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 177 for “"FTIR spectroscopy"”.
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FTIR Spectroscopy of the photophobic sensory rhodopsin II/transducer complex from natronabacterium pharaonis
… <br>In der vorliegenden Arbeit wird die FTIR Spektroskopie als biophysikalische Methode zur Charakterisierung des Komplexes bestehend aus Sensory Rhodopsin II (SRII) aus Natronobacterium pharaonis und dem zugehörigen Transducer (HtrII) verwendet. Hierbei wurde eine neue Art der …
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Global Optimization in Least Squares Problems in FTIR Spectroscopy and X -Ray Crystallography
"Finally, the last part of the thesis considers the ""phase problem"" in X-ray crystallography. In particular, we address the problem of estimating the three-dimensional atomic positions of crystal structures from diffraction measurements alone. Starting from the ""minimal principle"" model, we …
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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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Use of Fourier transform infrared (FTIR) spectroscopy to determine the health-promoting index (HPI) of cow's milk
<p>Fourier transform infrared (FTIR) spectroscopy steadily has been gaining popularity for the analysis of milk components including total fat, protein, lactose, and ketones. To date, there have been few descriptions of the use of FTIR spectroscopy for the determination of milk fatty acid …
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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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Design, construction and commissioning of an apparatus to perform frequency response diffusivity measurements and high time-resolution ftir spectroscopy
… processes. Fourier transform infra-red (FTIR) spectroscopy can be used to monitor the uptake of sorbate molecules (and hence estimate their diffusivity) in zeolites. In addition, the behaviour of these molecules at the surface, and of the functional groups of the zeolite, can be observed. …
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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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Metallodendrimers as catalysts for C-C coupling reactions
… organic solvents. They were characterized by FTIR spectroscopy, 1H-NMR spectroscopy, 13C-NMR spectroscopy, micro-analysis and ESImass spectrometry.A reaction of the ligands with PdCl2(COD) or PdCl2(MeCN)2 gave palladium(II) complexes C1 – C4 in good yields of over 70%. The complexes were …
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Studies of physical properties of novel lithium polymer electrolytes.
… In this study the ionic conductivity, thermal, FTIR spectroscopy and morphology have been determined for both unplasticised and plasticised polymer electrolyte systems understudied. The following characterization results explain the effect of the polymer electrolyte films made by systematic …
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Nanoscale Hydrogel Films and Polymer Brushes Grafted Onto Nanocapillary Array Membranes for Externally Controllable Size -Selective Molecular Transport
… reflection mode Fourier-transformed infra-red (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), while SPR measurements were used to characterize both the synthesis of the hydrogel, as well as to characterize potential-induced volume changes on planar Au surfaces. Scanning electron …
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A Sensor for Metabolic Profiling of Traumatic Brain Injury
… of TBI patients. The techniques of Raman spectroscopy and Fourier Transform Infra-Red (FTIR) spectroscopy were investigated to determine whether they could selectively detect glucose, lactate and pyruvate in solution and whether they possessed the sensitivity required to detect those …
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Composite poly(dimethoxyaniline) electrochemical nanobiosensor for glufosinate and glyphosate herbicides
… molecule. Fourier transform infrared (FTIR) spectroscopy, UV-Vis Spectroscopy, Transmission electron microscopy (TEM) and Scanning electron microscopy (SEM) studies inferred successful doping of the nanostructured PDMA film by PSS and that the template PSS directed the synthesis of both …
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Poisoning and Sulfation on Vanadia SCR Catalyst
… with an incipient impregnation method. In situ FTIR spectroscopy indicate that K, Na, and Ca (among others materials) reduce, and sulfation and tungsten increase ammonia adsorption intensity on Brønsted acid sites. Activity measurements by MS showed K, Na, and Ca poison SCR catalysts, and …
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Integrated Experimental Characterization of the Lower Huron Shale in the Central Appalachian Basin
… Appalachian Basin, matrix permeability, Raman spectroscopy, Fourier Transform infrared spectroscopy (FTIR), and atomic force microscopy (AFM) were used in this study. According to the experimental results, matrix permeability is relatively high for a shale gas formation, suggesting great …
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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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Effect of Topological Morphology on Optical Filtering Properties of Porous Silicon
… pass filter in the infrared regime. FTIR spectroscopy was performed on each of these samples in order to obtain an optical cutoff wavenumber for each sample. Furthermore, SEM analysis was performed in order to determine the number of pores per unit area on the surface as well as the …
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Application of Functional Amyloids in Morphological Control and in Self-assembled Composites
… of its properties. Fourier transform infrared (FTIR) spectroscopy shows that at low concentration, fibrils require interdigitation of methyl groups on alanine (A), isoleucine (I), leucine (L), and valine (V). At higher concentration, globules do not have the same interdigitation of methyl groups …
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A study of the crystal chemistry, electron density distributions, and hydrogen incorporation in the Al₂SiO₅ polymorphs
… (high pressure X-ray diffraction and Polarized FTIR spectroscopy) and theoretical (VASP and Crystal 98) methods. An experimental high pressure X-ray diffraction study on andalusite and sillimanite has constrained their equation of state and the pressure derivatives of their bulk modulus with …
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Processing and characterization of graphene and graphene on silicon
… resulting specimens are characterized by Raman spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy to identify the composition of the resulting films. Current-Voltage (I-V) measurements are performed to determine the electrical properties of graphene on silicon. Conclusions are made …
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