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 35 for “"fourier transform- infrared (FT-IR)"”.
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Computation tools for the Fourier transform infrared (FT-IR) spectroscopic imaging
Over the pass 60 years, infrared (IR) spectral imaging has become an important tool with various applications such as identifying chemical distributions of biomedically relevant components in tissue, investigating biomedical and biological processes, and studying development of diseases …
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Structural and morphological characterization of hydrozincite and its interaction with organic molecules
… and mechanical properties, and have inspired ideas for the design and synthesis of biomimetic functional materials. The organic templates play an important role in directing assembly of the mineral/organic composites, and in controlling the nucleation and subsequent crystallization. …
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Thermomechanical sensitivity of microcantilever in the mid-infrared spectral region
… sensitivity of bimaterial cantilevers over a mid-infrared (IR) spectral range (5-10 µm) that is critical both for chemical analysis via vibrational spectroscopy and for direct thermal detection in the 300-700 K range. Mechanical bending sensitivity and noise were measured and modeled for six …
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Mid infrared spectroscopic imaging and tomography
Fourier Transform Infrared (FT-IR) Spectroscopic Imaging is an optical technique that simultaneously provides morphological (two dimensional) and mid-infrared spectral (one dimensional) information for a specimen under observation. In this dissertation, we develop a new instrument that extends the …
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Synthesis and characterization of metal complexes 2-Benzoylpyridene and di-2-pyridyl ketone schiff base ligands derived from s-methyldithiocarbazate fragment and its application to biological activity toward P.Falciparum
… (II), zinc (II), cadmium (II), nickel (II), iron (II) and cobalt (II). The ligands, HL1 and HL2 were synthesized by an acid catalyzed condensation reaction of s-methyldithiocarbazate with 2-benzoylpyradine and di-2-pyradylketone respectively. The reaction of metal salts with the resultant …
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Fast Identification of Components Commonly Used in Homemade Explosives by Spectroscopic and Chemometric Methods
… These capabilities would be invaluable to first responders, military, and security officials to establish an evidentiary link between a suspect and a reference in cases of HMEs, IEDs, arson and environmental contamination. </p> <p>Modern methods for quick identification of the fuels and …
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Study of controlled release of dapsone from modified montmorillonite and polymer matrices
… into sodium montmorillonite (MMT-Na+) and their combination with an anionic copolymer (Eudragit S100). The effects of the excipients on the API dissolution rate were studied from their release profile in simulated intestinal fluid (pH=7.4) at 37+/-0.5 C. In the first part of the research, …
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Use of fourier transform- infrared spectroscopic imaging as a tool for understanding early molecular events driving breast cancer progression
… important to study this characteristic cellular transformation in vitro. We report a direct comparison between α-SMA expression in primary normal human dermal fibroblasts and molecular spectra obtained through Fourier Transform infrared (FT-IR) spectroscopic imaging. Fibroblasts were stimulated …
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Infrared Spectra Analysis of Thermally Altered Iron Phyllosilicates and the Implications for Mars
<p>This study looks at two iron-rich phyllosilicates, which may be present on Mars. The minerals, greenalite and hisingerite, are rich in iron-II and iron-III, respectively. Small samples (~0.40 grams) of each mineral were crushed and heated in a Lindberg Tube Oven for approximately twenty-four …
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Computational methods for cancer diagnosis and prognosis from FT-IR spectroscopy data
… automated tools for cancer pathology using fourier transform infrared (FT-IR) spectroscopy imaging. We employ tissue microarrays (TMAs) to record IR imaging data and adopt elaborated computational and analytical algorithms and statistical methods to recognize patterns and to construct robust …
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Discrete frequency chemical imaging with stimulated Raman scattering microscopy
… vibrational spectroscopic techniques such as Fourier-transform infrared (FT-IR) absorption and spontaneous Raman scattering, CRS instruments are often operated in a single-frequency or limited bandwidth fashion and investigate only one small piece of the specimen’s vibrational spectrum at any …
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Advancing prostate cancer therapy: synthesis and characterization of docetaxel-loaded magnetic iron oxide nanoparticles for controlled drug release.
… Hence, there is a need for drug carriers such as Iron oxide nanoparticles, which are suitable for novel drug delivery systems due to low toxicity, biocompatibility, loading capacity, and controlled drug delivery to cancer cells. The purpose of the present study was to synthesize DXL-loaded …
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Integrated narrowband guided mode resonance photonic filters for advanced mid-infrared microspectroscopy
… vibrational absorption wavelengths in mid-infrared (mid-IR) have been discovered for various applications, and as a result, a faster summary of an MIR spectrum can be gained by probing a set of discrete spectral fingerprints only, enabling many applications including fast early cancer …
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Ft-Ir Study of the Dynamics of Entangled Polymer Melts
… polymer melts have been examined using polarized Fourier-Transform infrared (FT-IR) spectroscopy. Based on the reptation model, the motion of a chain in the presence of topological entanglements is that of a one dimensional random walk along the chain contour. This motion allows the end portions …
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Discrete-frequency infrared imaging with a quantum cascade laser and diffuse optical Raman tomography: methods toward improving clinically relevant label-free chemical contrast
… use of quantum cascade laser technology for mid-infrared spectral imaging and diffuse Raman tomography for three dimensional chemical analysis. In this thesis, we constructed and evaluated two analytical instruments which represent the first steps toward realizing these technologies. First, a …
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Characterization of graphite polyurethanes composite from renewable based oils
… composite from renewable based oils. Virgin cooking oil (VCO) as a renewable resource is the main substance in fabricating the renewable polyurethane (PU) and its graphite as called polyurethane graphite (PG). The fabricating sample have two methods that is open casting and heat press …
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Synthesis and characterisation of new multi-component compounds containing the non-steroidal anti-inflammatory drugs fenbufen and S(+)-ibuprofen
… aqueous solubility. In attempts to improve their solubility and bioavailability, crystal engineering techniques were employed to synthesise salts, co-crystals and cyclodextrin inclusion complexes containing these drugs. All newly discovered phases were characterised using single-crystal X-ray …
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A Physiological, Biochemical and Structural Analysis of Inositol Polyphosphate 5-Phosphatases from Arabidopsis thaliana and Humans
… The plant Arabidopsis thaliana contains fifteen predicted inositol polyphosphate 5- phosphatases (5PTases, E.C. 3.1.3.36) that have the potential to remove a 5-phosphate from various inositol second messenger substrates. To examine the substrate specificity of one of these Arabidopsis …
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Evaluation of the flocculation potential and characterisation of a bioflocculant produced by activated sludge bacteria from Vulindlela Wastewater Treatment Plant
… agents produced by microorganisms during their phase of growth as secondary metabolites. These bioflocculants play an important role in wastewater treatment and industrial applications. This study aimed to isolate, screen and identify bioflocculant producing-bacterium isolated from Vulindlela …
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Electronic structure and optical properties of sb-based self-assembled quantum dots for the mid-infrared range
… carriers in three dimensions comparable to their de Broglie wavelengths. Therefore, carriers exhibit δ-shaped energy levels and densities of states. Due to their band structure, QD systems show significant advantages as active regions in laser cavities, both in term of lower threshold current …
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