Browsing Department of Chemistry by Issue Date
Now showing items 41-60 of 449
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Physico-Chemistry Characterization of Sulfonated Polyacrylamide Polymers for Use in Polymer Flooding
(Doctoral thesis, 2010-06-01)Hydrolyzed polyacrylamide polymer (HPAM) as a feasible and effective viscosifier has been fully studied and used for polymer flooding processes in several oil field, e.g. Daqing oil field. It has been shown that Hydrolyzed ... -
The intriguing Cyclophilin A-HIV-1 Vpr interaction: prolyl cis/trans isomerisation catalysis and specific binding
(Peer reviewed; Journal article, 2010-10-04)Background: Cyclophilin A (CypA) represents a potential target for antiretroviral therapy since inhibition of CypA suppresses human immunodeficiency virus type 1 (HIV-1) replication, although the mechanism through which ... -
Discrimination of n-3 Rich Oils by Gas Chromatography
(Peer reviewed; Journal article, 2010-11-22)Exploring the capabilities of instrumental techniques for discriminating n-3 rich oils derived from animals is a very important though much neglected area that was emphasized more than 100 years ago. In this study the ... -
Online monitoring of an organic synthesis reaction using Raman and NIR spectroscopy
(Master thesis, 2011)The synthesis of 10-Bromo-1-Decandiol was monitored using Raman and near infrared spectroscopy. Optical fiber Raman and near infrared probes were immersed in the reaction mixture. Raman spectra were recorded every 50 second ... -
Technetium-99 (99Tc) in the North and Nordic Seas – the present status (2010) and a compilation of the Institute of Marine Research’s monitoring data (2003-2009)
(Master thesis, 2011-04-26)Technetium-99 (99Tc) is an anthropogenic, pure β-emitting (Emax = 292 keV) radionuclide with a half-life of 2.13 · 10^5 years. It is present in the marine environment primarily due to discharges from nuclear fuel reprocessing ... -
Origin and character of gaseous hydrocarbons in the hydrate and non-hydrate charged sediments on the Norway - Svalbard margins
(Doctoral thesis, 2011-05-26)Gas incubated in clathrate water-structures, stabilizes the hydrogen bonded substance termed gas hydrate. In the marine environment vast amount of carbon is stored as gas hydrates within the temperature and pressure zone ... -
Ikkje god, ikkje dårleg, men berre OK. Det er bra. Ei kvalitativ studie om etterarbeid ved vurderingar i kjemifaget i vidaregåande skule
(Master thesis, 2011-05-30)This thesis is mainly based on my interviews of four chemistry teachers and nine chemistry pupils. The goal of the thesis is to find out how teachers and pupils continue working with a subject after the pupils has been ... -
Characterization of Linked Polymer Solutions (LPS) – Influence of salinity and divalent ions
(Master thesis, 2011-05-31)Water flooding with addition of polymers cross-linked by polyvalent ions (LPS) has proven to increase the oil recovery both in field applications and laboratory studies, but with constraints on the brine salinity. With of ... -
Analyse og derivatisering av fenolar i biooljer
(Master thesis, 2011-06-01)Dagens samfunn er i stor grad avhengige av fossile brensel for å kunne fungere, og med fleire folkerike land i rask økonomisk vekst, er det venta at forbruket av fossile brensel vil auke ytterlegare i åra framover. Dette ... -
Enzymes for Enhanced Oil Recovery (EOR)
(Doctoral thesis, 2011-06-30)Primary oil recovery by reservoir pressure depletion and secondary oil recovery by waterflooding usually result in poor displacement efficiency. As a consequence there is always some trapped oil remaining in oil reservoirs. ... -
Undersøking av katalysatorar ved solvolyse av lignin og analysering av produktet ved GC-MS, IR og NMR
(Master thesis, 2011-09-08)Med tanke på at petroleum er ein avgrensa ressurs og det moderne samfunnet er så avhengig av den, er det viktig å finne alternativ. Det er nødvendig med alternativ både til drivstoff og til kjemikalieproduksjon. Solvolyse ... -
Theory-Based Mechanistic Insight as Stepping Stone for Catalyst Development in Olefin Polymerization
(Doctoral thesis, 2011-09-29) -
Relative Spatial Positions of Tryptophan and Cationic Residues in Helical Membrane-active Peptides Determine Their Cytotoxicity
(Journal article; Peer reviewed, 2012)The cytotoxic activity of 10 analogs of the idealized amphipathic helical 21-mer peptide (KAAKKAA)3, where three of the Ala residues at different positions have been replaced with Trp residues, has been investigated. The ... -
Catalytic oxidation and reduction of polycyclic aromatic hydrocarbons (PAHs) present as mixtures in hydrothermal media
(Peer reviewed; Journal article, 2012)The reactivity of fluorene, anthracene and fluoranthene under oxidation and reduction conditions has been investigated in this study. This project looks at catalytic and green approaches of converting PAH to less toxic ... -
Stabilisation of Tyrosine Hydroxylase in Nanoparticles for Enzyme Replacement Therapy
(Master thesis, 2012-02-27)The aim of this thesis has been to characterise nanoparticles (NPs) to which tyrosine hydroxylase (TH) was attached, as a preliminary step in their evaluation to be used for an enzyme replacement therapy (ERT) for Parkinson's ... -
Does high offshore petroleum activity affect the lipid composition in wild Atlantic Cod (Gadus morhua) from the North Sea?
(Master thesis, 2012-03-12)A combined two step extraction, using hexane/methanol to extract neutral lipids and chloroform/methanol to extract polar lipids, has been developed and validation. Four times methanol wash were done to hexane/methanol ... -
Reaction monitoring using vibrational spectroscopy
(Master thesis, 2012-03-14)Reaction monitoring by vibrational spectroscopy (VS), especially NIR spectroscopy, is being increasingly used during process development. Analysts usually use spectroscopy to qualitatively monitor the progress of reactions. ... -
Synthesis of Some Nitrogen Heterocycles of Medicinal Relevance
(Doctoral thesis, 2012-04-18)In the first part of the project, two highly functionalized terminal alkynes, 3,3,4,4- tetraethoxybut-1-yne (TEB) and 1,1-diethoxy-but-3-yn-2-one (keto-TEB) have been used for the synthesis of 1,4-disubstituted 1,2,3-triazoles. ... -
Environmental Remediation: Removal of polycyclic aromatic hydrocarbons Dissertation
(Doctoral thesis, 2012-08-17)Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous persistent semi-volatile organic compounds. They are contaminants that are resistant to degradation and can remain in the environment for long periods due to their ... -
Revealing the secrets of proteins: A triple-nuclear and multi-dimensional high-resolution NMR spectroscopy study
(Doctoral thesis, 2012-08-28)Nuclear magnetic resonance (NMR) spectroscopy is one of the major tools for studying the structure and dynamics of proteins in solution. The still ongoing development of new and improved pulse-sequences for multi-dimensional, ...