Browsing Fakultet for naturvitenskap (NV) by Title
Now showing items 8310-8329 of 12512
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Overpumping av makrell Effekt på fangstkvalitet
(Research report, 2013)Prosjektets hovedmål er å klarlegge hvorvidt det kan registreres forskjeller i makrellens kvalitet når den er pumpet direkte om bord i fangstfartøyet og når den er pumpet til et annet fartøy (overpumping). Resultatene viser ... -
An Overview of Currently Applied Ferrochrome Production Processes and Their Waste Management Practices
(Peer reviewed; Journal article, 2023)Ferrochrome (FeCr) is the main source of virgin chromium (Cr) units used in modern-day chromium (Cr) containing alloys. The vast majority of produced Cr is used during the production of stainless steel, which owes its ... -
Overview of the Possibilities and Limitations of the Characterization of Ceramic Foam Filters for Metal Melt Filtration
(Journal article; Peer reviewed, 2021)The filtration of molten metal using ceramic foam filters (CFF) is a purification method often used by the aluminum industry to meet the increasing demands the melt quality. CFFs are in most cases produced by the replica ... -
Overview of tRNA Modifications in Chloroplasts
(Peer reviewed; Journal article, 2022)The chloroplast is a promising platform for biotechnological innovation due to its compact translation machinery. Nucleotide modifications within a minimal set of tRNAs modulate codon–anticodon interactions that are crucial ... -
Oxidation and fume formation during production of Si and Mn-based alloys
(Doctoral theses at NTNU;2018:313, Doctoral thesis, 2018)Thermally generated fumes from the production process of manganese ferroalloys are generated due to the reaction between high temperature liquid- or metal vapor and ambient oxygen in the air, and are mostly composed of ... -
Oxidation and Fume Formation from Liquid Silicomanganese Alloys Exposed to Atmospheres Containing Moisture
(Peer reviewed; Journal article, 2022)In industrial applications and laboratory studies, it has been shown that the use of water spray may significantly reduce the amount of fume generated from the oxidation process of liquid high carbon ferromanganese alloy. ... -
Oxidation driven decomposition of CeNbO4 in pure oxygen
(Journal article; Peer reviewed, 2008)CeNbO4 possess oxygen hyper-stoichiometry at ambient and moderate temperature. At elevated temperature CeNbO4+δ is thermally reduced to near stoichiometric CeNbO4 accompanied by a structural phase transition. Above the ... -
Oxidation Kinetics of Nanocrystalline Hexagonal RMn<inf>1-x</inf>Ti<inf>x</inf>O<inf>3</inf> (R = Ho, Dy)
(Journal article; Peer reviewed, 2023) -
Oxidation of Al-Mg alloys in small scale experiments
(Research report, 2019)While a significant amount of work has been done on the oxidation of Al-Mg alloys a limited portion of the work has been done under a true furnace atmosphere created by an air-fuel or oxyfuel burner. A series of oxidation ... -
Oxidation of Fish Oil - The Influence of Aroma Compounds on Determination of PV and AV
(Master thesis, 2016)The consumption of fish oil as a nutraceutical has increased extensively in the recent years, due to their high content of health beneficial omega-3 fatty acids. The omega-3 fatty acids in fish oil are highly unsaturated ... -
Oxidation of Fish Oil and Powder - Exploring Suitable Methods for the Determination of Oxidative Changes in Fish Oil and Powder
(Master thesis, 2022)Lipidoksidasjon (harskning) er en av hovedårsakene til kvalitetsforringelse i mat, noe som begrenser muligheten for anrikning av marine n-3 fettsyrer i matvarer. De gunstige helseeffektene av langkjeda n-3 flerumettede ... -
Oxidation of Liquid Silicon in a Medium Scale Induction Furnace: Examination of the Fuming Rate and Fume Composition
(Master thesis, 2012)The aim of this work was to study the effect of flow rate on the fuming rate/silica flux of liquid silicon in order to gain a better understanding of the silica fuming during industrial ladle refining during silicon ... -
Oxidation of Liquid Silicon in Air Atmospheres Containing Water Vapor
(Peer reviewed; Journal article, 2019)The oxidation of silicon (Si) has been extensively investigated over the past 50 years. Yet, an understanding of the mechanism and rate of liquid Si oxidation in atmospheres containing water vapor, is lacking. The effect ... -
Oxidation of Manganese-Containing Aluminium Alloys: Oxidation of Molten Mn-Containing Al Alloys in Various Atmospheres
(Master thesis, 2013)An oxidation study was performed on 99.99% Al, Al1%Mn and Al5%Mn materials, both ina thermogravimetric furnace, and in a muffle furnace. The mass gain behaviour for thesematerials was studied and compared for dierent ... -
Oxidation of marine lipids in liposomes and emulsions mediated by iron and methemoglobin
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:169, Doctoral thesis, 2014)Long chain omega-3 polyunsaturated fatty acids (LC omega-3 PUFA) are vital for physiological functions and have therapeutic and health benefits. The consumption of LC PUFA in the Western world has been below recommended ... -
Oxidation of marine phospholipids in liposomes
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:143, Doctoral thesis, 2007)Marine phospholipids contain a high amount of n-3 polyunsaturated fatty acids (PUFAs), which have documented beneficial effect on human health. Due to this, marine phospholipids have a high potential for use in products ... -
Oxidation of Methanol to Formaldehyde (MTF) over Silver Catalyst
(Master thesis, 2020)Arbeidet som er utført i denne master oppgaven hadde som mål å bidra til forståelsen av metanol til formaldehyd reaksjonen, og sølv interaksjonene i disse forholdene. Sølvpartikler, nett og annulær ble behandlet i ulike ... -
Oxidation of Methanol to Formaldehyde over Ag - Kinetic Modelling of Gas Phase Reactions using COMSOL Multiphysics
(Master thesis, 2017)In this master thesis the goal was to create two COMSOL Multiphysics simulation models, one representing the laboratory scaled reactor and the other representing the industrial scale reactor, to study gas phase reactions ... -
Oxidation of methanol to formaldehyde over Ag catalyst - A study of reaction pathways and Ag catalyst restructuring during MTF
(Master thesis, 2018)Formaldehyde is recognised as an important industrial chemical, being a versatile organic molecule. Due to high reactivity, it is used as a building block to synthesise other chemicals and industrial products. Production ... -
Oxidation of silicon in aqueous media
(Master thesis, 2011)Silicon is used in the production of various ceramic products. As the solar industry is advancing, the need for reusable crucibles for the casting of solar grade silicon has arisen. One idea is to produce silicon nitride ...