Sökning: "IRON"

Visar resultat 31 - 35 av 1581 avhandlingar innehållade ordet IRON.

  1. 31. Atom and Group Transfer Reactions Involving High-valent Iron Complexes

    Författare :Yong Li; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Iron enzymes; high-valent iron intermediates; bio-inspired iron complexes; FeIV=O; FeIV=NR; catalytic reactions; electronic effects; steric restriction.;

    Sammanfattning : Iron enzymes play critical roles in biological oxidation reactions by utilizing highly reactive high-valent iron intermediates, such as FeIV=O, FeV(O)(OH), and FeIV=NR species, for catalytic reactions. These intermediates exhibit remarkable catalytic behavior with high reactivities and high regio- and stereospecificity in various biochemical reactions. LÄS MER

  3. 32. Iron in human milk : a study on the role of lactoferrin and the distribution of iron and some other trace elements in milk

    Författare :Gun-Britt Fransson; Uppsala universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : .... LÄS MER

  4. 33. Synthesis of carbon-covered iron nanoparticles by photolysis of ferrocene

    Författare :Karine Elihn; Knut Deppert; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; iron; carbon; nanoparticle; ferrocene; laser-assisted CVD; particle size; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : One important driving force in nanotechnology today is the change which can be made in the properties of a material when the dimensions of its individual building blocks are decreased below approximately 100 nm. Such small building blocks, typically nanoparticles, may induce new and unique properties compared to those of the corresponding bulk material. LÄS MER

  5. 34. Heterocystous cyanobacteria, Dps proteins and H2 production

    Författare :Christoph Howe; Karin Stensjö; Felix Howe; Nir Keren; Uppsala universitet; []
    Nyckelord :H2 production; Cyanobacteria; Dps; ferritin-like proteins; iron; nutrient limitation; oxidative stress; biofilm; photobioreactor; iron homeostasis; H2O2;

    Sammanfattning : To mitigate climate change, CO2-emitting technologies have to be exchanged by renewable alternatives such as H2. H2 can be produced by cyanobacteria, but major efforts to enhance H2 production yields by genetic modifications or optimised cultivation conditions resulted in energetic photo-to-H2 conversion efficiencies of 4. LÄS MER

  7. 35. Iron in Haem Biosynthesis. Structural Studies of Ferrochelatase and Frataxin

    Författare :Tobias Karlberg; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap; Natural science; Molekylär biofysik; Molecular biophysics; Biomedicinska vetenskaper; Biomedical sciences; protein crystallography; ferrochelatase; haem biosynthesis; iron; frataxin;

    Sammanfattning : Ferrochelatase catalyses the synthesis of heme by inserting Fe(II) into protoporphyrin IX. The structure of ferrochelatase from yeast has been determined (2.4 Å). The structure is homodimeric with each of the monomer made up of two Rossmann type domains with an active-site cleft between them. LÄS MER