2006 MU theses - Access restricted to MU
Permanent URI for this collection
The items in this collection are theses that are available only to members of the University of Missouri-Columbia campus. Click on one of the browse buttons above for a complete listing of the works.
Browse
Recent Submissions
Item Consumer and descriptive analysis of flavored omeprazole oral suspensions(University of Missouri--Columbia, 2006) Moragudivenkata, Madana M.; Grün, Ingolf, 1962-[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Gastroesophageal reflux disease or GERD, a common and widely prevalent gastro intestinal disease in US population. Lack of suitable liquid dosage forms, palatability and compliance issues are severe limitations for the effective use of omeprazole, an immediately release proton pump inhibitor (PPI) in pediatric patients, children and critically ill patients wit h GERD. This study was aimed to evaluate and compare four newly developed flavored omeprazole oral suspensions with two other commercially available formulations for their palatability and to understand the product characteristics of new formulations using sensory consumer and descriptive methods. A total of 54 supertasters who are genetically sensitive to bitterness, evaluated all the six flavored omeprazole oral suspensions for their acceptance and preference. The analysis of variance (ANOVA) of acceptance data revealed significant differences among the six flavored suspensions. Consumer preference data ana lysis reveals no significant differences between Strawberry cream without omeprazole, Zegerid [trademark symbol TM] and Tutifruti products. Descriptive data analyses by multivariate statistical tools showed that "sweetness" and "aftertaste sweetness" have strong influence in the overall liking of the products and were strongly correlated with Strawberry cream without omeprazole and Tutifruti products.Item Effect of gate length in enhancing current in a silicon nanowire wrap around gate MOSFET(University of Missouri--Columbia, 2006) Waseem, Akbar; Islam, Naz E.[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] A 3-D silicon nanowire wrap around gate (WAG) MOSFET was designed and it was shown that the properties of the cylindrical channel silicon nanowire device were inline with those of a conventional MOSFET. The concept of interferometric lithography was introduced for the fabrication of nanowire. The current conduction process through the nanowire device has been investigated. A number of parameters such as carrier confinement, effects of parallel and transverse field-dependent mobilities, and carrier scattering due to Coulomb effects, acoustic phonons, impurity doping profile and surface roughness influences the transport process in the channel regions. The subthreshold slope characteristics were calculated for the nanowire device. Improvements in the nanowire WAG MOSFET has been investigated by changing nanowire device dimensions. The positive impact of reducing gate length on current along the channel of a silicon nanowire wrap-around-gate MOSFET has also been demonstrated. It has been shown analytically that in a WAG MOSFET with shorter gate length, transverse electric field in the channel is suppressed considerably which result in improved carrier mobility and drift velocity along the channel as compared to a WAG MOSFET with a longer gate length. Simulated I-V characteristics of short and long gate nanowire WAG MOSFETs have been presented and it has been found that for 50 nm channel diameter, the current in a short gate device is almost four times higher than that in a long gate device.Item College students' reasons for abstaining or limiting drinking: factor structure, predictors, and relations to abstention and alcohol-related outcomes(University of Missouri--Columbia, 2006) Epler, Amee J., 1976-; Sher, Kenneth J.[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] All addictive behavior can be conceptualized as a balance between impelling and inhibiting forces. Increasing knowledge of how motives (both approach and avoidance) influence drinking would result in a more comprehensive understanding of the etiology, maintenance, and resolution of problematic drinking. A 24-item measure of reasons for abstaining or limiting drinking (RALD) was administered annually in a large prospective study of college students' drinking behaviors. A series of factor analyses on RALD items resulted in a 3-factor solution: Upbringing, Negative Consequences, and Anticipated Costs. Correlational analyses suggest that RALD are associated with demographic variables, personality traits, and several measures of alcohol involvement. Prospective analyses suggest that RALD is a complex construct with important differences in RALD factors' influences on drinking behaviors. The current study significantly extends previous research by characterizing the construct of RALD in greater detail and describing how these factors relate to specific alcohol-related outcomes.Item Hydrology, vegetation and waterbird response to land management strategies in the San Luis Valley(University of Missouri--Columbia, 2006) D'Errico, Michael A.; Fredrickson, Leigh H.[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The distribution of wetlands in the San Luis Valley has been altered by human modifications that influence the timing, distribution and characteristics of wetland environments available to wetland dependent species. I examined the hydrologic regime, vegetation community composition and structure and waterbird use of seasonal wet meadow and temporary playa wetlands located on public and private land subject to idle, grazing and haying land management practices. Results indicated that wetlands located on public land contained water earlier and for longer durations than private land. Although vegetation community composition was similar across analogous habitat types, seasonal wet meadow public-idle sites maintained greater vegetation cover and vertical density than private sites, while temporary playa sites showed similar vegetation characteristics across land management practices. Overall, most waterbirds were observed during May. Waterbird use of study sites was highly variable across time, wetland type and land management practice with dabbling ducks more frequently observed on seasonal wet meadow public-idle sites and shorebirds on temporary playa private-grazed sites. Recognizing how different ownership and land management practices influence wetland distribution and quality is critical in establishing the appropriate habitat based goals and objectives to meet conservation needs.Item Use of fluorescence excitation emission matrix spectroscopy for water and wastewater characterization(University of Missouri--Columbia, 2006) Koirala, Amod K., 1974-; Deng, Baolin[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The Excitation Emission Matrix Spectroscopy (EEMS) has the potential to be used for the real time monitoring of environmental effects on water and aquatic systems.Chemical compound samples prepared in the laboratory whereas water and wastewater samples were collected form around the state of Missouri and Kansas. Samples were filtered and properly diluted before they were scanned for EEMS. 3-D signatures of water and wastewater samples from known source were obtained from f-4500 fluorescence spectrophotometer to characterize the fluorescence pattern, center position and peak intensities. It was found that the DI water samples showed scattered but weak fluorescence whereas the tap water samples showed a fluorescence center clustered at excitation 220nm and emission 350nm. The sample has very low fluorescence peak intensity. Spectra from all sources i.e. chemical compound sample, river water, lake water, landfill leachate, wastewater influent and effluents showed distinct pattern and peak centers on them. However, signature on landfill leachate and wastewater influents did show higher peak intensities. The dilution factor did not change the pattern of signature and the location of fluorescence instead changed the peak intensity. Dilution was must to landfill leachate samples and wastewater samples to get clear and actual signature. Higher and intense peaks were found with the increasing concentration of sample.