In Germany David Gans wrote on astronomy, and also the historical work Zemah David (Prag, 1592).
On the other hand Mendelssohn by his pragmatic conception of religion (specially in his Jerusalem) weakened the belief of certain minds in the absolute truth of Judaism, and thus his own grandchildren (including the famous musician Felix Mendelssohn-Bartholdy) as well as later Heine, Borne, Gans and Neander, embraced Christianity.
D-Mannose, first prepared by oxidizing d-mannite, found in plants and manna-ash (Fraxinus ornus), was obtained by Tollens and Gans on hydrolysing cellulose and by Reis from seminine (reserve cellulose), found in certain plant seeds, e.g.
Gustav Heinrich Gans, Edler zu Putlitz >>
Early in the 19th century he was associated with Gans Moser and Heine in an association which the last named called "Young Palestine."
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