Browsing Institutt for kjemi by Document Types "Doctoral thesis"
Now showing items 1-20 of 138
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A study of carbonaceous aerosols in the Norwegian environment, focusing on the water-soluble organic carbon fraction
(Doctoral thesis, 2005)The aim of the present thesis was to study the carbonaceous fraction of ambient aerosols in the Norwegian environment, with a particular focus on the water-soluble carbonaceous fraction. Studies were based on bulk and ... -
A study of metal contamination in a natural ecosystem affected by smelter emissions
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:174, Doctoral thesis, 2008) -
Accelerating the understanding of chemistry: with path-sampling and human understandable machine learning algorithms
(Doctoral theses at NTNU;2022:289, Doctoral thesis, 2022)Understanding chemistry is essential for the optimization of reactions and the development of new reactions. Chemical reactions can be investigated by simulations without wasting any precious materials or be influenced by ... -
Aerogels; a new class of materials for catalytic purposes
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:212, Doctoral thesis, 2013)Silica aerogels containing copper(II) cations were prepared by adding the metal precursor during the sol-gel stage. The gel surfaces were made hydrophobic by applying the ambient-pressure-drying (APD) method, and various ... -
Analysis of Microarray Data Using Inductive Logic Programming and Ontological Background Information
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:46, Doctoral thesis, 2010)The use of formal logic in chemometric analysis has been sparse. However, there are some problems which are well suited for analysis with inductive logic programming (ILP), a class of machine learning methods based on ... -
Application of spectrometric and hyperspectral imaging techniques to the study of cultural heritage materials
(Doctoral thesis at NTNU;2016:241, Doctoral thesis, 2016)Works of art are often heterogeneous structures made up of different inorganic or organic materials, which may be of either natural or artificial origin. As a rule, they are not inert structures but frequently undergo ... -
Assessment of PEMFC Durability by Effluent Analysis
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:309, Doctoral thesis, 2011)A review of literature relevant for the understanding of chemical degradation in Polymer Electrolyte Membrane (PEM) systems was conducted. The proposed pathways to the formation of chemical species suspected of causing ... -
Asymmetric synthesis of substituted 2-aminotetralins
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:209, Doctoral thesis, 2010)Presented in this thesis are the results obtained from the project: Asymmetric synthesis of substituted 2-aminotetralins. The initial goal was to establish new or improved routes to enantiopure 2-aminotetralin (2-AT) ... -
Asynchronous and Infinite Replica Exchange Transition Interface Sampling
(Doctoral theses at NTNU;2024:215, Doctoral thesis, 2024)A possible alternative to running chemical experiments in the laboratory could be to conduct them digitally instead, by running computer simulations. One prominent simulation technique is Molecular Dynamics (MD), which ... -
Automatic monitoring systems for trace metals in natural and waste water: Nafion coated solid metal electrodes for sensitivity enhancement and stability improvement
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:162, Doctoral thesis, 2010)Voltammetry is one of a few analytical methods, suitable for on-line monitoring of trace metals and is sufficiently sensitive in the low μg/L range for this purpose. The advantages of in-situ use of voltammetry are low ... -
Biochemical impacts of transition metals in the king bolete (Boletus edulis)
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:166, Doctoral thesis, 2004)The present thesis investigates the reciprocal relationship between metals and wild-growing macromycetes. An inter-diciplinary approach was needed in order to reveal, on the molecular level, how these organisms respond to, ... -
Biogeochemistry of iron in Patagonian fjords and waters of the Antarctic Peninsula
(Doctoral theses at NTNU;2017:191, Doctoral thesis, 2017)Iron constitute an essential nutrient for marine life. Several metabolic processes in marine phytoplankton, are dependent on the presence of this trace element. Due to the chemistry of seawater, in certain marine ... -
Biological reductions and esterifications for the production of enantiopure secondary alcohols : chemo-enzymatic synthesis of chiral building blocks with sulphur-containing rings
(Doktoravhandlinger ved NTNU, 1503-8181, Doctoral thesis, 2003)Both enantiomers of 1-(1,3-dithian-2-yl)-2-propanol ( 5 ) 1-(1,3-dithiolan-2-yl)-2- propanol (6), and halogenated derivatives of 5 was obtained by microbial reductions and lipase catalyzed esterifications. (2S)-1-(1,3-di ... -
Carotenoid Surfactants and Transfection Agents: The Colourful Chemistry of Polyenes
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:87, Doctoral thesis, 2010)Synthetic procedures have been developed for efficient preparation of caroteinoid choline-ester analogues and phospholipids. One series of choline-esters and one series of phospholipids were based on β-apo-8’-carotenic ... -
Ceramic cell-construction materials for the electrolysis of rare earth chlorides
(Doktoravhandlinger ved NTNU, 1503-8181; 2001:15, Doctoral thesis, 2001)Production of misch metal (a mixture of rare earth metals) by electrolysis of molten rare earth chlorides invooves high temperatures and reactive liqueds. Chemical degradation of the sidelining of the cell may terminate ... -
Chemical and Spectroscopic Studies of Carotenoids and Related Compounds
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:93, Doctoral thesis, 2004)Structure elucidation of charge delocalised carotenoid mono- and dications by NMR and VIS/NIR spectroscopy. Studies of the nucleophilic reactions of these cations. Studies of the β,β-carotene-iodine complex. Isolation and ... -
Chemo-enzymatic synthesis of fluorinated carbohydrate derivatives
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:162, Doctoral thesis, 2011)The enzymatic hydrolysis of the benzoylated methyl pyranosides has been investigated using Candida rugosa lipase (CRL) as a catalyst. Hydrolyses of all substrates proceeded in a regiospecific manner at C-6. No acyl migration ... -
Comparison of Hygrometers for Monitoring of Water Vapour in Natural Gas
(Doctoral theses at NTNU;2015:21, Doctoral thesis, 2015)To be able to maintain a safe, regular and economic production and transportation of natural gas, it is crucial to be able to accurately quantify the water vapour concentration in the gas. Underestimation of the water ... -
Controlled patterning of metallic nanogaps and nanogap arrays via adhesion lithography
(Doctoral theses at NTNU;2021:181, Doctoral thesis, 2021)Existing nanofabrication methods typically rely on techniques such as optical lithography, electron-beam lithography or focused ion beam milling that enable high fidelity patterning but suffer from various limitations in ...