Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 368 for “"chemical analysis"”.
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Photonic design for chemical analysis
… potential application of photonic design to chemical analysis, with a focus on spectrometry and chemical sensing. First, we demonstrate inverse design of single-layer metasurfaces with shape optimization. Each of the designed metasurfaces simultaneously focuses light and shapes the spectra of …
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A thermo-chemical analysis of some amphiboles
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology, 1951.
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Surface acoustic wave probes for chemical analysis
… Wave delay lines have been used as probes for chemical analysis. The interaction between matter adjacent to the SAW device surface and the propagating Raleigh wave caused measurable changes in the amplitude, phase and resonant frequency of the wave. The effectiveness of various electronic …
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A fiber optic polarimeter for use in chemical analysis
Polarimetry, as applied to chemical analysis, deals with the determination of the extent and direction that an optically active chemical species will rotate incident linearly polarized light. Although well developed for physical sensing, the technique of fiber optic polarimetry for chemical sensing …
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Chemical analysis of polymer blends via synchrotron X-ray tomography
… X-ray tomography has been used to obtain spatial chemical information about various polymer blends. The spatial images are acquired with synchrotron X-ray tomography because of its rapidity, good spatial resolution, large field-of-view, and elemental sensitivity. The spatial absorption data …
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Physico-chemical analysis of the shear strength of saturated clays
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1961.
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Machine Learning for Structure-Agnostic Chemical Analysis from Chromatographic Data
… property estimation, and quantitative analysis. This thesis investigates how machine learning (ML) can extract chemically meaningful information directly from chromatographic data to overcome these limitations. First, ML models are developed to establish a bidirectional relationship …
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A sedimentary and chemical analysis of the Niagara series in Michigan
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Geology, 1958
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Micrometer-scale chemical analysis using heated AFM cantilever and mass spectrometer
… presents the development of a micrometer-scale chemical analysis method using a heated atomic force microscope(AFM) cantilever and mass spectrometer. Simulations investigate the underlying transport mechanisms within the system and the impact of various design parameters. The way to optimize the …
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A Survey on the Microscopical and Chemical Analysis of Synthetic Wig Fibers
… analytical methods for microscopical and chemical examinations of wig fibers for the detection of the most variable features. Synthetic wig fibers are manufactured to take on the appearance of natural hair for either cosmetic or costume use. Subsequently, the characteristics of wig fibers, …
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Physical and chemical analysis of pig carcass decomposition in a fine sand
… This research was conducted to physically and chemically analyze pig carcass decomposition on a soil surface using conventional and newly developed methods for the potential use in estimating the PMI. Photographs of pig carcasses decomposing on forested and open land were scored using a …
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Chemical Analysis, Databasing, and Statistical Analysis of Smokeless Powders for Forensic Application
… to agglomerative hierarchical cluster (AHC) analysis, and six distinct classes were identified. Within each class, a single m/z ratio had the highest intensity for the majority of samples, though the m/z ratio was not always unique to the specific class. Based on these observations, a new …
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A textural and chemical analysis of the Hanson Lake ore deposit, Saskatchewan
The Hanson Lake ore body was a small (156,000 tons), massive lens with sharp ore-wall rock contacts and a homogeneous mineralogy. The major sulfide minerals were sphalerite and galena. Textures of the sulfide and gangue minerals indicate that the ore body had undergone deformation and …
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The chemical analysis of ceramic fabrics from medieval Dorset and its region.
… and the liquid samples were subjected to analysis by Atomic Absorption Spectrophotometry for a suite of ten elements. Statistical analyses confirmed that the two groups of kiln products could be separated using data from very few elements, and so a smaller suite of the four 'best …
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Scalable Electrochemical Surface Enhanced Raman Spectroscopy (EC-SERS) for bio-chemical analysis
… performance for electrical recording and electrochemical sensing in bio-electronics applications. However, vertical nanopillar-array electrodes made of inorganic conducting materials by conventional nanofabrication approach still faces challenges in high manufacturing costs, poor scalability, and …
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In situ chemical analysis of biological tissue--vibrational Raman spectroscopy of human atheroschlerosis
Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1992.
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