Sökning: "standard reference material"

Visar resultat 1 - 5 av 38 avhandlingar innehållade orden standard reference material.

  1. 1. Modelling and Characterisation of the Martensite Formation in Low Alloyed Carbon Steels

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Jessica Gyhlesten Back; Luleå tekniska universitet.; Högskolan Dalarna.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik; Dilatometry; Hardness; EBSD; Martensite; Austenite; Kurdjumov-Sachs; Phase transformation; Modelling; Steel Forming and Surface Engineering; Stålformning och ytteknik;

    Sammanfattning : The current work contains experimental and theoretical work about the formation of martensite from the austenitic state of the steel Hardox 450. Simulation of rolling and subsequent quenching of martensitic steel plates requires a model that can account for previous deformation, current stresses and the temperature history, therefore dilatometry experiments were performed, with and without deformation. LÄS MER

  2. 2. Methods for Determination of Benzo(a)pyrene and High Molecular Weight (>300 Da) Polycyclic Aromatic Hydrocarbons in Particulate Matter from Ambient Air and Vehicle Exhausts

    Detta är en avhandling från Stockholm : Department of Analytical Chemistry, Stockholm

    Författare :Christoffer Bergvall; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PAH; dibenzopyrene; benzo a pyrene; standard reference material; air particulate matter; diesel particulate matter; toxic equivalence factor; ultrasonic assisted extraction; accelerated solvent extraction; automation; online coupling; GC MC; LC GC MS; NATURAL SCIENCES Chemistry Analytical chemistry; NATURVETENSKAP Kemi Analytisk kemi; analytisk kemi; Analytical Chemistry;

    Sammanfattning : Air pollution with particulate matter (PM) raises considerable concern because of its adverse effects on human health. For this reason, and because the mechanisms of PM toxicity are not fully known, there is an urgent need to determine the chemical constituents of atmospheric PM, especially PM emanating from traffic - a major source of urban PM. LÄS MER

  3. 3. Influences of alumina on fayalite-type slags properties an experimental study on leaching and melting behaviours

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Sina Mostaghel; Luleå tekniska universitet.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Sammanfattning : Recycling of secondary raw materials by non-ferrous metal producers is steadily increasing. These materials inevitably introduce various impurities to the production furnaces, which can change the chemical composition, and thereafter, the physical and chemical properties of the products and by-products. LÄS MER

  4. 4. Silicon Nanoribbon FET Sensors Fabrication, Surface Modification and Microfluidic Integration

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Roodabeh Afrasiabi; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : Over the past decade, the field of medical diagnostics has seen an incredible amount of research towards the integration of one-dimensional nanostructures such as carbon nanotubes, metallic and semiconducting nanowires and nanoribbons for a variety of bio-applications. Among the mentioned one-dimensional structures, silicon nanoribbon (SiNR) field-effect transistors (FET) as electro-chemical nanosensors hold particular promise for label-free, real-time and sensitive detection of biomolecules using affinity-based detection. LÄS MER

  5. 5. To be in‐between The road to disability pension with reference to the Swedish social insurance system

    Detta är en avhandling från Institutionen för hälsa och samhälle

    Författare :Berit Ydreborg; Linköpings universitet.; Linköpings universitet.; [2005]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Disability pension; social insurance; social insurance officers; clients; practice; work ability; street‐level bureaucracy; INTERDISCIPLINARY RESEARCH AREAS Health and medical services in society; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN Hälso- och sjukvård i samhället;

    Sammanfattning : Background: The Social Insurance is part of the Swedish welfare system that is intended to create economic security for citizens in the event of unemployment, sickness, functional disability, and old age. The Swedish sickness‐benefit insurance is based on the standard insurance principle meaning that sickness benefits are related to level of lost income. LÄS MER