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Visar resultat 1 - 5 av 32 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Palladium Catalyzed Methane Oxidation for Emission Control

    Författare :Ida Friberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; water deactivation; methane oxidation; regeneration; Pd beta; Pd Al2O3; Si Al ratio; Ba; sulfur poisoning; Pd SSZ-13;

    Sammanfattning : The use of methane based fuels, such as natural gas and biogas, benefits from lower emissions of CO2, CO, NOx, non-methane HC, SOx and particulate matters compared to traditionally used liquid fossil fuels. However, the exhaust gases contain significant levels of unburnt CH4 residuals, which are desirable to minimize since CH4 is a strong greenhouse gas with high global warming potential. LÄS MER

  3. 2. Ordered arrays of low-dimensional Au and Pd : synthesis and in situ observations

    Författare :Giuseppe Abbondanza; NanoLund: Centre for Nanoscience; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; nanowires NWs ; nanorods; nanoparticles; Au; Pd; Al; Al2O3; anodization; nano-porous anodic aluminum oxide; powder diffraction; x-ray diffraction; x-ray scattering; SAXS; WAXS; grazing-incidence; two-dimensional surface optical reflectance;

    Sammanfattning : Electrodeposition of metals in templates of nano-porous anodic aluminum oxide (NP-AAO) is a versatile way of fabricating ordered arrays of metal nanowires. Thanks to the self-arranged long-range hexagonal order of the pores, electrodeposition in NP-AAO is an easily scalable bottom-up synthesis route and an attractive alternative to traditional top-down fabrication methods such as electron beam lithography. LÄS MER

  4. 3. Using Light to Probe Surface Electrochemical Processes

    Författare :Weronica Linpe; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electrochemistry; X-ray methods; In situ; synchrotron radiation; Ex situ; Single crystal; polycrystalline; aluminium oxide; Au; Pd; Pt; Sn; Super duplex stainless steel.; Fysicumarkivet A:2021:Linpé;

    Sammanfattning : This thesis shows how various light-based in situ techniques can be used to follow different surface electrochemical processes such as electrochemical deposition into Nanoporous Anodic Aluminium Oxide (NP-AAO) templates and the surface structure of electrodes. Techniques based on both x-rays and visible light were used to follow surface structures and compositions, in situ. LÄS MER

  5. 4. On the nature of mixed neurodegenerative amyloidopathies

    Författare :Nadja Gustavsson; NanoLund: Centre for Nanoscience; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicin och hälsovetenskap; Parkinson s disease PD ; Alzheimers disease AD ; Amyloidosis; Alpha synuclein; Amyloid beta;

    Sammanfattning : Alzheimer's disease (AD) and Parkinson's disease (PD) are the most common neurodegenerative diseases in the world. It has been possible to identify common denominators for AD and PD, including aggregation of the amyloid proteins amyloid-beta (Aβ) and alpha-synuclein (α-syn). LÄS MER

  7. 5. Wnt/beta-catenin signaling in midbrain dopaminergic neurons

    Författare :Nina Rawal; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Dopamine; neuron; development; beta-catenin; Writ; Parkin; Parkinson s disease;

    Sammanfattning : Parkinson's disease (PD) is caused by a progressive degeneration of the dopaminergic (DA) neurons of the substantia nigra. However, the mechanisms underlying the degeneration remain elusive and there is no cure for P1) at present. LÄS MER