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Articles 1 - 30 of 66
Full-Text Articles in Life Sciences
Louisiana Agriculture Fall, 2004, Lsu Agcenter
Louisiana Agriculture Fall, 2004, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
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.
Louisiana Agriculture Summer, 2004, Lsu Agcenter
Louisiana Agriculture Summer, 2004, Lsu Agcenter
Louisiana Agriculture
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.
Louisiana Agriculture Spring, 2004, Lsu Agcenter
Louisiana Agriculture Spring, 2004, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Louisiana Agriculture Winter, 2004, Lsu Agcenter
Louisiana Agriculture Winter, 2004, Lsu Agcenter
Louisiana Agriculture
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 …
Leptin In Horses: Influences Of Body Condition, Gender, Insulin Insensitivity, Feeding, And Dexamethasone, Joshua Allen Cartmill
Leptin In Horses: Influences Of Body Condition, Gender, Insulin Insensitivity, Feeding, And Dexamethasone, Joshua Allen Cartmill
LSU Doctoral Dissertations
The experiments described herein were designed to answer questions that arose from initially attempting to determine whether treatment with dexamethasone increased concentrations of leptin in geldings. Dexamethasone treatment did in fact increase leptin concentrations in mares, geldings, and stallions. Additional experiments were designed to determine leptin's interaction, not only with the adrenal axis, but with the thyroid axis, the growth hormone/insulin-like growth factor-1 axis, as well as glucose and insulin metabolism in geldings, mares, and stallions. During the course of these experiments, differences in leptin concentrations in the horse were attributed to degree of body condition, gender, and feeding time. …
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 …
Examining The Relationships Between Ability Conceptions, Intrinsic Motivation, Presistence And Performance, Weidong Li
Examining The Relationships Between Ability Conceptions, Intrinsic Motivation, Presistence And Performance, Weidong Li
LSU Doctoral Dissertations
The purpose of this study was to examine the relationships between ability conceptions, intrinsic motivation, persistence, and performance using an interaction approach. The phase-one study revealed that participants who were more oriented toward incremental ability beliefs were likely to be more intrinsically motivated. For those who were more intrinsically motivated, they displayed more persistence and obtained better performance scores. Participants who were highly intrinsically motivated had lower performance scores as they were more oriented toward incremental ability beliefs. The phase-two study showed that participants who were more oriented toward incremental views were more intrinsically motivated, which provided evidence supporting 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 …
An Evaluation Of Cost Of Production Insurance As An Income Support Tool For Rice And Cotton Producers In Louisiana, Erica Harding
An Evaluation Of Cost Of Production Insurance As An Income Support Tool For Rice And Cotton Producers In Louisiana, Erica Harding
LSU Master's Theses
Crop insurance has received a great deal of attention over the past several years. The main interest and focus of analysis on crop insurance has been to evaluate its use and performance as a risk management tool for agricultural producers. Several different types of crop insurance policies are currently available, ranging from minimal yield coverage to revenue coverage. Cost of production crop insurance has been proposed recently as a low cost, safety net type of insurance policy for agricultural producers. This study evaluated the performance of cost of production crop insurance for cotton and rice producers in Louisiana. Crop income …
The Chick Embryo Amnion As An In Vitro Culture System For Ivf And Nt Embryos, Tonya Renea Davidson
The Chick Embryo Amnion As An In Vitro Culture System For Ivf And Nt Embryos, Tonya Renea Davidson
LSU Doctoral Dissertations
Calving rates are significantly reduced following in vitro production of embryos. Thus, if a technique could be developed that would increase calving rates by as little as one viable offspring, significant research advances could be made. Therefore, in a series of experiments, the efficiency and quality of culturing IVP bovine embryos in the amnion of a domestic chicken egg was tested. In Experiment I, by culturing IVP bovine embryos in the chick amnion (day 4 to 7 of incubation) it was discovered that there was no significant difference in blastocyst rates compared with controls. In Experiment II, it was shown …
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 …
The Effect Of Beta-Carotene Vitamin E, And Vitamin C Supplementation Upon Work Capacity During A Protocol Of Arm Curl Exercise Using The Biodex Dyanamometer, Ivan Kenyon Guillory
The Effect Of Beta-Carotene Vitamin E, And Vitamin C Supplementation Upon Work Capacity During A Protocol Of Arm Curl Exercise Using The Biodex Dyanamometer, Ivan Kenyon Guillory
LSU Doctoral Dissertations
The effect of acute and chronic supplementation upon work capacity in trained and untrained subjects was examined using 10 normal healthy subjects (ages 19-23). The subjects were tested using a double-blind crossover design. During the two supplemental stages subjects ingested either the placebo or antioxidant mixture capsules (beta-carotene, vitamin C, vitamin E). There was a 28 day washout period between the two supplemental stages. Subjects were tested during each stage for an acute effect (one day of supplementation) and chronic effect (twenty-eight days of supplementation). Testing consisted of seven sets of arm curl exercises with a 60-second rest period between …
Faunal Succession Of Necrophilous Insects Associated With High-Pofile Wildlife Carcasses In Louisiana, Erin Jean Grindley Watson
Faunal Succession Of Necrophilous Insects Associated With High-Pofile Wildlife Carcasses In Louisiana, Erin Jean Grindley Watson
LSU Doctoral Dissertations
The same entomological criteria used in estimating time of death for humans are applicable for deceased wildlife. Necrophilous insects associated with animal carcasses can provide wildlife law enforcement with valuable information necessary for postmortem interval estimation, and ultimately, to incriminate poachers. The purpose of this research was twofold: to establish species composition, faunal succession patterns, and species and life stage interactions of necrophilous insects associated with three wildlife species; and to identify new methods of evaluating succession patterns using statistical measures. Twenty-one large vertebrate carcasses were monitored throughout decomposition in a mixed flatwood forest in East Baton Rouge Parish, LA …
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 …
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 …
Investigation Of Insect-Weed Interactions In The Rice Agroecosystem, Kelly V. Tindall
Investigation Of Insect-Weed Interactions In The Rice Agroecosystem, Kelly V. Tindall
LSU Doctoral Dissertations
Interactions between graminaceous weed and insect pests of rice and between management practices for these pests were investigated. Studies were conducted to examine preference and performance of rice water weevil, Lissorhoptrus oryzophilus Kuschel, on several weeds commonly found in rice fields. Several weeds were more preferred than rice, and larvae were present on several dicotyledonous weeds, suggesting the host range of L. oryzophilus is broader than previously thought. Effects of the presence of barnyardgrass, (Echinochloa crus-galli Beauv.), on rice stink bugs, Oebalus pugnax F., and L. oryzophilus populations in rice fields were investigated. Presence of barnyardgrass and the synchrony …
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. …
The Effects Of Inorganic And Organic Selenium Sources On Growth Performance, Carcass Traits, Tissue Mineral Concentrations, And Enzyme Activity In Poultry, Robert L, Iii Payne
The Effects Of Inorganic And Organic Selenium Sources On Growth Performance, Carcass Traits, Tissue Mineral Concentrations, And Enzyme Activity In Poultry, Robert L, Iii Payne
LSU Doctoral Dissertations
The purpose of this research was to compare dietary inorganic and organic Se sources in poultry. An experiment was conducted to assess daily egg production and Se deposition in eggs of hens fed diets supplemented with inorganic or organic Se. The results from this experiment indicated that hen production was not affected by Se source, and organic Se increased egg Se concentrations more than inorganic Se. Two experiments then were conducted with broilers to compare dietary organic and inorganic Se on growth performance, carcass traits, breast and plasma Se concentrations, and plasma glutathione peroxidase activity. The results from these experiments …
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 …
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 …
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 …
Effects Of Dietary Protein Level And Fish Meal On Growth And Hormonal Status Of Weaned Dairy Calves, Patricia Terrell Richardel
Effects Of Dietary Protein Level And Fish Meal On Growth And Hormonal Status Of Weaned Dairy Calves, Patricia Terrell Richardel
LSU Master's Theses
Eight weaned Holstein steers approximately 4 mo of age (mean BW = 119.47 ± 2.65 kg) were used in a replicated 4 x 4 Latin square designed experiment to study the effects of protein source and level on performance and anabolic hormonal status of weaned dairy calves. Treatments consisted of two diets containing either 16 or 20 % crude protein (CP) with or without fish meal (FM). Experimental diets were corn silage based with soybean meal (SBM) as the source of ruminal degradable protein and FM as the source of ruminal undegradable protein. The animals were fed their respective diets …
Effect Of Cotton Aphids, Aphis Gossypii (Glover), On Cotton Plant Development And Yield Components, Robert Hankins Jones
Effect Of Cotton Aphids, Aphis Gossypii (Glover), On Cotton Plant Development And Yield Components, Robert Hankins Jones
LSU Master's Theses
The effect of cotton aphids, Aphis gossypii (Glover), on cotton plant development and yield was studied during 2000 and 2001. Tests were conducted at the Macon Ridge Station (Winnsboro, Louisiana) in 2000 and 2001, and at the Northeast Research Station (St. Joseph, Louisiana) in 2001. Tests were performed in irrigated and non-irrigated regimes using individual plant comparisons, micro-plots, and whole plots. In both years and at both locations, cotton aphid densities induced chlorosis, and a downward cupping of leaves during the infestation period. The insecticides, pymetrozine and thiamethoxam, were applied to control natural infestations of cotton aphids. Although pymetrozine and …
Mineral Utilization In Poultry As Affected By Virginiamycin Or Mineral Source, Tanika Ivel O'Connor-Dennie
Mineral Utilization In Poultry As Affected By Virginiamycin Or Mineral Source, Tanika Ivel O'Connor-Dennie
LSU Master's Theses
Four experiments were conducted to evaluate the effects of diets with reduced Ca or nonphytate P (nPP) levels with supplemental virginiamycin (Vm) on growth performance and bone response variables in chicks. All diets were corn-soybean meal based and all treatments were replicated six or eight times with five or six chicks each. Reducing dietary nPP from 0.45 to 0.15, 0.25, or 0.35% decreased most growth and bone response variables. The addition of Vm to diets containing 0.35% nPP and above increased both growth and bone response variables. The addition of Vm to diets containing 0.25% nPP and below had no …
Physicochemical And Functional Properties Of Crawfish Chitosan As Affected By Different Processing Protocols, Sun-Ok Fernandez-Kim
Physicochemical And Functional Properties Of Crawfish Chitosan As Affected By Different Processing Protocols, Sun-Ok Fernandez-Kim
LSU Master's Theses
Chitosan is made from chitin by a chemical process involving demineralization (DM), deproteinization (DP), decolorization (DC), and deacetylation (DA). Very little work has been done to demonstrate the effects of altering or excluding any of the processing steps on chitosan characteristics. The present study was undertaken to evaluate the effects of process modification during chitosan production on the physiochemical and functional properties of crawfish chitosans. Five experimental chitosan samples (DCMPA, DMCPA, DMPCA, DMPAC, DAMPC) prepared with modified processing protocols and the control (DPMCA - traditional chitosan production process) were evaluated and compared with the two commercial crab chitosans. All samples …