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A Comparison Of Soil And Corn Kernel Aspergillus Flavus Populations: Evidence For Niche Specialization, Rebecca Ruth Sweany 2010 Louisiana State University and Agricultural and Mechanical College

A Comparison Of Soil And Corn Kernel Aspergillus Flavus Populations: Evidence For Niche Specialization, Rebecca Ruth Sweany

LSU Master's Theses

Aspergillus flavus is an opportunistic fungal pathogen that infects peanuts, cotton, corn and tree nuts. Aspergillus flavus is a major problem globally due to the production of acutely toxic and carcinogenic aflatoxins. Louisiana climatic conditions lead to annual threats of corn aflatoxin contamination. The purpose of this study was to determine the specific ability of different strains of A. flavus to infect corn. Five soil samples and 10 corn ears were collected from each of seven corn fields throughout Louisiana. In addition, Francis Deville of Monsanto Company collected 7, 6, 2, and 4 soil samples and corn ears from four ...


Study Of Host-Fungus Interactions Between Soybean And Phakopsora Pachyrhizi Using Proteomics, Sunjung Park 2010 Louisiana State University and Agricultural and Mechanical College

Study Of Host-Fungus Interactions Between Soybean And Phakopsora Pachyrhizi Using Proteomics, Sunjung Park

LSU Doctoral Dissertations

Asian soybean rust, caused by Phakopsora pachyrhizi, is an emerging disease in the continental U. S. and resistant commercial varieties have not been reported. In an effort to understand the interactions during rust infection of soybean, protein profile changes were examined over a 14-day period in soybean leaves of one susceptible commercial line (Pioneer 93M60) with or without soybean rust inoculation using proteomics in this study. Forty protein spots differentially expressed after rust inoculation were identified and fourteen of them were recovered and sequenced. These included proteins involved in plant defense, stress, metabolism, and other biological processes. During the time-course ...


Effects Of Varying Levels Of Cottonseed Hulls On Growth And Metabolic Indications Of Rumen Development Of Dairy Calves, Ryan Doescher 2010 Louisiana State University and Agricultural and Mechanical College

Effects Of Varying Levels Of Cottonseed Hulls On Growth And Metabolic Indications Of Rumen Development Of Dairy Calves, Ryan Doescher

LSU Master's Theses

A study was conducted to determine the effects of varying levels of cottonseed hulls on growth and metabolic indications of rumen development of dairy calves. Sixty-four Holstein calves (Heifers, n=40; Bulls, n=24) were randomly assigned to one of four dietary treatments which included calf starters containing no cottonseed hulls (control; C), 10% cottonseed hulls (10% CSH), 15% cottonseed hulls (15% CSH), or 20% cottonseed hulls (20% CSH). Calves were fed their respective treatments beginning on day 6 until day 56 of age. Body weights were measured at birth and biweekly thereafter until day 56 of age. Wither and ...


Laser-Assisted Zona Pellucida Hatching Of Frozen-Thawed In Vivo-Produced Bovine Embryos, Mindy Kaye Chiasson 2010 Louisiana State University and Agricultural and Mechanical College

Laser-Assisted Zona Pellucida Hatching Of Frozen-Thawed In Vivo-Produced Bovine Embryos, Mindy Kaye Chiasson

LSU Master's Theses

Incomplete zona hatching or failure of the zona to rupture compromises post-transfer embryo viability and conceptus development. Assisted hatching prior to the transfer of frozen-thawed bovine embryos has been proposed as a means to increase recipient pregnancy rates. The objective of this study was to determine if laser-assisted hatching would improve in vivo-produced frozen-thawed bovine embryo hatching and pregnancy rates. In Experiment I,II and III frozen direct-transfer embryos received either two a or three symmetrical rents at either 40% or 80% through the outer zona surface using the Hamilton Thorne XYClone® (Hamilton Thorne Biosciences) diode laser at 90% power ...


Antimicrobial Susceptibility, Genotypic Characterization, And Molecular Detection Of Vibrio Parahaemolyticus And Vibrio Vulnificus From Louisiana Oysters, Feifei Han 2010 Louisiana State University and Agricultural and Mechanical College

Antimicrobial Susceptibility, Genotypic Characterization, And Molecular Detection Of Vibrio Parahaemolyticus And Vibrio Vulnificus From Louisiana Oysters, Feifei Han

LSU Doctoral Dissertations

Members of the genus Vibrio are Gram-negative, halophilic bacteria that inhabit warm coastal and estuarine waters worldwide. Among pathogenic vibrios, Vibrio parahaemolyticus is the leading cause of seafood-related illnesses and Vibrio vulnificus causes the highest number of seafood-related deaths in the United States. Moreover, according to the U.S. Centers for Disease Control and Prevention, the incidence of infections of the two vibrios due to the consumption of oysters has shown a sustained increase since 2001, indicating further measures are needed to prevent human Vibrio illness. In this dissertation research, a total of 622 Vibrio isolates, consisting of 252 V ...


Effects Of Meal Timing On Anabolic Hormone Status And Energy Metabolism In Neonatal Dairy Calves, Katherine Claire Simon 2010 Louisiana State University and Agricultural and Mechanical College

Effects Of Meal Timing On Anabolic Hormone Status And Energy Metabolism In Neonatal Dairy Calves, Katherine Claire Simon

LSU Master's Theses

Twelve neonatal Holstein bull calves (38.52 ± 5.87 kg) were fed milk replacer at a fixed or varied meal time to determine the effects on metabolic hormone secretion, average daily intake, growth, and energy metabolism. Body weights were measured every two weeks from birth to 8 weeks. Rumen fluid was collected every two weeks from week 2 through 8. Serial blood collections were conducted every two weeks from week 2 through 8. Blood was collected, beginning at 0530, at 0, 15, 30, 45, 60, 75, 90, 105, 120, 135, and 150 minutes. Plasma was analyzed for ghrelin, leptin, growth ...


Influence Of Low Homogenization Pressures On Acid Tolerance, Bile Tolerance, Protease Activity, And Growth Characteristics Of Lactobacillus Delbrueckii Ssp Bulgaricus Lb-12, Streptococcus Salivarius Ssp Thermophilus St-M5, And Lactobacillus Acidophilus La-K, Tanuja Muramalla 2010 Louisiana State University and Agricultural and Mechanical College

Influence Of Low Homogenization Pressures On Acid Tolerance, Bile Tolerance, Protease Activity, And Growth Characteristics Of Lactobacillus Delbrueckii Ssp Bulgaricus Lb-12, Streptococcus Salivarius Ssp Thermophilus St-M5, And Lactobacillus Acidophilus La-K, Tanuja Muramalla

LSU Master's Theses

Lactobacillus delbrueckii ssp bulgaricus LB-12, Streptococcus salivarius ssp thermophilus ST-M5 and Lactobacillus acidophilus LA-K are dairy cultures widely used in the fermentation of dairy products. Homogenization is an essential process in dairy industry for making several products. High homogenization pressures (>50 MPa) are used to create stable emulsion, inactivate the pathogens and increase the protease activity of dairy cultures. Sparse literature is available on the influence of low homogenization pressures, and their effect on beneficial characteristics of dairy cultures is not well understood. The objective of this study was to determine the effect of low homogenization pressures on acid tolerance ...


Adolescents' Expectancy Beliefs And Task Values For Physically Interactive Video Games, Andrew James McGregor 2010 Louisiana State University and Agricultural and Mechanical College

Adolescents' Expectancy Beliefs And Task Values For Physically Interactive Video Games, Andrew James Mcgregor

LSU Master's Theses

The health benefits associated with appropriate levels of physical activity are well documented, but a large percentage of the population is not sufficiently active to attain those health benefits. Children are also not as active as they should be, and their activity levels decline during adolescence. Given that childhood activity patterns are likely to persist into adulthood, it is important to investigate ways to encourage children and adolescents to be physically active. Since virtually all school students participate in physical education programs, one way to do that is to explore ways that physical education programs can motivate children to be ...


The Returns And Volatility Of Agribusiness Stocks: How Do They Measure Up To Non-Agribusiness Stocks?, Benjamin Michael Clark 2010 Louisiana State University and Agricultural and Mechanical College

The Returns And Volatility Of Agribusiness Stocks: How Do They Measure Up To Non-Agribusiness Stocks?, Benjamin Michael Clark

LSU Master's Theses

Little literature exists that analyzes the historical risk and return associated with investing in the US agricultural sector. However, several observable trends have recently made investing in the US agricultural sector an area of interest among investors. Stock price indexes are a commonly used tool for summarizing the historical performance of a specific sector. A market-capitalization weighted stock price index is created to represent the largest US agribusiness firms since 1970, using the US Census Standard Industrial Classification system and the Economic Research Service’s definition of agribusiness. Geometric returns, standard deviation, Sharpe Ratio, and beta values are calculated for ...


Dopaminergic Input To The Equine Pituitary: Seasonal And Estradiol Effects, Sarah Case Clavier 2010 Louisiana State University and Agricultural and Mechanical College

Dopaminergic Input To The Equine Pituitary: Seasonal And Estradiol Effects, Sarah Case Clavier

LSU Master's Theses

Two experiments were conducted to study the effects of season and estradiol administration on dopaminergic input to the equine adenohypophysis. Experiment 1 began in the spring with 8 mares and 8 stallions and was repeated again in the summer, fall, and winter. Horses were given sulpiride injections of eight incremental doses (0.25 to 32 µg/kg BW). Within each group of 8 horses, half received the sulpiride in an increasing manner, the other half in a decreasing manner. Prolactin concentrations peaked in the first 15 to 30 min in all horses in all seasons. Prolactin areas under the curve ...


Cellulosic Ethanol In Louisiana: A Three Part Economic Analysis Of Feedstocks, Pricing Strategies And Location Strategies, Tyler B. Mark 2010 Louisiana State University and Agricultural and Mechanical College

Cellulosic Ethanol In Louisiana: A Three Part Economic Analysis Of Feedstocks, Pricing Strategies And Location Strategies, Tyler B. Mark

LSU Doctoral Dissertations

The development of an efficient biomass supply chain is pivotal for the cellulosic ethanol industry. The Louisiana Sugarcane Belt, and energy cane are the focus of this study. From both the producer and processor perspectives, cost of production, competitiveness of cellulosic ethanol, biomass pricing, changes in crop mix, and the optimal location for cellulosic ethanol processing facilities are the critical factors evaluated. Educating potential energy cane producers on production costs and agronomic practices is the first step in the biomass supply chain. This study finds that for energy cane producers to breakeven, processors need to pay producers at least $30 ...


Prepartum Maternal Cortisol Concentrations On Postnatal Cortisol Concentration And Immunoglobulin Absorption In Neonatal Dairy Calves, Dana Nadine Wooley 2010 Louisiana State University and Agricultural and Mechanical College

Prepartum Maternal Cortisol Concentrations On Postnatal Cortisol Concentration And Immunoglobulin Absorption In Neonatal Dairy Calves, Dana Nadine Wooley

LSU Master's Theses

The role of glucocorticoids on intestinal closure in neonates has recently become an area of interest but a definitive mechanism remains to be identified. It is known that glucocorticoids enhance immunoglobulin absorption in dairy calves, but the role of maternal glucocorticoids at parturition is not clear. In the present experiment, we obtained plasma and milk samples from primiparous and multiparous Holstein cows (n=24) to measure cortisol at 72, 48 and 24 hours before and 3, 6, 12, 24 and 48 hours after spontaneous parturition. After parturition, calves (n=24) were immediately removed from their dams and a blood sample ...


Stochastic Trends In Crop Yield Density Estimation, David I. Maradiaga 2010 Louisiana State University and Agricultural and Mechanical College

Stochastic Trends In Crop Yield Density Estimation, David I. Maradiaga

LSU Master's Theses

The search for improved methods of estimating crop yield density functions has been a theme of recurrent research interest in agricultural economics. Crop yield density functions are the statistical instrument that generates probability estimates of yield risk, and risk is an important decision variable in production agriculture. Recent research in crop yield density estimation suggests that yield probability estimates can be sensitive to the way yield data are filtered, and if true, then the search for an “adequate filter” is warranted. Such a quest is pursued in this study. It is proposed that unit-root tests can be used to identify ...


The Model System C. Elegans Demonstrates The Health Benefits Of Legumes And The Potential Benefits Of Legume Consumption, Carla Michele Sandlin 2010 Louisiana State University and Agricultural and Mechanical College

The Model System C. Elegans Demonstrates The Health Benefits Of Legumes And The Potential Benefits Of Legume Consumption, Carla Michele Sandlin

LSU Master's Theses

Legumes are high in protein and are a good source of fiber and folate. They contain beneficial oligosaccharides, plant sterols and phenolics. The purpose of this study was to demonstrate the health benefits of legumes using the model system Caenorhabditis elegans (C. elegans). Nine legumes (black beans, cranberry beans, dark red beans, great northern beans, large lima beans, lentils, light red kidney beans, navy beans and white kidney beans) were tested in the C. elegans model system. The various legume samples were ground using a centrifugal mill to 0.75mm, suspended in water (1% w/v) solution and autoclaved. C ...


Detect Live Salmonella Cells In Produce By Coupling Propidium Monoazide With Loop-Mediated Isothermal Amplification (Pma-Lamp), Siyi Chen 2010 Louisiana State University and Agricultural and Mechanical College

Detect Live Salmonella Cells In Produce By Coupling Propidium Monoazide With Loop-Mediated Isothermal Amplification (Pma-Lamp), Siyi Chen

LSU Master's Theses

Salmonella is a leading cause of foodborne illnesses worldwide. In recent years, an increasing number of Salmonella-related outbreaks in produce has been reported. It is therefore important that the produce industry be equipped with rapid, sensitive, specific detection methods for live Salmonella cells in produce to better ensure the produce safety. In this study, we first designed and optimized a loop-mediated isothermal amplification (LAMP) assay for Salmonella detection by targeting the invasion gene (invA). Then we incorporated a chemical reagent, propidium monoazide (PMA) into the sample preparation step to prevent LAMP amplification of dead Salmonella cells. To our knowledge, this ...


Understanding The Economic Factors That Impact The Financial Health Of Local Governments, John David Barreca 2010 Louisiana State University and Agricultural and Mechanical College

Understanding The Economic Factors That Impact The Financial Health Of Local Governments, John David Barreca

LSU Master's Theses

The state of Louisiana has been hit by several severe hurricanes in recent years, and these disaster events have placed a financial burden on parish budgets. As such, local governments have been compelled to bear various cleanup and recovery costs in the short and long term. Therefore, this research sought to evaluate the factors that drive the variation in the financial health of local governments in Louisiana. This research made two contributions. The first contribution sought to develop a comprehensive measure of economic activity at the county level, and the second contribution used econometric methods to estimate the effect of ...


Effects Of Environmental Variables And Crop Growth On Development Of Brown Rust Epidemics In Sugarcane, Wilmer Anibal Barrera 2010 Louisiana State University and Agricultural and Mechanical College

Effects Of Environmental Variables And Crop Growth On Development Of Brown Rust Epidemics In Sugarcane, Wilmer Anibal Barrera

LSU Master's Theses

Natural epidemics of brown rust, caused by Puccinia melanocephala, affecting sugarcane were studied to determine the crop and/or environmental factors that affect epidemic onset, severity and eventual decline. Environmental and crop growth variables were monitored along with disease severity in two susceptible cultivars, LCP 85-384 and Ho 95-988, each grown at a different location in Louisiana. During two seasons, correlation and multiple regression analyses identified leaf wetness and temperature as important determinants of disease severity for both cultivars. The results suggested that crop growth variables were not determinants for epidemics. Controlled conditions experiments assessing the interaction of leaf wetness ...


Effects Of Serum Addition To Culture Medium On Gene Expression In Day-7 And Day-14 Bovine Embryos, Jaime Manuel Angulo Campos 2010 Louisiana State University and Agricultural and Mechanical College

Effects Of Serum Addition To Culture Medium On Gene Expression In Day-7 And Day-14 Bovine Embryos, Jaime Manuel Angulo Campos

LSU Master's Theses

The addition of serum to embryo culture media may alter gene expression and trigger development of Large Offspring Syndrome. The objectives of this study were to determine gene expression levels in embryos cultured in the absence or presence of 5% calf serum and compare these expression patterns to in vivo derived embryos (IVD), and to determine the effects of serum on the length of day-14 embryos. Abattoir derived oocytes were fertilized and cultured in mSOFaa. At 72 hours post-insemination (hpi), embryos were randomly allocated into two treatments: mSOFaa without and with 5% calf serum. Embryos were then cultured to 168 ...


Ethylene Receptors Function As Components Of High-Molecular-Mass Protein Complexes In Arabidopsis, Brad Binder, Yi-Feng Chen, Zhiyong Gao, Robert Kerris, Wuyi Wang, G. Schaller 2009 University of Tennessee - Knoxville

Ethylene Receptors Function As Components Of High-Molecular-Mass Protein Complexes In Arabidopsis, Brad Binder, Yi-Feng Chen, Zhiyong Gao, Robert Kerris, Wuyi Wang, G. Schaller

Brad M. Binder

Background The gaseous plant hormone ethylene is perceived in Arabidopsis thaliana by a five-member receptor family composed of ETR1, ERS1, ETR2, ERS2, and EIN4. Methodology/Principal Findings Gel-filtration analysis of ethylene receptors solubilized from Arabidopsis membranes demonstrates that the receptors exist as components of high-molecular-mass protein complexes. The ERS1 protein complex exhibits an ethylene-induced change in size consistent with ligand-mediated nucleation of protein-protein interactions. Deletion analysis supports the participation of multiple domains from ETR1 in formation of the protein complex, and also demonstrates that targeting to and retention of ETR1 at the endoplasmic reticulum only requires the first 147 amino ...


Future Demand For Maternal And Child Health Care Services In Uttar Pradesh, Faujdar Ram, Usha Ram, Abhishek Singh 2009 International Institute for Population Sciences

Future Demand For Maternal And Child Health Care Services In Uttar Pradesh, Faujdar Ram, Usha Ram, Abhishek Singh

Abhishek Singh

No abstract provided.


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