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Summary

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Summary and Conclusion1. Diurnal variation in fibrinolysis is marked in the Whites and almost absent in the Bantu. >2. The difference in fibrinolytic activity beween White and Bantu has been confirmed, but was found to decrease over the course of the morning due to diurnal variation in the White subjects.3. The ingestion of butter fat does not inhibit fibrinolysis to any appreciable extent in either White or Bantu.4. The accelerating effect of heparin on fibrinolysis was found to be present in lipaemic plasma, but appears to be distinct from the fat-clearing effect.

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