaffold were reported to have successfully arrested tumor growth. To have a better understanding of their underlying metabolism in vivo, pharmacokinetic (PK) studies were performed for the AQ compounds. A selective, accurate and reproducible assay methodology for PK study was set up for each AQ compound. The stabilities of AQ compounds were then evaluated …
Expression Of Tumor Necrosis Factor-Alpha In A Chick Model Of Stress Vulnerable, Treatment – Resistant Depression, Mary Katherine Jourdan
Expression Of Tumor Necrosis Factor-Alpha In A Chick Model Of Stress Vulnerable, Treatment – Resistant Depression, Mary Katherine Jourdan
Electronic Theses and Dissertations
An increasing body of literature suggests a Major Depressive Disorder subpopulation, Treatment Resistant Depression (TRD), is associated with an increased immune response. More than a decade of research has identified and begun to validate a novel animal model of TRD. This study sought to determine whether TNF-α levels would be altered due to isolation stress and differentiated between stress-vulnerable and -resilient strains. Black Australorp and Production Red chicks were placed into isolation for varying times during which Distress Vocalization (dVoc) rates were calculated and transformed into entry into behavioral despair percent thresholds. Blood levels of TNF- α were quantified via …
Unraveling The Role Of Phenylethanolamine N-Methyltransferase (Pnmt+) Cells In-Vivo, Sanjana Manja
Unraveling The Role Of Phenylethanolamine N-Methyltransferase (Pnmt+) Cells In-Vivo, Sanjana Manja
Electronic Theses and Dissertations
Phenylethanolamine N-methyltransferase (Pnmt) is the enzyme that N-methylates norepinephrine to produce the stress hormone/neurotransmitter, epinephrine, which is abundantly expressed in adrenal glands. Developmental studies have also identified Pnmt expression in the embryonic heart and several areas of the brain, including brainstem, cerebellum, and hypothalamus. Thus, we hypothesize that selective ablation of Pnmt+ cells will have detrimental effects on cardiovascular, neuromuscular, and metabolic processes. To uncover the importance of Pnmt+ cells in vivo, we generated a novel Diphtheria Toxin A (DTA) suicide model (Pnmt+/Cre; R26+/DTA) to selectively ablate Pnmt-expressing (Pnmt+) cells in mice. Appearing normal at birth, Pnmt-Cre/DTA mice began to …
Bone Morphogenetic Protein 7 Inhibits Pyroptotic Cell Death In Vascular Smooth Muscle Cells Of Atherosclerotic Apolipoprotein E -/- Mice, Kaley Garner
Electronic Theses and Dissertations
Atherosclerosis (ATH) is an inflammation-mediated disease in which cell death underlies the formation of lesions along the intima layer of vascular walls resulting in vessel narrowing, decreased blood flow, and increased risk of lesion rupture leading to myocardial infarction and stroke. The current study was undertaken to investigate whether inflammation in ATH can induce pyroptosis in vascular smooth muscle cells (SMC's). We therefore hypothesized that pyroptosis occurs and is inhibited by bone morphogenetic protein 7 (BMP7). We examined SMC pyroptosis at acute (D5) and midstage (D28) following disturbed flow-induced hemodynamic injury to the vascular wall using our partial left carotid …
Seascape Genetics And Rehabilitation Efficiency In The Florida Manatee, Madison Hall
Seascape Genetics And Rehabilitation Efficiency In The Florida Manatee, Madison Hall
Electronic Theses and Dissertations
The Florida manatee (Trichechus manatus latirostris) was recently downlisted federally from "endangered" to "threatened" despite acknowledgments of remaining threats to long term population persistence. Challenges to future manatee conservation include, but are not limited to, increases in frequency of harmful algal blooms, intensifying anthropogenic disturbance, and loss of warm-water habitat. The goals of this dissertation were 1) to assess threats to the manatee via a comprehensive, long-term (1973-2016), retrospective analysis of the manatee rescue and rehabilitation partnership (MRRP) and 2) to use seascape genetics analysis to examine whether abiotic, biotic, or anthropogenic seascape variables could significantly describe genetic distance patterns …
Understanding Sediment Biogeochemistry And The Role Of Juvenile Oysters On Recently Restored Eastern Oyster Reefs, Bryan Locher
Understanding Sediment Biogeochemistry And The Role Of Juvenile Oysters On Recently Restored Eastern Oyster Reefs, Bryan Locher
Electronic Theses and Dissertations
In recent decades, goals for the restoration of eastern oyster (Crassostrea virginica) populations along the eastern coast of the United States have shifted from increasing harvestable oyster fisheries to enhancing the range of ecosystem services provided by oyster reefs. By filtering large volumes of water and releasing nutrient-rich feces and pseudofeces, oysters can locally enhance sediment biogeochemical cycling compared to that of unstructured benthic environments. An ongoing restoration program in Mosquito Lagoon, FL was leveraged to assess the immediate impacts ( < 1 year) of restoration on sediment biogeochemical properties of oyster reefs. The first study measured both short-term and long-term pools of carbon, nitrogen and phosphorus on dead, natural and restored reefs periodically over one year. The second study investigated one of the contributions to sediment nutrient pools by comparing feeding and feces/pseudofeces nutrient content of juvenile and older oysters. Results show that inorganic nitrogen and phosphorus pools can change within weeks after restoration and total nutrient pools by 6 months post-restoration. Restored reefs experienced a 136 % increase in ammonium, 78 % increase in total nitrogen, 46 % increase in total phosphorus, and 75 % increase in organic matter concentrations after 12 months of restoration. These nutrient increases were all positively correlated with oyster density, shell length and reef height measured on each reef. When standardized to grams of dry tissue weight, juvenile oysters showed significantly higher rates of chlorophyll-a removal, release of ammonium, and biodeposits with higher concentrations of dissolved organic carbon, nitrite + nitrate, and ammonium. The short-term changes to biogeochemical cycling on eastern oyster reefs within the first year of restoration are important to managers seeking to monitor ecosystem service recovery and overall coastal ecosystem health.
Exploring Multi-Scale Variation Of Fish Community Diversity In A Dynamic Coastal Estuary, Brittany Troast
Exploring Multi-Scale Variation Of Fish Community Diversity In A Dynamic Coastal Estuary, Brittany Troast
Electronic Theses and Dissertations
Examining diversity over multiple spatial and temporal scales affords the opportunity to develop a mechanistic understanding of the factors influencing community diversity dynamics, and how these may shift in a changing world. This thesis first examines multi-decadal fish community diversity metrics across a coastal biogeographic transition zone to quantify changes in species assemblages, assess relationships between fish community diversity and the abiotic environment, and capture potential shifts in the location of a putative biogeographic break. Results of this chapter indicate not only a change in fish community composition, but also a shift in the location of the biogeographic transition zone. …
Variation In Prospecting Behavior And Drivers Of Post-Fire Habitat Preference Among Juvenile Florida Scrub-Jays, David Sherer
Variation In Prospecting Behavior And Drivers Of Post-Fire Habitat Preference Among Juvenile Florida Scrub-Jays, David Sherer
Electronic Theses and Dissertations
Florida Scrub-Jays (Aphelocoma coerulescens, FLSJ; federally Threatened) are cooperatively breeding birds endemic to Florida and dependent on fire-maintained xeric oak scrub. FLSJs are year-round residents, highly territorial, and rarely disperse far from their natal territory. Lifetime reproductive success is highest among individuals breeding in early-successional habitat, usually less than 9 to 10 years post-fire. However, because scrub burns infrequently such early-successional, high-quality habitat is extremely limited and competition for it as breeding space is likely intense. Because some birds live long enough to experience habitat succession, FLSJs also occupy later-successional overgrown scrub, even though both survival and fecundity decline. Although …
Molecular Basis Of Membrane Pore Formation By Amyloid Beta Peptide, Nabin Kandel
Molecular Basis Of Membrane Pore Formation By Amyloid Beta Peptide, Nabin Kandel
Electronic Theses and Dissertations
Alzheimer's Disease (AD) is a neurodegenerative disorder that affects around 50 million people worldwide and causes cognitive decline, brain atrophy and death. Despite extensive basic and clinical studies and drug development efforts, currently no effective treatments are available for AD. The amyloid β (Aβ) peptide is neurotoxic and is tightly associated with AD pathology, but the molecular mechanism of its action remains unclear. There are various forms of Aβ in the brain, ranging from the full length Aβ1-42 to shorter peptides, such as a strongly toxic Aβ25-35 fragment. The Amyloid Cascade Hypothesis (ACH) postulated that extracellular Aβ deposits cause the …
Ribbeting Results: Emergent Infectious Diseases In Wetland Systems, Ariel Horner
Ribbeting Results: Emergent Infectious Diseases In Wetland Systems, Ariel Horner
Electronic Theses and Dissertations
North American amphibians have recently been impacted by two major emerging pathogens, the fungus Batrachochytrium dendrobatidis (Bd) and iridoviruses in the genus Ranavirus (Rv). Environmental, seasonal and host factors may play important roles in disease dynamics, but few studies incorporate these components into their analyses. Here, we investigated the role of environmental, seasonal, genetic and location effects on driving Bd and Rv infection prevalence and severity in a biodiversity hot spot, the southeastern United States. We used quantitative PCR to characterize Bd and Rv dynamics in natural populations of three amphibian species: Notophthalmus perstriatus, Hyla squirella and Pseudacris ornata and …
Optimization Of Reproductive Success In Beef Cattle By Implementation Of Estrus Resynchronization, Nutritional Management, And Evaluation Of Disease Prevalance, Kaitlin M. Epperson
Optimization Of Reproductive Success In Beef Cattle By Implementation Of Estrus Resynchronization, Nutritional Management, And Evaluation Of Disease Prevalance, Kaitlin M. Epperson
Electronic Theses and Dissertations
The beef industry is a unique community of operations that employ different management techniques to accomplish a similar goal. Like other facets of animal agriculture, profitability of the beef industry is heavily reliant upon the implemented management practices. Reproductive efficiency is an area of management that has great potential to positively influence the success of beef production. Through the use of reproductive technologies such as estrus synchronization and AI, a greater percentage of females can become bred to superior sires, breeding and calving seasons can be shortened, calf uniformity increased, and economic return maximized (Odde, 1990; Rodgers et al., 2012; …
Nodule Zone-Specific Gene Expression In Soybean, Sadikshya Aryal
Nodule Zone-Specific Gene Expression In Soybean, Sadikshya Aryal
Electronic Theses and Dissertations
Nitrogen is one of the most limiting nutrients for plant growth and yield. Leguminous plants such as soybean (Glycine max) have developed the ability to form a symbiotic association with nitrogen fixing rhizobia. This symbiotic association results in the formation of unique structures called nodules that originate from root cortex via de novo cell differentiation. During soybean nodule development, two major nodule zones, the Nodule primordium (Npr) in the center and the nodule parenchyma (Npa) in the periphery, are clearly distinguishable. Npr gives rise to infection zone (IZ), and the Npa holds vascular bundles. However, it is not clear what …
Improvement Of Dried Distillers’ Grains With Solubles Utilizing Pretreatments And Fungal Fermentation, Burgandy Zschetzsche
Improvement Of Dried Distillers’ Grains With Solubles Utilizing Pretreatments And Fungal Fermentation, Burgandy Zschetzsche
Electronic Theses and Dissertations
Limited inclusion of distillers’ grains in animal feed is primarily due to low protein and high fiber content. Other elements, such as phytate phosphorus levels in DDGS are still an issue for monogastric animals such as swine, poultry, and fish. Furthermore, unabsorbed phytic acid in manure poses a high risk for environmental pollution, because bacteria can hydrolyze phytic acid into free phosphorus that can result in algal blooms and eutrophication of surface or ground water. The objective of this thesis was to improve the nutritional value of corn dried distillers’ grains with solubles (DDGS). This was done utilizing submerged fungal …