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
  • 1
    Electronic Resource
    Electronic Resource
    Behavioral responses of the smaller European elm bark beetle, Scolytus multistriatus, to extracts of non-host tree tissues (1968)
    Springer
    Entomologia experimentalis et applicata 11 (1968), S. 464-469 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Benzol-Rohextrakte von 6 Nicht-Wirtsbäumen riefen allein bei erwachsenen Scolytus multistriatus (Marsh.) keine Fraßreaktionen hervor. Wurden sie zu gleichen Teilen mit einem stimulierenden Extrakt von Ulmus americanus L. kombiniert, so setzten alle Rohextrakte aus Nicht-Wirten die Fraßmenge herab, die sonst auftritt. Wenigstens zwei der Nicht-Wirte (Populus deltoides Bartr. und Aesculus octandra Marsh.) enthielten auf kurze Entfernung wirkende positive Reize, aber ihr Einfluß auf eine positive Reaktion des Insekts wurde bei den meisten Behandlungen durch Verbindung mit abweisenden (deterrent) Stoffen verhindert. So spielen bei der Auslösung der Ablehnung von Rohextrakten der Nicht-Wirte durch die Käfer Deterrent- und Repellent-Reize die Hauptrolle.
    Notes: Abstract Crude benzene extracts of 6 non-host trees alone did not stimulate feeding responses by adults of Scolytus multistriatus (Marsh.). When combined equally with a stimulatory extract from Ulmus americana L., all of the crude non-host extracts reduced the amount of feeding which otherwise occurred. At least two of the non-hosts (Populus deltoides Bartr. and Aesculus octandra Marsh) contained positive short-range orientational stimuli, but their induction of a positive response by the insect was prevented in most treatments by associated deterrent chemicals. Thus, stimuli (deterrents and repellents) played the dominant role in eliciting the rejection of crude non-host extracts by the beetles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364577
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A relaxed interior approach to nonlinear programming (1969)
    Springer
    Probability theory and related fields 11 (1969), S. 327-337 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary This paper contains the mathematical validation of a new approach to mathematical programming problems based on a penalty function method. The given problem is replaced by a second „auxiliary“ problem which, in many cases may be solved by standard methods since it involves the maximization of a concave function of a single variable over an interval. The auxiliary problem is defined implicitly in therms of the constituents of the original problem. Examples are presented in order to illustrate the theoretical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00531654
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Expansion growth of isolated leaf blades of Todea barbara (1968)
    Springer
    Planta 80 (1968), S. 113-128 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Etiolation of Todea barbara sporophytes and the subsequent deetiolation of excised leaf blades have been studied. In etiolated plants leaf blade growth is arrested, petiole and stem growth is enhanced, and root growth is decreased. De-etiolation permits the resumption of leaf blade growth and differentiation, and the resulting de-etiolated blade appears comparable to its light-grown counterpart in every respect but cell number. Only two factors are required to attain maximum surface area growth in cultured leaf blades; these are light and sucrose. The addition of plant growth substances does not increase the final area attained. However, the inhibition of leaf blade growth with growth retardants and its partial reversal by exogenously supplied gibberellic acid demonstrates a role for gibberellins in leaf expansion in Todea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385587
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The permutability of orthogonal subnormal subgroups (1965)
    Springer
    Mathematische Zeitschrift 90 (1965), S. 365-372 
    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/BF01112355
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    A note on subnormal coalition classes (1965)
    Springer
    Mathematische Zeitschrift 90 (1965), S. 373-375 
    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/BF01112356
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Improved electrophoretic resolution of some hemoglobin variants in Mus musculus (1969)
    Springer
    Biochemical genetics 3 (1969), S. 303-309 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Electrophoretic separation of house mouse (Mus musculus) hemoglobins on starch gel in a 0.2 M tris maleate NaOH pH 7.0 buffer facilitates the recognition of the three phenotypes controlled by locus Hbb. Evidence that Hbb does control the electrophoretic patterns with this buffer system is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00521146
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Isozyme genotype-environment relationships in natural populations of the harvester ant, Pogonomyrmex barbatus, from Texas (1969)
    Springer
    Biochemical genetics 3 (1969), S. 429-450 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Three different allelic isozyme systems (two esterases, ESH and ESR, and a malic dehydrogenase, MDH) were analyzed in population samples of a species of ant, Pogonomyrmex barbatus, from Texas. Allelic frequencies were determined for several collection localities, and a number of significant differences were found. Principal component analysis was used to compare the patterns of variability of the allelic frequencies with environmental factors. Significant correlation was particularly evident with respect to weather and the pattern of variability in both esterases, and it is therefore suspected that natural selection is important in determining the allele frequency patterns. Observed and expected genotypic proportions were found in good agreement, generally, but in some localities homozygotes appeared in significantly greater numbers than expected. Heterotic selective maintenance was thus not indicated. Correlation found between patterns of variability in the enzyme systems themselves was consistent with the hypothesis that all three enzyme systems were affected by the environmental factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00485604
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Emission gradients in the continuum at the sun's limb (1968)
    Springer
    Solar physics 3 (1968), S. 513-522 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The intensity variation at the sun's limb has been studied in order to derive the gradient of the temperature in the low chromosphere. Eclipse observations show that in the continuum the height gradients of the total intensity vary systematically with wavelength; the observed gradient in the red is found to be steeper than in the blue. This wavelength dependence of the gradients is explained by the temperature increase in the low chromosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151933
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    An electron microscopic analysis of gliogenesis in rat optic nerves (1969)
    Springer
    Cell & tissue research 94 (1969), S. 293-324 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The development of neuroglia has been studied in rat optic nerves with the electron and light microscopes. The main findings of this investigation are as follows: 1. Transitional forms between the cell varieties present during development suggest a direct lineage from the neuroectodermal matrix cells lining the lumen of the optic stalk to all neuroglial cell types. There was no evidence of mesenchymal cell invasion, either from the meninges or blood vessels, into optic nerve parenchyma. 2. One variety of undifferentiated cells, namely the small glioblasts, may have the potential to either remain in the mitotic cycle giving rise to additional glioblasts, or to differentiate into either astrocytes or oligodendrocytes. Some small glioblasts are retained in fully mature rat optic nerves as a third type of neuroglia and these cells might be a source of the additional oligodendrocytes and/or astrocytes that arise within adult central nervous tissue. 3. Astrocytes begin to appear during fetal development. Oligodendrocytes first appear just prior to the time when myelination begins (i.e. 7–9 days postnatal). The early postnatal oligodendrocytes that are forming myelin sheaths are markedly different in appearance from those in mature nerves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319179
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    facet.materialart.
    Unknown
    A relaxed interior approach to nonlinear programming (1969)
    Springer
    Details
    Publication Date: 1969-01-01
    Print ISSN: 0178-8051
    Electronic ISSN: 1432-2064
    Topics: Mathematics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...