<sod>After five years spent working at his uncle's pharmacy in [[Dresden]], he moved to [[Berlin]], where he worked for two and a half years in the laboratory of chemist Johann Gottfried August Helming (1770-1830). In 1830 he became an assistant to [[Eilhard Mitscherlich]] at Berlin, subsequently receiving his doctorate with a thesis on [[pollen]], ''Dissertatio de plantarum polline'' (1833). In 1844 he became an associate professor in [[St. Petersburg]], where in 1852 he attained a full professorship.<ref name=AD>[http://de.wikisource.org/wiki/ADB:Fritzsche,_Karl_Julius ADB: Fritzsche, Karl Julius] at [[Allgemeine Deutsche Biographie]]</ref><ref>[https://books.google.com/books?id=EV4oAAAAYAAJ&pg=PA132&lpg=PA132&dq=%22Carl+Julius+Fritzsche%22+Dresden&source=bl&ots=0n1TWu0ryG&sig=ulh0EpJHh8i9_3YtZnRltK5_owc&hl=en&sa=X&ei=4Bw7VYiGI8vGogTjwoHoCg&ved=0CEkQ6AEwBQ#v=onepage&q=%22Carl%20Julius%20Fritzsche%22%20Dresden&f=false Google Books] Berichte der Deutschen Chemischen Gesellschaft, Volume 5</ref><eod>
<sod>After five years spent working at his uncle's pharmacy in [[Dresden]], he moved to [[Berlin]], where he worked for two and a half years in the laboratory of chemist Johann Gottfried August Helming (1770–1830). In 1830 he became an assistant to [[Eilhard Mitscherlich]] at Berlin, subsequently receiving his doctorate with a thesis on [[pollen]], ''Dissertatio de plantarum polline'' (1833). In 1844 he became an associate professor in [[St. Petersburg]], where in 1852 he attained a full professorship.<ref name=AD>[http://de.wikisource.org/wiki/ADB:Fritzsche,_Karl_Julius ADB: Fritzsche, Karl Julius] at [[Allgemeine Deutsche Biographie]]</ref><ref>[https://books.google.com/books?id=EV4oAAAAYAAJ&pg=PA132&lpg=PA132&dq=%22Carl+Julius+Fritzsche%22+Dresden&source=bl&ots=0n1TWu0ryG&sig=ulh0EpJHh8i9_3YtZnRltK5_owc&hl=en&sa=X&ei=4Bw7VYiGI8vGogTjwoHoCg&ved=0CEkQ6AEwBQ#v=onepage&q=%22Carl%20Julius%20Fritzsche%22%20Dresden&f=false Google Books] Berichte der Deutschen Chemischen Gesellschaft, Volume 5</ref><eod>