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  • Nature Publishing Group  (8)
  • Cambridge University Press
  • Oxford University Press
  • 1955-1959
  • 1945-1949  (8)
  • 1949  (8)
Collection
Publisher
Years
  • 1955-1959
  • 1945-1949  (8)
Year
  • 1
    Electronic Resource
    Electronic Resource
    A Synthesis of iso -Pelletierine and Methyl iso -Pelletierine (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 501-501 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ACCORDING to Robinson's1 theory of the biogenesis of alkaloids, the piperidine (that is, coniine) group of alkaloids is derived from iso-pelletierine (I) and methyl iso-pelletierine (II), which are formed by the condensation of δ-amino- and δ-methylamino-valer-aldehydes ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/164501a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of Chemical Purity (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 503-503 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN developing the isotope dilution method of amino-acid analysis, we have been concerned with the difficulty of proving the purity of the isolated sample of ammo-acid, upon which the accuracy of the determination depends. Elementary analysis and the estimation of reactive groups are not always ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/164503a0
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  • 3
    Electronic Resource
    Electronic Resource
    An Exchange Reaction Involving Alkyl Oxygen and Sulphur (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 365-365 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] INCIDENTAL to the preparation of some sulphur analogues of the synthetic female sex hormones1, we have been studying the relative stability of anisole and thioanisole to various acidic and basic reagents. In one experiment we heated anisole (1 mole), thiophenol (1 mole) and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/164365a0
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  • 4
    Electronic Resource
    Electronic Resource
    Syntheses of Hygrine and Cuscohygrine (1949)
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 289-289 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN his theory of the phytochemical synthesis of alkaloids published in 1917, Robinson1 suggested that hygrine (I) and cuscohygrine (II) were formed by the condensation of acetone dicarboxylic acid, with one and with two molecular proportions respectively of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/163289a0
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  • 5
    Electronic Resource
    Electronic Resource
    The Fischer Indole Synthesis (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 835-835 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE recently suggested theory of Pausacker and Schubert1 involving free radicals in the Fischer indole synthesis appeared to us improbable. It seemed more likely that these experimental results could be explained quite readily by hydrolyses of the hydrazones and recombination to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/164835a0
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  • 6
    Electronic Resource
    Electronic Resource
    Lime Disease in the Gold Coast (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 880-880 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A Disease of seedling lime trees in the Cape Coast district, Gold Coast Colony, is threatening to destroy the industry. Research has revealed the cause of the malady to be a virus existing in at least two strains. In the first of these, symptoms include a one-sided death of the tree coupled ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/164880a0
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  • 7
    Electronic Resource
    Electronic Resource
    Kinetics and Mechanism of Aromatic Nitration (1949)
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 599-600 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN an earlier note1 it was shown how the study of the kinetics of nitration, particularly the study of reaction order, established (a) the formation of the nitronium ion, and (b) its effectiveness as the entity which attacks the aromatic molecule. Further kinetic investigation, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/163599b0
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  • 8
    Electronic Resource
    Electronic Resource
    Tilting-Plate Compensators (1949)
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 442-443 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE various communications describing ingenious modifications of the tilting-plate compensator which have appeared in Nature in recent months suggest that a rather different form, which I improvised from a pair of selenite plates, might be of some interest, particularly as the special materials ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/163442b0
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