Dopamine-sensitive adenylate cyclase within laminae of the olfactory tubercle.

There are three histological laminae within the rat olfactory tubercle: plexiform, pyramidal and polymorphic. We have assayed dopamine-sensitive adenylate cyclase in homogenates of frozen sections cut parallel to these laminae. Consecutive sections were cut of alternating thickness, 16 micron and 100 micron.

[The cubito-carpal region in gibbons].

As a continuation of our studies concerning the structure and fetal development of the human carpal articular disc (KAUER, 1968, 1975, 1976) we have investigated the disc-homologue in the Gibbon. For this purpose we have used the serial sectioned hand of a late-fetal specimen. The stratigraphical position of the os Daubentonii has been established comparing the situation in the Gibbon with that of the human ulno-carpal region.

[The development of the triangular ligament in man].

The origin of the carpal articular disc has been studied in serial sectioned embryonal and fetal hands. In particular the complex; ulnar styloid process--triangular disc--carpal joint has been considered. In this development a relation is brought about between the so-called lig.

Early alteration of poliovirus in infected cells and its specific inhibition.

HeLa cells infected with radioactive poliovirus type 2 were disrupted with ultrasonic treatment, followed by addition of a non-ionic detergent. Two types of virus particles were found to sediment at 80 to 90% the rate of native virus. The first of these appeared to be a complex of native virus particles and membrane components, since treatment with 0-2% SDS released infectious native particles.

The articular disc of the hand.

The carpal articular disc have been studied in serial sectioned embryonal and fetal hands. It can be concluded that the articular disc is an extensive fibrous system that comes from the ulnar edge of the distal end of the radius and reaches, bordered by the deep layer of the antebrachial fascia, the base of metacarpal V. In this course, insertions take place into the ulnar aspect of the head of the ulna, into the ulnar styloid process and into the ulnar carpals.

Responses of olfactory bulb neurones to odour stimulation of small nasal areas in the salamander.

1. Previous experiments have suggested that one way odours may be discriminated is by different spatial patterns of response at both the olfactory bulb and receptor level. The present experiments were designed to test to what extent the position of an odour on the receptor mucosa can influence the activity of olfactory bulb neurones.

Response patterns of amphibian olfactory bulb neurones to odour stimulation.

1. Responses of 199 single olfactory bulb neurones in the frog were observed with odour stimulation.2.

STUDIES ON THE FATE OF PLASMA PROTHROMBIN.

The level of the plasma prothrombin in the circulating blood is decreased during its passage through the pulmonary capillaries. In 85 per cent. of samples, plasma prothrombin has been found to be less in the blood of the left ventricle than in that from the right ventricle.