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  Partner: UNT Libraries
 Language: English
 Collection: UNT Theses and Dissertations
Adaptive Advantages of Carotenoid Pigments in Alpine and Subalpine Copepod Responses to Polycyclic Aromatic Hydrocarbon Induced Phototoxicity

Adaptive Advantages of Carotenoid Pigments in Alpine and Subalpine Copepod Responses to Polycyclic Aromatic Hydrocarbon Induced Phototoxicity

Date: May 2010
Creator: Kovach, Matthew James
Description: Alpine zooplankton are exposed to a variety of stressors in their natural environment including ultraviolet radiation. Physiological coping mechanisms such as the accumulation of photoprotective compounds provide these zooplankton protection from many of these stressors. Elevated levels of carotenoid compounds such as astaxanthin have been shown to help zooplankton survive longer when exposed to ultraviolet radiation presumably due to the strong antioxidant properties of carotenoid compounds. This antioxidant capacity is important because it may ameliorate natural and anthropogenic stressor-induced oxidative stress. While previous researchers have shown carotenoid compounds impart increased resistance to ultraviolet radiation in populations of zooplankton, little work has focused on the toxicological implications of PAH induced phototoxicity on zooplankton containing high levels of carotenoid compounds. This thesis discusses research studying the role that carotenoid compounds play in reducing PAH induced phototoxicity. By sampling different lakes at elevations ranging from 9,500' to 12,700' in the front range of the Colorado Rocky Mountains, copepod populations containing different levels of carotenoid compounds were obtained. These populations were then challenged with fluoranthene and ultraviolet radiation. Results discussed include differences in survival and levels of lipid peroxidation among populations exhibiting different levels of carotenoid compounds, and the toxicological and ecological implications of ...
Contributing Partner: UNT Libraries
Adaptive planning and prediction in agent-supported distributed collaboration.

Adaptive planning and prediction in agent-supported distributed collaboration.

Date: December 2004
Creator: Hartness, Ken T. N.
Description: Agents that act as user assistants will become invaluable as the number of information sources continue to proliferate. Such agents can support the work of users by learning to automate time-consuming tasks and filter information to manageable levels. Although considerable advances have been made in this area, it remains a fertile area for further development. One application of agents under careful scrutiny is the automated negotiation of conflicts between different user's needs and desires. Many techniques require explicit user models in order to function. This dissertation explores a technique for dynamically constructing user models and the impact of using them to anticipate the need for negotiation. Negotiation is reduced by including an advising aspect to the agent that can use this anticipation of conflict to adjust user behavior.
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Addison's Literary Criticism as Found in The Spectator

Addison's Literary Criticism as Found in The Spectator

Date: 1950
Creator: Doughtie, Mary Eloise Wilson
Description: This thesis is a study of Joseph Addison's literary criticism as found in The Spectator.
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Addition Reactions of Some Aromatic Aldazines

Addition Reactions of Some Aromatic Aldazines

Date: August 1954
Creator: O'Dell, Stewart
Description: The paper explores the conclusion that the addition compound was bicyclic, and that the addition of each of the two moles of cyanic acid was dependent upon the other.
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Additive Functions

Additive Functions

Date: June 1963
Creator: McNeir, Ridge W.
Description: The purpose of this paper is the analysis of functions of real numbers which have a special additive property, namely, f(x+y) = f(x)+f(y).
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Adelardo Lopez De Ayala's Position in the Drama of the Nineteenth Century

Adelardo Lopez De Ayala's Position in the Drama of the Nineteenth Century

Date: 1950
Creator: Whaley, Joy
Description: This thesis discusses Adelardo Lopez De Ayala's position in the drama of the nineteenth century. Topics covered include: Literary movements in Spain in the nineteenth century, Lopez De Ayala's treatment of plot, the moral element in Lopez De Ayala's plays and character delineation in Lopez De Ayala's plays.
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The Adequacy of Financial Support Received by the Small High-School Bands in Texas

The Adequacy of Financial Support Received by the Small High-School Bands in Texas

Date: 1951
Creator: Settle, James Bristol
Description: The problem undertaken in this study is to attempt to determine the adequacy of financial support received by the small high school bands in Texas.
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The Adequacy of the Professional Preparation of the Catholic School Superintendent

The Adequacy of the Professional Preparation of the Catholic School Superintendent

Date: August 1964
Creator: Meyers, John F.
Description: The problem of this study was to determine the adequacy of the professional preparation of the Catholic school superintendent for his role as the educational leader in the diocesan school system. The study was divided into the following subdivisions: 1) establishing evaluative criteria to measure the adequacy of the professional preparation of the Catholic school superintendent; 2) evaluating the professional preparation of the superintendent in the light of the established criteria; 3) proposing a program which might close the gap between the existing practices and the established criteria.
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The Adequacy of the School Transportation Systems of Montague County, Texas

The Adequacy of the School Transportation Systems of Montague County, Texas

Date: 1950
Creator: Allen, Bill N.
Description: In this study an attempt is made to determine the adequacy of the school transportation systems of Montague County, Texas.
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ADHD Symptomology and Overweight among College Men

ADHD Symptomology and Overweight among College Men

Date: December 2011
Creator: Johnson, Leslee M.
Description: Attention deficit/hyperactivity disorder (ADHD) is a childhood disorder that often persists into adulthood. Among adults, ADHD is highly comorbid with addictive behaviors (e.g., substance abuse and dependence), and depressive disorders. Recently, an association between ADHD and obesity has been reported in the literature; emotional and binge eating may be “addictive behaviors” that contribute to weight gain in this population. The purpose of this study was to test competing models of the hypothesized link between ADHD symptomology and overweight. Specifically, in Model 1, symptoms of depression are expected to mediate the relationship between symptoms of impulsivity and inattention and emotional and binge eating which, in turn, leads to weight gain (i.e., increased BMI). In Model 2, however, the impulsive symptoms have direct relationships with emotional and binge eating in addition to being mediated by depressive symptoms. Structural equation modeling (SEM) was employed to test how the models fit the data of 790 college men. Both models fit the data well, with Model 2 being preferred because of its greater connection to theory. All paths were significant indicating that increased impulsive and inattentive symptoms predicted increased symptoms of depression that, in turn, predicted increased emotional/binge eating, which has a direct and positive ...
Contributing Partner: UNT Libraries