Blar i Fakultet for naturvitenskap (uspesifisert) på utgivelsesdato
Viser treff 21-40 av 76
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Plastic Deformation at Moderate Temperatures of 6XXX-series Aluminium Alloys
(Dr. ingeniøravhandling, 0809-103X; 2002:12, Doctoral thesis, 2002)The present work has been carried out in order to investigate Al-Mg-Si alloys that are deformed at moderate temperatures. These temperatures are in the range between 200 C and 300 C. Also some experiments are performed at ... -
Rapid Solidification of AB5 Hydrogen Storage Alloys
(Dr.ingeniøravhandling, 0809-103X; 2002:7, Doctoral thesis, 2002)This doctoral thesis is concerned with rapid solidification of AB5 materials suitable for electrochemical hydrogen storage. The primary objective of the work has been to characterise the microstructure and crystal structure ... -
Investigation of the Chemistry of Liquid H2S Scavengers
(Dr.ingeniøravhandling, 0809-103X; 2002:70, Doctoral thesis, 2002)1,3,5-Tris(2-hydroxyethyl)-1,3,5-triazinane (1), in the industry often referred to as "Triazine", is a widely used liquid H2S scavenger. The goal of the work presented in this dissertation was to examine the chemistry of ... -
Evolution of Alpha Phase Alumina in Agglomerates upon Addition to Cryolitic Melts
(Dr. ingeniøravhandling, 0809-103X; 2002:50, Doctoral thesis, 2002)Rapid dissolution of alumina upon addition to the cryolitic melt is crucial for the modern Hall-Heroult process for aluminium production. The formation of slow - dissolving alumina agglomerates may be detrimental, and ... -
Stereoselective Transformations of Chiral Amines
(Dr. ingeniøravhandling, 0809-103X; 2002:8, Doctoral thesis, 2002)Enantiomerically pure amines and alcohols are particularly important synthons for the preparation of pharmaceuticals and agrochemicals. Notwithstanding the advances that have been achieved in asymmetric synthesis, resolution ... -
Metabolism and function of β-1,3-glucan in marine diatoms
(Dr.ingeniøravhandling, 0809-103X; 2002:4, Doctoral thesis, 2002)β-1,3-Glucan (chrysolaminaran) is the principal storage polysaccharide in diatoms (Bacillariophyceae), the major primary producers in the sea. The glucan generally contributes a substantial fraction of the algal biomass, ... -
Concentrations and speciation of Cu, Zn, Cd, and Al in mine-polluted Norwegian rivers : influence of main water parameters and consequences to fish
(Doctoral thesis, 2002)This thesis presents concentration and speciation data for Cu, Zn, Cd, and Al in eight highland rivers and streams in the Røros area, central Norway. About 16 sampling campaigns were performed before, during and after ... -
Characterisation and optimisation of the polymer electrolyte fuel cell
(Dr. ingeniøravhandling, 0809-103X; 2002:37, Doctoral thesis, 2002)This thesis presents work performed on five subjects of the polymer fuel cell: • A polymer fuel cell test-facility was optimised. A fuel cell housing was designed and built, enabling measurements of ocal fuel cell ... -
Degradation of polymeric and particulate organic carbon in biofilms
(Dr. ingeniøravhandling, 0809-103X; 2003:101, Doctoral thesis, 2003)Polymeric and particulate organic carbon (POM) are fundamental compounds in the global cycling of carbon, and constitute significant amounts of BOD in municipal wastewater. The main objective of this work is to study ... -
Work Hardening and Mechanical Anisotropy of Aluminium Sheets and Profiles
(Dr. ingeniøravhandling, 0809-103X; 2003:105, Doctoral thesis, 2003)The processing of aluminium alloys from casting to end product is associated with a large number of metallurgical phenomena. In order to further improve and optimise process routes and alloys, a thorough understanding of ... -
Colloidal Wood Resin: Analyses and Interactions
(Dr. ingeniøravhandling, 0809-103X; 2003:63, Doctoral thesis, 2003)This thesis presents studies of the interactions between suspended particles and dissolved and colloidal substances (DCS) in process water. The main focus has been to determine if colloidal wood resin is adsorbed by suspended ... -
Controllability analysis for process and control system design
(Dr. ingeniøravhandling, 0809-103X; 2003:76, Doctoral thesis, 2003)Controllability is the ability of a process to achieve acceptable performance, and in this thesis we use controllability analysis in the design of buffer tanks, feedforward controllers, and multivariable controllers such ... -
Lepton flavour violation in minimal supersymmetric extensions to the Standard model
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:22, Doctoral thesis, 2003) -
Equal channel angular pressing (ECAP) of AA6082 : mechanical properties, texture and microstructural development
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:129, Doctoral thesis, 2004)This thesis deals with the concept of ECAP applied to a commercial Al Mg-Si alloy (AA6082.50). A detailed analysis of the strains introduced by ECAP in a single passage through the die has been made, based on direct ... -
Periodate oxidised chitosans : structure and solution properties
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:126, Doctoral thesis, 2004)Chitosans are considered promising for a wide range of applications, and especially in the biomedical and pharmaceutical field numerous possible applications are being investigated. However, some of the properties of ... -
Olfactory coding and olfactory learning of plant odours in heliothine moths. An anatomical, physiological and behavioral study of three related species (Heliothis virescens, Helicoverpa armigera and Helicoverpa assulta)
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:83, Doctoral thesis, 2004) -
Application of high-resolution NMR spectroscopy in metabolic studies of the eye
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:164, Doctoral thesis, 2004)High-resolution NMR spectroscopy has, during the last two decades, had an increasing impact in biological and biochemical research. Rapid advances have led to improvements in sensitivity and dispersion of the spectra and ... -
Rheology and Reactivity of Cementitious Binders with Plasticizers
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:189, Doctoral thesis, 2005)The rheological behaviour of cementitious pastes has been studied by various means. Six different cements have been studied in main parts of the work and all of them have been characterized according to the Rietveld method ... -
Development and modification of glass membranes for aggreessive gas separations
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:24, Doctoral thesis, 2005)Chlorine as a chemical is widespread in industry and found in a great variety of processes ranging from water purification to plastic production. In this thesis, a magnesium production factory was chosen as an example ... -
Electrocatalysts for the oxygen evolution electrode in water electrolysers using proton exchange membranes : synthesis and characterisation
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:96, Doctoral thesis, 2005)Electrocatalysts based on IrO2 have been synthesised and characterised using a wide range of techniques. These oxide materials were primarily developed as oxygen evolution electrocatalysts for proton exchange membrane (PEM) ...