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o-Quinonoid Heterocycles: Synthesis and Crystal Structure of 2,3-Dicyano-5,7-bismethylthieno[3,4-b]pyrazine
(Journal article; Peer reviewed, 2007)2,3-Dicyano-5,7-bismethylthieno[3,4-b]pyrazine (5), has been obtained as a minor product from reactions of S-nucleophiles with 5,6-di(1-bromoethyl)pyrazine-2,3- dicarbonitrile (3), or from a condensation of 4-hydroxy-2 ... -
Observation of Ultrafast Intersystem Crossing in Thymine by Extreme Ultraviolet Time-Resolved Photoelectron Spectroscopy
(Journal article; Peer reviewed, 2019)We studied the photoinduced ultrafast relaxation dynamics of the nucleobase thymine using gas-phase time-resolved photoelectron spectroscopy. By employing extreme ultraviolet pulses from high harmonic generation for ... -
Occurence of bisphenols and benzophenone UV-filters in plastic waste: A circular economy perspective
(Master thesis, 2021)Plastikk har blitt et utrolig viktig materiale i forbruksvarer slik som matembalasje, men kan skape problemer med avfall. I 2018 ble 17.8 millioner tonn med brukt plastembalasje samplet inn. Resirkulering er en måte å ... -
Occurrence and sorption behaviour of bisphenols and benzophenone UV-filters in e-waste plastic and vehicle fluff
(Journal article; Peer reviewed, 2021)Bisphenols and benzophenone UV-filters are hazardous, high production volume chemicals. There is concern that these contaminants could leach into the environment or be recycled into new products during waste management. ... -
Occurrence of Bisphenols and Benzophenone UV Filters in White-Tailed Eagles (Haliaeetus albicilla) from Smøla, Norway
(Journal article; Peer reviewed, 2021)There is a growing concern about the occurrence of bisphenols and benzophenone UV filters in natural ecosystems, while data are limited regarding their actual occurrence in wildlife species, especially in raptors. In this ... -
Occurrence of brominated and organophosphate flame retardants in Norwegian wastewater
(Master thesis, 2021)Bromerte og fosfororganiske flammehemmere (BFR og OPFR) brukes for å gjøre produkter mindre brannfarlige, og har sett økt bruk i takt med utbredelsen av syntetiske, lettantennelige polymerer de siste tiårene. Høye nivåer ... -
Occurrence of legacy and novel Per- and Polyfluoroalkyl Substances (PFAS) in plastics, e-waste plastics and mobile phone waste
(Master thesis, 2021)Bærekraftig håndtering av plast fra e-avfall er et felt som må utvikles og forskes på, ettersom elektrisk og elektronisk avfall, også referert til som e-avfall, er den mest voksende avfallsgruppen på jorden. Både e-avfall ... -
Occurrence of novel and legacy Per- and polyfluoroalkyl substances (PFAS) in selected aqueous and environmental matrices.
(Master thesis, 2021)Per- og polyfluoroalkyl substanser (PFAS) har blitt brukt i betydelig grad siden 1950-tallet grunnet deres amfifile egenskaper. I løpet av de siste tiårene har forskere funnet flere av disse stoffene til å inneha egenskaper ... -
Occurrence of organophosphate flame retardants (OPFRs) in baby foodstuffs
(Master thesis, 2021)Organofosfat flammehemmere (OPFRer) har det siste tiåret fått økt oppmerksomhet, ettersom de erstattet bruken av polybromerte difenyletere (PBDEer) som flammehemmere etter bruken av disse ble forbudt i 2009. Siden flere ... -
Oil spill forensics - Identification of possible sources for oil spills found along the coastline of mid-Norway - An experimental study combining GC-MS analysis and multivariate statistics.
(Master thesis, 2016)This thesis aims to characterize 112 weathered oil samples collected on shore, at 18 islands, along the coastline of Mid-Norway during a time period of 2011-2015. Emphasis have been made on characterizing samples by three ... -
Oil spill forensics - Identification of Sources for Illegal Oil Spills. A New Approach Combining Multivariate Statistics and Gas Chromatography and Mass-Spectrometry (GC-MS)
(Master thesis, 2016)The CEN/TR 15522-2:2012 standard is most widely used in Europe for oil spill fingerprinting purposes, which is based on comparison of specific source biomarkers by GC MS. This thesis was mainly aimed at establishing and ... -
Oil spill forensics: Identification of sources for oil spills by using data generated by GC-MS and ICP-MS combined with multivariate statistics and the COSIWeb database
(Master thesis, 2014)This work has been a preliminary study, aimed at investigating whether or not trace metal Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) analysis could be a viable tool in the oil spill investigation toolbox, after ... -
On exergy analysis and entropy production minimisation in industrial ecology
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:151, Doctoral thesis, 2006)The objective of this thesis is to improve the basis for applying industrial ecology to the evaluation of material and energy resource use and transformation in industrial systems. The underlying hypothesis was that when ... -
On the electrokinetic characterization of charged polymeric membranes by transversal streaming potential
(Peer reviewed; Journal article, 2021)The effect of a transmembrane pressure on the electrokinetic properties of different polymeric charged membranes is analysed. Electrokinetic characterization can involve the application of increasing or decreasing pressure ... -
On the relation between the Langmuir and thermodynamic flux equations
(Journal article; Peer reviewed, 2014-01-22)Despite its approximative nature, the Langmuir theory has shown to be a very successful approach to describe experimental adsorption isotherms. Langmuir kinetics is based on systems of non-interacting particles that can ... -
One-pot Conversion of Biomass to Ethylene Glycol, Propylene Glycol and other Polyols over Carbon Supported Tungsten Catalysts
(Master thesis, 2013)Tungsten carbide and nickel promoted tungsten oxide catalysts supported on CNTs and AC were prepared for the catalytic conversion of cellulose towards polyols, particularly EG. Incipient wetness impregnation was used for ... -
Onsager-symmetry obeyed in athermal mesoscopic systems: Two-phase flow in porous media
(Peer reviewed; Journal article, 2020)We compute the fluid flow time correlation functions of incompressible, immiscible two-phase flow in porous media using a 2D network model. Given a properly chosen representative elementary volume, the flow rate distributions ... -
An Open Access Data Set Highlighting Aggregation of Dyes on Metal Oxides
(Peer reviewed; Journal article, 2020)The adsorption of a dye to a metal oxide surface such as TiO2, NiO and ZnO leads to deprotonation and often undesirable aggregation of dye molecules, which in turn impacts the photophysical properties of the dye. While ... -
Optical rotation from coupled cluster and density functional theories
(Doctoral theses at NTNU; 2018:31, Doctoral thesis, 2018)Chiral compounds are of fundamental importance in medical chemistry, biochemistry, and industry. Optical rotation, which is one of the most well-known optical responses of chiral molecules to an electromagnetic field, is ... -
Optically Active Surfactants from the Tartaric Acids. Synthesis and Properties
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:84, Doctoral thesis, 2009)