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Thermochemical Study of Crystalline Solutes Dissolved in Ternary Hydrogen-Bonding Solvent Mixtures (open access)

Thermochemical Study of Crystalline Solutes Dissolved in Ternary Hydrogen-Bonding Solvent Mixtures

The purpose of this dissertation is to investigate the thermochemical properties of nonelectrolyte solutes dissolved in ternary solvent mixtures, and to develop mathematical expressions for predicting and describing behavior in the solvent mixtures. Forty-five ternary solvent systems were studied containing an ether (Methyl tert-butyl ether, Dibutyl ether, or 1,4-Dioxane), an alcohol (1-Propanol, 2-Propanol, 1-Butanol, 2-Butanol, or 2-Methyl-1-propanol), and an alkane (Cyclohexane, Heptane, or 2,2,4-Trimethylpentane) cosolvents. The Combined NIBS (Nearly Ideal Binary Solvent)/Redlich-Kister equation was used to assess the experimental data. The average percent deviation between predicted and observed values was less than ± 2 per cent error, documenting that this model provides a fairly accurate description of the observed solubility behavior. In addition, Mobile Order theory, the Kretschmer-Wiebe model, and the Mecke-Kempter model were extended to ternary solvent mixtures containing an alcohol (or an alkoxyalcohol) and alkane cosolvents. Expressions derived from Mobile Order theory predicted the experimental mole fraction solubility of anthracene in ternary alcohol + alkane + alkane mixtures to within ± 5.8%, in ternary alcohol + alcohol + alkane mixtures to within ± 4.0%, and in ternary alcohol + alcohol + alcohol mixtures to within ± 3.6%. In comparison, expressions derived from the Kretschmer-Wiebe model and the Mecke-Kempter …
Date: May 2001
Creator: Pribyla, Karen J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

A Transcription of Op. 94 Morceau de Concert, by Camille Saint-Saëns For Solo Bass Trombone and Brass Ensemble

Access: Use of this item is restricted to the UNT Community
The transcription is an addition to the repertoire for brass ensemble and bass trombone. Consideration is given to the nineteenth-century orchestration treatises of Berlioz and Strauss as well as the twentieth-century texts of Erik Leidzén, Walter Piston, and Samuel Adler. The transcription process is shaped by the principles of these writers. The score is contained in the appendix.
Date: May 2001
Creator: Woods, Christopher P.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The uninvestigated factors: Dimensions of personality and psychopathology in sex offenders (open access)

The uninvestigated factors: Dimensions of personality and psychopathology in sex offenders

Understanding the relation between personality characteristics, psychopathology, and sexual offenses can contribute to developing more effective treatment interventions. Previous research with sex offenders has focused on general personality traits or inconsistently classified sex offenders based on psychopathology. It was hypothesized that combining personality and psychopathological traits can assist in understanding sex offenders. The current study evaluated 88 male sex offenders in a court-mandated outpatient treatment program utilizing the NEO-PI-R and the MMPI-2. Three clusters of child molesters were examined for differences in personality characteristics and number of offenses. A second-order principle axis factor (PAF) analysis of personality and psychopathology traits revealed three factors: Psychological Distress, Excitement-Seeking, and Social Desirability. The potential clinical utility of these dimensions in predicting treatment compliance is examined.
Date: May 2001
Creator: Briley, Josh
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Unique applications of cultured neuronal networks in pharmacology, toxicology, and basic neuroscience (open access)

Unique applications of cultured neuronal networks in pharmacology, toxicology, and basic neuroscience

This dissertation research explored the capabilities of neuronal networks grown on substrate integrated microelectrode arrays in vitro with emphasis on utilizing such preparations in three specific application domains: pharmacology and drug development, biosensors and neurotoxicology, and the study of burst and synaptic mechanisms. Chapter 1 details the testing of seven novel AChE inhibitors, demonstrating that neuronal networks rapidly detect small molecular differences in closely related compounds, and reveal information about their probable physiological effects that are not attainable through biochemical characterization alone. Chapter 2 shows how neuronal networks may be used to classify and characterize an unknown compound. The compound, trimethylol propane phosphate (TMPP) elicited changes in network activity that resembled those induced by bicuculline, a known epileptogenic. Further work determined that TMPP produces its effects on network activity through a competitive inhibition of the GABAA receptor. This demonstrates that neuronal networks can provide rapid, reliable warning of the presence of toxic substances, and from the manner in which the spontaneous activity changes provide information on the class of compound present and its potential physiological effects. Additional simple pharmacological tests can provide valuable information on primary mechanisms involved in the altered neuronal network responses. Chapter 3 explores the effects produced …
Date: May 2001
Creator: Keefer, Edward W.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
University Students and the Internet: Information Seeking Study (open access)

University Students and the Internet: Information Seeking Study

This study explored university students' information needs and seeking behaviors on the Internet. A Web-based survey was administrated one time. Two hundred responses were received from the target sample within the two weeks period of the study. Data were analyzed with descriptive statistics, factor analysis, and graphical representation. The study explored various issues related to the usability, preferences, and activities of the Internet, such as searching tools, e-mail, search engines, and preferred primary sources of everyday-life information needs. The study explored the perceptions of the students toward the Internet and the traditional library. Kuhlthau's model of the information-seeking process, which includes six stages and affective components, was utilized and modified in the construction of the Web survey. A study by Presno (1998), which includes the four types of Internet anxiety, was utilized in the construction of the Web survey. With regard to the six stages of Kuhlthau model, the majority of the respondents experienced stage 5, which was about information gathering; stage 3 had the next highest number of respondents. Very few respondents experienced stages 1 and 2. There was a systematic pattern in which, the earlier the stages the respondents were in, the more negative adjectives they selected, and …
Date: May 2001
Creator: Shamo, Esmaeel
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Virtual Teams and Technology: The Relationship between Training and Team Effectiveness (open access)

Virtual Teams and Technology: The Relationship between Training and Team Effectiveness

The impact of training on virtual team effectiveness was assessed in five areas: communication, planning tasks and setting goals, solving problems and making decisions, resolving conflict, and responding to customer requirements. A 12-page survey was developed exploring all aspects of virtual teams. 180 surveys were distributed, 52 were returned representing 43 companies. Training led to higher effectiveness in planning tasks and setting goals, solving problems and making decisions, and conflict resolution, but not in communication and responding to customer requirements. Training may not solve all the problems that virtual teams will encounter; however, training will make the challenges easier to handle.
Date: May 2001
Creator: Andrews, Angelique
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Virtual teams: The relationship between organizational support systems and effectiveness (open access)

Virtual teams: The relationship between organizational support systems and effectiveness

This study investigates the effects of eight organizational support systems on virtual team effectiveness in five areas: communication, planning tasks and setting goals, solving problems and making decisions, resolving conflict, and responding to customer requirements. One hundred and eighty surveys were sent to information technology managers and collaborative team members, representing 43 companies. The results indicated that developing new roles for IT professionals and senior managers significantly increased virtual team effectiveness in several areas. The findings support the theory that organizations that utilize virtual teams must create high-level structures, policies, and systems to support the teams and the information tools they use.
Date: May 2001
Creator: Townsley, Carole
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Penny Record (Bridge City, Tex.), Vol. 41, No. 42, Ed. 1 Wednesday, May 2, 2001 (open access)

The Penny Record (Bridge City, Tex.), Vol. 41, No. 42, Ed. 1 Wednesday, May 2, 2001

Weekly newspaper from Bridge City, Texas that includes local, state, and national news along with advertising.
Date: May 2, 2001
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 18, Ed. 1 Thursday, May 3, 2001 (open access)

Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 18, Ed. 1 Thursday, May 3, 2001

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date: May 3, 2001
Creator: Wisch, J. A. & Wisch, Rene
Object Type: Newspaper
System: The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 31, Ed. 1 Friday, May 4, 2001 (open access)

Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 31, Ed. 1 Friday, May 4, 2001

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date: May 4, 2001
Creator: Lynch, Mary Louise
Object Type: Newspaper
System: The Portal to Texas History
South Texas Catholic (Corpus Christi, Tex.), Vol. 36, No. 9, Ed. 1 Friday, May 4, 2001 (open access)

South Texas Catholic (Corpus Christi, Tex.), Vol. 36, No. 9, Ed. 1 Friday, May 4, 2001

Semi-monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date: May 4, 2001
Creator: Espitia, Paula
Object Type: Newspaper
System: The Portal to Texas History
The Penny Record (Bridge City, Tex.), Vol. 41, No. 43, Ed. 1 Wednesday, May 9, 2001 (open access)

The Penny Record (Bridge City, Tex.), Vol. 41, No. 43, Ed. 1 Wednesday, May 9, 2001

Weekly newspaper from Bridge City, Texas that includes local, state, and national news along with advertising.
Date: May 9, 2001
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 19, Ed. 1 Thursday, May 10, 2001 (open access)

Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 19, Ed. 1 Thursday, May 10, 2001

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date: May 10, 2001
Creator: Wisch, J. A. & Wisch, Rene
Object Type: Newspaper
System: The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 32, Ed. 1 Friday, May 11, 2001 (open access)

Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 32, Ed. 1 Friday, May 11, 2001

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date: May 11, 2001
Creator: Lynch, Mary Louise
Object Type: Newspaper
System: The Portal to Texas History
The Penny Record (Bridge City, Tex.), Vol. 41, No. 44, Ed. 1 Wednesday, May 16, 2001 (open access)

The Penny Record (Bridge City, Tex.), Vol. 41, No. 44, Ed. 1 Wednesday, May 16, 2001

Weekly newspaper from Bridge City, Texas that includes local, state, and national news along with advertising.
Date: May 16, 2001
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 20, Ed. 1 Thursday, May 17, 2001 (open access)

Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 20, Ed. 1 Thursday, May 17, 2001

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date: May 17, 2001
Creator: Wisch, J. A. & Wisch, Rene
Object Type: Newspaper
System: The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 33, Ed. 1 Friday, May 18, 2001 (open access)

Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 33, Ed. 1 Friday, May 18, 2001

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date: May 18, 2001
Creator: Lynch, Mary Louise
Object Type: Newspaper
System: The Portal to Texas History
South Texas Catholic (Corpus Christi, Tex.), Vol. 36, No. 10, Ed. 1 Friday, May 18, 2001 (open access)

South Texas Catholic (Corpus Christi, Tex.), Vol. 36, No. 10, Ed. 1 Friday, May 18, 2001

Semi-monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date: May 18, 2001
Creator: Espitia, Paula
Object Type: Newspaper
System: The Portal to Texas History
The Penny Record (Bridge City, Tex.), Vol. 41, No. 45, Ed. 1 Wednesday, May 23, 2001 (open access)

The Penny Record (Bridge City, Tex.), Vol. 41, No. 45, Ed. 1 Wednesday, May 23, 2001

Weekly newspaper from Bridge City, Texas that includes local, state, and national news along with advertising.
Date: May 23, 2001
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 21, Ed. 1 Thursday, May 24, 2001 (open access)

Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 21, Ed. 1 Thursday, May 24, 2001

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date: May 24, 2001
Creator: Wisch, J. A. & Wisch, Rene
Object Type: Newspaper
System: The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 34, Ed. 1 Friday, May 25, 2001 (open access)

Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 44, No. 34, Ed. 1 Friday, May 25, 2001

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date: May 25, 2001
Creator: Lynch, Mary Louise
Object Type: Newspaper
System: The Portal to Texas History
The Penny Record (Bridge City, Tex.), Vol. 41, No. 46, Ed. 1 Wednesday, May 30, 2001 (open access)

The Penny Record (Bridge City, Tex.), Vol. 41, No. 46, Ed. 1 Wednesday, May 30, 2001

Weekly newspaper from Bridge City, Texas that includes local, state, and national news along with advertising.
Date: May 30, 2001
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 22, Ed. 1 Thursday, May 31, 2001 (open access)

Texas Jewish Post (Fort Worth, Tex.), Vol. 55, No. 22, Ed. 1 Thursday, May 31, 2001

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date: May 31, 2001
Creator: Wisch, J. A. & Wisch, Rene
Object Type: Newspaper
System: The Portal to Texas History