Search for dissertations about: "epr"

Showing result 1 - 5 of 95 swedish dissertations containing the word epr.

  2. 1. Simulation of Relaxation Processes in Fluorescence, EPR and NMR Spectroscopy

    Author : Pär Håkansson; Per-Olof Westlund; Yehudi K. Levine; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; EPR; NMR; Energy migration; bicontinuous cubic phase; Stochastic Liouville Equation; Brownian Dynamics; Fysikalisk kemi; Physical chemistry; Fysikalisk kemi; Physical Chemistry; fysikalisk kemi;

    Abstract : Relaxation models are developed using numerical solutions of the Stochastic Liouville Equation of motion. Simplified descriptions such as the stochastic master equation is described in the context of fluorescence depolarisation experiments. Redfield theory is used in order to describe NMR relaxation in bicontinuous phases. READ MORE

  4. 2. Theoretical studies of EPR parameters of spin-labels incomplex environments

    Author : Bogdan Frecus; Hans Ågren; Chiara Cappelli; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; EPR; DFT; spin-labels; QM MM; Breit-Pauli Hamiltonian;

    Abstract : This thesis encloses quantum chemical calculations performed in the framework of density functional response theory for evaluating electron paramagnetic resonance (EPR) spin Hamiltonian parameters of various spin-labels in different environments. These parameters are the well known electronic g-tensor and the nitrogen hyperfine coupling constants, which are extensively explored in this work for various systems. READ MORE

  5. 3. Density Functional Theory for EPR and NMR Spin Hamiltonian Parameters

    Author : Zilvinas Rinkevicius; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; DFT; EPR; NMR; response theory; Theoretical chemistry; Teoretisk kemi;

    Abstract : .... READ MORE

  6. 4. EPR Studies of Ruthenium-Manganese Complexes as Biomimetic Models for Photosystem II - Approaching Artificial Photosynthesis

    Author : Ping Huang; Biokemi och Strukturbiologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; WOC; bridging-mode modification; water oxidation; EPR; Ru-Mn complexes; PSII; Artificial Photosynthesis; D donor -S sensitizer -A acceptor molecular module; High Mn valence states.; Biochemistry; Metabolism; Biokemi; metabolism;

    Abstract : In natural photosynthesis, solar energy is converted to chemical energy by photosynthetic reaction centers. In green plants and algae, Photosystem II (PSII) and Photosystem I (PSI) absorb light and utilize the charge separation reactions to convert solar energy to chemical energy. READ MORE

  7. 5. The Oxygen Evolving cycle in Photosystem II studied with EPR Spectroscopy at different pH and Temperature

    Author : Susan F Morvaridi; Biokemi och Strukturbiologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; Naturvetenskap; Temperature; Natural science; pH; EPR; S cycle; Photosystem II;

    Abstract : PSII catalyses the light-induced water splitting process which leads to electron transfer through the thylakoid membrane and formation of energy rich molecules. Several redox components including a Mn4Ca, an amino acid residueYZ, two special Chl molecules P680, two Pheo and two quinone molecules participate in this process. READ MORE