... given salbutamol intravenously before and after the ingestion of 40 mg propranolol hydrochloride (Inderal®, ICI, England). The day before the experiment autologous platelets were labelled in vitro with 51Cr and were injected into the subjects. At the labelling procedure a Ringer-citratedextrose solution...

... labelling of platelets. The in vitro labelling of platelets with (51Cr) sodium chromate is cur­ rently carried out using plasma as incubation medium. However, on the basis of recent studies on the uptake of chromate by the platelets, it was suggested that protein free media should be preferred...