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Analysis of Trace Amounts of Adulterants Found in Powders/Supplements Utilizing Direct Inject, Nanomanipulation, and Mass SpectrometryNnaji, Chinyere 08 1900 (has links)
The regulations of many food products in the United States have been made and followed very well but unfortunately some products are not put under such rigorous standards as others. This leads to products being sold, that are thought to be healthy, but in reality contain unknown ingredients that may be hazardous to the consumers. With the use of several instrumentations and techniques the detection, characterization and identification of these unknown contaminates can be determined. Both the AZ-100 and the TE2000 inverted microscope were used for visual characterizations, image collection and to help guide the extraction. Direct analyte-probed nanoextraction (DAPNe) technique and nanospray ionization mass spectrometry (NSI-MS) was the technique used for examination and identification of all adulterants. A Raman imaging technique was than introduced and has proven to be a rapid, non-destructive and distinctive way to localize a specific adulterant. By compiling these techniques then applying them to the FDA supplied test samples three major adulterants were detected and identified.
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Disease Tissue Imaging and Single Cell Analysis with Mass SpectrometryHamilton, Jason S. 05 1900 (has links)
Cells have been found to have an inherent heterogeneity that has led to an increase in the development of single-cell analysis methods to characterize the extent of heterogeneity that can be found in seemingly identical cells. With an understanding of normal cellular variability, the identification of disease induced cellular changes, known as biomarkers, may become more apparent and readily detectable. Biomarker discovery in single-cells is challenging and needs to focus on molecules that are abundant in cells. Lipids are widely abundant in cells and play active roles in cellular signaling, energy metabolism, and are the main component of cellular membranes. The regulation of lipid metabolism is often disrupted or lost during disease progression, especially in cancer, making them ideal candidates as biomarkers. Challenges exist in the analysis of lipids beyond those of single-cell analysis. Lipid extraction solvents must be compatible with the lipid or lipids of interest. Many lipids are isobaric making mass spectrometry analysis difficult without separations. Single-cell extractions using nanomanipulation coupled to mass spectrometry has shown to be an excellent method for lipid analysis of tissues and cell cultures. Extraction solvents are tunable for specific lipid classes, nanomanipulation prevents damage to neighboring cells, and lipid separations are possible through phase dispersion. The most important aspect of single-cell analysis is that it uncovers the extent of cellular heterogeneity that exists among cellular populations that remains undetected during averaged sampling.
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Multivariate Pattern Recognition of Petroleum-Based Accelerants and FuelsBodle, Eric S. 02 October 2007 (has links)
No description available.
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Multidimensional NMR studies of poly(ethylene-<i>co</i>-1-octene) copolymers and poly(ethylene-<i>co</i>-vinyl acetate-<i>co</i>-carbon monoxide) terpolymersNuamthanom, Anuttra 02 October 2007 (has links)
No description available.
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PROTEIN CROSSLINKING BY THE MAILLARD REACTION WITH ASCORBIC ACID AND GLUCOSEDAI, ZHENYU 13 July 2007 (has links)
No description available.
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Characterizatin of a Type II Metallothionein from <i>Helianthus annuus</i> Using Recombinant DNA TechniquesBhogavalli, Sridhar January 2007 (has links)
No description available.
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Analytical Preconcentration Systems Based on Nanostructured MaterialsKijak, Anna M. 09 April 2003 (has links)
No description available.
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ADAPTATION OF ATTENUATED TOTAL INTERNAL REFLECTANCE INFRARED MICROSPECTROSCOPY TO FLOW INJECTION AND SEPARATION TECHNIQUESPatterson, Brian Martin 20 April 2004 (has links)
No description available.
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INFRARED MICROSPECTROSCOPIC TECHNIQUES FOR THE QUALITATIVE ANALYSIS OF CROSS-SECTIONED RENAL CALCULI AND EMBEDDED MINERALIZED DEPOSITSAnderson, Jennifer C. 30 April 2004 (has links)
No description available.
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Techniques for the Detection and Development of: Part I Detection of Ozone for Water Treatment Part II. Utilizing Layer-By-Layer Thin Films with Long Period Grating FibersPuckett, Sean D. 28 April 2006 (has links)
No description available.
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