Sökning: "Gunnar Jonsson"

Visar resultat 21 - 25 av 31 avhandlingar innehållade orden Gunnar Jonsson.

1. 21. Old-Growth Forests in the High Coast Region in Sweden and Active Management in Forest Set-Asides

   Författare :Jennie Sandström; Bengt-Gunnar Jonsson; Mattias Edman; Mikael Ohlson; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coarse woody debris; Dead wood; Dendrochronology; Fire history; Forest conservation; Forest structure; Log; Meta-analysis; Pine heath forest; Prescribed burning; Saproxylic fungi; Saproxylic beetles; Snag; Wood-inhabiting fungi; Aktiv skötselmetod; Bevarandebiologi; Brandhistorik; Dendrokronologi; Död ved; Hällmarkstallskog; Lågproduktiv skog; Meta-analys; Naturvård; Naturvårdsbrand; Skogsstruktur; Solbelyst död ved; Stock; Torraka; Vedlevande svamp; Vedlevande insekter; Åldersstruktur;

   Sammanfattning : In today´s intensively managed landscape, very few forests with old-growth characteristics and little human impact exist. One of the rare exceptions is pine forests on rocky soils, a forest type which has probably escaped extensive human use because of its low productivity. LÄS MER

3. 22. An evaluation of regional sustainability by analysing energy and carbon flows – A study of Jämtland, Sweden

   Författare :Torbjörn Skytt; Bengt-Gunnar Jonsson; Fredrik Ståhl; Magdalena Svanström; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Regional sustainability; Energy flows; Exergy; Carbon GHG fluxes; Sustainability indicators; carbon dioxide emissions; methane emissions; nature emissions;

   Sammanfattning : Models showing the anthropogenic and natural flows of two sustainability indicators; carbon based GHG and energy (as work energy) have been made for the Swedish region Jämtland. The methodology used was inspired by the study sustainability analysis conducted on the small Danish island Samsø using the above two indicators. LÄS MER

4. 23. Fossil Free or Not - That is the Question

   Författare :Torbjörn Skytt; Bengt-Gunnar Jonsson; Monica Odlare; Markku Rummukainen; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fossil free; Carbon balance; Carbon flow; Energy flow; Climate mitigation; Governing climate change; Forest carbon;

   Sammanfattning : This is an evaluation of Jämtland County’s ability to achieve its climate targets to reduce greenhouse gas (GHG) emissions with 10% annually, and to become fossil fuel free 2030. There is a risk that the target to become fossil fuel-free, relying primarily on outtake of forest biomass, contradicts with the target in the UN Paris Agreement to keep the global temperature increase below 1. LÄS MER

5. 24. On diet in ankylosing spondylitis

   Författare :Björn Sundström; Solveig Wållberg-Jonsson; Gunnar Johansson; Margaretha Haugen; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; diet; ankylosing spondylitits; omega-3; cardiovascular; reumatologi; rheumatology;

   Sammanfattning : The aim of this thesis was to examine the role of diet in ankylosing spondylitis (AS). Patients were examined in: i) a postal questionnaire survey of dietary habits and gastrointestinal (GI) symptoms; ii) a study on biomarkers of diet and disease activity; iii) a comparison of cardiovascular risk factors with the general population using data from the Västerbotten Intervention Programme (VIP), and; iv) a 21-week omega-3 fatty acid supplementation study regarding the effects on disease activity. LÄS MER

7. 25. Nanocomposites made from nanoporous cellulose fibre

   Författare :Anna Svensson; Lars Wågberg; Eva Malmström Jonsson; Gunnar Westman; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis explores how to use the dry nanoporous structure of cellulosic fibres in new types of composite materials. A large effort was also given on how to correctly characterize the structure of fibres where the wet structure has been preserved also in the dry state. LÄS MER