Blar i Department of Chemistry på utgivelsesdato
Viser treff 61-80 av 432
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Solvolytic lignin degradation in an alcohol / formic acid medium - Analysis of the reaction system and products by means of kinetic modelling and chemometrics
(Doctoral thesis, 2012-10-04)Lignocellulosic biomass has been identified as an abundant renewable resource to produce sustainable alternatives for conventional fossil fuels for the transport sector as well as selected bio-materials and chemicals. ... -
Novel GHB-derived natural products from European mistletoe (Viscum album)
(Peer reviewed; Journal article, 2013)Context: The European white-berry mistletoe [Viscum album L. (Loranthaceae)] is among the oldest known medicinal plants. At present the most important application of mistletoe extracts is in the treatment of cancer. However, ... -
Development of an extraction method for the analysis of pro-inflammatory prostaglandin-E2 and leukotriene-B4 in human plasma by liquid chromatography tandem mass spectrometry
(Master thesis, 2013-02-21)A simple and rapid method for extracting PGE2 and LTB4 from human plasma and further determination by LC-MS/MS proposed and validated. Extracting solvents, formic acid (10 µL) and acetonitrile (140 µL) were added subsequently ... -
Chemical Properties of Alkenes and Alkynes from Carbon 1s Photoelectron Spectroscopy and Theory
(Doctoral thesis, 2013-02-27)The field of electron spectroscopy has evolved extensively the last couple of decades. On one hand, the technology at the synchrotron radiation facilities and of electron analyzers has improved, providing experimental data ... -
Variable selection optimization for multivariate classification of metabolomics data
(Master thesis, 2013-05-21)Variable selection is an important step in multivariate calibration in which the number of variables in the independent variable matrix is reduced by eliminating those that are not related to the response. Many methods ... -
Cyclopentane Hydrate for Hydrate Wetting Studies
(Master thesis, 2013-06-03)Abstract Gas hydrates are often found in the systems for production of petroleum, natural gas and water systems, which is highly undesirable. In some systems the hydrates can form rapidly into large plugs and agglomerate ... -
Biosurfactants as Anti-Agglomerants for Gas Hydrates
(Master thesis, 2013-08-14)Gas hydrate blockages in petroleum pipelines are considered a major hazard in the petroleum industry, and with increasing water content and decreasing temperatures, a solution is sought upon that is both environmentally ... -
Chromatographic Fingerprinting and Quality Control of Herbal Medicines: Comparison of two officinal Chinese pharmacopoeia species of Dendrobii based on High-Performance Liquid Chromatography and Chemometric analysis
(Master thesis, 2013-08-29)The fingerprinting quantitative analysis combining similarity evaluation, Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA) is a valid method for classification of herbal medicine ... -
Physical Chemistry of Mechanisms for Low Salinity Waterflood
(Master thesis, 2013-10-23)Low salinity injection as an alternative EOR method to enhance the production of reserves has for decades been investigated. Increasing evidence that reduction in brine salinity can cause a significant impact on the oil ... -
Solubilization of medium-chained alcohols in some ENORDET O series surfactants
(Master thesis, 2013-10-23)Primary to tertiary pentanol and -hexanol in Shell Chemicals' ENORDET O series IOS 1923, and for primary pentanol in IOS 2024, have been investigated by a thermodynamic approach. Standard partial molar volume and isentropic ... -
Investigation of serum protein profiles in scrapie infected sheep by means of SELDI-TOF-MS and multivariate data analysis
(Peer reviewed; Journal article, 2013-11-14)Background: Classical scrapie in sheep is a fatal neurodegenerative disease associated with the conversion PrPC to PrPSc. Much is known about genetic susceptibility, uptake and dissemination of PrPSc in the body, but many ... -
Interaksjon av Coenzym Q10 på lipidmonolag. Effekt av ulike konsentrasjoner Coenzym Q10 på lipidmonolag studert ved Langmuir monolagsteknikk.
(Master thesis, 2013-12-12)Biologiske membraner er bygd opp som et bilag bestående av lipider, proteiner og karbohydrater. Coenzym Q10 (CoQ10) utgjør den største fysiologiske formen av ubiquinoner hos dyr og mennesker. Denne forbindelsen har ... -
Design, synthesis, and biological evaluation of scaffold-based tripeptidomimetic antagonists for CXC chemokine receptor 4 (CXCR4)
(Journal article, 2014)Structure–activity relationship studies of the cyclopentapeptide CXCR4 antagonists (cyclo(-l-/d-Arg1-Arg2-2-Nal3-Gly4-d-Tyr5-)) suggest that the l-/d-Arg1-Arg2-2-Nal3 tripeptide sequence contained within these cyclopentapeptides ... -
Dimethyl 3,3′-dimethoxybiphenyl-4,4′-dicarboxylate
(Peer reviewed; Journal article, 2014)In the title compound, C18H18O6, the biphenyl moiety is twisted with a dihedral angle of 29.11 (10)°. The carbomethoxy groups form C-C-C-O torsion angles of -18.3 (3) and -27.7 (3)° with the attached rings, as a result ... -
Validation study of ReaxFF-optimized geometries in ruthenium compounds
(Master thesis, 2014-03-14)The present thesis, describes a validation study of ReaxFF-optimized geometries, through statistical tools (i) weighted root mean square of distances and (ii) interatomic distances having as reference 786 X-ray and 11 DFT ... -
Optimization of Separation Efficiency in Temperature Programmed Gas Chromatography : Application of Response Surface Methodology
(Master thesis, 2014-03-14)Chromatographic efficiency can be defined as the maximal number of chromatographic peaks that can be separated within a section of a chromatogram. In isothermal gas chromatography (GC) it is usually measured by number of ... -
Development of a solid phase extraction method for evaluating the production of classic and nonclassic eicosanoids in human and fish cells using liquid chromatography tandem mass spectrometry
(Master thesis, 2014-03-14)Eicosanoids are the major metabolites of fatty acids and they are correlated with many kinds of diseases such as Alzheimer's, cancer and cardiovascular diseases. Usually, most of the eicosanoids derived from omega-6 fatty ... -
Isolation of lipid classes from nutritional marine oils: improved extraction strategy and discrimination studies based on the positional distribution of omega-3 polyunsaturated fatty acids on triacylglycerol structures using liquid chromatography tandem mass spectrometry and principal component analysis
(Master thesis, 2014-03-20)The consumer of the 21st century have developed an awareness of the quality of food products in their diet and the impact of these products on their health which in turn has led to an escalating consumer demand for omega-3 ... -
Methyl 5-iodo-2-methoxybenzoate
(Peer reviewed; Journal article, 2014-04)In the title compound, C9H9IO3, the molecules are close to planar [maximum deviation from benzene ring plane = 0.229 (5) Å for the methyl carboxylate C atom] with the methyl groups oriented away from each other. In the ... -
Chromatographic Fingerprinting of Chinese Grape Berries
(Master thesis, 2014-04-14)Chromatographic fingerprints from three varieties of grapes produced in China (Giant Rose, Red Globe and Summer Black), were obtained by gas chromatography coupled with mass spectrometry. These grapes were subjected to ...