Browsing Department of Mathematics and Natural Sciences by Issue Date
Now showing items 41-60 of 312
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Biodegradation and chemical characterization of petroleum diesel hydrocarbons in seawater at low temperatures
(Masteroppgave/UIS-TN-IMN/2010;, Master thesis, 2010-06)Petroleum hydrocarbons are a major source of marine contamination. Biodegradation, which is fundamental for the natural attenuation of these hydrocarbons in nature, involves mineralization or transformation of organic ... -
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 ... -
A study of the interaction between a kinetic hydrate inhibitor and selected corrosion inhibitors
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)In field operations where natural gas hydrates can occur and CO2 corrosion is a problem, chemicals called inhibitors can be employed. Kinetic hydrate inhibitors (KHIs) and corrosion inhibitors (CIs) are added in small ... -
Pressure effect on biodegradation of hydrocarbons: Naphthalene and BTEX
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)Oil and gas are the most important energy resources in the global economy today. Even though there is a growing concern for global heating, no real alternatives have been found. Current political disturbances in the Arab ... -
Carbide formation on carbon steels in CO2 corrosion by use of applied anodic current
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)The present study aims to validate the method in enriching of iron carbide surface from carbon steels in CO2 corrosion. Applying an anodic current to carbon steel electrodes by galvanostatic measurement was a selected ... -
Effect of pre-exposure of sulfur and iron sulfide on H2S corrosion at different temperatures
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)The study has been carried out to investigate the effect of elemental sulfur and iron sulfide on corrosion behavior of carbon steel in sour environment. It was found that both compounds could form a protective layer of ... -
Part A: Synthesis of acetophenones with possible applications in anthocyanin synthesis. Part B: Synthesis and ring opening of selected strained gem-dihalocyclopropyl ethers
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)Part A: Synthesis of acetophenones with possible applications in anthocyanin synthesis. The preparations of 4 acetophenones were investigated: 4-Hydroxy-3,5-dimethoxyacetophenone, 3,4-dihydroxy-5-methoxyacetophenone, ... -
Investigation and analysis of anaerobic digestion plant at SNJ, IVAR.
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)Biodegradation of organic matter by anaerobic digestion is an old sludge treatment technique. The process offers many advantages with effective conversion of a broad range of organic wastes. The major application of anaerobic ... -
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 ... -
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 ... -
Heat denaturation of proteins from atlantic salmon (salmo salar)
(Master thesis, 2011)Foods preserved by heat treatment have to meet several food safety. These criteria requirements are not easy to meet, as heat causes protein denaturation which is considered to be the one of the main reasons for quality ... -
A study of the effect of pumps and desanding cyclones on oil droplets in produced water
(Masteroppgave/UIS-TN-IMN/2009;, Master thesis, 2011)The production of petroleum resources includes co-producing water. This water contains oil products and needs to be treated before discharge to sea or re-injection into the reservoir. The amount of produced water increases ... -
Biological effects in fish and mussels of oil spill pollution in northern areas
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)The oil and gas activities in the northern region have showed an increase over the last years. This year a new field, Skrugard, was discovered in the Barents Sea and the two parliaments in Norway and Russia confirmed the ... -
Effect of temperature, bicarbonate, and MEG concentration on pre-corroded carbon steels
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)CO2 corrosion in carbon steel has been a major problem in many of oil and gas fields for years. One method that has been known to be effective for corrosion control especially in pipeline is pH stabilization. This method ... -
The use of flotation technology in produced water treatment in the oil & gas industry
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)Produced water quality has become an increasingly large area of concern for the oil production industry. A great deal of scientific research has been carried out to determine the consequences of long term exposure of ... -
Inactivation kinetics of Listeria innocua in steam surface pasteurisation of fish products
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)This master project is a part of the Strategic Institute programme, ProSpect, granted by the Norwegian Research Council (NFR). In order to develop safe minimally processed seafood and to increase quality and shelf-life, ... -
Stratigraphy and play models of Madagascar
(Masteroppgave/UIS-TN-IMN/2009;, Master thesis, 2011)Three western sedimentary basins (Morondava, Majunga and Ambilobe) constitute the main area of interest regarding the hydrocarbon potential of Madagascar. They result from the separation of the island from Africa. Nine ... -
Discriminating the Weyl type in higher dimensions using scalar curvature invariants
(Journal article; Peer reviewed, 2011)We consider higher dimensional Lorentzian spacetimes which are currently of interest in theoretical physics. It is possible to algebraically classify any tensor in a Lorentzian spacetime of arbitrary dimensions using ... -
Environmental consequences associated with a large-scale blowout of oil in the former disputed area between Norway and Russia in the Barents Sea (a case study)
(Masteroppgave/UIS-TN-IMN/2011;, Master thesis, 2011)The former disputed area between Norway and Russia in the Barents Sea is of increasing interest when it comes to oil and gas exploration and production. The area is likely to open for exploration in the near future as the ... -
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 ...