History of penicillin History of penicillin The history of penicillin follows a number of observations and discoveries of apparent evidence of antibiotic activity in molds before the modern isolation of the chemical penicillin in 1928. There are anecdotes about ancient societies using molds to treat infections, and in the following centuries many people observed the inhibition of bacterial growth by various molds. However, it is unknown if the species involved were "Penicillium" species or if the antimicrobial substances produced were penicillin. The Scottish physician Alexander Fleming was the first to suggest that a "Penicillium" mold must secrete an antibacterial substance, and the first
Joan S. Valentine in Inorganic Chemistry from Princeton University in 1971. In 1972, she moved to Rutgers University where she served as Assistant, Associate and Professor of Chemistry. In 1980, she moved to UCLA and became a Professor in 1981. From 1991 to 1994, she also served as Departmental Vice Chair for Research and Administration. From 1989 to 1995, she was the Associate Editor for the journal "Inorganic Chemistry". Valentine served as Director of the UCLA Chemistry-Biology Interface Predoctoral Training Program from 1993 to 2001. Joan S. Valentine Joan Selverstone Valentine (born 1945) is a biological inorganic chemist and biochemist. Valentine's current work