"British biologist" . "2004-01-05Z"^^ . "Heatley, Norman"@en . "Norman Heatley"@en . . . . . "2004Z"^^ . . "Norman George Heatley (10 January 1911 \u2013 5 January 2004) was a member of the team of Oxford University scientists who developed penicillin. Norman Heatley developed the back extraction technique for efficiently purifying penicillin in bulk."@en . "1911-01-10Z"^^ . . "1911Z"^^ .