Digital Commons Network^™

Cognitive Distortions, Impulsivity, And Stressful Life Events In Suicidal Adolescents., Christine Sadowski

LSU Historical Dissertations and Theses

Among adolescents, escalating rates of completed and attempted suicide are reported worldwide (Maris, 1985). In the literature, a variety of risk factors have been associated with suicidality in adolescence. The purpose of this study was to examine the relationship between cognitive distortions, impulsivity, and stressful life events in suicidal adolescents. A total of 118 adolescents between the ages of 12 and 18 years participated in this investigation. The subjects comprised four groups: inpatient suicide attempters (n = 33); inpatient and outpatient suicide ideators (n = 17); inpatient, nonsuicidal controls (n = 33), and community high school controls(n = 35). Subjects …

Gwen Bristow: A Biography With Criticism Of Her "Plantation Trilogy"., Billie J. Theriot

LSU Historical Dissertations and Theses

Gwen Bristow was born September 16, 1903. Her father was a minister and church leader and her mother was a homemaker and housemother for residents of Southern Baptist Hospital nurses' home. Both had impressive genealogies. Bristow, a reporter in New Orleans for The Times-Picayune from July 9, 1925, to November 28, 1930, and February 5, 1932, to September 21, 1934, wrote for many periodicals throughout her life. Her marriage to Bruce Manning took her to Hollywood, where she lived from the summer of 1934 until late spring 1980. Bruce Manning's career as a script writer, director, and producer provided a …

Micro- And Macro-Experimental Investigations For Modeling Damage In Metal Matrix Composites., Anthony Ray Venson

LSU Historical Dissertations and Theses

Experimental investigations and procedures for the determination of damage are presented for the macro- and micro-analysis of a SiC-Titanium Aluminide metal matrix composite (MMC). Uniaxial tension tests are performed on laminate specimens of two different layups. The layups are balanced symmetric and given as (0/90)$\sb{s}$ and ($\pm45)\sb{s}$, each containing four plies. Dogbone shaped flat plate specimens are fabricated from each of the layups. Specimens for the different layups are loaded to various load levels ranging from rupture load down to 70% of the rupture load at room temperature. By loading specimens to various load levels, damage evolution is experimentally evaluated …

An Ethnographically Informed Case Study Of An Art Teacher Using Right Brain Drawing Instruction., Sara Jan Smith

LSU Historical Dissertations and Theses

The first and central purpose of this study was to identify and describe one high school art teacher's basis for incorporating into the curriculum right-brain drawing instruction based on Edwards' (1989) book, Drawing on the Right Side of the Brain. The second was to provide art educators with preliminary information about the right-brain theory's popularity that might assist them in future research on a larger scale. Computer searches of ERIC and PSYCH INFO were conducted to locate related research findings dealing with hemispheric function. The empirical findings were analyzed and compared to rationales for employing right-brain teaching strategies. The research …

Statistical Process Control Using On-Line Sensors., Wu-Shong Jwo

LSU Historical Dissertations and Theses

The traditional control chart method of SPC is a popular tool for monitoring a production process. The method involves randomly drawing a sample of finished items from the process at every equal-time interval to check the product quality and assess the process condition. Because of recent technological advances in computer automation, many kinds of on-line inspection and monitoring equipment, such as sensors, have been developed. This research proposes a two-phase method to monitor the production process during manufacturing operations. Basically, this method is a combination of an on-line sensor and a control-chart method. In the first phase, if the total …

Production Capabilities And Economic Potential Of An Australian Redclaw Crayfish (Cherax Quadricarinatus) Hatchery In The United States., Paul Boyce Medley

LSU Historical Dissertations and Theses

In most of the United States, overwintering redclaw crayfish (Cherax quadricarinatus) is necessary because they cannot withstand winter temperatures. Consequently, hatcheries are required to produce juveniles for pond stocking. The objectives of this study were: (1) identify biological factors affecting production of juvenile redclaw, (2) determine production capabilities of a redclaw crayfish hatchery, and (3) determine the economic potential of redclaw hatcheries. Experiments were designed to assess fecundity and factors influencing spawning such as stocking density, male/female weight, diet, mortality, and cannibalism. Research was also conducted to determine egg development time, hatching success, and juvenile growth and survival. Pooled survival …

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 …

There's No Place Like Home: An Analysis Of The Rhetoric Of Homelessness In A Judicial Opinion, An Advocate's Congressional Testimony, And Testimonial Narratives By The Homeless., Niki L. Young

LSU Historical Dissertations and Theses

The central question this dissertation seeks to answer is: What does homelessness mean, and how is that meaning rhetorically constructed? What homelessness means is not fixed nor static, but varies with use. To discover and develop these different meanings, three sets of data were examined: a judicial opinion, an advocate's congressional testimony, and testimonial narratives by the homeless. This data includes rhetoric produced from three distinct points of view--one that is sympathetic to the homeless, one that is hostile to the homeless, and one that has experienced homelessness. A Burkean methodology was employed, supplemented, where appropriate, with insights from postmodern …

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.

Intraspecific Variation In The Response Of Baldcypress (Taxodium Distichum) Seedlings To Salinity., James Andrew Allen

LSU Historical Dissertations and Theses

This study evaluated genotypic variation in responses of baldcypress (Taxodium distichum) seedlings to combined flooding and salinity stress. Two experiments form the core of this dissertation. In the first experiment, seedlings of 15 open-pollinated families of baldcypress were exposed to combined salinity and flooding stress under greenhouse conditions. Ten of the families were from coastal locations that were slightly brackish. The other families were from freshwater locations. Five salinity levels were investigated--0, 2, 4, 6, and 8 g l$\sp{-1}$ artificial seawater--all with shallow flooding. Substantial variation was found among salinity levels and families for most of the response variables assessed. …

The Effect Of Carbon Dioxide Concentration On Carbonic Anhydrase And Other Proteins In Chlamydomonas Reinhardtii., Mamta Rawat

LSU Historical Dissertations and Theses

Unicellular green algae, like Chlamydomonas reinhardtii, are able to grow photoautotrophically at low levels of CO$\sb2$. The efficient growth at low CO$\sb2$ levels is a reflection of the CO$\sb2$ concentrating mechanism that is induced when cells are adapted to low CO$\sb2$ levels. In this dissertation, the effect of CO$\sb2$ on carbonic anhydrase and other proteins in C. reinhardtii is discussed. In the first part of the dissertation, the isolation and purification of a new isoenzyme of carbonic anhydrase is reported. This carbonic anhydrase is present when cells are grown in high CO$\sb2$ but absent in low CO$\sb2$. It is located …

Feasibility Studies Of Radionuclide Removal From Kaolinite By Electrokinetic Soil Processing., Dionisio Alberto Ugaz

LSU Historical Dissertations and Theses

Electrokinetic soil processing is an emerging remediation technique with the capability to decontaminate low permeability soils containing heavy metals and some organics. The process consists on applying small current densities between electrodes immersed in the soil mass; the electrochemistry developed across the system causes desorption and transport of the contaminants to the electrodes where, depending on their chemistry, they precipitate, electrodeposit, or elute with the electroosmotic flow. Its potential to remove selected radionuclides (uranium-238, thorium-232, and radium-226) is assessed in the present studies. The process removed 85 to 95% uranium-238 at 1000 pCi/g activity from kaolinite. Complicating features arise (i.e. …

A Study Of Nontraditional Referral And Screening Of Culturally Different Gifted Children., Jo Anne Welch

LSU Historical Dissertations and Theses

The purpose of this study was to determine the effectiveness of using nontraditional referral and screening procedures to identify culturally different (minority) gifted children. The extreme disparity of representative frequencies of these groups within gifted programs nationally and in Louisiana prompted research in four parishes (counties) to compare nontraditional with traditional identification procedures. The nontraditional referral procedures included child search methods and parent and teacher training about the characteristics of giftedness among culturally different populations. Nontraditional screening procedures included the use of creativity and leadership checklists, analysis of achievement in all academic areas, and the use of the Matrix Analogies …

Structural Equation Modeling Analysis Of Risk Factors For The Development Of Eating Disorder Symptoms In Adolescents., Susan Elizabeth Barker

LSU Historical Dissertations and Theses

Risk factors which have been shown to influence the development of body dissatisfaction and eating disturbance in adolescents include depressed mood, low self-esteem, a history of teasing about physical appearance, social and parental pressure to be thin, pubertal timing, and actual body weight or body mass index. In the present study, an etiological model was proposed with these risk factors as predictors of the presence of eating disorder symptoms; this association was hypothesized to be mediated by dissatisfaction with body shape and weight. Structural equation modeling was used to test this theoretical model within a total sample of 345 adolescent …

The Thousand Appliances: Virginia Woolf And The Tools Of Visual Literacy., Janice M. Stein

LSU Historical Dissertations and Theses

The texts of Virginia Stephen Woolf are rife with references to writers' tools, which she referred to in her diary as "the thousand appliances one needs for writing even a sentence." This dissertation examines the exact nature of Woolf's "need" for the tools of her craft and their influence upon her thought and art. Pens, and by association, ink and the writer's hands, were the center of all her authorial experiences and provided the literal link between the idea of art and its fruition as a work of art. The graphic shapes of words and paralinguistic devices such as punctuation …

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

Faculty Publications

No abstract provided.

Louisiana Agriculture Magazine, Fall 1993, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Cone Penetration In Cemented Deposits-A Field Study, Semih Arslan

LSU Historical Dissertations and Theses

Neglecting cementation results in an underestimation of slope stability and pile capacity in design and analysis of geotechnical engineering problems related to cemented deposits. Developing methods to identify and assess the engineering characteristics of cemented deposits is an important subject in geotechnical engineering.

This study is conducted to evaluate the reliability of the prediction schemes proposed by previous investigators through a field study of cone penetration in a cemented deposit and respective laboratory triaxial study on undisturbed cemented specimens. The effect of cementation on cone penetration resistance is investigated through the field study, and the effects of cementation on drained …

Louisiana Agriculture Magazine, Spring 1993, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Wise Economies: Storytelling, Narrative Authority, And Brevity In The American Short Story, 1819-1980., Kirk Lee Curnutt

LSU Historical Dissertations and Theses

This study proposes a new way of measuring brevity in the American short story. Since Edgar Allan Poe's definition of the tale, literary criticism has looked to various structural features within the text to define the elements that distinguish the short story from other prose genres like the novel. I argue that brevity is an essential feature of storytelling and suggest that its perception is molded and shaped by several historical factors. The phrase "wise economy" offers two ways of thinking about the conciseness of the form: it evokes a history of rhetorical economy central to the formation of a …

Learning Styles And Selected Demographic Characteristics Of Dislocated Workers., Samuel Lewis Harvill Sr

LSU Historical Dissertations and Theses

The purpose of this study was to: (1) describe dislocated workers in Louisiana by learning styles and demographics; (2) compare learning style by demographics; and, (3) determine if learning style is independent of occupational area. A simple random sample of 235 dislocated worker participants was drawn from participants served in the Louisiana Job Link Center at Louisiana State University during FY89 through FY91. Data were collected using two instruments. The researcher designed recording form was used to enter the demographic variables gender, ethnicity, age, educational level, and occupational areas (DOT) codes. The Gregorc Style Delineator identified the preferred learning style …

Predicting Performance On The National Dietetic Registration Exam., Rachel Martin Fournet

LSU Historical Dissertations and Theses

The purpose of this study was to determine if relationships exist between student demographic or personal data, academic achievement and student perceptions of factors relative to predicting performance on the Registration Dietetic (R.D.) Exam. Perceptions of factors relative to predicting performance on the R.D. exam was also determined from undergraduate dietetic program directors, to explore the extent of agreement between students and educators. This information was used to develop a predictive model explaining a significant proportion of the variance in R.D. exam scores. A researcher designed questionnaire was administered to a nationwide random sample of first time eligible candidates for …

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.

Methane Consumption In Temperate And Subarctic Forest Soils: Rates, Vertical Zonation, And Responses To Water And Nitrogen, A. P.S. Adamsen, G. M. King

Faculty Publications

Rates of methane consumption were measured in subarctic coniferous and temperate mixed-hardwood forest soils, using static chambers and intact soil cores. Rates at both sites were generally between 1 and 3 mg of CH4 m-2 day-1 and decreased with increasing soil water contents above 20%. Addition of ammonium (1 μmol g of soil-1) strongly inhibited methane oxidation in the subarctic soils; a lesser inhibition was observed for temperate forest samples. The response to nitrogen additions occurred within a few hours and was probably due to physiological changes in the active methane-consuming populations. Methane consumption in soils from both sites was …

Application Of A Tetrazolium Salt With A Water-Soluble Formazan As An Indicator Of Viability In Respiring Bacteria, P. Roslev, G. M. King

Faculty Publications

The tetrazolium salt sodium 3'-{1-[(phenylamino)-carbonyl]-3,4- tetrazolium}-bis (4-methoxy-6-nitro)benzene-sulfonic acid hydrate (XTT) was examined for use as a colorimetric indicator of viability in respiring bacteria. XTT was reduced to an orange, water-soluble formazan product by Methylosinus trichosporium OB3b, Pseudomonas putida, Escherichia coli, and Bacillus subtilis. Formazan production was proportional to live cell biomass, and XTT was reduced by all cultures in the absence of added electron-coupling agents. XTT reduction by M. trichosporium OB3b was linear over several hours and was stimulated by the presence of an exogenous substrate (methanol). Addition of cyanide to cultures incubated under oxic conditions gave an initial 10-fold …

Glycine And Alanine Supplementation Of Culture Medium Enhances Development Of In Vitro Matured And Fertilized Cattle Embryos, K. Moore, K. R. Bondioli

Faculty Publications

One-cell cattle embryos were prepared by in vitro oocyte maturation and fertilization (IVM/IVF) and cultured with or without oviductal cells. Embryos were evaluated after 7 days in culture to determine the percentage developing from the 1-cell stage to the morula or blastocyst stage. The combination of glycine (2 mM) and alanine (1 mM) with oviductal cells (experiment 1) improved embryo development over that in control culture (29 vs. 13%; p < 0.05). An optimum response was obtained with 10 mM glycine and 1 mM alanine in coculture (experiments 2 and 3). In experiment 4, the effects of glycine (0 or 10 mM), alanine (0 or 1 mM), and the presence or absence of oviductal cells were tested. In the absence of oviductal cells, the addition of glycine, alanine, or glycine and alanine combined improved embryonic development over that in control medium (45, 33, 42 vs. 24%, p < 0.001, p < 0.05, p < 0.001, respectively). However, the effect of the combination of glycine and alanine was not different from that of glycine alone when oviductal cells were absent (42 vs. 45%, p > 0.10). In the presence of oviductal cells, glycine or the combination of glycine and alanine improved embryonic development over that in the control medium with cells (47, 55 vs. 37%, …

Studies On Hepatitis A Virus: I. Expression Of Viral Capsid Peptides In Escherichia Coli And Their Application For An Immunoassay. Ii. Development Of An Assay For Viral Detection By Anti-Hav Antibodies., Luis Antonio Baez

LSU Historical Dissertations and Theses

A panel of eleven monoclonal antibodies of the IgG and IgM class were developed against the HM 175 strain of the Hepatitis A virus. Immunoglobulin specificity for the Hepatitis A virus was determined and the antibodies were applied toward the development of an antigen capture assay linked to a nucleic acid amplification step (RT-PCR), for detection of the Hepatitis A virus. The neutralizing mouse monoclonal antibody and a rabbit polyvalent serum were assessed as capture antibodies for the immunoaffinity stage of the assay. Fifty microliter microfuge tubes were coated with the capture antibody. Formalin inactivated HAV was diluted to concentrations …

Characterization Of The Subunits Of The Mcrbc Restriction System In Escherichia Coli K12., Timothy Paul Beary

LSU Historical Dissertations and Theses

The McrBC (Modified Cytosine Restriction) restriction system has the ability to restrict DNA containing 5-hydroxymethylcytosine, N$\sp4$-methylcytosine, and 5-methylcytosine at specific sequences. The mcrB gene produces two gene products. The complete mcrB open reading frame produces a 53-kDa protein (McrB$\sb{\rm L}$) and a 35-kDa protein (McrB$\sb{\rm S}).$ The smaller McrB polypeptide is produced from an inframe, internal translational start in the mcrB gene. The mcrC gene produces a single 38-kDa protein. Evidence was presented that McrB$\sb{\rm S}$ regulates the activity of McrBC. When McrB$\sb{\rm S}$ was overproduced in a McrBC$\sp+$ background, there was dramatic loss of restriction. Underproduction of this protein …

Effects Of Subtitled Video During Transactional Task Practice On Oral Communicative Performance Of Fifth Semester College Students Of French Learning With Multimedia Courseware., Isabel Borras

LSU Historical Dissertations and Theses

The purpose of this study was to investigate the effectiveness of subtitled video during transactional task practice on oral communicative performance of fifth semester college students of French learning with multimedia courseware. Task practice was provided by the multimedia package, "Practicing Spoken French" (PSF) specifically designed by the researcher for this study. The package, which integrates HyperCard and videodisc technologies, allows for individually customized practice of two video-based oral tasks, description and narration. Drawing on Salomon's theories about the effects of media coding elements and perception of task on cognition and learning, the study used a 2 x 2 factorial …

Photosynthetic Response To Elevated Carbon Dioxide Concentrations In The Aerenchyma Of Typha Latifolia L. Leaves., John Van Horne Constable

LSU Historical Dissertations and Theses

This study examined the importance of the leaf aerenchyma gas space as a CO$\sb2$ source for photosynthesis in Typha latifolia L. (broadleaf cattail). In the field there was a distinct diurnal pattern of CO$\sb2$ concentration ( (CO$\sb2$)) in the aerenchyma gas space. At dawn the aerenchyma (CO$\sb2$) was 4 to 18 times above atmospheric levels. By midday the aerenchyma (CO$\sb2$) declined to near atmospheric levels and increased again in the late afternoon. It is hypothesized that this diurnal pattern may be controlled by photosynthetic demand for CO$\sb2$. Aerenchyma gas space was estimated as $>$50% of leaf volume, and the …