Fakultet for naturvitenskap (uspesifisert): Recent submissions
Now showing items 1-20 of 76
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Evidence of avian influenza virus inseabirds breeding on a Norwegian high-Arctic archipelago
(Peer reviewed; Journal article, 2020)Wild aquatic birds serve as the natural reservoir for avian influenza virus (AIV), a disease with significant implications for avian and mammalian health. Climate change is predicted to impact the dynamics of AIV, particularly ... -
Quantitative and qualitative consequences of reduced pollen loads in a mixed-mating plant
(Journal article; Peer reviewed, 2019)Greater pollination intensity can enhance maternal plant fitness by increasing seed set and seed quality as a result of more intense pollen competition or enhanced genetic sampling. We tested experimentally these effects ... -
Quantitative and qualitative consequences of reduced pollen loads in a mixed-mating plant
(Journal article; Peer reviewed, 2019)Greater pollination intensity can enhance maternal plant fitness by increasing seed set and seed quality as a result of more intense pollen competition or enhanced genetic sampling. We tested experimentally these effects ... -
Collection of aluminium packaging today
(Research report, 2019)This report investigates the collection of aluminium packaging, particularly in China, the United States and the European Union. A literature search among journal articles using Google Scholar, company and organization ... -
Numerical analysis of boundary conditions in a Lagrangian particle model for vertical mixing, transport and surfacing of buoyant particles in the water column
(Journal article; Peer reviewed, 2019)Lagrangian particle models are used for many applications in the ocean sciences, including transport modelling of oil spills, fish eggs and larvae, plastics, and sediment particles. In the context of oil spill modelling, ... -
Little Ice Age summer temperatures in Western Norway from a 700-year tree-ring chronology
(Journal article; Peer reviewed, 2018)A ring-width Pinus sylvestris chronology from Sogndal in western Norway was created, covering the period AD 1240–2008 and allowing for reconstruction of monthly mean July temperatures. This reconstruction is the first of ... -
Mechanical, thermal and swelling properties of cellulose nanocrystals/PVA nanocomposites membranes
(Journal article; Peer reviewed, 2018)Cellulose nanocrystals (CNC) have strong reinforcing properties when incorporated in a compatible polymer matrix. The study was conducted to investigate the effect of addition of different proportions of CNC on the mechanical, ... -
Effect of Processing Parameters on the Relative Density of AlSi10Mg Processed by Laser Powder Bed Fusion
(Journal article, 2019)In order for a material processed by laser powder bed fusion (LPBF) to achieve the desired mechanical properties, the relative density of the material should be as high as possible. In this study, the effect of various ... -
Biaxial strength and slow crack growth in porous alumina with silica sintering aid
(Journal article, 2018)Biaxial strength, fracture toughness and subcritical crack growth are reported for coarse grained porous alumina ceramics. The materials were prepared with a varying amount of a silica sintering aid, which resulted in the ... -
Life-stage associated remodeling of lipid metabolism regulation in Atlantic salmon
(Journal article; Peer reviewed, 2018)Atlantic salmon migrates from rivers to sea to feed, grow and develop gonads before returning to spawn in freshwater. The transition to marine habitats is associated with dramatic changes in the environment, including water ... -
Bottom RedOx Model (BROM v.1.1): a coupled benthic–pelagic model for simulation of water and sediment biogeochemistry
(Journal article; Peer reviewed, 2017)Interactions between seawater and benthic systems play an important role in global biogeochemical cycling. Benthic fluxes of some chemical elements (e.g., C, N, P, O, Si, Fe, Mn, S) alter the redox state and marine carbonate ... -
Fiskebiologiske undersøkelser i Auravassdraget. Årsrapport 2005
(NINA rapport;115, Research report, 2006)Formålet med denne undersøkelsen er å overvåke utviklingen av bestandene av laks og sjøør-ret i Auravassdraget. Resultatene skal danne grunnlag for å evaluere de tiltakene som er gjen-nomført som kompensasjon for negative ... -
Homoacetogenic H2 Consumption In Fermentative Hydrogen Production Processes
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:182, Doctoral thesis, 2010)Hydrogen gas generation has been studied by environmental biotechnologists since the 1930’s as a key intermediate in biogas process, and since the 70’s also because of its potential as a future energy carrier. Exhaustive ... -
Minimum Energy Requirements in Complex Distillation Arrangements
(Dr. ingeniøravhandling, 0809-103X; 2001:43, Doctoral thesis, 2001)Distillation is the most widely used industrial separation technology and distillation units are responsible for a significant part of the total heat consumption in the world’s process industry. In this work we focus on ... -
Rheology and Reactivity of Cementitious Binders with Plasticizers
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:189, Doctoral thesis, 2005)The rheological behaviour of cementitious pastes has been studied by various means. Six different cements have been studied in main parts of the work and all of them have been characterized according to the Rietveld method ... -
Degradation of polymeric and particulate organic carbon in biofilms
(Dr. ingeniøravhandling, 0809-103X; 2003:101, Doctoral thesis, 2003)Polymeric and particulate organic carbon (POM) are fundamental compounds in the global cycling of carbon, and constitute significant amounts of BOD in municipal wastewater. The main objective of this work is to study ... -
Steam explosions during granulation of Si-rich alloys.: Effect of Al- and Ca-additions
(Dr.ingeniøravhandling, 0809-103X; 2002:43, Doctoral thesis, 2002)Steam explosions are possible during granulation of Si and FeSi75. These explosions are a great hazard, and must be avoided. Norwegian ferroalloy producers have initiated a research program to learn more about such violent ... -
Development and modification of glass membranes for aggreessive gas separations
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:24, Doctoral thesis, 2005)Chlorine as a chemical is widespread in industry and found in a great variety of processes ranging from water purification to plastic production. In this thesis, a magnesium production factory was chosen as an example ... -
Flow and Heat Transfer in a Radially Spreading Liquid Metal Jet Related to Casting of Ferroalloys
(Dr. ingeniøravhandling, 0809-103X; 2000:83, Doctoral thesis, 2000)In the past more and more advanced and fine-tuned processes for steel production have resulted in increased demands for new and more costeffective ferroalloys used as constituents in the processes. Casting techniques and ... -
Work Hardening and Mechanical Anisotropy of Aluminium Sheets and Profiles
(Dr. ingeniøravhandling, 0809-103X; 2003:105, Doctoral thesis, 2003)The processing of aluminium alloys from casting to end product is associated with a large number of metallurgical phenomena. In order to further improve and optimise process routes and alloys, a thorough understanding of ...