Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 460-479 of 838

  • Manipulating Single-Photon Emission from Point Defects in Diamond and Silicon Carbide 
    Bathen, Marianne Etzelmüller; Vines, Lasse (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Point defects in semiconductors are emerging as an important contender platform for quantum technology (QT) applications, showing potential for quantum computing, communication, and sensing. Indeed, point defects have been ...
  • MAPO-18 Catalysts for the Methanol to Olefins Process: Influence of Catalyst Acidity in a High-Pressure Syngas (CO and H2) Environment 
    Xie, Jingxiu; Firth, Daniel Sean; Cordero Lanzac, Tomas; Airi, Alessia; Negri, Chiara; Øien-Ødegaard, Sigurd; Lillerud, Karl Petter; Bordiga, Silvia; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The transition from integrated petrochemical complexes toward decentralized chemical plants utilizing distributed feedstocks calls for simpler downstream unit operations. Less separation steps are attractive for future ...
  • Mapping the coke formation within a zeolite catalyst extrudate in space and time by operando computed X-ray diffraction tomography 
    Wragg, David Stephen; Kalantzopoulos, Georgios; Pappas, Dimitrios; Pinilla-Herrero, Irene; Rojo-Gama, Daniel; Redekop, Evgeniy; Di Michiel, Marco; Beato, Pablo; Lundegaard, Lars Fahl; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    We have used operando X-ray diffraction computed tomography (XRD-CT) analysed by rigorous crystallographic methods to reveal the behaviour of a zeolite/alumina based catalyst extrudate in the methanol-to-hydrocarbon reaction ...
  • Mapping the maturity of organic-rich shale with combined geochemical and geophysical data, Draupne Formation, Norwegian Continental Shelf 
    Johnson, James Ronald; Hansen, Jørgen André; Rahman, Md Jamilur; Renard, Francois; Mondol, Nazmul Haque (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The evaluation of the interplay between kerogen maturation and total organic carbon (TOC) content within an organic-rich shale is critical to characterizing source rock shale's elastic behavior. We analysed a comprehensive ...
  • Meal Regularity Plays a Role in Shaping the Saliva Microbiota 
    Viljakainen, Jannina; Raju, Sajan C.; Viljakainen, Heli; Figueiredo, Rejane Augusta de Oliveira; Roos, Eva; Weiderpass, Elisabete; Rounge, Trine Ballestad (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Background: Diet may influence health directly or indirectly via the human microbiota, emphasizing the need to unravel these complex relationships for future health benefits. Associations between eating habits and gut ...
  • Mechanical properties of particle-covered droplets probed by nonuniform electric field 
    Khobaib, Khobaib; Rozynek, Zbigniew Jerzy; Hornowski‬‬‬‬‬, Tomasz (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Particle-covered droplets are used in several fundamental studies and practical applications. For many applications, it is important to understand the mechanics of these droplets subjected to induced external stresses, ...
  • Mechanism of Alkyne Hydroarylation Catalyzed by (P,C)-Cyclometalated Au(III) Complexes 
    Holmsen, Marte Sofie Martinsen; Blons, Charlie; Amgoune, Abderrahmane; Regnacq, Matthieu; Lesage, Denis; Sosa Carrizo, E. Daiann; Lavedan, Pierre; Gimbert, Yves; Miqueu, Karinne; Bourissou, Didier (Journal article / Tidsskriftartikkel / SubmittedVersion, 2022)
    Over the last 5–10 years, gold(III) catalysis has developed rapidly. It often shows complementary if not unique features compared to gold(I) catalysis. While recent work has enabled major synthetic progress in terms of ...
  • Mechanism of grain reconstruction of Pd and Pd/Ni wires during Pt–catchment 
    Fjellvåg, Asbjørn Slagtern; Jørgensen, Peter Stanley; Waller, David; Wragg, David Stephen; Michiel, Marco Di; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    We have investigated industrial Pd and Pd/Ni (91.3/8.7 at.%) wires and gauzes used for Pt-catchment during the ammonia oxidation process, focusing on the origin of the grain reconstruction phenomena. In situ X-ray absorption ...
  • Mechanism of the formation of engineered magnesite: A critical mineral to mitigate CO2 industrial emissions 
    Montes-Hernandez, German; Bah, Mahamadou Diouma; Renard, Francois (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Magnesium carbonate production at the industrial scale is a realistic option to reduce the industrial emissions of CO2. Ultrabasic rocks and/or alkaline mine waste provide magnesium sources and are widely available in the ...
  • Mechanisms for sonochemical oxidation of nitrogen 
    Qureishy, Thomas; Løyland, Sverre; Jørgensen, Susanne Jøntvedt; Færgestad, Eline Mosleth; Norby, Truls; Uggerud, Einar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    N2O, and mixtures of N2 and O2, dissolved in water—both in the presence and absence of added noble gases—have been subjected to ultrasonication with quantification of nitrite and nitrate products. Significant increase in ...
  • 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 ...