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Purification and Characterization of a Differentiation Factor From Rat Lung Conditioned Medium
A Differentiation Factor (DF) was purified from rat lung conditioned medium by a four-steps procedure. The DF has a molecular weight of 27000, and an isoelectric point of 4.70. Although DF is stable up to 60°C, it is sensitive to digestion by trypsin, chymotrypsin and subtilisin. DF forms granulocyte colonies in soft agar. Studies using anti-NRK CSF antibody demonstrated that DF is distinct from GM-CSF.
Date:
May 1988
Creator:
Ansari, Naser A. (Naser Awni)
System:
The UNT Digital Library
Aspects of Fathead Minnow Reproductive Behavior
Following a study of normal reproductive behavior of fathead minnows, Pimephales promelas, experiments were conducted to determine the stability/variability of behavior by sexually mature, territorial males under a variety of manipulated conditions. Collectively, these experiments indicate that although the individual behaviors of fathead minnows appear to be quite variable, the overall process, reproductive behavior, is stable.
Date:
May 1988
Creator:
Pyron, Mark
System:
The UNT Digital Library
Investigation Into the Causes for the Loss of Resolution in an Ion Chromatograpy Resin
Four mechanisms were considered as possible causes of the loss in resolution for a Dionex CG2 ion chromatography resin: 1) presence of inorganic ions strongly bound to the active sites; 2) adsorption of organic species; 3) physical alterations; and 4) chemical alterations. The instrumental analyses used to gather data were ICP, FT-IR, SEM, solid C-13 NMR and IC. Based on the results, no metal ions are bound to the resin, no organic species are held onto the resin, and no physical change was observable. The cause for the loss of resolution is a strong reduction in the number of active sites in the resin as confirmed by elemental analysis for the sulfur in the sulfonic acid present in the active sites.
Date:
May 1988
Creator:
Galindo, Irma C. (Irma Concepcion)
System:
The UNT Digital Library
Production, Location, and Binding of Violacein in Janthinobacterium
Violacein is a purple pigment typically produced by species of Chromobacterium and Janthinobacterium. A soil isolate, identified as Janthinobacterium, was studied. Maximal pigmentation occurred at 250C under aerobic conditions in the Keeble and Cross medium. Intracellular pigment was shown to be located in the cell membrane. Comparision of pigment production and growth curves indicated that violacein is synthesized in the cell and released into the environment possibly as a result of cell lysis. Extracellular pigment is water soluble, makes up 60% of the total pigment and shows a blue shift when compared to solvent extracted pigment. Results from purification indicated that the pigment is non-covalently bound to a small protein and aggregated into a larger molecule.
Date:
May 1988
Creator:
Lin, Ying-Chuan
System:
The UNT Digital Library
Niche Structure of an Anole Community in a Tropical Rain Forest within the Choco Region of Colombia
Ten species of anoles at Bajo Calima within the Choco of Western Colombia separate into two principal microhabitat groups: forest species, and those inhabiting openings and edges. The ten anoles further separate according to ground and vegetation dwellers. There is a relation at Bajo Calima between the number of anole species and vegetational structural diversity. Anole diversity within a given macrohabitat is by perch microsite/microclimate heterogeneity. These are the two major ecological dimensions along which similarity is limited or resources are partitioned.
Date:
May 1988
Creator:
Castro-Herrera, Fernando
System:
The UNT Digital Library
Effects of Lysolecithin on Macrophages
The effect of lysolecithin on the macrophage was studied using five macrophage function assays. The results of indicate that lyso lecithin is a macrophage activating agent which causes enhanced cell spreading, increased phagocytosis of sheep erythrocytes, heightened membrane activity in the presence of damaged autologous red blood cells, chemotaxis, and vigorous phagocytosis and intracellular killing of Staphylococcus albus.
Date:
May 1988
Creator:
Swee, Mei Hua
System:
The UNT Digital Library
Managerial Assessment Centers in the Hotel Industry: Concerns with Validity
A replication of an original study of managerial assessment centers performed by Sackett and Dreher (1982) is presented. Their major finding, indicating that assessment centers lack key tenets of internal construct validity, was corroborated in this study of a hotel managers' assessment center. This hotel managers' assessment center is also found to be externally valid using criterion-related validity. The argument is posed that assessment centers, as standardized tests of complex behavioral traits, appear to be operating outside the bounds of normal test construction principles. Five key explanations for this paradox are offered to guide much needed future research in this area. Additionally, a description of commonly utilized assessment center activities is offered the reader.
Date:
May 1988
Creator:
Baker, Thomas Grant
System:
The UNT Digital Library
The Grotesque Tradition in the Short Stories of Charles Bukowski
The style and themes central to Bukowski's prose have roots in the literary tradition of the grotesque. Bukowski uses grotesque imagery in his writings as a creative device, explaining the negative characteristics of modern life. His permanent mood of angry disgust at the world around him is similar to that of the eighteenth-century satirists, particularly Jonathan Swift. Bukowski confronts the reader with the uglier side of America--its grime, its corruption, the constricted lives of its lower class--all with a simplicity and directness of style impeccably and clearly distilled. Bukowski's style is ebullient, with grotesquely evocative descriptions, scatological detail, and dark humor.
Date:
May 1988
Creator:
Cooke, James M. (James Michael)
System:
The UNT Digital Library
The Angry Charmer
This screenplay, dealing with the theme of anger, is divided into three acts: setup, confrontation and resolution, respectively. Beginning in medias res, flashbacks are employed for expositions of the two main characters, Connor Tracy, alias the Angry Charmer, and Howard Goldberg. Act I opens with Connor at the wheel of a van, driving wildly, Howard accompanying. The setup is established. Act IlI returns to the careening van and then flashbacks to the college meeting of Connor and Howard. By the end of the act, the two, now unwilling relatives, go off on a European trip together. The confrontation has begun in earnest. Act III resolves the problem of Connor's anger through the purgative experi ences of the vacation, in particular the climactic ending.
Date:
May 1988
Creator:
Wall, Jeffrey R. (Jeffrey Robert)
System:
The UNT Digital Library
Relationship Between Ventilation and Oxygen Uptake at 40% And 85% of Peak Oxygen Uptake in 18-35-Year-Old Women Using the Arm Crank Ergometer
This study investigated whether or not a relationship exists between ventilation and oxygen uptake at 40% and 85% of V02 peak intensity in 30 upper body fit and 30 unfit 18- 35-year-old women. The correlations between ventilation and oxygen uptake at 40% of peak intensity for the fit group (r = -.51) and the unfit group (r = -.48) were modestly negative. At 85% intensity the relationship between ventilation and oxygen uptake in the two groups was -.44 and -.66, respectively. The lower correlations between ventilation and oxygen uptake observed at the 85% level of peak intensity among the unfit group could be due to a lower ventilatory threshold (66% = fit; 49% = unfit), lesser local muscle changes, along with reduced lactate and C02 management; all of which would be improved with training.
Date:
May 1988
Creator:
Zervopoulos, Peter C. (Peter Cosmas)
System:
The UNT Digital Library
Perspective Taking and Self Disclosure
The effects of taking a third person role on self disclosure, self sympatheticness and several nonverbal parameters of task involvement were examined in a psychotherapy analogue study. Subjects were classified as high or low in ego strength using previously established norms for college students. In the third person role subjects were instructed to describe themselves from the perspective of an "intimate and sympathetic best friend." An encouragement to talk format was used to facilitate self description from the first person. Support was not found for the hypotheses that altering the perspective used in self description would increase self disclosure and that high ego strength subjects would be better able to use a perspective taking intervention. Theoretical and methodological issues are discussed. Recommendations for future research are made.
Date:
May 1988
Creator:
Allen, Bruce W. (Bruce Wayne), 1958-
System:
The UNT Digital Library
Perceptions of Self-Disclosure in Interpersonal Compliance-Gaining
One hundred thirty-five undergraduate students were queried at North Texas State University. Perceptions of self-disclosure as a compliance-gaining tactic were surveyed. A fifteen item questionnaire was utilized. Fourteen questions were tested by an analysis of variance. One question was tested by chi-square. Data indicated that self-disclosure was viewed as an effective compliance-gaining tactic for both males and females; but females were perceived as more effective than males utilizing the tactic. Self-disclosure utilized as a compliance-gaining tactic was perceived as appropriate by both males and females. Results indicated females and males have similar perceptions regarding the appropriateness of utilizing the self-disclosure tactic. Male and female raters did not differ significantly from each other.
Date:
May 1988
Creator:
Vande Zande, Ann R. (Ann Rachel)
System:
The UNT Digital Library
Predictive Validity of the Retail Employment Inventory for the Selection of Over-the-Road Truck Drivers
An independent pilot study suggested that the Retail Employment Inventory (REI) might be predictive of subjectively and objectively measured Over the Road (OTR) truck driver performance. The present validation study consisted of three parts. First, an examination of the relationship between REI scores and 11 objective, performance criteria revealed weak and non-significant correlations. Second, a comparison of subjective ratings and REI scores failed to replicate the findings of the pilot study. And third, to confirm that the task components of the OTR job were correctly identified in the pilot study, a second job analysis was performed. Possible reasons for the failure of the REI to predict OTR performance and directions for future research are discussed.
Date:
May 1988
Creator:
Nygren, Richard Edwin, 1964-
System:
The UNT Digital Library
A Study of Political Leadership in Democratic Theory
This thesis offers an alternative of political leadership through a literature review of democratic theory as categorized into three models: classical, elitist, and egalitarian. The three models considered an ethical, an institutional, and an economic institutional postulate of political elites and their relationships. Still, the democratic elitist model emerging as the dominant model has been challenged by the egalitarian model enforcing economic institutional elites to be accountable to mass interest. As a competing idea, the egalitarian democratic model has been analyzed for its desirability over the democratic elitist model. This study is worthwhile in instigating an underscored concern surrounding economic institutional elites in the scope of accountable political elites, and in calling forth a further study on the preferred alternative, democratization of economic institutional elites.
Date:
May 1988
Creator:
Seong, Haeyoung
System:
The UNT Digital Library
Variables Affecting Grandchildren's Perceptions of Grandparents
While many studies have investigated grandparenthood from the point of view of the grandparent, few have considered this issue from the perspective of the grandchild. In this respect, a number of variables (i.e., grandchild age and gender, parents' marital status, and grandparents' age, gender, education, kinship position, residential proximity to and frequency of visiting with grandchildren, perceived influence on the grandchild, style of grandparenting, and relationship with the parents) were investigated as determinants of the quality of the grandparent-grandchild relationship in a sample of 171 adolescents and young adults. It was found that different sets of variables operated for different grandparents to predict the quality of their relationships with grandchildren.
Date:
May 1988
Creator:
Shore, R. Jerald (Robert Jerald)
System:
The UNT Digital Library
Orality, Literacy, and Character in Bleak House
This work argues that the dynamics of the oral and of the literate consciousness play a vital role in the characterization of Bleak House. Through an application of Walter Ong's synthesis of orality/literacy research, Krook's residual orality is seen to play a greater role in his characterization than his more frequently discussed spontaneous combustion. Also, the role orality and literacy plays in understanding Dickens's satire of "philanthropic shams" is analyzed. This study concludes that an awareness of orality and literacy gives the reader of Bleak House a consistent framework for evaluating the moral quality of its characters and for understanding the broader social message underlying Dickens's topical satire.
Date:
May 1988
Creator:
Nelms, Jeffrey Charles
System:
The UNT Digital Library
The Validity of the MMPI in the Selection of Police Officers
This study examined the validity of the Minnesota Multiphasic Personality Inventory (MMPI) as a predictor for police officer selection. The MMPI profiles of 212 police officer applicants selected to enter the training academy were compared to the standardized MMPI norms. Significant differences between the police officers and the normative population were found on all but two scales. When the average profile of officers still on the police force was compared with the average profile of terminated officers, two scales were significantly different. Significant correlations were obtained between four MMPI scales and the academy score criterion and two scales each for the commendation and supervisory rating criteria. A prediction equation was developed for academy score using multiple regression analysis.
Date:
May 1988
Creator:
West, Sandra Dean
System:
The UNT Digital Library
An Analysis of the Participant Selection Process Under the Comprehensive Employment and Training Act: Texas and Louisiana
Federal guidelines required prime sponsors under the Comprehensive Employment and Training Act, or CETA, to serve the "significant segments" of the eligible population. This study analyzes whether prime sponsors in Texas and Louisiana correctly identified and served those segments. This study finds that eligible ethnic groups were properly identified and were served equitably; age and gender distinctions, however, were inadequately observed in the providing of services.
Date:
May 1988
Creator:
Drake, William D. (William Daniel), 1950-
System:
The UNT Digital Library
Four Stories of Fantasy and Science Fiction
This thesis contains four stories of fantasy and science fiction. Four story lengths are represented: the short short ("Dragon Lovers"), the shorter short story ("Homecoming"), the longer short story ("Shadow Mistress"), and the novel ("Sword of Albruch," excerpted here).
Date:
May 1988
Creator:
Drolet, Cynthia L. (Cynthia Lea)
System:
The UNT Digital Library
The Development of a Definition and Applied Evaluation Criteria for Psycho-Narrative Video Art
This thesis is concerned with three problems. The first is that of distinguishing and defining one category of video art. The second is developing criteria for the evaluation of works in this category. The third problem is the application of these criteria to a new psycho-narrative video art piece created by the author as well as two pieces by other artists. This paper examines the use of film and video as an art form, focusing on specific influences affecting the evolution of psycho-narrative video art. Definitions for video art and psycho-narrative video art are developed. Descriptive criteria and three critiques are used to justify the conclusions. A concluding artist statement presents the personal view of the author.
Date:
May 1988
Creator:
Sadlowski, Gail
System:
The UNT Digital Library
Parental Expectations of Social-Emotional and Self-Help/Self-Direction Development in Abused Children
The present study examined the existence of unrealistic expectations in abusive parents. It was hypothesized that abusive parents would have higher expectations of their children's social-emotional and self-help skills than nonabusive parents. It was also hypothesized that abusive parents would have higher expectations of their children's social-emotional skills than nonabusive parents when both groups compared their children to average children. Abusive and nonabusive parents were administered the Social Competence Scales of the Child Behavior Checklist and the Daily Living Skills domain of the Vineland Adaptive Behavior Scales. The results contradict previous studies in this area and raise questions about present conceptualizations of expectations in abusive parents and the importance of this factor in child abuse.
Date:
May 1988
Creator:
Costas, Lisa Daniels
System:
The UNT Digital Library
A Habitat Evaluation and Management Plan for a Riparian Ecosystem
Ecological research involving habitat studies was conducted on the Elm Fork of the Trinity River in Denton County, Texas, from spring 1985 to spring 1986. Habitat Evaluation Procedures and Habitat Suitability Index Models developed by the United States Fish and Wildlife Service were applied to a 1419 hectares study area to determine the quality of habitat for four species: beaver, Castor canadensis, wood duck, Aix sponsa, pileated woodpecker, Dryocopus pileatus, and white crappie, Poxomis annularis. Population estimates were generated. A wildlife management plan was developed for the study area. Habitat Suitability Index Models were found to be overly conservative, underestimating the quality of habitat in areas of ecological transition.
Date:
May 1988
Creator:
Wilkinson, Robert N.
System:
The UNT Digital Library
Twenty-Six Two- and Three-Voiced Canons by Johann Walter Transcribed for French Horn
This thesis provides modern transcriptions for horn of twenty-six two- and three-voiced canons by Johann Walter, thereby adding to the literature available from the sixteenth century for that instrument. This project specifically attempts to introduce the high school and college student hornist to modal music in strict fugal form; the transcriptions appear as an appendix. The topics discussed in the body of this thesis include the canon, Johann Walter's life and significant contributions, sixteenth-century instrumental music, musicians' guilds, the zink, and the horn. This work is not intended to offer a comprehensive history of any of these areas, but to aid the teacher and student in the preparation and performance of these transcriptions.
Date:
May 1988
Creator:
Balthrop, Sharon
System:
The UNT Digital Library
Validating the Rorschach Defense Scale by Examining Defensive Functioning in College Students
This study attempted to provide validation for Lerner and Lerner's Rorschach Defense Scale by investigating the relationship between primitive defenses as measured by the Rorschach Defense Scale, level of object relations as measured by the Developmental Analysis of the Concept of the Object Scale, and characteristic defensive operations as assessed by the Minnesota Multiphasic Personality Inventory. One hundred and twenty undergraduates completed the Rorschach and MMPI, and the RDS and DACOS were applied to their Rorschach responses. The results show a significant positive correlation between use of primitive defenses and level of object relations development -and a significant negative correlation between the defense Projective Identification and MMPI scale 6 (Paranoia) elevation. Overall, these results did not support the validity of the RDS.
Date:
May 1988
Creator:
Esparza, Jana Scoville
System:
The UNT Digital Library