ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (59)
  • Springer  (53)
  • American Institute of Physics  (6)
  • Macmillian Magazines Ltd.
  • 2000-2004
  • 1985-1989  (59)
  • 1935-1939
  • 1987  (59)
Collection
  • Articles  (59)
Source
Keywords
Publisher
Years
  • 2000-2004
  • 1985-1989  (59)
  • 1935-1939
Year
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Pollination-related characteristics in the mimosoid legumeAcacia terminalis (Leguminosae) (1987)
    Springer
    Plant systematics and evolution 157 (1987), S. 49-62 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Leguminosae ; Mimosoideae ; Acacia terminalis ; Bee- and bird-pollination ; extrafloral nectaries ; intraspecific variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intraspecific variation has been found for several pollination-related characteristics in two isolated populations of the self-incompatible treeAcacia terminalis: floral characteristics including colour and flowering time; style length; size and colour of extrafloral nectaries on the leaf petioles; chemical components of the extrafloral nectar; different taxa of bee pollinators; and frequency differences in bird pollinators. These differences possibly reflect the evolution of two different pollination syndromes within this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939180
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    High pressure raman study of isotropic lineshapes of aqueous sodium nitrate solutions (1987)
    Springer
    Journal of solution chemistry 16 (1987), S. 55-69 
    Details
    ISSN: 1572-8927
    Keywords: Nitrate ion ; sodium nitrate ; Raman spectra ; high pressure ; concentrated solutions ; line shapes ; vibrational correlation functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The isotropic lineshape of the v1 (A1) stretching mode of the nitrate ion in solutions of sodium nitrate has been studied at 25°C as a function of NaNO3 concentration ranging from 0.1 to 6M. The pressure dependence has been determined for 1 and 6M solutions at pressures ranging from 1 bar to 3 kbar. The isotropic band becomes more asymmetric with increasing concentration, and its v1 peak frequency undergoes a blue shift both with increased concentration and increased pressure. At low concentration the vibrational correlation function is well described by the Kubo formula, whereas at higher concentration it becomes more Gaussian. The experimental data indicate that the v1 vibrational lineshape in aqueous solutions of NaNO3 is dominated by strong intermolecular interactions which produce inhomogeneous broadening at higher concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647015
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Sensory cues and receptors for oviposition by Heliothis virescens (1987)
    Springer
    Entomologia experimentalis et applicata 43 (1987), S. 159-168 
    Details
    ISSN: 1570-7458
    Keywords: Heliothis virescens ; Tobacco budworm ; Noctuidae ; contact chemoreception ; olfaction ; vision ; mechanoreception ; tarsi ; antennae ; compound eyes ; ovipositor ; host finding ; cotton ; ground cherry ; soybean isolines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les différentes récepteurs sensoriels (chimique, mécanique et visuel) des femelles d'H. virescens ont été rendus inactifs par traitement à l'acide, antennotectomie ou peinture des yeux avec un enduit noir du type vernis à ongles, pour étudier le déterminisme sensoriel de la sélection des hôtes lors de la ponte; les papillons avainet le choix entre le coton (Gossypium hirsutum), sur lequel ils pondent normalement, et Physalis angulata sur lequel on n'observe pas de pontes dans la nature. Au laboratoire, à faible distance, le choix de H. virescens dépendait en premier lieu des mécanorécepteurs et des récepteurs chimiques dits de contact (gustatifs), et non de la vision ou de l'olfaction. En présence d'un certain niveau de pilosité (P. angulata possède de courts poils capités), les femelles choisissent les plantes en fonction de la perception chimique dite de contact (gustation) tant qu'une paire de tarses reste intacte. Les sensilles chimiques de l'ovitube ne semblent pas jouer un rôle important à cet égard. La discussion a examiné ces résultats à la lumière des processus sensoriels utilisés par d'autres papillons.
    Notes: Abstract When given a choice of cotton (host) and ground cherry (non host) in a close range situation, Heliothis virescens (F.), the tobacco budworm, depends primarily on contact chemoreception and mechanoreception, and not olfaction or vision, to discriminate between these two plant species for oviposition. Further, in the presence of a certain level of hairiness (the non-host plant, ground cherry, has short capitate hairs), the females are capable of discriminating between these two plants based on contact chemosensory cues, if at least one pair of tarsi is intact. The contact chemosensilla on the ovipositor do not seem to be important for this purpose. These results are discussed in relation to the sensory cues and receptors for oviposition in other Lepidoptera, especially moths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301747
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Regional specificity of functional sensory connections in developing spinal cord cultures varies with the incidence of spontaneous bioelectric activity (1987)
    Springer
    Development genes and evolution 196 (1987), S. 401-404 
    Details
    ISSN: 1432-041X
    Keywords: Spinal cord explant cultures ; Innervation ; Sensory connections ; Topography of afferent terminals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Cultured spinal cord explants in which little spontaneous bioelectric activity was present showed, when monitored using sensory ganglion-evoked monosynaptic action potentials, diffuse innervation by ingrowing afferent fibers at 3–4 weeks in vitro. In contrast, highly active cultures of the same age showed a strong tendency for functional sensory connections to be made within the dorsal half of the cord. Regional specificity was present in mature cultures (4–5 weeks in vitro), however, even when their spontaneous activity level was low. The results support earlier results using tetrodotoxin, and make it appear likely that centrally generated neuronal discharges can influence the topography of afferent terminals within the developing spinal cord.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00375781
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Pexider's equation and aggregation of allocations (1987)
    Springer
    Aequationes mathematicae 32 (1987), S. 227-239 
    Details
    ISSN: 1420-8903
    Keywords: Primary 39B30 ; 39B70 ; Secondary 90A07 ; 90A08
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract An extension theorem for Pexider's equation is proved and used to generalize the results in [4] to cases with weights with more than one constraint and to more general domains in a form which can be applied to multiobjective linear programming.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311311
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Bioelectric activity is required for regional specificity of sensory ganglion projections to spinal cord explants cultured in vitro (1987)
    Springer
    Development genes and evolution 196 (1987), S. 133-136 
    Details
    ISSN: 1432-041X
    Keywords: Neurogenesis ; Tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Chronic blockade of spontaneous nerve impulses by means of tetrodotoxin leads to abnormally diffuse afferent projections into spinal cord cross-sections cultured for two to six weeks in vitro. In addition, even untreated explants which show a low level of spontaneous cord discharges failed to develop the normal degree of dorsal pathway selectivity. It is therefore concluded that centrally generated neuronal activity may play an important role in eliminating ‘exuberant’ connections which, during early development, are transiently present in this part of the nervous system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00402035
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    HLA-DQw3.2 allele of the DR4 haplotype is associated with insulin-dependent diabetes; correlation between DQ β restriction fragments and DQ β chain variation (1987)
    Springer
    Immunogenetics 26 (1987), S. 299-303 
    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/BF00346526
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Seed selection by dark-eyed juncos (Junco hyemalis): optimal foraging with nutrient constraints? (1987)
    Springer
    Oecologia 74 (1987), S. 106-111 
    Details
    ISSN: 1432-1939
    Keywords: Optimal foraging ; Nutrient constraints
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Observations of the foraging behavior of six captive dark-eyed juncos (Junco hyemalis) are used to test the assumptions and predictions of optimal diet choice models (Pyke et al. 1977) that include nutrients (Pulliam 1975). The birds sequentially encountered single seeds of niger thistle (Guizotia abyssinica) and of canary grass (Phalaris canariensis) on an artificial substrate in the laboratory. Niger thistle seeds were preferred by all birds although their profitability in terms of energy intake (J/s) was less than the profitability of canary grass seeds. Of four nutritional components used to calculate profitabilities (mg/s) lipid content was the only characteristic that could explain the junco's seed preference. As predicted by optimal diet theory the probability of consuming niger thistle seeds was independent of seed abundance. However, the consumption of 71–84% rather than 100% of the seeds encountered is not consistent with the prediction of all-or-nothing selection. Canary grass seeds were consumed at a constant rate (no./s) independent of the number of seeds encountered. This consumption pattern invalidates a model that assumes strict maximization. However, it is consistent with the assumption that canary grass seeds contain a nutrient which is required in minimum amounts to meet physiological demands (Pulliam 1975). These experiments emphasize the importance of incorporating nutrients into optimal foraging models and of combining seed preference studies with studies of the metabolic requirements of consumers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377353
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Localization of the human multiple drug resistance gene, MDR1, to 7q21.1 (1987)
    Springer
    Human genetics 〈Berlin〉 77 (1987), S. 142-144 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Multiple drug resistance has been shown to be associated with amplification/increased expression of a gene designated MDR. The localization of one member of the MDR gene family, MDR1, to the long arm of chromosome 7 by in situ hybridization is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272381
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Determining the origin of human X isochromosomes by use of DNA sequence polymorphisms and detection of an apparent i(Xq) with Xp sequences (1987)
    Springer
    Human genetics 〈Berlin〉 77 (1987), S. 236-240 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The parental origin of five X isochromosomes were determined using 11 DnA markers. The isochromosome was derived from a maternal X chromosome in three cases and from a paternal X chromosome in two. Unexpected heterozygosity was detected for the proximal Xp region in one individual in whom the i(Xq) chromosome was paternally derived. This was confirmed by in situ hybridisation. A mode of formation of isochromosomes by breakage and reunion between the sister chromatids of the arms of an X chromosome is proposed to account for this. Sister chromatid breakage and reunion can be considered as a significant mechanism for the origin of i(Xq) chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284476
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...