Mozambique 2011 Alexander Fleming

On 30 June 2011 Mozambique released 2 souvenir sheets celebrating the life of Alexander Fleming as one of the most important scientists in the 20th century. Knighted in 1944, Sir Alexander Fleming, a Scottish biologist and pharmacologist, was born 6 August 1881. He discovered penicillin in 1928, pioneering the age of antibiotics, and received the Nobel Prize in Physiology and Medicine in 1945 for it. In 1999, Time magazine named Fleming one of the 100 Most Important People of the 20th Century. As such a famous personality, Sir Alexander Fleming is featured in many stamps. For this issue, the first stamp in the souvenir sheet with 4 stamps features the molecular structure of penicillin, whereas the core structure of the penicillin group of antibiotics is shown on the selvage of the smaller souvenir sheet. The background of both souvenir sheets are filled with white pills, probably an antibiotic.

DNA representing biology on Liechtenstein stamp

On 28 August 1969 Liechtenstein released a set of 4 stamps to celebrate the 250th anniversary of the Duchy of Liechtenstein. Each of the 4 stamps features an important field of study - biology, physics, astronomy and art. The stamp representing biology features a man and the double-helical structure of DNA. This is the earliest use of the double helix to represent science on a stamp design. Scott 454.

Peru 2011 International Year of Chemistry

Peru released on 1 August 2011 a stamp commemorating the International Year of Chemistry, featuring an array of symbols representing the connections between chemistry and the Peruvian coat of arms. For example, the helical structure of keratin, the main polymeric material that makes up the wool of the vicuña and other camelids, is shown to the left of the coat of arms; and to right, the molecular structure of quinine, the classic antimalarial drug extracted from the bark of the cinchona tree. Also shown are the symbol and electronic configuration of gold (Au for Aurantium) since a cornucopia spilling coins of the noble metal is included in the bottom half of the coat of arms. Then there's the logo of the Colegio de Químicos del Perú, the organization representing all professional chemists in the country (not to be confused with the Peruvian Chemical Society). The lower portion of the stamp has images showing chemists handling reagents and working in laboratories.