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Visar resultat 6 - 10 av 879 avhandlingar som matchar ovanstående sökkriterier.

  1. 6. Characterization, Activation and Reactivity of Natural Pozzolans for Use as Supplementary Cementitious Materials

    Författare :Amrita Hazarika; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reactivity; Volcanic Materials.; Clays; Pozzolans; Activation; SCMs;

    Sammanfattning : Supplementary cementitious materials (SCMs) represent one of the most practicable ways to reduce the negative environmental impact of cement. Natural pozzolans like clays and volcanic materials (VMs) offer promising alternatives to industrial by-products such as blast furnace slags and fly ashes, whose availability cannot meet the growing demand for SCMs globally. LÄS MER

  3. 7. Catalytic Processes Mediated by Metal−Organic Frameworks : Reactivity and Mechanistic Studies

    Författare :Vlad Pascanu; Belén Martín-Matute; Seth Cohen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organisk kemi; Organic Chemistry;

    Sammanfattning : The present thesis describes the development of heterogeneous catalytic methodologies using metal−organic frameworks (MOFs) as porous matrices for supporting transition metal catalysts. A wide spectrum of chemical reactions is covered. LÄS MER

  4. 8. Lignin polysaccharide networks in softwood and chemical pulps : characterisation, structure and reactivity

    Författare :Martin Lawoko; Göran Gellerstedt; Gösta Brunow; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : The chemical interactions between the main wood components i.e., cellulose, hemicelluloses and lignin are of fundamental importance for understanding the chemical aspects of wood formation and its reactivity during fibre processing e.g during chemical pulping of wood. LÄS MER

  5. 9. Dissolved organic matter in lakes : Chemical diversity and continuum of reactivity

    Författare :Alina Mostovaya; Lars Tranvik; Colin Stedmon; Uppsala universitet; []
    Nyckelord :dissolved organic matter; DOM; dissolved organic carbon; DOC; PARAFAC; reactivity continuum model; ultrahigh resolution mass spectrometry; FT-ICR-MS; organic matter characterization; decomposition kinetics; baseline metabolism; Biologi med inriktning mot limnologi; Biology with specialization in Limnology;

    Sammanfattning : Dissolved organic matter (DOM) is the largest pool of organic carbon in aquatic systems and an important component of the global carbon cycle. Large amounts of DOM are decomposed within lakes, resulting in fluxes of CO2 and CH4 to the atmosphere. LÄS MER

  7. 10. Platelet reactivity and comorbidities in acute coronary syndrome

    Författare :Fredrik Björklund; Thomas Mooe; David Erlinge; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; acute coronary syndrome; myocardial infarction; platelet reactivity; platelet aggregation; Inflammation; infection; diabetes mellitus; chronic kidney disease; acute kidney injury; Cardiology; kardiologi;

    Sammanfattning : Background In the event of an acute coronary syndrome (ACS), the risk of death and complications such as stroke and re-infarction is high during the first month. Diabetes, impaired kidney function, elevated markers of systemic inflammation and high level of platelet reactivity have all been associated with worsened prognosis in ACS patients. LÄS MER