Sökning: "kalium"

Visar resultat 6 - 10 av 31 avhandlingar innehållade ordet kalium.

  1. 6. Nutrient imbalance in Norway spruce

    Författare :Gunnar Thelin; Avdelningen för kemiteknik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Silviculture; Växtekologi; Plant ecology; nitrogen saturation; base saturation; pH; multiple limitation; deficiency; copper; boron; potassium; pollution; sustainability; conifers; forestry; forestry technology; Skogsvetenskap; skogsbruk; skogsteknik; Soil Science; agricultural hydrology; Lantbrukshydrologi; marklära;

    Sammanfattning : The studies presented in my thesis indicate that growing Norway spruce in monoculture does not constitute sustainable forest management in a high N and S deposition environment, such as in southern Sweden. The combination of N-induced high growth rates and leaching due to soil acidification causes soil reserves of nutrients to decrease. LÄS MER

  3. 7. Primary Aldosteronism Screening and Diagnosis in Primary Health Care

    Författare :Christina Westerdahl; Lund Kirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; hypertension; primary health care; aldosterone; primary aldosteronism; fludrocortisone; aldosterone to renin ratio; renin; captopril;

    Sammanfattning : Arterial hypertension is a very common disorder. In most cases the cause is unknown and therefore classified as essential or primary hypertension. Primary aldosteronism (PA), characterized by an inappropriate aldosterone secretion, has traditionally been estimated to account for approximately 1 % of all hypertensive cases. LÄS MER

  4. 8. Gasification of biochars: Evolution of pore structure, effects of alkalis and alkali release

    Författare :Saiman Ding; Klas Engvall; Efthymios Kantarelis; Jukka Konttinen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gasification; alkali release; kinetic modelling; char reactivity; pore structure; alkalis effects; förgasning; frigörande av alkalier; kinetisk modellering; kolreaktivitet; porstruktur; alkalieffekter; Chemical Engineering; Kemiteknik;

    Sammanfattning : Renewable energy sources are indispensable to meet the rising demand of energy usage  while  reducing  the  negative  environmental  impact  of utilising fossil  fuels. Gasification  is  an  efficient  technology  to  convert  biogenic waste  into  valuable gaseous products. LÄS MER

  5. 9. The Vertical Distribution of Roots, Mycorrhizal Mycelia and Nutrient Acquisition in Mature Forest Trees

    Författare :Hans Göransson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant ecology; Växtekologi; isotopes; Root bioassay; Mixed stands; Picea abies; Fagus sylvatica; Nutrient uptake; Quercus robur; PLFA; Root distribution; Ectomycorrhiza;

    Sammanfattning : The vertical distribution of the nutrient uptake of Norway spruce (Picea abies (L.) Karst.), European beech (Fagus sylvatica L.) and pedunculate oak (Quercus robur L. LÄS MER

  7. 10. Activity concentrations of radionuclides in energy production from peat, wood chips and straw

    Författare :Robert Hedvall; Kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Radionuclides; peat; wood; chips; straw; bioenergy; biomass; district heating; emission; Cs; Physics; Chernobyl; Radioactivity; Fysik; Technological sciences; Teknik; Fysicumarkivet A:1997:Hedvall;

    Sammanfattning : In this thesis quantitative analyses of radionuclide concentrations in bioenergy fuels such as peat, wood chips and straw are presented. For comparison a brief description is included of radionuclide concentrations and radiation doses from other sources of power and also from some industrial applications. LÄS MER