Institutt for kjemi
Recent Submissions
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Nitrous oxide and hydrogen sulfide production in sludge from a recirculating aquaculture system (RAS)
(Master thesis, 2021)Recirculating aquaculture systems (RAS) blir mer og mer vanlig, som svar på de økologiske og økonomiske problemene som finnes i oppdrettsnæringen. Sjøvann brukt i marine RAS er rikt på sulfat, og kombinert med organisk ... -
Peltier effects in lithium-ion battery modeling
(Peer reviewed; Journal article, 2021)A high battery temperature has been shown to be critical for lithium-ion batteries in terms of performance, degradation, and safety. Therefore, a precise knowledge of heat sources and sinks in the battery is essential. We ... -
Choked liquid flow in nozzles: crossover from heterogeneous to homogeneous cavitation and insensitivity to depressurization rate
(Peer reviewed; Journal article, 2021)The critical mass flow rate is the maximum flow rate that can pass through a constrained geometry such as a nozzle. For liquid CO2, it has been shown that homogeneous relaxation models systematically underpredict the ... -
Product formation during discharge: a combined modelling and experimental study for Li–O2 cathodes in LiTFSI/DMSO and LiTFSI/TEGDME electrolytes
(Peer reviewed; Journal article, 2021)Li–air or Li–O2 batteries are a promising energy storage technology due to the potentially high energy density. However, significant challenges related to reversible charge/discharge of these cells need to be solved. The ... -
How do different nitrogen application levels and irrigation practices impact biological nitrogen fixation and its distribution in paddy system?
(Peer reviewed; Journal article, 2021)Background and aims Biological nitrogen fixation (BNF) in paddy systems is impacted by nitrogen application levels and irrigation strategies, but the extent to which these factors influence BNF and its distribution in ... -
Isolation and determination of flavonoids in Herniaria incana
(Master thesis, 2021)Mange arter fra Herniaria slekten har blitt grundig undersøkt p˚a grunn av deres potensiale i medisinsk bruk. Undersøkelser fra H. hirsuta og H. glabra har vist innhold av flavonoider med antioksidativ og antiinflammatorisk ... -
Improved lifetime and stability of copper species in hierarchical, copper-incorporated CuSAPO-34 verified by catalytic model reactions
(Peer reviewed; Journal article, 2021)The first successful synthesis of hierarchical CuSAPO-34 (3.9 wt% Cu) is reported using the polymer Pluronic F127 as a mesoporous structure directing agent (SDA). X-Ray absorption spectroscopy (XAS) revealed single site ... -
Review - Reversible heat effects in cells relevant for lithium-ion batteries
(Peer reviewed; Journal article, 2021)We review measurements of reversible heat effects in lithium-ion batteries, i.e. entropy changes and Seebeck coefficients of cells with relevant electrodes. We show how to compute the Peltier heat of battery electrodes ... -
Transport coefficients and pressure conditions for growth of ice lens in frozen soil
(Peer reviewed; Journal article, 2021)In this paper, the transport of sub-cooled water across a partially frozen soil matrix (frozen fringe) caused by a temperature difference over the fringe, is described using non-equilibrium thermodynamics. A set of coupled ... -
Thermal transport in polyethylene: The effect of force fields and crystallinity
(Peer reviewed; Journal article, 2021)In this article, we study the local structure and heat transfer properties (thermal conductivity and interfacial conductance) in model semi-crystalline Polyethylene (PE) by non-equilibrium molecular dynamics. We compare ... -
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 ... -
Assessment of the oxidative stress biomarkers of 8-hydroxy-2'-deoxyguanosine and o,o'-dityrosine in dorsal fin and liver tissue from Atlantic salmon Parr in land-based recirculating aquaculture systems (RAS)
(Master thesis, 2021)Sammendrag Produksjonen av akvakultur øker i verden, og Norge er det landet som produserer mest laks. Produksjonen i sjøen krever riktig temperatur og kan føre til forurensing i fjordene. Store kostnader med transport ... -
Climate change mitigation effects: How do potential CO2 leaks from a sub-seabed storage site in the Norwegian Sea affect Astarte sp. bivalves?
(Peer reviewed; Journal article, 2021)Carbon capture and storage (CCS) is one of the most promising mitigation strategies for reducing the emissions of carbon dioxide (CO2) to the atmosphere and may substantially help to decelerate global warming. There is an ... -
Rapid Determination of Per- and Polyfluoroalkyl Substances (PFAS) in Harbour Porpoise Liver Tissue by HybridSPE®–UPLC®–MS/MS
(Journal article; Peer reviewed, 2021)A rapid hybrid solid phase extraction (HybridSPE®) protocol tailored to ultra-performance liquid chromatography–electrospray ionization tandem mass spectrometry (UPLC®–ESI–MS/MS) analysis was developed for the determination ... -
Preventing brominated flame retardants from occurring in recycled expanded polystyrene: comparing Norwegian visual sorting with advanced screening methods
(Peer reviewed; Journal article, 2021)There is international interest to increase recycling rates of expanded polystyrene foam (EPS). Extensive use of brominated flame retardants (BFRs), however, presents a hinder to this. If uncontrolled, hazardous BFRs could ... -
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 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 ... -
The occurrence and mass loadings of bisphenols, benzophenones and brominated flame retardants in Norwegian sewage sludge
(Master thesis, 2021)Kloakkslam er regnet som et avfallsprodukt, men utgjør også en nyttig ressurs som gjødsel i landbruket på grunn av det høye innholdet av næringsstoffer. Renseanlegg for avløpsvann er midlertidig også et sentralt oppsamlingssted ... -
The Occurrence of novel and legacy PFASs in feathers from Scopoli's Shearwater (Calonectris diomedea).
(Master thesis, 2021)Per- og polyfluoroalkyl substanser (PFAS) er en familie av kjemikaler som har mange ulike bruksområder. Blant annet i olje- og vannavstøtende produkter, brannskum, skismøring, og i fluoropolymer-produksjon. Bruken av PFASer ... -
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 ...
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