Blar i Fakultet for naturvitenskap (NV) på tittel
Viser treff 12409-12428 av 12453
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XAS investigation of silica aerogel supported cobalt rhenium catalysts for ammonia decomposition
(Peer reviewed; Journal article, 2020)The implementation of ammonia as a hydrogen vector relies on the development of active catalysts to release hydrogen on-demand at low temperatures. As an alternative to ruthenium-based catalysts, herein we report the ... -
XPS and GDOES characterization of porous coating enriched with copper and calcium obtained on tantalum via plasma electrolytic oxidation
(Peer reviewed; Journal article, 2016)XPS and GDOES characterizations of porous coatings on tantalum after Plasma Electrolytic Oxidation (PEO) at 450 V for 3 minutes in electrolyte containing concentrated (85%) phosphoric acid with calcium nitrate and copper ... -
XPS Examination of the Oxide-Metal Interface of an Aluminum-Magnesium Alloy Containing Beryllium
(Chapter, 2018)The addition of beryllium to high magnesium aluminum alloys has long been known to cause a significant decrease in the rate of alloy oxidation. A clear understanding of the fundamental mechanism behind this effect is still ... -
Yb-Doped Fiber Lasers Operating in the Range of 1147-1200 nm
(Chapter, 2012)Pump source brightness and heat production per unit fiber length were found to be the critical parameters for the realized and investigated Yb-doped fiber lasers operating in the range of 1147-1200 nm. -
Yb-Tm energy transfer in Y-codoped fibers
(Chapter, 2013)Experimental investigation of Yb-Tm energy transfer process in Yb/Tm-doped fibers with Y-codoping provided a fairly high energy transfer efficiency of 50 %, making lasers based on these glass fibers attractive for diode-pumping ... -
YDFL Operating in 1150-1200-nm Spectral Domain
(Journal article; Peer reviewed, 2013)A family of high-power Yb-doped fiber lasers operated in the range of 1150–1180 nm with output powers of up to 35 W and optical efficiencies up to 60% is realized. Operation at 1200 nm is also demonstrated. Amplified ... -
Yield-increasing additives in kraft pulping: Effect on carbohydrate retention, composition and handsheet properties
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:137, Doctoral thesis, 2008) -
Youngs's modulus of tumour tissue from an in vivo breast cancer model - effect of treatment with guluronate oligosaccharides
(Peer reviewed; Journal article, 2019)Increased tissue stiffness is a classic characteristic of solid tumours, and breast tumours are often first identified as a palpable lump. Increased tissue stiffness in tumours is more than just a typical, and often easily ... -
Yrkesfaglig praksis i bachelorutdanningen for yrkesfaglærere: En kartlegging av studentenes erfaringer
(Journal article; Peer reviewed, 2018)This study examines experiences of vocational teacher students in practice at work places. The aim is to develop and ensure that the practice is in accordance with the purpose of the Vocational Teacher Education programme ... -
Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming
(Journal article; Peer reviewed, 2018)Yttrium modified Ni-based double-layered hydroxides were tested as novel catalysts in dry methane reforming. The catalysts were characterized by XRF, BET analysis, XRD, TPR-H2, TPD-CO2, TGA/DSC-MS, H2 chemisorption and ... -
Z2 characterization for three-dimensional multiband Hubbard models
(Peer reviewed; Journal article, 2020)We introduce three numerical methods for characterizing the topological phases of three-dimensional multiband Hubbard models based on twisted boundary conditions, Wilson loops, as well as the local topological marker. We ... -
Zebrafish (Danio rerio) behaviour is largely unaffected by elevated pCO2
(Peer reviewed; Journal article, 2016)Ocean acidification, the decrease in ocean pH caused by anthropogenic emission of carbon dioxide, can cause behavioural disturbances in marine teleost species. We investigated whether AB-strain zebrafish (Danio rerio) show ... -
Zernike phase contrast in high-energy x-ray transmission microscopy based on refractive optics
(Journal article; Peer reviewed, 2018)The current work represents the first implementation of Zernike phase contrast for compound refractive lens based x-ray microscopy, and also the first successful Zernike phase contrast experiment at photon energies above ... -
Zero strain cathode
(Master thesis, 2023)For å realisere fast fase-batterier som en levedyktig, markedsklar teknologi må problemer med tap av kontakt mellom batterikomponenter løses, da det medfører tap av kapasitet som til slutt ødelegger batteriet. En av ... -
Zero temperature superconductor–edge metal–insulator transition in two-dimensional bosonic systems
(Peer reviewed; Journal article, 2022)Motivated by the recent experimental observation of an intermediate bosonic metallic state in the two-dimensional superconductor-insulator transition at T = 0 , we study an extended Bose-Hubbard model in the limit of a ... -
Zigzag-Shaped Superlattices on the Basis of Graphene Nanoribbons: Structure and Electronic Properties
(Journal article; Peer reviewed, 2016)The paper focuses on superlattices consisting of two coplanar fragments of one-layer graphene nanoribbons that have different width and are connected at an angle. Classification of such superlattices was carried out; their ... -
Zinc-rich coatings for improved corrosion resistance of extruded aluminium heat-exchange tubing in acidified chloride solution
(Doctoral theses at NTNU;2017:294, Doctoral thesis, 2017)Thin walled heat exchanger Al alloy tubes, with solid-solution Zn-rich surface, are widely used by the automotive industry and are considered by the heat, ventilation, air-conditioning and refrigeration market. This work ... -
Zirconia-Supported Catalysts for Oxidation of NO to NO2 in the Production of Nitric Acid
(Master thesis, 2021)Salpetersyre er et viktig kjemisk produkt som hovedsakelig blir brukt til å produsere kunstgjødsel av nitrater. Den industrielle prosessen for framstilling av salpetersyre foregår i tre hovedtrinn, kald Ostwaldprosessen. ... -
Zirconium hydrogen phosphate as an additive in electrocatalytic layers for the oxygen evolution reaction in PEM water electrolysis
(Journal article, 2015)For reasons of electrode integrity and durability it is desirable to add zirconium hydrogen phosphate to electrocatalytic layers in PEM water electrolysis. Common synthesis methods are frequently associated with an ...