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Norman George Heatley OBE (10 January 1911 – 5 January 2004) was an English biologist and biochemist. [1] He was a member of the team of Oxford University scientists who developed penicillin . [ 2 ] [ 3 ] Heatley developed the back-extraction technique for efficiently purifying penicillin in bulk.
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.
Penicillin, a drug produced by P. chrysogenum (formerly P. notatum), was accidentally discovered by Alexander Fleming in 1929, and found to inhibit the growth of Gram-positive bacteria (see beta-lactams). Its potential as an antibiotic was realized in the late 1930s, and Howard Florey and Ernst Chain purified and concentrated the compound.
Penicillin and other β-lactam antibiotics act by inhibiting penicillin-binding proteins, which normally catalyze cross-linking of bacterial cell walls. Penicillin kills bacteria by inhibiting the completion of the synthesis of peptidoglycans, the structural component of the bacterial cell wall. It specifically inhibits the activity of enzymes ...
Glass phial of British Standard penicillin. 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 ...
Fleming's discovery of penicillin changed the world of modern medicine by introducing the age of useful antibiotics; penicillin has saved, and is still saving, millions of people around the world. [81] The laboratory at St Mary's Hospital where Fleming discovered penicillin is home to the Fleming Museum, a popular London
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Mary Ethel Florey (née Hayter Reed), Baroness Florey (1 October 1900 – 10 October 1966) was an Australian doctor and medical scientist. Her work was instrumental in the discovery of penicillin. She was part of the team that ran the first trials on penicillin and first administered the drug in a human trial.