Search for dissertations about: "decay resistance"

Showing result 1 - 5 of 28 swedish dissertations containing the words decay resistance.

  1. 1. Functional Traits in Sphagnum

    Author : Fia Bengtsson; [2019-02-21]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; peat mosses; functional traits; NPP; decay resistance; N2 fixation; destination resistance; climate;

    Abstract : Peat mosses (Sphagnum) are ecosystem engineers that largely govern carbon sequestration in northern hemisphere peatlands. I investigated functional traits in Sphagnum species and addressed the questions: (I) Are growth, photosynthesis and decomposition and the trade-offs between these traits related to habitat or phylogeny?, (II) Which are the determinants of decomposition and are there trade-offs between metabolites that affect decomposition?, (III) How do macro-climate and local environment determine growth in Sphagnum across the Holarctic?, (IV) How does N2 fixation vary among different species and habitats?, (V) How do species from different microtopographic niches avoid or tolerate desiccation, and are leaf and structural traits adaptations to growth high above the water table?Photosynthetic rate and decomposition in laboratory conditions (innate growth and decay resistance) were related to growth and decomposition in their natural habitats. READ MORE

  2. 2. Functional Traits in Sphagnum

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Fia Bengtsson; Håkan Rydin; Gustaf Granath; Cronberg Nils; Sari Juutinen; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; peat mosses; functional traits; NPP; decay resistance; N2 fixation; desiccation resistance; climate; Biology with specialization in Ecological Botany; Biologi med inriktning mot ekologisk botanik;

    Abstract : Peat mosses (Sphagnum) are ecosystem engineers that largely govern carbon sequestration in northern hemisphere peatlands. I investigated functional traits in Sphagnum species and addressed the questions: (I) Are growth, photosynthesis and decomposition and the trade-offs between these traits related to habitat or phylogeny?, (II) Which are the determinants of decomposition and are there trade-offs between metabolites that affect decomposition?, (III) How do macro-climate and local environment determine growth in Sphagnum across the Holarctic?, (IV) How does N2 fixation vary among different species and habitats?, (V) How do species from different microtopographic niches avoid or tolerate desiccation, and are leaf and structural traits adaptations to growth high above the water table?Photosynthetic rate and decomposition in laboratory conditions (innate growth and decay resistance) were related to growth and decomposition in their natural habitats. READ MORE

  3. 3. High-Performance Composites from Modified Wood Fiber

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Mats Westin; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kraft lignin; fiberboard; lignocellulosic fiber; durability; wood fiber; mechanical properties; dimensional stability; decay resistance; acetylation; composite;

    Abstract : The objective of this work was to produce and evaluate high-performance wood fiber composites. High-performance was defined as: high dimensional stability and a high durability, including resistance to wood-decaying organisms (fungi, bacteria, and insects). READ MORE

  4. 4. Wood Plastic Composites made from Modified Wood Aspects on Moisture Sorption, Micromorphology and Durability

    University dissertation from Stockholm : KTH

    Author : Kristoffer Segerholm; Ove Söderström; Magnus Wålinder; Mats Westin; Pia Larsson Brelid; Per Johan Gustafsson; [2007]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Wood plastic composites; WPC; acetylation; heat treatment; furfurylation; moisture sorption; micromorphology; decay; UV laser; soil test; MEDICINE Morphology; cell biology; pathology Morphology Biomaterials; MEDICIN Morfologi; cellbiologi; patologi Morfologi Biomaterial;

    Abstract : Wood plastic composite (WPC) materials have seen a continuous market growth worldwide in the last decade. So-called extruded WPC profiles are today mainly used in outdoor applications, e.g. decking, railing and fencing. READ MORE

  5. 5. Studies of drug resistance in minor HIV quasispecies

    University dissertation from Stockholm : Karolinska Institutet, Dept of Laboratory Medicine

    Author : Halime Ekici; Karolinska Institutet.; Karolinska Institutet.; [2014]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : The main objective was to study drug resistance mutations (DRM) in the HIV-1 reverse transcriptase (RT) gene of minor HIV-1 quasispecies, not detectable with standard techniques. Sensitive allele-specific PCR (AS- PCR) and next-generation sequencing (NGS) were developed to study resistance to drugs of relevance in low- and middle-income countries (LMIC); the nucleoside analogue RT inhibitor (NRTI) lamivudine (3TC) and the non-nucleoside RT inhibitors (NNRTIs) efavirenz (EFV) and nevirapine (NVP). READ MORE