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 30 for “"ATR-FTIR spectroscopy"”.
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ATR-FTIR spectroscopy and Raman microscopy studies of organosilane diffusion and hydrolysis in PVC films.
… total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and Raman confocal microscopy have been used to study the diffusion, hydrolysis and condensation of three organosilanes in silicon / PVC / silane laminates. These processes are thought to contribute to the formation of the …
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Application of attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy to measure sub-lethal effects of potential mutagens
Techniques employed in vibrational spectroscopy monitor the vibrational modes of functional groups within biomolecules and enable a correlation between chemical information and histological structures. Interrogation of biological samples using infrared (IR) techniques generates spectrum with …
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Analysis of Blue Fountain Pen Ink by UV-Vis Spectroscopy, ATR-FTIR Spectroscopy, and Thin Layer Chromatography Enhanced with RGB Spot Evaluation to Construct a Database for Comparison and Identification.
… (TLC) enhanced with RGB spot evaluation, UV-Vis spectroscopy, and ATR-FTIR spectroscopy. All three methods were used to analyze 89 fountain pen ink samples. All three methods were able to discriminate between the majority of the ink samples. However, some samples were still similar and difficult …
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Investigating the effects of organic pollutants on amphibian populations in the UK
… and low-cost manner. The application of biospectroscopy in environmental monitoring represents such a scenario. Biospectroscopy is based on the vibrations of functional groups within biological samples and may be used to signature effects induced by chemicals in cells and tissues. Here, …
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Synthesis of a renewable sourced thermotropic polyester with 2,5-furandicarboxylic acid
… out to produce a random mesogenic polyester. ATR-FTIR spectroscopy was used to analyze the backbone structure of the polymer. Thermal analysis performed on a DSC demonstrated a glass transition temperature and overlapping nematic and isotropic melt phases, suggesting that the polyester is …
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Synthesis, properties and applications of single-component anion-exchange materials
… total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy. Different crystallographic, electrochemical and spectroscopic parameters were analyzed to study properties like cation size and its effect in selectivity, morphology of thin films made from these salts, both in the surface …
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Biospectroscopy investigations Into cervical cytology
… total reflectance, Fourier-transform infra-red (ATR-FTIR) spectroscopy detected that treatment for CIN significantly alters the biochemical fingerprint in the cervix, compared with women who have not had treatment; this is due to the excision of cervical tissue rather than a disease controlling …
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Formulation of novel buccal mucosal drug delivery systems for nicotine replacement therapy (NRT)
… total reflectance – Fourier transform infrared (ATR-FTIR) spectroscopy (physical interactions), thermo gravimetric analysis (TGA), differential scanning calorimetry (DSC), (thermal profiles) and high-performance liquid chromatography (HPLC) (drug loading efficiency and release). NIC stabilisation …
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A Systems Approach to the Modeling and Control of Molecular, Microparticle, and Biological Distributions
… system for molecular distributions. In situ ATR-FTIR spectroscopy was used to determine monomer concentration; off-line gel permeation chromatography was used to determine the molecular weight distribution. Kinetic parameters are determined using maximum likelihood estimation. For the first …
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EVALUATION OF PHARMACEUTICAL AND COSMETIC USE OF EXCIPIENTS OBTAINED FROM CITRUS PROCESSING WASTE PRODUCTS
… with Mass Selection Detector (GC/MS) and ATR-FTIR spectroscopy. The raw extract was predominantly composed of long and medium-chain fatty acids with 70 % saturated and 30 % unsaturated acids. ATR-FTIR spectroscopy suggested that the extract appeared to be primarily composed of waxes and, …
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Nanophase separation in monodisperse rodcoil diblock polymers
… based on electron diffraction results. Polarized ATR-FTIR spectroscopy further suggests that rod segments are preferentially oriented in the plane of the film."
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Synthesis of self-assembled polystyrene nanospheres/cadmium metal nanoparticles (PSNs/CdMNPs) composite thin film for its application as adsorbent and catalyst
… (FESEM) and an energy dispersive X–ray (EDX) spectroscopy, respectively. Physical and chemical physical stability of the secondary pores were tested toward continuous laser irradiation of 633 nm wavelength and oxygen/argon reactive ion etching (O2/Ar RIE), respectively. Thermal catalytic …
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Hydrogen terminated silicon surfaces: Development of sensors to detect metallic contaminants and stability studies under different environments
… of Ni2+using attenuated total reflection (ATR) technique. The nickel infrared sensor was prepared on a silicon ATR crystal uniformly coated by a 1.5 micron Nafion film embedded with dimethylglyoxime (DMG) probe molecules. The detection of Ni2+ was based on the appearance of a unique …
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Graphite Doped PAN Nanofiber Mats Infused Polymer Composite Pipeliners: Experimental Diffusion Characterization
… PAN Nanofiber mats in Bisphenol A epoxy polymer matrix. The volume fractions of PAN NPCL (P0.1% and P0.5%) and Graphite doped PAN NPCL (G0.05%P0.1% and G0.2%P0.5%) were selected to test the absorption characteristics. For the absorption analysis test, three different mediums (Water at 23 °C, Water …
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Optical diagnostics of lithium-sulfur and lithium-ion battery electrolytes using attenuated total reflection infrared spectroscopy
… and physical processes governing performance. FTIR spectroscopy is a powerful technique for real time species identification and quantification. ATR FTIR allows investigations of battery electrolytes in realistic geometries and at high C-rates. A novel operando spectro-electrochemical cell has …
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Characterization and agronomic evaluation of biochar amendments in a midwestern loam soil: effects on soybean yield, soil nutrient retention, and leachate quality
… gasification. Proximate and elemental analyses, ATR-FTIR spectroscopy, surface area estimation, and molar ratio assessments were used to evaluate carbon stability, aromaticity, surface functionality, and nutrient content. The WSB biochar exhibited higher ash content, greater nutrient …
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Spectrokinetic studies of the photostability and the photodegradation of Diethylstilbestrol
… including spectrophotometry, fluorescence spectroscopy, ATR-FTIR spectroscopy and SEM. The initial investigations confirmed that DES is photoactive and that the reaction is solely photochemical. It was determined that no thermal activity was involved in the reactions taking place. Other …
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FORENSIC PHARMACEUTICAL ANALYSIS OF COUNTERFEIT MEDICINES
… Total Reflection-Fourier Transform Infrared (ATR-FTIR) spectroscopy, Raman spectroscopy and two probe Mass Spectrometry (MS) methods were assessed for the rapid screening of tablet dosage forms. These systems were chosen because NO solvent extraction of the sample was required. Comparison with …
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Electrochemical Pretreatment for Microfiltration of Surface Water: Mechanisms of Fouling and Its Control
… total reflectance – Fourier-transform infrared (ATR-FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), electron microscopy, light scattering, and colorimetry. Fouling of a commercial polymeric MF membrane following electrocoagulation was found to (1) be lower at …
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Biospectroscopy towards screening and diagnosis of cancer
… committing initiating events. Vibrational spectroscopy has the potential to play an integral role within systems biology research approaches, as it is able to identify chemical bond alterations within molecules independent of where these molecules reside. Its integration with current …
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