Browsing Fakultet for naturvitenskap (NV) by Title
Now showing items 8230-8249 of 12566
-
Optimisation of an Ammonia Synthesis Loop - Investigation of a Novel Approach for Optimisation of Integrated plants
(Master thesis, 2015)A Hysys model representing the steady state behaviour of a Haber-Bosch ammonia plant was developed based on a dynamic model and plant data from Norwegian fertiliser company Yara International ASA. The plant model was ... -
Optimisation of chemical solution deposition of Indium Tin Oxide thin films
(Journal article; Peer reviewed, 2014-12-31)An environmentally friendly aqueous sol–gel process has been optimised to deposit indium tin oxide (ITO) thin films, aiming to improve the film properties and reduce the deposition costs. It was demonstrated how parameters ... -
Optimisation of Positron-Positronium Conversion and Positronium Laser Excitation
(Master thesis, 2015)The AEgIS collaboration (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) at CERN has as its goal to directly measure the Earth's gravitational force on antimatter for the first time. Neutral antihydrogen atoms ... -
Optimisation of Spray Pyrolysed (La0.6Sr0.4)0.99CoO3 Cathodes for Solid Oxide Fuel Cells
(Master thesis, 2016)The effect of the precursor concentration and the concentration of citric acid (CA) on the properties of (La0.6Sr0.4)0.99CoO3 (LSC), prepared by spray pyrolysis, has been studied. Precursor solutions with concentrations ... -
Optimisation of Zn-Mn co-electrodeposition on aluminium utilising direct- and pulse current in alkaline and acidic electrolyte
(Master thesis, 2019)Aluminium som blir brukt i varmevekslere er utsatt for korrosjon i spesielt aggressive omgivelser. Beskyttelse av aluminiumoverflaten er viktig for å beholde mekaniske og kjemiske kvaliteter i prosessene den blir brukt ... -
Optimisation Study of Jacobsen’s Asymmetric Catalytic Aziridination of Alkenes
(Master thesis, 2019) -
Optimising multi-frame ADF-STEM for high-precision atomic-resolution strain mapping
(Journal article; Peer reviewed, 2017)Annular dark-field scanning transmission electron microscopy is a powerful tool to study crystal defects at the atomic scale but historically single slow-scanned frames have been plagued by low-frequency scanning-distortions ... -
Optimising surface d charge of AuPd nanoalloy catalysts for enhanced catalytic activity
(Journal article; Peer reviewed, 2019)Understanding the catalytic mechanism of bimetallic nanocatalysts remains challenging. Here, we adopt an adsorbate mediated thermal reduction approach to yield monodispersed AuPd catalysts with continuous change of the ... -
Optimising the frequency of clean-up actions in depositional coves in the Lofoten archipelago, Norway to maximize debris removal
(Master thesis, 2018)Marine litter is a global environmental problem which harms a vast amount of species and poses negative economic consequences. Five percent of the marine litter concentrates on the coastlines with an average concentration ... -
Optimising ultrasonic beamforming through solid plates
(Master thesis, 2021)Ultrasoniske verktøy gir en ikke-destruktiv måte å teste integriteten av borehull og sementen som ligger rundt røret. Dagens verktøy tar ikke i bruk dynamisk fokusering, og visse begrensninger på grunn av dette. Å fokusere ... -
Optimization and Further Development of ConCordix Formulation Technology
(Doctoral theses at NTNU;2022:389, Doctoral thesis, 2022)Food supplements are recommended for individuals lacking micronutrients in their diets, e.g., vegetarians, vegans, people with allergies, eating disorders, or bowel diseases, as well as pregnant or breastfeeding women, ... -
Optimization and Modeling of electrode structure and composition for novel PEM water electrolyser MEAs
(Master thesis, 2011)Lack of commercial electrocatalysts and membrane electrode assemblies (MEA) which are efficient, durable and reasonably priced for proton exchange membrane water electrolysis was the inspiration of the current project.A ... -
Optimization and verification of dosimetric robustness of VMAT dose-plans
(Master thesis, 2016)Radiation therapy has for several years played an important role in the curative management of patients with early stage disease and also in the palliation of symptoms associated with advanced or metastatic disease. Organs ... -
Optimization for microencapsulation of marine oil
(Master thesis, 2021)Abstract will be available on 2024-06-30 -
Optimization in CT: Evaluation of dose saving potential in a thorax-abdomen/pelvis protocol using iterative reconstruction techniques
(Master thesis, 2013)The use of computed tomography (CT) has increased dramatically during the last two decades and contributes today to 80% of the estimated population dose caused by radiological examinations. Recent publications have shown ... -
Optimization of a Reactor Network for Production of Butyl Butyrate by an Attainable Region Analysis
(Master thesis, 2017)Butyl butyrate is a promising supplement for jet fuel and diesel. It can be produced in a biotechnological process, by an esterification reaction between butanol and butyric acid. These intermediates can in turn be produced ... -
Optimization of an Absorption-Based Biogas Upgrading and Liquefaction Process
(Journal article; Peer reviewed, 2019)The present work proposes a methodology for optimization of a liquefied biomethane (LBM) production plant. The LBM production plant comprises amine-based absorption upgrading followed by a single expander refrigeration ... -
Optimization of chemical composition of novel manganite oxides for oxygen permeable membranes
(Master thesis, 2015)Every year, millions of tons of high purity oxygen are produced mainly by cryogenic distillation. Since this process is energetically demanding, there is a need for more energy efficient technologies, and the use of oxygen ... -
Optimization of Co-Ni-Mg-Al mixed-oxides CO2 methanation catalysts with solution combustion synthesis: On the importance of Co incorporation and basicity
(Peer reviewed; Journal article, 2023)Hydrogenation of CO2 to methane is a promising prospect for the utilization of carbon dioxide. Ni-Mg-Al mixed oxides have been reported as a catalyst for this process. Their promotion with cobalt allows to improve Ni ... -
Optimization of Deacetylation Process for Regenerated Cellulose Hollow Fiber Membranes
(Journal article; Peer reviewed, 2017)Cellulose acetate (CA) hollow fibers were spun from a CA+ Polyvinylpyrrolidone (PVP)/N-methyl-2-pyrrolidone (NMP)/H2O dope solution and regenerated by deacetylation. The complete deacetylation time of 0.5 h was found at a ...