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Detection Of Antibiotic Resistance Clostridium Difficile In Lettuce, Yi Han Jan 2016

Detection Of Antibiotic Resistance Clostridium Difficile In Lettuce, Yi Han

LSU Master's Theses

Clostridium difficile (C. difficile) is regarded as the major cause of infectious diarrhea in humans after antimicrobial treatment. C. difficile has been reported to be widely isolated from food animals and meat. The main purpose of this study was to characterize C. difficile isolates from retail fresh vegetable (lettuce), test the antibiotic-resistance property using five common clinical-selected antibiotics (metronidazole, vancomycin, clindamycin, erythromycin, and cefotaxime). Lettuces (grown in California, Arkansas, and Louisiana) were purchased from retail stores. Toxigenic C. difficile was isolated from 13.8% (41/297) of the lettuce samples. Among the toxigenic isolates, 82.9% (34/41) only produce toxin B, and 17.1% …

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Cockroaches (Blattodea) Of Southern Louisiana: Morphology, Diversity, And Life Histories, Forest Brady Huval Jan 2016

Cockroaches (Blattodea) Of Southern Louisiana: Morphology, Diversity, And Life Histories, Forest Brady Huval

LSU Master's Theses

The state of Louisiana has both temperate and subtropical climates and includes six ecoregions. Two ecoregions in south-central Louisiana were surveyed for members of the order Blattodea to better describe the diversity, life histories, and taxonomy of adult and nymphal cockroaches. Blattodea, excluding the newly included epifamily Termitoidae, is an understudied order of insects in spite of the importance species that are infamous peridomestic pest. The order Blattodea currently contains 9 families comprising of 460 genera. There are approximately 7570 described species 4641 of which are cockroaches and 2929 are termites. Complete information on life histories lacks for the majority …

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In Vitro Investigation On Therapeutic Potential Of Juglone, A Naphthoquinone From Walnuts Against Pancreatic Cancer, Namrata Karki Jan 2016

In Vitro Investigation On Therapeutic Potential Of Juglone, A Naphthoquinone From Walnuts Against Pancreatic Cancer, Namrata Karki

LSU Doctoral Dissertations

Juglone, a naphthoquinone found in Juglandaceae family, which includes black walnut, European walnut, and butter nut possess various biological activities. The anti-cancer properties of juglone has been reported; however, the effect of juglone in pancreatic cancer (PC) has not been elucidated yet. PC is an aggressive lethal, highly metastatic disease associated with poor prognosis and high mortality rate. PC is usually diagnosed in advanced stage and chemotherapy is provided as a first line of treatment. The de novo chemoresistance that develops with chemotherapeutic treatment creates a critical need for identification of novel therapeutic agents for effectively targeting the disease. The …

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The Role Of Upper Ocean Heat Content And Sea Surface Temperature On Northeast Pacific Hurricane Evolution During Average And Active Years, Victoria Lauren Ford Jan 2016

The Role Of Upper Ocean Heat Content And Sea Surface Temperature On Northeast Pacific Hurricane Evolution During Average And Active Years, Victoria Lauren Ford

LSU Master's Theses

Upon comparison to typical neutral-ENSO conditions in the Northeast Pacific Ocean, the 2014 hurricane season has been identified as highly anomalous in both tropical cyclone frequency and intensity. This thesis seeks to investigate the influence of sea surface temperatures (SSTs) and upper ocean heat content (UOHC), defined as the excess of heat present above 26°C, upon the upper ocean thermal structure, mesoscale features, and anomalies that led to an active hurricane season in the Northeast Pacific. The 2012 Northeast Pacific hurricane season was selected as a ‘normal’ season to fully quantify the anomalous 2014 hurricane season. Data sets utilized in …

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Investigating Species And Population Level Foraging Variation And Individual Specialization In Pygoscelis Penguins Using Stable Isotope Analysis, Rachael W. Herman Jan 2016

Investigating Species And Population Level Foraging Variation And Individual Specialization In Pygoscelis Penguins Using Stable Isotope Analysis, Rachael W. Herman

LSU Master's Theses

Gentoo Penguins (Pygoscelis papua) are known to be generalist foragers, while Adélie (P. adeliae) and Chinstrap (P. Antarctica) tend to specialize on krill within the Western Antarctic Peninsula and South Shetland Islands, particularly during the breeding season. However, little is known on temporal consistency in diet and foraging habitat of these species, particularly at the individual level. We used stable isotope analysis (SIA) of blood and feathers to evaluate seasonal and individual foraging consistency within Adélie, Chinstrap and Gentoo Penguins breeding in the South Shetland Islands, as well as among three Gentoo Penguins’ populations in the Western Antarctic Peninsula and …

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A Review Of The Dominican Cocoa Industry: Determining Advantages And Factors To Improve, Glorianni Viviana Estrella Jan 2016

A Review Of The Dominican Cocoa Industry: Determining Advantages And Factors To Improve, Glorianni Viviana Estrella

LSU Master's Theses

Cocoa is one of the commodities with great tradition and consumption around the world. The cocoa industry produces billions of dollars at the global level and contributes significantly to the employment of thousands of people in the countries that have acquired relevant consumption habits as well as in developing countries that produce cocoa. The Dominican Republic has been blessed and belongs to the latter group. It is the top ninth producing country worldwide and the second of the Americas. The DR has been exporting over 50,000 metric tons of cocoa per year for the past twelve years, which is destined …

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Fabrication And Characterization Of Thiol-Acrylate Based Polymer For Bone Tissue Engineering Application, Anoosha Forghani Jan 2016

Fabrication And Characterization Of Thiol-Acrylate Based Polymer For Bone Tissue Engineering Application, Anoosha Forghani

LSU Master's Theses

Thiol-acrylate materials have been demonstrated to have therapeutic potential as biocompatible scaffolds for bone tissue regeneration due to their osteoconductivity, biodegradability, and well-suited mechanical properties. This study connects the mechanical properties and stability of thiol-acrylate polymer with cell adhesion and proliferation of human adipose derived stromal cells. The polymer presented in this study, trimethylolpropane ethoxylate triacrylate-co-trimethylolpropane tris (3-mercaptopropionate) (TMPeTA-co-TMPTMP), was synthesized by an amine-catalyzed Michael addition reaction. Physical, mechanical, and chemical characterizations were performed on the polymeric scaffold, followed by preliminary in vitro cytocompatibility tests. Live/dead staining assays showed significant differences in cell adhesion for TMPeTA (692 and 912 MW). …

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Dietary Plant Lectins May Be An ‘Unknown Etiology’ In Parkinson’S Disease And Dietary Bioactive Compounds Affect Lifespan And Fat Storage Aspects Of Caenorhabditis Elegans, Mingming Wang Jan 2016

Dietary Plant Lectins May Be An ‘Unknown Etiology’ In Parkinson’S Disease And Dietary Bioactive Compounds Affect Lifespan And Fat Storage Aspects Of Caenorhabditis Elegans, Mingming Wang

LSU Doctoral Dissertations

Dietary bioactive compounds benefit health while some might induce pathological processes. Parkinson’s disease (PD) is the second most common neurodegenerative disease. Braak and Hawkes hypothesized that the gastrointestinal tract may be a potential site of neuronal invasion by an “unknown pathogen” leading to some Parkinsonism. Neurotoxin botulinum or ricin can trans-synaptically transport in nervous system. Our hypothesis 1: dietary plant lectins might be responsible for the “unknown pathogen” causing PD. Pomegranate juice (PJ) have antioxidant and anti-obesity effects. Our hypothesis 2: PJ increases lifespan in C. elegans and reduces fat storage. Study 1: Post-feeding rhodamine or TRITC tagged dietary lectins …

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Design And Implementation Of Qcm Virtual Sensing Schemes For Analyses Of Volatile Organic Compounds, Nicholas Colby Speller Jan 2016

Design And Implementation Of Qcm Virtual Sensing Schemes For Analyses Of Volatile Organic Compounds, Nicholas Colby Speller

LSU Doctoral Dissertations

Sensor arrays have evolved as powerful approaches for providing detection and discrimination of volatile organic compounds (VOCs) as required across numerous analytical applications. Such systems typically comprise a number of cross reactive sensor elements, which generate analyte specific response patterns upon exposure to VOCs, and are known as multisensor arrays. When evaluated using statistical methods, these response patterns facilitate classification of VOCs. As an alternative, a single dynamically operated sensor could also be used to generate analyte specific response patterns. This approach is known as a virtual sensor array (VSA) and can exhibit significant advantages when compared to MSAs. Some …

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Building A Community Of Writers Through Free Writing, Reflection, And Collaboration, Adrienne Renee Tate Jan 2016

Building A Community Of Writers Through Free Writing, Reflection, And Collaboration, Adrienne Renee Tate

LSU Master's Theses

This teacher-research project was implemented into a sophomore English Language Arts classroom in order to examine free writing as a writing strategy to encourage students’ interactions and cultivate community. The researcher wanted to discover if free writing was a strategy English teachers can implement to encourage collaboration and community amongst his or her students. This study was conducted approximately for one semester in an English II honors class in southern region of the United States. This project used a mixed-methods approach to determine if free writing is a strategy to encourage students’ interactions and cultivate community. To determine the effectiveness …

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Ecological Assembly Of Leaf-Litter Anuran Communities Across A Neotropical Land-Bridge Archipelago, Sandra Patricia Galeano Munoz Jan 2016

Ecological Assembly Of Leaf-Litter Anuran Communities Across A Neotropical Land-Bridge Archipelago, Sandra Patricia Galeano Munoz

LSU Doctoral Dissertations

The conspicuous variation in time and space of richness and composition of biological communities has intrigued ecologists for decades. In this dissertation, I explore the patterns and ecological mechanisms that underlie the community assembly of leaf-litter anurans on a Neotropical archipelago. I combined experimental and observational approaches to: first, identify patterns of body size variation in leaf-litter anurans; second, assess how coloration and body size variation in a territorial and common species, Oophaga pumilio, associates with aggressiveness and dominance, and how this association influences the outcome of species interactions; and third, examine species co-occurrence and body size overlap patterns, assessing …

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Quantitative Oil Source-Fingerprinting Techniques And Their Application To Differentiating Crude Oil In Coastal Marsh Sediments, Buffy Marie Meyer Jan 2016

Quantitative Oil Source-Fingerprinting Techniques And Their Application To Differentiating Crude Oil In Coastal Marsh Sediments, Buffy Marie Meyer

LSU Doctoral Dissertations

Oil source-fingerprinting is an environmental forensics technique that uses analytical chemistry to determine the origin of oil residues in environmental samples by comparison to a known or suspected source oil. Currently, the only standardized method for oil source fingerprinting is a qualitative approach that is very effective in almost every oil spill response situation. However, the need for quantitative oil source-fingerprinting methods to complement the qualitative determinations is extremely desired. The research herein aims to utilize data generated by gas chromatography/mass spectrometry (GC/MS) methodologies to test two different quantitative techniques: diagnostic biomarker ratio analysis and chemometrics. The most common crude …

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Modeling Relationships Among Affective Measures Of Food Choice: Acceptance, Emotions And Satisfaction, Wisdom Wardy Jan 2016

Modeling Relationships Among Affective Measures Of Food Choice: Acceptance, Emotions And Satisfaction, Wisdom Wardy

LSU Doctoral Dissertations

The importance of ascertaining holistic product and consumer understanding beyond liking in the product development process cannot be overstated. This research investigated the role of attribute performance on satisfaction in explaining the relationship between food-evoked emotions and sensory preferences, and examined factors influencing the sensory-emotion profile of food products. In the first phase of this research, a series of consumer studies were conducted using eggs as a test product. First, the extent to which critical product attributes contribute to the satisfaction of quality requirements and purchase intent was determined using Kano modeling concepts. The emotional profile of the product was …

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Molecular Simulation Study Of Oil Hydrocarbons, Dispersants And Other Organics In Atmospheric Air/Water Interfaces, Zenghui Zhang Jan 2016

Molecular Simulation Study Of Oil Hydrocarbons, Dispersants And Other Organics In Atmospheric Air/Water Interfaces, Zenghui Zhang

LSU Doctoral Dissertations

The main objective of this dissertation is to study the interfacial properties of organic contaminants, in particular green leaf volatiles (GLVs), oil hydrocarbons [mainly intermediate-volatile organic compounds (IVOCs) and semi-volatile organic compounds (SVOCs)], as well as surfactant species (i.e. DOSS and Span 80) from Corexit dispersants at atmospheric air/water and air/seawater interfaces. All these compounds can significantly contribute to the formation of secondary organic aerosols (SOAs). Furthermore, our simulation work on IVOCs, SVOCs and Corexit surfactants, combining with experiments from the Valsaraj group, suggests that these compounds can be adsorbed on the surface of seawater droplets and aerosolized into the …

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Effects Of Landscape Fragmentation On Land Loss, Weijia Cheng Jan 2016

Effects Of Landscape Fragmentation On Land Loss, Weijia Cheng

LSU Master's Theses

Coastal Louisiana, the seventh largest delta on earth, is one of the most vulnerable coastal areas in the United States of America (USA) because of its land loss problem. Coastal land loss is usually caused by many complicated factors. With the rapid increase in human activities, more studies on land loss have focused on the anthropogenic elements, but less on the pattern of the landscape. It is expected that the type of spatial arrangement, such as high degree of fragmentation, would affect the degree of land erosion. A quantitative evaluation of coastal landscape fragmentation and its influences on land loss …

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Phylogeography Of Oculina Corals And Their Algal Symbionts: Insights Into The Origin And Expansion Of Oculina Patagonica In The Mediterranean, Karine Eliane Posbic Leydet Jan 2016

Phylogeography Of Oculina Corals And Their Algal Symbionts: Insights Into The Origin And Expansion Of Oculina Patagonica In The Mediterranean, Karine Eliane Posbic Leydet

LSU Doctoral Dissertations

In a world of rapidly changing environmental conditions, species must effectively respond to their changing habitat or risk extinction. The goal of my dissertation is to elucidate the origins and mechanisms underlying the recent successful population expansion of the invasive coral Oculina patagonica in the Mediterranean Sea. To do this, I have utilized nuclear markers and next-generation sequencing data for the coral host and its algal symbiont as well as environmental data. Although only recently first described from the waters of the Mediterranean, genetic, historical demographic, and fossil evidence suggests that O. patagonica has not been anthropogenically introduced from the …

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Role Of An Adenylyl Cyclase Isoform In Alcohol's Effect On Cyclic Amp Regulated Gene Expression In Mammalian Cells, Rebecca Ann Hill Jan 2016

Role Of An Adenylyl Cyclase Isoform In Alcohol's Effect On Cyclic Amp Regulated Gene Expression In Mammalian Cells, Rebecca Ann Hill

LSU Doctoral Dissertations

Research suggests that the cyclic AMP (cAMP) signaling pathway including CREB-CRE regulated expression of various genes is implicated in the predisposition to and development of alcoholism in humans. Alcohol also induces changes in inflammatory and immune responses; these changes increase the incidence of pneumonias and other infections, which can negatively affect recovery from infections. Cyclic AMP (cAMP) is known for its immunosuppressive effects and is also required for proper development of the immune system. Previous work in our laboratory has demonstrated that ethanol enhances the activity of adenylyl cyclase (AC) in an isoform-specific manner; type 7 AC (AC7) is most …

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Yy1 Gene Dosage Effect And Allele-Specific Expression Analysis Of Peg3, Bambarendage Pinithi Upekka Perera Jan 2016

Yy1 Gene Dosage Effect And Allele-Specific Expression Analysis Of Peg3, Bambarendage Pinithi Upekka Perera

LSU Doctoral Dissertations

Genomic imprinting is a mechanism that targets epigenetic modifications to regulate gene transcription to express a gene from only one of its two parental alleles. Imprinted genes are typically clustered together and are involved in developmental regulation of the fetus. The paternally expressed gene 3 (Peg3) domain represents one such imprinted gene cluster involved in fetal growth regulation and maternal caring behavior. The transcription and imprinting control of the Peg3 domain requires the transcription factor Yin-Yang 1 (YY1), a protein that plays important roles throughout development. The first part of this work explores evidence for the hypothesis that half a …

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Integration Of Optical Remote Sensor-Based Yield Prediction And Impact Of Nitrogen Fertilization, Harvest Date, And Planting Scheme On Yield, Quality, And Biomass Chemical Composition In Energy Cane Production In Louisiana, Marilyn Sebial Dalen Jan 2016

Integration Of Optical Remote Sensor-Based Yield Prediction And Impact Of Nitrogen Fertilization, Harvest Date, And Planting Scheme On Yield, Quality, And Biomass Chemical Composition In Energy Cane Production In Louisiana, Marilyn Sebial Dalen

LSU Doctoral Dissertations

The established sugarcane industry in Louisiana is perceived as an advantage for biofuel industry because of the similarities of energy cane and sugarcane by way they are cultivated, harvested, and processed. This study was conducted at the LSU AgCenter Sugar Research Station in St. Gabriel, LA from 2013-2015 to evaluate the influence of planting scheme, N rate, and harvest date on energy cane yield, quality parameters, nutrient uptake, and biomass chemical composition. The relationship of vegetation indices (VI) with stalk, fiber yield, and N uptake of energy cane harvested at different dates was also evaluated. The experiments consisted of variety …

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Fundamental Studies Of Humic Acid's Influence On Pollutant Toxicity To Aquatic Organisms, Rachel Dawn Deese Jan 2016

Fundamental Studies Of Humic Acid's Influence On Pollutant Toxicity To Aquatic Organisms, Rachel Dawn Deese

LSU Doctoral Dissertations

The main purpose of the research presented in this dissertation was to further understand the intricate and convoluted interactions between natural organic material, biological entities, and pollutants. This was achieved by utilizing humic acids (HAs) from differing sources, chemically modified humic acid, two biological entities (model biomembranes and Artemia Franciscana), and three types of pollutants (cations, surfactants, and carbon nanotubes). Fluorescence spectroscopy and model biomembranes were used to measure the change in HA’s ability to interact with the biomembranes in the presence of cations. Three differently sourced HAs, chemical modified HAs, and a range of cations were studied to elucidate …

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The Mnemonic Maid: Joan Of Arc In Public Memory, Tara Beth Smithson Jan 2016

The Mnemonic Maid: Joan Of Arc In Public Memory, Tara Beth Smithson

LSU Doctoral Dissertations

This dissertation examines the relationship between Joan of Arc, postcolonial identity, and public memory. Since her repopularization in the nineteenth century, Joan of Arc has become one of the most emblematic figures of French history. Commemorated in public statuary, celebrated by writers, and championed by politicians, la Pucelle’s story is tantamount to national myth. While Joan of Arc’s centrality to France’s iconic imagining of itself during the spread of its empire has received much critical attention, her postcolonial afterlife remains understudied. This project offers a counterpoint to the prevailing assumption that Joan of Arc has few implications for postcolonial studies …

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Metabolic Preconditioning Of Mammalian Cells: Approaches For Increasing Biostability After Desiccation, Apurva Shrihari Borcar Jan 2016

Metabolic Preconditioning Of Mammalian Cells: Approaches For Increasing Biostability After Desiccation, Apurva Shrihari Borcar

LSU Doctoral Dissertations

Selected species in nature are able to tolerate prolonged periods of severe water stress. Survival of cellular desiccation in these anhydrobiotic organisms is conferred by a number of mechanisms including accumulation of stabilizing solutes, such as trehalose, and expression of Late Embryogenesis Abundant (LEA) proteins. An additional feature shared by some anhydrobiotic animals is the capacity to suppress mitochondrial oxidative phosphorylation in preparation for desiccation. These mechanisms improve the physiological robustness of cells to stress. The primary aim of this dissertation is to evaluate forms of metabolic preconditioning and to test the most propitious as a means to improve desiccation …

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Temporal Dynamics Of Benthic Responses To Habitat Disturbance In Coastal Plain Headwaters Of Southwestern Louisiana, Catherine Elizabeth Murphy Jan 2016

Temporal Dynamics Of Benthic Responses To Habitat Disturbance In Coastal Plain Headwaters Of Southwestern Louisiana, Catherine Elizabeth Murphy

LSU Doctoral Dissertations

Weak biotic responses to habitat gradients within Northern Gulf of Mexico streams have been attributed to spatial and temporal variability. Landscape and in-stream habitat descriptions are presented for watersheds within Pleistocene terraces of the Coastal Plains geomorphic province of Louisiana, USA. Geologic influences on stream habitat were inferred by comparing multivariate ordinations on physicochemical measurements between terraces. Seasonal variability was assessed during a drought year (2011) and a typical water year (2013). Within coastal plains of Louisiana, stream condition was more similar within terraces than within river basins. Permutational MANOVA models indicated significantly different stream habitat between Uplands and Prairie, …

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A Conductor's Analysis Of Poetry And Music In J. A. C. Redford's Antiphons, Brenda Lowe Rudd Jan 2016

A Conductor's Analysis Of Poetry And Music In J. A. C. Redford's Antiphons, Brenda Lowe Rudd

LSU Doctoral Dissertations

J. A. C. Redford’s Antiphons is a reverent and mystically beautiful, choral song cycle, consisting of seven settings and written for a cappella divisi mixed chorus. Based on texts originating from the seven, ancient Great O Antiphons, each of Redford’s settings interweave the original antiphon text with one of seven Advent sonnets written by English poet-priest, Malcolm Guite. The texts of the Great O Antiphons coincide with the seven verses of the familiar Advent hymn, “O Come, O Come Emmanuel.” This study contains a brief history and a comprehensive textual analysis of the ancient antiphons, an in-depth textual analysis of …

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Understanding Chemical Reactions In Novel Materials: From Metal Organic Frameworks To Oxyallyl Cations, Kiara Taylor-Edinbyrd Jan 2016

Understanding Chemical Reactions In Novel Materials: From Metal Organic Frameworks To Oxyallyl Cations, Kiara Taylor-Edinbyrd

LSU Doctoral Dissertations

The work of this dissertation investigates the chemical processes of novel materials through quantum mechanical calculations and molecular dynamics simulations. The first section of this work focuses on probing copper based metal organic frameworks (MOFs) for their ability to catalytically release nitric oxide from s-nitrosothiol (RSNO) precursors in a slow, controlled and sustained manner and compares these findings to a free copper ion/ethanol solution. Through the use of electronic structure calculations and molecular dynamics simulations, studies are carried out to better understand how the barriers of RSNOs approach to the catalytic copper center changes with modifications to the R-group (of …

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Infectivity And Physiological Effects Of White Spot Syndrome Virus (Wssv) In Farmed Louisiana Red Swamp Crayfish (Procambarus Clarkii), Barcley Talon Pace Jan 2016

Infectivity And Physiological Effects Of White Spot Syndrome Virus (Wssv) In Farmed Louisiana Red Swamp Crayfish (Procambarus Clarkii), Barcley Talon Pace

LSU Master's Theses

The red swamp crayfish, Procambarus clarkii, represents an important aquaculture species responsible for over half of all commercial aquaculture profits in Louisiana. White spot syndrome virus (WSSV) is highly pathogenic and induces mass mortality in crustacean aquaculture operations worldwide. Crayfish lack the adaptive ability of the vertebrate immune system, and must depend on primitive, innate immune responses to combat viral infections. This study aims to investigate the dose-response of WSSV in P. clarkii and to examine viral-host interactions by examining the biochemical and immunological changes induced by WSSV infection in this species. Viable viral particles were isolated from naturally infected …

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Development Of Functional Markers For Resistance To Leaf Scald In Sugarcane, Andres Felipe Gutierrez Viveros Jan 2016

Development Of Functional Markers For Resistance To Leaf Scald In Sugarcane, Andres Felipe Gutierrez Viveros

LSU Doctoral Dissertations

Leaf scald, caused by Xanthomonas albilineans, is a major sugarcane disease worldwide. The disease is managed primarily with resistant cultivars obtained through classical breeding; however, the erratic symptom expression hinders the reliability and reproducibility of the selection process. The development of molecular markers associated with incompatible/compatible reaction can overcome this limitation. Suppression subtractive hybridization (SSH) and quantitative trait locus (QTL) mapping were the strategies used to find leaf scald resistance-associated genes and molecular markers in sugarcane. SSH results showed that genes involved in signal perception and transduction, and DNA binding, were highly expressed in the resistant clone LCP 85-384 compared …

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Effects Of Glyphosate On Soybean Nutrition, Endophytic Colonization By Cercospora Cf. Flagellaris And Development Of Cercospora Leaf Blight, Teddy Garcia Aroca Jan 2016

Effects Of Glyphosate On Soybean Nutrition, Endophytic Colonization By Cercospora Cf. Flagellaris And Development Of Cercospora Leaf Blight, Teddy Garcia Aroca

LSU Master's Theses

Glyphosate (Roundup®, Monsanto, Inc., St. Louis, MO) is the most widely used herbicide in the world because of its broad spectrum and its efficacy in controlling annual broadleaf weeds and undesired grasses. The effect of glyphosate on mineral nutrition and plant diseases has been an important topic during the past decade, because of its controversial effects on plant mineral nutrition. In order to test the hypothesis that glyphosate affects soybean mineral nutrition, and therefore predisposes soybean to Cercospora leaf blight, six glyphosate-resistant (GR) soybean varieties were either not treated or treated with glyphosate in field experiments. Plants were then evaluated …

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Inmate Populations In A Disaster: A Labor Force, A Vulnerable Population, And A Hazard, Jordan Carlee Smith Jan 2016

Inmate Populations In A Disaster: A Labor Force, A Vulnerable Population, And A Hazard, Jordan Carlee Smith

LSU Master's Theses

Within the disaster literature, few studies have been devoted to the role of incarcerated populations as a source of labor within the context of emergency operations. When faced with a lack of resources, emergency management rely on inmate labor forces to prepare for and respond to hazards and disasters. In the U.S., inmates from the Louisiana State Penitentiary helped with sandbagging the facilities in preparing for the potentially flooding of the Mississippi River and Hurricane Katrina (Gaillard, 2012). The state of California has long maintained inmate firefighting forces to combat destructive wildfires statewide (Goodman, 2012). However, there has never been …

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Characterization Of Sulfur Chemistry In Louisiana Coastal Wetland Soils Using X-Ray Absorption Fine Structure (Xafs) Spectroscopy, Negar Dehghani Tafti Jan 2016

Characterization Of Sulfur Chemistry In Louisiana Coastal Wetland Soils Using X-Ray Absorption Fine Structure (Xafs) Spectroscopy, Negar Dehghani Tafti

LSU Master's Theses

Sulfur is one of the most abundant elements in the environment, which plays a vital role in the growth and functioning of plants and microorganisms. It is found in an extended variety of species in gases, liquid, and solid forms and present in various nature systems. Wetlands are one of the largest global sinks/sources of sulfur. Being existing in a variety of oxidation states, sulfur contributes to biogeochemical cycles of coastal wetlands through involving in humification processes as well as influence on metal sulfide formation and consequently, methanogenesis and greenhouse gas emission. In this study, we have evaluated sulfur chemistry …

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