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N-Acylethanolamines and Plant Phospholipase D
Recently, three distinct isoforms of phospholipase D (PLD) were identified in Arabidopsis thaliana. PLD α represents the well-known form found in plants, while PLD β and γ have been only recently discovered (Pappan et al., 1997b; Qin et al., 1997). These isoforms differ in substrate selectivity and cofactors required for activity. Here, I report that PLD β and γ isoforms were active toward N-acylphosphatidylethanolamine (NAPE), but PLD α was not. The ability of PLD β and γ to hydrolyze NAPE marks a key difference from PLD α. N-acylethanolamines (NAE), the hydrolytic products of NAPE by PLD β and γ, inhibited PLD α from castor bean and cabbage. Inhibition of PLD α by NAE was dose-dependent and inversely proportional to acyl chain length and degree of unsaturation. Enzyme kinetic analysis suggested non-competitive inhibition of PLD α by NAE 14:0. In addition, a 1.2-kb tobacco (Nicotiana tabacum L.) cDNA fragment was isolated that possessed a 74% amino acid identity to Arabidopsis PLD β indicating that this isoform is expressed in tobacco cells. Collectively, these results provide evidence for NAE producing PLD activities and suggest a possible regulatory role for NAE with respect to PLD α.
Date:
December 1998
Creator:
Brown, Shea Austin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Analysis of How Interest Groups Influence the Policy-making Process for the Individuals With Disabilities Education Act of 1997
This study examined the policy letters and verbal testimony transcripts submitted by interest groups to the United States Department of Education (USDE) in response to the proposed regulations pertaining to the implementation of the 1997 reauthorization of P. L. 105-17, Individuals with Disabilities Education Act (IDEA). Specifically, this study analyzed the emerging themes in the area of discipline. Responses were received from the following interest groups: (a) school administrators, (b) parents, (c) teachers, (d) state educational agencies (SEAs), (e) national educational organizations, and (f) members of the United States Congress. In addition to analyzing the emerging themes, the study compared these themes to ones found in the current literature and court cases.
Date:
December 1998
Creator:
Price, Laura Black
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Trust and Governance in Hybrid Relationships: An Investigation of Logistics Alliances
Transaction cost economics (TCE) theorists traditionally have classified transactions between firms as governed by either market or hierarchy. By assessing characteristics of the transaction - asset specificity, uncertainty, and frequency - firms choose the governance form which minimizes transaction costs, the costs of administering the business deal. During the 1980s, however, TCE has found itself unable to explain the proliferation of strategic alliances. These hybrid relationships seek the benefits of both markets and hierarchies, including quasi-integration, the control of assets without actual ownership. Further, hybrids tend to prefer trust-based relational contracting. TCE's acknowledgment of hybrids, however, raises other questions surrounding the behavioral assumptions which supposedly influence the transaction characteristic governance linkage. Various dissenting researchers have theorized that (1) trust is more dominant in business than opportunism (2) the behavioral assumptions actually function as variables in different contexts, and (3) trust offers an integration mechanism for behavioral variables.
Date:
December 1998
Creator:
Orr, John Patrick, 1950-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Culture and Anxiety: a Cross-Cultural Study
By measuring interactions among and between anxiety and the independent variables of country of origin, gender, level of education, and age, this study attempted to gain insight into how students from different countries experience anxiety on a U.S. college campus. Results of the Multivariate Analysis of Variance (MANOVA) and the univariate test(ANOVA) indicated that the gender and level of education of the subjects made no significant difference. However, when it came to country of origin, there were significant differences between two of the cultural groups and respective anxiety level. Findings also support a positive correlation between age and anxiety levels, with the youngest participants having the lowest anxiety levels.
Date:
December 1998
Creator:
Abbassi, Amir
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Assessment and Treatment of Multiple Topographies and Functions of Self-injury
Results of a functional analysis indicated that the self-injurious behavior (SIB) of an adult female with profound mental retardation occurred primarily in the alone and demand conditions. Graphs of the separate topographies (head slaps and head bangs) showed that head banging occurred in the alone condition and that both head banging and head slapping occurred in the demand condition. A data analysis procedure to identify within-session trends across sessions and fluctuations in rates of SIB by topography revealed that most of the demands escaped were escaped by head slaps and that over 80% of all head slaps were associated with escape, compared to less than 1%of all head bangs, indicating that head banging and head slapping were members of separate functional response classes. Treatment consisted of noncontingent availability of preferred leisure materials, and produced substantial decreases of both head banging and head slapping. Interpretation of the results are discussed, as well as some implications and limitations of the study.
Date:
December 1998
Creator:
Gonzalez, Angela M. (Angela Maria), 1970-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Natural Smooth Measures on the Leaves of the Unstable Manifold of Open Billiard Dynamical Systems
In this paper, we prove, for a certain class of open billiard dynamical systems, the existence of a family of smooth probability measures on the leaves of the dynamical system's unstable manifold. These measures describe the conditional asymptotic behavior of forward trajectories of the system. Furthermore, properties of these families are proven which are germane to the PYC programme for these systems. Strong sufficient conditions for the uniqueness of such families are given which depend upon geometric properties of the system's phase space. In particular, these results hold for a fairly nonrestrictive class of triangular configurations of scatterers.
Date:
December 1998
Creator:
Richardson, Peter A. (Peter Adolph), 1955-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Experimental Analysis of Self-injury With and Without Protective Equipment
Outcomes of experimental analyses during which protective equipment (PE) was placed on three participants were compared to those during which PE was not provided to them. Experimental analysis conditions were presented using a multielement format, and the effects of PE were evaluated using a withdrawal design. Results of experimental analysis without PE suggested that self-injurious behavior (SIB) was maintained by negative reinforcement for two participants and nonsocial mechanisms for the third participant. However, SIB was eliminated either immediately or eventually for all participants when PE was provided during experimental analysis. Thus, outcomes of assessments with PE did not match those without PE, and no conclusion about variables associated with SIB could be drawn from experimental analyses with PE alone. Therefore, the present findings do not support the use of PE as an alternative to standard methods for conducting experimental analysis (i.e., without PE).
Date:
December 1998
Creator:
Le, Duy D. (Duy Dang)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Ecological Association Between the Red-Cockaded Woodpecker and Southern Pine Beetle in the Homochitto National Forest: a Geographic Information System Approach
Since the introduction of management practices by the Forest Service to stabilize red-cockaded woodpecker (RCW) populations, the number of cavity trees killed by southern pine beetles (SPB) has increased. A model of the landscape ecology of RCW and SPB in the Homochitto National Forest was created using data collected from the Forest Service and Global Atmospherics. The conclusions of the study were that the RCW and SPB utilize the same type of habitat and the stand hazard maps are an accurate means of determining the locations of SPB infestations. The functional heterogeneity maps created for the SPB and RCW would be useful predictors of future occurrences of either species if complete data were obtained.
Date:
December 1998
Creator:
Skordinski, Karen R. (Karen Renee)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Determinants of Federal Spending for the Administration of Justice
This study develops and empirically tests a model of the determinants of federal spending for crime-fighting policies. An inter-disciplinary approach to building the model is utilized that merges ideas from budgeting, policy analysis and criminology. Four factors hypothesized to impact federal spending for the administration of justice are operationalized as eight variables and tested using ordinary least squares regression analysis on time series data. The factors hypothesized to impact federal spending in this area are economic constraints imposed on government spending, the ideological makeup of Congress and the president, the actual crime rate, and the public's attitude toward crime. Five of the eight variables demonstrated statistical significance at the.10 level or better.
Date:
December 1998
Creator:
Gabriano, Gina
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Relationship between Privatization, Culture, Adoption of International Accounting Standards, and Accounting in Egypt
This study explores how the Egyptian socioeconomic factors impacted the implementation of International Accounting Standards (IASs) in Egypt. Prior research concluded that developing nations have special needs when it comes to accounting and financial reporting and recommended nation-specific analysis. The author adapts Gray's (1988) model, which connects Hofstede's cultural dimensions with accounting practice, to fit the Egyptian environment.
Date:
December 1998
Creator:
Dahawy, Khaled M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
External Factors and Ethnic Mobilization : A Global Study of the Causes of Military Mobilization among Ethnic Groups, 1945-1995
The main purposes of this study are to elaborate on the concept of ethnic military mobilization and to identify the factors that contribute to its occurrence.
Date:
December 1998
Creator:
Nejad, Jalal K. (Jalal Komeili)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
"The Best Stuff Which the State Affords": a Portrait of the Fourteenth Texas Infantry in the Civil War
This study examines the social and economic characteristics of the men who joined the Confederate Fourteenth Texas Infantry Regiment during the Civil War and provides a narrative history of the regiment's wartime service. The men of the Fourteenth Infantry enlisted in 1862 and helped to turn back the Federal Red River Campaign in April 1864. In creating a portrait of these men, the author used traditional historical sources (letters, diaries, medical records, secondary narratives) as well as statistical data from the 1860 United States census, military service records, and state tax rolls. The thesis places the heretofore unknown story of the Fourteenth Texas Infantry within the overall body of Civil War historiography.
Date:
December 1998
Creator:
Parker, Scott Dennis
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Social Validation of Intervention Procedures for Emotionally Disturbed Students : Effects on Regular Education Students
The purpose of this study was to explore regular education student perceptions of the effects of implementing behavioral interventions for seriously emotionally disturbed students (SED) in the regular classroom. Student perceptions of classroom friction or disruptiveness, apathy, and general enjoyment or satisfaction were evaluated. It was predicted that regular education students would report more classroom friction, increased apathy, and less satisfaction when interventions were implemented in the regular classroom for a target SED student.
Date:
December 1998
Creator:
Thomson, Marty C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Comparative Study of the Impact of the Total Quality Management Program on Exit Level Texas Assessment of Academic Skills Scores
The management style being used by school personnel in Texas and across the nation today is predominately that of a bureaucracy. This model was organized around the industrial revolution that was exercising authority at the turn of the century. Writers and researchers have pointed out that such a model is not capable of providing students the knowledge and skills they will need to enter an increasingly demanding society. One management style relatively new to the educational arena today is that of Total Quality Management. This study reports the results of the impact of the training in those principles by measurement of student test scores.
Date:
December 1998
Creator:
Maulding, Wanda Smith
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Faculty Recital: 1998-12-02 - Terri Sundberg, flute
Access:
Use of this item is restricted to the UNT Community
A faculty and guest artist recital performed at the UNT College of Music Recital Hall.
Date:
December 2, 1998
Creator:
Sundberg, Terri
Object Type:
Sound
System:
The UNT Digital Library
Cloning of Carbonic Anhydrase from Cotton (Gossypium hirsutum L.)
Carbonic anhydrase is a ubiquitous zinc-metalloenzyme that catalyzes the interconversion of carbon dioxide and carbonate and has been found to play a wide range of roles in animals, plants and bacteria. Cotton genomic and cDNA libraries were screened for the plastidial isoform of carbonic anhydrase. The nucleotide sequences of two 1.2 Kb partial cDNA clones were determined. These clones exhibit high homology to carbonic anhydrases from other dicot plants and possess all the expected peptide motifs. For example, serine and threonine rich chloroplastic targeting peptide and conserved zinc binding residues are both present. These clones were utilized to isolate two carbonic anhydrase genes that were shown to encode different isoforms by PCR and RFLP analysis.
Date:
December 1998
Creator:
Local, Andrea
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Life History and Case-building Behavior of Molanna Tryphena Betten (Trichoptera: Molannidae) in Two East Texas Spring-fed Streams
The life history and case-building behavior of Molanna tryphena from two spring-fed tributaries in East Texas were studied from January 1997 to May 1998.
Date:
December 1998
Creator:
Gupta, Tammi Spackman
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Assessment of College Students' Attitudes and Empathy toward Rape
The purpose of this study was to assess rape attitudes and empathy levels of students at a university in North Texas. The Attitudes Toward Rape questionnaire and the Rape Empathy Scale were administered to 387 undergraduate students. Dependent variables were attitudes and empathy and independent variables were prior knowledge or experience as a rape victim, having female siblings, gender, marital status, and age. Significance was found between rape-intolerant attitudes and both prior experience as a victim (p < .001), and gender (p < .001). Significance was also found between empathy and experience as a rape victim (p < .035) and gender (p < .032).
Date:
December 1998
Creator:
Burke, Sloane C. (Sloane Christine)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Exploratory Investigation of the Origins and Regulatory Actions of the United Kingdom's Financial Reporting Review Panel
In 1990, the accounting profession and the British government worked together to establish a new regulatory framework for financial reporting in the United Kingdom (UK), the Financial Reporting Council (FRC) and its two subsidiaries, the Accounting Standards Board (ASB) and the Financial Reporting Review Panel (FRRP). The FRRP enforces companies' compliance with the ASB's accounting standards and the accounting provisions of the UK Companies Act. Only one study, Brandt et al. (1997), has examined the activities and effectiveness of the FRRP. This dissertation attempts to extend Brandt et. al (1997) and add to understanding of the origins and regulatory actions of the FRRP.
Date:
December 1998
Creator:
Styles, Alan K. (Alan Keith)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Using Assessment as a Method for Surfacing Tacit Knowledge to Influence Business Strategy: a Case Study
In a small, owner-managed, knowledge work firm, assessments were completed on the owners as a method to complete job analysis—surfacing tacit knowledge such as personal characteristics, cognitive style, values and philosophy that contributed to success. Business strategy is often strongly influenced by the tacit knowledge and competencies of the owners, and their unique perspective on the company and marketplace.
Date:
December 1998
Creator:
Reisenbichler, Lori J. (Lori Jenkins)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Reading of Shakespeare's Problem Plays into History: A New Historicist Interpretation of Social Crisis and Sexual Politics in Troilus and Cressida and Measure for Measure
This study is aimed to read Shakespeare's problem comedies, Troilus and Cressida and Measure for Measure into the historical and cultural context of dynamically-changing English Renaissance society at the turn of the sixteenth century. In the historical context of emerging capitalism, growing economic crisis, reformed theology, changing social hierarchy, and increasing sexual control, this study investigates the nature of complicated moral problems that the plays consistently present. The primary argument is that the serious and dark picture of human dilemma is attributed not to Shakespeare's private imagination, but to social, political, economic, and religious crises in early modern England.
Date:
December 1998
Creator:
Jin, Kwang Hyun
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Indicators of Persistence and Success of Community College Transfer Students Attending a Senior College
The purpose of the study was to determine whether age, ethnicity, gender, full-time/ part-time status, and the community college academic variables of cumulative GPA, total transferable hours, and number of completed core courses predicted students' persistence or GPA at a four-year university.
Date:
December 1998
Creator:
Underwood, Mark E. (Mark Eads)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Endogenous Constructivist Implications for Methodology : Focus on Young Children with Developmental Delay in the Social and Emotional Domains
The Ecologically-Based Activity Plan (EBAP) is proposed as a method to create a transition between special education and general education. It serves as a tool to help classroom teachers assess the environment of the class and as a method for embedding instruction within the naturally occurring context of the endogenous constructivist classroom. In this study the EBAP was used to reduce aggressive behavior and increase prosocial behavior among five children who displayed developmental delays in the social and emotional domains.
Date:
December 1998
Creator:
McCrary, Donna E. (Donna Evelyn)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Southwest Retort, Volume 51, Number 3, [December] 1998
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
December 1998
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library