Sökning: "populus tremula"

Visar resultat 21 - 25 av 51 avhandlingar innehållade orden populus tremula.

  1. 21. Design and synthesis of xyloglucan oligosaccharides : structure-function studies and application of xyloglucan endotransglycosylase PttXET16A

    Författare :Martin J. Baumann; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; xyloglucan oligosaccharides; xyloglucan endotransglycosylase; XET; crystal structure; fiber surface modification; Populus tremula x Populus tremuloides; Hybrid aspen;

    Sammanfattning : Primary cell walls are a composite of cellulose microfibrilsand hemicelluloses. Xyloglucan is the principal hemicelluloseof primary cell walls of dicotyledons. Xyloglucanendotransglycosylases (XETs) cleave and religate xyloglucanpolymers in plant cell walls. LÄS MER

  3. 22. Xyloglucan-active enzymes : properties, structures and applications

    Författare :Martin J. Baumann; Tuula T. Teeri; Harry Brumer; Vincent Eijsink; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; xyloglucan; xyloglucan endo-transglycosylase hydrolase; xyloglucan endo-hydrolase; xyloglucan endo-transglycosylase; XET; xyloglucan oligosaccharides; synthesis; carbohydrate; cellulose; crystal structure; fiber; surface modification; Populus tremula x Populus tremuloides; Hybrid aspen; nasturtium; NXG; Biochemistry; Biokemi;

    Sammanfattning : Cellulosabaserade material är världens rikligast förekommande förnyelsebara råvara. Växters cellväggar är naturliga kompositmaterial där den kristallina cellulosan är inbäddad i en väv av hemicellulosa, strukturproteiner och lignin. LÄS MER

  4. 23. Structural Studies of a Xyloglucan Endotransglycosylase from Populus tremula x tremuloides and Three Conserved Hypothetical Proteins from Mycobacterium tuberculosis

    Författare :Patrik Johansson; Alwyn Jones; Sherry Mowbray; Pedro Alzari; Uppsala universitet; []
    Nyckelord :Cell and molecular biology; xyloglucan endotransglycosylase; Mycobacterium tuberculosis; epoxide hydrolase; fatty acid metabolism; fatty acid oxidation; crystallography; Cell- och molekylärbiologi;

    Sammanfattning : This thesis describes the structural studies of four different proteins from two organisms. Xyloglucan endotransglycosylases, XETs, are involved in plant cell wall expansion and remodeling by splitting and reconnecting xyloglucan-cellulose crosslinks. The first crystal structure of a XET enzyme has been determined to 1.8 Å. LÄS MER

  5. 24. Molecular Regulation of Bud Phenology and Vegetative Phase Change in Populus Trees

    Författare :Shashank Sane; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Trees are sessile organisms that have evolved to survive and thrive in changing growth conditions. As a survival strategy they undergo massive morphological changes that can be quantified. LÄS MER

  7. 25. Ethylene and Auxin in the Control of Wood Formation

    Författare :Jenny Maria Hellgren; SLU; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; auxin ; ethylene ; lignification ; growth rate ; fibres ; cambium ; gas chromatography ; reaction wood ; organic acids ; mass spectrometry ; populus tremula ; pinus sylvestris; biology; biologi;

    Sammanfattning : This thesis considers aspects of the regulation of growth rate and fibre properties in forest trees. These properties are both genetically determined and influenced by environmental stimuli. Induction of reaction wood is an environmentally induced process involving changes in growth rate and fibre properties that can be readily studied. LÄS MER