Sökning: "polycyclic aromatic hydrocarbon"

Visar resultat 16 - 20 av 23 avhandlingar innehållade orden polycyclic aromatic hydrocarbon.

  1. 16. Molecular Hole Punching : Impulse Driven Reactions in Molecules and Molecular Clusters

    Författare :Michael Gatchell; Henning Zettergren; Henrik Cederquist; Henning Schmidt; Joachim Burgdörfer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PAHs; Fullernes; Reactions; Clusters; Interstellar Medium; Fragmentation; Non-Statistical Fragmentation; Collisions; Experiments; Molecular Dynamics; Density Functional Theory; fysik; Physics;

    Sammanfattning : When molecules are excited by photons or energetic particles, they will cool through the emission of photons, electrons, or by fragmenting. Such processes are often thermal as they occur after the excitation energy has been redistributed across all degrees-of-freedom in the system. LÄS MER

  3. 17. Towards First-Principles Understanding of Biomolecular Adsorption

    Författare :Svetla Chakarova Käck; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DFT; phenol; adenine; graphite; biomolecules; van der Waals interactions; denaturation; protein; lattice models; PAH dimers; adsorption;

    Sammanfattning : A fundamental understanding of the interactions of biomolecules, such as proteins and DNA, with surfaces is of immense importance in numerous applications and poses a true challenge for theory. Density functional theory (DFT) is a quantum-mechanical tool well established for its ability to balance large system size with good accuracy in first-principles studies. LÄS MER

  4. 18. Energetic processing of complex molecules in the gas phase

    Författare :Michael Wolf; Henning Zettergren; Henrik Cederquist; T. Henning Schmidt; Christine Joblin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

    Sammanfattning : Collisions between molecules and gas phase targets often lead to various intriguing processes. Such collisions may induce fragmentation of molecules that can be divided into different subsets depending on the projectile, target, and collision energy. LÄS MER

  5. 19. Spatial variability linking carbon resource heterogeneity and microorganisms; causes and consequences

    Författare :Niklas Törneman; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bakteriologi; virologi; mykologi; Environmental chemistry; Miljökemi; Mikrobiologi; mycology; virology; bacteriology; Microbiology; Ekologi; Ecology; Geostatistics; Microbial activity; Soil organic carbon; Microbial diversity; Biodegradation; Bioremediation; PAH; Spatial patterns;

    Sammanfattning : Organic carbon and bacteria have a high variability at different scales in the soil, and organic carbon may be a limiting factor for growth of soil bacteria. Thus, it can be expected that these co-vary at different scales in the soil. LÄS MER

  7. 20. Laccases from New Fungal Sources and Some Promising Applications

    Författare :Laura Mendoza; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fungi; ligninases; modification of primary alcohols; modification of lignin; laccase applications; dye decolorization;

    Sammanfattning : Fungi are a group of organisms with the ability to produce different types of enzymes in order to get access to nutrients. Among the enzymes, oxidoreductases have the ability to degrade lignocellulosic material via an oxidative mechanism, facilitating the uptake of cellulosic material, which will be metabolized using other enzymes to provide the required nutrients to the fungi. LÄS MER