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Edaphic And Vegetative Controls On Mercury Cycling In Oligohaline Wetlands, Jonathan M. Willis
Edaphic And Vegetative Controls On Mercury Cycling In Oligohaline Wetlands, Jonathan M. Willis
LSU Doctoral Dissertations
With the expansion of the human population and associated industries there is a concomitant increase in both resource utilization and the production of waste and deleterious by-products. Mercury is a naturally-occurring toxic metal with a complicated and unique biogeochemical cycle, and is often a contaminant of ecotoxicological concern in unindustrialized aquatic habitats. The research described herein was designed to elucidate multiple aspects regarding the behavior of mercury in oligohaline wetland habitats, particularly with respect to edaphic and vegetative effects, through a monitoring and characterization study as well as a series of manipulative experiments. The observational study, conducted in the wetlands …
Effects Of Varying Levels Of Cottonseed Hulls On Growth And Metabolic Indications Of Rumen Development Of Dairy Calves, Ryan Doescher
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 hip heights …
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 …
The Care Plan As An Indicator Of Change In Nursing Science Instruction: A Textbook-Based Analysis, Lindsay Bratton-Mullins
The Care Plan As An Indicator Of Change In Nursing Science Instruction: A Textbook-Based Analysis, Lindsay Bratton-Mullins
LSU Doctoral Dissertations
Sciences are critical in nursing education to aid the nurse in understanding health and disease processes. Accrediting bodies for nursing education have emphasized that educators teach in ways that encourage critical thinking and, therefore, produce safe-practicing, competent nurse graduates. Nursing care plans best reflect nursing education’s central goals. Because of its longevity of use and familiarity, in this study, the nursing care plan was used as a proxy for nursing science’s learning objectives. This research was a study of the nursing care plan as an indicator for change in nursing science education in the United States to determine if change …
Texasweed (Caperonia Palustris (L.) St. Hil.) Interference And Management In Drill-Seeded Rice, Rakesh K. Godara
Texasweed (Caperonia Palustris (L.) St. Hil.) Interference And Management In Drill-Seeded Rice, Rakesh K. Godara
LSU Doctoral Dissertations
Field research was conducted from 2006 to 2009 to study Texasweed [Caperonia palustris (L.) St. Hil.] interference and management in Cocodrie rice. Texasweed interference at 10 plants/m2 caused 24 to 31% rice yield reduction. The maximum possible yield loss was estimated to be 81%. Rice yield reduction was primarily due to a reduction in culms/m2 and filled grains per panicle. For maximum yield, Texasweed must be removed by two weeks after emergence and managed until permanent flood establishment. Shade had no effect on Texasweed emergence but significantly reduced growth and reproduction. At 100 days after emergence, 50, 70, and 90% …
Development Of Stable Microencapsulated Astaxanthin Powders Using Extracted Astaxanthin From Crawfish And Shrimp Byproducts, Jianing Pu
LSU Master's Theses
Crawfish and shrimp byproducts are an excellent source of astaxanthin. The antioxidant-rich natural astaxanthin dispersed in alpha linolenic acid-rich flaxseed oil (FO) may provide healthier functional food options for US consumers. The goals of this study were to extract astaxanthin from crawfish and shrimp byproducts and to develop astaxanthin dry powders using microencapsulation technology. Astaxanthin extracted with FO from crawfish (FOCA) and shrimp (FOSA) byproducts were stable at 30 and 40 Ž, but had substantial degradation at 50 and 60 Ž during four 4 h heating. The astaxathin degradation of FOCA and FOSA fitted with zero and first orders kinetics …
Analysis Of Consumer Preferences Toward 100% Fruit Juice Packages And Labels, Tatiana Bonilla
Analysis Of Consumer Preferences Toward 100% Fruit Juice Packages And Labels, Tatiana Bonilla
LSU Master's Theses
A national web survey was used to collected data from 253 households in the United States. Choice-based conjoint analysis was used to investigate which packaging and labeling attributes U.S. consumers consider important when choosing 100% fruit juices, and to estimate their willingness-to-pay. The attributes were packaging material, nutritional and health claims, presence of organic ingredients and whether the product was produced locally. Factor analysis, cluster analysis and a median split technique were used to identify market segments based on consumer preferences, behavior, and lifestyles. Differences between the segments were analyzed. A conditional logit model was used to estimate relative of …
Carbohydrate Sources And Maximizing The Use Of Supplemental Amino Acids In Diets For Weanling Pigs, Victor D. Naranjo
Carbohydrate Sources And Maximizing The Use Of Supplemental Amino Acids In Diets For Weanling Pigs, Victor D. Naranjo
LSU Doctoral Dissertations
The objectives of this research were 1) to determine the effect of replacing dried whey (DW) with milk chocolate product (MCP), dried whey permeate (DWP) with candy oats (CO), and spray-dried plasma protein (SDPP) with a novel swine nutritional supplement (SNS) on growth performance of weanling pigs, and 2) to determine the maximum level of supplemental L-Lys, along with DL-Met, L-Thr, and L-Trp that can be added in diets for 6- to 12 and 13- to 23-kg pigs. Three experiments were conducted to compare the feeding value of MCP (20% lactose and 60% sugars) and DW (70% lactose). Results from …
Three Essays On The Role Of Amenities As An Economic Development Strategy, Junpyo Hong
Three Essays On The Role Of Amenities As An Economic Development Strategy, Junpyo Hong
LSU Doctoral Dissertations
It is well known that an amenity is a key driving engine to regional economic growth. However, the site-specific nature of an amenity can characterize them as public goods. Due to this characteristic, local governments have difficulty optimally supplying amenities. This dissertation tries to find relationships between an amenity and economic growth. Three empirical papers comprise the original research in this dissertation. The findings of the meta-analysis in the first essay suggest little methodological diversity exists among researchers linking amenities to economic growth., I do find that employment growth is more likely related to man-made amenities even in research on …
The Influence Of Computer User Knowledge And Selected Demographic Characteristics The Academic Achievement Of High School Seniors, Michael E. Brown
The Influence Of Computer User Knowledge And Selected Demographic Characteristics The Academic Achievement Of High School Seniors, Michael E. Brown
LSU Doctoral Dissertations
The primary purpose of this study was to identify the influence of computer user knowledge as measured by the Computer User Knowledge Survey (CUKS), and the personal demographic characteristics of Gender, Age, and Race on academic achievement as measured by the Graduation Exit Examination-21 (GEE-21), among high school seniors in public schools in a parish in South Louisiana. The CUKS and the Gender and Race data were collected from the self-perceived CUKS survey administered to 295 seniors registered in English IV classes at a school in South Louisiana. The academic achievement data and the ages of the student subjects were …
Dietary Resistant Starch Improved Maternal Glycemic Control In Goto-Kakizaki Rat, Li Shen
Dietary Resistant Starch Improved Maternal Glycemic Control In Goto-Kakizaki Rat, Li Shen
LSU Doctoral Dissertations
Treatment for maternal hyperglycemia is limited on account of safety concerns for fetus. Our previous work has shown that inclusion of resistant starch in the diet decreases body fat accumulation in rodents, increases GLP-1 at both the gene expression level and plasma levels, and improves glucose tolerance in STZ-induced diabetic mice. However, studies concerning dietary resistant starch and maternal hyperglycemia are scarce. In this project, we examined the effects of dietary resistant starch in pregnant Goto-Kakizaki (GK) rats to improve glycemic control. Animal experiments were conducted to test the hypotheses. In study 1, the female GK rats were randomly grouped …
Using Algae To Estimate Postmortem Submersion Interval In A Louisiana Bayou, Sophia Renke
Using Algae To Estimate Postmortem Submersion Interval In A Louisiana Bayou, Sophia Renke
LSU Master's Theses
While algae are often used in forensic science for the determination and confirmation of death by drowning, their utility for the estimation of postmortem submersion interval (PMSI) has been underutilized. Algae are present in all water systems and will grow upon decomposing matter; yet, very little published literature exists on their use in PMSI estimation. Because PMSI is difficult to predict due to the variable nature of water, the reaction of the submerged body within water, and the lack of truly sarcophagous aquatic insects, algae are a potentially invaluable tool for the forensic anthropologist. This research investigates the utility of …
Analysis Of Media Agenda-Setting Effect On Consumer Confidence In The Safety Of The U.S. Food System Across Consumer Segments, Abhishek Bhagwat Bharad
Analysis Of Media Agenda-Setting Effect On Consumer Confidence In The Safety Of The U.S. Food System Across Consumer Segments, Abhishek Bhagwat Bharad
LSU Master's Theses
Recent food recalls and food scares in the United States have increased consumers’ risk perceptions about food borne illness and decreased their confidence in the safety of the U.S. food supply. Results from a continuous tracking of consumer confidence and media coverage of food safety events over a 67 week period between May 2008 and August 2009 are reported in the study. Factor analysis is performed on consumer characteristic statements to identify seven factors. Factor scores for these seven factors are used as inputs in a consumer segmentation procedure. A two step segmentation approach, hierarchical cluster analysis followed by partition …
Optimized Extraction Of Soluble Defatted Rice Bran Fiber And Its Application For Microencapsulation Of Fish Oil, Yuting Wan
LSU Master's Theses
Defatted rice bran (DRB) is a byproduct of rice milling and rice bran oil extraction. Soluble rice bran fiber (SRBF) extracted from defatted rice bran is known for its antioxidant activity and hypocholesterolemic effects in human, while purified menhaden oil (PMO) is a good source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The goal of the study was to estimate optimum extraction conditions to extract SRBF from DRB, develop a cost effective method to purify SRBF and produce microencapsulated PMO with SRBF. The response surface methodology showed that an estimated optimum yield of SRBF (7.89%) could be extracted from …
Designing A Whey Protein Based Material As A Scaffold For Bone Regeneration, Mia Dvora
Designing A Whey Protein Based Material As A Scaffold For Bone Regeneration, Mia Dvora
LSU Doctoral Dissertations
A novel gel material was designed and optimized for use as a bone tissue regeneration scaffold. Whey protein isolate (WPI), the primary component of the material, underwent considerable testing for conformity to a set of known material characteristics required for application in bone regeneration. WPI gels of different compositions were fabricated by thermally inducing gelation of high-concentration protein suspensions, and characterized for compressive strength and modulus, hydration swelling and drying properties, mechanical behavior change due to polysaccharide additives, and intrinsic pore network structure. The gels were also tested for their compatibility with MC3T3-E1 cells, and interactions such as cell adhesion, …
The Expansion Of The St. Joseph Altar In South Louisiana, Nara Maria Ersilia Crowley
The Expansion Of The St. Joseph Altar In South Louisiana, Nara Maria Ersilia Crowley
LSU Master's Theses
Crowley, Nara Maria Ersilia, B.A., The University of Massachusetts at Amherst, 2001. Master of Arts in Liberal Arts, Spring Commencement 2010 Major: Liberal Arts The Expansion of the St. Joseph Altar in South Louisiana Thesis directed by Professor Mary Jill Brody Page in thesis,113. Words in abstract, 146 ABSTRACT According to folklore, the Catholic St. Joseph Altar tradition dates back to the Fifteenth century droughts in Sicily. The famine that ensued resulted in prayers to the patron saint of protection, St. Joseph. Two legends evolved from the cessation of the drought - one of thanks for ending the famine, the …
Patterns And Mechanisms Of The Exploitation Of Mutualisms, Ellen Mcgrail Reid
Patterns And Mechanisms Of The Exploitation Of Mutualisms, Ellen Mcgrail Reid
LSU Master's Theses
Mutualisms are reciprocally exploitative interactions providing net benefits to both partners. These interactions can be exploited, in turn, by individuals that take advantage of benefits offered by one or both partners in a mutualism, while offering no benefits in return. For many mutualist-exploiter interactions the mechanisms allowing exploitation, and the maintenance of mutualisms in the face of exploitation, are still poorly understood. Here I describe manipulative field and laboratory experiments to investigate the mechanisms used by an exploiter to invade an ant-plant mutualism. I tested two non-mutually exclusive hypotheses for how a coreid (Mozena sp., Hemiptera: Coreidae) feeds on mymecophytic …
Perceptions Of The Effectiveness Of The Louisiana Master Cattle Producer Program, Louis Joseph Lirette
Perceptions Of The Effectiveness Of The Louisiana Master Cattle Producer Program, Louis Joseph Lirette
LSU Master's Theses
The beef cattle industry continues to be the second largest animal production industry in Louisiana. In 2007, there were 860,000 head of cattle and calves in Louisiana and 14,100 farms and ranches engaged in cattle production Beef production is virtually statewide, with 63 of 64 parishes generating income from beef production. The Master Cattle Producer Program is designed as a follow-up to the Master Farmer Program. It is a commodity-specific program to enhance the profitability of beef producers by teaching them research-based recommendations on all aspects of beef production. The purpose of this study was to assess the effectiveness of …
Retention And Transport Of Mercury And Nickel In Soils, Lixia Liao
Retention And Transport Of Mercury And Nickel In Soils, Lixia Liao
LSU Doctoral Dissertations
Nickel (Ni) is one of many trace metals widely distributed in the environment. High concentrations of Ni in soils and aquifers have been observed worldwide, causing several potential human health impacts. Better understanding of Ni transport in soils and aquifers is necessary to assess and remediate insitu environmental contamination. The movement of Ni in soils and aquifers is highly dependent on adsorption-desorption reactions in the solid phase. In this study, kinetic batch, sequential extractions, and miscible displacement experiments were conducted to investigate the effect of several of environmental factors including soil type, reaction time and competing ions, on the fate …
Developing And Building Collaborations Between A Cooperative Extension Service And A Local School And Its Community, Robin Boudreaux Landry
Developing And Building Collaborations Between A Cooperative Extension Service And A Local School And Its Community, Robin Boudreaux Landry
LSU Master's Theses
The purpose of this study is to determine the relationships and collaborations that have been established between a southern Louisiana parish Cooperative Extension Service and a low socio-economic school and its community as measured by the number of collaborations created and new programs launched, that has created a school and community partnership with the school with the planning, implementing and planting of a school garden. A qualitative study using the interview method was used to gather data. Analysis consisted of examining data for themes and discriminate cases. Guiding questions that centered on specific data were developed. Personal interviews were conducted …
New Binary Ti Vectors With Co-Directional Replicons For Agrobacterium Tumefaciens-Mediated Transformation Of Higher Plants, Seokhyun Lee
New Binary Ti Vectors With Co-Directional Replicons For Agrobacterium Tumefaciens-Mediated Transformation Of Higher Plants, Seokhyun Lee
LSU Doctoral Dissertations
Small, high-yielding binary Ti vectors of Agrobacterium tumefaciens were constructed. All four basic components of the vector, ColE1 replicon (715 bp) for Escherichia coli, VS1 replicon (2,659 bp) for A. tumefaciens, a bacterial kanamycin resistance gene (999 bp), and the T-DNA region (170 bp), were modified to reduce the vector size to 4,566 bp and to introduce a number of mutations to increase the copy number and other functionality. The transcriptional direction of VS1 replicon can be the same as that of ColE1 replicon (co-directional transcription), or opposite (head-on transcription) as in the case of widely used vectors (pPZP or …
Faining Pain And Care, Lindsey Elizabeth Maestri
Faining Pain And Care, Lindsey Elizabeth Maestri
LSU Master's Theses
Simple repetitive actions such as rocking or jumping paired with garments that contain, heighten, or limit the movements of such actions are the focus of my thesis work. Through the pieces in the show, I track these actions and plot them over a course of a lifespan, looking at the ways they define moments, change in meaning, and sometimes come to contradict themselves.
Cooking Times And Temperatures For Safe Consumption Of Louisiana Blue Crabs (Callinectes Sapidus), Nicole Watson Hazard
Cooking Times And Temperatures For Safe Consumption Of Louisiana Blue Crabs (Callinectes Sapidus), Nicole Watson Hazard
LSU Master's Theses
While all seafood has the potential of being associated with foodborne illness, Louisiana blue crabs (Callinectes sapidus) are exposed to Vibrio cholerae, Vibrio parahaemolyticus, Vibrio vulnificus, Listeria monocytogenes and Salmonella species in the estuarine habitat. This study was designed to determine the least amount of time and temperature needed to reduce or eliminate each of the aforementioned bacteria from a single Louisiana blue crab with either boiling or steaming heat treatments. Once the single crab heat treatment studies were completed, the bacteria that showed the greatest thermal resistance, Listeria monocytogenes, and the bacteria most associated with foodborne illness in Louisiana …
Evaluation Of Green Tea Extract As A Glazing Material For Shrimp Frozen By Cryogenic And Air-Blast Freezing, Srijanani Sundararajan
Evaluation Of Green Tea Extract As A Glazing Material For Shrimp Frozen By Cryogenic And Air-Blast Freezing, Srijanani Sundararajan
LSU Master's Theses
Green tea (Camellia sinensis) extract (GTE) is rich in polyphenolic compounds, especially catechins that are potent antioxidants. The antioxidant property of GTE may make it ideal for use as a glazing solution for suppressing lipid oxidation in shrimp (Litopenaeus setiferus) during frozen storage. In this study, GTE was evaluated as a glazing material for shrimp frozen by air-blast (BF) and cryogenic freezing (CF). Two percent, three percent and/or five percent green tea extract solutions (2GTE, 3GTE, 5TGE) were used for glazing. Distilled water glazed (GDW) and non-glazed (NG) shrimp were used as controls. The GTE was characterized by measuring color, …
Copper Oxide Wire Particles In Feed Pellets For Controlling Gastrointestinal Nematode Infection In Ewes And Lambs, Sarah Tammy Nicole Orlik
Copper Oxide Wire Particles In Feed Pellets For Controlling Gastrointestinal Nematode Infection In Ewes And Lambs, Sarah Tammy Nicole Orlik
LSU Master's Theses
Gastrointestinal nematode parasites cause extensive damage to small ruminants, and Haemonchus contortus is a major concern to production. In the past, small ruminants were dewormed at regular intervals and control methods were based primarily on the use of anthelmintics. At present, anthelmintic resistance has been reported worldwide and has developed into a serious problem for small ruminant management programs. In view of this, alternate control methods are needed. One alternative method is the use of copper oxide wire particles (COWP). Three independent trials were conducted during Spring, Summer, and Fall of 2008. Two trials evaluated the effect of COWP in …
Habitat Use, Movements And Spring Migration Chronology And Corridors Of Female Gadwalls That Winter Along The Louisiana Gulf Coast, Jacob M. Gray
Habitat Use, Movements And Spring Migration Chronology And Corridors Of Female Gadwalls That Winter Along The Louisiana Gulf Coast, Jacob M. Gray
LSU Master's Theses
The Louisiana Gulf Coast is an important wintering area for North American gadwall (Anas strepera). Conservation of winter habitat is a top priority of the Gulf Coast Joint Venture. Quantitative estimates of habitat use by wintering gadwall would help improve energetic demand models and subsequent estimates of habitat requirements. I used satellite telemetry (PTTs) to estimate winter habitat and refuge uses, spring migration chronology and corridors, as well as inter- and intra-regional winter movements of females. I used a split-plot MANOVA to evaluate the effects of individual females, female age, winter, hunt periods within winter, time of day, and all …
Pregnancy Rates In Beef Cattle Artifically Inseminated With Frozen-Thawed Aged Beef Semen, David Barry Carwell
Pregnancy Rates In Beef Cattle Artifically Inseminated With Frozen-Thawed Aged Beef Semen, David Barry Carwell
LSU Master's Theses
The duration of frozen semen storage had no effect on pregnancy rates (60%, 61% and 61%, respectively) in Angus females inseminated with semen from 25 Angus bulls from Time Frames 1 (1960-1975), 2 (1976-1991) and 3 (1992-2006). Pregnancy rates were not different for beef females inseminated with semen from Time Frames 1, 2 and 3 (55%, 62% and 55%, respectively). There were no differences for total and progressive sperm motility across Time Frames 1 (42% and 29%), Time Frame 2 (51% and 38%) and Time Frame 3 (55% and 41%) and percentage of normal and abnormal sperm from bulls in …
Physiological, Biochemical And Molecular Characteristics Associated With Virulence Of Burkholderia Glumae: The Major Causative Agent Of Bacterial Panicle Blight Of Rice, Hari Sharan Karki
Physiological, Biochemical And Molecular Characteristics Associated With Virulence Of Burkholderia Glumae: The Major Causative Agent Of Bacterial Panicle Blight Of Rice, Hari Sharan Karki
LSU Master's Theses
Burkholderia glumae is the bacterial pathogen causing bacterial panicle blight disease of rice (BPB). The pathogen, whose growth and pathogenicity is favored by high temperatures, has become a serious threat to rice production around the world possibly due to the current global climate changes. In this study, previously reported avirulent B. glumae strains were characterized in respect to the production of known virulence factors, toxoflavin, lipase and motility, and potential virulence factors, including polygalacturnase and type III secretion system (hypersensitive response). Considerable phenotypic variation was observed among the strains tested. Virulence of the B. glumae strains was closely related to …
Antioxidant Nanoparticles As Delivery Systems, Carlos Ernesto Astete R.
Antioxidant Nanoparticles As Delivery Systems, Carlos Ernesto Astete R.
LSU Doctoral Dissertations
The goal of the study was to develop antioxidant polymeric nanoparticles as a new delivery system for food and pharmaceutical applications. Natural antioxidants like alpha-tocopherol, vitamin C, and carnosine, are responsible to protect biological systems against free radicals attack. The conjugation of vitamin C-vitamin E (EC) and alpha-tocopherol-carnosine (VECAR) were performed to obtain antioxidant surfactants which were used for polymeric nanoparticle synthesis. The surfactant made of á-tocopherol (vitamin E) and ascorbic acid (vitamin C) of antioxidant properties dubbed as EC was used to make poly(lactic-co-glycolic) acid (PLGA) nanoparticles. Self-assembled EC nanostructures and PLGA-EC nanoparticles were made by nanoprecipitation, and the …
Application Of Anti-H Monoclonal Antibodies To Develop Rapid Immunoassay For Vibrio Vulnificus, Ravirajsinh Jadeja
Application Of Anti-H Monoclonal Antibodies To Develop Rapid Immunoassay For Vibrio Vulnificus, Ravirajsinh Jadeja
LSU Doctoral Dissertations
In the US there are about 76 million foodborne illness cases reported every year, in spite of initiatives by federal agencies. This emphasizes the need for the development of novel detection techniques which are sensitive, specific and rapid. A detection technique should be rapid enough to give results same day, allowing companies to release food lots without delay and decreasing storage costs. This kind of screening would also allow immediate measures, if needed, before releasing the lots. In the case of Vibrio vulnificus (V. vulnificus), conventional methods are available to identify and enumerate this pathogen in oysters, but they are …