Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 543-562 of 838

  • 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) ...
  • Photoactive Zr-aromatic hybrid thin films made by molecular layer deposition 
    Rogowska, Melania; Bruzell, Ellen Merete; Valen, Håkon; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The principle of antimicrobial photodynamic therapy (PDT) is appealing because it can be controlled by an external light source and possibly the use of durable materials. However, to utilise such surfaces requires a process ...
  • Photocatalytic generation of gas phase reactive oxygen species from adsorbed water: Remote action and electrochemical detection 
    Sun, Xinwei; Xu, Kaiqi; Chatzitakis, Athanasios Eleftherios; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The improvement of indoor environments is of great importance as it can significantly improve human health, comfort and productivity. Herein, different forms of TiO2 nanorods were used as the photocatalyst for generation ...
  • Photoluminescence intensity of Cu-doped ZnO modulated via defect occupancy by applying electric bias 
    Ho, Lok-Ping; Younas, Muhammad; Borgersen, Jon; Khan, Rao Tahir Ali; Rezvani, Seyed Javad; Pollastri, Simone; Akhtar, Muhammad Javed; Nadeem, Muhammad; Huang, Dong; Shi, Ying-Li; Kuznetsov, Andrej; Ling, Francis Chi-Chung (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    Abstract Discovering multifunctional materials is of paramount importance for advancing the science and technology. Herein, we report on an optical phenomenon modulated by an electrical process that happened at ...
  • Physical properties of Ruddlesden-Popper (n = 3) nickelate: La4Ni3O10 
    Kumar, Susmit; Fjellvåg, Øystein; Sjåstad, Anja Olafsen; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Nickelates, just like their isoelectronic cousins (the cuprate superconductors), are candidates for high temperature superconductivity. As charge density waves (CDW) and superconductivity might share a similar microscopic ...
  • Plasma linoleic acid levels and cardiovascular risk factors: results from the Norwegian ACE 1950 Study 
    Chandra, Anupam; Røsjø, Helge; Svensson, My Hanna Sofia; Vigen, Thea; Ihle-Hansen, Håkon; Orstad, Eivind Bjørkan; Rønning, Ole M.; Lyngbakken, Magnus; Nygård, Ståle; Berge, Trygve; Schmidt, Erik Berg; Omland, Torbjørn; Tveit, Arnljot; Eide, Ivar Anders (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Background A high intake of linoleic acid (LA), the major dietary polyunsaturated fatty acid (PUFA), has previously been associated with reduced cardiovascular (CV) morbidity and mortality in observational studies. ...
  • Plasmonic properties of aluminium nanowires in amorphous silicon 
    Thøgersen, Annett; Jensen, Ingvild Julie Thue; Belle, Branson Delano; Stange, Marit Synnøve Sæverud; Reinertsen, Vilde Mari; Kjeldstad, Torunn; Prytz, Øystein; Monakhov, Eduard; Kepaptsoglou, Demie (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Plasmonic structures can help enhance optical activity in the ultraviolet (UV) region and therefore enhancing photocatalytic reactions and the detection of organic and biological species. Most plasmonic structures are ...
  • Polygenic overlap and shared genetic loci between loneliness, severe mental disorders, and cardiovascular disease risk factors suggest shared molecular mechanisms 
    Rødevand, Linn; Bahrami, Shahram; Frei, Oleksandr; Lin, Aihua; Gani, Osman; Shadrin, Alexey A.; Smeland, Olav Bjerkehagen; O'Connell, Kevin; Elvsåshagen, Torbjørn; Winterton, Adriano; Quintana, Daniel; Hindley, Guy Frederick Lanyon; Werner, Maren Caroline Frogner; Djurovic, Srdjan; Dale, Anders Martin; Lagerberg, Trine Vik; Steen, Nils Eiel; Andreassen, Ole Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Abstract Clinical and epidemiological evidence suggest that loneliness is associated with severe mental disorders (SMDs) and increases the risk of cardiovascular disease (CVD). However, the mechanisms underlying the ...
  • Polygenic overlap with body-mass index improves prediction of treatment-resistant schizophrenia 
    O'Connell, Kevin Sean; Koch, Elise; Lenk, Hasan Cagin; Akkouh, Ibrahim Ahmed; Hindley, Guy Frederick Lanyon; Jaholkowski, Piotr Pawel; Smith, Robert Løvsletten; Holen, Børge; Shadrin, Alexey; Frei, Oleksandr; Smeland, Olav Bjerkehagen; Steen, Nils Eiel; Dale, Anders M; Molden, Espen; Djurovic, Srdjan; Andreassen, Ole (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Treatment resistant schizophrenia (TRS) is characterized by repeated treatment failure with antipsychotics. A recent genome-wide association study (GWAS) of TRS showed a polygenic architecture, but no significant loci were ...