Blar i Faculty of Mathematics and Natural Sciences på tittel
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An isenthalpic formulation for simulating geothermal systems with phase changes
(Chapter; Peer reviewed, 2023)We propose a unified isenthalpic formulation for the equilibrium problem of compositional multiphase mixtures. To solve the equilibrium problem numerically, we used an interior point method with line search and present an ... -
Isocitrate dehydrogenase from extremophiles; Molecular adaptations to high temperatures
(Doctoral thesis, 2006-11-30)Life on earth has adapted to a wide variety of environmental conditions, many of which are extreme to us humans. Temperature is one of the most important factors limiting biological activity and survival, but so far, ... -
Isolation and Characterisation of Shiga Toxin-Producing Escherichia Coli from Norwegian Bivalves
(Master thesis, 2017-06-23)Only few studies concerning Shiga toxin-producing E. coli (STEC) detection in coastal environments and bivalves have been reported and there have been no reported outbreaks by STEC from bivalves in the world. The aim of ... -
Isolation and characterization of a new keratinolytic Fervidobacterium pennivorans strain from a hot spring in Tajikistan
(Master thesis, 2018-06-30)Thermophiles are organisms found among the Archaea and Eubacteria domains which are adapted to live at high temperature, the optimal growth temperature being between 50 °C and 79 °C. Phylum Thermotogae includes anaerobic ... -
Isolation and Characterization of Larvicidal Phenolic Acids from Kotschya thymodora Leaves
(Journal article; Peer reviewed, 2020)Malaria is a vector borne disease responsible for high morbidity, mortality and poverty in many tropical and subtropical countries. The disease is transmitted through a bite from an infected female Anopheles mosquito, ... -
Isolation and Characterization of Novel Planctomycetes from Svarthammarhola Ice Cave with Potential for Production of Bioactive Molecules
(Master thesis, 2018-08-31)Planctomycetes represent a phylum of bacteria that possess peculiar characteristics. These include reproduction by budding, crateriform structures, rosette formation and an intricate cellular plan. They are considered ... -
Isolation and complete genome sequence of the thermophilic Geobacillus sp. 12AMOR1 from an Arctic deep-sea hydrothermal vent site
(Peer reviewed; Journal article, 2016-02-24)Members of the genus Geobacillus have been isolated from a wide variety of habitats worldwide and are the subject for targeted enzyme utilization in various industrial applications. Here we report the isolation and complete ... -
Isolation and Identification of Flavonoids Found in Zostera marina Collected in Norwegian Coastal Waters
(Peer reviewed; Journal article, 2016-05-26)In extracts of the seagrass Zostera marina, collected in coastal waters of West-Norway, fourteen different flavones and high amounts of rosmarinic acid were identified. Five of the flavones were found to be sulphated, among ... -
Isolation of lipid classes from nutritional marine oils: improved extraction strategy and discrimination studies based on the positional distribution of omega-3 polyunsaturated fatty acids on triacylglycerol structures using liquid chromatography tandem mass spectrometry and principal component analysis
(Master thesis, 2014-03-20)The consumer of the 21st century have developed an awareness of the quality of food products in their diet and the impact of these products on their health which in turn has led to an escalating consumer demand for omega-3 ... -
Isolation, identification and properties of pyranoanthocyanins and anthocyanin forms
(Doctoral thesis, 2007-06-22)This dissertation focuses on isolation and structural elucidation of anthocyanins, and their chemical properties. The characterization of anthocyanins from castor (Ricinus communis), fourteen cultivars of European gooseberry ... -
Isomers of the perfluoroalkylacids PFOS and PFOA and their precursors in an environmental hotspot impacted by AFFFs
(Master thesis, 2023-12-20) -
Isotopic composition of Pb in tree rings of Norway spruce (Picea abies) from the Fensfjorden area, western Norway
(Master thesis, 2012-06-01)The annual growth of tree rings makes the trees as possible archive of the past atmospheric pollution. However, several aspects addressed in literature such as post-depositional mobility of Pb, intra-ring heterogeneity and ... -
IsoTrotter: Visually Guided Empirical Modelling of Atmospheric Convection
(Journal article; Peer reviewed, 2020)Empirical models, fitted to data from observations, are often used in natural sciences to describe physical behaviour and support discoveries. However, with more complex models, the regression of parameters quickly becomes ... -
Iterative Coupling for Fully Dynamic Poroelasticity
(Journal article; Peer reviewed, 2021)We present an iterative coupling scheme for the numerical approximation of the mixed hyperbolic-parabolic system of fully dynamic poroelasticity. We prove its convergence in the Banach space setting for an abstract ... -
Iterative Linearisation Schemes for Doubly Degenerate Parabolic Equations
(Peer reviewed; Journal article, 2019)Mathematical models for flow and reactive transport in porous media often involve non-linear, degenerate parabolic equations. Their solutions have low regularity, and therefore lower order schemes are used for the numerical ... -
Iterative methods for solving the Multiple Network Poroelastic Theory (MPET) model
(Master thesis, 2022-01-17) -
Iterative schemes for solving coupled, non-linear flow and transport in porous media
(Master thesis, 2016-12-24)In this thesis we compare different iterative approaches for solving the non-linear, coupled multiphase flow and reactive transport in porous media. Especially, we consider two-phase flow and one a-half phase flow (modeled ... -
Iterative schemes for surfactant transport in porous media
(Journal article; Peer reviewed, 2021)In this work, we consider the transport of a surfactant in variably saturated porous media. The water flow is modelled by the Richards equations and it is fully coupled with the transport equation for the surfactant. Three ... -
Iterative solvers for Biot model under small and large deformation
(Journal article; Peer reviewed, 2021)We consider L-scheme and Newton-based solvers for Biot model under large deformation. The mechanical deformation follows the Saint Venant-Kirchoff constitutive law. Furthermore, the fluid compressibility is assumed to be ... -
Iterative solvers for poromechanics : Iterative solvers for poromechanics
(Doctoral thesis, 2019-11-22)This thesis concerns iterative solvers for poromechanics problems. The problems in the studies have involved linear poromechanics, non-linear poromechanics, and poromechanics under large deformation. We included high order ...