Lui pascher.

                    Lui pascher.

Louis Pasteur grew up in a relatively poor family. He was one of four children, and his father was a tanner. In 1849 he married Marie Laurent, the daughter of the rector of the University of Strasbourg, where Pasteur was a professor of chemistry. They had five children together, only two of whom survived to adulthood. Among Louis Pasteur's discoveries were molecular asymmetry, the fact that molecules can have the same chemical composition with different structures; that fermentation is caused by microorganisms; and that virulence can be increased as well as decreased. He also disproved the theory of spontaneous generation and contributed to germ theory and the study of infectious disease.