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  • 1
    Electronic Resource
    Electronic Resource
    Stereochemical consequences of adjacent electron pairs. Theoretical study of rotation-inversion in ethylene dicarbanion (1972)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 1361-1364 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00759a058
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effect of Antioxidants on the Oxidative Stability of Chicken Breast Meat in a Dispersion System (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The antioxidant efficiency of ascorbic acid, α-tocopherol, Trolox C, and catechin were evaluated for chicken breast meat in a dispersion system at 37 °C. Peroxidation was induced by adding different kinds of initiators. The initiators exhibited the following order of catalytic action: ascorbic acid/Fe2+ 〉 hemoglobin 〉 Cu+/H2O2 〉 2,2′-azobis (2-amidinopropane) hydrochloride (AAPH). The antioxidant efficiency of the antioxidants tested depended on their phase distribution and their reactivity to the radicals in various initiation systems. Among the antioxidants tested, catechin was the most effective antioxidant for chicken breast meat oxidation under the experimental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb10632.x
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Absence of molybdenum isotope fractionation during magmatic differentiation at Hekla volcano, Iceland (2015)
    Elsevier
    In:  Geochimica et Cosmochimica Acta, 162 . pp. 126-136.
    Details
    Publication Date: 2017-06-16
    Description: This study investigates the behaviour of molybdenum (Mo) isotopes during magmatic differentiation. Molybdenum isotope compositions, as well as concentrations of rare earth elements and a selection of trace elements, have been determined for a well characterised sequence of lavas from Hekla volcano, Iceland, covering a compositional range from basalt to rhyolite (46-72wt.% SiO2), and thought to have developed by differentiation and mixing of melts derived from a cogenetic source. All samples have identical Mo isotopic compositions with an average δ98Mo of -0.15±0.05‰ (2 s.d.; n=23). There is therefore no resolvable Mo isotope fractionation during magmatic differentiation at Hekla. This finding is supported by the fact that Mo remains highly incompatible in Hekla lavas, increasing from 1.3 to 4.6μg/g from basalt to rhyolite, indicating that the crystallising phases are extracting only limited amounts of Mo from the magma and therefore that significant fractionation of Mo isotopes is unlikely. It has previously been proposed that cerium (Ce) and Mo have similar bulk distribution coefficients and are equally incompatible during mantle melting. While both Ce and Mo remain incompatible in Hekla lavas, the Ce/Mo ratio decreases from 50 to 36 during magmatic differentiation indicating that Mo is more incompatible than Ce. Comparison of Mo with other incompatible trace elements indicates that Mo is as incompatible as La and slightly less incompatible than K. Sulphur (S) decreases strongly from ~200 to as low as ~2μg/g from basalt to andesite and more evolved compositions, yet this has no effect on the Mo isotopes. Therefore, Mo does not exhibit significant chalcophile behaviour in Hekla magmas. The Mo isotopic signature therefore may be used as an indicator of parent magma composition and a potential discriminant of assimilation processes.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.gca.2015.04.011
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Magnetic field gradient driven dynamics of isolated skyrmions and antiskyrmions in frustrated magnets (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-05-16
    Description: The study of skyrmion/antiskyrmion motion in magnetic materials is very important in particular for the spintronics applications. In this work, we study the dynamics of isolated skyrmions and antiskyrmions in frustrated magnets driven by magnetic field gradient, using the Landau–Lifshitz–Gilbert simulations on the frustrated classical Heisenberg model on the triangular lattice. A Hall-like motion induced by the gradient is revealed in bulk system, similar to that in the well-studied chiral magnets. More interestingly, our work suggests that the lateral confinement in nanostripes of the frustrated system can completely suppress the Hall motion and significantly speed up the motion along the gradient direction. The simulated results are well explained by Thiele theory. It is demonstrated that the acceleration of the motion is mainly determined by the Gilbert damping constant, which provides useful information for finding potential materials for skyrmion-based spintronics.
    Electronic ISSN: 1367-2630
    Topics: Physics
    Published by Institute of Physics (IOP)
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  • 5
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    Dynamics of distorted skyrmions in strained chiral magnets (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-06-29
    Description: In this work, we study the microscopic dynamics of distorted skyrmions in strained chiral magnets (Shibatak et al 2015 Nat. Nanotechnol. 10 589) under gradient magnetic field and electric current by Landau–Lifshitz–Gilbert simulations of the anisotropic spin model. It is observed that the dynamical responses are also anisotropic, and the velocity of the distorted skyrmion is periodically dependent on the directions of the external stimuli. Furthermore, in addition to the uniform motion, our work also demonstrates an anti-phase harmonic vibration of the two skyrmions in nanostripes, and the frequencies can be effectively modulated by the anisotropic Dzyaloshinskii–Moriya interaction. The simulated results are well explained by Thiele’s theory, which may provide useful information in understanding the dynamics of the distorted skyrmions.
    Electronic ISSN: 1367-2630
    Topics: Physics
    Published by Institute of Physics (IOP)
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  • 6
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    Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-01-25
    Description: Article Fully mapping the Fermi surface of a compound provides a clear picture of its fundamental properties. Through thermoelectric measurements of the underdoped cuprate YBa 2 Cu 3 O y , this study shows evidence for a second Fermi pocket, consistent with charge–density–wave Fermi surface reconstruction. Nature Communications doi: 10.1038/ncomms7034 Authors: N. Doiron-Leyraud, S. Badoux, S. René de Cotret, S. Lepault, D. LeBoeuf, F. Laliberté, E. Hassinger, B. J. Ramshaw, D. A. Bonn, W. N. Hardy, R. Liang, J.-H.. Park, D. Vignolles, B. Vignolle, L. Taillefer, C. Proust
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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