
Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1945
1952-3
1830 (original); 1967 (model)
1955; 1830
1944
1938 and 1951
1944-1945
2000-100 BCE
1943
1839 (original); circa 1988 (replica)
1801-1892 (prepared); 1946 (element replaced)
1944
4000-2001 BCE
1943-1945
1903 (original); 1982 (model)
circa 1945
1943
1945
1990-95
1945
1944
1943
1945
circa 1945
1945
1945
1945
1945
1945
1945
1945
1943
1943
circa 3000 BCE
1943-1945
2000 BCE
1943
1943
1943
1943
1943
1943
1943
1944
30-300
2000-1350
2050-1750 BCE
10,000-2,000 BCE
1943