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
Uncle Valentine noise from works being done on the newly purchased house, jarring the ambience and atmosphere of the rural place. Uncle Valentine Uncle Valentine is a short story by Willa Cather. It was first published in "Woman's Home Companion" in February 1925. A music teacher is giving a lesson to an American girl, who says she has been practising songs by Valentine Ramsay. The teacher says another lady in the room can tell her more about him. Marjorie explains Valentine was her uncle. One day, her Aunt Charlotte is getting ready for her brother to come back after leaving for Europe