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  • 1
    Electronic Resource
    Electronic Resource
    Alteration in Surface Area of Carbonized Coals on Oxidation (1958)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 62 (1958), S. 1604-1605 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150570a043
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    ELECTROMAGNETIC RESPONSE OF A BROKEN ORE-VEIN (MODEL STUDIES) (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 24 (1976), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: A broken ore-vein is very common in nature. A small scale model of such a vein has been made by placing two thin metal sheets edge to edge with an air gap between them. The electromagnetic response of this model in a uniform oscillating magnetic field has been measured. The results show that (a) the response of the whole body is not the sum of responses of the constituent parts, (b) the response of the upper part is dominant by virtue of its proximity to the receiving coil and (c) the lower part has the effect of making the upper part appear nearer to the surface and poorer in conductance than it really is.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1976.tb00923.x
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  • 3
    Electronic Resource
    Electronic Resource
    The Ricci curvature of Diff S1/SL(2, R) (1988)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 29 (1988), S. 1979-1981 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Previous calculations of the Ricci curvature for the manifold Diff Diff(S1)/S1 are extended to Diff(S1)/SL(2@SR). These manifolds are distinguished by being coadjoint orbits of Diff(S1) which admit compatible symphectic and complex structures, making them Kähler manifolds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.527854
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  • 4
    Electronic Resource
    Electronic Resource
    Spatially inhomogeneous structures in a one-dimensional array of Brussellators (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 7459-7467 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Considering a one-dimensional array of diffusively coupled Brussellators, we examine the bifurcations of the steady homogeneous solution to steady but spatially inhomogeneous structures. Several important aspects of such bifurcations are related to branching (see below) of the fixed point of a four-dimensional conservative map. In addition to the usual period doubling ("wavelength doubling'' in our terminology) observed in case of two-dimensional maps, the four-dimensional map is seen to exhibit a new type of branching, namely, giving rise to an invariant curve in phase space. In case of subthreshold branching of either type, the steady homogeneous solution bifurcates to either a "wavelength-two'' or a quasiperiodic solution. In case of superthreshold branching, on the other hand, bifurcations involving more complicated spatial and temporal behavior are possible. Other relevant questions are dealt with.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454310
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  • 5
    Electronic Resource
    Electronic Resource
    The functional approach in biology
    Amsterdam : Elsevier
    Biosystems 9 (1977), S. 57-68 
    Details
    ISSN: 0303-2647
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0303-2647(77)90032-6
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  • 6
    Electronic Resource
    Electronic Resource
    Initial Stages of Oxidation of Coal (1960)
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 502-503 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Earlier2,3 it was shown that prolonged oxidation of coal at temperatures ranging from 170 C. to 220 C. leads to preferential oxidation of the non-aromatic part leaving the aromatic nucleus unaffected, and therefrom structural parameters of coal were deduced4-7. The same mode of oxidation at 170 C. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/187502a0
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  • 7
    Electronic Resource
    Electronic Resource
    Alicyclicity and Smoke Emission of Coal (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 1613-1613 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been shown elsewhere8 that dehydrogenated coals (for example, by Vesterberg's technique dehydrogenation carried out with sulphur below the decomposition point of coal) do not yield any tar and that the char yield increases proportionately to the alicyclic carbon content of coal at the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1831613a0
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Chromatographic Separation of Coal Bitumens (1945)
    [s.l.] : Nature Publishing Group
    Nature 155 (1945), S. 77-78 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] INTEREST has long been focused on the so-called soluble coal bitumens, since Bone and Fischer demonstrated their influence on the coking characteristics of bituminous coals. Attention was specially directed towards the Fractions III and IV (Bone) of the high-pressure benzene extracts from ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/155077a0
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  • 9
    Electronic Resource
    Electronic Resource
    Action of Permanganate on Coal (1962)
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 267-268 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Whether acidic or alkaline permanganate is used, the reaction on coal has been found to be immediate and vigorous even at room temperature, and it does not cease at any particular point and may well continue to the point of complete degradation of coal into water-soluble products. Such products ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/193267a0
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  • 10
    Electronic Resource
    Electronic Resource
    Germination of Rice Embryo under Water and its Relation of Growth to Endosperm Fractions (1955)
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 1046-1047 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been observed that some factor present in the endosperm has a distinct inhibitory effect on the growth of the rice embryo kept under water or grown in air. Experiments were carried out with husked rice grain (variety Bhasamanik) from which different fractions of endosperm were removed, kept ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1751046b0
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