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An Investigation of Gas Chromatographic Separation of Tastes and Odors Produced by Actinomycetes

An Investigation of Gas Chromatographic Separation of Tastes and Odors Produced by Actinomycetes

Date: January 1965
Creator: Matlock, James K.
Description: It is the purpose of this thesis to evaluate a few selected gas chromatographic materials for the separation of odorants produced by an actinomycete culture under laboratory conditions. Also to compare the results obtained with concentrated solutions of a surface water containing similar odors under natural conditions.
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An Investigation of Graham High School Graduates to Determine Whether They are Meeting Stated Needs of Business as to Personality, Intelligence, and Character Traits

An Investigation of Graham High School Graduates to Determine Whether They are Meeting Stated Needs of Business as to Personality, Intelligence, and Character Traits

Date: 1949
Creator: Mayes, Billy Woods
Description: It was the purpose of this study to make an investigation of fifty-seven representative businesses that are located throughout the United States, in an attempt to find out just what the potential employers feel the school should give the potential employee in regard to personality and character training.
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Investigation of growth kinetics of self-assembling monolayers by means of contact angle, optical ellipsometry, angle-resolved XPS and IR spectroscopy.

Investigation of growth kinetics of self-assembling monolayers by means of contact angle, optical ellipsometry, angle-resolved XPS and IR spectroscopy.

Date: August 2004
Creator: Jakubowicz, Agnieszka
Description: Absorption of octadecanethiol and p-nitrobenzenethiol onto gold surfaces from ethanol solutions has been studied by means of contact angle, optical ellipsometry, angle-resolved XPS (ARXPS), and with grazing angle total reflection FTIR. Growth of the monolayers from dilute solutions has been monitored and Langmuir isotherm adsorption curves were fitted to experimental data. A saturated film is formed within approximately 5h after immersion in solutions of concentrations ranging from 0.0005mM to 0.01mM. We found, that the final density of monolayer depends on the concentration of the solution.
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An Investigation of I.Q. and Achievement Score Increase in Classes for the Emotionally Disturbed and Minimally Brain Injured as a Result of Operant Conditions Using Tangible Reinforcers

An Investigation of I.Q. and Achievement Score Increase in Classes for the Emotionally Disturbed and Minimally Brain Injured as a Result of Operant Conditions Using Tangible Reinforcers

Date: August 1973
Creator: Cooksey, James Roy
Description: This study was an objective investigation of an operant program in behavior modification using tangible reinforoers, which was conducted in two Special Education classes in the Denton Independent School District.
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Investigation of Lead Hydrolytic Polymerization and Interactions with Organic Ligands in the Soil/Sediment-Water Environment

Investigation of Lead Hydrolytic Polymerization and Interactions with Organic Ligands in the Soil/Sediment-Water Environment

Date: December 2002
Creator: Sanmanee, Natdhera
Description: The objective of this research was to investigate lead speciation in the soil/sediment-water environment and to better understand how the species affect lead mobility under different environmental conditions. The research involved both field soil and sediment samples as well as standard lead solutions. Field samples were fully characterized and extracted by aqueous and organic solvents. The results were compared and evaluated with the metal speciation model, MINTEQA2. Hydrolytic polymerization and organic complexation studies were conducted with standard lead solutions under controlled experimental conditions. Results of the field samples showed that pH, dissolved cations, ionic strength, dissolved organic matter, and nature of the soil/sediment matrix play major roles in the distribution and mobility of lead (Pb) from contaminated sites. In the aqueous equilibration experiment, the magnitude of Pb2+ solubilization was in the order of pH4>pH7>pH9. The results were in good agreement with MINTEQA2 predictions. An important finding of the research is the detection of Pb polymerization species under controlled experimental conditions. At pH 5.22, Pb polymeric species were formed at rate of 0.03 per day. The role of Pb complexation with organic matter was evaluated in both field and standard samples. Different methodologies showed three types of organically bound Pb. A ...
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An Investigation of Line and Plane Relationships in Two Concepts of Painting

An Investigation of Line and Plane Relationships in Two Concepts of Painting

Date: May 1971
Creator: Reed, Emil Patrick
Description: The problem of this investigation is the combining of the spatial concepts of Paul Cezanne and the Analytical Cubists in a single painting.
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An Investigation of Malingering and Defensiveness Using the Spanish Pai Among Spanish-speaking Hispanic American Outpatients

An Investigation of Malingering and Defensiveness Using the Spanish Pai Among Spanish-speaking Hispanic American Outpatients

Date: August 2013
Creator: Correa, Amor Alicia
Description: For response styles, malingering describes the deliberate production of feigned symptoms by persons seeking external gain such as financial compensation, exemption from duty, or leniency from the criminal justice system. In contradistinction, defensiveness occurs when patients attempt to downplay their symptoms of psychological impairment. Both of the aforementioned response styles can markedly affect the accuracy of diagnosis, especially on self-reports, such as multiscale inventories. As an important oversight, no studies have been conducted to examine the effect of culturally specific response styles on profile validity and the classification of malingering among Hispanic American clinical populations. The current study investigated whether the Spanish Personality Assessment Inventory (PAI) effectively distinguished between Spanish-speaking outpatient groups randomly assigned to honest, feigning, and defensive experimental conditions. In examining the results, PAI malingering indicators utilizing Rare Symptoms strategies (NIM and MAL) demonstrated moderate to large effect sizes. For defensiveness, Spanish PAI indicators also demonstrated moderate to very large effect sizes (M d = 1.27; range from 0.94 to 1.68). Regarding psychometric properties, Spanish PAI validity scales, provide adequate to good data on reliability and discriminant validity. Clinical utility of the Spanish PAI increases as different cut scores are employed.
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An Investigation of Methods for the Concentration of Chemical Compounds Produced by Actinomycetes and Their Relation to Tastes and Odors in Municipal Water Supplies

An Investigation of Methods for the Concentration of Chemical Compounds Produced by Actinomycetes and Their Relation to Tastes and Odors in Municipal Water Supplies

Date: 1957
Creator: Brown, Jerry H.
Description: It is the purpose of this investigation to improve upon techniques to enhance the taste of municipal water and attempt to devise one that could desorb the compounds from carbon in an unaltered state. It was decided that the odor character would be the criterion used to decide if the eluted compounds were the same as those in the raw water.
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An Investigation of Microbial Antagonism in Ten Denton County, Texas Soils

An Investigation of Microbial Antagonism in Ten Denton County, Texas Soils

Date: 1951
Creator: Dickey, Charles E.
Description: This thesis is concerned primarily with the growth and detection of soil microorganisms in ten Denton County, Texas, soils antagonistic to a specific gram-positive and a specific gram-negative bacterial organism.
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Investigation of Novel Electrochemical Synthesis of Bioapatites and Use in Elemental Bone Analysis

Investigation of Novel Electrochemical Synthesis of Bioapatites and Use in Elemental Bone Analysis

Access: Use of this item is restricted to the UNT Community.
Date: December 2012
Creator: DeLeon, Vallerie H.
Description: In this research, electrochemical methods are used to synthesize the inorganic fraction of bone, hydroxyapatite, for application in biological implants and as a calibration material for elemental analysis in human bone. Optimal conditions of electrochemically deposited uniform apatite coatings on stainless steel were investigated. Apatite is a ceramic with many different phases and compositions that have beneficial characteristics for biomedical applications. Of those phases hydroxyapatite (HA) is the most biocompatible and is the primary constituent of the inorganic material in bones. HA coatings on metals and metal alloys have the ability to bridge the growth between human tissues and implant interface, where the metal provides the strength and HA provides the needed bioactivity. The calcium apatites were electrochemically deposited using a modified simulated body fluid adjusted to pH 4-10, for 1-3 hours at varying temperature of 25-65°C while maintaining cathodic potentials of -1.0 to -1.5V. It was observed that the composition and morphology of HA coatings change during deposition by the concentration of counter ions in solution, pH, temperature, applied potential, and post-sintering. The coatings were characterized by powder x-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. The precipitated powders from the experiment were also characterized, with results ...
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