Sökning: "DRIFTS"

Visar resultat 1 - 5 av 36 avhandlingar innehållade ordet DRIFTS.

  1. 1. In Search of Scientific Methods for Conservation of Historic Silk Costumes

    Detta är en avhandling från Göteborg : Acta Universitatis Gothoburgensis

    Författare :Johanna Nilsson; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HUMANIORA; HUMANITIES; silk; artificial ageing; Queen Christina; historic costumes; conservation; ATR-FTIR; SEC; DRIFTS; tensile tests;

    Sammanfattning : The general aim of this dissertation is to lay ground for the evaluation of conservation methods for historic costumes. The Royal Armoury, Stockholm has a large number of 17th century men’s garments, many of them made of silk and in need of conservation. LÄS MER

  2. 2. Orthoptic Findings and Visual Fixation in children in general and in children with surgically treated hydrocephalus

    Detta är en avhandling från Göteborg : Acta Universitatis Gothoburgensis

    Författare :Eva Aring; Göteborgs universitet.; Gothenburg University.; [2007]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Strabismus; abnormal head posture; drifts; intrusive saccades; meningomyelocele;

    Sammanfattning : Background: The ocular motor system is complex and dependent on the cooperation of many different areas of the brain. Ocular motor functions may be disturbed by various factors resulting in strabismus, and abnormal fixational behaviour, which may interfere on a multitude of visual functions. LÄS MER

  3. 3. Ring-opening catalysts for cetane improvement of diesel fuels

    Detta är en avhandling från Stockholm : KTH

    Författare :Ulf Nylén; KTH.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ring opening selective ; naphthenic structure; indan; light cycle oil LCO ; cetane; Pt-Ir catalyst; microemulsion; XPS; TPR; TEM; DRIFTS; sulphur analysis; GC-SCD; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik;

    Sammanfattning : The global oil refining industry with its present product distribution essentially shifted towards fuels such as gasoline and diesel will most likely hold the fort for considerable time. However, conditions are changing and refinery survival will very much depend on long-term planning, process and product flexibility and being at the frontiers of refining technology, a technology where catalysts play leading roles. LÄS MER

  4. 4. Reactions on nanostructured and microporous surfaces

    Detta är en avhandling från Stockholm : KTH

    Författare :Anna Clemens; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Cu-CHA; XRD; solid-state ion-exchange; materials characterisation; electron microscopy; NH3-SCR; zeolites; catalysis; nanostructured graphite; Water ice; DRIFTS; XPS; NOx reduction; Cu-SSZ-13; temperature programmed desorption; ultra-high vacuum; intercalation; UV-Vis spectroscopy;

    Sammanfattning : Interactions between surfaces and molecules play a central role in various fields where catalysis is one example. In order to understand different surface processes, physicochemical characterisation of the surface materials and molecules is required. LÄS MER

  5. 5. Lean NOx reduction over silver-alumina catalysts - Aspects on synthesis, structure and activity

    Detta är en avhandling från Stockholm : KTH

    Författare :Hannes Kannisto; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; freeze-drying; HC-SCR; DRIFTS.; aromatic hydrocarbons; silver-alumina; Lean NOx reduction; selective catalytic reduction; sol-gel; characterization; catalyst preparation; kinetic modeling;

    Sammanfattning : The aim of this thesis is to increase the understanding of how to design highly active silver-alumina catalysts for selective catalytic reduction of NOx with hydrocarbons (HC-SCR) in oxygen excess at low temperatures (150-250 °C). Silver-alumina catalysts have been prepared using different methods, including a new unique preparation method developed during the thesis project. LÄS MER