Sökning: "Gödselmedel"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet Gödselmedel.

  1. 1. Dissertatio academica de argilla ad fertilitatem contribuente, quam, suffrag. ampliss. facult. philosoph. in illustri lyceo Upsaliensi, sub præsidio [...] Johannis Gotsch. Wallerii [...] in auditorio gustaviano d. XVIII. Junii, anni MDCCLX. Horis ante meridiem solitis pro gradu publico bonorum examini modeste committit stipendiarius Regius Paulus Ol. Næsman, Jemtlandus

    Författare :Johan Gottschalk Wallerius; Paul O. Næsman; Johan Gottschalk Wallerius; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Soil amendments; Fertilizers; Gödsling; Gödselmedel; Jordförbättring;

    Sammanfattning : .... LÄS MER

  3. 2. Characterization and treatment of municipal landfill leachates

    Författare :Ulrika Welander; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; physical chemical treatment; biological treatment; characterization; organic substances; leachate treatment; municipal landfill; Biotechnology; Bioteknik;

    Sammanfattning : Abstract The efficiency of different leachate treatment methods for the removal of refractory organic compounds and ammonium-nitrogen was investigated. The methods evaluated were nitrification, denitrification, adsorption onto activated carbon, precipitation by ferric chloride or aluminum sulphate and oxidation by ozone or Fenton´s reagent. LÄS MER

  4. 3. Sorption and transformation of polar pharmaceuticals during wastewater treatment studied by hollow fiber liquid phase microextraction

    Författare :Estelle Larsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pharmaceuticals; wastewater treatment; sludge; hollow fiber liquid phase microextraction;

    Sammanfattning : This thesis addresses the application of hollow fiber liquid phase microextraction as a simple, efficient and environmentally friendly tool to study the fate of four common anti-inflammatory drugs (ketoprofen, naproxen, diclofenac and ibuprofen) during wastewater treatment. Initial experiments verified that this technique is applicable on aqueous as well as suspensions of solid samples, thus greatly simplifying the sample preparation. LÄS MER

  5. 4. Insights to beachcast management on Gotland, Sweden : An Industrial Ecology perspective on waste-resource ambiguity

    Författare :Hanna Nathaniel; Fredrik Gröndahl; Daniel Franzén; Sofia Lingegård; Johanna Spångberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Beachcast; natural resource management; policy; circular bio-economy; agroecosystems; governance; sustainable development; industrial ecology; Släke; naturresursteknik; policy; cirkulär bioekonomi; agroekologiska system; naturresursförvaltning; hållbar utveckling; industriell ekologi i; Industriell ekologi; Industrial Ecology;

    Sammanfattning : Beachcast or beach wrack, washed-up algae and seaweed, used to be a highly sought-after agricultural resource (fertiliser and soil conditioner) in coastal communities around the world before being replaced by chemical fertilisers, but considering the talks of a circular bio-economy – can we reintroduce it? Since the abandonment of beachcast in agriculture, the amount of beachcast has significantly increased as an effect of eutrophication caused by the use of chemical fertiliser, and the material is commonly considered waste. Meanwhile, soils have degraded and need the multiple positive effects on agroecosystems that beachcast could provide. LÄS MER

  7. 5. Mechanistic Studies of Dinuclear Metalloenzymes - A Model Approach

    Författare :Håkan Carlsson; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; models; Enzymes; bioinorganic chemistry; dinuclear; urease; nickel; zinc triphosphoesterase; Oorganisk kemi; Inorganic chemistry;

    Sammanfattning : With the goal to study the mechanisms of dinuclear metalloenzymes, a new line of synthetic and computational models were prepared and studied. Mixed imidazole and carboxylate multidentate complexes were synthesized to better simulate carboxylate-rich ligand environments. LÄS MER