Sökning: "endoglucanases"

Visar resultat 6 - 10 av 12 avhandlingar innehållade ordet endoglucanases.

  1. 6. Hydrolytic and Oxidative Mechanisms Involved in Cellulose Degradation

    Författare :Anu Nutt; Jerry Ståhlberg; Henrik Stålbrand; Uppsala universitet; []
    Nyckelord :Biochemistry; cellobiohydrolase; cellulase; cellulose; cellobiose dehydrogenase; endoglucanase; kinetics; synergism; competitive binding; Biokemi;

    Sammanfattning : The enzymatic degradation of cellulose is an important process in nature. This thesis has focused on the degradation of cellulose by enzymes from two cellulose-degrading fungi, Hypocrea jecorina and Phanerochaete chrysosporium, including both the action of the individual enzymes and their synergistic interplay. LÄS MER

  3. 7. Structure-function studies of GH7 cellulases, key enzymes in the global carbon cycle

    Författare :Topi Haataja; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Enzyme mixtures used for lignocellulosic ethanol production are most commonly derived from filamentous fungi, and enzymes from the glycoside hydrolase family 7 (GH7) constitute the most abundant components in these cocktails. In this thesis I have aimed to increase our understanding of this enzyme family, with focus on the interrelation between their structure and function. LÄS MER

  4. 8. Improvement on cellulose accessibility and reactivity of different wood pulps

    Författare :Viviana Köpcke; Monica Ek; KTH; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; cellulose; accessibility; reactivity; enzymatic treatment; mechanical treatment; chemical treatment; dissolving pulp; paper grade pulps; Wood fibre and forest products; 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

  5. 9. Enhanced Enzymatic Hydrolysis of Lignocellulose in Bioethanol Production Substrate Interactions with Surfactants and Polymers

    Författare :Johan Börjesson; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; enzymologi; Penicillium brasilianum; SSF; Ethanol; Proteins; enzymology; Proteiner; Protease; Adsorption; PEG; Surfactant; Hydrolysis; Lignocellulose; Cellulase; Hypocrea jecorina; Trichoderma reesei; Cellulose;

    Sammanfattning : Ethanol produced from cellulose is a promising future alternative fuel. The production process has three main steps: (i) pretreatment of raw material to increase degradability; (ii) enzymatic hydrolysis of cellulose to produce glucose; (iii) fermentation of glucose into bioethanol. LÄS MER

  7. 10. Investigation of the functionality related characteristics of hydroxypropyl methylcellulose for the release from matrix tablets

    Författare :Anna Viridén; Chalmers tekniska högskola; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; functionality related characteristics; batch-to-batch variation; hydrophilic matrix tablets; hydroxypropyl methylcellulose; polymer characterisation; heterogeneous; drug release;

    Sammanfattning : Hydrophilic matrix tablets are a compressed well mixed composite of drug substance and excipients including a hydrophilic polymer. When the tablet comes in contact with biological fluids, the hydrophilic polymer starts to dissolve, a process that decreases the water penetration through the tablet and involves dimensional changes of the tablet due to swelling of the solvated polymers. LÄS MER