Sökning: "utvinning"

Visar resultat 16 - 20 av 22 avhandlingar innehållade ordet utvinning.

  1. 16. Evolution of Yeast Respiro-Fermentative Lifestyle and the Underlying Mechanisms Behind Aerobic Fermentation

    Författare :Arne Hagman; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Crabtree effect; aerobic fermentation; respiro-fermentation; ethanol production; yeast; central carbon metabolism; evolution of alternative lifestyles;

    Sammanfattning : Under aerobic conditions, most yeasts such as Kluyveromyces lactis, prefer the respiratory pathway and some, such as Saccharomyces cerevisiae prefer less energy efficient fermentative pathway for their energy metabolism. These two metabolic strategies are also known as Crabtree negative and Crabtree positive respectively, and the evolution of the latter has lately been explained by the “make-accumulate-consume” life strategy. LÄS MER

  3. 17. Exploring cellulose as a biomacromolecule for enhanced battery metal ion recovery/recycling

    Författare :Billy W. Hoogendoorn; Richard Olsson; Yuanyuan Li; Mikael S. Hedenqvist; Aji Mathew; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Biomacromolecules; Nanocellulose; metal oxide nanoparticle synthesis; electrodeposition; battery recycling; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : The research focused on the effects of integrating nanocellulose in the solidification of metal ions into metal oxide particles or metallic electrodeposits.  Firstly, the cellulose was isolated as highly crystalline ca. 15-25 nm thick and 500 nm long fibers from bacterial cellulose using acid hydrolysis and had a negative surface charge. LÄS MER

  4. 18. Energy and material recovery from high-ash waste through pyrolysis

    Författare :Katarzyna Jagodzińska; Weihong Yang; Pär Jönsson; Tobias Richards; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pyrolysis; torrefaction; landfill waste; shredder fines; hydrogen production; carbon nanotubes; circular economy; pyrolys; torrefiering; avfall från deponier; finfraktioner från fragmentering; vätgasproduktion; kolbaserade nanorör; cirkulär ekonomi; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Undoubtedly, the past practices of profit maximisation by all means, which fuelled swift industrialisation and urbanisation, left behind a legacy of non-sanitary old landfills polluting the environment. These, together with active landfills supplied with tremendous streams of waste produced annually, are a loose cannon calling for action. LÄS MER

  5. 19. Why don’t we mine the landfills?

    Författare :Nils Johansson; Joakim Krook; Mats Eklund; Peter Tom Jones; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : There are many reasons to mine landfills. For example, metals are increasingly shifting location from the Earth’s crust through human society into landfills. LÄS MER

  7. 20. Digestion and Absorption of Sphingomyelin from Milk

    Författare :Lena Nyberg; Lund Medicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Gastro-enterology; intestine; sphingolipid; ceramidase; sphingomyelinase; ceramide; Gastroenterologi;

    Sammanfattning : Sphingomyelin (SM) is a major component of mammalian cell membranes. Due to its widespread occurrence it is a dietary component, occurring mainly in milk, eggs, meat and fish. In the cell membrane SM was earlier considered to be only a structural element, which interacts with cholesterol and forms a system for bilayer stabilization. LÄS MER