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Articles 1 - 30 of 62
Full-Text Articles in Life Sciences
Weight History, Perception Of Body Size, And Self-Rated Physical And Mental Health In Black Female Food Stamp Recipients Living In Southeast Louisiana, Catharine Grace Wolfe
Weight History, Perception Of Body Size, And Self-Rated Physical And Mental Health In Black Female Food Stamp Recipients Living In Southeast Louisiana, Catharine Grace Wolfe
Honors Theses
No abstract provided.
Isolation And Characterization Of T-Dna Insertional Mutations In Arabidopsis Thaliana And Its Use In Determining Siamese, Taylor S. Gwin
Isolation And Characterization Of T-Dna Insertional Mutations In Arabidopsis Thaliana And Its Use In Determining Siamese, Taylor S. Gwin
Honors Theses
No abstract provided.
The Effects Of Resistant Starch And Fructooligosaccharides On Mineral Absorption In Rats, Katherine Ann Nolen
The Effects Of Resistant Starch And Fructooligosaccharides On Mineral Absorption In Rats, Katherine Ann Nolen
Honors Theses
No abstract provided.
An Analysis Of Marginal Effects Of Land Characteristics And Purchase Factors On Rural Land Values In North Louisiana, Rebecca Summers Mclaren
An Analysis Of Marginal Effects Of Land Characteristics And Purchase Factors On Rural Land Values In North Louisiana, Rebecca Summers Mclaren
LSU Master's Theses
Hedonic models estimate the marginal effect of land characteristics and factors that contribute to a purchase decision on rural land values in submarkets of north Louisiana. While size of tract and mix of land use have expected impacts on rural land values, forces that motivate the buyer also affect price. The natural resource endowment of each of the three submarkets in this study differs significantly from one another. Topography has clearly identifiable impacts on crop selection and income in each submarket. Additionally, the relative location of the submarkets to major metropolitan areas is influential on rural land values in one …
Quality Evaluation Of Cheddar Cheese Containing Gamma-Oryzanol, Miguel Ángel Gutiérrez
Quality Evaluation Of Cheddar Cheese Containing Gamma-Oryzanol, Miguel Ángel Gutiérrez
LSU Master's Theses
Health benefits from consuming rice bran oil (RBO) have been extensively studied in humans. RBO has been shown to decrease cholesterol absorption by inhibiting the oxidation of the LDL-cholesterol. Gamma-Oryzanol is one of the RBO components that possess antioxidative properties; it is a polyphenolic compound resembling tocopherol (vitamin E), which is another component of RBO. There are evidences that oryzanol has potential applications for enhancing shelf-life of foods containing fats processed at a high temperature, decreasing the total cholesterol, LDL-cholesterol and triglyceride levels in plasma lipids, and healing ulcers. In order to take advantage of the health benefits of oryzanol, …
Cryopreservation Of Bovine And Caprine Oocytes By Vitrification, Sabrina Marie Luster
Cryopreservation Of Bovine And Caprine Oocytes By Vitrification, Sabrina Marie Luster
LSU Master's Theses
Cryopreservation of animal oocytes will permit germplasm of valuable or unique females to be preserved for extended times. The objective of this research was to derive a procedure to cryopreserve bovine oocytes by vitrification to be used as recipients for somatic cell nuclear transfer (SCNT). Caprine oocytes vitrified by the same procedure were assayed by cytological examination of microtubules. In the first two of three experiments, bovine oocytes matured in vitro were vitrified in a mixture of ethylene glycol (EG), dimethylsulfoxide (Me2SO) and trehalose, and then subjected to in vitro fertilization (IVF) or SCNT. For vitrification, oocytes were first exposed …
Evaluation Of The Relationship Between Venous Function And Post Exercise Oxygen Consumption Recovery Kinetics, Eric Joseph Tisdell
Evaluation Of The Relationship Between Venous Function And Post Exercise Oxygen Consumption Recovery Kinetics, Eric Joseph Tisdell
LSU Master's Theses
Excess post-exercise oxygen consumption (EPOC) has been attributed to metabolic, hemodynamic, neuroendocrine, and pulmonary factors. In one particular study, Barclay (J Appl Physiol 1986;61(3):1084-90) suggested that a lower rate of fatigue and hyperperfusion following a bout of exercise was due to a mechanism other than increased oxygen and substrate delivery. Interestingly, few studies have examined the influence of venous function on EPOC. The purpose of this study was to examine the relationship between measures of vascular function and EPOC. Measures of vascular function and VO2 recovery kinetics were examined in 20 individuals [age=22+2.41 yrs]. Nondominant forearm arterial inflow, venous capacitance …
Effects Of Aerobic And Anaerobic Training Protocols On 4000m Track Cycling Time Trial, William Mathieu Cheramie
Effects Of Aerobic And Anaerobic Training Protocols On 4000m Track Cycling Time Trial, William Mathieu Cheramie
LSU Master's Theses
The aim of this study was to determine whether performance in a 4000m individual pursuit could be significantly influenced by training protocols that are solely based in either aerobic/distance training, or anaerobic/sprint training. Faina et al., (1989) and Neuman et al. (1992) have found, using professional track cyclist that there appears to be a split in energy pathways used to perform the event. Their results indicate that 20% of the workload is achieved via anaerobic metabolism and the remaining 80% are achieved through aerobic metabolism. Group #1, followed a training protocol modeled after repeated, short duration, (<1:30.00s/1000m), high intensity sprinting. This particular training protocol may serve to utilize a greater proportion of its allotted time by generating beneficial metabolic adaptations that may possibly improve the subjects performance in the 4000m individual pursuit. Group #2, trained primarily through aerobic means, followed the "more traditional" training method for such an event. This protocol consisted of cycling intervals of distances proportionally longer (>4000m) than that …
The Use Of Altrenogest To Control Reproductive Function In Beef Cattle, Clarence Edward Ferguson
The Use Of Altrenogest To Control Reproductive Function In Beef Cattle, Clarence Edward Ferguson
LSU Doctoral Dissertations
There has been great controversy involving progesterone (P4) levels during early pregnancy in cattle. The objectives of these experiments were to determine the effect of an early low dose administration of P4 or altrenogest (ALT) on pregnancy rates in repeat breeder (RPB) females, if an increase in pregnancy rates could result from a direct effect of P4 on the embryo and if ALT could support pregnancy in the absence of a functional CL. Firstly, ALT was evaluated for use as a progestin in cattle by synchronizing estrus in beef heifers. There were no differences in the …
An Examination Of The Relationship Between Psychological Conditions And The Incidence Of Athletic Injury, Gregory A. Penczek
An Examination Of The Relationship Between Psychological Conditions And The Incidence Of Athletic Injury, Gregory A. Penczek
LSU Master's Theses
The purpose if this investigation was to examine injury rates among college athletes with a diagnosed psychological condition/mental disorder. Participants were drawn from a pool of 440 male and female intercollegiate athletes (ages 18-26 years). All subjects with a psychological disorder were then identified (n=38) and placed in the diagnosis group. A second group was then selected, which consisted of matched pairs of athletes without a psychological diagnosis. Twelve sports were represented in the sample population with an equal number of male (n=26) and female (n=12) participants in each group. The athletic training database was examined via query to identify …
Development Of Chicken Polyclonal And Mouse Monoclonal-Based Enyzyme Immunoassays For The Detection Of Β-Cyclocitral In Catfish Pond Water, Cate Nakaweesa Munene
Development Of Chicken Polyclonal And Mouse Monoclonal-Based Enyzyme Immunoassays For The Detection Of Β-Cyclocitral In Catfish Pond Water, Cate Nakaweesa Munene
LSU Doctoral Dissertations
The Catfish industry faces a problem of off-flavors due to odorous compounds produced by cyanobacteria and blue-green algae. Beta-Cyclocitral imparts a hay-woody odor to pond water and fish tissues. At present there are no reliable pond treatment methods available to control these off-flavors. To monitor the levels of this compound for quality control, rapid, sensitive and inexpensive methods are needed. The major goal of this study was to develop enzyme-linked immunoflow assays based on monoclonal and polyclonal antibodies that are specific and sensitive enough to detect beta-cyclocitral in catfish pond water. Beta-Cyclocitral-PPD conjugate was prepared and used to immunize two …
Hemodynamic Responses Following Dynamic Resistance Exercise In Young And Older Adult Women, Rafael Antonio Reyes
Hemodynamic Responses Following Dynamic Resistance Exercise In Young And Older Adult Women, Rafael Antonio Reyes
LSU Doctoral Dissertations
This investigation examined the effects of age, exercise and test condition on hemodynamic variables, autonomic and vascular function in relation to resistance exercise (RE). The associations among these variables were also examined. METHODS: Sixteen young (21.4+1.4 yrs) and 16 older (69.7+3.9 yrs) women performed 5- and 15- repetition maximal (RM) of knee extension RE. Continuous blood pressure (BP) and electrocardiography (ECG) data were recorded. The dependent variables are reported at pre-exercise, peak exercise and recovery period. Heart rate variability data were derived from 5- and 10-min segments before and after exercise. Resting and after arterial occlusion forearm vascular function indices …
Integration Of Management Tactics For The Rice Water Weevil Lissorhoptrus Oryzophilus Kuschel With Particular Emphasis On Use Of Plant Resistance (Tolerance), Li Zou
LSU Doctoral Dissertations
Studies were conducted to test the hypothesis, significant benefits can be achieved for the management of rice water weevil, Lissorhoptrus oryzophilus Kuschel, by the use of rice varieties with low levels of host plant resistance coupled with the judicious use of cultural practices and insecticides. Tolerant traits of a current commercial variety of rice, "Bengal", was manifested consistently over multiple years. Study on rice growth as effected by weevil injury showed that pruning of root systems by larvae of weevil resulted in a decrease in tiller number and shoot biomass of rice plants in the vegetative stage of growth. Yield …
The Non-Phosphorus Effects Of Dietary Phytase In Swine And Poultry, Jason Layne Shelton
The Non-Phosphorus Effects Of Dietary Phytase In Swine And Poultry, Jason Layne Shelton
LSU Doctoral Dissertations
This research was conducted to determine the non-phosphorus effects of phytase in diets for swine and poultry. An experiment was conducted to determine the effect of phytase addition on energy availability and protein and fat deposition in growing pigs. Results from this experiment indicated that phytase had small positive effects on energy availability, protein deposition, and fat deposition. In this study, 23 of 29 response variables were at least numerically increased with phytase addition. Two experiments were conducted to determine the accuracy of the energy and amino acid matrix values for Natuphos 1200 in broilers from 0 to 21 or …
Somatic Cell Interspecies Nuclear Transfer, Marina Julia Sansinena
Somatic Cell Interspecies Nuclear Transfer, Marina Julia Sansinena
LSU Doctoral Dissertations
The low efficiency of the nuclear transfer (NT) procedure requires large number of oocytes to produce embryos and live offspring. A series of experiments were conducted to evaluate the ability of the bovine cytoplast to reprogram nuclei from horses and llamas. In a preliminary study, equine oocytes from small (<20mm diameter) follicles were either pretreated with roscovitine or placed in maturation (IVM only) prior to NT. Roscovitine pretreatment did not improve nuclear maturation rates (roscovitine pretreatment 57% vs. IVM only 66%) and no fusion was obtained from roscovitine-pretreated oocytes after NT. Another preliminary study was conducted with the objective to produce llama NT embryos and to compare their development in two in vitro culture conditions (G1.2® vs. CR1aa). No difference was found in the number of embryos cleaved after 2 d of culture. This resulted in the first scientific report of somatic cell NT, in vitro culture and transfer of NT embryos in the llama. In the next experiment, adult horse and llama fibroblasts were injected into enucleated cow oocytes. The results showed the cow cytoplasm is capable of partially reprogramming nuclei from other species and support mitotic divisions. However, this study also showed a consistent embryonic developmental arrest at the 8- to 16- cell stage when horse or llama donor cells were used as donor nuclei. When a more closely related species of donor cell (banteng) and recipient oocyte (domestic cattle) were used for NT, no embryonic developmental arrest was found. Embryos progressed to achieve high blastocyst rates (banteng male cell line 28% vs. banteng female cell line 15%). Two banteng interspecies NT pregnancies were established and subsequently lost from the banteng male cell line. In the final study, the effect of a mixed mitochondrial population (heteroplasmy) on early embryonic development was investigated. Ooplasmic transfer performed in combination with NT procedure indicated presence of foreign mitochondria clustered in a small portion of the cytoplasm in early stages of embryo development. When goat ooplasm was transferred into interspecies (cow oocyte-goat donor cell) NT embryos, fusion and cleave rates were reduced suggesting an increased level of heteroplasmy or nuclear-ooplasmic incompatibilities.
Evaluating International Agricultural Trade In Central America: Three Analyses, Jose Roberto Andino
Evaluating International Agricultural Trade In Central America: Three Analyses, Jose Roberto Andino
LSU Doctoral Dissertations
A case study framework was used to study the competitiveness of Honduran coffee with major importing partners, along with an import demand analysis. Several important points summarize the findings. First, trends in green coffee supply and consumption continue to depress world coffee prices, making the production of coffee less attractive. Since small coffee producing countries, like Honduras, cannot affect the international price, they must improve efficiency, productivity, employ cost reduction techniques, and rely on the promotion of specific product attributes to remain competitive. Second, increased market share of Honduran coffee in major importing markets, Germany, Japan, and the U.S. was …
Evaluation Of Injury And Management Strategies For Stink Bugs (Heteroptera: Pentatomidae) On Cotton, Gossypium Hirsutum L., Melissa Marie Willrich
Evaluation Of Injury And Management Strategies For Stink Bugs (Heteroptera: Pentatomidae) On Cotton, Gossypium Hirsutum L., Melissa Marie Willrich
LSU Doctoral Dissertations
The effects of brown stink bug, Euschistus servus (Say), and southern green stink bug, Nezara viridula (L.), feeding on pre-flowering, flowering, and senescing cotton, Gossypium hirsutum L., plants were evaluated in field studies. Vegetative stage seedlings and flower buds (squares) were not significantly injured by adults or nymphs of either species in no-choice studies. Brown stink bug adults induced boll abscission, and reduced seedcotton yield and seed germination in bolls accumulating „T 350, „T 550, and 101 to „T 600 heat units beyond anthesis, respectively. In free-choice tests, boll preference was evaluated during each of the initial five weeks of …
The Control, Survival, And Growth Of Listeria Monocytogenes On Food Products, Richelle Lynn Beverly
The Control, Survival, And Growth Of Listeria Monocytogenes On Food Products, Richelle Lynn Beverly
LSU Doctoral Dissertations
Listeria monocytogenes, a ubiquitous foodborne pathogen, was recognized over 70 years ago. It is the source of the human disease listeriosis. The majority of Listeria monocytogenes that have been isolated from food product or human cases are of the serotypes ½ a, ½ b and 4b. Due to the recent outbreaks, recalls and deaths associated with Listeria monocytogenes in ready-to-eat meat products, the United States Department of Agriculture (USDA), Food Safety and Inspection Service (FSIS) on October 2, 2003 issued a directive for the control of Listeria monocytogenes on ready-to-eat products. The ready-to-eat food industry must impose a post-lethality treatment …
Species Diversity And Biogeography Of Ants (Hymenoptera: Formicidae) In Louisiana With Notes On Their Ecology, Shawn T. Dash
Species Diversity And Biogeography Of Ants (Hymenoptera: Formicidae) In Louisiana With Notes On Their Ecology, Shawn T. Dash
LSU Master's Theses
Over three decades have passed since the completion of Moser and Blum's (1960) treatment of the ants of Louisiana. This research represents a significant contribution to and update of their work. I report the first-ever comprehensive assessment of the Louisiana Formicid fauna. More than 100 species from 38 genera and eight subfamilies are covered. This faunistic survey gives valuable data of biodiversity and macro/microhabitat selection of ant species. Included are keys to all subfamilies, genera, and species with illustrations photographs, and a regional map for each species.
Isolation Of Aflatoxin-Free Lutein From Aflatoxin-Contaminated Corn, Evdokia Menelaou
Isolation Of Aflatoxin-Free Lutein From Aflatoxin-Contaminated Corn, Evdokia Menelaou
LSU Master's Theses
Lutein (3,3’-dihydroxy-alpha-carotene) has been identified by the Age-Related Eye Disease Study (AREDS) of the National Institute of Health (NIH) as a dietary compound with the ability to delay the onset and/or progression of age-related and/or diabetes-related vision loss. Lutein can also be useful in the prevention of other angiogenic diseases such as breast and colon cancer. Although marigold (Tagetes erecta) flowers are an excellent source of lutein, corn (Zea mays) has been identified as a very economical source of lutein because more value-added products, such as lutein, oil, and zein (known for its anti-microbial and anti-hypertensive activities) can be isolated …
Fecal Steroid Excretion Of Rats Fed Rice Bran Oil And Oryzanol, Zhaoli Dai
Fecal Steroid Excretion Of Rats Fed Rice Bran Oil And Oryzanol, Zhaoli Dai
LSU Master's Theses
Rice bran oil (RBO) has been considered healthy cooking oil with potent effects to reduce the risks of atherosclerosis and coronary heart disease. The relatively high level of unsaponifiable components contributes to the healthy benefits of RBO. This study investigated the possibility that the cholesterol-lowering effects of oryzanol are through increased fecal steroid excretion. The objective was to compare fecal cholesterol and bile acid excretion as well as bioavailability among different forms of oryzanol. The correlation between bioactivity and bioavailability of oryzanol was investigated as well. Forty-seven female breeder rats were used as animal models. Oryzanol was added to an …
Bees Associated With Louisiana Longleaf Pine Savannas, Chanda Sara Bartholomew
Bees Associated With Louisiana Longleaf Pine Savannas, Chanda Sara Bartholomew
LSU Master's Theses
Longleaf pine savannas are perhaps the most threatened ecosystems in North America. Despite a well documented and highly diverse flora, little has been published on insects in general and, in particular, on bees that provide the valuable service of plant pollination. Thus, the aims of this study were to: 1) survey bees found in two savanna types in southeastern Louisiana; and 2) contrast the diversity and species composition of these two savanna types. An ancillary goal was to contrast two collecting protocols for bees in the savanna habitat. Overall, a total of 3,407 bees were collected representing 125 species. Of …
Consumer Sensory Characteristics Of Butter Cake Made From Wheat And Rice Flours, Ashley Elizabeth Bond
Consumer Sensory Characteristics Of Butter Cake Made From Wheat And Rice Flours, Ashley Elizabeth Bond
LSU Master's Theses
Rice is an important commodity in Louisiana and throughout the world. During the milling process, about 15% of rice kernels become broken. Louisiana produced approximately 2,011,000 hundred weights of broken rice kernels in 2002. Converting broken rice into rice-based products adds dollars back to broken rice. The market potential for rice in processed foods is huge. In the refrigerated and frozen baked foods category, it is approximately $14.3 billion; while in the baked snack foods and wholesale bakery foods category, it is approximately $31.4 billion. Approximately 1-2% of the United States population suffers from Celiac Spruce Disease, which is a …
Identification Of Bacterial Pathogens Causing Panicle Blight Of Rice In Louisiana, Xianglong Yuan
Identification Of Bacterial Pathogens Causing Panicle Blight Of Rice In Louisiana, Xianglong Yuan
LSU Master's Theses
Four hundred and two bacterial isolates isolated on the semi-specific S-PG medium from diseased rice tissues showing symptoms of panicle blighting. These isolates were purified using serial dilution in sterile water and replating on S-PG medium. A total of 420 single isolates were obtained. These isolates were subjected to pathogenicity tests on rice (Oryza sative L. cv. Cypress). Based on these tests, 339 isolates were used in BiologTM tests and identified to the species level. Bacterial strains from 39 species in 16 genera were identified, including 52 isolates representing15 Pseudomonas species and 261 isolates representing six Burkholderia species. The remaining …
Spatial Econometric Analysis Of Louisiana Rural Real Estate Values, Patricia Soto
Spatial Econometric Analysis Of Louisiana Rural Real Estate Values, Patricia Soto
LSU Doctoral Dissertations
The general purpose of this study was to conduct a spatial analysis of the dynamics of rural land values in Louisiana. Specifically, spatial econometric procedures and hedonic price analysis were used to evaluate the impact of land characteristics on land prices across rural land markets in Louisiana. Initially, hedonic models were estimated by ordinary least squares (OLS) procedures to test for the presence of spatial autocorrelation using Lagrange Multiplier tests. Results suggested that there was spatial autocorrelation in the error terms. Hedonic models were then estimated using maximum likelihood (ML) spatial error techniques. Log likelihood numbers and likelihood ratio tests …
A New Broad Spectrum Disinfectant Suitable For The Food Industry, Giovanna Aita Dequeiroz
A New Broad Spectrum Disinfectant Suitable For The Food Industry, Giovanna Aita Dequeiroz
LSU Doctoral Dissertations
A unique biocide composition (patent pending) that is formed from a hydrogen peroxide and sodium hypochlorite mixture was investigated. A biocidal "complex" is formed by adding the peroxide to the hypochlorite in an amount so that the weight ratio of the peroxide to the hypochlorite is no less than 1:10. The chemical structure of this biocidal "complex" is uncertain but we postulate that it is a semi-stable complex, whose stability is disrupted by heat, acid, U/V exposure and the presence of organic matter (i.e., microbes) The antimicrobial activity of the biocidal "complex" is most likely a combination effect between oxidation …
Statistical Models And Genetic Evaluation Of Binomial Traits, Jose Lucio Guerra
Statistical Models And Genetic Evaluation Of Binomial Traits, Jose Lucio Guerra
LSU Doctoral Dissertations
Generalized mixed model methodology and MCMC simulations were used to estimate genetic parameters for calving rate and calf survival with the normal, probit, and logistic models. Calving rate and calf survival were defined as 0 each time a cow failed to calf or a calf failed to survive to weaning age, otherwise they were set to 1. Data were available on 1,458 cows and on 5,015 calves. Cows produced a total of 4,808 records over 4 discrete generations of rotational crosses between Angus, Brahman, Charolais, and Hereford from 1977 to 1995. The heritability of calving rate and calf survival, the …
Seasonal Occurrence Of Phyllophaga Species And Biological Studies Of Phyllophage Ephilida (Say) On Sweet Potato, Ipomoea Batatas (L) Lam, In Louisiana, Aboubacar Diagne
Seasonal Occurrence Of Phyllophaga Species And Biological Studies Of Phyllophage Ephilida (Say) On Sweet Potato, Ipomoea Batatas (L) Lam, In Louisiana, Aboubacar Diagne
LSU Doctoral Dissertations
The biology of Phyllophaga ephilida (Say) was studied in Louisiana with both laboratory and field experiments from 1998 through 2003. The seasonal occurrence of common adult Phyllophaga species in sweet potato growing areas was surveyed with blacklight traps. P. ephilida and P. crinita (Burmeister) were the most common species at all locations. The attractiveness of seven methyl esters of L-isoleucine and L-valine blends to P. ephilida males was evaluated in sweet potato fields in 1999 and 2000. The 100% methyl ester of L-isoleucine was significantly more attractive than all other blend ratios that were tested. The life cycle of P. …
Cercospora Leaf Blight Of Soybean: Pathogen Vegetative Compatibility Groups, Population Structure, And Host Resistance, Guohong Cai
LSU Doctoral Dissertations
Nitrogen nonutilizing mutants were used to assess vegetative compatibility of 58 isolates of Cercospora kikuchii, 55 of which were isolated from soybean plants in Louisiana. Only 16 of 56 self-compatible isolates were assigned to six multi-member vegetative compatibility groups (VCGs), 01-06, with two or three isolates in each VCG. The other 40 isolates were not vegetatively compatible with any isolates other than themselves. All six multi-member VCGs contained isolates from different soybean cultivars, and three included isolates from different locations. Only one VCG included isolates both from soybean leaves and from seeds, while two and three multi-member VCGs included isolates …
Tissue Culture And Transformation Of Introducing Genes Useful For Pest Management In Rice, Shuli Zhang
Tissue Culture And Transformation Of Introducing Genes Useful For Pest Management In Rice, Shuli Zhang
LSU Doctoral Dissertations
Sheath blight (SB), caused by Rhizoctonia solani K¨¹hn, is a major rice disease internationally and in the southern rice area of the Unites States, including Louisiana. Breeders have incorporated partial resistance into commercial rice varieties to control the disease, but a higher level of resistance is needed. It has been demonstrated that the pathogenesis-related (PR) proteins ¦Â-1, 3-glucanase and chitinase are components of effective defense mechanisms for protecting plants against fungal pathogens. This research was conducted to co-transform the ¦Â-1, 3-glucanase, chitinase and bar genes into the rice variety Taipei 309 using the hpt gene for resistance to hygromycin B …