Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

LSU Historical Dissertations and Theses

Discipline
Keyword
Publication Year

Articles 691 - 720 of 7796

Full-Text Articles in Entire DC Network

Design Of Work-Rest Schedules For Vdt Operators., Rana Balci Jan 1999

Design Of Work-Rest Schedules For Vdt Operators., Rana Balci

LSU Historical Dissertations and Theses

The number of musculoskeletal and psychological discomforts is increasing as a result of continuing growth of VDT work. Although ergonomic improvements in workstation design can be applied, an effective work-rest schedule is an economical way to reduce these problems. The objective of this research was to determine an effective work-rest schedule for VDT operators. In addition to a discomfort questionnaire, performance and electromyography measurements from trapezius and flexor carpi radialis were used. Three different work-rest schedules were applied: 60-minute work/10-minute rest, 30-minute work/5-minute rest, and for the third schedule, the subjects received four breaks from VDT work each hour additional …

Go to article

Holding Back The Waters: Land Development And The Origins Of Levees On The Mississippi, 1720-1845., Jeffrey Alan Owens Jan 1999

Holding Back The Waters: Land Development And The Origins Of Levees On The Mississippi, 1720-1845., Jeffrey Alan Owens

LSU Historical Dissertations and Theses

Man's efforts to control flooding on the Mississippi began about 280 years ago, but the first 130 years has been neglected in scholarly literature. In spite of abundant primary sources, most histories of flood control on the Mississippi revolve around hydraulic engineering and the contributions of state and federal levee bureaucracies---factors which had almost no impact on the creation of the levee system. Engineers did install the first levee at New Orleans and levees on their own plantations in the 1720s, but the extension of the levee line thereafter was almost entirely the work of private land developers supervised at …

Go to article

Nonaxisymmetric Equilibrium Models For Gaseous Galaxy Disks., Paul Fisher Jan 1999

Nonaxisymmetric Equilibrium Models For Gaseous Galaxy Disks., Paul Fisher

LSU Historical Dissertations and Theses

Three-dimensional hydrodynamic simulations show that, in the absence of self-gravity, an axisymmetric, gaseous galaxy disk whose angular momentum vector is initially tipped at an angle i0 to the symmetry axis of a fixed spheroidal dark matter halo potential does not settle to the equatorial plane of the halo. Instead, the disk settles to a plane that is tipped at an angle a = arctan [ q2 tan i0] to the equatorial plane of the halo, where q is the axis ratio of the halo equipotential surfaces. The equilibrium configuration to which the disk settles appears to be flat but it …

Go to article

Interactions On Minerals And Organic Materials Along The Salinity Gradient In Barataria Basin, Louisiana., Jessica Anne Kastler Jan 1999

Interactions On Minerals And Organic Materials Along The Salinity Gradient In Barataria Basin, Louisiana., Jessica Anne Kastler

LSU Historical Dissertations and Theses

Changes in the associations among mineral and organic materials in estuaries may control the nature and quantity of organic material (OM) preserved in sediment deposits or cycled in the water column. Estuarine sediment-OM attachments were examined using descriptive analyses and experiments to assess their response to salinity changes and the bioavailability of sedimentary OM. Desorption experiments compared the amount of organic carbon extracted from sediment in rinses of different salinity. Uptake experiments monitored changes in carbon and bacteria concentrations to compare the bioavailability of dissolved and sedimentary OM. Clay mineralogy, surface area and elemental analysis of suspended and deposited sediment …

Go to article

Studies On Cyclooxygenase-2 Expression In Lipopolysaccharide-Stimulated Macrophages., Byeong Churl Jang Jan 1999

Studies On Cyclooxygenase-2 Expression In Lipopolysaccharide-Stimulated Macrophages., Byeong Churl Jang

LSU Historical Dissertations and Theses

Cyclooxygenase (COX) is the key enzyme in the biosynthesis of prostaglandins (PGs) known as pro-inflammatory mediators. COX has two isoforms: the constitutively expressed COX-1 and the mitogen-inducible COX-2. It has been demonstrated that COX-2 expression is selectively induced by lipopolysaccharide (LPS) treatment after several hours in rat alveolar macrophages (Lee et al., 1992; Chanmugam et al., 1995). The mitogen-activated protein kinases [MAPKs; extracellular signal-regulated kinases (ERKs), P38, and c-jun N-terminal kinases (JNKs)], nuclear factor kappa B (NF-kB), and Lyn kinase are known to be activated in the early stages (within minutes) of LPS signaling pathways. In the current study, the …

Go to article

Precursors For Chemical And Photochemical Vapor Deposition Of Copper Metal., Alicia Marie James Jan 1999

Precursors For Chemical And Photochemical Vapor Deposition Of Copper Metal., Alicia Marie James

LSU Historical Dissertations and Theses

The colorless square-planar cluster [CuN(SiMe3)2] 4, which contains four Cu(I) ions with four bridging amide groups, was studied as a precursor for chemical and photochemical vapor deposition of Cu metal. The cluster phosphoresces in CH2Cl2 solution and in the solid state at room temperature. Its electronic spectrum in CH 2Cl2 consists of two intense bands which are assigned to symmetry-allowed 3d → 4p transitions; the phosphorescence is also likely to be metal-centered. Solid [CuN(SiMe3)2]4 luminesces with approximately the same spectrum as that of the CH2Cl2 solutions. At 77 K, the solid-state luminescence red-shifts slightly. The emission lifetime in glassy Et2O …

Go to article

Chromosomal Location Of Genes For Leafiness (Lfy1) And Susceptibility To Nicosulfuron (Nsf1) In Maize Genome., Orlando Jose Moreno Jan 1999

Chromosomal Location Of Genes For Leafiness (Lfy1) And Susceptibility To Nicosulfuron (Nsf1) In Maize Genome., Orlando Jose Moreno

LSU Historical Dissertations and Theses

Genes that may confer resistance to diseases, tolerance to plant stress, good stalk quality, high yield potential and/or other desirable attributes are important. The leafy gene (Lfy1Lfy1) discovered in 1971 in maize (Zea mays L.) is known to produce much higher yields in hybrids that possess it. These hybrids suffer much less stalk lodging than those with the non-leafy (lfy1 lfy1) gene. The location of the leafy gene to a chromosome arm could facilitate both its transfer from one genotype to another and its use in linkage studies and aid in completing the maize linkage map. The purpose of this …

Go to article

How Does Undergraduate College Biology Students' Level Of Understanding, In Regard To The Role Of The Seed Plant Root System, Relate To Their Level Of Understanding Of Photosynthesis?, James Gicheha Njeng'ere Jan 1999

How Does Undergraduate College Biology Students' Level Of Understanding, In Regard To The Role Of The Seed Plant Root System, Relate To Their Level Of Understanding Of Photosynthesis?, James Gicheha Njeng'ere

LSU Historical Dissertations and Theses

This research study investigated how undergraduate college biology students' level of understanding of the role of the seed plant root system relates to their level of understanding of photosynthesis. This research was conducted with 65 undergraduate non-majors biology who had completed 1 year of biology at Louisiana State University in Baton Rouge and Southeastern Louisiana University in Hammond. A root probe instrument was developed from some scientifically acceptable propositional statements about the root system, the process of photosynthesis, as well as the holistic nature of the tree. These were derived from research reviews of the science education and the arboriculture …

Go to article

The Role Of Financial Aid Counseling In Students' Understanding Of Student Loan Management., Julia Young Porter Jan 1999

The Role Of Financial Aid Counseling In Students' Understanding Of Student Loan Management., Julia Young Porter

LSU Historical Dissertations and Theses

This exploratory research study examined public university students' perceptions about their own loan debt management knowledge and about the counseling practices used to prepare them for their loan responsibilities. From the target population of all students enrolled at Louisiana State University during the Spring 1999 Semester, a systematic random sample was selected. Of the 1,204 students who participated in the study, 433 had loans. The 34-question survey instrument included 11 demographic characteristic questions and 1 open-ended question asked of all respondents. Two additional demographic questions and 20 perception statements about the loan process were asked of loan recipients. This study …

Go to article

The Historical And Cultural Geography Of The Grange In Minnesota And Louisiana, 1870-1880., Linda Marie Thorstad Jan 1999

The Historical And Cultural Geography Of The Grange In Minnesota And Louisiana, 1870-1880., Linda Marie Thorstad

LSU Historical Dissertations and Theses

This study uses historical and geographical inquiry to examine postbellum agrarian social, political and economic unrest that in 1868 led to the formation of the first national, secret and ritualistic, fraternal agricultural society known as the Grange. The Grange was created to unite farmers through cooperative buying and selling, to promote agricultural education, and to create a social organization that encouraged both women and men to acquire and refine leadership skills. It also sought to address concerns over monopolies and promoted state regulation of railroad rates. Although Grange membership peaked in 1875 and sharply declined through 1880, it forged the …

Go to article

Effects Of Fluctuating Salinity, Nutritional State, And Temperature On Leptasterias Spp. From Little Port Walter, Alaska., Jeffrey William Tamplin Jan 1999

Effects Of Fluctuating Salinity, Nutritional State, And Temperature On Leptasterias Spp. From Little Port Walter, Alaska., Jeffrey William Tamplin

LSU Historical Dissertations and Theses

The effects of fluctuating salinity, nutritional state, and temperature on activity, oxygen consumption, feeding, and growth rates were analyzed on seasonally collected Leptasterias spp. (Echinodermata: Asteroidea) from Little Port Walter, AK. Leptasterias aspera and L. epichlora were collected on June 10, 1994, divided into size groups, and perivisceral fluid osmolality was measured every three hours during a 12 h 30-10-30‰S fluctuating cycle. The perivisceral fluid osmolality of larger individuals fluctuated less than that of smaller sea stars. The perivisceral fluid osmolality of small and large Leptasterias spp. closely tracks the ambient water osmolality during tidal cycles. Leptasterias spp. were collected …

Go to article

Effectiveness Of Web-Based Virtual Learning Environments In Business Education: Focusing On Basic Skills Training For Information Technology., Rami Mahmoud Ahmad Jan 1999

Effectiveness Of Web-Based Virtual Learning Environments In Business Education: Focusing On Basic Skills Training For Information Technology., Rami Mahmoud Ahmad

LSU Historical Dissertations and Theses

Calls for transforming the learning industries and revolutionizing business education are being answered by a proliferation of virtual learning environments, capitalizing on ever-growing and universal Internet-related technologies. This dissertation describes research investigating the effectiveness of web-based virtual environments by comparing traditional and information technology enhanced learning environments. A conceptual framework is proposed contrasting the effectiveness of these two environments across two learning models---the objectivist and the constructivist. Although technology may serve as a moderator that enhances the implementation of certain features of a learning model, there is a consensus that the learning model---not the technology---is the primary cause of learning. …

Go to article

Extratropical Storms Of The Gulf Of Mexico And Their Effects Along The Northern Coast Of A Barrier Island: West Ship Island, Mississippi., Phillip Lynn Chaney Jan 1999

Extratropical Storms Of The Gulf Of Mexico And Their Effects Along The Northern Coast Of A Barrier Island: West Ship Island, Mississippi., Phillip Lynn Chaney

LSU Historical Dissertations and Theses

The north-facing, estuarine shores of barrier islands along the northern Gulf of Mexico are experiencing severe shoreline erosion. This erosion process is related to storm events that occur when cold fronts pass along the coast. These cold fronts are associated with the migration of extratropical (mid-latitude) cyclones and anticyclones across the region in winter. Wind data collected by a NOAA weather buoy over the period 1981--1997 were used, in conjunction with daily weather maps, to evaluate winter storm activity. Seven synoptic weather patterns that produced extratropical storm events along the northern Gulf Coast were identified. Statistics were computed for the …

Go to article

In Vivo And In Vitro Stimulation Of Murine Splenocytes With Brevetoxin-2 Immunogenic Conjugates For The Preparation Of Monoclonal Antibodies Against Ciguatoxin-Related Compounds., Sonia Edith Guzman Perez Jan 1999

In Vivo And In Vitro Stimulation Of Murine Splenocytes With Brevetoxin-2 Immunogenic Conjugates For The Preparation Of Monoclonal Antibodies Against Ciguatoxin-Related Compounds., Sonia Edith Guzman Perez

LSU Historical Dissertations and Theses

The proliferation of toxic algae is a natural phenomenon known as a harmful algal bloom. Ciguatera fish poisoning and neurotoxic fish poisoning are syndromes associated with this phenomenon. Current methods for the detection of their toxins (ciguatoxins and brevetoxins) are expensive, time-consuming, require trained personnel and special laboratory equipment. In the case of ciguatoxins, the lack of standard material worsens the problem. Specific objectives of this study included the use of brevetoxin-2 (PbTx-2) for the preparation of antibodies which could cross-react with ciguatoxins, the use of different PbTx-2 immunogenic conjugates, the use of in vivo versus in vitro stimulation of …

Go to article

In Situ Nmr And Ft-Ir Studies On A Bimetallic Hydroformylation Catalyst., Rhonda Carter Matthews Jan 1999

In Situ Nmr And Ft-Ir Studies On A Bimetallic Hydroformylation Catalyst., Rhonda Carter Matthews

LSU Historical Dissertations and Theses

This work describes a study of the mechanism by which a unique homogeneous bimetallic hydroformylation catalyst based on two rhodium metal centers chelated and bridged by a special tetraphosphine ligand works via bimetallic cooperativity. Hydroformylation runs on this bimetallic system which indicate higher rates of production and higher linear to branched product regioselectivity relative to the commercial monometallic Rh/PPh3 catalyst make this system a viable candidate for an almost completely new and effective way of performing hydroformylation catalysis. Numerous complexes have been characterized by in situ FT-IR and NMR spectroscopic studies, as well as X-ray crystallography, and support the presence …

Go to article

Systematics, Ecology, And Social Biology Of The Musk Duck (Biziura Lobata) Of Australia., Kevin Grant Mccracken Jan 1999

Systematics, Ecology, And Social Biology Of The Musk Duck (Biziura Lobata) Of Australia., Kevin Grant Mccracken

LSU Historical Dissertations and Theses

Musk Ducks (Biziura lobata) exhibit a number of unusual morphological and behavioral traits. The most notable of these include: greatly abducted hind-limbs for underwater swimming efficiency, extreme sexual size dimorphism and pronounced structural dimorphism, lek display activity, elaborate sexual display repertoires, and the distinctly non-waterfowl-like trait of provisioning young with all their food from the time of hatch until fledging. Despite such peculiarities and obvious theoretical potential in the areas of comparative morphology, sexual selection, and brood ecology, few studies of Musk Ducks have been undertaken, and those to date have been either small in scope and design, or focused …

Go to article

Improving Searches For Gravitational Wave Bursts., Carroll Andrew Morse Jan 1999

Improving Searches For Gravitational Wave Bursts., Carroll Andrew Morse

LSU Historical Dissertations and Theses

The first half of this dissertation discusses the details of calibrating a resonant mass gravitational wave antenna and determining its sensitivity. We dispense with the assumption of a perfectly tuned antenna and transducer and model the system using a coordinate rotation. We demonstrate that all of the important model parameters can be directly measured. We demonstrate that the signal response of the two detector modes should be equal despite any mistuning and that the mistuning parameter can be measured in two separate ways. These properties are useful for determining the degree to which a real detector's behavior parallels that of …

Go to article

Plasma Enhanced Chemical Vapor Deposition Of Silicon Nitride And Oxynitride Films Using Disilane As Silicon Source., Giridhar Nallapati Jan 1999

Plasma Enhanced Chemical Vapor Deposition Of Silicon Nitride And Oxynitride Films Using Disilane As Silicon Source., Giridhar Nallapati

LSU Historical Dissertations and Theses

Process characterization details along with the electrical properties of plasma enhanced chemical vapor deposited silicon nitride and oxynitride films are reported, for the first time, using disilane as the silicon source. Two regimes of deposition, namely excess-disilane regime and excess-ammonia regime, were observed for deposition of silicon nitride films using disilane, ammonia and helium. Films deposited under process conditions falling at the boundary of these two regimes had deposition rates that were mostly dependent on rf power and gas flow ratio resulting in highly repeatable film qualities. Silicon nitride films deposited on Si wafers at 250°C and post-metallization annealed in …

Go to article

Biological Diversity And Cultural Survival: Mopan Maya Traditional Culture And Environmental Change In Southern Belize., Michael Kenneth Steinberg Jan 1999

Biological Diversity And Cultural Survival: Mopan Maya Traditional Culture And Environmental Change In Southern Belize., Michael Kenneth Steinberg

LSU Historical Dissertations and Theses

This dissertation is a study of the causal relationship between the decline of cultural diversity and environmental diversity. My study investigates the larger-scale economic, political, and social factors that result in the rejection of traditional land use strategies and how these changing strategies ultimately lead to an overall decline in environmental diversity in the Mopan Maya landscape in southern Belize. Five Mopan Maya cultural biogeographic case studies are presented, including the management of maize diversity, the species composition and variability of kitchen gardens, swidden-fallow agroforestry practices, traditional bee keeping, and hunting game and habitat preferences. These topics were chosen because …

Go to article

An Analysis And Performer's Guide To The Sonatine For Flute And Piano By Pierre Boulez., Diana M. Tiffany Jan 1999

An Analysis And Performer's Guide To The Sonatine For Flute And Piano By Pierre Boulez., Diana M. Tiffany

LSU Historical Dissertations and Theses

In spite of the preeminence of its composer, the Sonatine for Flute and Piano by Pierre Boulez is not a well known work. The piece poses truly formidable technical and aesthetic challenges for players and audiences. The purpose of this study is to present an analysis and some practical suggestions for flutists preparing the piece for performance. This serial-based work is divided into four continuous main stanzas, each demonstrating a different style and varying compositional techniques while using the same row. The repetition of specific pitch-class sets, rhythm motives, and pitch classes within each stanza lends each one aurally identifiable …

Go to article

An Empirical Examination Of Maximum Entropy Estimation., Randall Charles Campbell Jan 1999

An Empirical Examination Of Maximum Entropy Estimation., Randall Charles Campbell

LSU Historical Dissertations and Theses

Maximum entropy estimation is a relatively new estimation technique in econometrics. We carry out several Monte Carlo experiments using real data as a basis in order to understand the properties of the maximum entropy estimator. We compare the maximum entropy and generalized maximum entropy estimators to traditional estimation techniques in linear regression, binary choice, and multinomial choice models. In addition, we discuss maximum entropy estimation in censored and truncated regression models. We find that the generalized maximum entropy estimator dominates the logit estimator and the multinomial logit estimator in Monte Carlo experiments. The generalized maximum entropy estimator in discrete choice …

Go to article

Nmr Relaxation Studies Of Cements Used In Waste Disposal And Solid-State Deuterium Nmr Study Of The Molecular Motion In Rhodium Olefin Complexes., Greta Lynn Garner Jan 1999

Nmr Relaxation Studies Of Cements Used In Waste Disposal And Solid-State Deuterium Nmr Study Of The Molecular Motion In Rhodium Olefin Complexes., Greta Lynn Garner

LSU Historical Dissertations and Theses

This dissertation describes two studies that involve the use of solid-state nuclear magnetic resonance spectroscopic techniques. The first is an analysis of the pore size distribution of Portland cements used in solidification/stabilization techniques for hazardous waste disposal and the second is an investigation of the solid state molecular motion of ethene ligands rhodium complexes. Cements play an important role in waste disposal. Low level wastes made of sludges, solids, liquids, and contaminated laboratory equipment are mixed with cements and buried in landfills. This method seems ideal, however major problems occur when materials containing toxic, heavy metals mixed with some organics …

Go to article

A Transformational Reengineering System That Supports Software Maintenance Using A Graph Representation For The Identification Of An Object-Oriented Software Architecture., Ramachenga Reddy Valasareddi Jan 1999

A Transformational Reengineering System That Supports Software Maintenance Using A Graph Representation For The Identification Of An Object-Oriented Software Architecture., Ramachenga Reddy Valasareddi

LSU Historical Dissertations and Theses

The process of maintenance and enhancement of legacy software systems is a laborious and unavoidable task. Often these systems lack structure or modularity, as they were developed using programming languages and paradigms that do not incorporate object-oriented features and sound design principles. The software engineer's task can be simplified if tools are available to identify object like features in the code. These tools can help transform the non-object-oriented code to object oriented code. This research describes a comprehensive and systematic process for transformational reengineering of legacy systems. Research in reengineering is mainly focused on clustering techniques that group procedures present …

Go to article

Production Of L-(+) Lactic Acid From Blackstrap Molasses By Lactobacillus Casei Subspecies Rhamnosus Atcc 11443., Narumol Thongwai Jan 1999

Production Of L-(+) Lactic Acid From Blackstrap Molasses By Lactobacillus Casei Subspecies Rhamnosus Atcc 11443., Narumol Thongwai

LSU Historical Dissertations and Theses

Lactobacillus casei subspecies rhamnosus grew on non-supplemented blackstrap molasses. The bacteria grew best at the optimal temperature of 40 +/- 2°C, and at pH 5.5. Addition of yeast extract to molasses shortened the lag phase and increased cell mass. In batch fermentations without pH control, the highest ratio of lactic acid produced to cell mass was 12 from non-supplemented molasses. For pH controlled batch fermentations, the ratio's of lactic acid produced/cell mass were 81, 79, 51 and 31 for 0, 0.2, 0.4 and 0.8% yeast extract supplementation, respectively. Non-supplemented molasses, 8% Brix, produced 28 +/- 2 g/l of lactic acid …

Go to article

Development Of Immunochemical Methods For Gossypol Analysis., Xi Wang Jan 1999

Development Of Immunochemical Methods For Gossypol Analysis., Xi Wang

LSU Historical Dissertations and Theses

Gossypol is a reactive polyphenolic compound present in the cotton plant. During cottonseed processing, gossypol can react with other compounds to form bound gossypol. Gossypol analyses using chemical methods do not always agree with its bioavailability to animal possibly because of various bound forms of gossypol with different stabilities in vivo and the (+/-)-gossypol enantiomers with different biological activities. The objectives of this research were to produce anti-gossypol antibodies and use antibodies to study gossypol chemistry and to analyze gossypol in cottonseed samples and cottonseed by-products. Polyclonal antibodies were produced from rabbits after they were immunized with gossypol-LPH (Limulus polyphemus …

Go to article

Spectroscopic Studies Of Solid State Cyclodextrin Complexation Reactions With Various Guest Molecules., Michelle Butterfield Young Jan 1999

Spectroscopic Studies Of Solid State Cyclodextrin Complexation Reactions With Various Guest Molecules., Michelle Butterfield Young

LSU Historical Dissertations and Theses

The research presented in this dissertation involves spectroscopic studies of cyclodextrin complexation reactions with various guest molecules. Chapter 1 provides an introduction that forms the basis for the remaining chapters. The topics covered in the introduction include the structures and properties of cyclodextrins with a brief section specifically dedicated to solid cyclodextrin. In addition, the environmental applications of cyclodextrins are discussed. The last part of the introduction concerns the theory and applications of fluorescence spectroscopy. In Chapter 2, the extraction of volatile polycyclic aromatic hydrocarbons (PAHs) from air by use of solid cyclodextrin is presented. Naphthalene was chosen as the …

Go to article

Tennessee Williams And New Orleans: Rewriting The Playwright, Rewriting The City., Mark D. Zelinsky Jan 1999

Tennessee Williams And New Orleans: Rewriting The Playwright, Rewriting The City., Mark D. Zelinsky

LSU Historical Dissertations and Theses

Vieux Carre (1978), Suddenly Last Summer (1958), and A Streetcar Named Desire (1947) are among the many Tennessee Williams' plays and short stories that take New Orleans as their setting; they demonstrate how the city offered an appropriate and complex metaphor to explore his themes. This study centers on Tennessee Williams and New Orleans and explores how the two are linked in a mutually advantageous relationship, how the city informed his work, how his works reflect/re-create the city, and how the combination has passed into popular culture. This work examines the themes and images prevalent in Williams, work that also …

Go to article

Preschool Children's Negotiation Of Intersubjectivity During Rough -And -Tumble Play., Donna Michele Dewolf Jan 1999

Preschool Children's Negotiation Of Intersubjectivity During Rough -And -Tumble Play., Donna Michele Dewolf

LSU Historical Dissertations and Theses

This current study included an exploratory component, as well as, a confirmatory component. The exploratory component of the study involved developing an understanding of how children negotiate intersubjectivity during rough-and-tumble play (R&T play). Utilizing participant observation, the researcher described the context and the experiences of children as they jointly negotiated a shared understanding during R&T play. The researcher discovered, in R&T play, a structure and level of shared thinking among participants similar to other types of social play. The confirmatory component of the study involved conducting analyses on certain child characteristics as they related to participation in R&T play episodes. …

Go to article

Tourism And Place In Treasure Beach, Jamaica: Imagining Paradise And The Alternative., Michael J. Hawkins Jan 1999

Tourism And Place In Treasure Beach, Jamaica: Imagining Paradise And The Alternative., Michael J. Hawkins

LSU Historical Dissertations and Theses

The tourism production system has been generating images of the Jamaican landscape and culture since the mid-nineteenth century. This system consists of those individuals and corporate entities who produce and market the product itself, including travel writers, airlines, advertising agencies, hotel owners and government agencies; and the people, their culture, and elements of the landscape which are commodified as tourist attractions. The tourist gaze has traditionally focused on an idealized Caribbean landscape. Because of a shift in Western patterns of consumption, the focus of the gaze has shifted to emphasize the culture and people who inhabit the landscape. As the …

Go to article

Isolation Of Antimutagenic Compounds In Corn And Cottonseed., Henry Njapau Jan 1999

Isolation Of Antimutagenic Compounds In Corn And Cottonseed., Henry Njapau

LSU Historical Dissertations and Theses

Food, which ensures the sustenance of life, has also been implicated in the development or prevention of numerous diseases including cancer. Cancer may be a result of hereditary factors or genomic instability induced by DNA damage, from the intrinsic chemistry of cells or extrinsic factors like aflatoxin B1. Aflatoxin B1, produced by Aspergillus flavus and Aspergillus parasiticus, is a common contaminant of corn and cottonseed and a proven mutagen and animal carcinogen. Increased scientific knowledge and establishment of regulation have reduced but not eliminated exposure to aflatoxin B1. Complete elimination may be uneconomical for producers and may deprive consumers of …

Go to article

First Prev Next Last