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  • Springer  (65)
  • 1985-1989  (65)
  • 1
    Electronic Resource
    Electronic Resource
    Sex change limited by paternal care: a test using four Mediterranean labrid fishes, genus Symphodus (1985)
    Springer
    Marine biology 87 (1985), S. 89-99 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four species of the Mediterrnean wrasse (genus Symphodus) were investigated under natural conditions near Calvi, Corsica, France, to test the idea that extensive male mating-investment limits the extremes of male reproductive success, and thus reduces selection for protogynous sex change. The four species differ in the extent to which males build nests and care for the eggs, and this sort of paternal care can detract from time spent in mating. In S. ocellatus and S. roissali larger males construct an elaborate nest, ventilate the eggs, and engage in territorial defense. The spawning rates for these males are relatively low and variable due to long periods spent in nest construction and egg tending. They also suffer a large amount of interference from smaller males, which may be due to the predictability of nest location. Sex change appears to be absent. S. tinca males construct only a rudimentary nest, do not ventilate the eggs, and experience much less spawning interference. Large males are relatively more successful in mating in this species, and sex change appears to occasionally occur. The large males of S. melanocercus spawn at a much higher rate than small males, due in part to the fact that they do not construct or defend nests and thus are able to spawn on a daily basis. Sex change appears to be common in this species. Thus, the species that shows the greatest sexual difference in changes of expected fertility with size is also the species that shows the strongest expression of sex change. Studies such as this can begin to indicate the actual costs of changing sex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397010
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  • 2
    Electronic Resource
    Electronic Resource
    RFLP analysis of SLA class I genotypes in Duroc swin (1988)
    Springer
    Immunogenetics 27 (1988), S. 465-469 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364435
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  • 3
    Electronic Resource
    Electronic Resource
    New compactifications of ten and eleven dimensional supergravity on manifolds which are not direct products (1985)
    Springer
    Communications in mathematical physics 99 (1985), S. 141-151 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract Solutions of ten and eleven dimensional supergravity are presented for which the space-time metric is a product of an anti-de Sitter metric and a strictly positive scalar function of the internal coordinates. The critical point of the potential of seven dimensional maximal supergravity with SO(4) symmetry is identified with such a solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01466597
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of ranitidine and cimetidine on imipramine disposition (1986)
    Springer
    European journal of clinical pharmacology 31 (1986), S. 285-290 
    Details
    ISSN: 1432-1041
    Keywords: imipramine ; ranitidine ; cimetidine ; pharmacokinetics ; metabolism ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetic characteristics of imipramine were studied after a single, oral, 100 mg dose was taken by 12 healthy male subjects following 3 days of pretreatment with placebo, cimetidine (300 mg every 6 h), and ranitidine (150 mg every 12 h) in a randomized, double blind, crossover trial. After each imipramine dose plasma samples were collected for 72 h and assayed for imipramine, desipramine, 2-hydroxyimipramine and 2-hydroxydesipramine by HPLC. Cimetidine preadministration statistically prolonged imipramine t1/2 compared to ranitidine (22.7 vs. 13.0 h) or placebo (10.8 h). Mean imipramine area under the curve (AUC) following cimetidine pretreatment was more than double that following placebo (2.633 vs. 0.966 µg·h·ml−1) or ranitidine (1.14 µg·h·ml−1) pretreatment. Imipramine apparent oral clearance was reduced in all 12 subjects after cimetidine. Compared to ranitidine or placebo, cimetidine pretreatment was associated with an increased imipramine/desipramine AUC ratio, suggesting cimetidine-induced impairment of demethylation of imipramine. Ranitidine was not observed to alter imipramine pharmacokinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00981125
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  • 5
    Electronic Resource
    Electronic Resource
    Critical strain to dead bend (1987)
    Springer
    Journal of materials science 6 (1987), S. 951-952 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01729878
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  • 6
    Electronic Resource
    Electronic Resource
    Explaining differences in state growth: Catching up versus Olson (1987)
    Springer
    Public choice 52 (1987), S. 201-213 
    Details
    ISSN: 1573-7101
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: 4. Summary and conclusions In this paper we have tested various explanations for differences in rates of economic growth across states. We found no evidence consistent with Olson's hypothesis that differences in state age (a proxy for the strength of special interest groups) can explain differences in state growth. Furthermore, our results indicate that a regression containing only initial income explains most of the variation in the growth of state income. In sum, a good part of the more rapid growth of southern and other fast-growing states is simply a convergence to the national average. This convergence is an expected result of basic economic theory, given free trade in goods and factors. Our results are, however, not necessarily a rejection of the Olson hypothesis. It may well be that the hypothesis should only be applied to comparisons between nation-states, not to comparisons between political divisions of the same nation-state. The institutional and political similarities of the American states may swamp the differences and make the Olson hypothesis inapplicable. The tendencies cited by Olson may indeed be present in the American economy, but their differential effect is much too small to explain any of the variation in economic performance across states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00116703
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  • 7
    Electronic Resource
    Electronic Resource
    Olivine-normative dolerite dikes from western South Carolina: Mineralogy, chemical composition and petrogenesis (1985)
    Springer
    Contributions to mineralogy and petrology 90 (1985), S. 386-400 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract This investigation describes five Mesozoic dolerite dikes which intrude Paleozoic metamorphic and igneous rocks of the Inner Piedmont of western South Carolina. The dikes are vertical or nearly so and strike approximately N40° W. Three major northeast-trending faults also occur in the study area. Left lateral displacement of one dolerite is documented at a locality near Cleveland, South Carolina. Elsewhere, several of the dolerite dikes appear to terminate at or near the faults. — The dolerite dikes have subophitic to microporphyritic textures and consist principally of plagioclase (generally An70–80), olivine (dominantly Fo80–90) and augite with subordinate pigeonite, titanomagnetite, chromite and brown, partly glassy mesostasis. In one dike pyroxene compositions trend from augite to ferroaugite in contrast to an augite→subcalcic augite→pigeonite trend characteristic of the other dolerites. The contrasting trends primarily result from differences in SiO2 abundance in the dolerite magmas. — Major and trace element analyses indicate the presence of two different olivine-normative dolerite magma types. The two magma types are not related by near surface crystal fractionation. Models for genesis of the olivine-normative dolerite magmas by partial melting of a plagioclase peridotite upper mantle source region are presented. The models require that the source region be enriched in LREE and incompatible elements such as Rb, Ba, Hf and Th relative to Cl chondritic abundances. One magma type appears to represent a primary dolerite magma that ascended from the source region with little subsequent compositional change. The second magma type most likely experienced assimilation of clinopyroxene-garnet (eclogite) during ascent, thereby acquiring a REE pattern with a less steep negative slope for the LREE and a slight positive slope in the HREE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384717
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  • 8
    Electronic Resource
    Electronic Resource
    String structures and the index of the Dirac-Ramond operator on orbifolds (1988)
    Springer
    Communications in mathematical physics 115 (1988), S. 191-212 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We discuss the relationship between “string structures” and the topological class λ∈H 4(M,Z) on non-simply connected manifolds. We also investigate to what extent the index formula for the Dirac-Ramond operator detects the class, λ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01466769
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  • 9
    Electronic Resource
    Electronic Resource
    The structure ofN=16 supergravity in two dimensions (1989)
    Springer
    Communications in mathematical physics 125 (1989), S. 369-384 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We extend the previously constructed linear system forN=16 supergravity in two dimensions by including the unphysical gravitino degrees of freedom. This theory has a residualN=16 “superconformal” invariance that can be bosonized to localE 9 transformations. The modifications to the linear system described here suggest a further extension to an infinite hierarchy of fields and associated gauge transformations related toE 9.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01218408
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  • 10
    Electronic Resource
    Electronic Resource
    On the determination of Harish-Chandra'sβ-function (1986)
    Springer
    Mathematische Zeitschrift 193 (1986), S. 277-283 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01174337
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