Digital Commons Network^™

Toxicity Of Polycyclic Aromatic Hydrocarbons To Benthic Invertebrates., Guilherme R. Lotufo

LSU Historical Dissertations and Theses

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous contaminants in aquatic environments. Because of their hydrophobicity, PAHs accumulate in bed sediments and pose a risk to the benthos. Information on the toxicity of sediment-associated PAHs is, however, limited and more information is needed to improve sediment quality-criteria and ecological-risk assessments. My research focused on improving our current knowledge of the acute and, especially, the sublethal effects of sediment-associated PAHs to aquatic invertebrates. Representatives of two phylogenetically distinct benthic invertebrate groups, freshwater tubificid oligochaetes and estuarine meiobenthic harpacticoid copepods, were used. Organisms were exposed to a range of concentrations of sediment-amended contaminants in …

Immunocytochemical Localization Of Gonadotropins, Growth Hormone, And Prolactin In Equine Pituitary., Mohammad Saeed Rahmanian

LSU Historical Dissertations and Theses

The present research was performed to characterize immunoreactive (ir) pituitary cells in the equine species. Two experiments were performed to measure the prevalence of single- and double-hormone labeled gonadotropes, lactotropes, somatotropes, and mammosomatotropes. In Experiments 1 and 2, pituitaries from three intact pony mares were processed for ultrastructural evaluation of cells stained for luteinizing hormone (LH), follicle-stimulating hormone (FSH), prolactin (PRL), and growth hormone (GH). Primary antibodies and gold-conjugated antibodies were used to double-stain ir-cells. The percentages of pituitary cells stained for each hormone in intact mares were: total gonadotropes, 15 to 32%; LH-only, 2 to 16%; FSH-only, 1 to …

Dairy Herd Improvement Records As Replacement Of Technician Breeding Receipt Database For Routine Estimates Of Non-Return Rates For Al Bulls In Technician-Devoid Areas., Rick A. Baron

LSU Historical Dissertations and Theses

The objective of this study was to find whether DHI data could be used to estimate sire non-return rates to replace current technician data estimates. Bull weighted least squares means for non-return rates were calculated separately for five overlapping 60-90 day service periods from each data source. Models included stud, sire, service number, and linear and quadratic form of breeding month for both data sources, service unit for technician and lactation for DHI data. Sire and lactation were not significant $(P > .10).$ Technician differences $(P < .05)$ were in service unit, stud, service number, and linear and quadratic service month in all but one service period. DHI differed $(P < .05)$ for service number, month (linear and quadratic), and stud in two service periods. Technician R-square values were 0.23 to 0.28 versus 0.94 to 0.96 for DHI. Sire estimated non-return rates were weighted using the inverted estimator standard error squared and compared. Sire, stud, data source, service period, and appropriate interactions were modeled. Weighted bull non-returns differed $(P < .01)$ in magnitude across data sources. Stud, data source by stud, and sire within stud by data source were significant $(P .10).$ Four fertility categories based on mean and standard deviation of the weighted estimates were formed within the data sources across service periods. These categories were correlated (0.5 $>$ r $>$ 0.9) and 52.9 to 87.4% congruent within data source for adjacent …

Use Of Geographic Information System Technology To Assess Vulnerability To Shallow Groundwater Contamination., Brenda G. Bruner

LSU Historical Dissertations and Theses

Geographic Information System (GIS) technology was used to develop a local scale screening procedure for assessing shallow ground water's vulnerability to nitrate contamination. The procedure was based on the spatial distribution of ten key physical and chemical properties of soils. Both flow characteristics and attenuation capabilities of soils were incorporated into the assessment. Land surface areas were classified by the GIS to show the level of vulnerability present at a site as a result of existing natural conditions. The procedure produced a Vulnerability Index (VI), and resulted in VI ranging from 4.98 to 6.72 for the study area (with ten …

Immunodiagnosis Of Fasciolosis By Detection Of Coproantigen., Salma Mohamed Abdel-Rahman

LSU Historical Dissertations and Theses

A monoclonal antibody (MAb)-based western blot analysis (WB) was developed for detection of a 26-28 kD coproantigen in Fasciola hepatica infected cattle. Using WB the coproantigen was detected in feces from experimentally infected calves with 22 flukes or more. Using the biotin-streptavidin modification of WB, antigen was detected in the feces from experimentally-infected calves with 10 flukes or more as early as 6 weeks post-infection. The MAbs did not react with the ES of Paramphistomum sp. or Moniezia sp, but showed slight cross-reactivity with ES from F. gigantica, and there was moderate cross-reactivity with Fascioloides magna ES. Differential staining of …

Poverty And Social Control In Early Modern England: Exeter, 1558-1625., Connie S. Evans

LSU Historical Dissertations and Theses

Poverty has always been, and continues to be, one of the most pressing social problems, and one to which a number of solutions have been proposed through the ages. The present work is an examination of the problem and the responses to it in early modern England, and is set in the local context of the city of Exeter. Prior to the reign of Elizabeth I, the majority of poor law legislation was punitive in nature. rather than rehabilitative. That the nature of poor law legislation changed under Elizabeth was due to a number of factors, not least of which …

Geographic Information Systems For Schistosomiasis In Brazil., Maria Emilia Bavia

LSU Historical Dissertations and Theses

This study has identified environmental factors influencing the distribution of schistosomiasis and the prevalence of the disease in the population in the state of Bahia, Brazil. The Intergraph Modular Environmental Systems nucleus (MGE), a geographic information system (GIS), was applied to 30 municipalities in Bahia to establish a descriptive and quantitative study of the spatial and temporal dynamics of infection. The GIS was constructed by digitizing maps of soil type, vegetation, topology, and hydrologic features including temperature, rainfall, and seasonal pattern of precipitation, prevalence of schistosomiasis, and the distribution of snails, which are the intermediate hosts of the disease. The …

The Relationship Of Hemolymph Sugar, Juvenile Hormone And Biogenic Amines To The Three Behavioral States Of Mature Honey Bees., Janko Bozic

LSU Historical Dissertations and Theses

Differences in sugar titers, JH synthesis rate and biogenic amine metabolism correlated with three distinct activity groups or mature bees: resting bees, followers and dancers. Dancers had lower trehalose titers than followers or resting bees. In absconding bees trehalose titers were even lower, due to greatly elevated locomotor activity. The collecting and transferring of food by dancers and followers resulted in a higher glucose titer than in resting bees. Followers had a higher-JH synthesis rate than dancers, suggesting that JH could be an internal motivational stimulus to recruit followers to forage. Dancers and followers collect and transfer food and therefore …

The Biology And Ecology Of The Yellowmargined Leaf Beetle, Microtheca Ochroloma Stal, (Coleoptera: Chrysomelidae) On Crucifers., Abdullahi Olod Ameen

LSU Historical Dissertations and Theses

The biology and ecology of the yellowmargined leaf beetle, Microtheca ochroloma Stal, were studied on cabbage, Brassica oleracea var capitata L., collard, B. oleracea var acephala L., mustard, B. juncea Cosson, turnip, B. rapa L., and radish, Raphanus sativus L. The life cycle of the beetle consists of an egg stage, four larval instars, prepupal, pupal and adult stages. There were no significant differences in the effect of host plant on duration of development of immature beetles (p = 0.3353). The mean duration of development from oviposition to adult emergence ranged from 26.6 d on turnip to 27.5 d on …

Measuring The Effect Of Louisiana Agriculture On The State Economy Through Multiplier And Impact Analysis (Bulletin #849), David W. Hughes

LSU AgCenter Bulletins

Multipliers derived from any input-output model are upper bound estimates of the potential economic activity generated by a particular sector of an economy. The model presented in this publication can serve as a device for evaluating the effects of a particular policy, such as a particular change in agricultural environmental regulations, on general economic activity in Louisiana.

The Archaeological Site Of Port Dauphin (1mb61): Its Role In The French Colony On Mobile Bay, George W. Shorter

LSU Historical Dissertations and Theses

The French colony in Louisiana resulted from the competition between France, Spain, and England for control of the region. France's interest, that began with the expedition of La Salle in 1682, resulted in the founding of the first French permanent colony on the Gulf coast by Iberville in 1699, Fort Maurepas. The colony was moved in 1702 to Mobile Bay. Mobile, the capital, was located 39 miles upriver for access to the Indian nations of the interior. Dauphin Island served as port. After two decades the colony was refocused on the Mississippi River, but the first 20 years of French …

The Educational Value Of 4-H Activities As Perceived By Louisiana 4-H Agents, Lanette Griffin

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine the educational value of 4-H activities as perceived by Louisiana 4-H agents. Data were obtained by a researcher designed survey completed by 91 4-H agents during the 1994 Louisiana Cooperative Extension Service’s annual conference. The data showed the 4-H camp was the highest rated educational activity and it was the only activity perceived as having a very high educational value. Twenty activities were rated as high in educational value, 25 as moderate in educational value, and four items as low in educational value. Agents were also asked to estimate the number …

Louisiana Agriculture Magazine, Summer 1995, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Local Initiation Of Spermatogenesis In The Horse, A. J. Clemmons, D. L. Thompson, L. Johnson

Faculty Publications

Gross observation of testicular parenchyma of 1.5 to 2-yr-old horses reveals both light and dark regions. If this gross, differential shading reflects quantitative differences in the development of spermatogenesis and interstitial cell populations, the horse may prove to be a useful model for study of the paracrine relationships associated with initiation of spermatogenesis. The objective of this study was to characterize seminiferous tubules and interstitium of testes with gross, differential shading. Testes with both light and dark regions of parenchyma were obtained from horses 1.5- 2 yr old and compared to parenchyma of fetal, 2-yr old, or 5-yr-old horses. Stereology …

The Effect Of Acute Cold Exposure On Body Weight In Broiler Chicks, Stephen T. Pittman

Honors Capstones

No abstract provided.

Bead Colors As Social Relations Markers At Mission Soledad, California, Lori Lee Buck

LSU Historical Dissertations and Theses

This thesis is an interpretive analysis focusing on the use of beads as a tool for determining social relations at Mission Soledad, California. The main indicator of social relations used in this thesis is bead distribution. Two attributes were used to classify the beads, color and type.

To understand the importance of the bead distribution, the ideologies of the three native cultures that were recruited to the mission and the Spanish missionaries who founded the mission were studied. From this information, color symbolism and sources were examined to gain knowledge of important colors. This was done with the hopes that …

Louisiana Agriculture Magazine, Spring 1995, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Legitimite Dans L'Oeuvre Biographique Et Autobiographique De Marguerite Yourcenar., Muriel Helene Placet

LSU Historical Dissertations and Theses

This dissertation proposes a close reading of the biographical and autobiographical works of Marguerite Yourcenar: Le Labyrinthe du Monde and Memoires d'Hadrien. The purpose of this reading is to explore the process through which Yourcenar attempts to establish the legitimacy of the individual (be it her own self or one of her characters). Since Yourcenar rejects the "cult of the self", the elaboration of her identity is never explicitly at work in the text. In Le Labyrinthe du Monde, the author-narrator explores her "unicity" by reconstructing her genealogy with the result that she never becomes the narrated "object" of the …

Extension Agricultural Agents' Perceptions Of Sustainable Agriculture In The Southern Region Of The United States., Jerry Gene Sisk

LSU Historical Dissertations and Theses

The purpose of this study was to describe extension agricultural agents' perceptions of sustainable agriculture in the Southern Region of the United States. The population included Cooperative Extension county/parish agents with major responsibility in agriculture working in the 13 states of the Southern Region of the United States. These individuals were either employed by the thirteen institutions established by the Morrill Act of 1862 (the 1862 Cooperative Extension Services) or by eleven institutions established by the Second Morrill Act of 1890 (the 1890 Cooperative Extension Services). The study investigated agents' perceptions of sustainable agriculture concepts, and agents' perceptions of factors …

Aerobic And Anaerobic Starvation Metabolism In Methanotrophic Bacteria, P. Roslev, G. M. King

Faculty Publications

The capacity for anaerobic metabolism of endogenous and selected exogenous substrates in carbon- and energy-starved methanotrophic bacteria was examined. The methanotrophic isolate strain WP 12 survived extended starvation under anoxic conditions while metabolizing 10-fold less endogenous substrate than did parallel cultures starved under oxic conditions. During aerobic starvation, the cell biomass decreased by 25% and protein and lipids were the preferred endogenous substrates. Aerobic protein degradation (24% of total protein) took place almost exclusively during the initial 24 h of starvation. Metabolized carbon was recovered mainly as CO2 during aerobic starvation. In contrast, cell biomass decreased by only 2.4% during …

Measuring The Effect Of Louisiana Agriculture On The State Economy Through Multiplier And Impact Analysis, David W. Hughes

LSU Agricultural Experiment Station Reports

No abstract provided.

Evaluation Of Tsetse Attractants As Baits For Horse Flies And Deer Flies (Diptera: Tabanidae) In Louisiana, L. D. Foil, L. J. Hribar

Faculty Publications

No abstract provided.

Effects Of Inoculation And Wilting On The Preservation And Utilization Of Wheat Forage, C. C. Williams, M. A. Froetschel, L. O. Ely, H. E. Amos

Faculty Publications

Wheat forage was harvested at an early head stage of maturity and ensiled in 12 900-kg experimental silos at three percentages of DM (20.8% for direct-cut forage and 27.9 or 39.3% for wilted forage) either with or without application of a lactic acid bacterial inoculant. The objective was to test the efficacy of the inoculant to alter silage fermentation, preservation, and nutritive value of wheat forage ensiled at different moisture percentages because of wilting. Wilting enhanced DM preservation and decreased fermentation end products. Inoculation made the fermentation more homolactic but did not enhance DM preservation. Silage rations (80% DM as …

Effects Of Inoculation And Wilting On The Preservation And Utilization Of Wheat Forage, C. C. Williams, M. A. Froetschel, L. O. Ely, H. E. Amos

Faculty Publications

Wheat forage was harvested at an early head stage of maturity and ensiled in 12 900-kg experimental silos at three percentages of DM (20.8% for direct-cut forage and 27.9 or 39.3% for wilted forage) either with or without application of a lactic acid bacterial inoculant. The objective was to test the efficacy of the inoculant to alter silage fermentation, preservation, and nutritive value of wheat forage ensiled at different moisture percentages because of wilting. Wilting enhanced DM preservation and decreased fermentation end products. Inoculation made the fermentation more homolactic but did not enhance DM preservation. Silage rations (80% DM as …

Louisiana Agriculture Magazine, Winter 1995, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Ammoniation Of Cellulosic Materials For Use In Fertilization And Oil Spill Remediation., Ananda Padmasiri De Silva

LSU Historical Dissertations and Theses

The stringent environmental regulations, rising cost, public concerns, and the limited availability of landfills for disposal of organic wastes have stimulated efforts to identify cost-effective, environmentally sound, alternative waste disposal technologies. The value of organic wastes as soil amendments is limited by their low nutrient value, occasional strong odors and high costs of transportation. The primary goal of this investigation was to develop a process to enrich the N content and to reduce the water content of organic wastes in order to enhance the value of these wastes for use in fertilization and oil spill remediation. A chemical process was …

Lsu General Catalog 1995-1996, Louisiana State University And Agricultural And Mechanical College

LSU General Catalog

The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The General Catalog includes information on registration and financial aid as well as academic services offered to all students.

Submergence Impacts On Selected Wetland/Bottomland Tree Species., Jian Sun

LSU Historical Dissertations and Theses

Flooding is a common natural stress occurring in wetland/bottomland forests. Submergence, total immersion, is a special case of flooding, which has received limited attention in the literature. This study provides information on the impacts of three submergence treatments on three bottomland tree species. The results indicated that submergence would inhibit shoot and root growth for the three tested species during the submergence period. However, the survival of these species under submergence conditions were different. Taxodium distichum (L.) Rich survived even after 30 days of water coverage and survival continued to be high during the recovery period. Quercus nuttallii Palmer was …

Comment Redessiner Le Monde: Art Et Anthropologie Dans L'Oeuvre D'Antonin Artaud., Irene Poutier

LSU Historical Dissertations and Theses

In my dissertation entitled Comment redessiner le monde: Art et anthropologie dans l'oeuvre d'Antonin Artaud, I examine Artaud' s critical writings on painting, music and theatre which are central to his reflection. My research focuses on key concepts in Artaud's writings such as "culture," "primitivite" and "mythe." Notwithstanding the complexity and controversial aspects of these notions in the post-modern era, Artaud uses them as pivot points in the articulation of a totally new philosophy of life, which places art at the heart of social activity. My first point underlines Artaud's belief that western civilization alienates the artist from the pervading …

Selenium Speciation In Natural Waters: Separation Technique, Kinetic And Case Studies., William Charles Glover

LSU Historical Dissertations and Theses

Several methods of separating the dissolved 4+ and 6+ oxidation states of selenium were investigated. The use of Dowex 1 anion exchange resin in packed columns was not satisfactory as quantitative separation was not obtained. The determination of selenite after formation of a fluorescent complex with 2,4-diaminonaphthalene was quantitative but the procedure was too involved for routine work. Separation was achieved by co-precipitating the selenite from solution with ferric hydroxide precipitate formed between pH 5 and 6. The co-precipitation technique is effective from 4 to 50 degrees centigrade and is unaffected by salinity although phosphates interfere at high concentrations. The …