Search for dissertations about: "Photosynthetic reaction center"

Showing result 1 - 5 of 23 swedish dissertations containing the words Photosynthetic reaction center.

  2. 1. Life of Excitons in Artificial Photosynthetic Antennas

    Author : Johan Andersson; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Zn-porphyrin; Osmium; Ruthenium; Polypyridine; Inter Ligand Energy Transfer; Inter System Crossing; Excited state dynamics; Transition metal complexes; Photosynthetic Antennas; Solar energy conversion; Artificial photosynthesis; Physical chemistry; Fysikalisk kemi; Transient Absorption Anisotropy.; Reaction Center; Dendrimer; Energy Transfer;

    Abstract : Due to the predicted energy crisis when fossil fuels will be exhausted it is important to search for alternative energy sources. Utilizing sunlight via artificial photosynthesis is an interesting possibility. READ MORE

  4. 2. Ultrafast Structural Changes in a Bacterial Photosynthetic Reaction Center probed with XFEL Radiation

    Author : Robert Dods; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Photosynthesis; Reaction Center; Time-resolved crystallography; XFEL; membrane protein;

    Abstract : Photosynthesis is the process by which plants and many species of bacteria convert energy from sunlight into chemical energy used to power their metabolism. As these plants and bacteria are eaten, the chemical energy moves up the food chain and thus photosynthesis provides fuel for almost all life on Earth. READ MORE

  5. 3. Structural Insights at Sub-Ångstrom, Medium and Low Resolution: Crystallization of Trypsin, Bacterioferritin, Photosynthetic Reaction Center, and Photosynthetic Core Complex

    Author : Weixiao Yuan Wahlgren; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; protein crystallization; cubic phase; sponge phase; bicelle; trypsin; bacterioferritin; reaction center; core complex; photosynthesis;

    Abstract : The catalytic action of serine proteases depends on the interplay of a nucleophile, a general base and a general acid. The catalytic triad is composed of serine, histidine and aspartate residues. The serine acts as a nucleophile while the histidine plays a dual role as the general base or acid at different steps of the reaction. READ MORE

  6. 4. Photosynthetic water oxidation : the function of two extrinsic proteins

    Author : Tatiana Shutova; Göran Samuelsson; Stenbjörn Styring; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; photosystem II; Psb0; Cah3; water oxidation; Plant physiology; Växtfysiologi;

    Abstract : The solar energy accumulated by photosynthesis over billions of years is the sole source of energy available on Earth. Photosystem II (PSII) uses the sunlight to split water, an energetically unfavorable reaction where electrons and protons are extracted from water and oxygen is released as a by-product. READ MORE

  7. 5. X-ray free-electron laser based methods for structural and ultrafast dynamics studies of a photosynthetic reaction centre

    Author : David Arnlund; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; WAXS; wide-angle x-ray scattering; XFEL; x-ray free-electron laser; reaction center; structural biology; ultrafast dynamics;

    Abstract : Life on earth is fuelled by the energy of sunlight, which must first be captured and converted into a chemical energy form useful to the cell. This process is known as photosynthesis and the major pathway of this energy conversion is via photosynthetic reaction centres. READ MORE