1. With Johannes Burchard, he is making a case for your father's deposition.

2. There are many different ways of detecting 7DHC levels in blood plasma, one way is using the Liebermann–Burchard (LB) reagent.

3. Their most important representatives were Wigbold of Holte, Archbishop of Cologne and Arch-Chancellor of the Empire, the Essen prince-abbess, Beatrice of Holte, and the bishops of Münster, Burchard of Holte, William I of Holte and Ludolf of Holte.