Phagocytose des liposomes par les macrophages péritonéaux de souris

Summary Uptake of¹⁴C-cholesterol or³H-cholesterol labelled liposomes, stimulation of¹⁴C-glucose oxidation, as well as ultrastructural and autoradiographical experiments have shown that liposomes are phagocytized by mouse peritoneal macrophages. Further results have shown that degradation of liposomes was not complete 2 h after uptake.     

Automatische Dämmerungsschalter für Aktivitätsversuche

Summary Two methods of automatic regulation of light are described. The start of dawn and dusk is made with an external contact to a switchclock. The duration of regulation is more than 30 min.     

alpha-Chain contacts in the polymerisation of sickle haemogloblin.

Five new double-mutant haemoglobins composed of betaS chains and alpha chains with different substitutions, which are located at the surface of the tetramer, have been prepared. Although all the hybrids are more soluble than deoxyhaemoglobin S, the individual differences between these molecules make it possible to evaluate several regions on the alpha chains for intermolecular contacts in the polymerisation of deoxyhaemoglobin S.     

«LH-Releasing-Factor» beim Menschen

Summary There is evidence for LH-releasing-factor (LH-RF) in 18 crude acid extracts of human median eminence preparation following the procedure described byRamirez andMcCann.