Behring Werke

Activated Partial Thromboplastin Time (APTT). To 0.1 ml of citrated plasma 0.1 ml of human placenta lipid extract (Pathrombin, Behring Werke, Marburg) is added and the mixture is incubated for 2 min at 37 °C. The coagulation process is initiated by the addition of 0.1 ml 25 mM calcium chloride when the coagulometer is started and the time to clot formation is determined. The APTT measures effects on the endogenous pathway of coagulation. 

Aliquots (0.45 ml) of the euglobulin solution are transferred to test tubes, and 0.05 ml thrombin (Test Thrombin, Behring Werke) (25 U/ml) are added. The tubes are transferred to a water bath at 37 °C. The time interval between the addition of thrombin and the complete lysis of the clots is measured. 

One milliliter of horse anti-Fc serum (Behring-Werke Inst., Frankfurt, GFR) is added to 25 ml of 0.5 M NaCl-0.1 M NaHCOg buffer, pH... 

Jachertz, D. Replicase, an enzyme for multiplication of informational RNA. Behring-werke-Mitt., H. 49, 147 (1969). 

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