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  • 1970-1974  (8)
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  • 1
    Electronic Resource
    Electronic Resource
    THE POSITION IN THE PLANT AND THE DATE OF ORIGIN OF TILLERS WHICH PRODUCE INFLORESCENCES (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 25 (1970), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The dates of their first appearance and the dates of flowering were recorded monthly over three years from time of sowing for all tillers produced by S215 meadow fescue plants growing in simulated sward conditions in large concrete pots outdoors. The results are expressed and discussed in terms of the percentage contribution of inflorescences by tillers in relation to their chronological and ontogenetic age. The latter appeared the more important. The major contribution of inflorescences was made by primary tillers in the first harvest year, by secondary and tertiary tillers in the second year and by tertiary and quaternary tillers in the third year. The chronological age at which tillers could flower ranged from 3 to 33 mouths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1970.tb01094.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    λ 4097.3 Niii emission in the chromospheric spectrum? (1971)
    Springer
    Solar physics 16 (1971), S. 336-339 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The recent tentative identification of a chromospheric emission line at λ⊙ = 4097.342 Å with the Niii transition 3s 2 S 1/2 $#x2212; 3p 2 P∘ 3/2 is discussed. It is shown that the observed intensity is inconsistent with the observed flux in the XUV resonance lines and considerably greater than the predicted intensity from the chromosphere-corona transition zone. Microphotometry of a plate shows that the ‘line’ is a short interval of continuum between absorption lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00162475
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thallium in the solar atmosphere (1972)
    Springer
    Solar physics 26 (1972), S. 250-256 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Umbral spectra are shown to contain an absorption feature attributable to the Tl i transition 6p 2 P°3/2−7s 2 S 1/2 at 5350 Å. Analysis of the umbral spectrum suggests a solar abundance in the 0.72〈 log N(Tl)T〈1.10 on the standard scale log N(H) = 12.00. Unidentified blends limit the accuracy of the abundance determination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00155124
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The possible presence of C2 lines in sunspot spectra (1973)
    Springer
    Solar physics 31 (1973), S. 123-126 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Indirect evidence against the presence of C2 lines in umbral spectra is discussed. The dominant role of CO in the molecular equilibrium of C at umbral temperatures ensures that CN, CH and C2 lines are formed in the same atmospheric regions. Observations of CN and CH umbral lines are in good accord with predictions based on accepted umbral model atmospheres. This implies that C2 must follow the predictions and that it is too weak to contribute to the umbral spectrum. C2 lines in the photosphere and penumbrae are in excellent quantitative agreement with predictions. Additional tests are proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00156077
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  • 5
    Electronic Resource
    Electronic Resource
    The influence of disulfide bond reduction and lanthanum on end-plate receptors (1973)
    Springer
    Cellular and molecular life sciences 29 (1973), S. 668-669 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Der Einfluss von Dithioerythritol als Reduktionsmittel und von Lanthan auf die durch Carbamylcholin induzierten Phänomene am Endplatten-rezeptor in mit Kalium depolarisierten Muskelfasern wurde unteruscht. Dithioreythritol hemmte die Endplattenrezeptoraktivierung und beschleunigte die Desensibilisierungsgeschwindigkeit während 0.01 mM Lanthan die Endplattenaktivierung verstärkte, ohne aber einen Einfluss auf die Geschwindigkeit der Desensibilisierung mit oder ohne Dithioerythritol zu haben. 1.0 mM Lanthan hingegen erhöhte sowohl die Geschwindgkeit der Desensibilisierung als auch diejenige der Aktivierung bei Abwesenheit von Dithioerythritol, was den Schluss auf zwei verschiedene Wirkungsorte von Lanthan zulässt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01944762
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The excitation of the forbidden coronal lines (1970)
    Springer
    Solar physics 11 (1970), S. 243-257 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The excitation of the 2s22p2 ground configuration of Caxv is calculated for coronal densities and temperatures. The calculations include electron and proton excitation of the forbidden transitions and electron excitation via the first excited (2s2p3) configuration. It is shown that measurements of the line intensity ratio I(λ 5694)/I(λ 5446) are in good agreement with the predictions. The line to continuum observations for limb flares and coronal condensations are discussed. It is suggested that the calcium abundance in condensations is enhanced owing to diffusion processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00155223
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  • 7
    Electronic Resource
    Electronic Resource
    On the abundance of chlorine in the Sun (1971)
    Springer
    Solar physics 19 (1971), S. 289-296 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A low-noise photoelectric scan which includes the predicted position of the Cli transition 4s 4 P 5/2-4 p 4 D 0 7/2 provides inconclusive evidence for the presence of the line in the solar photospheric spectrum. An upper limit logN(Cl) ⩽ 5.5 is derived. It is pointed out that the fundamental vibration rotation band of HC1 at 3.3 μ should be detectable in the sunspot spectrum unless logN(Cl) 〈 4.6. Sunspot spectra may also provide the isotopic abundance ratio N(Cl35)/N(Cl37). A new derivation of the chlorine abundance for the Orion nebula is presented: logN(Cl) ≈ 5.8. It is suggested that a cosmic abundance logN(Cl) = 5.5 to 5.8 be adopted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146057
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  • 8
    Electronic Resource
    Electronic Resource
    Abrasion resistance of pre-stressed and stressed rubber vulcanizates (1970)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 14 (1970), S. 11-15 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The abrasion resistance of carbon black-reinforced SBR-1500 vulcanizates has been shown to be drastically reduced by the application of tensile strain during the abrasion process. Pre-stressing of similar vulcanizates, however, has no effect upon the abrasion resistance.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1970.070140102
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