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  • Photosystem II  (1)
  • electron paramagnetic resonance  (1)
  • evolution  (1)
  • nanotubes  (1)
  • radical cation  (1)
  • 1
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    Nanomaterials Based Gas Sensors for SF6 Decomposition Components Detection (2017)
    Rijeka : InTech
    Details
    Keywords: nanomaterials ; nanotubes
    Description / Table of Contents: Chapter 1: The SF6 Decomposition Mechanism: Background and Significance by Xiaoxing Zhang, Ju Tang, Song Xiao and Fuping Zeng --- Chapter 2: Application of CNTs Gas Sensor in Online Monitoring of SF6 Insulated Equipment by Xiaoxing Zhang, Song Xiao, Ju Tang and Cheng Pan --- Chapter 3: Application of TiO2 Nanotubes Gas Sensors in Online Monitoring of SF6 Insulated Equipment by Ju Tang, Xiaoxing Zhang, Song Xiao and Fuping Zeng --- Chapter 4: Application of Graphene Gas Sensors in Online Monitoring of SF6 Insulated Equipment by Xiaoxing Zhang, Ju Tang, Song Xiao and Cheng Pan --- Chapter 5: Comparative Study of Materials to SF6 Decomposition Components by Xiaoxing Zhang, Ju Tang, Song Xiao, Fuping Zeng, Cheng Pan and Yingang Gui
    Pages: Online-Ressource (158 Seiten)
    ISBN: 9789535132585
    URL: https://www.intechopen.com/books/nanomaterials-based-gas-sensors-for-sf6-decomposition-components-detection
    Language: English
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    E-BOOK
  • 2
    Electronic Resource
    Electronic Resource
    A hydrogen-atom abstraction model for the function of YZ in photosynthetic oxygen evolution (1995)
    Springer
    Photosynthesis research 46 (1995), S. 177-184 
    Details
    ISSN: 1573-5079
    Keywords: electron paramagnetic resonance ; managanese cluster ; oxygen evolution ; oxygen evolving complex ; Photosystem II ; proton transfer ; tyrosine radical ; water oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Recent magnetic-resonance work on YŻ suggests that this species exhibits considerable motional flexibility in its functional site and that its phenol oxygen is not involved in a well-ordered hydrogen-bond interaction (Tang et al., submitted; Tommos et al., in press). Both of these observations are inconsistent with a simple electron-transfer function for this radical in photosynthetic water oxidation. By considering the roles of catalytically active amino acid radicals in other enzymes and recent data on the water-oxidation process in Photosystem II, we rationalize these observations by suggesting that YŻ functions to abstract hydrogen atoms from aquo- and hydroxy-bound managanese ions in the (Mn)4 cluster on each S-state transition. The hydrogen-atom abstraction process may occur either by sequential or concerted kinetic pathways. Within this model, the (Mn)4/YZ center forms a single catalytic center that comprises the Oxygen Evolving Complex in Photosystem II.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020428
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Vacuolar proton pumps (1989)
    Springer
    Journal of bioenergetics and biomembranes 21 (1989), S. 605-620 
    Details
    ISSN: 1573-6881
    Keywords: Proton-translocating ATPase ; organelle acidification ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Physics
    Notes: Abstract Recently a new class of proton-translocating ATPases has been localized to endomembrane compartments in plant, fungal, and mammalian cells. These proton pumps are large hetero-oligomers which have an ATP hydrolytic sector that is functionally and structurally distinct from a transmembranous proton pore. Enzymatic characteristics of these proton pumps are discussed as well as the current state of knowledge regarding subunit composition and function. In addition, recent primary sequence data are discussed which indicate that these proton pumps share a common ancestor with F1F0-type proton pumps of mitochondria
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00808116
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Interplay between Molecular Recognition and Redox Properties: A Theoretical Study of the Inclusion Complexation of β-Cyclodextrin with Phenothiazine and its Radical Cation (2000)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 38 (2000), S. 199-206 
    Details
    ISSN: 1573-1111
    Keywords: cyclodextrin ; inclusion ; phenothiazine ; radical cation ; theoretical study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The PM3 molecular orbital method was employed in the conformational analysis of the inclusion complexation of β-cyclodextrin with phenothiazine and its radical cation from a complete and unrestricted geometry optimization. Ab initio calculations at the level of HF/3-21G(d) and B3LYP/3-21G(d) were utilized to determine the electronic structures of the host, guest and their complexes. The results indicated that the complexation of β-cyclodextrin with the phenothiazineradical cation was significantly more favorable than that with the neutral one, in good agreement with the experimental observation. The charge-transfer interaction was proposed as a physical reason for such behavior. It is suggested that caution should be given when extrapolating one oxidation state behavior to the supramolecular systems in their other oxidation states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008106831450
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