Browsing Department of Mathematics and Natural Sciences by Title
Now showing items 163-182 of 312
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Mimicking orchids lure bees from afar with exaggerated ultraviolet signals
(Peer reviewed; Journal article, 2023-01)Flowers have many traits to appeal to pollinators, including ultraviolet (UV) absorbing markings, which are well-known for attracting bees at close proximity (e.g., <1 m). While striking UV signals have been thought to ... -
Model based optimization of biogas production at SNJ plant
(Masteroppgave/UIS-TN-IMN/2010;, Master thesis, 2010)The main purpose of this thesis is the acquisition of knowledge and familiarization with the SNJ biogas plant and effects of codigestion. Plant operation and performance was monitored in order to understand and evaluate ... -
A modelling study of environmental fate and effects of oil leakage from abandoned wells
(Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2019-06-15)Potential environmental consequences of oil leakages are taken into consideration in the ongoing development of plug and abandonment (P&A) activities on the Norwegian Continental Shelf (NCS). The P&A on the NCS has been ... -
Molecular characterization of circulating tumor cells from pancreatic cancer patients by single-cell quantitative reverse transcription PCR
(Masteroppgave/UIS-TN-IMN/2014;, Master thesis, 2014-06-16)Pancreatic cancer is a highly lethal disease, which kills approximately 70 000 people per year in Europe alone. The median survival after the time of diagnosis is five to six months for patients with advanced cancer, making ... -
Molecular characterization of extended-spectrum beta lactamase producing Klebsiella pneumoniae from the Stavanger region between 2003 and 2012
(Masteroppgave/UIS-TN-IMN/2015;, Master thesis, 2015-06-12)Klebsiella pneumoniae is a Gram-negative rod in the Enterobacteriaceae family, known to cause both community- and hospital-acquired infections, especially in immunocompromised patients. In the hospital setting, K. pneumoniae ... -
Molecular detection of tumor cells in regional lymph nodes and blood from patients undergoing surgery for non-small cell lung cancer (NSCLC)
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)The spread of metastases to regional lymph nodes in patients undergoing surgery for non-small cell lung cancer (NSCLC) is routinely detected by histopathological examinations of tissue sections from retrieved regional lymph ... -
Monitoring of sensory quality of milk by spectroscopic techniques
(Masteroppgave/UIS-TN-IMN/2015;, Master thesis, 2015-06)The combined use of spectroscopic analysis and chemometric tools has wide application in evaluating and monitoring the product sensory qualities. The main intention of the work was to better understand the use of a ... -
Monitoring sediment bound cadmium in sømme bay, Hafrsfjord, Norway
(Masteroppgave/UIS-TN-IMN/2010;, Master thesis, 2010)Cadmium is considered to be a very toxic heavy metal for organisms at all levels of organisation. Therefore, careful analysis is made in Sømme bay, Hafrsfjord as this area is a very important marine wetland habitat, ... -
A multiple-source air quality control model achieving a standard, defined by a vector-valued function
(Conference object, 2009-07)Earlier papers by Gustafson, Kortanek, Sweigart and others describe models for controlling air pollution, consisting of chemically inert pollutants like sulphur dioxide. It was assumed that the concentration contributions ... -
Municipal wastewater treatment using salsnes filter and hollow fiber membrane bioreactor (HMFB)
(Masteroppgave/UIS-TN-IMN/2014;, Master thesis, 2014-07-04)This study investigated the performance of Salsnes Filter (SF) as a primary treatment prior to hollow fiber membrane bioreactor (HFMB) for nitrogen removal. The objective was to determine whether influent particle size ... -
Nanostructured titanium dioxide: fate in the aquatic environment and effects on the marine mussel mytilus edulis
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)The rapid development of nanotechnology and the corresponding increase in the use of nanoparticles in commercial products have led to concerns about their health risks and environmental impact. As the aquatic systems act ... -
Natural peptides with antioxidant activity from Atlantic cod and Atlantic salmon residual material
(Journal article; Peer reviewed, 2016-03)Summary. Water-soluble peptides/proteins with molecular weight below 10 kDa were isolated from residual material of cod (liver, skin, and cod mix i.e. skin, frames, and viscera), and salmon (skin, and salmon mix i.e. skin, ... -
Negative feedback loops leading to nitrate homeostasis and oscillatory nitrate assimilation in plants and fungi.
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)Nitrate is an important nutrient for plants and fungi. For plants it has been shown that cytosolic nitrate levels are under homeostatic control. Here we describe two networks that can obtain robust, i.e. perturbation ... -
New Microwave Technology for the Treatment of Drill Cuttings
(Masteroppgave/UIS-TN-IMN/2017;, Master thesis, 2017)The focus of this thesis was to investigate the limitations of the new microwave susceptor technology. The technology offers promising opportunities in the treatment of oil contaminated drill cuttings to meet OSPAR and oil ... -
Note on the invariant classification of vacuum type D spacetimes
(Journal article; Peer reviewed, 2009-12)We illustrate the fact that the class of vacuum type D spacetimes which are I-non-degenerate are invariantly classified by their scalar polynomial curvature invariants. -
On computational linear semi-infinite programming
(Peer reviewed; Journal article, 2008-12) -
On high-order perturbative calculations at finite density
(Journal article; Peer reviewed, 2017-02)We discuss the prospects of performing high-order perturbative calculations in systems characterized by a vanishing temperature but finite density. In particular, we show that the determination of generic Feynman integrals ... -
On the algebraic classification of pseudo-Riemannian spaces
(Journal article; Peer reviewed, 2011-12)We consider arbitrary-dimensional pseudo-Riemannian spaces of signature (k, k + m). We introduce a boost-weight decomposition and define a number of algebraic properties (e.g. the Si- and N-properties) and present a ... -
On the circadian organization of nitrogen and sulphur metabolism in Neurospora crassa
(PhD Thesis UiS;157, Doctoral thesis, 2012-04)The purpose of this thesis was to study the circadian organization of the nitrogen and sulphur metabolism in the filamentous fungi Neurospora crassa. Neurospora is an important model organism used in genetics and circadian ... -
On-shell parameter fixing in the quark-meson model
(Journal article; Peer reviewed, 2017-02)The quark-meson model is often used as an effective low-energy model for QCD to study the chiral transition at finite temperature T and baryon chemical potential μB. The parameters in the quark-meson model can be found by ...