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  • Springer  (5)
  • American Association for the Advancement of Science
  • 2000-2004
  • 1980-1984
  • 1975-1979  (5)
  • 1965-1969
  • 1977  (5)
Collection
Publisher
Years
  • 2000-2004
  • 1980-1984
  • 1975-1979  (5)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    The $$\dot V_A /\dot Q$$ resolution of inert gas dataresolution of inert gas data (1977)
    Springer
    Bulletin of mathematical biology 39 (1977), S. 87-98 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The non-uniqueness of $$\dot V_A /\dot Q$$ distributions satisfying inert gas retention data without error is studied. The ability of such data to resolve blood flows at particular $$\dot V_A /\dot Q$$ values is discussed through the application of linear programming and Backus-Gilbert theory. It is shown that the resolution deteriorates away from the extremes of low and high $$\dot V_A /\dot Q$$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02460683
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Transequatorial loops interconnecting McMath regions 12472 and 12474 (1977)
    Springer
    Solar physics 52 (1977), S. 69-90 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We discuss the life-story of a transequatorial loop system which interconnected the newly born active region McMath 12474 with the old region 12472. The loop system was probably born through reconnection accomplished 1.5 to 5 days after the birth of 12474 and the loops were observed in soft X-rays for at least 1.5 days. Transient ‘sharpenings’ of the interconnection and a striking brightening of the whole loop system for about 6 hr appear to be caused by magnetic field variations in the region 12474. A flare might have been related to the brightening, but only in an indirect way: the same emerging flux could have triggered the flare and at the same time strengthened the magnetic field at the foot-points of the loops. Electron temperature in the loop system, equal to 2.1 × 106 K in its quiet phase, increased to 3.1 × 106 K during the brightening. Electron density in the loop system was ≤ 1.3 × 109 cm−3 and it could be estimated to ∼7 × 108 cm−3 prior to the brightening. During the brightening the loops became twisted. There was no obvious effect whatsoever of the activity in 12474 upon the in erconnected old region. The final decay of the loop system reflected the decay of magnetic field in the region 12474.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00935791
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of MBC on hyphal tip organization, growth, and mitosis ofFusarium acuminatum, and their antagonism by D2O (1977)
    Springer
    Protoplasma 92 (1977), S. 195-210 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Effects of treatment with methyl benzimidazole-2-ylcarbamate (MBC) on living hyphal tip cells ofFusarium acuminatum were determined with phase contrast light microscopy. These included (i) displacement of mitochondria from hyphal apices, (ii) disappearance of Spitzenkörpers, (iii) reduction of linear growth rate, and (iv) metaphase arrest of all mitoses: responses i–iii were not a result of effects on mitosis. Since all of these responses theoretically could have resulted from an MBC effect on microtubule structure and/or function, heavy water (D2O) was used to counteract MBC. Treatments of hyphae with MBC + D2O caused quantitative responses, i–iii above, intermediate between those to the separate reagents, and some nuclei of these hyphae were not arrested at mitosis. Moreover, several nuclei fragmented (multimicronucleation) in a manner apparently similar to mammalian nuclei treated with antitubulin agents. Thus, the effects of MBC on apical organization, Spitzenkörper integrity, hyphal growth and mitosis could have been mediated through interference with microtubules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279458
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  • 4
    Electronic Resource
    Electronic Resource
    Sex differences in use of a species-typical facial gesture by pigtail monkeys (Macaca nemestrina) (1977)
    Springer
    Primates 18 (1977), S. 565-577 
    Details
    ISSN: 0032-8332
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A species-typical gesture, the “jaw thrust”, was sequentially analyzed in a group of adultM. nemestrina. The major finding was a sex difference in apparent function with male jaw thrust sequences most likely to result in sexual behavior and female sequences most likely to terminate in agonistic behavior. Sex differences in the initiation and reception of jaw thrusts were also observed; they were most commonly initiated by males and directed toward females. Marked stereotypy of the behavioral sequences including jaw thrusts was observed: only a small proportion of the species’ behavioral repertoire was exhibited in temporal association with the gesture. Despite the striking nature of the gesture and the frequency with which it was exhibited, a majority of the signals had no overt social effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383134
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  • 5
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    Transequatorial loops interconnecting McMath regions 12472 and 12474 (1977)
    Springer
    Details
    Publication Date: 1977-04-01
    Print ISSN: 0038-0938
    Electronic ISSN: 1573-093X
    Topics: Physics
    Published by Springer
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