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Attributions Of Teachers And Students In Middle School Science Classrooms., Lennie Holomon Rhys Jan 1990

Attributions Of Teachers And Students In Middle School Science Classrooms., Lennie Holomon Rhys

LSU Historical Dissertations and Theses

The purpose of the present study was to examine: (a) teachers' notions about their students, (b) students' notions about themselves and learning, and (c) important factors that characterize, and possibly influence, these notions. The investigation was based on attribution theory, which proposes a framework for ascribing causes of a person's behavior, given that person's belief system. In this study, five notions, or attributions, were specified: attachment, concern, satisfied, indifferent, and rejection, and were expressed in three forms: oral, written, and behavioral. Subjects included three sixth-grade science teachers, three eighth-grade science teachers, and one science class from each teacher's schedule. For …

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I. Temporal Compression In Chirped Pulse Regenerative Amplification. Ii. Picosecond Time-Resolved Raman Study Of Excited State Charge Transfers., Yong Joon Chang Jan 1990

I. Temporal Compression In Chirped Pulse Regenerative Amplification. Ii. Picosecond Time-Resolved Raman Study Of Excited State Charge Transfers., Yong Joon Chang

LSU Historical Dissertations and Theses

The chirped pulse regenerative amplification in Nd:YAG lasers is demonstrated to be able to provide picosecond optical pulses with $\sim$gigawatt peak powers at a repetition rate of 2kHz. By taking advantage of the effects of gain narrowing and gain saturation in the regenerative amplifier, it is shown that the chirped amplified pulse width can be varied systematically from $\sim$12ps to 150ps. These high peak power pulses were utilized to perform several picosecond time-resolved resonance Raman spectroscopic experiments. One study involves the investigation of excited state electron transfer in symmetric and asymmetric polypyridineruthenium(II) complexes. The competing influences of solvent relaxation, vibrational …

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Evaluation Of Aeromonas Hydrophila Virulence Factors: Role In Natural Epizootics And Their Use As Potential Immunogens., Larisa Ann Ford Jan 1990

Evaluation Of Aeromonas Hydrophila Virulence Factors: Role In Natural Epizootics And Their Use As Potential Immunogens., Larisa Ann Ford

LSU Historical Dissertations and Theses

Aeromonas hydrophila and A. sobria have been identified as major causes of mortalities among commercially raised channel catfish and are the cause of septicemic diseases in a wide variety of other animals. At present, antibiotic therapy is the only prescribed treatment for Motile Aeromonad Septicemia (HAS) in channel catfish. Antibiotic treatment, however, is expensive and often not effective due to the development of resistance in the bacterial strains. Development of immunoprophylatic methods for the prevention of HAS would be of value and use to the commercial catfish industry. Several studies have demonstrated that whole cell vaccine preparations do not confer …

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Management Of Tobacco Budworm, Heliothis Virescens (F.) And Bollworm, Helicoverpa Zea (Boddie) In Cotton: Host Plant Resistance And Ovicidal Approaches., Billy Rogers Leonard Jan 1990

Management Of Tobacco Budworm, Heliothis Virescens (F.) And Bollworm, Helicoverpa Zea (Boddie) In Cotton: Host Plant Resistance And Ovicidal Approaches., Billy Rogers Leonard

LSU Historical Dissertations and Theses

Growth, development and survival of pyrethroid-resistant (PY-R) and -susceptible (PY-S and FIELD-88) tobacco budworm, Heliothis virescens (F.), and bollworm (CORN-BW), Helicoverpa zea (Boddie), were compared on four cotton lines ('Deltapine 41', La. HG-660, La. HG-063 and PD-0804) and artificial diet. The FIELD-88 and CORN-BW strains had significantly higher 5 and 9 day larval weights compared to the PY-R and PY-S laboratory strains. Larvae fed squares of La. HG-660 and La. HG-063 had significantly lower larval and pupal weights, required significantly more days to pupate and had higher cumulative mortality compared to those reared on squares of a commercial cultivar, Deltapine …

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Investigation Of Flow Patterns In Various Wastewater Treatment Facilities, Thomas Joseph Martin Jr Nov 1989

Investigation Of Flow Patterns In Various Wastewater Treatment Facilities, Thomas Joseph Martin Jr

LSU Historical Dissertations and Theses

The theoretical hydraulic retention time of wastewater treatment plants is often used to predict the efficiency of treatment and to calculate operational parameters. However, these values are related to the actual hydraulic retention time. When there is a large discrepancy between the actual and predicted values, the actual hydraulic retention time can be determined by marking a parcel of wastewater and recording its passage through the system. This investigation utilized rhodamine WT, a fluorescent dye, to track the movement of wastewater through a stabilization lagoon and a rock-reed filter. The loss of rhodamine WT to sorption, biodegradation and photodegradation was …

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Louisiana Agriculture Magazine, Fall 1989, Lsu Agricultural Experiment Station Oct 1989

Louisiana Agriculture Magazine, Fall 1989, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Lumières, Fall 1989, Louisiana State University And Agricultural & Mechanical College Oct 1989

Lumières, Fall 1989, Louisiana State University And Agricultural & Mechanical College

Friends of the LSU Libraries

The bi-annual newsletters from the Friends of the Library contain information about upcoming and recent events, descriptions of new collections, a list of members, and occasional obituaries, which inform members of the news and needs of the LSU Libraries.

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Louisiana Agriculture Magazine, Spring 1989, Lsu Agricultural Experiment Station Apr 1989

Louisiana Agriculture Magazine, Spring 1989, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Lsu General Catalog 1989-1990, Louisiana State University And Agricultural And Mechanical College Jan 1989

Lsu General Catalog 1989-1990, 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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Nitrogen Fixation In Beggiatoa, Vitreoscilla, And Thiothrix., James Kevin Polman Jan 1989

Nitrogen Fixation In Beggiatoa, Vitreoscilla, And Thiothrix., James Kevin Polman

LSU Historical Dissertations and Theses

Many strains of Beggiatoa, Vitreoscilla, and Thiothrix were found to be capable of nitrogen fixation and to harbor plasmid DNA of various sizes, including large plasmids, and several plasmids in the 12 to 15 Mdal size range. Nitrogenase induction and activity in Beggiatoa alba were studied with respect to the effects of oxygen, pH, temperature, and nitrogenous compounds. Induction required microaerobic conditions. Nitrate and nitrite repressed induction, but glutamine did not. A pH optimum of 6.5 to 8.0 and a temperature optimum of 29$\sp\circ$C were observed. Nitrogenase activity was immediately and incompletely inhibited by ammonium, but was not inhibited by …

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Adolescent Alcohol Expectancies And Alcohol Use As Functions Of Familial Factors., Andrew Ward Millar Jan 1989

Adolescent Alcohol Expectancies And Alcohol Use As Functions Of Familial Factors., Andrew Ward Millar

LSU Historical Dissertations and Theses

In an extension of Brown, Creamer and Stetson (1987), this study investigated the relationships between components of family life, adolescent drinking and alcohol expectancies. Alcohol expectancies are defined as the learned associations between alcohol consumption and the results of drinking. Out of 73 adolescent (12- to 18-year old) subjects screened, 55 met criteria and participated in two comparisons with multiple dependent variables. In the first of these, 15 subjects who were exposed to alcoholics for at least 75% of their lives were found to have stronger expectations that alcohol would provide cognitive and motor enhancement than did 15 matched subjects …

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A Knowledge-Based System For Message Translation. (Volumes I And Ii)., John Mark Usher Jan 1989

A Knowledge-Based System For Message Translation. (Volumes I And Ii)., John Mark Usher

LSU Historical Dissertations and Theses

This research addresses the use of a knowledge-based interface to provide the communication service of message translation. The focus of this research is on the technical feasibility of using a knowledge-based design to perform this service for programmable devices on the shop-floor. The uniqueness of this approach is in the use of a knowledge-based design for the software interface. This method of implementation is different from the procedural programming approach used in today's custom interfaces. This research asserts that use of a knowledge-based design will result in an interface system that is easier to construct and maintain than an interface …

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Characterization Of Alkylation Repair And Comparison To Other Stress-Inducible Phenomenon In Drosophila., Sami Noshir Guzder Jan 1989

Characterization Of Alkylation Repair And Comparison To Other Stress-Inducible Phenomenon In Drosophila., Sami Noshir Guzder

LSU Historical Dissertations and Theses

Drosophila melanogaster employs methyltransferase protein(s) to repair lesions in alkylated DNA in vitro (Green and Deutsch, 1983). This investigation deals with the characterization of the methyltransferase protein(s), and their inducibility in the organism upon exposure to alkylating agents. Ammonium sulfate fractionation of crude extracts from pupae resulted in the enrichment (approximately 15-fold in both the 50% and 30% ammonium sulfate supernatants) of the methyltransferase activity(s). Proteins with molecular weights of 30 Kd and 19 Kd were evident by SDS-PAGE analysis of crude extracts; the 30 Kd and 19 Kd could be separated in the 50% ammonium sulfate supernatant and 30% …

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Early Embryonic Development In Vitro By Coculture With Oviductal Epithelial Cells In Pigs, K. L. White, K. Hehnke, L. F. Rickords, L. L. Southern, D. L. Thompson, T. C. Wood Jan 1989

Early Embryonic Development In Vitro By Coculture With Oviductal Epithelial Cells In Pigs, K. L. White, K. Hehnke, L. F. Rickords, L. L. Southern, D. L. Thompson, T. C. Wood

Faculty Publications

This experiment was designed to evaluate the ability of three different somatic cell cultures to promote development of early cleavage stage pig embryos. A total of 245 2-cell, 4-cell, 8-cell, and 16-cell pig embryos were cocultured for 5 days with porcine oviductal epithelial cells (POEC), porcine fetal fibroblast monolayer (PEF), a combined POEC and PEF coculture system (PEF-POEC), or Dulbecco's Modified Eagle Medium alone (DMEM). Embryos were collected at slaughter from the reproductive tracts of superovulated prepubertal gilts. Embryos were recovered, evaluated, and randomly placed in one of the four treatment groups. POEC were recovered from oviductal flushes, washed, and …

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Studies On Trypanosoma Cruzi Isolates From Louisiana Mammals With Particular Reference To Infectivity To Dogs., Stephen Charles Barr Jan 1989

Studies On Trypanosoma Cruzi Isolates From Louisiana Mammals With Particular Reference To Infectivity To Dogs., Stephen Charles Barr

LSU Historical Dissertations and Theses

This dissertation describes studies on three Trypanosoma cruzi isolates from Louisiana mammals with particular reference to infectivity to dogs. Isolates from an opossum (Tc-O) and armadillo (Tc-A) were obtained during a blood culture survey of these animal populations in Louisiana. Prevalence of T. cruzi were 37.5% and 1% in opossums and armadillos respectively. Further, 48% opossums had myocarditis suggestive of T. cruzi infection. Rural dogs with known contact with T. cruzi hosts, housed rural dogs, urban animal shelter dogs and household pets showed 4.7, 0, 2.3 and 0% serological prevalence to T. cruzi respectively. Tc-O and Tc-A (wild isolates) displayed …

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Isolation, Characterization, And Symbiotic Effectiveness In Soybeans Of Exopolysaccharide Mutants Of Rhizobium Fredii Usda191., Young Hwan Ko Jan 1989

Isolation, Characterization, And Symbiotic Effectiveness In Soybeans Of Exopolysaccharide Mutants Of Rhizobium Fredii Usda191., Young Hwan Ko

LSU Historical Dissertations and Theses

Chapter 1. Production of exopolysaccharides by Rhizobium has been linked with efficient invasion and nodulation of leguminous plant roots by the bacteria. Exopolysaccharide-deficient (exo) mutants of Rhizobium fredii USDA191 were isolated by Tn5-insertion mutagenesis. Five phenotypically unique exo mutants were investigated for exopolysaccharide synthesis and their ability to nodulate soybeans. The exopolysaccharides produced by these mutants were analyzed for polysaccharide composition by column chromatography and thin layer chromatography. Two mutants designated exo3 and exo5 were deficient in both the neutral glucan and exopolysaccharide synthesis, but still made effective nodules on Glycine max cv. Peking, although with decreased efficiency. The remaining …

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Use Of Infrared Piezobirefringence For Observation Of Dislocations In Semiconductors With Cubic Symmetry., Aloke Kumar Dutta Jan 1989

Use Of Infrared Piezobirefringence For Observation Of Dislocations In Semiconductors With Cubic Symmetry., Aloke Kumar Dutta

LSU Historical Dissertations and Theses

The use of infrared piezobirefringence for characterization of defects in cubic semiconductor materials is investigated in this work. Under stress, these normally isotropic materials become birefringent. The stress can result from an applied external load or from defects present in the material. Defects can be generated in the material during its growth and/or processing. As a first step towards defect characterization, the case of diametrically loaded discs of semiconductor materials was simulated. This was done to obtain a better understanding of the simulation algorithm prior to its subsequent use in dislocation characterization. A dark-field plane polariscope was constructed using a …

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Development And Field Applications Of Shaly Sand Petrophysical Models., Milton Noel Lau Jan 1989

Development And Field Applications Of Shaly Sand Petrophysical Models., Milton Noel Lau

LSU Historical Dissertations and Theses

A new, theoretically derived model expressing shaly sand conductivity is presented. The proposed model is based on dual water and cation exchange capacity concepts. The new model is based on the Waxman and Smits concept of supplementing the water conductivity with a clay counterions conductivity. The model also utilizes the dual water theory, which relates each conductivity term to a particular type of water, each occupying a specific volume of the total pore space. The proposed model, however, assumes that the counterion conductivity can be represented by a hypothetical electrolyte. The properties of this electrolyte were derived from electrochemical and …

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The Synthesis Of Constrained And Benzannulated Derivatives Of The Essential Amino Acids Tyrosine And Tryptophan., Marco A. Vela Jan 1989

The Synthesis Of Constrained And Benzannulated Derivatives Of The Essential Amino Acids Tyrosine And Tryptophan., Marco A. Vela

LSU Historical Dissertations and Theses

Benzannulated and a series of constrained derivatives of the essential amino acids tyrosine and tryptophan were synthesized. The synthesis of the two benzannulated tyrosine analogs followed traditional synthetic protocols that basically consisted of obtaining key oxazolones and further elaboration to the target amino acids; the latter compounds were obtained as racemic mixtures. All the reaction intermediates were fully characterized spectroscopically, and when possible, structure proof was established by X-ray crystallographic determinations. Asymmetric hydrogenation studies on the intermediate (Z)-2-benzoylaminoacrylic acids were undertaken in an effort to obtain enantiomerically pure materials. The products were, in fact, chiral upon hydrogenation in the presence …

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Analytical Studies Of Wireline Formation Testing And Pressure Losses Across Gravel Packs., Turhan Yildiz Jan 1989

Analytical Studies Of Wireline Formation Testing And Pressure Losses Across Gravel Packs., Turhan Yildiz

LSU Historical Dissertations and Theses

A three-dimensional (3-D) analytical model was developed to improve the analyses of the transient pressure response of a reservoir to wireline formation testing (WFT). Available analysis techniques of the WFT oversimplify the flow geometry by assuming either a radial or a spherical flow pattern. The proposed model simulates the exact flow geometry of the WFT flow pattern. The model was derived by solving the 3-D diffusivity equation coupled with the boundary conditions prevailing during the test. The Laplace transformation and the separation of variables were used to obtain the solution. The solution is expressed in terms of the infinite Fourier-Bessel …

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Localization Of Tissue Factor In The Normal Vessel Wall And In The Atherosclerotic Plaque, J. N. Wilcox, K. M. Smith, S. M. Schwartz, D. Gordon Jan 1989

Localization Of Tissue Factor In The Normal Vessel Wall And In The Atherosclerotic Plaque, J. N. Wilcox, K. M. Smith, S. M. Schwartz, D. Gordon

Faculty Publications

Tissue factor (TF)-producing cells were identified in normal human vessels and atherosclerotic plaques by in situ hybridization and immunohistochemistry using a specific riboprobe for TF mRNA and a polyclonal antibody directed against human TF protein. TF mRNA and protein were absent from endothelial cells lining normal internal mammary artery and saphenous vein samples. In normal vessels TF was found to be synthesized in scattered cells present in the tunica media as well as fibroblast-like adventitial cells surrounding vessels. Atherosclerotic plaques contained many cells synthesizing TF mRNA and protein. Macrophages present as foam cells and monocytes adjacent to the cholesterol clefts …

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Louisiana Agriculture Magazine, Winter 1989-1990, Lsu Agricultural Experiment Station Jan 1989

Louisiana Agriculture Magazine, Winter 1989-1990, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Comparison Of Clinical Isolates Of Klebsiella Pneumoniae To Klebsiella Sp. Isolated From Summer Harvested Eastern Oysters, Crassostrea Virginica (Gmelin)., Thomas Elbert Graham Jan 1989

Comparison Of Clinical Isolates Of Klebsiella Pneumoniae To Klebsiella Sp. Isolated From Summer Harvested Eastern Oysters, Crassostrea Virginica (Gmelin)., Thomas Elbert Graham

LSU Historical Dissertations and Theses

Suspected environmental fecal coliform positive Klebsiella sp. oyster isolates were analyzed and compared to human clinical isolates of Klebsiella pneumoniae. Oyster isolates were urease negative (at 24 hours) and were identified as K. pneumoniae using API 20E biochemical test strips. The ability to produce fecal coliform reactions was lost by 65% of the oyster isolates after undergoing several passages on brain-heart-infusion agar at 20$\sp\circ$ to 25$\sp\circ$C. Tests with 4-methylumbelliferyl-B-d-glucuronide (MUG) found both oyster and clinical isolates to be MUG negative. Moles % guanine plus cytosine (mol% G + C) information indicated that oyster isolates had mol% G + C values …

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Real-Time Effective Stress Evaluation In Shales: Pore Pressure And Permeability Estimation., Jean-Louis Jerome Alixant Jan 1989

Real-Time Effective Stress Evaluation In Shales: Pore Pressure And Permeability Estimation., Jean-Louis Jerome Alixant

LSU Historical Dissertations and Theses

In this dissertation, a general method to determine the vertical effective stress in shales while drilling is developed. The concept is applied to the development of a model restricted to sodium smectitic shales, which are interpreted using Measurement-While-Drilling (MWD) resistivity data. Effective stress is introduced as the key parameter in the evaluation of petrophysical properties of shales, which provides a wide range of applications to the method. The model comprises two interpretation modules: an electrical module converts shale resistivity into porosity using a new formation factor relationship adapted from previous work, and a mechanical module relates porosity to void ratio …

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Readability Of Mass Mailing Written Material Produced At The County Level Of The Alabama Cooperative Extension Service., Earl Crawford Johnson Jan 1989

Readability Of Mass Mailing Written Material Produced At The County Level Of The Alabama Cooperative Extension Service., Earl Crawford Johnson

LSU Historical Dissertations and Theses

The objectives of this study were to assess the readability of the mass mailing written material produced at the county level of the Alabama Cooperative Extension Service, and to determine the variance in readability explained by selected variables. A mail questionnaire to 100 randomly selected county agents was used, with a 98% response rate. Readability of agents' mass mailing written material was assessed using the Fry Readability Graph. Descriptive statistics and correlation coefficients were calculated. Stepwise multiple regression at the.05 level was used to develop a model which explained readability of material. Findings indicated that respondents spent about six hours …

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Lipopolysaccharide Serotyping Of Vibrio Vulnificus., Stephen Jeffrey Martin Jan 1989

Lipopolysaccharide Serotyping Of Vibrio Vulnificus., Stephen Jeffrey Martin

LSU Historical Dissertations and Theses

Current schemes used to serotype Vibrio vulnificus are based on direct bacterial agglutination using polyclonal rabbit antisera. During the course of serotyping Louisiana V. vulnificus isolates we failed to observe a reproducible agglutination profile for these isolates. The major obstacle in producing serovar specific sera has been the failure to produce high titered anti-LPS sera in rabbits. Anti-LPS serum from rabbits immunized with formalin-killed, heat-killed, or acetone dried whole cell vaccines and LPS-carrier conjugates uniformly produced titers $\leq 320$. Separation of anti-LPS activity from whole sera by affinity chromatography also yielded low titered antisera. A typing system predicated on the …

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Effects Of Cocaine Use And Withdrawal On Clinical Memory And New Learning., Madeline Uddo-Crane Jan 1989

Effects Of Cocaine Use And Withdrawal On Clinical Memory And New Learning., Madeline Uddo-Crane

LSU Historical Dissertations and Theses

This project was conceptualized as an exploratory examination of the neuropsychological sequelae of cocaine abuse, specifically the drug's effect on new learning and memory. The experimental groups were composed of 30 veterans enrolled in a drug treatment program for cocaine abuse. This group was divided equally by route of administration, i.e., group one included 15 individuals whose preferred route of administration was intravenous injection; group two included 15 individuals whose preferred route of administration was smoking. The comparison group consisted of 15 individuals enlisted in the National Guard. The groups were essentially homogeneous, with a mean age of 34.6 ($SD$ …

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Agrobacterium Tumefaciens - Mediated Transfer Of Plant Dna For Gene Expression Analysis., Woo Sung Lee Jan 1989

Agrobacterium Tumefaciens - Mediated Transfer Of Plant Dna For Gene Expression Analysis., Woo Sung Lee

LSU Historical Dissertations and Theses

Agrobacterium tumefaciens causes crown gall tumor primarily in dicotyledonous plants. The infection mechanism reveals that a portion of bacterial DNA (T-DNA) is transferred into the plant nuclear genome. This transformation system is widely utilized in plant genetic engineering and plant molecular biology. In this dissertation, two experiments were carried out. First, the copy number, physical structure and F1 segregations of T-DNA copies were analyzed, attempting to understand the mode of T-DNA integration into the plant genome. While the mechanism of Agrobacterium response to plant signals and generation and transfer of T-DNA intermediates through actions of virulence genes is generally understood, …

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Molecular Biological Studies On The Degradation Of Diphenyl Ethers By Bacteria., Hung-Ming James Liaw Jan 1989

Molecular Biological Studies On The Degradation Of Diphenyl Ethers By Bacteria., Hung-Ming James Liaw

LSU Historical Dissertations and Theses

Microbial degradation of diphenyl ethers was studied utilizing several different approaches. The first approach was to isolate mutants from a ligninolytic Erwinia sp. by conventional mutagenesis and selection. A copper-resistant mutant, designated as Erwinia sp. CU3614, was isolated and characterized to be capable of degrading diphenyl ethers as well as one dibenzo-p-dioxin in the presence of copper ions. Isolation of Tn5 transposon-induced mutants of Erwinia sp. CU3614, which lost degradation ability, demonstrated that in all probability a copper-associated activity in the biotransformation of aromatic ethers was involved. In order to study the degradation at the molecular biological level, a 2.1 …

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The Macroeconomics Of Presidential Popularity., Susan Katherine Washburn Jan 1989

The Macroeconomics Of Presidential Popularity., Susan Katherine Washburn

LSU Historical Dissertations and Theses

This thesis examines several issues dealing with the public's social preference function between inflation and unemployment. First, the preference function is estimated as a nonlinear function. Second, the thesis analyzes the ability of a presidential administration to improve its popularity level by exploiting a short-run Phillips curve. Finally, preference functions disaggregated by sex, race, political party, and geographical region are estimated. Presidential approval levels are proxied by monthly Gallup Poll approval data. Chapter One serves as an overview of the current body of literature. While theoretical analyses of macroeconomic policy have traditionally assumed that the public's social preference function is …

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