Federal Republic of Germany The Annual Report for 1987 of the Deutsche Forschungsgemeinschaft (German Research Association)

Editorial NoteScience Policy News

Federal Republic of Germany The Annual Report for 1987 of the Deutsche Forschungsgemeinschaft (German Research Association)     

United kingdom: The Annual Report for 1988/89 of the Medical Research Council

United kingdom: The Annual Report for 1988/89 of the Medical Research Council     

United States: The Visiting Program of the National Institutes of Health: Stipends for 1990

United States: The Visiting Program of the National Institutes of Health: Stipends for 1990     

United Kingdom: The Science and Engineering Research Council (SERC): A Report on Research in the United Kingdom,France and Germany (W)

Science Policy News

United Kingdom: The Science and Engineering Research Council (SERC): A Report on Research in the United Kingdom, France and Germany (W)     

Ecdysone: An antagonist of juvenile hormone in the control of cuticle synthesis in the German cockroach (Blattella germanica)

Zusammenfassung Behandlung vonBlattella germanica im letzten Larvenstadium mit hohen Dosen von Juvenilhormon verhindert ausser der Morphogenese auch die Bildung der neuen Cuticula und die Häutung. Die Prothoracaldrüsen der entstandenen Dauerlarven sind normal; durch anschliessende Injektion von -Ecdyson wird Cuticulasynthese induziert, die Tiere sterben jedoch in der alten Haut. Diese Befunde unterstützen die Hypothese der antagonistischen Wirkung von Juvenilhormon und Ecdyson.     

Switzerland The Annual Report for 1987 of the Swiss National Science Foundation

Switzerland The Annual Report for 1987 of the Swiss National Science Foundation     

The defensive secretion of the tiger beetleCicindela flexuosa (F.) (Cicindelinae; Carabidae)

Summary The pygidial gland secretion of the tiger beetleCicindela flexuosa consists of tetradecylacetate and hexadecylacetate. It functions as a defense mechanism.     

The European Science Foundation: Excerpts from the annual report for 1987

Science Policy News

The European Science Foundation: Excerpts from the annual report for 1987     

Mogg’s celestial sphere (1813): the construction of polite astronomy

In this paper I discuss a cardboard dissected globe made in 1813 by Edward Mogg, a cartographer and map seller, to instruct children in the principles of astronomy. Since little is known about the maker or the specific object, I draw on evidence beyond the sphere itself to construct an account of how the object might have been used. In particular I address conversation as a key part of astronomical education and examine the way in which the cardboard plates of the sphere, the presentation slipcase and the accompanying booklet would have prepared young learners for polite astronomical discourse around large instruments in later life.     

The mitotic chromosomes of the lampreyMordacia mordax (agnatha: Petromyzonidae)

Résumé L'étude des chromosomes somatiques de la lamproie de l'hémisphère sud,Mordacia mordax (Richardson), montre que l'équipement chromosomique diploïde de cette espèce est composé de 76 chromosomes très petits. La plupart des chromosomes sont métacentrique ou bien submétacentrique. Ces chromosomes sont différents en nombre de ceux décrits pour les lamproies de l'hémisphère nord.     

A first report of relative movements within the hyoid apparatus during feeding inAnolis equestris (Reptilia: Iguanidae)

Cellular and Molecular Life Sciences - The movements of the hyoid apparatus ofAnolis equestris, during mechanical reduction of prey, have been studied by cinefluoroscopy. In the SO and FO stages,...     

A novel mechanism for jumping in the indian ant<Emphasis Type="Italic">Harpegnathos saltator</Emphasis> (Jerdon) (Formicidae,Ponerinae)

The Indian antHarpegnathos saltator may be unique among insects in using its jumping capacity not only as an escape mechanism but also as a normal means of locomotion, and for catching its prey in flight. High-speed cinematography used to analyse the various phases of the jump suggests thatHarpegnathos employs a novel jumping mechanism to mediate these behaviours: namely the synchronous activation of its middle and hindlegs. Electrophysiological recordings from muscles or nerves in pairs of middle and hindlegs show remarkably synchronous activity during fictive jumping, supporting the synchronous activation hypothesis.Harpegnathos is not the only ant to jump, and a cladistic analysis suggests that jumping behaviour evolved independently three times during ant evolutionary history.