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 1051 for “"FTIR"”.
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FTIR Difference Spectroscopy Studies on Membrane Proteins
Fourier Transform Infrared Spectrsocopy (FTIR) is a powerful technique that is well suited to the investigation of protonation/deprotonation reactions of individual side chains within proteins, as well as any changes that might occur in the strength of H-bonds any change in the overall protein …
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FTIR studies of environmental effects on carbonmonoxymyoglobin
… thesis, Fourier Transform Infrared Spectroscopy (FTIR) was used to study the interaction between the protein myoglobin (Mb), and substrate carbon-monoxide (CO), as a model system of control in protein-ligand systems. IR spectra of the CO molecule bound to Mb have been obtained as a function of …
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FTIR studies of environmental effects on carbonmonoxymyoglobin
… thesis, Fourier Transform Infrared Spectroscopy (FTIR) was used to study the interaction between the protein myoglobin (Mb), and substrate carbon-monoxide (CO), as a model system of control in protein-ligand systems. IR spectra of the CO molecule bound to Mb have been obtained as a function of …
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Thermal Analysis of Milkweed Floss Using TG/FTIR
… thermal process. (pyrolysis-combustion) with TG-FTIR, it has been possible to identify the major organic volatile products during pyrolysis and to correlate gas evolution with the decomposition of the individual components (cellulose, hemicellulose and lignin) of the floss. During pyrolysis, …
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High-Magnification Digital Staining of FTIR Spectroscopic Images
… limitations in histopathologic examinations. FTIR spectroscopic imaging has seen groundbreaking success in the characterization of tissue, but has yet to provide practical pathological examination of biopsies. In an attempt to build a bridge between modern spectroscopic imaging techniques and …
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FTIR-Differenzspektroskopie zur Untersuchung von Konformationsänderungen in Proteinen
… auftreten können, lassen sich mit Hilfe der FTIR-Differenzspektroskopie beobachten. Sie verursachen Intensitäts- und Frequenzänderungen in den sogenannten Amidbereichen, die durch die Schwingungsmoden des Proteinrückgrats zustande kommen. Die Interpretation der spektralen Veränderungen bzw. …
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Application of FTIR microscopy to cultural heritage materials
… This thesis focuses on the application of FTIR microspectroscopic techniques for cultural heritage materials. The first section is aimed at introducing the use of FTIR microscopy in conservation science with a particular attention to the sampling criteria and sample preparation methods. The …
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FTIR Analysis of Bacteria Biomass-Mineral Interactions in Soils
… using Fourier-transform infrared spectroscopy (FTIR). Through FTIR analysis we were able to confidently identify areas of bacteria biomass-mineral interactions. The spectra revealed high bacterial activity within the range of 1400 – 1800 cm<sup>-1</sup>. The results suggested production of …
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FTIR study of carboxylic acids and tyrosines in bacteriorhodopsin
… in the thesis are the quality control in FTIR spectroscopy, prospective experiments, the present finding's implication to the mechanism of the color regulation and proton pumping of bR, and the general structure-function relationship of opsins.
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Optimization of capillary GC/FTIR for complex sample analysis
… chromatography-Fourier Transform Infrared (GC-FTIR) spectrometry has been accomplished by studying various columns, lightpipe designs, FTIR detectors and spectroscopic parameters. For adequate separation of complex samples the efficiency of WCOT (Wall Coated Open Tubular) fused silica capillary …
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FTIR and X-ray investigation of triphenylene based discotic liquid crystals.
… aligned discotic materials and vice-versa. FTIR allows conformational information about a molecule to be determined. The CH[2] wagging region was investigated to determine conformational information relating to the alkyl arms. Combination of FTIR and aligned samples allowed the alignment …
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Polarisationsabhängige FTIR-Spektroskopie : strukturelle Untersuchungen an den Proteinen Bakteriorhodopsin und Rhodopsin
Mit Hilfe der polarisationsabhängigen FTIR-Differenzspektroskopie werden molekulare Veränderungen während der lichtinduzierten Reaktion der Proteine Bakteriorhodopsin und Rhodopsin untersucht. Die Absorption von Licht durch das optisch aktive Zentrum initiiert in beiden Systemen molekulare …
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Application of Fourier-transform Infrared (FTIR) for Quality Control of Swiss Cheese
… Fourier-transform infrared spectroscopy (FTIR) was used in different parts of this study. FTIR collects the mid-infrared spectra (4000-700cm-1), and the resulting wave numbers formed, were used to monitor water extracts of Swiss-type cheese during manufacture, in defective cheeses and in …
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Echtzeitanalyse des photoinduzierten Wachstums von Siliziumoxid mittels spektroskopischer Ellipsometrie und FTIR-Spektroskopie
… zum Einsatz. Der Oxidationsprozess wurde mit FTIR-Spektroskopie und mit spektroskopischer Ellipsometrie in Echtzeit charakterisiert. Mittels FTIR-Spektroskopie konnte die Abnahme der H-Terminierung und das Wachstum der Oxidstruktur beobachtet werden. Für die Modellierung der ellipsometrischen …
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Kinetische Untersuchungen der Oxidation von luftgetragenen Rußpartikeln mittels ESR- und FTIR-Spektroskopie
Rußpartikel sind ein Produkt der unvollständigen Verbrennung von Kohlenwasserstoffen. Sie stellen einen wichtigen Bestandteil des atmosphärischen Aerosols dar. Die Oxidationskapazität der Troposphäre sowie die Stickoxid- und Ozonchemie der Stratosphäre werden durch Rußaerosole möglicherweise …
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Structure/reactivity Study of Methanol Fuel Cell Catalysts: NMR, FTIR, and Electrochemistry
Catalytic reactivity of Ru doped Pt nanoparticles for methanol electrooxidation reactions were also investigated, for both a commercially available Pt/Ru alloy and Pt nanoparticles doped with a spontaneously deposited sub-monolayer of Ru. An increase in catalytic activity was measured for samples …
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The use of ATR-FTIR to probe the release mechanism from hydrophilic matrices.
… studied using the complementary technique of ATR-FTIR by performing hydration experiments on the compacted tablets. Both standard data analysis approaches, such as peak area changes, and multivariate curve resolution (MCR) were applied to these datasets. The MCR studies showed some promise, but …
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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 Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface
In many experiments, surfactant adsorption and desorption at solid-liquid interfaces is found to be quite slow, considering that surfactants are small molecules. Attenuated total reflectance Fourier transform infrared spectroscopy was used to study the adsorption, desorption, and exchange of …
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