Sökning: "methane formation"

Visar resultat 1 - 5 av 78 avhandlingar innehållade orden methane formation.

  1. 1. Abiotic and biotic methane dynamics in relation to the origin of life

    Författare :Nguyen Thanh Duc; David Bastviken; Patrick Crill; Nils Holm; Edward Hornibrook; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; methane; methanogens; methane formation; methane oxidation; lake sediment; olivine; origin of life; geokemi; Geochemistry;

    Sammanfattning : Methane (CH4) plays an important role in regulating Earth’s climate. Its atmospheric concentrations are related to both biotic and abiotic processes. The biotic one can be formed either by chemoautotrophic or heterotrophic pathways by methanogens. LÄS MER

  3. 2. Fermentative hydrogen and methane productions using membrane bioreactors

    Författare :Julius Akinbomi; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Encapsulation; Inhibition; hydrodynamics; hydrogen; methane; fruit flavour; Membrane bioreactor; Resursåtervinning; Resource Recovery;

    Sammanfattning : The role of energy as a stimulant for economic growth and environmental sustainabilityof any nation has made the focus on green fuels, including fermentative hydrogen (bioH2) andmethane (bioCH4), to be a priority for the World’s policy makers. Nigeria, as the most populousAfrican country, with worsening energy crisis, can benefit from the introduction of the bioH2 andbioCH4 technologies into the country’s energy mix, since such technologies have the potential ofgenerating energy from organic wastes such as fruit waste. LÄS MER

  4. 3. High (valent) on O2 : Ribonucleotide Reductase and Methane Monooxygenase

    Författare :Juliane John; Martin Högbom; Pål Stenmark; Peter Moody; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ribonucleotide Reductase; Methane Monooxygenase; biokemi; Biochemistry;

    Sammanfattning : Macromolecular X-ray crystallography (MX) is a powerful method to investigate protein structures. However, proteins with redox-active centres and radicals are very susceptible to photoreduction. LÄS MER

  5. 4. Experimental investigation of hydrocarbon formation and transformation under Earth´s upper mantle conditions

    Författare :Anton Kolesnikov; Vladimir Kutcherov; Bertil Sundqvist; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; theory of deep abiotic petroleum origin; natural gas; hydrocarbons; methane; ethane; graphite; hydrogen; high pressure; high temperature; CONAC; BARS; diamond anvil cell; Raman; X-ray; gas chromatography; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : The theory of the abyssal abiotic petroleum origin considers oil and natural gas to begenerated in the Earth’s upper mantle. Hydrocarbons migrate further through the deep faults into the Earth’s crust, where they can form oil and gas deposits in any kind of rock in any kind of structural position. LÄS MER

  7. 5. Deep generated methane in the global methane budget

    Författare :Elena Mukhina; Vladimir G. Kutcherov; Natalia Dubrovinskaya; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Energy Technology; Energiteknik;

    Sammanfattning : Methane is a significant part of the global carbon cycle. The distribution of methane above and below the Earth’s surface suggests that atmospheric methane might be related to methane originating from the deep mantle. LÄS MER