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LSU Historical Dissertations and Theses

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Linguistic And Cultural Immersion And Second Language Acquisition: International Young Student Exchange., Rosita Mira Maristany Jan 1995

Linguistic And Cultural Immersion And Second Language Acquisition: International Young Student Exchange., Rosita Mira Maristany

LSU Historical Dissertations and Theses

The trend in foreign language learning reflects a move from "fragmented" language to "whole" language (Rigg 1991). It includes the individual as well as the social aspect of language acquisition; and the integration of language and culture. Student international exchange programs provide the ideal atmosphere for "whole" language learning and the integration of language and culture in total language and cultural immersion. Most research in international student exchange programs described the organization of the program or addressed a particular variable. There is a need for integrative "whole" research rather than "fragmented" research. The method chosen as most appropriate for this …

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Multiresolutional Fault-Tolerant Sensor Integration And Object Recognition In Images., Lakshman Prasad Jan 1995

Multiresolutional Fault-Tolerant Sensor Integration And Object Recognition In Images., Lakshman Prasad

LSU Historical Dissertations and Theses

This dissertation applies multiresolution methods to two important problems in signal analysis. The problem of fault-tolerant sensor integration in distributed sensor networks is addressed, and an efficient multiresolutional algorithm for estimating the sensors' effective output is proposed. The problem of object/shape recognition in images is addressed in a multiresolutional setting using pyramidal decomposition of images with respect to an orthonormal wavelet basis. A new approach to efficient template matching to detect objects using computational geometric methods is put forward. An efficient paradigm for object recognition is described.

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The Habitat, Ecology And Epidemiology Of Eastern Equine Encephalomyelitis In Southeast Louisiana., Kenny L. Samui Jan 1995

The Habitat, Ecology And Epidemiology Of Eastern Equine Encephalomyelitis In Southeast Louisiana., Kenny L. Samui

LSU Historical Dissertations and Theses

Many unanswered questions on the epidemiology and ecology of eastern equine encephalomyelitis (EEE) still preclude a complete understanding of its natural history. Among these are the distribution and epidemic vectors of EEE virus (EEEV) in different regions, habitats, and foci; its inter-epidemic maintenance, and overwintering mechanisms. Phase 1 of a research project designed to find answers to the above questions with regard to southeast Louisiana was conducted over 1992 and 1993, and consisted of several individual studies. These included 3 mosquito studies to determine major horse- and bird-feeding mosquito species that could be the EEEV epidemic vectors in southeast Louisiana; …

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Structure Elucidation And Chemistry Of Plant Natural Products In Search Of Bioactive Compounds., Heekyung Tak Jan 1995

Structure Elucidation And Chemistry Of Plant Natural Products In Search Of Bioactive Compounds., Heekyung Tak

LSU Historical Dissertations and Theses

A phytochemical study of regional members of five genera of the family Asteraceae was performed in search of bioactive natural products. The aerial parts of Garberia heterophylla, an endemic of the Florida central ridge scrub, were investigated and afforded the known guaianolide-type sesquiterpene lactone eupahakonesin, 2,6-dimethoxybenzoquinone, epifriedelinol and the novel diterpene, garberic acid. Aerial parts of Polymnia uvedalia provided three kaurane-type diterpenes, ($-$) kaur-16-en-19-oic acid, 3$\beta$-angeloyloxy-kaur-16-enic acid, 18-angeloyloxy-kaur-16-enic acid and two melampolides, enhydrin and 2$\sp\prime$, 3$\sp\prime$-dehydromelnerin A. The molecular structure of enhydrin was determined by single crystal X-ray diffraction. Verbesina virginica roots contained three eudesmane p-coumarate, 6$\beta$-p-coumaroyloxy-eudesm-4(15)-ene, 6$\beta$-p-coumaroyloxy-eudesm-4(3)-ene, 6$\beta$-p-coumaroyloxy-4$\beta$-hydroxyeudesmane and …

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Rural Industry And Rural Development In China: The Role Of Geography, Transportation, And Policy In Jiangsu Province., Shew-Jiuan B. Su Jan 1995

Rural Industry And Rural Development In China: The Role Of Geography, Transportation, And Policy In Jiangsu Province., Shew-Jiuan B. Su

LSU Historical Dissertations and Theses

A significant change in China since late 1978 is the development of rural industry (also township-village enterprise, or TVE). Rural industry is particularly important in light of China's current policy of socio-economic decentralization. Rural industry not only absorbs surplus labor and pushes the increases of agricultural productivity, it also revitalizes China's previously lethargic economy. In this study, variations in employment, production value, and economic efficiency of rural industry are analyzed in terms of geographical, transportation and policy determinants at the county/city level of Jiangsu Province in China. Rural industry's contribution to agricultural and rural welfare activities, and how levels of …

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Genotypic Variation In Sweetpotato Ipomoea Batatas (L.) Lam. Clones., Arthur Quejada Villordon Jan 1995

Genotypic Variation In Sweetpotato Ipomoea Batatas (L.) Lam. Clones., Arthur Quejada Villordon

LSU Historical Dissertations and Theses

Arbitrarily-primed PCR-based assays established the presence of sweetpotato intra-clonal genetic variability. These DNA polymorphism assays provided benchmark information regarding cultivar genetic uniformity in sweetpotato foundation seed programs. Arbitrarily-primed markers were also used to compare the genetic uniformity among sweetpotato clones derived conventionally, i.e., through adventitious sprouts, and nodally-based propagation systems. Initially, 38 primers generated 110 scorable DNA fragments using two virus-indexed plants from each clone source. Twenty-one bands (18.6%) were scored as putative polymorphic markers based on the presence or absence of amplified products. A subset of 14 marker loci generated by four selected primers was used to further assay …

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Cloning, Expression, Primary Structure, And Insertion Mutagenesis Of The Pyruvate Formate-Lyase Enzyme Of Aeromonas Hydrophila., Mohamed Alaa Eldin Abdelalim Awad Jan 1995

Cloning, Expression, Primary Structure, And Insertion Mutagenesis Of The Pyruvate Formate-Lyase Enzyme Of Aeromonas Hydrophila., Mohamed Alaa Eldin Abdelalim Awad

LSU Historical Dissertations and Theses

The pyruvate formate-lyase enzyme (Pfl), a key enzyme in alcoholic fermentation, catalyzes the anaerobic conversion of pyruvate into acetyl-CoA and formate in prokaryotes. The pyruvate formate-lyase gene (pfl) of the facultative anaerobe Aeromonas hydrophila was cloned and sequenced. Subsequently, the Pfl was characterized based on the deduced amino acid sequence and evaluated in vivo following insertion mutagenesis. Finally, the pathogenesis of a defined mutant was compared to wild type A. hydrophila in channel catfish. The pfl of A. hydrophila was identified from two recombinant pBluescript SK(-) clones excised from a $\lambda$ ZAP II phage library. Both clones carried the same …

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The Production Of Triploid Oyster Larvae (Crassostrea Virginica (Gmelin)) In Louisiana., John Eric Supan Jan 1995

The Production Of Triploid Oyster Larvae (Crassostrea Virginica (Gmelin)) In Louisiana., John Eric Supan

LSU Historical Dissertations and Theses

Gonadal recycling of oyster broodstock, salinity effects during induction, and cytochalasin B (CB) dosage were investigated as factors affecting the production of triploid oyster larvae in Louisiana. These factors were studied at an oyster hatchery on Grand Isle, LA during 1992-1994 to help transfer triploid oyster technology to the Gulf region. Oyster broodstock were held nearshore in Caminada Bay, Louisiana and histologically analyzed between induced spawnings and during the winter of 1992-1993. Gametogenesis was analyzed qualitatively by developmental staging and quantitatively using mean gonad/body ratios (GBR) per section. The monthly percent occurrence of the developmental stages, as well as histological …

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Studies Of V-Nitrogenase From Azotobacter Vinelandii: Structural Variations, Temperature And Solvent Effects., Carol Zembiak Blanchard Jan 1995

Studies Of V-Nitrogenase From Azotobacter Vinelandii: Structural Variations, Temperature And Solvent Effects., Carol Zembiak Blanchard

LSU Historical Dissertations and Theses

When Q-Sepharose was used in the purification of the V-nitrogenase proteins from Azotobacter vinelandii, an increase in resolution was observed which resulted in a separation of the nitrogenase component 1 protein (Av1$\sp\prime$) into two forms, labeled Av1$\sp\prime\sb{\rm A}$ and Av1$\sp\prime\sb{\rm B}.$ Even though both forms possessed the same enzymatic behavior, Av1$\sp\prime\sb{\rm A}$ exhibited a lower specific activity and migrated during gel filtration with an apparent lower molecular weight than Av1$\sp\prime\sb{\rm B}.$ Furthermore, SDS-polyacrylamide gel electrophoresis showed different relative compositions of the two major subunits of both forms with Av1$\sp\prime\sb{\rm A}$ possessing a trimer $(\alpha\beta\sb2)$ pattern compared to the tetramer $(\alpha\sb\beta\sb2)$ …

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The Pueblo Region As A Linguistic Area: Diffusion Among The Indigenous Languages Of The Southwest United States., Catherine Bereznak Jan 1995

The Pueblo Region As A Linguistic Area: Diffusion Among The Indigenous Languages Of The Southwest United States., Catherine Bereznak

LSU Historical Dissertations and Theses

The goal of this dissertation is to investigate whether the Pueblo region of the Southwest United States is a legitimate linguistic area (LA). The Pueblo region has long been recognized as a cohesive culture area, but an in-depth examination of the Pueblo region as a linguistic area has not previously been done. Because a linguistic area is by definition an area in which linguistic features have spread through diffusion, traits which are widespread for other reasons (e.g., genetic inheritance or independent parallel development) must be eliminated as evidence for a Pueblo LA. The methodological approach which I adopt emphasizes the …

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The Analysis Of Employee Stock Ownership Plans Within Asymmetric Information, Insider Ownership, And Insider Trading Frameworks., David Alan Deboeuf Jan 1995

The Analysis Of Employee Stock Ownership Plans Within Asymmetric Information, Insider Ownership, And Insider Trading Frameworks., David Alan Deboeuf

LSU Historical Dissertations and Theses

This dissertation examines the effects of employee stock ownership plans (ESOPs) on shareholder wealth, corporate control, and insider trading. In the first of three essays, a revision of the asymmetric information hypothesis is applied to the securities issuance structure of the ESOP to provide an explanation of the ESOP announcement's effect on shareholder wealth. Essay two examines the effects of the firm's (and its state of incorporation's) supermajority provisions, level of pre- and post-announcement managerial voting power, and takeover "attractiveness" on the announcement-day reaction. The final essay examines the managers' insider trading activities around the announcement of the ESOP. The …

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Text And Context Of The Suwo': Bribri Oral Tradition., Carla Victoria Jara Jan 1995

Text And Context Of The Suwo': Bribri Oral Tradition., Carla Victoria Jara

LSU Historical Dissertations and Theses

This dissertation comprises the analysis of six extensive texts in Bribri, a Chibchan language spoken in Costa Rica, Central America. The theoretical framework is based mainly on M.A.K. Halliday and Ruqaiya Hasan's social-semiotic perspective of text analysis and on Joseph Grimes' analysis of discourse. In order to characterize this genre within its context of discourse, the three components of context, i.e., field, tenor and mode, have been defined for the corpus of texts. To determine how texture and structure, the basic properties of text, are displayed, one text is analyzed in detail and the results are compared with the other …

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Molecular Cloning, Sequencing, And Regulation Of The Rhodobacter Capsulatushemb Gene., Karl Joseph Indest Jan 1995

Molecular Cloning, Sequencing, And Regulation Of The Rhodobacter Capsulatushemb Gene., Karl Joseph Indest

LSU Historical Dissertations and Theses

The common tetrapyrrole pathway in the photosynthetic bacterium, Rhodobacter capsulatus, is responsible for the synthesis of bacteriochlorophyll, heme, vitamin B-12, and siroheme. The common portion of this pathway is regulated up to 100-fold by changes in oxygen tension. This regulation is accomplished by controlling the intracellular level of porphobilinogen. One way in which porphobilinogen levels could be controlled is by regulating the synthesis of porphobilinogen. Porphobilinogen synthase, encoded by the hemB gene, is the second enzyme in the common tetrapyrrole pathway that catalyzes the dimerization of 5-aminolevulinic acid to form the monopyrrole porphobilinogen. In order to further investigate the mechanism …

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Sediment Retention In A Bottomland Hardwood Wetland In Eastern Arkansas., Barbara A. Kleiss Jan 1995

Sediment Retention In A Bottomland Hardwood Wetland In Eastern Arkansas., Barbara A. Kleiss

LSU Historical Dissertations and Theses

One of the often-stated functions of wetlands is their ability to remove sediments and other particulates from water, thus improving water quality in the adjacent aquatic system. However, actual rates of suspended sediment removal have rarely been measured in freshwater wetland systems. To address this issue, suspended sediment dynamics were measured in a 85-km$\sp2$ bottomland hardwood (BLH) wetland adjacent to the highly turbid Cache River in eastern Arkansas during the 1988-90 water years. A suspended sediment mass balance was calculated using depth-integrated, flow-weighted daily measurements at wetland inflow and outflow points. Over the three year period, suspended sediment load decreased …

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Phase Space Structures In Chaotic Quantum Dynamics., Barbara Smetana Helmkamp Jan 1995

Phase Space Structures In Chaotic Quantum Dynamics., Barbara Smetana Helmkamp

LSU Historical Dissertations and Theses

I compare the quantum and classical dynamics of a particle moving in a cosine potential while subject to a time-dependent force. I concentrate here on the behavior of an initially well-localized wave packet at times before the classically chaotic motion is fully developed. I find that the quantum and classical dynamics are indistinguishable well beyond the Ehrenfest time where the wave packet delocalizes. The quantum and classical descriptions first differ precisely when the classical probability density is folded in the vicinity of a hyperbolic fixed point. At this point, the wave function acquires a nodal structure which I show to …

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A Study Of The Stress Corrosion Crack Initiation Stage In Alpha-Brass., Kun Lian Jan 1995

A Study Of The Stress Corrosion Crack Initiation Stage In Alpha-Brass., Kun Lian

LSU Historical Dissertations and Theses

The objective of the present work was to provide an insight to the nucleation and evolution of deformation patterns occurring during transgranular stress corrosion cracking (TGSCC) and produce new alternatives for addressing the nature of the embrittlement process. Flat, tensile $\alpha$-brass (72Cu-28Zn) specimens were tested in 5 M NH$\sb4$OH, 0.1 M CuSO$\sb4$ and 1 M NaNO$\sb2$ solutions at a strain rate of $1\times 10\sp{-5}$ s$\sp{-1}.$ Slip band spacing (SBS) and slip band heights (SBH) were measured as a function of strain by conducting interrupted experiments in the SCC environments and were compared with those developed during laboratory air experiments. The …

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Combinatorial Design And Analysis Of Optimal Multiple Bus Systems For Parallel Algorithms., Priyalal D. Kulasinghe Jan 1995

Combinatorial Design And Analysis Of Optimal Multiple Bus Systems For Parallel Algorithms., Priyalal D. Kulasinghe

LSU Historical Dissertations and Theses

This dissertation develops a formal and systematic methodology for designing optimal, synchronous multiple bus systems (MBSs) realizing given (classes of) parallel algorithms. Our approach utilizes graph and group theoretic concepts to develop the necessary model and procedural tools. By partitioning the vertex set of the graphical representation CFG of the algorithm, we extract a set of interconnection functions that represents the interprocessor communication requirement of the algorithm. We prove that the optimal partitioning problem is NP-Hard. However, we show how to obtain polynomial time solutions by exploiting certain regularities present in many well-behaved parallel algorithms. The extracted set of interconnection …

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Synthesis Of Benz(F)Tryptophan And Constrained Amino Acid Derivatives As Fluorescence Probes., Guillermo Morales Jan 1995

Synthesis Of Benz(F)Tryptophan And Constrained Amino Acid Derivatives As Fluorescence Probes., Guillermo Morales

LSU Historical Dissertations and Theses

Constrained amino acids and benzannulated analogs of indole were synthesized as potential fluorescence probes of peptide structure. 1-Amino-2-(3-indolyl)-cyclohexane-1-carboxylic acid (W3) is a rotationally-restricted tryptophan analog whose C$\sb\alpha$-C$\sb\beta$ bond is part of a 6-membered ring. Friedel-Crafts reaction between $\alpha$-hydroxycyclohexanone and indole affords 2-(3-indolyl)cyclohexanone which is further converted into its corresponding spirohydantoin derivative via Strecker reaction. Basic hydrolysis of this hydantoin derivative with Ba(OH)$\sb2$ in oxygen-free water at 250$\sp\circ$C in a Parr$\sp\circler$ high pressure bomb afforded the constrained tryptophan analog. N-(t-Boc)piperidine-4-amino-4-carboxylic acid is a constrained Aib analog. Treatment of 4-piperidinone monohydrate hydrochloide with triethyl amine, catalytic amounts of N,N-dimethylamino pyridine and di-tert-butyl …

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Theoretical Studies Of Sodium Metal Clusters., Melissa R. Prince Jan 1995

Theoretical Studies Of Sodium Metal Clusters., Melissa R. Prince

LSU Historical Dissertations and Theses

Theoretical methods were used to study small sodium metal clusters. The goal was to find a simple way to model the electronic structure in these clusters that can be used to study large sodium clusters. Monte Carlo studies using Feynman's path integral formulation of quantum mechanics with Bose-Einstein statistics were used to study sodium metal clusters whose valence electrons with opposite spins were paired as bosons. Next, non-atom-based Gaussian s orbitals were used in a Hartree-Fock Monte Carlo procedure. Based on these results, standard quantum chemistry programs were used to test the utility of using non-atom-based basis sets made up …

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Elucidation And Modulation Of Ceb Metabolism In Fischer 344 Rats: Possible Mechanisms Of Toxicity And Anticarcinogenicity., Judith Sara Prescott-Mathews Jan 1995

Elucidation And Modulation Of Ceb Metabolism In Fischer 344 Rats: Possible Mechanisms Of Toxicity And Anticarcinogenicity., Judith Sara Prescott-Mathews

LSU Historical Dissertations and Theses

The ability of acivicin (AT-125), probenecid, and aminooxyacetic acid (AOAA), to ameliorate 1-cyano-3,4-epithiobutane (CEB)-induced nephrotoxicity and karyomegaly was evaluated by histopathology and histomorphometry. Epithelial cell necrosis and karyomegaly were observed in the renal proximal tubules at 24 and 48 hours in all of the treated groups with the exception of AOAA pretreated rats at 24 hours. A predominant urinary metabolite of CEB was identified as the mercapturate, N-acetyl-S-(4-cyano-2-thio-1-butyl)-cysteine. Evidence of other urinary metabolites was also demonstrated. The influence of inhibitors on the GSH-enhancing effect of CEB was determined through measurement of tissue GSH levels and $\gamma$-glutamyl-cysteine synthetase (GCS) activity. Hepatic …

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The Association Between Anticyclonic Weather Changes Over The Central Gulf Coast And Large-Scale Circulation Changes., Robert V. Rohli Jan 1995

The Association Between Anticyclonic Weather Changes Over The Central Gulf Coast And Large-Scale Circulation Changes., Robert V. Rohli

LSU Historical Dissertations and Theses

Trends in winter extratropical anticyclonic weather type frequencies (1961-1989) were examined for New Orleans, Louisiana, in order to identify the effects of global climatic change on regional-scale circulation changes over the central Gulf Coast. The number of days dominated by surface continental anticyclones (CH days) was found to have decreased significantly over time, while Pacific anticyclone (PH) frequency showed significant temporal increase. Therefore, 50 kPa geopotential height variability, 50 kPa geostrophic flow, and surface atmospheric variables were examined to determine whether changes in these features have accompanied the frequency changes in weather types. Prior to PH days, areas of greatest …

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The Effects Of Assessor And Assessee Gender, Ethnicity, And Assessor's Role On Performance Assessment Of Teachers., Shana Lewitt Schuyten Jan 1995

The Effects Of Assessor And Assessee Gender, Ethnicity, And Assessor's Role On Performance Assessment Of Teachers., Shana Lewitt Schuyten

LSU Historical Dissertations and Theses

Two studies were conducted as part of this research effort. The purpose of these studies was to determine the effects of assessor and assessee gender, ethnicity, and assessment role on performance observation ratings. Study I was Causal Comparative in nature and involved analyzing actual performance observation ratings received on the Louisiana Teacher Assessment Instruments (LTAl). Study II was an experimental study and involved analyzing experimentally manipulated, teacher-performance-observation ratings received on an instrument entitled "Survey of Effective Teaching Behavior." The data were collected in the spring of 1995 and expand upon the findings of Study I. There were essentially three different …

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The Contextual Interference Effect In Learning Parameters Of The Generalized Motor Program., Hiroshi Sekiya Jan 1995

The Contextual Interference Effect In Learning Parameters Of The Generalized Motor Program., Hiroshi Sekiya

LSU Historical Dissertations and Theses

Four experiments examined the generalizability of the contextual interference (CI) effect. In all experiments, to examine the locus of the CI effect measures assessing generalized motor program (GMP) learning and parameter learning were used in addition to a measure of general performance. In the first two experiments, variations of a timing tapping task, which were controlled by either different GMPs (Experiment 1) or the same GMP (Experiment 2), were learned under either blocked (low CI) or serial (high CI) practice. The CI effect was found for the general performance measure regardless of the task characteristics, contrary to Magill and Hall's …

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X-Ray Absorption And Electron Paramagnetic Resonance Studies Of Azotobacter Vinelandii Nitrogenase., Roland Carroll Tittsworth Jan 1995

X-Ray Absorption And Electron Paramagnetic Resonance Studies Of Azotobacter Vinelandii Nitrogenase., Roland Carroll Tittsworth

LSU Historical Dissertations and Theses

Fe K-edge Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy was used to investigate the metal-cluster structure of both the Mo-containing (Av1) and V-containing (Av1$\sp\prime$) nitrogenase component 1 proteins of Azotobacter vinelandii in their as-isolated and thionine-oxidized states. Using the EXAFS data, plausible distance assignments were made for the cofactor clusters. It was shown that small but consistent distance changes occur in both Av1 and Av1$\sp\prime$ upon thionine oxidation. Furthermore, the EXAFS of Av1$\sp\prime$ is very similar to that of Av1, supporting the proposal that the two proteins have homologous metal cluster structures. Fe K-edge and Mo K-edge EXAFS were used …

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Howell Cobb Of Georgia, A Biography., Randy L. Reid Jan 1995

Howell Cobb Of Georgia, A Biography., Randy L. Reid

LSU Historical Dissertations and Theses

Throughout his political career in the middle decades of the nineteenth century, Howell Cobb of Georgia (1815-1868) struggled to reconcile southern rights--particularly regarding slavery--with the continued existence of a national Union. As a member of the House of Representatives during the 1840s, as Speaker of the House in 1850-1851, as governor of Georgia from 1851-1853, and as secretary of the treasury from 1857-1860, he consistently advocated a pro-Union policy of compromise in times of sectional controversy. In pursuit of his moderate policy, Cobb never hesitated to confront extreme southern state-rights men with the same vigor that he directed toward northern …

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Interaural Discrimination And Localization Of Cross-Frequency Stimuli In Normal-Hearing And Impaired-Hearing Listeners., Laura K. Smith Jan 1995

Interaural Discrimination And Localization Of Cross-Frequency Stimuli In Normal-Hearing And Impaired-Hearing Listeners., Laura K. Smith

LSU Historical Dissertations and Theses

The ability to discriminate interaural differences in complex signal and to localize those signals was examined in listeners with normal hearing (NH) and with bilateral high frequency sensorineural hearing impairment (IH). Just noticeable differences for interaural time and intensity were obtained using 1/3-octave narrow band noise (NBN) stimuli centered at 500 and 4000 Hz in three conditions: (1) the NBNs played in isolation; (2) the NBNs played simultaneously with congruent interaural information across frequency; and (3) the NBNs played simultaneously with either the 500 Hz band dichotic and the 4000 Hz band diotic (a) or the 500 Hz band diotic …

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Boal And Theatre Of The Oppressed: A Performance-Centered Inquiry Of Eating And Body Image., Leigh Anne Howard Jan 1995

Boal And Theatre Of The Oppressed: A Performance-Centered Inquiry Of Eating And Body Image., Leigh Anne Howard

LSU Historical Dissertations and Theses

Building upon the scholarly tradition that performance is a valuable pedagogical tool, I documented how six performers developed personal awareness, critical consciousness, and the ability to take action as a result of participating in a performance process. I designed a three-stage performance process. During the first phase of the process, focus group discussions, participants exhibited little awareness of their specific eating habits or the cultural constructedness of those habits. As they completed the first phase, they became more aware of their behaviors, and they began to identify food's social function. At the second stage, rehearsal sessions, six performers began to …

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Changes Of Amylases And Carbohydrates In Sweetpotatoes During Storage And Their Effects On Viscosity Of Sweetpotato Puree., Xiangyong Liu Jan 1995

Changes Of Amylases And Carbohydrates In Sweetpotatoes During Storage And Their Effects On Viscosity Of Sweetpotato Puree., Xiangyong Liu

LSU Historical Dissertations and Theses

A critical problem associated with the production of sweetpotato puree is the inconsistency of final product. Two possible factors, amylase activity and carbohydrate content in sweetpotatoes during storage, were investigated. It was found that $\alpha$- and $\beta$-amylase activities do not significantly change during storage, and have no significant effects on viscosity of sweetpotato puree. The inconsistent products in sweetpotato puree processing are mostly due to the change of alcohol insoluble solids (AIS) in sweetpotatoes during storage. The decrease of AIS is partially due to respiration that converts starch into CO$\sb2$ and H$\sb2$O. A new bio-processing method was proposed to improve …

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Press Framing Of Presidential Crisis Rhetoric In A Post-Cold War World: The Haitian Crisis In 1993., Jim Andrew Kuypers Jan 1995

Press Framing Of Presidential Crisis Rhetoric In A Post-Cold War World: The Haitian Crisis In 1993., Jim Andrew Kuypers

LSU Historical Dissertations and Theses

This study employs a historical/critical approach to analyze the response of the Clinton Administration to the Haiti situation during 1993. The relationship between contemporary presidential crisis communication and the agenda-setting and agenda-extension functions of the press is especially considered. Specifically, this study employs a frame analysis which compares the frame generated by the Clinton Administration with that used by the press, represented by New York Times and the Washington Post. The importance of this study lies in its timeliness; President Clinton is the first atomic-age President not to have the Cold War meta-narrative to use in legitimating international crises. Prior …

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The Rabbit Muscle Phosphofructokinase Gene: Six Types Ofmrnas Are Tissue-Specifically Expressed By Multiple Promoters And Alternative Splicing., Shouhua Xiao Jan 1995

The Rabbit Muscle Phosphofructokinase Gene: Six Types Ofmrnas Are Tissue-Specifically Expressed By Multiple Promoters And Alternative Splicing., Shouhua Xiao

LSU Historical Dissertations and Theses

Phosphofructokinase (ATP:Fructose-6-phosphate 1-phospho-transferase, EC 2.7.1.11, PFK) catalyzes the phosphorylation of fructose 6-phosphate to generate fructose 1,6-bisphosphate, the rate-limiting step of glycolytic pathway. Li et al. (1990) have identified two cDNAs for the rabbit muscle PFK with an identical coding regions but different 5$\sp\prime$ untranslated regions (UTRs). In this dissertation research, six cDNAs for the rabbit muscle PFK mRNAs were cloned. These cDNAs are different in their 5$\sp\prime$ UTRs but have an identical open reading frame. The transcription initiation sites of two downstream promoters of this gene have been determined. A proximal promoter (Pa) is TATA-less and 86 bp upstream of …

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