Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 470-489 of 838

  • Mechanisms of Landslide Destabilization Induced by Glacier-Retreat on Tungnakvíslarjökull Area, Iceland 
    Lacroix, Pascal; Belart, Joaquin M. C.; Berthier, Etienne; Sæmundsson, Þorsteinn; Jónsdóttir, Kristín (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The massive worldwide deglaciation leads to more frequent slope instabilities in mountainous terrains. The physical processes leading to such destabilizations are poorly constrained due to little monitoring of dynamic ...
  • Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement 
    Rodriguez Rodriguez, Jesus; Liberto, Teresa; Barentine, Catherine; Dysthe, Dag Kristian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Calcium carbonate cements have been synthesized by mixing amorphous calcium carbonate and vaterite powders with water to form a cement paste and study how mechanical strength is created during the setting reaction. In-situ ...
  • Mechanistic Insights in the Catalytic Hydrogenation of CO2 over Pt Nanoparticles in UiO-67 Metal-Organic Frameworks 
    Pulumati, Sri Harsha; Sannes, Dag Kristian; Jabbour, Christia R.; Mandemaker, Laurens D. B.; Weckhuysen, Bert M.; Olsbye, Unni; Nova Flores, Ainara; Skúlason, Egill (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Metal nanoparticles (NPs) encapsulated within Zr-based UiO-67 metal–organic frameworks (MOFs) have increased selectivity toward methanol in CO2 reduction reactions. However, the reduction mechanism in these systems remains ...
  • Memristive and Memory Impedance Behavior in a Photo-Annealed ZnO–rGO Thin-Film Device 
    Cardarilli, Gian; Khanal, Gaurav; Nunzio, Luca; Re, Marco; Fazzolari, Rocco; Kumar, Rajesh (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    An oxygen-rich ZnO-reduced graphene oxide (rGO) thin film was synthesized using a photo-annealing technique from zinc precursor (ZnO)–graphene oxide (GO) sol–gel solution. X-ray diffraction (XRD) results show a clear ...
  • Mercury in air and soil on an urban-rural transect in East Africa 
    Nipen, Maja; Jørgensen, Susanne Jøntvedt; Bohlin-Nizzetto, Pernilla; Borgå, Katrine; Breivik, Knut; Mmochi, Aviti J; Mwakalapa, Eliezer; Quant, M. Isabel; Schlabach, Martin; Vogt, Rolf David; Wania, Frank (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    There are large knowledge gaps concerning concentrations, sources, emissions, and spatial trends of mercury (Hg) in the atmosphere in developing regions of the Southern Hemisphere, particularly in urban areas. Filling these ...
  • Metal Oxide Thin-Film Heterojunctions for Photovoltaic Applications 
    Nordseth, Ørnulf; Kumar, Raj; Bergum, Kristin; Fara, Laurentiu; Dumitru, Constantin; Craciunescu, Dan; Dragan, Florin; Chilibon, Irinela; Monakhov, Edouard; Foss, Sean Erik; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Silicon-based tandem solar cells incorporating low-cost, abundant, and non-toxic metal oxide materials can increase the conversion efficiency of silicon solar cells beyond their conventional limitations with obvious economic ...
  • Methane Producing and Oxidizing Microorganisms Display a High Resilience to Drought in a Swedish Hemi-Boreal Mire 
    White, J.D.; Ahrén, D.; Ström, L.; Kelly, J.; Klemedtsson, L.; Keane, B.; Parmentier, Frans-Jan W. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract An increased frequency of droughts due to anthropogenic climate change can lead to considerable stress for soil microorganisms and their functioning within northern peatlands. A better understanding of the diversity ...
  • Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes 
    Touni, Aikaterini; Liu, Xin; Kang, Xiaolan; Papoulia, Chrysanthi; Pavlidou, Eleni; Lambropoulou, Dimitra; Tsampas, Mihalis; Chatzitakis, Athanasios; Sotiropoulos, Sotiris (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Optimized Pt-based methanol oxidation reaction (MOR) anodes are essential for commercial direct methanol fuel cells (DMFCs) and methanol electrolyzers for hydrogen production. High surface area Ti supports are known to ...
  • Micro- And nano-porosity of the active Alpine Fault zone, New Zealand 
    Kirilova, Martina; Toy, Virginia; Sauer, Katrina; Renard, Francois; Gessner, Klaus; Wirth, Richard; Xiao, Xianghui; Matsumura, Risa (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Porosity reduction in rocks from a fault core can cause elevated pore fluid pressures and consequently influence the recurrence time of earthquakes. We investigated the porosity distribution in the New Zealand's Alpine ...
  • Microcalorimetry on Cu-MCM-22 Reveals Structure-Activity Relationships for the Methane-to-Methanol Reaction 
    Kvande, Karoline; Mawanga, Moses; Prodinger, Sebastian; Solemsli, Bjørn Gading; Yang, Jia; Olsbye, Unni; Beato, Pablo; Blekkan, Edd Anders; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    With a stepwise mechanism for direct methane activation to methanol (MTM) over Cu-zeolites, it is possible to produce methanol with high selectivity. With this study, we apply adsorption/desorption experiments with ...
  • Microstructural Evolution of Amphibole Peridotites in Åheim, Norway, and the Implications for Seismic Anisotropy in the Mantle Wedge 
    Jung, Sejin; Jung, Haemyeong; Austrheim, Håkon Olaf (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The microstructure of amphibole peridotites from Åheim, Norway were analyzed to understand the evolution of the lattice-preferred orientation (LPO) of olivine throughout the Scandian Orogeny and its implication for the ...
  • Microstructure and electrochemical behavior of layered cathodes for molten carbonate fuel cell 
    Ćwieka, K.; Lysik, A.; Wejrzanowski, T.; Norby, Truls Eivind; Xing, Wen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    In the present paper, we demonstrate how modifications of the microstructure and the chemical composition can influence the electrochemical behavior of cathodes for molten carbonate fuel cells (MCFCs). Based on our experience, ...
  • Migration of Ga vacancies and interstitials in β-Ga2 O3 
    Frodason, Ymir Kalmann; Varley, Joel B.; Johansen, Klaus Magnus H; Vines, Lasse; Van De Walle, Chris G. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Pathways and energy barriers for the migration of Ga vacancies (VGa) and Ga interstitials (Gai) in β−Ga2O3 are explored using hybrid functional calculations and the nudged elastic band method. Considering β−Ga2O3 as primarily ...
  • MIMO Geometry and Antenna Design for High Capacity and Improved Coverage in mm-Wave Systems 
    Cella, Tommaso; Orten, Pål; Hjelmstad, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    We show a way to optimize the capacity and at the same time achieve high coverage in LOS for a mm-wave system indoor. We optimize MIMO with regard to maximum Shannon capacity for a pure LOS channel. We describe the general ...
  • Minimal model for slow, sub-Rayleigh, supershear, and unsteady rupture propagation along homogeneously loaded frictional interfaces 
    Thøgersen, Kjetil; Sveinsson, Henrik Andersen; Amundsen, David Skålid; Scheibert, Julien; Renard, Francois; Malthe-Sørenssen, Anders (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    In nature and experiments, a large variety of rupture speeds and front modes along frictional interfaces are observed. Here, we introduce a minimal model for the rupture of homogeneously loaded interfaces with velocity ...
  • MirGeneDB 2.0: the metazoan microRNA complement 
    Fromm, Bastian; Domanska, Diana Ewa; Høye, Eirik; Ovchinnikov, Vladimir; Kang, Wenjing; Aparicio-Puerta, Ernesto; Johansen, Morten; Flatmark, Kjersti; Mathelier, Anthony; Hovig, Eivind; Hackenberg, Michael; Friedländer, Marc R.; Peterson, Kevin J. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Small non-coding RNAs have gained substantial attention due to their roles in animal development and human disorders. Among them, microRNAs are special because individual gene sequences are conserved across the animal ...
  • MirGeneDB 2.1: toward a complete sampling of all major animal phyla 
    Fromm, Bastian; Høye, Eirik; Domanska, Diana; Zhong, Xiangfu; Aparicio-Puerta, Ernesto; Ovchinnikov, Vladimir; Umu, Sinan Ugur; Chabot, Peter J; Kang, Wenjing; Aslanzadeh, Morteza; Marmol-Sanchez, Emilio; Urgese, Gianvito; Johansen, Morten; Hovig, Eivind; Hackenberg, Michael; Friedländer, Marc R.; Peterson, Kevin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract We describe an update of MirGeneDB, the manually curated microRNA gene database. Adhering to uniform and consistent criteria for microRNA annotation and nomenclature, we substantially expanded MirGeneDB ...
  • Missense mutation Q384K in the APOB gene affecting the large lipid transfer module of apoB reduces the secretion of apoB-100 in the liver without reducing the secretion of apoB-48 in the intestine 
    Strøm, Thea Bismo; Asprusten, Emil Andreas; Lærdahl, Jon Kristen; Øygard, Irene Waal; Hussain, M. Mahmood; Bogsrud, Martin Prøven; Leren, Trond Paul (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Background Molecular genetic testing of patients with hypobetalipoproteinemia may identify a genetic cause that can form the basis for starting proper therapy. Identifying a genetic cause may also provide novel data on ...
  • Mitochondria hormesis delays aging and associated diseases in Caenorhabditis elegans impacting on key ferroptosis players 
    Schiavi, Alfonso; Salveridou, Eva; Brinkmann, Vanessa; Shaik, Anjumara; Menzel, Ralph; Kalyanasundaram, Sumana; Nygård, Ståle; Nilsen, Hilde; Ventura, Natascia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Excessive iron accumulation or deficiency leads to a variety of pathologies in humans and developmental arrest in the nematode Caenorhabditis elegans. Instead, sub-lethal iron depletion extends C. elegans lifespan. Hypoxia ...
  • Mixed proton and electron conducting double perovskite anodes for stable and efficient tubular proton ceramic electrolysers 
    Vøllestad, Einar; Strandbakke, Ragnar; Tarach, Mateusz; Catalán-Martinez, David; Fontaine, Marie-Laure; Beeaff, Dustin; Clark, Daniel Ryan; Serra, José M.; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Hydrogen production from water electrolysis is a key enabling energy storage technology for the large-scale deployment of intermittent renewable energy sources. Proton ceramic electrolysers (PCEs) can produce dry pressurized ...