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  • 1
    Electronic Resource
    Electronic Resource
    Bread in Jersey during German Occupation (1945)
    [s.l.] : Nature Publishing Group
    Nature 156 (1945), S. 336-337 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THROUGH Mr. E. F. Mitchell, president-elect of the National Association of Master Bakers, Caterers and Confectioners, we received a sample of bread made in Jersey during the German occupation. The analytical data we obtained on this sample will probably be of interest to many. The bread ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/156336b0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Paraffinic hydrocarbons from supercritical-gas extracts of coal as organic geochemical markers (1979)
    [s.l.] : Nature Publishing Group
    Nature 277 (1979), S. 284-287 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the M-alkane fractions of coals, like those from some other sediments, odd carbon numbers predominate over even3. For a series of Saar coals the carbon-preference index (CPI) varied systematically from 1.59 to 1.00 with degree of coalification7, and a related parameter dropped8 from 15.3 to 1.0 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/277284a0
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  • 3
    Electronic Resource
    Electronic Resource
    Structural Differences between the Alkali Imidodisulphates (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 186-187 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Negative piezo-electric tests5 imply that at room temperature the structure of neither ammonium nor rubidium imidodisulphate departs significantly from centrosym-metry. From X-ray diffraction examination, the pseudo-lattice [110] axis of ammonium imidodisulphate shows at 300 K a true repeat ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/207186b0
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrogen Bonding in Calcium Orthophosphates (1962)
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 1090-1091 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In dicalcium 6is(dihydrogen phosphate) mono-hydrate3, Ca(H2PO4)2.H2O, we find that the distances between oxygens in phosphate groups which we believe to be hydrogen-bonded cover the range from 2-48 0-03 A to 2-87 0-05 A with infra-red peaks at 2,320, 2,430, 2,670, 2,920, 3,160, and 3,450 cm-1. In ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1951090a0
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  • 5
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    Magmatic channelisation by reactive and shear-driven instabilities at mid-ocean ridges: a combined analysis (2021)
    Oxford University Press
    Details
    Publication Date: 2021-03-26
    Description: Summary It is generally accepted that melt extraction from the mantle at mid-ocean ridges is concentrated in narrow regions of elevated melt fraction called channels. Two feedback mechanisms have been proposed to explain why these channels grow by linear instability: shear flow of partially molten mantle and reactive flow of the ascending magma. These two mechanisms have been studied extensively, in isolation from each other, through theory and laboratory experiments as well as field and geophysical observations. Here, we develop a consistent theory that accounts for both proposed mechanisms and allows us to weigh their relative contributions. We show that interaction of the two feedback mechanisms is insignificant and that the total linear growth rate of channels is well-approximated by summing their independent growth rates. Furthermore, we explain how their competition is governed by the orientation of channels with respect to gravity and mantle shear. By itself, analysis of the reaction-infiltration instability predicts the formation of tube-shaped channels. We show that with the addition of even a small amount of extension in the horizontal, the combined instability favours tabular channels, consistent with the observed morphology of dunite bodies in ophiolites. We apply the new theory to mid-ocean ridges by calculating the accumulated growth and rotation of channels along streamlines of the solid flow. We show that reactive flow is the dominant instability mechanism deep beneath the ridge axis, where the most unstable orientation of high-porosity channels is sub-vertical. Channels are then rotated by the solid flow away from the vertical. The contribution of the shear-driven instability is confined to the margins of the melting region. Within the limitations of our study, the shear-driven feedback does not appear to be responsible for significant melt focusing or for the shallowly dipping seismic anisotropy that has been obtained by seismic inversions.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Royal Astronomical Society.
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