Browsing Department of Chemistry by Title
Now showing items 352-371 of 466
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Pyridine-Stabilized Fast-Initiating Ruthenium Monothiolate Catalysts for Z-Selective Olefin Metathesis
(Peer reviewed; Journal article, 2017)Pyridine as a stabilizing donor ligand drastically improves the performance of ruthenium monothiolate catalysts for olefin metathesis in comparison with previous versions based on a stabilizing benzylidene ether ligand. ... -
Qualification of New Methods for Measuring In-Situ Rheology of Non-Newtonian Fluids in Porous Media
(Journal article; Peer reviewed, 2020)Pressure drop (ΔP) versus volumetric injection rate (Q) data from linear core floods have typically been used to measure in situ rheology of non-Newtonian fluids in porous media. However, linear flow is characterized by ... -
Qualitative and quantitative analyses of unbound phenolic compounds from pollen grains of pine (Pinus uncinata)
(Master thesis, 2024-06-03)The research in this master project is performed within an interdisciplinary RCN (The Research Council of Norway) research project (QUEST-UV: Quantitative estimates of past UV-B irradiance from fossil pollen) and includes ... -
Quantification of Polyphenols in Seaweeds: A Case Study of Ulva intestinalis
(Peer reviewed; Journal article, 2019-12-03)In this case study, we explored quantitative 1H NMR (qNMR), HPLC-DAD, and the Folin-Ciocalteu assay (TPC) as methods of quantifying the total phenolic content of a green macroalga, Ulva intestinalis, after optimized ... -
Quantitative Comparison against Experiments Reveals Imperfections in Force Fields’ Descriptions of POPC-Cholesterol Interactions
(Journal article; Peer reviewed, 2023)Cholesterol is a central building block in biomembranes, where it induces orientational order, slows diffusion, renders the membrane stiffer, and drives domain formation. Molecular dynamics (MD) simulations have played a ... -
Quantitative NMR analysis of the aqueous phase from hydrothermal liquefaction of lignin
(Journal article; Peer reviewed, 2020-08-06)Hydrothermal liquefaction (HTL) of biomass such as lignin could contribute to finding replacements for petroleum, both as a fuel and production of chemicals. The organic phase produced in formic acid assisted HTL of lignin ... -
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 ... -
Question classification taxonomies as guides to formulating questions for use in chemistry classrooms
(Peer reviewed; Journal article, 2016)Teacher questions play an important role in facilitating classroom discourse. Using appropriate question types and proper questioning techniques help to create reflective- active learners. Teacher questions can elicit ... -
Quinolone-DNA interactions. Interactions and association between Ofloxacin and a DNA-oligomer studied by NMR methods
(Master thesis, 2003)The first part of this thesis examines Ofloxacin (Oflo), a second-generation quinolone, by applying 1D 1H NMR. Molecular dynamics, stacking conditions and the self-diffusion constant were investigated. No certain conclusion ... -
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 ... -
Radiometal Based on Titanium-45 for PET-Imaging
(Master thesis, 2021-09-01) -
Rapid Landscape Changes in Plastic Bays Along the Norwegian Coastline
(Journal article; Peer reviewed, 2021)The Norwegian Coastal Current transports natural debris and plastic waste along the Norwegian coastline. Deposition occurs in so-called wreck-bays and includes floating debris, such as seaweed, driftwood and volcanic pumice, ... -
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. ... -
Reaction monitoring via benchtop nuclear magnetic resonance spectroscopy: A practical comparison of on-line stopped-flow and continuous-flow sampling methods
(Journal article; Peer reviewed, 2023)The ability for nuclear magnetic resonance (NMR) spectroscopy to provide quantitative, structurally rich information makes this spectroscopic technique an attractive reaction monitoring tool. The practicality of NMR for ... -
Recovered Energy from Salinity Gradients Utilizing Various Poly(Acrylic Acid)-Based Hydrogels
(Journal article; Peer reviewed, 2021-02-22)Hydrogels can be utilized to extract energy from salinity gradients when river water mixes with seawater. Saline-sensitive hydrogels exhibit a reversible swelling/shrinking process when they are, alternately, exposed to ... -
Redesigning Clozapine : Development of Clozapine Analogues for the Potential Treatment of Melanoma Brain Metastases
(Doctoral thesis, 2024-11-22)Kreft er den nest vanligste dødsårsaken i Europa. Mangelen på selektiviteten mellom vev danner bivirkninger, uavhengig om behandlingstype. Utvikling av nye behandlinger kan ta opptil 15 år og er kostbart. Gjenbruk av ... -
Reduction in flavor-intense components in fish protein hydrolysates by membrane filtration
(Journal article; Peer reviewed, 2021)Enzymatic protein hydrolysates based on side stream materials from the fish-filleting industry are increasingly explored as food ingredients. However, intense sensory properties, and high salt contents, are often a limiting ... -
Relationship Between Crude Oil Composition and Physical-Chemical Properties
(Master thesis, 2016-06-01)Improving oil recovery by low salinity waterflooding has been of interest in both laboratories and fields in recent years. Understanding how the underlying mechanism affects the final recovery is necessary in order to ... -
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 ... -
A reliable external calibration method for reaction monitoring with benchtop NMR
(Journal article; Peer reviewed, 2023)Nuclear magnetic resonance (NMR) spectroscopy is a powerful analytical technique with the ability to acquire both quantitative and structurally insightful data for multiple components in a test sample. This makes NMR ...