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  • Springer  (6)
  • 1985-1989
  • 1980-1984  (6)
  • 1970-1974
  • 1940-1944
  • 1935-1939
  • 1984  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Reaction asymmetries and the spin orbit interaction (1984)
    Springer
    The European physical journal 319 (1984), S. 57-59 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The use of reaction asymmetries to deduce spin orbit interactions in heavy ion reactions is discussed. It is suggested that in most cases they are too sensitive to many other phenomena to be useful tools and reanalysis of some existing data demonstrates that large spin orbit interactions are not required to reproduce the observed asymmetries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01429767
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  • 2
    Electronic Resource
    Electronic Resource
    Surface recrystallization in a single crystal nickel-based superalloy (1984)
    Springer
    Journal of materials science 19 (1984), S. 3867-3872 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract It is shown that, at temperatures above the γ′ solvus, rapid recrystallization occurs in the surface layers of superalloy single crystals which have been cold worked either by surface grit-blasting or by indentation. At temperatures below the γ′ solvus, cellular discontinuous recrystallization may be observed. By applying a recovery treatment insufficient to cause discontinuous recrystallization, it is possible to suppress the recrystallization of grit-blasted specimens when subsequently heated above the γ′ solvus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00980749
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  • 3
    Electronic Resource
    Electronic Resource
    UV-induced reversion of his4 frameshift mutations in rad6, rev1, and rev3 mutants of yeast (1984)
    Springer
    Molecular genetics and genomics 195 (1984), S. 487-490 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The UV-induced reversion of two his4 frameshift alleles was much reduced in rad6 mutants of Saccharomyces cerevisiae, an observation that is consistent with the hypothesis that RAD6 function is required for the induction of all types of genetic alteration in misrepair mutagenesis. The reversion of these his4 alleles, together with two others of the same type, was also reduced in rev1 and rev3 mutant strains; in these, however, the extent of the reduction varied considerably with test allele used, in a manner analogous to the results in these strains for base repair substitution test alleles. The general features of UV-induced frameshift and substitution mutagenesis therefore appear quite similar, indicating that they may depend on related processes. If this conclusion is correct, greater attention must be given to integrating models which account for the production of nucleotide additions and deletions into those concerning misrepair mutagenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341451
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  • 4
    Electronic Resource
    Electronic Resource
    Dimethylsulfoxide induces aneuploidy in a fungal test system (1984)
    Springer
    Molecular genetics and genomics 197 (1984), S. 347-349 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Errors in chromosome segregation leading to numerical anomalies appear to be unusually frequent in Man and consequently a large proportion of conceptions in our species are aneuploid. Concer has been expressed that this frequency may be increased still further following exposure to inducing substances (trisomigens) present in the environment. We have been developing a fungal test system to screen for such trisomigens and in this paper we report its use in detecting induction following exposure to dimethylsulfoxide (DMSO). In our system DMSO induces segregational errors at both the first and second meiotic division. The results also show that increases in aneuploidy are proportional to the underlying spontaneous frequency. If this finding is generally true it will be especially important to avoid exposure to trisomigens as Man might be especially vulnerable to them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330985
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  • 5
    Electronic Resource
    Electronic Resource
    Fire survival of Cape Proteaceae-influence of fire season and seed predators (1984)
    Springer
    Plant ecology 56 (1984), S. 65-74 
    Details
    ISSN: 1573-5052
    Keywords: Fire ; Fynbos ; Germination ; Predation ; Proteaceae ; Seed ; Serotiny ; Succession
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Many Cape Proteaceae store seed reserves in closed cones on the plant and rely entirely on these reserves for episodic recruitment after fires. Population size is sensitive to intervals between fires but also to fire season. Populations can be nearly eliminated by successive winter or spring fires. Three hypotheses explaining seasonal variation in recruitment were tested: (a) seeds germinate immediately after fire but seedlings die from summer drought; (b) seeds remain dormant over summer but the longer the delay between seed release after fire and germination 1) the greater the competition between seedlings and resprouts, or 2) the greater the seed losses to predators and/or decay before germination. Drought-avoiding dormancy occurred in 9 of 11 Cape Proteaceae studied, all of which delayed germination to autumn or winter. Seedling emergence and survival was not significantly increased after removal of competitors by methyl bromide poisoning. Seed predation, measured by exclosures, however, significantly reduced seed reserves before germination and also number of seedlings emerging. Post emergence seedling predation was negligible in the burn in contrast to adjacent mature vegetation where seedling predation was very heavy. The role of germination cues and rodent behaviour in controlling population recruitment is discussed and it is concluded that a knowledge of both is essential for predicting vegetation dynamics in this system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00033048
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  • 6
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    Surface recrystallization in a single crystal nickel-based superalloy (1984)
    Springer
    Details
    Publication Date: 1984-12-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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