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A Comparison Of The Effects Of Multiple Visual Examples And Nonexamples Versus Prototypical Examples On Science Concept Learning: An Exploratory Study Based Upon The Concept Of Photosynthesis., Eleanor Deane Abrams Jan 1994

A Comparison Of The Effects Of Multiple Visual Examples And Nonexamples Versus Prototypical Examples On Science Concept Learning: An Exploratory Study Based Upon The Concept Of Photosynthesis., Eleanor Deane Abrams

LSU Historical Dissertations and Theses

Two researcher-produced, standard-length videos on photosynthesis (and accompanying ancillary materials) were developed with the input of educators and content experts. The control treatment video script contained the standard number of prototypical examples and graphics based high school textbooks. The experimental treatment video script was based on the theory of conceptual change. Two student focus groups met daily for one week and reviewed portions of the original experimental treatment script for clarity, brevity, and choice and placement of examples and nonexamples. Their suggestions and conceptual change have implications for curriculum design. The main research question of this study was: Do students …

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Effects Of Heat, Lactic Acid, And Modified Atmosphere Packaging On Listeria Monocytogenes On Cooked Crawfish Tail Meat., Warren Joseph Dorsa Jan 1994

Effects Of Heat, Lactic Acid, And Modified Atmosphere Packaging On Listeria Monocytogenes On Cooked Crawfish Tail Meat., Warren Joseph Dorsa

LSU Historical Dissertations and Theses

The generation time of L. monocytogenes was calculated to be 72.2, 28.5, 17.01, and 6.9 h on crawfish tail meat held at 0, 4, 6, and 12$\sp\circ$C, respectively. Potassium sorbate (PS) (0.3%) spray treatments on crawfish held at 4$\sp\circ$C, extended the lag phase of the bacterium. However, once exponential growth began, a generation time not significantly different (P $>$ 0.05) than that of untreated crawfish was observed. Samples sprayed with 0.3% citric acid (CA) and held at 4$\sp\circ$C supported growth of the bacterium equally well as that of untreated samples. Thermal inactivation of L. monocytogenes using a three neck …

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Convention Unity Speeches., Lynna L. Cherry Jan 1994

Convention Unity Speeches., Lynna L. Cherry

LSU Historical Dissertations and Theses

National nominating conventions serve a number of purposes for their respective parties. Most notably, the convention officially bestows the party nomination on the candidate for president. Recent political conventions have been carefully orchestrated to create an air of party unity and solidarity behind the respective candidate. Beginning with the 1980 Democratic National Convention, there has been a new occurrence at these conventions. Contenders who were not going to receive the party nomination nor were they going to be the running mate for the party nominee have been granted podium time (usually during prime time of the convention) ostensibly for the …

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Fluorescence Studies Of Tomaymycin-Dna Adducts: Structure And Dynamics., Qi Chen Jan 1994

Fluorescence Studies Of Tomaymycin-Dna Adducts: Structure And Dynamics., Qi Chen

LSU Historical Dissertations and Theses

The relationship between ground-state structure and fluorescence lifetime of tomaymycin was studied using steady-state and time-resolved fluorescence, absorption, NMR, and photochemical techniques. Excited-state proton transfer and intersystem crossing were identified as the major nonradiative processes. Solvent isotope effect was found in aqueous solution, which did not involved C8OH. Photochemical H-D exchange on aromatic C6H and C9H were observed with similar rate. At 77 K, the total luminescence quantum yield was determined as 0.99. The quantum yield ratio of phosphorescence to fluorescence was 1.2. The limiting anisotropy was ${\sim}0.34$ for fluorescence and $-$0.1 for phosphorescence. The number and type of tomaymycin-DNA …

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Factors Influencing Conceptual Change In Evolution: A Longitudinal, Multicase Study., Sherry Southerland Demastes Jan 1994

Factors Influencing Conceptual Change In Evolution: A Longitudinal, Multicase Study., Sherry Southerland Demastes

LSU Historical Dissertations and Theses

A high school Biology II classroom was observed daily in order to study students' conceptual change in evolution of life. The conceptual frameworks of four student participants were documented and the patterns of conceptual change were studied closely throughout the full school year. Data collected included open-ended and structured individual interviews, student journals, daily classroom observations, field notes, and pre-and posttests. All 68 student interviews (17 per student) were recorded, transcribed, coded, and sorted to find patterns of conceptual change. Additional interviews were conducted with the teacher, parents, principal, and high school counselor. The researchers' interpretations were shared with the …

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The Legacy Of America's "Forgotten Warriors:" An Analysis Of Dysfunctional Relational Communication Among Vietnam Combat Veterans Exhibiting Posttraumatic Stress Disorder Symptomatology., Jack Eugene Rogers Jan 1994

The Legacy Of America's "Forgotten Warriors:" An Analysis Of Dysfunctional Relational Communication Among Vietnam Combat Veterans Exhibiting Posttraumatic Stress Disorder Symptomatology., Jack Eugene Rogers

LSU Historical Dissertations and Theses

The literature has long reported the atypical stress-producing characteristics of the Vietnam conflict. For veterans still suffering from the psychological and emotional "fall-out" of war-related anxiety, one long-term adjustment dysfunction is the difficulty PTSD-positive veterans experience in sustaining successful interpersonal relationships. Competent dyadic communication plays a critical role in engendering positive relational trajectories. This study investigated the hypothesis that posttraumatic stress disorder would exhibit a correlational relationship with the relational communication topoi of intimacy and dominance/control. A cross-regional sample of 218 PTSD-positive veterans and their relational partners provided data. Scale construction and validation was achieved through orthogonal factor analysis with …

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Nutrient Restriction In Mares: Plasma Metabolite And Hormonal Characterization And Responses To Feeding And Metabolic Challenges., Leeann Salathe Sticker Jan 1994

Nutrient Restriction In Mares: Plasma Metabolite And Hormonal Characterization And Responses To Feeding And Metabolic Challenges., Leeann Salathe Sticker

LSU Historical Dissertations and Theses

Three experiments were designed to provide a comprehensive reference for the responses of plasma metabolites and hormones to control and restricted intakes of protein and(or) energy and to feed deprivation. The objectives of the first and second experiments were to characterize the effects of protein and(or) energy restriction on glucose, insulin, nonesterified fatty acids (NEFA), urea nitrogen (N), insulin like growth factor-1 (IGF-1), cortisol, triiodothyronine ($T\sb3$, thyroxine ($T\sb4$), prolactin, and growth hormone (GH) concentrations in plasma on a daily basis, after feeding, and after i.v. administration of glucose or epinephrine. The third experiment was conducted to answer questions of how …

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A Comparative Study Of The Oral Language Of Students In Basal-Based And Whole Language Kindergartens., Joan H. Lucille Benedict Jan 1994

A Comparative Study Of The Oral Language Of Students In Basal-Based And Whole Language Kindergartens., Joan H. Lucille Benedict

LSU Historical Dissertations and Theses

Concern has existed for several years over the classroom practices relating to the "whole language" approach as opposed to the "basal-based" approach relative to literacy development, especially with respect to the appropriateness of each method for use with minority and lower socioeconomic groups of children entering kindergarten. This study describes the oral language of both African American and European American kindergarten children from low and middle socioeconomic status families who are attending public school kindergartens, one using whole language and one a basal-based approach. The language during centertime of seventeen children from these two classrooms was audiotaped using wireless microphones …

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Demographic And Genetic Studies Of Seed Dispersal And Juvenile Survival In An Old-Growth Longleaf Pine Population., Susan Langevin Grace Jan 1994

Demographic And Genetic Studies Of Seed Dispersal And Juvenile Survival In An Old-Growth Longleaf Pine Population., Susan Langevin Grace

LSU Historical Dissertations and Theses

Many biotic and abiotic factors contribute to the formation of aggregations of seedlings and juveniles in populations of forest trees. The following studies investigate factors influencing the spatial structure of juveniles in an old-growth longleaf pine (Pinus palustris Mill.) population. In the first study, effects of adult tree density, pine needle litter and fire temperature were related to the demography of juveniles. A cohort of juveniles from a mast year in 1987 was followed over four years. Demographic components were determined both before and up to two years after fire. Juveniles were more dense, larger and had higher survival in …

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Colonial Natal, 1838 To 1880: The Making Of A South African Settlementsystem. (Volumes I And Ii)., Darrell Peter Kruger Jan 1994

Colonial Natal, 1838 To 1880: The Making Of A South African Settlementsystem. (Volumes I And Ii)., Darrell Peter Kruger

LSU Historical Dissertations and Theses

The study of colonial settlement policy is one way for human geographers to understand how people shape the places they inhabit. The major concern of this study was to determine the impact of Dutch-Afrikaner, Native, and British cultures on the Natal colonial settlement system between 1838 and 1879. A prolonged era (1844-1879) of British settlement policy was preceded by a brief period of Dutch-Afrikaner hegemony (1838-1843). I test the hypothesis that Natal's British settlement system was a syncretic compromise between European and South African (Native and Dutch-Afrikaner) adaptations. My interpretation turns on frontier processes of transfer and borrowing. I suggest …

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Seasonal And Spatial Abundance And Size Distribution Of Fishes Associated With A Petroleum Platform In The Northern Gulf Of Mexico., David Robert Stanley Jan 1994

Seasonal And Spatial Abundance And Size Distribution Of Fishes Associated With A Petroleum Platform In The Northern Gulf Of Mexico., David Robert Stanley

LSU Historical Dissertations and Theses

The purpose of this study was to demonstrate the utility of dual-beam hydroacoustics in measuring abundance and target strength of fishes near a petroleum platform in the northern Gulf of Mexico. From September to November 1990 fish densities ranged from 0 to 1.88 fish/m$\sp3$ and varied with platform side, depth, time of day and month. Densities were highest adjacent to the platform and decreased significantly beyond 9 m. Approximately 2,400 to 8,300 fish were associated with the platform depending on month. Target strengths ranged from $-$56 to $-$24 dB and varied with side of the platform and month. Mean monthly …

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Kinetics Of The Immune Response To Mycobacterium Paratuberculosis Of Resistant And Susceptible Mice., Ronald Sidney Veazey Jr Jan 1994

Kinetics Of The Immune Response To Mycobacterium Paratuberculosis Of Resistant And Susceptible Mice., Ronald Sidney Veazey Jr

LSU Historical Dissertations and Theses

The resistance and immunologic responses of a Bcg susceptible (C57BL/6) and Bcg resistant (C3H/He) strain of mouse were compared after infection with Mycobacterium paratuberculosis. Bacterial resistance was evaluated by bacterial counts and histopathology of chronically infected mice. Levels of non-specific macrophage activation and the response of various T cell subsets were also evaluated following infection. Susceptible mice orally infected with Mycobacterium paratuberculosis developed granulomatous lesions containing acid-fast bacteria in the mesenteric lymph nodes. Significant differences in CFU of M. paratuberculosis were observed between C57BL/6 and C3H/He mice following an i.p. infection. Susceptible mice failed to limit bacterial proliferation, while bacterial …

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Effect Of Processing On Protein And Carotenoids In Weaning Food Formulated From Sweetpotatoes, Or Apios Americana., Michael Andrew Ameny Jan 1994

Effect Of Processing On Protein And Carotenoids In Weaning Food Formulated From Sweetpotatoes, Or Apios Americana., Michael Andrew Ameny

LSU Historical Dissertations and Theses

White flesh sweetpotatoes (Ipomoea batatas (L.) Lam) are a major food crop in developing countries. This study was to evaluate the protein and carotenoid content and quality of various white fleshed African sweetpotatoes and Apios americana tubers for use as a weaning food. The sweetpotato and Apios are not normally considered sources of carotenoids and proteins, but the wide use of sweetpotatoes as a source of carbohydrate and the renewed interest in Apios warrant the study of carotenoids and proteins in these crops. Total carotenoids ranged from 0$\mu{\rm g}$/100g to 260$\mu$g/100g (fresh weight basis) for sweetpotatoes. Apios total carotenoids ranged …

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Effect Of Temperature, Cell Concentration, And Split Dose Gamma Radiation On The Radiosensitivity Of Listeria Monocytogenes., Linda S. Andrews Jan 1994

Effect Of Temperature, Cell Concentration, And Split Dose Gamma Radiation On The Radiosensitivity Of Listeria Monocytogenes., Linda S. Andrews

LSU Historical Dissertations and Theses

Among food-borne pathogens, Listeria monocytogenes is one of the more resistant to food processing methods, including irradiation. USFDA approval for irradiation of processed meat and seafood products likely to contain Listeria spp. is $<$3 kGy gamma radiation. The incidence of L. monocytogenes in food products varies between 5-30% and at levels $<10\sp4$ CFU/g. With the capacity of this bacterium to multiply at refrigeration temperatures and the zero tolerance level mandated by the USFDA it becomes imperative to maximize the efficiency of the irradiation process. The first purpose of this study was to determine if initial cell concentration and/or temperature at time of irradiation influences the radiosensitivity of L. monocytogenes. Secondly, to determine whether split dose application would effect the radiation response of this bacterium. Concentrations of 10$\sp3,$ 10$\sp6$ and 10$\sp9$ cfu/ml of L. monocytogenes Scott A, were suspended in tryptic soy broth and exposed to 0-5 kGy gamma (1.25MeV) radiation at 20, 4, and -80$\sp\circ{\rm C}.$ Split doses were applied in equal portions to initial cell concentrations of 10$\sp6$ and 10$\sp9$ at the same temperatures. Surviving cells under the various conditions were enumerated and irradiation D-values were calculated from linear regression curves. At all temperatures, cell concentrations of 10$\sp3{\rm CFU/ml}$ were reduced to non recoverable levels with 2 kGy gamma radiation. The irradiation D-value of 0.43 kGy for frozen (-80$\sp\circ{\rm C})$ cultures of 10$\sp6$ CFU/ml was significantly lower (p $<$ 0.05) than the D-values (0.58 and 0.62 kGy) for the same cell concentration at the other two temperatures (20$\sp\circ$ and 4$\sp\circ{\rm C},$ respectively). For higher cell concentration of 10$\sp9$ cfu/ml, a D-value of 0.42 kGy was obtained for both 4$\sp\circ{\rm C}$ and -80$\sp\circ{\rm C}$ these were significantly lower (p $<$ 0.05) than 0.50 kGy for 20$\sp\circ{\rm C}$ suspensions. With both cell concentrations, the lowest D-values were obtained when cells were irradiated in the frozen state indicating a that primary cell damage was due to direct effects of irradiation. Split doses of 1 and 2 hours time between fractions approached the generation times for this bacterium and were significantly reduced at 20$\sp\circ{\rm C}.$ However, there was no consistent trend in reductions at 4$\sp\circ$ or -80$\sp\circ{\rm C}.$ Split dose application of irradiation to food pathogens should be further explored.

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The Development And Evaluation Of Impedance Technology To Determine The Quality Of Shrimp And Catfish., Patti Lynn Wiese Lehigh Jan 1994

The Development And Evaluation Of Impedance Technology To Determine The Quality Of Shrimp And Catfish., Patti Lynn Wiese Lehigh

LSU Historical Dissertations and Theses

Impedance technology is currently used as a measurement of microbial activity. The purpose of the current study was to determine the feasibility of utilizing impedance technology to evaluate the quality of white shrimp (marine species) and channel catfish (freshwater species). Impedance analysis measurements (I-values) of raw shrimp increased for samples stored at 5, 25, and 35$\sp\circ$C; however, control samples stored at $-$20$\sp\circ$C displayed no significant changes in I-values. I-values from thermally processed shrimp had no direct relationship with odor scores, increased storage time, or increased storage temperature. It was concluded that while impedance measurements were able to indicate the degree …

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The Production And Characterization Of Alginate Produced By Pseudomonas Syringae., Richard David Ashby Jan 1994

The Production And Characterization Of Alginate Produced By Pseudomonas Syringae., Richard David Ashby

LSU Historical Dissertations and Theses

Alginate has many industrial uses because of its unique colloidal behavior, and its ability to thicken, stabilize, emulsify, suspend, form films, and produce gels. Currently, all commercial alginate comes from brown algae, where it exists naturally as a structural material. Many different types of brown algae produce alginate but it can only be obtained in sufficient quantity and quality from a limited number of species. On the basis of location, at least half of the world's resources of this polymer are potentially at risk due either to political instability or industrial pollution. Bacteria provide a potentially unlimited alternate source for …

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Sedimentation Processes In Selected Coastal Wetlands From The Gulf Of Mexico And Northern Europe., John Charles Callaway Jan 1994

Sedimentation Processes In Selected Coastal Wetlands From The Gulf Of Mexico And Northern Europe., John Charles Callaway

LSU Historical Dissertations and Theses

Sediment cores were collected from coastal wetlands from the Gulf coast of North America and northern Europe to study accretion rates and heavy metal accumulation. There was a significant decrease in vertical accretion rates from low to high marsh for Gulf coast samples. Contrary to previous results, these low tidal range sites did not have negative accretion balances. Northern European samples demonstrated the utility of Chernobyl $\sp{137}$Cs as a sediment marker. There were large differences in sediment characteristics and accretion rates between Polish and western European samples. Vertical accretion rates based on $\sp{210}$Pb were lower than $\sp{137}$Cs rates for most …

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Immunological And Developmental Factors Affecting The Efficacy Of In Vitro Fertilization, Embryo Culture And Embryo Transfer In The Domestic Cat., William Frederick Swanson Jan 1994

Immunological And Developmental Factors Affecting The Efficacy Of In Vitro Fertilization, Embryo Culture And Embryo Transfer In The Domestic Cat., William Frederick Swanson

LSU Historical Dissertations and Theses

Developmental and immunological factors affecting the efficacy of assisted reproduction for domestic and endangered nondomestic felid species were investigated. In the first study, domestic cats exhibited decreased (P $<$ 0.05) numbers of follicles and maturity of oocytes following repeated treatments, at short intervals (44-50 days), with a combination regimen of equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG). Queens had elevated titers of eCG/hCG-binding immunoglobulins compared with male cats and naive queens, and these immunoglobulins attenuated eCG and hCG bioactivity in mouse ovarian stimulation assays. However, refractory queens appeared to cycle naturally and were responsive to an alternative exogenous gonadotropin, porcine follicle stimulating hormone (pFSH). In the second study, queens exhibited individual variability in immune responses to eCG and hCG, and this variability affected (P $$ 0.05) when longer intervals (130-135 days) were used between successive eCG/hCG treatments. In the third study, the effects of eCG and hCG on the suitability of the maternal environment were investigated. Following intramuscular injection, eCG had an elimination half-life of 24 to 48 hours and, 5 and 15 days after follicular aspiration, eCG/hCG-treated queens had formed multiple ancillary follicles and secondary corpora lutea (CL), respectively. Treatment with antisera against eCG/hCG slowed (P $$ 0.05) serum progesterone levels or decrease (P $>$ 0.05) the number of secondary ovarian structures. In the fourth study, developmental requirements of IVF-derived cat embryos were examined, with the emphasis on energy sources, media complexity and tissue co-culture and temporal variations in these factors. Embryos developed equally well (P $>$ 0.05) to morulae in simple media containing either glucose or glutamine, but blastocyst formation and embryo cell number were decreased (P $<$ 0.05) when glucose was present during the early culture period. Co-culture of embryos on oviductal cell monolayers decreased (P $<$ 0.05) fertilization and blastocyst formation. In the final study, a transcervical technique for embryo transfer was developed and used successfully to produce viable offspring in the domestic cat.

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Epidemiology Of Strongylate Nematode And Coccidia (Eimeria) Infection In Sheep With Special Reference To Breed Resistance., Mahesan Bahirathan Jan 1994

Epidemiology Of Strongylate Nematode And Coccidia (Eimeria) Infection In Sheep With Special Reference To Breed Resistance., Mahesan Bahirathan

LSU Historical Dissertations and Theses

In the United States, the annual production losses in small ruminants due to internal parasites has been estimated at $45 million. In 1992, 1993 and 1994, breed specific responses to naturally acquired strongylate nematode and coccidia ({\it Eimeria\/}) infections were compared in three classes (suckling lambs, weaned lambs, and mature ewes) of pure-bred Suffolk and sheep native to Louisiana (Native) which were grazed together on infective pasture. Parasitological (fecal egg counts and nematode counts) and hematological (packed cell volumes, total immunoglobulin levels, total and class-specific anti-{\it Haemonchus contortus\/} antibody levels and eosinophil counts) data were collected. In suckling Native lambs, …

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Effects Of Nandrolone Decanoate On Strength, Markers Of Bone Formation And Turnover In Obese Postmenopausal Women With Normal Bone Density., Ellen Rose Brooks Jan 1994

Effects Of Nandrolone Decanoate On Strength, Markers Of Bone Formation And Turnover In Obese Postmenopausal Women With Normal Bone Density., Ellen Rose Brooks

LSU Historical Dissertations and Theses

Treatment with androgens and anabolic steroids in conditions of high bone turnover seen in osteoporotic postmenopausal females has resulted in bone density improvement. Research has demonstrated a link between muscle mass and bone due to the mechanical demands placed on bone by muscular contractile force associated with physical activity. This study examined whether treatment with a synthetic anabolic steroid, 30 mg. of nandrolone decanoate every two weeks, or placebo increased lean mass, cross-sectional area of thigh muscle and muscle torque production while preserving bone mineral density (BMD) in 18 dieting, sedentary, obese, postmenopausal females not on estrogen replacement therapy. Obesity …

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Akira Miyoshi's Didactic Works For Solo Piano., Naomi Noro Brown Jan 1994

Akira Miyoshi's Didactic Works For Solo Piano., Naomi Noro Brown

LSU Historical Dissertations and Theses

Akira Miyoshi (b. 1933) is a well-known composer and respected educator in Japan. His compositional output includes music for piano as well as numerous instrumental and vocal compositions. He has been commissioned to write music for important international events including the Tokyo Olympics, World's Fair, and International Music Competition. He performs and conducts his own music in one-composer recitals in addition to giving lectures, master classes, and serving as a judge in competitions. Miyoshi has taught piano and composition for many years at two prestigious music schools in Japan--Tohogakuen University and Tokyo National University of Fine Arts and Music. Through …

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Patterns Of Adaptive Functioning In Cortical And Subcortical Diagnostic Groups Of Dementia., Paul Matthew Dammers Jan 1994

Patterns Of Adaptive Functioning In Cortical And Subcortical Diagnostic Groups Of Dementia., Paul Matthew Dammers

LSU Historical Dissertations and Theses

Much debate exists as to the independence of subcortical dementia as a recognizable clinical entity. Researchers in the dementia area seem to accept that cortical dementias are relatively more incapacitating than subcortical dementias. However, there are no empirical studies to support this claim. Impairment in adaptive functioning is one criterion to be met in the diagnosis of dementia according to DSM-III-R (APA, 1987) and NINCDS-ADRDA criteria (McKhann, Drachman, Folstein et al., 1984). However, a comparison of the degree of impairment in adaptive functioning between subcortical and cortical diagnostic groups of dementia has never been systematically and empirically investigated. This study …

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Arabidopsis Glabrous1 Gene Requires Downstream Sequences For Function, J. C. Larkin, D. G. Oppenheimer, S. Pollock, M. D. Marks Dec 1993

Arabidopsis Glabrous1 Gene Requires Downstream Sequences For Function, J. C. Larkin, D. G. Oppenheimer, S. Pollock, M. D. Marks

Faculty Publications

No abstract provided.

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Louisiana Agriculture Magazine, Fall 1993, Lsu Agricultural Experiment Station Oct 1993

Louisiana Agriculture Magazine, Fall 1993, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Collaborative Writing In Petroleum Engineering: A Case Study Of Petroleum Engineers In An Academic Setting, Michael Anne Coffey Aug 1993

Collaborative Writing In Petroleum Engineering: A Case Study Of Petroleum Engineers In An Academic Setting, Michael Anne Coffey

LSU Historical Dissertations and Theses

Interest in collaborative writing has surged in composition studies since the mid-tolate 1980s; aspects addressed include motivation, the composing process, the kinds of participants, authorship, conflict, etc. Much composition research concentrates on collaboration in the workplace to gain an understanding of collaborative writing that can be readily transferred to the classroom and that can prepare students for the social, as opposed to solitary, act of writing—to encourage collaborative thought. In this study, I attempted to find out more about what occurs in the stages (prewriting, writing, post-writing) of collaborative writing. My subjects were petroleum engineers on university campuses. Departments were …

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Louisiana Agriculture Magazine, Spring 1993, Lsu Agricultural Experiment Station Apr 1993

Louisiana Agriculture Magazine, Spring 1993, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Seed Dormancy In Red Rice (Oryza Sativa): Changes In Embryo Ph And Metabolism During The Dormancy-Breaking Process., Steven Footitt Jan 1993

Seed Dormancy In Red Rice (Oryza Sativa): Changes In Embryo Ph And Metabolism During The Dormancy-Breaking Process., Steven Footitt

LSU Historical Dissertations and Theses

Hydrated, dehulled, dormant seeds of red rice (Oryza sativa L.) were exposed to chemical treatments (nitrite, propionic acid, methyl propionate, propionaldehyde, and n-propanol) that saturate the dormancy-breaking response. Dormancy-breaking chemicals were (a) metabolized (n-propanol and propionate) by embryos in dormant seeds to weak acids; (b) decreased embryo pH; and (c) increased embryo (Fru 2,6-P$\sb2$) prior to dormancy-breaking. Embryo acidification, but not increased embryo (Fru 2,6-P$\sb2$), was associated with the chemical contact interval required for the onset of dormancy-breaking. During chemical contact, embryo (Fru 2,6-P$\sb2$) increased independent of dormancy-breaking and was inversely correlated with the elapsed time to 30% germination. On …

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Autobiography As Repetition In The Works Of Walker Percy., Edward Joseph Dupuy Jan 1993

Autobiography As Repetition In The Works Of Walker Percy., Edward Joseph Dupuy

LSU Historical Dissertations and Theses

While many critics have explored some connections between Walker Percy's work and the philosophies of Soren Kierkegaard and Martin Heidegger, none has examined that link in terms of autobiography and autobiographical theory. This study looks at both Percy's fiction and nonfiction in light of the category of repetition and its relation to autobiography. Following largely the work of William Spanos, the first chapter establishes a reading of autobiography as repetition--understood as inter esse, "being between" and concerned in time. It then discloses a link between such a view of autobiography and Percy's diagnostic use of the novel. The remainder of …

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Lsu General Catalog 1993-1994, Louisiana State University And Agricultural And Mechanical College Jan 1993

Lsu General Catalog 1993-1994, 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.

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The Dynamics Of Collective Farming: A Case Study Of Fish Farm Cooperatives In The Prefectures Of Butare And Gikongoro, Rwanda., Alphonse Rubagumya Jan 1993

The Dynamics Of Collective Farming: A Case Study Of Fish Farm Cooperatives In The Prefectures Of Butare And Gikongoro, Rwanda., Alphonse Rubagumya

LSU Historical Dissertations and Theses

Cooperative fish farming not only insures a wider distribution of land and fish farming technology resources to larger segments of the population, but also makes possible the integration of limited individual resources into sizable and economically more viable production and marketing units. On the basis that more efficient internal organization can lead to greater cooperative performance, the purpose of this study is to identify organizational attributes and practices associated with effectiveness of fish farming cooperatives in Rwanda. Data for the study were obtained from a sample of 200 fish farm groups selected in the prefectures of Butare and Gikongoro, Rwanda. …

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