Browsing Department of Chemistry by Issue Date
Now showing items 81-100 of 509
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A strategy for low cost, effective surfactant injection
(Peer reviewed; Journal article, 2014-05)Ideally, in a chemical flooding process, one would like to inject a surfactant solution that has good solubility at the relevant conditions, ultralow interfacial tension (efficient oil mobilisation) and low loss of surfactant ... -
Development and validation of a novel method for serotonin and 5-hydroxyindole-acetic acid determination in plasma using liquid chromatography tandem mass spectrometry
(Master thesis, 2014-05-07)5-Hydroxytryptamine (5-HT) also known as serotonin is a biomarker in gastrointestinal disorder and several other pathological diseases where 5-HT and its metabolite 5-hydroxyindole-acetic acid are implicated. A sensitive ... -
Analytisk karakterisering av asfaltener felt ut ved forskjellige betingelsar frå Athabasca bitumen
(Master thesis, 2014-05-30)Bitumen inneheld organiske sambindingar kor nokre har polare strukturelle trekk som varierar i oppbygnad, eigenskapar og molekylmasse. Dei største og mest polare av desse sambindingane blir under ein samlebetegnelse kalla ... -
Sammenheng mellom løsningsegenskaper, grenseflatespenning og retensjon for et kommersielt surfaktantsystem
(Master thesis, 2014-05-30)For å oppnå en suksessfull surfaktantflømming i økt oljeutvinning, ønsker man generelt å injisere en surfaktantløsning som har gode løsningsegenskaper, reduserer grenseflatespenning mellom vann og olje effektivt, og som ... -
Radioactive contamination in sediments near the sunken nuclear submarine Komsomolets, SW of Bear Island in the Norwegian Sea
(Master thesis, 2014-06-02)The Soviet nuclear submarine Komsomolets sank on the 7th of April 1989, 185 km southwest of the Bear Island in the Norwegian Sea to a depth of about 1655 m. The submarine contains one nuclear reactor, containing long-lived ... -
Quantum Control of Rydberg Atoms
(Master thesis, 2014-06-02)In 2007 the AEGIS experiment was started at CERN with the goal to determine the gravitational acceleration of the antihydrogen atom. This is achieved through accelerating the antihydrogen atoms toward a detector and measure ... -
Optical Properties of Metal Nanoparticle Arrays Created using Electron Beam Lithography for Solar Cell Application
(Master thesis, 2014-06-02)Metal nanoparticles (MNPs) are of key interest in many research fields due to their unique optical properties, which are largely dominated by the localized surface plasmon resonance (LSPR) effect. The LSPR effect gives ... -
An Analysis of CO2, CH4 and Mixed CO2-CH4 Gas Hydrates: Experimental Phase Equilibria Measurements and Simulations with State-of-the-Art Software
(Master thesis, 2014-06-14)The enormous amount of CH4 trapped in gas hydrates has led to a growing focus on gas hydrates as a potential future energy source. One of the proposed methods for the production of CH4 from these deposits, is to exchange ... -
Enhanced Oil Recovery by Combined Low Salinity Water and Polymer Flooding
(Doctoral thesis, 2014-06-19)World energy demand is continuously increasing as the developed and developing countries consume more energy to keep their growing industries running. Significant portion of the energy demand is supplied by fossil energies, ... -
Using MUSIC and CC(CO)NH for Backbone Assignment of Two Medium-Sized Proteins Not Fully Accessible to Standard 3D NMR
(Peer reviewed; Journal article, 2014-06-26)The backbone assignment of medium-sized proteins is rarely as straightforward as that of small proteins, and thus often requires creative solutions. Here, we describe the application of a combination of standard 3D ... -
Purple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae)
(Peer reviewed; Journal article, 2014-09)The functional significance of anthocyanin colouration of lower (abaxial) leaf surfaces is not clear. Two anthocyanins, 5-O-methylcyanidin 3-O-(3″-(β-glucuronopyranosyl)-β-glucopyranoside) (1) and 5-O-methylcyanidin ... -
Multivariate analysis and modeling of crude oil composition and fluid properties relevant for Multiphase Flow Metering
(Doctoral thesis, 2014-09-05)Crude oil composition and properties have been subject for research for several decades, as well as the correlation between the chemical composition and physical properties of crude oil. The physical properties of crude ... -
Towards a Synthesis of the Marine Alkaloid Naamidine B
(Master thesis, 2014-09-15) -
Syntese av Ag-nanopartikler i mikroemulsjoner; kontrollere morfologi ved å variere mikroemulsjonsparametere, reaktanter og stabilisatorer
(Master thesis, 2014-09-30)I denne oppgaven har hovedfokuset vært å undersøke hvorvidt Ag-nanopartikler kan fremstilles i et W/O mikroemulsjonsystem bestående av AOT og dekan. Effekten av å variere ulike parametere som vann-til- surfaktantforhold, ... -
Mutation of the highly conserved ser-40 of the HIV-1 p6 gag protein to phe causes the formation of a hydrophobic patch, enhances membrane association, and polyubiquitination of gag
(Peer reviewed; Journal article, 2014-10-02)The HIV-1 p6 Gag protein contains two late assembly (l-) domains that recruit proteins of the endosomal sorting complex required for transport (ESCRT) pathway to mediate membrane fission between the nascent virion and the ... -
Totalkvikksølv og metylkvikksølv i filet og lever av brosme fiska i Boknafjorden, samanlikna med Hardangerfjorden og Lofoten
(Master thesis, 2014-11-20)Det har i lang tid vore kjend at Hardangerfjorden er forureina, spesielt innerst i fjorden. Tidlegare masteroppgåver som er blitt gjort ved NIFES har funne kvikksølvkonsentrasjonar i brosme (Brosme brosme) frå Hardangerfjorden ... -
Undersøkelse av effekten av katalysatorer og støttematerialer på omdanningen av lignin til LtL-biooljer ved forskjellige betingelser
(Master thesis, 2014-12-19)Verdens petroleumsforbruk har skutt i været de siste tiårene, og man inser at ressursene holder på å gå tom. Dette har tvunget oss til å begynne å tenke på alternative måter å produsere energi og drivstoff på. Lignocellulosisk ... -
Selective rearrangement of terminal epoxides into methylketones catalysed by a nucleophilic rhodium-NHC-pincer complex
(Peer reviewed; Journal article, 2014-12-22)An efficient RhI–NHC–pincer catalyst for the highly regioselective Meinwald rearrangement of monoalkylated epoxides into methylketones under mild conditions is presented. The nucleophilic epoxide opening is assisted by ... -
Changes in the composition of aromatherapeutic citrus oils during evaporation
(Peer reviewed; Journal article, 2015)The composition of some commercial Citrus oils, lemon, sweet orange, and tangerine, designated for aromatherapy, was examined before and after partial evaporation in a stream of nitrogen. The intact oils contained the ... -
Kvantitativ analyse av biooljer fra Ltl-prosessen ved bruk av GC-FID
(Master thesis, 2015-02-12)Etter hvert som energiressurser minker og klima endres, blir det nødvendig med en ny fornybar energikilde som ikke tilfører nytt CO2 til atmosfæren, er kompatibel med nåtidens bilmotorer, samt ikke konkurrerer med ...