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  • Chemistry  (2)
  • Arkona ozone measurements  (1)
  • Direction-selective neurons  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A system of insect neurons sensitive to horizontal and vertical image motion connects the medulla and midbrain (1991)
    Springer
    Journal of comparative physiology 169 (1991), S. 355-367 
    Details
    ISSN: 1432-1351
    Keywords: Motion-sensitive neurons ; Direction-selective neurons ; Insect medulla ; Contrast frequency ; Motion detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The response properties and gross morphologies of neurons that connect the medulla and midbrain in the butterfly Papilio aegeus are described. The neurons presented give direction-selective responses, i.e. they are excited by motion in the preferred direction and the background activity of the cells is inhibited by motion in the opposite, null, direction. The neurons are either maximally sensitive to horizontal motion or to slightly off-axis vertical upward or vertical downward motion, when tested in the frontal visual field. The responses of the cells are dependent on the contrast frequency of the stimulus with peak values at 5–10 Hz. The receptive fields of the medulla neurons are large and are most sensitive in the frontal visual field. Examination of the local and global properties of the receptive fields of the medulla neurons indicates that (1) they are fed by local elementary motion-detectors consistent with the correlation model and (2) there is a non-linear spatial integration mechanism in operation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207000
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Regionally Representative Ozone Monitoring at Cape Arkona (1997)
    Springer
    Journal of atmospheric chemistry 28 (1997), S. 97-109 
    Details
    ISSN: 1573-0662
    Keywords: Arkona ozone measurements ; DOAS-measurements ; ozone differences point measurements to Long Path-DOAS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Long Path Different Optical Absorption measurements of theconcentrations of O3, NO2, NO3 andSO2 were carried out at Cape Arkona, Island Rügen, nearthe well-known long-term ozone registration. A statistical analysis ofdifferent trace gas concentrations for all seasons is presented. Daytimedata, wind speed and sector-classified results are used to estimaterepresentative ozone concentrations. Comparison of the long path ozonemeasurements with point measurements at Cape Arkona shows ozoneconcentration differences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005849431461
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Physical modelling fire performance of wall-covering materials (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 17 (1993), S. 293-303 
    Details
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A small-scale enclosure was constructed for characterizing the contribution of interior finish wall-lining materials to fire growth in compartments. The enclosure was based upon refinements to a design devised by scientists at the National Institute for Standards and Technology for quarter-scale modelling of room fire tests on interior-finish materials. A large volume of evidence is presented demonstrating how this small-scale enclosure could provide the information about surface flammability, heat release, smoke generation and contribution to fire growth that is required for a reasonable assessment of the fire performance of interior wall-finish materials.
    Additional Material: 22 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fam.810170606
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectrometry of the 11H-dibenzo[c,f][1,2]-diazepine systemPartial support of this work by US Public Health Service Grant CA 08495, National Cancer Institute is gratefully acknowledged.See Ref. 1. (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 1169-1174 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of 3,8-dichloro-11H-dibenzo[c,f] [1,2]diazepine, the corresponding diazepin-11-01 and diazepin-11-one and their dihydro and N-oxide derivatives have been recorded. The most important fragmentation of the molecular ions of all diazepines studied was an initial loss of m/e 28, with further fragmentation depending on the 11-substituent. No general pathway was observed for the corresponding N-oxides and dihydro compounds.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210030905
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    Paper (German National Licenses)
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