Sökning: "EMF measurements"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden EMF measurements.

  1. 1. Structural and solid state EMF studies of phases in the CaO–K2O–P2O5 system with relevance for biomass combustion

    Författare :Malin Sandström; Dan Boström; Anders Nordin; Bo Björkman; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; calcium potassium phosphates; structural studies; Gibbs standard energy of formation; EMF measurements; biomass; combustion; chemical equilibrium model calculations; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : Fosfaters reaktioner i energiomvandlingsprocesser är kritisk för den generella processen som helhet, för askrelaterade problem, emissioner liksom för en effektiv och hållbar användning av askan.Denna avhandling är en sammanställning och diskussion med utgångspunkt i åtta artiklar som behandlar strukturella och termodynamiska studier på faser i CaO-K2O-P2O5-systemet, vilka är av relevans inom förbränning av biomassa. LÄS MER

  3. 2. Quantitative equilibrium calculations on systems with relevance to copper smelting and converting

    Författare :Bo Björkman; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Assessment of silicate systems; model for liquid silicates; lead silicates; iron silicates; cuprous silicates; quantitative equi¬librium calculations; emf measurements; Gibbs free energy; cup¬rous sulphide; dicalcium ferrite; wüstite-calcia solid solution; copper smelting and converting;

    Sammanfattning : The present thesis gives a summary of results obtained through theoretical and experimental studies of systems with relevance to copper smelting and converting.Many chemical elements are involved in the copper production pro­cesses and a detailed experimental study would be very time- consuming and expensive. LÄS MER

  4. 3. Thermochemical model studies of some high temperature solar energy conversion processes

    Författare :Mats Lundberg; Umeå universitet; []
    Nyckelord :solar energy conversion; cyclic processes; water splitting; hydrogen production; carbothermal reduction; Co-Fe-0 system; phase relations; solid state emf measurements;

    Sammanfattning : This thesis is a summary and discussion of five papers, mainly dealing with processes where solar thermal energy is utilized in the production of chemicals with high energy contents. The products considered in the present work are H2, Al, and Mg. LÄS MER

  5. 4. EMF Exposure and Radiation Performance of Millimeter-Wave Antennas in 5G Mobile Terminals

    Författare :Bo Xu; Sailing He; Oscar Quevedo-Teruel; Akimasa Hirata; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Since 2019, 5G has been rolled out in many countries. To support the demand of increasing traffic capacity, for the first time, the millimeter-wave (mmWave) frequency spectrum is exploited for the mobile wireless telecommunication technologies. LÄS MER

  7. 5. Insights into the Molecular Mechanisms of Litter Decomposition and Assimilation of Nitrogen by Ectomycorrhizal Fungi

    Författare :Firoz Shah; MEMEG; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ectomycorrhizal fungi; Paxillus involutus; organic matter degradation; Fenton chemistry; carbon availability; N assimilation; C and N cycling; protein degradation pathway; secondary metabolites;

    Sammanfattning : Ectomycorrhizae is the dominant type of mycorrhiza found in association with tree roots in boreal and northern temperate forests. In this symbiosis, the fungal partner derives energy from photosynthates provided by the host trees and in return delivers soil-derived nutrients such as nitrogen (N). LÄS MER