Sökning: "nitrogen iron"
Visar resultat 21 - 25 av 78 avhandlingar innehållade orden nitrogen iron.
Sammanfattning : AbstractThe most important factor affecting global warming is the increased concentrations of greenhouse gases in the atmosphere. Carbon dioxide is considered as the most important anthropogenic greenhouse gas. LÄS MER
22. Screening of oxygen-carrier particles based on iron-, manganese-, copper- and nickel oxides for use in chemical-looping technologies
Sammanfattning : Capture and storage of carbon dioxide from combustion will likely be used in the future as a method of reducing emissions of greenhouse gases and thus be part of the overall strategy to stabilize the atmospheric levels of CO2. Chemical-looping combustion is a method of combustion where CO2 is inherently separated from the non-condensable components in the flue gas without the need for an energy intensive air separation unit. LÄS MER
- Detta är en avhandling från Luleå : Luleå tekniska universitet
Sammanfattning : The aim of this thesis work was to develop new methodologies to characterize iron ore green pellets, in wet and dry state. The new characterization methods applied and developed in this work were mainly based on scanning electron microscopy (SEM) to gather both qualitative and quantitative data on different components of the pellets, i.e. LÄS MER
24. X-ray studies on the binary systems of iron with nitrogen, phosphorus, arsenic, antimony and bismuthDetta är en avhandling från Uppsala : Almqvist & Wiksell
Sammanfattning : .... LÄS MER
25. Towards an understanding of diazocyte development and diazotrophy in the marine cyanobacterium TrichodesmiumDetta är en avhandling från Stockholm : Department of Botany, Stockholm University
Sammanfattning : Trichodesmium is a filamentous cyanobacterium of great ecological significance as it contributes significantly to primary production in oceans through an efficient nitrogen fixation strategy, including a unique cell type, the diazocyte. The aim of this thesis was to generate a deeper understanding of the structural and molecular background related to the development of diazocytes and the maintenance of diazotrophy in Trichodesmium erythraeum IMS101. LÄS MER