Sökning: "reactivity"

Visar resultat 1 - 5 av 734 avhandlingar innehållade ordet reactivity.

  1. 1. Reactivity of Transition-Metal Compounds from Electronic Structure

    Författare :Aleksandra Vojvodic; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; magnetic edge states; electronic structure; density-functional theory; growth; surface states and resonances; nitrides; density of states; hydrodesulphurisation; sulphides; steam reforming; transition-metal carbides; Bronsted-Evans Polanyi relation; scaling relations; adsorption; descriptor; reactivity; catalysis;

    Sammanfattning : Transition-metal carbides (TMC's), nitrides, and sulfides belong to the class of materials known as transition-metal compounds (TMX's). Besides having intriguing properties, these materials are relevant for, e.g., growth and catalysis. LÄS MER

  2. 2. Dissolving pulp Multivariate Characterisation and Analysis of Reactivity and Spectroscopic Properties

    Detta är en avhandling från Umeå : Kemi

    Författare :Kristina Elg Christoffersson; Umeå universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Dissolving pulp; reactivity; solid state 13C NMR spectroscopy; NIR spectroscopy; multivariate analysis; cellulose; viscose; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Sammanfattning : Various chemical properties can be used to characterise dissolving pulp. The quality of the pulp must be carefully controlled to ensure that it meets the requirements for its intended use and the further processes to be applied. LÄS MER

  3. 3. Improvement on cellulose accessibility and reactivity of different wood pulps

    Detta är en avhandling från Stockholm : KTH

    Författare :Viviana Köpcke; KTH.; [2008]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; cellulose; accessibility; reactivity; enzymatic treatment; mechanical treatment; chemical treatment; dissolving pulp; paper grade pulps; FORESTRY; AGRICULTURAL SCIENCES and LANDSCAPE PLANNING Product science Wood fibre and forest products; SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING Produktforskning Träfiber- och virkeslära;

    Sammanfattning : Cellulosans tillgänglighet och reaktivitet är nyckelparametrar vid framställning av regenererad cellulosa och cellulosaderivat. Det är välkänt att på grund av cellulosans kristallina struktur är tillgängligheten begränsad för lösningsmedel och olika reagens. LÄS MER

  4. 4. Sesquiterpenoid unsaturated dialdehydes - Structural properties that affect reactivity and bioactivity

    Detta är en avhandling från Department of Organic Chemistry, Lund University

    Författare :Mikael Jonassohn; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mutagenic; autoxidation; dopamine D1 receptor; vanilloid receptor; structure-activity relationships; triacetic acid lactone; amino acids; reactivity; merulidial; warburganal; polygodial; Unsaturated dialdehydes; isovelleral; antimicrobial; cytotoxic; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : The natural unsaturated 1,4-dialdehydes warburganal (6), polygodial (14), isovelleral (55) and merulidial (56a) and their corresponding unconjugated aldehyde isomers (121), (15), (108) and (109a) were prepared, and their bioactivity and reactivity towards various nucleophiles were investigated. New synthetic routes to prepare (-)-6 and its isomer (+)-121 from (-)-14, and (+)-109a from (-)-56a, have been developed. LÄS MER

  5. 5. Autonomic reactivity in muscle pain clinical and experimental assessment

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Nebojsa Kalezic; Högskolan i Gävle.; Umeå universitet.; [2006]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICINE Physiology and pharmacology Physiology; MEDICIN Fysiologi och farmakologi Fysiologi; autonomic reactivity; stress; chronic pain; experimental pain; back; shoulder; neck; ODONTOLOGY Physiology; ODONTOLOGI Fysiologi;

    Sammanfattning : There are numerous indications of possible involvement of the autonomic nervous system in the genesis of chronic pain. The possibility exists that sympathetic activation is related to motor dysfunction and changes in sensory processing, which have otherwise been implicated in musculoskeletal disorders. LÄS MER