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Articles 6931 - 6960 of 13619
Full-Text Articles in Entire DC Network
Eight Thousand Daughters Woven Into Bayou Birds, Megan Marie Singleton
Eight Thousand Daughters Woven Into Bayou Birds, Megan Marie Singleton
LSU Master's Theses
Over the course of the last year I have spent nearly every weekend investigating this aquatic landscape by canoe, deciphering the differences between native and invasive flora and fauna. I am interested in ways that art can address the natural world. My thesis exhibition, Eight Thousand Daughters Woven into Bayou Braids, depicts and interprets the Louisiana landscape, exploring the destructive beauty and materiality of invasive aquatic plants.
Differential Gene Expression In A Louisiana Strain Of Microalgae, John Joseph Tate
Differential Gene Expression In A Louisiana Strain Of Microalgae, John Joseph Tate
LSU Master's Theses
Considerable interest in alternative energy has stimulated research in biofuels, particularly microalgal biofuels. In particular, strains of algae that accumulate lipids to be used for biofuels must be adapted to outdoor growth and resistant to invasive species. Differential gene expression in a Louisiana algae/cyanobacteria co-culture consisting of approximately 97% Chlorella vulgaris and 3% Leptolyngbya sp. possessing these traits was examined. Possible reasons for the enhanced growth of the co-culture relative to a Chlorella monoculture were reviewed, including cyanobacterial symbiosis and chemicals produced by cyanobacteria or bacteria that could influence the growth of Chlorella. The co-culture and Chlorella monoculture were cultivated …
Integrated Management Of The Red Imported Fire Ant In Pastures, William Sullivan Hilbun
Integrated Management Of The Red Imported Fire Ant In Pastures, William Sullivan Hilbun
LSU Master's Theses
The effects and interactions of chemical, cultural, and biological control of red imported fire ant (RIFA) populations were evaluated in two replicated studies in pastures. The first study was conducted from 2005 through 2007 in Washington parish, Louisiana (WP) where the biological control Psuedacteon tricupsis phorid flies were present and at the LSU AgCenter St. Gabriel Research Station in St. Gabriel, Louisiana (SG) where Psuedacteon tricuspis flies were absent. The second study was conducted from May 2009 to May 2010 at St. Gabriel in the presence of phorid flies. In both studies, RIFA population indices in sites treated with methoprene …
Black-Woman Identity Centrality And Interference: An Examination Of Political Efficacy And Policy Attitudes, Alexandra Ghara
Black-Woman Identity Centrality And Interference: An Examination Of Political Efficacy And Policy Attitudes, Alexandra Ghara
LSU Master's Theses
While much of the recent literature centers on a discussion of the “inner conflict” experienced by black women, political scientists have not measured this identity conflict or its political consequences. In this article I fill this gap in the literature by employing a black-woman identity interference scale (Settles 2006) to test whether black women experience particular difficulty aligning their racial and gender interests, and how identity conflict affects their political efficacy (internal political efficacy, external political efficacy, and group political efficacy) and policy attitudes. I find that while black women’s political efficacy is only affect by their race consciousness, their …
Pretesting In Science: Effect On Unit Test Scores, Mary Catherine Johnson
Pretesting In Science: Effect On Unit Test Scores, Mary Catherine Johnson
LSU Master's Theses
ABSTRACT This study examines the effect that pretesting has on unit test scores in a high school Biology I classroom. The experimental classes were given a pretest before four units of curriculum and then taught the concepts of these units with a traditional lecture based methodology. Their unit test scores were compared to a control class that did not take pretests before the units. In addition, the End of Course (EOC) test scores of the control and experimental classes were compared to determine if pretesting improved transfer of knowledge to a different type of test. Pretesting did not cause a …
Characterization Of The Promoter And Insulator Activities Of The Scs' Insulator, Yu Ge
Characterization Of The Promoter And Insulator Activities Of The Scs' Insulator, Yu Ge
LSU Master's Theses
Eukaryotic gene expression is regulated by regulatory elements. Insulators are one class of regulatory sequences. They can prevent heterochromatin from spreading into euchromatin, block distal enhancer activity, or both. Insulators function by recruiting several associated proteins. The scs’ insulator, which is located at one end of the 87A7 hsp 70 locus, is bound by BEAF. In the Drosophila genome, more than 85 % of BEAF binding sites are found within 300 bp of transcription start sites, suggesting BEAF may be involved in promoter function. Based on previous insulator position effect assays, two sequences were found to be necessary for full …
Louisiana Social Workers: A Study On Attitudes Toward Lgbt Youth, Rachel Kathleen O'Pry
Louisiana Social Workers: A Study On Attitudes Toward Lgbt Youth, Rachel Kathleen O'Pry
LSU Master's Theses
Social workers in most professional practice settings will encounter young clients who identify as lesbian, gay, bisexual, or transgender (LGBT). It is therefore important that variables influencing levels of homophobia and transphobia among these workers be analyzed. In this study, the author sought to examine the attitudes and perceptions of social workers in Louisiana toward LGBT youth. These attitudes and perceptions were then compared to individual variables such as religion, previous training on sexual orientation and gender identity, and race. The Religious Commitment Inventory (RCI), Genderism and Transphobia Scale (GTS), and Heterosexual Attitudes Toward Homosexuals (HATH) scale were completed by …
Spiritual Support As Coping Among Alzheimer's Caregivers, Mary Katherine Schillings
Spiritual Support As Coping Among Alzheimer's Caregivers, Mary Katherine Schillings
LSU Master's Theses
The purpose of this study is to identify the effect of spiritual support on Alzheimer’s caregiver’s perceived burden. This study will examine the relationship between spiritual support and burden among Alzheimer’s caregivers. The collection of data was accomplished by a packet of surveys mailed to Alzheimer’s caregivers. For this study the population is separated and difficult to survey as a whole, therefore, a smaller cluster sample is surveyed from a specific organization. The global score of the burden measure is negatively correlated with the global score of the Spiritual Support Scale. In this study, spiritual support is not the sole …
The Effects Of Iodixanol Present During Equine Semen Cryopreservation, David Paul Beehan
The Effects Of Iodixanol Present During Equine Semen Cryopreservation, David Paul Beehan
LSU Master's Theses
The objectives of this study were to determine what effects iodixanol would have on total and progressive motility, plasma membrane integrity (viability), acrosome integrity and DNA structure when present during cryopreservation of equine spermatozoa,. We hypothesized that the addition of iodixanol would improve post-thaw values for measured parameters. Ejaculates from six stallions were collected, centrifuged at 900 x g for ten minutes to remove supernatant, and suspended to 200 x 106 cells/ml with 0%, 2.5% and 5% iodixanol in an egg-yolk based extender and cryopreserved. Before and after cryopreservation sperm motility was assessed by computer assisted semen analysis, and samples …
Development Of A Frozen Yogurt Fortified With A Nano-Emulsion Containing Purple Rice Bran Oil, Luis Alonso Alfaro Sanabria
Development Of A Frozen Yogurt Fortified With A Nano-Emulsion Containing Purple Rice Bran Oil, Luis Alonso Alfaro Sanabria
LSU Master's Theses
The U.S. frozen dessert business, including retail and foodservice markets, is the largest in the world. There is a need for deserts that offer better nutritional attributes, such as antioxidants than traditional deserts. Purple rice bran oil (PRBO) is an excellent source of natural antioxidants including tocopherol, tocotrienol, and oryzanol. Adding nano-emulsions of purple rice bran oil (NPRBO) to many products including frozen yogurts (FY) will improve the nutritional profile of the product by substantially increasing the natural antioxidant content. This fortification may have the potential to broaden the FY market. The objectives of this study were to develop and …
Reduced Protein For Late-Lactation Dairy Cows, Andre De Barros Duarte Pereira
Reduced Protein For Late-Lactation Dairy Cows, Andre De Barros Duarte Pereira
LSU Master's Theses
Excess protein in dairy cattle diets unnecessarily increases the cost of production and may contribute to environmental pollution. The objective of this research was to evaluate the effect of feeding dairy cows with two levels of dietary protein on animal performance and manure characteristics. Two experiments were carried out with 24 lactating dairy cows each. Experiment 1 was corn silage based and had a control TMR (HP1) estimated to contain 16.5% CP with SBM and treatment TMR (LP1; 13.5% CP) using DDGS and rumen protected Lys and Met. Experiment 2 was ryegrass haylage based and had a control TMR (HP2) …
Effects Of Mimic Artificial Oyster Reefs On The Ecology Of Juvenile Fishes In Marsh Ponds: A Before-After-Control-Impact Analysis, Steven B. Garner
Effects Of Mimic Artificial Oyster Reefs On The Ecology Of Juvenile Fishes In Marsh Ponds: A Before-After-Control-Impact Analysis, Steven B. Garner
LSU Master's Theses
I sought to assess the enhancement potential of mimic artificial oyster reefs (MAORs) on trophic dynamics of juvenile estuarine fishes in marsh ponds. Tropic dynamics were investigated by determining the impacts of MAOR addition on meiofauna and macrofauna and then comparing these results to the gut contents and condition of four abundant estuarine fishes: Atlantic croaker (Micropogonias undulatus), bay whiff (Citharichthys spilopterus), sand seatrout (Cynoscion arenarius), and pinfish (Lagodon rhomboides). Samples were collected every other month for two years (March 2009 – 11) employing a Before-After-Control-Impact (BACI) design. Halfway through the experiment (March 2010), two mud sites in two marsh …
Drought In Georgia: Water Scarcity Issues And Implications, Samantha Kay Chaisson
Drought In Georgia: Water Scarcity Issues And Implications, Samantha Kay Chaisson
LSU Master's Theses
Population growth and hydrological drought threaten the water supply of Atlanta, Georgia. In Georgia, water policy changed rapidly due to stress on the resource, regulation increased, and the state promoted a “culture of conservation” to combat water scarcity. This study examines how regulatory measures, including legislative acts and Governor’s executive orders, have impacted the population’s attitudes and behaviors towards water consumption. Furthermore, public spaces are used to measure public perception of water policy, and serve as a physical representation of the culture shift.
Influences On Behavior Adaptations To Reduce Exposure To Environmental Hazards Among Residents Of Louisiana's Upper Industrial Corridor, Corrinthia Marie Hinton
Influences On Behavior Adaptations To Reduce Exposure To Environmental Hazards Among Residents Of Louisiana's Upper Industrial Corridor, Corrinthia Marie Hinton
LSU Master's Theses
Over the past century, the growth in petrochemical manufacturing within Louisiana’s Upper Industrial Corridor brought economic development, but also introduced toxic emissions and environmental exposure risks to residents of the area. For the citizens living in close proximity to multiple facilities there is the added risk of chemical exposure from environmentally hazardous accidents. This study seeks to gain insights into patterns of risk-reducing behaviors of residents in East Baton Rouge Parish so that better educational outreach programs can be developed. This research addresses the following questions: To what extent are residents of Baton Rouge taking steps to reduce environmental exposure …
The Effects Of Spinosad On Culex Quinquefasciatus (Diptera: Culicidae) And Non-Target Insect Species, Owen Mcbride Jones
The Effects Of Spinosad On Culex Quinquefasciatus (Diptera: Culicidae) And Non-Target Insect Species, Owen Mcbride Jones
LSU Master's Theses
Spinosad is a relatively new insecticide with a unique mode of action that is being evaluated for control of larval mosquitoes. Whereas a number of toxicological studies have measured effects of spinosad on various mammals, fish, birds, and terrestrial arthropods, fewer studies have been conducted on the effects of spinosad on non-target aquatic insect species. Such studies are important as these species might be found in the same environments as mosquito larvae targeted for control. A neighborhood pond was surveyed to find a representative species of mosquito as well as other common aquatic insects with which to examine susceptibility to …
Inhibition Of Adipocyte Differentiation In 3t3-L1 Cell Line By Quercetin Or Isorhamnetin, Diana Gabriela Carvajal-Aldaz
Inhibition Of Adipocyte Differentiation In 3t3-L1 Cell Line By Quercetin Or Isorhamnetin, Diana Gabriela Carvajal-Aldaz
LSU Master's Theses
Carvajal-Aldaz, Diana Gabriela, B.S. Food Science, Zamorano University, 2007 Master of Science, Fall Commencement, 2012 Major: Food Science Inhibition of Adipocyte Differentiation in 3T3-L1 Cell Line by Quercetin or Isorhamnetin Thesis directed by Professor Jack N. Losso Pages in thesis, 43. Words in abstract, 281. ABSTRACT Obesity has become a major health problem worldwide. Obesity increases the risk of hypertension, diabetes, and certain types of cancer. Quercetin is a bioactive compound widely found in a variety of foods that are consumed daily. Isorhamnetin is a bioactive compound found in some foods and also is a quercetin metabolite. Many studies have …
Do Learning Logs Have An Impact On The Conceptual Mastery Of Force And Motion?: Subtitle, John Arthur Underwood
Do Learning Logs Have An Impact On The Conceptual Mastery Of Force And Motion?: Subtitle, John Arthur Underwood
LSU Master's Theses
This two-week study was conducted to investigate the impact Learning Logs have on student conceptual mastery of force, motion, and kinematics. To begin the study a sample of 554 ninth grade students were selected from a suburban public school in Louisiana. The students were randomly divided into experimental and control groups within four teachers’ classrooms. This distribution was to examine the impact of Learning Logs regardless of the teaching style or time of day. Upon the study’s conclusion there was no significant differences noted due to teaching style or time of day. The Force Motion Concept Evaluation (FMCE) was used …
An Analysis Of Change In Policy Context Regarding Corexit Dispersant Use Following The Deepwater Horizon Oil Spill, Kelly Arceneaux
An Analysis Of Change In Policy Context Regarding Corexit Dispersant Use Following The Deepwater Horizon Oil Spill, Kelly Arceneaux
LSU Master's Theses
On April 20, 2010, an explosion on the offshore drilling platform Deepwater Horizon located in the Gulf of Mexico resulted in the largest oil spill in U.S. history. The subsequent use of massive amounts of chemical dispersants near the Gulf floor, an untested method, led to great controversy regarding the regulation, use, and toxicity of dispersants of the COREXIT family of products, as well as of dispersants in general. This study compares dispersant (COREXIT brand products in particular) regulation and use in the United States, Norway and the United Kingdom; the latter two countries are among the largest oil producers …
Microencapsulation Of Self-Healing Concrete Properties, James Gilford Iii
Microencapsulation Of Self-Healing Concrete Properties, James Gilford Iii
LSU Master's Theses
ABSTRACT Recent studies in the literature have demonstrated the ability of self-healing processes to be effective in enhancing the overall life of concrete. The main goal of this project is to evaluate and to control specific parameters for the production of an effective self-healing matrix that can be utilized within the application of self-healing concrete. Therefore, the project objective is to synthesize microcapsules using dicyclopentadine and sodium silicate and to evaluate the effects of pH, temperature, and agitation rate on microcapsule morphology. The microcapsule diameter, yield analysis, and shell thickness were characterized using scanning electron microscopy. During the experimental analysis, …
Experimental And Numerical Investigation Of Pilot Scale Microwave Assisted Transesterification Process For Biodiesel Production, Pranjali D. Muley
Experimental And Numerical Investigation Of Pilot Scale Microwave Assisted Transesterification Process For Biodiesel Production, Pranjali D. Muley
LSU Master's Theses
The goal of this study was to design and test a pilot scale process for biodiesel production using advanced microwave technology and develop a numerical model for investigating various parameters affecting this process. Dielectric properties of materials play a major role in microwave design of a process. The dielectric properties (dielectric constant ε’ and dielectric loss ε”) of biodiesel precursors: soybean oil, alcohols and catalyst and their different mixtures were measured at four different temperatures (30°C, 45°C, 60°C and 75°C) and in the frequency range of 154 MHz to 4.5 GHz. Results indicate that the microwave dielectric properties of almost …
Yogurt Cultures Survive Upon Exposure To Two Antimicrobials And Streptococcus Thermophilus St-M5 Acquired Resistance To Both Antimicrobials, Maria Carolina Vives Habeych
Yogurt Cultures Survive Upon Exposure To Two Antimicrobials And Streptococcus Thermophilus St-M5 Acquired Resistance To Both Antimicrobials, Maria Carolina Vives Habeych
LSU Master's Theses
Different antimicrobials are added in the manufacturing of dairy products such as flavored yogurts and processed cheese. Potassium Metabisulfite (PM) and Potassium Nitrite (PN) have been reported to have antimicrobial effect on pathogenic microorganisms such as Clostridium botulinum and Listeria monocytogenes. Yogurt is known for its health benefits, due to the presence of cultured bacteria. PM and PN are not commonly used in the dairy industry hence it would be interesting to study their influence in yogurt culture bacteria. The objectives of this study were: 1. to elucidate the influence of PM and PN at various concentrations, on the growth …
Habitat- And Region-Specific Reproductive Biology Of Female Red Snapper (Lutjanus Campechanus) In The Gulf Of Mexico, Dannielle Helen Kulaw
Habitat- And Region-Specific Reproductive Biology Of Female Red Snapper (Lutjanus Campechanus) In The Gulf Of Mexico, Dannielle Helen Kulaw
LSU Master's Theses
This study compares reproductive biology estimates of female red snapper among three habitat types (natural shelf-edge banks, standing petroleum platforms and toppled petroleum platforms) and among six regions in the Gulf of Mexico (central Florida, northwest Florida, Alabama, Louisiana, north Texas and south Texas). In both studies, batch fecundity and spawning frequency increased with length, weight and age, and batch fecundity was best correlated with maternal length. Gulf-wide, 75% maturity was achieved by age-3 and 100% maturity was reached by age-8. Sizes- and ages-at-maturity differed among habitat types and regions. Females from natural habitat reached 50% maturity the slowest (age-5, …
Assessment Of Stink Bug Feeding Damage In Louisiana Soybean: Use Of A No-Choice Feeding Field Protocol, Jessica Leigh Parker
Assessment Of Stink Bug Feeding Damage In Louisiana Soybean: Use Of A No-Choice Feeding Field Protocol, Jessica Leigh Parker
LSU Master's Theses
Numerous arthropods are pests of soybean in the subtropical environment of Louisiana. The most important pod-feeding guild includes a complex of stink bugs (Hemiptera: Pentatomidae). One of these species, redbanded stink bug (Piezodorus guildinii [Westwood]), has emerged as a significant pest in Louisiana soybean. Currently, limited information is available describing soybean plant injury from this pest in the United States or compares injury relative to native stink bugs. Therefore, a field protocol was modified to assess injury to soybean seeds. Studies conducted in Louisiana during 2009-2011 used procedures to isolate the effects of infestation duration (24-96 h after infestation [HAI]) …
Predictors Of Resiliency In Women Affected By Hurricane Katrina, Valerie L. Walls
Predictors Of Resiliency In Women Affected By Hurricane Katrina, Valerie L. Walls
LSU Master's Theses
While the physical devastation of Hurricane Katrina was immediately obvious, the psychological effects of the storm are still being investigated and the positive effects of trauma, although few, have yet to be adequately explored. Although most individuals will experience a trauma during their lifetime, only a small minority experience negative psychological consequences (Breslau, 2002). Resiliency is a quickly developing area in the literature; however, few studies have investigated predictors of resilience and positive outcomes in adults exposed to natural disasters. The purpose of this study was to explore individual factors and predictors of resilience in women exposed to Hurricane Katrina. …
Use Of Expanded Shales, Clays And Slates-Light Weight Aggregate For Erosion Control And Grass Establishment On Un-Vegetated Embankments, Murilo De Santana Martins
Use Of Expanded Shales, Clays And Slates-Light Weight Aggregate For Erosion Control And Grass Establishment On Un-Vegetated Embankments, Murilo De Santana Martins
LSU Master's Theses
High salinity concentrations in soils used to renovation and construct levees adversely affect levee’s performance due to increased susceptibility for erosion problems. Dispersion of the soil particles caused by salts and seal formation affect levee structure stabilization and vegetation establishment is impaired due to lower water infiltration capacity in levees; and high osmotic pressure exerted by salts reducing water availability for seed germination leaving levee surface prone to severe rilling and soil loss from runoff erosion. The objectives of this research were determine if expanded shales, clays, and slates-light weight aggregate (ESCS-LWA) over clay reduces erosion and evaluate how ESCS-LWA …
Spatial Variability In Response Of Deltaic Baldcypress Forests To Hydrology And Climate, Som Bahadur Bohora
Spatial Variability In Response Of Deltaic Baldcypress Forests To Hydrology And Climate, Som Bahadur Bohora
LSU Master's Theses
Changing hydrology and climate have significantly altered ecologically significant cypress-tupelo forests in the deltaic plain of the Mississippi River. Though local responses of these swamps to hydrology are relatively well understood, broad-scale evaluation of ecological response differences of deltaic wetland forests has been limited by the lack of site-specific coupled hydrologic and ecological data. Baldcypress tree-rings from twenty-two sites were used to examine the responses of coastal swamp forests throughout the deltaic plain to environmental variables. The responses of these forests to environmental variables varied spatially; however, broad-scale measures of deltaic hydrology were more correlated with tree radial growth than …
Investigation Of Colored Dissolved Organic Matter And Dissolved Organic Carbon Using Combination Of Ocean Color Data And Numerical Model In The Northern Gulf Of Mexico, Nazanin Chaichitehrani
Investigation Of Colored Dissolved Organic Matter And Dissolved Organic Carbon Using Combination Of Ocean Color Data And Numerical Model In The Northern Gulf Of Mexico, Nazanin Chaichitehrani
LSU Master's Theses
The first part of this thesis includes evaluating and developing empirical band ratio algorithms for the estimation of colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) for SeaWiFS, MODIS and MERIS ocean color sensors for the northern Gulf of Mexico. For CDOM, matchup comparison between SeaWiFS-derived CDOM absorption coefficients and in situ absorption measurements at 412 nm (aCDOM(412)) were examined using the D’Sa et al. (2006) and the Mannino et al. (2008) algorithms. These reflectance band ratio algorithms were also assessed to retrieve aCDOM(412) from MODIS and MERIS data using the Rrs(488)/Rrs(555) and Rrs(510)/Rrs(560) band ratios, respectively. Since …
Water Quality Dynamics Of Low-Gradient, Headwater Streams In A Timber-Industry Dominated Watershed In Louisiana, Abram Atys Dasilva
Water Quality Dynamics Of Low-Gradient, Headwater Streams In A Timber-Industry Dominated Watershed In Louisiana, Abram Atys Dasilva
LSU Master's Theses
Timber harvesting can degrade the quality of adjacent water bodies, an important concern for Louisiana, nearly 50% of which is forested, and in which the forest industry is the second-largest manufacturing employer. To protect valuable freshwater resources in Louisiana, a manual of best management practices (BMPs) was published in 2000 describing techniques for limiting forestry-caused water quality degradation. While these BMPs are widely implemented, their effectiveness in protecting water quality is largely unknown. To determine the effectiveness of these BMPs, this thesis research conducted three studies to address timber harvest BMP effectiveness on protection of stream dissolved oxygen, metabolism, and …
Detection And Characterization Of Vibrio Vulnificus And Vibrio Parahaemolyticus Isolates: Pentaplex Pcr Assay And Its Application., Nabanita Bhattacharyya
Detection And Characterization Of Vibrio Vulnificus And Vibrio Parahaemolyticus Isolates: Pentaplex Pcr Assay And Its Application., Nabanita Bhattacharyya
LSU Master's Theses
The aim of the study was to develop an effective multiplex PCR protocol for simultaneous, rapid detection and characterization of two potential pathogens, Vibrio vulnificus and Vibrio parahaemolyticus and to enumerate their abundance in the environment. A Pentaplex PCR (pPCR) assay condition was developed with a combination of two species- and three pathogenic- specific PCR primer sets to simultaneously detect and characterize bacterial isolates for virulent/ non- virulent strains of V. parahaemolyticus and V. vulnificus. The pPCR assay was validated by three methods. First pPCR was tested on 300 bacterial isolates comprising of 7 reference strains, 117 V. vulnificus, 30 …
Soil Accretion And Organic Carbon Accumulation In The Tidal Salt Marshes Of The Liaohe Delta, China, Nicholas Lawrence Yuknis
Soil Accretion And Organic Carbon Accumulation In The Tidal Salt Marshes Of The Liaohe Delta, China, Nicholas Lawrence Yuknis
LSU Master's Theses
Wetlands provide a multitude of functions to people and ecosystems and because of this, maintaining or increasing wetland area is important. Wetlands can be significant carbon sinks because of the relatively high primary productivity and slow decomposition of organic matter in these systems and can thus impact the global carbon cycle and potentially climate change. The marshes of the Liaohe Delta are the largest in Liaoning Province; however, very little research has been done in this area to determine the rate of accretion and organic carbon sequestration in the salt marshes there. By using Cs-137 and Pb-210 dating techniques and …