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Articles 1801 - 1830 of 2496
Full-Text Articles in Life Sciences
Detection And Survival Of Escherichia Coli O157:H7 In Cattle Water Troughs And The Effects Of Cetylpyridinium Chloride Against Escherichia Coli O157:H7 Biofilms On The Surface Of Stainless Steel, Sajida Begum Plauche
Detection And Survival Of Escherichia Coli O157:H7 In Cattle Water Troughs And The Effects Of Cetylpyridinium Chloride Against Escherichia Coli O157:H7 Biofilms On The Surface Of Stainless Steel, Sajida Begum Plauche
LSU Doctoral Dissertations
Escherichia coli O157:H7 is an emerging food pathogen that was first identified as a cause of illness in 1982. According to CDC (The Center for Disease Control and Prevention) estimates, E. coli O157:H7 is responsible for about 73,000 illnesses, 2,000 hospitalizations and 60 deaths in the United States each year. Cattle are the principal reservoir of E. coli O157:H7. Contamination of feed and drinking water with cattle feces is an importance factor in the prevalence of infection in cattle which, in turn, results in contamination of food and the environment. Escherichia coli O157:H7 is a very persistent pathogen and has …
Inhibition Of Hormone Dependent And Independent Breast Cancer Cells By Oyster(Crassostrea Virginica) Ceramide, Madhavi Chintalapati
Inhibition Of Hormone Dependent And Independent Breast Cancer Cells By Oyster(Crassostrea Virginica) Ceramide, Madhavi Chintalapati
LSU Master's Theses
The purpose of this research was to investigate the in vitro and in vivo anti-angiogenic properties of ceramide isolated from oyster (Crassostrea virginica). Ceramide was isolated from oyster by silicic acid chromatography, purified by alkaline hydrolysis, and analyzed by electrospray ionization mass spectrometry (ESI-MS). In vitro, the activity of ceramide on human hormone-dependent (MCF-7) and hormone-independent (MDA-MB-435s) breast cancer cells was evaluated for cell viability and proliferation, VEGF-induced cell migration and invasion, apoptosis, and autophagy. The activity of ceramide was also evaluated for VEGF-induced human umbilical vein endothelial cells (HUVEC) tube formation. The protein levels of vascular endothelial growth factor …
Interrelationships Between Mitochondrial Function, Maximal Oxygen Consumption, Running Economy, And Diet In Elite Male And Female Runners, Ryan Peyton Mcmillan
Interrelationships Between Mitochondrial Function, Maximal Oxygen Consumption, Running Economy, And Diet In Elite Male And Female Runners, Ryan Peyton Mcmillan
LSU Master's Theses
The relationships between maximal oxygen consumption (VO2max), mitochondrial function and running economy were investigated in a population of twenty-one endurance trained males and females (range=18-54 yrs). The purposes of this study were: 1) to determine whether mitochondrial oxidative capacity, as defined by the maximal activities of citrate synthase (CS), cytochrome c oxidase (COX), and beta-hydroxyacyl-CoA dehydrogenase (BHAD), is a significant determinant of maximal oxygen consumption in endurance trained men and women, and 2) to observe the relationship between maximal oxygen uptake and running economy in the same population. Muscle biopsy samples were taken from the vastus lateralis prior to a …
Louisiana Agriculture Fall, 2005, Lsu Agcenter
Louisiana Agriculture Fall, 2005, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Species Limits Within The Mexican Garter Snakes Of The Thamnophis Godmani Complex, Douglas A. Rossman, Frank T. Burbrink
Species Limits Within The Mexican Garter Snakes Of The Thamnophis Godmani Complex, Douglas A. Rossman, Frank T. Burbrink
Occasional Papers of the Museum of Natural Science, Louisiana State University
The highly variable Thamniphis godmani complex of southern Mexico, comprised of four apparently allopatric populations, was examined by using 28 morphological characters scored on 214 specimens. Character values were tested with univariate and multivariate statistics to determine if populations are morphologically distinct. The results suggest that the four populations represent independently evolving lineages. Four species, three previously undescribed, are recognized in the T. godmani complex. A lectotype is designated for T. godmani. For each species, a diagnosis description of holotype or lectotype, summary of interspecific variation, and statement of distribution are provided. Comparisons are made with T. errans, alleged to …
Louisiana Agriculture Summer, 2005, Lsu Agcenter
Louisiana Agriculture Summer, 2005, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Microfluidics Fabrication And Testing For A Novel Biomems Cell Counting Device, Marly N. Dows
Microfluidics Fabrication And Testing For A Novel Biomems Cell Counting Device, Marly N. Dows
Honors Capstones
No abstract provided.
Characterization Of The Domain-Domain Interactions And Dna Binding In The Saccharomyces Cervisiae Hmcb Protein, Hmo1, Kevin Thomas Bauerle
Characterization Of The Domain-Domain Interactions And Dna Binding In The Saccharomyces Cervisiae Hmcb Protein, Hmo1, Kevin Thomas Bauerle
Honors Capstones
No abstract provided.
Effects Of Type Of Instruction On Ground Reaction Forces In Jump Landing, Janet Leu
Effects Of Type Of Instruction On Ground Reaction Forces In Jump Landing, Janet Leu
Honors Capstones
No abstract provided.
Louisiana Agriculture Spring, 2005, Lsu Agcenter
Louisiana Agriculture Spring, 2005, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Functional Genomics Of Carboxyltransferase, Nathan R. Ranney
Functional Genomics Of Carboxyltransferase, Nathan R. Ranney
Honors Capstones
No abstract provided.
Louisiana Agriculture Winter, 2005, Lsu Agcenter
Louisiana Agriculture Winter, 2005, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Evaluation Of Lutein And Protein In Ozone Treated Corn, Yu Wang
Evaluation Of Lutein And Protein In Ozone Treated Corn, Yu Wang
LSU Master's Theses
The present study was conducted to determine the influence of an ozonation process on lutein and protein in clean and contaminated corns. This study aimed (1) to determine the levels of antimutagenic compounds to aflatoxin in corn before and after ozonation; (2) to verify the antimutagenic potential of these compounds against aflatoxin using the Ames test; and (3) to evaluate proteins in the corn before and after ozonation. HPLC was used to separate and identify the lutein in corn. Nitrogen analysis and SDS-PAGE were used to analyze protein content and molecular weights in corn. Clean ozone-treated corn had a total …
Autonomic Nervous System Modulation Of The Heart Following A High Carbohydrate Liquid Meal, Calynn Davis Bunol
Autonomic Nervous System Modulation Of The Heart Following A High Carbohydrate Liquid Meal, Calynn Davis Bunol
LSU Master's Theses
The involvement of the sympathetic nervous system in the pathology of obesity has long been a debate among researchers. Various methods of capturing the resting sympathetic activity as well as the response of the sympathetic activity elicited by the introduction of a meal or a bout of exercise in both lean and obese individuals have been investigated. This study examined the autonomic modulation of the heart following a high carbohydrate liquid meal in various body types. Twenty-five females with body mass indexes [weight (kg)/height2(m)] ranging from 19.3-39.5 were grouped according to relative basal energy expenditure adjusted for lean …
Reproductive Characteristics Of High Body Condition Mares With High Versus Low Leptin Concentrations, Cara A. Waller
Reproductive Characteristics Of High Body Condition Mares With High Versus Low Leptin Concentrations, Cara A. Waller
LSU Master's Theses
Two experiments were performed to discover what, if any, reproductive differences exist in high body condition (BCS) mares with varying concentrations of leptin. Previous research showed that mares with high body condition scores can have a range of leptin levels, from very low (<5 ng/mL) to very high (>10 ng/mL). Earlier results indicated that most mares with high body condition scores maintain estrous cycles or show significant follicular activity during the winter. Among these high BCS mares, about 30% of them exhibit hyperleptinemia and hyperinsulinemia. The first experiment was designed to compare the reproductive characteristics of high BCS mares with high versus low leptin …
Hemodynamic And Ocular Responses To Caloric Stimulation And Age-Related Disparities, Melissa J. Deveer
Hemodynamic And Ocular Responses To Caloric Stimulation And Age-Related Disparities, Melissa J. Deveer
LSU Master's Theses
Age-related declines in vestibular function affect balance and coordination in older adults. Of perhaps equal importance, but less understood, are the potential implications of vestibular degeneration on cardiovascular homeostasis. Recent evidence suggests that the semi-circular canals, a section of the vestibular system, may be involved in the vestibulosympathetic reflex (VSR), but the extent to which the aging of the semi-circular canals interferes with cardiovascular homeostasis is unknown. Activation of the intact VSR results in increases in tonometric blood pressure (TBP) and heart rate (HR) as well as decreases in cardiac output (Q) and pre-ejection period (PEP). The purpose of this …
An Examination Of U.S. Rice Export Promotion Programs, Yiqian Wang
An Examination Of U.S. Rice Export Promotion Programs, Yiqian Wang
LSU Master's Theses
The United States Department of Agriculture’s Foreign Agricultural Service (USDA/FAS) administers two primary promotion programs for rice exports: the Foreign Market Development Program (FMDP) and the Market Access Program (MAP). Based on the literature, a single equation framework is specified to estimate the rice import demand model. Three major U.S. rice importing countries are selected: Mexico, Costa Rica, and Honduras. Single equation analysis methods are applied. The effectiveness of the two programs for rice exports to the Latin American markets is evaluated. Promotion programs and the competitors’ exchange rate as primary explanatory variables for the U.S. rice import demand in …
Differences Between Targeted And Measured Body Weight Support With The Usage Of A Body Weight Support System, Robin Cropper
Differences Between Targeted And Measured Body Weight Support With The Usage Of A Body Weight Support System, Robin Cropper
LSU Master's Theses
The purpose of the study was to determine if the body weight support system (BWSS) maintains the targeted percentage of the subject's body weight support (BWS) during walking and to explore the relationship between unloading and ground reaction force. Sixteen healthy college students (mean age: 22 years old) were recruited as subjects. Tests were conducted using an instrumented treadmill with a BWSS. The BWSS harness was secured around the lower abdomen and pelvis of each subject for effective body weight support. Vertical ground reaction force was measured by force platforms embedded in the treadmill. A force sensor was attached to …
Oxidation Of Sugarcane Bagasse Using A Combination Of Hypochlorite And Peroxide, Yong-Jae Lee
Oxidation Of Sugarcane Bagasse Using A Combination Of Hypochlorite And Peroxide, Yong-Jae Lee
LSU Master's Theses
Sugarcane bagasse is a source of lignocellulosic biomass. It is a potential renewable energy source for ethanol production. It is naturally cheap, plentiful and has high cellulose content. The sugarcane bagasse contains 34.5% cellulose, 24% hemicellulose, and 22-25% lignin. Reactive Oxygen Species (ROS), singlet oxygen (1O2), superoxide (O2-), hydroxyl radicals (OH?, and hypochlorite ion (OCl-), were found to remove both hemicellulose and lignin from sugarcane bagasse. Ox-B (Day. 2004, US Patent 6,866,870), a solution of sodium hypochlorite and hydrogen peroxide, was studied for its effectiveness as a pretreatment for lignocellulosic biomass. The cellulose structure of the bagasse was easily separated …
L-Glutamine Supplementation: Effects On Recovery From Exercise, Tavis Joseph Piattoly
L-Glutamine Supplementation: Effects On Recovery From Exercise, Tavis Joseph Piattoly
LSU Master's Theses
Clinical evidence supports the use for exogenous glutamine in the maintenance of muscle mass and immune system function in critically ill patients. Relatively little research has examined the benefits of glutamine for athletes engaged in heavy exercise training, despite a possible link between overtraining and glutamine. PURPOSE: To examine the influence of Glutamine on time to exhaustion and power after a prolonged bout of exercise. METHODS: Twelve men (Age: 19 to 30y) involved in cycle training were asked to participate in the study. All participants performed a Symptom-Limited Graded Exercise Test (SL-GXT) using the Astrand Cycle protocol. On a subsequent …
Seasonal Abundance And Detection Of West Nile Virus In Ceratopogonids (Diptera: Ceratopogonidae) In East Baton Rouge Parish, Louisiana, Isidra Joselina Sabio
Seasonal Abundance And Detection Of West Nile Virus In Ceratopogonids (Diptera: Ceratopogonidae) In East Baton Rouge Parish, Louisiana, Isidra Joselina Sabio
LSU Master's Theses
The seasonal abundance and species composition of ceratopogonids (Diptera: Ceratopogonidae) in East Baton Rouge parish was described from light trap collections at 15 sites. A total of 4,968 collections were processed, and 48,667 ceratopogonids were collected from 20 November, 2002 through 25 November, 2004. Three genera of ceratopogonids (Forcipomyia Meigen, Atrichopogon Kieffer, and Culicoides Latrielle) and a total of 18 species of the genus Culicoides were identified. Ceratopogonids had distinctive spring and fall population peaks. Ceratopogonids were collected in every month during the study, with the exception of February 2004. These results suggest that certain species of Culicoides may …
Export-Led Growth In Honduras And The Central American Region, Hermann Castro Zuniga
Export-Led Growth In Honduras And The Central American Region, Hermann Castro Zuniga
LSU Master's Theses
This thesis examines the validity of the export-led growth (ELG) hypothesis in Honduras and compares the Honduran experience to that of other Central American countries, specifically Costa Rica, El Salvador, Guatemala and Nicaragua. It further evaluates the ELG hypothesis for the agricultural sector of Honduras. The conceptual model incorporates exports into a Cobb-Douglas production function and formulates dynamic econometric models of real gross domestic product (GDP), real gross fixed capital formation (GFCF), labor and real exports for the 1970-2000 period. To test for the validity of the ELG hypothesis, Granger-causality was tested on the export coefficients of the growth equation …
Vinegar Fermentation, San Chiang Tan
Vinegar Fermentation, San Chiang Tan
LSU Master's Theses
Traditionally, the manufacture of vinegar provided a means of utilizing a large proportion of the cull fruit from apple-packing establishments and the waste from apple processing facilities. Most vinegar is now produced from distilled grain alcohol. Vinegar may be defined as a condiment made from various sugary and starchy materials by alcoholic and subsequent acetic fermentation. The vinegar bacteria, also called acetic acid bacteria, are members of the genus Acetobacter and characterized by their ability to convert ethyl alcohol (C2H5OH) into acetic acid (CH3CO2H) by oxidation. Vinegar can be produced from various raw materials like distilled alcohol, wine, rice wine …
Development Of Non-Dairy Frozen Dessert Containing Soy Protein And Coconut Milk, Luciana Soler
Development Of Non-Dairy Frozen Dessert Containing Soy Protein And Coconut Milk, Luciana Soler
LSU Master's Theses
As consumers have pursued healthier lifestyles in recent years, consumption of soy foods has risen steadily, encouraged by scientific studies showing health benefits from these products. There is a large market for ice cream in the United States. However, since ice cream contains dairy ingredients, a number of Americans are not able to consume it because of dietary habits due to religious beliefs, lactose intolerance, vegetarianism or other related ideologies. For years, these groups of consumers have been able to substitute ice cream with frozen desserts containing soy protein as a substitute for milk protein, but never in the United …
Ozone Degradation Of Off-Flavors In Catfish, Tameka Lashon Dew
Ozone Degradation Of Off-Flavors In Catfish, Tameka Lashon Dew
LSU Master's Theses
In the United States aquaculture is a billion dollar industry. Aquaculture is essentially the production of aquatic organisms under controlled conditions. Although conditions are controlled to a certain degree, absolute control is not possible. This reason alone is a huge problem that can cost the industry millions of dollars a year. In catfish, geosmin and 2-methylisoborneol are two compounds are primarily responsible for imparting a musty/earthy off-flavor. Off- flavors are secondary metabolites of some blue-green algae and actinomycete bacteria. When present in fish tissue they create an undesirable taste. Different approaches have been used in order to alleviate the problem …
Development, Evaluation And Characterization Of Protein-Isoflavone Enriched Soymilk, Janette Ethel-Pessi Saidu
Development, Evaluation And Characterization Of Protein-Isoflavone Enriched Soymilk, Janette Ethel-Pessi Saidu
LSU Doctoral Dissertations
Adequate provision of soy isoflavone and protein in soybean products is essential in meeting the soy health claim and the promotion of a healthy product. Commercial soymilks contain inadequate amounts of protein and isoflavone to meet the FDA recommended 25g and 40-50mg/day level, respectively, in 1-2 servings. This research study set out to investigate the possibility of producing a protein-isoflavone enriched (PIE) soymilk by incorporating soy germ in soymilk to provide the recommended FDA level in 1-2 servings. Three PIE soymilks containing 25 (SG25), 30 (SG30), and 35% (SG35) germ were prepared and compared to 100% whole soybean milk (WSB-control) …
Regulation Of Glucose Metabolism In Dairy Cattle, Christie Cheatham Stanley
Regulation Of Glucose Metabolism In Dairy Cattle, Christie Cheatham Stanley
LSU Doctoral Dissertations
The experiments described herein are designed to elucidate many metabolic changes that occur to regulate the partitioning of nutrients between production and animal maintenance with particular regard to glucose metabolism and insulin sensitivity. The onset of milk production and parturition causes dramatic stress to the cow. The challenge of improving metabolism during this period is being addressed by nutritional management with the possibility of the addition of supplements. The use of Ca-propionate as a supplement did not affect glucose metabolism in transition cows. The data revealed that insulin sensitivity was low during the transition period, but the tissue responses to …
The Role Of Teachers' Self-Efficacy In Increasing Children's Physical Activity, James Frederick Roth
The Role Of Teachers' Self-Efficacy In Increasing Children's Physical Activity, James Frederick Roth
LSU Doctoral Dissertations
It is well documented that elementary school children do not participate in recommended amounts of physical activity, and that elementary physical education programs generally are unable to insure that children engage in appropriate amounts of activity. One solution to this dilemma is to increase children’s activity levels through collaborative efforts such as whole school programs involving the classroom teachers. If this approach is to be successful, it is important to investigate ways that elementary classroom teachers can be actively involved in school level programs that will ultimately increase children’s physical activity levels. Elementary classroom teachers are often responsible for at …
Revision Of Pocadius Erichson (Coleoptera: Nitidulidae), Andrew R. Cline
Revision Of Pocadius Erichson (Coleoptera: Nitidulidae), Andrew R. Cline
LSU Doctoral Dissertations
A revision of Pocadius Erichson (Coleoptera: Nitidulidae) was completed. A total of 46 species were (re)described, including 25 new species, a key to species constructed, and phylogenetic analysis performed. Taxonomic changes, including nomenclatural emendations, reinstatement of species, and description of new taxa, within this dissertation do not constitute formal changes as defined by the International Code of Zoological Nomenclature. Illustrations of the genitalia, key characters, and dorsal habitus of species are provided. The phylogeny demonstrates a monophyletic Pocadius. The phylogeny suggests a Palearctic origin of the genus with subsequent speciation into the Old World tropics and New World. Host specialization …
Health And Lifestyle Profiles Across The Lifespan: Results From The Louisiana Healthy Aging Study, Madlyn Irene Frisard
Health And Lifestyle Profiles Across The Lifespan: Results From The Louisiana Healthy Aging Study, Madlyn Irene Frisard
LSU Doctoral Dissertations
Aging and age related disease affects individuals differently. One possible explanation could be free radical production varies among individuals and this variation determines the aging process and the progression of disease. The purpose of this study was to test whether nonagenarians have a relatively low metabolic rate when compared to younger individuals and whether this low metabolic rate is associated with lower levels of oxidative stress and less incidence of disease. Resting metabolic rate (RMR), markers of oxidative stress to lipids, proteins, and DNA, components of the metabolic syndrome, and physical activity level were measured in 3 groups of individuals …