There is an increasing interest in studying the concentration of the inhibitory neurotransmitter γ-Amino Butyric Acid (GABA), both in the healthy and diseased brain by using Magnetic Resonance Spectroscopy (MRS). Recent studies have shown correlations between an abnormal GABA concentration in certain regions of the brain and disorders as e.g. Parkinson’s disease and depressive disorders. There are presently many technical difficulties with the absolute quantification of GABA and the method MEGA-PRESS is currently the standard technique used in data acquisitions and processing of spectra. In this thesis, different techniques of GABA quantification have been evaluated and the most important aspect was to explore the precision of the method for further usage as a clinical tool. This project involved the exploration of data acquisitions by using a MEGA-PRESS sequence on a 3 T MR-system, processing of the resulting datasets using different methodologies, GABA quantification by using linear combination of model spectra (LCModel), and interpretation of the results by performing statistical analyses. The thesis resulted in a low resolution GABA-atlas of the brain which did not indicate any significant differences in the GABA concentration within the healthy subject group. However, a significant regional difference was observed in the brain. The main uncertainties arose mainly due to the relatively small subject groups and the large measurement error. Future measurements will require improvements both in the data acquisition and in analyzing these with an improved method of processing. The final conclusion was that the GABA quantification sequence MEGA-PRESS is useful both in diagnosis and as a research tool, although further improvements are required.

One of the most well-known trials in history is the one in Nürnberg, Germany, soon after the end of World War II. It is understandable that this caused a lot of discussions and that it was a world known trial which set the standards for a lot of similar occasions later on. The aim of this research is to focus on the opinions about this trial from a perspective of well-known Swedish newspapers. The method is to analyse three big papers with different political views and to see what separated them and what maybe united them. By studying the master-pages of the newspapers a picture is given of how the contemporary time had an understanding for the trial reports, which we in our time have established as facts. From the political views of the newspapers this research found out that the master-pages being analysed lived up to their ideal. One of the sources, “Göteborgs Handels- och sjöfartstidning”, was the most critical newspaper throughout the period of World War II and it was also obvious in this research that they had a very critical position. “Svenska Dagbladet” and “Dagens Nyheter” were more restrained and even in certain occasions defending.

Abstract The process of the Membrane Electrode Assembly in the Proton Exchange Membrane Fuel Cell and the controllable variables: the pressure, the temperature, and the time of the hot pressure in the producing period would be discussed here. The experimental result of the MEA revealed that for Nafion112 and Nafion117 membranes, the conditions under the hot pressure are the same in the temperature. However, the pressure used in Nafion112 should be lower than Nafion117. In this case, the better function of the MEA can be achieved. Because Nafion112 is thinner, its water in the process of the hot pressure would be lost with extreme ease. This has a very serious impact on the function of the MEA. Therefore, to improve the MEA¡¦s function, the MEA should be boiled by water after being fabricated. The outcome of the research showed that for the purpose of improving the function of the MEA, some humidifier structure adding to the design of STACK is necessary. In order to be familiar to the related practical skills of STACK, PEMFC is brought into use for an electric bicycle in this research. Because the maximum power of STACK is only 150W, which is almost equal to the one-third power of the electric bicycles available such as the 400W of GIANT-Lafree electric bicycle. Besides, the speed of the electric bicycle is too slow when it is operated by itself, but it will be run more smoothly by the means of the assistant power. If the PEMFC electric bicycle can make more useful STACK and be redesigned, not be composed as it used to be, the use of the PEMFC electric bicycle will be steadier, more efficient, and more beneficial to the environment.

Texte remanié de: Thèse de doctorat--Histoire--Strasbourg, 1980. / Bibliogr. p. 334-339.

Zugl.: Hagen, Fern-Univ., Diss., 2008. / Includes bibliographical references (p. [243]-244).

The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on December 28, 2009). Thesis advisor: Dr. Lee Wilkins. Includes bibliographical references.

Thesis (Ph. D.)--Open University. BLDSC no. DX89814.

Thesis (Ph. D.)--Columbia University, 1933. / Vita. Title in Chinese at head of t.p. Imprint covered by label: New York, Paragon Book Gallery. "Original edition ... Shanghai, Kelly & Walsh ... 1933." Bibliography: p. 133-143. "Index of periodicals": p. 145-148.

Thesis (Ph. D.)--University of Pennsylvania, 1930. / Published also without thesis note. Bibliography: p. 214-226.

First issued in 1936 as dissertation, Munich. / "Literatur-und Quellenverzeichnis": v. 2, p. 267-274.