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Articles 1021 - 1050 of 2496
Full-Text Articles in Life Sciences
Evaluation Of Control Tactics For Management Of Sweetpotato Weevil (Coleoptera: Curculionidae), Jie Chen
Evaluation Of Control Tactics For Management Of Sweetpotato Weevil (Coleoptera: Curculionidae), Jie Chen
LSU Doctoral Dissertations
Sweetpotato weevil (SPW), Cylas formicarius elegantulus (Summer), is the most damaging root-feeding insect of sweetpotato, Ipomoea batatas L. (Lam), worldwide. The efficacy and compatibility of host plant resistance and insecticide control were evaluated in this dissertation. cv. Beauregard is the most susceptible cultivar for oviposition and offspring performance of SPW compared to cvs. Evangeline and Murasaki. The oviposition preference was shaped by the larval experience of SPW, providing evidence in support of the Hopkins’ Host-Plant Selection Principle. Although oviposition on cv. Murasaki was reduced, the egg capacity of SPW developed on cv. Murasaki was not decreased, indicating an adaptive behavior …
Evolutionary Interactions Of Feather Molt In Birds, Ryan Scott Terrill
Evolutionary Interactions Of Feather Molt In Birds, Ryan Scott Terrill
LSU Doctoral Dissertations
The evolution of feathers was a key innovation for birds. The many functions that feathers provide have allowed birds to diversify into myriad habitats and styles of life. However, feathers are lightweight and break down, and must be replaced regularly in a process known as molt. The patterns and timing with which birds molt varies within and between species, and these different strategies are likely a product of the different ways birds use their feathers and the uneven distribution of resources available for molt in time and space. So far, no studies have attempted to place these strategies into an …
A Presynaptic Role For Nitric Oxide At A Gabaergic Synapse, John Wesley Maddox
A Presynaptic Role For Nitric Oxide At A Gabaergic Synapse, John Wesley Maddox
LSU Doctoral Dissertations
Amacrine cells are a class of retinal interneurons that process the visual signal in the inner retina. Several subtypes of amacrine cells express nitric oxide synthase and produce nitric oxide (NO), making NO a possible regulator of amacrine cell function. My dissertation research tests the hypothesis that NO alters amacrine cell GABAergic synaptic output. To investigate this, I made whole-cell voltage clamp recordings of cultured chick amacrine cells receiving synaptic input from other amacrine cells and Ca2+ imaging of amacrine cell dendrites, which can be presynaptic. I find that NO-dependent increases in GABAergic spontaneous postsynaptic current (sPSC) frequency are …
Documentation Of Siderophore Activity, Metal Binding, And Its Effect On Symptomatology Of Cercospora Leaf Blight Caused In Soybean By Cercosporin From Cercospora Cf. Flagellaris, Brian Michael Ward
Documentation Of Siderophore Activity, Metal Binding, And Its Effect On Symptomatology Of Cercospora Leaf Blight Caused In Soybean By Cercosporin From Cercospora Cf. Flagellaris, Brian Michael Ward
LSU Doctoral Dissertations
Cercospora leaf blight of soybean (Glycine max) is a serious problem in the mid-south of the United States and is present in most soybean-growing regions of the world. The causal organisms, Cercospora kikuchii, C. cf. flagellaris and C. cf. sigesbeckiae, utilize the photo-activated toxin cercosporin as the primary pathogenicity factor. The disease has historically been understood to progress from a purpling or bronzing of the leaves to a blight in which tissue dies. Previous literature showed possible binding of cercosporin to metals and previous work in our group showed possible use of minor element nutrition in the plant to reduce …
Patterns Of Diversification In A Neotropical Radiation Of Birds (Aves: Furnariidae), Glenn F. Seeholzer
Patterns Of Diversification In A Neotropical Radiation Of Birds (Aves: Furnariidae), Glenn F. Seeholzer
LSU Doctoral Dissertations
Ecology and the role of natural selection in lineage diversification has been a central topic in evolutionary biology since Darwin. At the macroevolutionary scale, this idea is embodied in the ecological theory of adaptive radiation, which posits that rapid diversification is driven by ecological adaptive radiation in which speciation is coupled with niche divergence. Within species, the theory of ecological speciation proposes that local adaptation drives speciation by reducing gene flow among populations occupying different environments either by directly reducing migration or by reducing the fitness of migrants. Much progress has been made testing these predictions in a multitude of …
The Immediate And Extended Effect Of Diet And Exercise On Metabolic Flexibility, Timothy Allerton
The Immediate And Extended Effect Of Diet And Exercise On Metabolic Flexibility, Timothy Allerton
LSU Doctoral Dissertations
Metabolic inflexibility is an emerging physiological marker indicative of metabolic dysfunction and associated with type 2 diabetes (T2D) and obesity. Exercise is a potent stimulus to improve metabolic health, however, not much is known about the acute effects of exercise on metabolic flexibility (METFLEX). The purpose of this dissertation was study the time-course of diet and exercise and its effects on METFLEX. Three studies were conducted to investigate molecular and clinical aspects of diet and exercise and how these stimuli may alter the metabolic response to fuel. The first study was conducted on obesity-prone, Osborne-Mendel (OM) and obesity-resistant S5B/Pl (S5B) …
Dynamic Modelling Of Local Government Wealth When Shocked By Natural Disasters, Alejandra Brevé Ferrari
Dynamic Modelling Of Local Government Wealth When Shocked By Natural Disasters, Alejandra Brevé Ferrari
LSU Master's Theses
Hurricane Katrina struck the Gulf Coast as a Category 3 storm on August 29th of 2005. It is the costliest natural disaster in U.S. history. Communities across the country are increasingly at risk of being affected by natural and environmental disasters. The Public Assistance Grant Program (PA Program) administered by the Federal Emergency Management Agency (FEMA) is available for states and communities that have received a major or emergency disaster declaration. Most of Emergency Management (EM) research has focused on preparedness and mitigation activities; considerably less research has studied post disaster response. Two of the initial and most important aspects …
Evaluation Of The Microbial Quality Of Cantaloupe Fruit Produced On Raised Or Flat Beds Following A Flooding Event, Isaack Kikway
Evaluation Of The Microbial Quality Of Cantaloupe Fruit Produced On Raised Or Flat Beds Following A Flooding Event, Isaack Kikway
LSU Master's Theses
Floodwater can contain microbial contaminants such as plant and foodborne pathogens and can compromise the quality of fresh fruit and vegetables produced in Louisiana. The goal of this research was to determine the impact of flooding on microbial quality (foodborne and plant pathogens) of cantaloupe fruit produced on raised or flat beds. Cantaloupe fruit produced on 30 cm raised beds or flat ground, were flooded with a mixture of surface and well water spiked with three generic Escherichia coli strains (ATCC 23716, 25922, 11775). Mean baseline generic Escherichia coli and total coliform populations in flood water (mixture of spiked well …
Physiological And Psychological Well-Being During The Spring Season In Female Soccer Players, Adam Conrad Lowe
Physiological And Psychological Well-Being During The Spring Season In Female Soccer Players, Adam Conrad Lowe
LSU Master's Theses
Female student-athletes are an understudied population that are exposed to athletic stressors in addition to academic and social stressors. This study is designed to investigate the physiological and psychological well-being during the spring season in female Division I soccer players. During the 2017 spring season, participants competed in five matches over five weeks and participated in three to four soccer training sessions in between match days. To measure well-being, both objective and subjective measures were used. Activation state was collected via the Activation Deactivation Adjective Checklist (AD-ACL) before all matches. Heart rate and heart rate variability were measured during all …
Descriptive Aanalysis Of Agritourism In Louisiana: Motivation. Marketing. Limitations., Denys Maksymov
Descriptive Aanalysis Of Agritourism In Louisiana: Motivation. Marketing. Limitations., Denys Maksymov
LSU Master's Theses
This study aims to present information on the existing Louisiana agritourism industry and create a descriptive profile of agritourism operators, addressing specifically what motivates people to engage in agritourism. A subsequent focus of the study is to document marketing approaches used in promoting agritourism operations and concerns and limitations faced by Louisiana agritourism operators. These will be achieved through the following objectives: 1. Use a survey instrument to collect information on the demographics of farmers interested and/or engaged in agritourism, farm characteristics, types of activities offered in the agritourism operations, as well as motivators for engaging in agritourism. 2. Analyze …
Fitness Costs And Inheritance Of Bt Cry2ab2 Resistance In Fall Armyworm, Spodoptera Frugiperda (J.E. Smith), Binod Acharya
Fitness Costs And Inheritance Of Bt Cry2ab2 Resistance In Fall Armyworm, Spodoptera Frugiperda (J.E. Smith), Binod Acharya
LSU Master's Theses
Evolution of resistance in target pest populations is a major threat to the sustainability of transgenic crops expressing Bacillus thuringiensis (Bt) proteins. Fall armyworm, Spodoptera frugiperda (J.E. Smith), is a cross-crop target pest of Bt corn, Bt cotton, and Bt soybean. This pest, thus far, is the only target pest species that has developed field resistance to Bt crops in multiple areas across countries. Cry2Ab2 is a common Bt protein expressed in transgenic corn and cotton targeting lepidopteran pests including S. frugiperda. The objective of this study was to characterize fitness costs and inheritance of Cry2Ab2 resistance in S. frugiperda. …
Role Of Varietal Resistance In Managing The Rice Water Weevil, A Major Insect Pest Of Louisiana Rice, Maisarah Mohamad Saad
Role Of Varietal Resistance In Managing The Rice Water Weevil, A Major Insect Pest Of Louisiana Rice, Maisarah Mohamad Saad
LSU Master's Theses
Resistance of several commercial rice varieties widely grown in Louisiana was assessed against the rice water weevil (Lissorhoptrus oryzophilus Kuschel), the major insect pest of rice in the United States. A five-year field study was conducted to identify resistant genotypes among conventional inbred, herbicide tolerant, conventional hybrid, and herbicide tolerant hybrid varieties. Resistance was evaluated in two different locations to enable selection of rice varieties with wide adaptability over diverse environments. There were no large differences in the resistance found amongst commercial rice varieties over the five-year field study. Jefferson was frequently found to support lower larval densities than other …
Occurrence And Phenology Of Polistine Wasps (Hymenoptera: Vespidae) In Southern Louisiana, Scott Nacko
Occurrence And Phenology Of Polistine Wasps (Hymenoptera: Vespidae) In Southern Louisiana, Scott Nacko
LSU Master's Theses
Phylogenetic studies suggest that historically all paper wasps (Vespidae: Polistinae) in North America have tropical origins. However, paper wasps have adapted to thrive in temperate conditions. Subtropical and temperate climates allow for a study of adaptive traits which can be retained or lost within populations, and ultimately help elucidate the process of social wasp evolution. Additionally, species occurrence patterns can help us to understand partitioning and resource use within populations. We investigated the occurrence and phenology of each Polistine species found at four sites in southern Louisiana around Baton Rouge, and also examined the occurrence and behavior of a closely …
Quizalofop-P-Ethyl Herbicide Interactions In Accase-Resistant Rice Production, Samer Y. Rustom Jr.
Quizalofop-P-Ethyl Herbicide Interactions In Accase-Resistant Rice Production, Samer Y. Rustom Jr.
LSU Master's Theses
A field study was conducted in 2015 and 2016 at the H. Rouse Caffey Rice Research Station (RRS) to evaluate mixture interactions of quizalofop and ALS-inhibiting herbicides. Quizalofop was applied at 120 g ai ha-1. Mixture herbicides included penoxsulam at 40 g ha-1, penoxsulam plus triclopyr at 352 g ha-1, halosulfuron at 53 g ha-1, bispyribac at 34 g ha-1, orthosulfamuron plus halosulfuron at 94 g ha-1, orthosulfamuron plus quinclorac at 491 g ha-1, imazosulfuron at 211 g ha-1, and bensulfuron at 43 g ha-1. All ALS herbicides mixed with quizalofop indicated antagonistic responses for weedy rice or barnyardgrass control …
Weight Management Delivered Through An App, May Help Resolve Body Image Dissatisfaction In Women Enrolled In Wic, Alexis Ariel O’Connell
Weight Management Delivered Through An App, May Help Resolve Body Image Dissatisfaction In Women Enrolled In Wic, Alexis Ariel O’Connell
Honors Capstones
No abstract provided.
Modern Vet Management Business Plan, Alaina Stanton
Modern Vet Management Business Plan, Alaina Stanton
Honors Capstones
No abstract provided.
Louisiana Agriculture Fall, 2016
First Record Of The Non-Native Suckermouth Armored Catfish Hypostomus Cf. Niceforoi (Fowler 1943) (Siluriformes: Loricariidae) From Central America, Wilfredo A. Matamoros, Caleb D. Mcmahan, Carlos R. Mejia, Parker H. House, Jonathan W. Armbruster, Prosanta Chakrabarty
First Record Of The Non-Native Suckermouth Armored Catfish Hypostomus Cf. Niceforoi (Fowler 1943) (Siluriformes: Loricariidae) From Central America, Wilfredo A. Matamoros, Caleb D. Mcmahan, Carlos R. Mejia, Parker H. House, Jonathan W. Armbruster, Prosanta Chakrabarty
Occasional Papers of the Museum of Natural Science, Louisiana State University
We document the first record of Hypostomus cf. niceforoi in Central America. Two specimens of these suckermouth armored catfishes were collected in Lake Nicaragua (Nicaragua) and identified as H. cf. niceforoi. Hypostomus niceforoi is endemic to Andean streams of Colombia, Venezuela, Ecuador, and Peru. We hypothesize that its introduction in Central America is related to the aquarium trade, as is the case of other armored catfish species introductions.
Louisiana Agriculture Summer, 2016, Lsu Agcenter
Louisiana Agriculture Summer, 2016, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Dynamics Of Resprouting And Forest Regeneration Following Anthropogenic Land Use In The Central Amazon Basin, Scott Lawrence Kosiba
Dynamics Of Resprouting And Forest Regeneration Following Anthropogenic Land Use In The Central Amazon Basin, Scott Lawrence Kosiba
LSU Doctoral Dissertations
Tree mortality is increasing with the effects of climate change and drought across the Amazon Basin while intense fires are becoming more prevalent. Tropical moist forest trees generally lack adaptations that protect against mortality during an intense fire, so anthropogenic burning typically kills high percentages of trees. Following disturbances where prescribed burning is used to limit woody encroachment and to fertilize the soil, abandoned land in central Amazonia becomes dominated by the pioneer tree genus, Vismia. Although the mechanisms by which Vismia comes to dominate previously-burned areas are not known, previous studies on anthropogenic land use and forest succession …
Discovering Potential Protein, Carbohydrate, And Lipid Based Food Ingredients In A Co-Culture Of Microalgae, Chelsea Tyus
Discovering Potential Protein, Carbohydrate, And Lipid Based Food Ingredients In A Co-Culture Of Microalgae, Chelsea Tyus
LSU Doctoral Dissertations
Louisiana Native Co-Culture of Microalgae (Chlorella Vulgaris L. and Cyanobacteria Leptolyngbya sp.) (CCA) was studied. CCA is a viable coculture for further investigation as a food component. This research characterized the proteins, carbohydrates, and lipids present in CCA. Algae cultivation parameters were controlled and analyzed. Treatment (Trt) 1 was CCA grown in cultures exposed to average scalar irradiance (ASI) of 1041 ± 269.18 μmol m-2 s-1 PAR and trt 2 was CCA grown in cultures exposed to ASI of 430 ± 96.03 μmol m-2 s-1 PAR. The trt (irradiance exposure) had the desired response on CCA species ratio Trt …
Towards A Better Understanding Of Antiviral Rnai In Caenorhabditis Elegans: Function Characterization Of Loss Of Antiviral Rnai Alleles 1026a And 1026d, Drake Leonard
Honors Capstones
No abstract provided.
Interlimb Differences In Movement Accuracy In Darkness Vary With Handedness Laterality Scores In Right-Handers, Taylor Amedee
Interlimb Differences In Movement Accuracy In Darkness Vary With Handedness Laterality Scores In Right-Handers, Taylor Amedee
Honors Capstones
No abstract provided.
The Effects Of Levodopa On The Performance Of Fine Motor Tasks In Individuals With Parkinson's Disease, Collette Maria Tilly
The Effects Of Levodopa On The Performance Of Fine Motor Tasks In Individuals With Parkinson's Disease, Collette Maria Tilly
Honors Capstones
No abstract provided.
Pentaerythritol Triacrylate-Co-Trimethylolpropane Nanocomposite Scaffolds As Osteogenic Components For Bone Tissue Engineering, Mollie Marie Smoak
Pentaerythritol Triacrylate-Co-Trimethylolpropane Nanocomposite Scaffolds As Osteogenic Components For Bone Tissue Engineering, Mollie Marie Smoak
Honors Capstones
No abstract provided.
An Analysis Of Environmentally-Persistent Free Radical Formation On Surrogate Soil Systems Containing Iron(Iii) And Copper(Ii) And The Potential Remediation Effects Of Laccases, Andrew Paul Mullet
An Analysis Of Environmentally-Persistent Free Radical Formation On Surrogate Soil Systems Containing Iron(Iii) And Copper(Ii) And The Potential Remediation Effects Of Laccases, Andrew Paul Mullet
Honors Capstones
No abstract provided.
Evotext: A New Tool For Analyzing The Biological Sciences, Grant Ramsey, Charles H. Pence
Evotext: A New Tool For Analyzing The Biological Sciences, Grant Ramsey, Charles H. Pence
Faculty Publications
We introduce here evoText, a new tool for automated analysis of the literature in the biological sciences. evoText contains a database of hundreds of thousands of journal articles and an array of analysis tools for generating quantitative data on the nature and history of life science, especially ecology and evolutionary biology. This article describes the features of evoText, presents a variety of examples of the kinds of analyses that evoText can run, and offers a brief tutorial describing how to use it.
Failure To Achieve Recommended Omega-3 Dha Intake During Pregnancy: Nutrition Education Needed, Carly Thaxton
Failure To Achieve Recommended Omega-3 Dha Intake During Pregnancy: Nutrition Education Needed, Carly Thaxton
Honors Capstones
No abstract provided.
Development Of A Transposon-Based Vector To Express Large Quantities Of Factor Viii, Allison Mikes
Development Of A Transposon-Based Vector To Express Large Quantities Of Factor Viii, Allison Mikes
Honors Capstones
No abstract provided.
Zein Nanoparticle Interaction With Soybean Plants, Kurt Ristroph
Zein Nanoparticle Interaction With Soybean Plants, Kurt Ristroph
Honors Capstones
No abstract provided.