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Now showing items 401-500 of 1546
(Master thesis / Masteroppgave, 2017)
We present RP-HPLC methods for the determination of the distribution coefficient at pH 7.4, as log D, and plasma protein binding. Although there are several methods available to determine distribution coefficient (log D) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1971)
(Doctoral thesis / Doktoravhandling, 2017)
This thesis summarizes atomic layer deposition (ALD) of thin films of a set of alkali metal niobates and tantalates with technologically important physical properties.
ALD of LiNbO3 is presented first, where we showcase ...
(Journal article / Tidsskriftartikkel / Published version; Peer reviewed, 2013)
The ferroelectric and electro-optical properties of LiNbO3 make it an important material for current and future applications. It has also been suggested as a possible lead-free replacement for present PZT-devices. The ...
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2017)
Exosomes represent a distinct class of extracellular vesicles of endocytic origin secreted by multiple cell types, including tumour cells. An increased release of exosomes, which appears to be a rich source of biomarkers, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Pre-combustion CO2 capture technologies are becoming viable alternatives to more conventional post-combustion capture by gas emissions scrubbing. The sorbent enhanced water-gas shift (SEWGS) process is a promising future ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)
A convenient of synthesizing pure threo-1-oxiranylethanol is described. Its microwave spectrum has been investigated at the 6-31G* level. The NMR spectrum has been studied extensively for comparison of the conformations ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1996)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1998)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1998)
(Doctoral thesis / Doktoravhandling, 2014)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Metal alkylidenes, which are key organometallic intermediates in reactions such as olefination or alkene and alkane metathesis, are typically generated from metal dialkyl compounds [M](CH2R)2 that show distinctively ...
(Doctoral thesis / Doktoravhandling, 2014)
(Doctoral thesis / Doktoravhandling, 2014)
(Doctoral thesis / Doktoravhandling, 2017)
Cereal crops (such as oats, wheat, barley, rye, corn etc.) are often contaminated with toxigenic fungi during field or storage conditions, which can consequently lead to food and feed contamination with mycotoxins and to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Eutrophication remains a challenge for water quality, and leaching of phosphorus (P) from agriculture remains usually the determining factor as point source emissions of sewage are mainly under control. The Morsa watershed, ...
(Doctoral thesis / Doktoravhandling, 2014)
There are many different solar cell technologies which aim at producing electricity from sunlight cheap and/or efficient. As the efficiency of silicon cells is slowly but continuously climbing, price plummeting, and ...
(Doctoral thesis / Doktoravhandling, 2014)
The interest in organogold compounds continues to grow. Gold(III) complexes are being investigated as catalysts for organic transformations as well as tested as potential anti-cancer drugs. Despite this wide-ranging interest ...
(Doctoral thesis / Doktoravhandling, 2014)
New methods for Born-Oppenheimer molecular dynamics simulations have been developed and used to study protonated water clusters and mechanochemistry of alkanes. The novel algorithms are an efficient coordinate transformation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1981)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The mathematical foundation of the so-called extended coupled-cluster method for the solution of the many-fermion Schrödinger equation is here developed. We prove an existence and uniqueness result, both in the full ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Cyclic volatile methyl siloxanes (cVMS) are emitted to aquatic environments with wastewater effluents. Here, we evaluate the environmental behavior of three cVMS compounds (octamethylcyclotetrasiloxane (D4), decamethylcy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Chemical weathering is a fundamental geochemical process regulating the atmosphere-land-ocean fluxes and earth’s climate. It is under natural conditions driven primarily by weak carbonic acid that originates from atmosphere ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The selection of basic variables in current-density-functional theory and formal properties of the resulting formulations are critically examined. Focus is placed on the extent to which the Hohenberg-Kohn theorem, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
In this paper, an alternative method to range-separated linear-response time-dependent density-functional theory and perturbation theory is proposed to improve the estimation of the energies of a physical system from the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Active regions (ARs) appearing on the surface of the Sun are classified into α, β, γ, and δ by the rules of the Mount Wilson Observatory, California on the basis of their topological complexity. Amongst these, the δ sunspots ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Vacancy-mediated migration of Al in single-crystal zinc oxide (ZnO) is investigated using secondary-ion mass spectrometry (SIMS) combined with hybrid density-functional theory (DFT) calculations. A thin film of Al-doped ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
The N-representability problem is the problem of determining whether there exists N-particle states with some prescribed property. Here we report an affirmative solution to the fermion N-representability problem when both ...
(Master thesis / Masteroppgave, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
It is well known that liquids confined to small nanoscopic pores and droplets exhibit thermal behavior very different from bulk samples. Less is known about liquids spontaneously confined through self-assembly into micellar ...
(Doctoral thesis / Doktoravhandling, 2017)
(Master thesis / Masteroppgave, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
The electronic structure and optical properties of orthorhombic, monoclinic, and rhombohedral (corundum type) modifications of ZnSiO3, and of rhombohedral, tetragonal, and cubic (spinel type) modifications of Zn2SiO4 have ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
We present a study of the electronic structure and optical properties of Si3N4 and Si2N3H in crystalline and amorphous phases by first-principles calculations. We find that besides structural disorder those matrix atoms ...
(Doctoral thesis / Doktoravhandling, 2017)
Eutrophication is globally a growing concern, as freshwater bodies are becoming more and more exposed to nutrient pollution. Excessive P loading is often the main cause of eutrophication, as P is often the limiting nutrient ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Recently, we have implemented a scheme for the calculation of the adiabatic connection linking the Kohn-Sham system to the physical, interacting system. This scheme uses a generalized Lieb functional, in which the ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
To improve lithium and sodium ion battery technology, it is imperative to understand how the properties of the different components are controlled by their chemical structures. Operando structural studies give us some of ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
We have fabricated and tested a photoelectrochemical (PEC) cell where the aqueous electrolyte has been replaced by a proton conducting hydrated Nafion® polymer membrane. The membrane was sandwiched between a TiO2-based ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Several studies have demonstrated that MgH2 is a promising conversion-type anode toward Li. A major obstacle is the reversible capacity during cycling. Electrochemical co-existence of a mixed metal hydride-oxide conversion ...
(Doctoral thesis / Doktoravhandling, 2017)
This dissertation is submitted in partial fulfilment of the requirements for the degree of Philosophiae Doctor (PhD) at Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Oslo, Norway. The ...
(Doctoral thesis / Doktoravhandling, 2016)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Electromagnetic transition strengths and spectroscopic quadrupole moments for 140Sm were measured by means of multi-step Coulomb excitation with radioactive beam at the ISOLDE facility at CERN. A complementary experiment ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
(Doctoral thesis / Doktoravhandling, 2018)
Positron emission tomography (PET) is one of the most sensitive in vivo imaging techniques available to clinicians and researchers. It helps in understanding the biological interactions and mechanism of various diseases ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
(Doctoral thesis / Doktoravhandling, 2023)
In this work, plasmonic metal nanoparticles (MNPs) are utilized to improve the photoelectrochemical (PEC) response of strontium titanate (STO). These MNPs were introduced by either direct exsolution, i.e., nickel (Ni), ...
(Master thesis / Masteroppgave, 2015)
(Master thesis / Masteroppgave, 2015)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The reactions of OH radicals with CH3NHCHO (N-methylformamide, MF) and (CH3)2NCHO (N,N-dimethylformamide, DMF) have been studied by experimental and computational methods. Rate coefficients were determined as a function ...
(Doctoral thesis / Doktoravhandling, 2016)
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2015)
This article reports the creation of tomographic reconstructions giving three-dimensional data on the distribution of various structural features for SAPO-34 zeolite catalyst beds used in the commercially important methanol ...
(Master thesis / Masteroppgave, 2016)
The structure, thickness and characteristics of liquid chromatography (LC) column materials are central factors regarding their performance. However, miniaturized capillaries (sub 20.0 μm inner diameter, typically used for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
A key feature of POPs (Persistent Organic Pollutants) is their potential for long-range atmospheric transport. In order to better understand and predict atmospheric source-receptor relationships of POPs, we have modified ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Background: Scientists and regulatory agencies strive to identify chemicals that may cause harmful effects to humans and the environment; however, prioritization is challenging because of the large number of chemicals ...
(Master thesis / Masteroppgave, 2016)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Elevated concentrations of various industrial-use persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs), have been reported in some developing areas in sub-tropical and tropical regions known to ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
In the past few decades, advances in colloidal nanoparticle synthesis have created new possibilities for the preparation of supported model catalysts. However, effective removal of surfactants is a prerequisite to evaluate ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
A first long-term monitoring of selected persistent organic pollutants (POPs) in Antarctic air has been conducted at the Norwegian research station Troll (Dronning Maud Land). As target contaminants 32 PCB congeners, α- ...
(Master thesis / Masteroppgave, 2016)
3'-Phosphoadenosine-5'-phosphosulfate (PAPS) is the universal donor of sulfate to sulfotransferases, a large group of enzymes that transfer sulfate to various molecules in the sulfation pathway. Methods that have been ...
(Master thesis / Masteroppgave, 2016)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Intercalation of Ba in β-FeSe by ammonothermal synthesis results in the formation of different superconducting phases with interlayer distance ranging between 8.4 and 13.1 Å. The values of Tc are primarily dependent on Ba ...
(Doctoral thesis / Doktoravhandling, 2007)
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The synthesis, characterization and catalytic performance of offretite with four distinct crystal morphologies (oval, hexagonal, broccoli-like, and spherical) are presented. As a member of the ABC-6 family of zeolite ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
The neuropeptide oxytocin (OT) is associated with a plethora of social behaviors, and is a key topic at the intersection of psychology and biology. However, tools for measuring OT are still not fully developed. We describe ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
A variety of synthetic procedures have been used to obtain zeolite ZSM-23 (MTT) catalysts with crystallite sizes ranging from the micrometer to nanometer scale. When the acidic zeolite is used as catalyst for the Methanol ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Passive air samplers (PAS) were deployed at 86 European background sites during summer 2006 in order (i) to gain further insight into spatial patterns of persistent organic pollutants (POPs) in European background air and, ...
(Master thesis / Masteroppgave, 2013)
Rare earth elements (REEs) are greatly demanded in modern technology industries and are widely used in several technological applications. The ability of the REEs to carry out their unique properties in their specific ...
(Master thesis / Masteroppgave, 2014)
With large countries as India and China in tremendous development accompanied by a growing worldwide population, questions arise in how energy demands can be met in the post-oil society. The methanol-to-hydrocarbon process, ...
(Master thesis / Masteroppgave, 2014)
Sample preparation in bottom-up proteomics consists of denaturation, reduction and alkylation of the proteins, before enzymatic digestion of the proteins into peptides. The rate limiting step is the enzymatic digestion, ...
(Master thesis / Masteroppgave, 2014)
The purpose of this thesis was to check if it was possible to prepare a mechanical and chemical system that can reduce Seaborgium, element 106, and separate between the reduced and the oxidized state. To do this the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
A recently proposed variation principle [N. I. Gidopoulos, Phys. Rev. A 83, 040502(R) (2011)] for the determination of Kohn–Sham effective potentials is examined and extended to arbitrary electron-interaction strengths and ...
(Master thesis / Masteroppgave, 2016)
Liquid chromatography-mass spectrometry (LC-MS) approaches for measurement of biomarkers are increasing in popularity due to the selectivity and sensitivity. To match the detection limits of the immunoassay approaches (such ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Papain-like cysteine proteases (PLCPs) constitute the largest group of thiol-based protein degrading enzymes and are characterized by a highly conserved fold. They are found in bacteria, viruses, plants and animals and ...
(Doctoral thesis / Doktoravhandling, 2010)
Catalysis by platinum Pt and other noble metals is involved in industrial processes that convert petroleum and natural gas resources to useful fuels and other value-added chemicals. The cleavage of carbon-hydrogen bonds ...
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The synthesis of Zr-MOFs under green, industrially feasible conditions was investigated. Two new compounds with bcu-topology and the fluorinated analogue of UiO-66 exhibiting fcu-topology were obtained and characterised. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Complete active space self-consistent field (CASSCF) wavefunctions and an orbital entanglement analysis obtained from a density-matrix renormalisation group (DMRG) calculation are used to understand the electronic structure, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Long-term laborious and thus costly monitoring of phosphorus (P) fractions is required in order to provide reasonable estimates of the levels of bioavailable phosphorus for eutrophication studies. A practical solution to ...
(Doctoral thesis / Doktoravhandling, 2007)
Tracers of Nb, Ta, and the pseudo-homologue Pa were used to model the chemical behaviour of dubnium in the development of suitable liquid-liquid extraction systems for the SISAK centrifuge system. Extraction from sulphuric ...
(Doctoral thesis / Doktoravhandling, 2013)
The main aim of this Ph.D. project was to study, understand and improve the current knowledge on the Cu-based catalytic reaction in the conversion of ethylene-to-1,2-dichloroethane (oxychlorination), a crucial intermediate ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Methanol syntheses at low temperature in a liquid medium present an opportunity for full syngas conversion per pass. The aim of this work was to study the role of solvents polarity on low-temperature methanol synthesis ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
A glutathione (GSH) adduct of the mycotoxin 4-deoxynivalenol (DON), together with a range of related conjugates, has recently been tentatively identified by LC-MS of DON-treated wheat spikelets. In this study, we prepared ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Background Optimizing resuscitation is important to prevent morbidity and mortality from perinatal asphyxia. The metabolism of cells and tissues is severely disturbed during asphyxia and resuscitation, and metabolomic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Conjugation of deoxynivalenol (DON) with sulfur compounds is recognized as a significant reaction pathway, and putative DON–glutathione (DON–GSH) conjugates have been reported in planta. To understand and control the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Cyclic volatile methylsiloxanes (cVMS) are used in personal care products and emitted to aquatic environments through wastewater effluents, and their bioaccumulation potential is debated. Here, a new bentho-pelagic version ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Oxidation state (OS) is defined using ionic approximation of bonds. Two principal algorithms are outlined for OS determination in a chemical compound described by a Lewis formula or bond graph. Typical origins of ambiguous ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Thermal evolution of the Fe2+–Fe3+ valence mixing in YBaFe2O5 is investigated using Mössbauer spectroscopy. In this high-spin double-cell perovskite, the d6 and d5 Fe states differ by the single minority-spin electron which ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2006)
Magnetoresistance, electrical transport, and magnetic properties associated with a two-step Verwey-type transition in BaGdFe 2 O 5 + w (− 0.015 < w < 0.181 ) are studied as a function of temperature and oxygen nonstoichiometry ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2001)
Electronic, magnetic, and structural phase transitions in nearly stoichiometric TbBaFe 2 O 5 + w ( 0.00 < w < 0.05 ) have been investigated. At high temperatures this compound is a paramagnetic, mixed-valence (Fe 2 . 5 + ...
(Doctoral thesis / Doktoravhandling, 2018)
Magnetic properties are an important application area in quantum chemistry. However, for the most widely used method in electronic structure calculations, density-functional theory, it is still not understood how to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
A PTR-QiTOF instrument was deployed in the field in the vicinity of the CO2 Technology Center Mongstad (TCM) for measuring amines in ambient air. The observed single-to-double-digit pptv levels of dimethylamine (DMA) and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2000)
The oxygen-deficient double perovskite YBaCo 2 O 5 , containing corner-linked CoO 5 square pyramids as principal building units, undergoes a paramagnetic to antiferromagnetic spin ordering at 330 K. This is accompanied ...
(Master thesis / Masteroppgave, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1999)
A mixed-valence state, formally denoted as Fe 2 . 5 + , is observed in the 300 K Mössbauer spectra of the most reduced samples of SmBaFe 2 O 5 + w . Upon cooling below the Verwey-type transition temperature (TV≈ 200 K ) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)
The results of polarized micro-Raman scattering experiments on YBa 2 Fe 3 O 8 + δ with δ=0.1 are reported. We identified seven out of the total ten by symmetry Raman-allowed phonons at 134 cm − 1 ( A 1 g ), 148 cm − 1 ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
Rare earth double perovskites comprise a class of functional oxides with interesting physiochemical properties both for low- and high-temperature applications. However, little can be found relating electrical properties ...