Search results
Results From The WOW.Com Content Network
The history of penicillin follows observations and discoveries of evidence of antibiotic activity of the mould Penicillium that led to the development of penicillins that became the first widely used antibiotics. Following the production of a relatively pure compound in 1942, penicillin was the first naturally-derived antibiotic.
Sample of penicillin mould presented by Alexander Fleming to Douglas Macleod in 1935. The discovery of penicillin was one of the most important scientific discoveries in the history of medicine. Ancient societies used moulds to treat infections and in the following centuries many people observed the inhibition of bacterial growth by moulds.
Sir Alexander Fleming FRS FRSE FRCS [2] (6 August 1881 – 11 March 1955) was a Scottish physician and microbiologist, best known for discovering the world's first broadly effective antibiotic substance, which he named penicillin.
1942 – benzylpenicillin, the first penicillin; 1942 – gramicidin S, the first peptide antibiotic; 1942 – sulfadimidine; 1943 – sulfamerazine; 1944 – streptomycin, the first aminoglycoside [2] 1947 – sulfadiazine; 1948 – chlortetracycline, the first tetracycline; 1949 – chloramphenicol, the first amphenicol [2] 1949 – neomycin
Penicillin molecules are small enough to pass through the spaces of glycoproteins in the cell wall. For this reason Gram-positive bacteria are very susceptible to penicillin (as first evidenced by the discovery of penicillin in 1928 [46]). [47] Penicillin, or any other molecule, enters Gram-negative bacteria in a different manner. The bacteria ...
Orr-Ewing, the daughter of John Orr-Ewing and his first wife Ellen Clarissa (née Kennard), was born on 28 April 1897. [2] Her paternal grandfather was Sir Archibald Orr-Ewing, 1st Baronet [3] and her maternal grandfather, Howard John Kennard, was co-founder of the London Stereoscopic and Photographic Company.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Granville Raymond Rettew (April 19, 1903 – June 24, 1973), known as G. Raymond Rettew, was an American chemist and mushroom spawn cultivator from Pennsylvania who pioneered the mass production of penicillin, the world’s first antibiotic. His methods helped save the lives of tens of thousands of wounded American and Allied troops during ...