Jacques LoebDied 11 Feb 1924 at age 64 (born 7 Apr 1859). German-born American biologist noted chiefly for his experimental work on artificial parthenogenesis (reproduction without fertilization). Loeb was able to bring the unfertilized eggs of urchins and frogs to maturity by manipulating their environment, which influenced cell division. He also studied the tropisms of plants and simple animals, which means their reflexive responses to environmental stimuli. Before the age of thirty he published the "tropism theory" which was destined to make him famous. Loeb also worked on brain physiology and tissue regeneration. |
