Browsing Department of Mathematics and Natural Sciences by Title
Now showing items 219-238 of 312
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Pseudo-Riemannian VSI spaces
(Journal article; Peer reviewed, 2011)In this paper we consider pseudo-Riemannian spaces of arbitrary sig- nature for which all of their polynomial curvature invariants vanish (VSI spaces). We discuss an algebraic classification of pseudo-Riemannian spaces ... -
Pseudo-Riemannian VSI spaces II
(Journal article; Peer reviewed, 2012)In this paper we consider pseudo-Riemannian spaces of arbitrary signature for which all of the polynomial curvature invariants vanish (VSI spaces). Using an algebraic classification of pseudo-Riemannian spaces in terms of ... -
Quality of Norwegian cucumbers: effect of greenhouse praxis on taste and taste related constituents, and GC-FID analysis on content of fatty acids and aldehydes
(Master thesis, 2014-07-14)Earlier studies have shown that sugars (SSC), salts (EC) and the relationships between sugars/salts and sugars/acids (TTA- total titratable acids) may impact taste in cucumber. In this study, the impacts of ... -
Quantum correction to inflation and curvature perturbation
(Masteroppgave/UIS-TN-IMN/2015;, Master thesis, 2015-06)Inflation is a sudden and near exponential expansion of space in early universe. Infla- tion solved flatness problem, horizon problem and monopole problem that persisted in standard big bang cosmology. It was not only useful ... -
Rapid detection of microorganisms in the dairy value chain by MALDI-TOF MS
(Masteroppgave/UIS-TN-IMN/2015;, Master thesis, 2015-06)Recently, Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has developed as vigorous method for the identification of microorganisms in the clinical sector. MALDI-TOF MS is able ... -
Recombinant expression of transglutaminase from Atlantic cod in E. coli
(Masteroppgave/UIS-TN-IMN/2012;, Master thesis, 2012)Transglutaminases (TGs) are a family of enzymes that catalyzes cross linking of proteins by forming covalent bonds between lysine residues and glutamine residues in different polypeptides. Cross-linking reactions are ... -
Recovery of oil spills by dispersants in marine arctic regions
(Masteroppgave/UIS-TN-IMN/2010;, Master thesis, 2010)The initial appearance of dispersants was 1960s and 1970s; oil spill dispersants have been the topic of significant research, testing, and debate. In spite of published reports about dispersant toxicity and effectiveness ... -
Reduction of scaling in biological treatment of industrial waste water at SART
(Master thesis, 2012)Scale formation is one of serious problems for oil industry and water treatment. Thanks to well-developed technologies today these is a wide spectrum of solutions, consisting of chemical inhibitors, evaporators and reverse ... -
Regiospecific synthesis of disubstituted phenanthrenes
(Masteroppgave/UIS-TN-IMN/2014;, Master thesis, 2014-06-16)As the Norwegian oil fields mature, the wells produce more water. This produced water containing a diverse mixture of dissolved PAHs is eventually released to the environment. A major part of these discharges are alkylated ... -
Regiospesific synthesis of dimethylphenanthrenes
(Peer reviewed; Journal article, 2017-05)The dimethylated phenanthrenes 2,3-dimethylphenanthrene (4a), 2,7-dimethylphenanthrene (4b), 2,6-dimethylphenanthrene (4c) and 1,7-dimethylphenanthrene (4d) have been prepared in gram-quantities by a short sequence of ... -
Removal of MBBR Biofilm Solids by Salsnes Filter Fine Mesh Sieves
(Masteroppgave/UIS-TN-IMN/2012;, Master thesis, 2012)Biological wastewater treatment is often used in conjunction with primary treatment to reduce the constituents in wastewater. It is normally necessary to separate the biomass from the treated wastewater in order to meet ... -
Retention and biological uptake of phosphorous in the Leikvollbekken constructed wetland
(Masteroppgave/UIS-TN-IMN/2017;, Master thesis, 2017-06-15)Phosphorous is the limiting nutrient for primary production in freshwater systems and excessively applied as inorganic fertilizer in agriculture. Elevated phosphorous concentrations in recipients can cause eutrophication ... -
A review of the monophyly and composition of the Bengaliinae with the description of a new genus and species, and new evidence for the presence of Melanomyinae in the Afrotropical Region (Diptera, Calliphoridae)
(Book; Peer reviewed, 2011)Mafikengia ciliata gen. nov., sp. nov. is described from South Africa and assigned to the subfamily Bengaliinae of the Calliphoridae. It is recognisable by its small size (4 mm), mostly yellow body, and a number of peculiar ... -
Revision of the Afrotropical species of the Bengalia peuhi species-group, including a species reassigned to the B. spinifemorata species-group (Diptera, Calliphoridae), with notes on the identity of Ochromyia petersiana Loew, 1852 (Diptera, Rhiniidae)
(Book; Peer reviewed, 2012)Eleven Afrotropical species of Bengalia Robineau-Desvoidy, ten in the Bengalia peuhi species-group and one reassigned to the Bengalia spinifemorata species-group, are revised. The male genitalia of all, and the ovipositor ... -
Revision of the Bengalia spinifemorata species-group (Diptera, Calliphoridae)
(Journal article; Peer reviewed, 2011)The Afrotropical Bengalia spinifemorata species-group is revised and their male genitalia illustrated by means of digital colour photography. Six species are recognized and keyed, and their geographical distribution ... -
Revision of the cluster flies of the Pollenia haeretica species-group (Diptera, Calliphoridae)
(Journal article; Peer reviewed, 2010-06-09)The Palaearctic Pollenia haeretica species-group is revised. Two species make up the group: Pollenia haeretica Séguy, 1928 (Algeria, Tunisia, Italy) and Pollenia ibalia Séguy, 1930 (Morocco). Pollenia rungsi Séguy, 1953 ... -
Revision of the Oriental species of the Bengalia peuhi speciesgroup (Diptera, Calliphoridae)
(Peer reviewed; Book; Journal article, 2009-10-08)The Oriental species of the Bengalia peuhi species-group are revised and their male genitalia illustrated by means of digital colour photography. A key to males is presented, complete synonymies are given for all the species ... -
Ricci nilsoliton black holes
(Journal article; Peer reviewed, 2008)We follow a constructive approach and find higher-dimensional black holes with Ricci nilsoliton horizons. The spacetimes are solutions to the Einstein equation with a negative cosmological constant and generalise therefore, ... -
Røntgendiffraksjon : Darwins dynamiske teori for refleksjonsgeometri
(Masteroppgave/UIS-TN-IMN/2012;, Master thesis, 2012)Temaet for masteroppgaven er ``Elementer i dynamisk teori for røntgendiffraksjon''. Oppgaven har utgangspunkt i C. G. Darwins to artikler fra 1914 og hatt som mål å gå igjennom disse på en pedagogisk måte. Det er lagt vekt ... -
Røntgendiffraksjon : Darwins dynamiske teori for transmisjonsgeometri
(Masteroppgave/UIS-TN-IMN/2012;, Master thesis, 2012)En sentral teori innen fagfeltet røntgendiffraksjon, har tradisjonelt vært Ewald-von Laue teorien. En annen, mindre nyttet teori er den Darwin publiserte i 1914. Denne oppgaven tar først utgangspunkt i den kinematiske ...