19th-century French biologists

François-Vincent Raspail, L.L.D., M.D. (25 January 1794 – 7 January 1878) was a French chemist, naturalist, physician, physiologist, attorney, and socialist politician.

Stéphane Leduc (1 November 1853 – 8 March 1939) was a French biologist who sought to contribute to understanding of the chemical and physical mechanisms of life. He was a scientist in the fledgling field of synthetic biology, particularly in relation to diffusion and osmosis. He was a professor at the École de Médecine de Nantes and worked on osmotic crystallisation and the physiological effects of electric current. He was an Officier de la Légion d'honneur.