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

Digital Commons Network™

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

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 6871 - 6900 of 8029

Full-Text Articles in Entire DC Network

Louisiana Agriculture Magazine, Fall 1995, Lsu Agricultural Experiment Station Oct 1995

Louisiana Agriculture Magazine, Fall 1995, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Go to article

The Educational Value Of 4-H Activities As Perceived By Louisiana 4-H Agents, Lanette Griffin Aug 1995

The Educational Value Of 4-H Activities As Perceived By Louisiana 4-H Agents, Lanette Griffin

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine the educational value of 4-H activities as perceived by Louisiana 4-H agents. Data were obtained by a researcher designed survey completed by 91 4-H agents during the 1994 Louisiana Cooperative Extension Service’s annual conference. The data showed the 4-H camp was the highest rated educational activity and it was the only activity perceived as having a very high educational value. Twenty activities were rated as high in educational value, 25 as moderate in educational value, and four items as low in educational value. Agents were also asked to estimate the number …

Go to article

Louisiana Agriculture Magazine, Summer 1995, Lsu Agricultural Experiment Station Jul 1995

Louisiana Agriculture Magazine, Summer 1995, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Go to article

Louisiana Agriculture Magazine, Spring 1995, Lsu Agricultural Experiment Station Apr 1995

Louisiana Agriculture Magazine, Spring 1995, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Go to article

Gumbo Yearbook, Class Of 1995, Louisiana State University And Agricultural And Mechanical College Jan 1995

Gumbo Yearbook, Class Of 1995, Louisiana State University And Agricultural And Mechanical College

Gumbo Yearbook

The Gumbo yearbook chronicles the entire academic year at LSU. In words and especially photos, the Gumbo shows the people, places, and events that make each year unique. In addition to formal portraits of schools and departments, the book contains hundreds of snapshots of students with their friends and dozens of pages showcasing organizations.

Go to article

Rhetoricizing Habermas: The Restoration Of Legitimacy As A Theme In The 1992 Televised Presidential Debates., Kevin Travis Jones Jan 1995

Rhetoricizing Habermas: The Restoration Of Legitimacy As A Theme In The 1992 Televised Presidential Debates., Kevin Travis Jones

LSU Historical Dissertations and Theses

During the past twenty years, scholars have posited the emergence of a legitimacy crisis in the American political system. Symptoms of the crisis were low voter turn out and a culture of withdrawal, cynicism, alienation, and a widespread perception of institutional incompetence and indifference. At the very least, the widespread mood of apathy and decline have been seized upon by various candidates seeking political office, in particular the presidency, who routinely engage in discourse targeting legitimacy restoration. This discourse echoed the general theme of the Jeffersonian Myth. This myth, which predates Jefferson in its old Roman roots, targets the citizen …

Go to article

Solution Behavior Of Cascade Polymers., Keunok Han Yu Jan 1995

Solution Behavior Of Cascade Polymers., Keunok Han Yu

LSU Historical Dissertations and Theses

This thesis consists of four chapters. In the first, a general introduction is presented. Chapter 2 deals with the characterization of polyamidoamine (PAMAM) cascade polymers. Diffusion coefficients of four different generations (generation 3, 5, 7, and 9) of PAMAMs were measured in aqueous solutions by dynamic light scattering. Generation 3 and 5 were characterized again, after labeling with fluorescein isothiocyanate, by fluorescence photobleaching recovery. The dynamic light scattering results depended on the concentration of added salt in the low salt limit, while the fluorescence values were almost independent of salt concentration. The polyelectrolyte effects, or solution nonidealities, strongly affected light …

Go to article

Diallel Analyses Of Percent Kernel Infection By Aspergillus Flavus And Ear Moisture Loss Rate In Maize., Yudong Zhang Jan 1995

Diallel Analyses Of Percent Kernel Infection By Aspergillus Flavus And Ear Moisture Loss Rate In Maize., Yudong Zhang

LSU Historical Dissertations and Theses

Preharvest infection by Aspergillus flavus Link ex Fries and subsequent aflatoxin contamination of maize (Zea mays L.) grain are major production problems. Ear moisture loss rate (EMLR) is an important component of hybrid performance and maturity, and to some extent determines the suitability of a hybrid for a geographical area. A 10-parent diallel experiment was conducted in 1992 and 1994 to study the genetic nature of both percent kernel infection (PKI) by A. flavus and EMLR. General combining ability (GCA, V$\sb{\rm g}$), specific combining ability (SCA, V$\rm\sb{s}$), and reciprocal mean squares for PKI were significant. The ratio $\rm 2V\sb{g}/(2V\sb{g}+V\sb{s}$) was …

Go to article

The Dual Voices Of The Civil Rights Movement: The Heroic Narratives Of Martin Luther King, Jr. And Malcolm X., Kerry Paul Owens Jan 1995

The Dual Voices Of The Civil Rights Movement: The Heroic Narratives Of Martin Luther King, Jr. And Malcolm X., Kerry Paul Owens

LSU Historical Dissertations and Theses

Since reconstruction African-American leaders have embodied conflicting aspirations. While some leaders like Booker T. Washington and Frederick Douglass urged complete assimilation, others like W. E. B. DuBois and Marcus Garvey have preached autonomy and separation. These leaders have tended to serve as icons for rival programs; their rhetoric as authoritative, and their lives as inspired models for future leaders. This dissertation examines the hagiography of the two most famous leaders of the late 20th century, Martin Luther King, Jr. and Malcolm X. It argues that their rhetoric was undergirded by the myth of the heroic quest and that their lives …

Go to article

Modeling The Antecedents Of Compulsive Buying., Leslie K. Cole Jan 1995

Modeling The Antecedents Of Compulsive Buying., Leslie K. Cole

LSU Historical Dissertations and Theses

Interest in dysfunctional consumption behaviors, such as compulsive buying, is a fairly recent development in the marketing literature. The purpose of this dissertation was to develop and test a theoretical model of the structural relationships among potential antecedents of compulsive buying behavior. In this dissertation, an extensive literature review identified several key constructs in the development of compulsive buying. These constructs include a family environment factor (parental influence), obsessive-compulsive trait, trait self-esteem, generalized anxiety, impulsive behavior, and anxiety reduction through shopping motivations. Seven studies were performed, including pretest and final studies with national non-student samples. Using LISREL, a structural model …

Go to article

Wiretapping And National Security: Nixon, The Mitchell Doctrine, And The White Panthers. Volume I., Jeff A. Hale Jan 1995

Wiretapping And National Security: Nixon, The Mitchell Doctrine, And The White Panthers. Volume I., Jeff A. Hale

LSU Historical Dissertations and Theses

This dissertation discusses a modern version of a constitutional struggle which has characterized American democracy since the first days of the Republic: the citizen's right to privacy versus the Government's need to guarantee "national security." It addresses the Supreme Court's landmark Fourth Amendment wiretapping decision of June 1972, U.S. v. U.S. District Court, which ruled unconstitutional the so-called "Mitchell Doctrine", the Nixon Administration's attempt to gain Judicial sanction for "national security" wiretaps without prior court order of suspected "domestic subversive" groups. In its unanimous Keith decision, the Court upheld the "primacy of warrants" in domestic intelligence investigations. Keith remains the …

Go to article

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 …

Go to article

A Comparison Of Preference Responses Of White And African-American Students To Musical Versus Musical/Visual Stimuli And Their Relationship To Same- And Other Group Attitudes., Steven Joseph Morrison Jan 1995

A Comparison Of Preference Responses Of White And African-American Students To Musical Versus Musical/Visual Stimuli And Their Relationship To Same- And Other Group Attitudes., Steven Joseph Morrison

LSU Historical Dissertations and Theses

It was the purpose of this study to examine the role of same- and other-group identification in musical preference decision-making and the relationship between preference decisions and attitude-oriented responses to hypothetical social encounters with same- and other-group members. Subjects were African-American (n = 189) and white (n = 280) sixth, seventh and eighth grade music students. To measure musical preference, each subject responded along a 9-point Likert scale to 10 instrumental music excerpts, five performed by African-American jazz artists and five performed by white jazz artists. The examples were presented according to one of three conditions: (1) music only, (2) …

Go to article

Host-Guest Chemistry Of Cofacial Binuclear Copper(Ii) And Zinc(Ii) Complexes Of Bis(Beta-Diketone) Ligands., Laurie A. Brown Jan 1995

Host-Guest Chemistry Of Cofacial Binuclear Copper(Ii) And Zinc(Ii) Complexes Of Bis(Beta-Diketone) Ligands., Laurie A. Brown

LSU Historical Dissertations and Theses

We have been synthesizing cofacial binuclear copper(II) and zinc(II) complexes using bis($\beta$-diketone) ligands in order to design a host complex which selectively binds guest molecules and demonstrates catalytic activity. The metal atoms are held by the chelating acetylacetonate groups, of the bis($\beta$-diketone) ligands, in adjacent parallel planes separated by a cavity into which the guest molecule fits. The host-guest interactions are described. The synthesis of these complexes are discussed beginning with the synthesis of the substituted naphthalenes which bridge the meta-acetylacetonate planes. We needed 2,7-dimethylnaphthalene-1-carbonitrile for the synthesis of the bis($\beta$-diketone) ligand, NBAH$\sb2$-1-CN. After the first recrystallization of 2,7-dimethylnaphthalene-1-carbonitrile, it …

Go to article

The Regulation Of Carbonic Anhydrase And Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Activase By Light And Co2 In Chlamydomonas Reinhardtii, Mamta Rawat, James V. Moroney Jan 1995

The Regulation Of Carbonic Anhydrase And Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Activase By Light And Co2 In Chlamydomonas Reinhardtii, Mamta Rawat, James V. Moroney

Faculty Publications

We have investigated the regulation of accumulation of ribulose1,5-bisphosphate carboxylase/oxygenase activase and the periplasmic carbonic anhydrase (CA) in Chlamydomonas reinhardtii. In algae, the periplasmic CA is required for efficient CO2 fixation when the CO2 concentration is low. These two proteins are affected differently by the CO2 level in the environment. The steady-state level of the ribulose-1,5-bisphosphate carboxylase/oxygenase activase transcript was only slightly and transiently affected by a reduction in ambient CO2 concentration, whereas the CA transcript level was strongly induced by air containing ambient (350 parts per million) CO2 (low CO2) conditions. The transcripts for both proteins showed strong oscillations …

Go to article

Aerobic And Anaerobic Starvation Metabolism In Methanotrophic Bacteria, P. Roslev, G. M. King Jan 1995

Aerobic And Anaerobic Starvation Metabolism In Methanotrophic Bacteria, P. Roslev, G. M. King

Faculty Publications

The capacity for anaerobic metabolism of endogenous and selected exogenous substrates in carbon- and energy-starved methanotrophic bacteria was examined. The methanotrophic isolate strain WP 12 survived extended starvation under anoxic conditions while metabolizing 10-fold less endogenous substrate than did parallel cultures starved under oxic conditions. During aerobic starvation, the cell biomass decreased by 25% and protein and lipids were the preferred endogenous substrates. Aerobic protein degradation (24% of total protein) took place almost exclusively during the initial 24 h of starvation. Metabolized carbon was recovered mainly as CO2 during aerobic starvation. In contrast, cell biomass decreased by only 2.4% during …

Go to article

Effects Of Inoculation And Wilting On The Preservation And Utilization Of Wheat Forage, C. C. Williams, M. A. Froetschel, L. O. Ely, H. E. Amos Jan 1995

Effects Of Inoculation And Wilting On The Preservation And Utilization Of Wheat Forage, C. C. Williams, M. A. Froetschel, L. O. Ely, H. E. Amos

Faculty Publications

Wheat forage was harvested at an early head stage of maturity and ensiled in 12 900-kg experimental silos at three percentages of DM (20.8% for direct-cut forage and 27.9 or 39.3% for wilted forage) either with or without application of a lactic acid bacterial inoculant. The objective was to test the efficacy of the inoculant to alter silage fermentation, preservation, and nutritive value of wheat forage ensiled at different moisture percentages because of wilting. Wilting enhanced DM preservation and decreased fermentation end products. Inoculation made the fermentation more homolactic but did not enhance DM preservation. Silage rations (80% DM as …

Go to article

Effects Of Inoculation And Wilting On The Preservation And Utilization Of Wheat Forage, C. C. Williams, M. A. Froetschel, L. O. Ely, H. E. Amos Jan 1995

Effects Of Inoculation And Wilting On The Preservation And Utilization Of Wheat Forage, C. C. Williams, M. A. Froetschel, L. O. Ely, H. E. Amos

Faculty Publications

Wheat forage was harvested at an early head stage of maturity and ensiled in 12 900-kg experimental silos at three percentages of DM (20.8% for direct-cut forage and 27.9 or 39.3% for wilted forage) either with or without application of a lactic acid bacterial inoculant. The objective was to test the efficacy of the inoculant to alter silage fermentation, preservation, and nutritive value of wheat forage ensiled at different moisture percentages because of wilting. Wilting enhanced DM preservation and decreased fermentation end products. Inoculation made the fermentation more homolactic but did not enhance DM preservation. Silage rations (80% DM as …

Go to article

Elementos Sobrenaturales En Las Diez Comedias De Cervantes., Sara M. Lavastida Jan 1995

Elementos Sobrenaturales En Las Diez Comedias De Cervantes., Sara M. Lavastida

LSU Historical Dissertations and Theses

This dissertation studies the supernatural elements in Cervantes' comedies. There have been studies in the past, like the dissertation of Linton Lomas Barrett and the dissertation of Mary Lewis Dewey Weaver, that deal with some themes similar to this dissertation. The dissertation of Barrett deals only with the supernatural elements in La Numancia, and the dissertation of Dewey Weaver only studies the presence of magic and witchcraft in some of the narrative prose works by Cervantes. This dissertation not only deals with magic and witchcraft but also the supernatural elements that are present in the ten comedies, such as fate, …

Go to article

Development Of A Femtosecond Time-Resolved Raman Spectrometer For Hemoglobin Studies., Junbo Chen Jan 1995

Development Of A Femtosecond Time-Resolved Raman Spectrometer For Hemoglobin Studies., Junbo Chen

LSU Historical Dissertations and Theses

A femtosecond time-resolved Raman spectrometer is developed to study the ultrafast dynamics of hemoprotein. The laser system consists of a dye laser synchronously pumped by the SHG of compressed ML Nd:YAG laser pulse, and a Ti:sapphire regenerative amplifier using chirped-pulse-amplification technique. The laser system provides 350 fs pulses output with 0.4 mJ/pulse energy at the repetition rate of 1 kHz. The tunability covers the whole Ti:sapphire lasing range with the use of different laser dye. Femtosecond time-resolved resonance Raman experiment shows that the ligand photodissociation quantum yield depends on the nature of ligand. With three ligands studied, CO has about …

Go to article

A Cross-Case Analysis Of Middle School Reading Teachers' Theoretical Orientations As They Relate To Classroom Practices., Shirley Theriot Fogleman Jan 1995

A Cross-Case Analysis Of Middle School Reading Teachers' Theoretical Orientations As They Relate To Classroom Practices., Shirley Theriot Fogleman

LSU Historical Dissertations and Theses

Each interaction between teachers and students is a reflection of the theory that these professionals, sometimes unknowingly, posit about what should be occurring in their classrooms. The purpose of this study is to explore the differences between middle school language arts teachers' beliefs about how children actually read a text, and how these teachers translate these beliefs into classroom practices. The beliefs we hold about reading comprehension are essential to our understanding about how we should instruct and assess our students in our classes. Leu and Kinzer (1988) refer to two beliefs' frameworks of comprehension in reading, based on the …

Go to article

Synthesis And Characterization Of Aminoalkylcarbamoyl Cellulosics., Doris Ann Culberson Jan 1995

Synthesis And Characterization Of Aminoalkylcarbamoyl Cellulosics., Doris Ann Culberson

LSU Historical Dissertations and Theses

The synthesis and characterization of chitin analogs based on water soluble amino cellulose derivatives are described. This family of derivatives exhibits properties suitable for applications as biodegradable carriers for pharmacons and agricultural chemicals, and production of high molecular weight polymeric quaternary salts. The chemical and physical properties of the group of amino cellulose derivatives prepared from the amidation of methyl carboxymethyl cellulose or the aminolysis of cyanoethylated cellulose with different diamines are analyzed. Converting the carboxy-methyl cellulose to a methyl ester produces a derivative more receptive to amidation. When the methyl carboxyl-methyl cellulose is treated with an excess of diamines, …

Go to article

Daily Variations In Protein Synthesis And Tissue Responsiveness To Growth Hormone, Prolactin And Insulin-Like Growth Factor-I In The Gulf Killifish, Fundulus Grandis Baird And Girard., Zeleke Negatu Jan 1995

Daily Variations In Protein Synthesis And Tissue Responsiveness To Growth Hormone, Prolactin And Insulin-Like Growth Factor-I In The Gulf Killifish, Fundulus Grandis Baird And Girard., Zeleke Negatu

LSU Historical Dissertations and Theses

Circadian variations of $\sp{14}$C-glycine incorporation into protein and the responsiveness of muscle tissue to growth hormone, prolactin and insulin-like growth factor-I were examined in gulf killifish, Fundulus grandis. Incorporation of label during a 5 h period following $\sp{14}$C-glycine injection was tested at different times of day (LD 12:12). Incorporation varied during the day in all the tissues examined (scale, muscle, liver and intestine). The times of peak incorporations differed among the tissues. Scales showed peak incorporation during the dark hours. Peak incorporation by muscle occurred at the onset of light. These patterns were similar in male and female fish. The …

Go to article

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 …

Go to article

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 …

Go to article

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 $(\alpha\sb\beta\sb2)$ …

Go to article

The Effect Of Structured Task Presentations And Reinforcement On Attention, Achievement, And Attitude Of Selected High School Choirs., Dwayne E. Dunn Jan 1995

The Effect Of Structured Task Presentations And Reinforcement On Attention, Achievement, And Attitude Of Selected High School Choirs., Dwayne E. Dunn

LSU Historical Dissertations and Theses

This study nested a behavioral design within an experimental design to observe performance improvement after structuring the presentation of musical academic tasks, and to examine the effect of teacher reinforcement on student attentiveness, musical achievement, and attitude in choral ensembles. Two high school choral music classes (N = 60) were assigned intact to one of two treatments. The No Feedback Group (n = 29) received task presentations and directions followed by student performance and no verbal/facial teacher reinforcement. The Feedback Group (n = 31) received task presentations, directions, student performance, and teacher reinforcement. Three similar choral music excerpts were edited …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

First Prev Next Last