Inhibition of firefly bioluminescence by scavengers of singlet oxygen,superoxide radicals and hydroxyl radicals

Summary The participation of highly energetic oxygen species in the ATP-induced bioluminescence of a firefly-extract has been investigated. The inhibition of light emission by a variety of specific scavengers suggests that singlet oxygen, superoxide radicals and hydroxyl radicals are important intermediates in the firefly bioluminescence reaction.Acknowledgments. I thank Prof. R. Bachofen, Institut für Allgemeine Botanik, Abteilung Mikrobiologie, Universität Zürich, Switzerland, in whose laboratory most of these studies have been performed, for his cooperativity. Financial support by the Deutsche Studienstiftung is gratefully acknowledged.     

Verhalten von Hippocampus-Pyramidenzellen bei retikulärer Reizung

Summary No consistent correlation was found to exist between pyramidal cell activity and the type of hippocampal electrical activity. The type of hippocampal EEG pattern seems to be determined by the firing pattern of septal neurons rather than pyramidal neurons.

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Stipendiat der IBRO/UNESCO.     

A new marker technique in cineradiography for the recording of movements in small vertebrates —Application to the study of jaw movements in soricids (Insectivora)

Summary Dental parapulpar pins (TMS^® Link Series) are reliable markers in cineradiography for the recording of movements in small vertebrates. The application of the pins to an analysis of mandibular movements of soricids allows a reconstruction of the complex movement pattern of both jaws during mastication.Authors in alphabetical order.