Sökning: "photosystem II"

Visar resultat 1 - 5 av 74 avhandlingar innehållade orden photosystem II.

  1. 1. Photosystem II : organization, function and regulation

    Författare :Said Eshaghi; Matthias Rögner; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Biogeochemistry; biogeokemi;

    Sammanfattning : What makes plants, green algae and cyanobacteria so remarkable is their ability to convert light energy to chemical energy and at the same time evolve oxygen. In order to do so, they have developed a complex molecular machinery involving pigment and co-factor binding multi-protein complexes. LÄS MER

  2. 2. Photosystem II : inactivation of electron transport reactions, mechanisms and consequences

    Författare :Caroline Jegerschöld; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  3. 3. Challenges in Enzyme Catalysis - Photosystem II and Orotidine Decarboxylase : A Density Functional Theory Treatment

    Författare :Marcus Lundberg; Margareta Blomberg; Per Siegbahn; Jeremy Harvey; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; photosystem II; oxyl radical; manganese systems; orotidine decarboxylase; reaction mechanism; density functional theory; Quantum chemistry; Kvantkemi;

    Sammanfattning : Possibly the most fascinating biochemical mechanism remaining to be solved is the formation of oxygen from water in photosystem II. This is a critical part of the photosynthetic reaction that makes solar energy accessible to living organisms. LÄS MER

  4. 4. Studies of the two redox active tyrosines in Photosystem II

    Författare :Nigar Ahmadova; Fikret Mamedov; Stenbjörn Styring; Robert Burnap; Uppsala universitet; []
    Nyckelord :Photosystem II; Tyrosine Z and D; proton-coupled electron transfer;

    Sammanfattning : Photosystem II is a unique enzyme which catalyzes light induced water oxidation. This process is driven by highly oxidizing ensemble of four Chl molecules, PD1, PD2, ChlD1 and ChlD2 called, P680. Excitation of one of the Chls in P680 leads to the primary charge separation, P680+Pheo-. LÄS MER

  5. 5. Oxidation and reduction reactions of the water-oxidizing complex in photosystem II

    Författare :Long Vo Pham; Johannes Messinger; Imre Vass; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Photosystem II PSII ; oxidation; reduction; flash induced oxygen evolution pattern FIOP ; water; oxygen; global fitting program GFP ; thylakoids; fysikalisk kemi; Physical Chemistry;

    Sammanfattning : The oxygen that we breathe and food that we eat are products of the natural photosynthesis. Molecular oxygen is crucial for life on Earth owing to its role in the glycolysis and citric acid pathways that yield in aerobic organisms the energy-rich ATP molecules. LÄS MER