Browsing Fakultet for naturvitenskap (NV) by Title

Now showing items 9515-9534 of 12827

    • Reaction mechanism and kinetics for Pt/CNTs catalyzed base-free oxidation of glycerol 

      Ma, Yuanyuan; Gan, Jie; Pan, Minjian; Zhang, Yanfang; Fu, Wenzhao; Duan, Xuezhi; Chen, Wenyao; Chen, De; Qian, Gang; Zhou, Xinggui (Journal article; Peer reviewed, 2019)
      Fundamental understanding of heterogeneously catalyzed aerobic, base-free oxidation of glycerol is highly desirable for sustainable and highly efficient chemical synthesis. In this work, Pt/CNTs catalyzed base-free oxidation ...

    • Reaction mechanism of CO activation and methane formation on Co Fischer-Tropsch catalyst: A combined DFT, transient, and steady-state kinetic modeling 

      Yang, Jia; Qi, Yanying; Zhu, Jun; Zhu, Yi-An; Chen, De; Holmen, Anders (Journal article; Peer reviewed, 2013)
      A new approach for elucidating reaction mechanism of complex reactions, such as Fischer–Tropsch (F–T) synthesis, is presented. It includes a combination of integrated transient and steady-state kinetic modeling, experimental ...

    • Reaction pathway of the hydrothermal synthesis of AgCuO2 from in situ time-resolved X-ray diffraction 

      Liu, hongjun; Grendal, Ola Gjønnes; Skjærvø, Susanne Linn; Dalod, Antoine Robert Marie; van Beek, Wouter; sekkat, abderrahime; Einarsrud, Mari-Ann; munoz-Rojas, David (Journal article; Peer reviewed, 2020)
      AgCuO2 is an interesting semiconductor oxide with appealing optical and electronic properties. While the oxide has been synthesized in bulk by different approaches, no study on the formation mechanism has been carried out ...

    • Reaction Rate Analysis of Manganese Ore Prereduction in CO-CO2 Atmosphere 

      Larssen, Trine Asklund; Senk, Dieter Georg; Tangstad, Merete (Peer reviewed; Journal article, 2021)
      Variations in energy efficiency and climate gas emissions in production of manganese ferroalloys are largely related to the solid-state reduction of the manganese ores used as raw material in the production. The gas-solid ...

    • Reactive Absorption of CO2 in Single and Blended Amine Systems 

      Majeed, Hammad (Master thesis, 2013)
      Global warming scenario is pretty grim and is a well-known worldwide concern, most likely caused by increasing concentrations of CO2 and other greenhouse gases in the earth?s atmosphere due to human activities. CO2 absorption ...

    • Reactive Distillation of Biodiesel: Modelling and Optimal Operation 

      Houge, Emilie Øritsland (Master thesis, 2013)
      This thesis modifies an already existing dynamic Matlab Simulink model to correlate with a Hysys model from a similar research. The models are concerned with the reactive distillation for production of biodiesel from ...

    • Reactive Distillation of Biodiesel: Modelling and Optimal Operation 

      Houge, Emilie Oritsland (Master thesis, 2013)
      This thesis modifies an already existing dynamic Matlab Simulink model to correlate with a Hysys model from a similar research. The models are concerned with the reactive distillation for production of biodiesel from ...

    • Reactivity and Synergism of Vanadium in Microporous Supports with Copperas a Co-cation 

      Bøyesen, Katrine Lie (Doktoravhandlinger ved NTNU, 1503-8181; 2014:213, Doctoral thesis, 2014)
      This study investigates three-dimensional (3-D) microporous materials as carrier systems for vanadium species for the oxidation of propene, also examining the effect of copper as a co-cation.Various 3-D systems have been ...

    • Reactivity assessment of charcoal for use in silicon production 

      Ramos, D.C.; Carneiro, A.C.O.; Tangstad, Merete; Pereira, B.L.C.; Saadieh, Raghed; Oliveira, A.C.; Vital, B.R. (Peer reviewed; Journal article, 2021)
      As charcoal is used in the silicon metal process, reactivity towards SiO is one of the most important properties that has strong effects on silicon recovery. The purpose of this study was to analyze anatomical properties ...

    • Reactivity of Anode Raw Materials and Anodes for Production of Aluminium 

      Engvoll, Marianne Aanvik (Dr. ingeniøravhandling, 0809-103X; 2001:117, Doctoral thesis, 2002)
      In the Hall-Héroult process for primary production of aluminium, a considerable amount of anode carbon is lost through unwanted gasification in air and CO2. The carbon gasification reactions are catalyzed by a number of ...

    • Reactivity of Calcined Clays 

      Danner, Tobias (Doktoravhandlinger ved NTNU, 1503-8181; 2013:218, Doctoral thesis, 2013)
      With 3-5 billion tons cement-produced every year, the cement industry is today the third largest emitter of CO2 in the world after fossil-fuel based energy plants serving heating/cooling of buildings and combustion engines ...

    • Reactivity of Coke in Relation to Sulfur Level and Microstructure 

      Jahrsengene, Gøril; Rørvik, Stein; Ratvik, Arne Petter; Lossius, Lorentz Petter; Haverkamp, Richard G.; Svensson, Ann Mari (Journal article; Peer reviewed, 2019)
      The quality of coke materials available for anodes for the aluminium industry is changing and industrial cokes with higher impurity levels are now introduced. The cokes in the anodes must meet specifications with respect ...

    • Reactivity of silicomanganese slag towards carbon materials - A comparison of coke and charcoal as reducing agents 

      Haugli, Ine Mariell Fagerbakk (Master thesis, 2019)
      Silikomangan produseres ved karbotermisk reduksjon med koks som reduksjonsmiddel. Mens koks er laget av kull og er en fossil karbonkilde, er trekull laget av trær og er en fornybar karbonkilde som ikke slipper ut ekstra ...

    • Reading tea leaves worldwide: Decoupled drivers of initial litter decomposition mass-loss rate and stabilization 

      Sarneel, Judith M.; Hefting, Mariet M.; Sandén, Taru; van den Hoogen, Johan; Routh, Devin; Adhikari, Bhupendra S.; Alatalo, Juha M.; Aleksanyan, Alla; Althuizen, Inge; Alsafran, Mohammed H S A; Atkins, Jeff W.; Augusto, Laurent; Aurela, Mika; Azarov, Aleksej V.; Barrio, Isabel C.; Beier, Claus; Bejarano, María D; Benham, Sue E.; Berg, Björn; Bezler, Nadezhda V.; Björnsdóttir, Katrín; Bolinder, Martin A.; Carbognani, Michele; Cazzolla Gatti, Roberto; Chelli, Stefano; Chistotin, Maxim V.; Christiansen, Casper Tai; Courtois, Pascal; Crowther, Thomas W.; Dechoum, Michele S.; Djukic, Ika; Duddigan, Sarah; Egerton-Warburton, Louise M.; Fanin, Nicolas; Fantappiè, Maria; Fares, Silvano; Fernandes, Geraldo W.; Filippova, Nina V.; Fliessbach, Andreas; Fuentes, David; Godoy, Roberto; Grünwald, Thomas; Guzmán, Gema; Hawes, Joseph; He, Yue; Hero, Jean-Marc; Hess, Laura L.; Hogendoorn, Katja; Høye, Toke T.; Jans, Wilma W P; Jónsdóttir, Ingibjörg S; Keller, Sabina; Kepfer-Rojas, Sebastian; Kuz'menko, Natalya N.; Larsen, Klaus S.; Laudon, Hjalmar; Lembrechts, Jonas J.; Li, Junhui; Limousin, Jean-Marc; Lukin, Sergey M.; Marques, Renato; Marín, César; McDaniel, Marshall D.; Meek, Qi; Merzlaya, Genrietta E.; Michelsen, Anders; Montagnani, Leonardo; Mueller, Peter; Murugan, Rajasekaran; Myers-Smith, Isla H.; Nolte, Stefanie; Ochoa-Hueso, Raúl; Okafor, Bernard N.; Okorkov, Vladimir V.; Onipchenko, Vladimir G.; Orozco, María C; Parkhurst, Tina; Peres, Carlos A.; Petit Bon, Matteo; Petraglia, Alessandro; Pingel, Martin; Rebmann, Corinna; Scheffers, Brett R.; Schmidt, Inger; Scholes, Mary C.; Sheffer, Efrat; Shevtsova, Lyudmila K.; Smith, Stuart; Sofo, Adriano; Stevenson, Pablo R.; Strouhalová, Barbora; Sundsdal, Anders; Sühs, Rafael B.; Tamene, Gebretsadik; Thomas, Haydn J D; Tolunay, Duygu; Tomaselli, Marcello; Tresch, Simon; Tucker, Dominique L.; Ulyshen, Michael D.; Valdecantos, Alejandro; Vandvik, Vigdis; Vanguelova, Elena I.; Verheyen, Kris; Wang, Xuhui; Yahdjian, Laura; Yumashev, Xaris S.; Keuskamp, Joost A. (Peer reviewed; Journal article, 2024)
      The breakdown of plant material fuels soil functioning and biodiversity. Currently, process understanding of global decomposition patterns and the drivers of such patterns are hampered by the lack of coherent large-scale ...

    • Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions 

      Chavez Panduro, Elvia Anabela; Cordonnier, Benoit; Gawel, Kamila; Børve, Ingrid; Iyer, Jaisree; Carroll, Susan; Michels, Leander; Rogowska, Melania; McBeck, Jessica Ann; Sørensen, Henning; Walsh, Stuart; Renard, Francois; Gibaud, Alain; Torsæter, Malin; Breiby, Dag Werner (Peer reviewed; Journal article, 2020)
      Depleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, ...

    • Real Time Optimization and Nonlinear Model Predictive Control of a Gas Lifted Oil Network 

      Yahia, Sarry Haj (Master thesis, 2018)
      As oil reserves become scarcer, oil production and recovery must be enhanced. The gas lift is one of the techniques used to enhance oil production and recovery. It is usually used in reservoirs that suffer from insufficient ...

    • Real-time classification of mediastinal lymph nodes in endobronchial ultrasound images using deep neural networks 

      Rødde, Mia (Master thesis, 2024)
      Bakgrunn og formål Korrekt klassifisering av lymfeknute stasjoner i mediastinum er nødvendig for å bestemme riktig lungekreft stadium. Dette er informasjon som brukes til å gi pasienten den mest effektive behandlingen. Det ...

    • Real-time coupled-cluster approaches for electronic multiphoton processes in atoms and molecules 

      Skeidsvoll, Andreas Sæther (Doctoral theses at NTNU;2023:227, Doctoral thesis, 2023)
      This thesis explores time-dependent coupled cluster (TDCC) and time-dependent equation-of-motion coupled cluster (TD-EOM-CC) methods in quantum chemistry. As part of the thesis work, these methods were integrated into the ...

    • Real-time in situ Mueller matrix ellipsometry of GaSb nanopillars: observation of anisotropic local alignment 

      Nerbø, Ingar Stian; Le Roy, Sebastien; Foldyna, Martin; Søndergård, Elin; Kildemo, Morten (Journal article; Peer reviewed, 2011)
      The formation of GaSb nanopillars by low energy ion sputtering is studied in real-time by spectroscopic Mueller matrix ellipsometry, from the initial formation in the smooth substrate until nanopillars with a height of 200 ...

    • Real-time intravital multiphoton microscopy to visualize focused ultrasound and microbubble treatments to increase blood-brain barrier permeability 

      Poon, Charissa; Mühlenpfordt, Melina; Olsman, Marieke; Kotopoulis, Spiros; Davies, Catharina de Lange; Hynynen, Kullervo (Peer reviewed; Journal article, 2022)
      The blood-brain barrier (BBB) is a key challenge for the successful delivery of drugs to the brain. Ultrasound exposure in the presence of microbubbles has emerged as an effective method to transiently and locally increase ...