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  • 2015-2019
  • 1995-1999  (24)
  • 1980-1984
  • 1975-1979  (28)
  • 1997  (24)
  • 1979  (17)
  • 1978  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Electronic spectroscopy of polyatomic molecules by low-energy, variable-angle electron impact (1979)
    s.l. : American Chemical Society
    Chemical reviews 79 (1979), S. 77-96 
    Details
    ISSN: 1520-6890
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cr60317a006
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  • 2
    Electronic Resource
    Electronic Resource
    Deficits in auditory temporal and spectral resolution in language-impaired children (1997)
    [s.l.] : Nature Publishing Group
    Nature 387 (1997), S. 176-178 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We measured the detection threshold for a brief tone presented before, during or after two different masking noises in eight children diagnosed with specific language impairment, and in eight control children with normal language skills who matched the others in age and non-verbal intelligence ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/387176a0
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  • 3
    Electronic Resource
    Electronic Resource
    PATTERNS OF HEROIN USE (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 311 (1978), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1978.tb16759.x
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  • 4
    Electronic Resource
    Electronic Resource
    Response of American cockroach (Periplaneta americana) olfactory receptors to selected alcohol odorants and their binary combinations (1997)
    Springer
    Journal of comparative physiology 180 (1997), S. 701-709 
    Details
    ISSN: 1432-1351
    Keywords: Key words Olfaction  ;  Odor discrimination  ; Mixture perception
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The cockroach is known to possess several morphologically distinct types of sensilla on its antenna, each of which contain a couple or a few receptor cells that respond to an array of compounds. We recorded the response of cells exclusively from one type of sensillum to evaluate the variation in the response of the cells in these sensilla to three closely related alcohols and their binary mixtures. Our results indicate that cells within the class of those responsive to aliphatic alcohols are otherwise variable in their response to particular aliphatic alcohols and not easily classifiable into subclasses. They also indicate that patterns of responses among cells are not robust with respect to concentration. Finally, a considerable level of inhibition is indicated in the response of the receptor cells to binary mixtures compared with the response to pure odorants. The data suggest that discrimination of alcohols (and other odorants of general but not special significance) by the cockroach cannot be understood simply in terms of labeled lines or linear filters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003590050084
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  • 5
    Electronic Resource
    Electronic Resource
    Plant molecular biology comes of age (1979)
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 719-720 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PLANT molecular biology is rapidly coming of age, or at least such was the consensus of 160 plant scientists from several dozen countries who attented a recent workshop on Genome Organisation and Expression in Plants. The workshop underscored the number of highly qualified young investigators now ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/280719a0
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  • 6
    Electronic Resource
    Electronic Resource
    Host-parasite dynamics and the evolution of host immunity and parasite fecundity strategies (1997)
    Springer
    Bulletin of mathematical biology 59 (1997), S. 427-450 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract We explore evolutionarily stable co-evolution of host-macroparasite interactions in a discrete-time two-species population dynamics model, in which the dynamics may be stable, cyclic or chaotic. The macroparasites are assumed to harm host individuals through decreased reproductive output. Hosts may develop costly immune responses to defend themselves against parasites. Parasites compete with conspecifics by adjusting their fecundities. Overall, the presence of both parasites and the immune response in hosts produces more stable dynamics and lower host population sizes than that observed in the absence of the parasites. In our evolutionary analyses, we show that maximum parasite fecundity is always an evolutionarily stable strategy (ESS), irrespective of the type of population interaction, and that maximum parasite fecundity generally induces a minimum parasite population size through over-exploitation of the host. Phenotypic polymorphisms with respect to immunity in the host species are common and expected in ESS host strategies: the benefits of immunication depend on the frequency of the immune hosts in the population. In particular, the steady-state proportions of immune hosts depend, in addition to all the parameters of the parasite dynamics only on the cost of immunity and on the virulence of parasites in susceptible hosts. The implicit ecological dynamics of the host-parasite interaction affect the proportion of immune host individuals in the population. Furthermore, when changes in certain population parameters cause the dynamics of the host-parasite interaction to move from stability to cyclicity and then to chaos, the proportion of immune hosts tends to decrease; however, we also detected counter-examples to this result. As a whole, incorporating immunological and genetic aspects, as well as life-history trade-offs, into host-macroparasite dynamics produces a rich extension to the patterns observed in the models of ecological interactions and epidemics, and deserves more attention than is currently the case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02459459
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  • 7
    Electronic Resource
    Electronic Resource
    Composition and abundance of phytoplankton in tributaries of the lower Colorado river, Grand Canyon region (1979)
    Springer
    Hydrobiologia 66 (1979), S. 81-93 
    Details
    ISSN: 1573-5117
    Keywords: algae ; phytoplankton ; Colorado River ; Grand Canyon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phytoplankton distribution and abundance in eleven tributaries of the Colorado River within the Grand Canyon were investigated from April, 1975 to June, 1976. During this period a total of 56 genera and 156 species of phytoplankton was identified. Phytoplankton species of the individual tributaries were quite distinct, with only four diatom species, Diatoma vulgare, Navicula tripunctata, Nitzschia linearis and Synedra ulna, common to all the tributaries. Bright Angel Creek, Shinumo Creek and Elves Chasm were the tributaries with the most diverse algal flora, whereas Vaseys Paradise, Tapeats Creek, Deer Creek and Havasu Creek showed the lowest species richness. Elves Chasm and Diamond Creek had the highest phytoplankton numbers. Phytoplankton abundance and species richness appeared to be influenced by high turbidity, current velocity, fluctuating water levels and age of the water. Some of the dominant algal species, Biddulphia laevis, Cocconeis pediculus, Cymbella ventricosa, Epithemia sorex, Gomphonema parvulum and Synedra ulna, showed significant correlations with specific physico-chemical characteristics of the tributaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019143
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  • 8
    Electronic Resource
    Electronic Resource
    Solutions of several 3He-A textures bearing surface singularities (1978)
    Springer
    Journal of low temperature physics 32 (1978), S. 301-321 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Exact solutions are found of three textures for superfluid helium-3 in the A phase: two cylindrically symmetric textures in half-spaces each bearing a point singularity on the surface (which are categorized as the circular and hyperbolic boojum textures by Mermin), and a vortex sheet texture in a slab geometry, which is singular on two straight lines, one on each wall. The dipole interaction between the spin axis % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqaqpepeea0xe9qqVa0l% b9peea0lb9sq-JfrVkFHe9peea0dXdarVe0Fb9pgea0xa9pue9Fve9% Ffc8meGabaqaciGacaGaaeqabaWaaeaaeaaakeaaieqaceWFKbGbaK% aaaaa!387B!\[{\hat d}\] and the orbital axis Î is taken into account to leading order by letting % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqaqpepeea0xe9qqVa0l% b9peea0lb9sq-JfrVkFHe9peea0dXdarVe0Fb9pgea0xa9pue9Fve9% Ffc8meGabaqaciGacaGaaeqabaWaaeaaeaaakeaaieqaceWFKbGbaK% aaaaa!387B!\[{\hat d}\] = Î, assuming temperature T is near the transition temperature T c, and the container size is ≫10\s-3 cm (the dipole characteristic length). Guided by these exact solutions, we then construct an approximate solution for a coreless vortex texture, which was first introduced by Anderson and Toulouse and later modified by Mermin in order for it to fit between two parallel surfaces. It was proposed by Anderson and Toulouse that such coreless vortex textures should replace usual vortex lines in mediating the decay of superfluidity and in transferring angular momentum from the container wall to the superfluid 3He-A. This is found to be true here only if D158.0(ξR)1/2, where D is the thickness of the slab geometry assumed R is the lateral size of this geometry, and ξ is the core size of a usual vortex line in 3He-A. This analysis is good for R ≫ D, but it should remain semiquantitatively valid down to R ~(2—3)D.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00116917
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  • 9
    Electronic Resource
    Electronic Resource
    G. R. Carmichael, G. E. Folk and J. L. Schnoor (eds.): 1995, Preparing for Global Change: A Midwestern Perspective (1997)
    Springer
    Climatic change 37 (1997), S. 569-573 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005330330263
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  • 10
    Electronic Resource
    Electronic Resource
    Isolation and restriction mapping of plasmids containing ribosomal DNA sequences from the rrn B cistron of E. coli (1979)
    Springer
    Molecular genetics and genomics 172 (1979), S. 171-178 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Recombinant plasmids containing the entire 16S RNA gene from the rrn B cistron of E. coli inserted in Col E1 and pBR322 plasmid vectors have been constructed. These plasmids have been mapped using several restriction endonucleases as well as by DNA-RNA hybridization. These maps reveal previously undetected restriction sites in the rrn B cistron and in Col E1 plasmid DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00268279
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