Impact of the natural resource of UVB on the content of vitamin D2 in oyster mushroom (Pleurotus ostreatus) under subtropical settings

by Tibebeselassie Seyoum Keflie, Nils Nölle, Christine Lambert, Donatus Nohr, Hans Konrad Biesalski
Published 2019-11-01

Vitamin A and zinc deficiencies among tuberculosis patients in Ethiopia

by Tibebeselassie Seyoum Keflie, Aregash Samuel, Ashagrie Zewdu Woldegiorgis, Adane Mihret, Markos Abebe, Hans Konrad Biesalski
Published 2018-08-01