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Articles 2371 - 2400 of 5973
Full-Text Articles in Entire DC Network
Development And Characterization Of Shellac-Hydroxypropyl Methyl Cellulose Composite Films With Acid Catalyst, Sana Asrar
All Theses
The objective of this research was to develop a shellac-hydroproyl methyl cellulose (Sh-HPMC) composite film with enhanced water vapor barrier. Citric acid (CA) was used as an acid catalyst, to promote miscibility between HPMC and shellac. In a preliminary test, three different concentrations of CA (1000:1, 200:1, 100:1) were tested to identify the best Sh:CA ratio. Based on the Water vapor permeability properties and mechanical properties, Sh-CA (1000:1 ratio) had the most enhanced water vapor barrier and the lowest reduction in tensile strength compared to the pure HPMC film (control). In the later part of the research, the effect of …
Assessment Of Viability Of Probiotic Bacteria In Non Dairy Food Matrices Under Refrigeration Storage, Muthu Dharmasena
Assessment Of Viability Of Probiotic Bacteria In Non Dairy Food Matrices Under Refrigeration Storage, Muthu Dharmasena
All Theses
Functional foods serve nutrients and physiologically active components for a healthy living. In most countries, the products related to having a healthy gut dominate the functional foods market. These products are prebiotics, probiotics and synbiotics. Concerning the health benefits, various probiotics are introduced to food matrices. Though dairy is the ideal food matrix for probiotics, the trend of non-dairy probiotics is growing among consumers.
This study included two research objectives: surveying the commercial probiotic containing products for probiotic level and developing a practical home-made probiotic fermentation process. The first part of this study was mainly based on assessing viability of …
Chromosomal Patterns In Populations Of The Black Fly Simulium Fibrinflatum Twinn (Diptera: Simuliidae), Kyle Parks
Chromosomal Patterns In Populations Of The Black Fly Simulium Fibrinflatum Twinn (Diptera: Simuliidae), Kyle Parks
All Theses
Cryptic species are an important component of biodiversity, although most cryptic species have yet to be discovered. Cytogenetic studies of polytene chromosomes offer a unique level of resolution for detecting cryptic species in the family Simuliidae. Simulium fibrinflatum is a black fly morphospecies that is suspected to contain cryptic species because of its broad geographic range and variable pupal gill structure. Populations of Simulium fibrinflatum from the Saugahatchee River, AL; Anthony Shoals, GA; LaHave River, Nova Scotia; Westfield River, MA; Chauga River, SC; and Enoree River, SC, were sampled and cytogenetically analyzed to test for the presence of cryptic species. …
The Effect Of Food Ingredients On The Oxygen Barrier Properties Of Retort Materials, Amanda Ward
The Effect Of Food Ingredients On The Oxygen Barrier Properties Of Retort Materials, Amanda Ward
All Theses
An unexplored area in research is addressing how retorted food ingredients interact with retort packaging's oxygen barrier. Ten common food ingredients (whey protein isolate, soy protein isolate, bovine gelatin, fish gelatin, high molecular weight fish gelatin, water, air, oil, potato starch, and hydroxypropyl methylcellulose) were assessed to find their effect on the barrier properties of CPP, PET, and high barrier commercial retort pouches. OxySense Gen III 300 and Mocon OxTran 2/21 were used to evaluate the samples. CPP pouches were first assessed with the OxTran 2/21 and indicated that treatments affected the OTR's of the film materials. However, results from …
Fluid Uptake By The Lepidopteran Proboscis In Relation To Structure, Karena Kwauk
Fluid Uptake By The Lepidopteran Proboscis In Relation To Structure, Karena Kwauk
All Theses
Three species of butterflies--eastern tiger swallowtail (Papilio glaucus L.), monarch (Danaus plexippus L.), and painted lady (Vanessa cardui L.)--were used to investigate the effect that exposing multiple regions of the proboscis to fluid has on feeding rate. Although the lepidopteran proboscis historically has been considered a sealed tube with a specialized region near the tip for fluid uptake, droplets of 1% sucrose solution were shown to enter multiple locations along the proboscis. Feeding experiments were conducted comparing fluid uptake rates of butterflies with their proboscises either fully or partially submerged in 1% or 15% sucrose solutions. Only one significant relationship …
The Social Psychology Of Evil: A Look At Abu Ghraib, Kristin Richardson
The Social Psychology Of Evil: A Look At Abu Ghraib, Kristin Richardson
All Theses
In the spring of 2004, the military police assigned to guard the Abu Ghraib prison in Baghdad, Iraq found themselves at the center of numerous investigations regarding the abuse, torture, rape, and murder of detainees in United States custody. Their behavior was influenced and encouraged by U.S. officials, including President George W. Bush and Secretary of Defense Donald Rumsfeld. The Bush administration effectively created a reality for the military police that fostered increasingly violent and aggressive tendencies beyond what is expected or allowed in similar circumstances. Existing literature and conclusions from previous studies support the claim that social and situational …
Biomass And Lipid Production From Heterotrophic And Mixotrophic Fed-Batch Cultivations Of Microalgae Chlorella Protothecoides Using Glycerol, Shwetha Sivakaminathan
Biomass And Lipid Production From Heterotrophic And Mixotrophic Fed-Batch Cultivations Of Microalgae Chlorella Protothecoides Using Glycerol, Shwetha Sivakaminathan
All Theses
Chlorella protothecoides is a microalga that can grow both photo-autotrophically and/or heterotrophically under different culture and environmental conditions. In this study both the heterotrophic growth and mixotrophic growth have been conducted. The heterotrophic experiments were conducted completely in the dark while the mixotrophic experiments had the dark cycles with periodic light exposure. The aim of the study was to independently understand the effect of each mode on biomass and lipid yields.
For the heterotrophic experiments, glycerol was used as an external organic carbon source while yeast extract was used as the nitrogen source. The carbon and nitrogen source were added …
Methods For Producing Stereoscopic Imagery, Matias Volonte
Methods For Producing Stereoscopic Imagery, Matias Volonte
All Theses
This paper describes methodologies for creating computer graphics stereoscopic imagery. This thesis details the positive and negative aspects for producing and post-producing stereoscopic imagery using different stereoscopic tools provided by Autodesk Maya and The Foundry Nuke. Also, in order to increase efficiency and decrease production time, Python tools were developed both for Maya and Nuke. Finally, the methodology proposed in this paper is fully functional and can be adopted by any production.
From Confederate Expatriates To New South Neo-Filibusters: Major Edward A. Burke And The Americas, Michael Powers
From Confederate Expatriates To New South Neo-Filibusters: Major Edward A. Burke And The Americas, Michael Powers
All Theses
The traditional historiography of the American South presents the New South creed as a vision emphasizing national reconciliation based upon the advancement of Southern commerce and industry. In addition, scholars broadly define New South spokesmen as men who came to maturity after the Civil War and did not involve themselves in state or national politics. An examination of Major Edward Austin Burke, however, reveals that at least one pivotal New South booster was a Confederate veteran and leading political figure; it also suggests the presence of an international component inherent in the New South paradigm of the 1880s. It is …
Microstructural And Mechanical Characterization Of Soy-Based Polyethylene Fibers, Ozgun Ozdemir
Microstructural And Mechanical Characterization Of Soy-Based Polyethylene Fibers, Ozgun Ozdemir
All Theses
Bio-composite fibers have attracted increasing attention from environmentally-conscious consumers because of their low cost and biodegradability. Soy protein isolates and other purified forms have been proposed as bio-based substitutes for pure synthetic polymers for use in textiles. However, fibers from pure soy proteins do not possess adequate properties for use as textile fibers. Therefore, this research aimed to investigate composite fibers consisting of soy and polyethylene for their microstructure and mechanical properties. Changes in properties with increasing filler content and long-term properties of fibers were systematically examined.
First, the microstructure of the fibers was investigated by optical analysis. Six different …
Relating Burst Pressure To Seal Peel Strength In Pouches, William Bernal
Relating Burst Pressure To Seal Peel Strength In Pouches, William Bernal
All Theses
This work was aimed at studying the relationship between burst pressure and seal peel strength. Past researchers developed a force balance equation based on the analysis of a force diagram to relate burst pressure to seal strength. The theoretical formula S=P(D/2) (S=Seal Strength, P=Burst Pressure, D=Restraining Plate Gap) has been studied by past researchers with contrasting results.
The theoretical formula was tested by varying dwell time to produce seals of varying strength. Pouches were burst tested at each of these dwell times to obtain burst pressures, burst peeling times, and burst locations. Corresponding peel tests were performed with crosshead speeds …
Arsenic Affects Muscle Development And Structure In Fundulus Heteroclitus, Angela D'Amico
Arsenic Affects Muscle Development And Structure In Fundulus Heteroclitus, Angela D'Amico
All Theses
Arsenic is a naturally occurring metalloid that can enter rivers and ground water. Epidemiological studies have correlated arsenic exposure with adverse developmental outcomes such as low birth weight, delays in the use of musculature, and altered locomotor activity. Previously in our lab, embryonically exposed killifish (Fundulus heteroclitus) were found to have changes in muscle development. Microarray analysis showed several genes involved in muscle development and formation altered and histological analysis showed an increase in small muscle fiber size. In this study, killifish were used to help understand if changes in muscle formation and fiber density after embryonic exposure persist, are …
The Formulation Of A Bone Targeted Drug Delivery System Of Poly(Glycolic Acid)-Poly(Ethylene Glycol) Coated Hydroxyapatite Nanoparticles For The Delivery Of Statins, Erika Jelen
All Theses
Bone is a form of mineralized connective tissue that provides strength and rigidity to the skeleton. The two primary components within bone tissue are an organic extracellular matrix, containing type I collagen, and an inorganic mineral component composed mainly of calcium phosphate hydroxyapatite crystals. Over time the microarchitecture of bone can break down due to a variety of different factors, mainly the onset of osteoporosis in post-menopausal women, Paget's disease, and the experience of a loss of gravity during space flight. Currently there are about ten million people in the United States alone suffering from osteoporosis.
The prevention of further …
Mass Latex Balloon Releases And The Potential Effects On Wildlife, Stephan Irwin
Mass Latex Balloon Releases And The Potential Effects On Wildlife, Stephan Irwin
All Dissertations
The first component of the study examined the fate of balloons after release to determine aspects of where, in what state, and how long they persist in the environment to assess potential risk of exposure to wildlife. Tagged balloons from sporting events gave estimates of mean distances traveled from releases. Effects on the structural integrity of the latex balloon as it reaches the upper atmosphere were also tested to determine the physical state when fragments landed. Degradation studies were conducted to determine the length of time latex can persist in the environment after exposure to various environmental conditions (sun, shade, …
Toward A Theory Of Media Reconciliation: An Exploratory Study Of Closed Captioning, Nicole Snell
Toward A Theory Of Media Reconciliation: An Exploratory Study Of Closed Captioning, Nicole Snell
All Dissertations
This project is an interdisciplinary empirical study that explores the emotional experiences resulting from the use of the assistive technology closed captioning. More specifically, this study focuses on documenting the user experiences of both the D/deaf and Hearing multimedia user in an effort to better identify and understand those variables and processes that are involved with facilitating and supporting connotative and emotional meaning making. There is an ever present gap that defines closed captioning studies thus far, and this gap is defined by the emphasis on understanding and measuring denotative meaning making behavior while largely ignoring connotative meaning making behavior …
Lignin Modification In Arabidopsis And Populus For Studies Of Gene Function And Improving Lignin Degradation, Yi Xu
All Dissertations
Lignin is one of the most abundant biopolymers in plants and plays an important role in plant structure and stress defense. Lignin is also considered to be a hallmark of vascular plants because of its crucial role in plant terrestrialization. However, lignin is an undesired component in the pulp and paper industry, bioethanol production, and forage digestibility. Thus, understanding the functions and the evolution of lignin biosynthesis genes can not only advance our knowledge of the evolution of land-adaptation for vascular plants but also help guide the effort to exploit the potential for genetic manipulation of lignin for desirable traits …
Adolescent Perceptions Of Digital Play: A Study In Third-Person Effects, Wendy Blanchard
Adolescent Perceptions Of Digital Play: A Study In Third-Person Effects, Wendy Blanchard
All Dissertations
ADOLESCENT PERCEPTIONS OF DIGITAL PLAY:
A STUDY IN THIRD-PERSON EFFECTS
ABSTRACT
With the third-person effect as a conceptual framework, this study examined perceived effects of digital media and electronic devices among charter high school students in the Southeastern United States. In studying third-person perceptions, the study built on research by Schmierbach, Boyle, Xu and McLeod (2011), who analyzed perceived effects of digital gaming among college students.
In addition to items addressing the positive and negative effects of digital media and electronic devices, participants in the current research responded to questions about time spent exercising and in the outdoors, time spent …
The Influence Of Flagship Species On In Situ And Ex Situ Wildlife Tourists' Connection To Wildlife And Pro-Conservation Behaviors, Jeffrey Skibins
The Influence Of Flagship Species On In Situ And Ex Situ Wildlife Tourists' Connection To Wildlife And Pro-Conservation Behaviors, Jeffrey Skibins
All Dissertations
Annually, millions of tourists visit natural areas and zoos primarily to view flagship species such as lions and elephants. Venues rely on the inherent charisma of these species to increase visitation and anchor conservation efforts. Expected visitor outcomes from the use of flagships include raised levels of awareness and pro-conservation behaviors. However, the role of flagships in wildlife tourism has been criticized for not delivering conservation benefits for species of interest or biodiversity, and producing negative site impacts. Furthermore, little is known about how the connection to a species influences conservation behaviors. This dissertation addresses this gap in knowledge by …
Ecology And Phylogeny Of The Biting-Midge Genus Culicoides (Diptera: Ceratopogonidae), Dustin Swanson
Ecology And Phylogeny Of The Biting-Midge Genus Culicoides (Diptera: Ceratopogonidae), Dustin Swanson
All Dissertations
Flies of the genus Culicoides are small, biting midges in the family Ceratopogonidae. These flies are of medical, veterinary, and economic importance because their blood-feeding behavior can cause stress to hosts and transmit disease agents. Despite the importance of these flies, little is known about their biology, especially the ecology of the immature stages and the phylogenetic relationships among taxa. The objectives of my study were to address these two areas of Culicoides biology.
Larval Culicoides were collected from aquatic habitats in four ecoregions of South Carolina, USA. Eleven ecological variables were recorded for each sample. Larvae were identified by …
Avian Phenology, Climate, And Land-Use Conservation Assessed At Broad Spatial And Temporal Scales Using Interdisciplinary Approaches And Citizen Science, Jason Courter
All Dissertations
Current natural resource challenges include global alteration of land cover, loss of biodiversity, impacts from increasing demands for agricultural products, and climate change. Birds are often used to assess the effects of ecological stressors because they are sensitive to environmental changes, ubiquitous and charismatic, and long-term monitoring programs have been in place for more than a century. I demonstrate the effects of climate change on avian migration and nesting dates and the potential value of using interdisciplinary approaches and citizen science to address contemporary ecological challenges. I examine Ruby-throated Hummingbird (Archilochus colubris) migration in the eastern United States from 1880-2010 …
The Influence Of Land Use On Fish Health And Fish Communities In Wadeable Steams In South Carolina, Andrew Sayer
The Influence Of Land Use On Fish Health And Fish Communities In Wadeable Steams In South Carolina, Andrew Sayer
All Dissertations
In 2011 the State of South Carolina population was over 4.6 million people and has increased at a rate of around 15% (1.5% per year) throughout the last decade. While the population density per square mile is relatively low compared to other US states, it seems certain the population will further increase in years to come. Increasing population density leads to urbanization resulting in an increase in impervious surfaces such as roadways, parking lots, and building roofs. This changing land use can have dramatic effects on smaller streams and creeks which form the upper reaches of watersheds. Although water systems …
Environmental Implications And Applications Of Nanomaterials, Priyanka Bhattacharya
Environmental Implications And Applications Of Nanomaterials, Priyanka Bhattacharya
All Dissertations
Recent advances in material science and nanotechnology have given rise to a myriad of developments, while in the meantime call for research into the impacts of nanomaterials on the environment and human health. Although considerable progress has been made in the past decade concerning the behavior of nanomaterials in biological systems, such understanding is critically lacking with respect to the fate of nanomaterials in ecosystems.
Accordingly, this dissertation addresses the interactions between nanomaterials and algae--the major constituent of the aquatic food chain (Part I, Chapter two), and exploits the physicochemistry of nanoscaled synthetic dendritic polymers for environmental applications, especially for …
Design Of Advanced Fouling-Resistant And Self-Cleaning Membranes For Treatment Of Oily And Impaired Waters, Daniel Wandera
Design Of Advanced Fouling-Resistant And Self-Cleaning Membranes For Treatment Of Oily And Impaired Waters, Daniel Wandera
All Dissertations
The overall goal of my Doctor of Philosophy (PhD) research was to design and develop advanced anti-fouling and self-cleaning membranes for treating impaired waters. Initial work focused on the development of membranes to treat produced water, which is oily wastewater that is co-produced during oil and gas exploration. Economical, environmentally sustainable treatment of the large volumes of produced water is a grand challenge for oil and gas companies. While membranes offer many advantages over more conventional treatment methods, membrane-based treatment processes for oily waters often fail due to membrane fouling. Therefore, the primary objective of my doctoral research was to …
Methods Of Inhibiting Multiple Cytochrome P450 Genes With Sirna, William S. Baldwin
Methods Of Inhibiting Multiple Cytochrome P450 Genes With Sirna, William S. Baldwin
Clemson Patents
The present invention relates to siRNAs that are targeted to RNAs encoding two or more enzymes of a subfamily of cytochrome P450 (CYP) enzymes, along with vectors, cells, and kits comprising the siRNAs. The invention further relates to methods of decreasing expression of two or more CYP subfamily genes in a non-human animal, animals in which expression of two or more CYP subfamily genes has been decreased, and methods of using such animals to study the function of cytochrome P450 enzymes.
Evaluation Of An Enrichment Culture That Reductively Dechlorinates Γ-Hexachlorocyclohexane, Christina Anderson
Evaluation Of An Enrichment Culture That Reductively Dechlorinates Γ-Hexachlorocyclohexane, Christina Anderson
All Theses
In a previous study using microcosms from a site contaminated with γ- hexachlorocyclohexane (γ-HCH), rapid anaerobic biodegradation of γ-HCH to benzene and chlorobenzene was observed. Enrichment cultures were developed and subsequently transferred to an anaerobic sulfate-free HEPES buffered medium without loss of γ-HCH dechlorination, thus suggesting γ-HCH undergoes anaerobic biodegradation via chlororespiration. The overall objective of this thesis was to further characterize the enrichment culture.
To do so, one specific objective was to determine the effect of vancomycin on γ-HCH in an enrichment culture grown in a sulfate-free HEPES buffered medium using hydrogen as the electron donor. This objective would …
Effects Of Immersion On Spatial Updating In Virtual Panoramas, Phillip Napieralski
Effects Of Immersion On Spatial Updating In Virtual Panoramas, Phillip Napieralski
All Theses
An experiment was conducted to examine the effects of immersion on a common spatial knowledge acquisition task in a virtual panoramic environment. A virtual panorama, such as Google Streetview, is an environment that is comprised of 3D (spherical) images taken at regular intervals in a real world setting. Participants navigated the National Mall area of Washington DC in Google Streetview panoramas using either a keyboard and mouse or a head-mounted display (HMD) with a head orientation tracker. In an exploration phase, participants were asked to navigate and observe landmarks. Then, in a testing phase, participants were asked to look in …
Clemson Commencement Program, May 2012, Clemson University
Clemson Commencement Program, May 2012, Clemson University
Clemson Commencement Programs
No abstract provided.
When Time Stops, Andrew Mathas
When Time Stops, Andrew Mathas
All Theses
This creative thesis is a collection of three short stories centered on exploring modern war and military life in Afghanistan. This collection engages in questions of truth, death, and what it means to live on the fringe of a modern warzone. War is a test of the human condition on both soldiers and civilians, the results of which are often impossible to comprehend. In examining that kind of an environment, I am giving voice to stories often forgotten or overlooked during war — stories that need to be heard if we are to have any hope of understanding our actions …
Slave Housing: In Search Of Endangered Architecture, Syra V. Valiente
Slave Housing: In Search Of Endangered Architecture, Syra V. Valiente
All Theses
Although enslaved Africans constituted a significant majority of the population of Charleston County, South Carolina, from the early eighteenth century until the Civil War, only miniscule number of former slave houses survive. Intense analysis of the surviving slave houses at McLeod Plantation on James Island raises questions about what inherent aspects of their plan and construction constitutes what this study labels 'slave architecture.' The emergence, development and decline of slave houses reflects the broader history of slavery in the South Carolina Lowcountry and suggests that improved documentation of these rare buildings can play an important role in conveying the history …
The Application Of Food Landscape In Johns De La Howe School, Shuowei Qin
The Application Of Food Landscape In Johns De La Howe School, Shuowei Qin
All Theses
Recently, food landscape has been put forward under ecological urbanism. Most of our food in the plate comes from miles away and transporting them consumes large amount non-renewable energy in earth. At the same time, our existing landscape suffers from the land degrading because of old ecological paradigm. Food landscape encourages combining edible plants in our landscape and works under new ecological paradigm which could best address those two main problems. Food landscape is a newly coined word and does not have a specific definition. From intensive literature review, the origin, the rationale, and the benefits of food landscape will …