Isometric length-tension diagram for maximal tetanic contractions of cardiac muscle from a gastropod,Busycon canaliculatum

Zusammenfassung Der Herzmuskel von Mollusken unterscheidet sich von der übrigen Molluskenmuskulatur entsprechend wie sich der Herzmuskel der Wirbeltiere von ihrer Skelettmuskulatur unterscheidet, insofern man die Beziehungen zwischen passiver und aktiver Kraft betrachtet. Im Herzmuskel der Mollusken lässt sich der maximale Tetanus für die Messung der aktiven Kraft verwenden.

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This work was supported by Grant No. GB5598 from the U.S. National Science Foundation.     

A new substrate for cultures of dissociated primary rat brain

Different substrates were used to coat plastic petri dishes for the cultivation of dissociated fetal rat brain cells. Only on surfaces which were coated with a mixture of serum and non-reconstituted collagen, did the majority of the inoculated cells attach singly or as aggregates within 24 h. The attachment of the cells was followed by the outgrowth of cellular processes either from single cells or from aggregates in the same time period. This did not occur on collagen or serum treated or on regular plastic dishes. Under the latter conditions a similar outgrowth was observed only after 3–5 days.     

Local haemostasis in brain tumours.

The thromboplastic activity and the fibrinolytic activity were examined in 7 human meningiomas and 6 gliomas obtained at neurosurgery. Two different haemostatic patterns emerged, meningiomas having lower thromboplastic and higher fibrinolytic activity than that of gliomas. This difference might help to explain the better haemostatic capacity of gliomas during and after operation than that of meningiomas.