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  • 1
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Motion-sensitive neurons ; Direction-selective neurons ; Insect medulla ; Contrast frequency ; Motion detection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00207000
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  • 2
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Maschinenbau
    Notizen: 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.
    Zusätzliches Material: 22 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/fam.810170606
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  • 3
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: 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.
    Zusätzliches Material: 9 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/oms.1210030905
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