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A Resistant-Starch Enriched Yogurt: Fermentability, Sensory Characteristics, And A Pilot Study In Children, Frank Greenway, Jolene Zheng, Kayanush Aryana, Nikhil Dhurandhar, Richard Tulley, John Finley, Michael Keenan, Roy Martin, Christine Pelkman, Douglas Olson Jan 2015

A Resistant-Starch Enriched Yogurt: Fermentability, Sensory Characteristics, And A Pilot Study In Children, Frank Greenway, Jolene Zheng, Kayanush Aryana, Nikhil Dhurandhar, Richard Tulley, John Finley, Michael Keenan, Roy Martin, Christine Pelkman, Douglas Olson

Faculty Publications

The rising prevalence of obesity and the vulnerability of the pediatric age group have highlighted the critical need for a careful consideration of effective, safe, remedial and preventive dietary interventions. Amylose starch (RS2) from high-amylose maize (HAM) ferments in the gut and affects body weight. One hundred and ten children, of 7-8 (n=91) or 13-14 (n=19) years of age scored the sensory qualities of a yogurt supplemented with either HAM-RS2 or an amylopectin starch. The amylopectin starch yogurt was preferred to the HAM-RS2-enriched yogurt by 7-8 year old panelists (P<0.0001). Appearance, taste, and sandiness scores given by 13- to 14-year-old panelists were more favorable for the amylopectin starch yogurt than for HAM-RS2-enriched yogurt (P<0.05). HAM-RS2 supplementation resulted in acceptable (≥6 on a 1-9 scale) sensory and hedonic ratings of the yogurt in 74% of subjects. Four children consumed a HAM-RS2-enriched yogurt for four weeks to test its fermentability in a clinical trial. Three adolescents, but not the single pre-pubertal child, had reduced stool pH (P=0.1) and increased stool short-chain fatty acids (SCFAs) (P<0.05) including increased fecal acetate (P=0.02), and butyrate (P=0.089) from resistant starch (RS) fermentation and isobutyrate (P=0.01) from protein fermentation post-treatment suggesting a favorable change to the gut microbiota. HAM-RS2 was not modified by pasteurization of the yogurt, and may be a palatable way to increase fiber intake and stimulate colonic fermentation in adolescents. Future studies are planned to determine the concentration of HAM-RS2 that offers the optimal safe and effective strategy to prevent excessive fat gain in children.

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In Vitro And In Vivo Characterization Of Pentaerythritol Triacrylate-Co-Trimethylolpropane Nanocomposite Scaffolds As Potential Bone Augments And Grafts, Cong Chen, Leah Garber, Mollie Smoak, Carmel Fargason, Thomas Scherr, Caleb Blackburn, Sasha Bacchus, Mandi J. Lopez, John A. Pojman, Fabio Del Piero, Daniel J. Hayes Jan 2015

In Vitro And In Vivo Characterization Of Pentaerythritol Triacrylate-Co-Trimethylolpropane Nanocomposite Scaffolds As Potential Bone Augments And Grafts, Cong Chen, Leah Garber, Mollie Smoak, Carmel Fargason, Thomas Scherr, Caleb Blackburn, Sasha Bacchus, Mandi J. Lopez, John A. Pojman, Fabio Del Piero, Daniel J. Hayes

Faculty Publications

© 2015 Mary Ann Liebert, Inc. A thiol-Acrylate-based copolymer synthesized via an amine-catalyzed Michael addition was studied in vitro and in vivo to assess its potential as an in situ polymerizing graft or augment in bone defect repair. The blends of hydroxyapatite (HA) with pentaerythritol triacrylate-co-trimethylolpropane (PETA), cast as solids or gas foamed as porous scaffolds, were evaluated in an effort to create a biodegradable osteogenic material for use as a bone-void-filling augment. Osteogenesis experiments were conducted with human adipose-derived mesenchymal stromal cells (hASCs) to determine the ability of the material to serve as an osteoinductive substrate. Poly(É-caprolactone) (PCL) composites …

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Trends And Spatial Variability In Dry Spells Across The South-Central United States, Jill C. Trepanier, Michael J. Roberts, Barry D. Keim Jan 2015

Trends And Spatial Variability In Dry Spells Across The South-Central United States, Jill C. Trepanier, Michael J. Roberts, Barry D. Keim

Faculty Publications

Annual average and maximum spells with no precipitation in the southern United States are analyzed. In this study, dry spells are defined as consecutive days with no measurable rainfall. The study area includes 70 weather stations in Texas, Oklahoma, Louisiana, Arkansas, Mississippi, and Tennessee. Interarrival times between daily precipitation records for each station provide the data for this analysis. All 70 stations were analyzed from 1950 to 2013. Six stations that each have data for more than 100 years were analyzed for the period from 1908 to 2013. Approximately 25% of stations in the region show significant negative trends through …

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The Ubiquitin Ligase Siah2 Regulates Obesity-Induced Adipose Tissue Inflammation, Gail Kilroy, Lauren E. Carter, Susan Newman, David H. Burk, Justin Manuel, Andreas Möller, David D. Bowtell, Randall L. Mynatt, Sujoy Ghosh, Z. Elizabeth Floyd Jan 2015

The Ubiquitin Ligase Siah2 Regulates Obesity-Induced Adipose Tissue Inflammation, Gail Kilroy, Lauren E. Carter, Susan Newman, David H. Burk, Justin Manuel, Andreas Möller, David D. Bowtell, Randall L. Mynatt, Sujoy Ghosh, Z. Elizabeth Floyd

Faculty Publications

© 2015 The Obesity Society. Objective Chronic, low-grade adipose tissue inflammation associated with adipocyte hypertrophy is an important link in the relationship between obesity and insulin resistance. Although ubiquitin ligases regulate inflammatory processes, the role of these enzymes in metabolically driven adipose tissue inflammation is relatively unexplored. Herein, the effect of the ubiquitin ligase Siah2 on obesity-related adipose tissue inflammation was examined. Methods Wild-type and Siah2KO mice were fed a low- or high-fat diet for 16 weeks. Indirect calorimetry, body composition, and glucose and insulin tolerance were assayed along with glucose and insulin levels. Gene and protein expression, immunohistochemistry, adipocyte …

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Reciprocal Osmotic Challenges Reveal Mechanisms Of Divergence In Phenotypic Plasticity In The Killifish Fundulus Heteroclitus, Reid S. Brennan, Fernando Galvez, Andrew Whitehead Jan 2015

Reciprocal Osmotic Challenges Reveal Mechanisms Of Divergence In Phenotypic Plasticity In The Killifish Fundulus Heteroclitus, Reid S. Brennan, Fernando Galvez, Andrew Whitehead

Faculty Publications

© 2015. Published by The Company of Biologists Ltd. The killifish Fundulus heteroclitus is an estuarine species with broad physiological plasticity, enabling acclimation to diverse stressors. Previous work suggests that freshwater populations expanded their physiology to accommodate low salinity environments; however, it is unknown whether this compromises their tolerance to high salinity.We used a comparative approach to investigate the mechanisms of a derived freshwater phenotype and the fate of an ancestral euryhaline phenotype after invasion of a freshwater environment. We compared physiological and transcriptomic responses to high-and low-salinity stress in fresh and brackish water populations and found an enhanced plasticity …

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Bioturbating Animals Control The Mobility Of Redox-Sensitive Trace Elements In Organic-Rich Mudstone, Dario Harazim, Duncan Mcilroy, Nicholas P. Edwards, Roy A. Wogelius, Phillip L. Manning, Kristin M. Poduska, Graham D. Layne, Dimosthenis Sokaras, Roberto Alonso-Mori, Uwe Bergmann Jan 2015

Bioturbating Animals Control The Mobility Of Redox-Sensitive Trace Elements In Organic-Rich Mudstone, Dario Harazim, Duncan Mcilroy, Nicholas P. Edwards, Roy A. Wogelius, Phillip L. Manning, Kristin M. Poduska, Graham D. Layne, Dimosthenis Sokaras, Roberto Alonso-Mori, Uwe Bergmann

Faculty Publications

© 2015 Geological Society of America. Bioturbating animals modify the original mineralogy, porosity, organic content, and fabric of mud, thus affecting the burial diagenetic pathways of potential hydrocarbon source, seal, and reservoir rocks. High-sensitivity, synchrotron rapid scanning X-ray fluorescence elemental mapping reveals that producers of phycosiphoniform burrows systematically partition redox-sensitive trace elements (i.e., Fe, V, Cr, Mn, Co, Ni, Cu, and As) in fine-grained siliciclastic rocks. Systematic differences in organic carbon content (total organic carbon >1.5 wt%) and quality (Δ13Corg~0.6%) are measured between the burrow core and host sediment. The relative enrichment of redox-sensitive elements in the burrow core does …

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Effects Of Milk Replacer And Multivitamin-Mineral Supplementation On Performance Of Heat Stressed Dairy Calves, Steven Joseph Blair Jan 2015

Effects Of Milk Replacer And Multivitamin-Mineral Supplementation On Performance Of Heat Stressed Dairy Calves, Steven Joseph Blair

LSU Master's Theses

Seventy-one Holstein calves were used to evaluate the effects of milk replacer (MR) feeding management alone or in combination with a multivitamin-electrolyte supplement on growth and mitigation of heat stress. Milk replacer treatments consisted of Land O’Lakes Herdmaker Supreme (20% CP, 20% fat) and Land O’Lakes Warm Front (27% CP, 10% fat). Calves received either 0 or 20 ml Palamountains Calf Boost® in MR once daily. Calves were offered treatments beginning on day 4. Calves on 27% CP : 10% fat MR were fed 2.72kg MR twice daily for the first three weeks of life, and 3.86kg twice daily until …

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The Role Of Salience In Second Language Acquisition, Ian South Comeaux Jan 2015

The Role Of Salience In Second Language Acquisition, Ian South Comeaux

LSU Master's Theses

Abstract Cues to the actor role such as word order, noun animacy, case inflection and verb agreement vary in strength across languages. The competition model (CM; MacWhinney, 2005) suggests that adult L2 acquisition is difficult due to differences in cue strength between the native and target languages. Using a paradigm inspired by the CM, the present study examines whether salience plays a role in facilitating adjustments of cue strength during L2 learning. Native English speakers were exposed to an artificial language (via an actor-assignment task) which utilized four different cues: verb agreement, case marking, animacy, and word order. Word order, …

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The Lived Body In Heidegger, Merleau-Ponty And Derrida, Manhua Li Jan 2015

The Lived Body In Heidegger, Merleau-Ponty And Derrida, Manhua Li

LSU Master's Theses

In my thesis, I discuss the accounts of the lived body in Heidegger, Merleau-Ponty and Derrida in terms of the extent to which they succeed as counter-accounts to the Cartesian metaphysical view of the body-object, as well as the limits of each account. I first introduce Descartes’ account of the body as substantiality (res extensa), which isolates the body as the object from its subject, the mind, the “I think” (res cogitans). After contextualizing the body as non-living objectivity in Cartesian metaphysics, I discuss the later Heidegger’s appropriation of the Husserlian notion of the lived body (Leib)—as separate from the …

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Life Cycle Analysis Of An Airlifted Recirculation Aqualculture Facility, Marlon Alberetos Greensword Jan 2015

Life Cycle Analysis Of An Airlifted Recirculation Aqualculture Facility, Marlon Alberetos Greensword

LSU Master's Theses

Airlift-equipped recirculating aquaculture systems (RAS) provide water-circulation, aeration, and degassing efficiently and reliably. This project investigated the need for biofilters in a fish hatchery environment to address biofouling of tank water from hatching eggs. Eggs of various fish species were selected and Biological Oxygen Demand (BOD), total Kjeldahl nitrogen (TKN), and protein loading and content were measured and compared. Means for all samples were: 0.67±0.05g BOD₅/g, 10.89 nitrogen±0.84% and the mean protein content 69.22±3.82%. A statistical analysis indicates that Rachycentron canadum (cobia) and Ictalurus punctatus (channel catfish) is the most representative of the multi-species lot when compared to Balantiocheilus melanopterus …

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Effects Of Oil Spill And Recovery Of Terrestrial Arthropods In Louisiana Saltmarsh Ecosystem, Wokil Bam Jan 2015

Effects Of Oil Spill And Recovery Of Terrestrial Arthropods In Louisiana Saltmarsh Ecosystem, Wokil Bam

LSU Master's Theses

Saltmarshes are under continuous multiple stressors such as, land loss, erosion, climate change, environmental pollutions and oil spills, which affect the ecological communities inhabiting saltmarshes. Terrestrial arthropods play an important role in the ecology of saltmarshes, affecting primary production and decomposition. Arthropods are often found in the gut contents of Seaside Sparrows and fishes making them an important trophic link to terrestrial and marine vertebrates. Insects and spiders have the potential to be a good indicator of overall marsh health and environment as they are differentially sensitive to oil exposure. Oil pollutants may have significant long-term negative impacts on the …

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Population Abundance And Transience Of Selected Coastal Plain Crayfishes, Samantha Lott Jan 2015

Population Abundance And Transience Of Selected Coastal Plain Crayfishes, Samantha Lott

LSU Master's Theses

Crayfish are important for stability, determining ecosystem structure, and ecosystem functions in freshwater habitats. Louisiana has many endemic species of crayfish, but most are poorly described. This study investigated the populations of some of the lesser known crayfishes in the South Central Plains. Specifically, the goals were to examine movement, movement across anthropogenic barriers, and estimate population size of 10 species reported from the area: Procambarus natchitochae, P. vioscai, P. clarkii, P. acutus, P. zonangulus, P. tulanei, P. kensleyi, Orconectes maletae, O. lancifer, and O. palmeri. In combination with a field team, I sampled twelve wadeable streams with DC backpack …

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Evaluating The Effects Of Vacuum Tumbling With Chitosan Nanoparticles And Water-Soluble Chitosan On The Shelf Life Of Cryogenically Frozen Shrimp, Alexander Chouljenko Jan 2015

Evaluating The Effects Of Vacuum Tumbling With Chitosan Nanoparticles And Water-Soluble Chitosan On The Shelf Life Of Cryogenically Frozen Shrimp, Alexander Chouljenko

LSU Master's Theses

Chitosan (CH) is a biopolymer obtained from the deacetylation of chitin, a polysaccharide present in the exoskeleton of crustaceans and cell walls of fungi. Application of CH may be limited by its water-insolubility. It can be dissolved in acids and forms relatively high viscosity solutions. CH solutions have antioxidant and antimicrobial properties. CH penetration into shrimp may be facilitated by vacuum tumbling with low viscosity chitosan-sodium tripolyphosphate (CH-TPP) nanoparticle or water-soluble chitosan (WSC) solutions. It is expected that this would reduce lipid oxidation and microbial loads. In this study, CH-TPP and WSC solutions were developed and applied to shrimp, and …

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Effects Of Minor Elements On Cercospora Kikuchii, Cercospora Leaf Blight And Rust On Soybeans, Brian Michael Ward Jan 2015

Effects Of Minor Elements On Cercospora Kikuchii, Cercospora Leaf Blight And Rust On Soybeans, Brian Michael Ward

LSU Master's Theses

Soybean (Glycine max) is one of the most widely grown crops in the world. Many pathogens attack soybeans, but of particular importance to tropical and subtropical areas such as Louisiana is Cercospora leaf blight (CLB). This disease is caused by the fungus Cercospora kikuchii and favored by high temperatures. This fungus utilizes a toxin, cercosporin, as its primary pathogenicity factor. Soybean rust (SBR), caused by Phakopsora pachyrhizi, is another common disease that occurs in Louisiana under cooler environmental conditions of spring and fall. Both diseases occur regularly in Louisiana and may result in severe yield losses. Cercospora kikuchii has recently …

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Evaluation Of Whey-Protein-Isolate Edible Films Containing Oregano (Origanum Vulgare) Essential Oil To Improve Shelf Life Of Cheeses During Refrigerated Storage, Cristhiam Gurdian Jan 2015

Evaluation Of Whey-Protein-Isolate Edible Films Containing Oregano (Origanum Vulgare) Essential Oil To Improve Shelf Life Of Cheeses During Refrigerated Storage, Cristhiam Gurdian

LSU Master's Theses

Oregano essential oil (OEO) is recognized for antimicrobial and antioxidant properties. Incorporation of OEO into an edible film prepared with whey protein isolate (WPI) may improve the shelf-life of queso blanco (cheese). The overall goal of the proposed study was to develop and evaluate the effectiveness of antimicrobial and antioxidant WPI edible films (WPIFs) with OEO to improve the shelf life of queso blanco wrapped in the WPIFs during one month of refrigerated storage. Production of potential antimicrobial and antioxidant WPIFs with OEO (WPIOF) was possible. Flaxseed oil (FO) was incorporated into cheese by homogenization (HFQ), which caused significant susceptibility …

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Effect Of Specific Feedback On Growth Mindset And Achievement, Erin Elizabeth Gauthreaux Jan 2015

Effect Of Specific Feedback On Growth Mindset And Achievement, Erin Elizabeth Gauthreaux

LSU Master's Theses

Every student has a different mindset, or their own way of viewing challenges and setbacks. The purpose of this study was to determine the effectiveness of a specific feedback intervention on student mindset and achievement in a middle school life science course. Several tests were used to compare the data at the beginning of the school year and at the end of the school year. These tests included mindset, competency in science, attitudes about learning science, and life science content knowledge. The control group was taught by the use of lecture, note-taking, and life science activities. The experimental group was …

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The Effect Of Processing Method Of Distiller's Dried Grains With Solubles On Hen Egg Production, Egg Quality, And Yolk Color, Lindsay Renee Brunet Jan 2015

The Effect Of Processing Method Of Distiller's Dried Grains With Solubles On Hen Egg Production, Egg Quality, And Yolk Color, Lindsay Renee Brunet

LSU Master's Theses

Distiller’s dried grains with solubles (DDGS) is a common byproduct of the ethanol industry and is used in animal feeds. Carotenoids (xanthophylls) are already present in the human eye, and increasing the amount of carotenoids in the eye can help prevent eye diseases. The purpose of this research was to confirm that adding DDGS to standard corn and soybean meal hen diets may increase the amount of lutein available in egg yolks. An experiment was conducted with Hy-Line W-36 hens to evaluate the effects of DDGS in corn-soybean meal diets. Three hundred fifteen hens were fed one of seven treatment …

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Current Uses Of Poly(Lactic-Co-Glycolic Acid) In The Dental Field: A Comprehensive Review, Maria Justina Roxana Virlan, Daniela Miricescu, Alexandra Totan, Maria Greabu, Cristiana Tanase, Cristina M. Sabliov, Constantin Caruntu, Bogdan Calenic Jan 2015

Current Uses Of Poly(Lactic-Co-Glycolic Acid) In The Dental Field: A Comprehensive Review, Maria Justina Roxana Virlan, Daniela Miricescu, Alexandra Totan, Maria Greabu, Cristiana Tanase, Cristina M. Sabliov, Constantin Caruntu, Bogdan Calenic

Faculty Publications

Poly(lactic-co-glycolic acid) or PLGA is a biodegradable polymer used in a wide range of medical applications. Specifically PLGA materials are also developed for the dental field in the form of scaffolds, films, membranes, microparticles, or nanoparticles. PLGA membranes have been studied with promising results, either alone or combined with other materials in bone healing procedures. PLGA scaffolds have been used to regenerate damaged tissues together with stem cell-based therapy. There is solid evidence that the development of PLGA microparticles and nanoparticles may be beneficial to a wide range of dental fields such as endodontic therapy, dental caries, dental surgery, dental …

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Cryopreservation Of Domestic Cat Epididymal Spermatozoa, Jesse Ray Saenz Jan 2015

Cryopreservation Of Domestic Cat Epididymal Spermatozoa, Jesse Ray Saenz

LSU Doctoral Dissertations

The primary lines of defense in preventing any exotic species from becoming endangered or extinct should be the protection of their habitat and from poaching. For wildlife conservationists, these primary measures are often not feasible, and thus cannot be the only means to prevent extinction. The objective of this research was to identify a semen extender that contained little to no egg yolk and could still effectively freeze domestic cat epididymal spermatozoa, for the purpose to sort spermatozoa into X and Y, using flow cytometry. In the first experiment we compared a TesT (Tes + Tris) 20% egg yolk extender …

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Large-Scale Geometric Data Decomposition, Processing And Structured Mesh Generation, Wuyi Yu Jan 2015

Large-Scale Geometric Data Decomposition, Processing And Structured Mesh Generation, Wuyi Yu

LSU Doctoral Dissertations

Mesh generation is a fundamental and critical problem in geometric data modeling and processing. In most scientific and engineering tasks that involve numerical computations and simulations on 2D/3D regions or on curved geometric objects, discretizing or approximating the geometric data using a polygonal or polyhedral meshes is always the first step of the procedure. The quality of this tessellation often dictates the subsequent computation accuracy, efficiency, and numerical stability. When compared with unstructured meshes, the structured meshes are favored in many scientific/engineering tasks due to their good properties. However, generating high-quality structured mesh remains challenging, especially for complex or large-scale …

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A Conductor’S Analysis Of Almeida Prado’S Passion Of Our Lord Jesus Christ According To Saint Mark, Cléusia Carreira Gonçalves Jan 2015

A Conductor’S Analysis Of Almeida Prado’S Passion Of Our Lord Jesus Christ According To Saint Mark, Cléusia Carreira Gonçalves

LSU Doctoral Dissertations

This study is based on the analysis and performance considerations of the Passion of our Lord Jesus Christ According to Saint Mark by the Brazilian composer Almeida Prado (1943-2010). This passion setting, which comprises mixed choir, actors, organ, harpsichord and timpani, was composed in 1967. The setting of the passion story strictly follows the gospel account, and no other poetic text, reflective chorales or arias were added. Among other factors, this work is unique in that the choir is used to carry the narrative throughout the work. Also, the composer masterfully uses text-painting in the choral and instrumental parts in …

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Insights Into The Development Of Chemotherapeutics Targeting Pfkfb Enzymes, Robert Blake Crochet Jan 2015

Insights Into The Development Of Chemotherapeutics Targeting Pfkfb Enzymes, Robert Blake Crochet

LSU Doctoral Dissertations

The PFKFB enzymes control the primary checkpoint in the glycolytic pathway and are implicated in a multitude of diseases: from cancer, to schizophrenia, to diabetes, and heart disease. The inducible isoform, PFKFB3, is known to be associated with the upregulation of glycolysis in many cancers. The first study within this work investigates the potential for using tier-based approaches of virtual screening to target small molecule kinases, with PFKFB3 serving as a case study. For this investigation, bioactive compounds for PFKFB3 were identified from a compound library of 1364 compounds via high-throughput screening, with bioactive compounds being further characterized as either …

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Political Conspiracy In Napoleonic France, Kelly Diane Jernigan Jan 2015

Political Conspiracy In Napoleonic France, Kelly Diane Jernigan

LSU Doctoral Dissertations

An in-depth analysis of primary source material indicates that the conspiracies hatched against Napoleon served as the impetus for his decision to change the government from the Consulate to the Empire. His ambitious personality drove him to achieve as much power and prestige for himself as possible, a point discussed by numerous historians, but the conspiratorial actions designed to strike him down provided the opportunity. He was a master of manipulating situations—and people—in order to achieve his ambitious goals. Knowing that his constituents worried over renewed political turmoil if something happened to him, Napoleon used their fears to strengthen his …

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Seavipers - Computer Vision And Inertial Position Reference Sensor System (Cviprss), Justin Lee Erdman Jan 2015

Seavipers - Computer Vision And Inertial Position Reference Sensor System (Cviprss), Justin Lee Erdman

LSU Doctoral Dissertations

This work describes the design and development of an optical, Computer Vision (CV) based sensor for use as a Position Reference System (PRS) in Dynamic Positioning (DP). Using a combination of robotics and CV techniques, the sensor provides range and heading information to a selected reference object. The proposed optical system is superior to existing ones because it does not depend upon special reflectors nor does it require a lengthy set-up time. This system, the Computer Vision and Inertial Position Reference Sensor System (CVIPRSS, pronounced \nickname), combines a laser rangefinder, infrared camera, and a pan--tilt unit with the robust TLD …

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The Response Of Gossypium Spp. To Biotic And Abiotic Stresses In Louisiana And The Modeling Of Yarn Performance, Bikash Bhandari Jan 2015

The Response Of Gossypium Spp. To Biotic And Abiotic Stresses In Louisiana And The Modeling Of Yarn Performance, Bikash Bhandari

LSU Doctoral Dissertations

Developing improved cotton cultivars depends on how cotton cultivars perform the best when under stresses. Reniform nematode is a major plant pathogen, causing 4-6% yield loss in southern United States. A variation in reproduction and pathogenicity across reniform isolates collected from Louisiana on susceptible cotton was reported. This study was conducted to determine the response of resistant/tolerant cotton genotypes to multiple reniform isolates by inoculating 10,000 juveniles into seven days old seedlings. Across genotypes, the Evan and Avoyelles isolates had significantly higher vermiform nematodes (33,793 and 27,800/250 g soil, respectively) than other isolates. Across isolates, the number of juveniles on …

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Functional Motifs In Siamese, A Plant Cyclin-Dependent Kinase Inhibitor, Narender Kumar Jan 2015

Functional Motifs In Siamese, A Plant Cyclin-Dependent Kinase Inhibitor, Narender Kumar

LSU Doctoral Dissertations

SIAMESE (SIM) and SIAMESE-RELATED-PROTEIN1 (SMR1), the founding members of the SIM/SMRs gene family, suppress mitosis and onset of endoreplication in the Arabidopsis’s trichome and sepal development, respectively, and hence have been suggested to be CDK inhibitors. In this study, I have investigated the exact role of SIM and SMRs and their evolutionarily conserved function throughout land plant evolution. Using split luciferase complementation (SLC), I have shown that both SIM and a distantly related a bryophyte “Physcomitrella patens” SMR (pSMR1) interacts with multiple types of Cyclin Dependent Kinases (CDKs). I have multiple lines of evidence that establish SIM and SMRs as …

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Evolutionary Relationships Among Fungal Soybean Pathogens And Molecular Marker Development In The Genus Cercospora, Sebastian Albu Jan 2015

Evolutionary Relationships Among Fungal Soybean Pathogens And Molecular Marker Development In The Genus Cercospora, Sebastian Albu

LSU Doctoral Dissertations

Cercospora leaf blight (CLB) and purple seed stain (PSS) are common soybean diseases in the Gulf South of the United States (USA). For nearly a century, Cercospora kikuchii has been considered as the only pathogen causing these diseases. However, previous reports of genetic diversity among isolates collected throughout Louisiana suggested the presence of multiple lineages or species. Recent systematic studies classified species of Cercospora using a taxonomic system based on phylogenetic analysis of five nuclear loci (legacy genes). Using a similar approach, cercosporoid fungi tentatively identified as C. kikuchii were evaluated along with 53 other species of Cercospora. No …

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Three Essays On Land Ownership, Gender, And Agricultural Productivity In The Case Of Developing Countries, Krishna H. Koirala Jan 2015

Three Essays On Land Ownership, Gender, And Agricultural Productivity In The Case Of Developing Countries, Krishna H. Koirala

LSU Doctoral Dissertations

This dissertation set out to evaluate the impact of land ownership and role of gender to the Filipino farmers and to investigate gender difference in agricultural productivity and technical efficiency of Malawian rural households. The first essay investigates the impact of land ownership on the productivity and technical efficiency of rice farmers in the Philippines. We use a 2007-2012 Loop Survey from the International Rice Research Institute (IRRI) and analyzed it by using a stochastic frontier function method. Results show that land ownership has a significant impact on technical efficiency. In particular, counter to the theory, the Comprehensive Agrarian Reform …

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Impact Of Exposure To Weathered Crude Oil And Accumulation Of Pahs In Crawfish (Procambarus Clarkii), Brittany Lynn Chichester Jan 2015

Impact Of Exposure To Weathered Crude Oil And Accumulation Of Pahs In Crawfish (Procambarus Clarkii), Brittany Lynn Chichester

LSU Master's Theses

The number of pipelines transporting crude oil and other refined petroleum products across the U.S. has increased 15.4% from 2004 to 2013. In Louisiana, over 3,450 miles of liquid petroleum pipelines crisscross the state. In January 2013, crude oil was accidentally released from an underground pipeline into Bayou Sorrel, Louisiana. This freshwater wetland is located within the Atchafalaya River Basin which is home to large populations of wild crawfish that could be impacted by the crude oil released. This study aims to assess the potential lethal impacts that crude oil spill may have produced in adult crawfish (P. clarkii) and …

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Three Essays On Economic Analysis Of Production Systems Of U.S. Grass-Fed Beef Industry, Basu Deb Bhandari Jan 2015

Three Essays On Economic Analysis Of Production Systems Of U.S. Grass-Fed Beef Industry, Basu Deb Bhandari

LSU Doctoral Dissertations

This dissertation research consists of three essays. The first two studies analyze experimental research data based on three pasture systems for grass-fed beef (GFB) production in the Gulf Coast Region. System 1 included bermudagrass and ryegrass; System 2 included bermudagrass, ryegrass, rye, dallisgrass, and clover mixtures (red, white, and berseem clovers); and System 3 included bermudagrass, soybean, sorghum sudan hybrid, ryegrass, rye, dallisgrass, and clover mixtures (red, white, and berseem clovers). Fifty-four Fall-born steers were weaned in May and grouped into nine groups and randomly blocked into treatments and replicates. Inputs and output data were recorded on a daily basis. …

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