Search for dissertations about: "liquid helium"
Showing result 21 - 25 of 27 swedish dissertations containing the words liquid helium.
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21. Quantum memory development and new slow light applications in rare-earth-ion-doped crystals
Abstract : When doped into solid state transparent crystals, rare-earth ions can have optically excited states with milliseconds coherence time and up to six hours coherence time for hyperfine levels after being cooled down to liquid helium temperature. This long coherence property makes them unique as solid state material and attractive for quantum information applications. READ MORE
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22. Automation, hyphenation and multidimensional chromatography for PAH analysis : Analytical techniques to simplify sample complexity
Abstract : One group of organic environmental pollutants which are potentially hazardous to human health is polycyclic aromatic hydrocarbons (PAHs). These compounds consist of two or more benzene rings in their structure among which benzo[a]pyrene (B[a]P) is classified as a human carcinogen. READ MORE
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23. Characterisation of aerosol delivery devices and their influence on deposition in humans and animals
Abstract : One way of administrating pharmaceutical drugs in the development phase and in the clinical situation is by inhalation. It is essential to ensure an accurate delivered dose, as the prediction of the effect and side effects of the drug action is dependent on a precise estimation of the given dose. READ MORE
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24. Functional Metallic Glasses
Abstract : For decades, Metallic Glass, with its isotropic featureless structure while exhibiting outstanding mechanical properties was possible only at a high rate of quenching and with at least one dimension in the submicron regime. This limitation was overcome with the discovery of Bulk Metallic glasses, BMGs, containing three or more elements following the additional two empirical rules of optimum geometric size differences and negative energy of mixing among the constituent elements. READ MORE
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25. Zeolite Membrane Separation at Low Temperature
Abstract : The energy consumption of separation processes accounts for a large part of the total energy consumption in chemical industry. Membrane separation processes require much less energy than the currently used thermally driven separation processes and could therefore reduce energy consumption in industry considerably. READ MORE