Search for dissertations about: "production losses"

Showing result 16 - 20 of 286 swedish dissertations containing the words production losses.

  2. 16. Stepping into Catalysis : Kinetic and Mechanistic Investigations of Photo- and Electrocatalytic Hydrogen Production with Natural and Synthetic Molecular Catalysts

    Author : Daniel Streich; Leif Hammarström; Reiner Lomoth; Clifford Kubiak; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Artificial photosynthesis; photocatalysis; electrocatalysis; hydrogen production; proton reduction; hydrogenase; iron complex; active site model; catalytic mechanism; transient absorption; spectroscopy; electrochemistry; cyclic voltammetry; Kemi med inriktning mot kemisk fysik; Chemistry with specialization in Chemical Physics;

    Abstract : In light of its rapidly growing energy demand, human society has an urgent need to become much more strongly reliant on renewable and sustainable energy carriers. Molecular hydrogen made from water with solar energy could provide an ideal case. READ MORE

  4. 17. Post-Harvest Losses, Intimate Partner Violence and Food Security in Tanzania

    Author : Martin Julius Chegere; Göteborgs universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; post-harvest losses; intimate partner violence; hermetic bags; training; post-harvest handling pratices; randomised controlled trial; cost-benefit analysis;

    Abstract : High levels of food losses occurring after harvesting offset the effort to increase food production. This situation increases the risk of food insecurity and low incomes among smallholder farmers. READ MORE

  5. 18. Nitrogen Losses from a Clay-rich Soil used for Cereal Production in south-western Sweden

    Author : Magdalena Wallmann; Göteborgs universitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; nitrogen; fertilisers; soil; nitrous oxide; nitrogen leaching; 15N; nitrogen use efficiency; nitrogen budget; agriculture; Sweden;

    Abstract : Addition of fertiliser nitrogen (N) in crop production increases yields and protein contents, but all is not taken up by the crop. Instead, some of the N is lost to air and waters, contributing e.g. to climate change, stratospheric ozone depletion, eutrophication and acidification. READ MORE

  6. 19. Energy system evaluation of thermo-chemical biofuel production : Process development by integration of power cycles and sustainable electricity

    Author : Martin Bojler Görling; Mats Westermark; Jörgen Held; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass; Gasification; Methane; SNG; Power to Gas; Pyrolysis;

    Abstract : Fossil fuels dominate the world energy supply today and the transport sector is no exception. Renewable alternatives must therefore be introduced to replace fossil fuels and their emissions, without sacrificing our standard of living. READ MORE

  7. 20. Studies of Voltage Losses in Organic Solar Cells

    Author : Deping Qian; Fengling Zhang; Feng Gao; Olle Inganäs; Natalie Stingelin; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Organic photovoltaic (OPV) devices based on semiconducting polymers and small molecules are potential alternatives to inorganic solar cells, owing to their advantages of being inexpensive, lightweight, flexible and suitable for roll-to-roll production. The state of art organic solar cells (OSCs) performed power conversion efficiencies (PCEs) over 13%. READ MORE