Search for dissertations about: "svavel"

Showing result 16 - 20 of 40 swedish dissertations containing the word svavel.

  2. 16. DYNAMIC MODELLING OF BIOGEOCHEMICAL PROCESSES IN FOREST ECOSYSTEMS

    Author : Salim Belyazid; Avdelningen för kemiteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Naturvetenskap; marklära; Silviculture; forestry; forestry technology; Skogsvetenskap; skogsbruk; skogsteknik; Natural science; Lantbrukshydrologi; Soil Science; agricultural hydrology; Växtekologi; Forest Soil Acidification; Plant ecology; Plant biochemistry; Forest Growth; Vegetation biodiversity; Carbon Sequestration; Nitrogen Leaching; Miljökemi; Dynamic Modelling; Växtbiokemi; Environmental chemistry;

    Abstract : Forests in Sweden are undergoing rapid and considerable changes regarding both management methods and environmental conditions. To understand the effects of these changes and to be able to predict impending changes in forest ecosystems, a holistic understanding of the processes governing the ecosystem is needed. READ MORE

  4. 17. Chemical and Morphological Characterisation of Aerosol Particles in the Tropopause Region

    Author : Hung Nguyen Ngoc; Kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; CARIBIC; Physics; Singel particle analysis TEM and EFTEM; Carbon and Sulphur; Light element analysis; Aerosol sampler; Chemical Characterisation; Aerosol in the Tropopause Region; Nuclear physics; Technological sciences; Fysik; Teknik; Kärnfysik; Fysicumarkivet A:000;

    Abstract : The aim of this work was to study atmospheric aerosols, focusing on the chemical composition, the morphology and the origin of the aerosol in the upper troposphere and lowermost stratosphere. An aerosol sampler was developed for this purpose. A new method for quantitative analysis of the major components of the aerosol, i.e. READ MORE

  5. 18. Effects of forest fire smoke and volcanism on the stratospheric aerosol

    Author : Oscar Sandvik; Kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fjärranalys; Stratosfärsaerosol; Skogsbrandsrök; Vulkanism; CALIOP; FLEXPART; CALIPSO; AIRS; IAGOS-CARIBIC; Remote Sensing; Stratospheric aerosol; Forest fire smoke; Volcanism; CALIOP; FLEXPART; CALIPSO; AIRS; IAGOS-CARIBIC; Fysicumarkivet A:2021:Sandvik;

    Abstract : This thesis explores the stratospheric aerosol through both in-situ measurements and remote sensing. The background stratospheric aerosol is complex and is perturbed by injections of forest fire smoke particles and by particles formed from volcanic SO2. READ MORE

  6. 19. Brownification of freshwaters - the role of dissolved organic matter and iron

    Author : Sara Ekström; Enhet akvatisk ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Brownification; freshwater; water color; dissolved organic matter DOM ; iron Fe ; decreasing acidification; climate change;

    Abstract : The term brownification refers to the trend of increasing water color, i.e. the water becoming browner, which has been observed throughout the northern hemisphere over the last decades. Brownification has both ecological and societal implications. READ MORE

  7. 20. Aspects of optimizing pulp fibre properties for tissue and packaging materials

    Author : Hafizur Rahman; Armando Cordova; Per Engstrand; Börje Norlin; Göran Bengtsson; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : To improve the competitive advantages of pulp fibre-based materials for tissue and packaging over fossil-based products, it is essential to increase knowledge of the selectivity of the cooking and the chemimechanical processes by optimizing the unit operations of impregnation, cooking and refining. A general goal in pulping processes is to achieve as efficient and even fibre separation as possible. READ MORE