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Articles 34381 - 34410 of 45177
Full-Text Articles in Entire DC Network
Hate Then, Hate Now: The Roots Of Racial Violence In The United States And Germany, Sabrina Cusimano
Hate Then, Hate Now: The Roots Of Racial Violence In The United States And Germany, Sabrina Cusimano
Honors Capstones
No abstract provided.
Multiplex Pcr Detection Of Aac(3)Via And Aac(3)Iia Gentamicin Resistance Genes In Bacteria Isolated From Turtle Farms, Hilary Haines
Multiplex Pcr Detection Of Aac(3)Via And Aac(3)Iia Gentamicin Resistance Genes In Bacteria Isolated From Turtle Farms, Hilary Haines
Honors Capstones
No abstract provided.
The Effect Of Phytase On Nutrient Availability In Diets For Swine And Poultry., Sara Leann Johnston
The Effect Of Phytase On Nutrient Availability In Diets For Swine And Poultry., Sara Leann Johnston
LSU Historical Dissertations and Theses
A series of experiments was conducted to determine the effect of increasing phytase coefficient of variation (CV) in chick diets, and to determine the effect of phytase addition on nutrient availability in diets for swine and poultry. The first experiment (EXP) simulated varying mix uniformity of phytase by alternately providing two diets with two different concentrations of microbial phytase (FTU). Increasing phytase CV had little effect on growth performance, whereas bone ash and breaking strength and Ca and P retention and excretion decreased only at the most extreme CV. These data suggest that a phytase CV of between 34 and …
Tetraarylboronic Acid Resorcinarenes: Synthesis, Molecular Recognition, And Templates For The Construction Of Three-Dimensional Electronic Organic Materials., Patrick Tyrone Lewis
Tetraarylboronic Acid Resorcinarenes: Synthesis, Molecular Recognition, And Templates For The Construction Of Three-Dimensional Electronic Organic Materials., Patrick Tyrone Lewis
LSU Historical Dissertations and Theses
The resorcinarenes are remarkable cyclic aromatic tetramers whose impressive impact in the disciplines of molecular recognition, materials science and supramolecular chemistry has been the subject of extensive study and recent review. The potential utility of these materials as chemosensors, catalysts, energy storage and drug delivery agents has been studied or proposed. Research involving resorcinarene molecular containers (careceplexes, carecerands, hemicarcerands) has resulted in landmark achievements including the stabilization of encapusulated cyclobutadiene and benzyne. Functionalization of the resorcinarene lower rim has begun to attract attention as a means to enhance the properties of the parent macrocycles. There has been only one report …
Crystal Structures Of Various Organic Materials And A Statistical Analysis Of Single Crystal X -Ray Diffraction Data From Potassium -Doped Barium Plumbate., Jerome Gerard May
Crystal Structures Of Various Organic Materials And A Statistical Analysis Of Single Crystal X -Ray Diffraction Data From Potassium -Doped Barium Plumbate., Jerome Gerard May
LSU Historical Dissertations and Theses
A general explanation of the collection and reduction of crystallographic data is presented. This is followed by a brief explanation of routine crystal structure solution and refinement. The results of five routine organic structure solutions are included. A discussion of the perovskite structure aristotype is followed by an elaboration of four common distortions to the aristotype that result in perovskite hettotypes. A crystal structure for barium bismuthate is analyzed to explain its occurrence as a perovskite aristotype. A literature review of powder and neutron diffraction structures reported for barium plumbate included a wide variety of perovskite hettotypes and one aristotype. …
Hydrodynamics, Bottom Boundary Layer Processes And Sediment Transport On The South-Central Louisiana Inner Shelf: The Influence Of Extratropical Storms And Bathymetric Modification., David Alton Pepper
LSU Historical Dissertations and Theses
The south-central Louisiana inner shelf has several distinctive characteristics that are not well accounted for by common hydrodynamic and sediment transport models, including a high-frequency wave regime, low fair-weather hydrodynamic energy levels, a coastal orientation parallel to most storm approaches, and a prominent submerged sand body (Ship Shoal). To address these unique considerations, inner-shelf processes were studied using three instrumentation systems deployed on the seaward and landward sides of the shoal between November, 1998 and January, 1999. These instruments were designed to measure hydrodynamic characteristics, suspended sediment concentration, and bed level, which were used to calculate bottom boundary layer parameters …
Effects Of A Low -Protein Diet Supplemented With Coated And Uncoated Methionine On Methionine Metabolism In The Tilapia Oreochromis Niloticus., Manuel Alberto Segovia-Quintero
Effects Of A Low -Protein Diet Supplemented With Coated And Uncoated Methionine On Methionine Metabolism In The Tilapia Oreochromis Niloticus., Manuel Alberto Segovia-Quintero
LSU Historical Dissertations and Theses
Crude protein is the most expensive macronutrient, the use of plant proteins and crystalline amino acid supplementation is the next logical step to increase nutritional value of plant-based diets. The goal of this experiment was to determine the effect of coated and uncoated crystalline methionine on growth, body composition, and methionine uptake in Nile tilapia Oreochromis niloticus fed methionine supplements. Two experiments were designed for this purpose: one to study the effect of supplementation on weight gain and body composition, and a second to determine the effect of coating on absorption efficiency and utilization of crystalline methionine. Five isonitrogenous (26% …
Evaluating Alternative Instructional Strategies To Improve Sixth Graders' Reading Comprehension., Emma Mccall Schorzman
Evaluating Alternative Instructional Strategies To Improve Sixth Graders' Reading Comprehension., Emma Mccall Schorzman
LSU Historical Dissertations and Theses
Although little empirical evidence supporting various instructional strategies for teaching reading comprehension exists, many educators utilize particular strategies assuming their effectiveness. Because difficulties with comprehension are intensified as students reach the intermediate grades, it is necessary that middle school educators instruct using strategies empirically supported through research. This mixed-method study examined the effectiveness of the Directed Reading-Thinking Activity (Stauffer, 1969), the PreP technique (Langer, 1981), and graphic organizers (Barron, 1969), three popular strategies among middle school teachers. Six teachers participated in the two-group design, pretest/posttest study; over a seven-week period, three of the teachers instructed their sixth-grade students using lessons …
An Inquiry Into The Impact Of The Regrow Reading /Writing Strategy On Comprehension In A Community College Setting., Angel Michele Royal
An Inquiry Into The Impact Of The Regrow Reading /Writing Strategy On Comprehension In A Community College Setting., Angel Michele Royal
LSU Historical Dissertations and Theses
The purpose of this study was to examine the impact of the REGROW reading/writing strategy on the comprehension of community college students enrolled in a Developmental English course. The study looked specifically at (a) reading and writing as processes, (b) traditional reading comprehension strategies, (c) traditional direct writing instruction, and (d) the impact of the REGROW reading/writing strategy on comprehension. The focus of this study was to conduct six mini-case studies on students classified as below average, average, and above average, and to track their actions when exposed to direct writing instruction and the REGROW reading/writing strategy. By providing in-depth …
Non -Intrusive Characterization Of A Dispersed, Bubbly, Axisymmetric Jet., Kevin Nathaniel Stanley
Non -Intrusive Characterization Of A Dispersed, Bubbly, Axisymmetric Jet., Kevin Nathaniel Stanley
LSU Historical Dissertations and Theses
This study investigated the effects of bubble size and phase distribution on the liquid and bubble flow fields in a dispersed, bubbly axisymmetric jet. Of primary interest was the interaction of the bubbles with large-scale structures in the developing region of the jet. Measurements were made non-intrusively via Laser Doppler Velocimetry (LDV), Phase-Doppler Analysis (PDA) and video imaging techniques. Liquid Reynolds' numbers were varied from approximately 6,000 to 18,000 while gas volume fraction ranged from 0 to 3%. Bubble sizes varied from approximately 600 mum to 1500 mum. Axial mean velocities and RMS fluctuations have been reported for the liquid …
Structure Determination Of Derivatized Disaccharides By Tandem Mass Spectrometry And Molecular Modeling., Sanford Louis Mendonca
Structure Determination Of Derivatized Disaccharides By Tandem Mass Spectrometry And Molecular Modeling., Sanford Louis Mendonca
LSU Historical Dissertations and Theses
This research entails the synthesis of derivatized disaccharides, mass spectrometry studies for structural elucidation of the synthetic disaccharides and molecular modeling of the native and derivatized disaccharides. Peralkylated (methyl to pentyl), peresterifed and tert-butyl-dimethyl silylated linkage isomeric glucose-glucose disaccharides were synthesized to eventually be used in mass spectrometry studies. In this dissertation, mass spectrometry was used to examine anomeric pair discrimination of two sets of peralkylated (methyl to pentyl) disaccharides (maltose/cellobiose and isomaltose/gentiobiose). This was carried out by electrospray ionization and collision experiments on a triple quadrupole mass spectrometer. In addition, effects of alkyl substitution on cleavage of the glycosidic …
Structure, Expression And Promoter Activity Of Ubiquitin Genes From Rice (Oryza Sativa L.)., Jianlin Wang
Structure, Expression And Promoter Activity Of Ubiquitin Genes From Rice (Oryza Sativa L.)., Jianlin Wang
LSU Historical Dissertations and Theses
Successful transgenic plant production is largely dependent on the use of suitable promoters. In this study, we described isolation of rice ubiquitin genes, and demonstrated the potential utility of the rice ubiquitin promoters in plant transformation systems. Two polyubiquitin genes (RUBQ1 and RUBQ2) and two ubiquitin extension/fusion genes (RUBQ3 and RUBQ4) have been isolated from a rice genomic BAC library. DNA sequence data revealed that both RUBQ1 and RUBQ2 contained an open reading frame encoding a hexameric precursor ubiquitin and an intron immediate upstream of the initiation codon. The two ubiquitin fusion/extension genes RUBQ3 and RUBQ4 contained one repeat of …
Locally Owned And Operated: Opposition To Chain Stores, 1925--1940., Cory Lewis Sparks
Locally Owned And Operated: Opposition To Chain Stores, 1925--1940., Cory Lewis Sparks
LSU Historical Dissertations and Theses
During the 1920s, chain stores exploded in numbers throughout the country. Chains claimed to provide mass distribution for a mass production age. According to their executives, traditional retailing raised the cost of living and interfered with prosperity. Small retailers countered these claims by arguing that corporate retailing endangered prosperity because it concentrated ownership in the hands of a few and stripped wealth from the local community. In 1929 and 1930, anti-chain radio broadcasts sparked popular interest in the chains. Critics accused the chains of using their financial might to sell products below cost and drive competitors out of business. They …
Efficient Iterative Synthesis Of Oligophenylene Rods And Methodology Studies Involving Aryldiazonium Tetrafluoroborate Salts And Arylboronic Esters., Douglas Macarthur Willis
Efficient Iterative Synthesis Of Oligophenylene Rods And Methodology Studies Involving Aryldiazonium Tetrafluoroborate Salts And Arylboronic Esters., Douglas Macarthur Willis
LSU Historical Dissertations and Theses
Suzuki coupling protocols were applied towards the design and subsequent iterative synthesis of oligophenylene rods bearing polar functional groups. These well-defined, polar-functionalized rigid rods were ultimately constructed using an efficient iterative molecular doubling approach without using protecting groups, boronic acid isolations, Grignard or organolithium reactions or preparative chromatographic methods. Currently, these rods are being appended to resorcinarene macrocyclic scaffolds in efforts towards achieving a controlled synthesis of novel, uniform, three-dimensional, electronic directional materials with extended, highly functional lower aromatic cavities. Unique methodology studies involving aryldiazonium tetrafluoroborate salts and arylboronic esters were also contrived and investigated. A novel procedure for the …
An Information Theoretic Approach To Content Based Image Retrieval., John Morris Zachary Jr
An Information Theoretic Approach To Content Based Image Retrieval., John Morris Zachary Jr
LSU Historical Dissertations and Theses
We propose an information theoretic approach to the representation and comparison of color features in digital images to handle various problems in the area of content-based image retrieval. The interpretation of color histograms as joint probability density functions enables the use of a wide range of concepts from information theory to be considered in the extraction of color features from images and the computation of similarity between pairs of images. The entropy of an image is a measure of the randomness of the color distribution in an image. Rather than replacing color histograms as an image representation, we demonstrate that …
A Study Of The Potential Use Of Asphalt Containing Synthetic Polymers For Asphalt Paving Mixes., Pei-Hung Yeh
A Study Of The Potential Use Of Asphalt Containing Synthetic Polymers For Asphalt Paving Mixes., Pei-Hung Yeh
LSU Historical Dissertations and Theses
Chemically modified polymer derivatives of potentially useful polymer modifiers from solid wastes, i.e. polyolefins or EPDM, were prepared by chlorination or maleation to improve asphalt blend compatibility. Chlorination of polyethylene can be controlled to convert crystalline HDPE into semicrystalline polymeric additives. Environmental scanning electron microscopy shows that dispersed CPE rich phase was larger than the HDPE rich phase in asphalt blends. Introducing chlorine atoms on polyethylene chains can improve compatibility of the asphalt-polymer blends through adjusting interaction between the components of asphalt and polymer. The grafting of maleic anhydride to polyolefins or EPDM was carried out either in solution or …
Effects Of Reading Styles On African-American Preschoolers Of Disadvantage., Elizabeth Nowlin Witt
Effects Of Reading Styles On African-American Preschoolers Of Disadvantage., Elizabeth Nowlin Witt
LSU Historical Dissertations and Theses
This study investigated the effects of two styles of storybook reading within the storybook reading event (SBRE) upon African-American preschoolers of disadvantage (AAP-D). One style, performance-oriented, was thought to be closer to cultural frameworks familiar for this population. This style was contrasted with the interactive style familiar to children of middle-class. Each style was utilized with two groups of five children (ten children per condition) across three storybooks, which were each read six times. Pre- and posttesting were used to determine changes in language (semantic and discourse ability, as measured by retelling), literacy, and world knowledge. A control group of …
The Impact Of Implementing Metacognitive Strategies On Instructional And Experiential Scaffolding., Frances Ann Steward
The Impact Of Implementing Metacognitive Strategies On Instructional And Experiential Scaffolding., Frances Ann Steward
LSU Historical Dissertations and Theses
The purpose of the mixed multiple case study was to explore scaffolding at home and school. Strategic instructional procedures, metacognitive strategies use, and homework procedures were examined during reading instruction and home assistance for progress. The participants are as follows: (a) The three principals setting the school's instructional tone; (b) The three reading teachers providing modeling, coaching, and encouragement during lesson presentation and feedback; (c) The six students (two fifth graders in each of the three reading classrooms) depending upon assistance for comprehension task completion; and (d) The six family members assisting with homework. The school sites were selected with …
Oxidation -Reduction Chemistry Of Methane And Nitrous Oxide In Soils And An Approach To Minimize Their Emissions From Irrigated Rice Fields., Kewei Yu
LSU Historical Dissertations and Theses
Rice fields are an important source of the greenhouse gases methane (CH 4) and nitrous oxide (N2O). In this dissertation study, experiments were conducted at three levels---in soil suspensions, in soil cores, and under actual field conditions, to investigate the impact of soil redox potential on CH4 and N2O emissions to the atmosphere. Methane and N2O emissions occurred at distinctively different redox conditions in the homogenous soil suspensions. No significant amounts of CH4 was produced when the soil redox potentials were above -150 mV. In the denitrification process, both N2O production and reduction occurred in the soil redox potential range …
Well Integrity Mechanism, Failure, And Testing In Shallow Marine Sediments., Desheng Zhou
Well Integrity Mechanism, Failure, And Testing In Shallow Marine Sediments., Desheng Zhou
LSU Historical Dissertations and Theses
The leak-off test (LOT) is an in-situ method for testing casing shoe integrity in a well. It is used to evaluate the cement and formation integrity relative to the well plan specifications. The results determine whether any remedial cementing or corrective actions are required and are a basis for planning future wells in the area. Typical analysis of LOTs assumes an elastic wellbore and involves identification of linear trends on the recorded plots. However, LOTs recorded in shallow marine sediments (SMS) are inherently nonlinear and their analysis is a problem. Starting from the analyses of shallow soil properties, LOT plots, …
Seasoned Equity Issuance By Closed -End Funds., William Henry Brigham Jr
Seasoned Equity Issuance By Closed -End Funds., William Henry Brigham Jr
LSU Historical Dissertations and Theses
This dissertation examines in detail the previously unexamined phenomenon of seasoned equity issuance by closed-end funds. Evidence presented here indicates that closed-end funds issue equity at a much higher occurrence rate than is the case for regular, operating firms in the US. Furthermore, these funds overwhelmingly use the rights offer method of equity flotation, which, outside the closed-end universe, has rarely been used in the US in recent years. The evidence produced by this study indicates that, in contrast to industrial firms, the shares of closed-end funds show no significant reaction to announcements of either rights offerings or firm commitment …
Attitudes Of Teachers Of Spanish As A Foreign Language Toward Teaching Spanish To Hispanic Students In Urban Schools., Rossana Ramirez Boyd
Attitudes Of Teachers Of Spanish As A Foreign Language Toward Teaching Spanish To Hispanic Students In Urban Schools., Rossana Ramirez Boyd
LSU Historical Dissertations and Theses
Many Hispanic students do not have opportunities to develop their native language in efforts to adapt to an all English curriculum at the schools they attend. This is particularly evident among high school Hispanic students who usually possess oral fluency in Spanish but lack reading and writing skills in Spanish. The purpose of this research was to explore the attitudes of teachers of Spanish as a foreign language toward teaching Spanish to Hispanic students. This research was guided by four questions, What are the attitudes of teachers of Spanish as a foreign language toward (1) the use of Spanish? (2) …
Cancer Mortality And *Environment In Louisiana: A Geographical Inquiry., Mihye Bark
Cancer Mortality And *Environment In Louisiana: A Geographical Inquiry., Mihye Bark
LSU Historical Dissertations and Theses
Cancer is one of the most serious health problems in the U.S. Louisiana mortality rates for all sites of cancer have exceeded national rates since 1950. Even though concern about the issues of environmental cancer is growing, conclusive results have not been reported. Previous studies differed in data source, data quality, time of observation, and statistical procedure, making comparison of results problematic. The spatial patterns of the most common cancer sites in Louisiana (from 1953 to 1993) and their relationships with environmental factors were investigated, using GIS software and statistical software. To provide a clear understanding of how the spatial …
Solid -State Nmr Of High Spin Nuclei With Large Quadrupolar Coupling Constants., Pamela Louise Bryant
Solid -State Nmr Of High Spin Nuclei With Large Quadrupolar Coupling Constants., Pamela Louise Bryant
LSU Historical Dissertations and Theses
The goal of this study is to develop a method of characterizing the aluminum sites in solid aluminum containing systems that are difficult to determine by normal nuclear magnetic resonance spectroscopy, NMR, or X-ray crystallography. Specifically, the aim is to characterize the aluminum sites in the industrial cocatalyst methylaluminoxane, MAO. The structure of MAO, found in both solid and gel form, has not been well determined. First, an automated 27Al (spin 5/2) single-crystal NMR experiment was used to determine the experimental electric field gradient, EFG, of andalusite, a well-studied mineral with large quadrupolar interactions. The experimental results were compared to …
Agricultural Trade Liberalization And Uneven Development: The Case Of South Korea., Heesun Chung
Agricultural Trade Liberalization And Uneven Development: The Case Of South Korea., Heesun Chung
LSU Historical Dissertations and Theses
The Uruguay Round of the General Agreement on Tariffs and Trade (GATT), which was concluded in 1993, was the principal global forum to discuss agricultural trade in an extensive way. In this last venue of the GATT, South Korean negotiators had to agree to open the nation's agricultural markets so as to assure manufacturing export access to international markets amidst heightening Pressure from surplus agricultural producers A broad range of economic studies have estimated that as an aftermath of the Uruguay Round, a majority of South Korean farmers, who are comparatively disadvantaged due to small-scale, labor-intensive farming, might be displaced. …
Gods, Men And Their Gifts: A Comparison Of The "Iliad", The "Odyssey", The "Aeneid" And "Paradise Lost", Paul Norman Anderson
Gods, Men And Their Gifts: A Comparison Of The "Iliad", The "Odyssey", The "Aeneid" And "Paradise Lost", Paul Norman Anderson
LSU Historical Dissertations and Theses
This dissertation is an examination of the Iliad, the Odyssey, the Aeneid and Paradise Lost based upon their similar depictions of gods and men, specifically in regard to their use of gifts. The procedure is lexical and thematic in approach. The word group around which the majority of the evidence is centered is the noun 'gift' and the verb 'to give.' The nature and use of gifts is examined in the four works under consideration. However, the evidence for the notion of gift-giving is not limited by a strict positivistic approach. Evidence from the texts that clearly includes the notion …
Interaction Between Cognitive Styles And Assessment Approaches., Mehtap Cakan
Interaction Between Cognitive Styles And Assessment Approaches., Mehtap Cakan
LSU Historical Dissertations and Theses
The present study investigated the interaction of cognitive style and assessment format (multiple-choice (MC) and performance-based assessments (PBA)) in second language proficiency. The participants consisted of 258 eighth-grade students. The second language achievement of the students was assessed by the Eighth Grade Proficiency/Credit Exam: French I. The cognitive style of the students was assessed by the Group Embedded Figures Test. The study also examined study habits and attitudes of field-dependent (FD) and field-independent (FI) students toward the two assessment formats. The study utilized a sequential mixed-model design, consisting of both quantitative and qualitative methods. Phase I consisted of a quantitative …
The Influence Of Gender -Related Beliefs On Students Motor Skill Learning., Donald Gregory Scott Belcher
The Influence Of Gender -Related Beliefs On Students Motor Skill Learning., Donald Gregory Scott Belcher
LSU Historical Dissertations and Theses
The purpose of this study was to determine the influence of beliefs about gender appropriateness and conceptions of ability on perceived and actual competence and patterns of behavior during practice of a sex typed masculine task, the hockey wrist shot. Sixty-eight undergraduate females formed four homogeneous treatment conditions based on their beliefs about gender appropriateness and conceptions of ability: Masculine Innate (MI), Masculine Acquired (MA), Neutral Innate (NI), and Neutral Acquired (NA). Four teachers taught across all of the treatment conditions for a total of 16 learning groups. Each of the learning episodes reinforced the gender appropriateness and conception of …
Optimization Of Gas Well Completion And Production Practices., John H. Mcmullan
Optimization Of Gas Well Completion And Production Practices., John H. Mcmullan
LSU Historical Dissertations and Theses
In water drive gas reservoirs, wells can be completed with a long perforated interval and produced at high rates to minimize abandonment pressure and maximize recovery. Alternatively, the perforations can be limited to the top of the productive interval and the well produced at a low rate in an effort to prevent coning which results in high abandonment pressures if the strength of the aquifer is adequate to support reservoir pressure. This study uses a reservoir simulation coning model to evaluate these two conflicting completion and production practices. The impact of completion interval, gas production rate, and reservoir permeability were …
Factors Influencing State And Nation Wetland Management: Building Effective Management Models., Megan Kinley Greiner La Peyre
Factors Influencing State And Nation Wetland Management: Building Effective Management Models., Megan Kinley Greiner La Peyre
LSU Historical Dissertations and Theses
Recognition that the interaction of people and nature is implicit in every environmental problem has increased over the last century. Yet, solutions to environmental problems are impeded by uncertainty concerning the importance of socioeconomic and political conditions in dealing with environmental issues. The development of interdisciplinary management models is necessary in order to address both the biological and social causes of environmental degradation. Protection of wetland systems varies among both nations and US. states. This variation provides a unique opportunity to explore the hypothesis that socioeconomic, political and environmental variables are critical influences on wetland protection. Structural equation modeling and …