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Articles 1621 - 1650 of 2496
Full-Text Articles in Life Sciences
Effects Of Exercising With A Weighted Vest On The Output Of Lower Limb Joints In Countermovement Jumping, Behdad Tahayori
Effects Of Exercising With A Weighted Vest On The Output Of Lower Limb Joints In Countermovement Jumping, Behdad Tahayori
LSU Master's Theses
The effect of exercising with a weighted vest equal to 15% of body mass on vertical jump height was assessed. It was hypothesized that the defined treatment protocol could enhance jumping performance by increasing hip, knee and ankle joint power. The findings of this study showed that the defined active stretching protocol significantly increases jump height in male participants (0.3364 m compared to0. 3456 m from pre to post exercise respectively) but did not yield a significant increase in females. No significant changes in joint angle, torque, power or velocity were observed between the pre and post exercise jumping. However, …
Survivorship, Tunneling And Feeding Behaviors Of Formosan Subterranean Termite (Isoptera: Rhinotermitidae) In Response To Trans-Caryophyllene, Qiaoling Qi
LSU Master's Theses
The Formosan subterranean termite, Coptotermes formosanus Shiraki, an invasive species from southern China, is one of the most destructive wood pests in the United States. Presently, termites are managed through chemical control. However, some synthetic chemicals cause serious environmental problems due to their persistence and toxicity. There is growing interest in using natural compounds with low toxicity to mammals to control termites. Trans-caryophyllene is a component of essential oil found in many flowering plants. It is especially abundant in clove oil. It has also been found to be released from the roots of maize damaged by insects. I investigated caryophyllene …
Carotid Intima-Media Thickness And Physical And Cognitive Function In Elderly Men And Women: Role Of Physical Activity, John Brent Jr. Rhodes
Carotid Intima-Media Thickness And Physical And Cognitive Function In Elderly Men And Women: Role Of Physical Activity, John Brent Jr. Rhodes
LSU Master's Theses
The incidence of cognitive impairment in the aging population remains one of the most common morbidities in the elderly, often associated with a decrease in physical function, institutionalization, and death. Several different mechanisms have been proposed, including age-related changes to the vasculature. The purpose of this study was to examine the relationship between physical activity, carotid intima-media thickness and other vascular measures, and measures of cognitive and physical function in older adults. Measures of daily physical activity, vascular structure and function, and cognitive and physical function were examined in 109 participants [age=81±11 yrs]. Daily physical activity was assessed using the …
An Evaluation Of Endurance And Combined Endurance And Resistance Training On Fitness And C-Reactive Protein, Laura A. Daray
An Evaluation Of Endurance And Combined Endurance And Resistance Training On Fitness And C-Reactive Protein, Laura A. Daray
LSU Master's Theses
PURPOSE: This study was designed to determine whether endurance or endurance + resistance training would influence circulating C-reactive protein (CRP) levels and if these changes are related to alterations in aerobic fitness and/or body composition. METHODS: Fifty eight healthy young adults aged 18-24 yrs (78% female) were assigned to one of three groups: 1) endurance training (E) (n=18), 2) endurance + resistance training (ER) (n=11), or 3) active control (AC) (n=29). The E group completed 15 weeks of endurance training for either a half marathon (n=6) or full marathon (n=12). The ER group performed 15 weeks of periodized resistance training …
Altering Sweet Potato Starch Functionality By Amino Acids And Ph Treatments, Jonathan Futch
Altering Sweet Potato Starch Functionality By Amino Acids And Ph Treatments, Jonathan Futch
LSU Master's Theses
The sweet potato is a vegetable containing high levels of different vitamins and minerals, needed to protect the body against disease. This study focused on starch found in the Beauregard and Evangeline sweet potatoes and observed the effect of pH and amino acid additives altering the functionality of starch. These modifications of the Beauregard and Evangeline sweet potato starches will also be done to determine if an increase in resistant starch and slowly digestible starch is found. Beauregard and Evangeline starches had similar gelatinization temperature and the two starches required the same amount of energy to gelatinize. In Freeze-dried Beauregard …
Effect Of Rotational Or Continuous Stocking Method Of Winter Pasture On Beef Heifer Performance, David G. Skeans
Effect Of Rotational Or Continuous Stocking Method Of Winter Pasture On Beef Heifer Performance, David G. Skeans
LSU Master's Theses
Considerable research has been conducted comparing the effect of continuous and some form of rotational stocking method on animal and forage performance, but most research utilizes put-and-take stocking rates. The purpose of this research was to determine the effect of 12-paddock rotational stocking method (ROT) or continuous stocking method (CONT) of winter wheat (Triticum aestivum) and annual ryegrass (Lolium multiflorum) pastures on beef heifer and forage performance while maintaining a continuous stocking rate of 3.7 heifers/ha. Two experiments were conducted and analyzed separately due to confounding year and location. Heifer ADG and WG/ha tended to be increased by ROT compared …
Comparisons Of Physicochemical Properties Of Watermelon Juice Treated With Pulsed Electric Fields And Thermal Pasteurization, Lauren Nicole Cook
Comparisons Of Physicochemical Properties Of Watermelon Juice Treated With Pulsed Electric Fields And Thermal Pasteurization, Lauren Nicole Cook
LSU Master's Theses
Pulsed electric field (PEF) treatment is a non-thermal and alternative pasteurization treatment for fruit juices. PEF applies short pulses of electricity to a liquid food sample which inactivates microorganisms and enzymes. Thermal pasteurization is commonly used to pasteurize juice in the fruit juice industry but the process tends to deteriorate color, nutrients, and overall juice appearance. The overall goal of this study was to determine the effects of PEF treatment (30 kv/cm for 57 ìs in bipolar 2 ìs pulses at 22°C) on color, lycopene content, vitamin C content, pH, °Brix, and microbial count when compared with the effects of …
Essays On Environmental Issues Associated With The Diary Production Region In Louisiana, Larry Michael Hall
Essays On Environmental Issues Associated With The Diary Production Region In Louisiana, Larry Michael Hall
LSU Doctoral Dissertations
The Louisiana dairy production region (LDPR) is located in southeast Louisiana and includes five parishes (Tangipahoa, Washington, Livingston, St. Helena, and St. Tammany). It is home to approximately 90% of the state’s dairy industry and is a major contributor to nonpoint source pollution (NPS) in the area’s watershed through nitrogen, phosphorus, and sediment effluents. While point source (PS) effluents are easily identified and subject to federal and state regulations, NPS mitigation efforts must address uncertainties such as location of the NPS as well as stochastic parameters such as rainfall and its effect on nutrient and sediment flow. This dissertation presents …
Motivating Middle School Students To Be Physically Active: The Role Of Supportive Environments, Tao Zhang
Motivating Middle School Students To Be Physically Active: The Role Of Supportive Environments, Tao Zhang
LSU Doctoral Dissertations
It is clearly documented that promoting regular physical activity participation at young ages increases the likelihood that school-aged students will lead active lifestyles as adults. Unfortunately, more than a third of school-aged students do not engage in sufficient amounts of physical activity necessary to produce significant health benefits (USDHHS, 2000, 2008). Public health officials and physical educators highlight the importance of promoting motivation for physical activity by creating a supportive physical activity environment that should positively influence students’ choices to be physically active. The major objective of this dissertation was to explore the roles of supportive social environments and physical …
A Comparison Of Isotonic And Elastic Resistance Exercise On Trapezius Muscle Balance In Overhead Athletes, Phillip Page
A Comparison Of Isotonic And Elastic Resistance Exercise On Trapezius Muscle Balance In Overhead Athletes, Phillip Page
LSU Doctoral Dissertations
The scaption exercise (elevation of the arm in the scapular plane) is often performed in shoulder rehabilitation and preventive exercise programs. Three studies were performed to better understand the activation characteristics of the upper trapezius (UT) and lower trapezius (LT) muscles during scaption. The purpose of these studies was to 1) quantify and compare trapezius muscle activation ratios and onset of activation in normal subjects, 2) compare the findings from normal subjects with overhead athletes, and 3) compare the activation ratios and onset of the trapezius with 2 modes of resistance (elastic and isotonic) in overhead athletes. Methods. Healthy college-aged …
Evaluation Of Pectin Methylesterase And Lactobacillus Spp. Isolated From Tabasco Peppers (Capsicum Frutescens L.), Sonja Tanee Jones
Evaluation Of Pectin Methylesterase And Lactobacillus Spp. Isolated From Tabasco Peppers (Capsicum Frutescens L.), Sonja Tanee Jones
LSU Doctoral Dissertations
One of the major concerns of the hot sauce manufacturers is separation of sediments and layering of the sauce. Separation is an undesirable production condition because consumers view this as a defect which consequently increases manufacturing costs. Pectins play an important role in pepper processing since it forms gels and influences the final viscosity of the sauce. Hence, its integrity during processing influences the quality of the final product. Failures in pectin stability can sometimes be related to the presence of enzymes. Understanding how the pectin enzymes function during fermentation of pepper sauce is a necessary step in controlling the …
Modification Of Rice Starch Properties By Addition Of Amino Acids At Various Ph Levels, Rosaly Vallejo Manaois
Modification Of Rice Starch Properties By Addition Of Amino Acids At Various Ph Levels, Rosaly Vallejo Manaois
LSU Master's Theses
Amino acids were previously found to modify starch functionalities and potentially increase starch utilization. The effect of amino acids at different pH levels on the pasting properties, thermal characteristics, and resistant starch (RS) formation of rice starch was investigated. Prior to the analyses, pretreatment of starch was done by adding amino acid (aspartic acid, leucine, lysine and tyrosine) at 6% dry weight basis and dispersing the mixture in distilled water, solutions adjusted with HCl and NaOH to pH 4, 7 and 10, and buffers of acetate, phosphate and carbonate at the same pH levels, respectively. Samples in HCl/NaOH solutions were …
Louisiana Agriculture Fall, 2008, Lsu Agcenter
Louisiana Agriculture Fall, 2008, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Louisiana Agriculture Summer, 2008, Lsu Agcenter
Louisiana Agriculture Summer, 2008, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Xylose-Fermenting Yeast Species Found In The Wood Of Southeast Louisiana, Claire Reuter
Xylose-Fermenting Yeast Species Found In The Wood Of Southeast Louisiana, Claire Reuter
Honors Capstones
No abstract provided.
Characterization Of A Non-Cytoplasmically Localized Dps Protein From Deinococcus Radiodurans, Brian Reon
Characterization Of A Non-Cytoplasmically Localized Dps Protein From Deinococcus Radiodurans, Brian Reon
Honors Capstones
No abstract provided.
Feasibility And Desirability Of Ethanol Production In The State Of Louisiana, John David Barreca
Feasibility And Desirability Of Ethanol Production In The State Of Louisiana, John David Barreca
Honors Capstones
No abstract provided.
Hatchability Of End Of Lay Egg Production Broiler Breeder Eggs As Influenced By Prestorage Warming, Kyle Homan
Hatchability Of End Of Lay Egg Production Broiler Breeder Eggs As Influenced By Prestorage Warming, Kyle Homan
Honors Capstones
No abstract provided.
Toxic Gene Expression In Escherichia Coli Using Trpl As A Repressor, Ian Primm
Toxic Gene Expression In Escherichia Coli Using Trpl As A Repressor, Ian Primm
Honors Capstones
No abstract provided.
Polyphasic Taxonomy Of A Group Of Globally Dispersed, Desiccation-Resistant Strains Of The Microvirga/Balneimonas Cluster, Bradley Tolar
Polyphasic Taxonomy Of A Group Of Globally Dispersed, Desiccation-Resistant Strains Of The Microvirga/Balneimonas Cluster, Bradley Tolar
Honors Capstones
No abstract provided.
Modeling Electric Fields In Microfluidic Devices, Micah Fincher
Modeling Electric Fields In Microfluidic Devices, Micah Fincher
Honors Capstones
No abstract provided.
Louisiana Agriculture Spring, 2008, Lsu Agcenter
Louisiana Agriculture Spring, 2008, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
The Effects Of Epidermal Growth Factor And Basic Fibroblast Growth Factor On Cryopreserved Human Adipose Derived Stem Cells In Culture: Proliferation, Adipogenesis, And Osteogenesis, Teddi Leigh Hebert
Honors Capstones
No abstract provided.
Responses Of The Sea Catfish, Ariopsis Felis, To Chemical Defenses From The Sea Hare, Aplysia Californica, Sheybani Arman
Responses Of The Sea Catfish, Ariopsis Felis, To Chemical Defenses From The Sea Hare, Aplysia Californica, Sheybani Arman
Honors Capstones
No abstract provided.
Louisiana Agriculture Winter, 2009, Lsu Agcenter
Louisiana Agriculture Winter, 2009, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Estimating The Economic Impacts Of Hurricane Damage On Coastal Fishing Infrastructure, Tanza Erlambang
Estimating The Economic Impacts Of Hurricane Damage On Coastal Fishing Infrastructure, Tanza Erlambang
LSU Master's Theses
Two severe Hurricanes, Katrina and Rita, caused devastating damages in the northern Gulf of Mexico during late summer and early fall 2005. Louisiana was the most heavily impacted state, where both storms made initial landfall. The storms caused billions of dollars in damages to public and private infrastructure, with particularly strong impacts to coastal fishing businesses. Numerous assessments of coastal fisheries infrastructure damage were developed by state and federal agencies following the storms. The range of estimates varied greatly (from $275 million to $3.5 billion), because of a wide range of methods and assumptions. This study describes two alternative damage …
Characterizing The Epidemiology Of Bluetongue Virus Serotype One In South Louisiana, Michael Edward Becker
Characterizing The Epidemiology Of Bluetongue Virus Serotype One In South Louisiana, Michael Edward Becker
LSU Master's Theses
In November 2004, bluetongue virus (BTV) serotype 1 was detected for the first time in the U.S. from a hunter-killed deer in the marsh area of the Atchafalaya Delta in St. Mary Parish, LA. Subsequent serum surveys of three cattle farms further inland from the area where the deer was shot found bluetongue virus serotype 1 positive cattle on two of the three farms. The purpose of this study was to determine potential BTV vectors in the area where BTV-1 positive animals were detected and compare different trapping techniques for capturing specimens of the genus Culicoides. The study was conducted …
The Influence Of Calf Selenium Status On Gpx-1 And 3 Activity And Liver Gpx-1 Mrna, Genevieve Elizabeth Tanner
The Influence Of Calf Selenium Status On Gpx-1 And 3 Activity And Liver Gpx-1 Mrna, Genevieve Elizabeth Tanner
LSU Master's Theses
The purpose of this research was to determine the influence of dietary Se on glutathione peroxidase (GPx)-1 and 3 activities and relative liver GPx mRNA levels in growing Holstein bull calves. Calves (n = 14) were started 28 d after birth on either a Se adequate (0.15 ppm Se) or deficient (0.01 ppm Se) diet consisting of 3 growth phases and maintained on the diet until 180 d of age. Blood samples were taken from each calf for determination of GPx-1 and GPx-3 activity. Three calves were euthanized at d 21 of age for determination of baseline liver GPx-1 mRNA …
Effects Of Probiotics And Yeast Culture On Rumen Development And Growth Of Dairy Calves, Jennifer Marie Laborde
Effects Of Probiotics And Yeast Culture On Rumen Development And Growth Of Dairy Calves, Jennifer Marie Laborde
LSU Master's Theses
Forty-eight calves (heifers n=20, bulls n=28) were randomly assigned one of four dietary treatments which included no additive (C); the yeast culture Saccharomyces cerevisiae (YC); the probiotics Bacillus lichenformis and Bacillus subtilis (P); and both yeast culture and probiotics (YCP). Calves were administered treatments from day 2 to 56 in starter and from day 57 to 84 in grower diets. Body weights were measured at birth and weekly thereafter until day 112 of age. Wither and hip heights were measured weekly. Feed intake, water intake, and fecal scores were recorded twice daily until day 56. Rumen fluid was collected on …
Hatchability Of Post-Peak Egg Production Broiler Breeder Eggs As Influenced By Pre-Incubation Warming, Cameron Benjamin Wiggins Ii
Hatchability Of Post-Peak Egg Production Broiler Breeder Eggs As Influenced By Pre-Incubation Warming, Cameron Benjamin Wiggins Ii
LSU Master's Theses
This research was conducted to determine the effects of pre-incubation warming on the hatchability of post-peak egg production broiler breeder eggs. An experiment with six trials was conducted with 7,920 freshly laid eggs from Ross 308 and 708 broiler breeders from 61-67-wks of age. For each trial, 1,320 eggs were used to determine if pre-incubation warming treatments of 0, 2, 4, and 6, or 0, 3, 6, and 9, or 0, 9, 12 and 15 hrs (at 37.6°C) could improve the hatchability of eggs stored (at 15.5°C) for three days. After a storage period of three days, the eggs were …