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LSU Historical Dissertations and Theses

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Towards Bimetallic Asymmetric Hydroformylation Catalysis: Separation Of The Diastereomers And Enantiomers Of A Binucleating Tetraphosphine Ligand., Pia Rosario Alburquerque Jan 1997

Towards Bimetallic Asymmetric Hydroformylation Catalysis: Separation Of The Diastereomers And Enantiomers Of A Binucleating Tetraphosphine Ligand., Pia Rosario Alburquerque

LSU Historical Dissertations and Theses

The separation of the racemic and meso diastereomers of the binucleating ligand et,ph-P4 ((Et$\rm \sb2PCH\sb2CH\sb2)(Ph)PCH\sb2P(Ph)(CH\sb2CH\sb2PEt\sb2))$ was achieved. The thiocyanate nickel(II) complexes of mixed racemic- and meso-et,ph-P4 were separated based on their different solubilities in ethanol. Cyanolysis of the separated racemic and meso nickel(II) complexes allowed the recovery of the free racemic- and meso-et,ph-P4 ligands. The many species involved in this process were identified in order to obtain consistent and improved results. After the separation of the diastereomers, the enantiomers of racemic-et,ph-P4 were separated in order to study the ability of the bimetallic chiral rhodium et,ph-P4 complexes to act as precursors …

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Causes Of Vegetation Dieback And Subsequent Wetland Loss In Two Louisiana Coastal Marshes., Eric Courtney Webb Jan 1997

Causes Of Vegetation Dieback And Subsequent Wetland Loss In Two Louisiana Coastal Marshes., Eric Courtney Webb

LSU Historical Dissertations and Theses

Vegetation dieback is an important component of the wetland loss process in coastal Louisiana. To determine the factors causing vegetation dieback in a Louisiana salt marsh and oligohaline marsh, field monitoring and manipulative field experiments were conducted in both marsh types. In the salt marsh, a three-year field study was conducted in which biotic and edaphic characteristics were measured and the effect of elevation on four salt marsh plant species was tested in a manipulative field experiment. In the oligohaline marsh, a two-year field study was conducted which evaluated the relationship between biotic and edaphic characteristics. Additionally, the effects of …

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Caprine Sperm Cells As Vectors For Gene Transfer., Yongxin Sun Jan 1997

Caprine Sperm Cells As Vectors For Gene Transfer., Yongxin Sun

LSU Historical Dissertations and Theses

Goat sperm cells were used as a model to evaluate sperm-mediated gene transfer. Fresh and frozen-thawed goat sperm cells were co-incubated with radio-labelled foreign DNA. After 10 extensive washings, the compacted sperm retained foreign DNA. Confocal microscopy confirmed that the position on the sperm cell responsible for binding of foreign DNA was located in both the anterior and the posterior heads of caprine sperm cells. Furthermore, confocal longitudinal sections of the sperm cells showed that foreign DNA had penetrated into goat sperm nuclei. In this study, 37% of the fresh goat sperm and 33% of the frozen-thawed goat sperm cells …

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Acid Solubilization Of Fish Protein For Production Of Protein Hydrolysate., Ercument Ozer Jan 1997

Acid Solubilization Of Fish Protein For Production Of Protein Hydrolysate., Ercument Ozer

LSU Historical Dissertations and Theses

The mechanism of fish protein solubilization by acid hydrolysis at elevated temperatures was investigated. Rate expressions for the solubilization were determined using pilot scale data with two different rate determination methods. A postulated mechanism was verified and estimated rates were evaluated on five independent verification experiments. A functional relationship between nonprotein byproduct concentration and whiteness of fish protein hydrolysate (FPH) was developed. Initial and set-point operating variables were calculated to produce FPH with acceptable color characteristics for food use. A batch reactor was used for duplicate hydrolysis trials conducted at three acid and three temperature levels for four hours. Samples …

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The Florida Chautauqua As Text: Creating And Satisfying A Disposition To Appropriate Cultural Goods In Northwest Florida., Matthew Albert Beemer Jan 1997

The Florida Chautauqua As Text: Creating And Satisfying A Disposition To Appropriate Cultural Goods In Northwest Florida., Matthew Albert Beemer

LSU Historical Dissertations and Theses

The purpose of this dissertation is to demonstrate that the Florida Chautauqua in De Funiak Springs, Florida, was primarily a commercial venture which pretended to a goal of offering cultural, educational, and religious products. In the Chautauqua's early years, it succeeded because it could exploit the economic and cultural situation. The Assembly tried to create a market for "culture" by developing cultural competencies in potential consumers so that those consumers would "buy" what the Chautauqua could sell. As the situation changed, the Florida Chautauqua, though it tried, could not adapt enough to be viable. To support the argument, I describe …

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Personal And Organizational Structure Correlates Of Receptivity And Resistance To Change And Effectiveness In Institutions Of Higher Education., James Sutherland Clarke Jan 1997

Personal And Organizational Structure Correlates Of Receptivity And Resistance To Change And Effectiveness In Institutions Of Higher Education., James Sutherland Clarke

LSU Historical Dissertations and Theses

The purpose of this exploratory study was three-fold. First, a conceptual framework was developed to link innovation and organizational effectiveness in higher education settings through the mediating variables of faculty decision-making deprivation, self-efficacy, organizational efficacy, receptivity to change and resistance to change. Second, original instrumentation was developed to measure faculty receptivity and resistance to change and academic unit head perspectives of their unit's effectiveness. Third, linkages between the variables were examined through the collection and analysis of data using structure equation modeling and appropriate variable comparisons. The sample consisted of all faculty from five traditional academic units at all 59 …

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Late Quaternary Foraminifera From Lower Bathyal And Abyssal Sediments, Gulf Of Mexico: A Record Of Paleoceanographic Change., Megan H. Jones Jan 1997

Late Quaternary Foraminifera From Lower Bathyal And Abyssal Sediments, Gulf Of Mexico: A Record Of Paleoceanographic Change., Megan H. Jones

LSU Historical Dissertations and Theses

Striking late Quaternary surface- and deep-water oceanographic changes and a link to North Atlantic thermohaline circulation are identified by analyses of high-resolution, benthic and planktic foraminiferal census data from the lower bathyal and abyssal Gulf of Mexico (GOM). The recognized environmental, watermass, preservation, and productivity signals reveal a detailed paleoenvironmental and paleoceanographic history. A paleoceanographic model developed for surface and deep waters of the abyssal Gulf describes a four-stage sequence of oceanographic changes from the Last Glacial Maximum (LGM) to the present. Compared to present-day surface waters, those of LGM were nutrient-enriched and had reduced productivity. The influx of glacial …

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Negotiating Literacy Instruction: Pedagogical Perceptions Of Secondary Preservice Teachers., Julie Hill Lester Jan 1997

Negotiating Literacy Instruction: Pedagogical Perceptions Of Secondary Preservice Teachers., Julie Hill Lester

LSU Historical Dissertations and Theses

Secondary teachers face the challenge of planning instructional activities that combine their own subject knowledge with information from textbooks and other forms of text to help students learn content material. This study explores preservice teachers' perceptions regarding literacy instruction within the context of teaching and learning content material. The participants are senior secondary education students enrolled in a content area literacy course at a regional university in the southeast. Case studies are constructed for six preservice teachers representing different content areas. Qualitative data collection procedures included a questionnaire, guided journal entries, literacy autobiography, and personal interviews. Cross-case analysis was employed. …

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Ephemeral Hinterlands And The Historical Geography Of Trujillo, Honduras, 1525-1950., Taylor E. Mack Jan 1997

Ephemeral Hinterlands And The Historical Geography Of Trujillo, Honduras, 1525-1950., Taylor E. Mack

LSU Historical Dissertations and Theses

The historical geography of Trujillo, Honduras is told through its changing hinterlands. This dissertation uses world systems to approach and understand the historical geography of Trujillo, however, the focus is on this peripheral area of the world system, rather than on the core. The coast of the western Caribbean experiences economic boom and bust cycles. The periodization of Trujillo's historical geography is based on the city's boom and bust periods, using primary documents from archives in Central America and Spain. Trujillo's first boom period lasted from its founding in 1525 until 1550, based on gold exports from the interior. During …

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Feasibility Study On The Reduction Of Hydrostatic Pressure In A Deep-Water Riser Using A Gas-Lift Method., Clovis Antonio Lopes Jan 1997

Feasibility Study On The Reduction Of Hydrostatic Pressure In A Deep-Water Riser Using A Gas-Lift Method., Clovis Antonio Lopes

LSU Historical Dissertations and Theses

Recent successful exploration efforts in deep waters have heightened interest in developing oil and gas reservoirs on the continental slope. Leases have been obtained in water depths up to 10,000 ft with a requirement that they be drilled within the next decade. Use of current techniques to drill these leases will require extremely large floating drilling units and large diameter marine riser systems. This study presents the results of a feasibility study on the use of an automated gas-lift system for a marine riser that will maintain the hydrostatic pressure in the subsea well-head equal to that of the sea …

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Preparation Of Strained Nitrogen Heterocycles For Spin Trapping Applications., Anna Patrice Shanklin Jan 1997

Preparation Of Strained Nitrogen Heterocycles For Spin Trapping Applications., Anna Patrice Shanklin

LSU Historical Dissertations and Theses

This work discusses the synthesis of bicyclic nitrogen heteorocycles with the emphasis placed on the design and evaluation of a bicyclic nitrone for spin trapping applications. Camphorolactams, 1,7,7-trimethyl-2-aza-bicyclo(2.2.1) heptan-3-one and 1,7,7-trimethyl-3-azabicyclo (2.2.1) heptan-2-one were prepared from camphoric anhydride under Curtius conditions with sodium azide and dimethylformamide. 2-azabicyclo(2.2.1) heptan-3-one was also prepared under Curtius conditions from cis-1,3-cyclopentane-dicarboxylic acid anhydride. N-benzyl-2-azabicyclo (2.2.1) -heptane and N-benzyl-2-azabicyclo (2.2.2) octane were prepared from their aliphatic amine derivatives under Hofmann-Loeffler conditions in low yields. 1,3,3-trimethyl-6-azabicyclo (3.2.1) octane, N-oxide was prepared from its parent amine under sodium tungstate catalyzed oxidation with hydrogen peroxide. The bicyclic nitrone was …

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Factors Affecting Motivation To Use Computer-Based Training., Dian Lampkin Seyler Jan 1997

Factors Affecting Motivation To Use Computer-Based Training., Dian Lampkin Seyler

LSU Historical Dissertations and Theses

Billions of dollars are spent each year on training in an effort to increase productivity so businesses can stay competitive. However, little is known about factors that impact the trainee's decisions to use what they learned in these training programs, back on the job. Guided by a conceptual model of training evaluation and research, this research examined the influence of five sets of variables on training participant's motivation to use what they learned during a computer-based training (CBT) program in a large petro-chemical plant in southern Louisiana. The variables included in this study were: individual and general attitudes (love of …

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The Prism Of Laughter: Antebellum Humorists In Regional Perspective., Henry O. Robertson Jr Jan 1997

The Prism Of Laughter: Antebellum Humorists In Regional Perspective., Henry O. Robertson Jr

LSU Historical Dissertations and Theses

This work revises earlier interpretations of antebellum American humorists and sets forth a new model for understanding their accomplishments. Rooted in historical thinking, this study integrated biography, publishing history, critical responses, and a penetrating analysis of the sketches of several major figures. The first third examined Seba Smith, Joseph C. Neal, and Augustus Baldwin Longstreet. A devotion to their communities in Maine, Philadelphia, and Georgia, respectively, and preference for writing warm, genial selections remained important shared influences while cultural differences between the societies in which each matured and wrote made their humor diverge significantly. In both content and expression their …

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Tectonics And Sedimentation: The Evolution, Tectonic Influences And Correlation Of The Tanqua And Laingsburg Subbasins, Southwest Karoo Basin, South Africa., Erik Douglas Scott Jan 1997

Tectonics And Sedimentation: The Evolution, Tectonic Influences And Correlation Of The Tanqua And Laingsburg Subbasins, Southwest Karoo Basin, South Africa., Erik Douglas Scott

LSU Historical Dissertations and Theses

The Tanqua and Laingsburg subbasins developed in the southwest corner of the Karoo Basin, South Africa, during the late Permian. The subbasins had near-contemporaneous formation and filling, and each contain a number of submarine fans. Five submarine fan systems in the broad, shallow Tanqua have a lateral continuity of up to 34km. With a sandstone/shale ratio of 75-90%, the arenaceous fans vary in thickness from 20 to 60m. Intervening shales range from 20 to 75m. Four fan systems in the more typical foredeep style Laingsburg subbasin are thicker and a few hundred kilometers long. The history of both subbasins was …

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The Effects Of Homogenized Cream And Commercial Buttermilk Powder On Low-Fat Cheddar Cheese., Tonya Conner Schoenfuss Jan 1997

The Effects Of Homogenized Cream And Commercial Buttermilk Powder On Low-Fat Cheddar Cheese., Tonya Conner Schoenfuss

LSU Historical Dissertations and Theses

Seventy percent reduced fat Cheddar cheese was manufactured with homogenized cream and sweet cream buttermilk powder in an effort to improve flavor and texture characteristics. Manufacturing procedures, as well as the chemical, physical and sensory attributes. Pasteurized cream was homogenized (15.8 MPa) with and without the addition of buttermilk powder. The cream was added to pasteurized skim milk to produce two vats of cheese, one with and one without buttermilk powder. After milling, each vat was split to produce a washed curd and normal curd cheese. The four cheeses were sampled at week one, and months one, two and four. …

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Two Essays On Intraday Information Processing Of Stock Index Derivatives., Raymond Waiman So Jan 1997

Two Essays On Intraday Information Processing Of Stock Index Derivatives., Raymond Waiman So

LSU Historical Dissertations and Theses

The purpose of this dissertation is to examine two issues in intraday information processing among the spot index and index futures and index options. The first issue is price discovery. The second one is volatility spillover, especially the asymmetric effects of innovations in one market on the volatility of other markets. In this dissertation, data on the German stock and index derivative markets are employed. The choice of Germany is primarily due to data availability. Therefore, the German data employed here are mainly for illustrative purposes and this study is not country specific. The choice of German data is also …

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Relative Rates Of Molecular Evolution In Rodents And Their Symbionts., Theresa Ann Spradling Jan 1997

Relative Rates Of Molecular Evolution In Rodents And Their Symbionts., Theresa Ann Spradling

LSU Historical Dissertations and Theses

The focus of this dissertation is the relative tempo of molecular evolution among organisms of varying levels of relatedness. Because this is a rapidly expanding area of research, Chapter 1 is devoted to a review of the current state of knowledge on rates of molecular evolution. In Chapter 2, I present an analysis of relative rates of evolution among several distantly related rodents. The heterogeneity in rate of evolution of the cytochrome b gene observed here cannot be explained by metabolic rate, body size, generation time, or nucleotide-generation time. Likewise, there is no evidence that these differences in rate of …

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An Examination Of Two Contemporary Techniques In Five Works For Solo Bassoon: Descriptions And Performance Suggestions., Steve Vacchi Jan 1997

An Examination Of Two Contemporary Techniques In Five Works For Solo Bassoon: Descriptions And Performance Suggestions., Steve Vacchi

LSU Historical Dissertations and Theses

Much of the literature for solo bassoon of the past few decades is partially dependent upon the player's ability to use contemporary techniques. While it is atypical for an entire composition to rely on such devices, a significant volume of recent solo literature may be unplayable to those who have not mastered them. My aim is to help solo bassoonists in perfecting two specific contemporary techniques: fluttertongue and singing while playing. Though quite standard for other woodwind instruments such as the flute, these techniques have not been adequately described for bassoonists. The repertoire chosen for this project represents works for …

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Syntheses, Separations, And Applications Of Water-Soluble Chiral Calixarenes., Yuling Zhang Jan 1997

Syntheses, Separations, And Applications Of Water-Soluble Chiral Calixarenes., Yuling Zhang

LSU Historical Dissertations and Theses

This dissertation focuses on the study of water-soluble calixarene derivatives as receptors for fluorescence probes and as chiral selectors. The synthesis of sulfonated calixarenes was first pursued and a method for the separation of sulfonated calixarenes (4), (6), (8) and the 4-hydroxylbenzene sulfonate monomer by capillary zone electrophoresis with direct UV absorbance detection is described. Fluorescence and absorption studies of water-soluble sulfonated calix(6)arene (SCX6) are reported. A red shift in the absorption spectrum and a change in the fluorescence spectrum of the calixarenes are observed upon an increase in pH from 2.0 to 13.0. The spectroscopic changes are attributed to …

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A Theory Of Cortical Neural Processing., David Timothy Young Jan 1997

A Theory Of Cortical Neural Processing., David Timothy Young

LSU Historical Dissertations and Theses

This dissertation puts forth an original theory of cortical neural processing that is unique in its view of the interplay of chaotic and stable oscillatory neurodynamics and is meant to stimulate new ideas in artificial neural network modeling. Our theory is the first to suggest two new purposes for chaotic neurodynamics: (i) as a natural means of representing the uncertainty in the outcome of performed tasks, such as memory retrieval or classification, and (ii) as an automatic way of producing an economic representation of distributed information. We developed new models, to better understand how the cerebral cortex processes information, which …

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Indigenous Lands In A Developing Region: A Historical Ethnogeography Of The Pech Indians Of Eastern Honduras, With Emphasis On Recent Settlement And Land Use Changes., James Richard Samson Jan 1997

Indigenous Lands In A Developing Region: A Historical Ethnogeography Of The Pech Indians Of Eastern Honduras, With Emphasis On Recent Settlement And Land Use Changes., James Richard Samson

LSU Historical Dissertations and Theses

Since before Spanish Contact, the Pech Indians have occupied a large portion of northeastern Honduras. Like other native American populations, they have suffered significant territorial reductions and cultural alterations at the hands of European colonists and modern ladino immigrants. Utilizing the methodologies of cultural geography, ethnohistory, and ethnogeography, the Pech, formerly known as the Paya, are scrutinized to illustrate the process by which indigenous peoples are reduced and incorporated into a developing national setting. Part One examines the scholarly record on the ethnohistory of the Pech and their neighbors to delimit their habitats and to document Pech incorporation into the …

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Cloning And Expression Of Capsid Proteins Of Hepatitis A Virus In Escherichia Coli., Lingaiah Chandrashekar Jan 1997

Cloning And Expression Of Capsid Proteins Of Hepatitis A Virus In Escherichia Coli., Lingaiah Chandrashekar

LSU Historical Dissertations and Theses

Hepatitis A virus (HAV), the causative agent of food and water borne acute hepatitis worldwide, is very difficult and expensive to propagate in tissue culture. Large scale production of HAV proteins in E. coli by recombinant DNA techniques would be invaluable for antisera production, biochemical analyses and in developing sensitive diagnostic tests. Therefore, PCR amplified DNA fragments encoding the HAV capsid proteins were cloned individually into prokaryotic expression vectors for production of either recombinant fusion or non-fusion proteins. Cloning and expression of HAV capsid genes, which induced toxic effects in certain host E. coli, was tolerated better by protease-deficient host …

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The Synthesis Of Novel Phosphine-Modified Ligands For Use In Bimetallic Hydroformylation., Howard Frederick Koch Iii Jan 1997

The Synthesis Of Novel Phosphine-Modified Ligands For Use In Bimetallic Hydroformylation., Howard Frederick Koch Iii

LSU Historical Dissertations and Theses

The tetraphosphine ligand, Et$\sb2$P(CH$\sb2)\sb2$P(Ph)CH$\sb2$P(Ph)(CH$\sb2)\sb2$PEt$\sb2 ,$ et,ph-P4, was designed to be a binucleating ligand for use in bimetallic hydroformylation catalysis. This ligand can be tailored for both electronic and steric factors at the internal and external phosphorus atoms. It is hoped that through careful tuning of this ligand, the rate and selectivity of our bimetallic catalyst can be optimized for various substrates. Modification of the original ligand may also lead us to a better understanding of the mechanism involved in the catalytic cycle. My goal has been to replace the phenyl substituents on the internal phosphorus atoms with various alkyl groups. …

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Stochastic Techniques For The Solution Of Electrostatic Problems With Applications To Electron Optics., Elias Kougianos Jan 1997

Stochastic Techniques For The Solution Of Electrostatic Problems With Applications To Electron Optics., Elias Kougianos

LSU Historical Dissertations and Theses

We apply stochastic techniques towards the solution of the two-dimensional Laplace's equation in boundary value problems encountered in the calculation of electrostatic potentials in electron lenses and deflectors. The justification of these techniques arises from an astonishingly simple but far-reaching principle, which has been known for a long time but has been rarely used: the potential at any point in the interior of a charge-free region can be calculated by performing random walks starting at this point and terminating at the boundary of the region--the potential is then the average of the potential boundary values (assumed known) over the random …

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Amino Acid Requirements And Crystalline Amino Acids For Finishing Pigs., Theresia Alice Knowles Jan 1997

Amino Acid Requirements And Crystalline Amino Acids For Finishing Pigs., Theresia Alice Knowles

LSU Historical Dissertations and Theses

This research was conducted to obtain a better understanding of the amino acid needs of finishing pigs. Twelve experiments were conducted using the urea nitrogen method to determine the lysine requirement of gilts and barrows. Two experiments were conducted to determine the optimum ratio of total sulfur amino acids to lysine for finishing pigs (74 to 111 kg); and three experiments were conducted to evaluate the net energy content of low crude protein, crystalline amino acid supplemented diets for finishing pigs (70 to 117 kg). The lysine requirement of gilts, as determined by the urea nitrogen method, decreased as body …

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The Preparation And Production Of Rapid Sequential Aiming Movements In Motor Control., Dongwon Yook Jan 1997

The Preparation And Production Of Rapid Sequential Aiming Movements In Motor Control., Dongwon Yook

LSU Historical Dissertations and Theses

Three experiments are reported that attempt to further our knowledge of the preparation and production of rapid sequential aiming movements. Specifically, these experiments examined possible reasons why in sequential aiming responses, the second movement segment (MT2) is consistently performed more slowly than first and third movement segments (MT1 and MT3). In the first experiment, participants struck 1, 2, or 3 targets in sequence without the benefit of visual feedback and without time stress to determine if MT2 is slowed due to a visually based on-line trajectory-correction process. The results showed that MT2 was not slower than MT1 under these condition. …

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The Impact Of Technological Change On The Economic Viability Of Individual Production Centers: The Case Of The 1840-1880 British Ocean-Going Iron And Steam Shipbuilding Industry., Daniel Stephen Allen Jan 1997

The Impact Of Technological Change On The Economic Viability Of Individual Production Centers: The Case Of The 1840-1880 British Ocean-Going Iron And Steam Shipbuilding Industry., Daniel Stephen Allen

LSU Historical Dissertations and Theses

This dissertation examines the relationship between technological change and spatial industrial restructuring through a case study of the 1840-1880 British ocean-going iron and steam shipbuilding industry. The study tests the hypothesis that a shipbuilding center's share of the national British shipbuilding market was associated with its ability to generate or rapidly adopt technological change. The study begins by establishing iron steamship technological changes introduced by British shipbuilders and the industry's attendant spatial restructuring It then develops two site-specific variables: industrial viability and innovative ability. Data for both variables are obtained from the Lloyds Register of British and Foreign Shipping. The …

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A Double-Hurdle Expenditure Analysis Of Nonconsumptive Wildlife-Related Recreation., Yeong-Nain Chi Jan 1997

A Double-Hurdle Expenditure Analysis Of Nonconsumptive Wildlife-Related Recreation., Yeong-Nain Chi

LSU Historical Dissertations and Theses

This study utilized cross-sectional data obtained from the 1991 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation to analyze the expenditures and consumption of nonconsumptive wildlife related recreation in the Lower Mississippi Valley Ecosystem area. In the process of selecting an appropriate model most consistent with individuals' consumption behavior associated with nonconsumptive wildlife related recreation, the tobit model and the double-hurdle model for both the primary nonresidential and residential expenditure models were evaluated. Based on the Lagrange multiplier test and the likelihood ratio test results, the double-hurdle model fit the data much better than the tobit model. The hypothesis that …

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Characterization Of The Cytochromes P450-Dependent Hepatic Microsomal Monooxygenase System Of The American Alligator, Alligator Mississippiensis: Influence Of Xenobiotic Chemicals., Robin Parsons Ertl Jan 1997

Characterization Of The Cytochromes P450-Dependent Hepatic Microsomal Monooxygenase System Of The American Alligator, Alligator Mississippiensis: Influence Of Xenobiotic Chemicals., Robin Parsons Ertl

LSU Historical Dissertations and Theses

Alligator mississippiensis contains all of the components of the hepatic microsomal mixed function oxidase system. In general, basal and induced levels of P450 specific content, immunochemically detected abundance and examined activities are less than in mammals. In alligator at least two classes of P450s are inducible by xenobiotics: those induced by 3-methylcholanthrene (3MC) and those induced by phenobarbital (PB). PB and 3MC induce multiple P450 isoforms as detected by western blot and enzymatic analyses. The induced level of alkoxyphenoxazone O-dealkylation (AROD) was 10- to 100-fold lower in alligator than in rat, with the exception of phenylbenzyloxyphenoxazone O-dealkylation. In contrast to …

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A Study Of The Effect Of Energetic Flux Bombardment On Intensified Plasma-Assisted Processing., Albert Amatey Adjaottor Jan 1997

A Study Of The Effect Of Energetic Flux Bombardment On Intensified Plasma-Assisted Processing., Albert Amatey Adjaottor

LSU Historical Dissertations and Theses

An investigation of the plasma nitriding mechanism under intensified conditions (average particle energy up to 1200 eV) was carried out using a triode configuration. The significance of the different physical processes taking place during intensified plasma nitriding, such as sputtering, implantation, defect generation, redeposition and diffusion were investigated experimentally, while theoretical predictions were obtained by using the TRIM (transport of ions in matter) code. A titanium-base alloy was selected as the substrate material. Sputtering yield in an inert atmosphere was found to exhibit three regimes as a function of incoming particle energy. The low energy and high energy regimes were …

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