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 Collection: UNT Theses and Dissertations
Proteomic Responses in the Gill of Zebrafish Following Exposure to Ibuprofen and Naproxen

Proteomic Responses in the Gill of Zebrafish Following Exposure to Ibuprofen and Naproxen

Date: August 2012
Creator: Adhikari, Prem R.
Description: Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most abundant environmental pharmaceutical contaminants. In this study, a proteomic analysis was conducted to identify proteins differentially expressed in gill tissue of zebrafish (Danio rerio) after a 14-day exposure to the NSAIDs ibuprofen or naproxen. A total of 104 proteins with altered expression as indicated by 2-dimensional electrophoresis were analyzed by liquid chromatography with ion trap mass spectrometry (MS/MS). A total of 14 proteins fulfilled our requirements for identification which included consistency among replicate gels as well as successful MS/MS ion searches with the MASCOT database. The most prominent feature of the differential protein expression observed after NSAID exposure was an up-regulation of proteins belonging to the globin family which are involved in the transport of oxygen from gills and availability of heme molecules required for synthesis of cyclooxygenase. Differential expression was observed at exposure concentrations as low as 1-10 µg/L indicating that altered gene expression may occur in fish subjected to environmentally realistic levels of NSAID exposure.
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Solvent Effects and Bioconcentration Patterns of Antimicrobial Compounds in Wetland Plants

Solvent Effects and Bioconcentration Patterns of Antimicrobial Compounds in Wetland Plants

Date: May 2011
Creator: Adhikari, Sajag
Description: This study looked at effects of organic solvents dimethylsulfoxide, dimethylformamide and acetone at 0.01%, 0.05% and 0.1% concentration on germination and seedling development wetland plants. Even at 0.01% level, all solvents affected some aspect of seed germination or seedling growth. Acetone at 0.01% was least toxic. Root morphological characteristics were most sensitive compared to shoot morphological characteristics. This study also looked at bioconcentration patterns of antimicrobial compounds triclosan, triclocarban and methyl-triclosan in wetland plants exposed to Denton Municipal Waste Water Treatment Plant effluent. Bioconcentration patterns of antimicrobial compounds varied among species within groups as well as within organs of species. The highest triclocarban, triclosan and methyltriclosan concentration were in shoot of N. guadalupensis, root of N. lutea and in shoots of P. nodous respectively.
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An analysis of job satisfaction for special educators who instruct students with emotional/behavioral disorders: How working conditions impact commitment.

An analysis of job satisfaction for special educators who instruct students with emotional/behavioral disorders: How working conditions impact commitment.

Date: August 2009
Creator: Adkins, Beverly
Description: Teachers of students with emotional/behavioral disorders (E/BD) find that myriad concerns for effective teaching (e.g., salaries, increased paperwork, classroom management) challenge their ability to meet personal and professional needs. The push for certified teachers and limited training to work with students with special needs create stressors that can prohibit effective teaching in the workplace. Teacher moral drops and half of newly hired employees leave the profession. Equally important, student outcomes are affected. Demographic information, program practices, and commitment information from special education teachers across the country were examined in this study. These areas of study helped to determine the best indicators for teacher job satisfaction and barriers that threaten satisfactory working conditions. An online survey was designed to capture 29 areas to explore qualifications and working environments for these teachers. Of the 600 targeted teachers, 332 individuals participated in Likert-like scales to determine their degree of satisfaction or dissatisfaction for working conditions, use of intervention strategies, and areas of commitment. Closed-ended and multiple-choice questions were used. Descriptive analyses and tables aided in understanding this study. The resulting factors indicated that, although some respondents pointed to job dissatisfaction within the subset of questions, participants who worked for more than 6 years ...
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A Study of the Value of Selected Curiosity Tests for Predicting Academic Achievement in First and Second-Grades

A Study of the Value of Selected Curiosity Tests for Predicting Academic Achievement in First and Second-Grades

Date: August 1970
Creator: Adkisson, Jack
Description: This investigation was concerned with the problem of determining the value of selected curiosity tests for predicting academic achievement in first and second-grades.
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Workplace Violence Prevention Training: An Analysis of Employees' Attitudes

Workplace Violence Prevention Training: An Analysis of Employees' Attitudes

Date: May 2005
Creator: Adriansen, David J.
Description: The purpose of this study was to determine employees' attitudes and perceptions toward the effectiveness of workplace violence prevention training within a U.S. Government service agency with 50 offices located in Minnesota and Wisconsin. Chapter 1 presents an overview of the phenomenon of workplace violence, the movement toward prevention programs and policies and the implementation of prescreening processes during hiring and violence prevention training. Chapter 2 contains a thorough review of pertinent literature related to violence prevention training and the impact of occupational violence on organizations. This topic was worthy of research in an effort to make a significant contribution to training literature involving organizational effectiveness due to the limited amount of research literature covering the area of corporate violence prevention training and its effect on modifying attitudes and behaviors of its customers. The primary methodology involved the assessment of 1000 employees concerning their attitudes and perceptions toward the effectiveness of workplace violence prevention training. The research population were administered a 62 item online assessment with responses being measured, assessed, and compared. Significant differences were found calling for the rejection of the three study hypotheses. Chapter 4 described the findings of the population surveyed and recommendations were identified in Chapter ...
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Question of Honor

Question of Honor

Date: May 2004
Creator: Agha, Anila Quayyum
Description: My thesis, Question of Honor, addresses the premise of women's lack of choice in relation to men's honor, and vengeance; concepts that are closely connected to the oppressive world of women in Pakistan. These works deal with concepts of purity and minor transgressions that have an impact on the lives of women in relation to family names and the associative feelings of humiliation linked to men. The subtle nuances of women and their reactions to oppression give a strong emotive content to the work.
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Some Effects of X-Irradiaion on the Adrenal Response to Hypothalamic Stimulation in Rats

Some Effects of X-Irradiaion on the Adrenal Response to Hypothalamic Stimulation in Rats

Date: January 1967
Creator: Agnew, Robert Laing
Description: Exactly where in the hypothalamus is the adrenal-pituitary response to X-irradiation "triggered" or initiated? Moreover, does ionizing radiation act directly on specific centers in the brain or does it act indirectly via the production of some humoral agents? Finally, what role does the hypothalamus play in the radiation-syndrome? The purpose of the present study was to attempt to answer these questions by determining the effects of two stressor agents, X-irradiation and electrical stimulation applied either singly or together, on the activity of the adrenal-pituitary axis. The parameters measured were changes in plasma corticosterone, in circulating eosinopihils, and in adrenal gland weight.
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Present tense marking as a synopsis of Southern American English: Plural verbal -s and zero 3rd singular.

Present tense marking as a synopsis of Southern American English: Plural verbal -s and zero 3rd singular.

Date: May 2005
Creator: Aguilar, Amanda G.
Description: This thesis explores the evolution plural verbal -s ("People thinks he is guilty") and zero 3rd singular ("He think he is guilty") in data from two sources on Southern English: The Linguistic Atlas of the Gulf States (LAGS) and The Linguistic Atlas of the Middle and South Atlantic States (LAMSAS). The research questions that underlie this study consider (1) the demographic association of plural verbal -s and zero 3rd singular, (2) the maintenance of each form, (3) the constraints on their use, and (4) the origins of -s variability. The atlas data suggest the following for plural verbal -s: (1) it has a British source, (2) it was present in both African American Vernacular English (AAVE) and early Southern White English (SWE), and (3) there were different grammatical constraints on its use in AAVE and SWE. Data for zero 3rd singular -s suggest this form (1) did not have a British source and (2) that it has historically been an AAVE feature.
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The effect of individual versus collective creative problem solving experiences on fourth- and fifth-grade students' compositional products.

The effect of individual versus collective creative problem solving experiences on fourth- and fifth-grade students' compositional products.

Date: December 2004
Creator: Aguilar, Beatriz E.
Description: The purpose of the study was to explore the effects that individual vs. collective structured creative musical problem solving tasks had on students' compositional products. Subjects in a convenience sample of 32 fourth-graders and 32 fifth-graders were randomly assigned to either the individual or collective condition. The 3 treatment sessions were characterized by an open-ended creative problem solving task, which included questions intended to guide subjects through 3 stages of the creative problem solving process: Understanding the Problem, Generating Ideas, and Planning for Action. Subjects participated in the pre- and posttest individually. Three experienced music educators assessed the compositional products in terms of pattern use, cohesiveness, and creativity. The originally intended MANCOVAs could not be carried out because the data did not meet the necessary assumptions. Pretest and posttest scores were explored with individual ANOVAs. The Bonferroni technique was used to adjust the alpha level. The statistical analyses showed that subjects exposed to the individual condition obtained higher scores than subjects exposed to the collective condition on six of the eight explored subtests, but these differences were not significant. The level of interjudge reliability decreased at each of the three measurements of the study: pilot test, pretest, and posttest. The ...
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Interpersonal Factors Related to the Pursuit of a Higher Education Among First Generation Undergraduate Students

Interpersonal Factors Related to the Pursuit of a Higher Education Among First Generation Undergraduate Students

Date: May 2012
Creator: Aguirre, Jacqueline S.
Description: The typical educational stressors experienced by college students, in conjunction with developmental stressors such as separation from parents, individuation, and perceived social support, can interact to impact adaptation significantly. First generation college students (students who are the first in their family to attend college) can experience stressors beyond the typical educational stressors experienced by later generation college students, including lack of support from family and peers as well as financial difficulties that can interact to impact the pursuit of an education beyond the undergraduate level. The present study examined factors that may be especially influential in the pursuit of a higher education for first generation college students. Results indicated that aspects of family enmeshment were related to academic motivation for first generation students, but not for later generation students. Exploratory analysis showed that family and finances were mentioned more often among first generation students when compared to later generation students as stressors that strongly influence the desire to continue beyond the undergraduate level.
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