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Multiple Envelope Stress Response Pathways Are Activated In An Escherichia Coli Strain With Mutations In Two Members Of The Deda Membrane Protein Family, Rakesh Sikdar, Angelica R. Simmons, William T. Doerrler Jan 2013

Multiple Envelope Stress Response Pathways Are Activated In An Escherichia Coli Strain With Mutations In Two Members Of The Deda Membrane Protein Family, Rakesh Sikdar, Angelica R. Simmons, William T. Doerrler

Faculty Publications

We have reported that simultaneous deletion of two Escherichia coli genes, yqjA and yghB, encoding related and conserved inner membrane proteins belonging to the DedA protein family results in a number of intriguing phenotypes, including temperature sensitivity at 42°C, altered membrane lipid composition, and cell division defects. We sought to characterize these and other phenotypes in an effort to establish a function for this protein family in E. coli. Here, using reporter assays, we show that the major envelope stress response pathways Cpx, Psp, Bae, and Rcs are activated in strain BC202 (W3110; yqjA yghB) at the permissive growth temperature …

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New Functions For The Ancient Deda Membrane Protein Family, William T. Doerrler, Rakesh Sikdar, Sujeet Kumar, Lisa A. Boughner Jan 2013

New Functions For The Ancient Deda Membrane Protein Family, William T. Doerrler, Rakesh Sikdar, Sujeet Kumar, Lisa A. Boughner

Faculty Publications

The DedA protein family is a highly conserved and ancient family of membrane proteins with representatives in most sequenced genomes, including those of bacteria, archaea, and eukarya. The functions of the DedA family proteins remain obscure. However, recent genetic approaches have revealed important roles for certain bacterial DedA family members in membrane homeostasis. Bacterial DedA family mutants display such intriguing phenotypes as cell division defects, temperature sensitivity, altered membrane lipid composition, elevated envelope-related stress responses, and loss of proton motive force. The DedA family is also essential in at least two species of bacteria: Borrelia burgdorferi and Escherichia coli. Here, …

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Breeding Seasonality In Central Amazonian Rainforest Birds, Philip C. Stouffer, Erik I. Johnson, Richard O. Bierregaard Jan 2013

Breeding Seasonality In Central Amazonian Rainforest Birds, Philip C. Stouffer, Erik I. Johnson, Richard O. Bierregaard

Faculty Publications

Although it has long been recognized that many tropical birds do not share the same narrow breeding periods as temperate birds, conventional thinking considers tropical breeding seasons to be discrete periods generally governed by rainfall seasonality. We used a database of >31,000 captures of 104 species collected over 17 years in rainforest near Manaus, Brazil (2.5°S), to examine timing of breeding. The proportion of individuals with active incubation patches peaked at 7% in the dry season, from October through December. The peak was about twice as high as the lowest rate, in the late wet season (April-June). From 9 to …

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Recovery Of Understory Bird Movement Across The Interface Of Primary And Secondary Amazon Rainforest, Luke L. Powell, Philip C. Stouffer, Erik I. Johnson Jan 2013

Recovery Of Understory Bird Movement Across The Interface Of Primary And Secondary Amazon Rainforest, Luke L. Powell, Philip C. Stouffer, Erik I. Johnson

Faculty Publications

Amazonia now contains vast areas of secondary forest because of widespread regeneration following timber harvests, yet the value of secondary forest to wildlife remains poorly understood. Secondary forest becomes structurally similar to primary forest after abandonment, and therefore we predicted that avian movement across the interface of primary and secondary forest (hereafter "the interface") would gradually increase with time since abandonment until recovery to pre-isolation levels. From 1992 to 2011, we captured 2,773 understory birds of 10 foraging guilds along the interface of primary forest fragments and zero- to 30-year-old secondary forest at the Biological Dynamics of Forest Fragments Project …

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Effects Of Timber Harvesting With Best Management Practices On Ecosystem Metabolism Of A Low Gradient Stream On The United States Gulf Coastal Plain, Abram Dasilva, Y. Jun Xu, George Ice, John Beebe, Richard Stich Jan 2013

Effects Of Timber Harvesting With Best Management Practices On Ecosystem Metabolism Of A Low Gradient Stream On The United States Gulf Coastal Plain, Abram Dasilva, Y. Jun Xu, George Ice, John Beebe, Richard Stich

Faculty Publications

Stream metabolism can be used as a measure of freshwater ecosystem health because of its responsiveness to natural and anthropogenic changes. In this study, we used stream metabolic rates to test for the effects of a timber harvest with Louisiana's current best management practices (BMPs). The study was conducted from 2006 to 2010 in a loblolly pine (Pinus taeda) stand in north-central Louisiana, USA, 45 ha of which was clear cut harvested in the summer of 2007. Dissolved oxygen (DO), water temperature, and stream depth were recorded at a site upstream (serving as a reference) and a site downstream of …

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Transport And Retention Of Nitrogen, Phosphorus And Carbon In North America's Largest River Swamp Basin, The Atchafalaya River Basin, Y. Jun Xu Jan 2013

Transport And Retention Of Nitrogen, Phosphorus And Carbon In North America's Largest River Swamp Basin, The Atchafalaya River Basin, Y. Jun Xu

Faculty Publications

Floodplains and river corridor wetlands may be effectively managed for reducing nutrients and carbon. However, our understanding is limited to the reduction potential of these natural riverine systems. This study utilized the long-term (1978-2004) river discharge and water quality records from an upriver and a downriver location of the Atchafalaya River to quantify the inflow, outflow, and inflow-outflow mass balance of total Kjeldahl nitrogen (TKN = organic nitrogen + ammonia nitrogen), nitrate + nitrite nitrogen (NO3 + NO2), total phosphorous (TP), and total organic carbon (TOC) through the largest river swamp basin in North America. The study found that, over …

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Influence Of Irrigation Water Discharge Frequency On Soil Salt Removal And Rice Yield In A Semi-Arid And Saline-Sodic Area, Yueqing Chen, Guangxin Zhang, Y. Jun Xu, Zhigang Huang Jan 2013

Influence Of Irrigation Water Discharge Frequency On Soil Salt Removal And Rice Yield In A Semi-Arid And Saline-Sodic Area, Yueqing Chen, Guangxin Zhang, Y. Jun Xu, Zhigang Huang

Faculty Publications

Irrigation practice for rice culture can be especially challenging in areas with limited water supply and soil salinization. In this study, we carried out a field experiment to assess the effects of different water discharge frequencies on soil salt content, rice yield and water use efficiency on a saline-sodic soil in a semi-arid region of Northeast China. The experiment comprised of three frequency levels of discharge [9-time (I-9-30), 6-time (I-6-30) and 3-time (I-3-30) discharge, all followed with a 30-mm irrigation] in comparison with the traditional irrigation practice of 2-time discharge followed with an 80-mm irrigation (I-2-80). Our initial hypothesis was …

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Nitrogen Uptake And Utilization Efficiency And Enzymatic Activity In Maize Genotypes, Lucimar Rodrigues De Oliveira, Glauco Vieira Miranda, Rodrigo Oliveira Delima, Roberto Fritsche-Neto, João Carlos Cardoso Galvão Jan 2013

Nitrogen Uptake And Utilization Efficiency And Enzymatic Activity In Maize Genotypes, Lucimar Rodrigues De Oliveira, Glauco Vieira Miranda, Rodrigo Oliveira Delima, Roberto Fritsche-Neto, João Carlos Cardoso Galvão

Faculty Publications

The aim of this study was to investigate the employment of components of the nitrogen efficiency use (NUE), and of the activities of the nitrate reductase and glutamine synthetase enzymes in the selection of nitrogen use efficient maize genotypes of maize. Ten maize genotypes at V4 stage were evaluated under high and low N. The experiment consisted of a 2 × 10 factorial (two levels of N and ten maize genotypes), in a randomized complete block design with three replicates. The following traits were evaluated: N uptake efficiency (NUpE), N utilizationefficiency (NUtE) and N use efficiency (NUE), and activities of …

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Insulin Receptor-Independent Upregulation Of Cellular Glucose Uptake, R. Krishnapuram, H. Kirk-Ballard, E. J. Dhurandhar, O. Dubuisson, V. Messier, R. Rabasa-Lhoret, V. Hegde, S. Aggarwal, N. V. Dhurandhar Jan 2013

Insulin Receptor-Independent Upregulation Of Cellular Glucose Uptake, R. Krishnapuram, H. Kirk-Ballard, E. J. Dhurandhar, O. Dubuisson, V. Messier, R. Rabasa-Lhoret, V. Hegde, S. Aggarwal, N. V. Dhurandhar

Faculty Publications

Background:Cellular glucose uptake can be enhanced by upregulating Ras signaling in either insulin-dependent or -independent manner. In presence of insulin and intact insulin signaling, Ras has a negligible role in glucose uptake. Conversely, when insulin signaling is impaired in obesity or diabetes, the insulin-independent Ras pathway may be valuable for enhancing glucose disposal. We previously reported that Ad36, a human adenovirus, enhances cellular glucose uptake by upregulating the Ras/Glut4 pathway. Here, we investigated if Ad36-upregulated Ras via the insulin-independent pathway, to enhance glucose uptake. Furthermore, uncontrolled upregulation of Ras is linked with oncogenic cell transformation, if the tumor-suppressor gene p53 …

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Molecular Characterization Of Two Evolutionarily Distinct Endornaviruses Co-Infecting Common Bean (Phaseolus Vulgaris), Ryo Okada, Chee Keat Yong, Rodrigo A. Valverde, Sead Sabanadzovic, Nanako Aoki, Shunsuke Hotate, Eri Kiyota, Hiromitsu Moriyama, Toshiyuki Fukuhara Jan 2013

Molecular Characterization Of Two Evolutionarily Distinct Endornaviruses Co-Infecting Common Bean (Phaseolus Vulgaris), Ryo Okada, Chee Keat Yong, Rodrigo A. Valverde, Sead Sabanadzovic, Nanako Aoki, Shunsuke Hotate, Eri Kiyota, Hiromitsu Moriyama, Toshiyuki Fukuhara

Faculty Publications

Two high-molecular-mass dsRNAs of approximately 14 and 15 kbp were isolated from the common bean (Phaseolus vulgaris) cultivar Black Turtle Soup. These dsRNAs did not appear to cause obvious disease symptoms, and were transmitted through seeds at nearly 100% efficiency. Sequence information indicates that they are the genomes of distinct endornavirus species, for which the names Phaseolus vulgaris endornavirus 1 (PvEV-1) and Phaseolus vulgaris endornavirus 2 (PvEV-2) are proposed. The PvEV-1 genome consists of 13 908 bp and potentially encodes a single polyprotein of 4496 aa, while that of PvEV-2 consists of 14 820 bp and potentially encodes a single …

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Identification And Expression Of Skinning Injury-Responsive Genes In Sweetpotato, Jollanda Effendy, Don R. La Bonte, Niranjan Baisakh Jan 2013

Identification And Expression Of Skinning Injury-Responsive Genes In Sweetpotato, Jollanda Effendy, Don R. La Bonte, Niranjan Baisakh

Faculty Publications

Skinning injury in sweetpotatoes (Ipomoea batatas) is responsible for significant postharvest loss resulting from storage diseases and weight loss. Unfortunately, there is no report on the genes involved in wound healing of sweetpotato and a better understanding will facilitate improved breeding strategies. An annealing control primer (ACP) system was used to identify genes expressed after skinning injury of sweetpotato cultivar LA 07-146 storage roots. Using 20 ACPs, 63 differentially expressed genes (DEGs) were identified. Functional annotation of the DEGs revealed that genes previously shown to respond to dehydration, those involved in wounding response, and the lignin and suberin biosynthesis pathways …

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Nucleolar Stress In Drosophila Melanogaster: Rnai-Mediated Depletion Of Nopp140, Allison James, Renford Cindass, Dana Mayer, Stephanie Terhoeve, Courtney Mumphrey, Patrick Dimario Jan 2013

Nucleolar Stress In Drosophila Melanogaster: Rnai-Mediated Depletion Of Nopp140, Allison James, Renford Cindass, Dana Mayer, Stephanie Terhoeve, Courtney Mumphrey, Patrick Dimario

Faculty Publications

Nucleolar stress results when ribosome biogenesis is disrupted. An excellent example is the human Treacher collins syndrome in which the loss of the nucleolar chaperone, Treacle, leads to p53-dependent apoptosis in embryonic neural crest cells and ultimately to craniofacial birth defects. here, we show that depletion of the related nucleolar phosphoprotein, Nopp140, in Drosophila melanogaster led to nucleolar stress and eventual lethality when multiple tissues were depleted of Nopp140. We used TeM, immuno-blot analysis and metabolic protein labeling to show the loss of ribosomes. Targeted loss of Nopp140 in larval wing discs caused caspase-dependent apoptosis which eventually led to defects …

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Ethanol Production Potential Of Sweet Sorghum Assessed Using Forage Fiber Analysis Procedures, Kun Jun Han, William D. Pitman, Misook Kim, Donal F. Day, Montgomery W. Alison, Michael E. Mccormick, Giovanna Aita Jan 2013

Ethanol Production Potential Of Sweet Sorghum Assessed Using Forage Fiber Analysis Procedures, Kun Jun Han, William D. Pitman, Misook Kim, Donal F. Day, Montgomery W. Alison, Michael E. Mccormick, Giovanna Aita

Faculty Publications

Sweet sorghum (Sorghum bicolor (L.) Moench) is widely recognized as a highly promising biomass energy crop with particular potential to complement sugarcane production in diversified cropping systems. Agronomic assessments have led to identification of four cultivars well suited for such sugarcane-based production systems in southern Louisiana. Sweet sorghum biofuel production systems are currently being developed, and research producing large sample numbers requiring ethanol yield assessment is anticipated. Fiber analysis approaches developed for forage evaluation appear to be useful for screening such large numbers of samples for relative ethanol yield. Chemical composition, forage fiber characteristics, digestibility, and ethanol production of sweet …

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Good Genes From Asia-Contributions And Opportunities Of Asian Origin Crops To U.S. Horticulture: An Introduction To The Workshop, Yan Chen, Jayesh B. Samtani Jan 2013

Good Genes From Asia-Contributions And Opportunities Of Asian Origin Crops To U.S. Horticulture: An Introduction To The Workshop, Yan Chen, Jayesh B. Samtani

Faculty Publications

No abstract provided.

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Fish And Macroinvertebrate Assemblage Composition And Diversity At Revetted Banks In The Pearl River And The Response Of These Assemblages To A Paper Mill Effluent Spill, Jose Alexander Vazquez Jan 2013

Fish And Macroinvertebrate Assemblage Composition And Diversity At Revetted Banks In The Pearl River And The Response Of These Assemblages To A Paper Mill Effluent Spill, Jose Alexander Vazquez

LSU Master's Theses

The armoring of river banks with riprap can have detrimental effects on lotic ecosystems due to the subsequent alteration of hydrologic regimes; however, evidence suggests that riprap can also increase aquatic diversity in degraded systems. The goal of my study was to determine what impacts riprapped banks have on fish and macroinvertebrate assemblages in the Pearl River, which has a history of anthropogenic degradation. I collected fishes with an electrofishing boat from armored and natural banks at five regions during fall 2011, winter 2012, and summer 2012. I also collected macroinvertebrates with introduced substrates in fall 2011. Richness was analyzed …

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Differential Effect Of 14 Free Fatty Acids In The Expression Of Inflammation Biomarkers On Human Coronary Arterial Cells, Adriana Soto Rodriguez Gil Jan 2013

Differential Effect Of 14 Free Fatty Acids In The Expression Of Inflammation Biomarkers On Human Coronary Arterial Cells, Adriana Soto Rodriguez Gil

LSU Master's Theses

Cardiovascular disease is the leading cause of death in the US, and circulating free fatty acids (FFAs) are known risk factors associated with cardiovascular inflammation. The influence of 14 dietary FFAs (including saturated, mono-, poly-unsaturated and trans), on the expression of inflammatory markers in human coronary arterial smooth muscle (HACSM) and endothelial (HCAEC) cells using a cell culture model was investigated. HACSM and HCAEC cell cultures were incubated with 200 μM of each FFA for 8 or 24 h respectively at 37 °C in a 5% CO2 humidified incubator. Inflammatory biomarkers were assessed by ELISA or Western Blot in the …

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Influence Of Soil Nutrients On Reproduction And Pathogenicity Of Rotylenchulus Reniformis On Cotton, Herath Mudiyanselage Manjula Thaminda Kularathna Jan 2013

Influence Of Soil Nutrients On Reproduction And Pathogenicity Of Rotylenchulus Reniformis On Cotton, Herath Mudiyanselage Manjula Thaminda Kularathna

LSU Master's Theses

Among the variety of pathogens of cotton (Gossypium hirsutum), nematodes play a major role in reducing yield. Across the U.S. cotton belt, millions of dollars are lost annually due to nematode infestation. In the Mid-South and Southeast United States, root-knot nematode (Meloidogyne incognita) and reniform nematode (Rotylenchulus reniformis) are responsible for the highest percentage of damage. Crop rotation and nematicides are currently the most commonly used management strategies for nematode management. Soil fertility, which has a direct effect on plant growth, is also known to influence disease severity. Therefore, soil fertility would be an additional factor to consider for management …

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Response Of Bovine Fetal Fibroblasts To Pluripotency Induction With In Vitro Transcribed Mrna, Tricia Adams Jan 2013

Response Of Bovine Fetal Fibroblasts To Pluripotency Induction With In Vitro Transcribed Mrna, Tricia Adams

LSU Master's Theses

Numerous studies have contributed to the induction of pluripotency in an abundance of cell types; however, transfection techniques and efficiency have yielded undesirable outcomes. Traditionally, the use of viral vectors as a mode of transmission has proven to be efficient in the induction of pluripotency transcription factors in mammalian cells. The increasing concern is random insertion of viral components within the host genome due to the viral mode of replication. The delivery of messenger RNA by cationic lipid delivery vehicles circumvents the viral concerns and provides an efficient and safe mode of reprogramming. Synthetic mRNA can be used to initiate …

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Natural Fracture Characterization In The Haynesville Shale, East Texas: A Core Study, Frank Leslie Morgan Jan 2013

Natural Fracture Characterization In The Haynesville Shale, East Texas: A Core Study, Frank Leslie Morgan

LSU Master's Theses

The Haynesville Shale in East Texas and Northwest Louisiana is one of the most studied and explored shale-gas plays in the United States. With new horizontal drilling and completion strategies, energy companies can produce hydrocarbons directly from the source rock making the Haynesville Shale an attractive resource. A key component of enhanced hydrocarbon production is the presence of natural fractures. They may serve as permeable pathways for hydrocarbon flow, especially in tight shales such as in the Haynesville Shale, where the matrix permeability is very low. In the case of the Haynesville Shale, little is known about the occurrence of …

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Placed Residue, Thomas Lapann Jan 2013

Placed Residue, Thomas Lapann

LSU Master's Theses

“Placed Residue” is a series of eight works that highlight nature and its transformative quality. The video, photos, and sculptural objects, contained in the show, call attention to different materials and how they undergo growth and decay. Using various resources ranging from Kinect to video projection I incorporate the unnatural in order to depict a natural narrative involving the viewer. In order to emulate these natural processes, a cause and effect system had been developed where nature completes the final object. These systems activate the material providing for behaviors to be visible through their tactile qualities and allowing for their …

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Quantification Of Total And Oil-Degrading Bacteria In Louisiana Marsh Sediment Following The Deepwater Horizon Oil Spill Using Cultivation And Real-Time Pcr Assays, Kristopher Nolan Ackoury Jan 2013

Quantification Of Total And Oil-Degrading Bacteria In Louisiana Marsh Sediment Following The Deepwater Horizon Oil Spill Using Cultivation And Real-Time Pcr Assays, Kristopher Nolan Ackoury

LSU Master's Theses

Although the impacts of the Deepwater Horizon (DWH) oil spill on the bacterial communities in several Gulf of Mexico habitats have been described, little if any research has been published evaluating the impacts of the spill on bacterial populations in the most severely oiled salt marsh soils of Barataria Bay, Louisiana. The aim of this study was to define the effects of the spill on the total and oil-degrading bacterial communities in these marshes. Using quantitative real-time PCR (qPCR) and traditional cultivation methods bacterial communities from contaminated marsh soils were examined thirteen, twenty-two, and twenty-nine months after the initial oiling …

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Sweetpotato Storage Root Rots: Flooding-Associated Bacterial Soft Rot Caused By Clostridium Spp. And Infection By Fungal End Rot Pathogens Prior To Harvest, Washington Luis Da Silva Jan 2013

Sweetpotato Storage Root Rots: Flooding-Associated Bacterial Soft Rot Caused By Clostridium Spp. And Infection By Fungal End Rot Pathogens Prior To Harvest, Washington Luis Da Silva

LSU Master's Theses

Sweetpotato production in the southern United States is being threatened by a soft rot that develops in storage roots when fields are flooded and by an important post-harvest disease caused mainly by the fungi Fusarium solani and Macrophomina phaseolina. To identify the pathogens responsible for development of the soft rot, samples were collected from storage roots with soft rot from intentionally flooded fields and decayed tissue was streaked on plates of nutrient dextrose agar plus 0.05% cysteine and incubated anaerobically. Two distinct groups of Gram positive strict anaerobic bacteria were re-isolated from rotting storage roots. Endospores were observed in all …

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Influence Of "Added" Whey Protein Isolate On Probiotic Properties Of Yogurt Culture Bacteria And Yogurt Characteristics, Luis Alfonso Vargas Lopez Jan 2013

Influence Of "Added" Whey Protein Isolate On Probiotic Properties Of Yogurt Culture Bacteria And Yogurt Characteristics, Luis Alfonso Vargas Lopez

LSU Master's Theses

Consumers are becoming conscious of their diet, increasing protein intake and avoiding carbohydrates and fats. Whey proteins have branch chain amino acids responsible for muscle building. Whey protein isolate (WPI) contains more than 90% protein. The effect of incremental addition of WPI on probiotic characteristics of pure cultures and cultures in yogurt and yogurt characteristics are not known. The hypothesis was that “added” WPI will influence the characteristics of yogurt culture bacteria in pure form and in yogurt. The objectives were: to determine the influence of added WPI on (1) acid and bile tolerance, growth and protease activity of pure …

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Performance And Power Comparisons Between Fermi And Cypress Gpus, Ying Zhang Jan 2013

Performance And Power Comparisons Between Fermi And Cypress Gpus, Ying Zhang

LSU Master's Theses

In recent years, modern graphics processing units have been widely adopted in high performance computing areas to solve large scale computation problems. The leading GPU manufacturers Nvidia and AMD have introduced series of products to the market. While sharing many similar design concepts, GPUs from these two manufacturers differ in several aspects on processor cores and the memory subsystem. In this work, we conduct a comprehensive study to characterize and compare the architectural features of Nvidia’s Fermi and AMD’s Cypress GPUs. We first investigate the performance and power consumptions of an AMD Cypress GPU. By employing a rigorous statistical model …

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Silver Transport And Adsorption-Desorption In Soils: Influence Of Zinc, Liyun Zhang Jan 2013

Silver Transport And Adsorption-Desorption In Soils: Influence Of Zinc, Liyun Zhang

LSU Master's Theses

Transport of heavy metals such as Ag is affected by several rate-limiting processes including adsorption and release reactions in soils. In this study, the objective was to qualify adsorption-desorption behavior and transport of silver in the different soils. This study also investigated the influence of the presence of Zn on Ag retention and transport in soils. Kinetic batch adsorption-desorption and column experiments were carried out to investigate the adsorption-desorption and transport of silver in soils having different properties in the presence of Zn. Transport of Ag was carried out using miscible-displacement experiments in water saturated soil columns. For all soils, …

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The Real Of The Postmodern Rabble : Žižek And The Historical Truth Of The Hegelo-Lacanian Dialectic, Zachary Nathan Tavlin Jan 2013

The Real Of The Postmodern Rabble : Žižek And The Historical Truth Of The Hegelo-Lacanian Dialectic, Zachary Nathan Tavlin

LSU Master's Theses

In this essay I attempt to answer a fundamental question about Žižek’s heterodox reading of Hegel’s dialectic: what project sustains this reading in the first place? That is, what is at stake for Žižek himself? The purpose of this essay is to develop in this fashion a reading of Žižek (since he does not programmatically answer this question), although not one that is necessarily meant to compete against other alternatives. My argument, then, is that Žižek’s ontological and hermeneutical project is ultimately political, that when Žižek says we need Hegel “now more than ever,” he has a political situation in …

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The Uplift Resistance Of Spartina Alterniflora In A Louisiana Salt Marsh, James Madison Bouanchaud Iii Jan 2013

The Uplift Resistance Of Spartina Alterniflora In A Louisiana Salt Marsh, James Madison Bouanchaud Iii

LSU Master's Theses

The uprooting resistance of Spartina Alterniflora was measured in Terrebonne Bay and Bay Jimmy, both of which are located in Louisiana. The parameters collected included plant uprooting resistance, stem diameter, and stem height. Seasonal variations and site specific properties were considered. A device was designed and constructed that was able to perform the specific testing under the constraints of the field site. The device consisted of a winch mounted to a tripod and connected to an inline load cell to measure the uprooting resistance. The data sets were analyzed to determine the relationship between the uprooting resistance and the physical …

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Modeling, Simulation And Analysis Of Renewable Energy Production Systems: Application To Multi-Product Biorefineries, Aryan Geraili Nejadfomeshi Jan 2013

Modeling, Simulation And Analysis Of Renewable Energy Production Systems: Application To Multi-Product Biorefineries, Aryan Geraili Nejadfomeshi

LSU Master's Theses

The primary purpose of this research is to investigate the design and modelling of fully integrated processes which utilize renewable feedstock as raw materials and evaluate the alternative technology and possible process integration options for biorefinery processes to select the optimal configuration based on the production yields and economical profit criteria. The case study considered in this work is a lignocellulosic biorefinery plant which has different technology choices for each section of the process and the ability to produce multi-products from lignocellulosic raw materials. We analyzed different scenarios by simulating the superstructures in Aspen Plus. To incorporate more non-linarites in …

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The Use Of Duddingtonia Flagrans For Gastrointestinal Parasitic Nematode Control In Feces Of Exotic Artiodactylids At Disney's Animal Kingdom®, Jenna Terry Jan 2013

The Use Of Duddingtonia Flagrans For Gastrointestinal Parasitic Nematode Control In Feces Of Exotic Artiodactylids At Disney's Animal Kingdom®, Jenna Terry

LSU Master's Theses

Gastrointestinal nematodes (GIN) are parasites of major concern for domestic and exotic ruminant species around the world. In the past, zoological facilities used anthelmintics as their primary control method. Challenges in accurate dosing and administration of anthelmintics to exotic hoofstock contributed to the development of resistant nematode populations in zoological settings. The historic dependency on anthelmintics to control GIN populations is no longer an option. Biological alternatives are urgently needed, in both exotic and domestic ruminants, in the war against resistance. One such alternative is the use of the nematophagous fungus, Duddingtonia flagrans. Three independent studies were conducted: A nine …

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On Human Biological Diversity : Variation In Sexual Dimorphism Of The Skull Between African-Americans And European-Americans, Amanda Grace Kittoe Jan 2013

On Human Biological Diversity : Variation In Sexual Dimorphism Of The Skull Between African-Americans And European-Americans, Amanda Grace Kittoe

LSU Master's Theses

This study assesses sexual dimorphism of the skull in samples of African-Americans (AA) and European-Americans (EA). Morphology of the cranium is classically referenced as an indicator of sexual dimorphism in the fields of bioarchaeology and forensic anthropology. Variation in size and shape of cranial elements has been found to differ significantly between ancestral populations. Abundant research suggests that patterns of sexual dimorphism also vary between ancestries. This study uses a sample of 55 AA females, 50 AA males, 49 EA females, and 49 EA males from the Hamann-Todd Collection at the Cleveland Museum of Natural History and the WM Bass …

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