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  • 1
    Electronic Resource
    Electronic Resource
    Photoelectron spectra of ortho- and meta-substituted benzonorbornadienes. Relationships to regioselectivities in triplet di-.pi.-methane rearrangements (1978)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 100 (1978), S. 6149-6156 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00487a031
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  • 2
    Electronic Resource
    Electronic Resource
    The Reaction of Sulfur Dioxide with Olefins: the Ceiling Temperature Phenomenon (1943)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 65 (1943), S. 2417-2418 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01252a052
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  • 3
    Electronic Resource
    Electronic Resource
    Fractal analysis of long-range paleoclimatic data: Oxygen isotope record of pacific core V28-239 (1989)
    Springer
    Pure and applied geophysics 131 (1989), S. 307-313 
    Details
    ISSN: 1420-9136
    Keywords: R/S analysis ; paleoclimate ; oxygen isotopes ; Pacific ; comparison of phenomena ; long-term persistence ; fractal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract R/S analysis of the oxygen isotope curve of Pacific core V28-239 yields a fractal dimension of 1.22. This value is considered to characterize global climatic change over the last 2 million years as expressed by changing δO18 ratios and confirms that climatic variations are characterized by long-term persistence. The fractal dimension of 1.22 compares favorably with the approximate fractal dimension of 1.26 for annual precipitation records for nine major cities in the United States. Although the precipitation and oxygen isotope data are measured in different physical units and recorded at different time scales, fractal analysis allows for a mathematical comparison of the two phenomena. Additionally, since the fractal dimensions of the oxygen isotope and precipitation records are similar, it is implied that such fractal dimensions are characteristic of climate change over the spectral range of 10 to 106 years. Given this temperature curves based on fractal parameters of long-term δO18 data could be constructed which would allow examination of characteristics of temperature variation over tens and hundreds of years. Such studies may allow the establishment of limits on natural temperature variation and document the persistence of temperature trends through time. If these trends and limits can be resolved, long-range climatic prediction is feasible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00874493
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  • 4
    Electronic Resource
    Electronic Resource
    Fractal sinuosity of stream channels (1989)
    Springer
    Pure and applied geophysics 131 (1989), S. 99-109 
    Details
    ISSN: 1420-9136
    Keywords: Rivers ; channel pattern ; fractal geometry ; meandering ; sinuosity ; quantitative methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Analysis of a diverse set of twelve stream channel planforms indicates that at scales relevant to river meandering, river traces are most reasonably treated as fractal curves. The atypically high degree of channel wandering apparent at such scales is a common characteristic of all single-channel streams, while identifiable meandering appears to be only one way in which this tendency is expressed. At smaller scales of view river paths have shapes of smooth curves appropriate to Euclidian geometry, and toward larger scales a distinct change in degree of wandering marks the transition to bends that are considered to be changes in general river course rather than parts of channel pattern. This analysis method provides a natural, objective calculation of river sinuosity as well as other parameters that more completely specify channel planform.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00874482
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  • 5
    Electronic Resource
    Electronic Resource
    Regeneration of the Potato Shoot Apex (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 224-224 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] These other results will be awaited eagerly; but it remains quite possible that the transmission of inhibition from the growing-points of these apices is based on a transport of hormones, since one kind of stimulus or influence may follow different rules of transmission from another, even if both ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/171224a0
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  • 6
    Electronic Resource
    Electronic Resource
    Activation of Cambial Growth by Pure Hormones (1935)
    [s.l.] : Nature Publishing Group
    Nature 135 (1935), S. 876-876 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a recent letter to NATURE1 it was reported that strong cambial growth can be activated in young decapitated sun-flower seedlings by inserting their upper ends into tubes containing a weak solution in gelatine of the ether-soluble component of urine. With a similar method it ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/135876a0
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  • 7
    Electronic Resource
    Electronic Resource
    Experiments on the Cause of Dorsiventrality in Leaves (1954)
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 352-353 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SINCE Dr. Sussex now considers that his views are supported by experiments in which the summit of the apex or growing-point was destroyed and dorsi-ventral leaves continued to be found on the apical cone below, it appears that he now thinks that the dorsiventrality of the leaves is induced in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/174352a0
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  • 8
    Electronic Resource
    Electronic Resource
    Experiments on the Cause of Dorsiventrality in Leaves (1954)
    [s.l.] : Nature Publishing Group
    Nature 173 (1954), S. 644-644 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] However, in Epilobiwn hirsutum, which forms radial leaves very readily, we have obtained results similar to those reported by Sussex for potato shoots; for the isolated Ix areas developed only into radial leaves. Yet it is very doubtful whether this indicates that dorsiventrality is induced by the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/173644a0
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  • 9
    Electronic Resource
    Electronic Resource
    Two New Chemical Plant Growth Substances (1937)
    [s.l.] : Nature Publishing Group
    Nature 139 (1937), S. 27-27 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BENZOYL oxide and benzoyl peroxide, as I have found, can now be added to the list of chemicals which act on plant growth like the natural hormone, auxin. Benzoyl oxide, when applied in lanoline at concentration 1 in 200 to ten dark-grown decapitated oat coleoptiles along one side, caused ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/139027a0
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  • 10
    Electronic Resource
    Electronic Resource
    Transmission of Stimuli in Plants (1925)
    [s.l.] : Nature Publishing Group
    Nature 115 (1925), S. 82-83 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN an article in NATURE of October 25 Prof. Dixon1 has reviewed an investigation of conduction in Mimosa pudica which I lately carried out in Trinidad.2 He agrees with my conclusion that “normal” conduction in the stem has been correctly explained by Dr. Ricca as ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/115082a0
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