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Now showing items 1-100 of 1546
(Master thesis / Masteroppgave, 2017)
Denne oppgaven har hatt flere mål. Det første var å syntetisere AlPO-5 krystaller med varierende lengde samt undersøke effekten synteseparameterne konsentrasjon og aldring av syntese-gel kan ha på morfologi og størrelse. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1993)
© 1993 Acta Chemica Scandinavica
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)
The nuclear and magnetic structures of ( Y 1 − x Ca x ) Ba 2 Fe 3 O 8 + δ with x=0.05, 0.10, and 0.20 have been investigated by neutron-powder diffraction at room temperature. The compound crystallizes with the symmetry ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2004)
Two types of chemical-pressure effects on the Verwey-type transition in Ba Sm Fe 2 O 5 are studied, viz., ionic-size contractions at the Ba and Sm sites. Whereas the replacement of Sm by the smaller Eu and Gd atoms increases ...
(Master thesis / Masteroppgave, 2018)
Quinolones are a class of synthetic compounds that are used as antibacterial agents since their discovery in the 1960s. Their chemical synthesis has mostly been based on ring-closing reactions, for instance the Gould-Jacobs ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)
© 1992 Acta Chemica Scandinavica
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
A one pot catalytic system which involves Cu and an alkoxide co-catalyst has been used for methanol (MeOH) synthesis at low temperature. Up to about 92% syngas conversion per pass and more than 90% selectivity to MeOH (the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2004)
Pressure effects on the charge-ordering (CO) transition have been investigated for an oxygen-deficient double-perovskite cobalt oxide, BaYCo 2 O 5.0 , through resistivity measurements using a piston-cylinder-type clamp ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1991)
© 1991 Acta Chemica Scandinavica
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)
© 1994 Acta Chemica Scandinavica
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)
The nuclear and magnetic structures of YBa 2 Fe 3 O 8 have been investigated by powder neutron diffraction at room temperature. The nuclear structure of the compound has the symmetry of space group P4/mmm and lattice ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1991)
© 1991 Acta Chemica Scandinavica
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1990)
© 1990 Acta Chemica Scandinavica
(Master thesis / Masteroppgave, 2017)
The purpose of this work is to systematically assess the consequences of a potential radiological attack on processed food in a production facility. Infant milk formula (IMF) is specifically chosen as the case of investigation. ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2008)
Zeolites with the CHA topology have been synthesized with Si/Al ratios ranging from 15 to 133. ICP-AES analysis shows that the Si/Al ratio in the material is close to linearly related to the Si/Al ratio in the reaction ...
(Master thesis / Masteroppgave, 2017)
In this thesis, structural and dynamic features of thermoresponsive amphiphilic pentablock copolymers have been studied for their potential use for drug delivery application. The copolymers are amphiphilic poly(ethylene ...
(Doctoral thesis / Doktoravhandling, 2014)
Gangliosides are sialic acid-containing glycosphingolipids expressed on all vertebrate cells. They are primarily positioned in the plasma membrane, with the ceramide part anchored in the membrane and the glycan part exposed ...
(Master thesis / Masteroppgave, 2006)
Hensikten med denne oppgaven var å bestemme kvikksølv i jord i et nedbørfelt.
Kvikksølv er en langtransportert luftforurensing som slippes ut fra antropogene så vel som naturlige kilder. Kvikksølv på elementær form blir ...
Syntese av Li-holdige filmer med ALCVD Restricted Access
(Master thesis / Masteroppgave, 2008)
(Master thesis / Masteroppgave, 2009)
This work presents the first reported thin film deposition of α-Bi2O3 by ALD (Atomic Layer Deposition). In addition, thin films of Co3O4 and CoO are for the first time reported deposited by ALD from the respective novel ...
(Master thesis / Masteroppgave, 2014)
The possibility for performing self-diffusion measurements by Carr-Purcell-Meiboom-Gill (CPMG) experiments using the inherent magnetic field inhomogeneities as a gradient field were tested for six sample molecules, using ...
(Master thesis / Masteroppgave, 2019)
Organoids and organ-on-a-chip (OoC) are human-induced pluripotent stem cell-derived miniaturized organs that recapitulate organ specific functions. They open up a plethora of opportunities to change the way we test drugs, ...
En studie av reaksjoner mellom pyrrol og halodiazoacetater Restricted Access
(Master thesis / Masteroppgave, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The catalytic mechanism of the cyclic amidohydrolase isatin hydrolase depends on a catalytically active manganese in the substrate-binding pocket. The Mn2+ ion is bound by a motif also present in other metal dependent ...
(Doctoral thesis / Doktoravhandling, 2014)
This thesis presents experimental work on thin films of different compounds containing lithium, sodium or potassium has been synthesized by atomic layer deposition (ALD). The overall motivation for this work has been to ...
(Doctoral thesis / Doktoravhandling, 2013)
Facing the increasing environmental degradation locally and globally, the Chinese government sets mandatory goals of 10% reduction of SO2 emission and 20% reduction of energy intensity in its 11th Five-Year Plan period ...
(Master thesis / Masteroppgave, 2013)
4-Substituted pyrido[1,2-e]purines as anticancer agents have the ability to intercalate with DNA molecules and display improved cytotoxic activities especially towards the resistant cancer cell lines (MCF7R). These compounds ...
(Master thesis / Masteroppgave, 2014)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
(Master thesis / Masteroppgave, 2014)
(Doctoral thesis / Doktoravhandling, 2012)
Fuel cells are expected to serve as a contribution to meet the demand for clean energy. High temperature fuel cells such as solid oxide fuel cells (SOFC) and proton ceramic fuel cells (PCFC) are developed for use as ...
(Doctoral thesis / Doktoravhandling, 2017)
Lithium-ion batteries (LIBs) are the power source of choice for portable devices and electric vehicles. The technology is increasingly used for large-scale stationary energy storage to balance supply and demand of intermittent ...
(Master thesis / Masteroppgave, 2007)
The work is based on possible protonic transport in LaNb3O9. This ABO3–type perovskite is known to have large voids in the lattice due to many inherent A-site metal vacancies. Acceptor-doping of this material may facilitate ...
(Master thesis / Masteroppgave, 2014)
Inntak av rusmidler endrer signaliseringssystemet av nevrotransmittere i hjernen. For å kunne vurdere effekten av forskjellige rusmidler er det derfor viktig å kunne bestemme nivåene av nevrotransmittere. Dette kan studeres ...
(Doctoral thesis / Doktoravhandling, 2009)
Nøyaktige simuleringer av kjemiske og biologiske prosesser på molekylært nivå har lenge vært uoppnålig for en rekke molekylære systemer, og har nå blitt mulig for mange av disse systemene gjennom ny metodeutvikling av ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We present the first analytic implementation of cubic and quartic force constants at the level of Kohn–Sham density-functional theory. The implementation is based on an open-ended formalism for the evaluation of energy ...
(Master thesis / Masteroppgave, 2014)
The prevalence of gold catalysis in the synthetic community has increased dramatically within the last few years, and a wide range of N-heterocyclic carbene (NHC) gold(I) and, to a lesser extent, gold(III) complexes have ...
(Doctoral thesis / Doktoravhandling, 2017)
The aim of the study was to advance the chemistry related to aminophosphonic acids. After reviewing the available literature, our attention was drawn towards the preparation of chiral ∝-aminophosphonic acids and derivatives ...
(Master thesis / Masteroppgave, 2014)
Understanding Eutrophication
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Two forms, α and β, are known for the racemic amino acid DL-methionine, C5H11NO2S. The phase transition between them, taking place around 326 K, is associated with sliding at the central interfaces of the hydrophobic ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2015)
The Ruddlesden–Popper (RP3) type oxides, La4Co3O10+δ and La4Ni3O10+δ, form a complete solid solution. Powder X-ray and neutron diffraction data show that La4(Co1−xNix)3O10+δ is isostructural to the monoclinic La4Co3O10+δ ...
(Master thesis / Masteroppgave, 2017)
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
A selective sampling procedure is applied to reduce the number of density functional theory calculations needed to find energetically favorable grain boundary structures. The procedure is based on a machine learning algorithm ...
(Doctoral thesis / Doktoravhandling, 2015)
Det er den organiske formen av kvikksølv, metylkvikksølv, som står i sentrum for kvikksølvforskningen. Metylkvikksølv anrikes opp gjennom næringskjedene, så selv om vannet ikke inneholder mye kvikksølv kan fisk allikevel ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
A novel open tubular nanoproteomic platform featuring accelerated on-line protein digestion and high-resolution nano liquid chromatography mass spectrometry (LC-MS) has been developed. The platform features very narrow ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Iso-octyl chain-hydroxylated oxysterols were determined in attomoles per 10,000 cells concentrations in 10,000–80,000 cultured pancreatic adenocarcinoma cells, using a sensitive, highly automated nano-LC-ESI-MS-based method. ...
(Master thesis / Masteroppgave, 2014)
In this project four oxide systems have been studied with focus on synthesis and characterization; LaxSr4-xFeO10-δ(0.00 ≤ x ≤ 1.00), LaSr3Fe3-yMnyO10-δ (0.50 ≤ y ≤ 1.50), Sr4Fe3--z(CO3)zO10-4z-δ (0.00 ≤ z ≤ 1.00) and ...
(Doctoral thesis / Doktoravhandling, 2016)
Resistance to chemotherapy and/or radiotherapy limits the effectiveness of cancer treatment. One factor that can contribute to resistance is the process of DNA repair. Among the different DNA repair pathways, the base ...
(Master thesis / Masteroppgave, 2015)
(Doctoral thesis / Doktoravhandling, 2015)
Energy demand and emissions of greenhouse gases are increasing. The use of renewable energy such as solar energy, hydro power and wind power can help mitigate further emissions. Transparent conducting oxides (TCO’s) are ...
(Master thesis / Masteroppgave, 2015)
Oxysterols in biological samples of limited size are present in low concentrations thus sensitive methods are advantageous. Derivatization of oxysterols prior to liquid chromatography (LC) mass spectrometry (MS) analysis ...
(Doctoral thesis / Doktoravhandling, 2020)
Materials with pores of controlled size and connectivity are of fundamental importance in chemical industry and research. The pores in microporous materials, which have the same dimensions as individual molecules, can be ...
(Doctoral thesis / Doktoravhandling, 2018)
Two of the biggest challenges for the world today are the global warming, partly resulting from the increased CO2 emissions, and the need of new energy sources due to an increasing world population and the necessary ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Mathematical models are investigated and suggested for the calculation of the elastic stiffness of polymer nanocomposites. Particular emphasis is placed on the effect on the elastic stiffness from agglomerates and the ...
(Master thesis / Masteroppgave, 2015)
Poly(styrene co-divinylbenzene) (PS-DVB) monolithic pre-columns of 50 μm inner diameter (ID) were developed for peptides and small molecules enrichment intended for use in automated miniaturized liquid chromatography-mass ...
(Doctoral thesis / Doktoravhandling, 2018)
This thesis has got two parts within the common theme of Diels-Alder reactions. One part starts with the group of natural products called asmarines. These compounds, which were found in the red sea sponges, were believed ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Neurons communicate via chemical signals called neurotransmitters (NTs). The numerous identified NTs can have very different physiochemical properties (solubility, charge, size etc.), so quantification of the various NT ...
(Master thesis / Masteroppgave, 2015)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We used multiple sets of simulations both at the atomistic and coarse-grained level of resolution to investigate interaction and binding of α-tochoperol transfer protein (α-TTP) to phosphatidylinositol phosphate lipids ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
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 ...
(Master thesis / Masteroppgave, 2019)
Polymer micelles can be used in pharmaceuticals, detergents, cosmetics and have a potential for drug delivery systems. In many applications of polymeric micelles, there are also surfactant molecules present. Still, it is ...
Utforsking av potensielle forløparar for atomlagsavsetting av gull Restricted Access
(Master thesis / Masteroppgave, 2015)
Tynne filmar av eit materiale som kan leie straum godt, vere kjemisk inert og spegle varmestråling godt er, i alle fall med ALD, i dag ikkje mogleg. Arbeidet i denne oppgåva har som hovudtema å undersøke om ein serie med ...
(Master thesis / Masteroppgave, 2015)
(Master thesis / Masteroppgave, 2015)
Masteroppgaven er en undersøkelse som ble gjort i forbindelse med 65.000 kjemisett som ble laget for å markere 150 års jubileet for massevirkningsloven. Massevirkningsloven ble framsatt av to unge, lovende forskere Cato ...
(Master thesis / Masteroppgave, 2015)
Naturproduktet myxin er et potensielt nytt legemiddel mot akutt myelogen leukemi (AML). Myxin er praktisk talt uløselig i vann, og frem til idag er det ikke rapportert noen effektiv syntese av dette naturproduktet. En ...
(Master thesis / Masteroppgave, 2015)
The interest in organogold compounds has seen a great development during the last years. Gold(III) complexes are investigated as potential anti-cancer drugs and homogeneous catalysts for organic transformations. Nucleophilic ...
(Master thesis / Masteroppgave, 2015)
The carbon dioxide (CO2) concentration in the atmosphere has increased dramatically over the last century, and much of this increase is a direct consequence of human activities. Being a greenhouse gas, CO2 significantly ...
Molecular Modeling of Nucleosome Core Particles Restricted Access
(Master thesis / Masteroppgave, 2023)
Nucleosomes, the basic units of chromatin in eukaryotes, play a critical role in DNA processing such as transcription, replication, and repair. The canonical nucleosome core particle consists of 145 to 147 DNA base pairs ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Land and atmospheric initial conditions of the Weather Research and Forecasting (WRF) model are often interpolated from a different model output. We perform case studies during NASA's SEAC4RS and DISCOVER-AQ Houston airborne ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
Selective hydrogenation of CO2 into value-added hydrocarbons, particularly single products, is of great interest. However, this is a challenge because of the simultaneous occurrence of numerous competing elementary reactions. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Wildfires emit significant amounts of pollutants that degrade air quality. Plumes from three wildfires in the western U.S. were measured from aircraft during the Studies of Emissions and Atmospheric Composition, Clouds and ...
(Master thesis / Masteroppgave, 2018)
The increasing demand for faster and more efficient separations for biological samples have driven organic polymer-based monolithic columns back into the spotlight. The nature of the monolithic structure allows the use of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Chemical models must correctly calculate the ozone formation rate, P(O3), to accurately predict ozone levels and to test mitigation strategies. However, air quality models can have large uncertainties in P(O3) calculations, ...
Vapour-solid interactions for SMSB and asymmetric amplification of pyrimidine and pyridine aldehydes
(Doctoral thesis / Doktoravhandling, 2022)
In the last 25 years, the addition of diisopropylzinc to pyrimidine carbaldehydes, known nowadays as the Soai reaction, has drawn the attention of many research groups, not only as it is to date the only chemical reaction ...
(Doctoral thesis / Doktoravhandling, 2013)
The basis of supramolecular chemistry is a detailed knowledge of fundamental molecular properties and non-covalent interactions, which is dedicated to the preparation of novel structures as functional materials. Here we ...
(Master thesis / Hovedoppgave, 2004)
This study was conducted to determine whether the physio-chemical properties of dissolved natural organic matter (DNOM) of similar origin are affected by the dissolved organic carbon (DOC) sample concentration and time in ...
(Master thesis / Masteroppgave, 2008)
Den siste tiden har inhibitorer av reopptakstransportører for nevrotransmittere blitt viet stor oppmerksomhet. Det er gjort mange forsøk på å finne nye forbindelser, ettersom denne typen inhibitorer kan ha interessante ...
(Master thesis / Masteroppgave, 2011)
Abstract
c-Myb is a gene-specific transcription factor involved in the regulation of many target genes.
As with other oncoproteins, an atypical function of the c-Myb may lead to uncontrolled cell growth and division that ...
(Master thesis / Masteroppgave, 2006)
Industrial development in China has accelerated rapidly in the last few decades. This has led to a range of environmental problems. Deposition of trace metals to forest ecosystems via the atmosphere is a potential regional ...
(Master thesis / Masteroppgave, 2011)
Målet med prosjektet var å få mer kunnskap og forståelse om de fysikalske og kjemiske egenskapene til
én-dimensjonale kjeder av sinkoksid som en tilnærming til sinkoksidnanotråder.
Hovedfokuset har vært å forstå de ...
(Master thesis / Masteroppgave, 2009)
Organokatalyse er et felt i vekst etter at det ble gjenoppdaget rundt år 2000. Samtidig har immobilisert organokatalyse også blitt viet mer oppmerksomhet de siste ti årene. Til nå har det vært vanlig å immobilisere ...
(Master thesis / Masteroppgave, 2007)
SAMMENDRAG
Plastposer og plastfolier laget fra polyetylen (PE) er ofte gjenstand for bevismateriale i kriminalsaker, enten det er innhentet fra et åsted eller beslaglagt fra personer. Å kunne spore plastmaterialet, ...
(Master thesis / Masteroppgave, 2011)
The present thesis is focused on the methodology of lithiation-halogenation of 6-chloro-9-substituted purines and 9-substituted adenines via 8-purinyl anions. As an extension of this work, lithiation-halogenation of ...
Metylering av alkener og aromater med metanol over H-ZSM-5 og H-beta Restricted Access
(Master thesis / Masteroppgave, 2010)
I denne oppgaven er to ulike topologier studert, MFI og *BEA, hvor fire ulike materialer er benyttet, H-ZSM-5 I, H-beta I, H-ZSM-5 II og H-beta II. H-beta I og H-ZMS-5 I har omtrent samme tetthet av sure seter, Si/Al-forhold~130. ...
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2008)
Some types of cancers are more difficult to treat than others, and to date, there is no general accepted standard approach how to treat pancreatic cancer. The aim of this project was to
construct an immunotoxin with an ...
(Master thesis / Hovedoppgave, 2006)
Nye materialer med bedre egenskaper og nye bruksområder søkes kontinuerlig av forskningsgrupper rundt om i verden. Blant disse er ferroelektriske/piezoelektriske materialer med perovskittype struktur av stor interesse for ...
(Master thesis / Hovedoppgave, 2005)
SAMMENDRAG
Dette arbeidet har tatt for seg for seg oligomerisering av 1-buten, propen og eten over de fire protonsure zeolittene H-Beta, H-ZSM-5, H-USY og H-MOR. Forsøkene har blitt utført i et reaktoranlegg med 1 atm som ...
(Master thesis / Hovedoppgave, 2003)
A review on the use of packed capillary columns in gas chromatography (GC) is presented. Several articles on the invention of packed capillary columns have been published, as well as on the progress and the development of ...
(Master thesis / Masteroppgave, 2006)
The physiological role of the serotonin receptor 5-ht1E is not yet understood, and little is known about its pharmacological effects. An aim of this project has been to establish a new synthetic route to potential 5-ht1E ...
(Master thesis / Masteroppgave, 2006)
The 5-ht1E receptor is one of the least known serotonin receptors. Little has been reported about its pharmacological effects and the physiological role is not known. One of the reasons for this is that no selective agonists ...
(Master thesis / Masteroppgave, 2008)
Chinas fast-growing economy has led to an increase in the releases of many heavy metals. These releases affect both the local environment through soil and water contamination, but also the regional and global environment ...
(Master thesis / Hovedoppgave, 2006)
ABSTRACT
The main aim for the work on this thesis was to find a fast and sensitive method for qualitative and quantitative determination of the naphthenic acids (NAs) called the ARN acid family in crude oil. As there are ...
(Master thesis / Masteroppgave, 2010)
(Master thesis / Hovedoppgave, 2004)
(Master thesis / Hovedoppgave, 2004)
Oppgaven har tatt for seg interaksjoner mellom metallene aluminium, kobber, kadmium, jern og bly og naturlig organisk materiale i vann. Grunnstoffene det er sett på kan alle bli kompleksert av naturlig organisk materiale. ...
(Master thesis / Masteroppgave, 2006)
Sammendrag
Oppgaven har fokusert på synteseteknikker for fremstilling av monodisperse frittstående nanokuber av Co3O4 og deponering av oksidiske materialer på nanokrystaller med ALCVD (Atomic Layer Chemical Vapour ...
(Master thesis / Hovedoppgave, 2004)
Dette arbeidet har i hovedsak tatt for seg studiet av en høytemperatur brenselcelle med protonledende elektrolytt for hydrogen og ammoniakk i temperaturintervallet 600 - 900ºC. BaCe0,9Y0,1O2,95 (BCY) ble benyttet som ...
Hydrophilic interaction chromatographic separation of 8 deoxynucleotide triphosphates (dNTPs) and nucleotide triphosphates (NTPs). Restricted Access
(Master thesis / Masteroppgave, 2010)
Eight deoxynucleoside triphosphates (dNTPs) and nucleoside triphosphates (NTPs): ATP, CTP, GTP, UTP, dATP, dCTP, dGTP and dTTP, were separated using two 15 cm, 2.1. mm I.D. ZIC-pHILIC columns coupled in series, using simple ...