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 47 for “"Microspectroscopy"”.
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Planar Coils for NMR Microspectroscopy
… the feasibility of using planar coils in NMR microspectroscopy. The sensitivity of planar coils is modeled and measured, and optimum coil sizes are determined for specific applications. Also, susceptibility effects, which limit spectral resolution caused by the coil and the sample container, …
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Ultraviolet Microspectroscopy of Biological Materials
Made available in DSpace on 2015-05-12T17:08:47Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0004481.PDF: 2164678 bytes, checksum: ca769b07fe3346917f9053efb861ebb4 (MD5) Previous issue date: 1952
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High-Resolution Nuclear Magnetic Resonance Microspectroscopy
… both theoretical and experimental, to NMR microspectroscopy that expand considerably its practical application to studying mass-limited samples. Microcoils have been designed for higher magnetic fields (500 MHz) and also now incorporate a lock channel for longer two-dimensional (2D) …
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Synchrotron Based Infrared Microspectroscopy of Carbonaceous Chondrites.
Relationships between organic molecules and inorganic minerals are investigated in five carbonaceous chondrites, Northwest Africa 852 (CR2), Tagish Lake (C2-ungroupped), Orgueil (CI1), Sutter's Mill (CM), and Murchison (CM2), with micron spatial resolution using synchrotron-based imaging micro-FTIR …
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Integrated narrowband guided mode resonance photonic filters for advanced mid-infrared microspectroscopy
… mid-IR, and demonstrates GMR-filter-based DF-IR microspectroscopy for the first time. Last but not the least, this thesis introduces a new type of high-refractive-index photonic filter in the challenging but important molecular fingerprint mid-IR (6-10 µm or 1000-1600 cm-1) that shows behaviors …
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Single-cell analysis of hematopoietic cell fate on niche-mimetic platforms using Raman microspectroscopy
… herein describes the use of spontaneous Raman microspectroscopy and multivariate methods as a noninvasive technique for following hematopoietic stem cells and their progeny in vitro. Chapter 1 introduces the field of tissue engineering and the role of the stem cell microenvironment in guiding …
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Development of NIR Spectroscopy and Microspectroscopy Analysis of Soybean Seeds for Composition Improvements and Food Applications
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.
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Preparation and structure of Octenyl succinic anhydride modified waxy maize starch, microporous starch and maltodextrin
… at O-6 position when DS was 0.073. FT-IR microspectroscopy was used to detect the heterogeneity OS starch products. Native WM starch, OSA modified WM starches (DS=0.019 and 0.073) and a starch blend with native starch to OSA modified WM starch (DS=0.073) ratio of 7:3 were examined. More …
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Effects of Alpha-Tocopherol Antioxidant on the Bonding Properties of Resin Adhesive to Dentin Bleached with Sodium Perborate
… specimens were further evaluated with Raman microspectroscopy for depth of penetration and degree of conversion of adhesive resin. Mean bond strength values (MPa) for each group: unbleached control=26.2, bleached control=20.3, post-bleach treatment group=18.5. A 1-factor ANOVA and Tukey post …
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Retrograde melting in transition metal-silicon systems : thermodynamic modeling, experimental verification, and potential application
… droplets. Synchrotron-based Xray Absorption Microspectroscopy measurements provide experimental confirmation of such phase transitions and the underlying thermodynamics. Finally, the potential for using retrograde melting to improve the electronic minority carrier lifetime of low quality …
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Toward antiquity-inspired design in materials and construction: Insights into the production and durability of the ancient materials Egyptian blue and Roman concrete
… tomography, synchrotron x-ray diffraction, Raman microspectroscopy, scanning electron microscopy and thinsection petrography, map complex, heterogeneous dissolution processes throughout the cementing matrix of mortar samples. Samples from the Tomb of Caecilia Metella (First Century BCE) indicate …
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Raman spectroscopic characterisation of inorganic fibres and particles and their coverage by wetting agents.
… of fibres is then considerably reduced. Raman microspectroscopy has been shown to be a very powerful technique for the identification of micrometer-sized fibres and particles, with little or no sample preparation. Such spectra are sensitive to the composition of the material and can often be …
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Characterization of photocurable networks in real-time and post-exposure
… was ascertained via Fourier transform infrared microspectroscopy mapping experiments. The relationship between exposure intensity and time at a given conversion level revealed an increased occurrence of radical isolation at higher conversions. Furthermore, the exposure necessary to maintain a …
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Spectroscopic Study of Compressible Mobile Phase and Stationary Phase Behavior in Chromatography
… and SGC, in packed capillary columns using Raman microspectroscopy. On-column detection by laser-induced fluorescence is used to observe the effect of the mobile phase density gradient on separation speed and efficiency, and experimental efficiency is compared to a theoretical model. Additionally, …
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Methanogens from Siberian permafrost as models for life on Mars : response to simulated martian conditions and biosignature characterization
… at the single-cell level using confocal Raman microspectroscopy (CRM). The results showed survival and methane production in all methanogenic strains under simulated martian desiccation. After exposure to subfreezing temperatures, Siberian permafrost strains had a faster metabolic recovery, …
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Structure of cathode-electrolyte interfaces and correlation with ionic conductivity in Solid Oxide Fuel Cell devices
… Secondary Electrons Microscopy (SEM), X-ray microspectroscopy, X-ray Absorption Near Edge Structure (XANES) and electrochemical Impedance spectroscopy (EIS). XRD was used to evaluate the materials chemical reactivity through Rietveld analysis. SEM and X-ray microspectrscopy were used to study …
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Effect of Final Irrigation on Sealer-Dentin Interface for a Methacrylate-Based Resin Sealer
… specimens. Specimens were analyzed using Raman microspectroscopy, Goldner’s trichrome stain, and SEM. There was no difference in the quality of the intertubular sealer-dentin interface (as measured by hybrid layer production and sealer degree of conversion) or dentinal tubule sealer penetration …
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Optimising nutrient use efficiency in crop production
… approach for plant system investigations. Raman microspectroscopy as a tool for monitoring nutrient uptake at the leaf surface is also considered, alongside complementary ion probe and elemental analysis. Such a technique is useful in the agrochemical production of foliar fertilisers, where the …
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Effects Of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Resin Modified Glass Ionomer Adhesive
… first study to quantify DC of RMGI using Raman microspectroscopy, several challenges, including weak peak signal with and without fluorescence, were encountered and as a result, DC could not be determined. A significant difference (p<0.05) in ARI score was detected between the 0.5-min and …
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