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Electrochemical And Spectroscopic Studies Of Boron And Sulfur Species In Nonaqueous Media., Jianzhong Liu Jan 1997

Electrochemical And Spectroscopic Studies Of Boron And Sulfur Species In Nonaqueous Media., Jianzhong Liu

LSU Historical Dissertations and Theses

Room temperature molten salts have been of interest because of their unique properties such as aprotic nature and excellent Lewis acid-base adjustability. They provide a novel medium for fundamental studies and constitute a promising electrolyte for metal plating and secondary batteries. In the present study, the room temperature N-Butyl-pyridinium chloride (BPC)-boron trichloride (BCl$\sb3)$ and mixed BCl$\sb3$-AlCl$\sb3$-BPC melts have been prepared and characterized using reaction stoichiometries, electrochemistry and secondary ion mass spectrometry (SIMS). At normal atmosphere and room temperature, even when excess BCl$\sb3$ was added, BCl$\sb3$-BPC melts have a constant composition of 52:48 mole ratio BCl$\sb3$:BPC. SIMS studies confirmed previous Raman …

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Characterization Of Aminoalkylcarbamoyl Cellulosic And Chitosan Derivatives For Use In Cosmetic Formulation., Melissa Ann Manuszak Guerrini Jan 1997

Characterization Of Aminoalkylcarbamoyl Cellulosic And Chitosan Derivatives For Use In Cosmetic Formulation., Melissa Ann Manuszak Guerrini

LSU Historical Dissertations and Theses

Polymer and surfactant interactions have been a subject of intense research due to industrial applications utilizing a polymer-surfactant system, such as cosmetic formulation. A series of aminoalkylcarbamoyl cellulose derivatives were prepared from the amidation of methylcarboxymethyl cellulose. These derivatives were quaternized with either iodomethane, or hydroxypropyl trimethylammonium chloride, or epichlorohydrin and dimethylamine to yield polyquaternary ammonium salts. The focus of this dissertation is the characterization of a family of these compounds based on N,N$\sp\prime$,-dimethylethylene diamine. As these compounds are similar to Polyquaternium 10, a quaternized hydroxyethyl cellulose derivative, the solution properties have been characterized; antimicrobial activity and keratin affinity have …

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An Identification Of Primary Evaluands As Perceived By Undergraduate Students And Faculty In A College Of Agriculture., Karen Renee Juneau Jan 1997

An Identification Of Primary Evaluands As Perceived By Undergraduate Students And Faculty In A College Of Agriculture., Karen Renee Juneau

LSU Historical Dissertations and Theses

This study determined appropriate evaluands for a College of Agriculture based on the perceptions of two shareholder groups of the college, the faculty and undergraduate students. Student opinions about their college experiences appeared related to the goals and influences that prompted them to attend college. These goals and influences determined what they expected from their college experience. There were three parts to the study; a pilot study, an undergraduate student study and a faculty study. Undergraduate students were classified based on two break points, gender and nontraditional/traditional student status. There were four focus groups conducted for the study and fourteen …

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The Radioresistance Of Deinococcus Radiodurans., Valerie Mattimore Jan 1997

The Radioresistance Of Deinococcus Radiodurans., Valerie Mattimore

LSU Historical Dissertations and Theses

Deinococcus radiodurans is a remarkably ionizing radiation resistant bacterium. As a vegetative cell it is capable of withstanding 5,000 Gy ionizing radiation without evidence of death or mutation. D. radiodurans survives irradiation by repairing DNA damage via an extremely efficient DNA repair system. However, this DNA repair system has not been completely defined. In addition, the selective process allowing the evolution of high level radioresistance has remained a question. This dissertation bolsters the understanding of the DNA repair system of D. radiodurans by characterizing a collection of ionizing radiation sensitive (IRS) mutants. The level of radioresistance is quantified and transformation …

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Analysis Of Maize (Zea Mays Subsp. Mays) Pollen: Normalizing The Effects Of Microscope?Slide Mounting Media On Diameter Determinations, Andrew Sluyter Jan 1997

Analysis Of Maize (Zea Mays Subsp. Mays) Pollen: Normalizing The Effects Of Microscope?Slide Mounting Media On Diameter Determinations, Andrew Sluyter

Faculty Publications

Maize (Zea mays subsp. mays) dominates the record of prehistoric agriculture in the Neotropics. Nonetheless, many significant questions of Zea systematics and evolution persist. Palynology provides a record central to addressing those questions, but determining pollen grain diameter remains a significant method- ological issue: diameter is a key characteristic in identification, and diameter seems to be space-time dependent - the latter phenomenon but little understood. One issue in analyzing diam- eter is the confounding effect of microscope-slide mounting media. This study provides correction factors to normalize diam- eter among silicon oil, glycerine jelly, and acrylic resin (du Pont Elvacite), the …

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Landscape Change And Livestock In Sixteenth-Century New Spain: The Archival Data Base, Andrew Sluyter Jan 1997

Landscape Change And Livestock In Sixteenth-Century New Spain: The Archival Data Base, Andrew Sluyter

Faculty Publications

Despite the wealth of Mexican archival data pertinent to understanding the ecological interaction between livestock and landscape during the sixteenth century in New Spain, some fundamental methodological issues persist in the use of the mercedes, or land grants. The degree of completeness of the extant mercedes record and the de facto areal extents of the cattle and sheep estancias both remain uncertain. A cartographic method applied to mercedes for the central Veracruz lowlands addresses those issues and suggests a general method for rigorous analysis of the data base. That method demonstrates that the extant mercedes provide a nearly complete record …

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Development Of A Protein-Free Chemically Defined Culture Medium For The Propagation Of The Oyster Pathogen Perkinsus Marinus, J. F. La Peyre, M. Faisal Jan 1997

Development Of A Protein-Free Chemically Defined Culture Medium For The Propagation Of The Oyster Pathogen Perkinsus Marinus, J. F. La Peyre, M. Faisal

Faculty Publications

In the present study we describe a protein-free, chemically defined culture medium, designated JL-ODRP-3, which supports the propagation of Perkinsus marinus, a parasite of the eastern oyster, Crassostrea virginica. P. marinus adapted rapidly to the defined medium and the growth rate of the protozoan increased significantly following a few subcultures. Two isolates of P. marinus, one from the Chesapeake Bay (Virginia) and the other from the Gulf of Mexico (Texas) were cultured for at least ten passes. The doubling times for the isolates from Virginia and Texas, in log phase, were 18 ± 1.2 and 28.6 ± 3.2 hours respectively, …

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Attenuation, Persistence, And Vaccine Potential Of An Edwardsiella Ictaluri Pura Mutant, Mark L. Lawrence, Richard K. Cooper, Ronald L. Thune Jan 1997

Attenuation, Persistence, And Vaccine Potential Of An Edwardsiella Ictaluri Pura Mutant, Mark L. Lawrence, Richard K. Cooper, Ronald L. Thune

Faculty Publications

In this study, an adenine-auxotrophic strain of Edwardsiella ictaluri was constructed and its virulence, tissue persistence, and vaccine efficacy were evaluated. A clone containing the purA gene was isolated from an E. ictaluri genomic library, sequenced, and shown to have an overall sequence identity of 79.3% at the nucleotide level and 85.7% at the amino acid level with the Escherichia coli purA gene. The cloned E. ictaluri purA gene was mutated by deleting a 598-bp segment of the gene and inserting the kanamycin resistance gene from TraP03 into the gap. The ApurA::Km(r) gene was subcloned into the suicide plasmid pGP704, …

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Sugar Cane Fiber Geotextiles., Julia L. Thames Jan 1997

Sugar Cane Fiber Geotextiles., Julia L. Thames

LSU Historical Dissertations and Theses

The study of sugar cane fiber geotextiles represents a holistic approach to interdisciplinary research that includes product development, product testing, industry and target market identification, and strategic and financial planning for manufacturing and distribution. Based upon satisfactory results of prior research, a field test of soil erosion control in a natural environment was designed to determine performance of the sugar cane product and commercially available natural fiber geotextiles of wood, straw, and coconut fiber. Field test results indicated that the sugar cane mats allowed grass from planted seed to germinate and the mats maintained integrity during heavy rains. Due to …

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Cloning, Sequencing And Regulation Of The Rhodobacter Capsulatus Hemh Gene., Ekaterina Vladislavova Kanazireva Jan 1997

Cloning, Sequencing And Regulation Of The Rhodobacter Capsulatus Hemh Gene., Ekaterina Vladislavova Kanazireva

LSU Historical Dissertations and Theses

Rhodobacter capsulatus, a purple non-sulfur photosynthetic bacterium, synthesizes four tetrapyrrole end products: heme, bacteriochlorophyll, siroheme and vitamin B$\sb{12}$ via the common tetrapyrrole biosynthetic pathway. The biosynthesis of tetrapyrroles in R. capsulatus is a complex and precisely controlled process which has been under extensive investigation. In order to study the regulation of tetrapyrrole biosynthesis, the R. capsulatus hemH gene was cloned by complementation of an E. coli $\Delta hemH$ mutant and sequenced. The enzyme ferrochelatase, encoded by the hemH gene, catalyzes the insertion of ferrous iron into protoporphyrin IX, thus producing heme. The consensus ferrochelatase signature sequence was found in the …

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Gravity-Assisted Tertiary Gas Injection Process In Water-Drive Oil Reservoirs., Bogdan Lepski Jan 1997

Gravity-Assisted Tertiary Gas Injection Process In Water-Drive Oil Reservoirs., Bogdan Lepski

LSU Historical Dissertations and Theses

In dipping, water-drive reservoirs, substantial incremental oil can be produced using gravity-assisted gas injection improved recovery processes. These processes include the Double Displacement Process (DDP) and the Second-Contact Water Displacement (SCWD). The efficiency of these processes depends, in part, on phase distribution in the pore space after gas injection which in turn depends on interfacial and surface tensions (IFT) of the phases involved. The research described here-in pertains to experimental work performed to investigate various aspects of the DDP and the SCWD in both homogenous and heterogeneous rock types with dead oil/nitrogen and recombined-oil/methane fluid systems. Additional work was performed …

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Structure-Activity Relationships Of Nitroarenes: Mutagenicity, Oxygen Consumption, Toxicity, And Xenobiotic Radical Production., Caroline Ann Metosh-Dickey Jan 1997

Structure-Activity Relationships Of Nitroarenes: Mutagenicity, Oxygen Consumption, Toxicity, And Xenobiotic Radical Production., Caroline Ann Metosh-Dickey

LSU Historical Dissertations and Theses

The nitroreduction of 4NQO and five structural analogs were studied with respect to radical production and mutagenicity. In the umu assay, 4NQO was the most mutagenic analog. Addition of microsomal and cytosolic protein from induced and uninduced rat liver samples decreased 4NQO mutagenicity in the standard strain (Salmonella typhimurium TA 1535/psk1002) 4NQO mutagenicity was also found to be decreased in the nitroreductase-deficient strain (Salmonella typhimurium TA1535NR/psk1002). In several strains of the Protox$\rm\sp{TM}$ assay 4NQO yielded the highest induction rate as compared to other compounds tested. In the presence of ascorbate 4NQO cytotoxicity, but not mutagenicity, was substantially enhanced. Oxygen consumption …

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Development And In Vivo Evaluation Of A Pura Mutant Strain Of The Channel Catfish Pathogen Edwardsiella Ictaluri., Mark Lee Lawrence Jan 1997

Development And In Vivo Evaluation Of A Pura Mutant Strain Of The Channel Catfish Pathogen Edwardsiella Ictaluri., Mark Lee Lawrence

LSU Historical Dissertations and Theses

Edwardsiella ictaluri is the causative agent of enteric septicemia of catfish (ESC), which is the most serious disease affecting the channel catfish industry. Killed vaccines have been inconsistent in providing protection against ESC, and no live attenuated vaccines have been described. The purpose of this study was to develop a nutritionally attenuated mutant strain of E. ictaluri and evaluate its virulence and vaccine efficacy. An E. ictaluri genomic library was constructed, and a clone containing the purA gene was isolated and sequenced. The E. ictaluri purA gene was found to have several features in common with the E. coli purA …

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Global Experimental Effects Of Country Of Origin And Product Type On The Structural Parameters Of A Purchase Intentions Model., Ruth L. Lumb Jan 1997

Global Experimental Effects Of Country Of Origin And Product Type On The Structural Parameters Of A Purchase Intentions Model., Ruth L. Lumb

LSU Historical Dissertations and Theses

An empirical assessment of the overall effects of country of origin and product type on the structural parameters of a purchase intentions model is undertaken. First, it is theorized that (1) product involvement, (2) perceived risk, (3) psychic distance, (4) perceived product quality, and (5) national character will directly or indirectly affect purchase intentions of imported goods. These constructs form the operational framework for purchase intentions of foreign-made products, which is presented in the form of a structural equation model. Secondly, it is proposed that country of origin and product type may be viewed as global experimental variables, thereby having …

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Visualizing Autobiography: Intersections Of Gender, Representation, Curriculum Theory., Anne Elizabeth Pautz Jan 1997

Visualizing Autobiography: Intersections Of Gender, Representation, Curriculum Theory., Anne Elizabeth Pautz

LSU Historical Dissertations and Theses

Defined by customs of femininity, women who transcend those definitions find it difficult to represent themselves in a comprehensible manner. The contradictions between the actual activities of life and the demands of femininity require woman to adopt unique approaches to self-representation in order to be accepted. Tied to the biological functions of their bodies through images in the media and social institutions, as well as their internalized images, women often find trying to represent themselves beyond or against their body problematic. The female body is presented as controller of destiny, both through beauty and motherhood requirements. Women often create representations …

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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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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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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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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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Design And Analysis Of Optical Interconnection Networks For Parallel Computation., Yueming Li Jan 1997

Design And Analysis Of Optical Interconnection Networks For Parallel Computation., Yueming Li

LSU Historical Dissertations and Theses

In this doctoral research, we propose several novel protocols and topologies for the interconnection of massively parallel processors. These new technologies achieve considerable improvements in system performance and structure simplicity. Currently, synchronous protocols are used in optical TDM buses. The major disadvantage of a synchronous protocol is the waste of packet slots. To offset this inherent drawback of synchronous TDM, a pipelined asynchronous TDM optical bus is proposed. The simulation results show that the performance of the proposed bus is significantly better than that of known pipelined synchronous TDM optical buses. Practically, the computation power of the plain TDM protocol …

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Tickets To His Head: Larry Gelbart (1928-) As Writer And Adaptor., Jules Adolphe Malarcher Iii Jan 1997

Tickets To His Head: Larry Gelbart (1928-) As Writer And Adaptor., Jules Adolphe Malarcher Iii

LSU Historical Dissertations and Theses

Larry Gelbart (1928-) has dominated the field of comedy writing in the latter half of the twentieth century the way George S. Kaufman (1889-1961) dominated the first half. Comedy, according to Gelbart, is a "tic--a way of making myself comfortable. I can't imagine not having comedy to lean on. I tend to write things with a circus-like atmosphere. In my mind, there's a circus--three rings--all the time.". The three comedy rings in his head may be classified according to the areas where his unique talents especially emerge: (1) talent to adapt comedy from one medium to another, or from one …

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Educational Plans Of Community College Students: An Expansion Of Two College Choice Models., Lisa M. Smith-Vosper Jan 1997

Educational Plans Of Community College Students: An Expansion Of Two College Choice Models., Lisa M. Smith-Vosper

LSU Historical Dissertations and Theses

The purpose of this study was to determine if the factors posited by previous researchers to affect predisposition to attend college in high school students also affect the predisposition to transfer in the two-year college student population, and to investigate whether or not an expansion of the Hossler and Gallagher (1987) three-phase model of college choice and the Hossler and Stage (1992) Model of High School Students' Predisposition to College would yield great benefits. This analogy uses variables that have been advanced as effectual in the predisposition stage of the college choice process on the selected student population. The problem …

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Characterization Of Monomer-Containing Monolayer Films On Au Surfaces., Robert J. Willicut Jan 1997

Characterization Of Monomer-Containing Monolayer Films On Au Surfaces., Robert J. Willicut

LSU Historical Dissertations and Theses

Exploration into the nature of ultrathin, surface-confined films capable of electronic conduction has been the primary purpose of this dissertation. Specifically, the confinement of pyrrole monomer to Au surfaces through organosulfur linkages has been investigated. The synthesis of these new $\omega$-(N-pyrrolyl)alkanethiols is described herein. Cyclic voltammetry was utilized in this work to polymerize the monolayers and characterize the resulting films. Voltammetric analysis yielded currents in the correct potential region for poly(N-alkylpyrrole) charging/discharging. Other electrochemical studies revealed the ability of strong nucleophiles and electroinactive diluents to quench surface-confined polymer formation though they did not affect oxidation of the monomer. Exchange experiments …

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The Production Of Glucooligosaccharides By Leuconostoc Mesenteroides Atcc 13146 And Lipomyces Starkeyi Atcc 74054., Sun Kyun Yoo Jan 1997

The Production Of Glucooligosaccharides By Leuconostoc Mesenteroides Atcc 13146 And Lipomyces Starkeyi Atcc 74054., Sun Kyun Yoo

LSU Historical Dissertations and Theses

Glucooligosaccharides of less than DP 10 were produced either by mixed cultures of Leuconostoc mesenteroides ATCC 13146 and L. starkeyi ATCC 74054, or by an acceptor reaction produced by Leuconostoc mesenteroides ATCC 13146. The yields of glucooligosaccharides produced by mixed culture and acceptor reaction reached up to 49 and 90% of theoretical yield. The composition of carbohydrates at the end of fermentation by mixed culture was 31.4% oligosaccharides, 17.6% dextran, 31.4% mannitol, 2.1% fructose, and 2.4% of sucrose. The composition of carbohydrates at the end of fermentation by acceptor reaction was 32.7% pannose, 30.4% branched isomaltotetraose (DP 4), 21.7% branched …

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A Feminist Study Of African American Art In New Orleans: Considerations Of Aesthetics, Art History And Art Criticism., Harriet Joanne Walker Jan 1997

A Feminist Study Of African American Art In New Orleans: Considerations Of Aesthetics, Art History And Art Criticism., Harriet Joanne Walker

LSU Historical Dissertations and Theses

How students are taught to think about what is considered "art" and who are "artists" contributes to their sense of self within the world. It can confine them to accept a system that devalues and excludes or it can inspire them to explore the political dimensions of art, to recognize social contradictions, and to contribute to cultural dialogue. The purpose of this study is to provide content for an art curriculum that develops the intellectual capabilities and broadens the critical consciousness of students. The study of aesthetics, art history, and art criticism offer possibilities for understanding the multiple social, historical, …

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Fluorescence Lifetime Discrimination Of Near-Infrared Dye-Labeled Oligonucleotide Fragments Separated By Capillary Gel Electrophoresis For Base-Calling Applications In Dna Sequencing., Benjamin Leighton Legendre Jr Jan 1997

Fluorescence Lifetime Discrimination Of Near-Infrared Dye-Labeled Oligonucleotide Fragments Separated By Capillary Gel Electrophoresis For Base-Calling Applications In Dna Sequencing., Benjamin Leighton Legendre Jr

LSU Historical Dissertations and Theses

The research presented in this dissertation involves the construction of a near-infrared time-correlated single photon counting system which utilizes a mode-locked Ti:sapphire or pulsed diode laser as the excitation source and single photon avalanche diode as the photodetector and the subsequent study of two simple algorithms, the Maximum Likelihood Estimator (MLE) and the Rapid Lifetime Determination (RLD) methods, for fluorescence lifetime determination. The purpose of this research is to aid in the development of a low cost, highly efficient, and high throughput device for DNA sequencing which utilizes near-IR fluorophores which have similar absorption and emission properties but possess unique …

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Franz Liszt's Piano Transcriptions Of "Sonetto 104 Del Petrarca"., Nam Yeung Jan 1997

Franz Liszt's Piano Transcriptions Of "Sonetto 104 Del Petrarca"., Nam Yeung

LSU Historical Dissertations and Theses

This paper focuses on the similarities and differences between the two versions of Franz Liszt's piano transcriptions of the Sonetto 104 del Petrarca. Chapter One provides a brief overview of Franz Liszt as a pianist, composer, teacher, conductor, and piano transcriber. Chapter Two discusses Liszt as a song transcriber and includes the titles of some of his important song transcriptions. Chapter Three includes the chronological order of different versions of Sonetto 104 del Petrarca. Chapter Four contains information about the first piano transcription of Sonetto 104 del Petrarca (the 1846 version). Chapter Five contrasts the similarities and differences between the …

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A Study Of Ralph Vaughan Williams's "An Oxford Elegy" And "Epithalamion"., Robert Joseph Taylor Jan 1997

A Study Of Ralph Vaughan Williams's "An Oxford Elegy" And "Epithalamion"., Robert Joseph Taylor

LSU Historical Dissertations and Theses

Choral music occupies a central place in the compositional output of Ralph Vaughan Williams. Some pieces, such as the Sea Symphony (1909), Five Mystical Songs (1911), Mass in G minor (1922), and Serenade to Music (1938), have become standards in the choral repertoire. Others, such as Sancta Civitas (1925), Dona Nobis Pacem (1936) and Hodie (1954), may be less familiar, but have still received considerable critical acclaim. A few pieces remain relatively unknown even to choral conductors. Two choral works, Epithalamion (1957) and An Oxford Elegy (1949), fall into this latter category. This monograph is the first detailed study of …

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Feminist Issues In "Scarecrow And Mrs. King" And In "Lois And Clark"., Sharon E. Broussard Jan 1997

Feminist Issues In "Scarecrow And Mrs. King" And In "Lois And Clark"., Sharon E. Broussard

LSU Historical Dissertations and Theses

"Feminist Issues in Scarecrow and Mrs. King and in Lois and Clark" looks at television portrayals of female leads in the female-male investigative team. The two series, which aired ten years apart, were chosen for their escapist and fantasy qualities. One hypothesis of this research was that the latter show, Lois and Clark, would exhibit more feminist tendencies. Episodes from each series were examined for events and dialogue significant to the presentation of the female lead. These events and dialogue were arranged into four categories: female-female relationships, female-male relationships, romantic involvements, and professional relationships. An encompassing element was also addressed …

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Generation Of Attosecond Pulses In Macroscopic Media, Philippe Antoine, Dejan B. Milošević, Anne L’Huillier, Mette B. Gaarde, Pascal Salières, Maciej Lewenstein Jan 1997

Generation Of Attosecond Pulses In Macroscopic Media, Philippe Antoine, Dejan B. Milošević, Anne L’Huillier, Mette B. Gaarde, Pascal Salières, Maciej Lewenstein

Faculty Publications

We describe theoretically the generation of ultrashort (subfemtosecond) pulses using high-order harmonics of a laser pulse with a time-dependent degree of ellipticity. The single-atom response is calculated by using a low-frequency strong-field approximation. Propagation effects are taken into account using a method going beyond the slowly varying envelope approximation. Propagation modifies significantly the results obtained in the single-atom response and, in certain conditions, makes the generation of one attosecond pulse possible. We discuss prospects for the observation of these ultrashort pulses. © 1997 The American Physical Society.

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