With the zoologist Alfred K�hn, he investigated the color perception of bees; for the chemist Adolf Windaus, he applied optical spectroscopy to the separation of Ergosterol from Cholesterol.
12.
Immediately following, they both were accepted as postdoctoral fellows at the University of G�ttingen, Germany, where she worked with Nobel prize winners Adolf Otto Reinhold Windaus and Adolf Butenandt.
13.
For his Ph . D he joined the working group of the Nobel laureate Adolf Windaus at the University of G�ttingen and he finished his studies with a Ph . D . in chemistry in 1927.
14.
Because the newly discovered substance was the fourth vitamin identified, it was called vitamin D . The 1928 Nobel Prize in Chemistry was awarded to Adolf Windaus, who discovered the steroid 7-dehydrocholesterol, the precursor of vitamin D.
15.
Among them are the Nobel Prize winners Hans von Euler-Chelpin, Johannes Stark, Heinrich Wieland and Adolf Windaus, as well as five women : Anna Bahr-Mildenburg, Hedwig Bleibtreu, Agnes Bluhm, Isolde Kurz, and Lulu von Strau?und Torney.
16.
He ascertained that cholesterol or a closely related compound also behaved in the same way, and he worked with Adolf Otto Reinhold Windaus and published a paper with Windaus in 1927 entitled " Development of marked activity in ergosterol following ultraviolet irradiations ", showing that rickets could be prevented in rats with irradiated ergosterol.
17.
He ascertained that cholesterol or a closely related compound also behaved in the same way, and he worked with Adolf Otto Reinhold Windaus and published a paper with Windaus in 1927 entitled " Development of marked activity in ergosterol following ultraviolet irradiations ", showing that rickets could be prevented in rats with irradiated ergosterol.
