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  • Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential 
    Peura, Sari; Wauthy, Maxime; Simone, Domenico; Eiler, Alexander; Einarsdottir, Karolina; Rautio, Milla; Bertilsson, Stefan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Warming climate is thawing the permafrost in arctic and subarctic regions, leading to formation of thermokarst ponds. During the formation and geomorphological succession of these ponds, carbon that has been trapped in ...
  • Operando Investigations of Lithiation and Delithiation Processes in the BiVO4 Anode Material 
    Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
  • Operando Laboratory-Based Multi-Edge X-Ray Absorption Near-Edge Spectroscopy of Solid Catalysts 
    Genz, Nina; Kallio, Antti-Jussi; Oord, Ramon; Krumeich, Frank; Pokle, Anuj; Prytz, Øystein; Olsbye, Unni; Meirer, Florian; Huotari, Simo; Weckhuysen, Bert M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Laboratory-based X-ray absorption spectroscopy (XAS) and especially X-ray absorption near-edge structure (XANES) offers new opportunities in catalyst characterization and presents not only an alternative, but also a ...
  • Operando XRD studies on Bi2MoO6 as anode material for Na-ion batteries 
    Brennhagen, Anders; Cavallo, Carmen; Wragg, David Stephen; Ponniah, Vajeeston; Sjåstad, Anja Olafsen; Koposov, Alexey; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Based on the same rocking-chair principle as rechargeable Li-ion batteries, Na-ion batteries are promising solutions for energy storage benefiting from low-cost materials comprised of abundant elements. However, despite ...
  • Ophicarbonates of the Feragen Ultramafic Body, central Norway 
    Dunkel, Kristina G; Jamtveit, Bjørn; Austrheim, Håkon Olaf (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The carbonation of ultramafic rocks is a common alteration process in ophiolites and can occur in various settings. We provide the first detailed description of the carbonated peridotites (ophicarbonates) of the Feragen ...
  • Optical properties of ZnFe2O4 nanoparticles and Fe-decorated inversion domain boundaries in ZnO 
    Kjeldby, Snorre Braathen; Nguyen, Phuong Dan; García Fernández, Javier; Haug, K.; Galeckas, Augustinas; Jensen, Ingvild Julie Thue; Thøgersen, Annett; Vines, Lasse; Prytz, Øystein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The maximum efficiency of solar cells utilizing a single layer for photovoltaic conversion is given by the single junction Shockley–Queisser limit. In tandem solar cells, a stack of materials with different band gaps ...
  • Optical signatures of single ion tracks in ZnO 
    Vasquez, Geraldo Cristian; Johansen, Klaus Magnus H; Galeckas, Augustinas; Vines, Lasse; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The optical properties of single ion tracks have been studied in ZnO implanted with Ge by combining depth-resolved hyperspectral cathodoluminescence (CL) and photoluminescence (PL) spectroscopy techniques. The results ...
  • Optimizing an adult tacrolimus population pharmacokinetic model and extrapolating it to paediatric renal transplant recipients 
    Sandbakken, Karoline (Master thesis / Masteroppgave, 2023)
  • Order-to-Disorder Transition and Hydrogen Bonding in the Jahn-Teller Active NH4CrF3 Fluoroperovskite 
    Fjellvåg, Øystein Slagtern; Gonano, Bruno; Bernal, Fabian Leonardo Martinez; Amedi, Salah Bra; Lyu, Jike; Pomjakushin, Vladimir; Medarde, Marisa; Chernyshov, Dmitry; Marshall, Kenneth; Valldor, Björn Martin; Fjellvåg, Helmer; Hauback, Bjørn Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    Large quantities of high-purity NH4CrF3 have been synthesized using a wet-chemical method, and its structural chemistry and magnetic properties are investigated in detail for the first time. NH4CrF3 is a tetragonal ...
  • Organic-rich shale caprock properties of potential CO2 storage sites in the northern North Sea, offshore Norway 
    Rahman, Jamil Ur; Fawad, Manzar; Mondol, Nazmul Haque (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Assessment of the geomechanical properties of organic-rich shale caprocks is critical for a successful CO2 storage into a saline aquifer. In this study, we investigated the geochemical properties of the organic-rich shale ...
  • Origin of enhanced conductivity in low dose ion irradiated oxides 
    Borgersen, Jon; Karsthof, Robert Michael; Rønning, Vegard; Vines, Lasse; Von Wenckstern, Holger; Grundmann, Marius; Kuznetsov, Andrej Yu.; Johansen, Klaus Magnus Håland (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Significant resistivity variations have previously been observed in oxides subjected to relatively low ion irradiation doses, nominally insufficient to generate the amount of bulk defects needed to explain the phenomena. ...
  • Origin of the counterintuitive dynamic charge in the transition metal dichalcogenides 
    Pike, Nicholas; Van Troeye, Benoit; Dewandre, Antoine; Petretto, Guido; Gonze, Xavier; Rignanese, Gian-Marco; Verstraete, Matthieu (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    espite numerous studies of transition metal dichalcogenides, the diversity of their chemical bonding characteristics and charge transfer is not well understood. Based on density functional theory we investigate their static ...
  • Outcrop scale mixing enhanced by permeability variations: the role of stationary and travelling waves of high saturation indices 
    Koehn, Daniel; Kelka, Ulrich; Toussaint, Renaud; Siegel, Coralie; Mullen, Gary; Boyce, Adrian; Piazolo, Sandra (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract To study the ore mineralization at the outcrop scale we merge an advection–diffusion simulation with the geochemical software iphreeqc to model the mixing of two realistic fluids. We simulate the infiltration ...
  • Oxidation-enhanced annealing of implantation-induced Z(1/2) centers in 4H-SiC: Reaction kinetics and modeling 
    Løvlie, Lars Sundnes; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    High-purity epitaxial layers of n-type 4H-SiC have been implanted with 4.3-MeV Si ions to a dose of 3 × 108 cm−2 and then subjected to dry isothermal oxidation at temperatures between 1050 and 1175 °C. Analysis of the ...
  • Oxygen permeability and surface kinetics of composite oxygen transport membranes based on stabilized δ-Bi2O3 
    Emhjellen, Linn Katinka Susanne Shi; Xing, Wen; Li, Zuoan; Haugsrud, Reidar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Composite ceramic membranes based on the ionic conducting Tm-stabilized δ-Bi2O3 (BTM) and the electronic conducting (La0.8Sr0.2)0.99MnO3-δ (LSM) exhibit among the highest oxygen flux values reported for Bi2O3-based membranes. ...
  • PathTracer: High-sensitivity detection of differential pathway activity in tumours 
    Nygård, Ståle; Lingjærde, Ole Christian; Caldas, Carlos; Hovig, Eivind; Børresen-Dale, Anne-Lise; Helland, Åslaug; Haakensen, Vilde Drageset (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Gene expression profiling of tumours is an important source of information for cancer patient stratification. Detecting subtle alterations of gene expression remains a challenge, however. Here, we propose a novel tool for ...
  • Perineuronal nets stabilize the grid cell network 
    Christensen, Ane Charlotte; Lensjø, Kristian Kinden; Lepperød, Mikkel Elle; Dragly, Svenn-Arne; Sutterud, Hallvard; Blackstad, Jan Sigurd; Fyhn, Marianne; Hafting, Torkel (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Grid cells are part of a widespread network which supports navigation and spatial memory. Stable grid patterns appear late in development, in concert with extracellular matrix aggregates termed perineuronal nets (PNNs) ...
  • Phase and Orientation Control of NiTiO3 Thin Films 
    Bratvold, Jon E.; Fjellvåg, Helmer; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Subtle changes in the atomic arrangement of NiTiO3 in the ilmenite structure affects its symmetry and properties. At high temperatures, the cations are randomly distributed throughout the structure, resulting in the corundum ...
  • Phenotype-specific differences in polygenicity and effect size distribution across functional annotation categories revealed by AI-MiXeR 
    Shadrin, Alexey A.; Frei, Oleksandr; Smeland, Olav Bjerkehagen; Bettella, Francesco; O'Connell, Kevin; Gani, Osman; Bahrami, Shahram; Uggen, Tea Kristiane Espeland; Djurovic, Srdjan; Holland, Dominic; Andreassen, Ole; Dale, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Abstract Motivation Determining the relative contributions of functional genetic categories is fundamental to understanding the genetic etiology of complex human traits and diseases. Here, ...
  • Phosphorus availability promotes bacterial DOC-mineralization, but not cumulative CO2-production 
    Allesson, Lina; Andersen, Tom; Dörsch, Peter; Eiler, Alexander; Wei, Jing; Hessen, Dag Olav (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The current trend of increasing input of terrestrially derived dissolved organic carbon (DOC) to boreal freshwater systems is causing increased levels of carbon dioxide (CO 2 ) supersaturation and degassing. Phosphorus (P) ...