Sökning: "manganese"

Visar resultat 16 - 20 av 256 avhandlingar innehållade ordet manganese.

  1. 16. Manganese Combined Oxides as Oxygen Carriers for Chemical-Looping Combustion

    Författare :Malin Hanning; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carbon capture; combined oxide; manganese oxide; chemical-looping;

    Sammanfattning : The global emissions of greenhouse gases are increasing and the development of mitigation measures is becoming more important. One of the alternatives proposed is carbon capture and storage, where the carbon dioxide emitted from large point sources is captured, compressed and stored in underground storage sites. LÄS MER

  3. 17. Environmental Toxins and Essential Trace Elements at Delivery and ADHD

    Författare :Amanda Ode; Avdelningen för arbets- och miljömedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PFCs; manganese; selenium; phthalates; ADHD; fetus;

    Sammanfattning : Perfluorinated compounds (PFCs), phthalates, manganese and selenium are ubiquitous in the environment and humans and influence fetal growth and development. Register and biobank based case-control studies were conducted to investigate the relationship between prenatal exposure to these chemicals and attention deficit hyperactivity disorder (ADHD) in childhood. LÄS MER

  4. 18. Effect of Microstructure on Mechanical Properties of High Strength Steel Weld Metalsn

    Författare :Enda Keehan; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; strength; bainite; carbon; TEM; dilatometry; microstructure; impact toughness; neural network modelling; martensite; manganese; FEGSEM; nickel;

    Sammanfattning : The effects of variations in alloying content on the microstructure and mechanical properties of high strength steel weld metals have been studied. Based on neural network modelling, weld metals were produced using shielded metal arc welding with nickel at 7 or 9 wt. %, manganese at 2 or 0.5 wt. LÄS MER

  5. 19. Quantitative methods for evaluation of tremor and neuromotor function: Application in workers exposed to neurotoxic metals and patients with essential tremor

    Författare :Gunilla Wastensson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Tremor; neuromotor function; neurobehavioral methods; mercury vapor; manganese; previous exposure; welding; essential tremor; deep brain stimulation;

    Sammanfattning : The overall purpose of this thesis was to investigate the usefulness of certain quantitative methods for detecting or quantifying changes in tremor or other neuromotor functions. Tremor and impairment in neuromotor function may be the early signs of adverse effects due to low-level exposure to neurotoxic metals such as mercury and manganese, and are also common features of neurological diseases. LÄS MER

  7. 20. Immunotoxicology in Marine Invertebrates - Effects of Manganese on Immune Response

    Författare :Carolina A. M. Oweson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Invertebrates; Immune system; Haemocytes; Manganese Mn ; Immunotoxicology; Crustacea; Mollusca; Echinodermata;

    Sammanfattning : Manganese, Mn, is an abundant element in nature, particularly in soft bottom sediments of the oceans and in bedrock. The metal is predominantly bound to the sediment in the colloid state, MnO2. LÄS MER